JPH06343583A - Suction port body of vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the suction port body of a vacuum cleaner, which can stop surely a rotary blade without generating a malfunction, in the case the suction port main body is turned upward. CONSTITUTION:Light emitted from light emission diodes LED1, LED2 is reflected by the detection surface and received by phototransistors FTR1, FTR2. When it is reflected by a white reflecting surface, the phototransistor FRT1 outputs an H level, and when it is reflected by a black non-reflecting surface, the phototransistor FRT2 outputs an L level. Even if a rotary roller is rotated by inertia, a reflection of light to each photosensor 59a, 59b is cut off, and a motor 31 is stopped. Since a reference voltage of an operational amplifier OP1 has a hysteresis, unless an output of the photosensor 59a is varied more largly than an output reflected on a gray shielding body, an output of the operational amplifier OP1 is not varied. When the suction port main body is turned over or returned to the original state, such a malfunction as the motor 31 is reactuated can be prevented even if the rotary roller rotates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner for rotating a rotating body based on a traveling direction detected by traveling direction detecting means.

[0002]

2. Description of the Related Art Conventionally, as a suction port body of this type of vacuum cleaner, the structure is complicated by detecting whether or not the suction port body is moving on the surface to be cleaned and the traveling direction of the suction port body. It is known to rotate the cleaning element in a desired direction when necessary without doing so. Specifically, a rotary roller exposed on the lower surface of the suction port body, a detection roller interlocked with the rotary roller, and a sensor for detecting the rotation of the detection roller are provided. The detection roller forms a plurality of detection surfaces along the circumferential direction, and during rotation of the rotating roller, the sensor detects different pulse-shaped signals corresponding to the respective detection surfaces, so that the sensor is rotated in the rotation direction. It detects the state such as. When the suction port body is stopped on the surface to be cleaned, the rotating roller does not rotate and the signal of the sensor does not change, so that the cleaning body is stopped and the suction port body moves on the surface to be cleaned. Rotates or stops the cleaning body by rotating the rotating roller and changing the signal of the sensor. Furthermore, the rotation direction of the cleaning element is set to a predetermined direction by a signal corresponding to each detection surface.

[0003]

However, the suction port body of the vacuum cleaner having the above-mentioned conventional structure merely detects the advancing direction of the suction port main body based on the rotation direction of the rotating roller. Even when the cleaning device is exposed with the mouth body facing upward, the rotary roller may rotate, which is not preferable in terms of operation or power saving.

Further, since the rotating roller is exposed on the lower surface, the inertial force of the rotating roller, even when the suction port body is turned upside down,
There is a problem that the cleaning element may rotate due to rotation of the roller due to contact with the roller.

The present invention has been made in view of the above problems, and an object thereof is to provide a suction port body of an electric vacuum cleaner which can surely stop the rotating body without causing a malfunction when the main body faces upward. And

[0006]

A suction port body for an electric vacuum cleaner according to claim 1 has a main body having a suction port opening to face a surface to be cleaned, and forward and reverse rotations disposed in the main body. A free electric motor, a rotating body rotated by the electric motor, a traveling direction detecting means for detecting a traveling direction of the main body, and a control means for controlling driving of the electric motor based on the direction detected by the traveling direction detecting means. In the suction port body of the electric vacuum cleaner provided with, the advancing direction detecting means includes a rotating means having a plurality of detecting surfaces formed along a circumferential direction and driven by the movement of the main body, and a gap between the rotating means. And a non-contact type sensor which detects the detection surface in a non-contact state and outputs a pulsed signal, and a suction port of the main body which is provided between the detection surface of the rotating means and the sensor faces upward. If it is And a shielding means for shielding between the surfaces and the sensor, the control means first signals from the sensor after the shielding means has shielding between the detection surface and the sensor is to ignore.

The suction port body of the electric vacuum cleaner according to claim 2 is
A main body having a suction opening that faces the surface to be cleaned, a forward / reverse rotatable electric motor disposed in the main body, a rotating body rotated by the electric motor, and a traveling direction of the main body is detected. In a suction port body of an electric vacuum cleaner comprising a traveling direction detecting means and a control means for controlling the drive of the electric motor based on the direction detected by the traveling direction detecting means,
The traveling direction detecting means includes two kinds of detecting surfaces formed along the circumferential direction, the rotating means being driven according to the movement of the main body, and the detecting means provided in the rotating means with a gap therebetween in a non-contact state. A non-contact type sensor that detects and outputs a signal of a different value, and shields between the detection surface and the sensor when the suction port of the main body, which is provided between the detection surface of the rotating means and the sensor, is directed upward. The sensor outputs a signal having an intermediate value of the different signals when the shielding unit shields between the detection surface and the sensor, and the control unit inputs the signal from the sensor. It has a hysteresis characteristic.

The suction port body of the electric vacuum cleaner according to claim 3 is
A main body having a suction opening that faces the surface to be cleaned, a forward / reverse rotatable electric motor disposed in the main body, a rotating body rotated by the electric motor, and a traveling direction of the main body is detected. In a suction port body of an electric vacuum cleaner comprising a traveling direction detecting means and a control means for controlling the drive of the electric motor based on the direction detected by the traveling direction detecting means,
The advancing direction detecting means includes a rotating means that is formed with a plurality of detecting surfaces along the circumferential direction and that follows the movement of the main body,
A non-contact sensor provided on the rotating means with a gap to detect the detection surface in a non-contact state, a pair of contact terminals for transmitting a signal, and the detection surface of the rotating means and the sensor. It is provided with a conductive shielding means which is provided and shields between the detection surface and the sensor and short-circuits between the contact terminals when the suction port of the main body is directed upward.

