JPH0252623A - Vacuum cleaner with floor surface detector - Google Patents

Abstract

PURPOSE:To automatically detect the existence of a carpet, etc., and to drive or stop a rotary brush by providing a floor surface detector on the lower surface of the casing of a power brush. CONSTITUTION:In a vacuum cleaner in a system to rotate a rotary brush 3 with a motor, a floor surface detector 20 equipped with a sensor wheel 21 energized movably upward and downward by an elastic material is provided on the lower surface of a casing 1 of the power brush. As a result, since the rotary brush 3 can be automatically driven or stopped according to the existence of the carpet, etc., on the floor surface, the operation of a switch is made unnecessary, and a power is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum cleaner equipped with a rotary brush driven by a motor.

[Prior Art] Fig. 3 shows a dust suction nozzle casing for a vacuum cleaner equipped with a rotary brush driven by a motor, and Fig. 4 is a cross-sectional plan view of the so-called power brush, and Fig. 4 is a side sectional view thereof. It is.

In both figures, (1) is the casing, (2) is the air intake port, (3) is the rotary brush, (3a) is the brush,
(4) is the motor, (5) is the belt, (6) is the electric circuit, (7) is the hose connection, (8a), (8b) and (
9a).

(9b) are left and right rear wheels and front wheels, (1o) is a power connector, and (11) is a floor surface.

In the conventional power brush configured as described above, the motor (4)
When you turn on the power and rotate the rotary brush (3),
Dust that has accumulated between the hairs of carpets, etc. is scraped out and sucked in with the air. Therefore, such a power brush can be particularly effective in cleaning carpeted floors. In addition, when the floor surface (11) is a wooden floor or a folded floor, this power brush stops the rotation of the low cleaner brush (3) and removes dust and dirt on the floor surface (11) along with air from the air intake port (2). It is designed to be sucked in as it is.

[Problem to be solved by the invention] As mentioned above, when cleaning a floor surface using a power brush, the power brush should be stopped when cleaning wooden floors or folded floors, and rotated only when cleaning carpeted floors. It looks like this. For this reason, while using the vacuum cleaner, constantly look at the floor.
When moving to a carpet, the manual motor must be turned on, and when moving to a wooden or folded floor, it must be turned off, making handling operations extremely troublesome. In addition, since switching is troublesome, for example, in the middle of cleaning, you may have to leave the rotary brush rotating and move on to cleaning an adjacent carpet floor across a narrow wooden floor. However, if the motor is idled in this way, electric power is wasted and becomes uneconomical.

The present invention was made in order to solve the above-mentioned conventional problems, and provides a vacuum cleaner with a floor detector that can automatically detect the presence or absence of a carpet, etc. and drive or stop the low cleaner brush. The purpose is to obtain.

[Means for Solving the Problems] In order to achieve the above object, the vacuum cleaner with a floor surface detector according to the present invention includes a sensor that is biased to be movable up and down by an elastic material on the lower surface of the casing of the power brush. It is equipped with a floor detector equipped with wheels.

Further, a floor surface detector is disposed within a plane surrounded by a line connecting the centers of a plurality of wheels attached to the lower surface of the casing of the power brush and supporting the casing.

Further, a floor surface detector is disposed behind the point where a straight line passing through the center of the joint between the hose attachment member of the casing and the casing and parallel to the center line of the hose attachment member intersects the lower surface of the casing.

[Function] When the sensor wheel of the floor detector installed on the underside of the power brush casing comes into contact with the floor and touches a carpet, etc., the wheel is pushed up and activated, and the output signal activates the low cleaner brush. . When the wheel comes off the carpet, etc., the lorry brush automatically stops.

In addition, the floor detector installed in the city surrounded by multiple wheels on the underside of the power brush casing always maintains a stable and appropriate distance from the floor, and makes sure that the sensor wheels are in contact with the floor. This allows the floor surface detector to operate accurately and control the rotation and stop of the rotary brush without causing malfunctions when it comes into contact with a carpet, etc.

Furthermore, by arranging a floor surface detector on a surface passing through the center of the joint between the casing and the hose mounting member and behind the point where a line parallel to the center line of the hose mounting member intersects with the lower surface of the casing, the power Even when moving the brush forward and backward along the floor, and even when pulling it closer to the user's hand, the floor detector always remains stable and does not rise above the floor, allowing accurate rotation of 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, broken lines w, x, y, z indicate the rear wheels (8a), (
8b), a straight line connecting the center points of the front wheels (9a) and (9b), (20) a floor detector provided on the lower surface of the casing (1), and (21) a sensor wheel. The sensor wheel (21) is attached to the inside of the floor detector (20) so as to be able to move up and down along with the rotating shaft.
The vertical movement of the rotary brush (3) detects the presence or absence of a carpet, etc., and outputs a corresponding signal to control the motor that drives the rotary brush (3).

