JP2006239077A - Vacuum cleaner and its suction body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner having a floor brush suppressed in air passage loss. <P>SOLUTION: A case body 11 is provided with a connection pipe portion 12 communicating with a suction port and an air intake port 53, respectively, and communicating with the suction side of an electric fan. A turbine chamber 55 passing suction air therethrough from the air intake port 53 to the connection pipe portion 12 is provided with an air turbine 27a rotated by the passage of the suction air. The suction air passed through the air turbine 27a is substantially linearly conducted to the connection pipe portion 12 by an air-conducting wall portion 68, so that the suction air is sucked into the connection pipe portion 12 while the air passage loss is suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric vacuum cleaner including a rotary cleaning body driven by a drive unit having a fan rotated by intake air and a suction port body thereof.

Conventionally, this type of electric vacuum cleaner includes a vacuum cleaner body that houses an electric blower. The vacuum cleaner main body is formed with a main body suction port that communicates with the suction side of the electric blower, and a hose body, an extension pipe, and a floor brush provided with a hand operating portion are sequentially connected to the main body suction port. . The floor brush includes a horizontally long case body, and a suction pipe projectingly connected to the suction side of the electric blower via the extension pipe and the hose body projects from the rear portion of the case body. In addition, the case body has a suction port communicating with the suction pipe formed in the lower portion, and a rotating brush is rotatably provided. Further, an intake port communicating with the suction pipe is formed on one side of the upper portion on the rear side of the case body, and a turbine chamber containing an air turbine is defined between the intake port and the suction pipe. ing. The air turbine is rotated by the intake air flowing from the intake port to the intake pipe, thereby rotating the rotating brush (see, for example, Patent Document 1).
JP-A-9-248260 (page 3, FIG. 1)

  In the floor brush of the vacuum cleaner as described above, in order to improve the rotation efficiency of the rotating brush, it is preferable to maximize the air turbine among the limited case body sizes. An air turbine is disposed on the rear side of the central portion in the direction.

  On the other hand, in consideration of the balance of operability of the floor brush, the suction pipe is also protruded rearward from the central region in the width direction of the case body.

  For this reason, the wall portion of the turbine chamber formed in an arc shape along the outer periphery of the air turbine is curved so as to protrude to the side opposite to the intake port with respect to the tip opening of the suction portion. There is a problem in that the path of the intake air guided to the suction portion is curved between the exhaust position of the fan and the suction opening, resulting in air path loss.

  This invention is made | formed in view of such a point, and it aims at providing the vacuum cleaner which suppressed the air path loss, and its suction inlet.

  The present invention is provided in a case body provided with a suction port facing a surface to be cleaned and a suction port located above the suction port, and communicates with each of the suction port and the suction port and sucks in an electric blower. A communication pipe that communicates with the side, an air passage that is formed in the case body and through which the intake air passes from the intake port to the communication pipe, a fan that is provided in the air passage and is rotated by the passage of the intake air, and an air passage Provided on the outer periphery of the fan, part of which is formed in an arc shape along a part of the outer periphery of the fan, and a rotary cleaning body driven by the rotation of the fan. The fan is arranged so that the suction side is substantially linear.

  According to the present invention, the intake air sucked from the intake port and passed through the fan is guided substantially linearly to the communication pipe by the air guide wall portion, and the intake air is sucked into the communication pipe while suppressing the air path loss. be able to.

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  In FIG. 4, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 collects dust sucked together with intake air generated by driving the electric blower 2 accommodated in a dust collection pack (not shown) that can be attached and detached. Dust.

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

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

  As shown in FIGS. 1, 3 and 4, the floor brush 9 can be rotated in the circumferential direction and the vertical direction with respect to the case body 11 at the rear side of the case body 11 and the case body 11. The downstream side, which is the rear end portion pivotally supported by the motor, is provided with a connecting pipe portion 12 as a communication pipe connected to the suction side of the electric blower 2 through the extension pipe 8, the hose body 4 and the main body suction port 3. .

  As shown in FIGS. 1 to 3, the case body 11 includes a lower case 15 whose upper side is opened, an upper case 16 that closes the upper side of the lower case 15, and a case body 11 that is attached between the cases 15 and 16. A case 17 and a bumper 19 for buffering that is sandwiched between the cases 15 and 16 and continues from one side of the case body 11 through the front side to the other side are provided.

