JP3503869B2 - Vacuum cleaner and its suction body - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Heretofore, as a suction inlet of an electric vacuum cleaner of this type, a structure disclosed in, for example, JP-A-9-28630 has been known.

The suction port body of the electric vacuum cleaner disclosed in Japanese Patent Application Laid-Open No. 9-28630 houses a rotary cleaning body rotatably in a case body having a suction port opened on the lower surface. In addition, this rotary cleaning body is integrally provided with axial air turbines coaxially at both ends in the axial direction. Then, the suction flow from the intake ports opening at both ends of the rear part of the case body is blown onto the axial air turbine by the nozzle to rotate the rotary cleaning body together with the axial air turbine to scrape dust on the floor surface.
The intake flow that has passed through the axial air turbine flows through a communication pipe connected to the cleaner body together with the air sucked together with dust from the suction port.

[0004]

However, in the suction port body of the conventional electric vacuum cleaner disclosed in Japanese Patent Laid-Open No. 9-28630, the rotary cleaning body rotates due to the rotational drive of the axial flow air turbine. The mouthpiece cannot be made lightweight and small, and dust on the lower surface corresponding to the axial air turbine cannot be scraped off.

Therefore, instead of the axial air turbine, the rotary cleaning body is extended to a position facing the intake port, and the intake air flow from the intake port is directly blown to the rotary cleaning body to rotate the rotary cleaning body. It is conceivable to eliminate the need for a flowing air turbine and reduce the area that cannot be cleaned by the rotary cleaning body.

However, if the intake flow is directly blown to the rotary cleaning member, the torque of the rotary cleaning member cannot be expected to increase, and the dust may not be efficiently scraped off. Also,
If the opening area of the intake port is increased to increase the intake air volume from the intake port to increase the torque, the intake air volume from the intake port may be relatively reduced, and the dust suction efficiency may be reduced. There is.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric vacuum cleaner in which the torque of a rotary cleaning body increases without reducing the suction efficiency of dust and a suction port thereof. .

[0008]

A suction port body for an electric vacuum cleaner according to claim 1 has a suction chamber on the lower surface facing the surface to be cleaned, the suction chamber opening the suction port, and the suction port communicating with the suction chamber. There is a case body that opens, a communication pipe that is provided in the case body and that communicates with the suction port and the intake port, and a cleaning member that is rotatably accommodated in the suction chamber of the case body and that scrapes up the surface to be cleaned. The intake flow from the intake port is sucked
A rotary cleaning body that rotates by being blown through an airflow path, and an inner surface of the suction chamber of the case body has a rotation radius of the rotary cleaning body at least between the intake port through which the intake flow flows and the communication pipe. Is formed in an arc shape having a substantially equal distance along the radial direction from the outer peripheral tip to the inner surface of the suction chamber, and the intake air passage has an upstream opening area.
If it is formed so that the opening area on the downstream side becomes smaller
In both cases, the downstream side is continuous with the inner surface of the suction chamber of the case body.
It is those that.

Then, the inner surface of the suction chamber of the case body that rotatably accommodates the rotary cleaning body that is rotated by blowing the intake air flow from the suction port to the cleaning member and opens the suction port on the lower surface facing the surface to be cleaned is , At least between the intake port through which the intake flow flows and the communication pipe, the arc shape is formed so that the radial distance from the outer circumferential tip of the rotation radius of the rotary cleaning body to the inner surface of the suction chamber is substantially equal. that Do a state where the intake flow from the intake port inner surface of the suction chamber becomes equal curvature to the curvature of the radius of rotation of the rotary cleaning body to the communication pipe is applied to the rotational direction of the rotary cleaning body up to the communicating pipe from the mouth Together with sucking
The air duct is formed so that the opening area is small on the downstream side.
Therefore, for example, suction without generating noise due to turbulence
Rotating cleaning body
Since the force to be applied to the rotary cleaning body can be increased and the intake air flow can efficiently contribute to the rotation of the rotary cleaning body, for example, by increasing the opening area of the intake port to increase the torque of the rotary cleaning body, the suction of dust from the suction port is increased. The efficiency of the rotary cleaning body is increased without lowering the efficiency and the cleaning efficiency is improved, and the strength of the case body is improved by the arc of the inner surface of the suction chamber, so that the assemblability and handleability are improved.

The suction port body of the electric vacuum cleaner according to claim 2 is
The suction port body of the electric vacuum cleaner according to claim 1, wherein an inner surface of the suction chamber of the case body is a radial direction between an outer peripheral tip of a radius of gyration of the rotary cleaning body and an inner surface of the suction chamber between the suction port and the suction port. Is a circular arc having a substantially equal distance.

The distance between the suction port and the suction port on the inner surface of the case body along the radial direction from the outer circumferential tip of the rotation radius of the rotary cleaning member to the inner surface of the suction chamber is substantially equal. Since it is formed in an arc shape, the inner surface of the suction chamber from the suction port to the suction port has the same curvature as the radius of gyration of the rotary cleaning body, and the suction flow sucked with dust from the suction port reaches from the suction port to the suction port. It acts in the rotation direction of the rotary cleaning body, and from the intake port to the communication pipe, it acts in the rotation direction of the rotary cleaning body together with the intake flow, and the suction flow also contributes effectively to the rotation of the rotary cleaning body. The torque of the rotary cleaning body increases.

The suction port body of the electric vacuum cleaner according to claim 3 is
In the suction port body of the electric vacuum cleaner according to claim 1 or 2, the case body includes a case lid body that defines at least a suction chamber between the intake port through which the intake flow flows and the communication pipe.

Since at least the part of the case body that defines the suction chamber between the intake port and the communication pipe through which the intake air flows is a separate case lid, the outer surface of the case lid is the same circle as the inner surface of the suction chamber. It can be easily formed in an arc shape and can easily be made smaller and lighter, and the case body that divides the suction chamber that houses the rotary cleaning body can be easily formed. The cleaning body is easy to clean, maintenance is easy, and the case body is easy to assemble.

The suction port body of the electric vacuum cleaner according to claim 4 is
The suction port body of the electric vacuum cleaner according to any one of claims 1 to 3, wherein an inner surface of the suction chamber of the case body is located at least between an intake port and a communication pipe through which an intake flow flows and an axial direction of the rotary cleaning body. Ribs are provided along the direction intersecting with.

Since the ribs are provided on the inner surface of the suction chamber of the case body at least between the intake port and the communication pipe through which the intake air flows and along the direction intersecting the axial direction of the rotary cleaning body, the strength of the case body is improved. In addition, the intake flow from the intake port is guided by the ribs and efficiently supplied to the rotary cleaning body in the direction intersecting the axial direction, and the torque of the rotary cleaning body is improved.

The suction port body of the electric vacuum cleaner according to claim 5 is:
In the suction port body of the vacuum cleaner according to any one of claims 1 to 4, the rotation radius to the outer peripheral tip of the rotary cleaning body is
This is an effective radius that is increased by the moment acting during the rotation of the rotary cleaning body.

Since the radius of gyration to the outer peripheral tip of the rotary cleaning body is set to be an approximately equal distance to the inner surface of the suction chamber as an effective radius which is increased by the moment acting when the rotary cleaning body rotates, Since the rotary cleaning body does not come into contact with the inner surface of the case body even when the rotary cleaning body whose rotation radius changes is used, deterioration of rotatability of the rotary cleaning body, noise generation and damage due to contact with the case body are prevented.

An electric vacuum cleaner according to a sixth aspect of the present invention includes the suction port body of the electric vacuum cleaner according to any one of the first to fifth aspects, and a cleaner body to which the suction port body is connected. .

Further, the torque of the rotary cleaning body is increased without lowering the dust suction efficiency to improve the cleaning efficiency, the strength is improved, and the assemblability and the handleability are improved. Since the vacuum cleaner described above is provided with the suction port body, the manufacturability, the cleaning workability, and the maintenance controllability are improved.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A configuration showing an embodiment of an electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 12, reference numeral 1 denotes a cleaner body, and the cleaner body 1 includes a lower body case 2a having an opened upper surface and an upper body case 2b for closing a rear upper surface of the lower body case 2a. There is a main body case 2 having a bumper 3 which is sandwiched and joined to a peripheral edge thereof including the front side upper surface. The cleaner body 1 pivotally supports a lid body 4 that rotatably closes the front upper surface of the body case 2.

