JPH02229372A - Optical operation control device - Google Patents

Abstract

PURPOSE:To improve burglar preventing performance with a small-sized and inexpensive mechanism by making an optional lock releasing code number changeable only when the input signal from a key switch accords with a determined fixed code number. CONSTITUTION:A plurality of key switches 80-84 are operated in a determined order, and the generated signal is inputted to a fixed code number comparing means 90 in an operation control circuit 18. This signal is compared with fixed numbers preliminarily stored by a fixed code number memory means 78, and when it accords with the fixed number, a memory permitting signal is generated. Then, a light is irradiated from a light emitting device 11 and converted into a specified code number, which is then received by a light receiving sensors 14-17 and compared with lock releasing code numbers stored in a latch means 77 in a new comparing means 93. When this is different from the code numbers, it is newly stored in an optional lock releasing code number memory means 94. Thereafter, this device is controlled only by the key operation converting the light irradiated from the light emitting device 11 to the specified code number.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an operation control device, and particularly to an optical operation control device that can operate a controlled device using a specific optical signal. For example, as shown in Japanese Unexamined Patent Publication No. 173354/1982, there is a key that generates an optical signal containing a predetermined code signal, and a key that generates a matching signal when the optical signal emitted from the key is received. A device for preventing theft and swearing that has specific code discrimination means is known. This anti-theft device has a picking signal output means, and when the lock is unlocked without generating a matching signal from the specific code discrimination means, it is determined that the lock has been unlocked illegally and an alarm device is activated. However, if the lock is unlocked while an optical signal emitted from the key is received and a matching signal is generated from the specific code discrimination means, the alarm device will not be activated. Furthermore, Japanese Patent Application Laid-Open No. 174476/1982 discloses a key that generates an optical signal including a predetermined code signal, and a specific code that is provided in a lock device and generates a matching signal when the optical signal emitted from the key is received. An electronic a-control device for houses, automobiles, etc. is disclosed, which includes a determining means and a controlled section that is activated by a matching signal from the specific code determining means. This electronic control device includes a battery, a switch means, a wg switching circuit connected to the battery and the switch means, a specific code generating means operated by the output of the power switching circuit, and a specific code generated by the output of the specific code generating means. It has 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 discrimination means. The specific code discrimination means sends an output to the controlled unit when the signal received by the light receiving element matches a preset code signal. Further, as shown in Japanese Patent Publication No. 56-11032, a locking device is known which includes a locking mechanism that operates the locking part by electrical means and a key mechanism equipped with a transmitter. Each of the lock mechanism and the key mechanism is provided with a pulse pattern generator that generates a specific pulse train at intervals of a predetermined number of clock signals generated over time from the oscillator of the key mechanism. The lock mechanism and the key aa* are connected to each other by an optical transmission means, and when the pulse trains of both coincide in time,
The locking part of the locking mechanism is unlocked. Tokuko Sho 63-115
As shown in Publication No. 09, a control device for a car lock is known which includes a transmitting section independent of the vehicle and a receiving section mounted on the vehicle. The transmitter is DC 1! It is equipped with a source, an oscillator that oscillates a message, and a transmitter that remotely transmits the message in series. In addition, the receiving unit compares the received message and the message stored in the memory with the power supply device, the receiving device that receives the message, and the memory that stores only one encoded message, and if the two match, and a comparator that generates one signal. The transmitter of the transmitter has a diode that emits infrared rays,
The receiving device in the receiving section has a photodetector diode. Also, in the specification of U.S. Patent W14,148,372,
A locking device is disclosed that unlocks the door when an electric resistor attached to a key has a predetermined resistance value. However, this locking device has the disadvantage that it cannot store a new electrical resistance value when the key is lost. That is, when a key is lost, keys having 15 types of electrical resistors must be individually inserted into the lock device and tested to see if they are appropriate electrical resistors. If the electrical resistance is not proper, the locking device will stop functioning for a predetermined period of time (for example, 20 minutes). For this reason, long inspection work is required when selecting an appropriate electrical resistor. By the way, the conventional optical transmitting device includes various electronic circuits such as a battery, a transmitting circuit, a code signal generating circuit, a light emitting device, etc., and the electronic circuit is complicated. For this reason, it was difficult to attach these electronic circuits to small keys. In addition, the number of manufacturing steps for the optical electronic control device was large, which resulted in a high manufacturing cost. Furthermore, with conventional optical electronic control devices, it was not possible to change the code signal by storing a new optical code signal as appropriate. In order to improve these points, the applicant has filed Utility Application No. 62-21731 (Utility Application No. 63-1).
