JP2006204781A - Vacuum cleaner and its suction port body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor brush for a vacuum cleaner improving a dust sucking efficiency. <P>SOLUTION: A suction groove 54 communicating with the suction port 24 is provided on the side of a suction chamber 25 communicating with a suction port 24 and below a driving chamber 28 storing a transmission part 27b of the driving part 27. The width of an air duct reaching the suction port 24 is secured in a case body 11, the lower part of the driving chamber 28 is effectively used by the suction groove 54, and dust scraped by a rotary brush 21 from a floor face is surely sucked by the suction port 24 via the suction groove 54 to improve the sucking efficiency. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner provided with a drive unit having a fan that can be rotated by intake air from an intake port, and an intake port body thereof.

2. Description of the Related Art Conventionally, floor brushes used in vacuum cleaners are known in which a flat air turbine is rotated by intake air sucked from an intake port and the rotating brush is rotated by this rotation. Such a floor brush is provided with a horizontally long case body having an intake port on the upper side. In the case body, a rotary cleaning body chamber for housing the rotating brush is defined on the front side, a suction chamber having a suction port at the bottom is defined on the rear side of the rotary cleaning body chamber, and an air turbine is provided. A drive chamber that is accommodated and communicated with the intake port is defined on the upper rear side of the rotary cleaning body chamber (see, for example, Patent Document 1).
JP-A-9-248260 (page 3, FIG. 1)

  In the above-described floor brush, the rotary cleaning body chamber and the suction chamber are preferably provided adjacent to each other in order to prevent the dust brushed up from the floor surface from reattaching to the floor surface, Similarly, the drive chamber and the rotary cleaning body chamber are preferably provided adjacent to each other in order to make the case body compact.

  For this reason, in the floor brush as described above, the suction chamber and the drive chamber are juxtaposed in the width direction of the case body. On the other hand, since it is not desired to suck dust into the driving chamber in order to protect the air turbine or the like, a suction port cannot be provided in the driving chamber.

  As a result, the above-described floor brush has a problem that the width of the air passage leading to the suction port becomes narrow, and it becomes difficult to suck in the dust that is swung up by the rotary brush.

  In particular, when cleaning an obstacle, it is not easy to suck dust from the suction port on the surface to be cleaned closer to the obstacle than the position where the other side of the case body collides with the obstacle.

  This invention is made | formed in view of such a point, and it aims at providing the vacuum cleaner which improved dust suction efficiency, and its suction inlet.

  The present invention is driven by a suction port facing the cleaning surface, a suction port positioned above the suction port, a drive unit having a fan that can be rotated by intake air from the suction port, and the drive unit. A rotary cleaning body chamber having a rotary cleaning body in a lower part facing the surface to be cleaned, a suction chamber provided at the rear of the rotary cleaning body chamber and communicating with the suction port; A drive chamber that houses at least a portion of the drive section on the side of the suction chamber, and an air passage that is formed at least partially in the lower portion of the drive chamber and communicates with the suction port and is open at the bottom. It is.

  According to the present invention, by forming an air passage that communicates with the suction port and is opened at the lower part of the drive chamber that houses at least a part of the drive unit on the side of the suction chamber that communicates with the suction port. The width of the air path leading to the suction port is secured in the case body, and the dust cleaned by the rotary cleaning body from the surface to be cleaned can be reliably sucked into the suction port through the air path, improving the dust suction efficiency. .

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  In FIG. 5, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 collects dust sucked together with intake air generated by driving an electric blower 2 accommodated 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 the electric blower 2 in the cleaner body 1 in a plurality of drive modes. A plurality of setting buttons 7 for setting are provided.

  Further, an elongated and substantially cylindrical extension tube 8 that can be extended and retracted is detachably connected to the distal end of the hand operation unit 5. Furthermore, a floor brush 9 serving as a suction port for sucking dust on the carpet is detachably connected to the tip of the extension pipe 8, for example, placed on a carpet on the floor of the room. ing.

  As shown in FIGS. 1 and 5, the floor brush 9 is supported by a horizontally long case body 11 and a rear portion of the case body 11 so as to be rotatable in the circumferential direction and the vertical direction with respect to the case body 11. A downstream side as a rear end portion is provided with a connecting pipe portion 12 connected to the extension pipe 8 in communication. That is, the floor brush 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. 1 to 3, the case body 11 includes a lower case 15 whose upper side is opened, an upper case 16 that closes the upper side of the lower case 15, and a case body 11 that is attached between the cases 15 and 16. A case 17, a front cover 18 provided on the front side of the upper case 16, and a bumper 19 sandwiched between the cases 15 and 16 and extending from both sides of the front cover 18 to both sides of the case body 11. ing.

