JP2009267896A - Remote control apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote control apparatus which attains reduction in standby power without damaging user friendliness. <P>SOLUTION: A power supply start signal 67 and a remote control code 66 transmitted from a remote controller 6 are received by a photodiode PD and inputted to a CR low-pass filter LPF. The CR low-pass filter LPF filters the power supply start signal 67 and the remote control code 66 without external power. A comparator U1 is in an electrified state normally, compares an output voltage of the CR low-pass filter LPF with a threshold 69, and outputs a pulse signal 70 when the output voltage is equal to or higher than the threshold 69. When the pulse signal 70 is outputted from the comparator U1, a transistor Q1 is turned on, and power is supplied to a microcomputer 51. Thus, a power-on state is provided and the microcomputer 51 changes over a switch of a switching circuit SW1 and performs control, corresponding to the remote control code 66 received by the photodiode PD, upon respective parts of a power unit 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a remote control device for remotely operating a device such as a clothes drying device with a remote controller.

2. Description of the Related Art In recent years, remote control devices generally composed of devices such as air conditioners and TV devices used at home and remote controllers (hereinafter referred to as “remote controllers”) for remotely operating the devices are generally widely used. It is popular.
In this remote control device, when a user operates a key on the remote controller, the remote controller transmits a remote control code corresponding to the operated key by infrared rays or the like. On the other hand, the device that receives the remote control code monitors whether the remote control code is input from the remote control to a light receiving element such as a photodiode. When the remote control code is input, the receiving device analyzes the remote control code and performs control according to the remote control code.

Therefore, it is necessary for the receiving device to wait by driving a microcomputer or the like that monitors and analyzes the transmitted remote control code.
Note that Patent Documents 1 and 2 propose a remote control system that turns on the power of the apparatus main body using an induced electromotive force generated when a user brings the remote control close to the device.
JP-A-2005-73101 JP 2000-92754 A

However, in the above-described conventional remote control device, the receiving device must always stand by by supplying power to a microcomputer or the like in order to monitor the arrival of a remote control signal. The power consumed even when the device is not operated is called standby power, which is always a small amount compared with the power required for the normal operation state. In order to reduce the power consumption, a device for setting the sleep mode by lowering the clock of the microcomputer has been devised, but even in that case, the amount of power consumption in the year cannot be ignored.
Therefore, the conventional remote control device is not very preferable from the viewpoint of power saving.
Moreover, although the induced electromotive force is used in Patent Document 1, it is necessary to bring the remote control closer to the device, which is inconvenient for the user.

  The present invention is intended to solve such a conventional problem, and an object thereof is to provide a remote control device that reduces standby power without impairing user-friendliness.

  The remote control device of the present invention has the following configuration in order to solve the above problems.

(1) A power activation signal for turning on the power of the apparatus main body, which is a power activation signal for maintaining a constant potential for a predetermined time, is added to the remote control code corresponding to the operated key, and the power activation is performed. A remote control for transmitting a signal and the remote control code;
A light receiving element that receives the power activation signal and the remote control code transmitted from the remote control;
A CR low-pass filter connected to the light receiving element;
A comparator that outputs a pulse signal when the output voltage of the CR low-pass filter is compared with a predetermined threshold voltage and the output voltage is equal to or higher than the threshold voltage;
When the pulse signal is output from the comparator, the power source of the apparatus body is turned on, and a power management unit that starts supplying power to each part of the apparatus body other than the comparator, and
The power management unit controls each part of the apparatus main body according to the remote control code received by the light receiving element when the power is turned on.

  In this configuration, the power state of the device on the receiving side takes either a standby state or a power-on state. In the standby state, power is supplied to the comparator. In the power-on state, power is also supplied to each part of the apparatus main body other than the comparator.

