JPH0674693B2 - Electronic key system for vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic key system for a vehicle, which replaces a mechanical key for opening and locking the door of a vehicle such as an automobile, and more particularly to a mechanical key as well as a door. The present invention relates to a novel electronic key system for a vehicle, which can operate all operated elements such as a trunk, a glove box, an ignition switch, and the like, and has unique characteristics superior to those of a mechanical key and a conventional electronic key.

(Prior Art) FIGS. 29 to 31 show a type of vehicle electronic key system proposed recently, for example, in Japanese Patent Application No. 60-178669 (Japanese Patent Laid-Open No. 62-41878). 1 shows an unlocking device for a vehicle door.

FIG. 29 shows a transmission unit (130) carried by a driver of an automobile in this type of system, and the transmission unit (130) is provided on a casing (131) with a push button (A).
And a push button (B). Reference numeral (132) is an infrared light emitting element, and (133) is a monitor light emitting element such as a light emitting diode which emits visible light.

FIG. 30 is an electric system diagram of such a transmission unit (130). In the figure, the light emitting elements (132), (133) described above are shown.
(135) is a battery power source, (136) is a switch circuit of push buttons (A) and (B), and (137) is a start pulse signal and a key code signal and an operation code signal which will be described later. The signal generating circuit, (139) is a power line.

Here, the push button (A) of the transmission unit (130),
When either or both of (B) are pressed, the key code signal generating circuit (7) of the signal generating circuit (137) is pressed in either case.
0) is the key code signal (P
1) is generated following the start pulse. By transmitting this key code signal (P1), the key code signal generation circuit (70) generates a start signal (C) for the operation code signal generation circuit (71). The operation code signal generation circuit (71)
The operation code signal (P2) is formed according to the combination of the start signal (C) and the closing signals (a) and (b) of the push buttons (A) and (B). For example, the closing signal (a) operates the driver side door, the closing signal (b) operates the passenger side door, and the signals (a) and (b) simultaneously operate the trunk. Form a signal. Such start pulse, key code signal, and operation code signal are applied to the output circuits (74), (75) as a series of pulse signal trains (P3) via the OR gate (73). The output circuits (74) and (75) are respectively connected to the infrared light emitting element (13
2) and amplifying means for generating sufficient electric power to drive the monitor light emitting element (133). In this way, an optical signal (infrared ray) carrying a predetermined code signal according to the operation of the push buttons (A) and (B) is transmitted to the infrared light emitting element (13
This code signal is sent from 2) and can be visually confirmed by the monitor light emitting element (133).

FIG. 31 is an electric system diagram of a reception control unit (170) that receives the code signal of the transmission unit (130) on the automobile side and performs predetermined determination and control. According to the reception control unit (170), the infrared light receiving element (171) on the driver side or the infrared light receiving element (172) on the passenger side receives the optical signal from the transmitting unit (130) and immediately converts it into an electric signal. After conversion, it is input from each part of the automobile to the amplifier circuits (173) and (174) arranged at one place. This electric signal includes the above-mentioned key code signal and operation code signal, and whether the key code unique to the vehicle stored in the memory (178) matches this key code of the transmission unit (130). It is determined by the key code signal determination circuit (177). If they do not match, the operation code is not accepted and the door or trunk actuator does not operate. If they match, the output location determination circuit (175), the operation signal determination circuit (179), and the output logics of the door lock sensors (181) and (182) arranged on the doors are output to the output determination circuit (18).
0) makes a comprehensive judgment, and an actuator for opening and locking a predetermined door or trunk is driven via the output circuit (183).

(Problems to be Solved by the Invention) In the related art, a subkey means for limiting a drive target for unlocking and locking by using a mechanical key is known, but it is used as a subkey system in a vehicle electronic key system. I couldn't.

In order to solve such a problem, an object of the present invention is to provide an electronic key system for a vehicle provided with a sub key system that can be operated remotely.

(Means and Actions for Solving Problems) In order to achieve this object, according to the present invention, a main code and a sub code are provided by a pulse code signal that can be transmitted to a transmission unit, and the main control code is received by a reception control unit. It is determined whether or not the signal is different, and a control command specific to the main / sub code signal is formed. With such a configuration, it is possible to limit the change of the drive target depending on the main / sub key.