  Further, in the case body 11, the lower case 15, the upper case 16, the middle case 17 and the front cover 18 can rotate the rotary brush 21 as a rotary cleaning body to the lower part facing the floor surface F as a surface to be cleaned. The rotary cleaning body chamber 22 accommodated in the front is defined by a front end, and on the right side shown in FIG. A rectangular suction port 24 is formed in the lower end portion, a suction chamber 25 communicating with the upstream side of the connecting pipe portion 12 is formed, and a drive for rotating the rotary brush 21 behind the rotary cleaning body chamber 22 is driven. A side transmission chamber in which a drive chamber 28 containing a portion 27 is formed in an airtight manner with respect to the suction chamber 25, and further, one end of the rotary brush 21 is inserted on the left side of the rotary cleaning body chamber 22 shown in FIG. 29 is partitioned.

  Here, the drive unit 27 includes an air turbine 27a as a fan and a transmission unit 27b that transmits the rotation of the air turbine 27a to the rotating brush 21.

  The lower case 15 forms the lower part of the case body 11, and is provided on the right side of the lower case body 31 shown in FIG. It has a blocking plate 32 and a protruding portion 33 that protrudes from the rear portion of the lower case main body 31 and is located at the lower portion on the front end side of the connecting pipe portion 12, and is formed in a convex shape in plan view.

  The lower case body 31 is integrally fixed to the upper case 16 and the middle case 17 by a plurality of screws (not shown). Further, the lower case body 31 includes a horizontally long front wall portion 35 rising upward on the front end side which is the left side shown in FIG. 2, and an extension portion 36 extending substantially horizontally forward from the upper end of the front wall portion 35. The side wall portions 37 and 37 are continuously formed on both sides of the front wall portion 35 and the extension portion 36, and the front wall portion 35, the extension portion 36, and the side wall portions 37 and 37 form a case. An opening 38 is formed from the front side to the lower side of the body 11.

  The rotary cleaning body chamber 22 is defined by the front cover 18 covering the front side of the front wall portion 35, the extension portion 36, the side wall portions 37 and 37, and the opening portion 38. Further, at the rear of the left end portion shown in FIG. 1 of the front wall portion 35, there is a rear partition wall portion 39 extending toward the rear of the lower case body 31 and having a tip portion bent to the right side shown in FIG. A side transmission chamber 29 is defined on the left side of the rear partition wall 39 and the rotary cleaning body chamber 22 shown in FIG.

  Here, as shown in FIG. 3, the rotary brush 21 provided rotatably in the rotary cleaning body chamber 22 has a substantially elongated cylindrical brush assembly 41 as a shaft member, and an outer peripheral surface of the brush assembly 41. A plurality of, for example, six brush portions 42 as cleaning members attached in a spiral shape are provided. Both end portions of the brush assembly 41 are pivotally supported via a cylindrical bearing 43, and the tip end portion of the brush portion 42 is lowered. It protrudes below the lower surface of the case 15 and can contact the floor surface F.

  As shown in FIGS. 2 and 4, the brush assembly 41 includes a plurality of, for example, six mounting groove portions 45 corresponding to the brush portion 42 on the outer peripheral surface. The mounting groove portions 45 are formed in a spiral shape along the axial direction of the brush assembly 41 and are separated from each other in the circumferential direction of the brush assembly 41.

  Each brush portion 42 is provided with a mounting portion 47 that is a base end portion that is attached to the mounting groove portion 45 of the brush assembly 41, and a plurality of brush portions 42 that are bundled with the mounting portion 47, and the tip portion is a floor. And bristles 48 in contact with the surface F. The bristles 48 are attached to the brush assemblies 41 so as to protrude in the radial direction of the brush assembly 41, respectively.

  As shown in FIG. 3, the bearings 43 are fitted to both end portions of the brush assembly 41, and are rotatably supported by side wall portions 37, 37 that define the rotary cleaning body chamber 22. Further, each bearing 43 is inserted into the case body 11, and the right bearing 43 shown in FIG.