We have developed a new lock system disclosed in No. 29084). This lock system is an optical lock control that converts the light emitted from the lock device into a predetermined code signal using an optical device installed in the key, and unlocks the lock when the converted light is received by the lock device. It is a device. However, with this optical lock I11#l device, a new code number can be easily stored by turning the switch on or off, so if the key is lent to someone else, the code number can be changed immediately. For this reason, it had the disadvantage of having a low anti-theft effect. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide an optical operation control device with a high anti-theft effect in which the unlock code number cannot be easily changed. The optical operation fH control device according to the present invention for a door has an operation control circuit, a light receiving sensor and a plurality of key switches connected to an input terminal of the operation control circuit, and a cover connected to an output terminal of the operation control circuit. It has a control device and a light emitting device. The operation control circuit stores a fixed code number and an optional unlocking code number, and compares the stored optional unlocking code number with the signal received by the light receiving sensor and sends an output to the controlled device when they match. After comparing the input signals of multiple key switches and the fixed code number and finding a match, the stored unlocking code number is compared with the new unlocking code number received by the light receiving sensor, and if they do not match, a new unlocking code number is set. Memorize the unlock code number. The operation control circuit also compares the fixed code number storage means for storing the fixed code number with the fixed code numbers stored in the plurality of key switches and the fixed code number storage means, and generates a storage permission signal when they match. a fixed code number comparison means for storing an arbitrary unlocking code number; a timer means activated by a storage permission signal of the fixed code number comparing means; an arbitrary unlocking code number storage means for storing an arbitrary unlocking code number; and an arbitrary unlocking code number storing means. an arbitrary unlocking code number comparison means for comparing the arbitrary unlocking code number stored in the memory and the signal received by the light receiving sensor and transmitting an output to the controlled device when they match;
Temporary storage means for storing a new optional resolution code number received by the light receiving sensor while the output of the timer means is being generated; Compare the new optional unlocking code number with the optional unlocking code number stored in the optional unlocking code number storage means, and if they do not match, select a new optional unlocking code number stored in the temporary storage means. It has a new comparison means that stores an arbitrary unlock code number in the storage means. The signals generated when multiple key switches are operated in a predetermined order are input to the fixed code number comparison means of the operation control circuit. The fixed code number comparison means compares the fixed code number stored in the fixed code number storage means with the signal generated by the key switch, and when they match, a storage permission signal is generated from the fixed code number comparison means. After that, the light emitted from the light emitting device is converted into a predetermined code number and received by the light receiving sensor. The optical signal received by the light receiving sensor is compared with the unlocking code number stored in the latch means in the new comparing means, and if there is a difference, it is newly stored in the optional unlocking code number storage means. Therefore, it is then possible to drive the optical operation control device using only the key that converts the light emitted from the light emitting device into a specific code number.夾-▲Kazuo Below, an embodiment of the optical operation I1 control device according to the present invention applied to a steering lock device for an automobile will be explained with reference to FIGS. 1 to 7. First, as shown in FIG. 1, the optical operation control device 10 according to the present invention includes two light emitting devices 11 and
four light receiving sensors 14 to selectively receive light emitted from the light guide member 13 of the key 12 (FIG. 5);
17, an operation control circuit 18 as a comparison means that generates a coincidence signal when receiving the output of a predetermined light receiving sensor;
It consists of a starter interrupt relay 19 as a controlled device that is activated by a coincidence signal from an operation control circuit 18. As shown in FIG. 112 and FIG. 3, the light emitting device M11 includes a substrate 21 arranged adjacent to the key insertion portion 20 of the steering lock device, and a pair of infrared light emitting devices arranged opposite to the key insertion portion 2o. It has a diode 22. Also,
As shown in Figure 4, the angle is 90m with respect to the diode 22.
