JPS62286426A - Remote control unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a remote control device, and in particular, a remote control device that is connected to a controlled device by an electric wire, and that is connected to a controlled device by an electric wire. The present invention relates to a remote control device having a control section that generates a control signal and a display section that displays a display corresponding to a control mode of the control section.

(Prior Art) In recent years, the suction power of cleaners used for cleaning floors, etc. has been increasing. If the suction power increases, when cleaning soft and uneven floors such as carpets, the suction port at the tip of the cleaner will stick to the floor, making it difficult to move the suction port smoothly. Become.

Therefore, a cleaner is being considered in which the suction force can be changed using a remote control device (hand switch) installed in the middle of the suction hose.

Such a remote control device is connected to the main body of the cleaner, which is a controlled device, via an electric wire embedded in the suction hose, and can be controlled according to the control mode (strength of suction force, etc.). It has a control section that generates an I signal and a display section that displays a control mode. Further, the control section and the display section receive power supply from the cleaner main body. That is,
When connecting a remote control device and a cleaner main body, the remote control device sends control signals corresponding to multiple control modes to the cleaner main body, and the power supply is switched from the cleaner main body to the remote control device. We need to be able to supply it.

In this case, electric wires for transmitting control signals and electric wires for supplying power are usually provided separately.

However, burying a large number of electric wires inside the suction hose for transmitting control signals and supplying power not only makes manufacturing the suction hose difficult and increases costs, but also poses a problem in terms of nitrogen safety. I don't like it either.

(Problems to be Solved by the Invention) As described above, in the conventional technology, there is a problem in that a large number of N wires are required when connecting a remote control device having a control section and a display section to a controlled device. Ta.

The present invention has been made in view of these problems, and has a control section and a display section, and can transmit control signals to a controlled device and supply 'R power from the controlled device using only two wires. The purpose is to provide a remote control device that can perform

[Structure of the Invention] (Means for Solving Problems) The present invention connects a control section and a display section to a power supply circuit section and a control signal receiving end of a controlled device through two electric wires, and connects these two to the control section. By providing a variable resistor connected between two electric wires and changing the resistance value of the variable resistor for each control mode, a current signal with a different current value for each control mode can be controlled from the control unit. (2) It is designed to be transmitted to the device as a control signal.

(Operation) When the control section is set to a certain control mode, a current having a value corresponding to the control mode flows through the 2' electric wires connecting the remote control device and the controlled device. This current value is detected in the controlled device, and the controlled object in the controlled device is controlled according to the control mode set in the tillll1 section. In addition, the control unit and display unit are connected to the N of the controlled device via the same electric wire through which the control signal is transmitted.
Receives power supply from the AC side or DC side of the source circuit.

<Example> Hereinafter, an example in which the present invention is applied to a remote control device for a cleaner will be described.

Fig. 1 is an electric circuit diagram of a main body of a cleaner which is a remote control device and slave control device according to an embodiment of the present invention, Fig. 2 is a perspective view showing an overview of the entire cleaner, and Fig. 3
The figure is a perspective view showing the external shape of the remote control device.

As shown in Figure 2, the cleaner consists of a cleaner main body 1, a suction hose 2, an extension pipe 3, a suction port 4, and a remote control device M (also called a hand switch) 5 provided on the suction hose 2. .

The cleaner body 1 is provided with a motor 6, a turbine 7, dust filters 8 and 9, and a motor drive circuit 10 (see FIG. 1), and when the turbine 7 is driven by the motor 6,
Dust sucked in from the suction port 4 is introduced into the cleaner main body 1 via the extension pipe 3 and the suction hose 2, and is taken into the dust collection filter 8.9. The dust inlet of the cleaner body 1 has a mechanical connector 11a and an electrical connector 11b.
is provided. Electrical connector 11b is connected to motor drive circuit 10.

On the other hand, the end of the suction hose 2 on the cleaner main body 1 side is also provided with a mechanical connector 12a and an electrical connector 12b that are connected to the mechanical connector 11a and the electrical connector 11b on the cleaner main body 1 side. electrical connector 1
2b are two electric wires 1 buried inside the suction hose 2
3.14 (see FIG. 1) electrically connects to the remote control device 5.

