JP2015019831A - Vacuum cleaner suction tool and vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner suction tool in which noise generated in a flow passage part is reduced, and a vacuum cleaner using the same.SOLUTION: A vacuum cleaner includes a cleaner body including an electric blower for generating suction force and a dust collection part, and a suction tool. The suction tool includes: a suction chamber that supports a first rotary cleaning body 20 having a rotary shaft parallel to a cleaning surface; a housing chamber for housing an electric motor for rotationally driving the first rotary cleaning body 20 and a control board; and a suction port case 10 that partitions the suction chamber and the housing chamber. A flow passage cover 100 is provided in the suction port case 10 for preventing the flow passage from sharply enlarging or contracting, and has one or more through-hole 100a. By providing a soft member 101 with sound absorption effect adjacent to the flow passage cover 100 so as to close the through-hole 100a, it is possible to effectively reduce noise generated in the flow passage part.

Description

  The present invention relates to a vacuum cleaner suction tool and a vacuum cleaner using the same.

  As a suction tool of a conventional vacuum cleaner, a space in which a sound absorbing material is arranged is provided between the main body housing and the top cover, and the suction tool is generated by communicating with the motor storage chamber or the suction port through a plurality of small holes. A technique for reducing noise has been proposed (see, for example, Patent Document 1).

JP2013-63114A

  However, the suction tool of the vacuum cleaner described in Patent Document 1 has the upper part of the motor housing chamber covered with a cover, which reduces the noise level in the communicating expansion chamber, but the flow path cross-sectional shape changes greatly. The noise generated in the flow path from the expansion chamber to the connecting pipe, which greatly affects the noise at the suction port, leaks to the outside from the rotating and connecting parts of each component, and the generation of noise was not suppressed.

  An object of this invention is to provide the suction tool of the vacuum cleaner which reduced the noise which generate | occur | produced in the flow-path part efficiently, and a vacuum cleaner using the same.

The present invention includes an electric blower that generates a suction force, 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 including a cleaning surface, A first rotary cleaning body having a parallel rotary shaft; and an output shaft disposed above (upper rear) of the first rotary cleaning body and parallel to the rotary shaft, wherein the first rotary cleaning body is driven to rotate. An electric motor, a control board that controls the electric motor, a suction chamber that supports the first rotating cleaning body, and a second rotation that freely rolls on the surface to be cleaned toward the rear cleaning surface of the first rotating cleaning body. A cleaning body, a suction case disposed above the suction chamber and having a partition wall that divides the electric motor and the control board into a storage chamber; and a suction joint that is rotatably connected to the suction case. The portion connected to the mouthpiece joint in the mouthpiece case A flow path cover for preventing sudden expansion / reduction of the flow path is provided between the storage chamber, the flow path cover is provided with one or more through holes or recesses, and the flow path cover Adjacent and provided with a soft member having a sound absorbing effect so as to close the through hole or the recess.

  ADVANTAGE OF THE INVENTION According to this invention, the suction tool of the vacuum cleaner which reduced the noise which generate | occur | produced in the flow-path part efficiently, and a vacuum cleaner using the same 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 side view of a suction tool is shown, (a) is the state separated from the floor surface, (b) is the state in contact with the floor surface. It is a schematic diagram which shows the flow of the cooling air inside a suction tool. It is sectional drawing which shows the suction tool of the vacuum cleaner which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the suction tool of the vacuum cleaner which concerns on 3rd Embodiment of this invention. The suction tool of the vacuum cleaner which concerns on 4th Embodiment of this invention is shown, (a) is sectional drawing, (b) is a front view of a brush member. The suction tool of the vacuum cleaner which concerns on 5th Embodiment of this invention is shown, (a) is at the time of advance, (b) is at the time of reverse drive. It is CC sectional view taken on the line of FIG. It is sectional drawing of a suction tool.

  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.

