JP5250084B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner in which a wheel is provided in a suction port body.

  A conventional vacuum cleaner is disclosed in Patent Document 1. This vacuum cleaner is provided with a suction port body in which a suction port facing the floor surface is opened. The suction port body is connected to a grip part gripped by a user via an extension pipe, and the extension pipe is connected to a main body part provided with an electric blower and a dust collecting part via a hose. An air flow including dust on the floor surface flows into the main body from the suction port by driving the electric blower, and the air from which the dust has been removed by the dust collection is exhausted. Thereby, the floor surface is cleaned.

  The suction port is formed in a substantially rectangular shape that is long in the left-right direction with respect to the front-rear direction, and the bottom surface of the suction port body is formed in a substantially rectangular shape that is long in the left-right direction with respect to the front-rear direction. At this time, the extension pipe integral with the grip portion is connected to the central portion behind the suction port. Further, on the bottom surface of the suction port body, free wheels are provided at the left and right ends of the front part and the right and left ends of the rear part. The free wheel is pivotally supported on the suction port body by a first rotating shaft perpendicular to the floor surface and a second rotating shaft parallel to the floor surface, and rolls on the floor surface. Thereby, a suction inlet body can be easily moved to the front-back direction and the left-right direction on a floor surface.

Japanese Patent No. 29987878 (pages 2 to 3, FIG. 1)

  However, according to the conventional vacuum cleaner, the suction port body is provided with free wheels at both left and right ends, and moves while being pressed against the floor surface at the center in the left-right direction via an extension pipe integral with the gripping part. . For this reason, if the force transmitted from the grip portion to the suction port becomes uneven in the left-right direction, one of the free wheels in the left-right direction becomes difficult to rotate around the first rotation axis due to a decrease in frictional force with the floor surface. . Thereby, there existed a problem that the suction port body did not move smoothly but the operativity of a vacuum cleaner fell.

  An object of this invention is to provide the vacuum cleaner which can improve operativity.

  In order to achieve the above object, the present invention provides a gripping portion gripped by a user, and a connection that opens a suction port that is long in the left-right direction with respect to the front-rear direction facing the floor and is connected to the gripping portion. And a suction port body having a central portion in the left-right direction, wherein the suction port body is grounded at at least both ends of the front part. A grounding portion and a second grounding portion that is grounded at a central portion behind the suction port, the second grounding portion being pivotally supported by a first rotating shaft perpendicular to the floor surface, and a floor surface It is characterized by being formed by a free wheel having a wheel part that is supported on the support part and rolls on the floor surface by a second rotating shaft parallel to the support part.

  According to this configuration, the grip portion is gripped by the user, and the first ground portion and the second ground portion of the suction port body are grounded to the floor surface. When the gripping portion is moved in the front-rear direction and the left-right direction, the wheel portion of the second grounding portion rotates on the first rotation shaft and changes its direction and rotates on the floor surface by rotating on the second rotation shaft. As a result, the suction port body moves in the front-rear direction and the left-right direction, and dust on the floor is sucked from the suction port for cleaning.

  According to the present invention, in the vacuum cleaner having the above-described configuration, the suction port body is arranged in the suction port and is rotated rearward on the floor surface, the third grounding unit contacting the floor surface behind the second grounding unit. A rotating brush that slides, and when the first grounding part and the second grounding part are grounded, the third grounding part is separated from the floor surface, and when the second grounding part and the third grounding part are grounded, The rotating brush moves in a direction away from the floor surface.

  According to this configuration, when the suction port body moves forward, the first grounding portion and the second grounding portion are grounded, and the rotating brush slides on the floor surface. When the suction port is retracted, the second grounding portion and the third grounding portion are grounded, and the rotating brush is separated from the floor surface.

