JPH0823578A - Remote controller - Google Patents

Abstract

PURPOSE:To surely operate the controller without increasing the capacity of a condenser even when the voltage drop of a battery is generated. CONSTITUTION:A transistor 4 is connected to a battery 1. A controller 3 for turning on/off the transistor 4 is connected to the battery 1. The controller 3 is provided with an operating switch 7 for operating the transistor 4. A flood element 6 is provided to output a transmitting signal based on the operation of the transistor 4. A diode 2 is provided to disconnect the controller 3 from the battery 1 when the voltage drop of the battery 1 is generated by the operation of the transistor 4 due to the controller 3 based on the operation of the operating switch 7. A capacitor 8 is provided to supply power to the controller 2 when the diode 2 disconnects the controller 3 from the battery 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device.

[0002]

2. Description of the Related Art A conventional remote control device is shown in FIG.
Shown in A controller 52 is connected to the battery 51. A transistor 53 and a transmission circuit 54, which are connected in series, are connected in parallel to the controller 52. The controller 52 is provided with an operation switch 55. Further, the controller 52 is connected to the transistor 53, and operates for several tens of μsec based on the operation of the operation switch 55.
Pulse signal is output to the transistor 53 to turn on / off the transistor 53. The transmission circuit 54 operates based on the on / off operation of the transistor 53 and outputs a transmission signal.

In order to prevent a voltage drop when the transistor 53 is turned on / off and the transmission circuit 54 is operated,
A capacitor 56 is connected to the battery 51.

[0004]

However, when the transmission circuit 54 operates by turning on the transistor 53, a large current (several hundred mA) flows through the transistor 53.
Therefore, the voltage may be equal to or lower than the operating voltage of the controller 52 depending on the degree of consumption of the battery 51 and the degree of decrease in battery performance at low temperatures. Then, the controller 5
Since the operation of No. 2 is stopped, there is a problem that the transmission signal cannot be normally output from the transmission circuit 54.

As a countermeasure against this, it is conceivable to increase the capacity of the capacitor 56, but there is a problem in that the apparatus becomes larger accordingly. The present invention has been made to solve the above problems, and an object of the present invention is to reliably operate a controller even if a voltage drop occurs in a battery without increasing the capacity of a storage element. Another object of the present invention is to provide a remote control device capable of achieving stable operation of a switching element.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 relates to a switching element connected to a battery and a switching element connected to the battery and operating the switching element. A controller, an operation switch provided in the controller for operating the switching element, a transmission element that outputs a transmission signal based on the operation of the switching element, and a controller that operates the switching element based on the operation of the operation switch. When a battery voltage drop occurs due to operation,
The gist of the invention is to include a separation element that separates the controller from the battery, and a storage element that supplies power to the controller when the separation element separates the controller from the battery.

According to a second aspect of the present invention, a transistor whose collector is grounded to a battery, a controller which is connected to the battery and operates the transistor, and a controller which operates the transistor are provided. And a transmission element that is provided on the collector side of the transistor and outputs a transmission signal based on the operation of the transistor, and the voltage of the battery when the controller operates the transistor based on the operation of the operation switch. The gist of the invention is to include a separation element that separates the controller from the battery when a drop occurs, and a storage element that supplies power to the controller when the separation element disconnects the controller from the battery.

[0008]

According to the first aspect of the present invention, when the operation switch is operated, the controller operates the switching element based on this operation. The transmission element outputs a transmission signal based on the operation of the switching element. Also, when a voltage drop of the battery occurs due to the operation of the switching element,
The separation element separates (separates) the controller from the battery. The storage element supplies power to the controller when the controller is disconnected from the battery by the separation element.

Therefore, even if the voltage drop of the battery occurs due to the operation of the switching element, it is possible to prevent the controller from not operating. Further, since the power storage element only needs to supply power to the controller, the capacity of the power storage element can be reduced.

According to the second aspect of the present invention, when the operation switch is operated, the controller operates the transistor based on this operation. The transmission element provided on the collector side of the transistor outputs a transmission signal based on the operation of the transistor. Further, when the voltage drop of the battery occurs due to the operation of the transistor, the separation element separates (separates) the controller from the battery. The storage element supplies power to the controller when the controller is disconnected from the battery by the separation element.

Therefore, even if the voltage drop of the battery occurs due to the operation of the transistor, the controller is prevented from failing to operate. Further, since the power storage element only needs to supply power to the controller, the capacity of the power storage element can be reduced. Further, since the transmitting element is provided on the collector side of the transistor, the current flowing through the emitter can be stabilized. Therefore, the operation of the transistor can be stabilized.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. A diode (in this embodiment, a Schottky diode and a forward voltage drop of 0.3 V) 2 and a controller 3 are connected to a power source 1 having a voltage of 3 V as a separating element. The emitter of a PNP (bipolar) transistor 4 as a switching element is connected to the positive electrode of the power source 1. The collector side of the transistor 4 is connected to the negative electrode of the battery 1 via a current suppressing resistor (2.2Ω in this embodiment) 5 and a light projecting element 6 as a transmitting element that emits infrared rays. The base of the transistor 4 is connected to the controller 3. The controller 3 in this embodiment operates when a voltage of 1.8 V or higher is applied.