The light receiving sensors 14 to 17 are arranged in a line at the 1st position. The key 12 includes a metal key blade 23, a resin head 24 formed at one end of the key blade 23, and a light guide member 13 provided within the head 24. The key blade 23 of the key 12 is shown in Figure jI2 and 113.
As shown in the figure, it is inserted into the key cylinder 25 of the steering lock device when unlocking. As shown in FIG. 6, the light guide member 13 is made of a light-transmitting resin such as silicone resin or acrylic resin, and includes a light receiving section 30 formed in one part of the light guide member 13, and four light receiving sections 30 from the light receiving section 30. Light guide section 3 branched into
1 and four light emitting parts 3 formed on the other ring of each light guide part 31.
2. The light receiver 130 is exposed from the head part 24 on one side of the key blade 23, and is connected to the infrared light emitting diode 22.
Receives the light of Reversible keys, which can be inserted into the key cylinder 25 and unlocked even after being rotated 180 degrees, are often used today for automobile keys. Therefore, even if the key 12 is rotated by 180 degrees from the state shown in FIG. A pair of diodes 22 are provided. The light guide portion 31 of the light guide member 13 passes through the head portion 24, and each end surface of the light emitting portion 32 is exposed from the linear weave portion 26 of the head portion 24. When the key 12 is inserted into the key cylinder of the steering lock device and rotated from the lock position to the start position, the infrared light emitted from the light emitting diode 22 at the start position is guided from the light receiving part 30 of the light guide member 13. It passes through the light section 31 and reaches the light emitting section 32. From the light emitting part 32 to the light guide member 13
The infrared light irradiated to the outside is received by the light receiving sensors 14 to 17. In the illustrated example, the light guide portion 31 of the light guide member 13 has four
The light emitting section 32 is branched into four light emitting sections 32, but some of the four light emitting sections 32 are selectively cut off and a key code is set. That is, an optical key code is set depending on the presence or absence of infrared light to the light receiving sensors 14 to 17. As shown in FIG. 11, a power supply positive terminal 4o connected to the positive terminal of a battery (not shown) is connected to the emitter of a transistor 43 via a diode 41 and a resistor 42. The collector of the transistor 43 is a reset circuit 44
It is connected to the reset terminal R of the operation control circuit 18 via. Power supply negative terminal 46 connected to the negative terminal of the battery
A constant voltage diode 47 is connected between the emitter of the transistor 43 and the emitter of the transistor 43. Further, the resistor 48 and the other end of the capacitor 53, each having one end connected to the capacitor 45 of the reset circuit 44, are connected to the negative side terminal 46 of the power supply. Furthermore, a resistor 50, a capacitor 51, and a diode 52 are connected in parallel between the capacitor 45 and the reset terminal R, and between the power supply negative terminal 46. The capacitor 45 and the resistor 5o constitute a pulse shaping circuit, which applies a pulse signal to the reset terminal R. As shown in FIG. 1, the transistor 58 is connected to a switch 53 such as an ignition switch or a starter switch, and when the ignition switch or starter switch is turned on, the base of the transistor 58 is connected through resistors 56 and 57. Supply current to. Resistors 56 and 5
A constant voltage diode 59 is connected between 7 and 7. The emitter of the transistor 58 is grounded, and the collector is connected to the resistor 6.
0 to the base of transistor 43. Further, the base of the transistor 43 is connected to the collector of the transistor 61. The base of the transistor 61 is connected to the output terminal o1 of the operation control circuit 18, and the emitter is grounded. Further, the collector of the transistor 58 is connected to the input terminal 6 of the operation control circuit 18. When the transistor 58 is turned on, the input terminal 6 goes to a low voltage level, and the operation control circuit 18 is switched from standby mode to operating mode for a certain period of time by built-in timer means. When a certain period of time has elapsed in the operation mode, the starvation timer means generates an output from the output terminal 01 and outputs the output from the transistor 61.