One end of the inner tube 5b is inserted into the other end of the outer tube 5a, and is connected so that a ventilation path (not shown) provided on the inner side of the outer tube 5a and the inner tube 5b communicates. It is configured freely. 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, the rotation axis of the first rotary cleaning body 20 to be described later), and a suction joint 13 at the center in the longitudinal direction of the suction body 11. And a connecting portion 12 to be connected. 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. The bumper 11a keeps the airtightness in the mouthpiece main body 11 when used, and the mouthpiece main body 11 collides with furniture or the like when the 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 pipe 14 that is rotatably connected to the connecting portion 12, and a second connecting pipe 15 that is rotatably connected to the first connecting pipe 14. ing.

  The first connecting pipe 14 has a substantially semi-track shape in a top view of FIG. 2 and has a cylindrical shaft 14 a 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 suction body 11. The first connecting pipe 14 is configured to be rotatable from a substantially parallel state to a substantially vertical state (up and down direction) with respect to the floor surface (cleaning surface) M (see FIG. 8B). Has been. That is, the extension pipe 5 is rotated between a state substantially parallel to the floor surface M and a state substantially vertical by rotating the first connection pipe 14 with respect to the suction case 10 with the shaft 14a as a fulcrum. Can do.

  The second connection pipe 15 is configured to be rotatable with respect to the first connection pipe 14 in the longitudinal direction (clockwise and counterclockwise in FIG. 2). Thereby, for example, the extension pipe 5 can be brought down 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.

  The second connection pipe 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.

  Such a suction joint 13 can be operated by tilting the extension pipe 5 in the left-right direction (longitudinal direction) in a state where the extension pipe 5 (see FIG. 1) is substantially perpendicular to the floor surface M, for example. By twisting the tube 4 (grip 4a) in either the left or right direction, the suction body 11 can be rotated approximately 90 degrees in any of the left and right directions, 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 second rotary cleaning bodies 30 and 30. The suction case 10 (suction body 11) is formed with a suction chamber Q 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. Further, the first rotary cleaning body 20 operates so that dust such as a floor surface serving as a cleaning surface is scraped by the second rotary cleaning body 30.

  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 30b having a diameter smaller than the diameter of the first rotary cleaning body 20, is disposed behind the first rotary cleaning body 20, and is arranged in the axial direction of the first rotary cleaning body 20 ( It is arrange | positioned at the one end side and the other end side of the suction mouth main body 11). In other words, the 2nd rotary cleaning body 30 is provided in the both sides on both sides of the connection part 12 to which the suction coupling 13 is connected. For example, the second rotary cleaning body 30 is configured with a diameter that is approximately one half of the diameter of the first rotary cleaning body 20 and a length that is approximately one third of the axial length of the first rotary cleaning body 20. ing.

  Each of the second rotary cleaning bodies 30 has a shaft portion 30a parallel to the rotation shaft 21 of the first rotary cleaning body 20, and the shaft portion 30a is rotatably supported by the suction mouth body 11. Thus, the 2nd rotary cleaning body 30 is not driven with an electric motor, but the structure of the 2nd rotary cleaning body 30 can be simplified by making it support to the suction inlet main body 11 via the axial part 30a.

  The suction case 10 is provided with a brush drive switch 16 on the lower surface of the connection portion 12 of the suction case 10, and a wheel 17 is provided behind the brush drive switch 16 (the rear end of the connection portion 12).

  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 cleaning surface. The brush drive switch 16 includes a wheel 16a, and the wheel 16a is provided so as to always protrude 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 has popped out and is not in contact with the floor M, the driving of the electric motor 40 is stopped by a circuit board 50 (control board) described later. Further, when it is detected that the wheel 16 a is pushed in and is in contact with the floor surface M, the electric motor 40 is driven by the circuit board 50.

  The wheel 17 has the role of improving the operating performance of the suction tool 6 by contacting the bottom surface of the suction tool 6 with the cleaning surface in response to the stress of the forward and backward movement and the rotation operation operated by the operation tube 4. .

