JP2012005551A - Floor suction tool and vacuum cleaner using floor suction tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor suction tool having the driving part of a rotation brush to be stably operated without being affected by the assembling accuracy of a case and an impact to be received by the case, and also to provide a vacuum cleaner using the floor suction tool.SOLUTION: In the floor suction tool including the case to be an external body, the rotation brush rotatably arranged inside the case, and the driving part for rotationally driving the rotation brush, the driving part includes a driving part case to be an external body independent with the case, driving force generation means, and driving force transmission means for transmitting the driving force from the driving force generation means to the rotation brush. The driving force generation means and the driving force transmission means are arranged in the driving part case and the driving part is attached to the case. Thus, the driving force transmission means is connected to the rotation brush, so as to rotationally drive the rotation brush, so that the problem can be solved.

Description

  The present invention relates to a floor surface suction tool that sucks dust from a surface to be cleaned, and a vacuum cleaner using the floor surface suction tool.

Conventionally, a turbine that rotates with the airflow generated by the suction force of the vacuum cleaner is used as the drive source of the rotary brush that rotates and contacts the cleaning surface provided on the floor suction tool used in the vacuum cleaner (For example, refer to Patent Document 1).
This floor surface suction tool includes a case having a suction port facing the floor surface, an intake passage that guides intake air from the suction port to the main body of the vacuum cleaner, a rotating brush that is arranged facing the suction port, and an intake passage. A turbine fan that rotates by the intake air passing through and rotates the rotating brush via the shaft, a bearing portion that supports the shaft, and a rib that is formed on the main body case that supports the bearing portion are provided.

JP 2001-161610 A

  However, in the floor suction tool disclosed in Patent Document 1, each mechanism that is a drive source of the rotating brush is directly provided in the case. As a result, the drive accuracy of the drive mechanism is affected by the assembly accuracy of the case, and it is difficult to stably maintain the mechanical stability of the drive mechanism due to the impact that the case receives during cleaning. .

  Accordingly, the present invention solves the above-described problem, and a floor surface suction tool having a rotary brush drive unit that operates stably without being affected by the assembling accuracy of the case or the impact received by the case, and the floor. It aims at providing the vacuum cleaner using a surface suction tool.

  In order to solve the above-described problems, a floor surface suction tool includes a case that forms an outer shell, a rotary brush that is rotatably provided inside the case, and a drive unit that rotationally drives the rotary brush. The drive unit includes a drive unit case that forms a separate shell from the case, a drive force generation unit, and a drive force transmission unit that transmits the drive force from the drive force generation unit to the rotary brush. The driving unit case is provided with the driving force generating unit and the driving force transmitting unit, and by attaching the driving unit to the case, the precursor driving force transmitting unit is connected to the rotating brush, It is possible to solve the above-mentioned problem by configuring so as to be able to be rotationally driven.

  According to the present invention, the drive unit includes a drive unit case (turbine case), which is an outline of the drive unit, and includes a component that constitutes a turbine, a mechanism that transmits the drive force from the turbine, and a component that transmits the drive force to the rotating brush. Since the unit is separate from the case, the floor suction tool can be made less susceptible to the accuracy of assembly of the case and the impact received by the case.

Overall appearance of a vacuum cleaner using a floor suction tool according to the present invention The perspective view which looked at the floor surface suction tool S from the front 2 is an exploded perspective view of FIG. The perspective view which looked at floor surface suction tool S from back The perspective view which looked at floor surface suction tool S from the lower part 5 is a perspective view showing a process of attaching and detaching the rotating brush in FIG. Top view of floor suction tool viewed from above FIG. 7 is a plan view showing a state in which the upper cover 46 is removed. 7 is a cross-sectional view taken along the center of the rotating brush and parallel to the lower surface of the case 40. Plan view seen from the lower case side of the floor suction tool S Side view of drive section side of floor suction tool S DD sectional view of FIG. 7 is a schematic cross-sectional view showing the state of the suction cylinder and the connecting pipe in the DD cross section of FIG. 7. (A) State where the floor surface suction tool S is on the surface to be cleaned (b) Floor surface suction tool S is the surface to be cleaned Lifted from Sectional drawing of the rotating brush 60 cut by a plane passing through the shaft 60g Exploded perspective view of rotating brush 60 Sectional drawing which looked at the AA cross section of FIG. 7 from the front (state which the rotating brush 60 removed) 16 is a cross-sectional view showing the process of attaching and detaching the brush in FIG. The perspective view which shows the combined state of the rotating brush 60 and the dust removal tool 43. 7 is a cross-sectional view of the AA cross section of FIG. 7 as viewed from the front (with a rotating brush attached). The top view which shows the connection state of each pulley of the drive part 70 The perspective view which looked at the drive part 70 from the attachment side to the floor surface suction tool S BB sectional view of FIG. CC sectional view of FIG. Exploded perspective view of drive unit The top view which shows the modification of the air path F (state which removed the upper cover 46) EE sectional view of FIG. Modification of floor suction tool S shown in FIG. FF sectional view of FIG. Modification of front edge 41g of floor suction tool S

Embodiments will be described with reference to the drawings.
FIG. 1 is an overall external view of the electric vacuum cleaner according to the present embodiment.
The vacuum cleaner C includes a vacuum cleaner main body 10, a hose 20 connected to the vacuum cleaner main body 10, a gripping portion 21 for operating an operation mode of the vacuum cleaner provided at the tip of the hose 20, Dust is removed from the hand operating portion 21 a provided in the gripping portion 21, an extendable tube 30 connected to a pipe forming the gripping portion 20, and a surface to be cleaned G connected to the extension tube 30. A floor surface suction tool S for suction is provided.

  The electric vacuum cleaner C configured in this way has a surface to be cleaned G from a suction port that opens to the floor surface suction tool S by a suction force generated by an electric blower (not shown) mounted on the vacuum cleaner body 10. The dust is sucked and conveyed through the extension pipe 30 and the hose 20 to a dust collecting part (not shown) provided in the cleaner body 10.

Next, the floor suction tool S will be described mainly with reference to FIGS.
The floor suction tool S includes an outer case 40, an upper cover 46 provided on the upper surface of the case 40 (upper surface of the upper case 42) at a predetermined interval, and the extension pipe 30 provided at the center of the rear portion of the case 40. And the like, a rotating brush 60 that scrapes off dust adhering to the surface G to be cleaned and improves the dust collecting performance, and a driving unit 70 that is a power unit for obtaining the rotational driving force of the rotating brush 60. It is composed of
In addition, although there exists what drives the rotary brush 60 rotationally using an electric motor about the drive part 70, in this Embodiment, the turbine which utilizes the airflow produced by the attraction | suction force of the electric blower with which the cleaner main body 10 was equipped is used. This will be explained using what was used.