[0009]

The suction port body of the electric vacuum cleaner according to claim 1 detects the traveling direction of the main body by the traveling direction detecting means, and the control means rotates forward and backward of the electric motor based on the direction detected by the traveling direction detecting means. The direction is controlled to control the rotation direction of the rotating body. When the rotation means is driven by the movement of the main body, the traveling direction detection means detects the detection surface of the rotation means in a non-contact state by the contact type sensor, and when the suction port of the main body is directed upward, By shielding between the sensors with the shielding means, the control means ignores the first signal output after the shielding means shields between the detection surface and the sensors,
When the shielding means moves to shield the detection surface and the sensor, the rotating body is prevented from malfunctioning even if an erroneous signal is output by the shielding means.

The suction port body of the electric vacuum cleaner according to claim 2 is
The traveling direction detection means detects the traveling direction of the main body, and the control means controls the forward and reverse rotation directions of the electric motor based on the direction detected by the traveling direction detection means to control the rotation direction of the rotating body. Then, when the rotating means is driven by the movement of the main body, the traveling direction detecting means detects the two detection surfaces of the rotating means in a non-contact state by the contact type sensor and outputs signals of different values to suck the main body. When the mouth is directed upwards and the shielding means shields between the detection surface and the sensor, the sensor outputs a signal having an intermediate value of different signals, and the control means has a hysteresis characteristic so that the shielding means moves and the detection surface is moved. Also, an erroneous signal is not output when the sensors are shielded from each other, which prevents the rotating body from malfunctioning.

The suction port body of the electric vacuum cleaner according to claim 3 comprises:
The traveling direction detection means detects the traveling direction of the main body, and the control means controls the forward and reverse rotation directions of the electric motor based on the direction detected by the traveling direction detection means to control the rotation direction of the rotating body. When the rotation means is driven by the movement of the main body, the traveling direction detection means detects the detection surface of the rotation means in a non-contact state by the contact type sensor, and when the suction port of the main body is directed upward, The shielding means shields between the sensors, and the shielding means is short-circuited between the pair of contact terminals to which a signal is transmitted, so that the operation of the rotating body is surely stopped.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, reference numeral 11 designates a suction port main body having a rectangular shape which is horizontally long with respect to the traveling direction.
Is composed of a lower body case 12 and an upper body case 13 which is fixedly coupled to the upper portion of the lower body case 12, and the lower body case 12 is formed to prevent the lower body case 12 from being twisted or distorted. Bottom plate 12a of main unit case 12
The cover 12b for covering the bottom plate 12a and the cover 12b are fixed together by screws 12c.

The suction port main body 11 has a horizontally long suction chamber 14 defined in the front side which is the advancing direction side, and a rear central portion which is the retreating direction side.
An air passage chamber 15 communicating with the suction chamber 14 is defined and formed, and the electric motor chambers are provided on both sides of the air passage chamber 15 in the left-right direction.
16 and the control room 17 are partitioned and formed. A suction port 18 of the suction chamber 14 is formed on the lower surface of the suction port body 11 that faces a floor surface (not shown) as a surface to be cleaned.

Further, in the central portion of the rear end of the suction port body 11,
A communication pipe 21 communicating with the suction chamber 14 via the air passage chamber 15 is attached rotatably at a predetermined vertical angle. Further, at the front end portion of the communication pipe 21, a substantially tubular turning shaft portion 22 having the left-right direction as the axial direction and having the front side opened is provided, and the turning shaft portion 22 serves as the air duct chamber 15. Is rotatably fitted inside and communicates with the substantially central portion of the suction chamber 14 through the air passage chamber 15.

On the other hand, the rear end portion of the communicating pipe 21 projects rearward outward from the suction port main body 11, and at the rear end portion thereof, the front end portion of the connecting pipe 23 bent in a substantially V shape. Is rotatably fitted. The rear end of the connecting pipe 23 is connected to the cleaner body via a straight tubular extension pipe, a hose, etc., which are not shown.

In this way, the suction chamber 14 of the suction port main body 11
Communicates with the dust collection chamber of the cleaner body through the air duct chamber 15, the communication pipe 21, the connection pipe 23, the extension pipe, and the hose.

In addition, a state in which a rotary blade 24 as a rotating body is rotatably supported in the suction chamber 14 at both longitudinal ends by bearings 24b provided at both longitudinal ends of the suction chamber 14. It is installed in. The rotary blade 24 includes a plurality of plate-shaped blade portions made of rubber or the like.
24a is projected in a spiral shape, and this blade part
The tip of 24a does not come into contact with the flat floor surface such as between the boards, but slightly from the suction port 18 so that it does not come into contact with the uneven floor surface such as a carpet or tatami mat. It is provided so as to project downward.

