WO2017183250A1 - Suction inlet assembly for electric vacuum cleaner - Google Patents

Abstract

Provided is a suction inlet assembly for an electric vacuum cleaner with which a rotation brush motor and/or a drive roller motor can be automatically stopped when a connection pipe is pivoted to a predetermined angle. Disclosed is a suction inlet assembly for an electric vacuum cleaner, the suction inlet assembly comprising: a suction inlet body having a bottom surface in which a suction inlet extending in the left/right direction is provided; a connection pipe part provided to a rear part of the suction inlet body so as to be pivotable about an axial center which is in the left/right direction; a rotation brush provided to the suction inlet in the suction inlet body so as to be rotatable about an axial center which is in the left/right direction; a rotation brush motor that drives and rotates the rotation brush; and a posture detection switch that switches the rotation brush motor between drive and stop. The suction inlet assembly is characterized in that the posture detection switch is configured so as to switch the rotation brush motor from drive to stop when the connection pipe part is lifted to a predetermined angle with respect to the suction inlet body on a floor surface.

Description

Vacuum cleaner suction port

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

As a conventional vacuum cleaner, in Patent Document 1, a suction port body having a bottom surface provided with a suction port extending in the left-right direction and a rear portion of the suction port body are provided so as to be swingable about a horizontal axis. A canister having a suction port body having a connecting pipe portion, a rotary brush provided in the suction port of the suction port body so as to be rotatable about a lateral axis, and a rotary brush motor for rotating the rotary brush. A type of vacuum cleaner has been proposed.

Patent Document 2 proposes a stick-type vacuum cleaner provided with a suction port body having a configuration similar to that of Patent Document 1.
Such a vacuum cleaner can reduce the force when the user advances the suction port body forward while scraping the dust on the floor surface into the suction port by rotating the rotating brush.

JP 2014-33934 A JP2015-144785A

When a user who uses a stick-type vacuum cleaner such as that disclosed in Patent Document 2 temporarily leaves the site, usually the electric power of the vacuum cleaner is turned off to drive the electric blower and rotary brush in the main body of the vacuum cleaner. The motor is stopped, and the wall or furniture in the room is leaned against a vacuum cleaner, or the vacuum cleaner is placed on the floor sideways.

On the other hand, there is a user's request to make the vacuum cleaner self-supporting by swinging the connection pipe part of the suction port body to about 90 ° with respect to the floor surface instead of the above-mentioned way of placing. There is a problem. In other words, if the vacuum cleaner is made to stand on its own while the rotating brush is rotating, the suction port moves forward and falls, and the cleaner body falls on the floor and breaks. The motor must be stopped securely. However, since the stop of the rotary brush motor depends on the user's power-off operation, a situation is assumed in which the electric vacuum cleaner is made to stand on its own without performing this operation.

In addition, a suction port body that has improved driving performance by providing a driving roller has also been proposed. In this case, the driving roller motor must be stopped before the vacuum cleaner is self-supported. Since the stop of the roller motor also depends on the user's power-off operation, a situation is assumed in which the vacuum cleaner is made to stand on its own without performing this operation.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and the suction port of a vacuum cleaner that can automatically stop the rotary brush motor and / or the drive roller motor when the connecting pipe swings to a predetermined angle. The purpose is to provide a body.

According to the present invention, the following (I) to (III) vacuum cleaner suction ports 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 connection pipe provided at the rear portion of the suction port main body so as to be swingable about a horizontal axis. A rotary brush provided to the suction port of the suction port body so as to be rotatable about a left-right axis, a rotary brush motor that rotationally drives the rotary brush, and driving of the rotary brush motor; An attitude detection switch for switching the stop,
The posture detection switch is configured to switch the rotary brush motor from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port 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 connection pipe provided at the rear portion of the suction port main body so as to be swingable about a horizontal axis. 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 a posture detection switch that switches between driving and stopping of the drive roller motor. Prepared,
The posture detection switch is configured to switch the drive roller motor from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface. Is provided.

(III) According to the present invention, a suction port body having a bottom surface provided with a suction port extending in the left-right direction, and a connection pipe connected to the rear portion of the suction port body so as to be swingable about a horizontal axis. A rotary brush provided to the suction port of the suction port body so as to be rotatable about a lateral axis, a rotary brush motor for rotating the rotary brush, and a bottom surface side of the suction port body. A drive roller provided rotatably, a drive roller motor that rotationally drives the drive roller, and a posture detection switch that switches between driving and stopping of the rotary brush motor and the drive roller motor,
The posture detection switch is configured to switch the motor for rotating brush and the motor for driving roller from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface. A vacuum inlet is provided.

When the connecting pipe portion of the suction port body swings up to a predetermined angle with respect to the suction port body and becomes vertical, the state is detected by the posture detection switch. Accordingly, the suction port body provided with the rotary brush and the motor for the rotary brush, the suction port body provided with the drive roller and the motor for the drive roller, or the motor for the rotary brush and the rotary brush and the motor for the drive roller and the drive roller were provided. In the suction port body, when the connecting pipe portion is in the vertical state, the driving of the rotating brush motor and / or the driving roller motor can be automatically stopped. Therefore, since the rotating brush and / or the driving roller can be automatically stopped when the stick-type vacuum cleaner in operation is self-supporting, the suction port body is self-propelled and the self-supporting vacuum cleaner is balanced. It is possible to prevent problems such as collapse and fall.