  According to the present invention, in the electric vacuum cleaner having the above-described configuration, the connecting portion is provided so as to be tiltable forward and backward, the wheel portion is disposed radially away from the first rotating shaft, and the wheel portion is the first. The center of rotation of the connecting portion is disposed between a position that is rotated around the rotation axis and disposed at the front end and a position that is disposed at the rear end.

  According to this configuration, the wheel portion is disposed at the rear end when the suction port is advanced, and the rotation center of the connecting portion is disposed between the wheel portion and the first grounding portion. Thereby, the first grounding portion and the second grounding portion can be easily grounded to the floor surface. When the suction port is retracted, the wheel portion is disposed at the front end, and the rotation center of the connecting portion is disposed between the wheel portion and the third grounding portion. Thereby, a 2nd grounding part and a 3rd grounding part can be easily grounded to a floor surface.

  Further, the present invention is characterized in that, in the vacuum cleaner having the above-described configuration, the rotation center of the connecting portion is arranged on the first rotation shaft or in front of the first rotation shaft. According to this configuration, when the suction port body is moved in the left-right direction, the rotation center of the connecting portion is disposed between the wheel portion and the first grounding portion. Thereby, the first grounding portion and the second grounding portion can be easily grounded to the floor surface.

  Moreover, the present invention is characterized in that, in the vacuum cleaner having the above configuration, the third grounding portion is formed by a roller having a larger axial width than the wheel portion. According to this configuration, the suction port body can be stably grounded when retreating.

  Further, the present invention is characterized in that, in the vacuum cleaner having the above-described configuration, the first grounding portion is made of a brushed cloth that is attached to the bottom surface of the suction port body and is arranged on the side of the suction port.

  According to the present invention, the connecting portion connected to the grip portion is disposed at the center portion in the left-right direction of the suction port body, and the first grounding portion that is grounded at both ends of the front portion of the suction port body, and the suction port And a second grounding portion that is grounded at a rear central portion, and the second grounding portion is formed by a free wheel having a first rotating shaft and a second rotating shaft. As a result, when the suction port body is moved, force is transmitted from the grip portion to the central portion of the suction port body via the connecting portion, and the free wheel disposed in the central portion is easily rotated around the first rotation axis. be able to. Therefore, the suction port body moves smoothly and the operability of the vacuum cleaner can be improved.

The perspective view which shows the vacuum cleaner of embodiment of this invention Side surface sectional drawing which shows the state at the time of advance of the suction inlet body of the vacuum cleaner of embodiment of this invention The disassembled perspective view which shows the suction inlet body of the vacuum cleaner of embodiment of this invention Side surface sectional drawing which shows the state at the time of reverse of the suction inlet body of the vacuum cleaner of embodiment of this invention

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a vacuum cleaner according to an embodiment. The vacuum cleaner 1 includes a main body 2 that includes an electric blower (not shown) and a dust collection portion (not shown) that collects dust upstream of the electric blower. A power cord 8 that can be pulled out and stored is provided on the back surface of the main body 2. The power cord 8 has a power plug 9 at its tip, and is supplied to the main unit 2 by being inserted into a commercial power outlet.

  A flexible hose 3 is connected to the front surface of the main body 2, and an extension pipe 4 is connected to the tip of the hose 3. A suction port body 10 having a suction port 12 (see FIG. 2) is provided at the tip of the extension pipe 4. In addition, a grip portion 6 and an operation portion 7 are provided at the tip of the hose 3. The user grips the grip portion 6 to move the suction port body 10, and the cleaning operation is executed by the operation of the operation portion 7.

  FIG. 2 is a side sectional view showing a state of the suction port body 10 when moving forward, and FIG. 3 is an exploded perspective view seen from the bottom surface of the suction port body 10. The suction port body 10 includes a casing 11 made of a resin molded product having an intake portion 11a having a suction port 12 and a protruding portion 11b protruding rearward from the intake portion 11a. The suction port 12 facing the floor surface F opens at the front part of the bottom surface of the intake part 11a. The suction port 12 is formed in a substantially rectangular shape that is long in the left-right direction with respect to the front-rear direction, and accordingly, the intake portion 11a is formed in a substantially rectangular shape that is long in the left-right direction with respect to the front-rear direction. Moreover, the protrusion part 11b protrudes back from the center part of the left-right direction of the intake part 11a. Thereby, the housing | casing 11 is formed in planar view substantially T shape.

