JPH11206639A - Electric vacuum cleaner and its suction port body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body of an electric vacuum cleaner which enables increase of a torque of a rotary cleaning body without lowering the suction efficiency of dust. SOLUTION: A rotary cleaning body 51 is rotatably pivoted facing a suction port 28 in a case body 24 with the suction port 28 opened in the undersurface thereof. A pair of suction ports 60 and 60 are opened and formed almost symmetrically on the front part opposite to a communication pipe 47 fixed almost at the center of the rear part connected to a cleaner body of the case body 24 being positioned on both end part sides in the horizontal direction. The center of a rotating shaft of the rotary cleaning body 51 is not positioned on a straight line aligning the center of the suction port 60 and the center of the cross section of an opening of a link pipe part 35 on which the communication pipe 47 is pivoted through a joint part 48. The suction port 60 and the communication pipe 47 are arranged being positioned above a plane on the same side in the horizontal direction containing the center of the rotating shaft of the rotary cleaning body 51. Thus, the suction flow from the suction ports 60 and 60 is kept from flowing to both sides of the center of the rotating shaft of the rotary cleaning body 51 and the almost total amount thereof is blown in one direction to the outer circumference side deviated from the center of the rotating shaft of the rotary cleaning body 51 thereby efficiently increasing the torque of the rotary cleaning body 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner provided with a rotary cleaning body which rotates by an intake air flow, and a suction port body thereof.

[0002]

2. Description of the Related Art Conventionally, as a suction port of this type of vacuum cleaner, for example, the configuration described in Japanese Patent Application Laid-Open No. 9-28630 is known.

[0003] The suction opening of the vacuum cleaner described in Japanese Patent Application Laid-Open No. 9-28630 has a rotatable cleaning body rotatably housed in a case body having an opening on the lower surface. In this rotary cleaning body, an axial air turbine is integrally provided coaxially at both ends in the axial direction, and the axial air turbine is rotated by the intake air from the intake ports opened at the rear ends of the case body. At the same time, the rotary cleaning body rotates to scrape dust on the floor surface and suck the dust from the suction port.

[0004]

However, in the suction port of the conventional vacuum cleaner described in Japanese Patent Application Laid-Open No. 9-28630, since the rotary cleaning member is rotated by the rotation of the axial air turbine, the suction is reduced. The weight and size of the mouth cannot be reduced, and dust on the lower surface corresponding to the axial air turbine cannot be scraped off.

[0005] Therefore, the rotary cleaning body is extended to a position facing the intake port instead of the axial air turbine, and the rotary cleaning body is rotated by directly blowing the intake air flow from the intake port to the rotary cleaning body. A configuration that eliminates the need for a flowing air turbine and reduces the area that cannot be cleaned by the rotary cleaning body is conceivable.

However, simply blowing the intake air stream directly onto the rotary cleaning body may not increase the torque of the rotary cleaning body and may not be able to efficiently remove dust. Also,
If the opening area of the air inlet is increased to increase the air flow from the air inlet to increase the torque, the air flow from the air inlet is relatively reduced, and the dust suction efficiency may be reduced. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a vacuum cleaner in which the torque of the rotary cleaning body increases without reducing the dust suction efficiency, and a suction port body thereof. .

[0008]

According to a first aspect of the present invention, there is provided a vacuum cleaner having a case body having a suction port opened on a lower surface facing a surface to be cleaned and a suction port, and a case body having a suction port. A communication pipe provided to communicate with the suction port and the suction port, and a cleaning member for scraping the surface to be cleaned is provided, and the cleaning member is rotatably provided on the case body and receives an intake flow from the suction port. And a rotating cleaning body that rotates by rotating the rotating cleaning body.
It is located at a position deviated from a straight line connecting the center of the intake port and the center of the opening cross section of the communication pipe.

The rotation axis is located at a position deviated from a straight line connecting an intake port for supplying the intake air flow to the rotary cleaning body and rotating the same, and a center of an opening cross section of the intake port and a communication pipe communicating with the intake port. In other words, in order to rotatably provide the rotary cleaning body so that the rotation axis is not located on the same straight line as the two centers, a state is obtained in which the intake air suctioned from the intake port is blown to the outer peripheral side of the rotary cleaning body, The intake air flow is efficiently blown to the cleaning member, and the torque of the rotary cleaning body increases,
Cleaning efficiency is improved.

[0010] The suction opening of the vacuum cleaner according to claim 2 is
The suction port body of the vacuum cleaner according to claim 1, wherein the communication pipe and the suction port are respectively provided on the same plane side with respect to a horizontal plane including the rotation axis of the rotary cleaning body. Things.

Since the communication pipe and the suction port are provided on the same plane with respect to a horizontal plane including the rotation axis of the rotary cleaning body, the flow of air from the suction port is reduced by the rotary cleaning body. To prevent flow on both sides of the axis of rotation of
The entire suction flow is efficiently blown to the cleaning member so as to rotate the rotary cleaning body in one direction, and the torque of the rotary cleaning body increases efficiently.

The suction body of the vacuum cleaner according to claim 3 is
3. The suction port body of the vacuum cleaner according to claim 1, wherein the communication pipe and the suction port are provided above the horizontal plane including the rotation axis of the rotary cleaning body, respectively. Things.

Since the communication pipe and the suction port are provided above the horizontal plane including the rotation axis of the rotary cleaning body, the case body is pressed against the surface to be cleaned and the rotary cleaning body is pressed. When the case body moves up the dust body, the rotating cleaning body rotates in the reverse direction when the case body moves forward, so that the rotating cleaning body efficiently scrapes the dust.

