JP6920282B2 - Vacuum cleaner suction port - Google Patents

Description

The present invention relates to a suction port body of a vacuum cleaner.

As a conventional vacuum cleaner, Patent Document 1 provides a suction port main body having a bottom surface provided with a suction port extending in the left-right direction, and a suction port main body that is swingably provided around the axis in the left-right direction at the rear portion of the suction port main body. A canister equipped with a suction port body having a connecting pipe portion, a rotary brush rotatably provided around the axis in the left-right direction at the suction port in the suction port body, and a rotary brush motor for rotating the rotary brush. A type of vacuum cleaner has been proposed.

Further, Patent Document 2 proposes a stick-type vacuum cleaner provided with a suction port having the same configuration as that of the suction port of Patent Document 1.
In such an electric vacuum cleaner, the rotation of the rotating brush can scrape dust on the floor surface into the suction port and reduce the force when the user advances the suction port body forward.

Japanese Unexamined Patent Publication No. 2014-33934 Japanese Unexamined Patent Publication No. 2015-144785

When a user who cleans using a stick-type vacuum cleaner as in Patent Document 2 temporarily leaves the place, the power of the vacuum cleaner is usually turned off to drive an electric blower and a rotating brush in the vacuum cleaner body. The motor will be stopped and the vacuum cleaner will be leaned against the wall or furniture in the room, or the vacuum cleaner will be laid down on the floor.

On the other hand, there is also a user's request to make the vacuum cleaner stand on its own by swinging the connection pipe part of the suction port to about 90 ° with respect to the floor surface instead of the above-mentioned placement. There is a problem. That is, if the vacuum cleaner is made to stand on its own while the rotating brush is rotating, the suction port will move forward and fall down, and the vacuum cleaner body will fall on the floor and be damaged. The motor must be stopped reliably. However, since the rotation brush motor is stopped by the user's power-off operation, it is assumed that the vacuum cleaner is to be made independent without this operation.

In addition, a suction port body provided with a drive roller to improve the running performance has also been proposed. In this case as well, the drive roller motor must be surely stopped before the vacuum cleaner can stand on its own. Since the stop of the roller motor also depends on the user's power-off operation, it is assumed that the vacuum cleaner will try to stand on its own without this operation.

The present invention has been made in view of such a problem, and a suction port of an electric vacuum cleaner capable of automatically stopping the rotary brush motor and / and the drive roller motor when the connecting pipe swings to a predetermined angle. The purpose is to provide the body.

According to the present invention, the suction port bodies of the following vacuum cleaners (I) to (III) are provided.

(I) According to the present invention, a suction port main body having a bottom surface provided with a suction port extending in the left-right direction and a connecting pipe provided at the rear portion of the suction port main body so as to be swingable around an axial center in the left-right direction. A rotary brush that is rotatably provided around the axis in the left-right direction at the suction port of the suction port main body, a rotary brush motor that rotationally drives the rotary brush, and a drive of the rotary brush motor. Equipped with a posture detection switch to switch the stop
The posture detection switch is a suction port body of an electric vacuum cleaner configured to switch the rotary brush motor from drive to stop when the connection pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface. Is provided.

(II) According to the present invention, a suction port main body having a bottom surface provided with a suction port extending in the left-right direction and a connecting pipe provided at the rear portion of the suction port main body so as to be swingable around an axial center in the left-right direction. A drive roller rotatably provided on the bottom surface side of the suction port main body, a drive roller motor for rotationally driving the drive roller, and an attitude detection switch for switching between driving and stopping of the drive roller motor. Prepare,
The posture detection switch is a suction port body of an electric vacuum cleaner configured to switch the drive roller motor from drive to stop when the connection pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface. Is provided.

(III) According to the present invention, a suction port main body having a bottom surface provided with a suction port extending in the left-right direction and a connection pipe oscillatingly connected to the rear portion of the suction port main body around an axial center in the left-right direction. A rotary brush that is rotatably provided around the axis in the left-right direction at the suction port of the suction port main body, a rotary brush motor that rotationally drives the rotary brush, and a bottom surface side of the suction port main body. It is provided with a rotatably provided drive roller, a drive roller motor for rotationally driving the drive roller, and an attitude detection switch for switching between driving and stopping of the rotary brush motor and the drive roller motor.
The posture detection switch is an electric configuration that switches the rotary brush motor and the drive roller motor from drive to stop when the connection pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface. A vacuum cleaner inlet is provided.

When the connecting pipe portion of the suction port body swings to a predetermined angle with respect to the suction port body and becomes a vertical state, that state is detected by the posture detection switch. Therefore, a suction port body having a rotary brush and a motor for a rotary brush, a suction port body having a drive roller and a motor for a drive roller, or a motor for a rotary brush and a rotary brush and a motor for a drive roller and a drive roller are provided. In the suction port body, when the connecting pipe portion is in the vertical state, the drive of the rotary brush motor and / and the drive roller motor can be automatically stopped. Therefore, the rotating brush and / and the drive roller can be automatically stopped when the stick-type vacuum cleaner in operation is made independent, so that the suction port is self-propelled and the vacuum cleaner in the independent state balances. It is possible to prevent problems such as breaking down and falling down and being damaged.

It is a perspective view of the self-supporting state which shows Embodiment 1 of the vacuum cleaner of this invention. It is a left side sectional view of the self-supporting state of the vacuum cleaner of FIG. It is a perspective view which shows the suction port body of the vacuum cleaner of FIG. It is a bottom view which shows the suction port body of the vacuum cleaner of FIG. It is a left side sectional view which shows the suction port body of the vacuum cleaner of FIG. It is a perspective view which shows the drive roller unit in the suction port body of the vacuum cleaner of FIG. It is an exploded view of the suction port body of the vacuum cleaner of FIG. It is explanatory drawing which shows the rocking state of the connection pipe part in the suction port body of the vacuum cleaner of FIG. 1, (A) is the most descending state, (B) is the most ascending state. It is a perspective view which shows the drive roller in the drive roller unit of FIG. It is a front view of the drive roller of FIG. 9 is a normal cross-sectional view of the drive roller of FIG. (A) is a partially enlarged view of FIG. 11 (A), and (B) is a partially enlarged view of FIG. 11 (B). It is a circuit diagram which shows an example of the operation circuit of the vacuum cleaner which concerns on Embodiment 1. FIG. It is a left cross-sectional view which shows the suction port body of the vacuum cleaner of FIG. .. It is a figure which shows the drive roller in the suction port body of the vacuum cleaner which concerns on Embodiment 2, (A) is a perspective view, (B) is a front view, (C) is a cross section taken along line II of FIG. 15 (B). FIG. 15 (D) is a cross-sectional view taken along the line II-II of FIG. 15 (C).