  A bumper 15 that is in contact with the wall surface of the room is attached to the front end of the housing 11. The bumper 15 is made of a soft resin such as polyethylene. The front wall of the suction port 12 is formed by the bumper 15. Protrusions 16 are provided on the front surface of the bumper 15 at the left and right ends. The protrusion 16 is formed by sticking a resin having a low friction coefficient to the bumper 15. As the resin having a low friction coefficient, polyacetal resin (POM) such as Duracon (registered trademark), fluorine resin such as Teflon (registered trademark), or the like can be used.

  By disposing the protrusions 16 at the left and right end portions, the contact area between the suction port body 10 and the wall surface of the room can be reduced, and the slipperiness can be improved. In addition, the protrusion 16 can be formed of a resin having a low friction coefficient to further improve the slipperiness. Therefore, the suction inlet 10 can be easily moved in the left-right direction along the wall surface in the room.

  A rotating brush 14 is disposed inside the suction port 12. The rotary brush 14 slides on the floor surface F by rotating in the direction toward the rear on the floor surface F as indicated by an arrow A. Thereby, the rotating brush 14 scoops up dust on the floor surface F and guides it to the suction port 12.

  Brushed fabric 17 (first grounding portion) that is grounded to the floor surface F is attached to both sides of the suction port 12 of the housing 11. The raised cloth 17 can reduce the friction with the floor surface F and move the suction port body 10 easily. In addition, you may distribute the raising cloth 17 in front of the suction inlet 12. FIG. At this time, you may provide the raising cloth 17 in the strip | belt shape extended in the left-right direction. That is, the raised cloth 17 may be grounded at at least both ends of the front portion of the suction port 12. However, by arranging the raised cloth 17 on both sides of the suction port 12, the distance between the front end of the suction port body 10 and the suction port 12 can be reduced, and dust remaining along the wall surface of the room can be reduced. .

  A grounding detection wheel 19 is disposed at a rear portion of the intake portion 11 a of the housing 11. The ground detection wheel 19 is provided so as to be movable in the vertical direction, and the rotation shaft is arranged in the horizontal direction. The grounding detection wheel 19 rises when the suction port 10 is grounded to the floor surface F, and descends when the suction port body 10 leaves the floor surface F. Therefore, when the ground contact detection wheel 19 detects the ground contact of the suction port body 10 and the ground contact detection wheel 19 descends, the rotary brush 14 is stopped to improve safety.

  A free wheel 20 (second grounding portion) that rolls on the floor surface F is disposed on the bottom surface of the protruding portion 11 b of the housing 11. As a result, the universal wheel 20 is arranged in the central part behind the suction port 12. The universal wheel 20 has a support part 22, a bearing 23, and a wheel part 24. The support portion 22 has a fitting hole 22a that fits into the shaft 21 protruding on the bottom surface of the protruding portion 11b, and is attached with the bearing 23 sandwiched between the bearing surface of the shaft 21. The wheel portion 24 is pivotally supported by the support portion 22 by fitting the shaft portion 24 a into a shaft hole 22 b provided in the support portion 22.

  As a result, the universal wheel 20 rotates on the first rotation axis perpendicular to the floor surface F composed of the shaft 21 and rotates on the second rotation axis parallel to the floor surface F composed of the shaft portion 24a. Further, the wheel portion 24 is disposed away from the shaft 21 (first rotating shaft) in the radial direction. For this reason, the wheel portion 24 rotates around the shaft 21 with a predetermined rotation radius, and is disposed at the rear end when the suction port body 10 moves forward and is disposed at the front end when the suction port body 10 moves backward.

