JP4892377B2 - Vacuum cleaner suction and vacuum cleaner - Google Patents

Description

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

  A conventional suction tool for a vacuum cleaner is provided with a single rotating brush that is driven to rotate by an electric motor or the like, and the cleaning piece provided in the longitudinal direction of the outer periphery of the rotating brush is used to scrape dust on the surface to be cleaned. . However, since the surface to be cleaned cannot be sufficiently cleaned with only one rotating brush, an apparatus having two rotating brushes in parallel has been invented. However, if two electric motors are used to rotate each of the two rotating brushes, there is a problem that the vacuum cleaner suction tool becomes heavy and the operability of the vacuum cleaner suction tool is deteriorated.

  Therefore, for example, in the vacuum cleaner suction tool 50 disclosed in Patent Document 1, as shown in FIG. 11, the first rotary brush 53 that is rotationally driven by the electric motor 51 and provided with a cleaning piece 52 on the outer periphery, Similarly, a second rotating brush 55 provided with a cleaning piece 54 on the outer periphery is provided in parallel, and the cleaning piece 52 and the cleaning piece 54 are overlapped with each other, so that the rotational force of the first rotating brush 53 is increased to the second rotating brush. The second rotating brush 55 is rotated by being transmitted to 55.

Further, in the vacuum cleaner suction tool 60 disclosed in Patent Document 2, as shown in FIG. 12, a plurality of rotating brushes 61 and 62 having different rotational directions and rotational speeds are arranged in parallel to the surface to be cleaned. The blades 61b and 62b of the rotating brushes 61 and 62 are attached to the rotating rods 61a and 62a by twisting. In the vacuum cleaner suction tool 60, one end of the first rotating brush 61 is connected to the electric motor 68 through a transmission mechanism including the gear 63 and the pulley 64, the belt 65, and the pulley 66, and the other end. The rotation shaft end 61 c is supported by a bearing 69. One end of the second rotating brush 62 is screwed into the gear 63 via the gear 70, and the other rotating shaft end 62 c is supported by the bearing 69. And the 1st and 2nd rotating brush 61, 62 of the suction tool 60 for vacuum cleaners comprised in this way is rotated in the mutually opposite direction via the gears 63,70.
JP 2003-125991 A Japanese Patent Laid-Open No. 5-111449

  However, in the configuration of the vacuum cleaner suction tool 50 described in Patent Document 1, the cleaning pieces 52 and 54 are overlapped to transmit the rotational force of the first rotary brush 53 to the second rotary brush 55. Since the second rotary brush 55 is rotated, particularly when the surface to be cleaned is a carpet or the like, the cleaning piece 54 is likely to bite into the carpet, and the second rotary brush 55 is difficult to rotate. There was a problem that the rotation could not be obtained and the cleaning performance could not be exhibited sufficiently.

  Further, since the cleaning piece 54 bites into the carpet, a large load is applied to the second rotating brush 55, so that the rotational force of the first rotating brush 53 that rotationally drives it decreases or the first rotating brush 53. An excessive load was also applied to the motor 51 that rotationally drives the motor 51, causing problems such as abnormal heat generation or burning out of the motor 51.

  Further, in the configuration of the vacuum cleaner suction tool 60 described in Patent Document 2, the first and second rotary brushes 61 and 62 are rotated in opposite directions via gears 63 and 70, and thus continuously. However, when the surface to be cleaned is a carpet or the like, the blades 61b and 62b are likely to bite into the carpet and become difficult to rotate, so an excessive load is applied to the gears 63 and 70 and the bearing 69, resulting in wear and tear. There is a problem that it is easy to cause a mechanical failure. In particular, in the case of the vacuum cleaner suction tool 60, the blades 61b and 62b of the first and second rotating brushes 61 and 62 are formed by twisting the rotating rods 61a and 62a. Since an axial load is also applied to 69 and this axial load changes due to a change in the surface to be cleaned, mechanical failure is more likely to occur.

  The present invention solves the above-described conventional problem, and the rotational driving force of the first rotating brush is reliably transmitted to the second rotating brush, and the second rotating brush is continuously and smoothly rotated. An object of the present invention is to provide a vacuum cleaner suction tool and a vacuum cleaner that are excellent in running performance and dust removal performance during forward and backward movement.

  In order to solve the conventional problem, a vacuum cleaner suction tool according to claim 1 of the present invention includes a first rotating brush having a plurality of first cleaning pieces along the longitudinal direction of the peripheral surface, A second rotating brush that is arranged in parallel with the first rotating brush and has a plurality of second cleaning pieces along the longitudinal direction of the peripheral surface; and a drive source that rotationally drives the first rotating brush; An annular or rod-shaped shaft core member of the second rotating brush, and a plurality of holding strips protruding outward from the peripheral surface of the shaft core member, and the plurality of pairs of holding strips A groove for holding the second cleaning piece is formed between the pair of holding strips, and the holding strip of the second rotating brush is formed on the first rotating brush by the driving source. With the rotation drive, the first cleaning piece of the first rotating brush is pressed from the back side in the rotation direction. And it is characterized in that said second rotary brush is rotated by said first rotating brush.

  According to the vacuum cleaner suction tool according to claim 1, the first cleaning piece of the first rotating brush moves from the back side to the holding strip of the second rotating brush as the first rotating brush rotates. By contacting and pressing this, the rotational driving force of the first rotating brush is transmitted to the second rotating brush, so that the second rotating brush can be reliably and continuously rotated. In particular, as compared with the case where the first cleaning piece presses the second cleaning piece of the second rotating brush, the holding strip is a hard one formed on the shaft core material, so that it is reliably rotated. Power will be transmitted.

  A vacuum cleaner suction tool according to a second aspect of the present invention is the vacuum cleaner suction tool according to the first aspect, wherein the vacuum cleaner suction tool is pressed by the first cleaning piece in the holding strip portion of the second rotating brush. The surface to be inclined is in the range of 10 to 60 degrees in the rotational direction side with respect to a straight line passing through the base end portion on the back side and the axial center of the second rotating brush. is there.

  According to the vacuum cleaner suction tool of the second aspect, since the back surface of the holding strip pressed by the first cleaning piece is inclined to the rotation direction side, the first cleaning piece is held by this holding piece. It can contact | abut with the large contact area with respect to the back surface of a strip | belt part, can transmit a rotational driving force reliably, and can rotationally drive a 2nd rotary brush. In particular, if the inclination angle is in the range of 10 to 60 degrees, a large contact area is obtained from the time when the first cleaning piece comes into contact with the back surface of the holding strip, and further during the rotation of the second rotating brush. Since the second rotating brush can be pressed, it is effective in reliably transmitting the rotational driving force.

  The vacuum cleaner suction tool according to claim 3 of the present invention is the vacuum cleaner suction tool according to claim 1 or 2, wherein the length of the first cleaning piece in the first rotating brush is the tip thereof. Is set to a length substantially in contact with the peripheral surface of the shaft core member of the second rotating brush.

  According to the vacuum cleaner suction tool according to the third aspect, the length of the first cleaning piece is set to a length at which the tip of the first cleaning piece is substantially in contact with the peripheral surface of the shaft core member of the second rotating brush. The rotational driving force is reliably transmitted to the second rotating brush without reducing the force with which the first cleaning piece contacts the peripheral surface of the shaft core material of the second rotating brush and presses the holding strip. be able to.

  The vacuum cleaner suction tool according to claim 4 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 3, wherein the length of the second cleaning piece in the second rotary brush is the same as that of the vacuum cleaner suction tool. The tip is set to a length that does not contact the peripheral surface of the shaft core member of the first rotating brush.