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 sectional view of the self-supporting state of the vacuum cleaner of FIG. It is a perspective view which shows the suction inlet body of the vacuum cleaner of FIG. It is a bottom view which shows the suction inlet body of the vacuum cleaner of FIG. It is left side sectional drawing which shows the suction inlet of the vacuum cleaner of FIG. It is a perspective view which shows the drive roller unit in the suction inlet of the vacuum cleaner of FIG. It is an exploded view of the suction inlet body of the vacuum cleaner of FIG. It is explanatory drawing which shows the rocking | fluctuation state of the connection pipe part in the suction inlet body of the vacuum cleaner of FIG. 1, Comprising: (A) is the lowest fall state, (B) is the highest rise state. It is a perspective view which shows the drive roller in the drive roller unit of FIG. FIG. 10 is a front view of the drive roller of FIG. 9. FIG. 10 is a front sectional view of the drive roller of FIG. 9. (A) is the elements on larger scale of FIG. 11 (A), (B) is the elements on larger scale 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 side sectional view showing the suction mouth of the vacuum cleaner of FIG. 1, (A) shows a non-contact state to the wall of the bumper, (B) shows a contact state to the wall of the bumper. . It is a figure which shows the drive roller in the suction inlet of the vacuum cleaner which concerns on Embodiment 2, Comprising: (A) is a perspective view, (B) is a front view, (C) is the II arrow directional cross section of FIG. 15 (B). FIG. 4D is a cross-sectional view taken along the line II-II in FIG.

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

<Overall configuration of vacuum cleaner>
The electric vacuum cleaner 100 includes an electric blower 11, a battery 12, a circuit board and the like, a vacuum cleaner main body 10, 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. 1 and 2 is provided with an extension pipe 30 that is detachably connected to the cylindrical air intake portion 10a, and a suction port body 40 that is detachably connected to the extension pipe 30. Has been. In the present specification, the direction in which the suction port 40 advances and retreats on the floor surface F is “front-rear direction”, the direction perpendicular to the floor surface F is “up-down direction”, and is parallel to the floor surface F and front-rear direction. The direction perpendicular to the left and right direction is defined as “left and right direction”, and the suction port body 40 is defined as right and left when viewed from the rear.

The vacuum cleaner body 10 has a handle 10b and an operation unit 10c provided on the handle 10b. The operation / stop is switched by operating a start / stop button SW104 provided on the operation unit 10c. The suction force can be switched between strong and weak by operating the provided suction force switching button SW102. During operation, the electric blower 11 is driven, and a rotary brush motor and a drive roller motor, which will be described later, of the suction port body 40 are driven. Although not shown, the cleaner body 10, the extension pipe 30, and the suction port body 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. In addition, the brush member 13 is provided in the suction part 10a of the cleaner main body 10 so that folding is possible.

<Configuration of suction port>
3 is a perspective view showing a 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 view of the vacuum cleaner of FIG. It is left sectional drawing which shows a suction inlet. 6 is a perspective view showing a driving 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. Moreover, FIG. 8 is explanatory drawing which shows the rocking | fluctuation state of the connection pipe part in the suction inlet body of the vacuum cleaner of FIG. 1, Comprising: (A) is the lowest state, (B) is the highest state.

[About suction port]
The suction port body 40 is swingable about a left-right axis center at a suction port body 41 having a bottom surface provided with a suction port 41a ₁ extending in the left-right direction (arrow A direction) and a rear portion of the suction port body 41. A connected connection pipe portion 42; a rotary brush 43 provided at the suction port 41a ₁ of the suction port main body 41 so as to be rotatable about a left-right axis; and a rotary brush motor 44 for driving the rotary brush 43 to rotate. , A drive roller unit 45 provided on the bottom surface side of the suction inlet body 41, a posture detection switch 46, and a lifting detection switch 47.

Suction port body 40 is provided with a lower case 41a having a suction port 41a _1, and an upper case 41b, the front case 41c, a bumper 41d, and cylindrical receiving portions 41e, and a rear case 41f.

The lower case 41a includes a first space 41s ₁ having an upper opening shape that rotatably stores the rotary brush 43 above the suction port 41a _1, a lifting detection switch 47 disposed behind the first space 41s ₁ , and a 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 a third space 41s ₃ of lower opening shaped (see FIG. 14) third and a space 41s ₃ of the fourth space 41s of the sector arranged lower opening shaped rearwardly _4, the second space 41s ₂ is A hole 41a ₂ is formed to expose a part of the lifting detection switch 47 to the outside downward.

The upper case 41b is a part covering the second space 41s ₂ and the third space 41s ₃ of the lower case 41a, the rear end portion thereof, in the twisting direction of the connecting pipe portion 42 is swung to a substantially vertical state times A restriction piece 41b ₁ for restricting movement is provided.