First, when the user operates a key on the remote control in the standby state, the remote control adds a power activation signal to the remote control code corresponding to the operated key. Then, the remote control transmits a power activation signal and a remote control code by infrared rays or the like. The power activation signal and the remote control code transmitted from the remote controller are received by a light receiving element such as a photodiode and input to the CR low pass filter. Since the CR low-pass filter is a filter that includes passive elements and does not require driving power, the power activation signal and the remote control code are filtered without external power. Since the CR low-pass filter performs signal integration processing, the power activation signal whose constant level continues for a predetermined time has a dull signal waveform, and the remote control code has a broken signal waveform. The comparator compares the input signal with the threshold value.For the power activation signal whose signal waveform is dull, it outputs a pulse signal for the signal component exceeding the threshold value, and for the remote control code whose signal waveform is broken, No pulse signal is output because there are no more components exceeding the threshold. That is, the CR low-pass filter detects only the power activation signal component without supplying external power.
Further, since the comparator is an active element, it is necessary to always supply external power. However, since the comparator only compares the input signal and the threshold value, the power consumption is very small.
When a pulse signal is output from the comparator, the power management unit turns on the power of the apparatus main body. As a result, the supply of power to each part of the apparatus main body other than the comparator is started. Thereafter, the power management unit in the power-on state controls each part of the apparatus main body according to the remote control code received by the light receiving element.
Note that since the power activation signal and the remote control code are repeatedly transmitted from the remote control, the remote control code is received from the second and subsequent cycles. At this time, the remote control code is supplied to the power management unit without passing through the CR low-pass filter.

  By adopting the above configuration and managing power, it is only necessary to supply power to the comparator during standby. Therefore, standby power can be reduced as compared with a conventional remote control device that supplies power to a microcomputer or the like during standby. Further, the user only has to operate the keys of the remote controller, and it is not necessary to bring the remote controller close to the receiving device, so that the user's convenience is not impaired.

(2) a holding unit for holding a clothesline;
The remote control device according to claim 1, further comprising: an electric motor that displaces a holding position of the laundry basket held by the holding unit, and installed on a ceiling.
When the pulse signal is output from the comparator, the power management unit turns on the power of the apparatus main body and starts supplying power to each part of the apparatus main body including the electric motor.

(3) Provided with a switching element for switching on and off of the electric circuit connecting the light receiving element and the power management unit,
The power management unit
When the pulse signal is output from the comparator, the switching element is turned on,
When the power is turned on, control is performed on each part of the apparatus main body according to the remote control code received by the light receiving element and input to the power management unit.

  In this configuration, when the electric circuit is turned off, a signal received by a light receiving element such as a photodiode is input to the comparator via the CR low-pass filter. When the electric circuit is turned on, a signal received by the photodiode is input to the power management unit. The switching element is preferably composed of a MOSFET as a gate voltage control element in order to reduce power consumption.

(4) The power management unit performs control according to the remote control code received by the light receiving element, and then turns off the power of each part of the apparatus main body other than the comparator.

  With this configuration, the receiving device automatically enters the standby state again, so that the user does not need to enter the standby state by a specific remote control operation or the like. Accordingly, it is possible to reduce power consumption without impairing user convenience.

(5) a storage unit for storing a plurality of types of remote control codes;
When the remote control code is received by the light receiving element, the power management unit determines whether or not a match with the received remote control code is stored in the storage unit, and a match is stored in the storage unit. If not, the power supply of each part of the apparatus main body other than the comparator is turned off.

  If it is operated based on an illegal code, the user will misunderstand that the remote control device is defective. Moreover, it leads to useless power consumption. Therefore, in this configuration, it is confirmed whether or not the input remote control code is an illegal code. If it is determined that the code is invalid, the power management unit returns to the standby state. Therefore, malfunction of the remote control device can be prevented.

(6) A power supply source to each part of the apparatus main body including the comparator is a primary battery.

(7) The power supply source to each part of the apparatus main body including the comparator is a secondary battery,
A charging circuit that steps down a power supply voltage supplied from a commercial power source with a transformer and charges the secondary battery;
A switching circuit for turning on and off an alternating current input from the commercial power source to the transformer,
The power management unit
Measuring the voltage of the secondary battery,
While the voltage measured by the measuring unit is a predetermined voltage or more, the switching circuit is turned off to stop charging the storage battery by the charging circuit,
When the voltage measured by the measuring unit becomes less than the predetermined voltage, the switching circuit is turned on and charging of the storage battery by the charging circuit is started.

  According to the present invention, it is possible to make a transition from a standby state with extremely low power consumption to a power-on state simply by performing an operation of sending some command with the remote controller, so that standby power can be reduced without impairing user convenience. be able to.

  Hereinafter, the clothes drying apparatus which is embodiment of this invention is demonstrated.

