JPH02288592A - Transmitter - Google Patents

Abstract

PURPOSE:To always confirm the time by providing a clock means frequency- dividing a clock pulse and displaying the time to a transmitter generating an electromagnetic wave including a specific code synchronously with the clock pulse. CONSTITUTION:A pulse generating circuit 27 generating a clock pulse is connected to an input port I7 of a transmission control circuit 10, a time display section 4 is connected to an output port O4, and a frequency divider receiving a clock pulse and generating a time signal is provided. When a switch 12 is turned on manually, the transmission control circuit 10 reads a specific code stored in a ROM 26 and produces an output of a high or a low level to an output port O1 synchronously with a pulse generated from a pulse generating circuit 27 and an infrared ray signal including a prescribed code is sent from a diode 20. Thus, the transmitter able to confirm a data and time is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a transmitting device, and particularly to a transmitting device with a clock that operates a controlled device using electromagnetic waves such as infrared rays.

For example, as shown in Japanese Patent Publication No. Sho 63-11509, a remote control device that unlocks a lock device using infrared rays containing a predetermined code number is known. This remote control device includes a transmitting device that includes a manually operated switch, and a locking device that receives infrared rays emitted from the transmitting device when the switch is pressed and detects a predetermined code number included in the infrared rays. and a receiving device that supplies an operating signal to the receiver. In a remote control device that uses infrared rays, an infrared ray containing a predetermined code number transmitted from a transmitting device is received by a receiving device, and when the infrared rays containing a predetermined code number match the code number stored in the receiving device, the lock device is unlocked. A lock signal is generated. This remote control device is approximately 1 point per sensor section of the light receiving device.
The locking device can be unlocked by emitting infrared rays from a position more than m in front, which has the advantage of simplifying and speeding up the unlocking operation by suppressing the switch of the transmitting device.

Remote control technology that uses infrared rays containing specific codes to control the operation of electronic devices is used in various fields.

For example, when changing television channels, a transmitter emits infrared rays containing different codes for each channel. These codes are fixed, unchanging code signals.

The transmitting device used in the remote control device mentioned above is often carried around at all times and transmits infrared signals when needed. It is desirable to be able to confirm this.

Furthermore, programmable remote controllers are commercially available that store transmitted infrared signals and generate infrared signals containing the same code. The receiving device of the programmable remote controller and the light emitting device of the infrared transmitter are placed close to each other.

When both power switches are turned on at the same time for a certain period of time, the infrared code signal sent from the infrared transmitter is stored in the memory in the programmable remote controller.
A switch on the programmable remote controller can then be operated to switch the contents of the memory to the memory location to be read by the desired switch. Thereafter, by operating the desired switch, the transmitting device of the programmable remote controller can generate a signal identical to the infrared code signal transmitted from the infrared transmitter.

Therefore, in the conventional remote control device, the lock device is unlocked when the code number included in the infrared rays transmitted in one direction from the transmitting device toward the receiving device matches the code number stored in the receiving device. Because an unlock signal is generated,
The infrared signal transmitted from the transmitting device is stored in the memory of the programmable remote controller. Thereafter, when the switch on the programmable remote controller is operated, the same infrared signal is generated, so that the programmable remote controller can be used to unlock the lock device as appropriate.

Therefore, as long as programmable remote controllers exist, the effectiveness of preventing unauthorized unlocking or theft will be diminished for locking devices that unlock using infrared signals.

Therefore, an object of the present invention is to provide a transmitting device that can confirm the date and time. Another object of the present invention is to provide a transmitting device including transmitting means including a timer code for displaying time and a unique code symbol.

A transmitting device according to the present invention includes a power source, a pulse generating means connected to the power source and generating a clock pulse, a transmitting means connected to the power source via a switching element, and a clock pulse of the pulse generating means. It has a clock means having a time display section that divides the frequency of the pulse and displays the time, and a trigger circuit that applies a trigger signal to the transmitting means when the switching element is turned on. When the trigger signal is generated, the transmitting means generates an electromagnetic wave containing a unique code in synchronization with a clock pulse generated from the pulse generating means. The transmitting device is provided on the key holder or key head. The transmitting means includes a timer code indicating time and a unique code symbol.

The term "timer code" used in this specification refers to all code signals expressed as electrical codes that change over time.For example, "timer code" refers to year, month, day,
An electrical symbol code representing a time such as 1 second can be used. Also, regardless of these absolute dates and times,
A clock signal may be used to synchronously advance the first timer code and the second timer code.

Operation -m-m- The clock means divides the frequency of the clock pulse of the pulse generating means and provides an output for constantly displaying the time on the time display section. Therefore, the time can be checked at all times through the time display section.

Also, the switching element was turned on. At this time, a trigger signal is generated from the trigger circuit.

