JPH0721772Y2 - Remote control signal generation circuit - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a circuit for generating a remote control signal containing a specific code, and more particularly to a remote control signal generation circuit that can be used with either a battery or another power source.

2. Description of the Related Art For example, as disclosed in Japanese Patent Laid-Open No. 62-173354, a key that generates an optical signal including a predetermined code signal and a specific key that generates a coincidence signal when receiving an optical signal emitted from the key Anti-theft devices having code discriminating means are known. This anti-theft device has a picking signal output means, and when it is unlocked without generating the coincidence signal of the specific code discrimination means, it is judged as an illegal unlock and the alarm device is activated. However, if the optical signal emitted from the key is received and unlocked while the coincidence signal is generated from the specific code discriminating means, the alarm device does not operate.

Further, in Japanese Patent Laid-Open No. 62-174476, a key for generating an optical signal containing a predetermined code signal and a specific code for generating a coincidence signal when receiving an optical signal emitted from the key provided in a lock device are disclosed. There is disclosed an electronic control device for a house, an automobile, etc., which has a discriminating means and a controlled portion which is operated by a coincidence signal of the specific code discriminating means. In this electronic control unit, the battery, the switch means, the power supply switching circuit connected to the battery and the switch means, the specific code generating means operated by the output of the power supply switching circuit, and the specific code by the output of the specific code generating means. And a light-emitting element that generates an optical signal. The optical signal emitted from the light emitting element is received by the light receiving element connected to the specific code discriminating means. The specific code determining means sends an output to the controlled unit when the signal received by the light receiving element and the preset code signal match.

Further, as disclosed in Japanese Patent Publication No. 56-11032, there is known a lock device including a lock mechanism that operates a lock portion by electric means and a key mechanism that includes a transmitter. Each of the lock mechanism and the key mechanism is provided with a pulse pattern generator that generates a specific pulse train in synchronization with a clock signal generated by a predetermined number of times from the oscillator of the key mechanism. The lock mechanism and the key mechanism are connected to each other by an optical transmission means, and when the pulse trains of both are time-wise matched, the locking portion of the lock mechanism is unlocked.

As disclosed in Japanese Examined Patent Publication No. 63-11509, there is known a vehicle lock control device having a transmission section independent of the vehicle and a reception section mounted on the vehicle. The transmitter includes a DC power supply, an oscillator that oscillates a message, and a transmitter that remotely transmits the message in series. When the receiving unit compares the power supply device, the receiving device that receives the message, the storage device that stores only one encoded message, and the received message and the message that is stored in the storage device, and the two match. And a comparator for generating one signal. The transmitter of the transmitter has a diode for emitting infrared rays, and the receiver of the receiver has a light receiving diode.

Japanese Unexamined Patent Publication No. 64-52970 discloses a key switch having a first electric circuit, a key having a second electric circuit, and a second electric circuit formed by inserting a key into a key hole of the key switch. A key device having a key switch and contact means provided on the key so as to be electrically connected to the electric circuit of the above. The contact means of this key device comprises a fixed contact portion fixed to the key switch, and a movable contact portion which is retractably received by the key while being spring-biased so as to elastically protrude from the key. When the key of the key device is rotated to the on position or the start position, the fixed contact and the movable contact come into contact with each other to emit an optical signal from the key,
It becomes possible to operate the engine.

Also, Japanese Utility Model Laid-Open No. 64-33135 discloses an electronic key device which is spring-biased so as to freely move in and out of a grip portion and normally covers a contact, and is provided with a protective cover for exposing the contact when a key hole is inserted. Has been done.

Problems to be Solved by the Invention By the way, conventional infrared light emitting devices are classified into two types: a battery built-in type and an external power supply type. The infrared light emitting device with a built-in battery has an advantage that the locking device can be operated by remote control, but has a drawback that the battery needs to be replaced in a short period of time because the infrared light emitting diode consumes a large amount of power. On the other hand, the external electrode supply type infrared light emitting device does not cause inconvenience of battery replacement, but since it is used with the built-in terminal connected to the terminal on the lock device side, there is a drawback that it cannot be operated remotely. Even when a rechargeable battery is used, it has a smaller power capacity than a non-rechargeable battery, and thus it is necessary to perform charging operation frequently.