  According to the vacuum cleaner suction tool according to claim 4, the length of the second cleaning piece is set to a length that does not contact the peripheral surface of the shaft core material of the first rotating brush. Therefore, the second cleaning piece comes into contact with the peripheral surface of the shaft core material of the first rotating brush and the rotational driving force of the second rotating brush is surely reduced without reducing the rotational driving force of the second rotating brush. Can be transmitted to the rotating brush.

  A vacuum cleaner suction tool according to a fifth aspect of the present invention is the vacuum cleaner suction tool according to any one of the first to fourth aspects, wherein the first rotary brush extends from the axial center of the first rotary brush. The length to the tip of the cleaning piece is set longer than the length from the axial center of the second rotating brush to the tip of the second cleaning piece.

  According to the vacuum cleaner suction tool of claim 5, the length from the axial center of the first rotating brush to the tip of the first cleaning piece is set to the second cleaning piece from the axial center of the second rotating brush. Therefore, the first cleaning piece is securely brought into contact with the holding strip of the second rotating brush, and the second cleaning piece is placed on the axis of the first rotating brush. The rotational driving force of the first rotating brush can be transmitted to the second rotating brush without contacting the material. In addition, since the first rotating brush is strong and deeply in contact with the surface to be cleaned, the first cleaning piece effectively lifts up dust on the surface to be cleaned and rotates the vacuum cleaner suction tool forward. A self-propelled property can be improved by applying a force to the surface to be cleaned.

  The vacuum cleaner suction tool according to claim 6 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 5, wherein the first rotary brush has an annular or rod-shaped shaft core material. A plurality of pairs of ribs protruding outward from the peripheral surface of the shaft core member, and ribs protruding toward the other from the mutually opposing surfaces of the ribs forming the pair, A groove for holding the first cleaning piece is formed between the ribs, and out of the rib ribs located on the back side with respect to the rotation direction of the pair of rib ribs. A support strip that protrudes and supports the first cleaning piece from the back side is provided.

  According to the vacuum cleaner suction tool according to claim 6, out of the rib strips formed on the shaft core material of the first rotary brush, the rib strips located on the back side with respect to the rotation direction are out of the rib strips. A support strip projecting in the direction is provided, and this support strip supports the first cleaning piece from the back side, so the first cleaning piece supports the holding strip of the second rotating brush on the back side. When pressing from the side, it is possible to suppress the first cleaning piece from being bent rearward, and the rotational driving force can be reliably transmitted to the second rotating brush.

  The vacuum cleaner suction tool according to claim 7 of the present invention is the vacuum cleaner suction tool according to claim 6, wherein the first surface of the support strip is opposed to the first cleaning piece. The convex part projected toward the cleaning piece is formed continuously or intermittently along the longitudinal direction of the first rotating brush.

  According to the vacuum cleaner suction tool according to claim 7, in the first rotating brush, because the convex portion is formed continuously or intermittently on the surface of the support strip that faces the first cleaning piece, It is possible to more effectively suppress the first cleaning piece from being bent toward the rear side or the side, and the rotational driving force can be reliably transmitted to the second rotary brush.

  The vacuum cleaner suction tool according to claim 8 of the present invention is the vacuum cleaner suction tool according to claim 6 or 7, wherein the length from the upper surface of the rib portion to the tip of the support strip portion is: Said 1st cleaning piece exists in the range of 0.1 to 0.6 times the length which protrudes from the upper surface of the said rib part.

  According to the vacuum cleaner suction tool according to claim 8, in the first rotating brush, the length from the upper surface of the ridge portion to the tip of the support ridge portion is the length by which the first cleaning piece protrudes from the upper surface of the ridge portion. Since it is set in the range of 0.1 to 0.6 times the length, it is more effective to support the first cleaning piece at an appropriate position corresponding to the rigidity of the cleaning piece and bend backward. The rotational driving force can be reliably transmitted to the second rotating brush.

  The vacuum cleaner which concerns on this invention is equipped with the electric blower and the suction tool for vacuum cleaners of any one of the said Claims 1-8.

  According to the vacuum cleaner suction device configured as described above, the rotational driving force of the first rotating brush is reliably transmitted to the second rotating brush, and the second rotating brush is continuously and smoothly rotated. It is possible to provide a vacuum cleaner capable of performing the above.

  The vacuum cleaner suction tool and vacuum cleaner of the present invention continuously and smoothly rotate the second rotating brush when the first rotating brush is driven to rotate, so that the running performance and dust removal during forward and backward movement are achieved. The performance can be greatly improved.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a best mode for carrying out a vacuum cleaner suction tool according to the present invention will be described with reference to the drawings. It should be understood that the embodiments disclosed below are illustrative in all respects and are not restrictive. The technical scope of the present invention is shown not by the content disclosed in the embodiment but by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the scope of claims. Should be understood.

(Embodiment 1)
A vacuum cleaner suction tool 15 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 is an overall perspective view of a vacuum cleaner to which a vacuum cleaner suction tool according to Embodiment 1 of the present invention is connected.

  As shown in FIG. 1, the electric vacuum cleaner of the present invention is provided with an electric blower chamber 3 containing an electric blower 2 in the rear part of the cleaner main body 1, and is sucked into the front part of the cleaner main body 1. A dust collection chamber (not shown) for collecting dust is detachably accommodated, and a dust collection chamber 4 communicating with the suction side opening of the electric blower 2 is disposed. A pair of traveling wheels 5 are attached to the left and right sides of the rear lower part of the vacuum cleaner body 1 so as to be rotatable with respect to a traveling shaft horizontally disposed. The caster 6 is attached so as to be rotatable around a vertical axis and to be rotatable with respect to a traveling shaft arranged horizontally. A connection joint portion 11 provided at one end of the suction hose 10 is detachably connected to the front surface of the vacuum cleaner main body 1 and an air inlet 7 communicating with the dust collecting chamber 4 is provided.

  The other end of the suction hose 10 is provided with a tip joint portion 12 having a handle 14 having an operation portion 14a for an operator to hold during cleaning and to operate the cleaner body 1. . One end of the proximal side of the extension tube 13 which is configured to be extendable or connectable is detachably connected to the distal end joint portion 12 of the suction hose 10, and the other end on the distal end side of the extension tube 13 is connected to the main end of the suction hose 10. The vacuum cleaner suction tool 15 of the first embodiment is detachably connected.

  A bumper 8 made of an elastic material is extended on the surface from the front part of the vacuum cleaner body 1 to both sides. Even when the vacuum cleaner body 1 collides with furniture, pillars, etc. during the travel of the vacuum cleaner body 1 To avoid scratching. A main body handle 9 provided on the rear upper surface of the vacuum cleaner main body 1 so as to be undulated is gripped when the vacuum cleaner main body 1 is carried.

  Next, the detailed structure of the vacuum cleaner suction tool 15 according to the first embodiment will be described with reference to FIGS. FIG. 2 is an external perspective view of the vacuum cleaner suction tool according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of the vacuum cleaner suction tool viewed from the bottom side. FIG. 5 is a plan view of the vacuum cleaner suction tool as seen from the bottom side, and FIG. 5 is a sectional view of the vacuum cleaner suction tool (as viewed from the left side of the suction tool body). is there. In FIG. 2 and subsequent figures, the direction in which the operator holding the handle 14 pushes forward (advances) the vacuum cleaner suction tool 15 in the traveling direction of the vacuum cleaner suction tool 15 is forward (lower left in FIG. 2). The direction in which the operator pulls back (retracts) the vacuum cleaner suction tool 15 is referred to as the rear (upper right direction in FIG. 2). Further, the right side in the direction in which the vacuum cleaner suction tool 15 is advanced is referred to as the right side (upper left direction in FIG. 2), and the left side is referred to as the left side (lower right direction in FIG. 2).