(Embodiment 1)
FIG. 1 is a perspective view of a self-supporting state showing the first embodiment of the vacuum cleaner of the present invention, and FIG. 2 is a left sectional view of the self-supporting state of the vacuum cleaner of FIG.

<Overall configuration of vacuum cleaner>
The vacuum cleaner 100 includes a vacuum cleaner main body 10 incorporating an electric blower 11, a battery 12, a circuit board, and the like, a dust cup unit 20 detachably attached to the vacuum cleaner main body 10, and a suction port of the vacuum cleaner main body 10. An extension pipe 30 detachably connected to the tubular intake portion 10a and a suction port body 40 detachably connected to the extension pipe 30 are provided, and are configured to be self-supporting as shown in FIGS. 1 and 2. Has been done. In the present specification, the direction in which the suction port 40 moves forward and backward on the floor surface F is the "front-back direction", the direction perpendicular to the floor surface F is the "vertical direction", and the direction parallel to the floor surface F and in the front-rear direction. The direction perpendicular to is defined as the "left-right direction", and the suction port 40 is defined as right and left when viewed from the rear.

The vacuum cleaner main body 10 has a handle 10b and an operation unit 10c provided on the handle 10b, and the operation unit 10c switches between operation and stop by operating the start / stop button SW104 provided on the operation unit 10c. The suction force can be switched strongly or weakly by operating the suction force switching button SW102 provided. During operation, the electric blower 11 is driven, and at the same time, the rotary brush motor and the drive roller motor of the suction port 40, which will be described later, are driven. Although not shown, the vacuum cleaner body 10, the extension pipe 30, and the suction port 40 are electrically connected by a conductive member, and power is supplied from the battery 12 to the electric blower 11, each motor, and the like. A brush member 13 is provided in the intake portion 10a of the vacuum cleaner main body 10 so as to be foldable.

<Structure of suction port>
3 is a perspective view showing the suction port body of the vacuum cleaner of FIG. 1, FIG. 4 is a bottom view showing the suction port body of the vacuum cleaner of FIG. 1, and FIG. 5 is a bottom view of the vacuum cleaner of FIG. It is a left side sectional view which shows the suction port body. Further, FIG. 6 is a perspective view showing a drive roller unit in the suction port body of the vacuum cleaner of FIG. 1, and FIG. 7 is an exploded view of the suction port body of the vacuum cleaner of FIG. Further, FIG. 8 is an explanatory view showing a swinging state of the connecting pipe portion in the suction port body of the vacuum cleaner of FIG. 1, in which (A) is the lowest descending state and (B) is the highest rising state.

[About the suction port]
_{The suction port body 40 has a suction port main body 41 having a bottom surface provided with a suction port 41a 1} extending in the left-right direction (arrow A direction), and can swing around the axis in the left-right direction at the rear portion of the suction port main body 41. A connected connection pipe portion 42, a rotary brush 43 rotatably provided around the axis in the left-right direction at the _{suction port 41a 1} in the suction port main body 41, and a rotary brush motor 44 for rotationally driving the rotary brush 43. A drive roller unit 45 provided on the bottom surface side of the suction port main body 41, an attitude detection switch 46, and a lift detection switch 47 are provided.

The suction port main body 40 includes _{a lower case 41a having a suction port 41a 1} , an upper case 41b, a front case 41c, a bumper 41d, a tubular receiving portion 41e, and a rear case 41f.

The lower case 41a includes _{an upper opening-shaped first space 41s 1} that rotatably stores the rotary brush 43 above the _{suction port 41a 1,} a lift detection switch 47 arranged behind the first space 41s _{1, and rotation.} accommodating the upper opening shaped second space 41s ₂ for accommodating the brush motor 44, behind the second space 41s _2, or the second space 41s ₂ and the drive roller unit 45 portion is arranged overlapping It has a lower opening-shaped third space 41s ₃ and a lower opening-shaped fan-shaped fourth space 41s ₄ arranged behind the third space 41s ₃ (see FIG. 14), and the second space 41s ₂ has. _{A hole 41a 2} is formed to expose a part of the lift detection switch 47 downward to the outside.

The upper case 41b is a _{component that covers the second space 41s 2} and the third space 41s ₃ of the lower case 41a, and at the rear end portion, the connecting pipe portion 42 that is swung to a substantially vertical state is rotated in the twisting direction. A regulation piece 41b ₁ that regulates movement is provided.

The front case 41c is a part _{that covers the first space 41s 1} of the lower case 41a and is a part to which the bumper 41d is attached.
In FIG. 7, reference numeral 41cx is a stopper piece that is detachably attached between the left and right rear ends of the front case and the left and right front ends of the upper case 41b, and the lower case is formed by removing each stopper piece 41cx. The upper case 41b and the front case 41c can be removed from the 41a.

The lift detection switch 47 has a swing lever portion having wheels, a switch body for swingably supporting the swing lever portion, and a torsion coil spring for urging the swing lever portion downward, and has a lower case. The switch body is connected to the circuit board 48 housed in the 41a, and the wheels of the swing lever portion are urged to be exposed downward from the _{hole 41a 2.} The lift detection switch 47 switches to drive the motor when the suction port 40 is on the floor surface F, and to stop driving the motor when the suction port 40 is lifted from the floor surface F. The "motor" referred to here includes the rotary brush motor 44 and the drive roller motor 45b provided in the drive roller unit 45, which will be described later.

The rotary brush 43 has a grooved pulley on one end side thereof, a grooved pulley is fixed to the output shaft of the rotary brush motor 44, and a grooved belt is stretched between these grooved pulleys. As a result, the rotational force of the rotary brush motor 44 is transmitted to the rotary brush 43.

The rear case 41f is connected to an arc-shaped portion that _{fits with the peripheral edge of the third space 41s 3} of the lower case 41a so as to surround the drive roller unit 45 from the rear to the left and right, and the arc-shaped portion. _{It has a fan-shaped portion that fits with the peripheral edge of the fourth space 41s 4} of the lower case 41a, and a pair of left and right rear rollers 49 are rotatably attached to the bottom surface (lower surface) of the fan-shaped portion around the center of the left and right axes. A lower opening-shaped mounting recess is provided for this purpose.

Further, a circular hole is formed between the left and right mounting recesses in the rear case 41f, and a tubular member 41g having a _{convex curved surface portion 41g 1 at the lower end portion so as to project downward from the circular hole is formed in the rear case 41f.} It is provided above.
_{The left and right shaft portions 45d 11} of the drive roller unit 45, which will be described later, are rotatably supported at the left and right positions of the arc-shaped portion of the rear case 41f and the left and right positions of the third space 41s _{3 of the lower case 41a.} A circular rib 41h is provided.

