JP2014176505A - Vacuum cleaner and suction port body thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor brush capable of suppressing relative inclination of a case body to a connection pipe being excellent in operability in cleaning and a vacuum cleaner equipped therewith.SOLUTION: A floor brush 23 has a case body 31. The floor brush 23 has a connection pipe 32 connected to the case body 31. The floor brush 23 has a rotation brush rotatably arranged into the case body 31. The floor brush 23 has an electric motor housed in the case body 31 at a position of one side with respect to a shaft center C of the connection pipe 32 for rotatably driving the rotation brush. The connection pipe 32 has a fixed pipe 67 attached in such a manner as not to rotate around at least the shaft center with respect to the case body 31. The connection pipe 32 has a rotatable pipe 68 connected to be rotatable around the shaft center with respect to the fixed pipe 67. The connection pipe 32 has a coil spring 78 biasing the rotatable pipe 68 in a direction around the shaft center for the other side direction against a weight of the electric motor with respect to the fixed pipe 67.

Description

  FIELD Embodiments described herein relate generally to a suction port body of a vacuum cleaner having a case body that houses an electric motor and a connecting pipe connected to the case body, and a vacuum cleaner including the same.

  Conventionally, a floor brush as a suction port body used in a vacuum cleaner has a laterally extending case body, that is, a horizontally long case body and a connection pipe connected to the case body so as to be rotatable around an axis. I have. In the case body, a suction port communicating with the connecting pipe is opened on the lower surface facing the floor surface as the surface to be cleaned. Moreover, the rotary brush as a rotary cleaning body is rotatably arrange | positioned at this suction inlet. This rotating brush is rotationally driven by an electric motor as driving means accommodated in the case body, for example.

  And, for example, in a canister-type vacuum cleaner, such a rotating brush is connected to an extension pipe connected to the distal end side of the hose body connected to the cleaner body, and the user connects the distal end portion of the hose body. The floor brush is moved back and forth on the floor surface by gripping the gripping portion of the door, and the dust scraped by the rotating brush or the like is sucked from the suction port and cleaned.

JP-A-6-217908

  In the case of such a floor brush, when the floor brush is lifted away from the floor surface, for example, when the cleaning position is changed or the electric vacuum cleaner is transported, the motor side of the case body depends on the weight of the motor. There may be a case where it rotates and tilts relative to the connecting pipe. And when a case body inclines in this way, it is difficult to place a floor brush on a floor surface again.

  In order to prevent such an inclination of the case body, in the configuration described in Patent Document 1, an electric motor is arranged at the lower part of the connecting pipe to average the weight balance of the floor brush. However, in the case of this configuration, for example, when the floor brush collides with an obstacle or the like during cleaning and the case body tilts relative to the connecting pipe, the tilted state is maintained as it is. It cannot be said that the property is good.

  Although it may be possible to incorporate a detent member such as a felt that increases the rotational resistance between the case body and the connection tube, in this configuration, the case body and the connection tube are rotated by the detent member. When the anti-rotation member wears with time, the predetermined rotation resistance cannot be obtained, and as a result, the motor side of the case body is connected to the connecting pipe by the weight of the motor. Rotate downward relative to the inclination.

  The problem to be solved by the present invention is to suppress the relative inclination of the case body with respect to the connecting pipe, and to provide a suction port body for a vacuum cleaner with good operability during cleaning, and an electric vacuum cleaner including the same Is to provide a machine.

  The suction port body of the vacuum cleaner of the embodiment has a case body. Moreover, this suction inlet body has a connecting pipe connected to the case body. Furthermore, this suction inlet body has a rotary cleaning body rotatably arranged on the case body. Further, the suction port body is housed in the case body at a position on one side with respect to the axis of the connecting pipe, and has an electric motor that rotationally drives the rotary cleaning body. The connecting pipe includes a fixed pipe that is attached to the case body so as not to rotate at least around the axis. The connecting pipe includes a rotating pipe connected to the fixed pipe so as to be rotatable about an axis. Further, the connection pipe includes an urging means for urging the rotary pipe with respect to the fixed pipe in the direction around the axis toward the other side against the weight of the electric motor.