Turn on. Therefore, the base potential of transistor 43 decreases and transistor 43 is turned off. For this reason, operation! ! The control circuit 18 is switched from the operating mode to the standby mode. The light receiving sensors 14 to 17 are connected to input terminals II to 4 of the operation control circuit l8 via resistors 61 to 64. *Ta,
Each of the light receiving sensors 14-17 is connected to the collector of the transistor 43, and the collector of the transistor 43 is connected between the resistors 61-64 and the light receiving sensors 14-17 via resistors 65-68. Furthermore, the transistor 43
The collector of is connected to the operation control circuit 18 via a diode 9o.
It is connected to the input terminal 5 for the power supply. The outputs 02 and 03 of the operation control circuit 18 each have 2
The infrared light emitting diode 22 is connected through amplifiers 70, 71 and 72, 73. Further, a starter interrupt relay 19 is connected to the output terminal 04 via two amplifiers 1174 and 75. Furthermore, terminal P5 of RAM (random access memory) 77 is connected to terminal PL-P4.
~P8 is connected. The light receiving sensor 14 is in the RAM 77.
The input terminals 8 to IIO of the RAM 77 store the same information as the 4-bit code signal received from 8 to 17.
is connected to the collector of the transistor 43, and the RAM 77
The input terminal Ill of is connected to the negative side terminal 46 of the power supply. Operation benefit times j! The power supply negative side terminal 4 is connected to the input terminal I10 of 18.
6 is connected. In Figure 1, A and B indicate panes that are connected to each other. Key switches 80-84 are connected to input terminals Ill-115 of the operation control circuit J118 via resistors 85-89. Each key switch 80-84 is provided so that it can be connected or separated by a connector 90. Therefore, the controller provided with the key switches 80 to 84 can be installed inside the vehicle or at the dealer's factory. As another example, multiple key inches installed in a car's keyless entry system can be used as is. A keyless entry system is a locking device that can unlock a locking device when the input signal generated when multiple key switches are operated in a predetermined order matches the unlocking code number stored in the system. be. The output terminals P9 to P12 of the operation control circuit 18 are connected to a ROM (read only memory) 78 serving as fixed code number storage means for storing fixed code numbers. The operation control circuit 18 is configured as a chip microcomputer, for example. As shown in 118fl, the operation control circuit 18 includes a ROM 78 as a fixed code number storage means for storing fixed code numbers, a plurality of key switches 80 to 84, and fixed code numbers stored in the fixed code number storage means 78. A fixed code number comparison means 90 generates a storage permission signal when the fixed code number comparison means 90 compares the fixed code number comparison means 90 and generates a storage permission signal, a timer means 91 is activated by the storage permission signal of the fixed code number comparison means 90, and stores an arbitrary unlocking code number. A RAM 77 as an arbitrary unlocking code number storage means. RAM
Optional unlock code number stored in 77 and light receiving sensor 14
When the output of the arbitrary unlocking code number comparing means 94 and the timer means 91 is generated, which compares the signals received in steps 1 to 17 and sends an output to the starter interrupt relay 19 as a controlled device when they match. Light receiving sensor 14-1
RAM 92 as a temporary storage means for storing the new arbitrary unlocking code number received at step 7, and the new arbitrary unlocking code stored in the temporary storing means 92 when the output of the timer means 91 is generated. Compare the number with the arbitrary unlock code number stored in the arbitrary unlock code number storage means 77,
A new comparing means 93 is provided for storing a new optional unlocking code number stored in the temporary storing means in the optional unlocking code number storing means 77 when there is no match. In the timer means 91, the transistor 58 is turned on and the input Yasuko 6 is turned on.
The control circuit 18 has a function of switching the operation control circuit 18 from standby mode to operating mode for a certain period of time when an input signal is applied to it, and automatically switching from operating mode to standby mode after this certain period of time has elapsed. In the above configuration, the operation of the optical operation control device according to the present invention will be explained based on the operation sequence shown in Fig.jg7. At start 100 in FIG. 7, when the key 12 is inserted into the key cylinder 25 of the steering lock device and rotated from the locked position to the start position, the mechanical locking mechanism (not shown) of the steering lock device is unlocked. When the key 12 is turned to the start position, the ignition switch or starter switch (not shown) is turned on.
' Proceed from step 101 to step 102 in the m7 diagram.