For example, in the electronic key system for a vehicle according to the embodiment of the present invention, the transmission unit (1) for transmitting a specific key code signal by a switch operation and the key code transmitted by the transmission unit (1) for the vehicle. A transmission control unit (1), comprising a reception control unit (2) for driving a desired drive target only when the key code matches the unique key code.
Is a key code signal generating means (370) for generating a key code signal by the switch operation, and a main / sub code signal generating means for generating a main code signal or a sub code signal in order to provide the transmission unit with main / sub. (372) and at least the key code signal output from the key code signal generating means (370) and the main code or sub code output from the main / sub code signal generating means (372) are converted into optical signals. First photoelectric conversion means (32), at least the key code signal generation means (370), the operation code signal generation means (371), and the main / sub code generation means (372).
And a power supply (34) for supplying electric energy for operating the photoelectric conversion means (32), and the reception control unit (2) includes the first photoelectric conversion of the transmission unit (1). A plurality of light receiving means (21) arranged at various places of the vehicle for receiving the optical signal given by the means (32).
To 25), an optical transmission means (4) for guiding the optical signal received by each of the light receiving means (21 to 25) to at least one place in the vehicle, and the optical transmission means (4). Second photoelectric conversion means (5) for converting the optical signal into an electric signal.
1), a memory (507) storing the key code unique to the vehicle, the key code stored in the memory (507) and the light receiving means (21 to 21) sent by the transmitting unit (1). 25), a key code signal determination means (506) for determining whether or not the key code signal obtained through the optical transmission means (4) and the second photoelectric conversion means (51) match. Operation code sent by the transmission unit (1) together with the key code signal and given through the light receiving means (21 to 25), the optical transmission means (4), and the second photoelectric conversion means (51). Operation code signal determining means (508) for determining the contents of the above, and the light receiving means (21 to 25) sent by the transmitting unit together with the key code signal, the optical transmission means (4), and the second photoelectric conversion. Means (5
A main / sub code signal determining means (509) for discriminating between main and sub codes given via 1), and one of the driving targets to be driven by the operation code signal and the main code signal or the sub code signal. And an output system means (540) for operating the driven object.

Still further, for example, according to the vehicle electronic key system of the embodiment of the present invention, the main / sub code determining means (50
In 9), all the controlled objects are activated by the main code signal, and the controlled objects are restricted by the sub code signal.

Furthermore, for example, according to the vehicle electronic key system according to the embodiment of the present invention, the main / sub code signal determining means (509) limits the unlocking of the glove box and the trunk by the sub code signal. Order.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the accompanying drawings.
In addition, in each figure, the same reference numerals denote the same objects.

FIG. 1 is a system diagram showing an overall configuration of an electronic key system for a vehicle according to an embodiment of the present invention, and FIG. 2 is a mounting diagram showing an example in which the electronic key system is mounted on an automobile.

In FIG. 1, FIG. 1 (a) shows a transmission unit (1) for transmitting a specific key code signal by operating a switch. For example, the driver of the vehicle carries this transmission unit (1). Further, FIG. 2B shows a reception control unit (hereinafter referred to as “load”) which receives an output signal of the transmission unit and drives a desired drive target (hereinafter, referred to as “load”) only when the code matches the key code unique to the vehicle. 2) is shown. The main control circuit (5) that performs the main arithmetic control of this unit (2) is arranged at the position (20) inside the dashboard of FIG. Further, FIG. 2C shows an operation panel (10) of the reception control unit (2) for performing various operations on the inside of the vehicle, near the dashboard or the instrument panel of FIG. Position of (2
Placed in 1).

Hereinafter, (1) the transmission unit (1), (2) the reception control unit (2), and (3) the operation panel will be sequentially described with reference to these drawings and the drawings starting from FIG.

(1) Transmission Unit FIG. 3 is an external view of the transmission unit according to the embodiment of the present invention, and FIG. 4 is an electric system diagram thereof. In both figures,
(30) is a casing of the transmission unit, (31) is an operation push button for instructing the automobile of a desired operation, and (32) is a first photoelectric conversion means for generating an optical signal carrying data for operation. Is an infrared light emitting element, (33) is a monitor light emitting element for monitoring the operating state of the transmitting unit, (34) is a rechargeable secondary battery DC power source, (3
5) is a diode for blocking current backflow, (36) is a switch circuit which forms the operation signal (a) by the push button (31), and (37) is various signals necessary for achieving the object of the present invention. The signal generating circuit to be formed, (38) is a solar battery for charging the power supply battery (34). As is clear from FIG. 4, the signal generation circuit (37) includes a key code signal generation circuit (370) and an operation code signal generation circuit (37).
1), main / sub code signal generation circuit (372), timer circuit (37
3), OR gate (374), 2 output circuits (375), (3
76) and a power supply voltage detection circuit (377). These will be described in detail below.

The key code signal generation circuit (37) uses a switch operation signal (a) generated when the push button (31) is pressed and the contact (31) of the switch circuit (36) is closed. (P1) is generated. This key code signal (P1) is, for example, a 16-bit code signal, and as shown in FIG.
One or two pulses are generated. Here, for example, the case of one pulse is assigned to the code “0”, and the case of two pulses is assigned to the code “1”. Therefore, the code in FIG. 5 is “11010 ...” from left to right. According to the key code signal generation circuit (370), such a 16-bit key code signal is transmitted once or several times, and the load to be operated is determined by the number of times of transmission. The number of times of sending is determined by the pressing time of the push button (31) and the output (d) of the timer (373) described later. It goes without saying that such a code determination method and the total number of bits may be arbitrary.

