JP2014018256A - Suction tool for electric vacuum cleaner, and electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool capable of preventing a tatami or a soft floor surface (e.g., a hinoki floor) or the like from being scratched when the suction tool is subjected to a slide slip in a direction perpendicular to a forward direction at time of cleaning the suction tool.SOLUTION: An electric vacuum cleaner is constituted to comprise: a suction tool 10 communicating with a cleaner body 1 for establishing a suction force; a rotary cleaning member 30 arranged in a housing portion 40 opened in an under-surface of the suction tool 10; a bearing holding member 50 arranged at an axially end portion of the rotary cleaning member 30 for holding the rotary cleaner member 30 removably; wheels 55 disposed on a lower face of the bearing holding member 50; and floor-surface contact members 55c constituting the wheels 55 having C-cut faces on at least one end portion.

Description

The present invention relates to a vacuum cleaner suction tool and a vacuum cleaner using the suction tool.

  Conventionally, a general electric vacuum cleaner has a vacuum cleaner body, a hose portion connected to the vacuum cleaner body, an operation tube connected to an end portion of the hose portion, and an extension connected to an end portion of the operation tube. It comprises a pipe and a suction tool that is detachably attached to the end of the extension pipe.

  As a suction tool, one that incorporates a power brush is known. The power brush includes a rotary cleaning body capable of scraping dust on a cleaning surface, and an electric motor (drive) for driving the rotary cleaning body. Part).

  Further, the lower surface of the suction tool has a brush composed of a cut pile-shaped spun cloth, and a wheel disposed in the vicinity of the brush. It has been proposed that the wheel includes an axle having a shaft hole, and a contact member disposed on an outer periphery of the axle and contacting a floor surface, and the contact member is made of a material in which a nonwoven fabric is impregnated with a synthetic resin. Yes. (For example, refer to Patent Document 1).

JP 2000-343903 A

  By the way, in patent document 1, in the above-mentioned conventional vacuum cleaner suction tool and vacuum cleaner, it is proposed that the contact member is made of a material in which a nonwoven fabric is impregnated with a synthetic resin. The end of the member has an edge shape, and there is a concern that tatami mats and soft floor surfaces (such as cypresses) may be damaged when sliding sideways in a direction perpendicular to the advancing direction when cleaning the suction tool. The

  The present invention provides a suction tool that can prevent tatami mats and soft floor surfaces (such as cypress) from being damaged when they are slid in a direction perpendicular to the advancing direction during cleaning of the suction tool. For the purpose.

  In order to solve the above problems, a vacuum cleaner suction tool according to the present invention includes a suction tool communicating with a vacuum cleaner main body that generates a suction force, and a rotation disposed in a receiving portion that opens on a lower surface of the suction tool. It has a cleaning body and a wheel provided in the suction tool, and has a contact member disposed on the outer periphery of the wheel and in contact with the floor surface, and the contact member is a material in which a nonwoven fabric is impregnated with a synthetic resin. And at least one end of the contact member has a C-cut surface.

  According to the present invention, it is possible to prevent damage to a tatami mat, a soft floor surface (such as cypress), and the like when the skid is slid in a direction perpendicular to the advancing direction of the suction tool.

It is an appearance perspective view showing the whole vacuum cleaner concerning one embodiment of the present invention. (A) is a top view of a suction tool, (b) is a bottom view of a suction tool. (A) is the perspective view which looked at the bearing pressing member from back diagonally downward, (b) is the perspective view which looked from the front diagonally upward, and (c) is the perspective sectional view. It is a bottom view which shows the state which removed the bearing pressing member in the drive side. It is a side view of a suction tool. It is an expanded side view which made the edge part of the suction tool the cross section. It is a perspective view which shows the modification of a bearing pressing member. It is a perspective view which shows the modification of a bearing pressing member. It is sectional drawing of the wheel 55 of C surface unprocessed. It is wheel 55 sectional drawing of C surface processing. It is a figure which shows the use condition of a suction tool, and is a top view.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. However, the embodiments are not limited to the following contents, and can be arbitrarily modified within the scope of the invention. It is.

  In the following, in the first suction tool 10, the side on which the rotary cleaning body 30 (see FIG. 2 (b)) is disposed (advance direction during cleaning) is the front side, and the suction joint 15 is provided opposite to this. The rear side (reverse direction during cleaning) will be described as the rear side.