  As shown in FIG. 2, the main body case 17 of the vacuum cleaner suction tool 15 includes an upper case 17a and a lower case 17b having an opening 18 on the bottom surface. 19 is attached in a tiltable manner, and the distal end of the extension pipe 13 is detachably fitted and fixed to the open end of the connection pipe 19. In addition, a nozzle bumper 20 made of an elastic material such as urethane resin is provided on the outer peripheral surface of the lower case 17b, and functions to alleviate an impact when hitting furniture (not shown).

  Further, as shown in FIG. 3, on the bottom surface of the lower case 17b, a pair of front wheels 21 for traveling near the central left and right ends, and a pair of rear wheels 22 for traveling near the rear left and right ends, respectively, are freely rotatable. Has been attached to. In addition, an undulating safety switch 23 is attached to the rear center of the opening 18 so as to be able to undulate, and the undulating safety switch 23 is in contact with the surface to be cleaned and falls into the attached recess. When a person operates the operation portion 14a, first and second rotary brushes 30 and 35, which will be described later, of the cleaner body 1 are rotated, and the undulating safety switch 23 is separated from the surface to be cleaned from the inside of the recess. In an upright state, the first and second rotating brushes 30 and 35 are configured not to rotate even when the operator operates the operation unit 14a.

  As shown in FIGS. 4 and 5, a rotary brush housing space 18 a as a rotary brush housing space is formed in the front portion of the vacuum cleaner suction tool 15 from the opening 18 toward the upper side of the vacuum cleaner suction tool 15. The rear side of the rotary brush accommodating space 18 a communicates with the connecting pipe 19. The first rotating brush 30 is housed on the front side in the rotating brush housing space 18a, and the second rotating brush 35 is housed on the rear side in parallel with the first rotating brush 30. The vacuum cleaner suction tool 15 is pivotally supported perpendicularly to the advancing / retreating direction. In addition, on the rear side of the rotary brush housing space 18a of the vacuum cleaner suction tool 15, the first rotary brush 30 is placed in the normal rotation direction, that is, in the direction in which the vacuum cleaner suction tool 15 is advanced. An electric motor 24 is housed as a drive source for rotational driving.

  Further, as shown in FIG. 4, a pulley 26 having irregularities formed on the outer peripheral surface is fixed to one end side (left end portion) of the first rotating brush 30, and one end side of the second rotating brush 35 ( A shaft holding member 27a is fixed to the left end). Then, the connecting support member 28 attached so as to rotatably support the rotating shaft (not shown) protruding to the left end side of the pulley 26 is attached to the second rotating brush 35 by the bearing portion 28a on the second rotating brush 35 side. A state in which the fixed shaft core holding member 27a is rotatably supported, and the first rotating brush 30 and the second rotating brush 35 are rotatably held at a predetermined interval by the connecting support member 28. The suction tool main body 16 is fixed at an appropriate position on the left end side of the upper case 17a. In addition, shaft holding members 27b and 27c are fixed to the other end side (right end portion) of the first rotating brush 30 and the other end side (right end portion) of the second rotating brush 35, respectively. The shaft core holding members 27b and 27c are fixed at appropriate positions on the right end side of the upper case 17a of the suction tool main body 16 in a state where the shaft core holding members 27b and 27c are rotatably held with a predetermined interval therebetween.

  The electric motor 24 (shaft 24a) is connected via a belt 25 stretched between a pulley 24b fixed to the shaft 24a of the electric motor 24 and a pulley 26 fixed to the end of the first rotating brush 30. Is transmitted to the first rotating brush 30.

  Next, a detailed configuration of the first and second rotating brushes 30 and 35 in the first embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view of the first and second rotating brushes of the vacuum cleaner suction tool (as viewed from the bottom side when removed from the suction tool body), and FIG. 7 is a first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the first and second rotating brushes of the vacuum cleaner suction tool (when viewed from the left side of the suction tool main body, the downward direction in the figure is the bottom side). In FIG. 6 and subsequent figures, arrows indicate the rotation directions of the first and second rotating brushes 30 and 35.

  In the first embodiment, as shown in FIGS. 3, 4, and 6, the first cleaning piece 31 of the first rotating brush 30 rotates as it approaches the center side in the longitudinal direction (axial direction). The second cleaning piece 36 of the second rotating brush 35 is formed in a substantially V-shape opposite to the first cleaning piece 31. Is formed. Then, as will be described in detail later, the first cleaning piece 31 of the first rotating brush 30 is attached to the outer peripheral surface of the shaft core material 37 of the second rotating brush 35 as the first rotating brush 30 is driven to rotate. The holding strip 37a (see FIG. 7) provided on the back is abutted from the back side, and by pressing this, the rotational driving force of the first rotary brush 30 is transmitted to the second rotary brush 35, and the second The rotary brush 35 is driven to rotate. Moreover, since the rotation of the second rotating brush 35 is performed using the rotational force of the first rotating brush 30 without using a gear or the like, the second rotation is performed when the surface to be cleaned is a carpet or the like. Even if the brush 35 is difficult to rotate, an excessive load is not applied to the parts such as the bearing part 28a and the connection bearing member 29 of the connection support member 28 that supports the second rotation brush 35. It does not cause a failure.

  Furthermore, in the first embodiment, the substantially V-shape of the first cleaning piece 31 and the second cleaning piece 36 is the intermediate point in the longitudinal direction of the first rotating brush 30 and the second rotating brush 35, respectively. It is comprised so that it may become left-right symmetric on both sides. That is, a substantially V-shaped apex is located at the midpoint between the first rotating brush 30 and the second rotating brush 35. And the 1st cleaning piece 31 and the 2nd cleaning which are displaced to the advance angle side as it shifts to the end part side of the 1st rotary brush 30 and the 2nd rotary brush 35 from the peak of this approximately V shape. When the array line of the pieces 36 is developed on a plane, the array line is substantially linear. By configuring the first cleaning piece 31 and the second cleaning piece 36 in this manner, the load balance in the axial direction (thrust direction) is not lost, and the bearing portion (the bearing portion 28a of the connection support member 28 or the connection bearing) is maintained. The load on the bearing portion of the material 29) can be reduced, and the suction portion 15 and the vacuum cleaner suction tool 15 can be configured with a lighter material. Furthermore, the running performance of the vacuum cleaner suction tool 15 can be improved.

  Here, in the first and second rotating brushes 30 and 35 of the first embodiment, the substantially V-shaped apexes of the first and second cleaning pieces 31 and 36 are respectively shown in FIG. Is set at a position that is retreated about 90 ° with respect to the rotation direction from the position on the circumference where both ends of the circle are arranged.

  The first rotary brush 30 is a cylindrical shaft core member 32 that is long in a direction perpendicular to the advancing and retreating direction of the vacuum cleaner suction tool 15 and is set to have substantially the same length as the left-right width dimension of the opening 18. A plurality of first cleaning pieces 31 (three in the first embodiment) that are set to substantially the same length as the shaft core member 32 and are inserted into the shaft core member 32 are provided.

  As shown in FIG. 7, the shaft core member 32 is provided with a plurality of pairs of rib strips 32a projecting outward from the outer peripheral surface thereof, as shown in FIG. A rib portion 32b protruding toward the other side is formed on the opposite surface. As a result, a groove portion 32c having a narrow opening is formed between the pair of rib portions 32a and the flange portion 32b, and the first cleaning piece 31 is inserted into the groove portion 32c. An insertion space 33 is formed.