Hereinafter, each part of the floor suction tool S will be described in detail.
The case 40 includes a substantially box-shaped lower case 41 that forms the lower outer side of the floor surface suction tool S, and a substantially box-shaped upper case 42 that forms the upper side of the outer shell, and the lower case 41 and the upper case 42 are aligned vertically. It is constituted by.

The bottom plate of the lower case 41 serving as the bottom of the case 40 is formed with a suction port 41a that opens in the longitudinal direction for sucking dust from the surface to be cleaned. A rotary brush storage chamber 40a in which the rotary brush 60 is stored is formed between the suction port 41a and the upper case 42 by securing a predetermined space. That is, it has a structure in which the suction port 41a is opened in the rotating brush storage chamber 40a.
A dust collecting air passage 45 communicating with a connecting portion 50 described later is formed by the upper case 42 and the lower case 41 at the rear of the rotating brush storage chamber 40a, that is, in the downstream direction of the sucked airflow. The dust collection air passage 45 is an air passage through which the airflow mixed with dust sucked from the suction port 41 a flows down toward the connecting portion 50, that is, toward the outside of the case 40.

In the center of the rear part of the case 40, a connection part attachment port 40e, which is an opening to which the connection part 50 is attached, is formed.
This connection part attachment port 40e forms a notch part in the center of the rear part of the lower case 41 and the upper case 42, respectively, and when the lower case 41 and the upper case 42 are combined vertically, these notch parts are combined. An opening is formed.

Next, on one side wall of the case 40, a substantially circular drive unit mounting opening for inserting a drive side mounting guide 73 of the drive unit 70 that fits into one end of the rotating brush 60 described later into the inside of the case 40. 40b is formed.
The drive portion mounting opening 40b is formed with semicircular cutouts at the ends of the side walls of the lower case 41 and the upper case 42, respectively, and when the lower case 41 and the upper case 42 are joined together in the vertical direction, A circular opening is formed by combining the notches.

Next, on the other side wall of the case 40, a rotating brush 60 described later is inserted into the rotating brush storage chamber 40a and partially fixed in a substantially circular shape that is a position where the fixed side mounting guide 60e of the rotating brush 60 is engaged. A rotating brush mounting opening 40c having a concave shape is opened.
The rotating brush mounting opening 40c forms notches with a combination of a semicircular shape and a concave shape on the side walls of the lower case 41 and the upper case 42, respectively, so that the lower case 41 and the upper case 42 are aligned vertically. In this case, these cutout portions are formed together.

Next, at the end of the rotating brush storage chamber 40a on the rotating brush mounting opening 40c side and at a position that does not overlap vertically with the suction port 41a, the ring-shaped dust that removes hair and the like attached to the rotating brush 60 is removed. A dust removal tool storage chamber 44 is formed for storing the removal tool 43 rotatably in the ring-shaped circumferential direction.
The dust removing tool 43 includes a ring portion 43a and a claw portion 43b standing from the ring portion 43a. Note that the number of the claw portions 43b is the same as the number of spiral grooves 60b of the rotating brush 60 described later. Further, the direction in which the claw portion 43 b stands is directed toward the drive portion mounting opening 40 b in a state where the ring portion 43 a is attached to the dust removing tool storage chamber 44.

Next, the dust removing tool storage chamber 44 has three ribs 41 b, 41 c, 41 d each formed with a semicircular cutout standing from the lower case 41 and a semicircular shape standing from the upper case 42. The three ribs 42b, 42c, and 42d formed with the notches are formed by aligning these notches vertically when the lower case 42 and the upper case 41 are vertically aligned.
In addition, in order to ensure the rotation space of the dust removal tool 43, the downward direction (the lower case 41 side) of the rotating brush storage chamber 40a is opened to such an extent that the dust removal tool 43 cannot be removed.

The semicircular notches formed in the ribs 41b, 41d, 42b, and 42d located on the rotating brush storage chamber 40a side and the rotating brush mounting opening 40c side are the outer diameters of the ring portion 43a of the dust removing tool 43. Smaller than. The semicircular cutouts of the ribs 41c and 42c located at the center of these ribs are formed larger than the outer diameter of the ring portion 43a.
Accordingly, the dust removal tool storage chamber 44 is formed at a position sandwiched between the ribs positioned on the rotary brush storage chamber 40a side and the rotary brush mounting opening 40c side. The removal tool 43 is held without being removed from the storage chamber.

Furthermore, the ribs 41b, 41c, 41d and the ribs 42b, 42c, 42d are parallel to each other, and are configured to be parallel to the traveling direction when the floor suction tool S is used.
That is, the dust remover storage chamber 44 holds the dust remover 43 in a state parallel to the traveling direction when the floor suction tool S is used.
The centers of the rotary brush mounting opening 40c, the dust removing tool storage chamber 44, the dust removing tool 43 held in the hair removal storing chamber 44, and the driving unit mounting opening 40b described above are substantially coaxially arranged on the floor surface suction tool. 40 are lined up inside.

Here, the rotating brush 60 attached to the case 40 will be described mainly with reference to FIGS.
The rotating brush 60 has a plurality of spiral grooves 60b formed on the outer periphery of a body shaft 60a into which a rod-shaped shaft 60g serving as a rotating shaft of the rotating brush 60 is inserted, and between the adjacent grooves. A brush 60c is helically provided toward the outer direction of the rotating brush.
In the drawing, the brush 60c uses a strip-like one made of a flexible resin or the like, but may be a hair-like one extending outward of the rotating brush.

A recess 60d is formed at one end of the main body shaft 60a, into which a driving side mounting guide 73 of the driving unit 70 described later is fitted and engaged. A groove 60j that is parallel to the shaft 60g is formed in the recess 60d.
The groove 60j is engaged when a power transmission rib 73a formed in a driving side mounting guide 73, which will be described later, enters from the axial direction of the shaft 60g, and rotates around the recess 60d with respect to the rotation of the driving side mounting guide 73. It is a detent structure to prevent it.
A stopper 60w is provided on the tip end side of the shaft 60g on the recess 60d side so that the shaft 60g does not come off from the main body shaft 60a.

Next, in the recess 60i formed at the other end of the main body shaft 60a, a fixed-side mounting guide receiving portion 60h is fixed by press-fitting with the shaft 60g penetrating inside.
Then, on the opposite side of the fixed-side mounting guide receiving portion 60h where the main body shaft 60a is located, a fixed-side mounting guide 60e having a bearing 60r therein is attached to the shaft 60g with the bearing 60r pivotally supporting the shaft 60g. On the other hand, it is provided rotatably.

Note that two ring-shaped lubricating plates 60k are provided between the fixed-side mounting guide receiving portion 60h and the bearing 60r with the shaft 60g passing through the ring opening. This lubricating plate 60k reduces the contact resistance between the fixed side mounting guide 60e fixed to the case 40 and the fixed side mounting guide receiving portion 60h that rotates together with the main body shaft 60a when the rotating brush 60 rotates, and efficiently. This is for rotating the main body shaft 60a.
Further, a stopper 60m is provided on the distal end side of the shaft 60g penetrating the fixed side mounting guide 60e as viewed from the fixed side mounting guide 60e so that the fixed side mounting guide 60e does not come off from the shaft 60g.