According to a fourth aspect of the present invention, there is provided a vacuum cleaner comprising a suction port of the vacuum cleaner according to any one of the first to third aspects, and a cleaner main body to which the suction port is connected. .

The vacuum cleaner according to any one of claims 1 to 3, wherein the torque of the rotary cleaning body is increased and the cleaning efficiency is improved without reducing the dust suction efficiency. Workability is improved.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention;

In FIG. 12, reference numeral 1 denotes a cleaner main body. The cleaner main body 1 includes a lower body case 2a having an open upper surface and an upper body case 2b for closing the rear upper surface of the lower body case 2a. And a main body case 2 having a front upper surface opened by being joined to and sandwiching a bumper 3 at a peripheral edge including the above. The cleaner body 1 rotatably supports a lid 4 that closes the upper surface of the front side of the body case 2 so as to be openable and closable.

The main body case 2 is provided with a rotatable swivel wheel (not shown) on the front lower surface in the traveling direction, and a large-diameter driven wheel 6 is rotatably provided on the rear side surface of the main body case 2. The main body 1 can travel on a floor surface to be cleaned with the turning wheel and the driven wheel 6. Further, a handle 7 slidable in a vertical direction is provided at an upper portion of the main body case 2.

In the cleaner body 1, an electric blower chamber for accommodating an electric blower (not shown) is formed on the rear side, and communicates with the suction side of the electric blower and is open at the top to open the lid 4. A dust-collecting chamber that is opened and closed with a dust-collecting filter is formed on the front side. Further, on the front side of the cleaner body 1, there is formed a connection port 9 which opens toward the dust collection chamber and to which a hose 8 is detachably connected.

The hose 8 has a flexible hose body 11.
A connection pipe 12 provided at one end of the hose body 11 and removably inserted and connected to the connection port 9 of the cleaner body 1;
A grip 15 is provided at the other end of the hose body 11 and is connected to a suction port body 14 via an extension pipe 13. The grip 15 is provided with operating means 17 having various switches 16, 16 for setting and operating the driving state of the electric blower.

On the other hand, as shown in FIGS. 1 to 5, the suction port main body 14 is horizontally long in the running direction and has a lower case made of a synthetic resin such as acrylonitrile-butadiene-styrene (ABS). 21 and this lower case
An upper case 22 covering the upper opening at the upper part of the upper part 21 and opening the lower surface of the same material is joined and fixed by sandwiching a buffer member 23 of a soft member along a peripheral surface including a front surface of the lower case 21 and the upper case 22. In addition, the rear case has a convex case body 24 having a substantially central rear portion protruding rearward.

The lower case 21 has a rib 25 substantially vertically on the upper surface, and the case body 24 has a horizontally elongated rectangular suction portion 26 formed by the rib 25 and a pair of shafts protruding rearward substantially at the rear center of the suction portion 26. The support portions 27 are formed in a convex shape. Further, a suction port 28 also serving as a leak port is formed on the lower surface of the suction section 26 of the lower case 21, and a suction chamber 29 is formed inside the suction section 26.

The upper case 22 covers a top surface of the suction chamber 29 and is detachably attached to the lower case 21. The case cover 31 has a substantially semicircular cross section, and a part of the case cover 31 overlaps with the case cover 31. Case cover 32 covering the rear upper surface of lower case 21
It is composed of The case cover 32 covers a part of the rear upper surface of the lower case 21 and forms a shaft support 27. The cover 33 is provided on the cover 33 in series and has a circular shape with the same curvature as the case cover 31. A reinforcing plate portion 34 which is formed in an arc shape and a part of the case lid portion 31 overlaps and covers a substantially central portion of a rear portion of the suction chamber 29, and is located between a pair of shaft support portions 27 and 27 at a substantially central portion of the reinforcing plate portion 34 and is located rearward. And a connecting pipe portion 35 protruding in a substantially cylindrical shape and communicating with the suction chamber 29. The connecting pipe 35 is provided so that the axial direction is substantially horizontal and along the front-back direction.

Further, on both ends of the front part of the lower case 21,
A driven front wheel chamber 37 in which the driven front wheel 36 is rotatably supported is formed. Further, a pair of shaft support portions 27, 27 of the lower case 21 are provided.
, A driven rear wheel chamber 39 in which a driven rear wheel 38 is rotatably supported is formed. The driven rear wheel 38 is provided with a protection sheet (not shown) which is a flexible member such as cloth or an elastic member such as rubber on the outer peripheral surface. And the case body
Reference numeral 24 allows the driven front wheel 36 and the driven rear wheel 38 to travel on a floor surface to be cleaned.

On the other hand, on the inner surface near the front edge of the lower case 21, a pair of locking recesses (not shown) which are concave toward the suction chamber 29 are provided. On the front side edge of the case lid portion 31, a locking claw portion 41 which can be engaged with and disengaged from the locking concave portion of the lower case 21 is provided so as to project therefrom. Further, sliders 42 slidable in the left-right direction are provided at both rear edges of the case cover 31 in the left-right direction, and hook claws 43 are projected from the sliders 42, respectively. Also, the reinforcing plate of the case cover 32
Tongue pieces 44 projecting in the left and right directions are integrally provided on both side edges in the left and right direction of the tongue 34, and the tip ends of these tongue pieces 44 protrude toward the suction chamber 29 in a substantially L-shaped cross-section. Part 31
A key portion 45 is provided so that the hooking claw portion 43 of the slider 42 can be disengaged. Then, by the sliding movement of the slider 42,
The case cover 31 is detachably attached to a case cover 32 that is joined and fixed to the lower case 21.