  Further, the case body 11 is formed with a rotary cleaning body chamber 22 on the front side in which a rotary brush 21 as a rotary cleaning body is rotatably accommodated in a lower portion facing the floor surface F as a surface to be cleaned by the lower case 15. In addition, on the right side shown in FIG. 1 which is one side in the width direction behind the rotary cleaning body chamber 22, a horizontally long suction port 24 for sucking dust on the floor surface F is provided at the lower end portion, and the connecting pipe portion A suction chamber 25 communicating with the connection pipe suction port 12a as a communication pipe suction port on the suction side of 12 is formed between the upper case 16 and the middle case 17, and behind the rotary cleaning body chamber 22, A drive chamber 28 that houses a drive unit 27 that rotationally drives the rotating brush 21 is formed in an airtight manner with respect to the suction chamber 25 by the cases 15, 16, and 17, and the left side of the rotary cleaning body chamber 22 shown in FIG. In addition, the side transmission chamber 29 into which one end of the rotating brush 21 is inserted is formed by the lower case 15 and the upper case 16. A section is formed.

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

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

  The lower case body 31 is integrally fixed to the upper case 16 and the middle case 17 by a plurality of screws (not shown). As shown in FIGS. 1 and 2, the lower case body 31 has a pair of driven wheel chambers 35 (only one of which is shown) on which a driven wheel 34 is rotatably supported. ing. Further, the lower case body 31 is provided with a horizontally long front wall portion 36 on the rear side of the driven wheel chamber 35, and an extending portion 37 is extended substantially horizontally rearward from the upper end of the front wall portion 36. Side walls 38 and 38 are continuously formed on both sides of the front wall portion 36 and the extension portion 37, and the front wall portion 36, the extension portion 37 and the rear ends of the side wall portions 38 and 38 are horizontally long. A rear wall portion 39 is formed substantially parallel to the front wall portion 36, and the rotary cleaning body chamber 22 is defined by the front wall portion 36, the extension portion 37, the side wall portions 38 and 38, and the rear wall portion 39. .

  In addition, a rear partition wall 40 extends toward the rear of the lower case body 31 behind the left end portion of the rear wall 39 shown in FIG. A side transmission chamber 29 is defined on the left side shown in FIG.

  Here, as shown in FIG. 3, the rotary brush 21 provided rotatably in the rotary cleaning body chamber 22 has a substantially elongated cylindrical brush assembly 43 as a shaft member and an outer peripheral surface of the brush assembly 43. A brush portion as a cleaning member attached in a spiral shape, or a plurality of cleaning portions 44 provided with a blade portion or the like, and both ends of the brush assembly 43 are pivotally supported via a cylindrical bearing 45, As shown in FIG. 2, the front end portion of the cleaning portion 44 protrudes downward from the lower surface of the lower case 15 and can come into contact with the floor surface F.

  As shown in FIG. 3, the bearing 45 is rotatably supported by the side wall portions 38 and 38. Further, each bearing 45 is inserted into the case body 11 at the tip side, and the right side bearing 45 shown in FIG. 3 as one end side is exposed to the outside by removing the closing plate 32 and the case body together with the rotating brush 21. It is removable from 11.

  Further, on the left side of the lower case body 31 shown in FIG. 3, a communication groove 47 is provided for communicating the rotary cleaning body chamber 22 with the left side portion of the case body 11 shown in FIG. 3.

  Further, a suction port 24 is formed in the rear side of the rear wall portion 39 of the lower case body 31, that is, the rear side of the rotary cleaning body chamber 22 so as to be biased toward the left side shown in FIG. The suction port 24 is provided adjacent to the rotary cleaning body chamber 22 so that dust picked up by the rotary brush 21 does not adhere to the floor surface F again.

  Then, the closing plate 32 is attached below the side transmission chamber 29, and is continuous in a longitudinal shape from the front end portion to the rear end portion on one side of the rotary cleaning body chamber 22 of the lower case body 31, The mounting member 48 can be attached to and detached from the lower case main body 31 by rotating.