Further, as shown in the figure, the floor detector (20) is indicated by broken lines W and X.

It is provided on the lower surface of the casing (1) in the area surrounded by Y and Z.

Next, this effect will be explained. 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 wheel (8a) provided on the lower surface of the casing (1)
), (8b) and the front wheels (9a), (9b) contact the floor (11) and maintain an appropriate gap. Therefore,
The area surrounded by straight lines w, x, y, and z is always the rear wheel (8a)
, (8b), by the front wheels (9a), (9b),
A gap is maintained between the floor surface (11) and the lower surface of the casing (1), so that the floor surface detector (20) can always maintain a stable state and control the rotation of the rotary brush (3).

FIG. 2 is A-Alf of FIG. 1 showing another embodiment of the present invention.
This is a diagram corresponding to the i-plane. In Fig. 2, P is the rotation center of the rotation joint between the hose attachment member (7) and the casing (1), S is the center line of the hose attachment member (7), and L is the rotation center P. A parallel line to the center line S passing through, M is the intersection of the parallel line and the lower surface of the casing (1), (7a) is the operating rod that fits into the hose attachment member (7), (21) is the floor detector (2
0) sensor wheel.

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

Next, this effect will be explained. The user of the vacuum cleaner must press the operating rod (7a), which is an extension of the hose attachment member (7).
), but at this time, hold the hose attachment member (7).
and casing (1) rotate around point P and change their intersection angle. This allows the casing (1
) moves while fitting the floor surface (11), but when the casing (1) moves forward, the casing (
1) On the lower surface, the intersection point M becomes a point of action and tends to generate an upward pulling force.

When the casing (1) retreats, the casing (1)
A pressing force is applied to the intersection point M on the lower surface of , and the surface area after the intersection point M does not rise. Therefore, the floor surface detector (20) disposed in this surface area is
), the rotation of the rotary brush (3) can be controlled without malfunction by always maintaining a stable state.

[Effects of the Invention] As described above, according to the present invention, by providing a floor detector on the lower surface of the casing of the power brush, the rotary brush can be automatically driven depending on the presence or absence of a carpet, etc. on the floor. Since it can be turned on or off, there is no need to operate a switch, which saves power.

In addition, by arranging the floor detector on the lower surface of the casing within the plane surrounded by multiple wheels that support the casing, it is possible to prevent the malfunction of the floor detector and prevent the rotary brush from being exposed to shock. The rotation of can be controlled.

In addition, a floor detector is installed behind the intersection of the parallel line of the center line of the hose mounting member and the lower surface of the casing, centering on the rotational joint between the casing and the hose mounting member, so that the casing can be moved to the floor. Even if the floor detector is moved back and forth along the floor surface, the rotation of the rotary brush can be controlled in a stable state with respect to the floor surface.

[Brief explanation of the drawing]

Fig. 1 is a bottom view of a power brush casing according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a plan sectional view of a conventional example, and Fig. 4 is a side sectional view. It is a diagram. In the figure, (1) is the casing, (3) is the rotary brush, (7) is the hose attachment member, (8a) = (8b
) is the rear wheel, (9a) and (9b) are the front wheels, (11
) is the floor surface, (20) is the floor surface detector, and (21) is the sensor wheel. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Patent Attorney Muneharu Sasaki

Claims (3)

[Claims] (1) A vacuum cleaner in which a rotary brush is rotated by a motor, characterized in that a floor detector equipped with a sensor wheel that is biased to be movable up and down by an elastic material is provided on the underside of the casing of the power brush. An electric vacuum cleaner with a floor detector. (2) The floor detector according to claim (1), characterized in that the floor surface detector is disposed within a plane surrounded by a line connecting the centers of each of a plurality of wheels provided on the lower surface of the casing of the power brush. Vacuum cleaner with floor detector. (3) A floor detector is installed behind the intersection of the lower surface of the casing and a straight line that passes through the center of the joint between the upper hose attachment member of the power brush casing and the casing and is parallel to the center line of the hose attachment member. The vacuum cleaner with a floor surface detector according to claim 1, characterized in that: