JP2001008864A - Vacuum cleaner and its suction port body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the suction port body of a vacuum cleaner preventing the rotation of a driven wheel from being impaired by entangling thread wastes and capable of easily removing entangled thread wastes. SOLUTION: A driven rear wheel chamber 66 rotatably storing a driven rear wheel 65 is formed on journal sections on both sides behind the communication pipe of a case body. A coaxially protruded journal tube section 68b and an engaging groove section 68c with a recessed groove-like circumference are formed on both end faces of a rear wheel section 68 rotatably journalled to a rear wheel shaft 67. A small-diameter small wheel section 69 is journalled to the journal tube section 68b to nearly cover the rear wheel shaft 67 between the rear wheel section 68 and the sidewall face 66a of the driven rear wheel chamber 66. An engaging tube section 69b coupled with the engaging groove section 68c is formed at one end of the small wheel section 69. Even if thread wastes entangle with the small wheel section 69, the thread wastes can be easily removed by rotating only the small wheel section 69. Even if thread wastes enter between the rear wheel section 68 and the small wheel section 69, the thread wastes do not entangle with the rear wheel shaft 67, and the rear wheel section 68 can be stably rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner which rotatably supports wheels and a suction port thereof.

[0002]

2. Description of the Related Art Conventionally, wheels are rotatably supported on a suction port of a vacuum cleaner so that the wheels can run on a floor surface. By the way, since the suction port body is small in terms of cleanability, the wheel of the suction port body is rotatable with a rotation axis closer to the floor surface than the position of the rotation axis of the wheel of the vacuum cleaner body. Supported. And, together with facing the suction wind containing dust, lint and the like are easily entangled with the axle that rotatably supports the wheel, and bite between the end surface of the wheel and the inner wall surface of the wheel room. , The wheels may not be able to rotate.

Therefore, as a suction port of a conventional vacuum cleaner, for example, a configuration described in JP-A-6-14852 is known.

[0004] The suction opening of the vacuum cleaner described in Japanese Patent Application Laid-Open No. 6-14852 has a suction opening at the lower surface, and has an axial direction along a longitudinal direction in a case body that is long in the traveling direction. The shaft is rotatably supported. A pulley is provided at one end of the shaft to be engaged with an output pulley of the motor via an endless belt, and is rotated by driving of the motor. The shaft is provided with a traveling wheel that rotates with the shaft by driving an electric motor with a peripheral surface being in contact with the floor surface, and a driven wheel is rotatably supported adjacent to the traveling wheel. . The driven wheel has an end surface on the traveling wheel side which has a small diameter and protrudes coaxially, and a flange is provided outward at the tip, and a cylindrical small wheel portion which comes into contact with the end surface of the traveling wheel via a slip ring. Is provided integrally to prevent lint and the like from getting entangled in the shaft from between the running wheel and the driven wheel, and easy to rotate with the rotatable driven wheel even if the lint is entangled in the small wheel part. The structure which can be removed is adopted.

[0005]

However, in the suction opening of the vacuum cleaner described in Japanese Patent Application Laid-Open No. 6-14852, the small wheel portion is provided integrally with the driven wheel. When removing entangled lint or the like, it is necessary to rotate the small wheel together with the driven wheel to remove it, which makes the removal operation complicated.

Therefore, the driven wheel and the small wheel are separately provided,
When removing lint or the like entangled in the small wheel portion, it is conceivable to rotate only the small wheel portion. However, when the driven wheel and the small wheel portion are formed separately, there is a possibility that lint or the like is entangled with the shaft from between the driven wheel and the small wheel portion, which may hinder the rotation of the driven wheel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an electric vacuum cleaner which prevents the rotation of a driven wheel from being impaired by entangled thread dust and the like and easily removes the entangled thread dust and the like and a suction device therefor. The purpose is to provide the mouth.

[0008]

According to a first aspect of the present invention, there is provided a vacuum cleaner having a suction opening having a suction opening on a surface facing a surface to be cleaned, and a cleaning surface provided on the case. A wheel chamber for rotatably disposing wheels so as to be able to run on the wheel, wherein the wheels are rotatably supported by the axle at least at one end in the axial direction and attached to the case body; The end portion of the wheel has a shaft support portion integrally protruding substantially coaxially, and a wheel portion whose peripheral surface is in contact with the surface to be cleaned, and is rotatably supported by the shaft support portion so as to cover the axle. And a small wheel portion smaller in diameter than the wheel portion.

[0009] Then, a shaft support cylinder portion is integrally protruded coaxially at an axial end of a wheel portion rotatably supported on the axle,
In order to rotatably support the small wheel portion smaller in diameter than the wheel portion by covering the axle on the shaft support portion, the wheel portion and the small wheel portion can rotate independently of each other. Even if dust is entangled, only the small wheel part can be removed by rotating it with respect to the wheel part, making it easy to remove entangled thread debris, etc., and even if thread debris enters between the wheel part and small wheel part, the shaft support Since it is not entangled with the axle, the rotation of the wheel is prevented from being impaired.

[0010] The suction opening of the vacuum cleaner according to claim 2 is
A case body that opens a suction port on a surface facing the surface to be cleaned,
A wheel chamber provided on the case body and rotatably disposed with wheels so as to be able to run on the surface to be cleaned, wherein the wheels are:
An axle having at least one end in the axial direction attached to the case body, a wheel portion rotatably supported by the axle and having a peripheral surface in contact with the surface to be cleaned, and an axle covering the axle and rotatable on the axle. A small wheel portion supported and smaller in diameter than the wheel portion,
Biasing means for pressing the small wheel portion against the inner surface of the wheel chamber.

The wheel portion is rotatably supported on the axle, and the small wheel portion smaller in diameter than the wheel portion is rotatably supported by covering the axle. For example, even if lint is entangled in the small wheel portion, it can be removed by rotating only the small wheel portion, making it easy to remove the entangled yarn dust, and between the small wheel portion and the inner surface of the wheel chamber. Prevents lint from entering the axle.

The suction body of the vacuum cleaner according to claim 3 is
3. The suction body of a vacuum cleaner according to claim 2, wherein the urging means includes a concave portion provided on an end surface of the wheel portion on the side of the small wheel portion, and a tip provided on an end surface of the small wheel portion facing the wheel portion. And a conical portion having an inclined surface which is formed in a substantially conical shape which can be inserted into the concave portion and which comes into contact with the edge of the concave portion and presses the small wheel portion against the inner surface of the wheel chamber.

