WO2011158596A1

WO2011158596A1 - Floor surface suction tool and electric vacuum cleaner using the floor surface suction tool

Info

Publication number: WO2011158596A1
Application number: PCT/JP2011/061433
Authority: WO
Inventors: 光宏岡▲崎▼; 公義相馬; 守郡司; 賢治田中
Original assignee: 三菱電機株式会社; 三菱電機ホーム機器株式会社
Priority date: 2010-06-18
Filing date: 2011-05-18
Publication date: 2011-12-22
Also published as: CN102843944A; TW201200090A; JPWO2011158596A1; CN102843944B; TWI454241B; JP5429374B2

Abstract

In a floor surface cleaning tool comprising a rotary brush, if the rotary brush is inclined with respect to the attachment direction of the rotary brush, there is the problem that rotation of the rotary brush is inhibited. Therefore, a floor surface suction tool used in an electric vacuum cleaner comprises a case forming an outer shell, a rotary brush provided so as to be freely rotatable in an interior portion of the case, a drive unit provided in the case for driving the rotation of the rotary brush, and a drive unit side mounting guide to which a driving force is conveyed from the drive unit and which connects to the rotary brush; wherein the rotary brush and the drive unit side mounting guide are connected in a universal joint structure.

Description

Floor suction tool and vacuum cleaner using this floor suction tool

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

Conventionally, a rotating brush for removing dust by coming into contact with a cleaning surface provided on a floor suction tool used for a vacuum cleaner is configured to be removable from the floor suction tool, and the maintenance of the rotating brush is enhanced (See, for example, Patent Document 1).
Such a floor suction device has a drive unit for rotationally driving the rotary brush, and a pulley connected to the drive unit by a belt. Then, the shaft of one end of the rotating brush engages with the bearing engagement recess formed in the pulley, and the other end is held by the bearing holding portion formed in the floor surface suction tool, so that the rotating brush is the drive unit Is rotatably held by the floor suction device in a state in which the driving force from the vehicle can be transmitted.

Japanese Utility Model Publication 61-160841

However, in order to efficiently transmit the driving force from the drive unit to the rotary brush, the outer shape of the shaft of the rotary brush that is locked to the pulley connected to the drive unit is a bearing locking recess formed on the pulley It has a shape that matches the shape of
Therefore, the rotating brush is against the bearing engagement recess, for example, when manufacturing errors of parts constituting the floor suction tool, when mounting the rotating brush, or when the rotating brush passes over the convex portion of the floor during cleaning. When it becomes oblique (when the rotating brush is inclined with respect to the mounting direction of the rotating brush), there is a problem that there is a possibility that the rotation of the rotating brush may be inhibited.

Therefore, the present invention solves the above-mentioned problems, and a floor suction tool in which the rotating brush is rotationally driven stably regardless of the mounting state of the rotating brush on the floor suction tool main body and the load received at the time of use. Intended to be provided.

In order to solve the above problems, an outer case, a rotating brush rotatably provided inside the case, a driving unit for rotationally driving the rotating brush provided in the case, and a drive from the driving unit It is sufficient to have a drive side mounting guide for transmitting the force and connecting with the rotary brush, and the rotary brush and the drive side mounting guide may be connected by a universal joint structure.

According to the present invention, the rotating brush bears the bearing lock, for example, when manufacturing errors of parts constituting the floor suction tool, when mounting the rotating brush, when the rotating brush passes over the convex portion of the floor during cleaning, etc. Even when attached obliquely to the recess, it is possible to reliably transmit the rotational drive force from the drive side mounting guide to the rotary brush.

