CN110419981B

CN110419981B - Brush nozzle for electric dust collector and electric dust collector with same

Info

Publication number: CN110419981B
Application number: CN201910278655.8A
Authority: CN
Inventors: 儿玉健次
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2018-05-01
Filing date: 2019-04-09
Publication date: 2021-10-15
Anticipated expiration: 2039-04-09
Also published as: JP7045922B2; JP2019193708A; CN110419981A

Abstract

The invention provides a brush suction nozzle for an electric dust collector and the electric dust collector with the same, which can improve cleaning efficiency and can be operated and used in one step. The brush suction nozzle for an electric dust collector of the invention is characterized by comprising: a nozzle body having a nozzle opening; a swing brush which is swingably attached to the vicinity of the nozzle opening of the nozzle body and has a brush surface which is in contact with a surface to be cleaned; and a biasing member that biases the oscillating brush in a predetermined direction; the brush nozzle for an electric vacuum cleaner is configured to maintain a state in which the brush surface is inclined with respect to a flow direction of air in the nozzle body by biasing the swing brush by the biasing member.

Description

Brush nozzle for electric dust collector and electric dust collector with same

Technical Field

The present invention relates to a brush suction nozzle for an electric dust collector and an electric dust collector with the same.

Background

As a conventional electric vacuum cleaner, a horizontal type electric vacuum cleaner is known, which includes: a cleaner body having wheels; a flexible hose having a downstream end connected to the insertion port of the cleaner body; a connecting pipe and a handle arranged at the upstream end of the flexible hose, an extension pipe connected to the insertion opening of the connecting pipe; and a suction port body connected to the extension pipe, and a foldable brush portion is provided near an insertion port of the connection pipe (for example, patent documents 1 and 2).

According to the electric vacuum cleaner, the brush is locked at the lifted position by removing the extension pipe from the connection pipe and lifting the brush forward of the insertion port of the connection pipe while releasing the lock at the folded position, whereby, for example, dust can be sucked and cleaned while rubbing a narrow gap, stairs, furniture, a shelf, and the like with the brush. Further, the locking is performed by engagement of the locking convex portion and the locking concave portion provided in the connection pipe and the brush portion.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2005-185480

Patent document 2: japanese unexamined patent publication No. 2012-71008

Disclosure of Invention

Technical problem to be solved by the invention

In the conventional vacuum cleaner, the brush portion is locked at the lifted position in use, and thus the angle between the brush surface of the brush portion, which contacts the surface to be cleaned, and the connection pipe is fixed (for example, 45 °). Therefore, for example, when the brush is reciprocated in the depth direction when cleaning the upper surface of the rack, the inclination angle of the connection pipe with respect to the surface to be cleaned is changed, that is, when the brush is moved from the near side to the deep side, the inclination angle is decreased and the front portion of the brush is floated, and when the brush is moved from the deep side to the near side, the inclination angle is increased and the rear portion of the brush is floated, which is a problem that the cleaning efficiency is easily lowered.

Further, for example, when removing dust attached to furniture with the brush part in the middle of cleaning the floor with the suction port body, it is necessary to perform a time-consuming two-step operation of removing the extension pipe from the connection pipe and raising the folded brush part to the front of the insertion port of the connection pipe.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a brush nozzle for an electric vacuum cleaner, which can improve cleaning efficiency and can be used in a single operation, and an electric vacuum cleaner including the same.

Means for solving the problems

Thus, according to the present invention, there is provided a brush nozzle for an electric vacuum cleaner, comprising: a nozzle body having a nozzle opening; a swing brush which is swingably attached to the vicinity of the nozzle opening of the nozzle body and has a brush surface which contacts a surface to be cleaned; and a biasing member that biases the oscillating brush in a predetermined direction;

the brush nozzle for an electric vacuum cleaner is configured to maintain a state in which the brush surface is inclined with respect to a flow direction of air in the nozzle body by biasing the swing brush by the biasing member.

Further, according to another aspect of the present invention, there is provided an electric vacuum cleaner including a cleaner main body; the extension pipe can be connected with the dust collector main body; the brush suction nozzle can be connected with the extension pipe; and a suction port body having a connection pipe portion inserted into the brush suction nozzle and connectable to the extension pipe.

Effects of the invention

The brush suction nozzle for an electric vacuum cleaner of the present invention can be attached to, for example, a suction port of a hand-held electric vacuum cleaner, a distal end portion of an extension pipe of a stick-type electric vacuum cleaner, a distal end portion of a flexible hose of a horizontal type electric vacuum cleaner, or the like in a fixed manner or a detachable manner.

The brush nozzle attached to the electric vacuum cleaner in this way is configured to maintain a state in which the brush surface is inclined with respect to the flow direction of air in the nozzle body by biasing the swing brush with the biasing member, and for example, when the brush nozzle is reciprocated in the depth direction in cleaning a narrow gap between furniture and a wall on a floor, an upper surface of furniture or a shelf, or the like, the swing brush is swung with respect to the nozzle body even if the inclination angle of the nozzle body with respect to the surface to be cleaned is changed, and the state in which the entire brush surface is always in contact with the surface to be cleaned can be maintained. Therefore, the brush nozzle is not easily lifted at the front portion thereof when the brush nozzle is moved forward from near to deep, and is not easily lifted at the rear portion thereof when the brush nozzle is moved forward from deep to near, whereby the cleaning efficiency can be improved.

Drawings

Fig. 1 is a perspective view showing a first embodiment of an electric vacuum cleaner including a brush nozzle of the present invention.

Fig. 2 is a partial sectional view showing an internal structure of the electric vacuum cleaner of fig. 1.

Fig. 3 is a perspective view showing an extension pipe having a brush suction nozzle in the electric vacuum cleaner of the first embodiment.

Fig. 4 shows an extension pipe according to the first embodiment, fig. 4(a) is a left side view, and fig. 4(B) is a left side view in a state where the oscillating brush oscillates.

Fig. 5 shows a nozzle body of the brush nozzle according to the first embodiment, fig. 5(a) is a perspective view seen from the nozzle opening side, fig. 5(B) is a left side view, and fig. 5(C) is a perspective view seen from the connecting opening side.

Fig. 6 shows a swinging brush of the brush nozzle of the first embodiment, fig. 6(a) is a perspective view seen from obliquely above, and fig. 6(B) is a perspective view seen from obliquely below.

Fig. 7 shows a terminal portion cover of the brush nozzle according to the first embodiment, in which fig. 7(a) is a perspective view of a proximal portion viewed obliquely from below, fig. 7(B) is a perspective view of a distal portion viewed obliquely from above, fig. 7(C) is a perspective view of a left side surface viewed obliquely from above, and fig. 7(D) is a perspective view of a right side surface viewed obliquely from below.

Fig. 8 is a view for cleaning a floor using the brush nozzle of the first embodiment, fig. 8(a) is a view for explaining a state in which the extension pipe is inclined, and fig. 8(B) is a view for explaining a state in which the extension pipe is lifted.