  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 a motor 40 that drives the first rotary cleaning body 20 and a circuit board that controls the motor 40 above the first rotary cleaning body 20 and the second rotary cleaning bodies 30 and 30. 50.

  The electric motor 40 is attached to one end side of the suction body 11 in the longitudinal direction. 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 the first end portion (right end portion in the drawing) in the suction mouth body 11 is connected to the first via the toothed belt 40b. It is connected to a rotating shaft 21 (see FIG. 6) of the rotary cleaning body 20.

  The electric motor 40 has a front cap 42 fixed to one end of a stator 41 of the electric motor 40, and a cover member 43 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.

  The front cap 42 is provided with a resilient bushing such as synthetic rubber (not shown), and the lower case 11A (see FIG. 6) and the upper case 11B (see FIG. 6) through the bushing 10 are provided. It has come to be supported between. 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. Further, the circuit board 50 is formed of a rectangular board arranged with the long side facing the longitudinal direction, and is arranged in the mouthpiece body 11 so that the mounting surface 50a faces upward in the vertical direction. The mounting surface 50a is not necessarily limited to the one that faces 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).

  In addition, the connection part 12 has the space Q3 which connects with the space (accommodation chamber Q1) in which the electric motor 40 is accommodated in the area | region containing the bearing part 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 connection pipe 14. A communication hole 12a1 that connects the flow path R and the space Q3 is formed in the wall 12a that partitions the flow path R and the space Q3.

  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.

  In addition, the suction case 10 has a storage chamber Q1 and a suction chamber Q2 in a partition wall 11c that partitions a storage chamber Q1 (see FIG. 6) and a suction chamber Q2 (see FIG. 6) in which the electric motor 40 and the circuit board 50 are stored. Are connected to each other. A plurality of small holes 18 a are formed in the communication portion 18. The communication part 18 is located between the electric motor 40 and the circuit board 50 of the suction body 11 and communicates with the suction chamber Q2.

  Further, the suction case 10 is provided with a flow path cover 100 between the suction joint 14 and the storage chamber Q1 for preventing a sudden expansion or a sudden reduction of the flow path. The flow path cover 100 is composed of two members, and is arranged separately in the vertical direction between the inlet joint 14 and the storage chamber Q1. The flow path cover 100 is provided with a through hole 100a for producing a noise reduction effect. Further, a soft member (sound absorbing material) 101 having a sound absorbing effect is provided so as to be adjacent to the flow path cover 100 and close the through hole 100a.

  The small hole 19 a in the through hole 100 is formed so as to be biased toward the circuit board 50 side from the center in the longitudinal direction of the suction body 11. Further, the communication part 19 in the flow path cover 100 is located in the connection part 12 and communicates with the flow path R (see FIG. 3).

  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. The light guide plate 71 is disposed vertically 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.

  14 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIG. 14, the portion of the light guide plate 71 that can be seen from the suction tool 6 is provided to be inclined with respect to the horizontal direction. This inclination is an inclination that decreases toward the rear part of the suction tool 6. By this inclination, when the user looks at the suction case 10 from the back (when viewed from the rear), the light emitting means 70 can be easily seen without depending on the angle of the suction joint 13.

  Further, the width of the light guide plate 71 is set so that the inlet case 13 is easily viewed when the inlet case 10 is viewed from the back (when viewed from the rear) in a state where the inlet joint 13 is substantially perpendicular to the floor surface M. It may be wider than the width.

  FIG. 15 is a cross-sectional view of the suction tool with the soft member (sound absorbing material) 101 removed. As shown in FIG. 15, the flow path cover 100 includes two members and is arranged separately in the vertical direction.

  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.