Further, the main body case 2 is provided with a swivel wheel (not shown) which is rotatable 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 run on the floor surface, which is the surface to be cleaned, by the turning wheel and the driven wheel 6. Further, a handle 7 which is vertically slidable is provided on the upper portion of the main body case 2.

An electric blower chamber for accommodating an electric blower (not shown) is formed in the rear of the cleaner body 1, and is formed in a compartment on the rear side. The electric blower chamber communicates with the suction side of the electric blower and the upper side is opened to open the lid 4. A dust collection chamber (not shown) that is opened and closed to accommodate the dust collection filter is defined on the front side. Further, a connection port 9 is formed on the front side of the cleaner body 1 so as to face the dust collecting chamber and to which the hose 8 is detachably connected.

The hose 8 is a flexible hose body 11
And a connection pipe 12 provided at one end of the hose body 11 and detachably inserted into the connection port 9 of the cleaner body 1,
The hose body (11) is provided with the other end and is configured with a grip portion (15) to which a suction port body (14) is connected via an extension tube (13). The grip portion 15 is provided with an operating means 17 having various switches 16 and 16 for setting and operating the drive state of the electric blower.

On the other hand, as shown in FIGS. 1 to 5, the suction port body 14 is horizontally long with respect to the traveling direction and is made of a synthetic resin such as acrylonitrile-butadiene-styrene (ABS) resin. 21 and this lower case
An upper case 22 that covers the opening of the upper surface and an opening of the lower surface of the same material is provided on the upper part of 21 and the soft member cushion 23 is sandwiched and fixed along the peripheral surface including the lower case 21 and the front surface of the upper case 22. The case body 24 having a convex shape whose rear substantially center is projected rearward is provided.

The lower case 21 has a rib portion 25 on its upper surface substantially vertically, and the case body 24 has a horizontally elongated suction portion 26 by the rib portion 25 and a pair of rearward projections at substantially the center of the rear portion of the suction portion 26. It is formed in a convex shape with the shaft supporting portions 27, 27. Further, a suction port 28 that also functions as a leak port is formed on the lower surface of the suction part 26 of the lower case 21, and the inside of the suction part 26 serves as a suction chamber 29.

The upper case 22 covers the upper surface of the suction chamber 29 and is removably attached to the lower case 21. The case cover 31 has a substantially semicircular cross section, and the case cover 31 has a circular arc shape.
31 and a case cover 32 that partially overlaps and covers the rear upper surface of the lower case 21. The case cover 32 covers a part of the rear upper surface of the lower case 21, and the shaft support 27
And a cover 33 which is provided in series on the cover 33 and is formed in an arc shape with the same curvature as the case cover 31.
A part of which overlaps with each other and a reinforcing plate part 34 which covers the rear center of the suction chamber 29, and a substantially cylindrical shape which is located between the pair of shaft support parts 27 and 27 in the substantial center of the reinforcing plate part 34 and which faces rearward. And a connecting pipe portion 35 communicating with the suction chamber 29. The connecting pipe portion 35 is provided so that the axial direction thereof is substantially horizontal and along the front-rear direction. The portion that opens on the upper surface of the case body 24 configured by attaching the case cover 32 to the lower case 21 serves as the engagement / disengagement port 36.

At the upper edge of the reinforcing plate portion 34 of the case cover 32, a pair of locking tongue portions 34a, which project forward in a tongue-like shape,
34a is provided. Further, the inner surface of the case lid 31 is provided with engagement / disengagement recesses 34b, 34b capable of engaging / disengaging the locking tongue pieces 34a, 34a, respectively.
, 34b, engaging / disengaging projections 34c projectingly engageable between the locking tongues 34a, 34a and engageable with the upper edge of the reinforcing plate 34.

Then, on both front end sides of the lower case 21,
A driven front wheel chamber 38b is formed in which the driven front wheel 38a is rotatably supported. In addition, the pair of shaft support portions 2 of the lower case 21
A driven rear wheel chamber 39b in which a driven rear wheel 39a is rotatably supported is formed in each of 7 and 27. In addition, driven rear wheel
39a has a protective sheet (not shown) which is a flexible member such as cloth or an elastic member such as rubber provided on the outer peripheral surface thereof. The case body 24 can run on the floor surface, which is the surface to be cleaned, by the driven front wheels 38a and the driven rear wheels 39a.

On the other hand, on the inner surface side near the front edge of the lower case 21, a pair of locking recesses (not shown) facing the suction chamber 29 are provided. A locking claw 41 that can be engaged with and disengaged from the locking recess of the lower case 21 is provided on the front side edge of the case lid 31. Further, sliders 42 slidable in the left-right direction are provided on both rear edges of the case lid 31 in the left-right direction, and hooking claw portions 43 are provided on the sliders 42 in a protruding manner. In addition, the reinforcing plate portion of the case cover 32
Tongue pieces 44 that project in the left-right direction are integrally provided on both side edges of the left-right direction of 34, and the tip ends of these tongue-piece parts 44 project toward the suction chamber 29 in a substantially L-shaped cross section and the case lid is provided. Body 31
A key portion 45 is provided with which the hooking claw portion 43 of the slider 42 can be engaged and disengaged. Then, by the sliding movement of the slider 42,
A case lid 31 is detachably attached to a case cover 32 that is joined and fixed to the lower case 21.

A communication pipe 47 is arranged in the center of the rear portion of the case body 24, between the pair of shaft support portions 27, 27.
The communicating pipe 47 communicates with the joint portion 48 rotatably fitted to the connecting pipe portion 35 of the case cover portion 32 of the upper case 22, and has one end movably connected to the connecting pipe portion 35 in a vertically rotatable manner. And is pivotally supported. The communication pipe 47 is detachably connected to the cleaner 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 body 1.

Further, in the case body 24, there are disposed rotary cleaning bodies 51 rotatably supported by bearings 50 provided at both ends of the suction chamber 29 in the left-right direction. The rotary cleaning body 51 includes a shaft 52, a shaft support member 53 that is rotatably provided at both ends of the shaft 52 and is detachably attached to the bearing 50, and a tubular portion 54 that is fitted to the shaft 52. A blade serving as a cleaning member integrally provided on the outer peripheral surface of the tubular portion 54 in a spiral shape in a wall shape and having the tip side curved to one side.
And a blade portion 56 having 55. In addition,
2 and 3, the blade 55 is shown in a straight line for convenience of description. The shaft support members 53, 53 have different sizes,
The bearings 50, 50 can be engaged and disengaged only with predetermined shaft support members 53, 53. Further, the tip edge of the blade 55 is provided with a hitting portion 57 that bulges to the side opposite to the curving direction and becomes thick.

In the rotary cleaning body 51, with the shaft support members 53 at both ends of the shaft 52 mounted on the bearing 50, the blade 55 located above is curved toward the front side of the case body 24, and the rotation axis is A horizontal plane A including the plane A is located below a plane B including the central axis of the connecting pipe portion 35 that pivotally supports the communication pipe 47. Further, in the rotary cleaning body 51, the distance C between the outer peripheral edge that is the outer peripheral tip of the rotation radius R and the front side edge of the suction port 28 that is the front edge of the rotary cleaning body 51 in the rotation direction is the outer peripheral edge and the rotary cleaning body.
Suction port on the rear side in the rotation direction opposite to the edge on the front side in the rotation direction of 51
It is arranged in a size wider than the distance D from the inner surface of the suction chamber 29 that forms the edge of 28. That is, the front side gap in the rotation direction side is wider than the rear side gap around the vertical plane E including the rotation axis of the rotary cleaning body 51. And the rotary cleaning body 51
Has a concavo-convex that the lower end facing the suction port 28 is located above the plane formed by the driven front wheel 38a and the driven rear wheel 39a, and does not come into contact with the flat floor plate into the suction port 28. A blade 55 is arranged so as to contact the carpet which is the floor surface.