Front case 41c is a part covering the first space 41s ₁ of the lower case 41a, and a part for attaching the bumper 41d.
In FIG. 7, reference numeral 41 cx denotes a stopper piece that is detachably attached between the left and right rear end portions of the front case and the left and right front end portions of the upper case 41 b, and the lower case is obtained by removing each stopper piece 41 cx. The upper case 41b and the front case 41c can be detached from 41a.

The lifting detection switch 47 includes a swing lever portion having a wheel, a switch body that supports the swing lever portion so as to be swingable, and a torsion coil spring that biases the swing lever portion downward, and includes a lower case. 41a switch body is connected to the housing circuit boards 48, the wheels of the swing lever portion is biased to expose the holes 41a ₂ to the outside downward. The lifting detection switch 47 switches the motor to drive when the suction port body 40 is on the floor surface F, and stops driving the motor when the suction port body 40 is lifted from the floor surface F. The “motor” referred to here includes the rotating brush motor 44 and a driving roller motor 45b described later provided in the driving roller unit 45.

The rotating brush 43 has a grooved pulley on one end thereof, and a grooved pulley is fixed to the output shaft of the rotating 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.

Rear case 41f includes a circular arc shape portion of the third peripheral portion and the fitting space 41s ₃ of the lower case 41a so as to surround over the right and left from the rear of the drive roller unit 45, the circular arc shape portion and continuously arranged And 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 attached to the bottom surface (lower surface) of the fan-shaped portion so as to be rotatable about the left and right axis. A mounting opening in the form of a downward opening is provided.

Between the left and right mounting recess in the rear case 41f with the circular hole is formed, the cylindrical member 41g is rear case 41f having a convex curved surface portion 41g ₁ on the lower end so as to protrude from the circular hole to the outside downward It is provided above.
Half this third lateral position of the space 41s ₃ of the rear casing 41f of the circular arc shape of the left and right positions and lower cases 41a is for supporting the right and left shaft portions 45d ₁₁ described later of the driving roller unit 45 rotatably A circular rib 41h is provided.

The receiving portion 41e is a component that holds the connection pipe portion 42 so as to be swingable about the axis in the left-right direction, and includes a lower member 41e ₁ and an upper member 41e ₂ that can be divided into two parts.
The lower member 41e ₁ has a circular vent hole portion 41e ₁₁ at the front end and an attachment portion 41e ₁₂ for attaching the posture detection switch 46 to the left end portion of the semi-cylindrical portion.

The upper member 41e ₂ is formed with a notch 41e ₂₁ at the rear end so that the connection pipe portion 42 can swing to a substantially vertical state.
Circular outer periphery of the lower member 41e ₁ and the upper member 41e ₂ and vents receiving portion 41e of the assembled unit 41e ₁₁ is fitted into the semi-circular rib 41e ₁₃ respectively provided on the lower case 41a and upper case 41b It is attached so as to be rotatable around the axial center in the front-rear direction.

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

In the connection shaft portion 42x, the surface on the swinging direction side (arrow B direction side) of the connection pipe portion 42, 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 are convex curved surfaces. It is connected to the receiving portion 41e of the suction port body 41 so as to be swingable around the axis in the left-right direction (in the direction of arrow B) (see FIG. 2).

Lower cover portion 42a has a protruding switch contact portion 42a ₁ on the left side surface of the proximal end portion. The switch abutting portion 42a ₁ abuts on the lever 46a of the attitude 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 rotating brush motor 44 and a driving roller motor 45b described later provided in the driving roller unit 45.

The upper cover portion 42b has an inclined surface adjacent to the convex curved surface and a constricted portion 42b ₁ between the inclined surface and the convex curved surface, and the connection pipe portion 42 is in an inclined state (FIG. 8A). )) To the vertical state (FIG. 8B), the constricted part 42b ₁ is stopped against the inner part of the notch 41e ₂₁ of the receiving part 41e, and further swinging is restricted. The “vertical state” of the connection pipe portion 42 means a state that is substantially perpendicular to the floor surface F.

[About the drive roller unit]
9 is a perspective view showing a 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 sectional view of the drive roller of FIG.

Drive roller unit 45 includes a drive roller 45a, the drive roller motor 45b, the rotational force transmission mechanism having a grooved belt 45 c ₁ and will have a casing 45d for accommodating them, and the suction port body 40 driving roller unit 45 Is attached to the suction inlet main body 41 so as to be urged toward the floor surface F by an urging member (not shown) provided therebetween.

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 a shaft portion 45d ₁₁ on the left and right side surfaces.
The second casing 45d ₂ has a short cylindrical recess 45d ₂₁ into which the lower end portion of the coil spring as the biasing member is fitted at the left and right positions on the upper surface.
The third casing 45d ₃ has an opening 45d ₃₁ for projecting the driving roller 45a to the floor surface F side.

Drive roller motor 45b is accommodated in the space between the first casing 45d ₁ and second casing 45d _2, the driving roller 45a is in the horizontal direction in the space between the first casing 45d ₁ and the third casing 45d ₃ It is stored so that it can rotate around its 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 And a roller fixing member 45a ₃ provided between the two.