Fig. 9 is a view showing a state where the terminal portion cover is lifted up in the brush nozzle according to the first embodiment, as seen from the nozzle opening side.

Fig. 10 is a left side sectional view showing a state in which the terminal portion cover is tilted in the brush nozzle of the first embodiment.

Fig. 11 is a view from the nozzle opening side showing a state in which the terminal portion cover is tilted in the brush nozzle of the first embodiment.

Fig. 12 is a perspective view showing a second embodiment of an electric vacuum cleaner including the brush nozzle of the present invention.

Fig. 13 is a perspective view showing a third embodiment of an electric vacuum cleaner including the brush nozzle of the present invention.

Fig. 14 is a perspective view showing a fourth embodiment of an electric vacuum cleaner including the brush nozzle of the present invention.

Fig. 15 is a perspective view showing an extension pipe of the electric vacuum cleaner according to the fifth embodiment, in which fig. 15(a) is an extended state and fig. 15(B) is a shortened state.

Fig. 16(a) is a rear view of the extension pipe of fig. 15(a), fig. 16(B) is a left side view of the extension pipe of fig. 15(a), and fig. 16(C) is a left side sectional view of the extension pipe of fig. 15 (a).

Fig. 17 shows a hooking member in the extension pipe of fig. 15(a), fig. 17(a) is a left side view, and fig. 17(B) is an arrow sectional view of line I-I of fig. 17 (a).

Fig. 18 shows the hooking member of fig. 17, fig. 18(a) is a perspective view, fig. 18(B) is another perspective view, and fig. 18(C) is yet another perspective view.

FIG. 19 is an arrow sectional view showing the line II-II in FIG. 16 (B).

Fig. 20 is a perspective view showing a brush suction nozzle of the sixth embodiment.

Fig. 21(a) is a left side view of the brush nozzle of fig. 20, and fig. 21(B) is a left side view of the brush nozzle of fig. 20 in a state where a swing brush is swung.

Detailed Description

(first embodiment)

Fig. 1 is a perspective view showing a first embodiment of an electric vacuum cleaner including a brush nozzle of the present invention, and fig. 2 is a partial sectional view showing an internal structure of the electric vacuum cleaner of fig. 1. In the first embodiment, the brush nozzle of the present invention is attached to the extension pipe of the horizontal type electric vacuum cleaner as an example, but the attachment form of the brush nozzle of the present invention is not limited to the first embodiment, and may be attached as in the second to fourth embodiments described later.

As shown in fig. 1 and 2, an electric vacuum cleaner 1 according to a first embodiment includes: a cleaner main body 10; a flexible hose part 20 having a connection port 11a detachably connected to the cleaner body 10₂A downstream base end connecting portion 21 and an upstream tip end connecting portion 22; a handle portion 31 and an operation switch portion 32 connected to the distal end connecting portion 22 of the flexible tube portion 20; an extension tube 40 having a base end connection portion 41 connected to the downstream side of the tip end connection portion 22 of the flexible hose portion 20 and a tip end connection portion 42 connected to the upstream side; a brush suction nozzle 50 detachably attached to the distal end connecting portion 42 of the extension pipe 40; and a suction port body 60 detachably connected to the distal end connecting portion 42 of the extension pipe 40. The front-back, left-right, and up-down directions described in this specification are based on a user in a use state of the electric vacuum cleaner 1.

< vacuum cleaner main body >

The cleaner body 10 includes: a drive device 11 having a case 11a capable of traveling on a floor and an electric blower 11b housed in the case 11 a; and a dust collection unit 12 detachably attached to the housing 11a of the drive device 11.

Drive theIn the device 11, a pair of right and left wheels 11c are provided at the rear part of a housing 11a, a front wheel 11d is provided at the front lower surface of the housing 11a, a receiving part 11e for standing and housing an extension pipe 40 is provided at the right front position of the front wheel 11d at the lower surface of the housing 11a, and a concave mounting part 11a to which a dust collecting unit 12 is detachably mounted is provided on the upper surface side of the housing 11a₁. The receiving portion 11e is a rib formed in a T shape, for example, when viewed from the lower surface side of the housing 11 a.

The housing 11a is provided with the connection port 11a at a lower end thereof₂An exhaust port 11a is provided at the rear end₃At the mounting part 11a₁Is provided with a connecting port 11a₂An air discharge hole (not shown) and an air introduction hole (not shown) communicating with the air discharge port 11a, and a grip 11a is provided at an upper portion of a front end of the housing 11a₄And a plurality of legs 11a are provided at the rear end of the housing 11a₅。

In the case 11a, a connection port 11a is provided₂A first ventilation path is formed between the air outlet hole (not shown) and the air inlet hole (not shown), a second ventilation path is formed between the air outlet 11a and the air inlet hole (not shown), the electric blower 11b in the second ventilation path is disposed, a circuit board 11f is disposed downstream of the electric blower 11b in the second ventilation path, and a power cord reel 11g around which a power cord (not shown) is wound is disposed downstream of the circuit board 11f in the second ventilation path. The connection port 11a of the housing 11a₂Female terminal portions electrically connected to the circuit board 11f via not-shown lead wires are provided.

The dust collecting unit 12 is a multi-cyclone type dust collecting device including a dust collecting cup 12a and a centrifugal separation unit 12b detachably attached to the dust collecting cup 12 a.

A mounting part 11a mounted on the driving device 11 at the dust collecting unit 12₁An air inlet (not shown) capable of being air-tightly connected to the air outlet hole (not shown) is provided in the outer peripheral wall of the dust cup 12a, and a cover portion 12b, which will be described later, of the centrifugal separation unit 12b₄An air vent capable of being connected to the air inlet hole (not shown) in an airtight manner is providedAn outlet (not shown).

The centrifugal separation unit 12b includes: a first centrifugal separation part 12b having a cylindrical filter screen part (not shown) disposed in the dust cup 12a₁(ii) a A first centrifugal separation part 12b detachably and airtightly fitted into the opening of the dust cup 12a₁Communicating cup portion 12b₂(ii) a To engage with the cup portion 12b₂Is detachably connected to the cup 12b in a communicating manner₂Combined and provided with a plurality of centrifugal separation cylinders 12b₃₁Second centrifugal separation part 12b₃(ii) a And a second centrifugal separation part 12b₃Covering the second centrifugal separation part 12b in a communicating manner₃Cover part 12b₄。

According to the vacuum cleaner body 10 configured as described above, the electric blower 11b is driven to suck the air into the connection port 11a of the driving device 11₂The air containing the dust flows into the dust collecting cup 12a from an air introduction hole (not shown) of the dust collecting unit 12 through the first ventilation path, the first dust is turned and caught in the dust collecting cup 12a, and the air containing the second dust smaller than the first dust passes through the first centrifugal separation part 12b₁A filter mesh part (not shown) and the cup part 12b₂And flows into the second centrifugal separation part 12b₃Each centrifugal separation cylinder 12b₃₁In each centrifugal separation part 12b₃₁And the air separated from the second dust passes through the hood portion 12b₄The air flows into the second ventilation path from an air inlet (not shown) of the driving device 11 and flows out of the exhaust port 11a₃And discharged to the outside.

