JP2008049072A - Suction portt body and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction port body capable of inhibiting wear of a roller caused by contact with a floor surface. <P>SOLUTION: One end side of a cylindrical flexible roller body 77 of the roller 58 is closed by a closing face 77a, and a gear part 78 is disposed to project in the radial direction on the outer peripheral face of the other end side in the axial direction of the roller body 77. As the space 84 on the gear part 78 side of the roller body 77 is flexibly deformed in the direction of the center axis when the gear part 78 is brought into contact with the floor surface, the wear of the gear part 78 of the roller 58 caused by the contact with the floor surface can be inhibited for a long period of time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a suction port body having detection means for detecting a moving direction of a case body, and a vacuum cleaner including the same.

Conventionally, this type of vacuum cleaner can be connected to a vacuum cleaner main body that houses an electric blower in order to communicate with the suction side of the electric blower, and sequentially connect a hose body, an extension pipe, and a suction port body. This suction port body has a connection pipe part connected to the tip of the extension pipe at the rear part of the suction port body as a horizontally long case body so as to be rotatable. And as such a suction inlet body, what provided the turning wheel which tracks the moving direction of this suction inlet main body, ie, a running direction, in the lower part of the suction inlet main body is known. The swivel wheel includes a main body that is pivotally supported by the suction port main body, and a wheel or roller that is pivotally supported by the main body and is in contact with the floor surface as a surface to be cleaned. Then, when cleaning, the operator places the suction port on the floor, runs the suction port back and forth, and sucks dust on the floor by the negative pressure of the electric blower ( For example, see Patent Document 1.)
JP 2003-342494 A (page 6-8, FIG. 2-3)

  However, the above-described electric vacuum cleaner has a problem that when the suction port body is repeatedly run in the front-rear direction, the roller is easily worn by friction with the floor surface.

  This invention is made | formed in view of such a point, and it aims at providing the suction inlet body which can suppress abrasion of the roller by contact with a to-be-cleaned surface, and a vacuum cleaner provided with the same.

  The present invention includes a swivel unit body that is turnably provided in a case body having a suction port, a swivel unit that includes a wheel that is eccentric with respect to the swivel axis of the swivel unit body and contacts a surface to be cleaned. Detecting means for detecting the moving direction of the case body according to the turning angle of the turning portion, the wheel has flexibility, is formed in a substantially cylindrical shape, one end side in the axial direction is closed, and The wheel body has a wheel body whose other end side in the axial direction is opened, and a contact portion projecting radially on the outer peripheral surface of the wheel body on the side opened in the axial direction.

  According to the present invention, one end side of a flexible wheel main body formed in a substantially cylindrical shape of the wheel of the turning portion is closed, and the outer peripheral surface of the wheel main body on the other end side in the axial direction is contacted. By projecting the part in the radial direction, when the contact part comes into contact with the surface to be cleaned, the contact part side of the wheel body is flexibly deformed in the direction of the central axis. Wear can be suppressed.

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.

  In FIG. 10, reference numeral 1 denotes a vacuum cleaner body, which collects dust sucked together with intake air generated by driving an electric blower 2 housed in a dust collection pack (not shown) that can be attached and detached. Dust.

  The vacuum cleaner main body 1 has a main body suction port 3 for sucking air from the outside. An elongated substantially cylindrical hose body 4 that is flexible and can be bent is connected to the main body suction port 3. At the tip of the hose body 4, a hand operation unit 5 that can select an operation mode of the electric blower 2 is provided. The hand operating section 5 is provided with a gripping portion 6 that is gripped by an operator when cleaning, and projects a plurality of electric blowers 2 and the like in the cleaner body 1. A plurality of setting buttons 7 for setting the operation mode are provided.

  Further, an elongated, substantially cylindrical extension tube 8 that can be extended and retracted is detachably connected to the distal end of the hand operation unit 5. That is, the extension pipe 8 is connected to the suction side of the electric blower 2 through the hose body 4. Further, at the tip of the extension pipe 8, for example, a suction port body 9, which is a floor brush that is placed on a carpet on the floor as an indoor surface to be cleaned and sucks dust on the carpet, is removable. It is connected in communication. Therefore, the suction port body 9 is connected to the suction side of the electric blower 2 through the extension pipe 8, the hose body 4, and the main body suction port 3.