It is sectional drawing which shows the II equivalent position of FIG. 5 of the suction inlet of the vacuum cleaner of one Embodiment. It is sectional drawing which shows a part of suction port body same as the above, (a) shows the state which rotated the rotating tube to one side with respect to the case body, (b) shows the rotating tube with respect to the case body. The state which turned to the other side is shown. It is a disassembled perspective view which shows the connecting pipe of a suction inlet body same as the above. It is a longitudinal cross-sectional view which shows a suction inlet same as the above. It is a top view which shows a suction inlet same as the above. It is a perspective view which shows a suction port body same as the above from the lower side. It is a perspective view which shows a suction inlet body same as the above from the upper side. It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above.

  Hereinafter, the configuration of an embodiment will be described with reference to FIGS. 1 to 8.

  In FIG. 8, reference numeral 11 denotes a so-called canister-type vacuum cleaner. The vacuum cleaner 11 is a vacuum cleaner body 12 and a tube which is an air passage forming body detachably connected to the cleaner body 12. Part 13.

  The vacuum cleaner main body 12 can turn and run on the floor F (FIG. 4) as a surface to be cleaned. The electric blower 18, a main body control unit (not shown) that controls the operation of the electric blower 18, and these electric motors A cord reel device for supplying power to the blower 18 and the main body control unit, or a power supply unit such as a secondary battery is accommodated, and a dust collection unit (not shown) communicating with the suction side of the electric blower 18 is provided. . In addition, a main body suction port 19 is formed in the front portion of the cleaner body 12 so as to communicate with the dust collecting portion and to which the proximal end side of the tube portion 13 is connected.

  The pipe portion 13 includes a hose body 21, an extension pipe 22 made of, for example, synthetic resin that can be attached to and detached from the hose body 21, and a floor brush 23 as a suction port body that can be attached to and detached from the extension pipe 22. I have.

  The hose body 21 includes a flexible hose portion 25, a connecting pipe portion 26 provided on the base end side (downstream side) of the hose portion 25 and connected to the main body suction port 19, and a distal end side of the hose portion 25. And a handy operating unit 27 provided on the (upstream side).

  The proximal end side (downstream side) of the extension pipe 22 is detachably connected to the hand operation unit 27. Further, the hand operating part 27 is formed with a grip part 28 that is gripped by the user so as to protrude to the base end side, and this grip part 28 is for setting the operation mode of the electric blower 18 to the main body control part. The setting button 29 is arranged.

  Further, as shown in FIGS. 1 to 8, the floor brush 23 sucks dust on the floor surface F by running on the floor surface F. Hereinafter, the front and rear direction and the left and right direction (both sides and width) are based on the traveling direction of the floor brush 23. The floor brush 23 has a longitudinally extending case body 31 extending in the left-right direction, that is, a horizontally long case body 31, and is rotatably connected to the rear part of the case body 31 and attached to the distal end side (upstream side) of the extension pipe 22. And a connecting pipe 32 that can be connected.

  The case body 31 is divided into a plurality of case parts such as upper and lower parts formed by a member such as a synthetic resin, for example, from a horizontally long case body 35 in a plan view, and a central part of the rear part of the case body 35 It is a convex shape in plan view, which is integrally provided with a quadrangular protruding portion 36 protruding rearward. A connection opening 37 to which the connection pipe 32 is connected is opened at an upper portion of the projecting portion 36 that is a central portion of the rear portion of the case body 35. Inside the case body 35, a suction chamber 41 communicating with the upstream side (front end side) of the connection pipe 32 is partitioned longitudinally in the left-right width direction at the front, and behind the suction chamber 41 and the connection pipe A drive chamber 42 and a control chamber 43 are defined on both sides of 32, a transmission chamber 44 is defined longitudinally in one side of the drive chamber 42, and is pivotally supported on the other side of the drive chamber 42. Chamber 45 is partitioned.

  A horizontally long suction port 49 that communicates with the suction chamber 41 and opens to face the floor surface F is formed in the lower portion of the case body 35. A rotary brush 51 as a rotary cleaning body is rotatably supported at the suction port 49.