In the center of the rear part of the case body 24, a communication pipe 47 is disposed between the pair of shaft supports 27, 27.
The communication pipe 47 is connected to a joint 48 rotatably fitted to the connection pipe 35 of the case cover 32 of the upper case 22, and has one end connected to the connection pipe 35 so that the other end is rotatable vertically. It is pivoted. The communication pipe 47 is detachably connected to the cleaner main body 1 via the extension pipe 13 and the hose 8, and the suction port 28 communicates with the connection port 9 of the cleaner main body 1.

Further, a rotary cleaning body 51 rotatably supported by bearings 50 provided at both ends in the left-right direction of the suction chamber 29 is disposed in the case body 24. The rotary cleaning body 51 includes a shaft 52, a shaft support member 53 rotatably provided at both ends of the shaft 52 and removably attached to the bearing 50, a cylindrical portion 54 fitted to the shaft 52, and A blade as a cleaning member integrally provided in a wall shape and spiral shape on the outer peripheral surface of the cylindrical portion 54 and having a tip end curved to one side.
And a blade portion 56 having a blade 55. In addition,
3 and 4 show the blade 55 in a straight line for convenience of explanation. The bearing members 53, 53 have different sizes, and the bearings 50, 50 can be disengaged only from the predetermined bearing members 53, 53. In addition, a hitting portion 57 which bulges to a side opposite to the bending direction and has a large thickness is provided at a leading edge of the blade 55.

In the rotary cleaning body 51, the upper blades 55 are bent toward the front side of the case body 24 in a state where the shaft supporting members 53 at both ends of the shaft 52 are mounted on the bearings 50, so that the rotation axis is adjusted. The horizontal plane A is disposed below the plane B including the central axis of the connecting pipe portion 35 that supports the communication pipe 47. Further, in the rotary cleaning body 51, the distance C between the outer peripheral edge and the front side edge of the suction port 28 is equal to the distance D between the outer peripheral edge and the inner surface of the suction chamber 29.
It is arranged with wider dimensions. And the rotary cleaning body 51
The driven front wheel 36 and the driven rear wheel 36
The blade 55 is disposed so as to be in contact with the carpet, which is located above the plane formed at 38 and does not contact between the flat floor surfaces of the plate and enters the suction port 28 without unevenness, and enters the suction port 28. You.

The reinforcing plate portion 34 of the case cover portion 32 of the case body 24 is configured such that the rotary cleaning body 51 can be detachably attached to the upper surface of the case body 24 from which the case lid portion 31 is removed. 21 is formed so as to cover only a part of the upper surface. In addition, the suction chamber of the case cover 32 and the case lid 31 is provided.
The inner surface facing 29 is formed in an arc shape so as to be equidistant along the outer periphery of the rotary cleaning body 51.

Further, on the front surface of the upper case 22, a pair of intake ports are located at both ends in the left-right direction so that the portion facing the communication pipe 47 is closed, that is, so as not to face the communication pipe 47. The openings 60 are formed substantially symmetrically with the center where the communication pipe 47 is located as the center of symmetry. Then, on the inner edge of the lower end of the intake port 60, substantially upward of the suction chamber 29,
That is, the intake air flow, which is the flow of the air taken in from the intake port 60, collides with the tip edge portion of the blade 55, which is the outermost periphery of the rotary cleaning body 51, along the inner surface of the case lid portion 31 of the upper case 22, and is blown. A rectifying plate 62 that forms an intake air passage 61 that rectifies the air flow is provided. In addition, the rectifying plate 62 is provided so that the intake air path 61 is located on the downstream side of the intake air path 61 from the opening area of the intake port 60, which is the opening area as the air path cross-sectional area on the upstream side of the intake air path 61. It is provided so as to be formed in a trumpet shape in which the opening area which is the area is smaller.

The intake ports 60 are connected to the communication pipe 47 at the joint portion.
A rotary cleaning body is formed on a straight line that connects the center of the opening of the connecting pipe portion 35 that is pivotally supported through the opening 48 to the suction chamber 29 side and the center of the suction port 60.
The rotation axis of the rotary cleaning body 51 is not located above the same side as the side where the plane B along the horizontal direction including the axis of the connecting pipe portion 35 is located, that is, the horizontal axis including the rotation axis of the rotary cleaning body 51. A horizontal plane B including the center of the intake port 60 and the axis of the connecting pipe 35 is located above the plane A, and an opening is formed above the plane A. In addition, the intake ports 60, 60 have a pair of total opening areas of the intake ports.
An opening is formed to have an area smaller than the opening area of 28. Further, the intake ports 60, 60 are on the opposite side of the communication pipe 47,
That is, an opening is formed on the front side of the substantially vertical direction passing through the rotation axis of the rotary cleaning body 51 and on the front side of the front end of the rotation radius of the rotary cleaning body 51.

Further, a suction port 28 is provided on the lower surface of the lower case 21.
Are provided at both ends in the left-right direction of the case body and communicate with the outside of the case body 24 and the suction port 28 in the form of concave grooves. Each of the communication grooves 64 has a front surface in the front-rear direction, and a vertical plane E including the rotation axis of the rotary cleaning body 51.
It is provided at a more rearward position.

Further, on the lower surface of the lower case 21, as shown in FIG. 1 to FIG. A cleaning body 66 is detachably mounted in the storage recess 65.