The cylindrical roller fixing member 45a ₃ includes inner flange portions 45a ₃₁ provided at both end portions 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 has a halved body 45a _{33 that} can be divided into two.
The cylindrical roller member 45a ₂ is fitted between the pair of annular convex portions 45a ₃₂ of the roller fixing member 45a ₃ .

The rotating member 45a ₁ includes 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 axial ends of the main body 45a ₁₁ . _And a support block 45a ₁₃ which is rotatably mounted via ₁₂ .

Between the one end side of the outer flange 45a ₁₁₁ and support blocks 45a ₁₃ of the main body portion 45a _11, grooved pulleys 45a ₁₁₂ constituting the rotational force transmission mechanism are integrally molded. Further, the inner flange portions 45a ₃₁ of the pair of halves 45a ₃₃ fitted between the pair of outer flange portions 45a ₁₁₁ are fitted inside the pair of outer flange portions 45a _{111 at} the outer peripheral portion of the main body portion 45a _11. A recessed circumferential groove 45a ₁₁₃ is formed. In addition, one or more cuts are formed in a part of the inner flange portion 45a ₃₁ of the half body 45a ₃₃ , and one or more protrusions are provided in a part of the concave circumferential 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 rotate integrally.

Examples of the material of the rotating member 45a ₁ include resins such as POM (polyacetal), PET (polyethylene terephthalate), and PTFE (tetrafluoroethylene). In this embodiment, POM is used.
The material of the roller fixing member 45a ₃ is a resin having a 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 the like, and ABS is used in this embodiment.

Examples of the material of the roller member 45a ₂ include rubbers such as silicone rubber, fluorine rubber, and chlorosulfonated polyethylene rubber. In the present embodiment, silicone rubber is used.
The roller member 45a ₂ may be bonded to the roller fixing member 45a ₃ using an adhesive, or may be directly covered without using an adhesive. In the case of using an adhesive, any adhesive may be used as long as it can bond the roller member 45a ₂ and the roller fixing member 45a ₃ , for example, an acrylic resin, vinyl chloride resin, chloroprene rubber, nitrile rubber, or the like. Is 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 and 45a. _And 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 axis of the drive roller 45 a is the first axis P ₁ , the axis of the connection shaft part 42 x of the connection pipe part 42 is the second axis P ₂ , and the axis of the rotary brush 43 is the axis. The third axis P ₃ , the axis of the pair of rear rollers 49 as the fourth axis P ₄ , and the axis of the drive roller motor 45 b as the fifth axis P _{5 will} be described.

In the suction port body 40, as shown in FIG. 4, the drive roller 45 a is disposed at an intermediate position in the left-right direction (arrow A direction) in the suction port body 41. Further, as shown in FIG. 5, the first axis P ₁ is disposed between the second axis P ₂ and the suction port 41a ₁ or the third axis P ₃ . By disposing 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 disposed at a rear position with respect to the second axis P ₂ . By arranging the pair of left and right rear rollers 49 in such a position, it is effective to make the vacuum cleaner 100 stand up substantially vertically by supporting the driving roller 45a and the pair of left and right rear rollers 49 at three points. (Refer to FIG. 2) Further, the rear roller 49 can suppress the rear portion of the suction port body 40 from coming into contact with the flooring floor 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 energizing member is disposed forwardly of the shaft portion 45d _11. Therefore, it is possible to drive roller unit 45 to the shaft portion 45d ₁₁ as a fulcrum becomes swingable in a vertical direction (arrow C), the load adjustment of the vertical movement of the drive roller 45a by the biasing member. In FIG. 6, so that the coil spring as a biasing member may be provided two, but the driving roller unit 45 are two recesses 45d ₂₁ has described the case provided, the number of recesses 45d ₂₁ 3 Further, the number of coil springs actually provided may be changed according to the load to be applied to the drive roller 45a.

[Operation of vacuum cleaner]
When cleaning the floor 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. The power switch of the unit 10c is turned on. At this time, as shown in FIG. 12A, the switch contact portion 42a ₁ provided in the connection shaft portion 42x of the connection pipe portion 42 is located away from the lever 46a of the posture detection switch 46, and the posture detection switch 46 is switched to a state in which the rotating brush motor 44 and the driving 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 negative pressure, and the air on the floor surface F is sucked into the suction port body 40 from the suction port 41a ₁ together with the dust, and extended. It flows into the dust cup unit 20 through the pipe 30 and the cleaner body 10. In the dust cup unit 20, the dust is centrifuged and collected, and the air from which the dust has been removed passes through the cleaner body 10 and is discharged outside through an exhaust port (not shown).

When the power switch is turned on, the rotating brush motor 44 and the driving roller motor 45b are driven, and the rotating brush 43 and the driving roller 45a are rotated. At this time, since the driving roller 45a is pressed toward the floor surface F by the biasing member, the suction roller body 41 tends to move forward due to frictional resistance between the rotating driving roller 45a and the floor surface F. The power to do is added. Therefore, the user can advance the suction port body 40 only by lightly pressing the handle 10b. Alternatively, the suction port body 40 is self-propelled and pulls the cleaner body 10 through the extension pipe 30. Further, the suction port body 40 that sticks to the floor is driven by the driving roller 45a by the suction force of the electric blower 11 in the cleaner body 10, so that it is light and easy to clean by simply putting a hand on the handle 10b. Can reduce the burden on the body. And since the drive roller 45a is arrange | positioned in the center part of the suction inlet body 40, small turning property increases and it can clean smoothly also in narrow places, such as the leg circumference of a table.