  The protruding portion 33 protrudes from the rear portion of the center region in the width direction of the lower case body 31, and wheels 51 and 51 are rotatably supported on both side portions of the protruding portion 33.

  On the other hand, as shown in FIGS. 1 and 2, the upper case 16 is formed in a horizontally long rectangular plate shape corresponding to the shape of the lower case 15. The upper case 16 has a rear portion in the center region in the width direction that protrudes above the base end portion of the projecting portion 33 of the lower case 15, and rotates the connecting tube portion 12 in the circumferential direction between the projecting portion 33 and the upper case 16. Hold it possible.

  Further, on the right side of the upper rear portion of the upper case 16 shown in FIG. 1, an air inlet 53 formed by a plurality of small-diameter round holes communicating with the drive chamber 28 is formed.

  Further, as shown in FIGS. 1 and 2, the middle case 17 has a turbine chamber 55 as an air passage that communicates with all of the intake ports 53 and accommodates the air turbine 27 a between the upper case 16 and the case body 11. In addition to being partitioned on the side of the suction port 53 in the width direction, a transmission chamber 56 that houses the transmission part 27b between the lower case 15 and the suction port 53 in the width direction of the case body 11 is partitioned.

  The middle case 17 includes a plate-like air guide portion 61 that is continuous from the air inlet 53 side, and a funnel-like funnel portion 62 that is continuous with the air guide portion 61 and has a lower diameter formed smaller than the upper side. In addition, a turbine chamber 55 is provided between the air guide 61 and the funnel 62 and the upper case 16, and a transmission chamber 56 is provided between the air guide 61 and the funnel 62 and the lower case 15.

  The air guide part 61 is a part that introduces the intake air sucked from the air inlet 53 into the funnel part 62 while rectifying and increasing the speed, and the front wall part 64 is inclined along the tangential direction of the funnel part 62. It is formed and narrow toward the funnel portion 62.

  Further, the funnel portion 62 is formed in a funnel shape in which the side plate 65 continuing to the air guide portion 61 is inclined and continues to the bottom plate 66 and the lower side has a small diameter, and on the front side of the side plate 65, the extended portion of the lower case 15 A stepped portion 65a located at the upper portion of the portion extending from 37 to the rear wall portion 39 is provided, and a cylindrical boss portion 67 that rotatably supports the air turbine 27a is provided upward at the center of the bottom plate 66. Projected.

  Further, on the outer periphery of the funnel portion 62, there is a wind guide wall portion 68 that is partly formed in an arc shape along a part of the outer periphery so as to be spaced from the outer periphery of the air turbine 27a at substantially equal intervals. It continues to the rear side of the part 64 and the side plate 65. This air guide wall portion 68 guides the intake air that has passed through the air turbine 27a to the connection pipe suction port 12a of the connection pipe portion 12 in a substantially straight line, and the intake air is formed on the rear side of the side plate 65. Exhaust is performed from the turbine chamber exhaust port 69 serving as a wind exhaust port to the connection pipe portion 12.

  Further, the turbine chamber exhaust port 69 is provided continuously at the rear end of the air guide wall portion 68 so that the opening direction substantially coincides with the central axis of the connection tube suction port 12a of the connection tube portion 12, and the connection tube suction port Opposite 12a.

  As shown in FIG. 2, the air turbine 27a accommodated in the turbine chamber 55 includes a flat turbine body 71 having a circular shape in plan view, and a rotating shaft 72 provided integrally with the turbine body 71. have.

  As shown in FIG. 2, the turbine main body 71 includes a disk-shaped top plate 74 and a plurality of turbine blades 75 projecting from the bottom of the top plate 74. The turbine blades 75 receive the intake air and rotate the air turbine 27a. The turbine blades 75 are formed in an arc shape curved in the circumferential direction from the central axis side of the turbine body 71 toward the outer peripheral edge of the top plate 74. The main body 71 is spaced from the circumferential direction at substantially equal intervals.

  The rotating shaft 72 is inserted into the boss portion 67 and is press-fitted into a bearing 77 provided at the lower end portion of the boss portion 67 so that the tip protrudes downward. A gear 78 is fitted to the protruding lower end portion. Has been.