  In the present embodiment, since the electric motor 40 is disposed above the rear portion of the first rotary cleaning body 20, the volume of the storage chamber Q1 is larger than that of the conventional one. Similarly, the suction chamber Q2 located on the opposite side of the longitudinal direction from the storage chamber Q1 in the suction body is also enlarged. Therefore, the circuit board 50 accommodated in the suction chamber Q2 can also be made larger than the conventional one. Therefore, the drive circuit of the LED element 73 which has been conventionally separated can be incorporated in the circuit board 50.

  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.

  Note that 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 is disposed and a storage chamber Q1 in which the electric motor 40 is accommodated. The partition wall 11c includes a curved portion 11d formed along the surface of the first rotary cleaning body 20 and a curved portion 11e formed along the surface of the second rotary cleaning body 30. The curved portion 11d and the curved portion 11c are curved. The part 11e is formed continuously. Further, the curved portion 11d extends to a substantially front end portion of the first rotary cleaning body 20 in a sectional view. The curved portion 11e extends to the front side of the rear end portion of the second rotary cleaning body 30 and to the rear side of the shaft portion 30a in a cross-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 communication hole 11g1 is formed below the upper end portion 11a1 of the bumper 11a and the communication hole 11g1 is not blocked by the bumper 11a so that the suction case 10 is viewed from the front ( When viewed from the front, 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. 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.

  The second rotary cleaning body 30 is disposed at a position where the brush 30b having a circular cross section is attached to the shaft portion 30a and does not contact the first rotary cleaning body 20. As described above, the first rotary cleaning body 20 and the second rotary cleaning body 30 are brought close to each other within the range in which the second rotary cleaning body 30 does not come into contact with the first rotary cleaning body 20. It becomes possible to shorten the width.

  In the present embodiment, the case where the brushes 30b are evenly arranged in the entire circumferential direction of the shaft portion 30a has been described as an example. However, the present invention is not limited thereto, and is similar to the first rotary cleaning body 20. The brush may be arranged in a spiral shape. Thereby, the brush 30b can be continuously applied to the cleaning surface as described above, and vibration when the brush 30b rotates can be suppressed.

  The stator 41 of the electric motor 40 has a substantially oval cross section (outline of cross section orthogonal to the output shaft 40a, 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.

Moreover, the electric motor 40 is arrange | positioned so that the front-end part 41s of the electric motor 40 (stator 41) may be located ahead of the rear-end part 20s of the 1st rotation cleaning body 20 in the storage chamber Q1.
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.

  Moreover, the electric motor 40 is arrange | positioned so that the lower end part 41t of the electric motor 40 (stator 41) may be located in the downward direction of the perpendicular direction rather than the upper end part 20t of the 1st rotation cleaning body 20 in the storage chamber Q1. Thereby, the distance of the electric motor 40 which protrudes upward from the upper end part 20t of the 1st rotation cleaning body 20 can be shortened, and height (maximum height) can be made low from the cleaning surface of the suction inlet main body 11. FIG. 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. On the inner periphery of the stator 41, two magnets 45 formed in a field tile shape are fixed with a gap 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 suction body 11 has an outer wall 11h that curves downward and extends downward from the housing chamber Q1 constituted by the lower case 11A and the upper case 11B, behind the first rotary cleaning body 20. . The outer wall 11h extends along the curved surface (surface) of the second rotary cleaning body 30 so that the lower end portion 11h1 of the outer wall 11h is lowered to a substantially height position of the shaft portion 30a of the second rotary cleaning body 30. It extends to.

  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 arranged not on the rear side of the first rotary cleaning body 20 but on the upper side of the upper end portion 20t 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.

  FIG. 8: shows the side view of a suction tool, (a) is the state separated from the floor surface, (b) is the state which is in contact with the floor surface.

  As shown in FIG. 8A, when the suction tool 6 is not in contact with the floor M, the lower end 20 u of the first rotary cleaning body 20 is more than the lower end 30 u of the second rotary cleaning body 30. It is located below the vertical direction. Moreover, the wheel 16a provided in the lower surface of the connection part 12 protrudes, the brush drive switch 16 is turned off, and the operation | movement of the 1st rotary cleaning body 20 stops.