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

During cleaning, when the suction port body 40 is lifted from the floor F, the lifting detection switch 47 that has been pushed into the suction port body 41 protrudes to the outside. In this state, the driving of the rotating brush motor 44 and the driving roller motor 45b is stopped, and the rotation of the rotating brush 43 and the driving roller 45a is stopped.

Moreover, when a user leaves the place temporarily during cleaning, the vacuum cleaner 100 is made independent as shown in FIGS. At this time, the connection pipe portion 42 of the suction port body 40 is in a substantially vertical state in which it swings upward by a predetermined angle or more as shown in FIG. 8B. In this state, as shown in FIG. 12B, the switch abutting portion 42a ₁ provided on the connecting shaft portion 42x of the connecting pipe portion 42 abuts on the lever 46a of the attitude detection switch 46 and is pushed down. The attitude detection switch 46 is switched 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 driving roller 45a are automatically stopped even if the user does not turn off the power to the operation unit 10c, so that the suction port body 40 is self-propelled and the self-standing vacuum cleaner 100 is balanced. It is possible to prevent the problem of breaking and falling and breaking.

<Operation circuit of vacuum cleaner>
FIG. 13 is a circuit diagram showing an example of an operation circuit of the electric vacuum cleaner according to this embodiment.
As shown in FIG. 13, the operation circuit of the vacuum cleaner 100 rotates around the dust sensor board 101, the key board 102, the LED board 103, and the suction port body 40 around the circuit board 142 in the vacuum cleaner body 10. The power brush substrate 104 for the brush 43 is mounted in a distributed manner.
The circuit board 142 is disposed in the cleaner 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 of the 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 substrate 102 and the LED substrate 103 are disposed 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 that is 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 is 20.5 V) from the battery 12. The L2 terminal is a connection terminal for grounding (GND).

The output voltage B + of the battery 12 supplied from the L1 and L2 terminals is supplied to the electric blower 11 via Q4 which is a transistor as a switch. The on / off state of Q4 is controlled by a “suction drive” signal output from 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 pulse signal, and the speed of the electric blower 11, that is, the suction force can be changed by changing the on-duty ratio. .
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 stabilized power supply circuit 111 that outputs a 5V power supply through the latch circuit 106.

The latch circuit 106 is a circuit that turns on and off the 5 V stabilized power supply. The 5V power source is a power source that operates the microcomputer 110, the driver circuit 112, the dust detection circuit 114, the amplification circuit 113, the LED 501 on the dust sensor substrate, 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) has been pressed due to a change in the level of the “KEY1” signal. The voltage level of the “KEY1” signal when one of the buttons is pressed is determined by the voltage dividing 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 operation 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, Q4 of the transistor is turned on and off by the “suction drive” signal output from the microcomputer 110, and the electric blower 11 is started and stopped. Further, the LED 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 a “PB current detection” signal to the microcomputer 110. The microcomputer 110 monitors the level of the “PB current detection” signal.
When the suction port body 40 is lifted from the floor by the user, the lifting detection switch 47 (corresponding to SW301 in FIG. 12) provided on the lower surface of the suction port body 40 is turned off, and the rotary brush motor 44 and the drive roller The current to the motor 45b is cut off in a circuit. When the posture detection switch 46 (corresponding to SW302 in FIG. 12) detects the self-standing posture, 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 such that a different current value can be obtained both when the rotary brush motor 44 and the drive roller motor 45b are operating and stopped (that is, the current value is zero).

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 body 40 is in a self-standing posture or lifted. To 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 lifting detection switch 47 and the posture detection switch 46, and the level of the “PB current detection” signal. ing.
If the microcomputer 110 determines that the level of the “PB current detection” signal is a steady current flowing through R304, the microcomputer 110 stops the electric blower 11 as being in a self-supporting posture state. If it is determined that the level of the “PB current detection” signal is operating or stopped for the rotary brush motor 44 and the drive roller motor 45b (the start / stop button (SW104) is pressed during operation to receive a stop instruction) The electric blower 11 is operated except for the state.

As shown in Table 1, even when the suction port body 40 is lifted from the floor and the lifting detection switch 47 is turned off and the rotary brush motor 44 and the drive roller motor 45b are stopped, the microcomputer 110 is 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 body 40 is removed, the signal level of “PB current detection” becomes zero as in the case where the lifting detection switch 47 is turned off. Although the microcomputer 110 does not directly recognize that the suction port body 40 has been removed, the microcomputer 110 can be used as an electric vacuum cleaner because it operates the electric blower 11 even when the current value is zero.