This trigger signal is applied to the transmitting means, and the transmitting means generates an electromagnetic wave containing a unique code in synchronization with a clock pulse generated from the pulse generating means. That is, the transmitting means counts the received clock pulses as address signals from the time when the trigger signal is received, determines high level or low level output at the timing corresponding to each address signal, forms a unique code symbol, and transmits the electromagnetic wave. Send by. Further, the transmitting means can combine (mix) a timer code indicating time with a unique code and transmit the result.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a perspective view showing an embodiment of the invention in which a transmitter 1 is attached to a key, and FIG. 2 is an exploded perspective view of the transmitter 1 shown in FIG. The transmitting device 1 has a casing 2 made of synthetic resin.
, a key blade 3 protruding from the casing 2 , and a suppressing portion 12 of the switch 12 formed in a part of the casing 2
a and a time display section 4. The casing 2 functions as a key head for holding the key with respect to the key blade 3. The casing 2 consists of a front member 5 and a back member 6.

Between the front member 5 and the back member 6, there is a substrate 7 on which a transmission control circuit 10, a liquid crystal time display section 4, a switch 12, an infrared light emitting diode 20, a light emitting diode 23 as an indicator are mounted, and a power source 13. Placed. Power supply 1
3 is a small battery. A pressing portion 12a is formed on the front member 5 of the casing 2, and a window 5a through which the time display portion 4 can be viewed visually is formed. Further, a holder 8 is arranged inside the back member 6 to be in contact with an electrode of the power source 13. The light emitting diode 23 is arranged facing the opening 5b of the front member 5.

FIG. 3 shows an example in which a casing 2 made of a resin mold type sealing body is used instead of the casing 2 made of the front member 5 and back member 6 shown in FIG.

This has a structure in which the electronic circuit of the transmitter 1 is covered with a resin sealant as a hybrid IC. Further, in the example shown in FIG. 4, an example is shown in which the transmitting device 1 is configured as a key holder. This example basically has a structure similar to that shown in FIG. 1, but the key blade 3 is not provided and a holder ring 9 is detachably provided on the casing 2.

FIG. 5 shows an electrical circuit diagram of the transmitter 1. As shown in FIG. The transmitting device 1 includes a transmitting control circuit 10 consisting of a one-chip microcomputer (CPU), and a ROM (Read Only) connected to the transmitting control circuit 10 and storing a unique code.
Memory) 26, a switch 12 as a switching element having one end connected to the input port of the transmission control circuit 1o via a capacitor 11, and a power supply connected in parallel between the other end of the switch 12 and ground. 1
3 and a smoothing capacitor 14, a chattering prevention capacitor 15 connected between one end of the switch 12 and the ground, and a pulse shaping resistor 16 and a diode connected in parallel between one end of the capacitor 11 and the ground. 17, a transistor 19 having a base connected to the output port 0□ of the transmission control circuit 10 via a resistor 18 and an emitter connected to the ROM 26, and a transistor 1
A diode 20 and a resistor 21 for infrared radiation are connected in series between the collector of 9 and the ground, and a resistor 22 and a light emitting diode 23 are connected in series between the output port 02 of the transmission control circuit 10 and the ROM 26. , a resistor 24 connected between the other end of the capacitor 11 and the ground, and an oscillation resistor 25 connected to the input ports 2 and I of the transmission control circuit 1o. The capacitor 11 and the resistor 16 constitute a trigger circuit that provides a trigger signal to the transmission control circuit 10. Transmission control circuit 10, transistor 19
and the infrared light emitting diode 20 constitute a transmitting means.

Capacitor 11 is connected to ROM 26 and switch 12
The other end is connected to the output port O1 of the transmission control circuit 10. Further, a pulse generation circuit 27 as a pulse generation means for generating clock pulses is connected to the input port 7 of the transmission control circuit 10. The pulse generation circuit 27 divides a clock pulse generated from a piezoelectric vibrator such as a crystal or other high frequency oscillation circuit, or transmits it to the transmission control circuit 1 without frequency division.
Give a clock pulse to 0. In addition, the transmission control circuit 1
A time display section 4 is connected to the 0 output port 04. The 0 time display section 4 is a numeric display section composed of a liquid crystal or a light emitting diode.

As shown in FIG. 6, the transmission control circuit 10 includes an R/S flip-flop 30 connected to an input port
An AND gate 31 connected to the Q terminal of the flip-flop 30 and the pulse generator 32, an address counter 33 connected to the output terminal of the AND gate 31, and a ROM 2
When the code stored in the address counter 6 is read out and the address signal of the address counter 33 is received, a high level or low level output corresponding to each address signal is output to the output port 0.
R A M (Ralldom Accesses)
s Mem.

ry) 34, a branching unit 35 which receives the output of the pulse generator 32 connected to the pulse generation circuit 27 and generates a time signal, and a branch unit 35 which generates a pulse when the RAM 34 receives a reset signal from the address counter 33. A shot multivibrator 37, an invert 39 provided between the one-shot multivibrator 37 and the output port O8, and a latch 36 that stores the time signal of the one-channel divider 35 when receiving the output of the one-shot multivibrator 37. and a pulsing circuit 38 that sends a time signal based on the BCD signal stored in the latch 36 to the output port 01. The time display section 4 and the pulse generator 32 constitute clock means.

In the above configuration, when the switch 12 is turned on manually, a reset pulse is applied to the input port x via the capacitor 11 and the resistor 16.

Therefore, the R/S flip-flop 30 of the transmission control circuit 10 is set, and the AND gate 31 is connected to the pulse generator 3.
2 pulses are sent to the address counter 33. Therefore, the address signal of the address counter 33 causes the RA
M34 reads the unique code stored in the ROM 26 and produces a high level or low level output at the output port 01 in synchronization with the pulse generated from the pulse generating circuit 27.

Therefore, the transistor repeats on and off, and an infrared signal containing a predetermined code is transmitted from the diode 20. When the address counter 33 generates the last address signal, the RAM 34 provides a reset signal to the R/S flip-flop 30 and also provides a clear signal to the address counter 33.

Further, the latch 36 stores the time signal of the frequency divider 35 by the output of the one-shot multivibrator 37, and the time signal based on the BCD signal stored in the latch 36 is passed through the pulse generator 38 to the output port following the predetermined code. 01. Therefore, the transistor repeats on and off, and an infrared signal including a timer code is transmitted from the diode 20. The infrared rays from diode 20 are 1
It is output repeatedly one or more times. At the same time, the light emitting diode 23 is turned on for a short time by the output of the one-shot multivibrator 37.

The unique code is the sending bag r! It is used to determine whether the signal emitted from the receiver 11 is a signal suitable for the receiving device. In addition, the unique code is a number unique to each transmitting device. For example, the code number is 1.000,000 to 2.
,000,000 digit signals are displayed. There are various ways to pulse encode the unique code and time code. For example, a fixed time code number may be displayed at the beginning of infrared on/off. Alternatively, the time code may be displayed between each digit of the unique code. It is also possible to insert a code and display it as an infrared signal.

FIG. 7 shows a circuit diagram of the receiving device 43, receiving device i! i
43 includes a sensor circuit 40 , a reception control circuit 41 that receives a signal from the sensor circuit 40 , and a lock control circuit 42 that is activated by the output of the reception control circuit 41 . The sensor circuit 40 includes a one-chip infrared light receiving circuit 50 and an amplifier circuit 51 that amplifies a signal received by the infrared light receiving circuit 50 and supplies the amplified signal to the reception control circuit 41. Amplification circuit 51
has two transistors 52 and 53. The positive line 54 of the sensor circuit 40 is connected to the output port 01 of the reception control circuit 41, and the negative 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. Also,
The positive line 54 is a display light emitting diode 58 and a resistor 5.
9 to the output port 0.9 of the reception control circuit 41. connected to.

The emitter of the transistor 52 is connected to the positive line 54°, the base is connected to the light receiving circuit 50, and the collector is connected to the base of the transistor 53. The emitter of the transistor 53 is connected to the negative line and the collector is connected to the input port of the reception control circuit 41 via a diode 60, and is connected to the base of the transistor 62 via a diode 61. The emitter of the transistor 62 is connected to the power supply, and the collector is connected to the input port of the reception control circuit 41 via the reset circuit 63. The reset circuit 63 includes a resistor 64 connected between the emitter of the transistor 62 and the ground, a capacitor 65 connected between the emitter of the transistor 62 and the input port 7, and a capacitor 65 connected in parallel between the input port and the ground. A resistor 66 and a diode 67 are connected to each other.

The reception control circuit 41 is a CPU composed of a one-chip microcomputer, and a ROM 68 is connected to input ports I, to I4 of the reception control circuit 41. ROM68
has a fixed number stored in it. Transistors 70 and 71 as driver circuits are connected to output ports 03 and 04 of the reception control circuit 41 via resistors 72 and 73, respectively.

The collector of the transistor 70 is connected to the coil 75 of the relay 74.
The emitter is connected to the power supply through the emitter and grounded. Similarly, the collector of transistor 71 is connected to the power supply via coil 77 of relay 76.

The emitter is grounded. Of the three contacts of relays 74 and 76, contacts 74a and 76a are connected to the power source. Contact 7
4b and 76b are grounded. Contacts 74c and 76c are connected to both terminals of a motor 80 that drives the locking device. A back electromotive force prevention controller 81 is connected to the motor 80 .

Input ports I and 1s of the reception control circuit 41 are connected to a state detection device 82 that detects the locked state and unlocked state of the locking device. The state detection device 82 has a switch 90 (FIG. 8), which is switched during locking and unlocking operations of the locking device.