The reinforcing plate portion 34 of the case cover portion 32 of the case body 24 has a rotary cleaning body 51 attached / detached from an engaging / disengaging port 36 on the upper surface of the case body 24, which is opened by removing the case lid body 31 of the upper case 22. It is formed so as to cover only a part of the upper surface of the lower case 21 as much as possible. In addition, the case cover 32 and the case lid body
The inner surface of the suction cleaning chamber 31 facing the suction chamber 29 has a rotation radius R of the rotary cleaning body 51.
Is formed in an arc shape such that the radial distance from the outer peripheral tip to the inner surface of the suction chamber 29 is substantially equal distance, that is, substantially equal distance along the outer peripheral tip of the rotation radius R of the rotary cleaning body 51. There is. The rotation radius R is increased by the rotation of the rotary cleaning body 51, that is, the curved blade 55 is in a state of being linearly extended due to, for example, the blowing of the intake air flow or the action of the moment due to the rotation. Even if the effective radius S becomes as large as possible, the blade 55 does not interfere with the inner surface of the suction chamber 29 and does not come into contact with the inner surface of the suction chamber 29.

Further, the front surface of the case lid 31 of the upper case 22 is located at both end portions in the left-right direction, and a portion facing the communication pipe 47 is closed, that is, not to face the communication pipe 47. A pair of intake ports 60, 60 are formed substantially symmetrically about the center where the communication pipe 47 is located. Then, at the inner edge of the lower end of the intake port 60, the intake flow, which is the flow of air sucked from the intake port 60, is directed toward substantially above the suction chamber 29, that is, the inner surface of the case lid 31 of the upper case 22. Along with the intake air passage 61, the outer periphery of the rotary cleaning body 51 collides with the tip edge portion of the blade 55 and is rectified so as to be sprayed.
A rectifying plate 62 that forms the In addition, the straightening plate 62 has a structure in which the intake air passage 61 has an opening area downstream of the intake air passage 61 with respect to an opening area of the intake port 60 which is an opening area as an upstream air passage cross-sectional area of the intake air passage 61. The opening area, which is the area, is provided so as to be formed in a trumpet shape.

The intake ports 60, 60 are connected to the connecting pipe 47 at the joint portion.
A rotary cleaning member is arranged on a straight line connecting the center of the opening of the connecting pipe portion 35 pivotally supported via the suction chamber 28 and the center of the intake port 60.
The rotation axis of 51 is not located, and the same as the side where the plane B along the horizontal direction including the axis of the connecting pipe portion 35 is located, that is, in the horizontal direction including the rotation axis of the rotary cleaning body 51. A plane B along the horizontal direction including the center of the intake port 60 and the axis of the connecting pipe portion 35 is located above the plane A and is formed to be open. In addition, the intake ports 60, 60 have a pair of total opening areas.
The openings are formed so as 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 outer peripheral tip of the rotation radius R of the rotary cleaning body 51.

The lower case 21 has a lower surface provided with a suction port 28.
Communication groove portions 64, 64 are provided at both ends in the left-right direction of the case body 24 and are formed in a downward groove as a communication portion for communicating the outside of the case body 24 with the suction port 28. The communication groove portions 64, 64 are provided such that the front side edges in the front-rear direction are located rearward of a vertical plane E including the rotation axis of the rotary cleaning body 51.

Further, on the lower surface of the lower case 21, as shown in FIGS. 1 to 11, there is a recessed groove-shaped storage recess which is located behind the suction port 28 and which is elongated in the left-right direction and opens downward. 65 is provided, and a cleaning body 66 is detachably attached to the storage recess 65.

Further, bearing portions 67, 67 are formed on both end surfaces in the longitudinal direction, which is the left-right direction, of the storage recessed portion 65, the lower end edges of which are cut out in an arcuate concave shape. Also, the storage recess 65
On the upper surface of the
68 are provided. The step recess 68 is provided such that the front edge thereof is located rearward of the center of the storage recess 65 in the front-rear direction. Further, a plurality of claw portions 69 projecting inward in a staggered manner with their tips not facing each other are provided in the vicinity of the front and rear opening edges of the storage recess 65.

The cleaning body 66 is composed of a pedestal 71 having a substantially elongated plate shape.
have. The pedestal portion 71 is an elastically deformable member, and has a widthwise dimension of a claw portion in the front-rear direction of the storage recess 65.
It is formed wider than the distance between 69 and 69. Further, a substantially columnar shaft portion 72, which projects along the longitudinal direction and is rotatably supported by the bearing portion 67 of the storage recess 65, is integrally provided at both ends in the longitudinal direction. Then, as shown in FIG. 11, the pedestal portion 71 has a storage recess whose front upper edge is the lower surface of the case body 24.
As shown in FIG. 10, the rear upper edge contacts the ceiling surface of 65 and the rear lower edge contacts the claw portion 69, and the rear upper edge is restricted to rotate. It is housed so as to be pivotally supported so that the rotation angle of the rearward rotation is large when the frontward lower edge comes into contact with the ceiling surface and the front lower edge comes into contact with the claw portion 69 and the rearward rotation is restricted. The pedestal part
The 71 does not protrude from the lower surface of the lower case 21 even when it is rotated.

Further, on the upper surface of the pedestal portion 71, there is integrally formed a protruding portion 73 which is continuous with the outer peripheral surface of the shaft portion 72 and which has an arc shape of substantially the same curvature and protrudes in a wall shape along the longitudinal direction. ing. The outer peripheral surface of the projection 73 is always slidably in contact with the ceiling surface of the storage recess 65, and when the pedestal 71 is rotated, the contact position is changed to slide on the ceiling surface of the storage recess 65. Is formed so as to project.

Further, the lower surface of the pedestal portion 71 is formed in an arc shape in the front-rear direction which is the rotation direction with a curvature larger than the curvature of the arc centered around the rotation axis which is the central axis of the shaft portion 72. .
That is, the shaft portion 72 is provided so that the rotation axis of the pedestal portion 71 is displaced 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, end mounting recesses 74, which are recessed downwards and whose central edges are inclined, are provided at both ends of the lower surface of the base 71, as shown in FIG. Further, on both sides of the lower surface of the pedestal portion 71, edge mounting recesses 75, which are recessed grooves and are continuous with the end mounting recesses 74, are provided along the edges downward.

On the lower surface of the pedestal 71, a raised cloth 77, which is a wiping member having brushed brushes 76, is attached. The fluffed cloth 77 has peripheral edges respectively located in the end attachment recesses 74 and the edge attachment recesses 75, and is attached by, for example, an adhesive or the like in a state where the raised hairs 76 are planted substantially perpendicularly to the lower surface of the pedestal portion 71. A cleaning body 66 is formed. In the cleaning body 66, the pedestal portion 71 does not project downward from the lower surface of the case body 24, and the tip of the raised hair 76 projects from the lower surface of the case body 24, and is a plane formed by the driven front wheel 38a and the driven rear wheel 39a. The tips of the naps 76 are positioned so as not to rotate, and are arranged so as to contact between the plates, which are flat floor surfaces.

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

At the time of cleaning, the suction port body 14 is connected to the vacuum cleaner body 1 through the extension tube 13 and the hose 8 so that the hose 8
The grip portion (15) is pushed to move the suction port body (14) back and forth on the floor surface.

Then, the suction force generated by the drive of the electric blower of the cleaner body 1 sucks the air through the suction ports 60, 60 and also through the suction port 28. Here, since the suction port main body 14 is placed on the floor surface, the air passage resistance from the outside air from the intake ports 60, 60 into the suction chamber 29 passes from the outside through the lower surface of the case body 24. From suction port 28 to suction chamber 29
It is smaller than the airway resistance reaching inside. Therefore, the intake ports 60, 60
The amount of intake air from will tend to increase.

Further, in the case of a carpet having a particularly long-footed floor such as a carpet, since the hairs enter the suction chamber 28 through the suction port 28, the intake amount from the suction ports 60, 60 is further increased. Increase.

