JP6662573B2 - Vacuum cleaner and its suction body - Google Patents

Description

  The embodiment of the present invention relates to a suction port of a vacuum cleaner having a rotary cleaning body rotatably provided in a suction chamber, and a vacuum cleaner having the same.

  2. Description of the Related Art Conventionally, for example, there is an electric vacuum cleaner provided with 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 connection pipe connecting the case body to an extension pipe or the like. A suction chamber communicating with the connection pipe is formed inside the case body, and a horizontally long suction port is opened at a lower portion of the suction chamber facing the surface to be cleaned. Then, dust on the surface to be cleaned is sucked into the connection pipe through the suction chamber together with air from the suction port by the negative pressure generated by driving the electric blower disposed in the cleaner body.

  Normally, in the floor brush, the connection pipe is arranged at the center in the longitudinal direction of the case body in consideration of operability and the like. The suction force of the electric blower decreases as the distance from the connecting pipe communicating with the suction side of the electric blower decreases, so that both ends of the suction port, which is relatively far from the connecting pipe, are compared with the center of the suction port. The suction tends to be weak. In particular, in the case of a so-called cordless type vacuum cleaner that uses a battery as a power source, it is not easy to increase the suction force of the electric blower, and the above-described tendency is conspicuously accompanied by a decrease in the battery voltage. easy.

  Therefore, a slope is provided on the ceiling surface of the suction chamber where the suction port is opened so that the height gradually decreases from the center to the both ends, and the pressure distribution in the suction chamber is made uniform and suction at both ends is performed. It can be improved.

  However, when cleaning a type of cleaning surface into which dust enters, such as a carpet, for example, it is necessary to not only suck the dust by negative pressure, but also to sweep out the dust from the cleaning surface. It is preferable that the rotary cleaning member is rotatably arranged facing the mouth. In this case, in order to incline the ceiling surface of the suction chamber so as not to interfere with the rotary cleaning body, the ceiling surface of the suction chamber needs to be raised as a whole, which not only increases the size of the floor brush, but also increases the size of the suction chamber. The negative pressure decreases, and it becomes difficult to obtain a sufficient suction force.

JP-A-7-322982

  The problem to be solved by the present invention is to provide a suction port body of a vacuum cleaner capable of improving dust suction from a suction port while enabling dust to be cleaned on a surface to be cleaned using a rotary cleaning body, and a suction port body provided with the suction port body. It is to provide a vacuum cleaner.

The suction port body of the vacuum cleaner of the embodiment has a case body elongated in the width direction, and a connection pipe connected to a rear portion of the case body and communicating with a suction side of the electric blower. It is. The suction port includes a suction chamber, a rotary cleaning body, and a transfer chamber. The suction chamber is partitioned along the width direction inside the case body, and has a suction port opened at a lower portion facing the surface to be cleaned. The rotary cleaning body has an axial direction along the width direction of the case body and is rotatably provided in the suction chamber. The transfer chamber has a communication opening located closer to the connection pipe than the suction port, and communicates with the downstream side of the suction chamber through the communication opening to be partitioned along the width direction inside the case body. The transfer chamber has a lower surface that is continuous from the suction chamber and a ceiling surface that is inclined downward in the width direction separated from the connection pipe from a position facing the connection pipe . The lower surface is curved so that the suction chamber side goes down toward the suction chamber in an arc shape .

(a) is a longitudinal side view showing the suction opening of the vacuum cleaner of one embodiment, (b) is a vertical front view showing the same suction opening. It is a perspective view which shows a part of case body of a suction port same as the above from below. FIG. 2 is a perspective view showing a part of the same case body as seen through. It is a perspective view which shows the vacuum cleaner provided with the suction port body same as the above.

  Hereinafter, a configuration of an embodiment will be described with reference to FIGS. 1 to 4.

  In FIG. 4, reference numeral 11 denotes an electric vacuum cleaner, and the electric vacuum cleaner 11 constitutes an electric vacuum cleaner together with a support device (charging stand) (not shown) for supporting the electric vacuum cleaner 11 in a storage state not used for cleaning. It is.