The receiving portion 41e is a component that oscillateably holds the connecting pipe portion 42 around the axis in the left-right direction, and includes a lower member 41e ₁ that can be divided into two and an upper member 41e ₂ .
The lower member 41e ₁ has a circular vent 41e _{11 at the front end and a mounting portion 41e 12} for attaching the posture detection switch 46 to the left end of the semi-cylindrical portion.

The upper member 41e ₂ is formed with a _{notch 41e 21} at the rear end portion so that the connecting pipe portion 42 can swing to a substantially vertical state.
_{The circular outer periphery of the vent 41e 11} of the receiving portion 41e in which the lower member 41e ₁ and the upper member 41e ₂ are assembled fits into the _{semicircular ribs 41e 13} provided in the lower case 41a and the upper case 41b, respectively. It is rotatably attached around the axis in the front-back direction.

[About the connection pipe]
The connection pipe portion 42 includes a tubular main body portion 42a having a ventilation path and an upper cover portion 42b attached to the main body portion 42a, and is around the axis center in the left-right direction with the receiving portion 41e of the suction port main body 41. A connection shaft portion 42x that is swingably connected to the base end side (root side) is provided.

The connecting shaft portion 42x has a convex curved surface on the surface of the connecting pipe portion 42 on the swing direction side (arrow B direction side), that is, a part of the outer surface of the main body portion 42a and a part of the outer surface of the upper cover portion 42b. It is connected to the receiving portion 41e of the suction port main body 41 so as to be swingable around the axis in the left-right direction (direction of arrow B) (see FIG. 2).

The lower cover portion 42a has a protruding switch contact portion 42a ₁ on the left side surface of the base end portion. The switch contact portion 42a ₁ abuts on the lever 46a of the posture detection switch 46 attached to the receiving portion 41e when the connecting shaft portion 42x swings to switch the motor from driving to stopping. The "motor" referred to here includes the rotary brush motor 44 and the drive roller motor 45b provided in the drive roller unit 45, which will be described later.

The upper cover portion 42b has an inclined surface adjacent to the convex curved surface, and _{also has a constricted portion 42b 1} between the inclined surface and the convex curved surface, and the connecting pipe portion 42 is in an inclined state (FIG. 8 (A). )) When swinging from the vertical state (FIG. 8 (B)), the constricted portion 42b ₁ is stopped by hitting the inner portion of the notch portion 41e ₂₁ of the receiving portion 41e, and further swinging is restricted. The "vertical state" of the connecting pipe portion 42 means a state substantially perpendicular to the floor surface F.

[About the drive roller unit]
9 is a perspective view showing the drive roller in the drive roller unit of FIG. 6, FIG. 10 is a front view of the drive roller of FIG. 9, and FIG. 11 is a cross-sectional view of the drive roller of FIG.

The drive roller unit 45 includes a drive roller 45a, a drive roller motor 45b, _{a rotational force transmission mechanism portion having a grooved belt 45c 1} , and a casing 45d for accommodating these, and includes a suction port body 40 and a drive roller unit 45. It is attached to the suction port main body 41 so as to be urged toward the floor surface F side by an urging member (not shown) provided between the two.

Casing 45d includes a first casing 45d _1, comprising a second casing 45d ₂ assembled to the first upper casing 45d _1, and a third casing 45d ₃ assembled to the first lower casing 45d _1.

The first casing 45d _{1 has shaft portions 45d 11} on the left and right side surfaces.
The second casing 45d _{2 has a short tubular recess 45d 21 in} which the lower end portion of the coil spring as the urging member is fitted at the left and right positions on the upper surface.
The third casing 45d _{3 has an opening 45d 31} that projects the drive roller 45a toward the floor surface F side.

The drive roller motor 45b is _{housed in the space between the first casing 45d 1} and the second casing 45d _2, and the drive roller 45a is left and right in the space between _{the first casing 45d 1} and the third casing 45d _3. It is rotatably stored around the axis.

Drive roller 45a includes a rotating member 45a ₁ for coupling with the rotational force transmitting mechanism portion, a cylindrical roller member 45a ₂ provided on the outer peripheral side of the rotary member 45a _1, a rotary member 45a ₁ and the roller member 45a ₂ It has a roller fixing member 45a ₃ provided between the two.

The cylindrical roller fixing member 45a ₃ includes an inner flange portion 45a _{31 provided at both ends in the axial direction and a pair of annular convex portions 45a 32} provided on the outer peripheral surface at predetermined intervals in the axial direction. It is composed of _{a half-split body 45a 33} which has and can be divided into two.
The cylindrical roller member 45a ₂ is fitted between a pair of annular convex portions 45a ₃₂ of the roller fixing member 45a _3.

The rotating member 45a ₁ has a main body 45a _{11 having a pair of outer flange portions 45a 111} provided on the outer peripheral surface at predetermined intervals in the axial direction, and pins and bearings 45a at both ends of the main body 45a _{11 in the axial direction. It} has a support block 45a ₁₃ rotatably attached via 12.

_{A grooved pulley 45a 112} forming a rotational force transmission mechanism is integrally formed _{between the outer flange portion 45a 111} on one end side of the main body portion 45a ₁₁ and the support block 45a _13. Further, inside the pair of outer flange portions 45a _{111 on} the outer peripheral portion of the main body portion 45a ₁₁ , the inner flange portions 45a ₃₁ of the pair of half-split bodies 45a ₃₃ fitted between the pair of outer flange portions 45a ₁₁₁ are fitted. A concave peripheral groove 45a _{113 to} be inserted is formed. It should be noted that one or more notches are formed in a part of the inner flange portion 45a ₃₁ of the half-split body 45a ₃₃ , and one or more protrusions are provided in a part of the _{concave peripheral groove 45a 113.} When the protrusion engages with the notch, the rotating member 45a ₁ and the roller fixing member 45a ₃ are mechanically coupled and integrally rotate.

Examples of the material of the rotating member 45a ₁ include resins such as POM (polyacetal), PET (polyethylene terephthalate), and PTFE (ethylene tetrafluoride), and POM is used in the present embodiment.
Further, as the material of the roller fixing member 45a _{3, a resin having lower organic solvent resistance than the material of the rotating member 45a 1} , for example, ABS (styrene / butadiene / acrylonitrile copolymer), AS (styrene / acrylonitrile copolymer). ), PS (polystyrene) and other resins, and ABS is used in this embodiment.