  Here, the rotary brush 51 scrapes out dust and the like that has entered the floor surface F, and includes a shaft portion 53 formed in a long shape and a plurality of cleaning members 54 protruding from the shaft portion 53 in the radial direction. And.

  Bearing bodies 56, 56 are attached to both ends of the shaft portion 53, and these bearing bodies 56, 56 rotate with respect to a bearing portion (not shown) of the case body 31 inside the transmission chamber 44 and the shaft support chamber 45. It is held movable.

  The cleaning member 54 is, for example, a bristle brush that sweeps out dust, or a blade that is formed into a plate shape by a soft member and blows out dust, and is arranged in a spirally twisted manner on the outer periphery of the shaft portion 53. .

  The protrusion 36 has a notch 59 formed at the rear end thereof, and the floor brush 23 (case body 31) is placed on the floor F in the fitting notch 59. A traveling wheel 60 that rotates following contact with F is rotatably supported so as to have an axial direction along the left-right direction.

  In the suction chamber 41, the rotating brush 51 is accommodated. Further, the suction chamber 41 communicates with the outside of the case body 31 and with the connection pipe 32 through a suction port 49.

  The drive chamber 42 accommodates an electric motor 61 as drive means for driving the rotary brush 51 to rotate. That is, the electric motor 61 is located on the side (one side) with respect to the axis C of the connecting pipe 32. Furthermore, the electric motor 61 is arranged so as to have a rotating shaft 61a along the left-right direction. In addition, the electric motor 61 is driven, for example, by supplying power from the cleaner body 12 side.

  The control chamber 43 accommodates a control unit 62 that controls the driving state (driving and stopping) of the electric motor 61 and the like. That is, the control unit 62 is located on the side (the other side) with respect to the axis C of the connecting pipe 32. Further, the control unit 62 is configured by mounting various components on a substrate, for example, and receives power from the cleaner body 12 side. The control unit 62 switches between driving and stopping of the electric motor 61 in accordance with the operation of the setting button 29.

  Here, the control unit 62 is configured to be lighter than the electric motor 61. Therefore, the floor brush 23 (case body 31) is relatively heavy on one side, that is, on the motor 61 side with respect to the connection pipe 32 (axis C of the connection pipe 32), and on the other side, that is, on the control unit 62 side. The weight of is relatively light. In other words, the left and right center-of-gravity balance of the floor brush 23 (case body 31) is biased to one side (the motor 61 side).

  The transmission chamber 44 houses a pulley 64 and a timing belt 65 that constitute transmission means for transmitting the driving force of the electric motor 61 to the rotating brush 51. The pulley 64 is attached to the rotating shaft 61a of the electric motor 61. The timing belt 65 is wound endlessly between one bearing body 56 inserted into the transmission chamber 44 and the pulley 64.

  On the other hand, the connection pipe 32 is a fixed pipe 67 which is an upstream pipe portion fixed so as not to rotate in the direction around the axis (around the axis C) with respect to the connection opening 37 of the case body 35 of the case body 31. , A rotating pipe 68 which is a downstream pipe portion pivotably supported in a direction around the axis (around the axis C) with respect to the downstream side of the fixed pipe 67, and the fixed pipe 67 and the rotary pipe 68 And a connecting portion 70 that is pivotally supported by the rotary tube 68 so as to be pivotable in a direction intersecting (orthogonal) with respect to the axis C.

  The fixed tube 67 is formed integrally with a member such as a synthetic resin, and is provided on the outer periphery of the fixed tube main body 71, a cylindrical fixed tube main body 71, a flange portion 72 protruding from the outer periphery of the fixed tube main body 71, and the fixed tube main body 71. And a groove 73.

  The fixed pipe main body 71 is formed in a gradually increasing diameter from the rear end 71a side that is the downstream end to the front end 71b side that is the upstream end, and the front end 71b has an elliptical (oval) shape that is flat in the left-right direction. It is in communication with the suction chamber 41 (suction port 49). Further, the fixed pipe main body 71 is sandwiched from above and below by a case portion constituting the case main body 35 of the case body 31, and is prevented from coming off.