  FIG. 1 is an external view of a lifting type clothes drying apparatus according to an embodiment of the present invention. The clothes drying apparatus 10 includes a column 1, a hook member 2, a pedestal 3, a support member 4, a power supply unit 5, and a remote controller 6. The clothes drying apparatus 10 receives the remote control code 66 transmitted from the remote controller 6 in the configuration shown in FIG.

  The pedestal 3 is fixed to the ceiling surface of the veranda. The support member 4 is fixed to the pedestal 3. A horizontal groove 31 and an inclined groove 32 are formed in the base 3. The support member 4 is attached to the pedestal 3 with an angle within a predetermined range corresponding to the inclination angle of the ceiling surface via attachment screws 33 and 34 that penetrate the horizontal groove 31 and the inclined groove 32, respectively.

  The support member 4 rotatably supports the upper end portion of the support column 1. The support column 1 is a cylindrical body whose upper and lower surfaces are open. The support column 1 is supported by the support member 4 so that the support column 4 has an upper end portion within a 90-degree angle range between a position where the longitudinal direction of the support column 1 is a vertical direction and a position where the longitudinal direction of the support column 1 is a horizontal direction. It can be rotated freely. Therefore, the lower end portion of the support column 1 moves between a first position that is the farthest from the ceiling surface and a second position that the lower end portion of the support column 1 is closest to the ceiling surface.

  The hook member 2 includes a cylindrical attachment portion 21 at the center, and plate-like portions 22 extend on both sides of the attachment portion 21. The attachment portion 21 is fixed to a lower end portion of the support column 1 via a set screw (not shown) in a state of being externally fitted along the longitudinal direction of the support column 1 from below. As an example, two holes 23 are formed in each of the left and right plate-like portions 22. The laundry basket 100 is inserted into the hole 23. In the state where the longitudinal direction of the support column 1 is the vertical direction and the lower end portion of the support column 1 is in the first position, the hook member 2 is positioned at the lowest position. In this state, the user hangs the laundry on the laundry basket 100 held by the hanging member 2.

  The remote controller 6 is provided with a plurality of keys for receiving a command (command) input from the user, and an LED 62 for transmitting a remote control code 66 corresponding to the operated key by infrared rays. Among the plurality of keys, there are keys 61A and 61B. The key 61A is a key for displacing the lower end portion of the support column 1 in a direction close to the ceiling surface, and the key 61B is used for moving the lower end portion of the support column 1 to the ceiling surface. It is a key to be displaced in a direction away from the key.

  The power supply unit 5 includes a photodiode PD which is an example of a light receiving element that receives the remote control code 66. The power supply unit 5 performs an operation according to the remote control code 66 transmitted from the remote controller 6. For example, the power supply unit 5 rotates the upper end portion of the support column 1 to displace the holding position of the clothesline 100.

With the above configuration, the user operates the keys 61A and 61B of the remote controller 6 to displace the holding position of the clothesline 100.
In this embodiment, the clothes drying apparatus 10 is employed, but other electronic devices such as an air conditioner may be used in the implementation.

FIG. 2 is a circuit block diagram showing a power supply circuit of the clothes drying apparatus according to the embodiment of the present invention. The power supply unit 5 includes a photodiode PD, switching circuits SW1 and SW2, a CR low-pass filter LPF including a capacitor C1 and a resistor R1, resistors R2 to R4, a comparator U1, and a transistor Q1 of an FET element. ing. Further, the power supply unit 5 includes a microcomputer (hereinafter referred to as “microcomputer”) 51 that controls the operation of each part of the power supply unit 5, an electric motor 41 that displaces the holding position of the clothes rack 100, and a memory 53. The circuit 52 and the battery 50 of the primary battery which is a power supply source to each part of the power supply unit 5 are provided.
The microcomputer 51 and the transistor Q1 correspond to the “power management unit” of the present invention. The memory 53 corresponds to a “storage unit” of the present invention.

The microcomputer 51 is supplied with power by an SW1 control terminal for controlling the switching of the switch SW1, a digital input terminal to which a remote control code 66 is input, an SW2 control terminal for controlling the switching of the switch SW2, and 2 And a power supply terminal of the book. The microcomputer 51 and the peripheral circuit 52 are supplied with power from the battery 50 only when the transistor Q1 is turned on, that is, only when the power is turned on. On the other hand, power is always supplied from the battery 50 to the comparator U1. The battery 50 is composed of, for example, a primary battery.
The photodiode PD is covered with an infrared filter that allows only infrared rays to pass therethrough, and prevents malfunction due to external light.
In this embodiment, infrared light is used for transmission / reception of the remote control code 66, but light of other wavelengths may be used in the implementation.