The air taken in through the intake ports 60, 60 flows into the suction chamber 29 through the intake air passage 61 while being rectified by the rectifying plate 62 and comes into contact with the blade 55 of the rotary cleaning body 51. 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 in the intake air passage 61 substantially perpendicular to the axial direction of the rotary cleaning body 51, that is, linearly along the traveling direction of the intake port body 14. After being sprayed on the cleaning body 51, the intake airflow acts on the rotating cleaning body 51 because it flows toward the center of the case body 24 along the axial direction of the rotary cleaning body 51 so as to gather and flow to the communication pipe 47. As the distance becomes longer and the rotation torque increases, the intake flow receives the air passage resistance by the rotary cleaning body 51, so that the suction port
The amount of suction from 28 is not reduced, so dust is efficiently sucked. Further, the intake port 60 is formed on the side opposite to 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 on the front side of the front end of the rotation radius R of the rotary cleaning body 51. Since the intake air flow acts on the rotary cleaning body 51 for a long time, the rotational torque further increases.

The gap between the outer peripheral tip of the rotation radius R of the rotary cleaning body 51 and the inner surface of the suction chamber 29 is defined by the intake port 60 and the communication pipe.
Since the case lid body 31 is formed in an arc shape so that the connection pipe portion 35 that pivotally supports the 47 is arranged at substantially equal intervals, the rotary cleaning body 51
Since the intake air flow acts on the tip of the outer periphery of the connecting pipe portion 35, the rotational torque is improved.

The 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 communicating grooves 64, 64 becomes a suction flow along the axial direction of the rotary cleaning body 51. Therefore, the suction flow from the communication groove portion 64 which is the right side in the traveling direction of the suction port main body 14 which is one side, that is, the side where the concave curved surface of the blade 55 of the rotary cleaning body 51 faces is the intake flow. Similarly, in a state of being sprayed on the curved surface of the blade 55 of the rotary cleaning body 51, a force acts in the rotation direction of the rotary cleaning body 51. Further, the suction flow from the communication groove portion 64 on the left side in the traveling direction, which is the other side, is the rotary cleaning body 51.
The blade 55 is blown onto the convex curved surface on the opposite side to the curved side and is guided along the curved surface of the blade 55 to escape, and almost no force is applied in the direction opposite to the rotation direction of the rotary cleaning body 51. . Therefore, the suction flow from the communication groove portion 64 also contributes to the rotation of the rotary cleaning body 51.

By the rotation of the rotary cleaning body 51, when the floor surface is a carpet or the like, the hitting portion 57 of the blade 55 collides with the floor surface and knocks out dust, and also scrapes out or sweeps to scrape away dust. Inhale through mouth 28.

The dust-containing air sucked into the suction chamber 29 is almost pushed out along the rotational direction of the rotary cleaning body 51 because the rotary cleaning body 51 is rotating and the interval C is wide. In addition, it passes through the front side to the connecting pipe portion 35 together with the intake air flow, and is hardly sucked from the interval D side which is the reverse flow direction with respect to the rotation direction of the rotary cleaning body 51. Then, the sucked-in dust flows through the extension pipe 13 and the hose 8 into the dust collecting chamber of the cleaner body 1 and is captured.

When the suction port main body 14 is moved forward during cleaning, the portion of the cleaning body 66 on the front edge side of the raised fabric 77 is in a state of rotating the cleaning body 66 in contact with the floor backward as shown in FIG. Contact with the floor surface, and wipe dust on the floor surface at this contact area.
Further, when the suction port body 14 is retracted, the portion of the cleaning body 66 on the trailing edge side of the raised fabric 77 comes into contact with the floor surface while the cleaning body 66 that contacts the floor surface is rotated forward as shown in FIG. Wipe off the dust on the floor at the contact area. In addition, raising of raised cloth 77
Since 76 is substantially perpendicular to the arcuate lower surface of the attached pedestal portion 71, when it is rotated, it is in a normal state inclined with respect to the floor surface. In other words, the front end side of the raised hair 76 extends rearward during the backward rotation during forward movement, and the front end of the raised hair 76 extends forward during the forward rotation during backward movement. Therefore, the dust on the floor surface is swept away to sweep the dust off with a light running feeling because the frictional resistance between the suction port body 14 and the floor surface is small regardless of the traveling direction.

Further, the suction port main body 14 from forward to backward
When the traveling direction of is switched, the cleaning body 66 is in the forward rotation forward state in the state of being rotated rearward, and thus the raised hair 76 is in the reverse state when retreating, and the floor surface and the cleaning body 66 are The friction resistance of is increased. For this reason, the cleaning body 66 rotates forward as it travels backward and returns to the normal state. Similarly, when the traveling direction is switched from the backward movement to the forward movement, the cleaning body 66 is rotated backward to be in the normal state.

When the traveling direction is changed from the backward movement to the forward movement, the suction port main body 14 is positioned close to the worker, and the end portion of the communication pipe 47 is turned upright to be in the standing position. The suction port body is pushed by pushing to advance in the state
14 is pressed against the floor. Therefore, the direction in which the suction port body 14 is lifted by pulling is changed from forward to backward when switching from backward to forward, and the direction in which the floor surface and the cleaning element 66 are crimped is stronger. As a result, friction resistance also becomes stronger. By the way, cleaning body
66 has a larger rotation angle for backward rotation when moving forward,
The distance that the cleaning body 66 switches from the backward movement to the forward movement during the rotation until the rotation is restricted becomes longer.

Therefore, the cleaning body 66 rotates in the same manner as the driving assistance by the rotation of the driven front wheel 38a and the driven rear wheel 39a, so that the suction port main body 14 stays on the floor until the cleaning body 66 is restricted in rotation. The cleaning body 66, which rotates without any frictional member, assists the traveling of the suction port body 14, and in particular, a light traveling feeling is obtained even when switching from the backward movement to the forward movement in the state of being pressed against the floor surface, and the traveling performance is improved. This makes cleaning work easier.

On the other hand, when the lower surface of the suction port main body 14 becomes separated from the floor surface due to movement of furniture or the like or movement of a cleaning location, the opening area becomes large and an air passage to the suction chamber 29 is formed. The airway resistance from the intake port 28 which is not the intake port 60,
Since it is smaller than the airway resistance that is taken in from 60, the suction port
As the amount of air taken in from 28 increases, the intake port
The amount of air taken in from 60, 60 decreases. Therefore, the intake air blown to the rotary cleaning body 51 is weakened and the rotary cleaning body 51 is
The rotation speed of 51 is greatly reduced.

After the cleaning, the rotary cleaning body 51 is used to remove thread dust, hair, etc. entangled with the rotary cleaning body 51.
When removing 51, the slider 42 is slid and the case lid 31 is removed, and the case lid 24 is attached and detached from the engaging / disengaging port 36 on the upper surface of the case 24. In addition, when attaching, it is attached by an operation opposite to the removing operation.

When dust adheres to the cleaning body 66 and becomes dirty, the intermediate portion of the pedestal portion 71 is elastically deformed and the claw portions 69,
After passing through 69, the shafts 72, 72 are removed from the bearings 67, 67, respectively, and removed from the storage recess 65 for cleaning. In addition, when attaching, it is attached by an operation opposite to the removing operation.

Here, since the rotary cleaning member 51 is rotated by being directly blown with the intake air flow from the intake port 60, the rotary cleaning member 51 is rotated.
No drive means such as an electric motor or an air turbine for rotating 51 is provided. For this reason, a member for covering the upper part of the driving means is not necessary, and therefore, as the upper case 22 for covering the upper surface of the case body 24, only the portion for axially supporting the communication pipe 47 via the joint portion 48 may be configured. The upper surface of the lower case 21 may be detachably closed by a case lid 31 to form an engaging / disengaging port 36 for engaging / disengaging the rotary cleaning body 51. However, if only the structure in which the upper surface of the lower case 21 is closed by the detachable case lid 31 and the communication pipe 47 is supported as the case cover 32, the force pressed against the floor surface during the forward movement during cleaning is required. And the case body 24 of the communication pipe 47 to which the load such as the force to be pulled up when retracting is connected to the hose 8.
Since it is hung on the base end part supported by, the case cover 32 cannot absorb the load sufficiently, and the communication pipe of the case body 24
There is a possibility that the portion supporting 47 may be bent and a gap may be created to cause leakage, so that the suction efficiency of dust and the intake flow for rotating the rotary cleaning body 51 cannot be ensured, or damage such as breakage may occur.