  The flange portion 72 protrudes in the radial direction at an intermediate position between the rear end 71a and the front end 71b of the fixed tube main body 71, and comes into contact with the front end that is the upstream end of the rotary tube 68. The front end is positioned and guided in the circumferential direction around the axis of the rotary tube 68 (around the axis C) with respect to the fixed tube 67. Further, the flange 72 is brought into contact with a regulation rib 75 as a regulation part protruding from the upper edge of the connection opening 37 of the case body 31 (case body 35), so that the case body 31 (case body 35). In contrast, the movement in the direction of entering the case body 31 (the case main body 35) is restricted.

  The groove portion 73 is formed continuously along the circumferential direction, for example, over the entire circumference, closer to the rear end 71a than the flange portion 72 on the outer periphery of the fixed tube main body 71, and the inner side of the front end side of the rotary tube 68. Is located. That is, the groove 73 faces the inner peripheral surface of the rotary tube 68. In addition, a wall 77 is projected inside the groove 73, and a coil spring 78 as an urging means is disposed between the wall 77 and the fixed body 69.

  The wall portion 77 protrudes along the radial direction of the fixed tube 67 (fixed tube main body 71), and does not protrude radially outward from the groove portion 73, that is, the fixed tube 67 (fixed tube main body in the vicinity of the groove portion 73). 71) is set so as not to protrude from the outer peripheral surface. Therefore, the wall portion 77 is set so that the distal end side is separated from the inner peripheral surface of the rotating tube 68 and does not interfere with the rotating tube 68. Further, the wall portion 77 is connected to the fixed body 69 in a state in which the rotary tube 68 is rotated to the maximum in one direction, for example, the electric motor 61 side, around the axis (around the axis C) with respect to the fixed tube 67. It is arranged at a position where it does not interfere (a position separated from the fixed body 69).

  The coil spring 78 is, for example, a compression spring in the present embodiment, and one end (lower end) contacts the wall portion 77 and the other end (upper end) contacts one fixed body 69 and is accommodated in the groove portion 73. The rotating tube 68 is biased relative to the fixed tube 67. Therefore, the coil spring 78 is located between the fixed tube 67 and the rotary tube 68 and does not slide (slidably contact) with the fixed tube 67 and the rotary tube 68. The biasing direction of the coil spring 78 is against the weight of the electric motor 61 so that the rotary tube 68 is directed to the other side of the axis C, that is, in the direction opposite to the electric motor 61 (the direction of the control unit 62). It has become a direction to rush. Further, the urging force of the coil spring 78 is set so as to keep the suspension against the weight of the electric motor 61 (the difference in weight between the electric motor 61 and the control unit 62). In other words, the coil spring 78 is arranged so that the rotating tube 68 (connection tube 32) maintains a neutral position in which the rotating tube 68 (connecting tube 32) is not rotated in the left-right direction around the shaft center (around the shaft center C). 68 are energized.

  The rotating tube 68 includes a rotating tube main body 81 and a rotating tube cover 82 that covers the lower portion of the rotating tube main body 81. The rear end 71a side of the fixed tube main body 71 of the fixed tube 67 is inserted into the rotary tube 68.

  The rotary tube main body 81 is integrally formed of a member such as synthetic resin, for example, and has an annular main body 84 and connection arm portions 85 and 85 as connection protrusions extending rearward from both sides of the main body 84. I have.

  The main body portion 84 has a front end 84a that is an upstream end in contact with a rear portion of the flange portion 72 of the rotary tube 68, and slides along the flange portion 72 in a state where the rotary tube 68 is rotated with respect to the fixed tube 67. It comes to touch. The main body 84 is located behind the connection opening 37 and above the protruding portion 36 and is exposed to the outside of the case main body 35. Further, the groove portion 73 of the fixed tube 67 faces the inner peripheral surface of the main body portion 84. Further, the main body 84 is provided with an opening 87 in a longitudinal direction along the circumferential direction at a position symmetrical with respect to the axis C, for example, at each of the upper and lower positions. Has been. These openings 87 are opened in a direction intersecting (orthogonal) with respect to the axis C so as to communicate with the inside of the main body 84 (the rotary tube 68). The openings 87 are opposed to the groove portions 73 and communicate with the groove portions 73, respectively. In other words, through these openings 87, the groove 73 of the fixed tube 67 inserted into the rotating tube 68 communicates with the outside of the connecting tube 32 (the rotating tube 68). These openings 87 are closed by a cover 88 with a fixed body 69 fitted therein. Each cover 88 covers the fixed body 69 so as not to be exposed to the outside from the opening 87, and is substantially flush with the outer peripheral surface of the main body 84 when attached to the opening 87.