At this time, the transistor 58 is turned on, so a trigger signal is supplied to the input terminal 6 of the operation control circuit 18, and the transistor 43 is turned on. Therefore, through the reset circuit 44, the reset terminal R of the operation control circuit 18
A reset signal is supplied to the gourd operation control circuit 18, and the gourd operation control circuit 18 is reset. When a trigger signal is supplied to the input terminal 6, the timer means 91 of the operation control circuit 18 is activated. Therefore, the operation control circuit 18 is switched from the standby mode to the operating mode for a certain period of time, and one infrared light emitting diode 22 of the light emitting device 11 is turned on. At this time, key 12
is rotated to the starting position, so the infrared light from the diode 22 enters the light receiving section 30 of the light guide member 13 and reaches the light emitting section 3.
2 is irradiated to the outside. In this state, the infrared light emitted from the light emitting section 32 is received by the light receiving sensors 14 to 17. However, in step 102, the light receiving sensor 14
17 does not receive infrared rays, it is determined whether the key 12 is a reversible key. With a reversible key, the light receiving part 30 is shifted by 180 degrees, so the light emitting device I
The other infrared light emitting diode 22 of E11 is turned on. The operation control circuit 18 determines that the key is of a different type when the signal received by the light receiving sensors 14 to 17 does not match the arbitrary unlock code number stored in the RAM 77 or when there is no input from the light receiving sensors 14 to 17. Newly, in step 114, the operating mode is switched to standby mode for a certain period of time (for example, 5 minutes) and the function is automatically stopped. When the signals received by the light receiving sensors 14 to 17 match the arbitrary unlock code number in step 103, the operation control circuit 18 sends the signal to the output terminal 04 via the amplifiers 74 and 75.
sends an output that is a coincidence signal to starter interrupt relay 19. For this reason, the starter interrupt relay
19 is turned on, it becomes possible to operate the starter motor (not shown) of the automobile to start the engine, and the engine starting output is turned on to start the starter motor (step 104). L, rudder, the signals inputted from the light receiving sensors 14 to 17 in step 103 are stored in the RAM 7.
When it is determined that the information is not the same as the information stored in the output terminal 04, a matching signal is not generated from the output terminal 04, so the starter motor cannot be operated. Thereafter, in step 105, it is determined whether the starter motor of the ignition switch is turned off, and if it is turned off, the engine starting output is stopped (step 106). When the engine starting output is stopped in step 106, or when the ignition switch is not turned on in step 101, the process proceeds to step 107,
When signals from a plurality of key switches 80 to 84 are input, it is determined in step 108 whether the input signals from the key switches 80 to 84 match the fixed code number stored in the ROM 78 (step 108). ．． If the input signal does not match the fixed code number in step 108, the process proceeds to stop 113, but if they match, the fixed code number comparison means 9o activates the timer means 91 in step 109. The timer means 91 generates an output for a certain period of time. The output of the timer means 91 provides a high level output to the enable/disable terminal I/D terminal of the RAM 92 to energize the RAM 92. At the same time,
The output of the timer means 91 provides a high level output to the enable/disable terminal I/D terminal of the new comparing means 93, thereby energizing the new comparing means 93. Next, step 1
At step 10, it is determined whether an input signal has been received from the light receiving sensor. If not, at step 116, it is determined whether a predetermined time counted by the timer means 91 has elapsed. If the specified time has not passed, proceed to step 1.
10, and if the time has elapsed, the output of the timer means 91 is stopped and the process proceeds to stop 113. While the output of the timer means 91 is being generated, optical signals from the light receiving sensors 14 to 17 are received in step 110, and this optical signal is stored in the RAM 92 as a new arbitrary unlocking code number. At the same time, the new comparison means 93 is transferred to the RAM 92.
