JPH04193138A - Suction port body for vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent the instability of a detecting means due to friction and improve the follow-up property of the switching action in the rotating direction of a rotor by switching and rotating a motor rotating the rotor in the detected rotating direction in the preset direction with respect to the running direction of a suction port main body. CONSTITUTION:The tip section of an extension pipe connected to a cleaner main body via a hose is connected to a connecting pipe 18. When the end section of the hose on the extension pipe side is gripped and a motor 38 is driven, running rollers 44 are rotated by a power transmission belt 53 in the grounded state, and a rotary brush 43 is rotated in the opposite direction to the running rollers 44. The forward running of a suction port main body 11 is assisted by the rotation of the running rollers 44 on the face to be cleaned. When the running direction of the suction port main body 11 is changed, a rotating direction detecting roller 20 is brought into contact with the face to be cleaned and rotated in the running direction of the suction port main body 11.

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention relates to a suction eye of a vacuum cleaner, and includes a rotating brush,
Alternatively, the present invention relates to a device in which a running roller that allows the suction port body to travel by itself can be switched and rotated in a predetermined direction with respect to the running direction of the suction port body. - (Prior art) Conventionally, as described in Japanese Patent Application Laid-Open No. 197422/1983, a detection means operates in accordance with the direction of movement of the suction port body, and a rotating brush is rotationally driven by an electric motor. A zero-suction type vacuum cleaner is known that can increase dust collection efficiency by rotating the dust in the forward or reverse direction. The suction zero detection means of this vacuum cleaner includes a detection lever that is brought into contact with the surface to be cleaned by the suction port body and swings back and forth due to the frictional resistance with the surface to be cleaned depending on the steering direction of the suction port body. The actuator of the switch is operated according to the direction of rotation of this detection lever, and the switching operation of this switch changes the rotation direction of the electric motor, and the rotation direction of this rotating brush is set to the direction of travel of the suction port body. A structure is adopted in which the rotation is made in the opposite direction.

(Problems to be Solved by the Invention) In the suction port main body having the conventional structure described above, the tip of the detection lever of the detection means is constantly sliding in contact with the surface to be cleaned, so it is easy to wear out. There is a problem in that the contact with the surface to be cleaned becomes unstable, and the switching operation of the switch cannot accurately follow the steering direction.

The present invention has been made in view of the above-mentioned problems, and includes a first rotation direction detection means consisting of a Hall sensor element that outputs an output by the rotation of a permanent magnet rotary plate, and a first rotation direction detecting means that outputs an output by rotating a photoreactive rotary plate having a photoreactive part. The electric motor that rotates a rotary body such as a rotating brush or a traveling roller is set in the running direction of the suction port body relative to the rotational direction detected by the output of the second rotational direction detection means consisting of an output optical sensor element. This eliminates instability due to wear of the detection means, allows reliable and easy detection of the running direction of the suction port body, and improves the followability of the switching operation of the rotational direction of the rotating body. To provide an improved vacuum cleaner with zero suction.

[Structure of the invention]

(Means for Solving the Problems) The suction body of the vacuum cleaner of the present invention has a suction chamber with a suction port opened on the lower surface, and a rotating body that is rotatably supported facing the suction port. A suction port body is provided, and the suction port body is provided with an electric motor whose rotation direction can be switched by a detection means for detecting the running direction of the suction port body,
The detection means includes a direction detection roller rotatably supported by the suction port body and grounded on the surface to be cleaned, a permanent magnet rotary plate that rotates as the direction detection roller rotates, and a permanent magnet rotary plate that rotates as the direction detection roller rotates. a first rotational direction detection means comprising a Hall sensor element that outputs an output by rotation; a photoreaction rotary plate having a photoreaction section that rotates as the direction detection roller rotates; and an output by rotation of the photoreaction rotation plate. and a second rotational direction detection means consisting of an optical sensor element, and the rotational direction of the electric motor is set in a predetermined direction with respect to the rotational direction detected by the outputs of the first and second rotational direction detection means. A rotating direction detection control section for switching is provided.