Further, on the rear side of the suction port 18, there are formed a pair of rectangular opening portions 25 opening toward the lower surface, and facing the respective opening portions 25, each has a substantially cylindrical shape as a rotating body. The traveling wheel 26 of is attached. The traveling wheels 26 are axially supported on both sides of the air duct chamber 15 via a shaft 27 which is a rotating shaft.
Through the openings 25, the outer peripheral surface of 26 does not come into contact with the flat floor surface such as between the boards, but does not come into contact with the floor surface of a material having a raised surface such as a carpet or tatami mat. It is provided so as to slightly project from the lower surface of the main body case 12.

In the vicinity of both ends of the front and rear portions of the suction port main body 11, substantially cylindrical auxiliary wheels 28 are rotatably supported in a state of protruding from the lower surface of the lower main body case 12, The suction port main body 11 moves back and forth on the floor surface by these auxiliary wheels 28.

Further, a plate-like seal lip 29 made of resin, for example, is attached to the lower front portion of the suction port main body 11 along the front side of the suction port 18 in a state of protruding toward the floor surface. The airtightness of the suction chamber 14 is improved, and, for example, the ability to capture dust on the wall is improved.

Further, in the electric motor chamber 16, an electric motor 31 for rotating the rotating blade 24 and the running wheel 26 is provided which is rotatable in forward and reverse directions.

The output shaft of the electric motor 31 and the running wheels 26
Pulleys 32, 33, 34 are respectively attached to one end of the shaft 27 and one end of the rotary blade 24.
A belt 35 for power transmission is wound around these pulleys 32, 33, 34 so that the traveling wheel 26 rotates forward in the traveling direction and the rotary blade 24 reverses in the traveling direction. Outputs from the electric motor 31 are transmitted so as to rotate.

Further, in the control room 17, a traveling direction detecting means 41 for detecting the traveling direction, and a control for judging and converting a detection signal output from the traveling direction detecting means 41 to control the driving of the electric motor 31. Means 42 are provided.

Further, the traveling direction detecting means 41 has a substantially box-shaped switch case body 44 having an opened lower surface, as shown in FIGS. 4 and 5. And this switch case body
In 44, a vertical partition 45 is formed substantially in the center in the left-right direction, and a detection chamber 46 and a sensor chamber 47 are defined and formed, and the sensor chamber 47 is fixed by a screw 48. The cover body 49 closes the lower surface to prevent dust from entering.

Then, these detection chamber 46 and sensor chamber 47
A substantially columnar rotary shaft 51 that constitutes a rotary member is rotatably disposed so as to pass through and in the left-right direction. Further, the rotating shaft 51 is made of metal and is provided at the substantially central portion in the longitudinal direction.
A bearing 52 having a substantially annular shape and conductivity is rotatably fitted. The bearing 52 is closely sandwiched between the lower end of the partition wall 45 and the upper end of one side of the case cover body 49, and the rotating shaft 51 is rotatably supported. Bearing 52, sensor chamber 47
Are sealed from the outside of the detection chamber 46 and the suction port body 11.

The one end 51a of the rotary shaft 51 is supported by a recess 53 formed in the contact portion between the switch case body 44 and the case cover body 49 of the sensor chamber 47, and at the same time, the rotary shaft 51 has The other end portion 51b is rotatably held from above and below by the switch case body 44 and the lower body case 12.

In the vicinity of one end 51a of the rotary shaft 51, a reflection roller 54 which constitutes a rotary member as a substantially cylindrical rotary means is fitted and fixed and is housed in the sensor chamber 47. In the vicinity of the other end portion 51b of the rotating shaft 51, a substantially cylindrical rotating roller 55 having a diameter larger than that of the reflecting roller 54 is fitted and fixed and disposed in the detection chamber 46.

As shown in FIG. 6, the rotary roller 55 has a suction port main body when the outer peripheral surface 55a contacts the floor surface.
It is driven by the movement of 11 and is rotated in a direction following the advancing direction of the suction port main body 11. This outer peripheral surface 55a slightly projects from the lower surface of the lower main body case 12. The rotating roller 55 has irregularities on its outer peripheral surface so that it can rotate reliably even when the floor surface is a tatami mat or the like. Further, the rotary roller 55 is attached in a state of being eccentric by 0.1 to 0.3 mm from the central axis of the rotary roller 55.

As shown in FIG. 6, two annular detection surfaces 54a and 54b are formed along the axial direction on the outer peripheral surface of the reflection roller 54 housed in the sensor chamber 47. The detection surfaces 54a and 54b are displaced from each other by 90 ° in the circumferential direction, and have white reflection surfaces 54a1 and 54a1 with high light ray reflectance, respectively.
54b1 and black non-reflecting surface 54a2, 54b2 with low light ray reflectance
And are formed over 180 ° in the circumferential direction.
In addition, the reflecting surface 54a of each detecting surface 54a, 54b of the reflecting roller 54
1, 54b1 are insert-molded with ABS resin, which is a resin made of acrylonitrile, butadiene, and styrene, and non-reflective surfaces 54a2, 54b2 are insert-molded with polycarbonate.

Further, in the switch case body 44, two pairs of mating grooves 56, 57 facing each other facing the sensor chamber 47 and having the vertical direction as the longitudinal direction are formed substantially parallel to each other. The mounting substrate 58 is fitted and fixed in the fitting grooves 56, 56 on the inner wall side of the device in a state of facing the reflection roller 54. The one surface of the mounting substrate 58 facing the inside of the sensor chamber 47 faces the respective detection surfaces 54a and 54b of the reflection roller 54 with a gap therebetween, and is a non-contact type sensor 59 that is a photo sensor. Sensors 59a and 59b are attached.