  Further, a front raised cloth 51 as a wiping member is provided on the left front end portion of the lower case body 31 facing the floor surface F shown in FIG. Further, a communication groove 52 communicating with the rotary cleaning body chamber 22 and communicating with the left side portion of the case body 11 shown in FIG. It is provided along the direction.

  Further, a suction port 24 is formed in the rear side of the front wall portion 35 of the lower case body 31, that is, in the rear side of the rotary cleaning body chamber 22 so as to be biased to the left side shown in FIG. 3 and communicate with the suction port 24. 3, a suction groove 54 as a horizontally long air passage is provided on the right side shown in FIG. 3, that is, located below the drive chamber 28 and in the vicinity of the closing plate 32, and the suction port 24 on the left side shown in FIG. From the left side of the case body 11 shown in FIG. 3 and the communication groove 52, intake grooves 55 are provided along the width direction. The suction port 24, the suction groove 54, and the suction groove 55 constitute a suction part 56.

  The suction groove 54 is opened at the bottom, and the total width dimension of the suction opening 24 and the width dimension of the suction opening 24 is substantially equal to the axial dimension of the rotary brush 21 or the longitudinal dimension of the rotary cleaning body chamber 22. It is formed so as to be substantially equal.

  A partition wall 61 that partitions the rotary cleaning body chamber 22 and the suction portion 56 is formed between the front end portion of the suction portion 56 and the rear end portion of the rotary cleaning body chamber 22. The partition wall 61 is provided with a plurality of, for example, five communication passages 62 that communicate with the lower end portions of the rotary cleaning body chamber 22 and the suction portion 56 and are separated from each other in the width direction of the case body 11. . These communication passages 62 are formed in, for example, a horizontally long shape and are respectively disposed between the rear portion of the rotary cleaning body chamber 22 and the suction port 24 of the suction portion 56 and the front portion of the suction groove 54. Therefore, the partition wall portion 61 between each of the communication passages 62 is formed in a horizontally long convex rib shape, and prevents a carpet or the like from sticking to the suction port 24, the suction groove 54, or the communication passage 62.

  Further, on the rear side of the suction part 56 of the lower case main body 31, a raised cloth 64 as a cleaning body elongated in the width direction of the case body 11 is provided. The raised cloth 64 protrudes slightly below the lower surface of the lower case 15.

  Further, in the central region in the width direction of the case body 11 behind the brushed cloth 64, the air is sucked only when the floor brush 9 is lifted from the floor surface F and communicates with the suction side of the connecting pipe portion 12. A leak rear suction port 65 for stopping the rotation of the 27 air turbine 27a, that is, the rotation of the rotary brush 21, is formed as an opening.

  The closing plate 32 is attached to the lower side of the side transmission chamber 29 and accommodates the bearing 43 at one end of the rotary brush 21 so as to be detachable between the upper case 16 and the rotational cleaning of the lower case body 31. The body chamber 22 continues in a longitudinal shape from the front end portion to the rear end portion on one side, and can be attached to and detached from the lower case main body 31 by rotating the mounting member 66.

  Further, a front raised cloth 71 is provided at a position corresponding to the front raised cloth 51 in the front-rear direction of the case body 11 at the front part of the lower surface of the closing plate 32. Further, the closing plate 32 is connected to the front side of the mounting member 66 corresponding to the communication groove 52 in the front-rear direction of the case body 11 and from the lower end portion of the rotary cleaning body chamber 22 to the right side portion of the case body 11 shown in FIG. A communication groove 72 having a lower end opened is provided along the width direction.

  The projecting portion 33 projects so as to become narrower from the rear portion of the center region in the width direction of the lower case body 31 toward the tip, and both ends of the wheel 74 can be rotated at the tip of the projecting portion 33. A notch recess 75 is formed to be pivotally supported. Further, on the front side of the notch recess 75 on the lower surface of the projecting portion 33, a rear raised cloth 76 is provided as a rear cleaning body continuous on both sides of the rear suction port 65. Further, a fitting groove 77 into which the distal end portion of the connecting pipe portion 12 is fitted is provided on the upper surface of the protruding portion 33.

  Further, as shown in FIGS. 1 and 2, the upper case 16 is formed in a horizontally long rectangular plate shape corresponding to the shape of the lower case 15, and the front end portion is curved downward and above the front end portion of the lower case 15. The upper end portion of the front cover 18 is pivotally supported by the front end portion so as to be rotatable.