The whole external view of the vacuum cleaner using the floor suction tool concerning the present invention The perspective view which looked at the floor surface suction tool S from the front. The exploded perspective view of FIG. 2 The perspective view which looked at floor surface suction tool S from the back The perspective view which looked at floor surface suction tool S from the lower part 5 is a perspective view showing the process of attaching and detaching the rotating brush. Top view of floor suction tool seen from above The top view which shows the state which removed the upper cover 46 in FIG. In FIG. 7, a cross-sectional view taken parallel to the lower surface of the case 40 and cut through the center of the rotating brush Top view seen from the lower case side of floor suction tool S Side view of the drive unit side of the floor suction tool S DD cross section of FIG. 7 In the DD cross section of FIG. 7, the cross-sectional schematic which shows the state of a suction pipe and a connecting pipe (a) The floor surface suction tool S is on the to-be-cleaned surface (b) The floor surface suction tool S is a cleaned surface Lifted from Sectional view of the rotating brush 60 cut at a plane passing through the shaft 60g An exploded perspective view of the rotating brush 60 A cross-sectional view of the AA cross section of FIG. 7 as viewed from the front (the rotating brush 60 is detached) In FIG. 16, a cross sectional view showing a process of attaching and detaching a brush The perspective view which shows the combined state of the rotating brush 60 and the dust removal tool 43 A cross-sectional view of the AA cross section of FIG. 7 as viewed from the front (a state in which the rotating brush is mounted) A plan view showing a connection state of each pulley of the drive unit 70 The perspective view which saw the drive part 70 from the attachment side to the floor surface suction tool S BB sectional view of FIG. 21 CC sectional view of FIG. 7

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

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

Next, the floor suction device S will be described mainly with reference to FIGS. 2 to 13.
The floor suction tool S includes an outer case 40, an upper cover 46 provided at a predetermined distance on the upper surface of the case 40 (upper surface of the upper case 42), and an extension pipe 30 received at the center of the rear of the case 40. , Etc., the rotary brush 60 for scraping out the dust adhering to the surface G to be cleaned and improving the dust collection performance, and the drive unit 70 which is a power device for obtaining the rotational driving force of the rotary brush 60 It consists of
In addition, although there also exists a thing which rotationally drives the rotating brush 60 using an electric motor about the drive part 70, in this Embodiment, the turbine which utilizes the airflow which generate | occur | produces with the suction | attraction force of the electric blower comprised by the cleaner body 10 is used. It explains with what was used.

Hereinafter, each part of the floor suction device S will be described in detail.
The case 40 includes a substantially box-shaped lower case 41 forming an outer lower side of the floor suction tool S and an approximately box-shaped upper case 42 forming an outer upper side, and the lower case 41 and the upper case 42 are vertically combined. Is configured by.

The bottom plate of the lower case 41, which is 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. Between the suction port 41a and the upper case 42, a rotating brush storage chamber 40a in which the rotating brush 60 is stored is formed by securing a predetermined space.
In the rear of the rotary brush storage chamber 40a, a dust collection air passage 45 communicating with a connection portion 50 described later is formed, so that dust sucked from the suction port 41a flows down to the connection portion 50. Is configured.

At the rear center of the case 40, a connection portion attachment port 40e, which is an opening to which the connection portion 50 is attached, is formed.
The connection portion mounting port 40e forms a notch at the center of the rear of the lower case 41 and the upper case 42, and these notch are aligned when the lower case 41 and the upper case 42 are vertically aligned. Forms an opening.

Next, on one side wall of the case 40, a substantially circular drive portion mounting opening for inserting the drive side mounting guide 73 of the drive portion 70 fitted to one end of the rotary brush 60 described later into the inside of the case 40 40b is formed.
The drive portion mounting opening 40b forms semicircular notches at the end of the side walls of the lower case 41 and the upper case 42, respectively, and these cutouts are formed when the lower case 41 and the upper case 42 are vertically joined. A circular opening is formed by combining the notches.

Next, a rotary brush 60, which will be described later, is inserted into the rotary brush storage chamber 40a on the other side wall of the case 40, and it has a substantially circular shape at a position where the fixed side mounting guide 60e of the rotary brush 60 is engaged. The rotary brush mounting opening 40c in which the concave shape is formed is open.
The rotary brush mounting opening 40c forms notches on the side walls of the lower case 41 and the upper case 42, each having a semicircular shape and a concave shape, and the lower case 41 and the upper case 42 are vertically aligned. At the time, these notches are formed by putting together.