This invention solves the above-mentioned drawbacks and provides a remote operation signal generation circuit which has a terminal capable of supplying an external power as well as having a built-in battery and which can be used for both a battery built-in type and an external power supply type. The purpose is to

The remote control signal generating circuit according to the present invention comprises a battery having a positive side terminal and a negative side terminal, and first and second inputs connected to the positive side terminal and the negative side terminal of the battery, respectively. A transmission control circuit having a terminal, a trigger circuit connected to the third input terminal of the transmission control circuit, a switch connected between the trigger circuit and the positive terminal of the battery, and an output terminal of the transmission control circuit It has a switching element having a connected control terminal and connected to the output side of the switch, and a remote control signal generating means which is energized when the switching element is turned on. A first diode is connected between the first input terminal of the transmission control circuit and the positive side terminal of the battery, and a power supply is provided via a second diode between the first input terminal and the first diode. The terminals are connected. The power supply terminal is connected to the switching element. Further, a third diode is connected between the switch and the third input terminal of the transmission control circuit.

Action The first diode has an action of preventing voltage application to the battery when power is externally applied through the power supply terminal. It is also desirable to use a Schottky barrier diode to minimize the diode voltage drop during battery operation. Further, the second diode has an action of preventing leakage of electricity from the battery to the outside through the power supply terminal when the battery is used. The third diode has the function of adjusting the level of the voltage applied to the third input terminal of the transmission control circuit when power is externally supplied through the power supply terminal.

When performing remote control, when the switch is turned on with the remote control signal generating means facing the receiver, a trigger signal is applied to the third input terminal of the transmission control circuit through the trigger circuit.
Therefore, an output representing the predetermined code signal is generated from the output terminal of the transmission control circuit. The switching element repeatedly turns on and off in response to this output, and the remote control signal generating means generates a remote control signal including a predetermined code signal.

When the power supply terminal is connected to an external power supply, a trigger signal is applied to the third input terminal of the transmission control circuit through the trigger circuit. Therefore, similarly to when the switch is turned on, an output representing the predetermined code signal is generated from the output terminal of the transmission control circuit. The switching element repeatedly turns on and off in response to this output, and the remote control signal generating means generates a remote control signal including a predetermined code signal.

Embodiment An embodiment in which the present invention is applied to a steering lock device for an automobile will be described below with reference to FIGS. 1 to 14.

First, as shown in FIG. 1, the double lock device 1 includes a transmitting device 3 that generates a remote control signal including a predetermined code signal.
And a key means 2 having a key portion 4, a steering lock device 5 as a mechanical lock device that is unlocked by the key portion 4 of the key means 2, and a remote operation signal generated from a transmitting device 3 of the key means 2. And an electronic lock device 6 which is activated when received.

As shown in FIG. 2, the key means 2 includes a battery 9, a substrate 10 and a light guide member 12 housed in a recess 8 formed in the key head 7.
And a send button 13 and the recess 8 is closed by a key cover 11. The substrate 10 has an extension 10a provided with a fixed contact (power supply terminal) 14. Further, on the substrate 10, a plurality of electronic components 15 constituting the transmitter 3, an infrared light emitter 16 (remote operation signal generating means), a light emitting diode 17 and a switch 18 are provided.
Is provided. A shield 19 having a substantially triangular cross section is provided at the front of the infrared light emitter 16. The shield 19 is made of a material that is opaque but transmits infrared rays. Light guide member 12
As shown in FIG. 5, the visible light emitted from the light emitting diode 17 is formed in the key head 7, and the hole 7a and the key cover are formed.
It is discharged to the outside of the key head 7 through the hole 11a formed in the hole 11. Therefore, the light guide member 12 has a pair of protrusions 12a and 12b that fit into the hole 7a of the key head 7 and the hole 11a of the key cover 11.
Are formed. When the send button 13 is pressed, the switch 18 is turned on. The key portion 4 of the key means 2 is formed with a notch portion 4a (FIG. 1) for giving a key code. A slide member 20 that covers the fixed contacts 14 of the substrate 10 is attached to the key portion 4. The slide member 20 has a substantially Z-shaped through hole 21 into which the key portion 4 is inserted, a pair of recesses 22 formed in parallel with the through hole 21, and an elongated hole 23 formed in the width direction. The ends of the springs 24 that bias the slide member 20 outward are disposed in the pair of recesses 22. Key part 4 in the long hole 23
The pin 25 to be inserted into the through hole 4b formed in
The movement distance of the slide member 20 is limited.