  As shown in FIGS. 7 and 8, the suction port body 9 includes a horizontally long suction port body 11 as a case body and a substantially cylindrical rotation provided rotatably at the rear portion of the suction port body 11. A tube 12 and a connection pipe 13 as a connection tube portion rotatably provided on the rotary tube 12 are provided.

  The suction port body 11 includes a lower case 16 in which a horizontally long suction port 15 is cut out at the front end and the upper side is open, and covers the rear side of the upper portion of the lower case 16. An upper case 17 that rotatably holds 12 and a front cover 19 that is a front cover as a case member that covers the front suction port 18 formed in communication with the suction port 15 in the front portion of the upper case 17 ing. Further, in the suction port body 11, a suction chamber 21 in which the suction port 15 and the front suction port 18 communicate with each other, and a motor chamber 22 provided on one side of the rotary tube 12 at the rear of the suction chamber 21, A drive transmission chamber 23 provided in communication with one side of the motor chamber 22 and a control chamber 24 provided on the other side of the rotary tube 12 at the rear of the suction chamber 21 are partitioned. In the suction chamber 21, a rotary cleaning body 26, which is a rotary brush as a rotary body, is rotatably arranged. In the motor chamber 22, a motor 27 as a drive means for driving the rotary cleaning body 26 to rotate. In the control chamber 24, control means 28 for controlling the driving of the motor 27 is provided.

  Here, as shown in FIGS. 3 and 8, the rotary cleaning body 26 includes a rotary shaft 31 that is a long shaft, a brush base 32 provided around the rotary shaft 31, and the brush base. A plurality of dust scooping members 33 as cleaning members attached to 32 are provided, and bearings 34, 34 as receiving plates are attached to both ends of the rotating shaft 31. These bearings 34 and 34 are pivotally supported by recesses 35 and 35 provided in the lower part of the lower case 16 so as to be rotatable. The dust scooping member 33 is composed of, for example, a soft synthetic resin blade 33a or a belt-like brush bristles 33b, and is spirally rotated in the circumferential direction of the rotary shaft 31 by the brush base 32. It protrudes in the shape of a wall in the radial direction along the axial direction of the shaft 31. Here, for example, the protruding amount of the blade 33a in the radial direction of the rotary cleaning body 26 is set to be smaller than the protruding amount of the brush bristles 33b.

  The recesses 35 and 35 are covered with side covers 36 and 36, respectively. The recesses 35 and 35 communicate with both side portions of the suction chamber 21 through the communication holes 37 and 37. Further, receiving portions 38, 38 that receive the lower portions of both end portions of the rotary cleaning body 26 project into the suction chamber 21 below the communication holes 37, 37.

  The side covers 36, 36 are removed from the lower case 16 when the rotary cleaning body 26 is removed from the suction inlet body 11, and extend from the front end to the rear end along the left and right side edges of the lower case 16. It is formed in a continuous substantially square shape. Each side cover 36 is rotatably provided with a lock portion 36a that allows the side cover 36 to be attached to and detached from the lower case 16, and the suction port body 11 is disposed in front of the lock portion 36a. A groove 36b that communicates the side portion with the suction port 15 is provided along the left-right direction, and wiping members 36c, 36d such as a brushed cloth for wiping off dust on the floor surface are provided at both front and rear ends, respectively. Yes.

  Each lock portion 36a is rotated in one direction along the circumferential direction, whereby the upper end portion is locked to the lower case 16, and this lock is released by rotating in the other direction. Accordingly, each side cover 36 is configured to be locked / released with respect to the lower case 16.

  Further, the motor 27 is disposed along the left-right direction of the suction port body 11, and the motor rotation shaft 27a protrudes into the drive transmission chamber 23, and is connected to the drive transmission chamber 23 through one recess 35. Is connected to the outer surface of the bearing 34 by a belt 39 as drive transmission means. Further, the motor 27 can be driven by power supply from a power supply unit (not shown).

  The control means 28 includes a board 41 on which various elements (not shown) are mounted and a control circuit is formed, and wiring that is electrically connected from the board 41 to the motor 27 and the setting button 7 (FIG. 10). The rotation of the motor 27 can be controlled on and off according to the input signal from the setting button 7.