  The first cleaning piece 31 includes a base end portion 31a and a fibrous portion 31b made of a plurality of fibers raised from the base end portion 31a. And the base end part 31a of this 1st cleaning piece 31 is inserted in the mounting space 33 formed in the axial core material 32, guided and assembled | attached, and the fibrous part 31b of the 1st cleaning piece 31 is the axial center. It protrudes from the ridge portion 32b of the material 32 in the diameter direction. Thus, the 1st cleaning piece 31 is easily assembled | attached to the axial core material 32 of the 1st rotation brush 30 because the base end part 31a is inserted in the installation space 33, and replacement | exchange is required. At this time, it is easily removed from the shaft core member 32 by being extracted from the mounting space 33.

  Further, out of the rib strips 32a forming a pair of shaft core members 32, on the upper surface of the rib strip 32b of the rib strip 32a located on the back side with respect to the rotation direction of the first rotating brush 30, outward A support strip 32d that protrudes toward the front is formed to support the first cleaning piece 31 from the back side. Further, a convex portion 32e protruding toward the first cleaning piece 31 is continuously provided along the longitudinal direction of the first rotating brush 30 on the surface of the support strip 32d facing the first cleaning piece 31 or It is formed intermittently. As a result, when the first cleaning piece 31 is driven to rotate, it is supported from the back side by the support strip 32d and further restrained by the convex part 32e, and is prevented from being bent to the back side or the side. It is possible to effectively scrape dust on the surface to be cleaned and to improve the self-propelled performance by causing the rotational force to advance the vacuum cleaner suction tool 15 to act on the surface to be cleaned.

  Similarly to the first rotating brush 30, the second rotating brush 35 is long in the direction perpendicular to the advancing / retreating direction of the vacuum cleaner suction tool 15, and is approximately the same length as the left-right width dimension of the opening 18. The rod-shaped shaft core material 37 set to the above and the number of the plurality of strips (three strips in the first embodiment) which are set to substantially the same length as the shaft core material 37 and are inserted into the shaft core material 37. 2 cleaning pieces 36.

  As shown in FIG. 7, the shaft core member 37 is provided with a plurality of pairs of holding strips 37a projecting in the diametrical direction from the outer peripheral surface thereof, as shown in FIG. Opposing proximal end portions are notched to form a groove portion 37b having a narrow opening portion, and an insertion space 38 into which the second cleaning piece 36 is inserted is formed in the groove portion 37b. Yes. Further, in the pair of holding strips 37a, the back side surface located on the rear side with respect to the rotation direction of the second rotating brush, that is, the surface pressed by the first cleaning piece 31 is the back side. The shape is set to incline in the range of 10 to 60 degrees (about 45 degrees in the example shown in FIG. 7) on the rotational direction side with respect to a straight line passing through the base end of the second brush and the axis center of the second rotating brush Yes.

  The second cleaning piece 36 includes a base end portion 36a and a fibrous portion 36b made of a plurality of fibers raised from the base end portion 36a. And the base end part 36a of this 2nd cleaning piece 36 is inserted in the mounting space 38 formed in the shaft core material 37, guided, and assembled | attached, and the fibrous part 36b of the 2nd cleaning piece 36 is the shaft core. It protrudes from the groove part 37b of the material 37 in the diameter direction. As described above, the second cleaning piece 36 is easily assembled to the shaft core member 37 of the second rotating brush 35 by inserting the base end portion 36a into the mounting space 38, and needs to be replaced. In some cases, it is easily removed from the shaft core member 37 by being extracted from the mounting space 38.

  In addition, the fibrous part 36b which comprises the 2nd cleaning piece 36 of the 2nd rotary brush 35 is thinned out along the longitudinal direction of the 2nd rotary brush 35, and is intermittently formed as a some fiber bundle. It may be. The plurality of fiber bundles are shifted from each other in the width direction (longitudinal direction of the second rotating brush 35) in the plurality of second cleaning pieces 36, and the raised positions are shifted as a whole. What is necessary is just to comprise so that the full width area of the longitudinal direction of the rotating brush 35 may be covered. Thereby, since the 2nd rotary brush 35 can bend flexibly, the load added to the 2nd rotary brush 35 reduces, and thereby the 1st rotary brush 30 which rotationally drives the 2nd rotary brush 35 is used. The applied load is reduced, the first and second rotating brushes 30 and 35 can be efficiently rotated, and the dust on the surface to be cleaned is efficiently removed by the rotation of the first and second rotating brushes 30 and 35. Since it can be scraped up, the dust removal performance can be greatly improved. The length of the fiber bundle in the longitudinal direction is not limited as long as the plurality of fiber bundles as a whole cover the entire width of the second rotating brush 35 in the longitudinal direction, and is formed in the longitudinal direction. What is necessary is just to set arbitrarily in relation to the number of arrangement | positioning.

  And in the vacuum cleaner suction tool 15 which has the 1st rotating brush 30 and the 2nd rotating brush 35 which were comprised in this way, with the rotational drive of the 1st rotating brush 30 by the electric motor 24 (drive source). The first cleaning piece 31 of the first rotating brush 30 comes into contact with the holding strip portion 37a of the second rotating brush 35 from the back side and presses this, whereby the rotational driving force of the first rotating brush 30 is increased. Since it is transmitted to the second rotating brush 35, the second rotating brush 35 can be reliably rotated. In particular, as compared with the case where the first cleaning piece 31 presses the second cleaning piece 36 of the second rotating brush 35, the holding strip 37a is only a hard one formed on the shaft core member 37. Thus, the rotational driving force is reliably transmitted.

  Particularly, since the back surface of the holding strip 37a pressed by the first cleaning piece 31 is formed to be inclined in the rotational direction, the first cleaning piece 31 is larger than the back surface of the holding strip 37a. It can contact | abut with a contact area, can transmit rotational driving force reliably, and can drive the 2nd rotary brush 35 to rotate. In particular, if the inclination angle is in the range of 10 to 60 degrees, from the time when the first cleaning piece 31 abuts on the back surface of the holding strip 37a, the second rotating brush 35 is further rotated and driven. Since the second rotating brush 35 can be pressed with a large contact area, it is effective in reliably transmitting the rotational driving force to the second rotating brush 35.

  Further, out of the upper surface of the rib strip portion 32a (the strip portion 31b) located on the back side with respect to the rotation direction among the pair of rib strip portions 32a formed on the shaft core member 32 of the first rotating brush 30. A support strip 31d that protrudes in the direction is provided, and the support strip 31d supports the first cleaning piece 31 from the back side, so that the first cleaning piece 31 holds the second rotating brush 35. When the part 37a is pressed from the back side, the first cleaning piece 31 can be prevented from being bent backward, and the rotational driving force of the first rotating brush 30 can be reliably supplied to the second rotating brush 32. Can be communicated to. In particular, the length from the upper surface of the ridge portion 31b to the tip of the support ridge portion 31d is set to a range of 0.1 to 0.6 times the length of the first cleaning piece 31 protruding from the upper surface of the ridge portion 31b. For example, the first cleaning piece 31 can be supported at an appropriate position corresponding to the rigidity of the cleaning piece 32 and can be more effectively suppressed from bending backward, and the rotational driving force can be reliably reduced to the second. This is effective in transmitting to the rotating brush 35.

  Moreover, since the convex part 31e is formed in the surface facing the 1st cleaning piece 31 of the support strip part 31d continuously or intermittently, the 1st cleaning piece 31 is supported and back side or a side side Therefore, it is possible to effectively suppress the bending of the rotation to the second rotating brush 35, and it is effective in reliably transmitting the rotation driving force to the second rotating brush 35.