Next, on the end side of the rotary brush storage chamber 40a on the rotary brush mounting opening 40c side and at a position not overlapping with the suction port 41a, dust having a ring shape for removing hair and the like attached to the rotary brush 60 A dust remover storage chamber 44 is formed for storing the remover 43 rotatably in the circumferential direction of the ring shape.
The dust remover 43 has a ring portion 43a and a claw portion 43b erected from the ring portion 43a. The number of claws 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 43b is erected is directed to the drive portion mounting opening 40b in a state where the ring portion 43a is attached to the dust remover storage chamber 44.

Next, the dust remover storage chamber 44 has three

ribs

41b, 41c, and 41d, each having a semicircular notch formed upright from the lower case 41, and a semicircle erected from the upper case 42. When the lower case 41 and the upper case 42 are vertically aligned, the three

ribs

42b, 42c and 42d in which the notches are respectively formed are formed by vertically connecting these notches.
The lower side (lower case 41 side) of the rotary brush storage chamber 40a is opened to the extent that the dust remover 43 does not come off in order to secure the rotational space of the dust remover 43.

The semicircular notches formed in the

ribs

41b, 41d, 42b and 42d located on the rotary brush storage chamber 40a side and the rotary brush mounting opening 40c side have the outer diameter of the ring portion 43a of the dust remover 43. Less than. The semicircular notches of the ribs 41c and 42c located at the centers of these ribs are formed to be larger than the outer diameter of the ring portion 43a.
Therefore, the dust remover storage chamber 44 is formed at the position sandwiched by the left and right on the ribs located on the rotary brush storage chamber 40a side and the rotary brush mounting opening 40c side, and the dust is determined by the above-mentioned size relationship. 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 parallel to the traveling direction of the floor suction tool S in use.
That is, the dust remover storage chamber 44 holds the dust remover 43 in parallel with the traveling direction of the floor suction tool S in use.
The centers of the rotary brush mounting opening 40c, the dust removing tool storage room 44, the dust removing tool 43 held in the dust removing tool storage room 44, and the drive part mounting opening 40b are floor suctions in a substantially coaxial direction. They are lined up inside the fixture S.

Here, the rotating brush 60 attached to the case 40 will be described mainly with reference to FIG. 14 to FIG.
The rotary brush 60 has a plurality of spiral grooves 60b formed on the outer periphery of the main body shaft 60a in which a rod-like shaft 60g serving as a rotation shaft of the rotary brush 60 is inserted. The brush 60 c is provided spirally in the outward direction of the rotary brush 60.
In the figure, although the brush 60c used the strip-like thing comprised with the resin with a softness | flexibility etc., the hair-like thing extended toward the outer direction of the rotating brush 60 may be sufficient.

A recess 60d is formed at one end of the main shaft 60a, into which a drive side mounting guide 73 of the drive unit 70 described later is fitted and engaged. The recess 60d is formed with a groove 60j which is parallel to the shaft 60g.
The groove 60j is engaged by the power transmission rib 73a formed on the drive side mounting guide 73 described later from entering in the axial direction of the shaft 60g, and the free rotation of the recess 60d with respect to the rotation of the drive side mounting guide 73 It is a detent structure for preventing.
In order to prevent the shaft 60g from coming out of the main body shaft 60a, a stopper 60w is provided on the tip end side of the shaft 60g on the recessed portion 60d side.

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

In addition, between the fixed side mounting guide receiving portion 60h and the bearing 60r, two ring-shaped lubricating plates 60k are provided through the shaft 60g in the ring opening. The lubricating plate 60k reduces contact resistance between the fixed side mounting guide 60e fixed to the case 40 and the fixed side mounting guide receiving portion 60h which rotates with the main shaft 60a when the rotary brush 60 rotates, thereby efficiently It is for rotating the main body shaft 60a.
Further, in order to prevent the fixed side mounting guide 60e from coming off the shaft 60g, a stopper 60m is provided on the tip end side of the shaft 60g penetrating the fixed side mounting guide 60e as viewed from the fixed side mounting guide 60e.

The retainer 60m is attached to the shaft 60g such that a clearance is formed between the fixed side mounting guide 60e and the shaft 60g of the fixed side mounting guide receiving portion 60h in the axial direction (left and right direction in the drawing). With this configuration, even if the size of the case 40 or the rotating brush 60 varies due to a manufacturing error or the like, it is possible to assemble the respective parts, and the rotating brush 60 can be rotated smoothly. ing.
In addition, by interposing an elastic body (for example, a spring, a wave washer) in the clearance formed as described above, the above effect can be obtained, and the intrusion of dust such as lint and hair inside the clearance can be prevented. Can.