  As shown in FIG. 1, the vacuum cleaner 1 includes a vacuum cleaner body 2, a hose portion 3, an operation tube 4 provided with a hand operation switch SW and the like, an extension tube 5 provided in a telescopic manner, The second suction tool 6 and the first suction tool 10 are provided.

  As shown in FIG. 2B, the first suction tool (hereinafter simply referred to as “suction tool”) 10 includes a rotary cleaning body 30 that constitutes a power brush, and a bearing pressing member that holds the rotary cleaning body 30. 50, 50.

  As shown in FIG. 1, the outer shell of the cleaner body 2 is covered with an upper case 2a and a lower case 2b. The upper case 2a is positioned above the approximate center in the vertical direction, and the lower case 2b is positioned below the approximate center in the vertical direction. The vacuum cleaner body 2 includes an electric blower 2c that generates a suction force, a dust collection unit (not shown) that stores dust collected by the suction force of the electric blower 2c, and the like. Then, by operating the hand operation switch SW of the operation tube 4 or the like, the operation of the electric blower 2c is switched, the power brush (rotary cleaning body 30 or the like, see FIG. 2) provided in the suction tool 10 is turned on and off, and the like. Is possible. The dust collection part is accommodated on the front side of the cleaner body 2 (the side on which the connection port 2d is formed). A lid that can be opened and closed is formed on the front side of the upper case 2a, and the lid covers the dust collecting portion so that it can be opened and closed.

  The operation tube 4 is formed in a cylindrical shape at a portion connected to the hose portion 3 from the front side connected to the extension tube 5, and is further formed with a grip 4 a branched from the cylindrical portion and extending backward. . The hand operation switch SW is formed on the grip 4a. In the grip 4a, an electrical component for the hand operation switch SW is provided.

  In addition, when saying a direction in the whole vacuum cleaner 1, the side close | similar to the vacuum cleaner main body 2 is made into the back side (rear end) along the ventilation path (not shown) from the suction tool 10 to the vacuum cleaner main body 2, The opposite side will be described as the front end side (front end).

  The rear end of the hose part 3 is connected to the connection port 2d of the cleaner body 2 so as to communicate with the dust collecting part of the cleaner body 2. Further, the front end of the hose portion 3 is connected to the cylindrical portion of the operation tube 4. In addition to the above-described hand operation switch SW, the operation tube 4 is provided with a power supply terminal (not shown) to which power is supplied from the cleaner body 2 at an opening (not shown) to which the extension tube 5 is connected. An energization terminal (not shown) provided at the rear end of the extension pipe 5 is connected to the power supply terminal.

  The extension pipe 5 includes an outer pipe 5a and an inner pipe 5b, and a ventilation path (not shown) provided inside the outer pipe 5a and the inner pipe 5b with the rear end of the inner pipe 5b inserted into the front end of the outer pipe 5a. Are connected so as to communicate with each other, and are configured to be stretchable.

  As shown in FIG. 1, the second suction tool 6 is a suction tool detachably connected to the front end of the inner pipe 5 b of the extension pipe 5. The suction tool 10 is detachably connected to the front end of the second suction tool 6. The 2nd suction tool 6 can function as a suction tool which sucks dust independently by removing suction tool 10 from the front end. Note that the second suction tool 6 may be detachably connected between the outer tube 5 a of the extension tube 5 and the operation tube 4. However, the 2nd suction tool 6 is not an essential structure.

  The suction tool 10 is a suction tool connected to the front end of the second suction tool 6, and a suction chamber having an opening on the lower surface (the surface facing the cleaning surface) as shown in FIG. (Accommodating portion) 40 is formed. In the suction chamber 40, a rotary cleaning body 30 constituting a power brush is rotatably incorporated. The power brush is configured to include a rotary cleaning body 30 and an electric motor 35 as a drive unit for driving the rotary cleaning body 30 so that dust such as a floor surface to be a cleaning surface is scraped by the rotary cleaning body 30. Works.

  The suction tool 10 can also be used by connecting to the front end of the inner tube 5b (see FIG. 1) of the extension tube 5 or the front end of the operation tube 4 (see FIG. 1).

  In the vacuum cleaner 1 of the present embodiment, power to be supplied to the electric motor 35 of the suction tool 10 is supplied from the cleaner body 2 through the hose portion 3, the operation tube 4, the extension tube 5, and the second suction tool 6. It is configured to do.