An operation code signal generation circuit (371) generates an operation code (P2) instructing the content of the operation requested of the load. This operation code signal (P2) is the key code signal generation circuit (37
0) is activated by an end signal (m) indicating that the transmission of the key code signal (P1) has ended, and is constituted by a 1-bit signal, for example. Similar to the key code signal (P1), the operation code signal (P2) assigns one pulse to code "0" and two pulses to each other as shown in FIG. Assign to code “1”. The output (P2) of the operation code signal generation circuit (371) is controlled by the output (d) of the timer circuit (373) described later. For example, when the output (d) is logic "0", P2 = 0 (first Figure 6 (a)),
When the output (d) is logic "1", P2 = 1 (Fig. 6 (b)).

The main / sub code signal generation circuit (372) is prepared, for example, by preparing a main unit and a sub unit in the transmission unit (1).
To set the main code and sub code corresponding to the main unit that can be driven by all the drive targets and the sub unit where the drive targets are limited, and to generate the main / sub code signal (P3) corresponding to the main unit or the sub unit. Constitute. For example, the main unit can open and lock all and operate panel keys, but the sub unit can only open and lock the door and operate the operation panel, and cannot open and lock the trunk and glove box. Therefore, it is possible to operate according to the main / sub of the conventional mechanical key. Therefore, the main / sub code signal (P3) is unique to the transmission unit. This main / sub code signal (P3) is generated by the operation code signal generation circuit (371).
It is activated by an end signal (n) indicating that the transmission of has been completed, and is composed of, for example, a 1-bit signal. This main / sub code signal (P3) is assigned to the code "0" in the case of one pulse, as shown in FIG. 7, just like the above-mentioned operation code signal (P2). The case is assigned to the code “1” so that the code “0” is the sub code and the code “1” is the main code.

As can be seen from the above, each signal generation circuit (370), (37
1), (372) output code signals (P1), (P2), (P
3) is sequentially transmitted through the OR gate (374), the output circuit (375), and the infrared light emitting element (32),
Therefore, the output transmission code (P0) of the transmission unit (1) is
As shown in FIG. In addition, each such circuit (37
0), (371), (372) are of the same kind, and the codes stored in the memory are used as signals (a), (d), (m),
(N) and the like can be configured to be read.

The timer circuit (373) starts counting when the contact of the push button (31) is closed, and when a certain time (TO) elapses in this closed state, the output level (d) is changed from "0" to "1". It will be converted to. Therefore, according to the embodiment of the present invention, when the duration (T) of the operation signal (a) is shorter than the set time (TO) of the timer circuit (373), the output d
= 0, and when the duration (T) of the operation signal (a) is longer than the set time (TO) of the timer circuit (373), the output d = 1.

FIG. 9 illustrates the above situation. The first push button operation time (T1) is shorter than the timer setting time (TO), and the second push button operation time (T2) is the timer setting time (T2). (TO) is longer than this. According to this example, the key code signal generation circuit (370) first generates the key code signal (P1) by the generation of the operation signal (a), and the timer circuit output (d) is converted into the logic "1". in case of,
A second key code signal (P1) is generated by the signal (d). Therefore, as shown in FIG. 9D, the operation code signal (P2) has the code "0" at the first time and the code "1" at the second time.

In the above description, each of the signals (a) and (d) has been described as a set signal for generating a code signal. However, the signal (a) is a start signal and the signal (d) is a frequency command. It is also possible to access the memory as a signal.

The power supply voltage detection circuit (377) is a kind of comparison circuit, which compares the voltage of the battery (34) with a predetermined reference value and generates an alarm signal (e) when the voltage becomes a certain voltage or less. It is a thing. With this alarm signal (e), for example, the output circuit (376) can be inactivated so that the monitor light emitting element (33) does not light up even if the push button (31) is operated.

The output circuits (375) and (376) generally include an amplifier circuit that obtains electric power for driving the light emitting elements (32) and (33), respectively.

Further, as is apparent from the above description, the monitor light emitting element (33) is lit while the code signal (PO) is generated, and indicates that the transmission unit (1) is operating normally. It is a thing. Therefore, the user can operate the keys when the monitor light emitting element (33) is lit,
It turns out that it is impossible when the light is off. The solar cell (38) is for charging the battery (34) as described above, and when the external light is present, the battery (34) is always charged, and when a general primary battery is used. Compared with this, the battery replacement period can be significantly extended. Note that this charging may be performed by a vehicle-mounted power source when the transmission unit is mounted in the slot of the operation panel described later.

(2) Reception control unit The reception control unit (2) is as shown in FIG.
The outline is also shown in FIG. The reception control unit (2) mainly includes an input system (50), a code signal determination system (500), an anti-theft circuit (520), and an output system (55).
It consists of 0). Hereinafter, these will be sequentially described.