< Flexible hose portion >

The flexible hose part 20 has a hose main body 23 between the base end connection part 21 and the tip end connection part 22, and a conductive wire covered with an insulating material is spirally wound around the hose main body 23 to be integrated.

The base-end connecting portion 21 is provided with a male terminal portion, not shown, which is electrically connected to the conductive wire of the hose main body 23, and the distal-end connecting portion 22 is provided with a female terminal portion, not shown, which is electrically connected to the conductive wire of the hose main body 23 via the operation switch portion 32, the conductive annular sliding portion, and the like.

Further, at the front end connecting partThe foldable distal end brush 22a is swingably provided, and a first locking portion 22b having a locking claw (not shown) detachably locked to a locking recess 41b (see fig. 3) of the proximal end connecting portion 41 of the extension pipe 40 is provided. In addition, by pressing the button 22b of the first locking portion 22b₁And the locking claw is disengaged from the locking recess 41b to release the locking.

< extension pipe >

Fig. 3 is a perspective view showing an extension pipe having a brush suction nozzle in the electric vacuum cleaner of the first embodiment. Fig. 4 shows an extension pipe according to the first embodiment, fig. 4(a) is a left side view, and fig. 4(B) is a left side view in a state where the oscillating brush oscillates.

As shown in fig. 1 to 4, the extension tube 40 has a conductive wire covered with an insulating material therein, a male terminal portion 41a electrically connected to the conductive wire at the base end connection portion 41, and a female terminal portion 42a electrically connected to the conductive wire at the tip end connection portion 42 (see fig. 11).

The base end connection portion 41 of the extension tube 40 is inserted into and connected to the distal end connection portion 22 of the flexible hose portion 20, and thereby the male terminal portion 42a of the base end connection portion 41 is fitted into and electrically connected to the female terminal portion (not shown) of the distal end connection portion 22.

The proximal end connector 41 of the extension tube 40 is provided with the locking recess 41b for detachably locking a locking claw (not shown) of the first locking portion 22b of the distal end connector 22 when the proximal end connector 41 is inserted into the distal end connector 22 of the flexible hose portion 20, and a push button 43a of a lock release mechanism 43 to be described later.

The distal end connecting portion 42 is provided with a second locking portion 42b having a locking claw 42b detachably locked to a locking recess 62a (see fig. 2) provided in a connecting tube portion 62 of the suction port body 60₁And a button 42b₂。

In a state where the base end connecting portion 41 of the extension pipe 40 is connected to the distal end connecting portion 22 of the flexible hose portion 20, the male terminal portion 41a, the locking recess portion 41b, the female terminal portion 42a, and the second locking portion 42b of the extension pipe 40 are disposed on the front surface of the extension pipe 40.

The unlocking mechanism 43 is provided between the male terminal 41a and the second locking portion 42b on the front surface of the extension pipe 40 in the longitudinal direction, and includes: the button 43a provided in the vicinity of the male terminal portion 41 a; an acting piece 43c provided in the vicinity of the second locking portion 42 b; and a connecting wire 43b connecting the button 43a and the action piece 43c, wherein the connecting wire 43b is covered by a cover 43 d.

A locking claw 42b of a second locking part 42b locked to a locking recess 62a of a connecting pipe part 42 of the suction port body 60₁By pressing the push button 42b of the second locking portion 42b₂The lock can be released by disengaging the locking recess 62a, and the lock can be released by the lock release mechanism 43 located near the handle 31. In this case, the operating piece 43c is moved in the front-rear direction via the connecting wire 43b by pressing the button 43a, and the claw 42b is locked by the movement of the operating piece 43c₁The locking is released by disengaging the locking recess 62 a. Accordingly, the suction port body 60 is pressed with the foot, and the extension pipe 40 is pulled in a state where the second locking part 42b has been released by the lock releasing mechanism part 43, whereby the user can easily remove the suction port body 60 from the extension pipe 40 in a standing state.

Further, a belt member 44 is attached to the extension pipe 40 closer to the front end connecting portion 42 than the intermediate portion in the longitudinal direction, and a hooking member 45 is provided on the rear surface side of the extension pipe 40 in the belt member 44.

The hooking member 45 is formed in a box shape having a slit 45a (see fig. 3), and the slit 45a can be hooked to the T-shaped receiving portion 11e of the housing 11a from above.

< inhalation port body >

As shown in fig. 1 and 2, the suction port body 60 includes: a suction port body 61 having a suction port 61 a; the connecting pipe portion 62 provided to the suction port main body 61 to be rotatable in the front-rear-left-right direction; a rotary brush 63 rotatably provided in the vicinity of the suction port 61a in the suction port body 61; a not-shown motor for driving the rotary brush provided in the suction port body 61, and a not-shown pulley and belt for transmitting a rotational force from an output shaft of the motor to the rotary brush 63.

The connection tube part 62 of the suction port body 60 is provided with the locking recess 62a, and a male terminal part (not shown) electrically connected to a motor (not shown) via a lead wire, and the locking recess 62a detachably supplies the locking claw 42b of the second locking part 42b of the distal end connecting part 42 when the connection tube part 62 is inserted into and connected to the distal end connecting part 42 of the suction port body 40₁And (4) clamping.

< Brush suction nozzle >

Fig. 5 shows a nozzle body of the brush nozzle according to the first embodiment, fig. 5(a) is a perspective view seen from the nozzle opening side, fig. 5(B) is a left side view, and fig. 5(C) is a perspective view seen from the connecting opening side. Fig. 6 shows a swinging brush of the brush nozzle according to the first embodiment, in which fig. 6(a) is a perspective view seen from obliquely above, and fig. 6(B) is a perspective view seen from obliquely below. Fig. 7 shows a terminal portion cover of the brush nozzle according to the first embodiment, in which fig. 7(a) is a perspective view of a proximal portion viewed obliquely from below, fig. 7(B) is a perspective view of a distal portion viewed obliquely from above, fig. 7(C) is a perspective view of a left side surface viewed obliquely from above, and fig. 7(D) is a perspective view of a right side surface viewed obliquely from below.

As shown in fig. 3 to 7, the brush suction nozzle 50 includes: having a nozzle opening 51b₁A cylindrical nozzle body 51; a nozzle opening 51b swingably attached to the nozzle body 51₁A swinging brush 52 having a brush surface 52bf in contact with the surface to be cleaned; a pair of biasing members 53 (see fig. 5) for biasing the oscillating brush 52 in a predetermined direction; is swingably provided at the nozzle opening 51b₁An inner terminal portion cover 54; and a terminal portion cover biasing member, not shown, for biasing the terminal portion cover 54 in a predetermined direction. Here, the "brush surface 52 bf" refers to a front end planar region of the oscillating brush 52 which comes into contact with the surface to be cleaned among a plurality of bristle bundles 52B described later, and in the first embodiment, refers to a U-shaped front end planar region which is open at the rear (see fig. 6B). The front end plane region may be substantially U-shaped or V-shaped.