  The protrusion 11 b of the housing 11 is provided with a roller 18 (third grounding portion) that rolls on the floor surface F behind the free wheel 20. The roller 18 is pivotally supported on the housing 11 by a shaft portion 18 a parallel to the floor surface F. At this time, the roller 18 is disposed so as to be separated from the floor surface F when the raised cloth 17 and the wheel portion 24 arranged at the rear end are grounded to the floor surface F. Further, the roller 18 is disposed so that the rotating brush 14 is separated from the floor surface F when the roller 18 and the wheel portion 24 disposed at the front end are grounded to the floor surface F. In addition, the roller 18 is formed to have a larger width in the axial direction than the wheel portion 24, and the circumferential surface of the roller 18 is formed in a tapered shape that becomes thinner at both ends.

  The projecting portion 11b of the housing 11 is provided with a connecting portion 13 that is inserted and connected through the extension pipe 4 (see FIG. 1). Sliding portions 13c and 13d each having a cylindrical surface are formed on the upper and lower surfaces of the front portion of the connecting portion 13, respectively. Guide portions 11c and 11d having cylindrical surfaces that slide on the sliding portions 13c and 13d, respectively, are formed on the protruding portion 11b.

  As a result, the connecting portion 13 rotates about the center of the sliding portions 13c and 13d and the guide portions 11c and 11d as the rotation center 13a, and can be tilted in the front-rear direction. Therefore, the user holding the holding part 6 (see FIG. 1) can move the suction port body 10 by arranging the extension pipe 4 at a desired inclination angle with respect to the floor surface F.

  The rotation center 13 a of the connecting portion 13 is arranged on the first rotating shaft of the wheel portion 24 formed by the shaft 21 or in front of the first rotating shaft. Thereby, the rotation center 13a is disposed between a position where the wheel portion 24 is disposed at the front end when the suction port body 10 is retracted and a position where the wheel portion 24 is disposed at the rear end when the suction port body 10 is advanced.

  In the vacuum cleaner 1 having the above configuration, when the user grips and moves the grip portion 6, the suction port body 10 moves on the floor surface F via the extension pipe 4. Dust on the floor surface F is sucked from the suction port 12 and the floor surface F is cleaned. When the suction port body 10 moves forward, the suction port body 10 is tilted forward via the connecting portion 13 in order to move the grip 6 forward. For this reason, as shown in FIG. 2, as for the suction inlet body 10, the raising cloth 17 and the wheel part 24 are earth | grounded to the floor surface F, and the roller 18 leaves | separates from the floor surface F. FIG. And the raised cloth 17 slides on the floor surface F, and the wheel part 24 rolls.

  At this time, the wheel portion 24 is disposed at the rear end position, and the rotation center 13 a of the connecting portion 13 is disposed between the raised cloth 17 and the wheel portion 24. Thereby, since the force pressed against the floor surface F acts between the raising cloth 17 and the wheel part 24 via the connection part 13 to the suction inlet body 10, the suction inlet body 10 can be moved stably. . Further, since the rotating brush 14 rotates rearward on the floor surface F, it becomes a forward driving force and can smoothly advance the suction port 10.

  When the suction port body 10 is retracted, the suction port body 10 tilts backward via the connecting portion 13 in order to move the grip portion 6 backward. For this reason, as shown in FIG. 4, in the suction port body 10, the wheel portion 24 and the roller 18 are grounded to the floor surface F, and the raised cloth 17 and the rotating brush 14 are moved away from the floor surface F. Then, the wheel portion 24 and the roller 18 roll on the floor surface F. At this time, the wheel portion 24 is disposed at the front end position, and the rotation center 13 a of the connecting portion 13 is disposed between the wheel portion 24 and the roller 18.

