JP2016152848A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner for restricting dust from entering a gap between a rotary pipe and a held tube at a position in one end part of the rotary pipe.SOLUTION: A floor brush 14 includes a suction port, a held tube 56, a rotary pipe 57, and an air passage part 59. The held tube 56 communicates with the suction port. One end side of the rotary pipe 57 is inserted to the held tube 56, and the rotary pipe is rotatably held in a direction to cross an axial direction. The air passage part 59 allows the held tube 56 to communicate with the rotary pipe 57. The rotary pipe 57 includes a rectification surface 85 arranged at the one end, advances to the inner side of the air passage part 59 by rotation with respect to the held tube 56, and guides air from a side close to a rotation shaft 75 of the rotary pipe 57 to a side far from the shaft.SELECTED DRAWING: Figure 1

Description

  Embodiment of this invention is related with the vacuum cleaner provided with the suction inlet body connected to the suction side of the electric blower of a vacuum cleaner main body.

  2. Description of the Related Art Conventionally, for example, some vacuum cleaners include a floor brush as a suction port placed on a surface to be cleaned. Such a floor brush includes a horizontally long case body and a connecting pipe that connects the case body to an extension pipe or the like. And such a floor brush is a case body with respect to the gap which does not enter the width of a case body, such as the gap between furniture, and the gap which obstructs an extension pipe etc., such as a gap under a bed. In order to be able to insert the connecting tube, the connecting tube is pivotally connected to the case body, and the orientation of the case body can be changed and the height of the extension tube can be reduced.

  Such a connecting pipe connects a part of the held pipe held on the case body side so as to be rotatable about the axis, and the rotating pipe is connected to the held pipe in a direction crossing the axial direction. By connecting in a rotatable manner, it can be rotated at various angles, and convenience is improved. However, for example, in the case of a vacuum cleaner that uses a battery (secondary battery) as a power source, the suction power tends to be weak compared to a vacuum cleaner that uses an external power source (commercial AC power source) as the power. When dust with a relatively large specific gravity cannot be sucked into the dust collecting part, it is possible to prevent the rotation of the rotating tube from entering the gap between the holding tube and the rotating tube through the connecting portion of the rotating tube. Desired.

JP 2012-24496 A

  The problem to be solved by the present invention is to provide a vacuum cleaner that makes it difficult for dust to enter the gap between the rotating tube and the holding portion at the position of one end of the rotating tube.

  The vacuum cleaner of an embodiment has a vacuum cleaner main body provided with an electric blower, and a suction port body communicating with the suction side of the electric blower. The suction port body includes a suction port, a holding portion, a rotating tube, and an air passage portion. The holding portion communicates with the suction port. One end side of the rotary tube is inserted into the holding portion, and the rotary tube is held so as to be rotatable in a direction crossing the axial direction. The air passage portion communicates the holding portion and the rotary tube. The rotating tube has a rectifying surface that is provided at one end and advances into the air passage portion by rotation with respect to the holding portion and guides air from the side near the rotation axis of the rotating tube to the far side.

It is sectional drawing which shows a part of suction inlet body of the vacuum cleaner of one Embodiment. It is a front view which shows a part of suction port body same as the above. It is a perspective view which sees through and shows a part of suction port body same as the above. It is a perspective view which shows a vacuum cleaner same as the above.

  The configuration of one embodiment will be described below with reference to FIGS.

  In FIG. 4, reference numeral 11 denotes a vacuum cleaner. This vacuum cleaner 11 is a so-called stick type (upright type) vacuum cleaner that a user uses while carrying the whole to clean dust on the surface to be cleaned. Machine.

  The vacuum cleaner 11 includes a vacuum cleaner body 12 which is a (one) air passage body, an extension pipe 13 connected to the vacuum cleaner body 12, and an extension pipe 13 connected to the surface to be cleaned. And a floor brush 14 as an (other) air passage body as a suction port body to be placed.