As shown in fig. 4a, the brush nozzle 50 is configured to bias the swinging brush 52 by the biasing member 53 so as to maintain a state in which the brush surface 52bf is inclined with respect to the flow direction of the air in the nozzle body 51, that is, the longitudinal direction (the direction of the straight line L) of the nozzle body 51, that is, so that the inclination angle θ of the brush surface 52bf with respect to the longitudinal direction (the direction of the straight line L) of the nozzle body 51 becomes a lower limit set angle (for example, about 45 °). Fig. 4B shows a state in which the swinging brush 52 is forcibly swung against the urging force of the urging member 53 so that the inclination angle θ of the brush surface 52bf with respect to the longitudinal direction (direction of the straight line L) of the nozzle body 51 becomes larger than the upper limit set angle (for example, about 80 °) of the lower limit set angle.

Hereinafter, each member will be specifically described.

[ suction nozzle body ]

As shown in fig. 5(a) to (C), the nozzle body 51 includes: in the longitudinal direction (direction of the straight line L) with the nozzle opening 51b₁Has a connecting port 51a at the opposite side₁The connecting tube portion 51 a; has a pair of shaft parts 51b for supporting the swinging brush 52 in a swinging manner₂And a suction nozzle port 51b₁The brush support portion 51 b; along the nozzle opening 51b₁A brush holder portion 51c provided at a part of the outer peripheral portion of the brush holder; and an auxiliary brush part 51d provided to the brush stage part 51 c.

A connection port 51a of the connection pipe part 51a₁The extension pipe 40 has a size and shape for inserting the distal end connection part 42 without play, and a notch part 51a is provided on the upper surface of the connection pipe part 51a₂The notch 51a₂For non-interfering insertion into the connection port 51a₁The push button 42b of the second locking portion 42b of the front end connecting portion 42₂And the button 42b₂Exposed to the outside.

The brush support portion 51b communicating with the connecting tube portion 51a has an upper surface curved in an arc shape and flat left and right side surfaces, and a pair of protruding sliding contact ribs 51b are provided on the upper surface₃The protruding shaft parts 51b are provided on the left and right side surfaces, respectively₂And a stopper rib 51b₄。

Further, on the left and right side surfaces of the connecting pipe portion 51a, on the respective shaft portions 51b₂An annular recess 51b for accommodating a torsion coil spring serving as a biasing member 53 described later is provided around the spring₅At the nozzle opening 51b₁NearbyThe upper part is provided with a mounting hole 51b for mounting a terminal cover 54 to be described later₆。

A pair of sliding contact ribs 51b₃Along the nozzle opening 51b₁Is disposed so as to be in sliding contact with an inner surface of a brush base member 52a (described later) and to be stopped when the oscillating brush 52 oscillates (closes) until the inclination angle θ of the brush surface 52bf becomes a lower limit set angle (see fig. 4 a).

A pair of left and right shaft portions 51b₂And is disposed at the arc center position of the upper surface of the brush support portion 51b on the same axis.

A pair of right and left stopper ribs 51b₄Is disposed at a position where it abuts against an end of a brush base member 52a (described later) and is stopped when the inclination angle θ of the brush surface 52bf of the oscillating brush 52 becomes the upper limit set angle (see fig. 4 (b)).

The brush table part 51c is along the nozzle opening 51b₁Has a thick U-shaped portion having a bristle planting surface 51c substantially parallel to the brush surface of the oscillating brush 52 (fig. 4A) in a closed state₁And on the bristle setting surface 51c₁Has a plurality of bristle planting holes.

In addition, the suction nozzle opening 51b₁The bristle setting surface 51c₁The vicinity of the nozzle opening 51B is inclined with respect to the longitudinal direction (direction of the straight line L) of the nozzle body 51 at an angle substantially equal to the inclination angle θ (fig. 4a and 5B) of the lower limit set angle, and the nozzle opening 51B is opened₁Is opened in such a manner as to be inclined at an inclination angle larger than the angle.

The auxiliary brush part 51d is formed by a plurality of bristle bundles 51d implanted in a plurality of bristle implanting holes of the brush block part 51c₁Is composed of bristle bundles 51d₁Extends substantially parallel to the longitudinal direction (direction of the line L) of the nozzle body 51.

[ Oscillating brush ]

As shown in fig. 6(a) and (B), the oscillating brush 52 includes: a brush base material 52a along the nozzle opening 51b of the nozzle body 51₁I.e., along the nozzle opening 51b₁Is formed in a U-shape in such a manner that a portion of the outer peripheral portion of (a) is mainly other than the brush holder portion 51 c;and a plurality of bristle bundles 52b implanted in the brush base material 52 a.

The brush base material 52a includes: has a U-shaped bristle setting surface 52a₁₁ Brush holder portion 52a₁Along the brush holder portion 52a₁The bristle setting surface 52a₁₁Cover part 52a arranged on the opposite side₂Is provided on the cover portion 52a₂Is pivotally connected to a pair of shaft portions 51b of the nozzle body 51 at the inner surfaces of both end portions of the U-shape₂A pair of pivotal connection portions 52a₃. In addition, the bristle setting surface 52a₁₁A plurality of bristle planting holes are formed.

In the case of the first embodiment, the pair of shaft portions 51b of the nozzle body 51₂A pair of pivotal connection parts 52a of the oscillating brush 52 having a cylindrical shape₃Is formed to be inserted into the pair of shaft parts 51b without play and capable of rotating₂An inner cylindrical shape. Cover 52a is provided₂Each pivot connection portion 52a of the inner surfaces of both end portions₃An annular recess 52a for accommodating a torsion coil spring as a biasing member 53 described later is provided around the shaft₂₁。

A plurality of bristle bundles 52b are implanted on the bristle implanting surface 52a of the brush base material 52a, respectively₁₁In the plural bristle planting holes, each bristle bundle 52b of the oscillating brush 52 extends substantially parallel to the longitudinal direction (the direction of the straight line L) of the nozzle body 51 when the inclination angle θ of the brush surface 52bf is the lower limit set angle (fig. 4 a). At this time, the tip of the auxiliary brush 51d of the nozzle body 51 is also aligned with the brush surface 52 bf.

[ urging member ]

As shown in fig. 5, the urging member 53 is formed by a torsion coil spring, and when the swing brush 52 is assembled to the nozzle body 51, the pair of shaft portions 51b of the nozzle body 51 are engaged₂The oscillating brush 52 is assembled with the wheel portion of each torsion coil spring passing through. At this time, the curved both end portions of each torsion coil spring are hooked on the annular concave portion 51b of the nozzle body 51₅And an annular recess 52a of the oscillating brush 52₂₁A part of (a). Thus, the tilting angle θ of the swing brush 52 to the brush surface 52bf with respect to the nozzle body 51 by the torsion coil springs (the biasing members 53) is set to the direction of the lower limit set angle(the direction in which the oscillating brush 52 is closed) is urged (fig. 4 (a)). In addition, the annular recess 51b₅And the annular recess 52a₂₁The portion of (a) may be a hole, a recess, a rib, or the like, to which both bent end portions of the torsion coil spring are hooked. Further, the torsion coil spring as the urging member 53 may be provided only on one side.