  Further, an annular rib 78 in plan view that fits into the upper part of the middle case 17 projects downward from the lower part of the upper case 16, and is fitted to the upper end of the middle case 17 of the rib 78. Thus, the drive chamber 28 is partitioned. The upper and rear portions of the upper case 16 on the right side shown in FIG. An opening 79 is formed.

  The upper case 16 has a rear portion in the center region in the width direction that protrudes above the base end portion of the protruding portion 33 of the lower case 15 and is fitted to the outer periphery of the connecting tube portion 12 on the front end side.

  Further, as shown in FIGS. 1 and 2, the middle case 17 has an intake chamber wall that partitions an intake chamber 81 communicating with all of the intake ports 79 on the right side of the drive chamber 28 in FIG. 1, that is, above the intake chamber 25. And a turbine chamber 83 that is continuous with the intake chamber wall portion 82 and has an upper end abutting against the rib 78 of the upper case 16 to accommodate the air turbine 27a in the drive chamber 28 and intake air from the intake port 79 A turbine chamber wall portion 85 that defines an introduction air passage 84 that introduces wind into the turbine chamber 83 and flows it to the connecting pipe portion 12, and a portion in which the intake chamber 81 and the turbine chamber 83 are located in the drive chamber 28 And a portion where the transmission chamber 88 for accommodating the transmission portion 27b is located.

  The intake chamber wall portion 82 is formed in a horizontally long rectangular shape in plan view and is positioned along the substantially horizontal direction, and the front end of the portion adjacent to the turbine chamber wall portion 85 is directed downward toward the introduction air passage 84. It is formed in a concave shape.

  The turbine chamber wall 85 includes a substantially bottomed cylindrical wall body 91, and a shaft support 92 that projects downward from the center of the bottom of the wall body 91 and pivotally supports the air turbine 27a. The wall main body 91 has an air passage partition section 93 that protrudes downward from the front of the shaft support section 92 and partitions the introduction air path 84 along the periphery of the shaft support section 92.

  The wall main body 91 is spaced apart from the outer periphery of the air turbine 27a via a slight gap, and the upper end of the wall main body 91 abuts against the rib 78 of the upper case 16 to define the turbine chamber 83 between the upper case 16 and the upper wall. Therefore, the right front end portion shown in FIG. 1 is continuous with the front end portion of the intake chamber wall portion 82. For this reason, the introduction air passage 84 is expanded toward the intake chamber 81 on the right side of the air turbine 27a.

  Further, as shown in FIGS. 1 and 2, the shaft support portion 92 is formed in a substantially cylindrical shape having a communication hole 95 at the center for communicating the turbine chamber 83 and the transmission chamber 88. Further, an intermediate case rib 96 projects downward from the lower end of the shaft support 92 on the rear side, and the lower end of the intermediate case rib 96 faces upward from a position above the raised cloth 64 of the lower case 15. By fitting into the upper end portion of the lower case rib 97 protruding in this manner, the rear suction port 65 side and the drive chamber 28 are airtightly partitioned by these ribs 96 and 97.

  Further, the air passage partition section 93 is inclined upward from the lower end of the shaft support section 92 so as to form a convex arc shape in a cross-sectional view and continues to the bottom of the turbine chamber wall section 85 and the intake chamber wall section 82. The front end portion is in contact with the upper end portion of the front wall portion 35 of the lower case 15.

  Here, as shown in FIG. 2, the air turbine 27a accommodated in the turbine chamber 83 of the drive chamber 28 is provided integrally with the turbine body 101 and a flat turbine body 101 having a circular shape in plan view. As shown in FIG. 1, the rotary shaft 102 is positioned substantially at the center in the width direction of the case body 11 of the floor brush 9.

  The turbine body 101 is a portion accommodated in the turbine chamber 83. As shown in FIG. 2, the turbine body 101 includes a disk-shaped top plate 104 and a plurality of turbine blades 105 projecting from the bottom of the top plate 104. I have. These turbine blades 105 rotate the air turbine 27a in response to the intake air passing through the introduction air passage 84, and are curved in the circumferential direction from the central axis side of the turbine body 101 toward the outer peripheral edge of the top plate 104. The front ends of the turbine main body 101 face the introduction air passage 84 at a substantially equal interval in the circumferential direction of the turbine body 101.