Next, a cover 60n is fixed by press-fitting to the fixed side mounting guide 60e so as to cover the retaining 60m.
A through hole 60t which is an opening is formed in the cover 60n. By forming the through holes 60t, after the rotary brush 60 is washed with water, the water entering the gap between the cover 60n and the fixed side mounting guide 60e can be discharged to the outside, and the heat generated by 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, when using the floor suction tool S, it is possible to form an air flow from the through hole 60t to the brush chamber. It is possible to promote the cooling of the bearing 60r.
In addition, by forming the 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 S is alleviated, or the raised portion 60v is formed into a curved surface. It can reduce the catch with the wall etc.

Next, the fixed side mounting guide 60e is formed with a convex portion 60f which is rotatable along with the fixed side mounting guide 60e and which protrudes in the circumferential direction.
When the fixed side mounting guide 60e is mounted to the rotary brush mounting opening 40c, the convex portion 60f is inserted from the concave portion of the rotary brush mounting opening 40c and the locking piece 60s is rotated with respect to the fixed side mounting guide 60e. As a result, the recessed portion and the left and right positions of the locking pieces 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 rotary brush mounting opening 40c so as not to come off.
In addition, since the fixed side mounting guide 60e is rotatably provided with respect to the main body shaft 60a, even if the fixed side mounting guide 60e is fixed to the rotary brush mounting opening 40c, the main body shaft 60a is the rotary brush storage chamber 40a. Is rotatably stored in the

Next, with reference mainly to FIGS. 20 to 23, the drive unit 70 for generating the rotational drive force of the rotary brush 60 will be described.
The driving unit 70 is mounted on a turbine case 71 forming an outer shell, a turbine 72 rotated by an air flow provided inside the turbine case 71, and a driving side mounted on one end of the rotating brush 60 to transmit the rotational driving force of the turbine 72 From the floor surface suction tool S when the guide 73, the belt 74 which is a driving force transmission means for transmitting the rotational driving force of the turbine to the drive side mounting guide 73, and the drive unit 70 attached to the floor surface suction tool S It comprises the latching | locking part 75 for preventing drop-off | omission of these.

The turbine case 71 is formed at one side with an inlet 71a for introducing an air flow for rotating the turbine 72, and at the other side, the air flow passing through the turbine 72 is exhausted to the outside A mouth 71 b and a guide opening 71 c from which the drive side mounting guide 73 protrudes from the inside of the turbine case 71 are formed. The exhaust port 71b is open at the end of a cylindrical portion 71d of the turbine case 71 formed in a cylindrical shape.
In the internal space of the turbine case 71, the turbine 72 is rotatably supported between the inlet 71a and the exhaust port 71b. A turbine pulley 72 a is coaxially attached to the turbine 72.

Next, the drive side mounting guide 73 is formed with a substantially cylindrical base 73 b and power transmission ribs 73 a at intervals of 90 degrees based on the rotation center of the base 73 b. The power transmission rib 73a has an arc shape (or an arc shape) when viewed from the direction perpendicular to the axial direction of the shaft 60g when the components are assembled, and the power transmission rib 73a is mounted on the shaft 60g when the components are assembled. It projects radially from the base 73b so as to be parallel to it.
The drive side mounting guide 73 is coaxially provided with a guide pulley 73c.

The drive side mounting guide 73 is rotatably supported by the guide opening 71c 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 in the turbine case 71. The pulley 76 is for converting the rotational driving force generated by the turbine 72 into an appropriate rotational speed and torque and transmitting it to the drive side mounting guide 73.

The rotational drive force of the turbine 72 can be transmitted to the drive-side mounting guide 73 by connecting the turbine pulley 72a and the pulley 76, and the pulley 76 and the guide pulley 73c with the

belts

74a and 74b, respectively.
As in the present embodiment, by interposing a pulley for reduction between the turbine pulley 72a and the guide pulley 73c, the rotational driving force transmitted to the drive side mounting guide 73 is adjusted. However, the turbine pulley 72a and the guide pulley 73c may be directly connected by a belt.