The input system (50) receives the optical code signal sent from the above-mentioned transmission unit (1) and guides it to the operation system of the main controller (5). Therefore, the input system (50) according to this embodiment includes five light receiving lenses (21 to 25), optical fibers (4A to 4E) connected to the five light receiving lenses, an infrared light receiving element (51), an amplifier circuit (52), and A waveform shaping circuit (52) is provided.

The light receiving lenses (21 to 25) are arranged at the positions shown by the same numbers in FIG. 2, (21) is the light receiving lens in the operation panel (10) near the driver's seat, and (22) is the driver's seat. Light receiving lens located on the outside key part of the side door, (23) is located on the outside key part of the passenger side door, and (24) is usually located on the key part of the glove box in the front of the passenger seat The light receiving lens (25) is a light receiving lens arranged on a key portion outside the trunk door. One end of each of the optical fibers (4A to 4E) is connected to the light receiving lenses (21 to 25) of each part of the vehicle arranged in this way by a known method. Each optical fiber (4A-4E) is 1 in the dashboard
The optical code signal is guided as it is to the main control unit (5) arranged at the location. This optical code signal is sent to each optical fiber (4A-4
It is input to the infrared light receiving element (51-51) which is the corresponding second photoelectric conversion means of the main controller (5) via E) and is converted into an electric signal. Infrared receiver (51-5
The output electric signal of 1) is amplified by the amplification circuit (52-52) to the extent that it can be processed in the subsequent stage, and is restored by the pulse waveform shaping circuit (53-53) that is blunted or misaligned during transmission. .

The code signal judging system (500) judges the contents of the key code signal, the operation code signal, and the main / sub code signal from the signal restored by the waveform shaping circuit (53-53). Therefore, the code signal determination system (500) according to this embodiment includes an OR gate (501) and an AND gate (50).
2), vehicle speed sensor (503), vehicle speed determination circuit (504), AND gate (505), key code signal determination circuit (506), key code memory (507), operation code signal determination circuit (50
8), main / sub code signal determination circuit (509), and timer (51
0). Further, the code signal determination system (500) according to this embodiment is provided with a theft prevention circuit (520) including a mismatch counter (521), a timer (522), and an OR gate (523).

The code signal (S1) arriving via the input system (50) (substantially equal to the signal (P0) in FIG. 4) is input via the OR gate (501) to one input of the AND gate (502). Has become. The other input of the AND gate (502) is the output signal (S2) of the vehicle speed determination circuit (504). The vehicle speed determination circuit (504) is a vehicle speed sensor (503) such as a generator.
Based on the output signal (S) of the above, the logic "1" is output when the vehicle is stopped and the vehicle speed is "0", and the logic "0" is output in other cases, that is, when the vehicle is moving even slightly. Is output. Therefore, according to the embodiment of the present invention described by the positive logic, the code signal (S1) indicates that the vehicle is stopped and the vehicle speed determination circuit (504) is detected.
Only when the output signal S2 of 1 is input to each code signal determination circuit (506), (508), (509). As described later, the anti-theft circuit (52) of the AND gate (505).
The code signal (S1) normally passes through the AND gate (505) because the input coming from 0) is generally a logical "1".

The key code signal determination circuit (506) determines whether the key code signal (P1) of the transmission unit (1) and the key code stored in the key code memory (507) of the reception control unit (2) match. To do. For example, this key code signal determination circuit (506) is a counter for detecting the first 16 bits of a series of code signals (S1) (generally, a start pulse for signal detection is added first). , A register for storing this, and a flag register for comparing the contents of this register with the contents of the key code memory (507) to determine whether they match or not, and the like. The key code signal determination circuit (506) outputs a match signal (p) when both key codes match, and outputs a mismatch signal (q) when both key codes do not match. Match signal (p)
Is a start signal of the operation code signal determination circuit (508).

The anti-theft circuit (520) that operates with the mismatch signal (q)
Every time this disagreement signal (q) is generated, a counter (52
The content of 1) is incremented by one. Further, for example, when the count value becomes 10, the output signal (g) is set to logic "1". The counter (521) has a reset input (i), and the key code signal determination circuit (506).
Forms a coincidence signal (p), or when the output (h) of the timer (522) described later becomes a logic "1", the counter (521) is reset via the OR gate (523). Such a counter (521) has finished counting,
When the output signal (g) of logic "1" is generated, the timer (52
2) is started and this timer (52
The output (h) of 2) is logic "0" for a certain time (for example, 30 seconds).
And As a result, one input of the AND gate (505) becomes "0" for a certain period of time, and the passage of the code signal (S1) is blocked.

According to such an anti-theft circuit (520), if a key code other than the key code unique to the car is input 10 times in a row, for example, the key code signal is not judged for 1 minute, and the key code is not found. Takes a considerable amount of time, making theft of a car extremely difficult.