The retainer 60m is attached to the shaft 60g so that a clearance is formed between the fixed side mounting guide 60e and the axial direction (left and right direction in the drawing) of the shaft 60g of the fixed side mounting guide receiving portion 60h. By configuring in this way, even if the size of the case 40 or the rotating brush 60 varies due to manufacturing errors or the like, it is possible to assemble each part and to rotate the rotating brush 60 smoothly. ing.
In addition, by providing an elastic body (for example, a spring or a wave washer) in the clearance formed as described above, the above effects can be achieved and dust such as lint and hair can be prevented from entering the clearance. Can do.

Next, a cover 60n is fixed to the fixed side mounting guide 60e by press fitting so as to cover the retaining 60m.
The cover 60n is formed with a through hole 60t that is an opening. By forming the through hole 60t, after the rotary brush 60 is washed with water, the water that has entered the gap between the cover 60n and the fixed side mounting guide 60e can be discharged to the outside, and the heat generated in the bearing 60r. Can be discharged to the outside of the rotating brush 60 to cool the bearing 60r.

In particular, by forming a through hole communicating with the brush chamber in the fixed side mounting guide 60e, an airflow flowing from the through hole 60t to the brush chamber can be formed when the floor surface suction tool is used. It becomes possible to promote the cooling of 60r.
Further, by forming a raised portion 60v on the cover 60n which is the end of the rotating brush 60, the impact force received when using the floor suction tool is reduced, and the raised portion 60v is made a curved surface so that furniture or walls It is possible to reduce the catch with.

Next, the fixed side mounting guide 60e is formed with a convex portion 60f that is rotatable together with the fixed side mounting guide 60e and protrudes in the circumferential direction.
When the fixed side mounting guide 60e is mounted in the rotating brush mounting opening 40c, the convex portion 60f is inserted from the concave portion of the rotating brush mounting opening 40c, and the locking piece 60s is rotated with respect to the fixed side mounting guide 60e. As a result, the left and right positions of the concave portion and the locking piece 60s are shifted and engaged with the rotary brush mounting opening 40c.

As a result, the fixed side mounting guide 60e is fixed to the rotating brush mounting opening 40c so that it cannot be removed.
The fixed-side mounting guide 60e is rotatably provided with respect to the main body shaft 60a. Therefore, even if the fixed-side mounting guide 60e is fixed to the rotating brush mounting opening 40c, the main body shaft 60a remains in the rotating brush storage chamber 40a. It is stored in a rotatable manner.

Next, the drive unit 70 that generates the rotational driving force of the rotating brush will be described mainly with reference to FIGS.
The drive unit 70 is a turbine case 71 that is a drive unit case constituting an outer shell that is a separate body from the case 40, and driving force generating means that rotates by an air flow provided inside the turbine case 71 and generates a driving force. The turbine 72, a driving side mounting guide 73 that is attached to one end of the rotating brush and transmits the rotational driving force of the turbine 72, and the rotational driving force of the turbine 72 is transmitted to the driving side mounting guide 73 via each pulley. A belt 74 and a locking portion 75 for preventing the belt 74 from falling off the floor suction tool 40 when the drive unit 70 is attached to the floor suction tool 40 are provided.
The belt 74, the driving side mounting guide 73, and each pulley described later constitute driving force transmitting means for transmitting a driving force from a turbine, which is a driving force generating means, to the rotating brush.

The turbine case 71 includes a main body portion 71a, a lid portion 71b, and a cylindrical portion 71c.
A shaft opening 71 s to which the shaft 73 j of the driving side mounting guide 73 is attached, a shaft opening 71 t to which the shaft 72 j of the turbine 72 is attached, and the rotational driving force of the turbine 72 are transmitted to the driving side mounting guide 73. A recess 71u that supports one end of the shaft 76j of the intermediate pulley 76, a turbine opening 71v that causes the air to flow down to the turbine 72, and a rectifying unit 71w that rectifies the air flowing to the turbine 72 formed in the opening 71v; An intake side cone portion 71x that guides the air flowing down to the opening 71v is formed.

The lid 71b is formed with an introduction opening 71h through which air is introduced into the drive unit 70, and a recess 71m is formed at a position avoiding the introduction opening 71h. The introduction opening 71h is covered with a breathable filter.
The cylindrical portion 71c has a cylindrical shape and is a shape that is narrowed toward the distal end. An exhaust-side cone 71y that rectifies the air flowing down from the turbine 72 is provided inside the cylindrical portion 71c by ribs 71z that stand from the inner wall. The exhaust side cone 71y has a substantially conical shape and is provided in the downstream direction of the airflow flowing down the tip.

Next, each part is provided in the main body 71a as follows.
First, a bearing 73u is provided in the shaft opening 71s. The bearing 73u is provided with a shaft 73j rotatably supported through the inside of the bearing and the shaft opening 71s. A driving side mounting guide 73 is provided on one end side of the shaft 73j, and a mounting guide pulley 73b is provided on the other end side. Here, the position where the belt 74a is attached to the mounting guide pulley 73b is configured to be as close to the bearing 73u as possible.
A washer 73w is provided between the bearing 73u and the drive side mounting guide 73 and between the bearing 73u and the mounting guide pulley 73b to suppress friction of each part during operation.

Next, a bearing 76u is provided in the recess 71u. A shaft 76j is rotatably supported on the bearing 76u. An intermediate pulley 76 is provided on the shaft 76j, and a belt 74a is hung on the belt position (small pulley) on the bearing 76u side.
A washer 76w is provided between the pulley 76 and the bearing 76u to suppress friction of each part during operation.

Next, the shaft opening 71t is provided so that the bearing 72u and the bearing 72s can support the same shaft. The bearing 72u and the bearing 72s are provided with a shaft 72j rotatably supported through the shaft opening 71t.
A pulley 72a is provided at one end of the shaft 72j, and a turbine 72 is provided at the other end. The shaft 72j, the pulley 72a, and the turbine 72 are configured to rotate together. .
A washer 72w is provided between the pulley 72a and the bearing 72u, and between the turbine 72 and the bearing 72s to suppress friction of each part during operation.

The turbine 72 provided in this way is at a position where the turbine opening 71v and the rectifying unit 71w that rectifies the air flowing to the turbine 72 face each other.
Incidentally, the belt 74b that is hung on the intermediate pulley 76 and the turbine pulley 72a is hung on a position of the pulley 76 (large pulley) far from the position of the belt 74a of the pulley 76 when viewed from the bearing 71u side.
Accordingly, the pulley 72a is located away from the turbine 72, and the dome-shaped intake side cone portion 71x rising from the edge of the turbine opening 71v can be disposed between the pulley 72a and the turbine opening 71v (shaft opening). 71t is located inside the intake-side cone portion 71x).