The small wheel portion is brought into contact with the edge of the concave portion in a substantially conical shape which can be inserted into a concave portion provided on the small wheel portion side end surface of the wheel portion. In order to provide a conical portion having an inclined surface that presses the inner surface of the wheel chamber, the small wheel portion is pressed against the inner surface of the wheel room when the wheel is in contact with the ground with a simple configuration without using another member such as a spring member. It prevents lint from getting entangled with the axle.

[0014] The suction opening of the vacuum cleaner according to claim 4 is:
4. The suction port body for a vacuum cleaner according to claim 1, wherein the small wheel portion is provided with a flange portion protruding outward at an end edge facing the inner surface of the wheel chamber. is there.

In addition, since a flange portion protruding outward is provided at an end edge of the small wheel portion facing the inner surface of the wheel chamber, thread debris entangled with the small wheel portion is removed from the wheel portion by a simple structure. This prevents the axle from entangled with the axle by falling between the inside of the room.

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

The suction port body for an electric vacuum cleaner according to any one of claims 1 to 4, wherein the rotation of the driven wheel is prevented from being impaired by the entangled thread dust and the like, and the entangled thread dust and the like can be easily removed. , Cleaning and maintenance management are improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a vacuum cleaner according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a cleaner body, which comprises a lower body case 2a having an open upper surface, and an upper body case 2b for closing a 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 (not shown) which is opened / closed and accommodates a dust collecting filter is defined 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, the suction port main body 14 is shown in FIGS.
As shown in the figure, acrylonitrile-butadiene-styrene (AB
S) Lower case with open upper surface made of synthetic resin such as resin
21 and an upper case 22 that covers the upper opening at the upper part of the lower case 21 and opens the lower surface of the same material, and a soft member buffer 23 along the peripheral surface including the front surfaces of the lower case 21 and the upper case 22. And has a convex-shaped case body 24 whose rear substantially approximate center protrudes rearward.

The lower case 21 has a rib portion 25 substantially vertically on the upper surface, and the case body 24 is formed by the rib portion 25 and a pair of horizontally elongated rectangular suction portions 26 and a pair of rear portions protruding rearward substantially at the center of the rear portion of the suction portions 26. The shaft support portions 27 are formed in a convex shape. In the suction part 26, a rib part 25 communicates with a suction chamber 31 which is horizontally long on the front side and has an opening 30 formed on the lower surface of the lower case 21, and a rear center of the suction chamber 31. And a drive chamber 33 formed on one end side of the suction chamber 31 in the longitudinal direction, and a drive chamber 33 of the air path chamber 32 formed on one shaft support 27. Circuit room 34 and airway room
On the other side of 32, there is provided a floor detection chamber 35 partitioned and formed over the other shaft support 27. The lower surface of the end of the suction chamber 31 of the case body 24 opposite to the drive chamber 33 is opened downward, and a closing plate 36 is detachably attached to the opening with a mounting tool 37.

Further, a driving chamber is provided on the lower surface of the lower case 21.
A first communication recess 38 in the form of a groove is provided on the lower surface of the suction chamber 31 and serves as a leak port for communicating the outside of the side of the case body 24 with the suction chamber 31. A second communication concave portion 39 having a groove shape and serving as a leak port for communicating the rear outside of the case body 24 and the suction chamber 31 is provided.

On the lower surface of the lower case 21, there are provided brush bodies 42 as cleaning bodies having brush bristles 41 planted laterally, located at both ends on the front side. Further, on the lower surface of the lower case 21, there is provided a cleaning body 43 as a cleaning body formed of a cloth member having a raised surface planted forward and located at the rear of the lower surface of the drive chamber 33.

On the other hand, an upper case 22 is provided with a case cover 45 having a substantially arc-shaped cross section which covers a substantially upper surface of the suction chamber 31 which is a front side of the lower case 21, and a gap which covers a rear edge of the upper surface of the case cover 45. An intake lid 46 that is detachably attached via
A case cover 47 is provided to cover the rear side of the lower case 21 over the pivot portions 27, 27. In addition, on the front surface of the intake lid 46, an intake port 48 also having a function as a leak port is provided.
A plurality, for example, two openings are formed along the longitudinal direction of
The intake port 48 communicates with the suction chamber 31 with a gap between the case lid 45 and an intake air path 49.

Further, the case body 24 is provided with a connecting pipe portion 51 which is sandwiched and fixed between the shaft supporting portions 27 and 27 at substantially the rear center of the lower case 21 and the upper case 22 to partition the air passage chamber 32. ing. The connection pipe portion 51 is provided with a suction wrapper portion 52 that expands in a trumpet shape on one end side in the axial direction, and a tubular suction pipe portion 54 provided with a substantially cylindrical connection suction pipe portion 53 on the other end side.
And a suction wrapper part 52 substantially at the center of the suction pipe part 54.
A connecting flange portion 55 is provided between the lower case 21 and the upper case 22 so as to protrude in a flange shape between the lower case 21 and the upper case 22. The connection pipe portion 51 has the periphery of the suction wrapper portion 52 and the connection flange 55 sandwiched between the lower case 21 and the upper case 22 such that the suction wrapper portion 52 of the suction pipe portion 54 opens toward the suction chamber 31. Be attached. The suction pipe section
Between the outer periphery of the suction wrapper part 52, the connecting flange part 55 and the lower case 21, a wire wiring path 58 through which the circuit chamber 34 and the floor detection chamber 35 communicate and a wire (not shown) is formed is defined. Is done.

The connecting flange 55 is provided with an electric wire insertion hole 61 through which an unillustrated lead wire is inserted along the outer peripheral side of the suction pipe 54 in an arc shape. Note that this wire insertion hole 61
Is chamfered so as not to damage the lead wire even if the lead wire contacts. Further, on the outer peripheral surface of the connection suction pipe portion 53 of the suction pipe portion 54, a rotation regulating protrusion projecting outward is protruded.

Then, on both ends of the front part of the lower case 21,
A driven front wheel chamber 64 is formed in which a driven front wheel 63a is rotatably supported by a front wheel shaft 63b. Also the lower case
A driven rear wheel chamber, which is a wheel chamber in which a driven rear wheel 65, which is a wheel, is rotatably supported by a pair of shaft support portions 27, 27, respectively.
66 are formed. The side wall surface 66a of the driven rear wheel chamber 66
, 66a are formed so as to be substantially parallel planes and substantially perpendicular to the floor surface when placed on the floor surface.