The drive part 70 comprised as mentioned above is attached to the floor surface suction tool S as follows.
Referring mainly to FIGS. 19 and 23, first, the cylindrical portion 71d of the turbine case 71 is inserted into the communication opening 46a formed by the upper case 42 and the upper cover 46, and the drive portion mounting opening 40b is formed. The drive side mounting guide 73 provided on the turbine case 71 is inserted.
Then, the locking portion 75 provided in the drive portion 70 locks to the engagement opening 46 b of the floor surface suction tool S, whereby the drive portion 70 is securely attached to the floor surface suction tool S.
As described above, in the floor surface suction tool S, the drive unit 70 is provided at one side of the floor surface suction tool S, that is, at a position shifted from the center in the longitudinal direction (left and right direction). With respect to the other side, the weight is increased, and the left and right weight balance is biased.

As described above, when the drive unit 70 is attached to the floor suction tool S, the rotary brush storage chamber 40a, the air passage F, the inlet 71a of the drive unit, and the exhaust port 71b communicate with each other. Also, the suction force generated by the electric blower is generated, whereby an air flow capable of rotating the turbine 72 can be obtained.
That is, the air flow introduced from the inlet 71a is rotationally driven by the suction force generated by the electric blower, and the turbine 70 is rotationally driven to be discharged from the exhaust port 71b. The discharged air is formed by the upper case 42 and the upper cover 46 After flowing down the air passage F, the air flows from the front opening of the upper case 42 into the rotary brush storage chamber 40a, and flows down to the connection portion 50 through the dust collection air passage together with the air flow introduced from the suction port 41a.

Next, attachment and detachment of the rotating brush 60 from the inside of the case 40 will be described.
(1) Mounting of the rotary brush 60 First, the rotary brush 60 is inserted into the rotary brush mounting opening 40c from the end on which the recess 60d is formed.
At this time, the rotary brush 60 is inserted into the internal opening of the ring portion 43a of the dust remover 43, and the claw portions 43b of the ring portion 43a are respectively fitted into the plurality of grooves 60b of the rotary brush 60 The portion 43b is guided by the groove 60b).
When the rotating brush 60 is inserted into the ring portion 43a, the brush 60c bends and passes through the inside of the ring portion 43a and advances in the direction of the drive-side mounting guide 73.

Then, when the rotary brush 60 is further inserted toward the drive side mounting guide 73, the claw portion 43b contacts the rotary brush 60, and the insertion operation of the rotary brush 60 follows the groove 60b formed in a spiral shape. It rotates inside the dust removal tool storage room 44 without going against it.
The claw portion 43b is formed with its tip facing in the direction (inward of the case 40) in which the drive portion mounting opening 40b is positioned, so when mounting the rotary brush 60 in the rotary brush storage chamber 40a It does not become resistance.

Next, the rotary brush 60 is inserted to the position of the drive side mounting guide 73 of the drive unit 70, whereby the drive side mounting guide 73 is fitted into the recess 60d. At this time, the power transmission rib 73a enters the groove 60j in the axial direction, and is held in the rotational drive direction of the drive side mounting guide 73 in the groove 60j, thereby preventing idle rotation in the recess 60d of the drive side mounting guide 73. . In addition, when the power transmission rib 73a enters the groove 60j from the axial direction, the power transmission rib 73a has an arc shape, so that 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 drive side mounting guide 73 is fitted into the concave portion 60d, the convex portion 60f of the fixed side mounting guide 60e is inserted from the concave portion of the rotary brush mounting opening 40c to rotate the fixed side mounting guide 60e. Thus, the fixed side mounting guide 60e is fixed to the rotary brush mounting opening 40c and can not be pulled out, so that the rotary brush 60 can be prevented from falling off the case 40.
The rotating brush 60 is now correctly attached to the rotating brush storage chamber 40a.

In the state where the rotary brush 60 is attached to the rotary brush storage chamber 40 a, the claw portion 43 b is held in a state following the groove 60 b of the rotary brush 60 and is rotationally driven together with the rotary brush 60. As described above, when the claw portion 43b is held following the groove 60b, when the rotary brush 60 is removed from the floor suction tool S, it is not necessary to align the positions of the claw portion 43b and the groove 60b.