  The electric vacuum cleaner 11 has a so-called stick including a cleaner main body 12, and an air passage body 15 including an extension pipe 13 directly connected to the cleaner main body 12 and a floor brush 14 as a suction opening body. It is a type of vacuum cleaner.

  The cleaner main body 12 includes, for example, a main body 21 and a dust collecting device 22 that is a dust collecting unit that is detachable from the main body 21. The main body unit 21 includes a main body case 25 formed of a synthetic resin or the like, and inside the main body case 25, an electric blower 27, a control unit (control unit) 28 such as a microcomputer, for example, Battery 29 and the like are accommodated. That is, the cleaner body 12 is provided with the electric blower 27, the control means 28, and the battery 29. Further, the main body portion 21 is formed in a longitudinal shape, and a grip portion 31 for grip operation for moving and operating the floor brush 14 on the surface to be cleaned is protrudingly provided at one end portion in the longitudinal direction. A connecting portion 32 as a dust sucking portion into which one end of the extension tube 13 is inserted and connected is protruded from the other end of the connecting tube. The main body 21 is used with both end sides vertically inclined along a state in which the holding part 31 is held as the upper end side. Further, inside the main body 21 (main body case 25), a dust collecting air passage (not shown) communicating from the connecting portion 32 to the dust collecting device 22 and the suction side of the electric blower 27 from the dust collecting device 22 are connected. And a communicating air path (not shown).

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

  The gripper 31 is also called a hand operation unit or a handle.In the gripper 31, a setting button 36 as setting means (setting unit) for setting the operation of the electric blower 27 and the like is arranged along the upper part. Have been. The setting button 36 is electrically connected to the control unit 28, and the control unit 28 controls the drive of 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 part 32 is formed in a cylindrical shape, and has a main body connection port 38 opened at the distal end side. In addition, a clamp 39 for detachably holding the extension pipe 13 with respect to the cleaner main body 12 (main body connection port 38) is provided above the connection portion 32.

  The main body connection port 38 is a portion serving as an upstream end of the air passage, and communicates with the dust collecting device 22. A pair of (not shown) terminal portions (not shown) for electrically connecting the extension tube 13, the battery 29, the control means 28, and the like are exposed inside the main body connection port 38.

  The dust collecting device 22 separates and collects dust sucked in with the air by the operation of the electric blower 27, for example. As the dust collecting device 22, for example, a device using a filter or a device that separates linearly can be used, but in the present embodiment, for example, centrifugal separation of dust (cyclone separation), cylindrical shape Use a dust collection cup. The dust collecting device 22 can be attached to and detached from the lower end side of the main body portion 21, that is, the upper portion of the connecting portion 32, at a position below (front of) the grip portion 31. The dust collecting device 22 is arranged so as to extend along the longitudinal direction of the main body 21 in the axial direction while being attached to the main body 21.

  The extension tube 13 is a long tube that connects the cleaner body 12 (the body 21) and the floor brush 14. The extension tube 13 has a base end, which is one end side, inserted into the connection portion 32 (main body connection port 38) and is detachably held by a clamp 39. Is provided as a holding body for detachably holding the holding member.

  As shown in FIGS. 1 to 4, the floor brush 14 is detachable from the other end of the extension tube 13, that is, the lower end which is the end opposite to the cleaner body 12. The floor brush 14 integrally includes a case body 45 that is long in the width direction that is the left-right direction, that is, a horizontally long case body, and a connection pipe 46 that is rotatably protruded from the case body 45. . Hereinafter, the traveling direction of the floor brush 14 on the surface to be cleaned is referred to as a front-rear direction, and a horizontal direction perpendicular to the front-rear direction is referred to as a left-right direction. The description will be made with reference to the state of being placed above.