  As shown in FIG. 8B, when the suction tool 6 contacts the floor surface M, the wheel 16a is pushed in, the brush drive switch 16 is turned on, and the first rotary cleaning body 20 is in the W1 direction (counterclockwise in the figure). Direction). At this time, since the brushes 20a, 20b, and 20c in the region in contact with the floor surface M bend, the contact resistance between the brushes 20a, 20b, and 20c and the floor surface M can be sufficiently secured. Dust can be scraped effectively.

  Similarly, when the 2nd rotary cleaning body 30 contacts the floor surface M, the brush 30b of the area | region which contacts the floor surface M bends, and fully ensures the contact resistance of the brush 30b and the floor surface M. be able to.

  The dust scraped by the first rotary cleaning body 20 is carried 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 the extension pipe 5 and the operation pipe 4 And it is attracted | sucked by the dust collection part 2b of the cleaner body 2 through the hose 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).

  Further, as shown in FIG. 8B, when the suction tool 6 moves forward, the second rotary cleaning body 30 rotates in the W2 direction (the counterclockwise direction in the drawing) due to the contact resistance with the floor surface M. At this time, since the second rotary cleaning body 30 is in close contact with the floor M, the static pressure in the suction chamber Q2 can be maintained. Further, when the suction tool 6 moves backward, the second rotary cleaning body 30 rotates in the W3 direction (clockwise direction in the drawing) by the contact resistance with the floor surface M. At this time, since the second rotary cleaning body 30 is in close contact with the floor surface M, dust behind the mouthpiece main body 11 can be sucked. The dust sucked in by the second rotary cleaning body 30 is sent to the flow path R (see FIG. 3) through the suction chamber Q2 (see FIG. 6).

  FIG. 9 is a schematic diagram showing the flow of cooling air inside the suction tool.

  As shown in FIG. 9, 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 pipe 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 of the cleaner body 2, the air E5 sucked from the communication hole 11g2 (see FIG. 7) travels to the other end side (the left side in the drawing) along the wall portion 11m, The circuit board 50 wraps around the circuit board 50 and enters the circuit board 50 through the communication holes 11n formed on the wall and formed on the outside of the circuit board 50. After flowing over the circuit board 50, the communication is performed. It is sucked into the flow path R (see FIG. 3) through the part 19.

  In this way, the electric motor 40 and the circuit board 50 can be cooled by taking the cooling air into the storage chamber Q1. 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 vacuum cleaner 1 of the first embodiment includes the suction chamber Q2 that supports the first rotary cleaning body 20, and the housing that is disposed above the suction chamber Q2 and houses the electric motor 40 and the circuit board 50. A suction case 10 having a partition wall 11c partitioned into a chamber Q1, 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, and the storage chamber Q1 is rotated. The electric motor 40 is arranged on one end side in the axial direction of the shaft 21, and the circuit board 50 is arranged on the other end side. The suction case 10 is disposed behind the first rotary cleaning body 20 from the electric motor 40 and the circuit board 50 to the floor M (cleaning). 11 h (see FIG. 6 and FIG. 7).

As described above, the electric motor 40 and the circuit board 50 are arranged above the first rotary cleaning body 20, the electric motor 40 is arranged on one end side in the axial direction of the rotary shaft 21, and the circuit board 50 is arranged on the other end side. Since the rear of the rotary cleaning body 20 and the second rotary cleaning body 30 can be only the outer wall 11h, the performance of sucking dust from the floor surface M behind the mouthpiece body 11 can be improved.
And since the front-back width D (refer FIG. 2) of the suction inlet main body 11 of the suction inlet case 10 can be shortened, the contact area of the suction suction main body 11 and the floor surface M reduces, and the floor surface M and the suction tool 6 are reduced. Friction is reduced, and user operability (such as being able to operate the suction tool 6 with less force) can be improved.