  The vacuum cleaner main body 12 includes, for example, a main body portion 21 and a dust collecting portion 22 that can be attached to and detached from the main body portion 21. The main body unit 21 includes a main body case 25 formed of synthetic resin or the like. Inside the main body case 25, there are an electric blower 27, a control means (control unit) 28 such as a microcomputer, and power sources thereof. A battery 29 and the like are accommodated. That is, the cleaner body 12 is provided with an electric blower 27, a control means 28, and a battery 29. The main body portion 21 is formed in a longitudinal shape, and a handle serving as a gripping portion as a hand operating portion for gripping operation that is operated by moving the floor brush 14 on the surface to be cleaned at one end portion in the longitudinal direction. A projecting portion 31 is provided, and a connecting portion 32 is provided on the other end portion in the longitudinal direction to which one end portion of the extension pipe 13 is inserted and connected. The main body 21 is used with both ends thereof being inclined in the vertical direction with the handle 31 held at the upper end. In addition, inside the main body 21 (main body case 25), a dust collection air passage section (not shown) that communicates from the connection section 32 to the dust collection section 22, and a dust collection section 22 communicates with the suction side of the electric blower 27. A communication air passage portion (not shown) is formed.

  In the present embodiment, for example, a rechargeable secondary battery is used as the battery 29. That is, the vacuum cleaner 11 of this embodiment is a rechargeable cordless cleaner. The battery 29 is disposed on the cleaner main body 12 (main body portion 21) at a position below (directly below) the handle 31, for example.

  On the handle 31, a setting button 36 as a setting means (setting unit) for setting the operation of the electric blower 27 and the like is arranged along the upper part. The setting button 36 is electrically connected to the control means 28, and the control means 28 drives and controls the electric blower 27 by conduction angle control or the like so as to perform the operation set by the setting button 36. It has become.

  The connection portion 32 is formed in a cylindrical shape, and a main body suction port 38 is opened on the distal end side. In addition, a clamp 39 that holds the extension pipe 13 detachably with respect to the cleaner body 12 (main body suction port 38) is provided on the upper portion of the connection portion 32.

  The main body suction port 38 is a portion that becomes an upstream end of the air passage portion, and communicates with the dust collection portion 22. Inside the main body suction port 38, a pair (not shown) of terminal portions (not shown) for electrically connecting the extension tube 13, the battery 29, the control means 28, and the like are exposed.

  The dust collecting unit 22 separates and collects dust sucked together with air by the operation of the electric blower 27, for example. The dust collecting unit 22 may be any type such as a filter or a unit that linearly separates, but in this embodiment, for example, a cylindrical shape that centrifuges (cyclone separation) dust, for example. Use a dust collection cup. The dust collecting portion 22 is detachable at a position below (in front of) the handle 31 at an upper portion on the lower end side of the main body portion 21, that is, an upper portion of the connection portion 32. The dust collecting portion 22 is arranged so as to be along the axial direction in the longitudinal direction of the main body portion 21 in a state of being attached to the main body portion 21.

  The extension pipe 13 is a long pipe section that connects the cleaner body 12 (main body section 21) and the floor brush 14. The extension pipe 13 has a base end side, which is one end side, inserted into the connection portion 32 (main body suction port 38) and is detachably held by a clamp 39. The clamp part 40 is disposed as a holding body that holds the detachable.

  As shown in FIGS. 1 to 4, the floor brush 14 is attachable to and detachable from the other end side of the extension tube 13, that is, the lower end portion opposite to the cleaner body 12. The floor brush 14 is integrally provided with a case body 45 that is long in the left-right direction, that is, a horizontally long case body 45, and a connecting pipe 46 that is provided so as to be rotatable with respect to the case body 45. Hereinafter, the traveling direction of the floor brush 14 on the surface to be cleaned is the front-rear direction, the horizontal direction perpendicular to the front-rear direction is the left-right direction, and the floor brush 14 is on the surface to be cleaned in the up-down direction. The description will be made with reference to the mounted state. In addition, with the floor brush 14 placed on the surface to be cleaned, the position of the handle 31 is a predetermined distance range (for example, 80 cm ±) defined by a predetermined standard such as JIS standard (JIS C9802) with respect to the surface to be cleaned. A state in which the connecting pipe 46 is inclined rearwardly and upwardly within a predetermined angle range with respect to the case body 45 so as to satisfy a general condition located at 5 cm) is referred to as a general state.