  In the case body 45, a suction chamber 51 and a transfer chamber 52 which communicate with each other are partitioned in front and rear inside, and a suction port 51 having a widthwise length, that is, a horizontally long suction port is formed at a lower portion of the suction chamber 51 facing the surface to be cleaned. An opening 53 is provided, and a connecting pipe 46 is connected to the rear of the transfer chamber 52. In the case body 45, a rotary cleaning body 54 is rotatably arranged inside the suction chamber 51. Further, in the case body 45, a motor 55 as a driving unit (driving unit) that rotationally drives the rotary cleaning body 54, and a control circuit unit 56 as a driving unit control unit that controls driving of the motor 55 are provided. For example, it is accommodated in the position on both sides of the rear portion sandwiching the connection pipe 46. Further, the case body 45 includes a lower surface portion 57 facing the surface to be cleaned, a side surface portion 58 rising from an outer edge of the lower surface portion 57, a partition wall portion 59 protruding upward from the lower surface portion 57, and an inner portion. And an upper surface portion 60 that constitutes the upper side of. The case body 45 is roughly divided into a lower case 63 as a first case body, an upper case 64 as a second case body, and sandwiched between the lower case 63 and the upper case 64. The lower case 63, the upper case 64, and the bumper 65 are formed by assembling the lower case 63, the upper case 64, and the bumper 65 with each other.

  The suction chamber 51 is also referred to as a brush chamber, and is the most upstream portion of an air passage (air passage body 15) that sucks dust-containing air through the suction port 53. The suction chamber 51 is located in front of the floor brush 14 (case body 45), and is longitudinally partitioned along the left-right direction of the floor brush 14 (case body 45).

  The transfer chamber 52 is partitioned adjacent to the rear of the suction chamber 51. The transfer chamber 52 is located substantially at the center of the floor brush 14 (case body 45) in the front-rear direction, and is formed in a longitudinal shape along the left-right direction of the floor brush 14 (case body 45). The transfer chamber 52 has a smaller volume than the suction chamber 51. Further, the transfer chamber 52 has substantially the same width dimension (horizontal dimension) as the suction chamber 51, and the center position in the left and right direction is not shifted from the suction chamber 51 in the left and right direction. Are arranged substantially coincident with the center position in the left-right direction. The transfer chamber 52 communicates with the downstream side of the suction chamber 51. In the present embodiment, the entirety of the transfer chamber 52 in the left-right direction communicates with the downstream side of the suction chamber 51.

  The suction port 53 is formed in a substantially rectangular shape. The size of the suction port 53 is smaller than that of the suction chamber 51 in the left-right direction and the front-rear direction. The suction port 53 allows a part of the rotary cleaning body 54 to be exposed facing the surface to be cleaned.

  The rotary cleaning body 54 is called a rotary brush or an agitator, and includes a long shaft 67 and, for example, a plurality of cleaning members 68 disposed around the shaft 67. The rotary cleaning body 54 is arranged in the suction chamber 51 so as to have an axial direction along the left-right direction (width direction) that is the longitudinal direction of the suction chamber 51.

  Both ends of the shaft 67 are rotatably held on both sides inside the case body 45 via bearings (not shown).

  The cleaning member 68 is made of, for example, a blade or brush bristles, protrudes radially with respect to the shaft portion 67, and is disposed apart from each other in the circumferential direction of the shaft portion 67, and both ends of the shaft portion 67. It is provided in a state where it is spirally twisted across.

  The motor 55 is arranged so that a rotating shaft 55a, which is an output shaft, extends in the left-right direction. An endless timing belt 69 as a transmission means for transmitting the driving force of the motor 55 to the rotary cleaning body 54 is wound between the rotary shaft 55a of the motor 55 and one bearing of the rotary cleaning body 54. It is hung.

  As the control circuit unit 56, for example, a circuit board on which a control circuit of the motor 55 is mounted is used. The control circuit 56 and the motor 55 are each supplied with electric power from the battery 29 housed in the cleaner body 12.

  The lower surface portion 57 includes a suction chamber lower surface portion 71 that forms a lower surface of the suction chamber 51, a wind guide lower surface portion 72 that forms a lower surface extending between the suction chamber 51 and the transfer chamber 52, and a protrusion located at a lower portion of the connection pipe 46. And a lower surface portion 73. In the lower surface portion 57, the suction chamber lower surface portion 71 and the air guide lower surface portion 72 as a whole form a horizontally long rectangular shape, and the protruding lower surface portion 73 protrudes rearward from a substantially central portion in the left-right direction. Thereby, it is formed in a convex shape when viewed from above.