  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.

  According to the first embodiment, when the suction tool 6 is moved backward by providing the second rotary cleaning body 30 that has an axis parallel to the rotation axis 21 on the outer wall 11h and is in contact with the floor surface M. (When the suction tool 6 is pulled forward), the second rotary cleaning body 30 rotates due to contact resistance with the floor surface M, so that dust behind the suction port body 11 can be sucked into the suction chamber Q2. (See FIGS. 6 and 7).

  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. 10: is sectional drawing which shows the suction tool of the vacuum cleaner which concerns on 2nd Embodiment of this invention. The suction tool 6A (suction case 10A) of the vacuum cleaner 1 according to the second embodiment has a configuration in which the first rotary cleaning body 20 and the second rotary cleaning body 30 are brought into contact with each other. Although not shown in the figure, the circuit board 50 is disposed above the first rotary cleaning body 20 as in the first embodiment (the same applies to the following embodiments). In addition, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted (the same applies to the following embodiments).

  As shown in FIG. 10, the suction tool 6 </ b> A includes the first rotary cleaning body such that the tips of the brushes 20 a, 20 b, and 20 c of the first rotary cleaning body 20 overlap the tips of the brushes 30 b of the second rotary cleaning body 30. 20 and the second rotary cleaning body 30 are positioned.

  Thus, when the first rotary cleaning body 20 is rotated in the W1 direction (counterclockwise direction in the drawing) by driving the electric motor 40, the brushes 20a, 20b, 20c of the first rotary cleaning body 20 and the second rotary cleaning body 30 are rotated. The second rotary cleaning body 30 rotates in the W3 direction (clockwise direction in the drawing) by meshing with the brush 30b.

  According to the second embodiment, when the suction tool 6 is moved backward, the second rotary cleaning body 30 can be rotated in the W3 direction, so that the dust on the floor M behind the suction body 11 can be sucked. it can. Also, when the suction tool 6 is moved forward, the second rotary cleaning body 30 rotates in the W3 direction, so that the dust swept into the suction chamber Q2 by the first rotary cleaning body 20 becomes the second rotary cleaning. It is possible to prevent the body 30 from being swept away from the mouthpiece body 11.

(Third embodiment)
FIG. 11: is sectional drawing which shows the suction tool of the vacuum cleaner which concerns on 3rd Embodiment of this invention. The suction tool 6B of the vacuum cleaner 1 which concerns on 3rd Embodiment is the structure remove | excluding the 2nd rotary cleaning body 30 from the suction tool 6 of 1st Embodiment.

  As shown in FIG. 11, the suction tool 6B is configured such that the front end 41s of the electric motor 40 is positioned in front of the rear end 20s of the first rotary cleaning body 20, and the storage chamber Q1 has an axial direction of the rotary shaft 21. An electric motor 40 is disposed on one end side of the circuit board, and a circuit board 50 is disposed on the other end side. The suction case 10B extends from the electric motor 40 (circuit board 50) toward the floor M behind the first rotary cleaning body 20. 11i.

  According to the third embodiment, since the rear of the first rotary cleaning body 20 can be made only of the outer wall 11i, it is possible to improve the dust suction performance of the floor surface M behind the inlet body 11. Moreover, since the front-rear width D (see FIG. 2) of the mouthpiece body 11 of the mouthpiece case 10B can be shortened, the contact area between the mouthpiece body 11 and the floor surface M is reduced, and the operability of the user (suction tool 6). Can be operated with less force).

(Fourth embodiment)
FIG. 12: shows the suction tool of the vacuum cleaner which concerns on 4th Embodiment of this invention, (a) is sectional drawing, (b) is a front view of a brush member. The suction tool 6C of the vacuum cleaner 1 according to the fourth embodiment has a configuration in which a brush member 80 is added to the suction tool 6B of the third embodiment.