  In the case body 45, a suction port 51 is opened at a lower portion facing the surface to be cleaned, and the suction port 51 communicates with a suction chamber 52 provided in the case body 45. In the present embodiment, the suction port 51 is rotatably provided with a rotating brush (not shown) that is a rotary cleaning body as a drive unit. Further, in the case body 45, a motor 54 as a driving means (driving unit) for rotationally driving the rotating brush, and a control circuit unit 55 as a driving means control unit for controlling the driving of the motor 54, for example, a connection pipe It is housed in positions on both sides of 46. The case body 45 is divided into a plurality of case members, and these case members are formed by assembling each other. Note that the rotating brush, the motor 54, and the control circuit unit 55 are not essential components.

  The connecting pipe 46 includes a held pipe 56 as a holding portion held by the case body 45, and a rotating pipe 57 that is airtightly connected to the held pipe 56. The suction port 51 (suction chamber 52) is connected to the rear part of the unit. Further, the connection pipe 46 has a connection pin as a conductive portion electrically connected to a lead wire (not shown) wired from the cleaner body 12 (control means 28 and battery 29) side through the extension pipe 13. 58 and 58 are arranged. These connection pins 58 and 58 are electrically connected to a conductive wire (not shown) for supplying power to the motor 54 and the control circuit unit 55 and transmitting a signal from the cleaner body 12 side. An air passage portion 59 that communicates with the suction port 51 and the suction side of the electric blower 27 is formed inside the connection pipe 46. That is, the air passage portion 59 communicates the held tube 56 and the rotating tube 57. In the present embodiment, the connection pipe 46 includes the held pipe 56 and the rotary pipe 57. However, the held pipe 56 may be provided integrally with the case body 45, and the case body 45 However, in some cases, the case body 45 or the held tube 56 may be referred to as the case body 45 side.

  The held tube 56 is also referred to as a rotary tube A or the like, and is connected to a fixed tube portion 61 fixed to the case body 45 and to the fixed tube portion 61 so as to be rotatable about the axis. The rotation pipe portion 62 is provided and communicates with the suction port 51 (suction chamber 52). Further, an upstream side air passage portion 63 that communicates with the suction port 51 (suction chamber 52) and constitutes the upstream side of the air passage portion 59 is formed inside the held pipe 56.

  The fixed tube portion 61 is disposed in the case body 45 so as to have an axial direction along the front-rear direction, and the front end portion which is one end portion faces the rear portion of the suction chamber 52 and the suction chamber 52 (suction port). 51) It is a part that is airtightly connected to. Further, a fixed portion 65 sandwiched by the case body 45 is provided at the front end portion (the end portion opposite to the rotating tube portion 62) of the fixed tube portion 61 so as to protrude in a flange shape. Further, a restricting convex portion 66 for restricting the position of the front end portion of the rotating tube portion 62 is provided in a flange shape at a position behind the fixed portion 65 of the fixed tube portion 61. The restricting convex portion 66 is provided with an insertion opening 67 through which the conductive wire is inserted, penetrating in the front-rear direction at one side portion. Then, in the fixed pipe portion 61, the air passage upstream end portion 68 constituting the upstream side of the upstream air passage portion 63 is expanded toward the upstream side (front side) which is the suction port 51 side. Is provided.

  The rotating pipe part 62 is connected to the fixed pipe part 61 (the case body 45) in an airtight manner coaxially with the fixed pipe part 61 and to the rear end part which is the other end part of the fixed pipe part 61. On the other hand, it can be rotated around the axis. The upper part of the rotating tube part 62 is exposed to the outside (rear part) of the case body 45, and the lower part is supported by the case body 45. Further, inside the rotating tube portion 62, the front end side (upstream end side) of the rotating tube 57 is inserted, and a shaft supporting portion 71 that is rotatably supported by the rotating tube 57, and the shaft supporting portion 71 is continuously rotated. A restricting portion 72 that is a stopper portion that restricts the rotational position of the tube 57 is provided. The shaft support portion 71 and the restriction portion 72 constitute the downstream end of the upstream side air passage portion 63.