  FIG. 3 is a diagram illustrating a waveform change of a signal transmitted from the remote controller to the power supply unit and passing through each part of the power supply unit. FIG. 3A shows a waveform of a signal transmitted from remote controller 6 to power supply unit 5. 3B is a diagram illustrating a waveform of a signal output from the photodiode PD, and FIG. 3C is a diagram illustrating a waveform of a signal output from the CR low-pass filter LPF. 3 (D) is a diagram illustrating a waveform of a signal output from the output terminal of the comparator U1.

Here, the scene in which the user operates the keys of the remote controller 6 during standby will be described in detail with reference to FIGS. First, as shown in FIG. 3A, the remote controller 6 is a power activation signal 67 for turning on the power supply unit 5 before a remote control code 66 corresponding to the operated key, and for a predetermined time. A power supply activation signal 67 that maintains a constant potential for a period of time is added. Then, the remote controller 6 transmits a power activation signal 67 and a remote control code 66 as a one-cycle signal. The number of transmissions of this one-cycle signal is three times, for example, and an IR code including a power supply activation signal 67 and a remote control code 66 shown in FIG.
In this embodiment, the power activation signal 67 is added before the remote control code 66. However, the power activation signal 67 may be added after the remote control code 66 in the implementation.

  The power activation signal 67 and the remote control code 66 transmitted from the remote controller 6 are received by the photodiode PD. The power activation signal 67 and the remote control code 66 are photoelectrically converted by the photodiode PD and then output to the CR low-pass filter LPF via the switching circuit SW1 (see FIG. 3B).

  Since the CR low-pass filter LPF is a filter composed of passive elements and does not require driving power, the power activation signal 67 and the remote control code 66 are filtered without external power. In the CR low-pass filter LPF, the high frequency component of the signal is cut and integration processing is performed. Therefore, the power activation signal 67 whose constant level continues for a predetermined time is in a dull state, and the remote control code 66 has a corrupted signal waveform. It becomes a state. That is, the CR low-pass filter LPF has a time constant determined so that the power activation signal 67 and the remote control code 66 are filtered into a waveform as shown in FIG. The comparator U1 compares the input signal with the threshold value 69, and for the power supply activation signal 67 whose signal waveform is dull, the pulse signal is output for the signal component exceeding the threshold value 69, and the remote control code whose signal waveform is corrupted For 66, no pulse signal is output because there is no component exceeding the threshold 69. That is, the CR low-pass filter LPF detects only the component of the power supply activation signal 67 without supplying external power.

Further, since the comparator U1 is an active element, it is necessary to always supply external power. However, since the comparator U1 only compares the input signal with the threshold value 69, its power consumption is very small. .
The threshold value 69 is determined by the resistance divided value input to the non-inverting input terminal of the comparator U1. The battery voltage of the battery 50 is divided by the resistors R3 and R4 and input to the non-inverting input terminal of the comparator U1. The threshold 69 is set in advance to a value that can detect the power activation signal 67 when the power activation signal 67 is transmitted. Similarly, the time constant (τ) of the CR low-pass filter LPF and the predetermined time of the power activation signal 67 are set in advance to values that allow the power activation signal 67 to be detected when the power activation signal 67 is transmitted.

As shown in FIG. 3D, when the pulse signal 70 is output from the comparator U1, the transistor Q1 is turned on. Therefore, power is supplied to the microcomputer 51 and the peripheral circuit 52. As a result, the power is turned on, and the supply of power to the respective units of the power supply unit 5 other than the comparator U1 is started. When the power is supplied, the microcomputer 51 turns on the switch of the switching circuit SW2, and supplies the battery voltage to the inverting input terminal of the comparator U1. As a result, the detection operation of the comparator U1 is stopped and the power-on state is maintained. Further, the microcomputer 51 switches the switch of the switching circuit SW1 to the digital input terminal side and inputs the remote control code 66 to the digital input terminal. Thereafter, the microcomputer 51 controls each part of the power supply unit 5 according to the remote control code 66 received by the photodiode PD.
Since remote controller 6 repeatedly transmits power activation signal 67 and remote control code 66, remote control code 66 is received from the second and subsequent cycles. At this time, the remote control code 66 is supplied to the microcomputer 51 without passing through the CR low-pass filter LPF.