  As shown in FIG. 2B, the suction tool 10 includes a lower case 11 that forms a lower portion so as to cover the rotary cleaning body 30, and an upper case 12 that is attached to the upper portion of the lower case 11 (FIG. a) a suction body 13 provided with a reference) and a suction joint 15 attached to a rear portion of the suction body 13 and having an air passage 14 formed therein. The main parts of the lower case 11, the upper case 12, and the suction joint 15 are formed of a light and hard material, for example, a synthetic resin material such as ABS resin, and the rigidity is enhanced.

  As shown in FIGS. 2 (a) and 2 (b), the suction joint 15 is provided at the center in the left-right (width) direction on the rear side of the suction tool 10. The suction joint 15 is rotatably connected to the suction body 13 with one end (not shown) sandwiched between the lower case 11 and the upper case 12. The suction joint 15 includes a first connection pipe 15a that can rotate from a substantially horizontal state to a substantially vertical state (vertical direction) with respect to the cleaning surface, and one end of the first connection pipe 15a. And a second connection pipe 15b that is turnable in the left-right direction with respect to the mouthpiece body 13. The other end of the second connection pipe 15b is connected to the inner pipe 5b (see FIG. 1) of the extension pipe 5 and the second suction tool 6 (see FIG. 1). As shown in FIG. 2A, a connection terminal 15c for supplying electric power to the electric motor 35 is provided on the upper portion of the connection pipe 15b.

  Such a mouthpiece joint 15 can, for example, tilt the extension pipe 5 toward the left-right direction of the mouthpiece body 13 in a state in which the extension pipe 5 (see FIG. 1, hereinafter the same) is substantially perpendicular to the cleaning surface. It has a function that can. Thus, by twisting the operation tube 4 in either the left or right direction, the suction body 13 can be rotated approximately 90 degrees in the left or right direction, and cleaning can be performed with the left and right direction of the suction body 13 in the moving direction. Therefore, it is possible to clean by moving the suction tool 10 along the wall or inserting the suction tool 10 into a narrow gap.

  The vacuum cleaner 1 includes a vacuum cleaner body 2 having means for sucking dust together with an air flow, a suction tool 10 having a suction mouth for sucking dust, and dust sucked from the suction mouth of the suction tool 10. A connecting pipe that forms a ventilation path for guiding the cleaner body 2 and moving the suction tool 10 to guide the dust sucked from the suction port to the cleaner body 2 through the connecting pipe. The suction tool 10 has a suction body 13 having a length in the left-right direction that is longer than a length in the depth direction, and connects the suction body 13 to the connecting pipe and includes the suction body 10 in the suction pipe 10. A free connecting part that forms a ventilation path for guiding dust, and each of the free connecting parts is made of a resin molded product, and has a tubular and substantially linear shape with a ventilation path formed on its inner surface. Arms and upper arms One end of the lower arm part and one end of the upper arm part, the upper and lower surfaces of one end of the lower arm part being fitted into the other end, and perpendicular to the upper and lower surfaces and perpendicular to the central axis of the tubular upper arm part It is connected rotatably by a first rotation shaft having a central axis so that the tube axis of the lower arm portion and the tube axis of the upper arm portion can be in a straight line, The other end is rotatably connected to the suction body 13 by a second rotating shaft having an axial center in the same direction as the left-right direction of the suction body 13, and the other end of the upper arm is connected to the connection pipe, The second rotation shaft enables the connection tube to rotate in a height direction with respect to the cleaning surface, and the first rotation shaft causes the connection tube to be orthogonal to the rotation direction of the second rotation shaft. Direction of rotation and having a tube axis perpendicular to the central axis of the first rotation axis By rotating the connecting pipe around its tube axis, the state in which the depth direction of the mouthpiece main body 13 is the front-rear direction of cleaning is changed to the state in which the left-right direction of the mouthpiece main body 13 is the front-back direction of the cleaning. And is configured to be changeable. Moreover, in order to achieve the said objective, the suction tool 10 of the vacuum cleaner 1 by a present Example is equipped with the suction mouth for sucking dust in a lower surface, and the suction mouth main body 13 whose length in the left-right direction is longer than the length in the depth direction. And a universal connecting portion for connecting the suction mouth body 13 to a connection pipe that forms a ventilation path for guiding dust sucked from the suction mouth of the suction mouth body 13 to the cleaner body 2, and Each part is made of a resin molded product, and includes a tubular and generally linear lower arm part and upper arm part each having a ventilation path formed on its inner surface, and one end of the lower arm part and one end of the upper arm part The upper and lower surfaces of one end are fitted into the other end, and are rotatably connected by a first rotating shaft having a central axis perpendicular to the upper and lower surfaces and perpendicular to the central axis of the tubular upper arm. And the tube axis of the lower arm The tube axis of the upper arm portion can be in a straight line, and the other end of the lower arm portion is formed by a second rotating shaft having an axis in the same direction as the left-right direction of the mouthpiece body 13. The other end of the upper arm is connected to the connection pipe, and the second rotation shaft rotates the pipe shaft of the upper arm in the height direction with respect to the cleaning surface. The first rotating shaft can rotate the tube axis of the upper arm in a direction orthogonal to the rotating direction of the second rotating shaft, and is orthogonal to the central axis of the first rotating shaft. By rotating the upper arm portion having the tube axis to be rotated around the tube axis, the left-right direction of the mouthpiece body 13 is changed from the state in which the depth direction of the mouthpiece body 13 is the front-rear direction of cleaning. It is configured to be able to change to a state of direction. With the above configuration, the connection pipe connected to the suction tool 10 is rotated around its pipe axis, so that the posture (orientation) of the suction tool 10 when moving back and forth for cleaning is determined in the horizontal direction and the depth direction. Therefore, it is possible to provide the electric cleaning device 1 and the suction tool 10 thereof that can be easily and easily changed, and that can improve the operability and the cleaning property. Furthermore, since the height of the whole suction tool 10 can be made as small as possible, the bottom of the bed and the like can be cleaned to the back.