(2) Removal of the rotary brush 60 First, the fixed side mounting guide 60e is rotated to align the concave shape of the rotary brush mounting opening 40c, and the fixing of the rotary brush mounting opening 40c and the fixed side mounting guide 60e is released. By pulling the fixed side mounting guide 60e, the rotary brush 60 can be pulled out from the rotary brush mounting opening 40c.
When the rotary brush 60 starts to be pulled out of the floor suction tool S, the claw portion 43b follows the groove 60b formed in a spiral shape, and against the pulling out operation of the rotary brush 60, inside the dust removal tool storage chamber 44. Rotate.

At this time, the claw portion 43b follows the groove 60b, thereby removing dust such as hair or lint entwined around the rotating brush 60 from the shaft or the brush. Then, when the rotating brush 60 passes through the ring portion 43 a of the dust removing device 43, dust is scraped 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 configured to be easily removable.
Further, since the outer shape of the power transmission rib 73a is circular (bowed), power transmission to the inner wall surface of the groove 60j (inner wall surface of the recess 60d) even if the rotary brush 60 is inclined with respect to the drive side mounting guide 73 The ribs 73a do not contact in the radial direction (there is no strong contact). 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 in an inclined state.
That is, the engagement between the power transmission rib 73a and the groove 60j is configured as a universal joint structure (universal joint).

As a result, when the rotation brush 60 is attached obliquely to the bearing engagement recess due to a manufacturing error of the size of each part constituting the floor surface suction tool S or a defect when attaching the rotation brush 60, etc. Even when the rotary brush 60 is inclined with respect to the drive side mounting guide 73 when the rotary brush 60 rides over the convex portion of the floor surface at this time, the power transmission rib 73a and the groove 60j are for driving force transmission. The rotational drive force from the drive side mounting guide 73 can be reliably transmitted to the rotary brush 60 because the rotational direction is engaged without inhibiting the rotation.

In addition, the dust attached to the rotating brush 60 can be taken while removing the rotating brush 60 from the case 40. In particular, if the suction port of the floor surface suction tool S is directed upward and the rotary brush 60 is removed, dust taken from the rotary brush 60 falls into the floor surface suction tool S, so that the operator's hand can And does not contaminate the surroundings.

In addition, since the dust remover 43 rotates following the shape of the groove 60b when attaching and removing the rotary brush 60, the resistance when the rotary brush 60 is attached and removed due to the dust remover 43 is minimized. It is possible to
Furthermore, since the dust remover 43 rotates following the shape of the groove 60b, the shape of the groove 60b is not limited to the linear shape, and the shape of the groove 60b can be configured by a curve such as a spiral shape.
Further, at a position away from the shaft 60g of the fixed side mounting guide 60e, a radially projecting knob portion 60u is formed. As a result, even if hair, lint, etc. are wound around the fixed side mounting guide 60e, it becomes possible to carry out the removing operation of the fixed side mounting guide 60e with less force.

As mentioned above, although attachment or detachment of the rotating brush 60 was demonstrated, in order to demonstrate intelligibly the relationship between the dust removal tool 43 and the brush 60c in FIG. 18, the brush 60c is abbreviate | omitted about the part which the brush 60c and the dust removal tool 43 overlap. Expressed.
According to the actual form, when the rotary brush 60 moves in the dust remover 43, the brush 60c passes through the inside of the ring portion 43a in a bent state.

Next, on the lower case 41 in front of and behind the rotating brush storage chamber 40a, a traveling roller 41r on the front side for improving the operability of the floor suction device S is rotatably provided.
Further, the screw boss receiver 40 d on the front side used for assembling the lower case 41 and the upper case 42 is an outer side of the traveling roller provided on the front side of the lower case 41 so as not to block the air flow in the rotating brush storage chamber 40 a. That is, it is disposed outside the rotating brush storage chamber 40a.