  As illustrated in FIG. 12A, the suction case 10 </ b> C of the suction tool 6 </ b> C has an outer wall 11 j extending from the electric motor 40 (circuit board 50) toward the floor surface M behind the first rotary cleaning body 20. ing. The brush member 80 includes a brush 81 and a base portion 82 on which the brush 81 is provided. The outer wall 11j is formed with an attachment portion 11j1 having a substantially concave shape in section when attaching the brush member 80, and the base portion 82 of the brush member 80 is fixed to the attachment portion 11j1. Moreover, the brush member 80 is arrange | positioned along the other end side from the one end side of the axial direction of the rotating shaft 21 of the 1st rotation cleaning body 20, and when the suction tool 6C is made to contact the floor M, the brush 81 is provided. It is comprised so that the front-end | tip (lower end) may contact the floor surface M. FIG.

  As shown in FIG. 12B, the brush member 80 penetrates in the front-rear direction away from the floor surface M when viewed from the front (when viewed from a direction orthogonal to the axial direction of the rotating shaft 21). A plurality of concave spaces 82a are formed at intervals in the axial direction. In addition, it is preferable to set the opening area of the space 82a to a size that allows solid dust having a large particle shape such as rice grains to pass through.

  According to the fourth embodiment, by providing the brush member 80 on the outer wall 11j, the static pressure in the suction chamber Q2 can be maintained, and dust scraped by the first rotary cleaning body 20 It can be prevented from splashing backward. Further, by providing the space 82a in the brush member 80 (see FIG. 12B), solid dust such as rice grains can be taken into the suction chamber Q2 through the space 82a when the suction tool 6C is moved backward. In contrast to the case where the space 82a is not provided, solid dust can be prevented from remaining in a line along the axial direction (longitudinal direction of the suction body 11) when the suction tool 6C is moved backward.

  In the fourth embodiment, the brush member 80 has been described as an example. However, instead of the brush member 80, a soft thin plate member whose tip (lower end) is in contact with the floor surface M may be used. The soft thin plate member is formed of an elastically deformable material such as synthetic rubber. Further, similarly to the space 82a, the soft thin plate member may be formed with a plurality of concave spaces that are separated from the floor surface M and communicate with the inside and outside of the suction chamber Q2.

(Fifth embodiment)
FIG. 13: shows the suction tool of the vacuum cleaner which concerns on 5th Embodiment of this invention, (a) is at the time of advance, (b) is at the time of reverse drive. The suction tool 6D of the vacuum cleaner 1 according to the fifth embodiment has a configuration in which a rotation shaft 83 and a rotation operation restriction mechanism 84 are added to the brush member 80 of the fourth embodiment.

  As shown in FIG. 13A, the rotation shaft 83 is provided along the rotation shaft 21, and both ends of the rotation shaft 83 rotate into the concave support section 11k formed at the lower end of the outer wall 11j. Supported as possible. The rotation shaft 83 includes a holding portion 83 a that holds the base portion 82 of the brush member 80.

  The rotation operation restricting mechanism 84 includes a protrusion 83b that protrudes upward from the rotation shaft 83, and a restriction piece 11k1 that is formed by hanging from the ceiling surface in the support portion 11k. The restricting piece 11k1 is located in front of the protrusion 83b in the initial position of the brush member 80 shown in FIG. That is, when the protrusion 83b of the brush member 80 is vertically upward, the protrusion 83b and the regulating piece 11k1 are positioned so as to contact each other.

  With this configuration, as shown in FIG. 13A, when the suction tool 6D moves forward, the rotation shaft 83 is rotated counterclockwise by the contact resistance between the brush member 80 and the floor M. A moving force is applied. At this time, the protrusion 83b of the brush member 80 is in contact with the restricting piece 11k1, so that the turning operation of the turning shaft 83 is restricted, and the state shown in FIG. 13A is maintained.