Bearing portions 67, 67 are provided on both end surfaces in the longitudinal direction, which is the left-right direction, of the storage recess 65, the lower end edges of which are cut out in an arcuate concave shape. In addition, storage recess 65
On the top surface, there is a groove-like step recess along the rear edge.
68 are provided. The stepped recess 68 is provided such that the front side edge is located behind the center of the storage recess 65 in the front-rear direction. Further, in the vicinity of the front and rear opening edges of the storage recess 65, a plurality of claw portions 69 projecting inward in a zigzag manner with their tips not facing each other are provided.

Further, the cleaning body 66 has a substantially elongated plate-shaped pedestal 71.
have. The pedestal portion 71 is a member that can be elastically deformed and has a claw portion in the front-rear direction of the storage concave portion 65 having a width dimension.
It is formed wider than the distance between 69 and 69. A substantially columnar shaft portion 72 that protrudes along the longitudinal direction and that is rotatably supported by the bearing portion 67 of the storage recess 65 is integrally provided at both ends in the longitudinal direction. As shown in FIG. 11, the pedestal portion 71 has a storage recess in which the front upper edge is the lower surface of the case body 24.
10 and the rear lower edge abuts on the claw portion 69 and the front lower edge abuts on the claw portion 69. As shown in FIG. In the rear rotation in which the front lower edge is in contact with the ceiling surface and the front lower edge is in contact with the claw portion 69 and the rotation is restricted, the shaft is pivotally supported so that the rotation angle of the rear rotation is increased. The pedestal
The 71 does not project from the lower surface of the lower case 21 even when rotated.

Further, on the upper surface of the pedestal portion 71, a projection 73 is formed integrally with the outer peripheral surface of the shaft portion 72 and protrudes in a wall shape along the longitudinal direction in an arc shape having substantially the same curvature. ing. The outer periphery of the protrusion 73 is always slidably abutted against the ceiling surface of the storage recess 65, and when the pedestal 71 rotates, the contact position changes and slides on the ceiling surface of the storage recess 65. It is formed so as to protrude.

The lower surface of the pedestal portion 71 is formed in an arc shape in the front-rear direction, which is the direction of rotation, with a curvature larger than the curvature of the arc about the rotation axis, which is the center axis of the shaft portion 72. .
That is, the shaft portion 72 is provided such that the rotation axis of the pedestal portion 71 is shifted from the center corresponding to the curvature of the lower surface of the pedestal portion 71 to a position closer to the lower surface side of the pedestal portion 71. Further, as shown in FIG. 9, at both ends of the lower surface of the pedestal 71, there are provided end mounting recesses 74, which are recessed downward and have a central edge of the pedestal 71 inclined toward the center. In addition, on both sides of the lower surface of the pedestal portion 71, there are provided edge mounting concave portions 75 which are concave portions extending downward along the edges and continuous with the end mounting concave portions 74.

On the lower surface of the pedestal 71, a raised cloth 77, which is a wiping member having raised brushes 76, is attached. The raised cloth 77 is attached by, for example, an adhesive or the like in a state in which the raised edges are located at the end mounting recesses 74 and the edge mounting recesses 75, respectively, and the raised brushes 76 are planted substantially perpendicularly to the lower surface of the pedestal 71. , A cleaning body 66 is formed. The cleaning body 66 has a flat surface formed by the driven front wheel 36 and the driven rear wheel 38, in which the pedestal portion 71 does not protrude downward from the lower surface of the case body 24, and the leading end of the raised brush 76 protrudes from the lower surface of the case body 24. The raised end 76 is positioned so as to be in contact with the plate that is a flat floor surface without rotating.

Next, the operation of the above embodiment will be described.

At the time of cleaning, the suction body 14 is connected to the cleaner body 1 via the extension pipe 13 and the hose 8, and the hose 8
The suction port main body 14 is moved forward and backward on the floor surface by pushing and holding the grip portion 15.

Then, by the suction force generated by driving the electric blower of the cleaner body 1, the air is sucked from the suction ports 60, 60 and also from the suction port 28. Here, since the suction port body 14 is placed on the floor surface, the resistance of the air passage from the outside air to the suction chamber 29 from the suction ports 60, 60 passes through the lower surface of the case body 24 from outside. From suction port 28 to suction chamber 29
It is smaller than the resistance of the air path leading to the inside. For this reason, the intake port 60, 60
There is a tendency for the amount of intake air from the air to increase.

Furthermore, when the floor surface is a carpet such as a carpet, which has a particularly long bristle foot, the bristle foot enters the suction chamber 29 from the suction port 28, so that the amount of intake air from the suction ports 60, 60 is further reduced. Increase.

The air sucked from the air inlets 60, 60 flows into the suction chamber 29 through the air intake passage 61 while being rectified by the rectifying plate 62, and comes into contact with the blade 55 of the rotary cleaning body 51. Then, the rotary cleaning body 51 is rotated to reach the connecting pipe portion 35.

Here, the intake air flow from the intake port 60 rotates substantially perpendicularly to the axial direction of the rotary cleaning body 51 in the intake air path 61, that is, linearly rotates along the traveling direction of the intake port body 14. After being sprayed on the cleaning body 51, it flows so as to gather toward the center of the case body 24 along the axial direction of the rotary cleaning body 51 and flows to the communication pipe 47, so that the intake air acts on the rotary cleaning body 51. As the distance increases and the rotational torque increases, the suction flow is
Since the amount of suction from 28 is not reduced, dust is efficiently sucked. The suction port 60 is formed on the opposite side of the communication pipe 47, that is, on the front side of the substantially vertical direction passing through the rotation axis of the rotary cleaning body 51, and further on the front side of the front end of the rotation radius of the rotary cleaning body 51. Therefore, since the intake air flow acts on the rotary cleaning body 51 for a long time, the rotational torque further increases.