The operation code signal judgment circuit (508) judges whether the content of the operation code is "1" or "0", and each of the output judgment circuits (541), (542), (544), (545) which will be described later. To be transmitted to. This operation code signal determination circuit (508) is
For example, it can be configured by combining with a level determination circuit a timer which is activated by the coincidence signal (p) and operates only while the 17th bit signal is present. When this timer finishes counting, the operation code signal determination circuit (508)
Sends an end signal (r). This end signal (r) is
It is a start signal for the main / sub code signal determination circuit (509).

The main / sub code signal determination circuit (509) determines whether the content of the main / sub code is "1" or "0". If this is "1", it is the main code, so all output judgment circuits (54
Ensure that 1), (542), (544) and (545) are operational. On the contrary, when it is “0”, it is a sub code, so that the operation panel output determination circuit (541), the glove box output determination circuit (544), and the trunk are operated so that the parts other than the trunk and the glove box are activated. A command is issued to block the operation of the output determination circuit (545). This main / sub code signal judging circuit (509) can be configured by combining a timer, which is activated by the end signal (r) and operates only while the signal of the 18th bit is present, with the level judging circuit. . When this timer finishes counting, the main / sub code signal determination circuit (509) sends a code determination end signal (t). This code determination end signal (t)
Is given to each output determination circuit (541), (542), (544), (545) after being delayed by a timer (510) for a fixed time.

Next, the output system (540) will be described. Output system (540)
Is based on each output command signal (u), (v), (w) of the code signal determination system (500), which load and which output determination circuit (541), (542), (544), ( Five
45) It decides whether to operate, and it makes the desired operation. The steering lock output determination circuit (54
6) cooperates with the operation panel output determination circuit (541) as described later, and is slightly different from other output determination circuits.
Therefore, the output system (540) according to this embodiment has an input location determination circuit (530) that determines which output determination circuit is to be activated based on the content of the code signal (S1), and an operation panel (10) described later. An operation panel output determination circuit (541) that responds to the operation state, a door output determination circuit (542) that determines and controls the door open / locked state, and a glove box output determination circuit (54) that determines and controls the open / locked state of the glove box.
4), trunk output judging circuit (545) for judging and controlling the opened / locked state of the trunk, and steering lock output judgment circuit (54) for judging and controlling the opened / locked state of the steering wheel.
6) equipped.

The input location determination circuit (530) is for identifying the drive target as described above and for preventing the output operation when there is an input from two or more locations. Therefore, the input location determination circuit (530) determines the presence or absence of a code signal from each key portion (21 to 25) at each input terminal (k1 to k5), and outputs terminals (1 to 5) accordingly. ) Is determined, and a command signal of logic "1" is sent to the output determination circuit to be driven, which can be configured as a logic circuit (for example, ROM). The configuration of such a logic circuit is, for example, the 11th
As shown in the figure. In this case, for example, if the transmission unit is operated to unlock the driver side door, the input logic (k1 to k5) of the input location determination circuit (530) is (0100
0). At this time, the output logic (1 to 5) is (010
00). Therefore, only the door output determination circuit (542) to which the output logic "1" is input operates. Similarly, the other output determination circuits also operate. For the logic inputs other than those shown in FIG. 11, the output (1-5) of the input location determination circuit (530) is (00000), and none of the output determination circuits operate.

The operation panel output determination circuit (542) and the steering lock output determination circuit (546) will be described together with the operation of the operation panel described later.

The door output determination circuit (541) is an output signal (u) of the operation code signal determination circuit (508) and a code signal determination system (500).
End signal (w), output signal (2) or (3) of the input location determination circuit (530), output signal (DL1) of the door lock sensor (560) on the driver side, and door lock on the passenger side Based on the output signal (DL2) of the sensor (561), a predetermined one of the drive circuits (562 to 565) is operated, and the corresponding actuator (566) or (568) and buzzer (56).
Activate 7) or (569).

Here, the output signal (u) of the operation code signal determination circuit (508) is an operation command to the driver side door when the logic is "0", and an operation to the passenger side door when the logic is "1". Suppose it is a command. In addition, each door lock sensor (560),
As for the output signals (DL1) and (DL2) of (561), it is assumed that the logic "0" detects the unlocked state and the logic "1" detects the locked state.

Door output judgment circuit (542) to execute the above operation
Is, for example, a logic circuit (eg ROM) as shown in FIG.
Can be configured as. That is, for example, (#
As shown in the logical row of 1), when the doors on the driver's side and the passenger's side are in the unlocked state, the door lock sensor (560),
(561) sets the logic of the output signals (DL1) and (DL2) to "0". In this state, the light receiving lens (2
2) receives the code signal and the operation code signal (u) is "0" (immediately after the push button (31) is pressed), the door output determination circuit (541) operates via the drive circuit (562). The seat side door lock actuator (566) is operated to lock the door. At this time, in order to indicate that the door is locked, the door output determination circuit (542)
At the same time, the drive circuit (563) is activated and the buzzer (567) sounds. The sound of the buzzer (567) is distinguished so that it can be discriminated whether it is locked or unlocked. For example, as shown in the figure, the buzzer sounds once when locking and twice when unlocking. In this case, apart from locking and unlocking, the pitch, pitch, and sound quality may be changed, one may be a long tone and the other may be a short tone, and a combination of a continuous tone and an intermittent tone may be used.