  The suction chamber lower surface portion 71 constitutes a lower surface on the front side of the suction port 53 of the suction chamber 51, is located at the front of the suction port 53, and is directed toward the suction port 53, that is, downward toward the rear side. It is formed to be curved in an arc shape (cylindrical surface shape). The suction chamber lower surface 71 is provided over the entire left-right direction that is the longitudinal direction of the suction port 53.

  The air guide lower surface portion 72 constitutes the lower surface of the transfer chamber 52 from the lower surface (downstream side) behind the suction port 53 of the suction chamber 51, is located at the rear of the suction port 53, and from this suction port 53, For example, an arc shape (cylindrical surface shape) toward the lower end side of the upstream end of the connection pipe 46 gradually upward toward the rear (downstream side) across the partition wall portion 59 located behind the suction port 53. It is formed to be curved. The air guide lower surface 72 guides the dust-containing air to flow smoothly from the suction chamber 51 to the connection pipe 46 via the transfer chamber 52. The air guide lower surface portion 72 may be formed to be linearly inclined upward toward the rear.

  The protruding lower surface portion 73 has a cutout portion 75 formed at the rear end, and a running wheel 76 for running the floor brush 14 smoothly on the surface to be cleaned is formed in the cutout portion 75 along the left and right direction. It is axially supported, that is, rotatably supported in the front-rear direction.

  The side surfaces 58 are provided on the front, both sides, and both sides of the rear protruding lower surface 73 of the lower surface 57.

  The partition wall portion 59 partitions the rear portion of the transfer chamber 52, and protrudes upward from the lower surface portion 57 along the left-right direction at a position separated rearward from the suction port 53. This partition wall portion 59 is located at the rear end of the air guide lower surface portion 72 of the lower surface portion 57. The partition wall 59 supports a lower portion of the upstream end (front end) of the connection pipe 46, and a fitting portion 78 into which the upstream end of the connection pipe 46 is fitted supports the connection pipe 46. A notch is formed at the upper end of the portion to be formed. The fitting portion 78 is located substantially at the center of the partition wall portion 59 in the left-right direction. The upper end of the air guide lower surface 72 is located at the lower edge of the fitting portion 78.

  The upper surface portion 60 includes a suction room ceiling surface portion 81 that forms the ceiling surface of the suction room 51, a partition screen portion 82 that is continuous with the suction room ceiling surface portion 81 and that forms an upper front portion of the transfer room 52, and a transfer room 52. And a transfer room ceiling surface portion 83 which constitutes a ceiling surface.

  The suction chamber ceiling surface 81 is a portion that is spaced above and opposed to the suction chamber lower surface 71 of the suction chamber 51 and the suction port 53. The suction chamber ceiling surface 81 is formed in an arc shape (semi-cylindrical surface shape) so as not to interfere with the rotary cleaning body 54 (cleaning member 68). The suction chamber ceiling surface 81 has a front end facing the front end of the suction chamber lower surface 71 via a bumper 65 and a rear end near the middle position between the front and rear ends of the air guide lower surface 72. It is located above and opposite the windward surface 72. Therefore, a communication opening 85 that connects the suction chamber 51 and the transfer chamber 52 is provided between the rear end of the suction chamber ceiling surface 81 and the wind guide lower surface 72. This communication opening 85 is located slightly rearward above the rear edge of the suction port 53 (downstream of the flow of dust-containing air), and is formed in a slit shape extending longitudinally along the left-right direction. The opening amount is smaller than that of the suction port 53, and the air path is narrowed to increase the flow rate of the dust-containing air flowing from the suction chamber 51 to the transfer chamber 52. Further, a large number of reinforcing ribs 86 extending in the front-rear direction are provided on the suction chamber ceiling surface 81 so as to be spaced apart from each other in the left-right direction and project downward.

  The ku screen section 82 is provided continuously from the upper part of the rear end of the suction room ceiling surface section 81 vertically upward. The upper end portion of the section screen portion 82 is formed to be curved so as to be continuous with the front portion of the transfer room ceiling surface portion 83 in an arc shape.

  The transfer chamber ceiling surface portion 83 has a curved portion 88 that is curved in an arc shape along the shape of the front end portion of the connection tube 46 at the center in the left-right direction facing the front end portion of the connection tube 46. Inclined portions 89, 89 which are respectively inclined downward in the left-right direction from both ends of the curved portion 88 are integrally formed.