  The shaft support portion 71 is a portion that communicates with the air channel upstream end portion 68 of the fixed tube portion 61, and is provided so as to be continuous with the rear end portion (downstream end portion) of the air channel upstream end portion 68. The shaft support portion 71 has a cylindrical surface (one and the other) having an axial direction in a direction (left-right direction) intersecting (orthogonal) the rotation shaft 62a with respect to the rotation shaft 62a of the rotation tube portion 62. Slidable contact surfaces 71a and 71b and a shaft support surface 71c for supporting the rotary tube 57. The slidable contact surfaces 71a and 71b are positioned above and below the rotating tube portion 62 in a general state. Therefore, these sliding contact surfaces 71a and 71b are located on the side relatively near and the side far from the rotation shaft 75 of the rotary tube 57 described later. The shaft support surface 71c is located on the left and right in the rotary tube portion 62 in a general state.

  The restricting portion 72 protrudes toward the rotation shaft 62a (center axis) along the radial direction of the rotation tube portion 62, and the front end portion (upstream end portion) of the sliding contact surface 71b of the shaft support portion 71 and the fixed tube A step is formed between the rear end portion (downstream end portion) of the air passage upstream end portion 68 of the portion 61. The restricting portion 72 is located at the lower portion in the rotating tube portion 62 in a general state.

  The rotary tube 57 is also called a rotary tube B or the like, and includes rotary shafts 75 on both sides, and the rotary shafts 75 inside the held tube 56 (the rotary tube portion 62) on the case body 45 side ( It is connected to the shaft support portion 71 (the shaft support surface 71c) in a rotatable manner. Further, the rotating tube 57 includes a long cylindrical rotating tube main body 76, and a cover body 77 and a shutter portion 78 that are integrally attached to the rotating tube main body 76. In addition, the inside of the rotary pipe 57 is connected to the suction port 51 (suction chamber 52) (via the held pipe 56), and the downstream side wind that is the air passage part that constitutes the downstream side of the air passage part 59. A path portion 79 is formed. On the front end side, which is the upstream end side of the rotary tube 57, pipe sliding contact portions 80 and 81 that are in sliding contact with the sliding contact surfaces 71a and 71b on the case body 45 side are formed vertically. Yes.

  The rotating shaft 75 is formed in a cylindrical shape, and the conductive wire is inserted into one rotating shaft 75 located on one side and led out to the outside. In addition, the rotation shaft 75 is located at one side of the front end portion of the rotary tube 57 with respect to the central axis 57a of the rotary tube 57, and is biased upward in the general state.

  The rotary tube main body 76 includes an inclined surface 84 at the upstream end (front end) and a rectifying surface 85 continuous to the front, which is the upstream side of the inclined surface 84, inside the partitioning the downstream air passage portion 79. ing. The front end, which is the upstream end of the rotary tube main body 76, is a contact portion 86 that can contact the restriction portion 72 on the case body 45 side.

  The inclined surface 84 is formed so as to gradually approach the center shaft 57a side from the front side which is the upstream side to the rear side which is the downstream side. Therefore, the inclined surface 84 is formed so as to improve the flow velocity by restricting the air to the downstream side. The inclined surface 84 is located in the rotary tube 57 (rotary tube main body 76) in the general state, that is, at the upper portion of the downstream air passage portion 79. Therefore, the inclined surface 84 is located on one side with respect to the central axis 57a of the rotating tube 57, that is, on the rotating shaft 75 side (side relatively close to the rotating shaft 75).