Next, mainly with reference to FIG. 8 and FIG. 19, the air path F of the air flow exhausted from the drive unit by rotating a turbine 72 provided in the drive unit 70 described later will be described.
The upper case 42 is provided with an upper cover 46 covering 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 a space K surrounded by the upper case 42 and the upper cover 46 communicates with the rotary brush storage chamber 40a.

Further, a communication opening 46a communicating with the exhaust air passage of the drive unit 70 is formed at the rear side of the side where the drive unit mounting opening 40b of the upper case 42 is formed, by combining the upper case 42 and the upper cover. ing.
By configuring each part as described above, the space K sandwiched between the upper case 42 and the upper cover, the communication opening 46a, and the air passage F for flowing the exhaust from the drive unit 70 by the front opening 42a are configured. Be done.
In addition to this, 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 S.

Next, the connection unit 50 will be described mainly with reference to FIGS. 11 to 12.
The connection portion 50 is configured of a suction cylinder 51 and a connection pipe 52. The suction cylinder 51 has one end (first end 51a) at the connection portion attachment port 41e formed at the rear center (rear center in the rear longitudinal direction) of the case 40, with respect to the case 40 front and rear It is connected rotatably. The outer shape of the other end (second end 51b) of the suction cylinder 51 is formed in a cylindrical shape, and a flange portion along the outer periphery of the suction cylinder 51 at a position spaced apart from the second end 51b by a predetermined distance 51c is formed.

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

Next, the connecting pipe 52 is a tubular having a cylindrical space inside, a connecting pipe connecting portion 52a for connecting to the extension pipe 30 or the hose 20 at one end, and a connecting pipe connecting to the other end A connecting pipe connecting portion 52b is formed to connect with the suction cylinder 51 opened with an inclination 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 portion 51c. It is done. Then, two through holes are opened in the outer peripheral surface of the connection pipe connecting portion 52b.
The through hole 52c formed on the upper surface of the connection pipe connection portion 52b is covered with a cover attached to the connection pipe 52 with a screw 53a or the like at the upper side.

The suction cylinder 51 and the connection pipe 52 which were comprised as mentioned above are connected as follows.
First, the second end 51 b of the suction cylinder 51 is inserted into the connection pipe connection portion 52 b where the connection pipe 52 has an opening. That is, the suction cylinder 51 and the connection pipe 52 are connected in a front-rear positional relationship.
At this time, the diameter of the suction cylinder 51 on the second end 51 b side is smaller than the diameter of the opening of the connection pipe connection portion 52 b, and therefore, it enters into the connection pipe 52 and between the connection pipe 52 and the suction cylinder 51. A clearance is interposed between the suction pipe 51 and the connecting pipe 52 so that the connecting pipe 52 can rotate around the connection position (that is, the connecting pipe 52 can move to the left and right with respect to the suction pipe 51).
Note that the clearance referred to in the present application includes that a gap is open between both members, and a contact state in which the connecting pipe 52 can rotate with respect to the suction cylinder 51.

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

Next, mainly referring to FIG. 12 to FIG. 13, the connection state of the connection pipe 52 and the suction cylinder 51 in the state of the floor suction tool S with respect to the surface G to be cleaned and the state of the floor suction tool S will be described. .
(1) State where the surface to be cleaned G is being cleaned (the floor suction tool S is on the surface to be cleaned G)
When the surface to be cleaned G is cleaned with the floor suction tool S, the weight of the floor surface suction tool S is supported by the surface to be cleaned G. In this state, the user holds the grip portion 21 of the hand operation portion 21a connected to the extension pipe 30 or the like connected to the connection pipe 52, and moves the floor suction tool S back and forth on the surface G to be cleaned. Clean up.

At this time, since the suction cylinder 51 is mounted rotatably to the front and rear centering on the mounting position with respect to the case 40, the floor suction tool positioned on the surface to be cleaned when the user moves it back and forth The case 40 side of S, the connecting portion 50 and the extension pipe side attached with the connecting portion 50 can operate smoothly.
That is, by moving the floor surface suction tool S back and forth, the suction cylinder 51 rotates with respect to the case to change the angle between the extension pipe 30 and the surface to be cleaned G (case 40), and the floor surface The suction tool S can be operated without being separated from the surface G to be cleaned.