The fitting grooves 57, 57 are located in the gap between the reflection roller 54 and the photosensors 59a, 59b, and along the tangential direction of the position where the photosensors 59a, 59b face the reflection roller 54. Formed in the fitting grooves 57, 57 is a plate-shaped shield 60 as an intermediate gray-colored gray shielding member that slides in the vertical direction without contacting the reflection roller 54 and the photosensors 59a, 59b. It is movably fitted.

The shield 60 is shown in FIGS.
As shown in FIG. 5, the reflecting roller 54 is formed in a plate shape from ABS resin, and is positioned downward, that is, on the case cover body 49 side when the suction port body 11 is supported on the surface to be cleaned.
When the suction port body 11 is turned over so that the bottom surface faces upward without blocking the detection surfaces 54a and 54b and the photosensors 59a and 59b from above, that is, the switch case body 44
It is provided so as to move to the side and block between the detection surfaces 54a and 54b of the reflection roller 54 and the photosensors 59a and 59b.

On the other side of the mounting substrate 58, a connector is
61 is attached to the connector 61. A ground wire 62, a plurality of signal wires 63 and 64, and a DC power supply 10V
The power line 65 of is connected. And this ground wire 62
Is connected to the bearing 52 and each circuit board 43 of the control means 42, and is also connected to the ground line. The signal lines 63 and 64 are connected to the photo sensor 59a,
59b is connected to each circuit board 43 of the control means 42.

By the way, when the reflection roller 54 is stopped while the vicinity of the boundary between the reflection surfaces 54a1 and 54b1 and the non-reflection surfaces 54a2 and 54b2 of the reflection roller 54 faces the photosensors 59a and 59b, In order to prevent the photo sensors 59a and 59b from malfunctioning, the lightening portion 55 is provided inside the reflection roller 54.
b is formed, and the lightening portion 55b is located above and the reflection roller 54 is stopped. Further, the lightening portion 55b may be filled with a heavy substance such as lead or iron so that the lightening portion 55b side is always located below, or a rotary roller having a large moment may be provided.

Further, the circuit configuration of the control means 42 and the like will be described with reference to FIG.

The commercial AC power source E is a full-wave rectifier circuit 72 such as a diode bridge via an outlet and a plug 71.
Of the full-wave rectifier circuit 72, and a smoothing capacitor C1 is connected to the output terminal of the full-wave rectifier circuit 72.

Also, in parallel with this capacitor C1,
A series circuit of a resistor R1, a collector and an emitter of the transistor Q1, a diode D1, a drain and a source of the field effect transistor Q2 and a resistor R2 is connected, and a freewheeling diode D2 is connected between the collector and the emitter of the transistor Q1. There is. The collector and emitter of the transistor Q1, the diode D1, and the drain and source of the field effect transistor Q2 are connected in parallel to the collector and emitter of the transistor Q3, the diode D3, and the field effect transistor Q4.
A series circuit of drain and source is connected, and a freewheeling diode is connected between the collector and emitter of transistor Q3.
D4 is connected.

An electric motor 31 is connected between the emitter of the transistor Q1 and the diode D1 and the emitter of the transistor Q3 and the diode D3.
A voltage regulator ZD1 for protecting the electric motor 31 from an overvoltage and a capacitor C2 for noise prevention are connected in parallel to the.

The emitter and collector of the transistor Q5, the resistor R3 and the diode D5 are connected between the positive side of the full-wave rectifier circuit 72 and the drain of the field effect transistor Q2, and the connection point of the resistor R3 and the diode D5 is connected. The base of transistor Q1 is connected to
A resistor R4 and a diode D6 are connected between the base and the emitter of the. Furthermore, the base of the transistor Q5 is
It is connected to the positive electrode of the full-wave rectifier circuit 72 via the resistor R5 and is connected to the drain of the field effect transistor Q4 via the resistor R6.

Similarly, a transistor Q6 is provided between the positive side of the full-wave rectifier circuit 72 and the drain of the field effect transistor Q4.
The emitter, collector, resistor R7 and diode D7 are connected, and the base of transistor Q3 is connected to the connection point of resistor R7 and diode D7.
Resistor R8 and diode D8 between the base and emitter of Q3
Are connected. Further, the base of the transistor Q6 is connected to the positive electrode of the full-wave rectifier circuit 72 via the resistor R9, and is connected to the drain of the field effect transistor Q2 via the resistor R10.

The gate of the field effect transistor Q2 is grounded via the resistor R11, and the field effect transistor Q4
The gate of is connected to ground via resistor R12.

On the other hand, the photosensor 59a is constituted by the photocoupling of the light emitting diode LED1 and the phototransistor FTr1, respectively, and the photosensor 59b is constituted by the photocoupling of the light emitting diode LED2 and the phototransistor FTr2, respectively.

The light emitting diode LED1 has a resistor R15.
Is connected, the resistor R16 is connected to the collector of the phototransistor FTr1, the terminal 73 is connected to the phototransistor FTr1, and the emitter is grounded. Similarly, the resistance R17 is connected to the light emitting diode LED2, the resistance R18 is connected to the collector of the phototransistor FTr2, the terminal 73 is connected, and the emitter is grounded.