Further, dust on the floor surface is sucked from the suction port 28 through the lower surface of the case body 24.

The air sucked together with the dust through the communication grooves 64, 64 becomes a suction flow along the axial direction of the rotary cleaning body 51. Further, the blade 55 is provided in a spiral shape, and its curved surface intersects the axial direction of the rotary cleaning body 51. For this reason, the suction flow from the communication groove 64 on the right side in the traveling direction, which is one side,
Of the blade 55, and a force acts in the rotation direction of the rotary cleaning body 51. The suction flow from the communication groove 64 on the left side in the traveling direction, which is the other side, is blown onto the curved surface of the rotating cleaning body 51 opposite to the curved side of the blade 55, and is guided along the curved surface of the blade 55. The rotating cleaning body 51 is in a state in which the rotating cleaning body 51 is hardly applied. Therefore, the suction flow from the communication groove 64 also contributes to the rotation of the rotary cleaning body 51.

When the rotating cleaning body 51 rotates, when the floor surface is a carpet or the like, the hitting portion 57 of the blade 55 collides with the floor surface to strike out the dust and to scrape or sweep it out to suck in dust. Inhale through mouth 28.

Here, a part of the air containing the dust sucked into the suction chamber 29 reaches the connecting pipe portion 35 via the interval D between the rotary cleaning body 51 and the lower case 21, but the rotary cleaning body 51 Are rotating and the spacing C is wide, so most of them are
Through the front side, the air flows into the connecting pipe 35 together with the intake air so as to be pushed out along the rotation direction of 51. The sucked dust flows through the extension pipe 13 and the hose 8 into the dust collection chamber of the cleaner body 1 and is captured.

When the suction port body 14 moves forward during cleaning, the cleaning body 66 in contact with the floor is rotated rearward as shown in FIG. It comes into contact with the floor surface, and the dust on the floor surface is wiped off at the contact portion.
Further, when the suction port main body 14 is retracted, the cleaning body 66 in contact with the floor surface is rotated forward as shown in FIG. 11, and the rear edge portion of the raised cloth 77 of the cleaning body 66 comes into contact with the floor surface. Wipe off any dust on the floor where it comes into contact. In addition, the raising of the raising cloth 77
Since 76 is substantially perpendicular to the arc-shaped lower surface of the attached pedestal portion 71, it is in a straight-line state inclined with respect to the floor surface in the rotated state. In other words, the front end of the brushed portion 76 extends forward when the rearward rotation is performed at the time of forward movement, and the front end portion of the brushed 76 extends forward when the front rotation is performed at the time of retreating. For this reason, by rubbing and sweeping the dust on the floor, the frictional resistance with the floor is reduced regardless of the running direction of the suction port main body 14, and the dust is wiped off with a light running feeling.

Further, the suction port main body 14 is moved from forward movement to backward movement.
When the traveling direction is switched, since the cleaning body 66 is in the forward turning state in the state of being rotated backward, the brushed 76 is in the reverse state in the retreating state, and the floor surface and the cleaning body 66 Frictional resistance increases. For this reason, the cleaning body 66 rotates forward as it travels rearward and returns to the normal state again. Similarly, when the traveling direction is switched from the time of retreat to the time of forward movement, the cleaning body 66 is similarly rotated backward to be in the normal state.

When the traveling direction is switched from the backward movement to the forward movement, the suction port main body 14 is located in a state of approaching the worker, and the end of the communication pipe 47 is turned up to the upright state. By pushing for forward movement in the state, the suction port body
14 is pressed against the floor. For this reason, in the case where the suction port main body 14 is lifted by the pulling and the state where the suction port body 14 is lifted and the state where the suction port body 14 is moved backward is changed, the direction of the case where the suction port body 14 is switched from the time of retreat to the time of forward movement becomes stronger when the floor surface and the cleaning body 66 are crimped. As a result, the frictional resistance increases. By the way, the cleaning body
For 66, since the turning angle is larger when turning backward when moving forward,
When the cleaning body 66 is rotated until the rotation is restricted, it is switched from the backward movement to the forward movement and the forward movement distance is increased.

Accordingly, the cleaning body 66 is rotated in the same manner as the driving assistance by the rotation of the driven front wheel 36 and the driven rear wheel 38, so that the suction port main body 14 is in contact with the floor surface until the cleaning body 66 is restricted. The cleaning body 66 that rotates without any frictional members assists the running of the suction port body 14, and provides a light running feeling even when switching from retreating to moving forward when pressed against the floor surface, improving running performance. Cleaning work becomes easier.

On the other hand, when the lower surface of the suction port main body 14 is separated from the floor surface to move furniture and the like, or to move a cleaning place, the opening area becomes large and an air passage to the suction chamber 29 is formed. The airflow resistance from the suction port 28 that is not
Since it becomes smaller than the wind path resistance taken from 60, the suction port
As the volume of air suctioned from 28 increases,
The air volume taken from 60,60 decreases. For this reason, the intake air blown to the rotary cleaning body 51 is weakened, and the rotary cleaning body 51 is rotated.
The rotation speed of 51 is greatly reduced.

After the cleaning is completed, the rotary cleaning member 51 is used to remove lint, hair, and the like entangled with the rotary cleaning member 51.
When removing 51, the slider 42 is slid and moved to remove the case cover 31, and is attached and detached from the upper surface of the case body 24 that is opened. In addition, when mounting, it mounts by operation opposite to removal operation.