As shown in FIG. 2, a metal terminal 26 having elasticity shown in FIG. 4 is provided between the battery 9 and the substrate 10.
The terminal 26 has a terminal main body 26a that contacts the negative terminal of the battery 9, and an arm portion 26b that extends from the terminal main body 26a and is electrically connected to the key portion 4.

The steering lock device 5 includes a cover 30 having a cam 31, a collar 32 rotatably arranged in the central opening 30a of the cover 30, and a substrate 33 arranged outside the collar 32 in the cover 30. Have. The substrate 33 has a pair of elastic contacts 34 and a pair of infrared receivers 35. A window for infrared transmission at a position corresponding to the infrared receiver 35 of the cover 30
36 is formed. The window 36 is provided with an infrared transparent material.

6 and 8 show a state in which the key portion 4 is inserted into the steering lock device 5 in the lock position. In this state, the fixed contact 14 is at a position angularly separated from the contact 34, and the slide member 20 is at a position to cover the fixed contact 14 as shown in FIG. When the key portion 4 is rotated from the lock position to the start position, the slide member 20 abuts on the cam 31 of the cover 30 as shown in FIGS. 7 and 9, and as shown in FIG. It is moved inward against the elasticity. Further, when the key portion 4 is rotated, the fixed contact 14 comes into contact with the one contact 34, and the infrared ray containing the predetermined code is emitted from the ultraviolet light emitter 16.

FIG. 12 shows a remote control signal generating circuit of the present invention which is built in the key means 2 and generates infrared rays. This infrared light emitting circuit has, for example, a transmission control circuit 80 composed of a one-chip microcomputer. A capacitor 82 is connected in parallel to the battery 9, and the positive terminal of the battery 9 is connected to the first input terminal I ₁ of the transmission control circuit 80 via the first diode 81. The first diode 81 has a function of preventing voltage application to the battery 9 when power is externally applied through the fixed contact 14. It is also desirable to use a Schottky barrier diode to minimize the diode voltage drop during battery operation. Further, the capacitor 83 is connected to the first input terminal I ₁ . The negative terminal of the battery 9 is connected to the third input terminal I ₃ of the transmission control circuit 80 via the switch 18, the third diode 84 and the capacitor 85. The third diode 84 has the function of adjusting the level of the voltage applied to the third input terminal I ₃ of the transmission control circuit 80 when power is supplied from the outside through the fixed contact 14. The negative terminal of the battery 9 and the capacitor 82 are connected to the second input terminal I ₂ . The cathode of the third diode 84 is connected to the second input terminal I ₂ via the resistor 86. Further, a parallel circuit of a resistor 87 and a diode 88 is connected between the second input terminal I ₂ and the third input terminal I ₃ . Input terminal I ₄ and
I ₅ is connected by resistor 89. The capacitor 85 and the resistor 87 form a trigger circuit, and when the switch 18 is turned on or a voltage is applied to the fixed contact 14, the first input terminal I ₁
Give a trigger pulse to.

The output terminal O ₁ of the transmission control circuit 80 is connected to the base (control terminal) of the transistor 91 (switching element) via the resistor 90. The emitter of the transistor 91 is connected to the fixed contact 14 and the switch 18. Further, the fixed contact 14 is connected to the first input terminal I ₁ via the second diode 92. When the battery 9 is used, the second diode 92 has a function of preventing leakage of electric current from the battery 9 to the outside through the fixed contact 14. The collector of the transistor 91 is connected to the infrared light emitter 16 via the resistor 93. The infrared light emitter 16 is a light emitting diode. Further, the light emitting diode 17 and the resistor 94 are connected between the fixed contact 14 and the output terminal O ₂ . Input terminals I _{6 to} I ₈
Is connected to the ROM 95, the output terminal O ₃ is grounded.

In the above configuration, when the switch 18 is turned on during remote operation, a trigger pulse is applied from the battery 9 to the third input terminal I ₃ through the switch 18, the third diode 84 and the capacitor 85. Therefore, a predetermined code pulse is generated from the output terminal O ₁ by the program stored in the ROM 95. Therefore, the transistor 91 is turned on and off, and the infrared light emitter
16 produces an infrared signal. At the same time, input terminal O ₂
Generates a low level signal for a certain period of time, so that the light emitting diode 17 is turned on. Therefore, the operator can
The operation of the infrared light emitter 16 can be recognized by lighting. Also, instead of turning on switch 18, fixed contact
When a voltage is applied to 14, the same operation as above is performed.