The collector of the phototransistor FTr1 is connected to the clock terminal of the flip-flop circuit FF1, and the collector of the phototransistor FTr2 is connected to the data terminal of the flip-flop circuit FF2. And
The set terminal and reset terminal of the flip-flop circuit FF1 are grounded, and the non-inverting output terminal is an empty terminal. The set terminal and reset terminal of the flip-flop circuit FF2 are grounded, and the clock terminal is a capacitor.
It is grounded via C2 and the data terminal is grounded via a capacitor C3.

Further, the collector of the phototransistor FTr1 is connected to the inverting input terminal of the operational amplifier OP1 which constitutes a comparator and serves as hysteresis means, and the output terminal of the operational amplifier OP1 is connected to the B terminal of the flip-flop circuit FF3. . Also, this flip-flop circuit
The A terminal of FF3 is grounded, the inverting output terminal is an empty terminal, the non-inverting output terminal is connected to the data terminal, and the time constant circuit of the resistor R21 and the capacitor C4 is connected between the T1 terminal and the T2 terminal. Furthermore, the R terminal has a resistor R22,
The diode D11 and the capacitor C5 are connected.

The non-inverting input terminal of the operational amplifier OP1 is connected to the connection point of the resistors R23 and R24, and the connection point of these resistors R23 and R24 is connected to the output terminal of the operational amplifier OP1 via the resistor R25. A resistor R26 and a capacitor C22 are connected to the output terminal.

Further, the non-inverting output terminal of the flip-flop circuit FF2 has a resistor R27, a resistor R28 and a diode D12.
Is connected to one of the input terminals of the AND circuit AND1 via a diode D13.
The other input terminal of D1 is connected to the non-inverting output terminal of the flip-flop circuit FF1.

The inverting output terminal of the flip-flop circuit FF2 is connected to the input terminal of the inverter circuit INV1 together with the output terminal of the AND circuit AND1 via the resistor R29 and the diode D14. The resistor R29 has a resistor R30 and a diode D1.
5 is connected to the input terminal of the inverter circuit INV2 via the capacitor C8.

Further, the resistor R31 and the diode D16 are connected to the diode D13, and the resistor R32 and the diode D17 are connected to the output terminal of the inverter circuit INV1.
The base of the transistor Q11 is connected to the connection point of the resistor R32 and the diode D17, the collector of the transistor Q11 is connected to the positive output terminal of the full-wave rectifier circuit 72 via the resistor R33, and the emitter is the light emission for display. diode
Grounded via LED3. The connection point between the resistor R31 and the diode D16 is connected to the base of the transistor Q12, and the collector of this transistor Q12 is connected to the resistor R33.
, And the emitter is connected to the light emitting diode LED4 for display.

The resistor R28 has an inverter circuit INV3,
Connected to both input terminals of the AND circuit AND2 via the inverter circuit INV4 and the diode D21.
One input terminal of the AND circuit AND3 is connected to the connection point of V4 and the diode D21. Further, the output terminal of the inverter circuit INV2 is connected to the resistor R35 via the inverter circuit INV5 and the diode D22, and the AND circuit is connected to the connection point of the inverter circuit INV5 and the diode D22.
One of the input terminals of AND3 is connected.

The output terminal of the AND circuit AND3 is connected to the gate of the field effect transistor Q4 via the diode D23, and the output terminal of the AND circuit AND4 is connected to the diode D24.
Is connected to the gate of the field effect transistor Q2 via.

Further, the AND circuit AND3 and the AND circuit AN
The input terminal of D4 is grounded via a resistor R36, grounded via a diode D25, a resistor R37, an inverter circuit INV6 and a resistor R38, and the connection point between the inverter circuit INV6 and a resistor R38 is connected via a resistor R39. Connected to the positive electrode of the full-wave rectifier circuit 72.

Furthermore, AND circuit AND3 and AND circuit
The input terminal of AND4 is diode D26 and thyristor Th1.
Grounded through. The connection point between the diode D26 and the diode D27 is grounded via the resistor R40 and the Zener diode ZD2. And resistor R4
The connection point of 0 and the Zener diode ZD2 is connected to the positive electrode of the full-wave rectifier circuit 72 via the parallel circuit of the resistors R41 and R42, and is also grounded via the capacitor C6.

The output terminal of the inverter circuit INV1 is connected to the input terminal of the AND circuit AND2 via the resistor R43, the capacitor C7 and the diode D31. The output terminal of the AND circuit AND2 has a resistor R44 and a diode D32.
, And is connected to the input terminal of the AND circuit AND4 via the capacitor C8 and the diode D33.

Further, one input terminal of the operational amplifier OP2 forming the comparator is connected to the drains of the field effect transistors Q2 and Q4 via the diode D34, and the other input terminal is connected to the connection point of the resistor R46 and the resistor R47. Has been done. The output terminal of the operational amplifier OP2 is connected to the resistor R4.
Op amp OP3 that similarly configures a comparator via 7, diode D35, capacitor C11 and resistor R51
Connected to one of the input terminals. The resistor R52 and resistor
The connection point of R53 is connected.

Further, the output terminal of the operational amplifier OP3 has a resistor R55, a resistor R56, a resistor R57 and a capacitor C1.
An operational amplifier that similarly configures a comparator via 2.
Connect to one input terminal of OP4. The resistor R57 and resistor R5 are connected to the other input terminal of this operational amplifier OP4.
8 connection points are connected.