[ terminal cover and urging member for terminal cover ]

As shown in fig. 7(a) to (D), the terminal portion cover 54 includes: a concave curved surface portion 54a provided on one surface side; a convex curved smooth surface portion 54b provided on the other surface side opposite to the one surface side; and a shaft portion 54c provided coaxially with the front end portion side of the left and right side surfaces.

To be more specific, a plate-like guide surface portion 54d inclined with respect to the longitudinal direction of the concave curved surface portion 54a is provided on the front end portion side of the concave curved surface portion 54a, plate-like eaves 54e provided to be continuous with the guide surface portion 54d are provided on both left and right end portions of the concave curved surface portion 54a, a left side surface portion 54f having a plate-like shape in the longitudinal direction is provided on the left end portion side of the smooth surface portion 54b, a plate-like right side surface portion 54g is provided along the right end portion of the right eaves 54e, and a left and right rib 54h is provided at a position between the pair of shaft portions 54c of the smooth surface portion 54 b. The pair of shaft portions 54c are disposed on the outer surface of the left side surface 54f and the outer surface of the right side surface 54 g.

With the terminal portion cover 54 configured as described above, the smooth surface portion 54b on the back surface of the concave curved surface portion 54a is a smooth surface having no step on the rear end side of the rib 54 h.

The terminal cover biasing member, not shown, is formed of a torsion coil spring.

When the terminal part cover 54 is mounted in the nozzle body 51, the pair of shaft parts 54c are fitted into the pair of mounting holes 51b of the nozzle body 51 in a state where the shaft part 54c on the brim part 54e side passes through the wheel part of the torsion coil spring₆。

< State of use of electric vacuum cleaner >

Fig. 8 is a view for cleaning a floor surface by the brush nozzle of the first embodiment, fig. 8(a) is a view for explaining a state where the extension pipe is inclined, and fig. 8(B) is a view for explaining a state where the extension pipe is lifted. Fig. 9 is a view, as viewed from the nozzle opening side, showing a state in which the terminal portion cover is lifted up in the brush nozzle of the first embodiment, fig. 10 is a left side sectional view showing a state in which the terminal portion cover is tilted down in the brush nozzle of the first embodiment, and fig. 11 is a view, as viewed from the nozzle opening side, showing a state in which the terminal portion cover is tilted down in the brush nozzle of the first embodiment.

In the embodiment of the electric vacuum cleaner 1 shown in fig. 1 and 2, the connection pipe portion 62 of the suction port body 60 is connected to the distal end connection portion 42 of the extension pipe 40, so that the suction port body 60 can be cleaned while traveling on the floor.

Also, in cleaning a floor, for example, in the case of cleaning a narrow gap between a wall in the floor and furniture, the suction port body 60 is removed from the extension pipe 40, and the brush suction nozzle 50 mounted to the front end connection portion 42 of the extension pipe 40 is brought into the gap and moved back and forth. At this time, when the brush nozzle 50 is moved from the near side of the gap to the deep side (forward side), as shown in fig. 8(a), the extension pipe 40 is inclined at an angle of approximately 45 ° with respect to the floor F, the brush surface 52bf of the swing brush 52 and the auxiliary brush 51d slide on the floor F to sweep off dust, and the swept off dust can be sucked into the nozzle opening 51b₁And removed.

When the brush nozzle 50 is moved from the depth of the gap to the near front (rear), as shown in fig. 8B, the extension pipe 40 is lifted up to an angle close to 90 ° with respect to the floor F, but the swing brush 52 swings in the opening direction with respect to the nozzle main body 51 against the urging force of the urging member 53, so that the brush surface 52bf of the swing brush 52 does not sweep dust away from the floor F even if the auxiliary brush 51d slightly floats from the floor F, and the swept dust can be sucked into the nozzle opening 51B₁And removed. When the brush suction nozzle 50 is moved back from the near position to the deep position, the swing brush 52 is naturally swung in the closing direction by the urging force of the urging member 53 (see fig. 8 a). In addition, the angle at which the extension pipe 40 is lifted may exceed 90 °.

Thus, when the brush nozzle 50 is used to clean the floor F, the nozzle opening 51b is provided₁The inner terminal portion cover 54 is covered by a terminal portion not shownSince the biasing member (torsion coil spring) biases in the lifting direction, as shown in fig. 9, the female terminal portion 42a (see fig. 11) provided in the distal end connecting portion 42 of the extension pipe 40 is covered with the lifted terminal portion cover 54 and is not visible from the outside. Therefore, the suction nozzle 51b can be prevented from being sucked into₁The dust is attached to the female terminal portion 42a, and thus, a contact failure occurs between a male terminal portion (not shown) on the suction port body 60 side and the female terminal portion 42a on the extension pipe 40 side when the suction port body 60 is connected to the extension pipe 40 again.

When the suction port body 60 is connected to the extension pipe 40, the connection pipe part 62 of the suction port body 60 is inserted into the suction port 51b of the suction nozzle brush 50₁. At this time, the connecting tube portion 62 abuts on the terminal portion cover 54, but the tip end portion of the connecting tube portion 62 is guided from the guide surface portion 54d of the terminal portion cover 54 to the concave curved surface portion 54a, and the terminal portion cover 54 lifted up accordingly swings in the direction of falling against the biasing force of the biasing member for the terminal portion cover (fig. 10 and 11). Then, the terminal cover 54 is tilted, so that the female terminal 42a on the distal end connecting portion 42 side of the extension pipe 40 faces the male terminal (not shown) on the connecting pipe portion 62 side of the suction port body 60 and they are electrically connected.

Although fig. 10 and 11 show the oscillating brush 50 in an open state, the terminal cover 54 may be tilted to connect the inlet body 60 to the extension pipe 40 even in a closed state of the oscillating brush 50 (fig. 4a and 9).

Further, since the rear end portion side of the smooth surface portion 54B (fig. 7B) on the rear surface side of the terminal portion cover 54 is a smooth surface having no step, it is possible to prevent a problem that dust is accumulated on the smooth surface portion 54B, and the accumulated dust is scattered and attached to the female terminal portion 42a of the extension pipe 40.

Further, according to the electric vacuum cleaner 1 of the first embodiment, as shown in fig. 1 and 2, three leg portions 11a are used₅By raising the vacuum cleaner body 10 and hooking the hooking member 45 of the extension pipe 40 to the receiving portion 11e provided in the vacuum cleaner body 10, the electric vacuum cleaner 1 can be stored in a narrow space in a standing state without being hindered by the extension pipe 40 and the flexible hose portion 20.

