JPH0726526Y2 - Keyless entry system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a keyless entry system, and more particularly to improvement of a keyless entry system using a solar cell.

(Prior Art) Conventionally, in a keyless entry system, an illuminance sensor such as a CdS cell is specially required in order to automatically turn on or off a lighting fixture such as a gate light or an entrance light. did.

(Problems to be solved by the invention) Therefore, there is a drawback that the number of parts is increased, the cost is increased, and at the same time, the battery is consumed.

(Purpose of the Invention) The present invention has been made to solve such a problem, and is used for controlling the turning on and off of lighting fixtures such as gate lights and entrance lights as well as charging of a storage battery as a power source by a solar battery. The purpose is to provide a keyless entry system that uses it.

(Means for Solving the Problems) In order to achieve the above object, the present invention comprises a signal generating circuit for generating a code code as a locking / unlocking signal and a light emitting element for emitting this signal as infrared light. A transmitter, a light receiving element for converting an infrared light signal from the transmitter into an electric signal, an electric lock for locking and unlocking a door, and a normal code code for determining whether the electric signal is a normal code code signal A control circuit having a circuit for outputting a locking / unlocking signal to the electric lock at the time of a signal and a circuit for turning on and off a gate light or an entrance light provided at an appropriate position in response to a first signal and turning off in response to a second signal A solar cell for charging a storage battery that is a power source, comparing the output voltage of the solar cell with a predetermined reference voltage,
When the output voltage is less than or equal to the predetermined voltage, the first
And a comparator circuit that outputs a signal and outputs the second signal when the output voltage is equal to or higher than the predetermined voltage.

(Operation) From the transmitter, the code generated from the signal generating circuit is emitted as infrared light by the light emitting element. The infrared light signal from the transmitter is received by the light receiving element and converted into an electric signal. The control circuit determines whether the electric signal is a normal code code signal, and outputs a locking / unlocking signal to the electric lock when the code signal is a normal code code signal. On the other hand, the storage battery, which is the power source, is charged by the solar cell. The comparison circuit compares the output voltage of the solar cell with a predetermined reference voltage, and when the output voltage is less than or equal to the predetermined voltage, a first
A signal is output and a second signal is output when the output voltage is equal to or higher than the predetermined voltage. The control circuit turns on a gate light or an entrance light provided at an appropriate place in response to the first signal and turns off the light in response to the second signal.

(Embodiment) Next, the present invention will be described in detail with reference to an embodiment shown in the drawings.

FIG. 1 is a circuit diagram of a keyless entry system. In the figure, reference numeral 1 is a transmitter including a signal generation circuit for generating a code code signal as a locking / unlocking signal and a light emitting element for emitting this signal as infrared light. There is a light receiving element 2 for converting an infrared light signal from the transmitter into an electric signal. An electric lock 3 locks and unlocks a door (not shown). Reference numeral 4 determines whether or not the electric signal is a normal code code signal (code code registered in advance), and outputs a locking / unlocking signal to the electric lock if the code signal is a normal code code signal, and turns on and off the luminaire 9. It is a control circuit that outputs a signal to perform.

Reference numeral 5 is a storage battery as a power source, 6 is a solar cell connected in parallel to the storage battery 5, and 7 is a backflow prevention diode. Reference numeral 8 is a comparison circuit for the solar cell 6, one end of which is connected to the control circuit 4 and the other end of which is connected to the positive side of the solar cell 6, and 9 is connected to the control circuit 4 and a gate light or entrance provided at an appropriate place. Lighting equipment such as lights. FIG. 2 is an output illuminance characteristic diagram of the solar cell.

Next, the operation of this embodiment will be described.

A code code signal which is a locking / unlocking signal is generated from the signal generating circuit of the transmitter 1, the code code signal is emitted as infrared light by the light emitting element, and the infrared light signal from the transmitter 1 is received by the light receiving element 2. After converting into an electric signal, the control circuit 4 judges whether this electric signal is a normal code code signal (code code registered in advance), and if it is a normal code code signal, outputs a locking / unlocking signal to output an electric lock. 3 is driven. Solar cell 6
When the daytime is bright, the storage battery 5, which is a power source, is constantly charged. As the output illuminance characteristic diagram of the solar cell in FIG. 2 shows that the illuminance and the voltage have a proportional relationship when the surroundings become dark in the evening, the output voltage of the solar cell 6 decreases. Comparison circuit 8
Then, the output voltage of the solar cell 6 is compared with a predetermined lighting voltage (reference voltage) of the lighting fixture 9, and the output voltage of the solar cell 6 is less than the lighting voltage, that is, the lighting output range of the lighting equipment of FIG. Then, the comparison circuit 8 outputs a signal for turning on the lighting fixture 9 such as a gate light or an entrance light to the control circuit 4, and the control circuit 4 turns on the lighting fixture 9. Further, when the surroundings become brighter in the morning and the output voltage of the solar cell 6 is equal to or lower than the lighting voltage, that is, when the lighting fixture is turned off in FIG. . Further, when the surroundings become dark such as in the evening, the output voltage of the solar cell 6 decreases, so that it becomes lower than the voltage of the storage battery 5 which is the power source. Is provided.

(Effects of the Invention) As described above, the present invention uses the solar battery for charging the storage battery as the illuminance meter for the gate light or the entrance light. Therefore, the gate light or the entrance light can be turned on or off depending on the brightness of the surroundings. Thus, it is possible to provide an inexpensive keyless entry system that does not require an illuminance sensor such as a CdS cell as in the past. Further, according to the present invention, since it is possible to control lighting and extinguishing of the gate light or the entrance light by following the ambient brightness, it is possible to turn on and off the lights in the normal time such as turning off during the day and turning on at night. Instead, even if the ambient brightness changes for a short time due to a sunset or the like, the lights can be turned on and off by following the change. Therefore, it is possible to turn on / off the light when it is really necessary. Further, in the present invention, since the timer or the like is not used, there is an effect that the configuration is extremely simple.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a keyless entry system according to an embodiment of the present invention, and FIG. 2 is an output characteristic diagram of a solar cell. 1 ... Transmitter, 2 ... Light receiving element, 3 ... Electric lock, 4 ...
Control circuit, 5 ... Storage battery, 6 ... Solar cell, 7 ... Backflow prevention diode, 8 ... Comparison circuit, 9 ... Lighting fixture

Claims (1)

[Scope of utility model registration request] 1. A transmitter comprising a signal generating circuit for generating a code code as a locking / unlocking signal and a light emitting element for emitting this signal as infrared light, and an infrared light signal from this transmitter is converted into an electric signal. A light receiving element for converting, an electric lock for locking and unlocking the door, a circuit for determining whether the electric signal is a normal code code signal and outputting a locking and unlocking signal to the electric lock when the code signal is a normal code code are in place. A control circuit having a circuit for turning on a provided gate light or entrance light in response to a first signal and turning off the light in response to a second signal, a solar cell for charging a storage battery as a power source, and an output of the solar cell Comparing a voltage with a predetermined reference voltage, outputting the first signal when the output voltage is equal to or lower than the predetermined voltage, and outputting the second signal when the output voltage is equal to or higher than the predetermined voltage Equipped with a comparison circuit Keyless entry system consisting of Te.