Further, in the first embodiment, the length of the first cleaning piece 31 is set so that the tip thereof is substantially in contact with the peripheral surface of the shaft core member 37 of the second rotating brush 35. This means that the distance between the axial centers of the first rotating brush 30 and the second rotating brush 35 is G, and the length from the axial center of the first rotating brush 30 to the tip of the first cleaning piece 31 is L1, the length from the axial center of the second rotating brush 35 to the base end of the holding strip 37a (the peripheral surface of the shaft core member 37) L4, the length from the base end to the tip of the holding strip 37a When L5 is
−0.1 ≦ (G−L1−L4) /L5≦0.2
This means that the length of the first cleaning piece 31 is set to a dimension that satisfies the above relationship. Accordingly, the second driving force is reliably reduced without reducing the force with which the first cleaning piece 31 contacts the peripheral surface of the shaft core member 37 of the second rotating brush 35 and presses the holding strip 37a. Can be transmitted to the rotating brush 35.

  The length (L1) from the axial center of the first rotating brush 30 to the tip of the first cleaning piece 31 is the distance (G between the axial centers of the first rotating brush 30 and the second rotating brush 35). ) To the length obtained by subtracting the length (L4) from the axial center of the second rotating brush 35 to the circumferential surface of the shaft core member 37 (ie, L1> G-L4), there is no particular problem. This is because the holding strip portion of the second rotary brush 35 is rotated before the first cleaning piece 31 rotates on a straight line connecting the axis centers of the first rotary brush 30 and the second rotary brush 35. This is because it contacts the back side of 37a and presses the holding strip 37a at an angle inclined along the back side. Even if the length of the first cleaning piece 31 is long (L1> G-L4), if (G-L1-L4) /L5≧−0.1, the first cleaning piece 31 is held by the holding strip 37a. When the first cleaning piece 31 does not contact the peripheral surface of the shaft core member 37 of the second rotating brush 35, the first cleaning piece 31 is larger in this way. The rotational driving force can be reliably transmitted to the second rotating brush 35 by contacting the back surface of the holding strip 37a with the area. The term “substantially contact” is an expression including such a state.

In addition, the length of the second cleaning piece 36 is set to a length that does not contact the peripheral surface of the shaft core member 32 of the first rotating brush 30. This means that the length from the axial center of the second rotating brush 35 to the tip of the second cleaning piece 36 is L2, and the height from the axial center of the first rotating brush 30 to the peripheral surface of the shaft core member 32. Is L3,
L2 <G-L3
This means that the length of the second cleaning piece 36 is set to a dimension that satisfies the above relationship. Thereby, the second cleaning piece 36 comes into contact with the peripheral surface of the shaft core member 32 of the first rotating brush 30 and the rotational driving force of the second rotating brush 35 is not reduced, so that the rotational driving force can be surely obtained. It can be transmitted to the second rotating brush 35.

  Further, in the first embodiment, the length from the axial center of the first rotating brush 30 to the tip of the first cleaning piece 31 is the length of the second cleaning piece 36 from the axial center of the second rotating brush 35. It is set longer than the length to the tip. Thereby, the 1st cleaning piece 31 is made to contact | abut reliably to the holding | maintenance strip part 37a of the 2nd rotating brush 35, and the 2nd cleaning piece 36 is made to contact the axial core material 32 of the 1st rotating brush 30. Instead, the rotational driving force of the first rotating brush 30 can be transmitted to the second rotating brush 35. In addition, since the first rotating brush 30 is in strong and deep contact with the surface to be cleaned, the first cleaning piece 31 effectively scrapes dust on the surface to be cleaned, and the vacuum cleaner suction tool 15 is Self-propelled performance can be improved by applying a forward rotational force to the surface to be cleaned.

  Next, operation | movement and an effect | action of the vacuum cleaner suction tool 15 and the vacuum cleaner (vacuum cleaner main body 1) comprised as mentioned above are demonstrated using FIG.1, FIG.8 and FIG.9. FIG. 8 is a cross-sectional view showing a temporal change in the rotational drive state of the first and second rotary brushes of the vacuum cleaner suction tool according to Embodiment 1 of the present invention (the state seen from the left side of the suction tool body) FIG. 9 is a perspective view of the first and second rotating brushes (as viewed from the bottom side) and a sectional view showing the rotational driving state at each position in the axial direction. It is. In FIG. 8, (a) to (d) show the rotational drive state when the first and second rotary brushes 30 and 35 are rotated by 30 ° over time. FIG. 9A shows the rotational driving state at the right end position of the first and second rotary brushes 30 and 35, and FIG. 9B shows that the longitudinal dimension is shifted from the right end position to the left end side by 1/6. (C) shows the rotational driving state at the position that is shifted from the right end position to the left end side by 1/3 of the longitudinal dimension, and (d) shows the rotational driving state at the intermediate position in the longitudinal direction. Show.

  A power cord (not shown) is pulled out from the vacuum cleaner main body 1, a power plug (not shown) attached to the tip thereof is inserted into a wall outlet, and the operation unit 14 a provided on the handle 14 is operated to operate the electric blower 2 and the vacuum cleaner. When the electric motor 24 built in the vacuum suction tool 15 is energized, the suction force of the electric blower 2 acts on the opening 18 provided in the bottom surface of the lower case 17b of the vacuum cleaner suction tool 15, and covers the floor such as a wooden floor or a carpet. Dust on the cleaning surface is scraped up and sucked by the fibrous portions 31b and 36b of the first and second cleaning pieces 31 and 36, and is carried to the dust collecting chamber 4 through the extension pipe 13 and the suction hose 10. Then, it is collected.

  As described above, in the first and second rotating brushes 30 and 35 of the first embodiment, the substantially V-shaped apexes of the first and second cleaning pieces 31 and 36 are shown in FIG. As shown, it is set at an intermediate position in the longitudinal direction that is retreated about 90 ° with respect to the rotational direction from the position on the circumference where both ends are arranged.

  Then, in a certain part in the longitudinal direction of the first and second rotating brushes 30 and 35, the first cleaning piece 31 is not the first cleaning piece at a certain time (for example, the time zone (a) to (c) in FIG. 8). The holding strip 37 a contacts the holding strip 37 a of the second rotary brush 35, and is pressed from the back side in the rotational direction by the first cleaning piece 31 as the first rotary brush 30 is driven to rotate. Thus, the second rotary brush 35 is driven to rotate by the first rotary brush 30. Then, the state in which the first cleaning piece 31 comes into contact with the holding strip portion 37a of the second rotating brush 35 is finished, and at a certain time (for example, the time zone (d) in FIG. 8), the first cleaning piece 31 is used. 8 and the holding strip 37a are separated from each other, but soon return to the state of (a) in FIG. 8, and the first cleaning piece 31 starts to contact the holding strip 37a. As described above, when a portion in the longitudinal direction is taken, the state in which the first cleaning piece 31 is in contact with the holding strip portion 37a is maintained in a substantially half time zone during one rotation.

  Moreover, the state in which the first cleaning piece 31 is in contact with the holding strip 37a is in any position in the longitudinal direction of the first and second rotating brushes 30 and 35 in FIG. 9 (for example, in FIG. 9). (Positions (d) to (b)). The state where the first cleaning piece 31 is in contact with the holding strip 37a in this way is accompanied by the rotation of the first and second rotary brushes 30 and 35, and the first and second rotary brushes 30 and 35. Is displaced from the outside (left and right end sides) toward the inside (intermediate position side).