Further, since the protruding dimension of the brush nozzle 50 toward the cleaner body 10 is suppressed to be small, the hooking member 45 can be made compact. Therefore, even if the suction port body 60 is removed from the extension pipe 40 and stored in a standing state, the brush suction nozzle 50 floating from the floor F can be stabilized. That is, if the hooking member 45 is enlarged, the gap between the extension pipe 40 and the cleaner body 10 is enlarged, and the brush suction nozzle 50 is shaken and is difficult to be stabilized when stored in a standing state.

(second embodiment)

In the horizontal vacuum cleaner 1 according to the first embodiment, the brush nozzle 50 is attached to the distal end connection portion 42 of the extension pipe 40, but as shown in fig. 12, the brush nozzle 50 may be attached to the distal end connection portion 122 of the flexible hose portion 120 of the horizontal vacuum cleaner 101, and the extension pipe 140 inserted into the brush nozzle 50 may be connected to the distal end connection portion 122 of the flexible hose portion 120.

According to the electric vacuum cleaner 101 of the second embodiment, by removing the extension pipe 140 from the flexible hose part 120, suction cleaning for removing dust adhering to stairs, furniture, shelves, and the like can be performed by the brush nozzle 50 while holding the cleaner body 110 by hand.

Further, the brush suction nozzle 50 may be removed from the distal end connecting portion 122 of the flexible hose portion 120, and the suction port body 160 may be removed from the extension pipe 140, so that the brush suction nozzle 50 can be replaced at the distal end connecting portion 142 of the extension pipe 140, as in the first embodiment.

(third embodiment)

Fig. 13 is a perspective view showing a third embodiment of an electric vacuum cleaner including the brush nozzle of the present invention. In fig. 13, the same elements as those in fig. 1 are denoted by the same reference numerals.

The third embodiment is a stick type electric vacuum cleaner 201, and includes: a cleaner main body 210 having a driving device 211, and a dust collection unit 212 and a battery 213 that are detachably attached thereto; and an extension pipe 40, a brush suction nozzle 50, and a suction port body 60 used in the electric vacuum cleaner 1 of the first embodiment.

That is, the extension pipe 40, the brush nozzle 50, and the suction port body 60 of the horizontal type electric vacuum cleaner 1 of the first embodiment can be replaced at the front end connecting portion 211a of the cleaner main body 210 in the stick type electric vacuum cleaner 201 of the second embodiment.

The stick type vacuum cleaner 201 can also perform both cleaning of a large floor by the suction port body 60 and cleaning of a gap portion by the brush suction nozzle 50.

(fourth embodiment)

Fig. 14 is a perspective view showing a fourth embodiment of an electric vacuum cleaner including the brush nozzle of the present invention. In fig. 14, the same elements as those in fig. 13 are denoted by the same reference numerals.

The fourth embodiment is a hand-held electric vacuum cleaner 301, and includes: a cleaner main body 310 having a driving device 311, a dust collection unit 312 detachably attached to the driving device 311, and a battery (not shown); and a brush suction nozzle 50 installed at a front suction port 311a of the cleaner body 310.

According to such a hand-held electric vacuum cleaner 301, it can be suitably used for suction cleaning of dust attached to stairs, furniture, shelves, and the like, in-vehicle cleaning, and the like.

Further, if the extension pipe 40 connected to the suction port body 60 used in the third embodiment is inserted into the brush suction nozzle 50 of the hand-held electric vacuum cleaner 301, and the extension pipe 40 is connected to the front end suction port 311a of the driving device 311, the hand-held electric vacuum cleaner can be used as a stick type electric vacuum cleaner.

(fifth embodiment)

Fig. 15 is a perspective view showing an extension pipe of the electric vacuum cleaner according to the fifth embodiment, in which fig. 15(a) is an extended state and fig. 15(B) is a shortened state. Fig. 16(a) is a rear view of the extension pipe of fig. 15(a), fig. 16(B) is a left side view of the extension pipe of fig. 15(a), and fig. 16(C) is a left side sectional view of the extension pipe of fig. 15 (a).

The extendable and retractable extension pipe 240 has an outer tube 240a and an inner tube 240b slidably inserted into the outer tube 240a, and a hooking member 145 described later is attached to the distal end connecting portion 240by side of the inner tube 240 b.

The outer tube portion 240a includes: outer cylinder body 240a₁(ii) a Is provided along the longitudinal direction in the outer cylinder body 240a₁Front surface cover member 240a of₂(ii) a Is accommodated in the cover member 240a₂An inner conductor (not shown) electrically connected to the conductor and provided on the outer tube body 240a₁Male terminal 240a with its base end connector 240ax exposed₃(ii) a Is provided on the outer cylinder body 240a₁The short cylindrical locking mechanism 240a of the distal end connecting portion 240ay₄(ii) a And an outer cylinder body 240a₁The base end connection part 240ax of (2) has a locking recess 240a₅。

Locking mechanism 240a₄Comprising: button 240a provided on the front surface side₄₁(ii) a Push button 240a₄₁Compression spring 240a for applying force to outside₄₂(ii) a And is provided to the button 240a₄₁The opposite side of the locking projection 240a₄₃。

In addition, the male terminal 240a of the outer cylinder 240a₃And a locking recess 240a₅The same function as the male terminal portion 41a and the locking recess portion 41b in the extension pipe 40 described in the first embodiment is exhibited.

The inner tube portion 240b includes: inner cylinder body 240b₁(ii) a Is provided along the longitudinal direction in the inner cylinder main body 240b₁Front surface cover member 240b₂(ii) a Is accommodated in the cover member 240b so as to be capable of sliding contact with a conductor (not shown) of the outer cylindrical body 240a₂An inner conductor (not shown) electrically connected to the conductor and provided in the inner tube body 240b₁The front end connecting part 240by of the female terminal part 240b₃(ii) a And an inner cylinder body 240b₁The locking part 240b of the leading end connecting part 240by₄。

In addition, the female terminal 240b of the inner tube 240b₃And a locking part 240b₄The same functions as the male terminal portion 42a and the second locking portion 42b in the extension pipe 40 described in the first embodiment are performed.

Also, the inner tube body 240b₁The rear surface of the housing has three types of first recesses 240b arranged in parallel in order toward the front end connecting portion 240by₁₁And a second recess 240b₁₂And a third recess 240b₁₃。

First recess 240b₁₁Is detachably provided to the outer cylinder body 240a₁The locking mechanism 240a on the rear surface side₄The locking projection 240a₄₃One of the locking recesses is provided at each position.

Third recess 240b₁₃Two recesses are provided at each position, and the recesses are detachably engaged with a pair of positioning protrusions 145d of a hooking member 145, which will be described later.

According to the extension pipe 240, the locking mechanism 240a of the outer tube 240a is pressed₄ Button 240a of₄₁A locking mechanism part 240a₄The locking projection 240a₄₃A first recess 240b separated from the inner tube 240b₁₁In this state, the outer cylinder 240a and the inner cylinder 240b can slide relative to each other, and are locked to the locking protrusions 240a by changing the state₄₃First recess 240b₁₁And the length of the extension pipe 240 can be adjusted in multiple stages.