The controller 3 is provided with an operation switch 7 for turning on / off the transistor 4. When this operation switch 7 is turned on, the controller 3 turns on the transistor 4 for several μs based on this on operation.
A predetermined pulse signal for turning on / off for each ec is output to the base of the transistor 4. When the transistor 4 performs an on / off operation based on a pulse signal, the light projecting element 6 blinks accordingly and outputs an infrared transmission signal. Further, one end of a capacitor (capacity: 100 μF) 8 as a storage element is connected between the cathode of the diode 2 and the controller 3, and the other end of the capacitor 8 is connected to the negative electrode of the battery 1.

Normally, when the operation switch 7 is not operated (open circuit state), the voltage (3 V) of the battery 1 is applied between the diode 2 and the controller 3.
Therefore, the diode 2 is in a conducting state and the controller 3 is in an operable state. Also, capacitor 8
Is charged with a voltage of about 2.7V after subtracting the voltage drop (0.3V) of the diode 2.

In this state, when the operation switch 7 is turned on (closed), the controller 2 outputs a predetermined pulse signal to the base of the transistor 4 based on this on operation. Then, when the transistor 4 is turned on based on the pulse signal, a current of several hundred mA flows through the emitter. This current flows through the light projecting element 6 via the resistor 5.
Therefore, the light projecting element 6 outputs an infrared transmission signal.
When the transistor 4 turns on, a voltage drop occurs on the emitter side. Then, since the anode voltage of the diode 2 becomes lower than the cathode voltage of the diode 2 to which the voltage of the capacitor 8 is applied, the diode 2 becomes non-conductive. Therefore, the controller 3 is disconnected from the battery 1.

At this time, the voltage from the capacitor 8 is supplied to the controller 3, so that the operation of the controller 3 is prevented from being stopped. When the transistor 4 is turned off by the controller 3, the anode voltage of the diode 2 becomes higher than the cathode voltage, so that the diode 2 becomes conductive again and the voltage of the battery 1 is applied to the controller 3. At this time, the capacitor 8
Is charged by the battery 1.

Since the transistor 4 is on for several tens of microseconds, the diode 2 becomes conductive before the capacitor 8 is discharged. As a result, even if the controller 3 is disconnected from the battery 1 due to the voltage drop due to the ON operation of the transistor 4, the controller 3 can be sufficiently operated by the voltage of the capacitor 8.

Therefore, even if the voltage of the battery 1 temporarily drops due to the ON operation of the transistor 4, the voltage from the capacitor 8 is applied to the controller 3. As a result, it is possible to reliably prevent the operation of the controller 3 from being stopped due to the voltage drop of the battery 1.

Further, when the voltage drops due to the exhaustion of the battery 1, it becomes impossible to secure the operating voltage (1.8 V) of the controller 3 if the voltage drops.
In the present invention, the operating voltage of the controller 3 can be reliably ensured by the capacitor 8. Moreover,
In a bad environment such as at low temperature, the voltage may be low due to the characteristics of the battery 1. Even in this case, the controller 3
Can be operated reliably.

Since the capacitor 8 only needs to supply the voltage to the controller 3, the capacity of the capacitor 8 can be reduced. As a result, it is possible to reduce the size and weight of the remote control device and reduce the cost.

Further, in this embodiment, the PNP transistor 4 is used. This transistor 4 has a low operating resistance during the ON operation, and is the most easily available on the market. As a result, the power consumption of the transistor 4 can be reduced. The transistor 4 is suitable for mass production of remote control devices.

A resistor 5 and a light projecting element 6 are provided on the collector side of the transistor 4. Therefore, when the transistor 4 is turned on, a stable current can be supplied as much as there is no load on the emitter. As a result, the on / off operation of the transistor 4 is stabilized, and the light projecting element 6
The blinking operation of can be stabilized.

In this embodiment, the diode 2 is used as the isolation element, but as shown in FIG. 2, the collector and base of the bipolar transistor 10 are connected to the positive electrode of the battery 1 and the emitter is connected to the controller 3. It is also possible to use it. In this case, the bipolar transistor 10 has the same function as the diode 2, and the same effect as that of the above embodiment can be obtained.

Further, instead of the diode 2, the gate and source of the N-type MOS transistor 11 may be connected to the positive electrode of the battery 1 and the drain thereof may be connected to the controller 3 as shown in FIG. Good. In this case, MO
The S-transistor 11 has the same function as the diode 2, and can obtain the same effect as that of the above-described embodiment.

Although the resistor 5 and the light projecting element 6 are provided on the collector side of the transistor 4, if necessary, the resistor 5 and the light projecting element 6 are provided on the emitter side of the transistor 4 as shown in FIG. It is also possible to provide.