Examples of the material of the roller member 45a ₂ include rubbers such as silicone rubber, fluororubber, and chlorosulfonated polyethylene rubber, and silicone rubber is used in the present embodiment.
The roller member 45a ₂ may be adhered to the roller fixing member 45a ₃ using an adhesive, or may be directly covered without using an adhesive. When an adhesive is used _{, it suffices as long as it can bond the roller member 45a 2} and the roller fixing member 45a _3, and for example, a solvent-based adhesive such as an acrylic resin type, a vinyl chloride resin type, a chloroprene rubber type, or a nitrile rubber type. Can be mentioned.

The rotational force transmission mechanism (not shown) includes a grooved pulley 45b _{1 fixed to the output shaft of the drive roller motor 45b, a grooved pulley 45a 112} of the drive roller 45a, and these grooved pulleys 45b ₁ , 45a. It has a grooved belt 45c _{1 stretched between 112} (see FIG. 7).

[Positional relationship of each part in the suction port]
Next, the positional relationship of each component including the drive roller 45a in the suction port body 40 will be described. Hereinafter, as shown in FIG. 5, the drive roller axis of the first axis P ₁ of the 45a, the connection pipe portion 42 of the connecting shaft portion axis and the second axis P ₂ of 42x, the axis of the rotary brush 43 the third axis P _3, illustrating the axial center of the pair of rear rollers 49 fourth axis P _4, the axis of the drive roller motor 45b as the fifth axis P _5.

In the suction port body 40, as shown in FIG. 4, the drive roller 45a is arranged at an intermediate position in the suction port main body 41 in the left-right direction (arrow A direction). Further, as shown in FIG. 5, the first axis P ₁ is arranged between the second axis P ₂ and the suction port 41a ₁ or the third axis P _3. By arranging one drive roller 45a at such a position, it is possible to improve the turning operability of the suction port body 40 while suppressing the load applied to the rotary brush motor 44.

Further, the fourth axis P ₄ is arranged at a position rearward from the second axis P _2. By arranging the pair of left and right rear rollers 49 at such positions, it is effective for the vacuum cleaner 100 to stand on its own in a substantially vertical manner by supporting the drive roller 45a and the pair of left and right rear rollers 49 at three points. (See FIG. 2), and the rear roller 49 can prevent the rear portion of the suction port body 40 from coming into contact with the flooring floor surface F and being damaged.

The shaft portion 45d ₁₁ of the drive roller unit 45 is disposed on substantially the same axis as the fifth axis P5 of the rear of the drive roller motor 45b than the first axis P ₁ of the driving roller 45a, with and The force member is arranged in front of the shaft portion 45d _11. Therefore, the drive roller unit 45 can swing in the vertical direction (arrow C direction) with the shaft portion 45d ₁₁ as a fulcrum, and the load of the vertical movement of the drive roller 45a can be adjusted by the urging member. _{In FIG. 6, a case where two recesses 45d 21} are provided in the drive roller unit 45 so that two coil springs as urging members can be provided has been described, but the number of _{recesses 45d 21 is 3.} In addition, the number of coil springs actually provided may be changed according to the load to be applied to the drive roller 45a.

[Vacuum cleaner operation]
When cleaning the floor surface F using the vacuum cleaner 100 configured in this way, as shown in FIG. 8B, the operation is performed after the connection pipe portion 42 of the suction port body 40 is in an inclined state. Turn on the power switch of unit 10c. At this time, as shown in FIG. 12A, the switch contact portion 42a ₁ provided on the connection shaft portion 42x of the connection pipe portion 42 is located at a position away from the lever 46a of the posture detection switch 46, and the posture detection switch. Reference numeral 46 denotes a state in which the rotary brush motor 44 and the drive roller motor 45b are driven.

By turning on the power switch, the electric blower 11 is driven and the inside of the dust cup unit 20 becomes a negative pressure, and the air on the floor surface F is sucked together with the dust into the suction port body 40 from the suction port _{41a 1 and extends.} It flows into the dust cup unit 20 through the pipe 30 and the vacuum cleaner main body 10. In the dust cup unit 20, the dust is centrifuged and accumulated, and the air from which the dust has been removed passes through the vacuum cleaner main body 10 again and is discharged to the outside from an exhaust port (not shown).

When the power switch is turned on, the rotary brush motor 44 and the drive roller motor 45b are driven, and the rotary brush 43 and the drive roller 45a are rotated. At this time, since the drive roller 45a is pressed toward the floor surface F by the urging member, the suction port main body 41 tries to move forward due to the frictional resistance between the rotating drive roller 45a and the floor surface F. The power to do is added. Therefore, the user can move the suction port 40 forward by simply pressing the handle 10b lightly. Alternatively, the suction port body 40 is in a state of self-propelling and pulling the vacuum cleaner main body 10 through the extension pipe 30. Further, the suction force of the electric blower 11 in the vacuum cleaner main body 10 causes the suction port body 40 sticking to the floor to self-propell by the drive roller 45a, so that it is light and easy to clean by simply touching the handle 10b. And can reduce the burden on the body. Since the drive roller 45a is arranged at the center of the suction port body 40, the small turning property is improved, and cleaning can be smoothly performed even in a narrow place such as around the legs of a table.

When the user twists the handle 10b to the right or left while the suction port 40 is running, the suction port 40 turns to the right or left. The turning in this case includes the movement of the suction port body 40 to the left and right. At this time, since the drive roller 45a is located at an intermediate position in the left-right direction, the connection shaft portion 42x of the connection pipe portion 42 serves as an action point, and the drive roller 45a serves as a fulcrum, and the suction port body 40 smoothly moves to the right or left. Convert.

When the suction port body 40 is lifted from the floor surface F during cleaning, the lift detection switch 47 pushed into the suction port main body 41 protrudes to the outside. In this state, the driving of the rotary brush motor 44 and the drive roller motor 45b is stopped, and the rotation of the rotary brush 43 and the drive roller 45a is stopped.

Further, when the user temporarily leaves the place during cleaning, the vacuum cleaner 100 is made independent as shown in FIGS. 1 and 2. At this time, the connecting pipe portion 42 of the suction port body 40 is in a substantially vertical state in which the connection pipe portion 42 swings upward by a predetermined angle or more as shown in FIG. 8 (B). In this state, as shown in FIG. 12B, the switch contact portion 42a ₁ provided on the connection shaft portion 42x of the connection pipe portion 42 abuts on the lever 46a of the posture detection switch 46 and pushes it down. The posture detection switch 46 switches so as to stop the driving of the rotary brush motor 44 and the drive roller motor 45b.