Fig. 17 shows a hooking member in the extension pipe of fig. 15(a), fig. 17(a) is a left side view, and fig. 17(B) is an arrow sectional view of line I-I of fig. 17 (a). Fig. 18 shows the hooking member of fig. 17, fig. 18(a) is a perspective view, fig. 18(B) is another perspective view, and fig. 18(C) is yet another perspective view.

The hooking member 145 attached to the extension pipe 240 of the fifth embodiment is a third recess 240b that can utilize the inner tube 240b₁₃A member for positioning, and having: with lengthwise slits 240a₁The cylindrical portion 240 a; a notch 240a having an outer surface corresponding to the cylindrical portion 240a₁A pair of stoppers 240b connected to the bolt insertion holes formed at both sides thereof; a hook portion 145c having the same configuration as the hook member 45 described in the first embodiment and provided in connection with one stopper portion 240 b; and a notch 240a provided on the inner surface of the cylindrical portion 240a₁The pair of positioning protrusions 145d on both sides thereof.

The hooking member 145 is an integrally molded part of resin, and thus the cylindrical portion 240a can be elastically deformed. Thereby, the notch 240a of the hooking member 145 is hooked₁Is widened for the inner cylinder main body 240b₁A second concave part 240b for engaging and locking the pair of positioning convex parts 145d at the required positions₁₂The hooking member 145 can be positioned in the inner cylinder body 240b by fastening the bolt insertion holes of the pair of stoppers 240b with bolts (not shown) and nuts (not shown)₁And fixed in the desired position.

In the fifth embodiment, the inner tube main body 240b is exemplified₁In the case where the hooking member 145 is fixed to the tip end connecting portion 240by side, as described with reference to fig. 1 and 2, the hooking member 145 is hooked to the receiving portion 11e of the cleaner body 10 in a state where the suction port body 60 is placed on the floor F, and thereby the extension pipe 240 can be erected to house the vacuum cleaner. In this case, the brush suction nozzle 50 may be attached to the distal end connecting portion 240by of the extension pipe 240 as in the first embodiment.

In addition, according to the configuration of the extension pipe 240 and the hooking member 145 of the fifth embodiment, the length of the cylindrical portion 240a of the hooking member 145 and the first concave portion 240b of the extension pipe 240 are changed₁₁And a second recess 240b₁₂And a third recess 240b₁₃The size, the interval, etc. of the receiving part 145, and the fixing position of the receiving part 11e to the extension pipe 145 can be changed by the common receiving part 145 even if the height position of the receiving part 11e is changed according to the model of the vacuum cleaner. As a result, it is not necessary to manufacture a mold for each model and adjust the position of the hooking member, and thus the investment in the mold can be suppressed.

(sixth embodiment)

Fig. 20 is a perspective view showing a brush suction nozzle of the sixth embodiment. Fig. 21(a) is a left side view of the brush nozzle of fig. 20, and fig. 21(B) is a left side view of the brush nozzle of fig. 20 in a state where the swing brush swings. In fig. 20 and 21, the same elements as those in fig. 4 to 8 are denoted by the same reference numerals.

In the brush nozzle 50 of the first embodiment, stopper ribs 51b are provided on the left and right side surfaces of the nozzle body 51₄(see fig. 4 and 5), in the brush nozzle 150 according to the sixth embodiment, the nozzle body may be providedStopper ribs 151b are provided on the right and left sides of the frame 151₄And further with the stopper rib 151b₄Adjacently disposed non-slip ribs 151b₅. In the sixth embodiment, the other configurations are the same as those in the first embodiment.

According to the brush nozzle 150 of the sixth embodiment, the anti-slip ribs 151b are provided on the left and right side surfaces of the nozzle main body 151₅When the user removes the brush suction nozzle 150 from the extension pipe 40, the brush suction nozzle is removed by abutting the finger against the left and right anti-slip ribs 151b₅And pulled forward, the brush nozzle 150 can be easily pulled out from the extension pipe 40 without sliding of fingers.

(other embodiments)

1. In the electric vacuum cleaners of the first to fourth embodiments, as long as the brush nozzle 50 is detachably attached to the distal end connecting portion 42 of the extension pipe 40, the distal end connecting portion 122 of the flexible hose portion 120, and the distal end suction port 311a of the driving device 311, the use form of the brush nozzle 50 can be changed according to the cleaning portion, and thus it is convenient, but the brush nozzle may be fixedly attached to a plurality of connecting portions in the electric vacuum cleaner.

2. In the brush suction nozzle 50 of the first to fourth embodiments, a torsion coil spring is used as the biasing member 53 for biasing the swing brush 52 and the terminal cover biasing member for biasing the terminal cover 54, but the torsion coil spring is not limited thereto, and for example, an elongated plate spring may be bent into a ring shape.

3. The first to third embodiments exemplify the electric vacuum cleaners having the suction port body having the rotary brush rotated by the motor, and the rotary brush of the suction port body may be rotated by the turbine, or the rotary brush may be omitted. In these cases, the terminal portion cover provided in the brush nozzle 50 and the biasing member for the terminal portion cover can be omitted.

(conclusion)

The brush suction nozzle for an electric dust collector of the present invention comprises: a nozzle body having a nozzle opening; a swing brush which is swingably attached to the vicinity of the nozzle opening of the nozzle body and has a brush surface which is in contact with a surface to be cleaned; and a biasing member that biases the oscillating brush in a predetermined direction;

The brush nozzle for an electric vacuum cleaner of the present invention may be configured as follows, or may be appropriately combined.

(1) The nozzle body may have a connection port on an opposite side of the nozzle opening,

the connection port can be connected with a front end suction port of a cleaner main body of the electric cleaner or an accessory connector of the electric cleaner,

the nozzle port is configured to allow insertion of another accessory connector when the tip suction port connected to the connection port or the one connector is connected to the other accessory connector for the electric vacuum cleaner.

With this configuration, the following effects are achieved.

(I) The brush suction nozzle of the present invention can be connected to the suction port of the hand-held electric cleaner in a fixed manner or in a detachable manner. In this case, for example, a brush nozzle attached to the hand-held electric cleaner can be used when suction-cleaning dust attached to stairs, furniture, a shelf upper surface, and the like.

Further, the hand-held electric vacuum cleaner can be used as a stick-type electric vacuum cleaner. In this case, the base end portion of the extension pipe, which is the other connector for the electric vacuum cleaner, is inserted into the nozzle opening of the brush nozzle connected to the suction port of the hand-held electric vacuum cleaner and connected to the suction port, and the connecting pipe portion of the suction port body is connected to the tip end portion of the extension pipe, thereby being used as a pole type electric vacuum cleaner for sucking and cleaning a large floor. Further, the brush nozzle can be easily returned to the usable state by one operation of pulling out the extension pipe from the suction port of the hand-held electric cleaner.