When dust adheres to the cleaning body 66 and becomes dirty, the intermediate portion of the pedestal 71 is elastically deformed so that the claw 69,
By passing through the space 69, the shaft portions 72, 72 are removed from the bearing portions 67, 67, respectively, so that the shaft portions 72, 72 are removed from the storage recess 65 and washed. In addition, when mounting, it mounts by operation opposite to removal operation.

As described above, the blade of the rotary cleaning body 51
The rotary cleaning body is arranged so that the rotation axis is not located on a straight line connecting the intake port 60 for supplying the intake air flow to the inlet 55 for rotation and the center of the opening cross section of the suction port 28 and the communication pipe 47 communicating with the intake port 60.
Since the rotation 51 is provided rotatably, the intake air sucked from the intake port 60 is blown to the outer peripheral side shifted from the rotation axis of the rotary cleaning body 51, and the intake air is efficiently blown and the torque of the rotary cleaning body 51 is increased. And the cleaning efficiency can be improved.

Further, since the communication pipe 47 and the suction port 60 are respectively provided on the same plane side with respect to a plane A extending in the horizontal direction including the rotation axis of the rotary cleaning body 51, the suction from the suction port 60 is provided. The entire amount of the flow is located on the outer peripheral side of the rotary cleaning body 51.
Is efficiently blown without flowing in the direction opposite to the rotational direction of the rotary cleaning member 51, and the torque of the rotary cleaning body 51 can be efficiently increased.

Further, the communication pipe 47 and the intake port 60
Are provided above the respective planes A along the horizontal direction including the rotation axis of the rotary cleaning body 51, so that a load is applied in which the rotation direction of the rotary cleaning body 51 is pressed against the floor surface. The suction port body 14 rotates in the reverse direction with respect to the traveling direction at the time of forward movement, and the rotating cleaning body 51 can efficiently hit the floor surface by the load pressed against the floor surface, thereby improving the dust removal efficiency.

Further, an intake port 60 for supplying and rotating an intake air flow to the blade 55 of the rotary cleaning body 51 is provided at a position not facing the communication pipe, and a portion facing the communication pipe 47 is closed. After being sprayed linearly on the rotary cleaning body 51 along the traveling direction of the suction port main body 14, the communication pipe 47 flows so as to gather toward the center of the case body 24 along the axial direction of the rotary cleaning body 51. Flow, and the air is not directly sucked into the communication pipe 47 in a straight line, so that the distance that the air flow acts on the rotary cleaning body 51 is increased, so that the rotational torque can be increased. Therefore, the amount of suction from the suction port 28 is not reduced, so that dust can be sucked in efficiently and the cleaning efficiency can be improved. Further, since the air volume balance can be secured without reducing the suction volume from the suction port 28, for example, the intake area such as reducing the opening area of the intake port 60 and suppressing the intake volume from the intake port 60 to secure the air volume balance. A configuration for regulating the inflow speed from the port 60 is not required, and by regulating the inflow speed, turbulence is generated, and generation of noise due to the turbulence can be prevented.

Further, separate members such as an electric motor and an air turbine for rotationally driving the rotary cleaning body 51 are not required, so that the size and weight can be reduced, and the area where the lower surface of the suction port main body 14 cannot be cleaned can be reduced, thereby improving the cleaning efficiency. it can.

The suction port 60 has an opening formed on the opposite side of the communication pipe 47, that is, on the front side of a substantially vertical direction passing through the rotation axis of the rotary cleaning body 51, and further on the front side of the front end of the rotation radius of the rotary cleaning body 51. Therefore, the intake air flow can act on the rotary cleaning body 51 for a long time, and the rotational torque can be further increased.

Further, since the intake port 60 is formed with a pair of openings symmetrically with respect to the center of the case body 24, the appearance can be improved, and the intake flow can be supplied to the rotary cleaning body 51 substantially uniformly over substantially the entire area in the longitudinal direction. The body 51 can be stably and efficiently rotated, and the dust scraping property can be improved.

Further, a rectifying plate 62 is provided at an intake port 60 for supplying the intake air flow to the rotary cleaning body 51 to rotate the rotary cleaning body 51, and the intake air passage 61 is formed so as to blow the outermost circumference of the rotary cleaning body 51. The flow is blown to the rotary cleaning body 51, so that the torque of the rotary cleaning body 51 can be improved, and the cleaning performance can be improved.

Further, since the intake air passage 61 formed by the rectifying plate 62 is formed in a trumpet shape having a smaller opening area on the downstream side, the intake air flow can be narrowed down without generating noise due to turbulence, and the intake air flow can be reduced. As the wind speed increases, the force of blowing to the rotary cleaning body 51 can be increased, and the torque of the rotary cleaning body 51 can be increased to improve the cleaning performance.

Since the rectifying plate 62 is provided inside from the air inlet 60, the rectifying plate 62 does not protrude to the outside of the case body 24, so that the appearance can be improved, and the rectifying plate 62 collides with furniture or the like during cleaning. For example, it is possible to prevent the cleaning work from being hindered, and it is possible to prevent generation of noise due to turbulence generated by providing the protruding portion.

On the other hand, the cleaning body 66 having a raised cloth 77 attached to the lower surface of the pedestal portion 71 is pivoted at a predetermined angle so that the axial direction is along a direction intersecting the running direction of the suction port main body 14. Since the cleaning body 66 rotates in the same manner as the driven front wheel 36 and the driven rear wheel 38 at the time of reversing, which is the switching of the running direction of the suction port main body 14 back and forth, the running is assisted and the running performance can be improved. , Cleaning work becomes easy.