  In addition, a rotating tube receiving portion 44 that receives the rotating tube 12 protrudes from the central portion of the rear portion of the lower case 16, and a driven wheel 45 is rotatably supported at the tip of the rotating tube receiving portion 44. ing. Further, a safety device 47 as a contact detecting means for detecting contact with the surface to be cleaned of the suction port body 9 is provided at a position below the motor chamber 22 at the rear side of the suction port 15 of the lower case 16. In addition, a swivel wheel 48 as a swivel portion is provided at a position below the control chamber 24.

  The safety device 47 is rotatably supported in the front-rear direction by a device main body 52 fitted in a square hole-shaped mounting hole 51 formed in the lower case 16, and a lower end portion of the device main body 52. And a safety device switch (not shown) disposed in the vicinity of the motor 27 in the motor chamber 22.

  The device main body 52 is provided so as to be movable in the vertical direction, and the safety device switch is turned on and off by this vertical movement.

  In addition, the safety device switch is electrically connected between the motor 27 and the power source unit, and the roller unit 53 protruding downward from the lower case 16 of the suction port body 11 is grounded to the floor surface and the device body unit When 52 is moved upward, it is turned on to allow power supply to the motor 27 from the power supply unit, and when the roller unit 53 is moved away from the floor surface and the apparatus main body unit 52 moves downward, it is turned off from the power supply unit. The power supply to the motor 27 is cut off.

  As shown in FIGS. 1 to 3, 8, and 9, the swivel wheel 48 swivels as a swivel body that is pivotally supported by a circular mounting recess 56 provided in the lower case 16 so as to be able to swivel 360 °. A wheel main body 57 and a roller 58 that is a wheel as a contact member that is pivotally supported by the lower end portion of the swivel wheel main body 57 and rotates in contact with the floor surface.

  The swivel ring main body 57 includes a main body shaft portion 62 inserted through a swivel shaft hole 61 formed in the central portion of the mounting recess 56, and a rotating plate portion 63 provided at the lower end portion of the main body shaft portion 62 and rotating integrally therewith. And a pair of shaft support plate portions 64 and 64 projecting downward from the rotation plate portion 63, and are attached to the lower case 16 via an attachment plate portion 65 that rotatably holds the main body shaft portion 62. It has been.

  The main body shaft portion 62 is integrally provided with a substantially circular cam portion 68 for operating a detecting means 67 for detecting a turning angle of the turning wheel main body 57 at an upper end portion protruding into the control chamber 24.

  Here, the detection means 67 is disposed in the control chamber 24 and has a detection switch 71 as a detection means main body as shown in FIG. 4, and this detection switch 71 has a detection piece portion for setting on / off. As shown in FIG. 3, an arm 72 is extended to the rear of the suction port body 11 (FIG. 3), and a cam portion 68 is provided on a shaft support 73 projecting in an L shape toward the rear at the tip of the arm 72. A detection roller 74, which is a follower node as a detection body that is always in contact with the outer peripheral portion of the motor, is pivotally supported.

  The arm portion 72 is pivotally supported by the detection switch 71 at the base end, and is biased in a direction in which the tip end protrudes toward the cam portion 68, so that the tip end can swing relative to the base end. Yes.

  On the other hand, the cam portion 68 is a substantially disc-shaped eccentric cam that is eccentric with respect to the central axis of the turning wheel main body 57 that is the turning shaft of the main body shaft portion 62. That is, the cam portion 68 has a first region 75 with a relatively small amount of protrusion in the radial direction and a second region 76 with a relatively large amount of protrusion in the radial direction with respect to the main body shaft portion 62. is doing.

  The first region 75 is a region in which the arm portion 72 is separated from the detection switch 71 side and the detection switch 71 is set to an off state, whereby the traveling direction of the suction port body 11 is detected as the forward direction. The center angle with respect to the center of the planar view is a semicircular region in which the center angle with respect to the center of the cam portion 68 in the plan view is approximately 180 °.

  The second area 76 is an area in which the arm 72 is pushed toward the detection switch 71 via the detection roller 74 and the detection switch 71 is turned on to detect the traveling direction of the suction port body 11 as the reverse direction. A semicircular region in which the central angle with respect to the center of the cam portion 68 in plan view is 360 ° with the central angle of the first region 75, that is, approximately 180 ° in the present embodiment. It is.