The remote control device 5 has a sliding knob 15
By operating the controller, a control signal corresponding to a predetermined control mode is generated to the motor drive circuit 10, and at the same time, the control mode is displayed by a light emitting diode (LED) 16 provided for each control mode. . The control unit and display unit that constitute the remote control device 5 will be described in detail later.

To explain with reference to FIG. 1, in the motor drive circuit 10, an AC voltage of Nm (Ao 100V>17 colors) is stepped down to an appropriate voltage by a transformer 18, and then rectified by a full-wave rectifier 19 and a capacitor 20.・It is smoothed and becomes a DC voltage.

The differential amplifier 24 uses a reference voltage obtained by dividing this DC voltage and a current detection resistor 2 that detects the current flowing through the wire 13.
1 is rectified and smoothed by a diode 22 and a capacitor 23 to generate a voltage corresponding to the difference between the voltage and the control ll voltage, and is supplied between the base and emitter of a transistor 26 connected in series with the LED 25. A photoconductive element 27 , which together with the LED 25 constitutes a photocoupler, is connected in series with a gate resistor 28 and controls the gate voltage of the triac 29 . The triac 29 controls the drive power supplied to the motor 6 connected to the AC power source 17 by having its conduction angle controlled by the gate voltage.

The electric wires 13 and 14 leading to the remote control device 5 are
It is connected to the AC side of the power supply circuit in the motor drive circuit 1o, that is, to the secondary side of the transformer 18. However, wire 1
The current detection resistor 21, which is a control signal receiving end, is inserted between the transformer 3 and the secondary side of the transformer 18.

The control unit 30 in the remote control device 5 includes a diode 31 whose anode side is connected to the electric wire 13, one end of which is connected to the cathode side of the diode 31, and a third
It is composed of a variable resistor 32 whose resistance value changes according to the operation of the slide knob 15 shown in the figure, and a short-circuit prevention resistor 33 connected between the other end of this variable resistor 32 and the electric wire 14. By changing the resistance value of the variable resistor 32 for each control mode, the value of the current flowing through the electric wire 13 during the positive half cycle period of the AC power supply 17 defined by the diode 31 is changed. That is, the control signal 30 generates a control signal corresponding to each control mode in the form of a current signal.

On the other hand, the display section 40 includes a diode 41 whose anode side is connected to the N line 14, a smoothing capacitor 42 connected between the cathode side of this diode 41 and the electric wire 13,
A current limiting resistor 43 whose one end is connected to the toe of this capacitor 42, an LED 16 corresponding to each II 1 mode (see FIG. 3) whose 7 node side is connected to the other end of this resistor 43, and It is constituted by a changeover switch 44 connected between the cathode side and the electric wire 13.

The selector switch 44 is @II! The LED 16 corresponding to the control mode is selected by operating the knob 15 in the i11 section 3o, that is, by switching in conjunction with a change in the resistance value of the variable resistor 32. Here, the LED 16 is energized during the negative half cycle period of the AC power supply 17 defined by the diode 41.

Next, the operation of this embodiment will be explained. With the cleaner main body 1, suction hose 2, extension pipe 3, and suction port 4 connected, and the AC power supply 17 connected to the cleaner main body 1, slide the knob 15 on the remote control device 5 to clean the Assume that the object is selected (in FIG. 3, "curtain" is selected). The control unit 30 changes the resistance value of the variable resistor 32 in conjunction with the knob 15 to determine the type of cleaning target selected.
That is, a current signal corresponding to the control mode is passed through the electric wires 13 and 14 during the positive half cycle period.

Further, this control mode, that is, the type of object to be cleaned, is recognized by energizing and lighting up the corresponding ED 16 during the negative half cycle period.

When a current corresponding to the control mode flows through 1113.14, the current is detected by the current detection resistor 21, and the voltage across it is converted into a DC voltage by the diode 22f3 and the capacitor 23, and then sent to the differential amplifier 24. By being applied, the output voltage of the differential amplifier 24 changes, and the collector current of the transistor 26, that is, the current of the LED 25 changes. As a result, the resistance value of the photoconductive element 27 changes and the gate voltage of the triac 29 changes, so the conduction angle of the triac 29 changes and the driving power supplied to the motor 17 changes.