  Each connection arm 85 is for connecting the rotary tube main body 81 and the rotary tube cover 82 and pivotally supporting the connection portion 70, inside the lower part facing the rotary tube cover 82, A semicircular cutout 89 is formed in each case (only one is shown). Further, a turning notch 90 for turning the connecting portion 70 is defined between the connecting arm portions 85 and 85 and the main body portion 84.

  The rotary tube cover 82 is for pivotally supporting the connection portion 70 together with the rotary tube main body 81 so as to be pivotable. For example, the rotary tube cover 82 is integrally formed of a member such as a synthetic resin and is integrally attached to the rotary tube main body 81 and connected. It covers the lower part between the arms 85 and 85. Further, the rotary tube cover 82 is provided with projecting wall portions 92 and 92 projecting from the connecting arm portions 85 and 85 of the rotary tube main body 81 so as to be spaced apart from each other. Each protruding wall 92 is formed with a semicircular arc-shaped notch 93 at the upper portion facing the rotary tube main body 81. Then, with each notch 93 facing the notch 89 of each connecting arm 85 of the rotary tube body 81 in a state where the rotary tube main body 81 and the rotary tube cover 82 are integrally attached, the connecting portion 70 is Each of the circular shaft support portions is rotatably supported.

  Each fixed body 69 is formed integrally with a member such as a synthetic resin, for example, and a fixed body main body 96 that fits into the opening 87, and a locking portion that protrudes from one end of the fixed body main body 96 and extends along the groove 73. 97 and an engaging claw portion 98 that protrudes from the other end of the fixed body 96 and engages with the inner peripheral surface of the rotary tube 68 (rotary tube main body 81). It is inserted into the groove 73. These fixed bodies 69 are integrally fixed to the rotary tube 68, and can be rotated together with the rotary tube 68 around the axis (around the axis C) with respect to the fixed tube 67.

  The fixed body 96 is partially inserted into the groove 73 while being fitted in the opening 87. In other words, the fixed body 96 projects from the outer periphery of the fixed tube 67 toward the central axis side (axis C side) of the fixed tube 67 in a state where the fixed body 96 is fitted in the opening 87, and rotates with the fixed tube 67. The pipes 68 are prevented from coming off from each other in the axial direction. Further, the fixed body 96 is positioned away from the outer edge of the opening 87 inward (center side of the rotary tube 68 (rotary tube main body 81)), and is covered with a cover 88. .

  The locking part 97 is inserted into the groove part 73, and for example, a coil spring 78 is held between the distal end side of the locking part 97 of one fixed body 69 and the wall part 77 in the groove part 73.

  The engaging claw portion 98, together with the locking portion 97, integrally fixes the fixed body 69 to the rotary tube 68 (rotary tube main body 81) and holds the fixed body 69 so as not to come out of the rotary tube 68. Further, the fixed body main body 96 on the back side of the engaging claw portion 98 can elastically deform the engaging claw portion 98 in both directions, in other words, the deformation range of the engaging claw portion 98 is reduced. A concave portion 99 to be set is formed.

  The connecting portion 70 is a portion that is detachably connected to the upstream end (tip) of the extension tube 22, is formed in a cylindrical shape having an axial direction along the front-rear direction, and is a direction orthogonal to the axial direction of the rotary tube 68 Is pivotally supported by the pivotal support portion of the rotary tube 68, so that the pivotable shaft 100 can be pivoted toward the pivotal cutout 90 and the counterrotation cutout 90. Therefore, for example, in the neutral position where the rotary tube 68 is not rotated with respect to the case body 31, the connecting portion 70 can be rotated in the vertical direction. At the position rotated around the center (around the axis C), the connecting portion 70 can be rotated in the left-right direction.