Next, the lid 71b is attached to the main body 71a on the side where the pulleys and belts are arranged as described above. At this time, a bearing 76v is attached to the recess 71m formed in the lid portion 71b, and the end of the shaft 76j is pivotally supported on the bearing 76v, and the shaft 76j is pivotally supported with respect to the turbine case 71. Is done.
A washer 76w is provided between the bearing 76v and the intermediate pulley 76 to suppress friction of each part during operation.
By attaching the lid portion 71b to the main body portion 71a as described above, driving mechanisms such as pulleys and belts are accommodated in the space surrounded by the main body portion 71a and the lid portion 71b, and air is introduced into the interior from the introduction opening 71h. A drive chamber 71r capable of inflow is formed.

Next, the cylinder part 71c is attached to the main body part 71a on the side where the turbine 72 is located so as to surround the turbine 72, the turbine opening 71v, and the cone 71x.
At this time, the exhaust-side cone 71y having a substantially conical shape provided inside the cylinder portion 71c is configured such that a straight line connecting the center of the circle constituting the bottom surface and the tip of the cone coincides with the rotation center of the turbine 72. Has been.

The opening on the side that is not the attachment position of the cylinder portion 71c to the main body portion 71a is an exhaust port 71d that discharges the air that has passed through the turbine 72 to the outside of the drive unit. Further, the opening serving as the exhaust port 71d has a shape that narrows toward the tip (a shape that is narrowed toward the tip), and this shape is a shape that follows the outer shape of the exhaust-side cone 71y. It is.
The exhaust-side cone 71y is supported by three ribs 71z, and at least one of the ribs 71z is arranged to face the floor surface direction.

In other words, in the turbine case 71, an introduction opening 71h serving as an introduction port for introducing an air flow for rotating the turbine 72 is formed on one side, and the turbine case 71 is arranged on the other side. An exhaust port 71 d through which the airflow that has passed through 72 is exhausted to the outside, and a drive side mounting guide 73 project from the inside of the turbine case 71.
In the internal space of the turbine case 71, a turbine 72 is rotatably supported between the introduction opening 71h and the exhaust port 71d.

  Further, an intermediate pulley 76 is provided between the turbine pulley 72 a and the guide pulley 73 b inside the turbine case 71. The intermediate pulley 76 is for converting the rotational driving force generated in the turbine 72 into an appropriate rotational speed / torque and transmitting it to the mounting guide portion 73a.

The turbine-side pulley 72a and the intermediate pulley 76, and the intermediate pulley 76 and the guide-side pulley 73b are connected by belts 74a and 74b, respectively, so that the rotational driving force of the turbine 72 can be transmitted to the drive-side mounting guide 73. .
As in this embodiment, an intermediate pulley for deceleration is interposed between the turbine side pulley 72a and the guide side pulley 73b to adjust the rotational driving force transmitted to the drive side mounting guide 73. However, the turbine side pulley 72a and the guide side pulley 73b may be directly connected by a belt.

Next, the drive side mounting guide 73 has a substantially cylindrical base 73b and power transmission ribs 73a formed at intervals of 90 degrees with respect to the rotation center of the base 73b. The power transmission rib 73a has an arcuate shape (or arcuate shape) viewed from the direction perpendicular to the axial direction of the shaft 60g when the respective portions are assembled, and is attached to the shaft 60g when the respective portions are assembled. It protrudes in the radial direction from the base 73b so as to be parallel to the base 73b.
The drive side mounting guide 73 is provided with a guide pulley 73c coaxially.

The drive side mounting guide 73 is rotatably supported by the guide opening 71g so that the power transmission rib 73a is located outside the turbine case 71 and the guide pulley 73c is located inside the turbine case 71. ing.
Further, a pulley 76 is provided between the turbine pulley 72 a and the guide pulley 73 c inside the turbine case 71. The pulley 76 is for converting the rotational driving force generated in the turbine 72 into an appropriate rotational speed / torque and transmitting it to the drive side mounting guide 73.

The turbine-side pulley 72a and the pulley 76, and the pulley 76 and the guide-side pulley 73b are connected by belts 74a and 74b, respectively, so that the rotational driving force of the turbine 72 can be transmitted to the drive-side mounting guide 73.
As in this embodiment, the rotational driving force transmitted to the driving side mounting guide 73 is adjusted by interposing a deceleration pulley between the turbine side pulley 72a and the guide side pulley 73b. However, the turbine pulley 72a and the guide pulley 73b may be directly connected by a belt.

The drive unit 70 configured in this way constitutes the floor surface suction tool S by being attached to the case 40 as follows.
Referring mainly to FIGS. 19 and 23, first, the cylindrical portion 71c of the turbine case 71 is inserted into the communication opening 46a, which is a circular opening formed by the upper cover 46 and the upper case 42 being vertically joined. At the same time, a driving side mounting guide 73 provided in the turbine case 71 is inserted into the driving unit mounting opening 40b. The communication opening 46 a and the drive unit mounting opening 40 b are located on the side surface of the same case 40.

And the latching | locking part 75 provided in the drive part 70 latches to the engagement opening 46b of case 40, and the drive part 70 is reliably attached to the floor surface suction tool 40. FIG.
Here, the latching portion 75 is engaged through the engagement opening 46b by being biased upward by the spring 75a, and by pushing down the latching portion 75, both members are engaged. It can be canceled. Thereby, the drive part 70 can be removed from the case 40.

That is, in the present embodiment, the drive unit 70 is attached from the side of the case 40. Further, the introduction opening 71h of the turbine case 71 is formed in the lid portion 71b so as to open to the side in a state where the driving unit 70 is attached to the case 40, but a part of the opening is directed upward. It may be opened.
In this way, if the opening is formed so as to face upward, air can be sucked into the drive unit from above even if the introduction opening 71h facing sideways is blocked by a wall or the like during cleaning.

Since the drive unit 70 is attached to the floor suction tool 40 as described above, the rotary brush storage chamber 40a, the space K, the introduction opening 71h and the exhaust port 71d of the drive unit 70 communicate with each other to form the air path F. In addition, an airflow capable of rotating the turbine 72 can be obtained by generating a suction force generated by the electric blower for the drive unit 70 as well.
That is, the airflow flowing in from the introduction opening 71h is driven to rotate the turbine 72 by the suction force generated by the electric blower, and is discharged from the exhaust port 71d. The discharged airflow is an air passage formed by the upper case and the upper cover. After flowing down F, the air flows into the rotating brush storage chamber 40a from the front opening of the upper case 42, and flows down to the connection portion 50 through the dust collecting air passage together with the airflow flowing in from the suction port. Details will be described later.

The rotational driving force of the turbine 72 generated in this way is first transmitted to the intermediate pulley 76 by the belt 74b, and then transmitted from the intermediate pulley 76 to the driving side mounting guide 73 by the belt 74a.
Then, as will be described later, the rotary brush 60 attached to the drive side mounting guide 73 is rotationally driven.