(Function) During cleaning, when the suction unit of the vacuum cleaner of the present invention runs the suction port body over the surface to be cleaned with the direction detection roller in contact with the surface to be cleaned, the detection roller moves in the direction of travel. As the direction detection roller rotates, the permanent magnet rotating plate of the first rotational direction detecting means is rotated, and the Hall sensor element generates a detection signal according to the N pole and S pole of the permanent magnet rotating plate. At the same time, the photoreactive rotating plate of the second rotational direction detection means is rotated, and the optical sensor element outputs a detection signal according to the photoreaction section, and the outputs of both rotational direction detection means cause the rotational direction detection control section to rotate. The rotation direction of the electric motor is switched to a predetermined direction relative to the detected rotation direction, and the rotating brush,
Alternatively, a rotating body such as a running roller can be rotated in a predetermined direction with respect to the running direction, and for example, a rotating brush can be rotated in the opposite direction to the running direction of the suction port body for efficient cleaning. Alternatively, the rotating brush or the running roller can be rotated in the running direction of the suction port main body to make the running smooth, and both the first and second rotation direction detection means are non-contact. Since the rotation direction is detected, there is no wear, and unstable operation due to wear can be prevented. The running direction of the suction port body can be detected reliably and easily, and the followability of the rotation direction switching operation of the rotating body can be improved. .

(Example) Next, the configuration of an example of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 11 denotes a horizontally elongated suction port body. Inside this suction port body 11, a horizontally elongated suction chamber 12 is partitioned in the front part, and an air passage chamber is formed in the rear part. 13 and a motor chamber 14 located on one side of the air passage chamber 13 are defined.

Furthermore, a suction port 15 is opened on the lower surface of the suction chamber 12 .

In addition, a communication pipe 1 is provided at the rear center of the suction port main body 11.
6 is supported by a rotation shaft 17 so as to be freely movable up and down at a predetermined angle. This communication pipe 16 has a front end rotatably fitted into the air passage chamber 13, and a rear part protruding rearwardly outward from the suction port main body 11.
The interior of the suction chamber 12 is in communication with the suction chamber 12 .

Furthermore, the front end of a bent connecting pipe 1g is fitted coaxially and rotatably into the rear end of the communication pipe 16.

This connecting pipe I8 is detachably connected to a hose connected to a vacuum cleaner main body (not shown) via an extension pipe, and the suction chamber 12 is cleaned via the communicating pipe 16, the connecting pipe 18, the extension pipe, and the hose. It is designed to communicate with the dust collection chamber inside the machine body.

As shown in FIG. 3, on the other side of the air passage chamber 13 of the suction port body 11, a rotation direction detection roller 20 which is rotated while being in contact with the surface to be cleaned is rotatably supported. A permanent magnet rotating plate 23 of the first rotating direction detecting means 22 is attached to the rotating shaft 21 of the direction detecting roller 20, and a hole is formed in the suction port body 11 facing the rotating surface of the permanent magnet rotating plate 23. A sensor element 24 is provided. The permanent magnet rotating plate 23 is magnetized by dividing it into an N pole and an S pole on the left and right sides along a diameter line passing through the center, and the Hall sensor element 24 is magnetized at the boundary between the N pole and the S pole. React and output. Further, the rotation shaft 21 of the direction detection roller 20 is provided with a photoreactive portion 26 of the second rotation direction detection means 25.
A photo-reactive rotary plate 27 having a rotation surface is attached, and a photo-sensor element 28 is provided within the suction port body 11 opposite to the rotating surface of the photo-reactive rotary plate 27, which outputs an output in response to the photo-reactive portion 2G. The photoreactive portion 2 of this photoreaction rotating plate 27
6 is formed facing the boundary between the north pole and the south pole of the permanent magnet rotating plate 23.