  Moreover, as shown to Fig.2 (a), the bumper 16 is interposed by the inlet main body 13 between the lower case 11 and the upper case 12 from the front part to the left-right side (refer FIG. 5). . The bumper 16 is made of an elastic material such as rubber or elastomer. The bumper 16 keeps the airtightness in the mouthpiece body 13 when used, and the mouthpiece body 13 is furniture when the electric vacuum cleaner 1 (see FIG. 1, the same applies hereinafter) is used. When it collides with, etc., it acts as a cushioning material that absorbs damage to the furniture and the like and shocks to the mouthpiece body 13.

  Further, as shown in FIG. 2B, a brush drive switch 11a is provided at the center of the lower surface of the mouthpiece body 13 (the lower surface of the lower case 11). This brush drive switch 11a is a switch that detects whether or not the lower surface of the suction tool 10 is in contact with the cleaning surface. The brush drive switch 11a includes a roller 11a1, and the roller 11a1 is provided so as to always protrude from the lower surface of the lower case 11 by a biasing means such as a spring. When it is detected that the roller 11a1 has popped out and is not in contact with the cleaning surface, the electric motor 35 is stopped by a circuit board (not shown) provided in the suction tool 10. Further, when it is detected that the roller 11a1 is pushed into contact with the cleaning surface, the electric motor 35 is driven by the circuit board.

  In the present embodiment, the roller 11a1 is disposed on the center line O1 in the front-rear direction of the suction tool 10.

A wheel 11b is provided at the rear end of the mouthpiece body 13 that is behind the roller 11a1.
This wheel 11b receives the stress of the forward / backward movement and rotation operation which are operated with the operation tube 4, and makes the bottom face of the suction tool 10 closely_contact | adhere to a cleaning surface, and makes the role which improves the operation performance of the suction tool 10 by this.

  In front of the brush drive switch 11a, a fixed brush 17 extending along the axial direction (left-right direction, width direction) of the rotary cleaning body 30 is provided on the lower surface of the suction body 13. The fixed brush 17 plays a role of contacting the cleaning surface and maintaining airtightness with the cleaning surface.

  As shown in FIG. 2B, the suction chamber 40 is open on the lower surface of the lower case 11, has a substantially curved concave shape in cross section, and rotatably accommodates the rotary cleaning body 30. A suction port 41 is formed behind the suction chamber 40. The suction port 41 communicates with the passage 14 of the suction joint 15.

  A storage chamber in which the electric motor 35 is stored is formed behind the suction chamber 40 with a partition wall (not shown) of the suction chamber 40 therebetween. The accommodation chamber is formed by being surrounded by the lower case 11 and the upper case 12, and is arranged in parallel with the suction chamber 40.