  As shown in FIG. 1, the air turbine 27a is disposed closer to the intake port 53 in a plan view with respect to the central axis of the connecting pipe portion 12 that is the center in the width direction of the case body 11 of the floor brush 9, The front part located on the intake port 53 side from the center line of the turbine body 71 in the width direction, that is, the line along the front-rear direction of the case body 11 through the center of the rotating shaft 72 is the intake side that receives the intake air, A rear portion located on the opposite side of the intake port 53 from the center line is an exhaust side of the passing intake air.

  Further, the air turbine 27a is configured such that the tangent line in the plan view on the exhaust side of the turbine body 71 along the front-rear direction of the case body 11 and the center line in the width direction of the turbine body 71 are connected to the connection pipe suction port 12a of the connection pipe portion 12, respectively. It is located within the width of. In other words, the entire exhaust side of the air turbine 27 a is located within the width of the connection pipe suction port 12 a of the connection pipe part 12 and faces the front surface of the connection pipe part 12. That is, the exhaust side of the air turbine 27a is located closer to the intake port 53 side than the inner edge side portion opposite to the intake port 53 with respect to the central axis of the connection pipe portion 12.

  Therefore, as shown in FIG. 1, the air guide wall portion 68 and the connection pipe suction port 12 a of the connection pipe portion 12 are formed to be substantially straight, and the air guide wall portion 68 is formed at the tip of the connection pipe portion 12. 1 is substantially collinear along the front-rear direction of the case body 11 and the inner edge of the left side shown in FIG. 1, and as shown in FIG. The entire opening edge is included inside the opening edge of the connecting pipe suction port 12a.

  Further, the transmission chamber 56 is partitioned and formed on the left side of the case body 11 shown in FIG. 1, that is, on the side of the suction chamber 25, and is located at the rear of the rotary cleaning body chamber 22 and the side of the side transmission chamber 29. .

  The transmission portion 27b accommodated in the transmission chamber 56 is a so-called gear box, and a gear (not shown) protrudes from the lower portion between the gear 78 provided on the rotating shaft 72 of the air turbine 27a. A belt 81 is wound around the belt. Further, in this transmission portion 27b, a transmission pulley 82 connected to a bevel gear (not shown) that changes the rotation direction of the gear is protruded from the side and inserted into the side transmission chamber 29. The transmission belt 83 is wound around the bearing 45.

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

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

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

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

  At this time, dust on the floor surface F is sucked together with air from the suction port 24 below the floor brush 9, and intake air is sucked from the suction port 53 above the floor brush 9.

  Here, the intake air sucked from the intake port 53 flows into the funnel portion 62 while being rectified and accelerated by the air guide portion 61, hits the turbine blade 75, and rotates the air turbine 27a.

  The rotation of the rotating shaft 72 rotated by the rotation of the air turbine 27a is transmitted to the transmission unit 27b via the gear 78 and the belt 81, and the rotation direction is converted in the transmission unit 27b and output from the transmission pulley 82. Then, the output of the transmission pulley 82 is transmitted from the bearing 45 to the rotating brush 21 via the transmitting belt 83, and the rotating brush 21 rotates in a predetermined direction.

  Then, by the rotation of the rotating brush 21, the tip of the cleaning unit 44 comes into contact with the floor surface F to scrape up dust on the floor surface F, and the dust thus sucked up is sucked into the suction port 24 together with air. It is.

  On the other hand, the intake air that rotates the air turbine 27a is guided along the axial direction of the connecting pipe portion 12 from the turbine chamber exhaust port 69 while being guided by the air guide wall portion 68, and is connected through the turbine chamber exhaust port 69. It is sucked linearly into the connecting pipe suction port 12a of the pipe part 12.

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

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

  As described above, in the above embodiment, the intake air that has been sucked from the intake port 53 and passed through the air turbine 27a is moved along the axial direction of the connection tube portion 12 by the air guide wall portion 68 of the turbine chamber 55. The intake air is sucked into the connecting pipe portion 12 in a substantially straight line by being guided in a substantially straight shape to the portion 12.