The new optional unlocking code number stored in the RAM 94 is compared with the optional unlocking code number stored in the RAM 94, and if they do not match, a write signal is applied to the write/read terminal of the RAM 77. Therefore, the RAM 77 momentarily stores the new arbitrary unlock code number stored in the RAM 92 (step 111). Therefore, after that, only when a new optical signal is received from the light receiving sensors 14 to 17,
The starter interrupt relay 19 can be activated and the previous key 12 cannot be used. After storing a new arbitrary unlocking code number, the timer means 91 sends out an output from the output terminal o1, the transistor 61 is turned on, and the transistor 43 is turned off, so the operation control circuit 18 changes from the operating mode to the standby mode. It can be switched to Although the above embodiment shows an example in which the present invention is applied to a steering lock device for an automobile, this invention is not limited to a steering lock device, but can be applied to other automobiles, vehicle lock devices, architectural lock devices, or other controlled objects. It will be appreciated that the invention can be applied to the operation of devices. In addition, in the above-described embodiment, if a light emitting diode that emits infrared light in the invisible region is used, it is impossible to determine which of the plurality of light emitting parts 32 is emitting light, so the theft prevention effect is high in this respect. Yes. However, instead of invisible infrared light, it is possible to use light-emitting diodes that produce normal visible light. In addition, although a starter interrupt relay is shown as a controlled device, the invention is not limited to this, and examples include an electrically operated locking device, a fuel supply Ig.
It is possible to use various devices such as control devices. As mentioned above, according to the present invention, the arbitrary unlock code number can be changed only when the input signal of the key switch and the predetermined fixed code number match, resulting in high theft prevention. performance can be obtained. Furthermore, since there is no need to provide a complicated transmitting device within the key, a small and inexpensive optical operation control device can be obtained. Furthermore, according to the present invention, since a new code signal can be stored as appropriate, it is possible to significantly improve the anti-theft effect.

[Brief explanation of the drawing]

Fig. 1 is an operating circuit diagram of the optical operation control device according to the present invention, and Fig. 2 is a partial top view showing the state in which the key is inserted into the steering lock device. The jIS diagram is 90% compared to Figure 2.
Partial cross-sectional view after shifting by an angle of °. Figure Wi4 is a sectional view taken along line A-A in Figure 2, Figure 5 is a perspective view of the key, Figure 6 is a front view of the light guide member, and Figure 7 is the operating sequence of the control circuit shown in Figure 1. FIG. 8 is a block diagram showing the operation s1 control circuit. 11. ．． Light emitting device, 14-17. ．． light receiving sensor,
18. ．． Operation control circuit. 19. ．． Starter interconnect relay (controlled device). 77. ．． RAM (arbitrary unlocking code number storage means), 78. ．． ROM (
fixed code number storage means), 80-84. ．． key switch, 90. ．． Fixed code number comparison means. 91.
．． Timer means. 92. ．． Temporary storage means, 93. ．． New comparison means, 94. ．． Optional unlocking code number ratio means, patent applicant Kokusan Metal Industry Co., Ltd.

Claims (2)

[Claims] (1) It has an operation control circuit, a light receiving sensor and a plurality of key switches connected to the input terminal of the operation control circuit, and a controlled device and a light emitting device connected to the output terminal of the operation control circuit, and has an operation control circuit. The circuit stores a fixed code number and an optional unlocking code number, and compares the stored optional unlocking code number with the signal received by the light receiving sensor, and when they match, sends an output to the controlled device, and sends an output to the controlled device. After comparing the key switch input signal and the fixed code number and they match, the stored unlocking code number and the new unlocking code number received by the light sensor are compared, and if they do not match, a new unlocking is performed. An optical operation control device characterized by storing a code number. (2) The operation control circuit compares the fixed code number storage means that stores the fixed code number with the fixed code numbers stored in the plurality of key switches and the fixed code number storage means, and when they match, outputs a storage permission signal. fixed code number comparison means, timer means energized by the storage permission signal of the fixed code number comparison means, arbitrary unlocking code number storage means for storing the arbitrary unlocking code number, and arbitrary unlocking code number storage. arbitrary unlocking code number comparison means that compares the arbitrary unlocking code number stored in the means and the signal received by the light receiving sensor and sends an output to the controlled device when they match;
Temporary storage means for storing a new arbitrary unlock code number received by the light receiving sensor while the output of the timer means is being generated; Compare the new optional unlocking code number with the optional unlocking code number stored in the optional unlocking code number storage means, and if they do not match, select a new optional unlocking code number stored in the temporary storage means. 2. The optical operation control device according to claim 1, further comprising a new comparison means to be stored in an arbitrary unlocking code number storage means.