  Further, the rotation shaft 102 is inserted into the shaft support portion 92, and retaining rings 106 and 107 attached to the outer peripheral surfaces of the upper and lower portions engage with the step portions 108 and 109 provided in the shaft support portion 92, respectively. Thus, the intermediate case 17 is prevented from coming off.

  Further, the transmission chamber 88 is partitioned and formed on the left side of the case body 11 shown in FIG. 1, that is, on the side of the suction chamber 25, and the left bearing 43 shown in FIG.

  The transmission portion 27b accommodated in the transmission chamber 88 is a so-called gear box, and is located on the side of the suction port 24 as shown in FIGS. 1 and 2, and the transmission portion main body 111 as a gear accommodation portion. A tension pulley 112 and a drive pulley 113 that project downward from the transmission unit main body 111 and rotate in the horizontal direction; and a transmission pulley 114 that projects from the transmission unit main body 111 on the left side and rotates in the vertical direction shown in FIG. The belt 115 is wound between the rotating shaft 102 of the air turbine 27a and each of the pulleys 112 and 113, and the transmission belt 116 is interposed between the transmission pulley 114 and the bearing 43 of the rotating brush 21. It is wrapped around.

  In the transmission unit main body 111, the rotational force and rotational direction of the pulleys 112 and 113 to which the rotational force of the air turbine 27a is transmitted via the belt 115 are converted into the rotational force and rotational direction of the transmission pulley 114 (not shown). A bevel gear is provided.

  Further, the tension pulley 112 applies a predetermined tension to the belt 115.

  Further, the drive pulley 113 transmits the rotational force from the air turbine 27a to a predetermined gear provided in the transmission unit main body 111.

  The transmission pulley 114 transmits the rotational force of the air turbine 27a transmitted from the drive pulley 113 to the rotating brush 21.

  Further, the front cover 18 is formed of a slightly flexible synthetic resin or the like. As shown in FIGS. 1, 2, and 4, the horizontally long front cover body 121 and the upper end portion of the front cover body 121 are formed. A plurality of projecting portions 122 projecting from the rear to the rear, and is pivotally supported by a pivot shaft 123 provided along the width direction at the front end portion of the upper case 16 so as to be pivotable in the front-rear direction. Yes. The front cover 18 protrudes forward from the front surface of the lower case 15 in the normal state. When the front side of the floor brush 9 collides with an obstacle O as an abutted object such as a wall, for example. The lower end side pivots backward.

  The front cover main body 121 is formed in a convex cross-section arc shape on the front side, and partitions the front side of the rotary cleaning body chamber 22. The front cover body 121 has a lower end located near the central axis of the brush assembly 41 of the rotating brush 21 and, when rotated rearward, the lower end approaches the floor F as shown in FIG. The front ends of the brush hairs 48 of the brush portion 42 of the rotating brush 21 are in contact with the rear surface. Further, a plurality of concave portions 124 having a concave arc shape in cross section are provided at the front portion of the front cover main body 121 along the width direction of the case body 11.

  Furthermore, as shown in FIG. 2, a plurality of reinforcing ribs 125 for reinforcement are provided on the rear surface side of the front cover main body 121 along the front-rear direction. These cover ribs 125 are separated from each other in the width direction of the case body 11.

  The projecting portions 122 are formed in a quadrangular shape in plan view and are separated from each other in the width direction of the case body 11. Further, between the projecting portions 122, fitting piece portions (not shown) projecting further forward from the extending portion 36 of the lower case 15 are fitted.

  Further, as shown in FIG. 4, the rear end portion of the projecting portion 122 is fitted in a normal state with the front cover 18 in a notch fitting recessed portion 127 formed by notching the upper end of the extending portion 36. is doing. A fitting recess 128 having a circular shape in section when the rotating shaft 123 is fitted is provided at a lower portion of the projecting portion 122, and a rear end side edge of the fitting recess 128 is directed rearward. An inclined surface portion 129 that is inclined upward is provided. The inclined surface portion 129 is in sliding contact with the front end portion of the extending portion 36 when the front cover 18 is rotated rearward so as to close the upper gap of the rotary cleaning body chamber 22. The inclined surface portion 129 regulates the angle of rotation of the front cover 18 to the rear by contacting the front surface of the extension portion 36 in a state where the front cover 18 is rotated to the maximum rearward. The inclination angle is appropriately set according to the amount of rotation of the front cover 18.