Further, the output terminal of the operational amplifier OP4 is connected to the thyristor Th via the resistors R61, R62 and R63.
Connected to the gate of 1.

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

When performing cleaning, the suction port body 11 is connected to a cleaner body (not shown) via a hose and an extension pipe, and the suction port body 11 is moved forward and backward while contacting the floor surface. In this state, by operating the electric blower built into the cleaner body, the dust on the floor surface, the suction port 18 and suction chamber 14 of the suction port body 11, the air passage chamber 15, the communication pipe 21,
Dust is collected in the dust collecting chamber of the cleaner body through the connecting pipe 23, the extension pipe and the hose.

In this state, the traveling direction detecting means 41
Thus, the traveling direction of the suction port main body 11 is detected, and the driving states of the rotary blade 24 and each traveling wheel 26 are controlled.

That is, the outer peripheral surface 55a of the rotating roller 55 comes into contact with the floor surface, and the shield 60 in the sensor chamber 47 of the traveling direction detecting means 41 is located below, that is, on the case cover body 49 side, and the reflecting roller 54 detection surfaces 54a and 54b and photo sensor
59a and 59b are not disconnected. Therefore, when the suction port body 11 is moved on the floor surface, the rotating roller is moved according to the moving direction and speed of the suction port body 11.
55 and the reflection roller 54 rotate, and as shown in FIGS. 9 and 10, the reflection state of the light from each detection surface 54a, 54b changes, and the rotation direction and the number of rotations of the reflection roller 54 are detected. The outputs from the photo sensors 59a and 59b change. Then, the state of the suction port body 11 shown in FIG.
Alternatively, in the reverse state shown in FIG. 10, the control means 42 determines the detected signal and controls the electric motor 31 to rotate in a predetermined direction and rotation speed.

This motor 31 is controlled by the light emitting diode LE.
The light emitted from D1 and the light emitting diode LED2 is reflected by the detection surfaces 54a and 54b, and the light is emitted from the phototransistor.
Received by FTr1 and FTr2. Further, at this time, the phototransistor FTr1 outputs H level when reflected by the reflecting surfaces 54a1 and 54b1 having a high light reflectance, and conversely when reflected by the non-reflecting surfaces 54a2 and 54b2 having a low light reflectance. The phototransistor FTr2 outputs L level. Then, when it is input to the flip-flop circuit FF1 and the flip-flop circuit FF2, for example, when the suction port body 11 is moving forward, the AND circuit AND3 outputs the H level to turn on the field effect transistor Q4, and the field effect transistor Q4 is turned on. Transistor Q4
Turns on the transistor Q5 to turn on the transistor Q5, and the commercial AC power source E turns on the positive pole of the full-wave rectifier circuit 72, the resistor R1, the transistor Q1, the motor 31, the diode D3, the field effect transistor Q4 and the resistor R2. A current flows through the motor to drive the electric motor 31 to rotate in the forward direction.

On the other hand, for example, when the suction port main body 11 is retracted, the AND circuit AND3 becomes L level, the AND circuit AND4 outputs H level, the field effect transistor Q2 is turned off, and then the field effect transistor Q4. Turn on,
When this field effect transistor Q2 is turned on, the transistor
The base current is supplied to Q6, the transistor Q6 is turned on, and the current is supplied from the commercial AC power supply E through the positive electrode of the full-wave rectifier circuit 72, the resistor R1, the transistor Q3, the motor 31, the diode D1, the field effect transistor Q2, and the resistor R2. Flows and drives the electric motor 31 to rotate in the reverse direction.

Further, the rotation of the electric motor 31 causes the rotary blade 24 and each running wheel 26 to rotate via the belt 35, and the rotary blade 24 efficiently scrapes dust from the floor surface while the suction port main body 11 moves to the floor. Self-propelled or driving assistance on the surface.

Further, when the suction port body 11 is stopped due to the interruption of cleaning and the rotation of the rotating roller 55 is stopped,
As shown in FIG. 11, the outputs from the photosensors 59a and 59b do not change, and in this state, the control means 42 stops the electric motor 31 after a certain period of time has elapsed.

When the suction inlet main body 11 is turned upside down so that the bottom surface faces upward, the shield 60 in the sensor chamber 47 of the traveling direction detecting means 41 is upward, that is, the switch case body.
It moves to the 44 side by its own weight, and each detection surface 54a of the reflection roller 54
, 54b and the photosensors 59a, 59b are cut off. Therefore, even if the rotating roller 55 rotates due to inertia, the shield 60 blocks the reflection of light to the photosensors 59a and 59b, and as shown in FIG.
The outputs from a and 59b are between the H level and the L level, and the control means 42 stops the electric motor 31.

FIG. 12 shows the case where the shield 60 operates.
Will be described with reference to.

That is, as shown in FIG. 12A, when the output of the operational amplifier OP1 is at the H level, the operational amplifier
The input characteristic of the operational amplifier OP1 has a hysteresis characteristic so that OP1 becomes the high-side reference voltage SH, and when the output of the operational amplifier OP1 is at the L level, the operational amplifier OP1 becomes the low-side reference voltage SL. . Therefore, when the output from the operational amplifier OP1 is at the L level and the output from the photosensor 59a does not exceed the reference voltage SL, when the output from the operational amplifier OP1 is at the H level, the output from the photosensor 59a is Unless it becomes lower than the reference voltage SH, the output from the operational amplifier OP1 does not change as shown in FIG.