  The rectifying surface 85 constitutes an upstream end surface of the rotary tube 57, and extends radially outward from the front end portion of the inclined surface 84, that is, opposite to the central axis 57a. The rectifying surface 85 is located in the rotary tube 57 (rotary tube main body 76) in the general state, that is, above the downstream side air passage portion 79. For this reason, the rectifying surface 85 is located on one side with respect to the central axis 57a of the rotating tube 57, that is, on the rotating shaft 75 side. Further, the rectifying surface 85 is in a state where the rotary tube 57 is rotated relatively upward, that is, in a state where the contact portion 86 is separated from the restricting portion 72, and the central axis of the rotary tube 57 toward the downstream side. Inclined toward 57a. That is, in the general state, the rectifying surface 85 is inclined toward the lower rear side. Therefore, the rectifying surface 85 is on the opposite side to the central axis 57a of the rotating tube 57, in other words, the rotating shaft without blocking the air that has passed through the air passage portion 59 (upstream air passage portion 63). It is possible to guide to the far side from 75.

  The cover body 77 covers the rotary tube main body 76 along the axial direction, and is positioned on the upper portion of the rotary tube main body 76 in a general state. Between the cover body 77 and the rotary tube main body 76, a conductive wire accommodating portion 87 for accommodating the conductive wire therein is defined. The conductive wire accommodating portion 87 communicates with the one side rotation shaft 75. Further, the front end portion of the cover body 77 constitutes a semi-cylindrical tube-sliding contact portion 80 having an axial direction in the direction (left-right direction) intersecting (orthogonal) with the central axis 57a, and the connecting pipe 46 ( The tube sliding contact portion 80 is slidably contacted with the sliding contact surface 71a by the rotation of the rotating tube 57) with respect to the case body 45 side (held tube 56), thereby rotating with the held tube 56 (upstream air passage portion 63). An airtight connection with the pipe 57 (downstream air passage section 79) is maintained.

  The shutter portion 78 covers the opposite side of the cover body 77 on the front end side, which is the upstream end side of the rotary tube main body 76, that is, the side relatively far from the rotating shaft 75. The shutter portion 78 constitutes a semi-cylindrical tube-sliding contact portion 81 having an axial direction in the direction (left-right direction) intersecting (orthogonal) with the central axis 57a, and the connecting tube 46 (the rotating tube 57). ) With respect to the case body 45 side (held tube 56), the tube sliding contact portion 81 comes into sliding contact with the sliding contact surface 71b, so that the held tube 56 (upstream air passage portion 63) and the rotary tube 57 ( An airtight connection with the downstream air passage 79) is maintained.

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

  When cleaning, connect the proximal end of the extension tube 13 to the vacuum cleaner main body 12 (connector 32 (main body suction port 38)) and detachably lock it with the clamp 39. The connecting pipe 46 of the floor brush 14 is inserted and connected to the distal end side of the pipe 13 and is detachably locked and held by the clamp portion 40. In this state, the floor brush 14 communicates with the suction side of the electric blower 27 (via the extension pipe 13, the main body suction port 38, and the dust collecting part 22). Also, the connection pins 58 and 58 of the floor brush 14 are electrically connected to the extension pipe 13 side, and the cleaner body 12 side (the control means 28 and the battery 29 is connected via a lead wire wired in the extension pipe 13. As a result, a signal and a power source can be sent from the cleaner body 12 side to the motor 54 and the control circuit unit 55.