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

  When assembling the connecting pipe 32, first, the rear end 71a side of the fixed pipe main body 71 of the fixed pipe 67 is inserted into the rotary pipe main body 81 of the rotary pipe 68, and the groove 73 and each opening 87 are aligned. To do. Next, a coil spring 78 is inserted from each opening 87 into the groove 73 so that one end abuts against the wall 77. Further, the fixed body 69 is fitted into each opening 87. At this time, each fixed body 69 pushes the fixed body 96 into the opening 87 while inserting the locking portion 97 into the groove 73, and engages the engaging claw portion 98 with the inner peripheral surface of the rotary tube main body 81. . As a result, the fixed tube 67 and the rotary tube 68 are prevented from coming off in the axial direction, so that the rotary tube 68 can rotate relative to the fixed tube 67 about the axis (around the axis C). The coil spring 78 accommodated in the groove 73 is located between the locking portion 97 of the fixed body 69 and the wall portion 77. Thereafter, the opening 87 is closed by the cover 88. Then, the rotary tube main body 81 and the rotary tube cover 82 are fixedly attached to each other so that the rotating shaft 100 of the connecting portion 70 is sandwiched between the notches 89 and 93. As a result, the connecting portion 70 is pivotally supported so as to be rotatable in a direction intersecting (orthogonal) with the axis C with respect to the rotating tube 68, whereby the connecting tube 32 is completed.

  When assembling the floor brush 23, the traveling wheel 60, the electric motor 61, the control unit 62, etc. are assembled to the case portion constituting the case body 31, and the bearing bodies 56, 56 of the rotary brush 51 formed in advance are transmitted. A timing belt 65 is wound between one bearing body 56 and a pulley 64 that is pivotally supported on the bearing portions of the chamber 44 and the shaft support chamber 45 and attached to the rotary shaft 61a of the electric motor 61, and further, the connection pipe 32 is rotated. The tube 68 is assembled so as to be sandwiched by the case from above and below.

  When cleaning, the user first connects the hose body 21 to the main body suction port 19 of the vacuum cleaner body 12 through the connecting pipe portion 26, and performs a hand operation on the tip side of the hose body 21. The extension pipe 22 and the floor brush 23 are sequentially connected to the portion 27.

  Next, when the user who holds the grip portion 28 operates the predetermined setting button 29 in a state where the floor brush 23 is placed on the floor surface F and power can be supplied from the power supply portion to the main body control portion and the electric blower 18. The main body control unit controls the input of the electric blower 18 according to the operation mode set by the setting button 29, and the electric blower 18 is driven.

  Further, the user causes the floor brush 23 to run back and forth on the floor surface F, and thereby sucks dust together with air from the suction port 49 on the front end side of the floor brush 23 due to the negative pressure generated by driving the electric blower 18. At this time, the floor brush 23 is operated on the floor surface F so that the rotating pipe 68 (connection pipe 32) is, for example, around the axis (around the axis C) with respect to the fixed pipe 67 (case body 31). Alternatively, it rotates in a direction intersecting the axis C. When the rotating tube 68 (connecting tube 32) rotates in one direction around the axis with respect to the fixed tube 67 (case body 31), the one fixed body 69 fixed to the rotating tube 68 The coil spring 78 is compressed between the locking portion 97 and the wall portion 77 on the fixed tube 67 side (FIG. 2 (a)). In addition, when the rotating tube 68 (connection tube 32) rotates in the other direction around the axis with respect to the fixed tube 67 (case body 31), one fixed body fixed to the rotating tube 68. The 69 locking portions 97 are separated from the end of the coil spring 78, and the coil spring 78 has a natural length, for example (FIG. 2B).

  Further, the user appropriately rotates the rotating brush 51 according to the type of the floor surface F. At this time, when the user operates the predetermined setting button 29, the control unit 62 controls the input of the electric motor 61 according to the operation of the setting button 29, the electric motor 61 is driven, and the driving of the electric motor 61 is rotated. By being transmitted to the bearing body 56 via the pulley 64 and the timing belt 65 attached to the shaft 61a, the rotating brush 51 rotates, and the dust on the floor surface F is removed by the cleaning member 54.