A pulse generation circuit 83 that generates clock pulses is connected to the reception control circuit 41.

As shown in FIG. 8, the reception control circuit 40 is connected to an input port 91, a unique code detecting means 91, a unique code reading means 92, . It has timer code detection means 93 and timer code reading means 94. When the unique code successive means 92 receives the output of the unique code detecting means 91, it stores the unique code received from the input port, compares it with the unique code stored in the ROM 68, and when it matches, outputs it to the AND gate 95. give. Further, when the timer code reading means 94 receives the output of the timer code detecting means 93, the timer code received from the input port is stored, and the timer code generated by the timer code generating means 99 which counts the output of the pulse generating circuit 83 is stored. Compare with timer code. When compared with the timer code, when they match, an output is given to the AND gate 95. The output of AND gate 95 is input to AND gates 96 and 97. Switch 9o is connected to AND gates 96 and 97. The outputs of AND gates 96 and 97 are respectively output from output ports 0. and ○ are connected.

In the above configuration, the infrared rays generated from the infrared ray emitting diode 20 when the switch 12 of the transmitter 1 is activated are received by the infrared light receiving circuit 50. A signal generated by the infrared light receiving circuit 50 is supplied to the input port 11 of the reception 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, a trigger signal is applied to the input port It of the reception control circuit 41 via the reset circuit 63, and the reception control circuit 41 is activated.

Therefore, the unique code reading means 92 and timer code reading means 94 of the reception control circuit 41 store signals indicating the unique code and timer code supplied to the input port T□, and store the unique code and timer code respectively stored in the ROM 68. It is compared with the timer code generated by the pulse generation circuit 83. When both match, AND gate 95 produces an output, and either AND gate 96 or 97 selected by switch 90 produces an output.

The reception control circuit 41 sends an output to the transistor 70 from the output port O3 through the AND gate 96 for a certain period of time (for example, 0.5 seconds). For this reason.

Transistor 70 turns on and coil 7 of relay 74
5 is energized, contacts 74a and 74c are connected, and motor 80 rotates in one direction. Therefore.

A locking device (not shown) unlocks the door. On the contrary, the control device i!
41 receives a signal from the state detection device 82 and transmits the signal! !
When the locking device receives an infrared signal emitted from O2 and is in a locked state, it outputs an output from the output port O2 for a certain period of time (for example, 0.5 seconds) and turns on the transistor 71. Therefore, the relay 76 is energized and the coil 77 is energized, so that the contacts 76a and 76c are connected. Therefore, a current flows in the opposite direction to the motor 80, and the locking device is locked.

The above embodiment of the present invention can be modified. For example, infrared rays are used to communicate between the transmitter EI and the receiving bag M43, but in addition to infrared rays, various electromagnetic waves such as ordinary visible light and radio waves may be used. can do.

Since the transmitting device of the present invention constantly displays the time through the time display section, it is possible to recognize the accurate time. In addition, by combining a unique code and a timer code with the electromagnetic waves emitted from the transmitting device, even if the electromagnetic waves are copied, the receiving device cannot be operated with the copied signals, which is effective in preventing unauthorized use of the receiving device. can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention in which a transmitting device is attached to a key, Fig. 2 is an exploded perspective view of the transmitting device shown in Fig. 1, and Fig. 3 shows a casing made of a resin molded sealing body. FIG. 4 is a perspective view showing an example in which the transmitting device is applied to a key chain, FIG. 5 is a circuit diagram of the transmitting device according to the present invention, and FIG. 6 is the transmitting device shown in FIG. 5. FIG. 7 is a block diagram showing details of the transmission control circuit of the device, FIG. 7 is a circuit diagram of the receiving device, and FIG. 8 is a block diagram showing details of the receiving control circuit of the receiving device shown in FIG. 11. Transmission device ff! , 4. , time display section (clock means) 100. Transmission control circuit (transmission means), 27. . Pulse generation circuit (pulse generation means), 12. , switch (switching element), 13. , power supply, 329. Pulse generator (clock means), 11. , capacitor, 16. , resistance (trigger circuit), Figure 2 η7 ・Safe diagram floor diagram

Claims (3)

[Claims] (1) Pulse generating means for generating clock pulses;
a transmitting means connected to a power supply via a switching element; a clock means having a time display section that divides the clock pulse of the pulse generating means and displays the time; and a trigger circuit for applying a trigger signal, and the transmitting means generates an electromagnetic wave containing a unique code symbol in synchronization with a clock pulse generated from the pulse generating means when the trigger signal is generated. Device. (2) The transmitting device according to claim (1), wherein the transmitting device is provided on a key holder or a key head. (3) The transmitting device according to claim 1, wherein the transmitting means includes a timer code for displaying time and a unique code code.