By the way, in the above embodiment, the rotary cleaning body 51 is attached to the case cover 32 of the upper case 22 supporting the communication pipe 47.
A reinforcing plate portion (34) is provided to overlap a case lid body (31) that closes an engagement / disengagement opening (36) for engaging and disengaging. Therefore, when a large load is applied to the floor surface when the suction port main body 14 is moved forward, a connecting pipe portion that pivotally supports the communicating pipe 47 via the joint portion 48.
Although the rear end side projecting rearward of 35 is pressed to the floor surface side and the front end side facing the suction chamber 29 tries to be deformed so as to be lifted upward together with the reinforcing plate part 34,
Since the reinforcing plate portion 34 is overlapped so as to cover the case lid body 31, its deformation is restricted. Therefore, it is possible to prevent a gap from being formed or damaged due to the deformation in the portion supporting the communication pipe 47.

As described above, in the above embodiment, the suction chamber 29 of the case body 24 that rotatably houses the rotary cleaning body 51.
The inner surface of the case cover 31 that covers the inner surface of the suction chamber 29 is at least the radius of gyration of the rotary cleaning body 51 between at least the intake port 60 through which the intake air flows from the intake port 60 and the connecting pipe portion 35 that pivotally supports the communication pipe 47. Since the outer peripheral tip of R is formed in an arc shape so as to be substantially equidistant, and the portion where the intake air flows to the connecting pipe portion 35 has a substantially uniform gap, for example, the torque of the rotary cleaning body 51 is increased. Therefore, by increasing the opening area of the intake port 60, the suction efficiency of dust from the intake port 28 does not decrease, and the torque of the rotary cleaning body 51 can be increased and the cleaning efficiency can be improved. Further, since the strength of the case lid 31 of the case body 24 is improved by the arc of the inner surface of the suction chamber 29, the case lid 31 can be easily handled, and when the case body 24 is assembled and the rotary cleaning body 51 is attached and detached. Since the case lid 31 can be easily attached and detached, and the assemblability and the handleability can be improved, the manufacturability and the maintainability can be improved, and the cleaning workability can be improved by being less likely to be damaged by the impact during the cleaning work. Can be improved.

Further, since the part of the case body 24 which defines the suction chamber 29 between the intake port 60 through which the intake air flows and the connecting pipe portion 35 which pivotally supports the communication pipe 47 is formed as a separate case lid body 31, the case lid is formed. The outer surface of the body 31 can be easily formed into an arc shape similar to the inner surface of the suction chamber 29, and an unnecessary space can be eliminated to easily reduce the size and weight, and the suction chamber 29 for housing the rotary cleaning body 51 can be formed. In addition to facilitating the molding of the members forming the case body 24 to be partitioned, the case body 24 can be easily formed,
Since the case lid 31 is removable, the inside of the suction chamber 29 and the rotary cleaning body 51 can be easily cleaned, the maintainability can be improved, and the assembling of the case 24 can be improved.

Further, when setting the gap between the inner surface of the suction chamber 29 and the outer circumferential tip of the rotation radius R of the rotary cleaning body 51 to be equal, the effective radius S of the rotary cleaning body 51, that is, the rotary cleaning body 51. The rotation cleaning body 51 and the case body 24 are prevented from contacting with each other at the outer peripheral end when the rotation radius R of the body 51 is maximized.
It is possible to prevent deterioration of rotatability of the rotary cleaning body 51, generation of noise, and damage to the rotary cleaning body 51 and the case body 24 due to contact with the rotary cleaning body 51.

On the other hand, the distance from the outer circumferential tip of the rotation radius R of the rotary cleaning body 51 to the edge of the suction port 28 on the front side in the rotation direction of the rotary cleaning body 51 is greater than the distance to the edge of the suction port 28 on the rear side in the rotation direction. Since the rotary cleaning body 51 is rotatably arranged so as to be wide, the air sucked together with the dust from the suction port 28 is sucked from the wide interval C side on the front side in the rotation direction and is rotated.
Of the rotary cleaning body 51 does not flow in the direction opposite to the rotation direction of the rotary cleaning body 51, and turbulent flow does not occur. By increasing the opening area of the mouth 60, the torque of the rotary cleaning body 51 can be increased and the cleaning efficiency can be improved without reducing the suction efficiency of dust from the suction port 28, and noise is generated by the turbulent flow generated by the backflow. Can be prevented.

Further, the rotary cleaning body 51 having a spirally curved blade 55 on the side on which the intake air flow from the air intake port 60 is blown is provided on both side surfaces of the case body 24 in which the rotary cleaning body 51 is rotatably arranged. Since each of the communication groove portions 64 communicating with the 28 is provided, the air sucked from the communication groove portion 64 facing the surface of the concave curved side is blown to the curved surface of the blade 55 similarly to the intake flow, and is rotationally cleaned. Acting as a force in the direction of rotation of the body 51, assists the rotation of the rotary cleaning body 51 by the intake air flow, and the air sucked from the communication groove 64 on the opposite side is the curved side of the blade 55 facing the communication groove 64. It is blown onto the convex curved surface on the opposite side and escapes along the curved surface, and does not act as a force for rotating the rotary cleaning body 51 in the direction opposite to the rotation direction. Therefore, for example, by increasing the opening area of the intake port 60, the torque of the rotary cleaning body 51 can be increased without reducing the suction efficiency of dust from the suction port 28, and the dust can be sucked from both side surfaces of the case body 24. Put
Cleaning efficiency can be improved.

On the other hand, the axis of rotation is located on the straight line connecting the intake port 60 for supplying and rotating the intake air flow to the rotary cleaning body 51 and the center of the opening cross section of the communication pipe 47 communicating with the intake port 28 and the intake port 60. Since the rotary cleaning body 51 is rotatably provided so as not to be positioned, the intake flow sucked from the intake port 60 is blown to the outer peripheral side deviated from the rotation axis of the rotary cleaning body 51.
The intake air flow is efficiently blown, the torque of the rotary cleaning body 51 can be increased, and the cleaning efficiency can be improved.

Further, since the communication pipe 47 and the intake port 60 are located on the same plane side with respect to the plane A along the horizontal direction including the rotation axis of the rotary cleaning body 51, the intake air from the intake port 60 is obtained. The entire amount of the flow is on the outer peripheral side of the rotary cleaning body 51.
It can be efficiently sprayed without flowing in the direction opposite to the rotation direction, and the torque of the rotary cleaning body 51 can be efficiently increased.

Further, these communication pipe 47 and intake port 60
Are provided above the plane A along the horizontal direction including the rotation axis of the rotary cleaning body 51, respectively. Therefore, a load for pressing the rotation direction of the rotary cleaning body 51 against the floor surface is applied. The suction port main body 14 is reversely rotated with respect to the traveling direction at the time of forward movement, and the load of the rotary cleaning body 51 being pressed against the floor surface efficiently hits the floor surface, and the dust scraping efficiency can be improved.

Further, an intake port 60 for supplying and rotating the intake air flow to the rotary cleaning body 51 is provided at a position not facing the communication pipe 47,
Since the portion facing the communication pipe 47 is in a closed state,
After being sprayed on the rotary cleaning body 51 in a straight line along the traveling direction, it flows toward the center of the case body 24 along the axial direction of the rotary cleaning body 51 so as to flow to the communication pipe 47, and then linearly. Since the intake air is not directly sucked into the communication pipe 47, the distance over which the intake air flow acts on the rotary cleaning body 51 can be increased and the rotational torque can be increased. Since the amount of suction from is not reduced, dust can be efficiently sucked in, and 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 can be reduced by reducing the opening area of the intake port 60 to secure the air volume balance. There is no need for a configuration that regulates the inflow velocity from the port 60, and by regulating the inflow velocity, turbulent flow occurs, and it is possible to prevent noise from being generated by this turbulent flow.