  Thereby, since the force pressed on the floor surface F between the wheel part 24 and the roller 18 acts on the suction inlet body 10 via the connection part 13, the suction inlet body 10 can be moved stably. In addition, since the width of the roller 18 in the axial direction is larger than that of the wheel portion 24, the suction port body 10 can be further stabilized. Further, since the rotary brush 14 moves in a direction away from the floor surface F, it is possible to avoid a load of forward thrust and to smoothly retract the suction port body 10. Furthermore, wear of the raised fabric 17 due to sliding with the floor surface F can be reduced.

  When the suction port body 10 is moved in the left-right direction along the wall surface of the room, the wheel portion 24 rotates around the shaft 21 and is arranged at the left and right ends. The rotation center 13a of the connecting portion 13 is arranged on the first rotating shaft of the wheel portion 24 or in front of the first rotating shaft, and is arranged between the raised cloth 17 and the wheel portion 24 arranged on the left and right ends. . Thereby, since the force pressed against the floor surface F acts between the raising cloth 17 and the wheel part 24 via the connection part 13 to the suction inlet body 10, the suction inlet body 10 can be moved stably. .

  When the suction port body 10 is moved in the left-right direction while moving backward, the roller 18 slides on the floor surface F in the axial direction. At this time, since the circumferential surface of the roller 18 is formed in a tapered shape that becomes thinner at both ends, the friction between the floor surface F and the roller 18 can be reduced and the suction port body 10 can be easily moved.

  Note that force is transmitted from the gripping portion 6 to the suction port body 10 through the extension pipe 4 and the connecting portion 13 to the central portion in the left-right direction. For this reason, when changing the moving direction of the suction inlet body 10, the free wheel 20 distribute | arranged to the center part of the left-right direction easily rotates around the shaft 21, and the suction inlet body 10 can be moved smoothly.

  According to this embodiment, the connection part 13 connected with the holding part 6 is arranged in the center part of the left-right direction of the suction inlet body 10, and the raising cloth 17 (which grounds at the both ends of the front part of the suction inlet body 10 ( 1st grounding part) and the free wheel 20 (2nd grounding part) grounded in the center part of the back of the suction inlet 12. As a result, when the suction port body 10 is moved, the force is transmitted from the grip portion 6 to the center portion in the left-right direction of the suction port body 10 via the connecting portion 13, and the free wheel 20 disposed in the center portion in the left-right direction is moved. It can be easily rotated around the shaft 21 (first rotation axis). Therefore, the suction inlet body 10 moves smoothly and the operativity of the vacuum cleaner 1 can be improved.

  When the raised cloth 17 (first grounding part) and the wheel part 24 of the free wheel 20 (second grounding part) are grounded, the roller 18 (third grounding part) is separated from the floor surface F, and the wheel part 24 and the roller The rotary brush 14 moves away from the floor surface F when 18 is grounded. For this reason, when the suction port body 10 moves forward, it can be smoothly moved by the rotation of the rotary brush 14. Moreover, the load of the rotating brush 14 can be avoided when the suction port body 10 is retracted, and the suction port body 10 can be moved smoothly.

  Further, the wheel portion 24 is arranged radially away from the shaft 21 (first rotating shaft), and the rotation center 13a of the connecting portion 13 is disposed between the front end position and the rear end position of the wheel portion 24. Therefore, the rotation center 13 a is arranged between the raised cloth 17 and the wheel portion 24 when the suction port body 10 moves forward, and the rotation center 13 a is arranged between the wheel portion 24 and the roller 18 when moving backward. Therefore, the suction inlet 10 can be moved forward and backward stably.

  Further, since the rotation center 13a of the connecting portion 13 is arranged on the first rotation axis of the wheel portion 24 including the shaft 21 or in front of the first rotation axis, the rotation center when the suction port body 10 moves in the left-right direction. 13 a is arranged between the raised cloth 17 and the wheel portion 24. Accordingly, the suction port body 10 can be stably moved in the left-right direction.