When the rotational direction detection roller 20 rotates in the forward direction, the output of the first rotational direction detection means 22 is, for example, at the S pole of the permanent magnet rotating plate 23, and the Hall sensor element 24 is detected as shown in FIG. The output of the second rotation direction detection means 22 has a waveform of H and becomes L at the N pole, and the output of the second rotation direction detection means 22 has a waveform of H, for example, by providing a time constant with a resistor 30 and a capacitor 31, as shown in FIG. Sensor element 24
overlaps with the output waveform of Further, the rotation direction detection roller 2
0 rotation in the backward direction, the first rotation direction detection means 22
The output of the second rotation direction detecting means 22 has a waveform as shown in FIG. The waveforms do not overlap.

In addition, in FIG. 4, 33 is a rotation direction detection control section,
The outputs of the first and second rotational direction detection means 22, 25 having an AND circuit 34 become H when the vehicle passes through the AND circuit 32 when traveling in the forward direction, and become L when traveling in the reverse direction. A time constant circuit consisting of a resistor 35 and a capacitor 36 is connected to this AND circuit 32, an operational amplifier 37 is connected to the connection point between the resistor 35 and the capacitor 36, and one terminal connected to one pole of the motor 38 is connected to the operational amplifier 37. connected to the field effect transistor 39 and the inverter 4
0 to the other field effect transistor 41 connected to the other pole of the motor 38. When the output of the AND circuit 32 becomes H when the suction port main body 11 travels in the forward direction, the negative field effect transistor 39 becomes conductive and the motor 38 rotates in the forward direction. 32 becomes L, the other field effect transistor 41 becomes conductive and the motor 38 is rotated in the opposite direction.

A rotary brush 43 is rotatably supported in the suction chamber 12 of the suction port body 11, and running rollers are located on both sides of the air passage chamber 13 at the rear of the suction chamber I2. 44 is provided, and this running roller 44 projects downward from an opening 45 opened on the lower surface of the suction port body 11 and is rotated in contact with the surface to be cleaned.

Furthermore, the rotating brush 43 is provided in the motor chamber 14.
The electric motor 38, which can be rotated in forward and reverse directions, is provided to rotationally drive the running roller 44.
The lower side of the pulley 48 and tension roller 49 fixed to the output shaft 47, the upper side of the pulley 51 provided on the rotating shaft 50 of the traveling roller 44, and the lower side of the pulley 52 fixed to the end of the rotating brush 43. A belt 53 for power transmission is wound around a pulley 48 fixed to an output shaft 47 of the electric motor 38, and the rotating brush 43 and the traveling roller 44 are rotated in opposite directions.

Furthermore, guide wheels (not shown) are rotatably supported on both sides of the front portion of the suction port body 11, respectively.

Further, power is supplied to the electric motor 38 through a hose, an extension pipe, and a hose, and is connected to a control section and a power supply section of the main body of the vacuum cleaner.

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

During cleaning, the tip of an extension tube connected to the cleaner body via a hose is connected to the connecting tube 18.

Then, grasp the end of the hose on the extension tube side and
8 is driven, the driving roller 44 is rotated in a grounded state by the power transmission belt 53, and the rotating brush 43 is rotated in the opposite direction to the driving roller 44.
The suction port main body 11 is assisted in forward movement on the surface to be cleaned by the rotation of the running rollers 44.

At this time, when the running direction of the suction port body 11 is changed, the rotation direction detection roller 20 comes into contact with the surface to be cleaned and is rotated in the running direction of the suction port body 11. When the rotation direction detection roller 20 rotates in the forward direction, the outputs of the first rotation direction detection means 22 and the second rotation direction detection means 25 become H by the AND circuit 32, and when the output of the AND circuit 32 becomes H, , one field effect transistor 39 is turned on, the electric motor 38 is rotated in the forward direction, the traveling roller 44 is rotated in the traveling direction, and the rotating brush 43 is rotated in the opposite direction to the traveling roller 44.

Further, when the rotation direction detection roller 20 rotates in the backward direction, the outputs of the first rotation direction detection means 22 and the second rotation direction detection means 25 become L by the AND circuit 32, and the output of the AND circuit 32 becomes L. Then, the other field effect transistor 41 becomes conductive and the electric motor 38 is rotated in the opposite direction, and the traveling roller 44 is rotated in the backward direction of the traveling direction.
The rotating brush 43 is rotated in the opposite direction to the traveling roller 44.