  The curved portion 88 is convex upward so that both end portions are located below the central portion. That is, the curved portion 88 is bent downward in the left-right direction from the center portion in the left-right direction (width direction) so as to protrude upward toward the center portion in the left-right direction (width direction). Is formed. Therefore, the center in the left-right direction of the curved portion 88 is the highest portion in the transfer room ceiling surface portion 83. The curved portion 88 is located along the upper edge of the front end of the connection pipe 46. Therefore, the transfer room ceiling surface 83 has a height equal to or lower than the upper edge of the connection pipe 46 as a whole. Further, the curved portion 88 is gradually inclined upward toward the upper edge portion of the front end portion of the connection pipe 46 continuously from the section screen section 82 to the downstream side, that is, the rear side, which is the connection pipe 46 side. It is curved so that

  The inclined portions 89, 89 gradually move downward from the position facing the front end (upstream end) of the connection pipe 46 in the left-right direction separated from the connection pipe 46 as the distance from the bending section 88 increases. It is inclined. Therefore, the ends of the inclined portions 89, 89 on the opposite side to the curved portion 88 are the lowest portions of the inclined portions 89, 89, respectively. It is located below the center of the front end of the pipe 46 and above the rear end (communication opening 85) of the suction chamber ceiling 81. In the present embodiment, the transfer chamber 52 is formed such that the height of both ends in the longitudinal direction is about half of the height of the center in the left-right direction facing the front end of the connection pipe 46 due to the inclined portions 89, 89. Has become.

  The lower case 63 is formed of, for example, a hard synthetic resin, and the suction port 53 is opened toward the front side, and the lower surface portion 57 (the suction chamber lower surface portion 71, the wind guide lower surface portion 72, and the projecting lower surface portion 73) and the side surface The unit 58 is integrally provided.

  The upper case 64 is formed of, for example, a hard synthetic resin or the like, and in the present embodiment, the front upper portion as one case member integrally including the upper surface portion 60 (the suction room ceiling surface portion 81 and the transfer room ceiling surface portion 83). A case 91 and a rear upper case 92 as another case member fixed integrally with the front upper case 91 are provided. The rear end of the front upper case 91 is integrally fixed to the front end of the rear upper case 92 in a state of being overlapped from below.

  The bumper 65 is formed of a soft synthetic resin such as an elastomer, for example, and is continuous in a U-shape from both sides of the case body 45 to the front.

  On the other hand, the connection pipe 46 includes a held pipe 94 held by the case body 45 and a rotating pipe 95 air-tightly connected to the held pipe 94, and is provided at a rear portion of the center of the case body 45 in the left-right direction. It is connected and communicates directly with the transfer chamber 52, and through this transfer chamber 52, communicates with the suction chamber 51 and the suction port 53. Further, the connection pipe 46 has a connection pin as a conductive portion that is electrically connected to a lead wire (not shown) that is wired from the cleaner body 12 (the control unit 28 and the battery 29) side via the extension pipe 13. 96, 96 are arranged. These connection pins 96, 96 are electrically connected to a conductive wire (not shown) for supplying power to the motor 55 and the control circuit unit 56 and for transmitting a signal from the cleaner body 12 side. In the present embodiment, the connection pipe 46 may not rotate with respect to the case body 45.

  The held tube 94 is also called a rotating tube A or the like, and is connected to a fixed tube portion 98 fixed to the case body 45 so as to be rotatable around the axis with respect to the fixed tube portion 98. And a rotating tube portion 99. The held tube 94 has its front end (the front end of the fixed tube 98) fitted and held by the fitting portion 78 of the partition wall portion 59, and is exposed to the transfer chamber 52. A fixed tube portion 98 is held between the rear upper case 92 and the rear upper case 92. That is, the held tube 94 has an axial direction along the front-rear direction.

  The rotating tube 95 is also called a rotating tube B or the like, and has rotating shafts on both sides, respectively, and these rotating shafts are provided inside a held tube 94 (rotating tube portion 99) on the case body 45 side. It is connected so that it can rotate.