  As shown in FIG. 2B, the rotary cleaning body 30 includes a cylindrical core (not shown) provided with a plurality of brush-like rubbing members 31 made of fibers or the like. The rubbing member 31 is provided in a spiral shape along the axial direction of the rotary cleaning body 30, and acts to scrape out dust on the cleaning surface by its rotational driving force by allowing contact with the cleaning surface. For example, when the cleaning surface is flooring or the like, the frictional resistance against the rotary cleaning body 30 is small, so the load applied to the electric motor 35 is small. However, when the cleaning surface is a carpet or the like, the frictional resistance against the rotary cleaning body 30 is large. The load applied to the electric motor 35 is increased. Therefore, the electric motor 35 has enough torque to rotate the rotary cleaning body 30 even when the rotary cleaning body 30 comes into contact with a carpet or the like.

  A suction port (not shown) that opens depending on the magnitude of the negative pressure in the suction chamber 40 is formed on the upper side of the rotary cleaning body 30, and dust floating in the upper space of the upper case 12 is sucked into the suction chamber through the suction port. You may comprise so that it may take in in 40.

  Moreover, although the rotation cleaning body 30 showed one example, two or more may be sufficient. When there are two or more, it is preferable that they are arranged substantially parallel to each other.

  As shown in FIG. 4, a meshing portion 34 extending to the axial end portion is provided at the end portion of the rotary cleaning body 30. The meshing portion 34 is configured to engage with an engaging portion 64 of a large-diameter pulley 62 provided inside the lower case 11 with unevenness. Thereby, the rotary cleaning body 30 is rotationally driven by the electric motor 35 via the power transmission means 60 described later. Then, the dust scraped out by the rotary cleaning body 30 is carried from the suction port 41 to the passage 14 of the suction joint 15 through the suction passage 42 as shown in FIG. 2 (b), and then the extension pipe 5 (FIG. 1). And a suction chamber (not shown) of the cleaner body 2 through the hose portion 3.

  As shown in FIG. 4, the power transmission means 60 includes a small-diameter pulley 61 provided on the electric motor 35 side, a large-diameter pulley 62 provided on the rotary cleaning body 30 side, and a toothed portion suspended between them. Belt 63.

  The small-diameter pulley 61 is attached to the output shaft 36 of the electric motor 35 and rotates by driving of the electric motor 35. The large-diameter pulley 62 is rotatably supported by a bearing portion 40 </ b> A provided at the end of the suction chamber 40. A substantially bottomed cylindrical engaging portion 64 is connected to the large-diameter pulley 62, and the engaging portion 64 is engaged with the meshing portion 34 of the rotary cleaning body 30 with unevenness. It has become.

  According to such power transmission means 60, the driving force of the electric motor 35 is transmitted to the rotary cleaning body 30 side via the small diameter pulley 61, the toothed belt 63, the large diameter pulley 62, and the engagement portion 64. Can do. In the present embodiment, the number of teeth of the small-diameter pulley 61 provided on the electric motor 35 side is set small, and the number of teeth of the large-diameter pulley 62 provided on the rotary cleaning body 30 side is set large. As a result, the reduction ratio is increased, and the drive torque applied to the rotary cleaning body 30 is increased.

  A pair of bearing pressing members 50, 50 constituting a part of the bearing are attached to both ends of the suction chamber 40. Since the pair of bearing pressing members 50 and 50 are formed in a substantially symmetrical shape on the left and right, the bearing pressing member 50 disposed on the lower right side will be described here.

  As shown in FIGS. 3A and 3B, the bearing pressing member 50 includes a front part 51, a rear part 52, and an intermediate part 53 that connects the front part 51 and the rear part 52. Is formed.

  The front portion 51 is formed to bulge downward, and as shown in FIG. 3 (b), a recess 51a for accommodating the end portion of the rotary cleaning body 30 (see FIG. 2 (b)) is formed inside the upper surface thereof. Is formed. A rib 51b is provided in the recess 51a so as to abut against and hold the end of the rotary cleaning body 30. An inner side surface 51 c of the front portion 51 is cut out in an arc shape corresponding to the end portion of the rotary cleaning body 30.

  As shown in FIG. 3A, a brush member (brush) 54 is disposed on the lower surface 51d of the front portion 51. The brush member 54 is located on the bearing pressing member 50 on the extension of the axis of the rotary cleaning body 30 (see FIG. 2A), and is disposed inside the edge portion 51d1 provided on the lower surface 51d. Yes.

  By arranging such a brush member 54, when the brush member 54 acts as a cushioning material and the suction tool 10 is in a forward-facing position, the corners of the suction tool 10 directly touch the cleaning surface. It is possible to prevent the cleaning surface from being damaged. Since the brush member 54 is positioned on the axially outer side of the rotary cleaning body 30 (see FIG. 2B), the dust on the outside of the rotary cleaning body 30 that could not be collected by the rotary cleaning body 30 is suitably used. It can also be collected.