In the embodiment described above, the transmission mechanism from the electric motor 38 to the traveling roller 44 and the rotating brush 43 includes an output shaft 47 connected to the electric motor 38.
A power transmission belt 53 is sequentially wound around the pulley 48, tension roller 49, pulley 51 of the rotating shaft 50 of the running roller 44, and pulley 52 of the rotating brush 43, and the rotating brush 43 and the running roller 44 are rotated in opposite directions. Although the structure is such that the rotating brush 43 is rotated in the direction shown in FIG.
Although the rotating brush 43 is rotated in the opposite direction to the running direction of the suction port main body 11, it is also possible to rotate the rotating brush 43 in the same direction as the running roller 44.

〔Effect of the invention〕

According to the present invention, during cleaning, by running the suction port body over the surface to be cleaned with the direction detection roller in contact with the surface to be cleaned, the detection roller is rotated according to the running direction, and the detection roller is rotated in this direction. As the detection roller rotates, the permanent magnet rotating plate of the first rotation direction detecting means is rotated, and the Hall sensor element outputs a detection signal according to the N pole and S pole of the permanent magnet rotating plate, and at the same time, the second rotation direction is rotated. The light reaction rotary plate of the direction detection means is rotated, and the light sensor element outputs a detection signal according to the light reaction part, and the rotation direction detection control part detects the detected rotation direction based on the output of both rotation direction detection means. The rotating direction of the electric motor can be switched to a predetermined direction, and a rotating body such as a rotating brush or a traveling roller can be rotated in a predetermined direction relative to the running direction. The rotary brush can be rotated in the opposite direction to enable efficient cleaning, or the rotary brush or the traveling roller can be rotated in the traveling direction of the suction port body to make the traveling smooth. Since both the first and second rotational direction detection means detect the rotational direction without contact, there is no wear, and unstable operation due to wear can be prevented, and the running direction of the suction port body can be reliably and easily detected. , it is possible to improve the followability of the switching operation of the rotational direction of the rotating body.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a vacuum cleaner showing an embodiment of the present invention with the upper cover of the suction body removed; Fig. 2 is a vertical sectional view of the same; Fig. 3 is an exploded perspective view of the detection means of the above. , FIG. 4 is a circuit diagram of the same as above, and FIG. 5 is an output waveform of the same as above detecting means. DESCRIPTION OF SYMBOLS 11... Suction port main body, 12... Suction chamber, 15... Suction port, 22... First rotational direction detection means, 23... Permanent magnet rotating plate, 24... Hall sensor element, 25... Second rotational direction detection means, 26..photoreaction section, 27..photoreaction rotary plate, 28..photosensor element, 33..rotation direction detection control section, 38..electric motor, 43..rotating brush, 4.
4...Roller for running.

Claims (1)

[Claims] (1) A suction port main body having a suction chamber with a suction port opened on the lower surface and a rotary body supported rotatably facing the suction port, the suction port main body having a suction chamber with a suction port opening thereon, and a suction port main body having a suction chamber with a suction port opened on the lower surface thereof, and a rotating body that is rotatably supported so as to face the suction port; an electric motor whose rotational direction can be switched by a detection means for detecting the direction of rotation; a first rotational direction detection means consisting of a permanent magnet rotating plate that rotates with the rotation of the permanent magnet rotating plate and a Hall sensor element that outputs an output due to the rotation of the permanent magnet rotating plate; and a photoreaction section that rotates with the rotation of the direction detection roller. and a second rotational direction detecting means consisting of a photoreactive rotary plate and a photosensor element that outputs an output based on the rotation of the photoreactive rotary plate, and the rotational direction is detected by the outputs of the first and second rotational direction detecting means. A suction mouth body for a vacuum cleaner, characterized in that a rotation direction detection control section is provided for switching the rotation direction of the electric motor to a predetermined direction with respect to the rotation direction of the electric motor.