JPH0693873B2 - Vacuum cleaner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric vacuum cleaner provided with a rotary brush driven by a motor.

[Prior Art] FIG. 3 is a plan sectional view of a dust suction nozzle casing of an electric vacuum cleaner equipped with a rotary brush driven by a motor, which is a so-called power brush, and FIG. 4 is a side sectional view thereof. is there.

In both figures, (1) is a casing, (2) is an air inlet, (3) is a rotary brush, (3a) is the brush,
(4) is a motor, (5) is a belt, (6) is an electric circuit section, (7) is a hose connection section, (8a), (8b) and (9).
a) and (9b) are left and right rear wheels and front wheels, (10) is a power connector, and (11) is a floor surface.

In the conventional power brush having the above structure, the motor (4)
Turn on the power of and rotate the rotary brush (3),
The dust accumulated between the hair legs such as a carpet is scraped out and sucked together with the air. Therefore, such a power brush can exert a cleaning effect particularly for cleaning the carpet floor. When the floor surface (11) is a flat floor or a folding floor, this power brush stops the rotation of the rotary brush (3) to allow dust and dust on the floor surface (11) together with air from the air intake port (2). Is being sucked in as is.

[Problems to be Solved by the Invention] As described above, when cleaning a floor using a power brush, the rotary brush is stopped when the floor is a flat floor or a folding floor, and is rotated only when the floor is a carpet floor. Has become.
For this reason, while using the vacuum cleaner, while constantly looking at the floor surface, the manual motor switch must be turned on when moving to the carpet, and turned off when the floor or folding floor is inconvenient. is there. Also, since switching is troublesome,
For example, while cleaning the rotary brush,
Sometimes I move to the next carpet floor across a narrow wooden floor. However, idling the motor in this manner wastes power and is uneconomical.

The present invention has been made to solve the above-mentioned conventional problems, and an electric cleaning system with a floor surface detector capable of automatically detecting the presence or absence of a carpet or the like to drive or stop the rotary brush. Aim to get the opportunity.

[Means for Solving the Problems] In order to achieve the above object, an electric vacuum cleaner according to the present invention has a floor brush main body having a rotary brush inside a suction opening, and a floor brush main body on both sides of the floor brush main body. A hose mounting member located on the rear side, the end of which is rotatably supported by the floor brush main body, which protrudes from the bottom surface of the floor brush main body and is substantially symmetrical about the center line and the length of the floor brush main body. A traveling wheel composed of a front wheel and a rear wheel arranged at a width substantially the same as the width in the direction, and a rear wheel arranged at a width narrower than the front wheel, and is supported on the floor brush so as to be vertically movable so as to be exposed.
A floor surface detector having a floor sensor for controlling the rotation of the rotary brush is provided, which is within a trapezoidal area connecting the respective center points of the traveling wheels, and is a rotational joint between the hose mounting member and the floor brush main body. Behind the intersection of a straight line that passes through the center of rotation of the section and that is parallel to the center line of the hose mounting member, and the bottom surface of the floor brush body,
Moreover, a floor surface detector is arranged between the rear wheels.

[Operation] When the floor sensor of the floor detector provided on the lower surface of the casing of the power brush comes into contact with the floor and touches a carpet or the like, the wheels are pushed up to operate, and the rotary brush is activated by the output signal. When the wheels come off the carpet, the rotary brush is automatically stopped.

In addition, the floor surface detector mounted on the lower surface of the casing of the power brush in a plane surrounded by a plurality of wheels is designed to keep the floor sensor in contact with the floor surface at a stable and proper interval. The floor detector operates properly and controls the rotation and stop of the rotary brush without causing a malfunction when touching a carpet or the like.

Further, by arranging the floor surface detector on the surface behind the point where the parallel line with the center line of the hose mounting member intersects with the lower surface of the casing, passing through the center of the joint between the casing and the hose mounting member, Even when the brush is moved forward and backward along the floor surface, and even when it is pulled closer to the user's hand, the floor surface detector does not always float above the floor surface, keeps a stable state, and accurately rotates the rotary brush. It can be controlled.

[Embodiment] FIG. 1 is a bottom view of a casing according to an embodiment of the present invention. In the figure, the broken lines W, X, Y, Z are the rear wheels (8a), (8b),
A straight line connecting the center points of the front wheels (9a) and (9b), (20)
Is a floor detector provided on the lower surface of the casing (1), (21)
Is a floor sensor. Floor sensor (21) is floor detector (20)
It is mounted inside the room so that it can move up and down together with the rotary shaft. It detects the presence or absence of a carpet by the up and down movement of the floor sensor (21) and outputs a signal corresponding to this to drive the motor that drives the rotary brush (3). It is designed to be controlled. Further, as shown in the figure, the floor surface detector (20) has broken lines W, X, Y,
It is provided on the underside of the casing (1) in the area surrounded by Z.

Next, this action will be described. Since the present invention has such a configuration, if the lower surface of the casing (1) is brought into contact with the floor surface (11), the rear wheels (8a) provided on the lower surface of the casing (1),
(8b) and front wheels (9a), (9b) contact the floor surface (11),
Hold an appropriate gap. Therefore, in the plane surrounded by the straight lines W, X, Y, Z, the rear wheels (8a), (8b), the front wheels (9a), (9b) are always
By this, a gap is maintained between the floor surface (11) and the lower surface of the casing (1), and the floor surface detector (20) can always maintain a stable state and control the rotation of the rotary brush (3). I can.