  For this reason, for example, as in the conventional case where the air turbine is disposed in the approximate center of the width direction of the floor brush, the exhaust side position of the air turbine is displaced with respect to the connecting pipe portion, and the connection of the intake air that has passed through the air turbine Compared with the configuration in which the air path to the pipe part is curved in an arc shape, the intake air can be sucked into the connecting pipe part 12 with the air path being lost.

  Further, by making the opening direction of the turbine chamber exhaust port 69 for exhausting the intake air that has passed through the air turbine 27a to the connection pipe part 12 substantially coincide with the central axis of the connection pipe suction port 12a of the connection pipe part 12, the air turbine The intake air that has passed through 27a can be reliably sucked into the connecting pipe section 12, and the air path loss can be further suppressed.

  In addition, by forming the turbine chamber exhaust port 69 so that the entire opening edge of the turbine chamber exhaust port 69 is included in the opening edge of the connection pipe suction port 12a, intake air is sent from the turbine chamber exhaust port 69 to the connection pipe portion 12. And you can suck more reliably.

  Furthermore, by arranging the air turbine 27a closer to the intake port 53 side with respect to the central axis of the connecting pipe portion 12, the size of the air turbine 27a is secured to the maximum within a certain size of the case body 11. On the other hand, the exhaust side of the air turbine 27a can be disposed in front of the connection pipe portion 12, and the rotational torque of the air turbine 27a can be ensured to ensure the rotational driving force of the rotary brush 21.

  Then, in the width direction of the case body 11 of the floor brush 9, the air turbine 27a is disposed on the opposite side of the transmission portion 27b including gears, so that the weight balance of the floor brush 9 can be easily achieved. The floor brush 9 can be prevented from being inclined when the 9 is lifted from the floor surface F, and the operability of the floor brush 9 can be improved.

  Moreover, suction efficiency, ie, a dust absorption performance, can be ensured by using the floor brush 9 which suppressed the air path loss for the vacuum cleaner.

  In the above embodiment, if the air turbine 27a is located closer to the intake port 53 side than the inner edge side opposite to the intake port 53 with respect to the central axis of the connection pipe portion 12, It can be provided at any position. In other words, if the position on the exhaust side of the air turbine 27a is closer to the intake port 53 side than the inner edge on the opposite side of the intake port 53 with respect to the central axis of the connection pipe portion 12, the air guide wall 68 is appropriately designed. Thus, the intake air that has passed through the air turbine 27a can be linearly guided to the connecting pipe portion 12.

  Further, the intake port 53 can be provided at any position as long as it is located above the intake port 24 and other than the front side of the case body 11.

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

It is a top view which shows the suction inlet body of the vacuum cleaner of one embodiment of this invention. It is a longitudinal cross-sectional view which shows a suction inlet same as the above. It is a bottom view which shows a suction inlet same as the above. It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above.

Explanation of symbols

1 Vacuum Cleaner Body 2 Electric Blower 9 Floor Brush as Suction Port
11 Case body
12 Connection pipe section as a communication pipe
21 Rotating brush as rotating cleaning body
24 Suction port
27a Air turbine as a fan
53 Air intake
55 Turbine room as air channel
68 Wind guide wall
69 Turbine room exhaust port as intake air exhaust port F Floor surface to be cleaned

Claims (3)

A case body having a suction port facing the surface to be cleaned, and a suction port positioned above the suction port;
A communication pipe provided in the case body, communicating with each of the suction port and the suction port and communicating with the suction side of the electric blower,
An air passage formed in the case body and through which the intake air passes from the intake port to the communication pipe;
A fan provided in the air passage and rotated by passage of the intake air;
An air guide wall portion provided in the air path, and a part of which is formed in an arc shape along a part of the outer periphery of the fan;
A rotating cleaning body provided on the case body and driven by rotation of the fan;
The fan is arranged such that the air guide wall portion and the suction side of the communication pipe are substantially straight. Provided in the air passage continuously to the wind guide wall so that the opening direction substantially coincides with the central axis of the communication pipe, and has an intake air exhaust port for exhausting the intake air sucked from the intake port to the communication pipe The suction inlet body of the vacuum cleaner of Claim 1 characterized by the above-mentioned. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising: a suction port body according to claim 1 or 2, wherein a communication pipe is connected to the suction side of the electric blower.

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