The drive unit 70 configured as described above is a turbine case, which is an outer shell of the drive unit, including a turbine 72, a component that constitutes a mechanism that transmits the drive force from the turbine 72, and a component that transmits the drive force to the rotary brush 60. The unit is separated from the case 40 to form a unit.
Thus, by making the drive unit 70 a unit configuration independent of the case 40, the drive unit can be configured to be less susceptible to the assembly accuracy of the case 40 and the impact received by the case.

Moreover, since the drive part 70 is comprised with the unit separate from the case 40, the drive part 70 can be easily attached or detached from the case 40. FIG.
Thereby, when washing the floor suction tool S with water, the drive part which uses many bearings which dislike moisture can be removed and washed, and each part of the floor suction tool S can be maintained according to the characteristics. .

Further, since the pulley 72a is configured so that the belt 74b is placed at a position away from the turbine 72, the lengths of the intake side cone 71x and the exhaust side cone 71y positioned in the front and rear of the turbine 72 in the axial direction are set. Can be larger.
Accordingly, the size of the drive unit 70 can be made more compact, and the intake side cone 71x and the exhaust side cone 71y, which are parts for rectifying the airflow flowing down from the introduction opening 71h toward the exhaust hole 71d, can be taken longer. It becomes possible.

  The exhaust-side cone 71y is supported by three ribs 71z inside the cylindrical portion 71c, and at least one of the ribs 71z is arranged to face the floor surface direction. Therefore, the floor suction tool S can be configured to be more robust against the impact received from the floor surface side during use.

  Further, the exhaust port 71d of the cylinder portion 71c is configured to have a shape narrowed toward the tip (a shape narrowed toward the tip) following the outer shape of the exhaust-side cone 71y. By being configured in this way, the pressure loss of the airflow passing through the turbine 72 and flowing down to the exhaust port 71d can be suppressed as much as possible, and the cylindrical portion 71c can be made compact.

Moreover, you may provide the support | pillar which supports between the cover part 71b and the main-body part 71a in the vicinity of the recessed part 71m of the cover part 71b.
As a result, when the floor suction tool S is used, the deformation of the turbine case 71 can be prevented even if an impact is received from the lid portion 71b side, and the impact applied to the drive mechanism inside the turbine case 71 can be prevented. Can be relaxed.

Further, when the floor suction tool S is viewed from the side where the drive unit 70 is attached, a cover for the belt 74b may be provided in the lid portion 71b overlapping the belt 74b without forming the introduction opening 71h. .
Thereby, it is possible to prevent a finger or a foreign object from being caught between the pulleys and the belt 74b that are rotationally driven.
Further, a cover may be provided between the belt 74a and the introduction opening 71h. Thereby, even if the filter provided in the introduction opening 71h is damaged, it is possible to prevent a finger or a foreign object from being caught between the pulleys and the belt 74a that are rotationally driven.

Next, attachment / detachment of the rotating brush 60 from the inside of the case 40 will be described.
(1) Attaching the rotating brush 60 First, the rotating brush 60 is inserted into the rotating brush mounting opening 40c from the end on the side where the recess 60d is formed.
At this time, the rotating brush 60 is inserted into the internal opening of the ring portion 43a of the dust removing tool 43, and the claw portions 43b of the ring portion 43a are fitted in the plurality of grooves 60b of the rotating brush 60 (nail The portion 43a is guided by the groove portion 60b).
When the rotating brush 60 is inserted into the ring portion 43a, the brush 60c passes through the ring portion 43a while being bent, and proceeds toward the drive side mounting guide 73.

When the rotating brush 60 is further inserted toward the drive side mounting guide 73, the claw portion 43a is in contact with the rotating brush 60 while following the groove portion 60b formed in a spiral shape, the rotating brush is inserted. Rotate in the dust removal tool storage chamber without countering.
Since the claw portion 43b is formed with its tip directed in the direction in which the drive portion mounting opening 40b is located (inward of the case 40), a large resistance is required when the rotating brush 60 is mounted in the rotating brush storage chamber. Not.

Next, when the rotating brush 60 is inserted to the position of the driving side mounting guide 73 of the driving unit 70, the driving side mounting guide 73 is fitted into the recess 60d. At this time, the power transmission rib 73a enters the groove 60j from the axial direction, and is held in the rotational driving direction of the driving side mounting guide 73 in the groove 60j, thereby preventing idle rotation in the recess 60d of the driving side mounting guide 73. .
Further, when the power transmission rib 73a enters the groove 60j from the axial direction, since the power transmission rib 73a has an arc shape, the power transmission rib 73a is not easily caught on the wall surface forming the groove 60j and can be efficiently mounted.

Then, in a state where the driving side mounting guide 73 is fitted in the concave portion 60d, the convex portion 60f of the fixed side mounting guide 60e is inserted from the concave portion of the rotating brush mounting opening 40c, and the fixed side mounting guide 60e is rotated. Thus, the mounting guide 60e is fixed to the rotating brush mounting opening 40c and cannot be removed, and the falling of the rotating brush 60 from the case 40 is prevented.
Thus, the rotating brush 60 is correctly attached to the rotating brush storage chamber 40a.

  When the rotary brush 60 is attached to the rotary brush storage chamber 40a, the claw portion 43b is held in a state following the groove portion 60b of the rotary brush and is driven to rotate together with the rotary brush. Thus, if the nail | claw part 43b is hold | maintained in the state which followed the groove part 60b, when removing the rotating brush 30 from a floor surface suction tool, it is not necessary to align the position of the nail | claw part 43b and the groove part 60b anew.

(2) Removal of the rotating brush 60 First, the fixed side mounting guide 60e is rotated, the concave shape of the mounting opening 40c is aligned with the position, the fixing of the mounting opening 40c and the fixed side mounting guide 60e is released, and the fixed side mounting guide is released. By pulling 60e, the rotating brush 60 can be pulled out from the mounting opening 40c.
When the rotating brush 60 begins to be pulled out from the floor suction tool, the claw portion 43b rotates within the dust removing tool storage chamber 44 without following the pulling operation of the rotating brush 60 following the groove portion 60b formed in a spiral shape. To do.

  At this time, the claw part 43a follows the groove part 60b, so that dust such as hair and lint entangled around the rotary brush 60 is peeled off from the shaft and the brush. And when the rotating brush 60 passes the ring part of a dust removal tool, dust is scraped off from the surface of the rotating brush 60.

As described above, by forming the groove 60j in the power transmission rib 73a and the recess 60d of the drive side mounting guide 73, both members can be easily attached and detached.
Further, since the outer shape of the power transmission rib 73a is circular (bowed), even if the rotary brush 60 is inclined with respect to the drive side mounting guide 73, power is transmitted to the inner wall surface of the groove 60j (inner wall surface of the recess 60d). The rib 73a does not contact in the radial direction (does not contact strongly). In other words, the power transmission rib 73a has a relief shape that does not make strong contact with the groove 60j in the radial direction when the rotary brush 60 is inclined.
That is, the engagement relationship between the power transmission rib 73a and the groove 60j is configured as a universal joint structure (universal joint).