As a result, the rotating brush 43 and the drive roller 45a are automatically stopped even if the user does not turn off the power of the operation unit 10c, so that the suction port 40 is self-propelled and the self-supporting vacuum cleaner 100 is balanced. It is possible to prevent a problem that the brush is broken and collapsed and damaged.

<Vacuum cleaner operating circuit>
FIG. 13 is a circuit diagram showing an example of an operating circuit of the vacuum cleaner according to this embodiment.
As shown in FIG. 13, the operation circuit of the vacuum cleaner 100 is centered on the circuit board 142 in the vacuum cleaner main body 10, and the dust sensor board 101, the key board 102, the LED board 103, and the rotation in the suction port body 40. It is distributed and mounted on the power brush substrate 104 for the brush 43.
The circuit board 142 is arranged in the vacuum cleaner main body 10. A microcomputer 110 corresponding to the control unit according to the present invention is mounted on the circuit board 142.

In FIG. 13, for convenience of reference, some circuit elements are prefixed with the letters Q for the transistor, R for the resistor, SW for the tact switch, and LED for the light emitting diode, followed by the element-specific number. ing.
The key board 102 and the LED board 103 are arranged in the operation unit 10c. The two tact switches SW104 and SW102 mounted on the key board 102 in FIG. 13 correspond to a start / stop button and a suction force switching button, respectively.
In FIG. 13, a terminal portion 143 electrically connected to the battery 12 is provided at the left end of the circuit board 142. The L1 terminal is a connection terminal that receives the voltage output B + (rated at 20.5V) from the battery 12. The L2 terminal is a ground (GND) connection terminal.

The output voltage B + of the battery 12 supplied from the L1 and L2 terminals is supplied to the electric blower 11 via the transistor Q4 as a switch. The on / off of Q4 is controlled by the "suction drive" signal output by the microcomputer 110. In this embodiment, the electric blower 11 is a DC brushless motor. In this embodiment, the "suction drive" signal for driving the electric blower 11 is a pulsed signal, and the speed of the electric blower 11, that is, the suction force can be changed by changing the on-duty ratio thereof. ..
The output voltage B + from the battery 12 is also supplied to the key board 102. Furthermore, the output voltage is supplied as an input of the regulated power supply circuit 111 that outputs a 5V power supply via the latch circuit 106.

The latch circuit 106 is a circuit for turning on and off a regulated power supply of 5 V. The 5V power supply is a power supply that operates the microcomputer 110, the driver circuit 112, the dust detection circuit 114, the amplifier circuit 113, the LED 501 of the dust sensor board, the Q601 of the phototransistor, and the like. The voltage value of 5V is only an example.
Further, the output voltage B + of the battery 12 is supplied to the power brush substrate 104 in the suction port body 40 to rotate the rotary brush motor 44 and the drive roller motor 45b of the suction port body 40. However, the supply of the voltage B + to the rotary brush motor 44 and the drive roller motor 45b is turned on and off by the transistor Q10 driven by the "PB drive signal" output from the microcomputer 110.

The microcomputer 110 recognizes that the start / stop button (SW104) or the suction force switching button (SW102) is pressed due to the change in the level of the "KEY1" signal. The voltage level of the "KEY1" signal when any button is pressed is determined by the voltage division ratio of the resistors R102, R107 and R52. The level of the "KEY1" signal differs depending on which button is pressed. When determining the level of the "KEY1" signal, the microcomputer 110 refers to the level of the "KEY2" signal connected to the same power source as a reference.

In response to the operations received by the start / stop button (SW104) and the suction force switching button (SW102), the microcomputer 110 controls the operation of each part of the vacuum cleaner 100. For example, the "suction drive" signal output by the microcomputer 110 turns on and off the Q4 of the transistor to start and stop the electric blower 11. Further, the LEDs 201, LED 202, and LED 203 of the LED substrate 103 are turned on and off by each signal of the LEDs 1 to 3.

The current flowing through the power brush substrate 104 flows through the current detection resistor R58, and a voltage proportional to the magnitude of the current is generated across the resistor. The amplifier circuit 113 amplifies the voltage and provides the "PB current detection" signal to the microcomputer 110. The microcomputer 110 monitors the level of the "PB current detection" signal.
When the suction port 40 is lifted from the floor by the user, the lift detection switch 47 (corresponding to SW301 in FIG. 12) provided on the lower surface of the suction port 40 is turned off for the rotary brush motor 44 and the drive roller. The current to the motor 45b is cut off in a circuit. When the attitude detection switch 46 (corresponding to SW302 in FIG. 12) detects an independent attitude, the circuit is switched from the current path to the rotary brush motor 44 and the drive roller motor 45b to the current path to R304. Then, a steady current flows through R58 of the current detection resistor. The resistance value of R304 is set so that a current value different from that of whether the rotary brush motor 44 and the drive roller motor 45b are operating or stopped (that is, the current value is zero) can be obtained.

By monitoring the level of the PB current detection signal, the microcomputer 110 recognizes whether the rotary brush motor 44 and the drive roller motor 45b are operating or stopped, or whether the suction port 40 is in an independent posture or lifted. do.
Table 1 below shows the states of the electric blower 11, the rotary brush motor 44, and the drive roller motor 45b according to the states of the lift detection switch 47 and the attitude detection switch 46, and the level of the "PB current detection" signal. ing.
When the microcomputer 110 determines that the level of the "PB current detection" signal is the steady current flowing through the R304, the microcomputer 110 determines that it is in a self-supporting posture and stops the electric blower 11. When it is determined that the level of the "PB current detection" signal is whether the rotary brush motor 44 and the drive roller motor 45b are operating or stopped (the start / stop button (SW104) is pressed during operation to receive a stop instruction. Operate the electric blower 11 (except for the state).

As shown in Table 1, even when the suction port 40 is lifted from the floor surface, the lift detection switch 47 is turned off, and the rotary brush motor 44 and the drive roller motor 45b are stopped, the microcomputer 110 The electric blower 11 is operated.
For example, consider a case where the user removes the suction port body 40 and uses the brush member 13 as a handy type vacuum cleaner. When the suction port 40 is removed, the signal level of "PB current detection" becomes zero, as in the case where the lift detection switch 47 is turned off. Although the microcomputer 110 does not directly recognize that the suction port 40 has been removed, it can be used as an electric vacuum cleaner because the electric blower 11 is operated even when the current value is zero.