  Next, the operation of the embodiment will be described.

  At the time of cleaning, the base end of the extension tube 13 is connected to the cleaner body 12 (the connection portion 32 (the body connection port 38)), and the extension tube 13 is detachably locked and held by 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 unit 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 connection port 38, and the dust collection device 22). The connection pins 96 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 As a result, signals and power can be sent from the cleaner body 12 to the motor 55 and the control circuit unit 56.

  Then, in the vacuum cleaner 11, the user holding the holding unit 31 places the floor brush 14 on the surface to be cleaned. At this time, in a normal use state, the rotary pipe 95 rotates so that the rear side, which is the downstream side, is located upward and the upstream side is located downward. Then, the user operates the setting button 36 provided on the gripping part 31 to operate the electric blower 27 by the control means 28, and moves the floor brush 14 in the front-rear direction or the oblique direction on the surface to be cleaned. While alternately running, the dust on the surface to be cleaned is sucked using the negative pressure generated by driving the electric blower 27. That is, the negative pressure generated by the driving of the electric blower 27 is generated by the communication air passage, the dust collecting device 22, the dust collecting air passage, the main body connection port 38, the extension pipe 13, the floor brush 14 (the connection pipe 46, the transfer chamber 52, and the like). , And acts on the suction chamber 51 and the suction port 53) to suck dust along with air from the suction port 53 of the floor brush 14.

  In addition, the user can also rotate the rotary cleaning body 54 of the floor brush 14 according to the degree and type of soiling of 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 is transmitted together with power via the lead wire and the conductive wire via the extension tube 13 to the control circuit 56 of the floor brush 14. And the motor 55. Therefore, the control circuit unit 56 controls the driving of the motor 55 to rotate the motor 55, thereby rotating the rotary cleaning body 54 via the timing belt 69, and the cleaning member 68 of the rotating rotary cleaning body 54, Scrap dust etc. that has entered the floor.

  At the suction port 53, since the height of both ends in the left and right direction of the transfer chamber 52 communicating with the suction chamber 51 is lower than the center part communicating with the connection pipe 46, the pressure from the center in the left and right direction to both ends is reduced. The distribution is made uniform, and dust can be sucked from the entire suction port 53. Then, the dust-containing air sucked in from the suction port 53 is guided from the suction chamber 51 along the wind guide lower surface portion 72, and is squeezed into the communication opening 85 to flow in a state where the flow velocity is increased, thereby being smoothly transferred. The liquid is introduced into the chamber 52, and flows into the connection pipe 46 (the held pipe 94) via the transfer chamber 52. In the transfer chamber 52, the dust-containing air flows toward the connecting pipe 46, that is, along the inclined portions 89, 89 at both left and right ends of the transfer chamber ceiling surface portion 83, to the central curved portion 88, and to the curved portion 88. Along the way, it is sucked into the connection pipe 46. At this time, since the curved portion 88 is curved toward the upper end of the front end of the connection pipe 46 (the held pipe 94), the entire dust-containing air is smoothly guided into the connection pipe 46 and is sucked.

  Then, the dust-containing air flows to the extension pipe 13 via the connection pipe 46, and then is conveyed to the dust collecting device 22 via the extension pipe 13 to be separated from the air and collected. The air from which the dust is separated is sucked into the electric blower 27 to cool the electric blower 27, and then is exhausted to the outside of the cleaner body 12 from an exhaust port (not shown).

  As described above, according to the embodiment described above, the transfer chamber ceiling surface portion 83 of the transfer chamber 52 that communicates with the downstream side of the suction chamber 51 in which the rotary cleaning body 54 is rotatably arranged faces the connection pipe 46. By inclining downward (inclination portions 89, 89) from the position of the central portion in the left-right direction to the left-right direction separated from the connection pipe 46, a horizontally long suction port 53 opening to the suction chamber 51 is provided. Pressure distribution in the entire longitudinal direction, change the flow of dust-containing air at both ends to facilitate carrying dust to the connection pipe 46, and to suck dust-containing air (dust) evenly from the entire suction port 53. At the same time, the flow rate of the dust-containing air from the suction chamber 51 to the transfer chamber 52 is increased (by the communication opening 85), so that the dust can be more easily sucked. Therefore, the suction of dust from the suction port 53 can be improved while the dust on the surface to be cleaned can be cleaned (screwed out) using the rotary cleaning body 54, and the cleaning efficiency can be improved.