As described above, if the reference voltage of the operational amplifier OP1 has a hysteresis and the output from the photosensor 59a does not change more than the output when the shield 60 set to the intermediate value does not change the output of the operational amplifier OP1. Does not change, so even if the rotation roller 55 rotates when the suction port body 11 is turned over or returned to its original position, the motor
You can prevent the malfunction that 31 restarts.

The processing of the output from the photo sensor 59a immediately after the shield 60 has shielded it will be described with reference to FIG.

For example, the shield 60 operates to operate the photo sensor.
When 59a is shielded and a pulse is output as shown in FIG. 13A, the output of the operational amplifier OP1 and the flip-flop circuit FF are output as shown in FIGS. 13B and 13C.
The output of 1 is inverted. Then, FIG. 13 (e) and FIG.
The outputs from the flip-flop circuit FF1 and the diode D14 shown in FIG. 3 (f) correspond to the time constant photosensor 59a set by the flip-flop circuit FF3 shown in FIG. 13 (d).
Is ignored, that is, one signal after the shield 60 is shielded is ignored and the second and subsequent signals are read.

As described above, since the output from the first photosensor 59a is ignored and the second and subsequent signals are read for a predetermined time after the operation of the shield 60, the suction port main body 11 is opened. When you flip it over or put it back in,
Even if the rotation roller 55 rotates, the malfunction of the electric motor 31 restarting can be prevented.

Next, another embodiment will be described with reference to FIGS. 14 and 15.

The embodiment shown in FIGS. 14 and 15 is
In the vicinity of the photosensors 59a and 59b, for example, conductive pins 81 and 82 as contact terminals corresponding to the power source side and the ground side of the photosensors 59a and 59b are erected, and the shield 60
Is made of a conductive material, and the shield 60 is used as the photo sensor 59a, 59b.
If there is a shield between the detection surface 54a and 54b, the conductive pin 8
The first and the second 82 are short-circuited by a shield 60, and the shield 60 stops the output from the photosensors 59a and 59b when the shield is shielded.

In this way, the shield 60 is used as the photo sensor 59a.
, 59b and the detection surfaces 54a, 54b are shielded, the output from the photosensors 59a, 59b is stopped as shown in FIG. 11, so that the suction port main body 11 is turned over or returned. Moreover, even if the rotary roller 55 rotates, the malfunction of the electric motor 31 restarting can be prevented.

According to the above construction, the detection chamber 54 of the traveling direction detecting means 41 has the detecting surface 54a of the reflecting roller 54 rotating together with the rotating roller 55 rotating according to the movement of the suction port body 11.
, 54b and the photosensors 59a, 59b facing the detection surfaces 54a, 54b with a gap therebetween, a shield 60 that slides and moves by its own weight is provided. Using the rotating roller 55 and the reflecting roller 54 that do not cause damage due to friction with the surface to be cleaned,
When the bottom surface of the suction port main body 11 is turned over so that it faces the upper surface, the shield 60 slides between the detection surfaces 54a and 54b and the photosensors 59a and 59b by its own weight, and the detection surfaces 54a and 54b.
Block the reflection of light from the photosensors 59a, 59b,
It is possible to promptly and surely perform control to stop driving of the electric motor 31 that rotates the traveling wheel 26 and the rotating blade 24. Further, it is not necessary to provide a separate detecting means, and only by providing the shield 60 that slides and moves by its own weight, it is possible to form a simple structure, easily reduce the size and weight, and reduce the manufacturing cost and improve the manufacturability. can do.

In the above embodiment, the photosensors 59a and 59b and the reflection roller 54 are used as the non-contact type sensor and the rotating member of the traveling direction detecting means 41.
In addition, the same effect can be obtained by using magnetism instead of light by using a magnetic sensor using a photo interrupter or a Hall element.

Further, the invention is not limited to the canister-type vacuum cleaner, but can be applied to an upright type or a self-propelled type in which the suction port body 11 is directly formed on the lower surface of the cleaner body.

The same effect can be obtained by using a rotating brush instead of the rotating blade 24 as the rotating body.

[0081]

According to the suction port body of the vacuum cleaner of the first aspect, when the traveling direction detecting means is driven by the rotating means following the movement of the main body, the contact type sensor does not contact the detecting surface of the rotating means. When the suction port of the main body is directed upward, the detection surface and the sensor are shielded by the shielding means, and the control means outputs the first signal output after the shielding means shields the detection surface and the sensor. Is ignored, it is possible to prevent the rotating body from malfunctioning even when an erroneous signal is output by the shielding unit when the shielding unit moves to shield the detection surface and the sensor from each other, which is safe.

According to the suction port body of the electric vacuum cleaner of claim 2, when the rotating means of the traveling direction detecting means is driven by the movement of the main body, the contact type sensor does not contact the two detecting surfaces of the rotating means. Depending on the state, it outputs signals with different values,
When the suction port of the main body is directed upward and the detection means and the sensor are shielded by the shielding means, the sensor outputs a signal having an intermediate value of different signals, and the control means has a hysteresis characteristic. An erroneous signal is not output when the detection surface and the sensor are shielded, and the rotating body can be prevented from malfunctioning, which is safe.