  In the vacuum cleaner 11, the user holding the handle 31 places the floor brush 14 on the surface to be cleaned. At this time, the height position of the handle 31 from the surface to be cleaned is generally in the range of, for example, 70 to 90 cm, although there are variations among users. Therefore, in a state where the electric vacuum cleaner 11 is used, the connecting pipe 46 of the floor brush 14 is in a general state where the connecting pipe 46 is inclined rearwardly and upwardly with respect to the case body 45 at a predetermined angle. For this reason, as shown in FIG. 1, the rear side, which is the downstream side of the rotating tube 57, is rotated upward and the upstream side is positioned below, and the air passage portion 59 is one end of the rotating tube 57 on the case body 45 side. At the position of the upstream end portion (front end portion) that is the portion, in other words, at the position between the held tube 56 and the rotating tube 57, it is bent into an L shape. In this state, the rectifying surface 85 is located at a relatively upper position in the air passage portion 59, and advances into the air passage portion 59 toward the central axis 57a, at the downstream end of the upstream air passage portion 63. opposite. Then, the user drives the electric blower 27 by the operation set by operating the setting button 36 provided on the handle 31, and the floor brush 14 is moved forward and backward, diagonally, etc. on the surface to be cleaned. While being driven alternately, dust on the surface to be cleaned is sucked in using negative pressure generated by driving the electric blower 27. That is, the negative pressure generated by the driving of the electric blower 27 includes the communication air passage portion, the dust collection portion 22, the dust collection air passage portion, the main body suction port 38, the extension pipe 13, and the floor brush 14 (the air passage portion 59, the suction chamber). 52 and the suction port 51), and dust is sucked together with air from the suction port 51 of the floor brush 14. The sucked dust flows from the suction chamber 52 through the air passage portion 59 to the extension pipe 13, and then is carried to the dust collecting section 22 through the extension pipe 13 to be separated from the air and captured. Be collected. The air from which the dust has been separated is sucked into the electric blower 27 to cool the electric blower 27 and then exhausted from the exhaust port (not shown) to the outside of the cleaner body 12.

  Note that the user can also rotate the rotating brush of the floor brush 14 in accordance with the degree and type of dirt on the floor surface. That is, when the user operates the predetermined setting button 36, a signal is generated by the control means 28, and the signal together with the power via the lead wire and the conductive wire passes through the extension pipe 13 and the control circuit unit 55 of the floor brush 14 And supplied to the motor 54. Therefore, the control circuit unit 55 controls the drive of the motor 54 to rotate the motor 54 to rotate the rotating brush, and the rotating rotating brush scrapes off dust and the like that has entered the floor surface.

  Here, when the floor brush 14 travels in the front-rear direction on the surface to be cleaned, the distance in the front-rear direction between the handle 31 gripped by the user and the floor brush 14 changes, so the angle of the extension tube 13, that is, the floor brush The angle of 14 connecting pipes 46 (rotating pipes 57) changes (imaginary line in FIG. 1). Accordingly, the tube sliding contact portions 80 and 81 of the rotating tube 57 are in sliding contact with the sliding contact surfaces 71a and 71b of the held tube 56 on the case body 45 side, and the contact portion 86 approaches (contacts) the restriction portion 72. And repeat. That is, at the position of the restricting portion 72, the downstream side of the upstream side air passage portion 63 on the held tube 56 side, which is the case body 45 side, and the sliding contact surface 71b are expanded in a stepped shape. Thus, in the embodiment described above, the front end portion (upstream end portion) which is one end portion of the rotating tube 57 advances into the air passage portion 59 by the rotation with respect to the held tube 56 and the rotating tube 57 rotates. By providing the rectifying surface 85 that guides air from the side close to the shaft 75 to the far side, the rectifying surface 85 narrows the inner diameter dimension of the air passage portion 59 and not only increases the air flow rate, but also the rectifying surface 85 Invoke air, change the flow so that this air is guided to the opposite side, that is, the side far from the rotating shaft 75, in other words, from the inside to the outside of the bent air passage portion 59, and turbulence is less likely to occur, and exposure On the sliding contact surface 71b, air whose flow velocity is increased is applied and flows to the downstream air passage portion 79, and fine dust such as dust and sand is prevented from accumulating on the sliding contact surface 71b (FIG. 1). Arrow A). As a result, it becomes difficult for dust to enter the gap between the rotary tube 57 and the held tube 56 at the position of the front end portion of the rotary tube 57.

  Specifically, the air flow path portion 59 in a state where the rectifying surface 85 is rotated to the position where the handle 31 is 80 cm from the surface to be cleaned with respect to the case body 45 side (held tube 56). In the electric vacuum cleaner 11 in a use state in which the user grips the handle 31 and places the floor brush 14 on the surface to be cleaned, the front end of the rotary tube 57 as described above It is possible to reliably suppress dust from entering the gap between the rotary tube 57 and the case body 45 (held tube 56) at the position of the portion.