  Further, the transfer chamber ceiling surface portion 83 in the center in the left-right direction facing the connection pipe 46 of the transfer chamber 52 directly communicating with the connection pipe 46 is curved toward the upper edge of the connection pipe 46 (provided with a curved portion 88). Thus, the dead space in the transfer chamber 52 can be eliminated, the turbulence of the dust-containing air can be prevented, and the dust-containing air (dust) can be smoothly guided to the connection pipe 46.

  In particular, in the case of the vacuum cleaner 11 in which the battery 29 is used as a power source of the electric blower 27 or the like, the specific gravity is particularly large because it is not easy to increase the suction force of the electric blower 27 in consideration of the duration of cleaning and the like. A case where the power to suck up sand trash etc. is insufficient is considered. Therefore, the transfer chamber 52, which has a smaller volume than the suction chamber 51 and whose air flow is narrowed by the communication opening 85, is partitioned, and the transfer chamber 52 is provided with inclined portions 89, 89 on the transfer chamber ceiling surface 83 and connected to the curved portion 88. By bending toward the upper edge of the front end (upstream end) of the pipe 46, it is possible to increase the flow velocity of the air and change the flow to suck up dust without increasing the suction force of the electric blower 27 by electric power. it can. As a result, even in the electric vacuum cleaner 11 using the battery 29, even when the voltage of the battery 29 gradually decreases, dust can be reliably sucked in, and cleaning efficiency can be ensured.

  In the above embodiment, the vacuum cleaner 11 is, for example, a so-called canister type in which a floor brush 14 is connected via a hose body and an extension pipe 13 to a cleaner body 12 that can travel on a surface to be cleaned. May be. In this case, by providing the hand operation unit on the hose body, the configuration can be the same as in the above-described embodiment.

  In addition, although the battery 29 is used as a power source, the so-called rechargeable vacuum cleaner 11 is used, but a configuration in which a cord reel device or the like is used as a power source and power is supplied from an external power source such as a commercial AC power source may be used. In this case, by applying the configuration of the above-described embodiment, for example, in the case of an operation mode in which the suction force is suppressed, such as a weak operation, it is possible to reliably suck the dust as described above, Cleaning efficiency can be secured.

  While one embodiment of the present invention has been described, this embodiment is provided by way of example and is not intended to limit the scope of the invention. The new embodiment can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

11 Vacuum cleaner
12 Vacuum cleaner body
14 Floor brush as suction body
27 electric blower
29 batteries
45 case body
46 Connection tube
51 Suction chamber
52 Transfer room
53 Suction port
54 Rotary cleaning body
72 The lower surface of the air guide that constitutes the lower surface
83 The ceiling of the transfer room that constitutes the ceiling
85 communication opening

Claims (3)

A suction body of a vacuum cleaner including a case body elongated in the width direction and a connection pipe connected to a rear portion of the case body and communicating with a suction side of the electric blower,
A suction chamber partitioned along the width direction inside the case body and having a suction port opened at a lower portion facing the surface to be cleaned,
A rotary cleaning body having an axial direction along the width direction of the case body and rotatably provided in the suction chamber;
A transfer chamber having a communication opening positioned closer to the connection pipe than the suction port, and communicating with a downstream side of the suction chamber through the communication opening and partitioned along the width direction inside the case body; And
The transfer chamber has a lower surface continuous from the suction chamber, and a ceiling surface inclined downward in a width direction separated from the connection pipe from a position facing the connection pipe ,
The suction port body of a vacuum cleaner , wherein the lower surface is curved so that the suction chamber side is curved downward in an arc shape toward the suction chamber . A vacuum cleaner body containing an electric blower,
An electric vacuum cleaner comprising: the suction pipe according to claim 1, wherein the connection pipe communicates with a suction side of the electric blower. The electric vacuum cleaner according to claim 2, further comprising a battery provided on the main body of the vacuum cleaner and supplying electric power to the electric blower.

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