As shown in FIGS. 1 and 15, the driven rear wheel 65 has an axle rotatably supported at both axial ends by side walls 66a, 66a of the driven rear wheel chamber 66 which are opposed to each other in the left-right direction. And a rear wheel part 68 as a wheel part which is rotatably supported by being fitted with the rear wheel shaft 67. The rear wheel portion 68 has a bearing hole 68a into which a rear wheel shaft 67 is rotatably fitted. At the axially opposite end surfaces of the rear wheel portion 68, an inner peripheral surface is continuous with the bearing hole 68a, and a cylindrical shaft support tube portion 68b having a diameter smaller than the outer diameter of the rear wheel portion 68 is substantially coaxially integrated. It is provided in. The distance from the tip of one shaft support portion 68b to the tip of the other shaft support portion 68b is the side wall surface of the driven rear wheel chamber 66 facing in the left-right direction.
66a, 66a are formed to have dimensions substantially the same as or slightly shorter than the distance between 66a. Further, engaging groove-shaped portions 68c in the form of circumferential concave grooves are provided on both end surfaces in the axial direction of the rear wheel portion 68, and are located on the outer peripheral side from the shaft support tube portion 68b. The shaft support tube portion 68b has a substantially cylindrical shape, a diameter smaller than the outer diameter of the rear wheel portion 68, and an axial dimension substantially equal to the axial length of the shaft support tube portion 68b. A small wheel portion 69 is rotatably supported by the shaft.

The small wheel portion 69 is provided with a flange portion 69a protruding outward at the outer peripheral edge at one end in the axial direction. At the other end in the axial direction of the small wheel portion 69, an engagement cylindrical portion 69b which is substantially coaxially cylindrical and is rotatably fitted and engaged with an engagement groove portion 68c of the rear wheel portion 68 is integrally formed. Is provided. And
The small wheel portion 69 has a flange portion 69a formed at a substantially flat end surface and is substantially parallel to the side wall surface 66a of the driven rear wheel chamber 66 while being supported by the shaft support tube portion 68b. In contact with the surface.

The rear wheel portion 68 of the driven rear wheel 65 is provided with a protective sheet 68d which is a flexible member such as cloth having a raised surface on the outer peripheral surface or an elastic member such as rubber.

The case body 24 can run on the floor, which is the surface to be cleaned, by the driven front wheel 63a and the driven rear wheel 65.

In the center of the rear part of the case body 24, a communication pipe 71 is disposed between the pair of shaft supports 27, 27.
The communication pipe 71 has a joint part 72 rotatably fitted to the connection suction pipe part 53 of the suction pipe part 54 of the connection pipe part 51 of the connection pipe part 51 provided in the case body 24, and one end of which is vertically connected at the other end. Swivel joint 72
And a communication pipe portion 73 which is pivotally supported by the

The communication pipe portion 73 is composed of a substantially cylindrical tubular portion 74 whose one end is bent, and a communication rotating portion 75 provided at one end of the tubular portion 74. Also, the cylindrical portion 74
The outer peripheral surface on the bending side of the
A wiring chamber 77 is formed in the compartment 76 and is fixedly mounted with screws (not shown).

On the other hand, the communication rotating part 75 is substantially semi-cylindrical and has an axial direction in the left-right direction which is a direction orthogonal to the axial direction of the cylindrical part 74, and is provided integrally on one end side of the cylindrical part 74. A rotating tubular portion 80, and a wrapper portion 81 integrally provided in the rotating tubular portion 80 and formed in a trumpet shape so that the inner surface of the tubular portion 74 expands from the inner surface thereof. Reinforcing ribs 82 are integrally provided substantially radially from the inner surface of the moving cylinder portion 80 to the outer surface of the wrapper portion 81. The communication rotating portion 75 is provided integrally with a substantially cylindrical rotating shaft 84 substantially coaxially at the center position of the reinforcing rib 82, that is, at both end positions of the rotating cylindrical portion 80.
Furthermore, at the edges along the axial direction of the rotating cylinder portion 80 near the upper and lower edges where the wrapper portion 81 of the communication rotating portion 75 expands, a retaining claw portion 85 projecting outward in a wall shape projects. Has been established. And
The outer peripheral surface of the rotating cylinder 80 has a wall-like joint along the axial direction.
A rotation restricting rib 86, which comes into contact with 72 and is restricted from rotating, protrudes.

Further, a wiring opening 88 communicating with the space between the rotating tubular portion 80 and the wrapper portion 81 is formed at the base end position where the communicating rotating portion 75 is connected to the tubular portion 74. In addition, one of the rotary shafts 63, that is, the rotary shaft 63 located on the circuit chamber side, is formed with a notch 89 in the axial direction.

Further, the communication pipe portion 73 is provided integrally with the cover portion 76 and partially covers the outer peripheral surface of the tubular portion 74 so that the inside is connected to the wiring chamber 77 and the rotating tubular portion 80 in the cover portion 76 and the wrapper. A wiring cover part 92 is provided to define a wiring path chamber 91 communicating with a space between the wiring part 91 and the wiring part 91. The wiring cover portion 92 has a cover covering portion 93 that is provided in series on the cover portion 76 and covers a part of the outer peripheral surface of the tubular portion 74, and one side edge of the cover covering portion 93 has a rotating tubular portion. One end of 80, that is, the side where the rotating shaft 84 provided with the wiring cutout 89 is located,
A fan 94 is provided to cover the space between the fan 81 and the fan. Further, the fan portion 94 is provided with a shaft cover portion 95 which is protruded in an arc shape in the same manner as the outer peripheral curvature of the rotating shaft 84 and engages with the wire cutout portion 89 of the rotating shaft 84 to close it. The rotation shaft 84 is formed in a substantially cylindrical shape by the lid 95 engaging with the wiring cutout 89.

On the upper surface of the cover portion 76 on the side of the communication rotating portion 75, a pair of locking flanges 97 projecting in the horizontal direction with the axial direction of the communication tube portion 73 located in the front-back direction. , 97 are provided in a pair. These locking flanges 97, 97
As shown in FIG. 12, the communication pipe 73 is provided on the upper surface of the distal end of the shaft support 27, 27 in a state where the axial direction of the communication pipe 73 is located along the horizontal direction which is the lower surface of the suction port main body 14. The hooks 98 can be engaged with the hooks 98, 98, respectively.