Thus, even if there is no wiring for the microcomputer 110 to recognize the state of the lifting detection switch 47 and the posture detection switch 46 or the attachment / detachment state of the suction port body 40, the electric blower 11 operates appropriately according to the situation. And stop. According to this embodiment, the wiring connecting the cleaner body 10 and the suction port body 40 is only two power lines that drive the rotary brush motor 44 and the drive roller motor 45b in common. The connection mechanism from the vacuum cleaner main body 10 through the extension pipe 30 to the suction port body 40 can be configured simply because no wiring of switches is required.
In other words, the electric blower 11 operates when the suction port body 40 is attached and is not in a self-supporting posture and is not lifted (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 tilted posture). The microcomputer 110 does not recognize that the suction port body 40 has been removed, but operates the electric blower 11 based on the fact that the level of the “PB current detection” signal is zero current.
As described above, even with a simple configuration including only two power supply lines, the microcomputer 110 operates the electric blower 11 according to the lifting detection and the posture detection as long as the suction port body 40 is attached. Since the electric blower 11 is operated when the suction port body 40 is stopped and removed, the electric blower 11 can be used regardless of whether the suction port body 40 is attached or detached.

In this embodiment, the posture detection switch 46 is in a state in which the direction in which the extension pipe 30 extends in the front-rear direction of the suction port body 40 forms a predetermined angle (for example, 85 ° ± 5 °) with respect to the horizontal surface 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 a range corresponding to the state, and determines that the posture is an independent posture.

Next, the circuit operation when the power is turned off from the power-on state is 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 (SW 104) is pressed to stop the electric blower 11. Alternatively, a “POW_OFF” signal is output when there is no operation for a predetermined period after the posture detection switch 46 is in a self-supporting posture.

When the “POW_OFF” signal is output from the microcomputer 110 in one shot, the latch circuit that turns on the switching transistor Q1 is turned off using this signal 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 stabilized power supply circuit 111. As a result, the 5V power supply is turned off.
Next, the circuit operation when transitioning 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 substrate 102.

When either the start / stop button (SW104) or the attractive 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 stabilized power supply circuit 111, and the 5V power supply rises.
When the 5V power supply rises, the 5V voltage is supplied to the VDD terminal, which is the power supply of the microcomputer 110, and C16 connected to the RESET terminal is charged via R50, and the reset is eventually released. In this way, the processing of the microcomputer 110 is started.

Further, when the 5V power supply is started up, power is supplied to the driver circuit 112, the dust detection circuit 114, the amplification circuit 113, etc., and the respective circuits operate. As a result, the microcomputer 110 can detect the operation of the start / stop button (SW104) and the suction force switching button (SW102) by the user, and can turn on and off the LEDs 201 to 203 according to the operations. Further, the operation of the electric blower 11 can be controlled. Further, the level of the “PB current detection” signal can be read to detect whether the rotary brush motor 44 and the drive roller motor 45b are operating or stopped, and whether the suction port body 40 is in a self-supporting posture. become.

When a predetermined period (for example, 3 minutes) has passed without any operation after the start / stop button (SW104) is pressed and the electric blower 11 is stopped, the microcomputer 110 outputs a “POW_OFF” signal. Turn off the 5V power supply. In addition, even when the period has passed without any operation after the suction port body 40 is in a self-supporting posture in the power-on state, the “POW_OFF” signal is output to turn off the 5V power supply. As a result, the power of the battery 12 consumed to operate the microcomputer 110 and other circuits during standby is reduced.
Latch circuit 106 and stabilized power supply circuit 111 constitute a power supply unit according to the present invention.

[Other configurations]
FIG. 14 is a left sectional view showing the suction port body of the vacuum cleaner of FIG. 1, (A) shows a non-contact state with the bumper wall, and (B) shows a contact state with the bumper wall. Show.
As shown in FIGS. 7 and 14A, in the lower case 41a of the suction port body 40, the first space 41s ₁ that houses the rotating brush 43, and the second space 41s _{2 that} is behind the first space 41s _1. Are provided with ribs 41a _{3 serving as} partitions.

In the suction port body 40, the upper end portion of the rib 41a ₃ is joined to the front case 41c via the upper case 41b, so that the upper portion of the first space 41s _{1 and} the upper portion of the second space 41s ₂ are closed. . On the other hand, the lower end portion of the rib 41a ₃ is disposed to face the rear end portion of the suction port 41a ₁ . With this structure, the intake passage 41A ₄ that connects the suction port 41a ₁ and the second space 41s ₂ is narrowed by the rib 41a ₃ . As a result, the air stream flowing from the suction port 41a through the intake passage 41A ₄ and the second space 41s ₂ to the connecting pipe portion 42 can be enhanced suction force and high pressure, it is possible to suck dust powerful.

As shown in FIG. 3, the bumper 41 d has a concavo-convex portion 41 d ₁ formed by imitating a part of a ripple on the surface (front surface). Since the convex and concave portions in the concave and 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 attached to the concave portion is easily collected in the middle in the left and right . Further, by making the uneven shape, the area in contact with the wall is halved compared to the planar shape, so the range of scratches is reduced and the appearance is improved.

The bumper 41d is formed of a soft material such as low density polyethylene (LDPE), for example. Therefore, as shown in FIG. 14B, when the bumper 41d is pressed 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. As a result, the suction force is increased. it can.