By adopting the circuit configuration as described above and managing power, it is only necessary to supply power to the comparator U1 during standby. Since the comparator U1 only compares the threshold value and the output signal of the CR low-pass filter LPF, the power consumption during standby can be made extremely low. Further, the power consumption of the CR low-pass filter LPF during standby is zero.
Accordingly, standby power can be reduced as compared with a conventional remote control device that supplies power to a microcomputer or the like during standby to monitor the arrival of a remote control signal. Further, the user only has to operate the normal command transmission key of the remote controller 6, and does not need to perform a key operation for turning on the power or a special operation. Further, it is not necessary to bring the remote controller 6 close to the power supply unit 5. Therefore, user convenience is not impaired.

  Note that the waveform of the signal of the remote control code 66 that has passed through the low-pass filter LPF in the power-on state changes in the order of FIGS. 3E, 3F, and 3G. FIG. 3E is a diagram showing a waveform of a signal of the remote control code 66 output from the photodiode PD, and FIG. 3F shows a waveform of a signal of the remote control code 66 output from the low pass filter LPF. FIG. 3G is a diagram illustrating a waveform of a signal corresponding to the remote control code 66 output from the output terminal of the comparator U1. In FIG. 3G, since the signal component is canceled, the microcomputer 51 does not malfunction due to the remote control code 66 during standby.

  FIG. 4 is a diagram showing stored contents stored in the memory of the clothes drying apparatus according to the embodiment of the present invention. The memory 53 stores in advance a table 53A in which a plurality of commands and remote control codes corresponding to the commands are associated with each other. The contents of this table 53A are used in FIG. The memory 53 is configured by a flash memory, for example.

  FIG. 5 is a flowchart showing an operation performed by the microcomputer of the clothes drying apparatus according to the embodiment of the present invention. This operation is performed when the pulse signal 70 shown in FIG. 3D is output from the comparator U1 to the transistor Q1.

  First, since the transistor Q1 is turned on when the pulse signal 70 is output, the microcomputer 51 and the peripheral circuit 52 transition from the standby state to the power-on state (S1).

  The microcomputer 51 turns on the switch of the switching circuit SW2 in order to maintain the power-on state (S2). As a result, the battery voltage is supplied to the inverting input terminal of the comparator U1, and the above-described detection operation of the comparator U1 is stopped.

  Further, the microcomputer 51 switches the switch of the switching circuit SW1 to the digital input terminal side (S3). As a result, the IR code including the power activation signal 67 and the remote control code 66 is input to the digital input terminal of the microcomputer 51.

  Then, the microcomputer 51 decodes the input IR code (S4), and determines whether or not a code matching the remote control code 66 received this time is described in the table 53A (S5). In S5, it is confirmed whether or not the inputted remote control code is not an illegal code. This is because if it is operated based on an illegal code, it consumes unnecessary power and the user misunderstands that the clothes drying apparatus 10 is defective.

  If the matching code is described in the table 53A in S5, the microcomputer 51 controls each part of the power supply unit 5 according to the remote control code 66 (S6). Then, after the control is completed, the microcomputer 51 turns off both the switching circuits SW1 and SW2, and turns off the power of each part of the power supply unit 5 other than the comparator U1 (S7). Thereby, since it will be in a standby state again, it will become unnecessary to perform the operation for a user to return to a standby state. Accordingly, it is possible to reduce power consumption without impairing user convenience.

  On the other hand, if it is determined in S5 that the matching code is not described in the table 53A, the microcomputer 51 ignores the current remote control code 66 (S8). Then, the microcomputer 51 turns off both the switching circuits SW1 and SW2, and turns off the power of each part of the power supply unit 5 other than the comparator U1 (S7). Thereby, malfunctioning of the clothes drying apparatus 10 can be prevented.

Here, details of the switching circuit SW1 will be described.
FIG. 6 is a diagram illustrating an example of the switching circuit SW1. The switching circuit SW1 includes a field effect transistor (FET) Q2 and a relay 42 to which a normally closed contact 42B is connected so as to short-circuit the motor 41. The relay 42 includes the normally closed contact 42B and a normally closed contact 42A used to guide the power activation signal 67 and the like to the low-pass filter LPF. The relay 42 includes a coil 42C that opens the normally closed contacts 42A and 42B and switches the connection to the normally open side when the relay is energized.