Further, as shown in FIGS. 5 and 6, the transistor 4 may be an NPN (bipolar) transistor. At this time, the resistor 5 and the light projecting element 6 are on the collector side,
It may be provided on either side of the emitter.

Further, as shown in FIG. 7, the diode 2 may be built in the chip of the controller 3. in this case,
The controller 3 is provided with a connection terminal 15 connected to the anode of the diode 2, and the capacitor 8 is connected to the connection terminal 15. Furthermore, the bipolar transistor 10 and the MOS transistor 11 may also be incorporated in the chip of the controller 3. As a result, the number of elements connected to the controller 3 can be reduced, and the remote control device can be made compact and the assembling work can be simplified.

Further, as shown in FIG. 8, a power supply voltage compensating capacitor 16 may be provided for the battery 1. In this case, when the transistor 4 is turned on, the power supply voltage compensating capacitor 16 compensates so that the voltage on the emitter side of the transistor 4 does not drop. Therefore, the amount of infrared light emitted (peak amount) can be stabilized by stabilizing the current flowing through the light projecting element 6. As a result, since the transmission signal output from the light projecting element 6 can be sent to a distant place, the transmission distance can be extended.

In this embodiment, the light projecting element 6 that emits infrared rays is used, but it is also possible to use the light projecting element 6 such as an LED if necessary. Next, technical ideas other than the claims, which are understood from the above-described embodiments, will be described below along with their effects.

(1) As shown in FIG. 8, a power supply voltage compensating capacitor 16 may be connected to the battery 1. If the separating elements 2, 10 and 11 are provided between the controller 3 and the battery 1, the current flowing through the switching element 4 becomes small when the switching element 4 is turned on. Therefore, by connecting the power supply voltage compensating capacitor 16 to the battery 1, it is possible to prevent a voltage drop on the switching element 4 side. As a result, the current flowing through the switching element 4 can be stabilized, and the amount of light emitted from the transmission element 16 can be stabilized.

(2) The separation element according to claims 1 and 2 may be provided inside the controller. If the separating element is provided inside the controller, the number of parts connected to the controller can be reduced accordingly, and the device can be made compact and the assembling work can be facilitated.

[0032]

As described above in detail, in the invention described in claim 1, even if the voltage drop of the battery occurs due to the operation of the switching element, the separation element disconnects the controller and the battery, and the storage element functions as the controller. Since it supplies power,
It is possible to prevent the controller from stopping. Further, since the power storage element only needs to supply power to the controller, it can have a small capacity, and the device can be made compact.

According to the second aspect of the present invention, even if the voltage drop of the battery occurs due to the operation of the transistor, the separation element disconnects the controller and the battery, and the power storage element supplies power to the controller. Therefore, the controller stops. It is possible to prevent that. Further, since the power storage element only needs to supply power to the controller, it can have a small capacity, and the device can be made compact. Furthermore, since the operation of the transistor can be stabilized, the operation of the transmitting element can be stabilized and the transmission signal can be reliably output.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a configuration of a remote control device according to the present invention.

FIG. 2 is an electric circuit diagram showing another example of the separation element.

FIG. 3 is an electric circuit diagram showing another example of the separation element.

FIG. 4 is an explanatory diagram showing another example in which a resistor and a light projecting element are provided on the emitter side of a PNP type transistor.

FIG. 5 is an explanatory diagram showing another example in which a PNP type transistor is changed to an NPN type transistor.

FIG. 6 is an explanatory diagram showing another example in which a resistor and a light projecting element are provided on the collector side of an NPN type transistor.

FIG. 7 is an electric circuit diagram showing another example in which a diode is provided in a controller chip.

FIG. 8 is an electric circuit diagram showing another example in which a power supply voltage compensating capacitor is provided for a battery.

FIG. 9 is an electric circuit diagram showing a conventional remote control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Battery, 2 ... Diode as a separation element, 3 ... Controller, 4 ... PNP type transistor as a switching element, 6 ... Light projecting element as a transmission element, 7 ... Operation switch, 8 ... Capacitor as a storage element, 10 ... Transistor as separation element, 11 ... N as separation element
Type MOS transistor

Claims (2)

[Claims] 1. A switching element connected to a battery, a controller connected to the battery and operating the switching element, and an operation switch provided in the controller for operating the switching element. A transmission element that outputs a transmission signal based on the operation of the switching element; and a separation element that separates the controller from the battery when a voltage drop occurs in the battery due to the controller operating the switching element based on the operation of the operation switch. A remote control device comprising: an element; and a storage element that supplies power to the controller when the separating element disconnects the controller from the battery. 2. A transistor whose collector is grounded to a battery, a controller which is connected to the battery and operates the transistor, and an operation switch which is provided in the controller for operating the transistor. A transmitting element provided on the collector side of the transistor for outputting a transmission signal based on the operation of the transistor; and a voltage drop of the battery caused by the controller operating the transistor based on the operation of the operation switch, A remote control device comprising: a separation element that separates the controller from the battery; and a storage element that supplies power to the controller when the separation element separates the controller from the battery.