  For this reason, it is possible to prevent fine dust from entering the gap between the rotary tube 57 and the held tube 56, and to prevent the dust from being caught when the rotary tube 57 rotates with respect to the held tube 56. Therefore, the rotating tube 57 can be rotated more smoothly, the operability is good, and the noise generated by rubbing the dust between the rotating tube 57 and the held tube 56 is generated. Hard to occur.

  In particular, in the case of the vacuum cleaner 11 using the battery 29 as a power source, considering the duration of cleaning and the like, it is not easy to increase the suction force of the electric blower 27. The case where power is insufficient is considered. Therefore, by increasing the air flow velocity by changing the inner diameter of the air passage portion 59 without increasing the suction force of the electric blower 27 by the electric power by the rectifying surface 85, the flow is changed and the dust is sucked up. Also in the rechargeable vacuum cleaner 11 using the battery 29, dust can be reliably prevented from entering the gap between the rotary tube 57 and the held tube 56 at the position of the front end of the rotary tube 57.

  Further, the rectifying surface 85 is inclined toward the central axis 57a side of the rotating tube 57 toward the downstream side in a state where the rotating tube 57 is rotated to a position separated from the restricting portion 72. Without blocking air by 85, it can be guided to the opposite side to the central axis 57a of the rotary tube 57, in other words, to the side far from the rotary shaft 75, and generation of turbulence and wind noise can be suppressed. , It is possible to suppress a reduction in suction efficiency due to turbulent flow.

  Further, since the inclined surface 84 is continuously formed on the downstream side of the rectifying surface 85, the flow velocity when the air guided by the rectifying surface 85 flows to the downstream air passage portion 79 (rotating pipe 57) can be further increased. The dust located on the sliding contact surface 71b at the front end of the rotary tube 57 can be sucked more smoothly together with the air.

  In the above embodiment, the vacuum cleaner 11 is a so-called canister type in which the floor brush 14 is connected to the cleaner body 12 that can run on the surface to be cleaned, for example, via the hose body and the extension pipe 13. But you can. In this case, it can comprise similarly to the said one embodiment by providing a hand operation part in a hose body.

  Further, although the so-called rechargeable vacuum cleaner 11 using the battery 29 as a power source is used, a cord reel device or the like may be used as a power source, and the power may be taken from an external power source such as a commercial AC power source. In this case, by applying the configuration of the above-described embodiment, the rotating tube 57 is positioned at one end of the rotating tube 57 in an operation mode in which the suction force is suppressed, such as a weak operation. It is possible to make it difficult for dust to enter the gap between the pipe 56 and the held pipe 56.

  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
14 Floor brush as suction port
27 Electric blower
29 Battery as power source
31 Handle as hand control
51 Suction port
56 Retained tube as holding part
57 Rotating tube
59 Air passage
75 Rotating axis
85 Rectifying surface

Claims (3)

A vacuum cleaner body equipped with an electric blower;
A suction port body communicating with the suction side of the electric blower,
The suction port is
The inlet,
A holding portion communicating with the suction port;
One end side is interpolated with respect to this holding part, and a rotary tube held rotatably in a direction intersecting the axial direction,
An air passage portion communicating with the holding portion and the rotary tube;
The rotary tube has a rectifying surface that is provided at one end and advances into the air passage portion by rotation with respect to the holding portion and guides air from a side closer to a rotation axis of the rotary tube to a side far from the rotation axis. A vacuum cleaner characterized by that. Provided with a hand control unit for operating the suction port on the surface to be cleaned,
The rectifying surface advances into the air passage portion in a state in which the rotary tube is rotated relative to the holding portion to a position where the position of the hand operating portion is 80 cm from the surface to be cleaned. Electric vacuum cleaner. The electric vacuum cleaner according to claim 1 or 2, further comprising a battery serving as a power source for the electric blower.

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