  During standby, the remote control code 66 and the power activation signal 67 are input to the low-pass filter LPF via the contact 42A. As a result, a pulse signal 70 is output from the comparator U1, and power is supplied to the microcomputer 51 and the peripheral circuit 52. That is, the power is turned on from the standby state.

  Then, the microcomputer 51 turns on the transistor Q2 and drives the relay 42 in S3 of FIG. As a result, the remote control code 66 received by the photodiode PD is input to the microcomputer 51 via the transistor Q2 without being input to the low pass filter LPF.

  When the input remote control code 66 is for displacing the holding position of the hanging basket 100, the microcomputer 51 supplies a drive current to the motor 41 in S6 of FIG.

  When the power is turned off in S7 of FIG. 5, the current supply to the motor 41 and the relay 42 is also stopped. As a result, both the contacts 42A and 42B of the relay 42 return to the state shown in FIG. At this time, the motor 41 is in a short-circuit state, the regenerative brake works, and the motor 41 is braked rapidly.

  Moreover, the following modifications can be employed in the embodiment of the present invention.

(First modification)
FIG. 7 is a circuit block diagram showing a power supply circuit of the clothes drying apparatus according to the first modification of the embodiment of the present invention. The switching circuit SW1 may be replaced with diodes D1 and D2. The diode D1 is disposed in the forward direction between the photodiode PD and the CR low-pass filter LPF. The diode D1 guides the signal received by the photodiode PD to the CR low-pass filter LPF and prevents the charge stored in the capacitor C1 of the CR low-pass filter LPF from flowing backward. The diode D2 is disposed in the forward direction between the photodiode PD and the microcomputer 51, and guides a signal received by the photodiode PD to the microcomputer 51. The microcomputer 51 in the standby state does not accept a signal input to the microcomputer 51 via the diode D2 because power is not supplied.

(Second modification)
FIG. 8 is a circuit block diagram showing a power supply circuit of the clothes drying apparatus according to the second modification of the embodiment of the present invention. The transistor Q3 for turning on and off the power supply of the peripheral circuit 52 may be provided, and in S1 of FIG. 5, the microcomputer 51 and the peripheral circuit 52 may not be turned on at the same time, but only the microcomputer 51 may be turned on.
Only when the codes match in S5, the transistor Q3 is turned on and the peripheral circuit 52 is powered on. On the other hand, if the codes do not match in S5, the microcomputer 51 turns off the power without supplying any power to the peripheral circuit 52. As a result, standby power can be reduced by the amount that power is not supplied to the peripheral circuit 52. Accordingly, standby power can be further reduced.
In this modified example, the transistor Q3 is provided as an example of a switching circuit for turning on and off the power supply of the peripheral circuit 52. In implementation, a transistor other than the transistor Q3 may be used.

(Third Modification)
FIG. 9 is a circuit block diagram showing a power supply circuit of the clothes drying apparatus according to the third modification of the embodiment of the present invention. A battery 150 that is a secondary battery may be adopted as a power supply source to each part of the power supply unit 5, and a charging circuit 151 that charges the battery 150 may be provided. The charging circuit 151 steps down the AC 100V power supply voltage supplied from the commercial power supply AC by the transformer T, smoothes it by the bridge circuit B and the capacitor C2, and converts the DC power supply voltage of about 3 to 6V to the regulator ICU2 and the charge control. A charge voltage is supplied to the battery 150 via the ICU 3.
Furthermore, a switching circuit SW3 for turning on and off an alternating current input to the transformer T from the commercial power supply AC is provided in the front stage of the transformer T. In addition, the microcomputer 51 monitors the battery voltage of the battery 150. Then, the microcomputer 51 turns off the switching circuit SW3 while the measured battery voltage is equal to or higher than the predetermined voltage, and stops charging the battery 150 by the charging circuit 151. The predetermined voltage is, for example, 2.5V. On the other hand, when the measured battery voltage becomes less than the predetermined voltage, the microcomputer 51 turns on the switching circuit SW3 and starts charging the battery 150 by the charging circuit 151.
With the above configuration, charging is performed even when the battery voltage of the battery 150 decreases, so that it is not necessary to replace the battery 150. In addition, since the switching circuit SW3 is provided in front of the transformer T, useless power is not consumed by the transformer T or the like during non-charging.