Further, since the cleaning body 66 is rotated to make a portion in contact with the floor surface different, that is, the dust is wiped off at the portion of the brushing cloth 77 in the running direction, so that the brushing cloth 77 is locally damaged. Can be prevented, and the life of the cleaning body 66 can be improved.

Further, since the rotation of the cleaning body 66 is restricted to a predetermined angle, the structure of the suction port body 14 is simpler than that of the conventional cleaning body which rotates in the form of a roller. Dust can be reliably wiped off from the floor during traveling to improve the cleaning efficiency, and the cleaning body 66 has a semicircular cross-section and can be reduced in size, and the storage recess 65 as an installation space can also be reduced in size.

The cleaning body 66 is deflected to the lower surface of the pedestal portion 71 formed in an arc shape having a curvature larger than the curvature about the rotation axis, that is, to a position where the rotation axis approaches the lower surface. The raised cloth 77 is provided on the lower surface of the pedestal portion 71 formed so that the raised brush 76 extends substantially perpendicularly to the lower surface, so that the suction port main body 14 travels on the floor surface and the pedestal portion 71 rotates. At this time, the raised brushes 76 are inclined with respect to the floor surface in a sequential state in which the tips extend in the opposite direction to the running direction, so that the raised brushes 76 are stroked on the floor surface and the floor while the suction port body 14 is running. The frictional resistance between the surface and the cleaning body 66 is reduced, and the traveling performance can be improved. Further, since there is no directionality of the cleaning body 66, a structure for preventing erroneous attachment to the case body 24 is unnecessary, and the structure can be simplified.

Further, the cleaning body 66 is inserted into the housing recess of the case body 24.
Since the raised cloth 77 is rotatably housed in the 65 so that only the raised cloth 77 protrudes from the lower surface of the case body 24, damage to the floor surface and the cleaning body 66 due to contact between the floor surface and the pedestal portion 71 can be prevented.

Further, a pedestal portion 71 formed to be elongated in the axial direction.
The upper surface of the cleaning member 66 is provided with a projection 73 whose tip is in contact with the ceiling surface of the storage recess 65 which is the lower surface of the case body 24 at substantially the same curvature as the curvature about the rotation axis of the base 71. Even when a force that is pushed up from the floor surface due to contact with the floor surface is applied, the cleaning body 66 rotates at the position supported by the case body 24 and the projection 73 that contacts the lower surface of the case body 24 with a small area. Since the deformation of the cleaning body 66 can be prevented without impairing the movement, the dust can be wiped off in the entire area of the cleaning body 66 in the axial direction, and the cleaning body 66 can be cleaned.
The damage such as breakage of 66 can be prevented.

Claw portions 69, 69 which are provided on the lower surface of the case body 24 and project downward from the cleaning body 66 toward the cleaning body 66 and regulate the rotation of the cleaning body 66 within a predetermined angle range. With the provision, the rotation can be restricted and the cleaning body 66 provided on the lower surface of the case body 24 can be prevented from falling off with a simple structure.

Further, since the claws 69, 69 are provided in a staggered manner and the pedestal 71 is formed of a material which can be elastically deformed, the cleaning member 66 is formed.
Can be easily attached and detached.

Also, since the end mounting recess 74 and the edge mounting recess 75 for burying the periphery of the brushed cloth 77 are provided in the pedestal section 71, contact and friction between the brushed cloth 77 and the floor surface cause the brushed cloth 77 to be removed from the periphery. It is possible to prevent the cleaning body 66 from being peeled and damaged.

Then, the elongated cleaning body 66 is inserted into the suction port main body 14.
Because it is arranged in almost the entire area along the left and right direction of the
The airtightness of the lower surface of the battery is improved, the negative pressure is increased, and the dust suction efficiency can be improved.

Further, since the cleaning body 66 is detachable, even if the cleaning body 66 is contaminated by dust, only the cleaning body 66 needs to be cleaned.
Maintainability can be improved.

In the above embodiment, not only the canister type vacuum cleaner but also an upright type in which the suction port body 14 is formed directly on the lower surface of the vacuum cleaner body 1, etc. The present invention can also be applied to a self-propelled vacuum cleaner or the like in which the main body 14 is integrated.

Although one rotary cleaning body 51 which is rotated by being directly blown by the intake air flow is described, a plurality of rotary cleaning bodies 51 may be provided. Further, in addition to the blade 55, as the rotary cleaning body 51, a rotary brush having a raised brush in a wall shape, a cloth blade portion provided, a brush or cloth blade, any combination of the blade 55, etc. Good.

Although one cleaning element 66 is provided behind the suction port 28, the cleaning element 66 may be provided in front of the suction port 28 or a plurality of cleaning elements 66 may be provided.

Further, as the cleaning body 66, in addition to the brushed cloth 77, the same effect can be obtained even if a brush bristle is implanted directly on the pedestal 71 and has a dust scraping action such as dust scraping or sweeping. Having.

Although the raised cloth 77 is provided so that the raised 76 is substantially perpendicular to the lower surface of the pedestal portion 71, the raised cloth 77 is provided, for example, so that the tip is extended rearward with respect to the forward direction. Is also good. That is, when the suction port body 14 is pushed forward against the floor, the raised brushes 76 become more sluggish when moving forward, and the running performance is further improved, and at the time of retreating, the dust scraping action is obtained. In the case where the brush bristles or raised portions 76 are provided at an angle, it is preferable to provide a configuration for preventing the erroneous attachment to the case body 24 by, for example, changing the diameter of the shaft portions at both ends.

The cleaning body 66 may be provided directly on the lower surface of the case body 24 so as to be freely rotatable without being provided in the storage recess 65.