FIG. 2 is a view corresponding to the AA cross section of FIG. 1 showing another embodiment of the present invention. In FIG. 2, P is the rotation center of the rotary joint between the hose mounting member (7) and the casing (1), S is the center line of the hose mounting member (7), and L is the rotation center P. A parallel line of the center line S, M is an intersection of the parallel line L and the lower surface of the casing (1), (7a) is an operating rod fitted to the hose mounting member (7), and (21) is a floor surface detector ( 20) Floor sensor.

In this embodiment, the floor surface detector (20) is arranged behind the point M on the lower surface of the casing (1).

Next, this operation will be described. The user of the electric vacuum cleaner operates the operating rod (7) on the extension line of the hose mounting member (7).
The hose mounting member (7) and the casing (1) are rotated around the point P, and the crossing angle is changed. As a result, the casing (1) moves by fitting to the floor surface (11), but when the casing (1) moves forward, the intersection point M becomes an action point on the lower surface of the casing (1), and a force for pulling it up is generated. It is easy to occur. When the casing (1) retracts, a pressing force is applied to the intersection point M on the lower surface of the casing (1), and the surface area after the intersection point M does not float up. For this reason, the floor surface detector (20) arranged in this area is kept stable with respect to the floor surface (11) and does not malfunction, so that the rotation of the rotary brush (3) can be controlled. I can.

[Effects of the Invention] As described above, according to the present invention, a floor brush main body having a rotary brush inside the suction port, is located on the rear side substantially on the center line between both sides of the floor brush main body, and its end is A hose mounting member rotatably supported by the floor brush main body, protruding from a bottom surface of the floor brush main body and arranged substantially symmetrically with respect to the center line and having a width substantially equal to a longitudinal width of the floor brush main body. A front wheel and a traveling wheel composed of a rear wheel arranged with a narrower width than the front wheel, exposed on the bottom surface of the floor brush and supported so as to be vertically movable,
A floor surface detector having a floor sensor for controlling the rotation of the rotary brush is provided, which is within a trapezoidal area connecting the respective center points of the traveling wheels, and is a rotational joint between the hose mounting member and the floor brush main body. Behind the intersection of a straight line that passes through the center of rotation of the section and that is parallel to the center line of the hose mounting member, and the bottom surface of the floor brush body,
In addition, the electric vacuum cleaner has a floor surface detector arranged between the rear wheels.

As a result, shocks and vibrations during traveling are received by the traveling wheels and are not directly transmitted to the floor surface detector, so the performance of the floor surface detector is stable and the life is long.

Since the traveling wheels stably drive the floor surface, the accuracy of the floor surface detector is improved.

Since the floor surface detector is provided behind the intersection of the straight line that passes through the center of the joint between the hose mounting member and the floor brush main body and is parallel to the center line of the hose mounting member and the lower surface of the floor brush main body, for example, the floor brush main body When pulling back, the front of the floor brush body tends to bounce, but the back does not bounce, which prevents malfunction.

Also, since the floor surface detector is placed between the narrow rear wheels behind the intersection of the straight line parallel to the center line of the hose mounting member and the lower surface of the floor brush main body, the force applied to the hose mounting member is not The wheels absorb and protect the floor detector, improving detection accuracy.

[Brief description of drawings]

FIG. 1 is a bottom view of a casing of a power brush according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a plan sectional view of a conventional example, and FIG. 4 is a side sectional view. is there. In the figure, (1) is a casing, (3) is a rotary brush, (7) is a hose mounting member, (8a) and (8b) are rear wheels, (9a) and (9b) are front wheels, and (11) is Floor surface, (20) is a floor surface detector, and (21) is a floor sensor. In each drawing, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takahiro Yanagida 1728 Omaeda, Omaeda, Hanazono-cho, Oza-gun, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (56) Reference JP-A-54-57362 (JP, A) 54-63556 (JP, A)

Claims (1)

[Claims] 1. A floor brush main body having a rotary brush inside a suction port, which is located on the rear side substantially on the center line between both sides of the floor brush main body, and an end of which is rotatably supported by the floor brush main body. A hose mounting member, a front wheel protruding from a bottom surface of the floor brush main body, arranged substantially symmetrically with respect to the center line, and having a width substantially equal to a longitudinal width of the floor brush main body, and a width narrower than the front wheel. A traveling wheel composed of rear wheels arranged in, exposed on the bottom surface of the floor brush and supported so as to be vertically movable,
A floor surface detector having a floor sensor for controlling the rotation of the rotary brush is provided, which is within a trapezoidal area connecting the respective center points of the traveling wheels, and is a rotational joint between the hose mounting member and the floor brush main body. Behind the intersection of a straight line that passes through the center of rotation of the section and that is parallel to the center line of the hose mounting member, and the bottom surface of the floor brush body,
An electric vacuum cleaner in which the floor surface detector is arranged between the rear wheels.