1 is an external view of a clothes drying apparatus according to an embodiment of the present invention. The circuit block diagram which shows the power supply circuit of the clothes drying apparatus which concerns on embodiment of this invention The figure which shows the waveform change of the signal transmitted from the remote control to the power supply unit and passing through each part of the power supply unit The figure which shows the memory content which the memory of the clothes drying apparatus which concerns on embodiment of this invention memorize | stores. The flowchart which shows the operation | movement which the microcomputer of the clothes drying apparatus concerning embodiment of this invention performs. The figure which shows an example of switching circuit SW1 The circuit block diagram which shows the power supply circuit of the clothes drying apparatus which concerns on the 1st modification of embodiment of this invention The circuit block diagram which shows the power supply circuit of the clothes drying apparatus which concerns on the 2nd modification of embodiment of this invention The circuit block diagram which shows the power supply circuit of the clothes drying apparatus which concerns on the 3rd modification of embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support | pillar 2 ... Suspension member 3 ... Base 4 ... Supporting member 5 ... Power supply unit 6 ... Remote control 21 ... Mounting part 22 ... Plate-like part 23 ... Hole part 31 ... Horizontal groove 32 ... Inclination groove 33, 34 ... Mounting screw 41 ... Electric motor 42 ... Relay 50 ... Battery 51 ... Microcomputer 52 ... Peripheral circuit 53 ... Memory 62 ... LED
66 ... Remote control code 67 ... Power activation signal 70 ... Pulse signal 100 ... 竿 150 ... Battery 151 ... Charging circuit U1 ... Comparator U2 ... Regulator IC
U3 ... Charge control IC

(1) A power activation signal for turning on the power of the apparatus main body, which is a power activation signal for maintaining a constant potential for a predetermined time, is added to the remote control code corresponding to the operated key, and the power activation is performed. A remote control for transmitting a signal and the remote control code as a pulse signal in this order ;
A light receiving element configured to receive a power activation signal transmitted from the remote control and the remote control code, and configured by a photodiode to which a bias voltage is not applied ;
A CR low-pass filter that is directly connected to the light receiving element, is set to a level that exceeds a predetermined threshold for the power activation signal and is set to a time constant that is equal to or less than the threshold for the remote control code ;
In a state that is always energized, the comparison with the threshold voltage the output voltage of the CR low pass filter, when the output voltage is the threshold voltage or more, a comparator for outputting a pulse signal,
When the pulse signal is output from the comparator, the power source of the apparatus body is turned on, and a power management unit that starts supplying power to each part of the apparatus body other than the comparator, and
The power management unit controls each part of the apparatus main body according to the remote control code received by the light receiving element when the power is turned on.

(7) The power supply source to each part of the apparatus main body including the comparator is a secondary battery,
A charging circuit that steps down a power supply voltage supplied from a commercial power source with a transformer and charges the secondary battery;
A switching circuit for turning on and off an alternating current input from the commercial power source to the transformer,
The power management unit
Measuring the voltage of the secondary battery,
While the voltage measured by the measurement unit is equal to or higher than a predetermined voltage, the switching circuit is turned off to stop charging the secondary battery by the charging circuit,
The remote control according to any one of claims 1 to 5, wherein when the voltage measured by the measurement unit becomes less than the predetermined voltage, the switching circuit is turned on to start charging the secondary battery by the charging circuit. apparatus.

The power activation signal 67 and the remote control code 66 transmitted from the remote controller 6 are received by the photodiode PD to which no bias voltage is applied . The power activation signal 67 and the remote control code 66 are photoelectrically converted by the photodiode PD and then output to the CR low-pass filter LPF via the switching circuit SW1 (see FIG. 3B).

(1) A power activation signal for turning on the power of the apparatus main body, which is a power activation signal for maintaining a constant potential for a predetermined time, is added to the remote control code corresponding to the operated key, and the power activation is performed. A remote control for transmitting a signal and the remote control code as a pulse signal in this order;
A light receiving element configured to receive a power activation signal transmitted from the remote control and the remote control code, and configured by a photodiode to which a bias voltage is not applied;
Only the output energy of the light receiving element is applied , the power activation signal is set to a level that exceeds a predetermined threshold, and the remote control code is set to a time constant that is less than or equal to the threshold, and exceeds the threshold CR low-pass filter that outputs only the power activation signal that becomes the level ,
A comparator that outputs a pulse signal when the output voltage of the CR low-pass filter is compared with the threshold voltage and the output voltage is equal to or higher than the threshold voltage;
When waiting until the pulse signal is output from the comparator, power is supplied only to the comparator, and power is not supplied to other parts of the apparatus body, and the pulse signal is output from the comparator. A power management unit that turns on the power of the apparatus main body and starts supplying power to each part of the apparatus main body other than the comparator,
The power management unit controls each part of the apparatus main body according to the remote control code received by the light receiving element when the power is turned on.