Here, it is preferable that the brush direction of the brush member 54 is inclined toward the rear of the suction tool 10, that is, the brush direction of the brush member 54 is orderly with respect to the traveling direction of the suction tool 10.
Accordingly, the brush member 54 can be prevented from becoming resistant to the progress of the suction tool 10. Further, dust easily passes through the lower surface (lower end) 54a (see FIG. 6) of the brush member 54, and the dust is easily guided to the groove 53b provided in the intermediate portion 53 at the rear of the brush member 54.

The rear portion 52 is formed to bulge downward, and as shown in FIG. 3A, a wheel housing portion 52b is recessed in the lower surface 52a. Bearings 52c are formed on the left and right edge portions of the opening of the wheel housing portion 52b.

The wheel housing portion 52b accommodates a wheel 55 in which a support shaft 55a is inserted and supported by a bearing 52c. The wheel 55 protrudes from the lower surface 52a of the rear part 52 in the state accommodated in the wheel accommodating part 52b (refer FIG. 6). Here, as shown in FIG. 9, the wheel 55 is formed by a bearing portion 55 b that inserts and supports the support shaft 55 a and a contact member 55 c that contacts the floor surface. The contact member 55c is made of, for example, a material obtained by impregnating a felt material, a polyester-based resin foam, a non-woven fabric made of a resin such as polyethylene, and a resin such as NBR (synthetic rubber). This has the advantage that it has moderate elasticity and is excellent in wear as compared with a brush-like wheel.
In the present embodiment, as shown in FIG. 10, the end portion of the contact member 55c is provided with a C-cut surface 55d having a C-surface processed. As a result, as shown in FIG. 11, when cleaning is performed by rotating the suction tool 10 approximately 90 degrees in either the left-right direction and moving the suction tool 10 in the left-right direction V, for example, it is perpendicular to the tatami seam. Even when moved in the direction, the end of the contact member 55c is not caught in the tatami seam, and the tatami can be prevented from being damaged. Further, it is possible to prevent damage to the floor surface of a soft material such as a cypress floor. In addition, if it can prevent damage to the floor surface of a tatami mat or a soft material, it may not be limited to the C cut surface processed by C surface but may be an R cut surface.
Note that the lower surface 52 a of the rear portion 52 is located above the lower surface 51 d of the front portion 51.

  As shown in FIG. 3A, a groove 53b is formed in the intermediate portion 53. The groove 53 b functions as a suction path formed between the cleaning surface and the dust that collects dust outside the rotary cleaning body 30 that could not be collected by the rotary cleaning body 30.

  As shown in FIGS. 3B and 3C, a rib 53 a is formed on the upper surface of the intermediate portion 53 so as to extend between the front portion 51 and the rear portion 52.

  As shown in FIG. 6, the wheel 55 projects downward from the lower surface 54 a of the brush member 54 by a height h. Therefore, on the cleaning surface such as flooring, the wheel 55 comes into contact with the cleaning surface, and the brush member 54 floats from the cleaning surface and is in a non-contact state. On the other hand, on the carpet, the brush member 54 comes into contact with the surface of the carpet at the same time that the wheel 55 comes into contact with the bristle so as to enter into the hair.

  As shown in FIG. 4, the bearing pressing member 50 can be attached to and detached from the both ends of the lower case 11 (removable). As shown in FIG. By removing, the rotary cleaning body 30 can be removed from the suction chamber 40.

  Further, as shown in FIG. 4, by removing the bearing pressing member 50 on the left side of the lower surface, the power transmission means 60 is exposed, and the rotary cleaning body 30 and the large-diameter pulley 62 can be removed. As shown in FIG. 4, the bearing pressing member 50 on the left side of the lower surface can be fixed by inserting a screw (not shown) into a screw hole 52 g provided in the rear portion 52 and fastening it.

  On the other hand, the bearing pressing member 50 on the lower right side is configured to be detachable by rotating the locking member 11c provided in the lower case 11, as shown in FIG. 2 (a). The locking member 11c is pivotable about a pivot shaft 11d supported from above and below by the lower case 11 and the upper case 12, and is biased in a direction to be closed by the lower case 11 by a spring member (not shown). Has been. The locking member 11c has a locking piece (not shown). When the locking member 11c is closed to the lower case 11, the locking piece is locked to the bearing pressing member 50 to lock the bearing pressing member 50 so that it cannot be removed. It is like that. Further, the locking member 11c is configured to release the lock of the bearing pressing member 50 by performing an operation of opening to the near side from the state closed by the lower case 11.