Furthermore, a pair of wall-shaped locking claws 99 along the axial direction are provided on the communicating pipe portion 73 at radial positions along the horizontal direction with the axial direction along the front-rear direction. It is protruding. Then, as shown in FIGS. 13 and 14, the locking claw portions 99, 99 are arranged such that the communication pipe portion 73 is located along the longitudinal direction of the case body 24, and the shaft support portions 27,
The hook 27 can be engaged with a hook claw 98 provided on the upper surface of the tip.

On the other hand, the joint 72 is a suction pipe of the connecting pipe 51.
54 has an inner tube portion 101 as an air passage tube portion rotatably held by fitting therein and an outer tube portion 102 as a large-diameter connection tube portion coaxially with the inner tube portion 101. Part 101 and outer tube
A double pipe portion 104 having a gap 103 between the two pipes 102, and an upper joint portion protruding in a substantially hemispherical shape on a half circumference of one end edge of the double pipe portion 104
And a substantially hemispherical lower joint 106 which covers the lower surface of the upper joint 105 and is integrally attached by screwing or the like.
It is composed of On the inner surface of the inner pipe portion 101, a rotation regulating rib (not shown) is formed to protrude in a wall shape over substantially a half circumference, and an end portion is provided with a rotation regulating rib (not shown) in which the rotation regulating projection of the connecting pipe portion 51 abuts. On the other hand, the joint portion 72 is rotatably supported in an angle range of approximately 180 °.

Further, the upper joint 105 and the lower joint 106
Are provided with a pair of substantially parallel partition ribs 110, 110 protruding in a vertical wall shape that are opposed to each other and whose leading ends are joined. An air passage space 111 for accommodating the communication rotating portion 75, and a pair of inner chambers 112, 112 formed respectively in the left and right directions of the air passage space 111 are formed. The partition ribs 110, 110 have cutouts in a substantially semicircular shape at the joining edges.
Notches 114, 114 are formed opposite to each other, and these notches 114, 114 form substantially circular bearing holes 115, 115 which rotatably support the rotating shafts 84, 84 of the communication pipe 73, respectively. .

The rotating shaft provided with the wiring cutout 89
The inner chamber 112 on the bearing hole 115 side that supports the
A communication insertion hole 117 communicating with the gap 103 of No. 4 is provided. Further, in the partition rib 110 on the side where the communication insertion hole 117 is provided, a part of the cutout portion 114 is cut out to form the inner chamber 112.
A communication notch 118 is provided for communicating the air passage space 111 with the air passage space 111. The wiring chamber 77 in the cover 76 includes a wiring path chamber 91 in the wiring cover 92, a wiring opening 88, and a rotating cylinder 80.
Space between the cable and the wrapper section 81, the wiring cutout section 89, the rotating shaft
84 inner circumference, communication notch 118, inner chamber 112, communication insertion hole 117
, The gap 103 in the double pipe section 104, the electric wire insertion hole 61 in the connecting pipe section 51
Through the circuit chamber 34 in the case body 24.

The upper joint portion 105 and the lower joint portion 106 have an upper notch portion 120 and a communication pipe portion 73 which are formed in a substantially U-shape at opposing positions in a portion located in the air passage space portion 111.
The upper cutout 120 and the lower cutout 121 form a relief portion for the communication pipe 73 to turn in the vertical direction.

The communication pipe 71 has a communication pipe portion 73 at one end.
The extension tube 13 is provided with the tip protruding from the cover 76 of the
A lead wire provided with a terminal pin 125 connected to a connector (not shown) provided at an end of
From inside, the wiring path chamber 91 in the wiring cover 92, the wiring opening 8
8, a space portion between the rotating tubular portion 80 and the wrapper portion 81, a wire cut portion 89, an inner periphery of the rotating shaft 84, a communication cutout portion 118, an inner chamber 112,
The communication insertion hole 117, the gap 103 between the double pipe portions 104, the connection pipe portion 51
Is disposed in the circuit chamber 34 in the case body 24 via the electric wire insertion hole 61. The communication pipe 71 is a cylindrical part of the communication pipe 73.
74 is detachably connected to the cleaner main body 1 via the extension pipe 13 and the hose 8, and the suction port 30 is connected to the connection port 9 of the cleaner main body 1.
Communicate with

Further, in the case body 24, a rotary cleaning body 13 as a rotating body rotatably supported by bearings (not shown) provided at both ends in the left-right direction of the suction chamber 31 is provided.
0 is arranged. This rotary cleaning body 130 has a shaft
131, a shaft support member 132 rotatably provided at one end of the shaft 131 and removably attached to a bearing, a pulley 133 integrally provided at the other end of the shaft 131, and a shaft 131. A spirally provided concave groove-shaped blade mounting groove 134, a cleaning member having an edge attached to the blade mounting groove 134, provided in a wall-shaped spiral shape on the outer peripheral surface of the shaft 131, and having a distal end curved to one side. As a blade
135 and a blade portion 137 having a cloth blade 136 having a raised surface on the surface in the direction in which the rotary cleaning body 130 is rotated. 1, 2, 6 and 7 show the blade 135 and the cloth blade for convenience of explanation.
136 is shown in a straight line. The tip of the blade 135 has a beating portion that bulges out in the direction opposite to the bending direction and becomes thicker.
138 are provided.

The rotary cleaning body 130 has a lower end located above the plane formed by the driven front wheel 63a and the driven rear wheel 65, facing the suction port 30, and is in contact with a flat floor plate. The blade 135 contacts the carpet, which is the uneven floor surface that enters the suction port 30, and the cloth blade 136
It is located below a plane formed by the rear wheel 63a and the driven rear wheel 65, and is disposed so as to be in contact between the plates and to be floored.

A drive means 147 for rotating the rotary cleaning body 130 is provided in the drive chamber 33 of the case body 24. The driving means 147 includes a motor case 148, an electric motor 149 housed in the motor case 148, and a rotation transmitting member (not shown) which is detachably engaged with the pulley 133 of the rotary cleaning body 130.

On the other hand, a control circuit (not shown) for controlling the driving state of the electric motor 149 by connecting an electric motor 149 via a power supply line 150 is mounted in the circuit chamber 34 of the case body 24, and leads and wires are connected. A circuit board 163 to be provided is provided. Then, the circuit chamber 34 becomes a lead wire accommodating chamber for accommodating the slack of the lead wire. It should be noted that there is no projection or the like at which the lead wire 60 is hooked at the portion where the loosened lead wire 60 is located. That is, for example, electrical components mounted on the circuit board 163 are provided only on one side of the printed circuit board,
The circuit board should be placed with this one side facing downward.
It is preferable that the lead wires and the soldered portions of the electric components do not protrude from the upper surface of the 163.