Further, a separate member such as an electric motor or an air turbine for driving the rotary cleaning body 51 to rotate is not required, and the size and weight can be reduced, and the area under the suction port body 14 that cannot be cleaned can be reduced, thus improving the cleaning efficiency. it can.

The intake port 60 is opened on the side opposite to 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 on the front side of the front end of the rotation radius R of the rotary cleaning body 51. Since it is formed, 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 as a pair of openings symmetrically with respect to the center of the case body 24, the external appearance can be improved, and the intake air flow can be supplied to the rotary cleaning body 51 substantially evenly in the entire longitudinal direction, and the rotary cleaning can be performed. The body 51 can be stably and efficiently rotated, and the dust scratching property can be improved.

Further, since the flow inlet 62 for supplying and rotating the intake air flow to the rotary cleaning body 51 is provided with the rectifying plate 62 and the intake air passage 61 is formed so as to blow to the outermost periphery of the rotary cleaning body 51, the intake air is efficiently taken. The flow is blown to the rotary cleaning body 51, the torque of the rotary cleaning body 51 can be improved, and the cleaning property can be improved.

Further, since the intake air passage 61 formed by the straightening plate 62 is formed in the shape of a trumpet with a small opening area on the downstream side, the intake air flow is narrowed down without generating noise due to turbulence, and the intake air flow The wind speed can be increased to increase the force applied to the rotary cleaning body 51, and the torque of the rotary cleaning body 51 can be increased to improve the cleaning performance.

Further, since the straightening vane 62 is provided inside from the intake port 60, the outer appearance of the case body 24 can be improved without protruding, and the straightening vane 62 collides with or is caught on furniture or the like during cleaning. Therefore, it is possible to prevent the cleaning work from being disturbed, and to prevent the generation of noise due to the turbulent flow generated at the protruding portion.

On the other hand, a rotary cleaning body 51 rotatably provided.
The rotation cleaning body 51 is covered with the case cover 32 that constitutes the upper case 22 of the case body 24 having the communication pipe 47 communicating with the suction port 28 and having the engagement and removal port 36 opened and closed in a part of the upper surface. Since the reinforcing plate portion 34 that overlaps the case lid 31 that constitutes the upper case 22 that is detachably attached by closing 36 is provided in the vicinity of the communication pipe 47, the communication pipe 47 that is subject to a load during cleaning is provided. The strength of the vicinity can be improved, and the load applied at the time of cleaning can be prevented from being absorbed by the reinforcing plate portion 34 and the case lid 31 which overlap, and the rotary cleaning body 51 can be removed only by removing the case lid 31. It can be easily attached and detached, and maintenance can be done easily.

Further, the case cover 32 is provided with a locking tongue piece 34a,
34a is provided, and the tongue piece 34a is locked to the case lid 31.
, 34a are provided with engagement / disengagement recesses 34b, 34b which can be engaged / disengaged respectively, and engagement / disengagement protrusions 34c which are engageable / disengageable between the locking tongue portions 34a, 34a, and which can be engaged / disengaged on the upper edge of the reinforcing plate 34. Therefore, the case cover 31 and the case cover 31 are overlapped with each other and are positioned with respect to each other in a state where the upper case 22 is configured, and the case cover 32 and the case cover 31 are displaced from each other even when a load is applied from the outside to form a gap. Deformation can be reliably prevented.

On the other hand, a 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 the direction intersecting the running direction of the suction port body 14. Since the support is provided, the cleaning body 66 rotates in the same manner as the driven front wheel 38a and the driven rear wheel 39a at the time of reversing, which is the switching of the traveling direction of the suction port main body 14 back and forth, so that traveling is assisted and traveling performance can be improved. , Cleaning work becomes easy.

Further, since the cleaning body 66 rotates to make the contacting portion with the floor different, that is, since the dust is wiped off at the running direction side portion of the raised cloth 77, the raised cloth 77 is locally damaged. Can be prevented, and the life of the cleaning element 66 can be improved.

Further, since the cleaning body 66 is regulated to rotate at a predetermined angle, compared with the conventional roller-shaped cleaning body, the structure for regulating the rotation is unnecessary, and the suction port main body 14 has a simple structure. While traveling, dust can be reliably wiped off the floor surface to improve cleaning efficiency, and the cleaning body 66 has a semicircular cross section and can be miniaturized, and the storage recess 65 as an arrangement space can also be miniaturized.

Then, the cleaning member 66 is displaced so that the lower surface of the pedestal portion 71, which is formed in an arc shape having a curvature larger than the curvature centering on the rotation axis, that is, the rotation axis approaches the lower surface. Since the raised cloth 77 is provided on the lower surface of the pedestal portion 71 formed in the above so that the raised hair 76 extends substantially perpendicularly to the lower surface, the suction port body 14 travels on the floor surface and the pedestal portion 71 rotates. At this time, since the naps 76 are inclined with respect to the floor surface in a normal state in which the tips extend to the side opposite to the running direction, the naps 76 stroke the floor surface and the suction port main body 14 is running on the floor. The frictional resistance between the surface and the cleaning element 66 is reduced, and the running performance can be improved. Further, since the cleaning body 66 has no directionality, the structure for preventing erroneous mounting on the case body 24 is unnecessary and the structure can be simplified.

Further, the cleaning member 66 is used as a recess for accommodating the case member 24.
Since the housing 65 is rotatably housed so as to project only the raised cloth 77 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, the pedestal portion 71 formed in a longitudinal shape in the axial direction.
Since the tip 73 is provided on the upper surface of the housing with a curvature substantially the same as the curvature centered on the rotation axis of the pedestal portion 71 and which comes into contact with the ceiling surface of the storage recess 65 which is the lower surface of the case body 24, the cleaning body 66 is provided. Even if a force that pushes up from the floor surface due to the contact with the floor surface is applied to the cleaning body 66, the cleaning body 66 is rotated by the position pivotally supported by the case body 24 and the protrusion 73 that contacts the lower surface of the case body 24 in a small area. Since the deformation of the cleaning body 66 can be prevented without impairing its movement, dust can be wiped off in the entire area of the cleaning body 66 in the axial direction, and at the same time, the cleaning body 66 can be wiped off.
It is possible to prevent damage such as breakage of 66.

Then, on the lower surface of the case body 24, there are provided claw portions 69, 69 which are located below the cleaning body 66 and project toward the cleaning body 66 to restrict the rotation of the cleaning body 66 within a predetermined angle range. Since it is provided, it is possible to prevent rotation with a simple structure and prevent the cleaning body 66 provided on the lower surface of the case body 24 from falling off.

Furthermore, since the claw portions 69, 69 are provided in a zigzag shape and the pedestal portion 71 is made of an elastically deformable material, the cleaning member 66
Can be easily attached and detached.

Further, since the pedestal portion 71 is provided with the end mounting recessed portion 74 and the edge mounting recessed portion 75 for embedding the peripheral edge of the raised cloth 77, the raised cloth 77 and the floor surface are contacted and rubbed with each other, so that the raised cloth 77 is removed from the peripheral edge. It is possible to prevent the cleaning element 66 from being peeled off and being damaged.

Then, the elongated cleaning member 66 is attached to the suction port body 14
Since it is arranged almost all over the left and right direction of the case body 24
The airtightness of the lower surface of the device is improved, the negative pressure is increased, and the suction efficiency of dust can be improved.

Further, since the cleaning element 66 is detachable, only the cleaning element 66 needs to be washed even if it becomes dirty due to the adhesion of dust.
Maintainability can be improved.

In the above embodiment, not only the canister-type vacuum cleaner but also the upright type in which the suction port body 14 is directly formed on the lower surface of the vacuum cleaner body 1, other than the vacuum cleaner body 1 and the suction port It can also be applied to a self-propelled electric vacuum cleaner in which the main body 14 is integrated.