  On the other hand, as shown in FIG. 13 (b), when the suction tool 6D moves backward, a force that rotates the rotation shaft 83 in the clockwise direction acts due to the contact resistance between the brush member 80 and the floor surface M, The protrusion 83b of the brush member 80 is rotated to the opposite side to the regulating piece 11k1, so that the rotation operation of the rotation shaft 83 is allowed, and the brush member 80 is rotated to the first rotary cleaning body 20 side. The rotating operation of the brush member 80 is rotated by the frictional force generated when the dust DS is moved over.

  It should be noted that the angle at which the rotation shaft 83 rotates can be appropriately changed according to the size of the dust DS to be overcome. In addition, the mechanism for restricting the rotation operation of the brush member 80 at the time of forward movement and allowing it at the time of backward movement is not limited to the present embodiment.

  According to the fifth embodiment, when the suction tool 6D moves forward, the rotational movement of the brush member 80 is restricted, and the brush member 80 is in contact with the floor surface M. Therefore, the static pressure can be maintained, and the first It is possible to prevent dust from being scattered rearward of the mouthpiece main body 11 due to the rotation of the rotary cleaning body 20. Further, when the suction tool 6D moves backward, the brush member 80 is allowed to rotate, so that an opening can be made on the floor surface M side behind the mouthpiece body 11, and solid dust on the floor surface behind the mouthpiece body 11 can be opened. Suction is possible.

  The present invention is not limited to the above-described embodiment, and may be configured by appropriately combining the first to fifth embodiments. For example, the structure which arrange | positions the brush member 80 between the 2nd rotation cleaning body 30 and the 2nd rotation cleaning body 30 combining 1st Embodiment and 4th Embodiment may be sufficient.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 2a Electric blower 2b Dust collection part 6,6A, 6B, 6C, 6D Suction tool 10,10A, 10B, 10C, 10D Suction case 11c Partition wall 11h, 11i, 11j Outer wall 11k1 Restriction piece 20 First rotating cleaning body 20s Rear end portion 21 Rotating shaft 30 Second rotating cleaning body 40 Electric motor 40a Output shaft 40s Front end portion 50 Circuit board (circuit board)
80 Brush member 83 Rotating shaft 83b Protruding portion 84 Rotating operation restricting mechanism M Floor surface (cleaning surface)
Q2 suction room Q1 accommodation room_

Claims (3)

An electric blower that generates a suction force, a vacuum cleaner main body having a dust collecting part that collects dust, and a suction tool connected to the vacuum cleaner main body, the suction tool being a rotating shaft parallel to the cleaning surface A first rotary cleaning body having an output shaft that is disposed above (upper rear) of the first rotary cleaning body and that is parallel to the rotary shaft, and that rotates the first rotary cleaning body. A control board that controls the electric motor, a suction chamber that supports the first rotary cleaning body, a second rotary cleaning body that freely rolls on the surface to be cleaned on the rear cleaning surface side of the first rotary cleaning body, A suction case having a partition wall disposed above the suction chamber and partitioning the electric motor and a storage chamber for accommodating the control board; and a suction joint rotatably connected to the suction case;
A flow path cover for preventing a sudden expansion / reduction of the flow path is provided between a portion connected to the suction joint in the suction case and the storage chamber,
The channel cover is provided with one or more through holes or dents,
A vacuum cleaner suction tool comprising a soft member adjacent to the flow path cover and having a sound absorbing effect so as to close the through hole or the recess.   The vacuum cleaner suction tool according to claim 1, wherein the flow path cover includes two upper and lower parts.   An electric blower that generates a suction force, a vacuum cleaner body having a dust collecting part that collects dust, and a suction tool connected to the vacuum cleaner body, wherein the suction tool is any one of claims 1 to 2. The vacuum cleaner which is a suction tool of the vacuum cleaner of Claim 1.