As described above, even if there is no wiring for the microcomputer 110 to recognize the state of the lift detection switch 47 and the posture detection switch 46 or the attachment / detachment state of the suction port body 40, the electric blower 11 is appropriately operated according to the situation. And stop. According to this embodiment, the wiring connecting the vacuum cleaner main body 10 and the suction port body 40 is only two power lines that commonly drive the rotary brush motor 44 and the drive roller motor 45b. The connection mechanism from the vacuum cleaner main body 10 to the suction port 40 via the extension pipe 30 can be made simple because wiring of switches is not required.
That is, the electric blower 11 operates unless the suction port body 40 is attached and the suction port body 40 is not in a self-supporting posture and is in a lifted state (see the fourth row of Table 1). When the suction port body 40 is removed, the rotary brush motor 44 and the drive roller motor 45b are not connected. Therefore, no current flows through the current detection resistor R58 (zero current). The state of zero current is equal to the state of the bottom row in Table 1 (lifted state and collapsed posture). The microcomputer 110 does not recognize that the suction port 40 has been removed, but operates the electric blower 11 based on the level of the "PB current detection" signal being zero current.
As described above, even with a simple configuration of only two power lines, the microcomputer 110 operates or operates the electric blower 11 in response to the lift detection and the posture detection if the suction port 40 is attached. When the suction port body 40 is stopped and the suction port body 40 is removed, the electric blower 11 is operated, so that the suction port body 40 can be used as an electric vacuum cleaner regardless of attachment / detachment.

In this embodiment, the posture detection switch 46 is in a state in which the extension direction of the extension pipe 30 in the front-rear direction of the suction port body 40 forms a predetermined angle (for example, 85 ° ± 5 °) with respect to the horizontal plane of the front floor surface. Then, the current path is switched to the R304 side. The microcomputer 110 recognizes that the level of the "PB current detection" signal is in the range corresponding to the state, and determines that the posture is independent.

Next, the circuit operation when the power is turned off from the power on state will be described. The power off is started when the operating microcomputer 110 outputs a "POW_OFF" signal. For example, the microcomputer 110 outputs a "POW_OFF" signal when there is no operation for a predetermined period after the start / stop button (SW104) is pressed to stop the electric blower 11. Alternatively, the "POW_OFF" signal is output when the posture detection switch 46 has not been operated for a predetermined period after it has been in the self-supporting posture.

When the "POW_OFF" signal is output from the microcomputer 110 in one shot, the latch circuit that turns on the Q1 of the switching transistor is turned off by using it as a trigger. When Q1 is turned off, the battery output voltage B supplied to the IC2 is cut off and is not supplied to the regulated power supply circuit 111. As a result, the 5V power supply is turned off.
Next, the circuit operation in the transition from the power-off state to the power-on state will be described. In the power-off state, the 5V power supply is cut off, and the microcomputer 110 is not operating. However, the output voltage B + from the battery 12 is supplied to the key board 102.

When either the start / stop button (SW104) or the suction force switching button (SW102) is pressed, a latch-on signal is input to the latch circuit 106 via the turned-on switch (SW signal shown in FIG. 13). With this as a trigger, the latch circuit 106 is turned on, and Q1 which has been turned off is turned on. When Q1 is turned on, a voltage is supplied to the regulated power supply circuit 111, and the 5V power supply starts up.
When the 5V power supply is turned on, a 5V voltage is supplied to the VDD terminal which is the power supply of the microcomputer 110, and the C16 connected to the RESET terminal is charged via the R50, and the reset is released soon. In this way, the processing of the microcomputer 110 is started.

When the 5V power supply is turned on, power is supplied to the driver circuit 112, the dust detection circuit 114, the amplifier circuit 113, and the like, and each circuit operates. As a result, the microcomputer 110 can detect the user's operation of the start / stop button (SW104) and the suction force switching button (SW102), and the LEDs 201 to 203 can be turned on and off according to the operation. In addition, the operation of the electric blower 11 can be controlled. Further, by reading the level of the "PB current detection" signal, it is possible to detect whether the rotary brush motor 44 and the drive roller motor 45b are operating or stopped, and whether the suction port 40 is in a self-supporting posture. become.

After the start / stop button (SW104) is pressed to stop the electric blower 11 and a predetermined period (for example, 3 minutes) elapses without any operation, the microcomputer 110 outputs a "POW_OFF" signal. Turn off the 5V power supply. Further, even if the above period elapses without any operation after the suction port body 40 is in the self-supporting posture in the power-on state, the “POW_OFF” signal is output to turn off the 5V power supply. This reduces the power consumed by the battery 12 to operate the microcomputer 110 and other circuits during standby.
The latch circuit 106 and the regulated power supply circuit 111 constitute a power supply unit according to the present invention.

[Other configurations]
14 is a left cross-sectional view showing the suction port body of the vacuum cleaner of FIG. 1, in which FIG. 14A shows a state of non-contact with the bumper wall, and FIG. 14B shows a state of contact with the bumper wall. Shown.
As shown in FIGS. 7 and 14A, in the lower case 41a of the suction port main body 40, the first space 41s ₁ for accommodating the rotating brush 43 and the second space 41s ₂ behind the first space 41s ₁ A rib 41a _{3 serving as} a partition is provided between the two.

In the suction port body 40, since _{the upper end of the rib 41a 3} is joined to the front case 41c via the upper case 41b, the upper part of the first space 41s _{1 and} the upper part of the second space 41s ₂ are closed. .. On the other hand, _{the lower end portion of the rib 41a 3} is arranged so as to face the rear end portion of the suction port 41a _1. Due to this structure, the intake flow path 41A _{4 that communicates the suction port 41a 1} and the second space 41s ₂ is narrowed by the rib 41a _3. As a result, the airflow flowing from the suction port 41a to _{the connecting pipe portion 42 through the intake flow path 41A 4} and the second space 41s ₂ can be increased in pressure to increase the suction force, and dust can be strongly sucked.

As shown in FIG. 3, the bumper 41d has an uneven portion 41d ₁ formed on its surface (front surface) to imitate a part of ripples. Since the convex portion and the concave portion in the concave-convex portion 41d ₁ are formed in a curved shape in which the middle portion in the left-right direction is low and the left and right end portions are high, dust adhering to the concave portion is likely to collect in the middle left and right. .. In addition, the uneven shape reduces the area in contact with the wall by about half as compared with the flat shape, so that the scratched area is reduced and the appearance is improved.

The bumper 41d is made of a soft material such as low density polyethylene (LDPE). Therefore, as shown in FIG. 14B, by pressing the bumper 41d against the wall W, the bumper 41d is elastically deformed _{and the distance between the wall W and the suction port 41a 1} is shortened, and as a result, the suction force can be increased. can.