Further, although one rotary cleaning body 51, which rotates by being directly blown with the intake air flow, has been described, a plurality of rotary cleaning bodies 51 may be provided. Furthermore, as the rotary cleaning body 51, in addition to the blade 55, a rotary brush having a wall-shaped raised brush, a cloth blade portion provided, any cleaning member that is a combination of a brush, a cloth blade, and the blade 55. It may be a thing.

Further, although the description has been made so that the intake flow blown by the blades 55 of the rotary cleaning body 51 is curved in a concave shape on the side where the intake flow is blown so as to efficiently contribute to the rotation, it may not be curved. In this case, the case body 24 facing the surface of the blade 55 on the side where the intake air flow is blown
It is necessary to provide the communication groove portion 64 on one side surface. That is,
Case body 24 facing the side opposite to the side where the intake air is blown
This is because when the communication groove 64 is provided on the other side surface, the air sucked from the communication groove 64 acts as a force in the direction opposite to the rotation direction of the rotary cleaning body 51, and the torque cannot be improved. In the case of a non-curved object, the radius of rotation R does not increase so that the blade 55 extends even when a moment during rotation acts, so the radius of rotation R also becomes the effective radius S.

On the other hand, although one cleaning member 66 is arranged behind the suction port 28 in the description, it may be provided in front of the suction port 28 or with a plurality of cleaning members 66, or without the cleaning member 66. Good.

Further, as the cleaning body 66, in addition to the napped cloth 77, the one having brush bristles directly planted on the pedestal portion 71 and having a dust scraping action such as scraping and sweeping of dust has the same effect. Have.

Further, although the napped fabric 77 is provided so that the napped fabric 76 is substantially perpendicular to the lower surface of the pedestal portion 71, the napped fabric 77 is provided, for example, in such a manner that the tip extends backward with respect to the forward direction. Good. That is, when the suction port main body 14 is pressed against the floor surface, the raised hairs 76 lie more during the forward movement, which further improves the running property and also provides the dust sweeping action when the backward movement is performed. In addition, when the brush bristles and the raised bristles 76 are provided in an inclined manner, it is preferable to provide a configuration in which the shafts at both ends have different diameters to prevent incorrect attachment to the case body 24.

The cleaning body 66 may be directly rotatably arranged on the lower surface of the case body 24 without being arranged in the storage recess 65.

On the other hand, although the intake ports 60 have been described as being provided symmetrically, for example, when using the rotary cleaning body 51 in which the blade 55 is provided in a linear shape that is not spiral, the positions of the intake ports 60, 60 that open to the left and right are set. It may be provided so as to be offset in the vertical direction.

Further, although two intake ports 60 are opened in the front side in the traveling direction, they may be provided at any position, and the number is not limited to two, and one or more may be provided.

Further, the rectifying plate 62 provided at the intake port 60 is provided inside the case lid 31 of the case body 24 so that the opening area of the downstream side of the intake air passage is gradually reduced. It may be formed so as to form a suction air passage by projecting outward in a cylindrical shape.

Further, although the communication pipe 47 is pivotally supported by the connecting pipe portion 35 through the joint portion 48, the direct communication pipe 47 is rotatably pivotally supported, and the communication pipe 47 is fixedly provided. The same effect can be obtained with the used one.

Although the reinforcing plate portion 34 formed in the shape of an arc plate as the reinforcing portion has been described, any other shape, such as a rib shape, may be used as long as the reinforcing plate portion 34 has an overlapping shape corresponding to the shape of the case lid 31. It may be a structure.

Further, the case lid 31 and the case cover 32.
The engaging tongue portion 34a, the engaging / disengaging concave portions 34b, 34b, and the engaging / disengaging convex portion 34c have been described as the structure for engaging and disengaging each other.
Any other structure may be provided or may not be provided. In addition,
By providing these engaging / disengaging structures, the size of the reinforcing plate portion 34 can be made smaller, the opening of the engaging / disengaging port 36 can be made relatively large, and the work for attaching / detaching the rotary cleaning body 51 can be facilitated.

Next, another embodiment will be described with reference to FIG.

In the embodiment shown in FIG. 13, a rib 81 is provided on the inner surface of the case lid 31 of the embodiment shown in FIGS.
Is provided.

That is, on the inner surface of the case lid 31, a plurality of wall-shaped ribs 81 are provided substantially parallel to each other along the running direction which is the width direction. Note that the ribs 81, 81 have arcuate tips at their tips like the inner surface of the case lid 31, and the outer circumferential tips at the effective radius S of the rotary cleaning body 51 do not interfere with the inner surface of the suction chamber 29, that is, the blade 55. Are formed so as not to contact the case body 24.

Then, the intake flow from the intake port 60 is generated by the rib 81.
Guided in a direction orthogonal to the axial direction of the rotary cleaning body 51,
That is, since the blades 55 of the rotary cleaning body 51 are blown linearly along the traveling direction in a substantially vertical manner, the torque of the rotary cleaning body 51 can be improved and the ribs 81 can cover the case lid.
The strength of 31 can be further improved.

Next, still another embodiment will be described with reference to FIG.

In the embodiment shown in FIG. 14, the suction portion 26 of the embodiment shown in FIGS. 1 to 12 is formed in a substantially cylindrical shape.

That is, as in the case lid 31, the inner peripheral surface of the lower case 21 on the front side of the front edge of the suction port 28 has substantially equal intervals from the outer circumferential tip of the rotation radius R of the rotary cleaning body 51. To be formed. With this configuration, a gap is formed from the front side edge of the suction port 28 in which air is sucked together with dust and becomes a suction flow to the connection pipe portion 35 that pivotally supports the communication pipe 47 via the suction port 60 in the rotation direction of the rotary cleaning body 51. Are approximately evenly spaced.

Therefore, according to the embodiment shown in FIG. 14, the inner surface of the suction chamber 29 of the case body 24 is rotated from the inner surface of the suction chamber 29 between the suction port 28 and the suction port 60 by rotating the rotary cleaning body 51. Since it is formed in an arc shape so that the tip of the outer periphery of the radius R is substantially equidistant, the inner surface of the suction chamber 29 from the suction port 28 to the suction port 60 has the same curvature as the curvature of the rotation radius R of the rotary cleaning body 51. The suction flow that is sucked together with dust from the suction port 28 extends from the suction port 28 to the suction port 60.
It acts in the rotation direction of 51, and further, from the intake port 60 to the connecting pipe portion 35 that pivotally supports the communication pipe 47, it acts in the rotation direction of the rotary cleaning body 51 together with the intake air flow, and suction from the suction port 28. Since the flow efficiently contributes to the rotation of the rotary cleaning body 51, the torque of the rotary cleaning body 51 can be further increased.

Also in the embodiment shown in FIG. 14, ribs 81 similar to those of the embodiment shown in FIG. 13 may be provided as shown in FIG. 15, for example. According to the configuration shown in FIG. 15, ribs 81 similar to those of the embodiment shown in FIG.
It is possible to improve the torque of the rotary cleaning body 51 and the strength of the case body 24 due to the intake air flow guided by.

Next, still another embodiment will be described with reference to FIG.

In the embodiment shown in FIG. 16, the rotary cleaning body 51 of the embodiment shown in FIG. 15 is rotated in the reverse direction.

In other words, the blade 55 located above the rotary cleaning body 51 is pivotally supported so as to be curved to the rear side of the case body 24, and the intake air passage 61 continuous to the intake port 60 is axially moved in a substantially vertical direction. So that the intake air flows toward the curved surface of the blade 55, and the rotary cleaning body 51 is rotated forward when the suction port body 14 moves forward. . Then, on the inner surface of the suction chamber 29 of the case body 24, the communication pipe from the intake port 60 through which the intake flow from the intake port 60 flows.
The inside of the suction chamber 29 is formed so that the gap between the inner surface and the tip of the outer periphery of the rotation radius R of the rotary cleaning body 51 is substantially equal to the connecting pipe portion 35 that pivotally supports 47. Also, the gap between the tip of the rib 81 provided on the above and the tip of the outer periphery of the rotation radius R of the rotary cleaning body 51 is set to be substantially equal.