In the floor detection chamber 35, a circuit board 163 is provided.
A floor detecting means 165 connected to the electric wire 57 wired through the electric wire wiring passage 58 is provided. The floor detecting means 165 has a wheel receiver 168 which has a rotatable wheel 166 and which is rotatably supported by a shaft member 167 on a side supporting the wheel.
The wheel receiver 168 is constantly urged downward to
A biasing means (not shown) such as a torsion spring or a leaf spring that allows the wheel 166 to advance and retreat from the lower surface of the wheel 166, and a lower end of the wheel 166 is positioned at a predetermined position, for example, the driven front wheel 63a and the driven rear wheel 65.
And a detection switch 169 for detecting that the projection is lower than the plane formed by. When the detection switch 169 detects that the lower end of the wheel 166 protrudes below a plane formed by the driven front wheel 63a and the driven rear wheel 65, the floor detection means 165 sends the signal to the control circuit of the circuit board 163. Control to stop the driving of the electric motor 149.

Further, at the end of the intake lid 46 of the upper case 22 on the drive chamber 33 side, a light emitting diode (not shown) connected to a circuit board 163 which is lit when the electric motor 149 is driven is turned on. A display window 170 is provided to face the member.

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

At the time of cleaning, the suction port main body 14 is connected to the cleaner main body 1 via the extension pipe 13 and the hose 8. With this connection, the terminal pin 125 of the suction port body 14 is connected to a connector (not shown) of the extension pipe 13, and the electric motor 149 in the suction port body 14 is connected to the power supply line 150, the circuit board 163, the lead wire, the extension pipe 13 and Power is supplied by being electrically connected to the cleaner main body 1 via a power supply line (not shown) provided in the hose 8. In this state, the electric blower is appropriately driven in a desired driving state and the electric motor 149 is driven by operating the switch 16 of the operating means 17 while holding the grip 15 of the hose 8. When the electric motor 149 is driven, the upper case
Lighting of the lighting member is recognized through the 22 display windows 170,
This indicates that the electric motor 149 is being driven.

By driving the electric blower, the inside of the suction chamber 31 communicating with the negative pressure side of the electric blower becomes negative pressure, and
From the rotating cleaning body 130.
The rotating cleaning body 130 is rotated by hitting the blade 135 and the cloth blade 136 of the rotation. This intake air flow is supplied to the rotary cleaning body 130.
After being sprayed substantially perpendicularly to the blade 135 and the cloth blade 136, the rotating cleaning body 130 rotates so that it gathers toward the air passage chamber 32 at the center of the case body 24 along the axial direction of the rotating cleaning body 130. It acts on the communication pipe 71 while acting over a long distance to increase the rotational torque. In addition, when the electric motor 149 is driven, the rotary cleaning body 130 is rotated via the rotation transmitting member. As described above, the rotation cleaning body 130 rotates with a large torque by the rotation by the intake air flow and the rotation by the driving of the electric motor 149.

Then, the gripper 15 of the hose 8 is pushed to move the suction port main body 14 back and forth on the floor surface. When the suction port main body 14 travels on the floor, the first cleaning mode is such that the axial direction of the communication pipe 71 is along the front-rear direction, which is the traveling direction of the suction port main body 14.

When the suction port main body 14 travels on the floor surface, when the floor surface is a carpet or the like, the hitting portion 138 of the blade 135 of the rotating rotary cleaning body 130 hits the floor surface and blows out dust. The blade 135 scrapes out or sweeps off the dust, and sucks in dust from the suction port 30. When the floor surface is relatively flat, such as between a board and a tatami mat, the cloth blade 136 of the rotating rotary cleaning body 130 sweeps dust on the floor surface while polishing the floor surface, and sucks the dust through the suction port 30. Further, at the position of the lower surface of the case body 24 where the suction port 30 is not opened, the brush body 42 and the cleaning body 43 scrape or sweep up dust from the floor surface. In addition, since the brushing is implanted in the cleaning body 43 in the forward direction, the gripping portion of the hose 8 is used.
When the suction port body 14 is pushed forward with the grip 15, the raised hairs become reverse hairs and scrape out dust efficiently. Further, when the suction port main body 14 is retracted, a force is applied to lift the suction port main body 14, so that the cleaning body 43 sweeps the dust so as to polish the floor surface.

Further, the side of the suction port main body 14, especially the driving chamber 33
Dust on one side increases the distance to the suction port 30 due to the first
Is sucked into the suction port 30 through the communication concave portion 38 of the second member. Further, the air passage between the brush body 42 and the cleaning body 43 communicates with the suction port, and the negative pressure increases even in the portion where the driving means 147 is located, so that dust is efficiently absorbed even from one side.

The dust sucked in with the air is
It flows into the dust collecting chamber of the cleaner body 1 via the extension pipe 13 and the hose 8 and is captured.

On the other hand, when cleaning a relatively narrow gap between furniture and the like, that is, when cleaning a floor having a width dimension in which the horizontally long suction port body 14 cannot travel, as shown in FIGS. The communication pipe 71 is rotated so that the axial direction of the pipe 71 is along the longitudinal direction of the suction port main body 14, and the engaging claw 99 of the communication pipe 71 is engaged with the hook claw 98 of the case body 24, thereby connecting the communication pipe. The second cleaning mode is changed by changing the cleaning mode so that the longitudinal direction of the suction port body 14 becomes the running direction by restricting the rotation of the suction port 71. Then, in this state, the suction body 14
Clean by sliding.

In addition, cleaning a relatively low place such as under the furniture, that is, a place where the height of the case body 24 is higher than the height dimension of the case body 24 but the communication pipe 71 or the extension pipe 13 may collide with. 27, the communication pipe 71 is rotated so that the axial direction of the communication pipe 71 is along the horizontal direction which is the lower surface of the suction port main body 14, as shown in FIGS. 97 is engaged with the hooking claw 98 of the case body 24 to restrict the rotation of the communication pipe 71 to change the cleaning mode to the third cleaning mode. Then, in this state, the suction port main body 14 is cleaned by sliding the suction port main body 14 into a gap portion such as under furniture.