Through the above-described operation, the motor 6 is controlled to rotate at the optimal rotation speed depending on the object to be cleaned. Specifically, when the object to be cleaned is relatively flat, such as a "folder", the rotation speed of the motor 6 increases; In the case of the target, lower the rotation speed of the motor 6 and
Make sure that it does not get stuck.

FIG. 4 shows another embodiment of the present invention, in which the MIA from the cleaner main body 1 to the remote control device 5 is connected to the DC side of the power supply circuit in the cleaner main body 1, that is, the output end of the rectifier 19, and the control It is connected to one end of the current detection resistor 21 which is a signal receiving end. In this case, the diodes 31, 41 (see FIG. 1) in the control section 30 and the display section 4° become unnecessary.

In the embodiment shown in FIG. 4, the voltage across the current detection resistor 21 is converted into a digital signal by the A/D converter 51,
It is supplied to the microcomputer 52. FIG. 5 is a flowchart for explaining the processing procedure of the microcomputer 52.

In other words, the microcomputer 52 is connected to the current detection resistor 2.
1, that is, the output value of the A/D converter 51, and set the timer value T corresponding to the output value. This timer value T is a time that specifies the conduction angle of the triac 29, and every half cycle of the AC power supply 17, a pulse signal is output from its output port after a time T from the timing of the zero cross point, and the base of the transistor 26 is - Supply between the emitters to turn on the transistor 26. When the transistor 26 is turned on, the LED 25 is turned on, and the optically driven triac 53, which together with the LED 25 constitutes a photocoupler, is turned on. This turns on the triac 29. This turn-on timing, that is, the conduction angle, is set by the microcomputer 52 on the timer 1! Since it changes depending on the IT, it changes depending on the resistance value of the variable resistor 32 in the control section 3o.

Although the above embodiment describes the case where the present invention is applied to a remote control device in a cleaner, the present invention is not limited to this. Applicable to all remote control devices supplied with

[Effects of the Invention] According to the present invention, the control signal is transmitted from the remote control device to the controlled device in the form of a current signal, so that the electric wire connecting the two can be transmitted regardless of the number of control modes. Only two pieces are enough. Therefore, the cost required to connect the remote control device and the controlled device can be reduced, and electrical safety can be improved, especially when the electric wire is installed near a part that comes into contact with the human body, such as in a cleaner. It is also valid for points.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram of a remote control device and a main body of the cleaner to explain an embodiment in which the present invention is applied to a cleaner, Fig. 2 is a perspective view showing the outline of the entire cleaner, and Fig. 3 is a remote control device and an electric circuit diagram of the cleaner body. FIG. 4 is an electric circuit diagram of a remote control device and cleaner body according to another embodiment of the present invention, and FIG. 5 is a flowchart for explaining the operation of FIG. 4. It is. DESCRIPTION OF SYMBOLS 1... Cleaner main body (controlled device), 2... Suction hose, 4... Suction port, 5... Remote control device, 6... Motor (controlled object), 10...
Motor drive circuit, 13.14... Electric wire, 15... Slide knob, 16... ED, 21... Current detection resistor, 24... Differential amplifier, 30... Control unit, 3
2... Variable resistor, 40... Display section, 44... Changeover switch.

Claims (2)

[Claims] (1) It operates upon receiving power supply from the controlled device, and has a control section that generates a control signal corresponding to a predetermined control mode to be supplied to the controlled device, and a display section that displays the control mode of the control section. In a remote control device,
The control section and the display section are connected to a power supply circuit section and a control signal receiving end of the controlled device through two electric wires, and the control section has a variable resistor connected between these two electric wires. A remote control device characterized in that, by changing the resistance value of the variable resistor for each control mode, a current signal having a different current value for each control mode is generated as the control signal. (2) The remote control device according to claim 1, wherein the control section and the display section receive power supply from the AC side of the power supply circuit section during different half cycle periods.