(Embodiment 2)
15A and 15B are views showing a drive roller in a suction port of the vacuum cleaner according to the second embodiment, FIG. 15A is a perspective view, FIG. 15B is a front view, and FIG. 15C is a line II of FIG. 15B. A cross-sectional view taken along the arrow, FIG. 15 (D) is a cross-sectional view taken along the line II-II of FIG. 15 (C).
The suction port body of the vacuum cleaner of the second embodiment is the same as the suction port body of the first embodiment except that the configuration of the drive roller 45a in the first embodiment is different. Hereinafter, the parts different from the first embodiment in the second embodiment will be mainly described.

The drive roller 145a of the second embodiment is _{a rotary member 145a 1 connected to a grooved belt 45c 1} (see FIG. 7) of the rotational force transmission mechanism portion, and a cylindrical roller member fitted in the outer peripheral portion of the rotary member 145a _1. It has 45a ₂ and does not have a component corresponding to the _{roller fixing member 45a 3} in the drive roller 45a described in the first embodiment (FIGS. 9 to 11).

The rotating member 45a _{1 includes a pair of large-diameter flange portions 145a 111} provided on the outer peripheral surface at predetermined intervals in the axial direction and a pair of small-diameter flange portions 145a ₁₁₃ provided on both sides of the pair of large-diameter flange portions 145a _111. It has a main body portion 145a ₁₁ and a support block 145a ₁₃ rotatably attached to both ends of the main body portion 145a _{11 in} the axial direction via pins and bearings 145a ₁₂ .

_{A grooved pulley 145a 112} forming a rotational force transmission mechanism is integrally formed between the small-diameter flange portion 145a ₁₁₃ on one end side of the main body portion 145a ₁₁ and the support block 145a _13. Further, as shown in FIG. 15D, a rib having a cross-shaped cross section is formed between the grooved pulley 145a ₁₁₂ and the small diameter flange portion 145a ₁₁₃ and between the support block 145a ₁₃ and the small diameter flange portion 145a _113. 145a ₁₁₄ is provided. The shape of the ribs does not have to be limited to a cross shape, and the number of ribs may be increased to, for example, six.

When the drive roller 145a is rotating, an air flow is generated by the rotating _{ribs 145a 114} , and when fibrous dust such as hair or lint is about to wind around the _{rotating member 45a 1, the fibrous dust is swept by the air flow and winds around.} Is suppressed. _{Also in the rotating member 45a 1} of the drive roller 45a of the first embodiment described with reference to FIGS. 9 to 11, between the grooved pulley 45a ₁₁₂ and the outer flange portion 45a _111, and between the support block 45a ₁₃ and the outer flange portion 45a ₁₁₁ . A rib having a cross-shaped cross section may be provided between the ribs.

The elastic rubber cylindrical roller member 145a ₂ has its hole expanded in diameter and is fitted between a pair of large-diameter flange portions 145a _{111 in the rotating member 45a 1.} Since the fitted roller member 145a ₂ comes into close contact with the rotating member 145a ₁ by contracting, adhesion by an adhesive is omitted.

The thickness of the roller member 145a ₂ is thick at both ends in the axial direction on the outer peripheral surface and slightly thinner between both ends. Due to this difference in thickness, the outer peripheral surface of the _{roller member 145a 2 has a concave groove 145a 21.} Is formed. By the roller member 145a ₂ provide a concave peripheral groove 145a _21, the contact area between the floor surface of the roller member 145a ₂ is reduced as compared with the case where there is no concave peripheral groove 145a _21, as a result, the rotation member 145a ₁ and The occurrence of vibration, rattling or wobbling of the roller member 145a _{2 can be suppressed, and noise can be reduced.}

(Embodiment 3)
In the vacuum cleaner of the first embodiment, a case where the suction port body 40 is configured to hold the lifted state by the lift detection switch 47 and turn off the power is illustrated, but the vacuum cleaner is configured as follows. May be good. That is, the lift detection switch 47 is omitted, a switch or a sensor is provided between the suction port main body 41 and the drive roller unit 45, and the power is turned off when the drive roller unit 45 is detected to be separated from the suction port main body 41. It may be configured as follows. In this way, the drive roller unit 45 can also function as a lift detection switch.

Further, the drive roller unit 45 may be configured so that the entire drive roller unit 45 moves up and down to adjust the load, instead of swinging by the _{shaft portion 45d 11.} Further, in this case as well, the drive roller unit 45 may also function as a lift detection switch.

(Embodiment 4)
In the case of the drive roller 45a described with reference to FIGS. 9 to 11, the roller member 45a ₂ is more likely to slip when traveling on a carpet than when traveling on flooring or tatami mats, and the traveling force of the suction port body 40 Is likely to decrease.
Therefore, in the drive roller 45a, the groove 45ax between the annular convex portion 45a _{32 of the roller fixing member 45a 3} and the outer flange portion 45a ₁₁₁ of the rotating member 45a ₁ , that is, circles on both sides in the axial direction of _{the roller member 45a 2.} An annular bristles roller 45ax ₁ (two-dot chain line portion in FIG. 10) may be provided. In this case, for example, _{the material of the hair roller 45ax 1} is attached to the groove 45ax with an adhesive and fixed. In this way, when cleaning _{the carpet, a large frictional resistance with the carpet of the hair roller 45ax 1} is added, so that the traveling force of the suction port 40 can be increased.
Alternatively, the outer peripheral surface of the roller member 45a ₂ may be formed in an uneven shape, and the unevenness may increase the frictional resistance with the carpet to increase the running force of the suction port body 40, and further, the hair roller 45ax _{1 may be formed.} May be used together.

(Embodiment 5)
In the first embodiment, the case where the rotary brush 43 and the rotary brush motor 44 for rotating the rotary brush 43 are provided in the suction port body 40 is illustrated, but the rotary brush motor 44 is omitted and a rotary brush that is rotated by the suction airflow is adopted. Alternatively, the rotating brush may be omitted.

(Embodiment 6)
In the first embodiment, the drive roller unit 45 in which the drive roller 45a, the drive roller motor 45b, and the rotational force transmission mechanism portion are housed in the casing 45d is swingably attached to the suction port main body 41 around the _{shaft portion 45d 11.} Although the configuration in which the drive roller unit 45 is urged to the floor surface F side by the mounting and urging member is illustrated, the drive roller 45a, the drive roller motor 45b, and the rotational force transmission mechanism portion are housed in the suction port main body 41. You may. In this case, for example, a support member having a suspension function is provided in the suction port main body, and both ends of the drive roller are rotatably attached to the support member. At this time, the lower part of the roller member of the drive roller is exposed to the outside through a hole provided in the bottom of the suction port main body. Then, a grooved belt is stretched between the grooved pulley of the drive roller and the grooved pulley of the drive roller motor.