(Embodiment 2)
15A and 15B are diagrams showing a driving roller in the suction port body of the electric vacuum cleaner according to the second embodiment, where FIG. 15A is a perspective view, FIG. 15B is a front view, and FIG. 15C is a line II in FIG. Arrow sectional drawing, (D) is the II-II arrow sectional drawing of FIG.15 (C).
The suction port body of the vacuum cleaner of Embodiment 2 is the same as the suction port body of Embodiment 1 except that the configuration of the drive roller 45a in Embodiment 1 is different. In the following, portions of the second embodiment that are different from the first embodiment will be mainly described.

The driving roller 145a of the second embodiment includes a rotating member 145a ₁ connected to the grooved belt 45c ₁ (see FIG. 7) of the rotational force transmission mechanism, and a cylindrical roller member fitted to the outer peripheral portion of the rotating member 145a _1. 45a _2, and does not have parts corresponding to the roller fixing member 45a ₃ in the driving 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 and a pair of small-diameter flange portions 145a ₁₁₃ provided on both sides of the pair of large-diameter flange portions 145a _{111 on} the outer peripheral surface at predetermined intervals in the axial direction. a main body portion 145a ₁₁ having, comprising a support block 145a ₁₃ rotatably mounted via a pin and bearing 145a ₁₂ at both ends in the axial direction of the main body portion 145a _11.

Between the one end side of the small-diameter flange portion 145a ₁₁₃ and the support block 145a ₁₃ of the main body portion 145a _11, grooved pulleys 145a ₁₁₂ constituting the rotational force transmission mechanism are integrally molded. Further, a rib having a cross-shaped cross section as shown in FIG. 15D is provided 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 rib shape need not be limited to a cross shape, and may be six, for example, by increasing the number of ribs.

When the driving roller 145a rotates, an air flow is generated by the rotating rib 145a ₁₁₄ , and when the fibrous dust such as hair or lint is wound around the rotating member 45a ₁ , the fibrous dust is flowed into the air flow and wound. Is suppressed. In the rotating member 45a ₁ of the driving roller 45a according to the first embodiment described with reference to FIGS. 9 to 11, the grooved pulley 45a ₁₁₂ and the outer flange portion 45a ₁₁₁ and the support block 45a ₁₃ and the outer flange portion 45a ₁₁₁ Between, a rib having a cross-sectional shape may be provided.

The elastic cylindrical roller member 145a ₂ having elasticity is fitted between a pair of large-diameter flange portions 145a ₁₁₁ in the rotating member 45a ₁ by expanding the diameter of the hole. Since the fitted roller member 145a ₂ shrinks and comes into close contact with the rotating member 145a ₁ , bonding with 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 thin between the both ends. Due to this thickness difference, the concave circumferential groove 145a ₂₁ is formed on the outer peripheral surface of the roller member 145a _2. 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 Generation of vibration, rattling or wobbling of the roller member 145a ₂ is suppressed, and noise can be reduced.

(Embodiment 3)
In the vacuum cleaner of Embodiment 1, although the case where the state which the suction inlet 40 was lifted was detected by the lifting detection switch 47 and it was comprised so that a power supply might be turned off, it comprised as follows. Also good. That is, the lifting detection switch 47 is omitted, a switch or a sensor is provided between the suction port body 41 and the drive roller unit 45, and the power is turned off when the state where the drive roller unit 45 is separated from the suction port body 41 is detected. You may comprise as follows. In this way, the drive roller unit 45 can also function as a lifting detection switch.

Further, the driving roller unit 45 may be configured not to swing by the shaft portion 45d ₁₁ but to adjust the load by moving the entire driving roller unit 45 up and down. In this case, the drive roller unit 45 may also function as a lifting detection switch.

(Embodiment 4)
In the case of the driving roller 45a described with reference to FIGS. 9 to 11, the roller member 45a ₂ is more likely to idle when traveling on the carpet as compared to traveling on the flooring or tatami mat, and the traveling force of the suction port body 40 Is prone to decline.
Therefore, the driving roller 45a, roller grooves 45ax between the fixed member 45a ₃ of the annular protrusions 45a ₃₂ and the outer flange 45a ₁₁₁ of the rotating member 45a _1, i.e., of the roller members 45a ₂ axial direction on both sides to a circle An annular bristle roller 45ax ₁ (two-dot chain line portion in FIG. 10) may be provided. In this case, for example, the material of the bristle roller 45ax ₁ is adhered and fixed to the groove 45ax with an adhesive. In this way, since a large frictional resistance between the bristle roller 45Ax ₁ carpet when cleaning the upper carpet is applied, it is possible to increase the travel force of the suction port body 40.
Alternatively, the outer peripheral surface of the roller member 45a ₂ may be formed in a concavo-convex shape, and this concavo-convex shape may increase the frictional resistance with the carpet to increase the running force of the suction port body 40. Furthermore, the bristle roller 45ax ₁ May be used in combination.

(Embodiment 5)
In the first embodiment, the case where the rotary brush 43 and the rotary brush motor 44 that rotates 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 rotates by the suction airflow is adopted. Alternatively, the rotating brush may be omitted.