From the state described above, when the push button (31) is further pressed and the operation code signal (u) is converted to logic "1", the passenger door is locked, as shown in the same figure (# 7). Thus, the door output determination circuit (542) operates. It will be readily appreciated that in this case the drive circuits (564), (565) are activated and the actuator (568) and buzzer (569) are energized. Thereafter, in the same manner, one or both of the driver seat side door and the passenger seat side door are unlocked or locked. Of course, the same is true even if the number of doors is further increased.

The glove box output determination circuit (504) and the trunk output determination circuit (545) can have the same configuration. That is, the glove box output determination circuit (544) has a glove box lock sensor (571) instead of the door lock sensors (560) and (561), and
Drive circuits (572), (573) with the logical configuration shown in Fig. 3.
Actuates the actuator (574) and buzzer (575)
Energize and open and lock the glove box. Further, the trunk output determination circuit (545) includes a door lock sensor (56
0), (561) instead of trunk clock sensor (581)
And has a drive circuit (58
2) is activated, the actuator (584) is urged, and the trunk is unlocked and locked.

(3) Operation panel The operation panel (10) allows the mechanical key to perform functions such as steering lock release, electric system switch operation, and ignition switch operation by inserting the transmission unit (1) into the slot. It is intended to have the same or higher function.

The appearance of the operation panel (10) is also shown in Fig. 1, and Figs. 15 and 16 show the details. That is, Fig. 15 is a front view of the operation panel (10), and Fig. 16 (a), (b),
(C) is a sectional view taken along line XX, YY, and ZZ of FIG. 15, respectively.

On the panel surface (150) of the operation panel (10), a slot (151) for inserting the transmitting unit (1), an eject lever (152) for taking out the inserted and fixed transmitting unit (1), an engine start A start button (153) for performing cranking, an ignition circuit (154) for simultaneously turning on an ignition circuit (not shown) for engine ignition and an accessory circuit for operating an electric system such as a radio, An accessory button that turns on only the accessory circuit, an off button that turns off both the ignition circuit and the accessory circuit, and a glove box button for opening and locking the glove box, trunk, and doors inside the vehicle (15
7), trunk button (158), and door button (15)
9) are arranged. Further, the buttons (157 to 159) have light emitting diodes (225), (230), (23
2) is provided.

The insertion slot (151) of the transmission unit (1) has a shape complementary to that of the transmission unit (1).
With the operation button (31) on the left side of the drawing, insert the slot (15
1) Insert it. When this insertion is completed, the light emitting element (32) of the transmission unit (1) faces the light receiving lens (21) provided on the rear portion of the operation panel. The light receiving lens (21) constitutes a light receiving means together with the optical fiber (4A) joined to the light receiving lens (21), and guides the optical code signal to the main controller (5) of the reception control unit (2).

The eject lever (152) has a substantially L-shaped cross section, and a rotation shaft (152a) is provided in the longitudinal portion of the L-shaped member, and the lever (152) can rotate with this shaft (152a). Is. In addition, a long hole (152
b) is formed and the plunger (160) described next
Is designed to be inserted. One end of the slider pin (152e) is in contact with the short portion (152d) of the L-shaped member. The slider pin (152e) is a substantially U-shaped member having a short side as shown in FIG. 16 (b). Also,
This slider pin (152e) is attached to the pressure spring (152f).
Is biased from above to below. Therefore, when the transmission unit (1) is inserted into the slot (151) against the spring (169) at the rear of the operation panel, the recess (100) previously formed in the transmission unit (1).
The tip of the slider pin (152e) engages with (Fig. 15),
The transmission unit (1) is temporarily fixed.