Also for the embodiment shown in FIG. 16,
Similar to the embodiment shown in FIGS. 1 to 12, the embodiment shown in FIG. 13, the embodiment shown in FIG. 14, and the embodiment shown in FIG. 15, the torque and the strength of the rotary cleaning body 51 are increased. In addition, since the rotary cleaning body 51 is rotated in the forward direction when the rotary cleaning body 51 moves forward with a load that presses the suction port body 14 against the floor surface, the running performance of the suction port body 14 is improved and the cleaning workability can be improved.

[0118]

According to the suction port body of the vacuum cleaner of the first aspect of the present invention, the suction chamber of the case body that rotatably accommodates the rotary cleaning body that is rotated by blowing the intake air flow from the intake port onto the cleaning member. The inner surface of the is formed in an arc shape so that the radial distance from the outer circumferential tip of the rotation radius of the rotary cleaning body to the inner surface of the suction chamber is substantially equal between at least the intake port through which the intake flow flows and the communication pipe. Therefore, the inner surface of the suction chamber from the intake port to the communication pipe has the same curvature as the radius of gyration of the rotary cleaning body, and the intake flow from the intake port reaches the communication pipe in the rotation direction of the rotary cleaning body. and Do Rutotomoni, intake
The air duct is formed so that the opening area is small on the downstream side.
Therefore, for example, suction without generating noise due to turbulence
Rotating cleaning body
Since the force to be applied to the rotary cleaning body can be increased and the intake air flow can efficiently contribute to the rotation of the rotary cleaning body, for example, by increasing the opening area of the intake port to increase the torque of the rotary cleaning body, the suction of dust from the suction port is increased. The torque of the rotary cleaning body can be increased without lowering the efficiency, and the cleaning efficiency can be improved, and the strength of the case body is improved by the arc of the inner surface of the suction chamber, so that the assemblability and handleability can be improved.

According to the suction port body of the vacuum cleaner of claim 2, in addition to the effect of the suction port body of the vacuum cleaner of claim 1, the inner surface of the suction chamber of the case body is provided between the suction port and the suction port. In the above, the inner surface of the suction chamber from the suction port to the suction port is rotated because it is formed in an arc shape so that the radial distance from the outer circumferential tip of the rotation radius of the rotary cleaning body to the inner surface of the suction chamber is substantially equal. The suction flow that becomes the same curvature as the radius of gyration of the cleaning body and is sucked together with dust from the suction port acts in the rotation direction of the rotary cleaning body from the suction port to the suction port.
Further, from the intake port to the communication pipe, it is in a state of acting in the rotation direction of the rotary cleaning body together with the intake air flow, and the suction flow also contributes efficiently to the rotation of the rotary cleaning body, so that the torque of the rotary cleaning body can be increased.

According to the suction port body of the vacuum cleaner of claim 3, in addition to the effect of the suction port body of the vacuum cleaner of claim 1 or 2, at least the space between the intake port and the communication pipe through which the intake flow flows. Since the part of the case body that divides the suction chamber is a separate case lid, the outer surface of the case lid can be easily formed into an arc shape similar to the inner surface of the suction chamber, and it is possible to easily reduce the size and weight and rotate it. A case body that divides the suction chamber that houses the cleaning body can be easily formed, and the removable case lid makes it easy to clean the suction chamber and the rotary cleaning body, improving the maintainability and assembling the case body. Can be improved.

According to the suction port body of the vacuum cleaner of claim 4, in addition to the effect of the suction port body of the vacuum cleaner of any one of claims 1 to 3, at least the inner surface of the suction chamber of the case body is at least Since the ribs are provided between the intake port through which the intake air flows and the communication pipe, and extend along the direction intersecting the axial direction of the rotary cleaning body, the strength of the case body can be improved and the intake air flow from the intake port becomes the ribs. By being guided, the rotary cleaning body can be efficiently supplied in the direction intersecting the axial direction, and the torque of the rotary cleaning body can be improved.

According to the suction port body of the electric vacuum cleaner described in claim 5, in addition to the effect of the suction port body of the electric vacuum cleaner described in any one of claims 1 to 4, rotation of the rotary cleaning body up to the tip of the outer periphery is achieved. Since the radius is set to be an approximately equal distance to the inner surface of the suction chamber as an effective radius that is increased by the moment that acts during the rotation of the rotary cleaning body, the case body is used even if the rotary cleaning body whose rotation radius changes due to rotation is used. It is possible to prevent the rotary cleaning body from coming into contact with the inner surface of the casing, and to prevent deterioration of rotatability of the rotary cleaning body, noise generation, and damage due to contact with the case body.

According to the electric vacuum cleaner of the sixth aspect, the torque of the rotary cleaning body is increased without lowering the dust suction efficiency to improve the cleaning efficiency, and the strength is improved to improve the assemblability and handleability. Since the suction port body of the electric vacuum cleaner according to any one of claims 1 to 5 is provided, the manufacturability, cleaning workability, and maintenance controllability can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a suction port body of an embodiment of a suction port body of an electric 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 cross-sectional view showing the vicinity of the cleaning body of the suction inlet 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 side sectional view of the same.

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

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

FIG. 12 is a perspective view showing the same cleaner body.

FIG. 13 is a plan view of the inner surface side of the case lid body showing another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

FIG. 14 is a side cross-sectional view showing still another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

FIG. 15 is a side sectional view showing still another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

FIG. 16 is a side cross-sectional view showing still another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

[Explanation of symbols]

1 Vacuum cleaner body 14 Suction port body 24 case body 28 Suction port 29 Suction chamber 31 case lid 47 Communication pipe 51 rotating cleaning body 55 Cleaning member 60 inlet 81 ribs R radius of gyration S effective radius

Front page continuation (72) Inventor Kiyoshi Ishikawa 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tech inside the Hadano Plant (72) Inventor Ikuhiro Otsu 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tech Inside the Hadano Plant (72) Invention Person Yukiyuki Ichino 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tech inside the Hadano Plant (56) References JP-A-11-89765 (JP, A) International Publication 96/028081 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/04

Claims (6)

(57) [Claims] 1. A case body having a suction chamber opening a suction port on a lower surface facing a surface to be cleaned and having an intake port communicating with the suction chamber, and the suction port and the intake air provided on the case body. A communication pipe communicating with the mouth, and a cleaning member that is rotatably accommodated in the suction chamber of the case body and scrapes up the surface to be cleaned, and the intake air flow from the intake opening is blown through the intake air passage. And an inner surface of the suction chamber of the case body, at least between the intake port and the communication pipe through which the intake flow flows, from the outer circumferential tip of the rotation radius of the rotary cleaning body to the suction chamber of the suction chamber. The inner surface is formed in an arc shape with a substantially equal distance along the radial direction.
The intake air passage has an opening surface on the downstream side of the opening area on the upstream side.
The product is formed so that the product becomes small, and the downstream side
The suction port body of the vacuum cleaner, which is continuous with the inner surface of the suction chamber of the case body. 2. The inner surface of the suction chamber of the case body has a substantially equal distance between the suction port and the suction port along the radial direction from the outer circumferential tip of the rotation radius of the rotary cleaning body to the inner surface of the suction chamber. The suction port body of the vacuum cleaner according to claim 1, wherein the suction port body has an arc shape. 3. The suction port of an electric vacuum cleaner according to claim 1, wherein the case body is provided with a case lid body which defines at least an intake port through which an intake flow flows and a communication pipe. body. 4. A rib is provided on the inner surface of the suction chamber of the case body, the rib being located at least between the intake port and the communication pipe through which the intake air flows and extending along the direction intersecting the axial direction of the rotary cleaning body. The suction port body of the vacuum cleaner according to any one of claims 1 to 3. 5. The rotating radius to the outer peripheral tip of the rotary cleaning body is an effective radius which is increased by a moment acting during the rotation of the rotary cleaning body. Vacuum cleaner suction inlet body. 6. An electric vacuum cleaner comprising: a suction port body of the electric vacuum cleaner according to claim 1; and a cleaner body to which the suction port body is connected.