  As shown in FIG. 2 (b), with the bearing pressing members 50, 50 fixed to both ends of the lower surface of the lower case 11, wheels 55, 55 are positioned on the extension of the axis of the fixed brush 17, respectively. ing. Therefore, on the hard and flat cleaning surface such as a plate surface, the contact between the wheels 55 and 55 holds the wheel 55 and 55 at a predetermined height from the cleaning surface, and the fixed brush 17 is more than necessary. It will not stick to the cleaning surface.

  Further, as shown in FIG. 2 (b), in a state where the bearing pressing members 50, 50 are fixed to both ends of the lower surface of the lower case 11, the wheels 55, 55 have a center line O 1 in the front-rear direction of the suction tool 10. It is arranged at a symmetrical position with the symmetry axis. Since the roller 11a1 of the brush drive switch 11a is arranged on the center line O1 in the front-rear direction of the suction tool 10, the center position of the roller 11a1 and the center position of the wheels 55 and 55 are not shown. The line segments are arranged so as to form an isosceles triangle whose apex angle is the center position of the roller 11a1.

Below, the effect acquired by the said structure is demonstrated.
(1) Since the wheel 55 projects downward from the lower surface 54a of the brush member 54 provided on the lower surface 51d of the bearing pressing member 50, when the suction tool 10 generates a suction force on the carpet, the wheel 55 is The suction tool 10 is prevented from coming into close contact with the carpet more than necessary. Thereby, the operation force at the time of moving the suction tool 10 on a carpet is reduced, and the operational feeling of the suction tool 10 can be improved. Moreover, the operativity (self-propelling property) at the time of advance of the suction tool 10 by the drive of the rotary cleaning body 30 can be improved.
(2) Since the wheel 55 is formed of a felt material, a polyester resin foam, or the like, the wheel 55 is easily slipped on the carpet, and the operation force when the suction tool 10 is moved is easily reduced. Therefore, the operational feeling of the suction tool 10 can be improved. Further, since the wheel 55 is easy to slide on the carpet, it is easy to perform an operation at the time of changing the direction. Thereby, the above-described suction body 13 can be easily cleaned by rotating the suction body 13 approximately 90 degrees in either of the left and right directions so that the left and right direction of the suction body 13 is the moving direction.
(3) Since the wheels 55 and 55 are arranged on the extension of the axis of the fixed brush 17, it is possible to suppress the fixed brush 17 from sinking into the carpet and coming into close contact therewith. Thereby, the operation force at the time of moving the suction tool 10 on a carpet is reduced, and the operational feeling of the suction tool 10 can be improved.
(4) Since the wheels 55 and 55 are arranged at symmetrical positions with the center line O1 in the front-rear direction of the suction tool 10 as the symmetry axis, the balance between the left and right is improved, and the suction tool 10 is moved on the carpet. The operating force is reduced.

In addition, the suction tool 10 on the carpet is excellent in straightness and backwardness.
(5) Since the line segment (not shown) connecting the center position of the roller 11a1 and the center position of the wheels 55 and 55 is arranged to form an isosceles triangle having the center position of the roller 11a1 as an apex angle. The balance between the front and rear is improved while securing the left and right balance, and the operating force when moving the suction tool 10 on the carpet is further reduced.
(6) Since the wheel 55 is provided in the bearing pressing member 50, the wheel 55 can be disposed in the suction tool 10 by attaching the bearing pressing member 50, and productivity is improved.

  7 and 8 show a bearing holding member 50 according to a modification. The bearing pressing member 50 shown in FIG. 7 is provided with an opening 52e in the upper part of the wheel housing portion 52b. In other words, the wheel housing portion 52b and the upper surface space (inner space) of the bearing pressing member 50 communicate with each other through the opening 52e.

  Here, the upper surface space of the bearing pressing member 50 communicates with the suction chamber 40 (suction port 41) through a slit 53d or the like provided in the side portion 53c of the intermediate portion 53. Therefore, during operation, a suction air flow is formed from the wheel housing portion 52b to the suction chamber 40 through the opening 52e, the slit 53d, and the like.

  Thereby, dust adhering to or entangled with the wheel 55 and the support shaft 55a can be sucked into the suction chamber 40, and the smooth rotation of the wheel 55 is maintained.