As described above, the set switch (551) is provided inside the operation panel so that the operation button (31) is pressed at the position where the primary fixing by the eject lever (152) is completed. The output of this set switch (551) is
As shown in FIG. 10, the operation panel output determination circuit (541)
Has been entered in. The set switch (551) is a protruding member that is biased toward the operation button (31) by the spring (551b) arranged in the inner recess. Further, a contact (551c) is fixed to the inner concave portion of the projecting member and cooperates with the contact (551d) fixed to the other part of the panel to form a switch. That is, when the transmitting unit (1) is inserted, the operation button (31) of the transmitting unit (1) is inserted into the protruding member (551a).
Abut on the operation button (31) and the self-confidence is pressed,
The protruding member (551a) is also pressed against the spring (551b), and the two contacts (551c) and (551d) come into contact with each other.
In this way, the set switch (551) is turned on (theory "1"), and the infrared light emitting element (32) is caused to emit light. This infrared ray gives a signal to the operation panel output determination circuit (541) through the optical fiber (4A), but also drives the plunger (160). That is, the set switch (54
When 1) is turned on, the solenoid (163) is excited to attract the magnetic core (161) fixed to the plunger (160) against the spring (162). For this reason,
As shown in the figure, the plunger (160) enters the elongated hole (152b) of the lever (152), and the fixing of the transmission unit (1) is completed. As is clear from the above description, when the eject lever (152) is pushed downward, the slider pin (152e) is slightly raised due to the action of the elongated hole (152b). For this reason,
The transmission unit (1) is pushed a little forward by the spring (169), the contact state between the operation button (31) and the set switch (551) is released, and the switch (551) is turned off. As a result, the solenoid (163) is deenergized, and the plunger (160) is pulled out from the elongated hole (152b) by the action of the spring (162). Therefore, the slider pin (152e) is completely disengaged, and the transmission unit (1) is operated by the spring (169) by the operation panel (1).
It will be possible to take it out from 0).

Next, the configuration and operation of the control panel (10) and the control system of the main control unit (5) related to the operation panel (10) will be described in Section 10.
This will be described with reference to the drawings and FIGS. 17 to 20.

First, the operation panel output determination circuit (541) described above includes the signals (u), (v) from the code signal determination system (500),
(W) and the output signal of the input location determination circuit (530) (
In addition to 1), the output signal of the set switch (551) is input, and it is determined whether or not each operation button of the operation panel (10) can be operated based on these signals,
Command signals (CC1) and (CC2) are sent to the panel operation control unit (554) via the output circuits (552) and (553). The signals (CC1) and (CC2) are output when the code signal determination end signal (w) is changed from the logic "0" to the logic "1". When the signals (CC1) and (CC2) are both logic "1", the panel operation control unit (554) can operate all buttons on the operation panel, and when CC1 = 1 and CC2 = 0, Buttons other than the trunk and glove box can be operated.

For this reason, this operation panel output determination circuit (541)
It is possible to have a logical configuration as shown in FIG. For example, when the main transmission unit (1) is inserted and set in the slot (151) of the operation panel (10) as described above, as shown in the logical column (# 1) of the drawing, the set switch (551) causes the logical " 1 ”is on. At this time, the reception control unit (2) has the light receiving means (21), (4A) at the rear of the operation panel.
The operation panel output determination circuit (541) outputs the key code determination end output signal (CC1) to logic "1", the main / sub code signal determination output, by receiving the optical code signal of the operation code "0" and the main code "1". The signal is output as logic "1". Further, as shown in the logical column (# 3), when the transmission unit (1) is set on the operation panel (10), the set switch (551) remains pressed, so the operation code becomes the logical "1". Change (of course, at this time, the main / sub code remains "1"). That is, once the transmission unit (1) is set on the operation panel (10), the outputs (CC1) and (CC2) of the operation panel output determination circuit (541) do not change.

Further, as shown in the logical column (# 2), when the transmission unit (1) is set on the operation panel, the set switch (551) is turned on, and the operation code "0" and the main / sub code "0" are displayed on the operation panel. Is received. Therefore, the outputs CC1 = 1 and CC2 = 0. When this state continues, the operation code changes to logic "1" and is shown in the logic column (# 4) and the output signal of the operation panel output determination circuit (541) is the same as in the case of (# 3) described above. It is fixed at CC1 = 1 and CC2 = 0.

As described above, when either the main or sub transmission unit is set, the output determination circuit (541) holds the state of (# 3) or (# 4), and the set switch is turned on in (# 9). The state of outputting a logical "0", that is, this state is held until the transmitting unit is taken out. Of course, after taking out the transmission unit (1), the state of (# 9) is maintained.

When the transmission unit is not set on the operation panel and an optical signal is input from the operation panel portion, CC1 = 0 and CC2 = 0 as shown in the logical columns (# 5 to # 8).
That is, it is determined that the optical signal in this case is not a normal signal by the transmission unit, and the occurrence of a malfunction such that the panel operation control unit (554) can be operated is prevented.

FIG. 18 shows an outline of a panel operation control section (554) operated by such an operation panel output determination circuit (541), and there is also a part overlapping with FIG. 1 or FIG.
The configuration of the operation panel and the steering lock will be described with reference to this drawing.

In FIG. 18, the switch circuit (201) is turned on by the operation panel output determination circuit (541) that outputs the output command signal CC1 = 1 indicating that the key code signals match each other. All the operation buttons (153 to 159) of the operation panel (10) can be operated. The switch circuit (202) is a circuit that is turned on and off by a command signal (CC2) that outputs another of the main and sub code signals by the operation panel output determination circuit (541). It is turned off by "0" to prevent the glove box button (157) and the trunk button (158) from operating in the sub transmission unit. However, in the following description, it is assumed that all the operation buttons on the operation panel can be operated by the main transmission unit. Switch circuit (203)
Is driven by the output signal of the vehicle speed calculation circuit (504),
Switches (154), (155), (156), other than the start switch (153) and glove box button (157),
(158) and (159) are to be operable only when the vehicle is stopped. The switch circuit (204) is driven by the output of the engine rotation calculation circuit (260) and the steering unlocking condition, and enables operation of a start switch (153) for executing cranking described later. To do.