  Then, when the detection roller 74 of the detection means 67 is brought into rolling contact along the outer periphery of each of the regions 75 and 76, the amount of protrusion of the arm portion 72 with respect to the detection switch 71 changes, so that the detection means 67 makes a turning wheel The turning angle of the 48 turning wheel main bodies 57 is detected, and the detection result is output to the control means 28.

  Each shaft support plate portion 64 is inclined at the tip side to a position eccentric in the radial direction of the main body shaft portion 62 with respect to the swivel axis A of the swivel ring main body 57 that is the central axis of the main body shaft portion 62. The two sides of the roller 58 are pivotally supported at a position substantially overlapping with the peripheral edge portion of the turning shaft hole 61 in plan view. The eccentric direction of each shaft support plate portion 64 is set so as to have a predetermined correspondence with the eccentric direction of the cam portion 68, and in this embodiment, the eccentric direction of the cam portion 68 is the same direction. Eccentric.

  Therefore, the roller 58 is pivotally supported at a position eccentric with respect to the turning axis A of the turning wheel body 57, and the turning wheel body 57 of the turning wheel 48 is sucked into the suction port by contact resistance with the floor surface. 9 is configured to be able to turn so that the roller 58 follows to the rear side in the traveling direction, which is the moving direction of N.

  Here, the roller 58 includes a roller body 77 as a wheel body formed in a substantially cylindrical shape by a flexible member such as rubber or elastomer, and a plurality of rollers 58 are provided on the outer peripheral surface of the roller body 77. A gear portion 78 as a contact portion protrudes, and inside the roller body 77, a cylindrical shaft support portion 79 that is supported by the swivel ring body 57 by the shaft support plate portion 64 is integrally provided. A plurality of rib portions 80 are continuously provided between the periphery of the shaft support portion 79 and the roller body 77.

  As shown in FIG. 1 (b), the roller body 77 is closed at one end side in the axial direction by a closing surface 77a, and at the other end side in the axial direction as shown in FIG. 1 (a). An opening 77b is formed.

  The gear portion 78 has a rib shape along the axial direction of the roller body 77 and the radial direction over the outer peripheral surface on the other end side in the axial direction of the roller main body 77, that is, the entire outer peripheral surface on the opening 77b side. Is provided to protrude. And this gear part 78 is a part which contacts a floor surface in the state which mounted the suction inlet 9 on the floor surface. Therefore, the roller body 77 side is configured so as to hardly contact the floor surface.

  The shaft support 79 has an end surface on the opening 77b side, and a shaft support member 81 is coaxially fitted therein.

  The shaft support member 81 is formed in a substantially cylindrical shape by a member harder than the roller body 77, such as a synthetic resin, for example, and an insertion hole through which the roller shaft 82 whose both ends are supported by the shaft support plate portion 64 is inserted. 81a is formed at the center. In addition, a plurality of engaging portions 81b that respectively engage with a plurality of engaging claw portions 79a provided on the inner peripheral portion of the shaft support portion 79 protrude from the outer peripheral portion of the shaft support member 81 in the circumferential direction. The shaft support member 81 is prevented from rotating with respect to the shaft support portion 79 by the engagement between the engagement claw portion 79a and the engagement portion 81b. Further, both end portions of the shaft support member 81 slightly protrude from both end surfaces of the roller body 77.

  It should be noted that the shaft support position of the shaft support member 81 on the roller shaft 82 is that if the distance from the swivel axis A of the swivel wheel main body 57 is far, the swivel wheel 48 is easy to turn, but if the distance is too long. Since there exists a possibility of causing the enlargement of the suction inlet main body 9, it sets suitably considering those balances.

  Further, the rib portion 80 is formed linearly along a substantially tangential direction with respect to the shaft support portion 79, and an opening 77b is formed between the inner peripheral surface of the roller body 77 and the outer peripheral surface of the shaft support portion 79. A space 84 that communicates with each other is defined.

  The upper case 17 covers the upper portions of the motor chamber 22 and the control chamber 24.

  As shown in FIGS. 3, 5, and 6, the front cover 19 includes a horizontally long upper front cover 85 having a circular arc shape as a first cover, and a hinge 86 at the lower portion of the upper front cover 85. It has a horizontally long lower front cover 87 as a second cover that is rotatably connected in the front-rear direction, and is provided so as to be able to rotate in the front-rear direction covering the suction chamber 21 from the upper side to the front side.