(summary)
The suction port body of the vacuum cleaner of the present invention is configured as follows (I) to (III).
(I) The suction port body of the electric vacuum cleaner of the present invention has a suction port main body having a bottom surface provided with a suction port extending in the left-right direction, and can swing around the axis in the left-right direction at the rear portion of the suction port main body. A connecting pipe portion provided in the suction port body, a rotary brush rotatably provided around the axis in the left-right direction at the suction port in the suction port main body, a rotary brush motor for rotationally driving the rotary brush, and the rotation. Equipped with an attitude detection switch that switches between driving and stopping the brush motor
The posture detection switch is configured to switch the rotary brush motor from driving to stopping when the connecting pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface.

(II) The suction port body of the motor of the present invention has a suction port main body having a bottom surface provided with a suction port extending in the left-right direction, and can swing around the axis in the left-right direction at the rear portion of the suction port main body. The connection pipe portion provided in the above, the drive roller rotatably provided on the bottom surface side of the suction port main body, the drive roller motor for rotationally driving the drive roller, and the drive and stop of the drive roller motor. Equipped with an attitude detection switch to switch
The posture detection switch is configured to switch the drive roller motor from driving to stopping when the connecting pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface.

(III) The suction port body of the motor of the present invention has a suction port main body having a bottom surface provided with a suction port extending in the left-right direction, and can swing around the axis in the left-right direction at the rear portion of the suction port main body. A connection pipe portion connected to the suction port body, a rotary brush rotatably provided at the suction port in the suction port main body around the axis in the left-right direction, a rotary brush motor for rotationally driving the rotary brush, and the suction port. A drive roller rotatably provided on the bottom surface side of the mouth body, a drive roller motor for rotationally driving the drive roller, and an attitude detection switch for switching between driving and stopping of the rotary brush motor and the drive roller motor. With
The posture detection switch is configured to switch the rotary brush motor and the drive roller motor from drive to stop when the connection pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface. ..

In the suction port bodies of the vacuum cleaners (I) to (III), the suction port main body has a receiving portion for connecting to the connecting pipe portion.
The connecting pipe portion has a connecting shaft portion that swingably connects to the receiving portion of the suction port main body around the axis in the left-right direction.
The posture detection switch is provided on the receiving portion and is provided.
The connection shaft portion may have a switch contact portion that abuts on the posture detection switch by swinging and switches the motor from driving to stopping.
In this way, the switch can be reliably switched with a simple configuration without using a component such as a sensor.

It should be noted that the disclosed embodiments are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

40 Suction port body 41 Suction port body 41a ₁ Suction port 41e Receiving part 42 Connection pipe part 42a ₁ Switch contact part 42x Connection shaft part 43 Rotating brush 44 Rotating brush motor 45a Drive roller 45b Drive roller motor 46 Attitude detection switch 100 Electric vacuum cleaner

Claims (4)

A suction port main body having a bottom surface provided with a suction port extending in the left-right direction, a connection pipe portion provided at the rear portion of the suction port main body so as to be swingable around an axial center in the left-right direction, and the suction port main body. The suction port is provided with a rotary brush rotatably provided around the axis in the left-right direction, a rotary brush motor for rotationally driving the rotary brush, and an attitude detection switch for switching between driving and stopping of the rotary brush motor. ,
The posture detection switch is configured to switch the rotary brush motor from driving to stopping when the connecting pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface .
The suction port main body has a receiving portion that connects to the connecting pipe portion, and has a receiving portion.
The receiving portion is a component that can rotate around the axial center in the front-rear direction and swingably holds the connecting pipe portion around the axial center in the left-right direction.
The connecting pipe portion has a connecting shaft portion that swingably connects to the receiving portion of the suction port main body around the axis in the left-right direction.
The posture detection switch is provided on the receiving portion and is provided.
The connecting shaft portion has a switch contact portion that abuts on the attitude detection switch.
The switch contact portion is a suction port body of a vacuum cleaner, characterized in that the drive and stop of the motor are switched by swinging the connection shaft portion. A suction port body having a bottom surface provided with a suction port extending in the left-right direction, a connection pipe portion provided at the rear portion of the suction port body so as to be swingable around an axial center in the left-right direction, and a bottom surface of the suction port body. It is provided with a drive roller rotatably provided on the side, a drive roller motor for rotationally driving the drive roller, and an attitude detection switch for switching between driving and stopping of the drive roller motor.
The posture detection switch is configured to switch the drive roller motor from drive to stop when the connection pipe portion is lifted to a predetermined angle with respect to the suction port main body on the floor surface .
The suction port main body has a receiving portion that connects to the connecting pipe portion, and has a receiving portion.
The receiving portion is a component that can rotate around the axial center in the front-rear direction and swingably holds the connecting pipe portion around the axial center in the left-right direction.
The connecting pipe portion has a connecting shaft portion that swingably connects to the receiving portion of the suction port main body around the axis in the left-right direction.
The posture detection switch is provided on the receiving portion and is provided.
The connecting shaft portion has a switch contact portion that abuts on the attitude detection switch.
The switch contact portion is a suction port body of a vacuum cleaner, characterized in that the drive and stop of the motor are switched by swinging the connection shaft portion. A suction port main body having a bottom surface provided with a suction port extending in the left-right direction, a connection pipe portion oscillatingly connected to the rear portion of the suction port main body around an axial center in the left-right direction, and the suction port main body. A rotary brush rotatably provided around the axis in the left-right direction at the suction port, a rotary brush motor for rotationally driving the rotary brush, and a drive roller rotatably provided on the bottom surface side of the suction port body. A drive roller motor that rotationally drives the drive roller, and an attitude detection switch that switches between driving and stopping the rotary brush motor and the drive roller motor.
The attitude detection switch is the connecting pipe portion to said suction port body on the floor surface is configured to switch to stop the lifting and driving the motor for rotating the brush and the drive roller motor to a predetermined angle ,
The suction port main body has a receiving portion that connects to the connecting pipe portion, and has a receiving portion.
The receiving portion is a component that can rotate around the axial center in the front-rear direction and swingably holds the connecting pipe portion around the axial center in the left-right direction.
The connecting pipe portion has a connecting shaft portion that swingably connects to the receiving portion of the suction port main body around the axis in the left-right direction.
The posture detection switch is provided on the receiving portion and is provided.
The connecting shaft portion has a switch contact portion that abuts on the attitude detection switch.
The switch contact portion is a suction port body of a vacuum cleaner, characterized in that the connection shaft portion swings to switch between driving and stopping the rotary brush motor and the drive roller motor. An electric vacuum cleaner provided with the suction port body according to any one of claims 1 to 3.

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