(II) the brush suction nozzle of the present invention can be fixedly or detachably connected to the extension pipe as the one connector of the stick type electric vacuum cleaner. In this case, for example, when dust accumulated in a narrow gap between a wall on a floor and furniture is sucked and cleaned, a brush nozzle connected to a tip end of an extension pipe of a stick type electric vacuum cleaner can be used.

Further, the connecting pipe portion as the suction port body of the other connector is inserted into the suction port of the brush suction nozzle connected to the tip end portion of the extension pipe and connected to the extension pipe, whereby the large floor can be sucked and cleaned by the stick type electric vacuum cleaner. Further, the brush nozzle can be easily returned to a usable state by one-step operation of pulling out the suction port body from the extension pipe of the stick type electric cleaner.

(III) the brush nozzle of the present invention can be fixedly or detachably connected to the flexible hose as the one connector of the horizontal type electric vacuum cleaner. In this case, for example, a brush nozzle connected to a horizontal type electric vacuum cleaner can be used when suction-cleaning dust attached to stairs, furniture, an upper surface of a shelf, and the like.

Further, the base end portion of the extension pipe as the other connector is inserted into the nozzle port of the brush nozzle connected to the tip end portion of the flexible hose to be connected to the flexible hose, and the connecting pipe portion of the nozzle body is connected to the tip end portion of the extension pipe, whereby the horizontal type vacuum cleaner can clean the large floor by suction. Further, the brush suction nozzle can be easily returned to a usable state by one-step operation of pulling out the extension pipe from the flexible hose of the horizontal type electric vacuum cleaner.

(2) The nozzle body may include: a connecting tube portion having the connecting port; a brush support portion having a pair of shaft portions for swingably supporting the swing brush and the nozzle opening; a brush holder portion provided along a part of an outer peripheral portion of the nozzle opening; and an auxiliary brush part arranged on the brush holder part,

the oscillating brush may have: a brush base material formed in a substantially U-shape along the other portion of the outer peripheral portion of the nozzle opening of the nozzle body and having both end portions pivotally connected to the pair of shaft portions; and a plurality of bristle bundles implanted on the brush base material.

According to this configuration, the auxiliary brush portion is provided in the nozzle body, so that the brush base having the plurality of bristle bundles can be formed into a U shape, and thus both end portions of the brush base can be prevented from protruding further rearward from the nozzle body. Further, if the nozzle main body does not have the auxiliary brush portion, the brush base must be formed in an elliptical shape so as to surround the entire periphery of the nozzle opening.

For example, in the case of a horizontal type vacuum cleaner capable of housing an extension pipe in a standing manner, a hooking portion is generally provided at a rear portion (back surface) of the extension pipe, and the hooking portion is hooked and housed in a receiving portion provided in a cleaner body, and in this case, the hooking portion needs to be retracted to the outside of a swing path of a swing brush so that a brush suction nozzle does not interfere with the cleaner body.

According to the present invention, since the projecting dimension of the hooking portion to the rear can be suppressed to be small, the extension pipe of the electric vacuum cleaner can be stored in a standing state with the brush nozzle in a stable state.

(3) May further comprise: a terminal portion cover which is swingably attached to an inner surface of the nozzle opening of the nozzle body; and a terminal cover biasing member for biasing the terminal cover in a direction of lifting the terminal cover;

the terminal portion cover may have a concave curved surface portion that receives an outer surface of a connection pipe portion of the suction port body inserted into the suction port of the suction nozzle main body to be connected with the extension pipe.

According to this configuration, for example, a stick-type or horizontal-type vacuum cleaner having a suction port body with a motor-driven rotary brush can be handled. That is, the inlet body and the extension pipe are provided with a lead wire and a terminal portion for supplying power to the motor in the inlet body, and the brush nozzle is provided with a terminal portion cover for protecting the terminal portion of the extension pipe connected to the brush nozzle. That is, according to the terminal portion cover, when the suction port body is removed from the extension pipe connected to the brush nozzle and sucked and cleaned by the brush nozzle, it is possible to prevent dust sucked to the brush nozzle from being attached to the terminal portion of the extension pipe by the terminal portion cover.

(4) The terminal portion cover may have a smooth surface portion on a back surface of the concave curved surface portion.

According to this configuration, since the back surface of the concave curved surface portion of the terminal portion cover is a smooth surface portion, dust is less likely to accumulate, and dust can be prevented from accumulating on the back surface of the concave curved surface and adhering to the terminal portion due to long-term use of the brush nozzle.

The disclosed embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the present invention is indicated not by the description but by the claims, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Description of the reference numerals

1. 101, 201, 301 electric vacuum cleaner

10. 110, 210, 310 cleaner main body

20. 120 flexible hose part (connecting tool)

40. 140 extension pipe (connecting tool)

50 brush suction nozzle

51 suction nozzle body

51a connecting pipe part

51a₁Connecting port

51b Brush support

51b₁Suction nozzle

51b₂Shaft part

51c brush platform part

51d auxiliary brush part

52 oscillating brush

52a Brush base

52b bundle of bristles

52bf brush surface

53 force application part

54 terminal cover

54a concave curved surface part

54b smooth face

60. 160 extension tube

62 connecting pipe part

311a front end suction port

Claims

1. A brush suction nozzle for an electric vacuum cleaner, comprising:

a nozzle body having a nozzle opening; a swing brush which is swingably attached to the vicinity of the nozzle opening of the nozzle body and has a brush surface which is in contact with a surface to be cleaned; and a biasing member that biases the oscillating brush in a predetermined direction;

2. The brush nozzle according to claim 1, wherein said nozzle body has a connection port on an opposite side of said nozzle opening,

3. The brush nozzle of claim 2, wherein the nozzle body comprises: a connecting tube portion having the connecting port; a brush support portion having a pair of shaft portions that swingably support the swing brush and the nozzle opening; a brush holder portion provided along a part of an outer peripheral portion of the nozzle opening; and an auxiliary brush part provided on the brush stage part,

the oscillating brush has: a brush base material formed in a substantially U-shape along the other portion of the outer peripheral portion of the nozzle opening of the nozzle body and having both end portions pivotally connected to the pair of shaft portions; and a plurality of bristle bundles implanted on the brush base material.

4. The brush nozzle of any of claims 2-3, further comprising: a terminal portion cover which is swingably attached to an inner surface of the nozzle opening of the nozzle body; and a terminal cover biasing member for biasing the terminal cover in a direction of lifting the terminal cover;

the terminal portion cover has a concave curved surface portion that receives an outer surface of a connecting tube portion of the other connecting tool inserted into the nozzle opening of the nozzle body to be connected with the one connecting tool.

5. The brush nozzle according to claim 4, wherein said terminal portion cover has a smooth surface portion on a back surface of said concave curved surface portion.

6. An electric vacuum cleaner, comprising:

a cleaner main body; an extension pipe which can be connected with the cleaner main body; the brush nozzle of any one of claims 1-5, connectable to the extension tube; and a suction port body having a connection pipe portion inserted into the brush suction nozzle and connectable to the extension pipe.