  Further, the rotating shaft 123 is formed of a member such as metal, for example, and is inserted through each fitting piece and fitted into the fitting recess 128 of the projecting portion 122 from below, and is integrally attached. . Further, torsion springs (not shown) are attached at positions corresponding to the fitting pieces located at both ends of the rotating shaft 123, and these torsion springs apply a biasing force to the front cover 18 in the forward direction. is doing.

  The bumper 19 is provided for buffering when the floor brush 9 collides with a wall or the like by, for example, a soft synthetic resin.

  Further, the rotary cleaning body chamber 22 and the suction chamber 25 are provided adjacent to each other so that dust picked up by the rotary brush 21 does not reattach to the floor surface F.

  Further, the rotary cleaning body chamber 22 and the drive chamber 28 are provided adjacent to each other in order to make the case body 11 compact.

  Next, the cleaning operation according to the above embodiment will be described.

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

  Further, when the operator pulls out a power cord (not shown) from the cleaner body 1 and connects it to an outlet (not shown), and then grips the grip 6 and operates a predetermined setting button 7, the setting button 7 is set. The electric blower 2 is driven in a predetermined operation mode according to the operation mode.

  Next, the operator grips the grip portion 6 and causes the floor brush 9 to run forward and backward on the floor surface F to suck in dust on the floor surface F.

  At this time, the raised cloth 64 and the rear raised cloth 76 are in close contact with the floor surface F, so that the periphery of the rear suction port 65 is closed, and air is sucked in from the suction port 24 below the floor brush 9. On the upper side, air is sucked from the intake port 79.

  The negative pressure of the suction from the suction port 24 is averaged by the communication grooves 52, 72 and the suction groove 54, and dust is sucked together with air from the communication grooves 52, 72 and the suction groove 54 through the suction port 24. It is.

  At the same time, when the air sucked from the intake port 79 flows into the introduction air passage 84 through the intake chamber 81 and passes through the connection pipe portion 12 while being accelerated by the introduction air passage 84 whose diameter is reduced. The air turbine 27a is rotated by hitting the turbine blade 105.

  The rotation of the rotating shaft 102 rotated by the rotation of the air turbine 27a is transmitted to the drive pulley 113 via the belt 115, and the rotation direction is converted in the transmission unit 27b and output from the transmission pulley 114. The output of the transmission pulley 114 is transmitted to the rotary brush 21 via the transmission belt 116, and the rotary brush 21 rotates in a predetermined direction.

  Then, by the rotation of the rotating brush 21, the tips of the brush hairs 48 of the brush portion 42 come into contact with the floor surface F and scrape up dust on the floor surface F.

  The dust thus picked up is sucked together with air into the suction groove 54 and the suction port 24 through the communication path 62.

  Further, when the front side of the floor brush 9 is pressed against an obstacle O such as a wall, the lower end side of the front cover 18 rotates backward about the rotation shaft 123 as shown in FIG. The brush bristles 48 of the brush portion 42 of the floor brush 9 approach the floor surface F at the time of the obstacle O, the front surface of the front cover 18 is substantially flush with the front surfaces of the lower case 15 and the upper case 16, and the front cover The rear surface of 18 abuts on the tip of the bristle 48 of the brush portion 42 of the rotating brush 21 and applies a load to the rotating brush 21.

  At this time, the upper side and the lower side of the contact position of the front cover 18 against the obstacle O are partitioned substantially airtightly, and the obstacle O and the rotary cleaning body chamber 22 form a substantially closed space, Since the suction air volume from the front side of the case body 11, that is, the suction port 24 side decreases, the suction air volume from the intake port 79 relatively increases, and the rotational force of the air turbine 27a, that is, the rotational force of the rotary brush 21 increases. Scoop up dust on the obstacle O.

  At the same time, the inclined surface portion 129 is in sliding contact with the front end portion of the extending portion 36 and always closes the gap above the rotary cleaning body chamber 22.

  When the front side of the floor brush 9 is separated from the obstacle O, the lower end side of the front cover 18 is moved forward about the rotation shaft 123 by the urging force of the torsion spring as shown by the imaginary line in FIG. Rotate to return.

  At this time, the rear end portion of the protruding portion 122 of the front cover 18 is fitted into the notch fitting concave portion 127 of the extending portion 36, and the lower end portion of the upper case 16 is more than the rotating shaft 123 of the protruding portion 122. The upper surface of the front side comes into contact with no gap and holds the front cover 18.