  The upper front cover 85 has support side walls 88 and 88 projecting downward from both ends in the longitudinal direction, which are support arms as connection protrusions. Each support side wall 88 is formed with a substantially circular engagement notch 89 as a connecting portion, and each engagement notch 89 is supported by a support space 88 as a mounting opening provided in the rear portion. Communicates with the outside. Further, the upper front cover 85 is provided with a cover torsion spring (not shown) as case member urging means between the rotation restriction step surface S of the lower case 16 constituting the rear upper side of the suction chamber 21 and moves forward. It is energized.

  The engagement notch 89 is formed so as to be fitted at a position between the end of the rotary shaft 31 of the rotary cleaning body 26 and the bearing 34 via the attachment / detachment space 90. Accordingly, the engagement notch 89 has an inner diameter dimension slightly larger than the diameter dimension of the rotating shaft 31, and the attaching / detaching space 90 is set to a space slightly smaller than the diameter dimension of the rotating shaft 31, and this attaching / detaching space is set. 90 is configured to prevent the rotation shaft 31 inserted into the engagement notch 89 from being detached.

  The hinge 86 is provided with a plurality of protrusions 91 protruding in the longitudinal direction, that is, in the left-right direction from the lower end portion of the upper front cover 85, and a plurality of protrusions being spaced apart in the longitudinal direction from the upper end portion of the lower front cover 87. The protrusions 92 are fitted with each other, and a support shaft 93 is disposed through the protrusions 91 and 92. The support shaft 93 is provided with a torsion spring 94 as a rotation urging means, and the torsion spring 94 is configured to urge the lower front cover 87 forward with respect to the upper front cover 85. ing.

  The lower front cover 87 has a flexible cover 96 protruding from the lower end portion. The flexible cover 96 is provided with a plurality of slits 97 at the lower end and is divided in the left-right direction.

  The rotary tube 12 is disposed along the front-rear direction, and a suction air path 99 that is formed in a front-side opening shape and communicates with the rear portion of the suction chamber 21 is connected to the front end portion. The rotary tube 12 is sandwiched between the lower case 16 and the upper case 17 so as to be rotatable in the circumferential direction.

  The connection pipe 13 is provided so as to be rotatable in the front-rear direction, which is a direction orthogonal to the rotation direction of the rotary tube 12.

  Next, the operation of the above embodiment will be described.

  First, the operator sequentially connects the hose body 4, the extension pipe 8, and the suction port body 9 to the main body suction port 3 of the cleaner body 1.

  Further, when the operator pulls out the power cord from the cleaner body 1 and connects it to an outlet (not shown), and then operates the predetermined setting button 7 by holding the holding portion 6, the operation mode set by the setting button 7 is set. Accordingly, the electric blower 2 is driven.

  Then, the operator grips the grip portion 6 and moves the suction port body 9 back and forth on the floor as shown in FIG. 9, sucks dust together with air from the suction port 15, and extends the extension pipe 8 and the hose body 4. Then, the dust is carried from the main body suction port 3 to the dust collecting pack and collected.

  Here, in the swivel wheel 48, the gear portion 78 of the roller 58 that is eccentric with respect to the swivel axis A of the swivel wheel main body 57 is grounded to the floor surface, and the suction port of the suction port body 9 due to contact resistance with the floor surface or the like. It turns to follow the traveling direction of the main body 11.

  At this time, in the roller 58, the gear portion 78 side of the space portion 84 on the floor surface side of the roller main body 77 is flexibly deformed in the central axis direction due to the weight of the suction port body 9, and the like. Reduces friction. The flexible deformation of the space portion 84 is restored by the action of the rib portion 80 when the space portion 84 is separated from the floor surface by the rotation of the roller 58.

  As the turning wheel 48 turns, the cam portion 68 rotates eccentrically with respect to the main body shaft portion 62, so that the detection roller 74 that is in rolling contact with the outer peripheral portion of the cam portion 68 is moved to the outer peripheral portion of the cam portion 68. The front end side of the arm portion 72 is swung according to the uneven shape, and the detection switch 71 is turned on / off according to the uneven shape of the cam portion 68.