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 S is moved back and forth on the surface G to be cleaned, a force in the front-rear direction mainly acts on the connection position of the suction cylinder 51 and the connection pipe 52.
That is, since the inner peripheral surface of the connection pipe connecting portion 52b of the connection pipe 52 and the outer peripheral surface 51s on the second end 51b side of the suction cylinder 51 do not contact each other strongly, the connection pipe 52 It is possible to maintain the rotatable clearance C against.
Therefore, when the floor suction tool S is on the surface G to be cleaned, the connecting pipe 52 can be turned to the left and right with respect to the suction cylinder 51 (a surface perpendicular to the mounting direction can be rotated). Be

(2) The floor suction tool S holds the connection section 50 side and is lifted from the surface G to be cleaned Next, the floor suction tool S holds the connection section 50 side and lifts the surface G to be cleaned Explain the situation that has been
First, due to its own weight, a force acts on the suction cylinder 51 to tilt the case 40 forward about the mounting position of the case 40 of the suction cylinder 51. The above-described force acts on the connecting pipe 52 so that the suction cylinder 51 tilts forward.

At this time, the connection pipe 52 is connected to the suction cylinder 51 by providing a clearance at the connection position of both members so as to be rotatable, so that the suction cylinder can be connected to the connection pipe connection portion 52b by the above-described operation. 51 leans forward.
The inner circumferential surface 52s of the connection 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 connection pipe 52 and the end 51t of the suction cylinder 51 are mutually different. Contact while pressing the face of.
As a result, a contact resistance occurs between the outer peripheral surface 51s of the suction cylinder 51 and the inner peripheral surface 52s of the connection tube 52, so that the rotation of the suction cylinder 51 with respect to the connection tube 52 can be suppressed.

Therefore, the drive unit 70 of the rotating brush 60 is provided on the side of the floor suction tool S, and the floor suction tool S having an unbalanced weight balance between the left and right is connected with the extension pipe 30 connected to the connection section 52 Even when the cleaning surface G is lifted, the rotation of the suction cylinder 51 with respect to the connection pipe 52 can be suppressed by the above-described operation, and the inclination of the floor surface suction tool S can be suppressed.
As a result, when the floor suction tool S is lifted, the floor suction tool S is unlikely to be inclined to the right or left (the side where the drive portion of the rotating brush 60 is located), and floor suction to the surface G to be cleaned When the tool S is grounded, the floor suction tool S does not contact the surface G to be cleaned in an oblique state, so that it is possible to prevent applying a strong impact to the surface G and the floor suction tool S to be cleaned.

As described above, the floor suction tool according to the present invention is used for a vacuum cleaner in which the rotary brush is stably driven to rotate stably regardless of the mounting state of the rotary brush on the floor suction tool main body and the load received at the time of use. it can.

C Electric vacuum cleaner, 10 vacuum cleaner body, 20 hoses, 21a hand operation section,
30 extension pipe, S floor suction device, 40 case, 41 lower case,
41a suction port, 42 upper case, 42a front opening, 43 dust removal tool,
43a ring part, 43b claw part, 45 dust collection air path, 46 top cover,
50 connections, 60 rotating brushes, 70 drives, 71 cases,
71a inlet, 71b exhaust, 72 turbine, 73 drive side mounting guide

Claims

A case having an outer shell, a rotating brush rotatably provided inside the case, a drive unit for rotationally driving the rotary brush provided in the case, and a driving force transmitted from the drive unit to connect with the rotating brush With drive side mounting guide,
The floor suction device characterized in that the rotating brush and the drive side mounting guide are connected by a universal joint structure.
The rotating brush has a shaft pivotally supported by the case and a recess is formed at one end, and a groove parallel to the shaft is formed in the recess.
The drive-side mounting guide has a substantially cylindrical base, and an arc-shaped power transmission rib projecting radially from the base.
The drive-side mounting guide enters the recess in the axial direction of the shaft, the power transmission rib enters the groove, and the rotary brush and the drive-side mounting guide are engaged in the rotational direction of the rotary brush The floor surface suction tool according to claim 1, characterized in that:
A vacuum cleaner comprising the floor suction tool according to any one of claims 1 or 2.