  Further, when the floor brush 9 is lifted from the floor surface F, the rear suction port 65 is opened, so that air is sucked from both the suction port 24 and the rear suction port 65. The air volume is relatively reduced, and the rotation of the air turbine 27a, that is, the rotating brush 21, is stopped.

  The dust sucked together with air from the floor brush 9 sequentially passes through the floor brush 9, the extension pipe 8 and the hose body 4, and then is guided to the main body suction port 3 of the cleaner body 1. It is collected in a dust collection pack housed in 1.

  The air in which the dust is collected is sucked into the electric blower 2 to become exhaust air, and is exhausted from an exhaust port (not shown) of the cleaner body 1 to the outside.

  As described above, in the above embodiment, in the lower part of the drive chamber 28 that houses the transmission part 27b of the drive part 27 on the side of the suction chamber 25 that communicates with the suction port 24, the lower part that communicates with the suction port 24. The suction groove 54 is opened.

  Here, in such a floor brush 9, the rotary cleaning body chamber 22 and the suction chamber 25 are provided adjacent to each other in order to prevent re-deposition of the dust scraped up by the rotary brush 21 to the floor surface F, Further, since the drive chamber 28 and the rotary cleaning body chamber 22 are provided adjacent to each other in order to make the case body 11 compact, the suction chamber 25 and the drive chamber 28 are arranged in the width direction of the case body 11. On the other hand, since it is preferable not to provide the suction port 24 in the drive chamber 28 so as to prevent dust from being sucked in order to protect the drive unit 27, the suction port 24 does not deviate in the width direction of the case body 11. Since the dust on the floor F located on the opposite side of the case body 11 from the suction port 24 was not easily sucked, the suction port 24 is located by providing the suction groove 54 as described above. This prevents the negative pressure on the lower side of the drive chamber 28 from being lowered, thereby preventing variations in the negative pressure distribution and driving. The lower part of the chamber 28 is effectively used by the suction groove 54, the width of the air passage leading to the suction port 24 is secured at the lower part of the case body 11, and the dust that the rotating brush 21 has scraped from the floor F is sucked into the suction groove. Suction can be reliably sucked into the suction port 24 through 54, and dust suction efficiency can be improved.

  In particular, the size of the suction port 24 and the suction groove 54 combined with each other is made substantially equal to the axial dimension of the rotary brush 21, so that the dust brushed up from the floor F by the rotary brush 21 is removed from the rotary brush 21. It is possible to reliably suck into the suction port 24 from the rear.

  Further, an air intake groove 55 that communicates the air inlet 24 with the side of the case body 11 is provided on the side of the air inlet 24 opposite to the air inlet groove 54, so that the floor surface F on the side of the case body 11 is provided. Can be sucked into the suction port 24 through the intake groove 55, and the dust suction efficiency can be further improved.

  Further, by providing communication grooves 52 and 72 communicating with both sides of the case body 11 on both sides of the rotary cleaning body chamber 22, dust on the floor surface F on both sides of the case body 11 can also be communicated with the communication grooves 52. , 72 can be sucked in, and dust collection efficiency can be further improved.

  In addition, since air on the side of the case body 11 can be sucked from the intake grooves 55 and the communication grooves 52 and 72, the floor brush 9 can be reliably prevented from sucking more than necessary to the floor surface F such as a carpet.

  Then, by providing the communication passage 62 in which the rear portion of the rotary cleaning body chamber 22 is connected to the suction port 24 and the suction groove 54 and the lower part is opened, the floor F on the front side of the case body 11 by suction from the suction port 24 is provided. You can also inhale the dust above.

  Further, when the lower end portion of the front cover 18 contacts the obstacle O and rotates backward by pressing the front side of the case body 11 of the floor brush 9 against the obstacle O, the rear surface of the front cover 18 is the rotating brush. 21 and the lower end approaches the floor surface F, the opening 38 becomes narrow, and the obstacle O and the rotary cleaning body chamber 22 form a substantially closed space, thereby increasing the load on the rotary cleaning body chamber 22. Since the suction from the rotary cleaning body chamber 22 side decreases, the amount of intake air from the intake port 79 relatively increases and the rotational force of the air turbine 27a increases, which increases the load applied to the rotary brush 21. Correspondingly, the rotational force of the rotary brush 21 can be increased without using a motor, for example, and the cleaning performance by the rotary brush 21 can be ensured while suppressing the cost.