  The bearing pressing member 50 shown in FIG. 8 is configured such that an opening 52f is formed on the lower surface 52a of the rear portion 52, and the wheels 55 are supported by bearings 52c formed on the left and right edges of the opening. That is, the outer space and the inner space (inner space) of the lower surface 52a of the rear portion 52 are communicated with each other through the opening 52f.

  Therefore, during operation, air is sucked in from the outside to the inside of the bearing pressing member 50 through the opening 52f, and then air flows into the suction chamber 40 through the slit 53d provided in the side portion 53c of the intermediate portion 53. Thereby, dust adhering to or entangled with the wheel 55 and the support shaft 55a can be sucked into the suction chamber 40, and the smooth rotation of the wheel 55 is maintained.

  In the above-described embodiment, the wheel 55 is provided on the bearing pressing member 50. However, the present invention is not limited to this, and the wheel 55 is provided on the lower case 11 side so that the wheel 55 faces the bearing pressing member 50 (described above). An opening corresponding to the opening 52f) may be provided, and when the bearing pressing member 50 is attached, the wheel 55 may be configured to protrude to the lower surface (lower surface 52a) of the bearing pressing member 50 through the wheel opening.

  By setting it as such a structure, the structure of the bearing pressing member 50 can be simplified and an assembly property improves.

1 vacuum cleaner 2 vacuum cleaner body 2c electric blower 10 first suction tool (suction tool)
11a Brush drive switch (drive switch)
11a1 Roller 17 Fixed brush 30 Rotating cleaning body 40 Housing portion 50 Bearing holding member 52b Wheel housing portion 54 Brush member (brush)
54a Lower end 55 Wheel 55a Support shaft 55b Bearing 55c Contact member 55d C cut surface O1 Center line

Claims (9)

  A suction tool that communicates with the vacuum cleaner body that generates a suction force; a rotary cleaning body that is disposed in a receiving portion that opens on a lower surface of the suction tool; and a wheel that is provided in the suction tool. A contact member disposed on the outer periphery and in contact with the floor surface, wherein the contact member is a material in which a nonwoven fabric is impregnated with a synthetic resin, and a C-cut surface is provided on at least one end of the contact member; A vacuum cleaner suction tool. In the suction tool of the electric vacuum cleaner of claim 1,
In the suction tool main body, it is arranged in parallel with the rotary cleaning body, and has an electric motor for rotationally driving the rotary cleaning body,
A bearing pressing member that is disposed at an axial end of the rotary cleaning body and detachably holds the rotary cleaning body is provided, and the wheel is disposed on the bearing pressing member. Item 1. A vacuum cleaner suction tool according to item 1.   A fixed brush extending along the axial direction of the rotary cleaning body is provided on the lower surface of the suction tool behind the rotary cleaning body, and the wheel is disposed on an extension of the axis of the fixed brush. The vacuum cleaner suction tool according to claim 1 or 2, wherein the suction tool is a vacuum cleaner.   A roller that also serves as a drive switch for the rotary cleaning body is disposed at the center of the lower surface of the suction tool at the rear of the rotary cleaning body, and is symmetrical with respect to the center line in the front-rear direction of the suction tool. The suction tool for a vacuum cleaner according to any one of claims 1 to 3, wherein the wheel is disposed at a position.   The vacuum cleaner suction tool according to any one of claims 1 to 4, wherein the wheel is provided on the bearing pressing member.   The said wheel is accommodated in the wheel accommodating part provided in the said bearing holding member, The opening connected to the said accommodating part is formed in the said wheel accommodating part, The Claim 5 characterized by the above-mentioned. Vacuum cleaner suction tool. The suction tool includes an upper case and a lower case, and the wheels are provided in the lower case,
The suction tool for a vacuum cleaner according to any one of claims 1 to 3, wherein the bearing pressing member is provided with a wheel opening through which the wheel is inserted. The wheel, a brush provided on the lower surface of the bearing pressing member,
The suction tool for a vacuum cleaner according to any one of claims 1 to 3, wherein the suction tool is disposed at a position projecting downward from a lower surface of the brush from a lower surface of the bearing pressing member. An electric blower for generating a suction force; a vacuum cleaner body provided with a dust collecting chamber on the suction side of the electric blower; a hose body, a handle grip, an extension pipe, and a suction tool 10; In the vacuum cleaner provided with a power line on the handle grip and the extension pipe,
A suction tool connectable between the handle grip and the extension pipe or between the extension pipe and the suction tool 10;
The vacuum cleaner according to any one of claims 1 to 8, wherein the suction tool is a vacuum cleaner.