The cleaning mode is changed from the first cleaning mode to the second cleaning mode.
When the cleaning mode is changed to the third cleaning mode or the third cleaning mode, the electric wire insertion hole 61 of the connecting pipe portion 51 through which the lead wire is inserted and the communication insertion hole 117 of the joint portion 72 are not opposed to each other. The distance between the holes 117 increases. The lead wire corresponding to the increase in the distance moves so as to be drawn out of the circuit chamber 34, and the lead wire does not break. Further, when the cleaning mode is changed to the first cleaning mode again, the wire insertion hole 61 and the communication insertion hole 117 are opposed to each other to reduce the distance therebetween, and the surplus of the lead wire depends on the rigidity of the lead wire itself. It is housed in the circuit room 34 again.

When the hose 8 is placed on the floor surface due to the interruption of the cleaning, or when the dust clogged in the suction port 30 is removed, and when the rotary cleaning body 130, the driven front wheel 63 a, and the driven rear wheel 65 are littered, When the lower surface of the suction port main body 14 is separated from the floor surface for removal, the floor surface detection means 165 projects the wheel 166 from a predetermined position by the urging of the urging means, that is, the driven front wheel 63a and the driven rear wheel 65 When the detection switch 169 detects that the floor has been protruded below the plane to be formed and the floor surface is no longer detected, the control circuit of the circuit board 163 separates the bottom surface of the suction port main body 14 from the floor surface and lifts the floor surface. It is determined that no detection is made, and the drive of the electric motor 149 is stopped. When the lower surface of the suction port main body 14 is separated from the floor surface, the suction chamber 31
The inside negative pressure is also reduced, and the amount of intake air from the intake port 48 is also reduced. By stopping the drive of the electric motor 149 and reducing the amount of intake air, the rotation of the rotary cleaning body 130 stops.

When the suction port main body 14 is moved on the floor surface for cleaning, lint and hair may be deposited on the driven rear wheel 65 whose pivotal support position is closest to the floor surface where dust accumulates. Easy to get entangled. For this reason, the small-ring portion 69 is entangled with the outer peripheral surface thereof, so that lint and hair and the like entangled with the small-ring portion 69 are removed while rotating the small-ring portion 69.

Since the end surface of the small wheel portion 69 and the side wall surface 66a of the driven rear wheel chamber 66 are parallel and substantially in contact with each other, it is difficult for lint and the like to enter, and the rear wheel shaft 67 is entangled. Almost no.

As described above, the shaft support tube portion 68b is integrally and coaxially protruded from the axial end surface of the rear wheel portion 68 rotatably supported by the rear wheel shaft 67. 68b to rear wheel 68
The rear wheel portion 68 and the small wheel portion 69 substantially cover the rear wheel shaft 67 between the side wall surfaces 66a of the driven rear wheel chamber 66 and rotatably support the small wheel portion 69 having a smaller diameter than the rear wheel portion 68. Are rotatable independently of each other, for example, even if the lint or the like is entangled in the small wheel portion 69, the small wheel portion 69 can be removed by rotating only the small wheel portion 69, and the tangled yarn and the like can be easily removed, and the rear wheel portion 68 and Even if lint or the like enters between the small wheel portions 69, it becomes entangled with the shaft support tube portion 68b and does not entangle with the rear wheel shaft 67.
It is possible to prevent the rotation of the 68 from being impaired, and it is possible to improve the cleaning property and the maintainability.

The side wall surface 66 of the driven rear wheel chamber 66 of the small wheel portion 69
The flange 69a protrudes from the end edge facing a.
With a simple configuration, lint and the like that get entangled in the small wheel
From the rear wheel chamber 66 and the side wall surface 66a of the driven rear wheel chamber 66, and can be prevented from being entangled with the rear wheel shaft 67.

Further, a protective sheet 68d formed of a flexible member such as a brushed cloth provided on the outer peripheral surface for suppressing generation of noise during traveling and preventing damage to the floor surface is provided. Since the small rear wheel portion 69 is provided on the driven rear wheel 65 provided,
Even if the protection sheet 68d, which is apt to be entangled with lint and the like, is provided, the lint and the like do not entangle with the rear wheel shaft 67, so that it is possible to prevent running performance from being impaired.

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, and the like, and the vacuum cleaner body 1 and the suction port The present invention can also be applied to a self-propelled vacuum cleaner or the like in which the main body 14 is integrated.

Further, the joint pipe 72 and the communication pipe section 73 are provided with the communication pipe 71 which is rotatable so as to be selectable between a position along the longitudinal direction of the case body 24 and a position along the longitudinal direction of the case body 24. However, any configuration such as a configuration in which the communication pipe portion 73 is rotatably supported on the case body 24 may be used.

Further, the rotary cleaning body 130 is driven to rotate. For example, the traveling wheel is driven to rotate instead of the rotary cleaning body 130, or the running wheel is driven to rotate together with the rotary cleaning body 130 so that the suction port body 14 is driven. Configuration to improve the performance,
A configuration without a rotating body such as the rotary cleaning body 130 or the running wheel may be employed. Further, the rotating cleaning body 130 is not limited to one, and may be driven to rotate a plurality of times. In addition to the blade 135, a rotating brush having a raised wall in a wall shape, a rotating brush provided with a cloth blade, a brush or a cloth blade 136 and any of the cleaning members in combination with the blade 135 may be provided.

Further, as a configuration for transmitting the drive of the electric motor 149 to the rotary cleaning body 130, the rotation can be transmitted to the output shaft 155 by sliding in the axial direction with a gap and engaging in the circumferential direction. Either configuration may be used. In a configuration without a rotating body, a driving unit such as the electric motor 149 or an air turbine may not be used.

Further, the rotary cleaning body 130 may be configured to rotate in the opposite direction, and the rotation direction may be switched in accordance with the running direction of the suction port main body 14.

Furthermore, although the description has been made with the surplus lead wires 60 housed in the circuit chamber 34, a configuration without driving means may not be provided with a circuit board, and may be a configuration without lead wires.

The brush body 42 and the cleaning body 43 are provided on the front lower surface and the rear lower surface in the traveling direction of the case body 24 with respect to the position where the driving means 147 is provided. May be provided on the lower surface, or only the brush body 42 or the cleaning body 43 may be provided on both front and rear sides, and the brush body 42 and the cleaning body 43 may not be used.

On the other hand, a plurality of intake ports 48 have been described.
Only one may be provided, and the intake port 48 may not be provided.

Further, the first communication recess 38 and the second communication recess 39 need not be provided.

In the above description, the driven rear wheel 65 is provided with the small wheel portion 69. However, the driven front wheel 63a is provided with the small wheel portion 69 as a wheel to prevent lint and the like from becoming entangled with the front wheel shaft 63b as an axle. It may be configured.