  In the vacuum cleaner suction tool 15 having the first rotating brush 30 and the second rotating brush 35 configured as described above, the first rotating brush 30 is driven to rotate by the electric motor 24 (drive source). The first cleaning piece 31 of the first rotating brush 30 is continuously in contact with the holding strip 37a of the second rotating brush 35 from the back side, and the rotational driving force of the first rotating brush 30 is pressed by pressing it. Is transmitted to the second rotating brush 35, so that the second rotating brush 35 can be reliably rotated. In particular, as compared with the case where the first cleaning piece 31 presses the second cleaning piece 36 of the second rotating brush 35, the holding strip 37a is only a hard one formed on the shaft core member 37. Thus, the rotational driving force is reliably transmitted.

  As described above, according to the configuration of the present invention, the dust on the surface to be cleaned and the first rotating brush 30 and the first rotating brush 30 are rotated by the continuous and reliable rotation of the first and second rotating brushes 30 and 35. The dust can be reliably removed without being leaked to the outside by flipping it between the two rotating brushes 35, and the dust removing performance of the vacuum cleaner suction tool 15 can be greatly improved. Moreover, the first and second cleaning pieces 31 and 36 of the first and second rotating brushes 30 and 35 are opened in opposite directions, respectively, and receding with respect to the rotational direction as approaching the central side in the longitudinal direction. Therefore, the dust on the surface to be cleaned can be scraped up to the center side where the dust absorption force is stronger and removed more reliably without leaking to the outside.

  In the first embodiment, the example in which the fibrous portion 36b constituting the second cleaning piece 36 is continuously formed in the entire width region in the longitudinal direction of the second rotating brush 35 is shown. When the fibrous portion 36b is intermittently formed as a plurality of fiber bundles, the number of fibers of the fibrous portion 36b in the second cleaning piece 36 is the number of fibers in the first cleaning piece 31. The number of fibers of the portion 31b is less, and the second cleaning piece 36 is weaker than the first cleaning piece 31 and is easily bent. For this reason, the contact resistance between the second cleaning piece 36 and the surface to be cleaned when rotated is set to be smaller than the contact resistance between the first cleaning piece 31 and the surface to be cleaned. The load applied to the first rotary brush 35 is reduced, thereby reducing the load applied to the first rotary brush 30 that rotationally drives the second rotary brush 35, and the first and second rotary brushes 30 and 35 are efficiently rotated. The dust removal performance can be greatly improved.

  Further, the second cleaning piece 36 of the second rotating brush 35 is weak and easily bent even on the carpet, so that the contact resistance between the second cleaning piece 36 and the surface to be cleaned is the same as that of the first cleaning piece 31. Since it becomes smaller than the contact resistance with the surface to be cleaned, the load applied to the second rotating brush 35 is reduced, thereby reducing the load applied to the first rotating brush 30 for driving the second rotating brush 35 to rotate. And the 2nd rotating brush 30 and 35 can be rotated efficiently, and dust removal performance can be improved significantly.

  In addition, the first rotary brush 30 that is rotationally driven by the electric motor 24 is disposed on the front side, and the second rotary brush 35 is disposed on the rear side, and the first rotary brush 30 is advanced through the suction tool main body 16 during operation. Since the second rotating brush 35 is rotated in the direction opposite to the rotating direction of the first rotating brush 30, the force for moving the vacuum cleaner suction tool 15 in the forward direction is efficiently obtained. And it acts on a to-be-cleaned surface strongly and can operate the vacuum cleaner suction tool 15 lightly even on a carpet.

(Embodiment 2)
A vacuum cleaner suction tool 15 'according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 10 is a cross-sectional view of the vacuum cleaner suction tool according to Embodiment 2 of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the vacuum cleaner suction tool 15 ′ according to the second embodiment, as shown in FIG. 10, a plurality of first cleaning pieces 41 are provided on the first rotating brush 40 from one end side in the longitudinal direction to the other end side. The first cleaning brush 46 is formed in a plurality of second cleaning pieces 46 on the second rotating brush 45, and is formed in a substantially spiral shape that is displaced toward the receding angle side with respect to the rotation direction as approaching to the first rotating brush 40. The holding strip portion of the second rotating brush 45 is formed on the back side by the first cleaning piece 41 as the first rotating brush 40 is driven to rotate. The second rotating brush 45 is smoothly driven to rotate in the direction opposite to that of the first rotating brush 40.

  In addition, in the first and second rotating brushes 40 and 45 of the vacuum cleaner suction tool 15 ′, the points other than the first and second cleaning pieces 41 and 46 being formed in a substantially spiral shape, respectively, This is the same as the first and second cleaning pieces 31 and 36 shown in the first embodiment. That is, the first rotating brush 40 has a shaft core material 42 having a cross-sectional shape similar to that of the shaft core material 32 (however, the rib strip, the ridge, the support strip, etc. are substantially spiral with respect to the axis. And the base end portion of the first cleaning piece 41 is inserted into an insertion space formed between the rib strip and the rib portion, and raised from the base end. A fibrous portion 41b made of a plurality of fibers protrudes outward from the ridge portion. Further, the second rotating brush 45 has a shaft core material 47 having the same cross-sectional shape as the shaft core material 37 (however, the holding strip portion, the groove strip portion and the like are different from the first cleaning piece 41 with respect to the shaft center). And a base end portion of the second cleaning piece 46 is inserted into an insertion space formed in the groove, and raised from the base end portion. A fibrous portion 46b made of a plurality of fibers protrudes outward from the groove.

  Even in the vacuum cleaner suction tool 15 ′ thus configured, when the first rotary brush 40 having the first cleaning piece 41 is driven to rotate, the first cleaning piece 41 is The second rotating brush 45 is made to be the first rotating brush by abutting from the back side on the holding strip formed on the shaft core material 47 of the second rotating brush 45 and pressing the holding strip from the back side. It is smoothly and reliably rotated in the opposite direction to 40. Moreover, when the first cleaning piece 46 is supported from the back side by the support strip and the first cleaning piece 41 presses the holding strip of the second rotating brush 45 from the back side, the first cleaning piece 46 46 is restrained from bending to the back side or the side side, the waist of the second cleaning piece 46 is weak as a whole, and therefore the first and second rotating brushes 40, 45 that are continuous and smooth. , The dust on the surface to be cleaned can be blown between the first rotating brush 40 and the second rotating brush 45, and the dust can be reliably sucked without leaking outside. The dust removal performance of the vacuum cleaner suction tool 15 'can be greatly improved.

  Moreover, the vacuum cleaner main body 1 having the electric blower 2 is connected to the vacuum cleaner suction tools 15 and 15 'having excellent dust removal performance, thereby providing an electric vacuum cleaner having excellent operability and cleaning performance. It goes without saying that it can be done.

(Modification in the above embodiment)
Hereinafter, modifications to the vacuum cleaner suction tools 15 and 15 'exemplified in the first and second embodiments will be described.

(About the shape of the cleaning piece)
In the first embodiment, the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 move toward the rotation direction as they approach the center side in the longitudinal direction. The first cleaning piece 31 and the second cleaning piece 36 may be formed in a substantially U shape, and the second rotating brush 35 is formed in a substantially V shape that is displaced toward the receding angle side. As the first rotating brush 30 is driven to rotate, the holding strip 37a formed in a substantially U shape is continuously formed by the first cleaning piece 31 of the first rotating brush 30 formed in a substantially U shape. Since the second rotary brush 35 is rotationally driven, the same effect as described above can be obtained.