  That is, when the detection roller 74 is in rolling contact with the outer peripheral portion of the first region 75 of the cam portion 68, the arm portion 72 is not pushed into the detection switch 71 side, and is applied to the detection switch 71 by the urging force. In this embodiment, the detection switch 71 is turned off, the control means 28 determines that the suction port body 11 is moving forward, and the detection roller 74 is connected to the cam portion. In the case of rolling contact along the outer peripheral portion of the second region 76 of 68, the arm portion 72 is pushed against the urging force, the detection switch 71 is turned on, and the suction port body 11 is turned on by the control means 28. Is determined to be moving backwards.

  As a result, the detection switch 71 is turned on / off corresponding to the traveling direction of the suction port body 9, and this on / off detection result is output to the control means 28.

  The control means 28 to which the on / off detection result is input controls the power supplied to the motor 27 and the driving force of the motor 27 is transmitted via the belt 39, whereby the rotary cleaning body 26 rotates.

  In this rotation, for example, the rotary cleaning body 26 is rotated in the reverse direction, that is, along the direction opposite to the traveling direction of the suction port body 11, or is rotated in the forward direction, that is, along the traveling direction of the suction port body 11. .

  In other words, when the rotary cleaning body 26 is rotated in the direction opposite to the traveling direction of the suction inlet body 11, when the detection switch 71 is in the off state, the rotary cleaning body 26 is rotated backward to detect the detection switch 71. When 71 is on, the rotary cleaning body 26 is rotated forward. Further, when rotating in the forward direction, when the detection switch 71 is in the off state, the rotary cleaning body 26 is rotated forward, and when the detection switch 71 is in the on state, the rotary cleaning body is moved backward. Rotate to.

  As described above, according to the above embodiment, one end side of the flexible roller body 77 formed in the substantially cylindrical shape of the roller 58 is closed by the closing surface 77a, and the roller body 77 is opened. By projecting a plurality of gear portions 78 radially on the outer peripheral surface on the other end side in the axial direction, when these gear portions 78 come into contact with the floor surface, a space portion 84 on the gear portion 78 side of the roller body 77 is provided. Is flexibly deformed in the direction of the central axis, so that wear of the gear portion 78 due to contact with the floor surface can be suppressed over a long period of time.

  Therefore, even when the suction port body 9 is used for a long period of time, the gear portion 78 is surely brought into contact with the floor surface, and the turning wheel 48 is reliably turned by this contact. By turning on / off, it is possible to reliably detect the change of the traveling direction of the suction inlet body 11.

  In addition, since the gear portion 78 is located on the opening 77b side of the roller body 77, the gear portion 78 side of the roller body 77 is easily deformed flexibly due to vibration caused by running of the suction port body 9, etc. Due to the deformation, the vibration can be absorbed reliably, and the suction port body 9 can be stably driven.

  Further, by providing the rib portion 80 continuously from the shaft support portion 79 provided coaxially inside the roller main body 77 to the inner peripheral surface of the roller main body 77, the gear portion 78 and the floor surface are flexibly deformed. When the space portion 84 is separated from the floor surface side, it can be reliably restored and deformed by the rigidity of the rib portion 80, and the gear portion 78 side of the roller body 77 can be prevented from being flexibly deformed more than necessary.

  In addition, since these rib portions 80 are provided along the substantially tangential direction with respect to the shaft support portion 79, for example, compared to the case where the rib portions are provided radially from the shaft support portion, these rib portions 80 are provided. Therefore, the absorbability of the impact when the roller 58 comes into contact with the floor surface or the like is improved, and the flexible deformation of the roller body 77 is easily restored.

  Further, since the arm portion 72 of the detection switch 71 protrudes in an inclined manner with respect to the cam portion 68, there are cases where it is easy to swing or difficult to swing depending on the rotation direction of the cam portion 68. . For this reason, when the traveling direction of the suction port body 11 is switched by shifting the gear part 78 to the other end side in the axial direction with respect to the roller body 77, the turning wheel 48 is rotated in a predetermined direction. The rotation direction is set to be a direction in which the arm portion 72 easily swings, so that the on / off of the detection switch 71 can be reliably switched by turning the turning wheel 48.

  Moreover, since the gear part 78 is formed on a part of the outer peripheral surface of the roller body 77, the contact mark between the roller 58 and the floor surface is wider than when the entire outer peripheral surface of the roller body 77 is in contact with the floor surface. It becomes narrow and this contact mark is hard to remain.