Next, another embodiment of the present invention will be described with reference to FIG.

The embodiment shown in FIG. 16 is similar to the embodiment shown in FIG.
In addition, the driven rear wheel 65 of the embodiment shown in FIG.

That is, as shown in FIG. 16, the driven rear wheel
On both end surfaces in the axial direction of the rear wheel portion 65, only the engagement groove portion 68c is provided, and the shaft support tube portion 68b is not provided. Also,
The small wheel portion 69 is a substantially cylindrical shape having a small wheel bearing hole 69c into which a rear wheel shaft 67 is rotatably fitted on a central axis, and a flange portion 69a protruding outward at an outer peripheral edge at one axial end. The outer peripheral edge of the other end is integrally provided with an engagement cylinder portion 69b which is substantially coaxially cylindrical and rotatably fits into and engages with an engagement groove portion 68c of the rear wheel portion 68. Furthermore, on the inner peripheral surface of the small wheel portion 69,
A large-diameter bearing hole 69d having an inner diameter larger than that of the small wheel bearing hole 69c is provided on the side where the engagement cylinder portion 69b is provided. When the small wheel portion 69 is supported by the rear wheel shaft 67, the large-diameter bearing hole 69d becomes a spring housing space 182 for housing a coil spring 181 as a biasing means.

The coil spring 181 accommodated in the spring accommodating space 182 is rotatably supported by inserting the rear wheel shaft 67 into the center shaft, one end of which is in contact with one end surface of the rear wheel portion 68 and the other end thereof. The small ring part 69 whose side is formed by the large-diameter bearing hole 69d
And urges the small wheel portion 69 in the direction away from the rear wheel portion 68, and the end surface of the small wheel portion 69 on the side where the flange portion 69a is provided is formed by the driven rear wheel chamber 66. The surface is pressed against the side wall surface 66a.

Therefore, even at the driven rear wheel 65 where the shaft support position is closest to the floor where dust accumulates, lint and hair are likely to be entangled, the small wheel portion 69 has the side wall surface 66 of the driven rear wheel chamber 66.
a, the gap is not formed by pressing against the surface of the rear wheel shaft 67, and the dust can be prevented from being entangled with the rear wheel shaft 67 from the gap between the small wheel portion 69 and the side wall surface 66a of the driven rear wheel chamber 66. It is possible to prevent the rotation from being restricted, so that the running performance is not impaired, and the cleaning property and the maintenance management property can be improved.

In addition, the substantially cylindrical engaging cylinder 69b rotatably fitted into and engaged with the engaging groove 68c of the rear wheel section 68 causes thread dust to enter the position of the coil spring 181 and become entangled. Can be reliably prevented.

Next, still another embodiment of the present invention will be described with reference to FIGS.

The embodiment shown in FIGS. 17 and 18 has another structure provided in place of the coil spring 181 as the urging means shown in FIG.

That is, as shown in FIGS. 17 and 18, the bearing hole 68a of the rear wheel portion 68 is formed to have a diameter larger than the diameter of the rear wheel shaft 67, and the rear wheel portion 68 is movable in the radial direction. It is pivoted. On both end surfaces in the axial direction of the rear wheel portion 68, engaging recesses 185 are provided which are substantially coaxial with the bearing holes 68a and have a larger diameter than the bearing holes 68a.

On the other hand, the small wheel portion 69 has a rear shaft
67 is a substantially cylindrical shape having a small wheel bearing hole 69c into which it is rotatably inserted, and a flange portion 69a protruding outward is provided at an outer peripheral edge at one end in the axial direction. An inclined surface 186 having a gradually decreasing diameter is provided.
The portion provided with is a conical portion 187. Note that the conical portion 187 has a diameter dimension at the tip of the engagement concave portion 18 of the rear wheel portion 68.
5 is formed to have a diameter smaller than the inner diameter of the engagement recess 185 so as to be insertable into the inside. The conical portion 187 having the inclined surface 186 and the engaging concave portion 185 constitute a pressing means 189 as urging means.

The distance between the side wall surfaces 66a, 66a of the driven rear wheel chamber 66 is shorter than the sum of the axial width of the rear wheel portion 68 and the axial width of the two small wheel portions 69, and The rear wheel portion 68 is formed to be longer than the sum of the axial width size of the rear wheel portion 68 and the axial width size not including the conical portions of the two small wheel portions 69.

When the lower surface of the suction port main body 14 is separated from the floor surface 190, the rear wheel 68 is held while riding on the end of the small wheel 69 and the conical portion 187, as shown in FIG. Is done.

When cleaning, the suction main body 14 is placed on the floor 190.
When placed on top, the rear wheel portion 68 is pressed against the floor surface via the rear wheel shaft 67 by the weight of the suction port main body 14, and the rear wheel portion 68 moves relatively upward with respect to the case body 24. The rear wheel shaft 67 is in contact with the inner peripheral bearing hole 68a.

As described above, since the dimensions of the driven rear wheel 65 and the driven rear wheel chamber 66 are formed in a predetermined dimensional relationship, the movement of the rear wheel portion 68 causes the rear wheel portion 68 to become smaller. Ring 6
The small wheel portion 69 is moved so that the edge of the engaging recess 185 abuts on the inclined surface 186 of the conical portion 187 of the small wheel portion 69 without being dropped between the small wheel portions 9 and 69, and is pushed out in the direction away from the small wheel portion 69. The end surface of the portion 69 on the side where the flange portion 69 a is provided is pressed against the side wall surface 66 a of the driven rear wheel chamber 66.

Therefore, similarly to the embodiment shown in FIG. 16, dust can be prevented from being entangled with the rear wheel shaft 67 from the gap between the small wheel portion 69 and the side wall surface 66a of the driven rear wheel chamber 66.
It is possible to prevent the rotation of the rear wheel portion 68 from being restricted, so that the traveling performance is not impaired and the cleaning performance and the maintenance management performance can be improved.

In the structure shown in FIGS. 17 and 18, the number of parts is reduced as compared with the case where the separate coil spring 181 shown in FIG. 16 is used, and the manufacturability can be improved, and the rear wheel portion can be improved. With a simple configuration in which an engagement recess 185 is provided in the small wheel portion 69 and a conical portion 187 having an inclined surface 186 is provided in the small wheel portion 69, dust is reduced by the small wheel portion 69 and the side wall surface 66 of the driven rear wheel chamber 66.
It is possible to prevent the rear wheel shaft 67 from becoming entangled with the gap between the gaps a, and to prevent the rotation of the rear wheel portion 68 from being restricted, so that the traveling performance is not impaired and the cleaning performance and the maintenance management performance can be improved.