  Then, the air sucked together with dust from the floor brush 23 becomes a suction wind, and the dust is carried from the main body suction port 19 to the dust collecting part through the extension pipe 22 and the hose body 21, and the dust is collected in this dust collecting part. Collect.

  Thereafter, the suction air from which the dust has been removed is sucked into the electric blower 18 and passes through the electric blower 18 to become exhaust air, and from the exhaust port (not shown) provided at the rear of the cleaner main body 12 or the like, the cleaner main body Exhausted to 12 outside.

  When cleaning is completed and the electric vacuum cleaner 11 is stored, the main body control unit stops the electric blower 18 by operating the setting button 29.

  For example, when the floor brush 23 is lifted from the floor surface F when the vacuum cleaner 11 is transported, the weight balance of the case body 31 is one side due to the weight of the electric motor 61 (the difference in weight between the electric motor 61 and the control unit 62). Therefore, when the floor brush 23 is lifted from the floor surface F, the case body 31 is easily rotated to one side with respect to the connecting pipe 32 (the rotating pipe 68 of the connecting pipe 32). For this reason, in the embodiment described above, the rotating tube 68 is coil coil spring 78 along the direction of the axis around the fixed tube 67 in the direction opposite to the electric motor 61 in the other side direction against the weight of the electric motor 61. In the floor brush 23 provided with the rotating brush 51 and the electric motor 61, the case body 31 is relative to the connecting pipe 32 (the rotating pipe 68 of the connecting pipe 32) when lifted due to the weight of the electric motor 61. It is possible to surely prevent a slight inclination (indicated by an imaginary line in FIG. 7).

  That is, in the above-described embodiment, the rotating tube 68 has a centering action for maintaining the rotating tube 68 in a neutral position relative to the fixed tube 67 by the weight of the electric motor 61 and the biasing force of the coil spring 78. . For example, when the rotary tube 68 is rotated relative to the fixed tube 67 so that the case body 31 is inclined to one side, for example, when the floor brush 23 collides with an obstacle during cleaning, the coil spring When the rotating tube 68 is rotated relative to the fixed tube 67 so that the inclination of the case body 31 is suppressed by the urging force of 78 and the case body 31 is inclined to the other side, the weight of the electric motor 61 The inclination of the body 31 is suppressed. Therefore, the inclination of the case body 31 when the floor brush 23 is lifted can be effectively suppressed, and the horizontal state with respect to the floor surface F can be easily maintained.

  Further, for example, during cleaning, in order to change the operation angle of the floor brush 23, the hand operating part 27 side is twisted on either of the left and right sides, and the extension tube 22 side is inclined with respect to the floor brush 23, That is, the rotary tube 68 may be rotated around the axis relative to the fixed tube 67 in some cases. At this time, when the floor brush 23 is lifted from the floor surface F in this state, the case body 31 is relatively moved by the urging force of the coil spring 78 when the case body 31 is inclined relatively to one side. When tilted to the side, the motor 61 can be automatically returned to the neutral position depending on the weight of the motor 61, and good operability can be obtained.

  Further, since the coil spring 78 does not become a sliding resistance when the rotary tube 68 rotates with respect to the fixed tube 67, the rotation of the rotary tube 68, that is, around the axis of the connection pipe 32 (around the axis C). Therefore, the operation of the floor brush 23 is good, for example, during cleaning, and this operability is maintained over a long period of time. it can.

  Specifically, a wall portion 77 projects from the inside of the groove portion 73 provided along the outer periphery of the fixed tube 67 inserted into the rotating tube 68, is attached to the opening portion 87 of the rotating tube 68, and is inserted into the groove portion 73. The coil spring 78 is accommodated in the groove portion 73 between the fixed body 69 and the wall portion 77, so that the fixed tube 67 is inserted into the rotary tube 68, and the coil spring 78 is inserted into the groove portion 73 using the opening 87. The connecting pipe 32 can be easily assembled simply by inserting and attaching the fixing body 69 to the opening 87.