Since the CR low-pass filter LPF is a filter composed of passive elements and does not require driving power, the power activation signal 67 and the remote control code 66 are filtered without external power. Further, only the output energy of the photodiode PD is added to the CR low-pass filter LPF (see FIG. 2) . In the CR low-pass filter LPF, the high frequency component of the signal is cut and integration processing is performed. Therefore, the power activation signal 67 whose constant level continues for a predetermined time is in a dull state, and the remote control code 66 has a corrupted signal waveform. It becomes a state. That is, the CR low-pass filter LPF has a time constant determined so that the power activation signal 67 and the remote control code 66 are filtered into a waveform as shown in FIG. The comparator U1 compares the input signal with the threshold value 69, and for the power supply activation signal 67 whose signal waveform is dull, the pulse signal is output for the signal component exceeding the threshold value 69, and the remote control code whose signal waveform is corrupted For 66, no pulse signal is output because there is no component exceeding the threshold 69. That is, the CR low-pass filter LPF detects only the component of the power supply activation signal 67 without supplying external power.

Claims (7)

A power activation signal for turning on the power of the apparatus main body, which is a power activation signal for maintaining a constant potential for a predetermined time, is added to the remote control code corresponding to the operated key, and the power activation signal and the power activation signal A remote control for transmitting a remote control code;
A light receiving element that receives the power activation signal and the remote control code transmitted from the remote control;
A CR low-pass filter connected to the light receiving element;
A comparator that outputs a pulse signal when the output voltage of the CR low-pass filter is compared with a predetermined threshold voltage and the output voltage is equal to or higher than the threshold voltage;
When the pulse signal is output from the comparator, the power source of the apparatus body is turned on, and a power management unit that starts supplying power to each part of the apparatus body other than the comparator, and
The power management unit is a remote control device that controls each part of the apparatus main body according to the remote control code received by the light receiving element when the power is turned on. A holding unit for holding a clothesline;
The remote control device according to claim 1, further comprising: an electric motor that displaces a holding position of the laundry basket held by the holding unit, and installed on a ceiling.
When the pulse signal is output from the comparator, the power management unit turns on the power of the apparatus main body and starts supplying power to each part of the apparatus main body including the electric motor. A switching element for switching on and off of the electric circuit connecting the light receiving element and the power management unit;
The power management unit
When the pulse signal is output from the comparator, the switching element is turned on,
3. The remote control device according to claim 1, wherein when the power is turned on, control is performed on each unit of the device main body according to the remote control code received by the light receiving element and input to the power management unit.   The remote control according to any one of claims 1 to 3, wherein the power management unit turns off the power of each part of the apparatus main body other than the comparator after performing control according to the remote control code received by the light receiving element. Control device. It has a storage unit that stores multiple types of remote control codes,
When the remote control code is received by the light receiving element, the power management unit determines whether or not a match with the received remote control code is stored in the storage unit, and a match is stored in the storage unit. If not, the remote control device according to any one of claims 1 to 4, wherein power of each part of the device main body other than the comparator is turned off.   The remote control device according to claim 1, wherein a power supply source to each part of the apparatus main body including the comparator is a primary battery. The supply source of power to each part of the apparatus main body including the comparator is a secondary battery,
A charging circuit that steps down a power supply voltage supplied from a commercial power source with a transformer and charges the secondary battery;
A switching circuit for turning on and off an alternating current input from the commercial power source to the transformer,
The power management unit
Measuring the voltage of the secondary battery,
While the voltage measured by the measuring unit is a predetermined voltage or more, the switching circuit is turned off to stop charging the storage battery by the charging circuit,
The remote control device according to any one of claims 1 to 5, wherein when the voltage measured by the measurement unit becomes less than the predetermined voltage, the switching circuit is turned on and charging of the storage battery by the charging circuit is started.

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