(Embodiment 6)
In Embodiment 1, the driving roller 45a in the casing 45d, the drive roller motor 45b and the rotational force transmitting mechanism driving roller unit 45 formed by housing a swingably about the shaft portion 45d ₁₁ to the suction port body 41 The configuration in which the drive roller unit 45 is urged toward the floor surface F by the attachment and urging member is illustrated, but the drive roller 45a, the drive roller motor 45b, and the rotational force transmission mechanism are housed in the suction inlet body 41. May be. In this case, for example, a support member having a suspension function is provided in the suction port 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 driving roller is exposed to the outside through a hole provided in the bottom of the suction port body. 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 electric vacuum cleaner of the present invention is configured as follows (I) to (III).
(I) The suction port body of the vacuum cleaner according to the present invention can swing around a suction port body having a bottom surface provided with a suction port extending in the left-right direction and a left-right axial center at a rear portion of the suction port body. A connection pipe portion provided on the rotary inlet, a rotary brush provided on the suction port of the suction port main body so as to be rotatable about a left-right axis, a rotary brush motor for rotating the rotary brush, and the rotation 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 connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface.

(II) The suction port body of the vacuum cleaner of the present invention can swing around a suction port body having a bottom surface provided with a suction port extending in the left-right direction, and a left-right axial center at the rear portion of the suction port body. A connecting pipe portion provided on the bottom surface of the suction port body, a driving roller rotatably provided on the bottom surface side, a driving roller motor for rotating the driving roller, and driving and stopping the driving roller motor. A posture detection switch for switching,
The posture detection switch is configured to switch the driving roller motor from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface.

(III) The suction port body of the vacuum cleaner of the present invention can swing around a suction port body having a bottom surface provided with a suction port extending in the left-right direction, and a left-right axial center at a rear portion of the suction port body. A connection pipe portion connected to the rotary port, a rotary brush provided in the suction port of the suction port main body so as to be rotatable about a left-right axis, a rotary brush motor for rotating the rotary brush, and the suction A driving roller rotatably provided on the bottom side of the mouth body, a driving roller motor for rotating the driving roller, a posture detecting switch for switching between driving and stopping of the rotating brush motor and the driving roller motor; With
The posture detection switch is configured to switch the motor for rotating brush and the motor for driving roller from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface. .

The suction port body of the vacuum cleaner of (I) to (III) has a receiving part that connects the suction port body to the connection pipe part,
The connection pipe portion has a connection shaft portion that is swingably connected to the receiving portion of the suction port body and around a shaft center in the left-right direction,
The posture detection switch is provided in the receiving portion,
There may be provided a switch abutting portion that abuts on the posture detection switch and switches the motor from driving to stopping by swinging the connecting shaft portion.
In this way, the switch can be switched reliably with a simple configuration without using parts such as sensors.

It should be understood that the disclosed embodiments are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

40 Suction Port Body 41 Suction Port Body 41a ₁ Suction Port 41e Receiving Portion 42 Connection Pipe Portion 42a ₁ Switch Contact Portion 42x Connection Shaft Portion 43 Rotating Brush 44 Rotating Brush Motor 45a Driving Roller 45b Driving Roller Motor 46 Posture Detection Switch 100 Vacuum cleaner

Claims (5)

1. 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 about a horizontal axis; and the suction port body A rotary brush provided at the suction port so as to be rotatable about a horizontal axis, a rotary brush motor for rotating the rotary brush, and a posture detection switch for switching between driving and stopping of the rotary brush motor. ,
   The vacuum cleaner is configured to switch the rotary brush motor from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface. Air inlet of the machine.
2. 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 about a horizontal axis, and a bottom surface of the suction port body A drive roller rotatably provided on the side, a drive roller motor that rotationally drives the drive roller, and a posture detection switch that switches between driving and stopping of the drive roller motor,
   The attitude detection switch is configured to switch the drive roller motor from driving to stopping when the connection pipe portion is lifted up to a predetermined angle with respect to the suction port body on the floor surface. Air inlet of the machine.
3. A suction port body having a bottom surface provided with a suction port extending in the left-right direction; a connection pipe portion swingably connected to a rear portion of the suction port body about a lateral axis; and the suction port body A rotary brush provided at the suction port so as to be rotatable around a horizontal axis, a rotary brush motor for driving the rotary brush, and a drive roller provided at the bottom side of the suction port body. A drive roller motor that rotationally drives the drive roller, and a posture detection switch that switches between driving and stopping of the rotary brush motor and the drive roller motor,
   The posture detection switch is configured to switch the motor for the rotating brush and the motor for the driving roller from driving to stopping when the connection pipe portion is lifted to a predetermined angle with respect to the suction port body on the floor surface. A suction mouth of a vacuum cleaner characterized by
4. The suction port body has a receiving part connected to the connection pipe part,
   The connection pipe portion has a connection shaft portion that is swingably connected to the receiving portion of the suction port body and around a shaft center in the left-right direction,
   The posture detection switch is provided in the receiving portion,
   The suction of the vacuum cleaner according to any one of claims 1 to 3, further comprising a switch abutting portion that abuts on the posture detection switch and switches the motor from driving to stopping by swinging the connecting shaft portion. Mouth body.
5. A vacuum cleaner comprising the suction port according to any one of claims 1 to 4.

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