  Moreover, since the width | variety of the axial direction of the roller 18 is larger than the wheel part 24, the suction inlet body 10 can be stabilized more at the time of reverse.

  Moreover, since the peripheral surface of the roller 18 is formed in a tapered shape that becomes narrow at both ends, the friction with the floor surface F is reduced when the suction port body 10 is moved in the left-right direction while retracting the suction port body 10. It can be moved easily.

  Moreover, since the raised cloth 17 which sticks to the bottom face of the suction inlet body 10 and is distribute | arranged to the side of the suction inlet 12 contacts the floor surface F, friction with the floor surface F is reduced and the suction inlet body 10 is made. It can be moved easily. In addition, the distance between the front end of the inlet 10 and the inlet 12 can be reduced to reduce dust remaining along the wall surface in the room.

  In the present embodiment, the universal wheels 20 that are grounded to the floor surface F may be arranged at a plurality of locations close to the central portion of the suction port body 10. Moreover, although the 1st earthing | grounding part which earth | grounds to the floor surface F is formed in the front part of the suction inlet body 10 with the raised cloth 17, the resin etc. which have a low friction coefficient with a high sliding property are stuck on the housing | casing 11. The first grounding portion may be formed. Moreover, you may earth | ground at the bottom face of the housing | casing 11 of a resin molded product, and you may form a 1st earthing | grounding part.

  According to this invention, it can utilize for the vacuum cleaner which provided the wheel in the suction inlet.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Main part 3 Hose 4 Extension pipe 6 Gripping part 7 Operation part 10 Suction port body 11 Housing | casing 12 Suction port 13 Outflow part 14 Rotary brush 15 Bumper 16 Protrusion part 17 Brushed cloth 18 Roller 18a Shaft part 19 Grounding detection Wheel 20 Universal wheel 21 Shaft 22 Support part 22a Fitting hole 22b Shaft hole 23 Bearing 24 Wheel part 24a Shaft part F Floor surface

Claims (5)

A suction port having a gripping portion gripped by the user and a suction port that opens in the left-right direction with respect to the front-rear direction facing the floor and has a connecting portion connected to the gripping portion in the center in the left-right direction A vacuum cleaner that includes a body and a rotating brush that is arranged in the suction port and that rotates and slides backward on the floor surface, and moves the suction port body by gripping the grip portion. A first grounding portion for grounding at at least both ends of the front portion, a second grounding portion for grounding at a central portion behind the suction port, and a third grounding portion for grounding to the floor behind the second grounding portion And a second grounding portion pivotally supported by a first rotating shaft perpendicular to the floor surface, and a second rotating shaft parallel to the floor surface and pivotally supported by the supporting portion on the floor surface. Rutotomoni formed by freely wheels and a wheel unit for rolling,
When the first grounding portion and the second grounding portion are grounded, the third grounding portion is separated from the floor surface, and when the second grounding portion and the third grounding portion are grounded, the rotating brush moves in a direction away from the floor surface. A vacuum cleaner characterized by that. The connecting portion is provided so as to be tiltable forward and backward, and the wheel portion is disposed radially away from the first rotating shaft, and the wheel portion is rotated around the first rotating shaft and arranged at the front end. vacuum cleaner according to claim 1, characterized in that it arranged a rotation center of the connecting portion between a position that is disposed at a position and a rear end that. The electric vacuum cleaner according to claim 2 , wherein a rotation center of the connecting portion is arranged on the first rotation shaft or in front of the first rotation shaft. The vacuum cleaner according to any one of claims 1 to 3 , wherein the third grounding portion is formed by a roller having a larger axial width than the wheel portion. Electric vacuum according to any one of claims 1 to 4, the first grounding portion is characterized in that it consists raised cloth which is arranged on the side of the suction port and attached to the bottom surface of the suction port body Machine.

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