On the other hand, the intake port 60 has been described as being symmetrical. However, for example, in the case of using a rotary cleaning body in which the blade 55 is provided in a linear shape that is not spiral, the intake port that opens left and right is used.
The positions of 60, 60 may be displaced in the vertical direction.

In the above description, two intake ports 60 are opened at the front side in the traveling direction.
Any position may be used as long as it is not on a straight line connecting the center of 60 and the center of the cross-section of the opening of the connecting pipe portion 35 which supports the communication pipe 47 via the joint portion 48. Or a plurality may be provided.

Further, the rectifying plate 62 provided in the intake port 60 is provided inside the case cover 31 of the case body 24 so that the opening area on the downstream side of the intake air passage becomes gradually smaller. May be formed so as to protrude outside in a cylindrical shape to form an intake air passage.

In the above description, the communication pipe 47 is pivotally supported on the connecting pipe section 35 via the joint section 48. However, the communication pipe 47 is rotatably supported directly, and the communication pipe 47 is fixedly provided. The same effect can be obtained even with the above-mentioned one.

[0087]

According to the suction port of the vacuum cleaner according to the first aspect of the present invention, the cross section of the opening of the suction port for supplying and rotating the suction flow to the rotary cleaning body, and the communication pipe communicating with the suction port and the suction port. The rotary cleaning body is rotatably mounted on the same straight line connecting the center and the rotation axis so that the rotation axis is not positioned, so that the intake air sucked from the air inlet blows on the outer peripheral side shifted from the rotation axis of the rotation cleaning body. As a result, the intake air stream is efficiently blown to the cleaning member, the torque of the rotary cleaning body can be increased, and the cleaning efficiency can be improved.

According to the suction port of the vacuum cleaner according to the second aspect, in addition to the effect of the suction port of the vacuum cleaner according to the first aspect, the suction port extends along the horizontal direction including the rotation axis of the rotary cleaning body. Since the communication pipe and the intake port are provided on the same surface side with respect to the plane, almost all of the intake flow from the intake port flows to the outer peripheral side of the rotary cleaning body on both sides of the rotation axis of the rotary cleaning body. And the rotating cleaning body is efficiently sprayed so as to rotate in one direction, so that the torque of the rotating cleaning body can be efficiently increased.

According to the suction port of the vacuum cleaner according to the third aspect, in addition to the effect of the suction port of the vacuum cleaner according to the first or second aspect, in addition to the effect of the suction port in the horizontal direction including the rotation axis of the rotary cleaning body. Since the communication pipe and the air intake port are located above the plane along the case, the case body is pressed against the surface to be cleaned, and the rotating cleaning body scrapes up dust. As a result, the rotary cleaning body efficiently comes into contact with the surface to be cleaned, and the efficiency of scraping dust can be improved.

According to the electric vacuum cleaner of the present invention, the torque of the rotary cleaning body is increased without reducing the dust suction efficiency, and the cleaning efficiency is improved. Since the suction port of the machine is provided, the cleaning workability can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a suction port main body of an embodiment of a suction port body of a vacuum cleaner according to the present invention.

FIG. 2 is a plan view showing a state in which the upper case is removed.

FIG. 3 is a bottom view of the same.

FIG. 4 is a front view of the same.

FIG. 5 is a rear view of the same.

FIG. 6 is a side sectional view showing the vicinity of a cleaning body of the suction port main body;

FIG. 7 is a partially cutaway perspective view showing the same cleaning body.

FIG. 8 is a sectional view of the upper end surface.

FIG. 9 is a sectional side view of the same.

FIG. 10 is a side cross-sectional view showing the vicinity of the cleaning body of the suction port main body in a state where the cleaning body is rotated backward.

FIG. 11 is a side sectional view showing the vicinity of the cleaning body of the suction port main body in a state where the cleaning body is rotated forward.

FIG. 12 is a perspective view showing the main body of the cleaner.

[Explanation of symbols]

 1 Vacuum cleaner body 14 Suction port body 24 Case body 28 Suction port 47 Communication pipe 51 Rotary cleaning body 55 Blade as cleaning member 60 Suction port

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoshi Ishikawa 43 Horiyamashita, Hadano-shi, Kanagawa Prefecture Inside the Tec Hatano Plant (72) Inventor Ikuhiro Otsu 43 Horiyamashita, Hadano-shi, Kanagawa Tec Corporation Hadano Plant (72) Inventor Takeyuki Ichino 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tec Hatano Plant

Claims (4)

[Claims] 1. A case body having an intake port and an intake port opened on a lower surface facing a surface to be cleaned, a communication pipe provided in the case body and communicating with the suction port and the intake port, A rotary cleaning member that has a cleaning member that lifts a cleaning surface and that is rotatably provided on the case body and that rotates when the cleaning member receives an air flow from the air inlet; The suction body of the vacuum cleaner, wherein the heart is located at a position deviated from a straight line connecting a center of the air inlet and a center of an opening cross section of the communication pipe. 2. The communication pipe according to claim 1, wherein the communication pipe and the intake port are respectively provided on the same plane side with respect to a horizontal plane including the rotation axis of the rotary cleaning body.
The suction body of the vacuum cleaner described. 3. The communication pipe according to claim 1, wherein the communication pipe and the intake port are respectively provided above a horizontal plane including a rotation axis of the rotary cleaning body along a horizontal direction. Vacuum cleaner suction body. 4. A vacuum cleaner comprising: a suction port of the vacuum cleaner according to claim 1; and a cleaner main body to which the suction port is connected.