  This makes it possible to install the rotating brush diagonally with respect to the bearing locking recess due to manufacturing errors in the size of each part constituting the floor surface suction tool or inadequate installation of the rotating brush, or when cleaning the floor. Even when the rotating brush 60 is inclined with respect to the driving side mounting guide 73 when the rotating brush gets over the convex portion of the surface, the power transmission rib 73a and the groove 60j obstruct the rotation for transmitting the driving force. Therefore, the rotational driving force from the driving side mounting guide 73 can be reliably transmitted to the rotating brush 60.

  Further, dust attached to the rotating brush 60 can be removed while removing the rotating brush 60 from the case 40. In particular, if the rotary brush is pulled out with the suction port of the floor suction tool 40 facing upward, the dust taken from the rotary brush will fall into the floor suction tool S. Will not pollute the

In addition, the dust removing tool 43 rotates in accordance with the shape of the groove 60b both when the rotating brush 60 is attached and removed, so that the resistance when attaching and removing the rotating brush due to the provision of the dust removing tool 43 is minimized. Is possible.
Further, since the dust removing tool 43 rotates following the shape of the groove 60b, the shape of the groove 60b is not limited to a linear shape, and the shape of the groove 60b can be configured by a curve such as a spiral shape. .
Further, a knob portion 60u protruding in the radial direction is formed at a position away from the shaft 60g of the fixed side mounting guide 60e. As a result, even if hair, lint, or the like wraps around the fixed-side mounting guide 60e, the removal operation of the fixed-side mounting guide 60e can be performed with less force.

The attachment / detachment of the rotary brush 60 has been described above. In FIG. 18, the brush 60 is omitted from the portion where the brush 60c and the dust remover 43 overlap in order to easily explain the relationship between the dust remover 43 and the brush 60c. Expressed.
In an actual form, when the rotary brush 60 moves in the dust removing tool 43, the brush 60c passes through the ring portion 43a in a bent state.

Next, a front traveling roller 41r for improving the operability of the floor suction tool S is rotatably provided in the lower case 41 in front and rear of the brush storage chamber 40a.
The screw boss receiver 40d on the front side used for assembling the lower case 41 and the upper case 42 is outside the traveling roller provided on the front side of the lower case 41 so as not to block the airflow in the brush storage chamber 40a, that is, The brush storage chamber 40a is disposed outside.

Next, mainly with reference to FIGS. 8 and 12, the air path F that rotates the turbine 72 provided in the drive unit 70 and causes the airflow discharged from the drive unit 70 to flow down will be described.
First, the upper case 42 is provided with an upper cover 46 that covers the upper surface and the front side of the upper case 42 at a predetermined distance from the upper surface of the upper case 42. A front opening 42a is formed in the longitudinal direction in front of the upper case 42, and the space K surrounded by the upper case 42 and the upper cover 46 communicates with the rotary brush storage chamber 40a.

Further, the upper case 42 and the upper cover 46 are joined together on the rear side of the upper case 42 on the side where the drive part mounting opening 40b is formed, thereby forming a communication opening 46a that communicates with the exhaust air passage of the drive part 70. (See FIG. 3). The communication opening 46a and the exhaust port 71d communicate with each other, and the inside of the drive unit 70 is in a positional relationship with the space K.
Since each part is configured as described above, when the drive unit 70 is attached to the case 40, the introduction opening 71h and the exhaust port 71d of the drive unit 70, the space K, the front opening 42a, and the brush storage An air passage F for rotationally driving the turbine 72 in which the chamber 40a and the dust collection air passage 45 communicate with each other is configured.
That is, the rotary brush storage chamber 40a is positioned in the air path F for rotating the turbine 72.

Therefore, the airflow flowing in from the introduction opening 71h flows down inside the driving unit 70, is discharged from the exhaust port 71d to the communication opening 46a, flows down into the space K, and passes through the front opening 42a and passes through the rotary brush. It flows into the storage chamber 40 a and reaches the dust collecting air passage 45.
The upper cover 46 is formed with an engagement opening 46 b that engages with the locking portion 75 of the drive unit 70 when the drive unit 70 is attached to the floor suction tool 40.

By configuring the air path F as described above, each part operates and operates as follows.
(Cleaning the surface to be cleaned)
First, in the state where the floor surface suction tool S is cleaning the surface to be cleaned, the suction port 41a faces the floor surface in close proximity, so the amount of airflow from the suction port 41a decreases, and the floor surface The degree of vacuum inside the suction tool S is increased. That is, the air pressure inside the floor suction tool S is lower than the external space.

Then, air flows as an air current from the introduction opening 71h of the drive unit 70 attached to the case 40 to the inside of the floor surface suction tool S where the atmospheric pressure is low, and flows down the air path F to connect the connection part. Flows in 50 directions.
Therefore, since the turbine 72 is rotationally driven by the airflow flowing down the air path F generated at this time, the rotating brush 60 connected to transmit the rotational driving force of the turbine 72 is rotationally driven.

(The floor suction tool is lifted from the surface to be cleaned)
Next, the action and operation of each part in a state where the floor suction tool S is lifted from the surface to be cleaned will be described.
First, when the floor suction tool S is lifted from the surface to be cleaned, the suction port 41a is separated from the floor surface, and the air flow easily enters the suction port 41a, and the degree of vacuum inside the floor suction tool S is increased. However, it is lower than when cleaning the floor.
That is, the atmospheric pressure inside the floor suction tool S is close to the atmospheric pressure in the external space.

At this time, since the opening area of the introduction opening 71h of the drive unit 70 is formed smaller than the opening area of the suction port 41a, the airflow flowing into the floor surface suction tool S mainly flows from the suction port 41a. It will be. This is because the airflow has a property of being concentrated in a flow channel that easily flows when there are a plurality of flow channels.
In such a state, the airflow flowing into the inside of the floor suction tool S from the introduction opening 71h of the drive unit 70 is significantly reduced as compared to when the floor suction tool S is cleaning the floor surface. Accordingly, the amount of air passing through the turbine 72 is reduced, the rotation of the turbine 72 is stopped or the rotational force is greatly weakened, and the rotation of the rotary brush 60 is stopped or the rotational speed is greatly reduced.

As described above, by configuring each part and the air path F, when the floor suction tool S cleans the floor surface, the rotary brush 60 can be reliably driven to rotate, and the floor suction tool S When leaving the floor surface, the rotation of the rotary brush 60 can be stopped or the rotational force can be greatly reduced.
As a result, even when the vacuum cleaner is in operation, when the floor suction tool is lifted from the surface to be cleaned, the rotating brush can be stopped or the rotating force can be weakened, and the human body becomes the rotating brush. It is possible to provide a safe floor suction tool that is not easily caught even if it comes into contact, and a vacuum cleaner using the floor suction tool.