  In the first embodiment, the substantially V-shape of the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 is the first rotating brush, respectively. 30 and the second rotating brush 35 are configured so as to be symmetrical with respect to the intermediate point in the longitudinal direction, but the apex may not be located at the intermediate point in the longitudinal direction (somewhat from the intermediate point). It may not be formed symmetrically with respect to the apex. In short, as long as fluctuations in the load balance in the axial direction can be suppressed, any substantially V-shape may be used, and a substantially U-shape or other shapes may be employed.

  Further, the first cleaning piece 31 and the second cleaning are displaced from the substantially V-shaped apex to the advance angle side as they move to the end portions of the first rotating brush 30 and the second rotating brush 35. When the array line of the pieces 36 is developed on a plane, the array line does not necessarily have to be formed in a straight line, and may be formed in a curved line having an inflection point in the middle. As described above, even in a substantially V shape or a substantially U shape slightly deviating from the array shape shown in the first embodiment, variation in the load balance in the axial direction can be suppressed. The first and second rotating brushes 30 and 35 can be efficiently rotated, and the dust removal performance can be improved. However, in order to obtain the best efficiency and performance improvement, it is desirable to use the arrangement shown in the first embodiment.

  Note that one of the first and second cleaning pieces 31 and 36 may be formed in a substantially V shape, and the other may be formed in a substantially U shape. It may be formed in a substantially V shape or a substantially U shape having a slightly different curvature shape.

  In the first embodiment, the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 move toward the rotation direction as they approach the center side in the longitudinal direction. It is formed in a substantially V shape that is displaced toward the receding angle side, and in Embodiment 2, it is formed in a substantially spiral shape that is displaced toward the receding angle side with respect to the rotational direction as approaching the other end side from one end side in the longitudinal direction. However, in the first rotating brush 30 and the second rotating brush 35 according to the present invention, the cleaning pieces 31 and 36 move toward the receding angle side and / or with respect to the rotation direction as approaching the center side in the longitudinal direction. What is necessary is just to be formed in the shape which changes continuously to the advance angle side. That is, in addition to the substantially V shape, the substantially U shape, and the substantially spiral shape, the shape may be a substantially W shape or a wavy shape, and the shape can be arbitrarily set. By configuring the first rotating brush 30 and the second rotating brush 35 in this way, the holding strip portion 37a of the second rotating brush 35 is pressed from the back side by the first cleaning piece 31, The second rotating brush 35 is smoothly driven to rotate in the direction opposite to that of the first rotating brush 30. Therefore, the dust on the surface to be cleaned is blown between the first rotating brush 30 and the second rotating brush 35 by the continuous and smooth rotation of the first and second rotating brushes 30 and 35, Dust can be reliably removed without leaking outside, and this can greatly improve the dust removal performance of the vacuum cleaner suction tool 15.

  Further, if the first and second cleaning pieces 31 and 36 are formed symmetrically with respect to the intermediate point in the longitudinal direction of the first and second rotating brushes 30 and 35, the first The load (thrust load) applied to the rotary brush 30 and the second rotary brush 35 in the axial direction is not changed, and the load balance is not changed. Therefore, the vacuum cleaner suction tool 15 travels with the dust removal performance. Performance can also be improved.

  Further, when the first and second cleaning pieces 31 and 36 are formed in a shape that continuously changes to the receding angle side and / or the advancing angle side with respect to the rotation direction as approaching the center side in the longitudinal direction. The maximum displacement amount (displacement angle) toward the receding angle side and / or the advancing angle side may be arbitrarily set together with the number of first and second cleaning pieces 31 and 36. The holding strip 37a of the second rotating brush 35 is continuously pressed from the back side by the first cleaning piece 31 so that the second rotating brush 35 is smoothly in the direction opposite to the first rotating brush 30. As long as it is rotationally driven, the maximum displacement amount (displacement angle) toward the receding angle side and / or the advancing angle side in the first and second cleaning pieces 31 and 36 may be set in any manner. .

(About the cross-sectional shape of the shaft core material)
In Embodiments 1 and 2 described above, the shaft core members 32 and 37 of the first rotating brush 30 and the second rotating brush 35 are hollow circular tubes. A tubular thing, a solid section view circular shape or a polygonal rod shape, etc. can be used. Regardless of the tubular shape or the rod shape, grooves similar to the mounting spaces 33 and 38 shown in the first and second embodiments are provided on the surface layer side of the shaft core materials 32 and 37. The first rotary brush 30 and the second rotary brush 35 may be formed by forming along the longitudinal direction and inserting the base end portions 31a and 36a of the cleaning pieces 31 and 36 into the groove portions. . In this case, it is not necessary to form the rib strips 32a and 37a on the shaft core members 32 and 37.

(About the number of strips)
In the first and second embodiments described above, the three first cleaning pieces 31 are inserted into the shaft core material 32 of the first rotary brush 30 and the shaft core material 37 of the second rotary brush 35. The second cleaning pieces 36 are also inserted, but the number of the first cleaning pieces 31 and the second cleaning pieces 36 is not limited to three, but two or four. It may be the above. Depending on the number of strips of the first cleaning piece 31 and the second cleaning piece 36, the rib strips 32a, 37a and the strips of the shaft core members 32, 37 of the first cleaning strip 31 and the second cleaning strip 36 are used. The number and shape of 32b and 37b, or the substantially V-shaped or substantially U-shaped shape of the first cleaning piece 31 and the second cleaning piece 36, that is, the substantially V-shaped or substantially U-shaped shape. The receding angle or the advancing angle (maximum displacement angle) of the vertex is set as appropriate.

(About application of the blade-like part to the first cleaning piece)
In the first and second embodiments described above, the first cleaning piece 31 is configured to include the fibrous portion 31b made of a plurality of fibers raised on the base end portion 31a. Instead of the piece 31, a plate-like blade-like portion extending from the base end portion 31 a, a plate-like blade-like portion extending from the base end portion 31 a, and this blade-like portion It is also possible to use a configuration including a fibrous portion made of a plurality of fibers raised from the fiber. Such a blade-like part is formed of a material having flexibility and shape recovery, and the first cleaning piece having such a blade-like part is simply a first part having a fibrous part 31b. The cleaning piece 31 can be made stronger than the cleaning piece 31, and the self-running property and the dust removal performance of the vacuum cleaner suction tool 15 can be improved.

(About the number of fibers in the fibrous part, thickness, and protrusion margin)
In the first and second embodiments described above, the fibrous portion 36b constituting the second cleaning piece 36 of the second rotating brush 35 is thinned out along the longitudinal direction of the second rotating brush 35, and a plurality of The plurality of fiber bundles 36c are intermittently formed as a fiber bundle 36c, and the raised positions of the second rotary brush 35 are shifted as a whole by shifting the raised positions while overlapping each other in the plurality of second cleaning pieces 36. However, in place of the second cleaning piece 36, the fiber portion 36b of the second cleaning piece 36 is not formed with the fiber bundle 36c, but the fiber bundle 36c is formed. The number of the fibers may be reduced as a whole and less than the number of fibers in the fibrous portion 31b of the first cleaning piece 31. Further, instead of such a second cleaning piece 36, or in addition to the feature of being intermittently formed as a plurality of fiber bundles 36c, the fibers constituting the fibrous portion 36b of the second cleaning piece 36 The thickness may be made thinner than the thickness of the fibers constituting the fibrous portion 31 b of the first cleaning piece 31.