  Further, by attaching the shaft support member 81 that is harder than the roller body 77 in the roller body 77 in a coaxial manner, the roller body 77 is easily deformed flexibly and wear on the roller shaft 82 can be suppressed.

  Further, by making the contact portions into a plurality of gear portions 78 projecting in a gear shape, even if the roller main body 77 is flexibly deformed, the gear portion 78 reliably bites against the floor surface, and the swivel wheel 48 is reliably secured. Can be swiveled.

  Further, in order to detect the turning angle of the turning wheel 48 based on the shape of the cam part 68 and the on / off of the detection switch 71 due to the rolling contact of the detection roller 74 to the outer periphery of the cam part 68, a plurality of sensors are connected to the turning wheel 48. Unlike the case where the turning angle of the turning wheel 48 is detected by these sensors arranged around the detector, the detecting means 67 can continuously cope with any turning angle of 360 °.

  And the convenience of a vacuum cleaner can be improved by providing such a suction inlet 9.

  In the above embodiment, the detection switch 71 may be turned on and off in reverse, that is, turned on when the arm portion 72 is projected and turned off when the arm portion 72 is pushed. By making various circuits such as the control means 28 correspond to each other, it can be configured in the same manner as in the above embodiments.

  Further, in the suction port main body 11, the configuration around the front cover 19 including the front suction port 18 is not limited to the above configuration. For example, the suction port body 9 in which the front suction port 18 and the front cover 19 are not provided. However, similar effects can be achieved.

  Furthermore, the contact portion can have any shape other than the gear portion 78.

  If the traveling direction of the suction port body 11 can be detected according to the turning angle of the swivel wheel 48 corresponding to this traveling direction, the configurations and shapes of the detection means 67 and the cam portion 68 are limited to the above configurations. is not.

  The details of the vacuum cleaner are not limited to the above-described configuration, and the vacuum cleaner is not limited to the canister type, and may be, for example, a self-propelled vacuum cleaner. However, even an upright type or a handy type directly formed on the lower surface of the cleaner body 1 can be used correspondingly.

(a) is a perspective view which shows the wheel of the turning part of the suction inlet body of one embodiment of this invention from one end side, (b) is a perspective view which shows a wheel same as the above from the other end side. It is a side view which shows a turning part same as the above. It is side surface sectional drawing which shows a suction inlet same as the above. It is explanatory drawing which shows the vicinity of the detection means of a suction inlet same as the above. It is a perspective view which shows the case member of a suction opening body same as the above from the back surface. It is a perspective view which shows the state which removed the case member and rotary cleaning body of the suction opening body same as the above. It is a perspective view which shows the state which removed the upper case, the case member, and the rotation cleaning body of the same suction opening body. It is a top view which shows a suction port body same as the above from the bottom side. It is a top view which shows the movement at the time of cleaning of a suction inlet same as the above. It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above.

Explanation of symbols

1 Vacuum Cleaner Body 2 Electric Blower 9 Suction Port
11 Suction port body as a case body
15 Suction port
48 Turning wheel as turning part
57 Swivel wheel body as swivel body
58 Roller as a wheel
67 Detection means
77 Roller body as a wheel body
78 Gear part as contact part
79 Shaft support
80 Rib part A Rotating axis

Claims (4)

A case body having a suction port;
A swivel unit main body provided so as to be capable of swiveling in the case body, and a swivel unit including a wheel that is eccentric with respect to the swivel axis of the swivel unit main body and contacts a surface to be cleaned;
Detecting means for detecting the moving direction of the case body according to the turning angle of the turning portion;
The wheel is
A wheel body having flexibility, formed in a substantially cylindrical shape, closed at one end in the axial direction, and opened at the other end in the axial direction;
A suction port body having a contact portion projecting in a radial direction on an outer peripheral surface of the open side of the wheel body in the axial direction. Wheels
A shaft support provided coaxially inside the wheel body and supported by the body;
The suction port body according to claim 1, further comprising a rib portion provided continuously from the shaft support portion to the inner peripheral surface of the wheel main body. The suction port body according to claim 1, wherein a plurality of contact portions are provided to protrude on the outer peripheral surface of the wheel body. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising the suction port body according to any one of claims 1 to 3, which is connectable to the vacuum cleaner body so as to communicate with the suction side of the electric blower.

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