Next, referring to FIG. 25 to FIG. 26, as a modified example of the air passage F, an opening 42 h is formed at a position facing the dust collection air passage 45 of the upper case 42. This is a form in which an auxiliary air passage Fa through which the dust air passage 45 communicates directly is provided.
When the auxiliary air passage Fa is added in this way, in the state where the floor suction tool S is cleaning the surface to be cleaned, first, since the suction port 41a faces the floor surface, the suction port 41a The amount of inflow of airflow from the floor decreases, and the degree of vacuum inside the floor suction tool S increases. That is, the air pressure inside the floor suction tool S is lower than the external space.

Then, air flows as an air current from the introduction opening 71h of the drive unit 70 attached to the case 40 to the inside of the floor surface suction tool S where the atmospheric pressure is low, and flows down the air path F to connect the connection part. Flows in 50 directions.
At this time, the dust collection air passage 45 is a flow passage that collects the sucked air flow into one and flows it down, so that the air flow flows at high speed. That is, the atmospheric pressure is lower than other parts where the airflow inside the floor suction tool S flows (Bernoulli's law).

Thereby, since the auxiliary air passage Fa that directly communicates with the dust collection air passage 45 from the space K is provided, a part of the airflow that has branched from the air passage F passes through the opening 42h from the space K. Pulled down (Bernoulli's theorem). That is, by forming the auxiliary air passage Fa in addition to the air passage F, the airflow from the space K to the outside of the space K is improved.
Therefore, the flow of the airflow entering from the introduction opening 71h of the drive unit 70 is also improved, and the turbine 72 can be driven to rotate at a higher speed. Accordingly, the rotary brush 60 can be driven to rotate at a higher speed.

Further, when the surface to be cleaned has irregularities, when the floor suction tool S passes through the irregularities, the distance from the floor surface to the inlet 41a changes in a short time, so the amount of airflow sucked from the inlet 41a is Change in a short time. As a result, the air pressure inside the floor suction tool S also changes in a short time, and as a result, the rotational state (number of rotations / torque) of the turbine 72 greatly fluctuates in a short time, and the stability of the rotational state is lacking. There is.
However, since the auxiliary air passage Fa is formed, the air flow is always drawn into the space K from the dust collection air passage 45, so that the air flow flowing down to the predetermined amount of the drive unit 70 can be maintained. The change in the rotation state of the rotary brush 60 can be moderated.

  In addition, in the floor suction tool S in which the auxiliary air passage Fa is formed, the change in the rotation state of the rotary brush 60 becomes gentle compared with the floor suction tool S without the auxiliary air passage Fa. When the surface suction tool S leaves the floor surface, the rotation of the rotating brush 60 can be stopped or the rotational force can be greatly reduced.

  The floor suction tool S in which the opening 42h is formed at the position facing the dust collection wind path 45 of the upper case 42 in order to form the auxiliary wind path Fa has been described above. Due to differences in performance and specifications of the vacuum cleaner, it may be desired to use the floor suction tool S of a common form with different models beyond the presence or absence of the opening 42h and the difference in size.

In this case, referring to FIGS. 27 to 28, for the floor suction tool S in which the opening 42h is formed, a closing member 42s covering the opening 42h formed according to the performance and specifications is prepared, and according to the performance and specifications. It can be used by selectively attaching. In addition, the closing member 42a shown in the drawing completely closes the opening 42h.
Thus, by using the closing member 42s for each model with respect to the opening 42h, one form of the floor suction tool S can be used as a common part for a wide variety of models.

Next, a modified example of the floor suction tool S that prevents the rotation of the turbine 72 from being affected by the degree of vacuum inside the floor suction tool S will be described.
Referring to FIG. 29, the front edge 41g located in front of the suction port 41a opening in the lower case 41 is recessed by the front edge 41g so that the front of the case 40 communicates with the rotary brush storage chamber 40a. A notch 41h is formed.

The notch 41h is for introducing air from the outside of the floor suction tool S so that the degree of vacuum inside the rotating brush storage chamber 40a is appropriate even if the model has a large suction air volume. .
As a result, the rotation of the turbine 72 is properly maintained, and thus the rotating brush 60 can be appropriately rotated.

  Moreover, when the notch part 41h is unnecessary depending on the suction performance and specifications of the vacuum cleaner, or when it is desired to adjust the size of the notch part 41h, a closing member 41i prepared for each specification is provided in the notch part 41h. Accordingly, the notch 41h may be closed or the size may be adjusted.

Thus, by selectively using different closing members 41i for each model with respect to the notch 41h, one form of the floor suction tool S can be used as a common part for a wide variety of models.
In particular, if the closing member 41i is detachably configured, the floor suction tool S can be used in accordance with the main body owned by the user.

In addition, when the floor suction tool S is used in a state where the closing member 41i is attached to the notch 41h, the closing member 41i may be configured to be higher than the front edge 41g.
With this configuration, even when a vacuum cleaner with a small suction air volume is used, the degree of vacuum inside the rotating brush storage chamber 40a can be appropriately maintained, and dust of a certain size can be sucked. .

Next, the connection part 50 is demonstrated mainly with reference to FIGS.
The connection part 50 is composed of a suction cylinder 51 and a connection pipe 52. The suction cylinder 51 has one end (first end 51a) at a connection portion attachment port 41e formed at the rear center (rear longitudinal direction center) of the case 40, and back and forth with respect to the case 40 around the attachment position. It is pivotally connected.
The outer shape of the other end (second end 51b) of the suction tube 51 is formed in a cylindrical shape, and a flange portion along the outer periphery of the suction tube 51 at a position spaced from the second end 51b by a predetermined distance. 51c is formed.

The diameter of the second flange is smaller than that of the first flange, and the second flange is located closer to the end side of the suction cylinder 51 than the position where the first flange is formed.
An annular groove 51d is formed between the flange 51c and the edge of the second end 51b along the outer periphery of the suction cylinder 51.

Next, the connection pipe 52 is a tube having a cylindrical space inside, a connection pipe connection portion 52a for connecting to the extension pipe 30 and the hose 20 at one end, and a connection pipe connection at the other end. A connecting pipe connecting portion 52b is formed for connecting to the suction cylinder 51 which is inclined and opened with respect to the central axis of the portion 52a.
The connecting pipe connecting portion 52b is formed in a cylindrical shape, and the diameter of the opening of the connecting pipe connecting portion 52b is larger than the diameter of the second end 51b of the suction cylinder 51 and smaller than the diameter of the flange 51c. Has been. And two through-holes are opened in the outer peripheral surface of the connection pipe connection part 52b.
The through hole 52c formed on the upper surface of the connecting pipe connecting portion 52b is covered with a cover that is attached to the connecting pipe 52 by screws 53a or the like.