When the key portion 4 is inserted into the steering lock device 5,
The circuit shown in FIG. 13 is configured. That is, the transmission control circuit 80
The negative terminal of the battery 9 and the terminal circuit 15, including the infrared ray emitter 16, are connected to the key portion 4, and the key portion 4 is grounded through a conductive metal such as a tumbler (not shown) of the steering lock device 5. Further, the fixed contact 14 is connected to the power supply 96 of the automobile. One end of the drive control circuit 41 is connected to the power supply 96, and the other end is grounded.

FIG. 14 shows a circuit diagram of the electronic lock device 6. The electronic lock device 6 includes a sensor circuit 40, a drive control circuit 41 that receives a signal from the sensor circuit 40, and a lock control circuit 42 that is operated by the output of the drive control circuit 41. The drive control circuit 41 is connected to the ignition switch 37. The sensor circuit 40 is a one-chip IC infrared light receiver 50 (receiver) that is ready to receive light when the ignition switch 37 is turned on, and a drive control circuit that amplifies an infrared signal received by the infrared light receiver 50. It has an amplifier circuit 51 for supplying to 41. The amplifier circuit 51 has two transistors 52 and 53. The positive side line 54 of the sensor circuit 40 is connected to the output port O ₁ of the drive control circuit 41, and the negative side line 55 of the sensor circuit 40 is grounded. Smoothing capacitors 56 and 57 are connected in parallel to the positive line 54 and the negative line 55. Further, the positive side line 54 is connected to the output port O ₂ of the drive control circuit 41 via the display light emitting diode 58 and the resistor 59.

The emitter of the transistor 52 is connected to the positive side line 54, the base is connected to the infrared receiver 50, and the collector is connected to the base of the transistor 53. The emitter and the collector of the transistor 53 are connected to the input port I ₁ of the drive control circuit 41 through the diode 60 and the base of the transistor 62 through the diode 61. Transistor 62
The emitter is connected to the power supply and the collector is the reset circuit
It is connected to the input port I ₅ of the drive control circuit 41 via 63. The reset circuit 63 includes a resistor 64 connected between the collector of the transistor 62 and the ground, and a capacitor 65 connected between the collector of the transistor 62 and the input port I _5.
And a resistor 66 and a diode 67 connected in parallel between the input port I ₅ and the ground.

The drive control circuit 41 is a CPU composed of a one-chip microcomputer, and generates an operation signal from the output port O ₃ or O ₄ when the signal received by the sensor circuit 40 matches a predetermined code signal. Input port I ₂ of drive control circuit 41
ROM68 is connected to I ₄ . The ROM 68 stores the code number. The coils of relays 70 and 71 are connected to the output ports O ₃ and O ₄ of the drive control circuit 41 via resistors 72 and 73, respectively. The contacts of relay 70 are the power supply and the starter motor 74.
Connected between and. Similarly, the contacts of the relay 71 are connected between the power source and the fuel supply pump 75. The relays 70 and 71 form a load 76.

In the above-mentioned configuration, the infrared light emitted from the infrared light emitting device 16 when the switch 18 of the key means 2 is operated with the ignition switch 37 turned on is received by the infrared light receiving device 50. When the infrared light receiver 50 receives the infrared signal, the signal generated by the infrared light receiver 50 is supplied to the input port I ₁ of the drive control circuit 41 via the amplifier circuit 51. At the same time, when the amplifier circuit 51 is turned on, the transistor 62 is turned on. Therefore, the trigger signal is applied to the input port I ₅ of the drive control circuit 41 via the reset circuit 63, and the drive control circuit 41 is activated. Therefore, the drive control circuit 41 stores the received light signal supplied to the input port I ₁ by the storage means. Simultaneously with or after this, the drive control circuit 41 uses the fixed number stored in the ROM 68 as a RAM (Random Acc
ess Memory) and other storage means.