  And since it is not necessary to use a motor etc. for the floor brush 9, the increase in the weight of the floor brush 9 can be prevented and the operativity of the floor brush 9 by an operator can also be improved.

  Further, when the front side of the floor brush 9 is pressed against the obstacle O, the lower end portion of the front cover 18 rotates rearward, so that the tip of the brush hair 48 of the rotating brush 21 is the floor surface F when the obstacle O is present. Therefore, the dust on the floor surface F at the time of the obstacle O can be reliably scraped up by the bristles 48 of the rotary brush 21 and sucked into the suction port 24.

  Further, by providing the intake port 79 on the upper side and the rear side of the case body 11, even if the floor brush 9 is brought into contact with the obstacle O or the like, the intake port 79 is not blocked, and the intake can be reliably performed.

  Further, the floor brush 9 is closed when the floor brush 9 is grounded to the floor surface F, and the floor brush 9 is opened by providing a rear suction port 65 on the lower surface of the case body 11 that is opened when the floor brush 9 is separated from the floor surface F. When grounding to the floor F, air is sucked only from the suction port 24 below the case body 11, so that the amount of intake air from the suction port 79 is relatively increased, and the air turbine 27a, that is, the rotating brush 21 is While being able to rotate reliably, when separating the floor brush 9 from the floor surface F, since air is sucked in from the suction port 24 and the rear suction port 65 on the lower side of the case body 11, As a result, the amount of intake air is relatively reduced, and the rotation of the air turbine 27a, that is, the rotating brush 21, can be reliably prevented.

  Further, in the state where the front cover 18 is rotated forward, the opening amount of the opening portion 38 is increased, and the upper surface on the front side of the rotation shaft 123 of the projecting portion 122 is the upper case 16 by the urging force of the torsion spring. And the rear end portion of the projecting portion 122 is fitted into the notch fitting concave portion 127 and pressed downward, so that the airtightness on the upper side of the rotary cleaning body chamber 22 is secured. The amount of suction from the front side of the case body 11 due to suction from the front can be secured.

  And, when the front cover 18 rotates rearward, the inclined surface portion 129 of the front cover 18 is in sliding contact with the front end portion of the extending portion 36 to ensure airtightness on the upper side of the rotary cleaning body chamber 22, A substantially closed space can be formed more reliably.

  Further, by positioning the air turbine 27a substantially at the center in the width direction of the case body 11, the size of the air turbine 27a can be secured within the limited size of the case body 11, and the rotational force of the rotating brush 21 can be increased. It can be secured.

  In the above-described embodiment, the intake port 79 can be provided at an arbitrary position as long as it is located above the intake port 24 and other than the front side of the case body 11.

  Further, the vacuum cleaner is not limited to a canister type vacuum cleaner, and is used in correspondence with an upright type in which the floor brush 9 is directly formed on the lower surface of the vacuum cleaner body 1 or a handy type. be able to.

It is a top view which cuts off a part and shows the suction inlet of one embodiment of this invention. It is a longitudinal cross-sectional view which shows a suction inlet same as the above. It is a bottom view which shows a suction inlet same as the above. It is a longitudinal cross-sectional view which shows the movement state of the front cover of a suction inlet body 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 Floor Brush as Suction Port
11 Case body
21 Rotating brush as rotating cleaning body
22 Rotary cleaning body chamber
24 Suction port
25 Suction chamber
27 Drive unit
27a Air turbine as a fan
28 Drive room
54 Suction groove as air passage
62 Communication path
79 Inlet F F Floor as surface to be cleaned

Claims (3)

A suction port facing the surface to be cleaned, an intake port located above the suction port, a drive unit having a fan that can be rotated by the intake air from the intake port, and rotational cleaning driven by the drive unit A case body with a body,
The case body is
A rotary cleaning body chamber having the rotary cleaning body in the lower part facing the surface to be cleaned;
A suction chamber provided behind the rotary cleaning body chamber and communicating with the suction port;
A drive chamber that houses at least a part of the drive unit on the side of the suction chamber;
A suction port body for a vacuum cleaner, comprising: an air passage having at least a part formed in a lower portion of the drive chamber and communicating with the suction port and having a lower portion opened. The suction port body of an electric vacuum cleaner according to claim 1, wherein the case body includes a plurality of communication passages in which a rotary cleaning body chamber and a suction chamber are communicated with each other and a lower portion is opened. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising: the suction port body according to claim 1, which is connected to the suction side of the electric blower.

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