The suction cylinder 51 and the connecting pipe 52 configured as described above are connected as follows.
First, the 2nd end 51b of the suction pipe | tube 51 is inserted in the connection pipe connection part 52b with the opening of the connection pipe 52. FIG. That is, the suction cylinder 51 and the connection pipe 52 are connected to the front-rear positional relationship.
At this time, since the diameter of the suction cylinder 51 on the second end 51b side is smaller than the opening diameter of the connection pipe connecting portion 52b, the suction pipe 51 enters the inside of the connection pipe 52 and between the connection pipe 52 and the suction cylinder 51. Further, there is a clearance that allows the connection tube 52 to rotate about the coupling position with respect to the suction tube 51 (that is, the connection tube 52 can move to the left and right with respect to the suction tube 51).
The clearance referred to in the present application includes a state in which a gap is opened between the two members and a contact state in which the connection tube 52 is rotatable with respect to the suction tube 41.

Moreover, since the diameter of the flange 51c is larger than the opening diameter of the connection pipe connection part 52b, the end of the connection pipe connection part 52b of the connection pipe 52 contacts the flange 51c.
In this state, an annular groove formed on the other end side of the suction cylinder 51 by inserting a retaining member 54 that reaches the inside of the groove 51d into the through hole 52 that opens to the outer peripheral surface of the connection pipe coupling portion 52b. This retaining member 54 enters 51d and prevents the suction tube 51 from coming off from the connecting pipe connecting portion 52b.
Therefore, by connecting the respective parts as described above, the connecting pipe 52 is rotatably connected to the suction cylinder 51 without dropping off.

Next, mainly referring to FIGS. 12 to 13, the connection state of the connecting pipe 52 and the suction cylinder 51 in the state of the floor suction tool with respect to the surface to be cleaned G and the state of the floor suction tool will be described.
(1) The state where the surface to be cleaned is being cleaned (the state where the floor suction tool is on the surface to be cleaned G)
When the surface to be cleaned G is cleaned with the floor suction tool 40, the surface to be cleaned G supports the weight of the floor surface suction tool 40. In this state, the user grasps the grip part of the hand operating part 21 connected to the extension pipe 30 connected to the connection part 52 and moves the floor suction tool 40 back and forth on the surface G to be cleaned. I do.

At this time, since the suction cylinder 51 is attached to the case 40 so as to be able to rotate back and forth around the attachment position, the floor surface suction tool located on the surface to be cleaned when the user moves back and forth. The case side of 40, the connection part 50, and the extension pipe side to which this connection part 50 is attached can operate smoothly.
That is, by moving the floor suction tool 40 back and forth, the suction cylinder 51 rotates with respect to the case, and the angle formed between the extension pipe and the surface to be cleaned G (case 40) is changed. The tool 40 can be operated without leaving the surface to be cleaned G.

Next, the connection position state of the suction cylinder 51 and the connection pipe 52 will be described.
As described above, when the floor suction tool 40 is moved back and forth on the surface to be cleaned G, a force in the front-rear direction mainly acts on the connection position between the suction cylinder 51 and the connection pipe 52.
That is, the inner peripheral surface 52s of the connecting pipe connecting portion 52b of the connecting pipe 52 and the outer peripheral face 51s on the second end 51d side of the suction cylinder 51 do not come into strong contact with each other in the vertical direction. On the other hand, it is possible to maintain a rotatable clearance C.
Therefore, when the floor suction tool 40 is on the surface to be cleaned G, the connection pipe 52 can be rotated left and right with respect to the suction cylinder 51 (a surface perpendicular to the mounting direction can be rotated). Be

(2) The state in which the floor suction tool 40 has the connection part 50 side and is lifted from the surface to be cleaned G Next, the floor suction tool 40 has the connection part 50 side and lifts the surface to be cleaned G from the surface to be cleaned The state that was made will be described.
First, due to its own weight, the case 40 acts on the suction cylinder 51 to tilt forward with the case 40 attached to the suction cylinder 51 as a center. Along with this, the suction cylinder 51 and the connecting pipe 52 are subjected to a force that causes the suction cylinder 51 to tilt forward with respect to the connecting pipe 52 due to the above-described force.

At this time, since the connection pipe 52 is connected to the suction cylinder 51 with a clearance at the connecting position of both members so as to be rotatable, the suction cylinder is formed in the connection pipe connecting portion 52b by the above-described action. 51 tilts forward.
The inner peripheral surface 52s of the connecting pipe connecting portion 52b and the outer peripheral surface 51s of the suction cylinder 51, the inner wall of the groove 51d and the retaining member 54, and the end 52a of the connecting pipe 52 and the end 51t of the suction pipe 51 are respectively connected to each other. The contact is made while pressing the surface of.
Thereby, contact resistance arises between 51s of outer peripheral surfaces of the suction cylinder 51, and 52s of inner peripheral surfaces of the connection part 52, and rotation of the suction cylinder 51 with respect to the connection pipe 52 can be suppressed.

Therefore, the drive part of the rotating brush is provided on the side of the floor suction tool, and the floor suction tool with an unbalanced weight balance between the left and right is lifted from the surface to be cleaned with the extension pipe connected to the connection part. In addition, due to the above-described action, the rotation of the suction cylinder 51 with respect to the connection pipe 52 can be suppressed, and the inclination of the floor surface suction tool can be suppressed.
Thus, when the floor suction tool is lifted, the floor suction tool is unlikely to be inclined to the right side or the left side (the side where the driving unit of the rotating brush is located), and when the suction tool is grounded to the cleaning surface, Since the suction tool does not contact the cleaning surface in an oblique state, it is possible to prevent a strong impact from being applied to the cleaning surface and the suction tool.

Vacuum cleaner C, vacuum cleaner body 10, hose 20, hand control unit 21, extension tube 30
Floor suction tool S, case 40, lower case 41, suction port 41a, upper case 42
Front opening 42a, upper cover 46, hair remover 43, ring 43a, nail 43b
Dust collection air duct 45, connection part 50, rotating brush 60, drive part 70, case 71
Introduction port 71a, exhaust port 71b, turbine 72, drive side mounting guide 73,

Claims (4)

In a floor suction tool having a case that forms an outer shell, a rotating brush that is rotatably provided inside the case, and a drive unit that rotationally drives the rotating brush,
The drive unit has a drive unit case that forms a separate body from the case, a drive force generation unit, and a drive force transmission unit that transmits the drive force from the drive force generation unit to the rotary brush, The driving part case is provided with the driving force generating means and the driving force transmitting means,
A floor surface suction tool characterized in that by attaching the driving unit to the case, a precursor driving force transmission means is connected to the rotating brush, and the rotating brush can be driven to rotate.   The floor suction tool according to claim 1, wherein the driving unit is configured to be detachable from the case.   The floor surface suction tool according to claim 1, wherein the driving force generating means uses a turbine that rotates by a flow of airflow.   A vacuum cleaner using the floor suction tool according to claim 1.

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