[0095]

According to the suction port body of the vacuum cleaner according to the first aspect of the present invention, the wheel support section rotatably covers the axle on the shaft support section integrally projecting from the axial end of the wheel section. Because the smaller wheel portion is pivotally supported, the wheel portion and the small wheel portion can rotate independently of each other.For example, even if the small wheel portion is entangled with lint or the like, only the small wheel portion with respect to the wheel portion. It can be rotated to remove lint that easily gets entangled, and even if lint enters between the wheel and the small wheel, it gets entangled with the axle support and does not get tangled with the axle, thus impairing the rotation of the wheel. Can be prevented, and the wheels can rotate stably.

According to the suction port body of the vacuum cleaner according to the second aspect, the small wheel portion which is smaller in diameter than the wheel portion and which is rotatably supported by covering the axle is pressed against the inner surface of the wheel chamber by the urging means. Therefore, for example, even if lint or the like is entangled in the small wheel portion, the small wheel portion can be rotated to remove the easily entangled yarn dust and the like, and the lint and the like enter between the small wheel portion and the inner surface of the wheel chamber. It can prevent entanglement with the axle, and the wheels can rotate stably.

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 second aspect, the wheel portion of the small wheel portion is opposed to the wheel portion. To provide a conical portion having an inclined surface that presses the small wheel portion against the inner surface of the wheel chamber by contacting an edge of the concave portion with a substantially conical shape that can be inserted into a concave portion provided on the end surface on the small wheel portion side of the spring, In a state where the wheel is in contact with the ground with a simple configuration without using a separate member such as a member, it is possible to press the small wheel portion against the inner surface of the wheel chamber and prevent the lint from being entangled with the axle.

According to the suction port of the vacuum cleaner according to the fourth aspect, in addition to the effect of the suction port of the vacuum cleaner according to any one of the first to third aspects, in addition to the effect of the suction port of the small wheel section, With a flange that protrudes outward at the opposite end edge, a simple structure prevents lint that is entangled with the small wheel portion from falling from the small wheel portion to the inner surface of the wheel chamber and is entangled with the axle. Can be prevented.

According to the fifth aspect of the present invention, the rotation of the driven wheel can be prevented from being impaired by the entangled thread dust and the like, and the entangled thread dust and the like can be easily removed. Since the suction port of the electric vacuum cleaner is provided, the cleaning property and the maintenance management property can be improved.

[Brief description of the drawings]

FIG. 1 is a rear view of a suction port main body according to an embodiment of the present invention, in which a portion near a driven rear wheel is partially cut away.

FIG. 2 is a perspective view showing the main body of the electric vacuum cleaner.

FIG. 3 is a plan sectional view of the suction port main body.

FIG. 4 is a side sectional view of the suction port main body at a central position.

FIG. 5 is a side sectional view near the end of the suction port main body.

FIG. 6 is a plan view showing the suction port main body.

FIG. 7 is a front view of the same.

FIG. 8 is a rear view of the same.

FIG. 9 is a side view of the same.

FIG. 10 is a bottom view of the same.

FIG. 11 is a plan view showing an inlet main body in a second cleaning mode according to the second embodiment;

FIG. 12 is a rear view of the same.

FIG. 13 is a plan view showing an inlet main body in a third cleaning mode according to the third embodiment;

FIG. 14 is a rear view of the same.

FIG. 15 is a perspective view showing the driven rear wheel.

FIG. 16 is a rear view of a suction port main body according to another embodiment of the present invention, in which a portion near a driven rear wheel is partially cut away.

FIG. 17 is a rear view of a suction port main body according to still another embodiment of the present invention, in which a portion near a driven rear wheel of a suction port main body is partially cut away.

FIG. 18 is a rear view of the suction port main body mounted on the floor, with a part of the vicinity of a driven rear wheel cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 14 Suction port main body 24 Case body 30 Suction port 65 Driven rear wheel which is a wheel 66 Driven rear wheelroom which is a wheel room 67 Rear wheel shaft which is an axle 68 Rear wheel part which is a wheel part 68b Shaft support part 69 Small wheel part 69a Flange part 181 Coil spring as urging means 185 Engaging concave part which is concave part 186 Inclined surface 187 Conical part 189 Urging means 190 Floor surface to be cleaned

Claims (5)

[Claims] 1. A case body having an inlet opening on a surface facing a surface to be cleaned, and a wheel chamber provided in the case body and rotatably disposed on the surface to be cleaned so as to run on the surface to be cleaned. The wheel comprises: an axle having at least one end in the axial direction attached to the case body; and an axial support cylinder portion rotatably supported by the axle and protruding substantially coaxially and integrally at an axial end. A wheel portion whose peripheral surface is in contact with the surface to be cleaned; and a small wheel portion that covers the axle and is rotatably supported by the shaft support tube portion and is smaller in diameter than the wheel portion. Vacuum cleaner suction body. 2. A case body having an inlet opening on a surface facing a surface to be cleaned, and a wheel chamber provided on the case body and rotatably disposed on the surface to be cleaned so as to run on the surface to be cleaned. An axle, at least one end of which in the axial direction is attached to the case body; a wheel portion rotatably supported by the axle, and a peripheral surface contacting the surface to be cleaned; and an axle covering the axle. A small wheel portion rotatably supported by the wheel portion and having a smaller diameter than the wheel portion; and a biasing means for pressing the small wheel portion against the inner surface of the wheel chamber. . 3. The urging means includes a concave portion provided on an end surface of the wheel portion on the side of the small wheel portion, and a bias portion provided on an end surface of the small wheel portion facing the wheel portion, and a tip portion can be inserted into the concave portion. 3. A vacuum cleaner according to claim 2, further comprising: a conical portion formed in a substantially conical shape and having an inclined surface which abuts on an edge of said concave portion and presses said small wheel portion against an inner surface of a wheel chamber. Mouth body. 4. The electric device according to claim 1, wherein the small wheel portion is provided with a flange portion protruding outward at an end edge facing the inner surface of the wheel chamber. Vacuum cleaner suction body. 5. A vacuum cleaner comprising: a vacuum cleaner main body; and a suction port of the vacuum cleaner according to claim 1, which is connected to the vacuum cleaner main body.