Here, the comparison means provided in the drive control circuit 41 compares the code signal contained in the signal of the remote control transmitter 1 supplied through the infrared receiver 50 with the code signal stored in the ROM 68. To be done. When the received code signal and the read code signal do not match, no output is generated from the output port O ₃ or O ₄ . On the contrary, when these fixed numbers match, an output is generated from the output port O ₃ or O _{4 of} the drive control circuit 41, and the starter motor 74 and the fuel supply pump 75 are operated.

In the above structure, when the key portion 4 is inserted into the steering lock device 5 and rotated, the steering lock device 5 is unlocked. The ignition switch 37 is turned on with the rotation of the key portion 4, and the key cover 11 of the key means 2 is provided with the cam 31 provided on the steering lock device 5.
To the open position where the fixed contact 14 of the key means 2 is exposed. When the key portion 4 is further rotated, the contact point 34 of the steering lock device 5 and the fixed contact point 14 of the key means 2 come into contact with each other to supply electric power to the key means 2, and the infrared generator of the key means 2 generates a remote control signal. To do. This remote control signal is received by the infrared receiver 50, and the starter motor 74 and the fuel supply pump 75 of the electronic lock device 6 are activated.

The embodiment shown in FIG. 12 can be modified. Instead of the third diode 83, a voltage drop semiconductor such as a transistor or other electric component can be used. Further, in the above embodiment, an example of using infrared rays as the remote control signal is shown, but electromagnetic waves such as radio waves or sound waves may be used in addition to infrared rays.

Effect of the Invention As described above, the remote control signal generation circuit according to the present invention has a built-in battery and a terminal capable of supplying external power, and can be used as either a battery built-in type or an external power supply type. For this reason, even if one of the batteries has a low battery capacity, it can be used by the external power supply system, and conversely, even if the contact becomes defective and the contact is in a poorly energized state, it receives power from the battery to operate the receiver. be able to. Further, since the battery built-in type and the external power supply type are used together, the battery capacity does not decrease in a short time and the battery can be used for a long time. Furthermore, the transmitter can be used for both remote and approach operations.

[Brief description of drawings]

FIG. 1 is a perspective view of a dual lock device using a remote control signal generating circuit according to the present invention, FIG. 2 is an exploded perspective view, and FIG.
FIG. 4 is an assembly view of the key means, FIG. 4 is a perspective view of the terminal,
FIG. 5 is a partial sectional view of the key means, and FIG. 6 is a front view showing a state in which the key means is inserted in the steering lock device,
7 is a front view showing a state in which the key means is rotated to the start position, FIG. 8 is a sectional view showing a state in which the key means is inserted into the steering lock device, and FIG. 9 is a state in which the key means is rotated to the start position. 10 is a partial front view of the key means in a state where the fixed contact is covered by the slide member, and FIG. 11 is a partial front view of the key means in a state where the fixed contact is exposed. FIG. 12 is an electric circuit diagram of a key means showing a remote control signal generating circuit according to the present invention, FIG. 13 is a circuit diagram showing an electric configuration of the key means, a mechanical locking device and an electronic locking device, and FIG. It is an electric circuit diagram of a locking device. 9 ...... battery, 14 ...... fixed contact (power supply terminal), 16 ...... infrared generator (remote control signal generating means), 18 ...... switch, 80 ...... transmission control circuit, I ₁ ...... first input Terminal, I ₂ ...
… Second input terminal, I ₃ …… Third input terminal, O ₁ …… Output terminal, 85,87 …… Trigger circuit, 81 …… First diode, 84 …… Third diode, 91… … Transistor (switching element), 92 …… Second diode,

Claims (2)

[Scope of utility model registration request] 1. A transmission control circuit having a battery having a positive side terminal and a negative side terminal, first and second input terminals respectively connected to the positive side terminal and the negative side terminal of the battery, and a transmission control circuit comprising: A trigger circuit connected to the third input terminal, a switch connected between the trigger circuit and the positive terminal of the battery,
A switching element having a control terminal connected to the output terminal of the transmission control circuit and connected to the output side of the switch;
In a remote control signal generating circuit having a remote control signal generating means that is energized when the switching element is turned on, a first diode is provided between the first input terminal of the transmission control circuit and the positive side terminal of the battery. Remote control signal generation, characterized in that the power supply terminal is connected between the first input terminal and the first diode through the second diode, and the power supply terminal is further connected to the switching element. circuit. 2. The remote control signal generation circuit according to claim 1, wherein a third diode is connected between the switch and the third input terminal of the transmission control circuit.