  Further, in the first and second embodiments described above, the protrusion margin of the fibrous portion 36b of the second cleaning piece 36 from the flange-like portion 37b is changed from the flange-like portion 32b of the fibrous portion 31b of the first cleaning piece 31. The protruding margin of the fibrous portion 36b in the second cleaning piece 36 may be set longer than the protruding margin of the fibrous portion 31b in the first cleaning piece 31. Whichever form is adopted, the contact resistance between the second cleaning piece 36 and the surface to be cleaned when driven to rotate is set smaller than the contact resistance between the first cleaning piece 31 and the surface to be cleaned. Thus, the load applied to the second rotating brush 35 is reduced, whereby the load applied to the first rotating brush 30 for rotationally driving the second rotating brush 35 is also reduced, and the first and second rotating brushes 30, 35 are reduced. Can be rotated efficiently, and the dust removal performance can be greatly improved.

(About the arrangement of the first rotating brush)
In the first and second embodiments described above, the first rotating brush 30 that is rotationally driven by the electric motor 24 is disposed on the front side of the rotating brush housing space 18a, and the second rotating brush 35 is disposed behind the rotating brush housing space 18a. However, instead of such an arrangement, the first rotating brush 30 that is rotationally driven by the electric motor 24 is disposed on the rear side of the rotating brush accommodating space 18a, and the second rotating brush 35 is rotated. You may distribute to the front side of the brush accommodating space 18a. When configured in this way, the first rotary brush 30 is driven in reverse rotation during operation, that is, rotated in a direction against the forward movement of the vacuum cleaner suction tools 15 and 15 ′, and the second rotary brush 35 is moved. The first rotating brush 30 is rotated in the direction opposite to the rotating direction. Even in such a case, the first cleaning piece 31 of the first rotating brush 30 is substantially V-shaped or substantially U-displaced toward the receding angle with respect to the rotational direction as approaching the center side in the longitudinal direction. The second cleaning piece 36 of the second rotary brush 35 is formed in a letter shape and is substantially V-shaped or substantially U-shaped opposite to the first cleaning piece 31 of the first rotary brush 30. Shall be formed.

  With the above configuration, when the surface to be cleaned is a carpet, the dust on the carpet is reliably placed between the first rotating brush 30 and the second rotating brush 35 by the first rotating brush 30 that is rotationally driven by the electric motor 24. The second cleaning piece 36 of the second rotating brush 35 is weak at the waist, so that it is easily bent by hitting the carpet surface, and the second rotation. The rotation of the first rotary brush 30 that rotationally drives the brush 35 is not suppressed. When the surface to be cleaned is a wooden floor or the like, since the load received from the surface to be cleaned of the first cleaning piece 31 of the first rotating brush 30 is light, the first rotating brush 30 rotates strongly, Thus, the second rotating brush 35 also rotates efficiently, and the wiping and polishing effect can be exhibited without losing the dust on the surface to be cleaned between the second rotating brush 35 and the first rotating brush 30. .

  As described above, the vacuum cleaner suction tool according to the present invention is one in which the first and second rotating brushes rotate efficiently and has excellent dust removal performance. Can be used for vacuum cleaner.

It is a whole perspective view of the vacuum cleaner which connected the suction tool for vacuum cleaners in Embodiment 1 of this invention. It is an external appearance perspective view of the vacuum cleaner suction tool in Embodiment 1 of this invention. It is the perspective view seen from the bottom face side of the suction tool for cleaners in Embodiment 1 of this invention. It is the top view which removed the lower case of the suction tool for vacuum cleaners in Embodiment 1 of this invention, and was seen from the bottom face side. It is sectional drawing of the suction tool for cleaners in Embodiment 1 of this invention. It is the perspective view (state removed from the suction tool main body) seen from the bottom face side of the 1st and 2nd rotary brush of the suction tool for cleaners in Embodiment 1 of this invention. It is an expanded sectional view of the 1st and 2nd rotating brush of the suction tool for cleaners in Embodiment 1 of this invention. It is sectional drawing which shows the time change of the rotational drive state of the 1st and 2nd rotary brush of the suction tool for cleaners in Embodiment 1 of this invention. It is sectional drawing which shows the rotational drive state in each position of an axial direction with the perspective view of the 1st and 2nd rotating brush of the suction tool for cleaners in Embodiment 1 of this invention. It is the perspective view seen from the bottom face side of the suction tool for cleaners in Embodiment 2 of this invention. It is sectional drawing which shows embodiment with the suction tool for conventional vacuum cleaners. It is sectional drawing which shows other embodiment of the suction tool for conventional vacuum cleaners.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 15 Vacuum cleaner suction tool 16 Suction tool main body 17 Main body case 18 Opening part 18a Rotating brush accommodation space 24 Electric motor (drive source)
30 1st rotary brush 31 1st cleaning piece 31a Base end part 31b Fibrous part 32 Shaft core material 32a Rib strip part 32b Strip part 32c Groove part 32d Support strip part 35 Second rotary brush 36 Second Cleaning piece 36a Base end part 36b Fibrous part 37 Shaft core material 37a Holding strip part 37b Groove part

Claims (9)

A first rotating brush having a plurality of first cleaning pieces along the longitudinal direction of the peripheral surface;
A second rotating brush that is arranged in parallel with the first rotating brush and has a plurality of second cleaning pieces along the longitudinal direction of the peripheral surface;
A drive source for rotating the first rotating brush;
The annular or rod-shaped shaft core member of the second rotating brush forms a pair of a plurality of holding strips protruding outward from the peripheral surface of the shaft core member and the plurality of pairs of holding strips. A groove for holding the second cleaning piece is formed between the holding strips,
The holding strip portion of the second rotating brush is pressed from the back side in the rotational direction by the first cleaning piece of the first rotating brush as the first rotating brush is driven to rotate by the driving source. Thus, the vacuum cleaner suction tool, wherein the second rotary brush is rotationally driven by the first rotary brush.   The surface pressed by the first cleaning piece in the holding strip of the second rotating brush rotates with respect to a straight line passing through the rear end base end and the axial center of the second rotating brush. The suction tool for a vacuum cleaner according to claim 1, wherein the suction tool is inclined in a range of 10 to 60 degrees toward the direction side.   The length of the first cleaning piece in the first rotating brush is set to a length such that the tip thereof is substantially in contact with the peripheral surface of the shaft core material of the second rotating brush. Item 3. A vacuum cleaner suction tool according to item 1 or 2.   The length of the second cleaning piece in the second rotating brush is set to a length that does not contact the peripheral surface of the shaft core material of the first rotating brush. The vacuum cleaner suction tool according to any one of claims 1 to 3.   The length from the axial center of the first rotating brush to the tip of the first cleaning piece is set longer than the length from the axial center of the second rotating brush to the tip of the second cleaning piece. The vacuum cleaner suction tool according to any one of claims 1 to 4, wherein the vacuum cleaner suction tool is provided. The annular or rod-shaped shaft core member of the first rotating brush is opposed to a plurality of pairs of rib strips protruding outward from the peripheral surface of the shaft core member and the rib strips forming the pair. A ridge that protrudes from the surface toward the other, and a groove that holds the first cleaning piece between the ridges;
A supporting strip that protrudes outward from the rib strip located on the back side with respect to the rotation direction among the rib strips forming the pair and supports the first cleaning piece from the back side is provided. The vacuum cleaner suction tool according to any one of claims 1 to 5.   Convex portions protruding toward the first cleaning piece on the surface of the support strip facing the first cleaning piece are continuously or intermittently along the longitudinal direction of the first rotating brush. The vacuum cleaner suction tool according to claim 6, wherein the vacuum cleaner suction tool is formed.   The length from the upper surface of the strip to the tip of the support strip is in the range of 0.1 to 0.6 times the length of the first cleaning piece protruding from the upper surface of the strip. The vacuum cleaner suction tool according to claim 6 or 7.   The electric vacuum cleaner provided with the electric blower and the suction tool for vacuum cleaners of any one of Claims 1-8.

Images