  Further, by using the coil spring 78 as the biasing means, the floor brush 23 can be manufactured at a low cost, and by using a compression spring as the coil spring 78, both ends of the coil spring 78 are connected to the fixed body 69 and the wall 77. Therefore, it is not necessary to fix each of the connecting pipes 32, and the connecting pipe 32 can be easily assembled.

  Furthermore, by providing such a floor brush 23, the handling of the floor brush 23 at the time of cleaning is good, and even when the floor brush 23 is lifted, the case body 31 is difficult to tilt with respect to the connecting pipe 32, The vacuum cleaner 11 in which the floor brush 23 can be easily remounted without damaging the floor surface F can be provided.

  In the above embodiment, the wall 77 is projected at two locations of the groove 73 at positions symmetrical to the central axis (axial center C) of the fixed tube 67 (fixed tube main body 71), and coil springs are provided. 78 may be accommodated in the groove 73 between each fixed body 69 and each wall 77.

  The coil spring 78 is disposed between the locking portion 97 of one fixed body 69 and the wall portion 77, and is disposed between the engagement claw portion 98 and the wall portion 77 of the other fixed body 69. May be. In this case, the urging force of each coil spring 78 is set between the locking portion 97 and the wall portion 77 of one fixed body 69 according to the weight of the electric motor 61 (the difference in weight between the electric motor 61 and the control unit 62). By setting the urging force of the coil spring 78 between them to be larger than the urging force of the coil spring 78 between the engaging claw portion 98 and the wall portion 77 of one fixed body 69, the motor 61 is driven by these coil springs 78. If the rotating tube 68 is urged against the weight of the fixed tube 67 in the one side direction along the direction of the axis, the same effect as that of the above-described embodiment can be obtained. In addition, when the rotating tube 68 (connection tube 32) is rotated in one direction around the axis with respect to the fixed tube 67 (case body 31), and when rotated in the other direction, respectively. Since the urging force by the coil spring 78 is applied, the same operational feeling can be obtained even when turning in any direction.

  Furthermore, in the above embodiment, the fixed tube 67 is inserted into the rotating tube 68. However, the rotating tube 68 may be inserted into the fixed tube 67. In this case, the groove 73 and the wall 77 are provided in the rotary tube 68, the opening 87 is provided in the fixed tube 67, and the fixed body 69 is integrally attached to the fixed tube 67. There is an effect.

  Furthermore, the vacuum cleaner 11 is not limited to the canister type, and for example, a so-called upright type in which the connecting pipe 32 of the floor brush 23 is connected to the lower part of the vacuum cleaner body 12 that is long in the vertical direction is also supported. Can be used.

  Although one embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Vacuum cleaner
12 Vacuum cleaner body
18 Electric blower
23 Floor brush as inlet
31 Case body
32 Connection pipe
51 Rotating brush as rotating cleaning body
61 Electric motor
67 Fixed pipe
68 Rotating tube
69 Fixed body
73 Groove
77 Wall
78 Coil spring as biasing means
87 Opening C axis

Claims (3)

The case body,
A connecting pipe connected to the case body;
A rotating cleaning body rotatably disposed on the case body;
An electric motor housed in the case body at a position on one side with respect to the axial center of the connection pipe, and rotating the rotary cleaning body;
The connecting pipe is
A fixed tube attached so as not to rotate at least about the axis with respect to the case body;
A rotating tube connected to the fixed tube so as to be rotatable about an axis, and
An urging means for urging the rotating tube against the weight of the electric motor against the weight of the electric motor in the other direction along the direction of the axis. Suction port body. One of the fixed tube and the rotating tube is inserted into the other,
One of the fixed tube and the rotating tube has a groove provided along the outer periphery, and a wall protruding from the inside of the groove,
The other of the fixed tube and the rotating tube has an opening that opens along the direction intersecting the axis and communicates with the inside.
The connection pipe is attached to the opening and inserted into the groove, and includes a fixed body that prevents the fixed pipe and the rotary pipe from coming off,
The suction port body of the electric vacuum cleaner according to claim 1, wherein the biasing means is interposed between the fixed body and the wall portion and is accommodated in the groove portion. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising the suction port body according to claim 1 or 2, wherein the suction side of the electric blower communicates with a connection pipe.

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