According to the suction inlet of the vacuum cleaner of the third aspect, when the traveling direction detecting means is driven by the rotating means following the movement of the main body, the contact type sensor keeps the detecting surface of the rotating means in a non-contact state. When the suction port of the main body is detected and directed upward, the detection surface and the sensor are shielded by the shielding means, and the shielding means is short-circuited between the pair of contact terminals to which a signal is transmitted. It is a safe and reliable stop.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a plan view with the lid of the suction port main body removed.

FIG. 3 is a bottom view in which a part of the suction inlet main body is cut away.

FIG. 4 is a partially enlarged view showing the vicinity of the traveling direction detecting means in an enlarged manner.

FIG. 5 is an exploded perspective view showing a traveling direction detecting unit of the above.

FIG. 6 is a perspective view showing a rotating roller and a reflecting roller connected to each other.

FIG. 7 is a perspective view showing a disposition state of a reflection roller, a photo sensor, and a shielding body.

FIG. 8 is a side view of the same.

FIG. 9 is a timing chart of the detection state of reflected light of the photosensor when the suction port body is moving forward.

FIG. 10 is a timing chart of the detection state of reflected light of the photo sensor when the suction port is retracted.

FIG. 11 is a timing chart of the detection state of reflected light of the photo sensor when the suction port body is stopped and when a short circuit occurs.

FIG. 12 is a timing chart showing the operation of the suction port body of the above. (A) Photosensor 59a output waveform (b) Opamp OP1 output waveform (a1) Photosensor 59a output expanded waveform (b1) Opamp OP1 output expanded waveform

FIG. 13 is a timing chart showing the operation of the suction port body of the above. (A) Output waveform of the shield 60 (b) Output waveform of the photo sensor 59a (c) Output waveform of the operational amplifier OP1 (d) Output waveform of the non-inverting output terminal of the flip-flop circuit FF3 (e) Non-output of the flip-flop circuit FF1 Output waveform of inverting output terminal (f) Output waveform of diode D14

FIG. 14 is a perspective view showing a disposition state of a reflection roller, a photosensor, and a shield of another embodiment of the same.

FIG. 15 is a side view of the same.

[Explanation of symbols]

 11 Suction port main body 18 Suction port 24 Rotating blade as a rotating body 31 Electric motor 41 Traveling direction detecting means 42 Control means 54 Reflecting rollers as rotating means 54a, 54b Detection surface 59 Photo sensor 60 Shielding body as shielding means 81, 82 Contact Conductive pin as terminal

Claims (3)

[Claims] 1. A main body having a suction port which opens facing a surface to be cleaned, a forward / reverse rotatable electric motor arranged in the main body, a rotating body rotated by the electric motor, and a main body of the main body. In a suction port body of an electric vacuum cleaner comprising a traveling direction detecting means for detecting a traveling direction and a control means for controlling driving of the electric motor based on the direction detected by the traveling direction detecting means, the traveling direction detecting means Is a rotating means that is formed with a plurality of detection surfaces along the circumferential direction and is driven by the movement of the main body, and a pulse signal that detects the detection surfaces in a non-contact state provided in the rotating means with a gap. A non-contact type sensor that outputs, and a shielding unit that is provided between the detection surface of the rotation unit and the sensor and shields the detection surface and the sensor when the suction port of the main body is directed upward, Serial control means, the suction port of the vacuum cleaner, characterized in that first signal from the sensor after the shielding means has shielding between the detection surface and the sensor are ignored. 2. A main body having a suction port that opens facing the surface to be cleaned, a forward / reverse rotatable electric motor disposed in the main body, a rotating body rotated by the electric motor, and a main body of the main body. In a suction port body of an electric vacuum cleaner comprising a traveling direction detecting means for detecting a traveling direction and a control means for controlling driving of the electric motor based on the direction detected by the traveling direction detecting means, the traveling direction detecting means Is a rotating means that is formed with two kinds of detecting surfaces along the circumferential direction and is driven by the movement of the main body, and a different value by detecting the detecting surface in a non-contact state provided in the rotating means with a gap. A non-contact type sensor that outputs a signal of, and a shielding unit that is provided between the detection surface of the rotation unit and the sensor and shields the detection surface and the sensor when the suction port of the main body is directed upward. The sensor outputs a signal having an intermediate value of the different signals when the shielding means shields between the detection surface and this sensor, and the control means has a hysteresis characteristic with respect to an input from the sensor. A suction port body for an electric vacuum cleaner, comprising: 3. A main body having a suction port that opens facing the surface to be cleaned, a forward / reverse rotatable electric motor disposed in the main body, a rotating body rotated by the electric motor, and a main body of the main body. In a suction port body of an electric vacuum cleaner comprising a traveling direction detecting means for detecting a traveling direction and a control means for controlling driving of the electric motor based on the direction detected by the traveling direction detecting means, the traveling direction detecting means The rotating means is provided with a plurality of detection surfaces along the circumferential direction and is driven by the movement of the main body, and a non-contact type sensor provided in the rotating means with a gap therebetween to detect the detection surfaces in a non-contact state. And a pair of contact terminals for transmitting a signal, and between the detection surface of the rotating means and the sensor, and when the suction port of the main body is directed upward, the detection surface and the sensor are shielded from each other. Suction port body of the electric vacuum cleaner, characterized by comprising a shielding means having a conductive shorting between serial contact terminals.