When the start button (153) is operated, the timer (205) is started, and the set time (for example, 5 seconds) of the timer (205) is set via the AND gate (206), the control circuit (210), and the output circuit (220). ) Only drives the ignition circuit (221) and the starter motor (222), and at this time the accessory circuit does not drive and enters the cranking state. When the engine is started by this cranking, one input of the AND gate (206) becomes "0" based on the output of the engine rotation calculation circuit (260), so that the control circuit (210) and the output circuit (220) are turned on. Via this, the starter motor (222) is deactivated. In addition, the accessory circuit (223) is also connected to the control circuit (21
Return via 0). If the engine does not start,
The ignition switch (154) and the accessory switch (155) are restored and stand by until the next start button (153) is operated. The above operation is the same when the engine is stopped during traveling and the engine is restarted even in the traveling state.

When the engine is started by the operation of the start button (153) as described above and the vehicle is in the traveling state, the output of the vehicle speed calculation circuit (504) becomes a logic "0", so the switch circuit (203) is in the off state. Become. Therefore, the switch circuit (203) interrupts the button operation inputs of the ignition, accessory, off, trunk, and door, and prohibits engine stoppage, traction, and door opening / closing. That is,
When the engine is stopped during running, a recent power assist type operation mechanism (brake, clutch, accelerator, etc.) may be dangerous, and according to this embodiment, it is impossible to stop the engine during running in this way. Enables and avoids this danger. In addition, it is not possible to open and close the door and trunk while driving, and it is also dangerous because it is dangerous. At this time, glove box button (15
The signal of 7) is not input to the switch circuit (203) but passes through the switch circuits (201) and (202) to the control circuit (209).
Can be entered in. Therefore, the glove box can be opened and locked regardless of the traveling state by the operation of the output circuit (220) and the actuator (574). When the glove box is unlocked, the light emitting diode (23
0) is turned on.

Accessory button (155) and ignition button (15
4) serves as inputs (R1) and (R2) of the latch circuit (207) through the switch circuits (201) and (203). The two outputs (R3) and (R4) of the latch circuit (207) are input (G) to the control circuit (210) via the OR gate (208), and one output (R3) is directly controlled. Circuit (21
It is an input (F) of 0). In addition, the off button (15
Similarly, 6) is connected to the clear input (CL) of the latch circuit (207) via the switch circuits (201) and (203). In such a latch circuit (207), once the ignition button (154) or the accessory button (155) is operated, the ignition circuit (221) is operated until the off button (156) is operated without pressing the button. Is kept on or the accessory circuit (223) is kept on. The ignition button (154) simultaneously turns on the ignition circuit (221) and the accessory circuit (223) by operating the button after the engine is stopped. The accessory button (155) allows you to access the accessory circuit (22) provided the engine is stopped.
Turn on 3).

Glove Box Button (157), Trunk Button (15
8) and the door button (159) are all unlocked and locked by the respective actuators (574), (584), (568), except that the trunk button (158) is the same as the mechanical key. It has only the unlocking function. Further, each button (157 to 159) has a light emitting diode (230), (225), (232) indicating an unlocked state.

The driving of the load by operating the operation buttons on the operation panel (10) is performed by the control circuit (21) as described above.
0). This control circuit (209), (21
FIG. 19 shows the operation logic of 0) in terms of the relationship between button operation, input / output logic, and load operation. In addition, "-"
The sign indicates that the input is independent of the output.

Steering lock output judgment circuit (546) (Fig. 10)
Is included in a part of the control circuit (209), the transmission unit is set on the operation panel (10), and the output signal (CC1) of the operation panel output determination circuit (541) is logic "1".
It operates on the precondition that it is. The other condition signals are shown as the output signal of the engine rotation calculation circuit (260) and the steering lock and unlock position switches (211) and (212) (in FIG. 10, the position switch (591)). It is an output signal of. The output of the engine rotation calculation circuit (260) drives the switch circuit (204) via the AND gate (261) together with the output signal of the steering unlock-position switch (212). Based on such a signal, a state in which the steering lock actuator (593) operates is shown by the inputs (I4 to I7) and the output (O) of the control circuit (209).
Fig. 20 is shown together with 4), (O5), and (O10).

For example, when the transmission unit (1) is set on the operation panel (10) in an automobile with the steering wheel locked, the operation panel output determination circuit (541) (Fig. 10) is activated by the set switch (551), Control circuits (209)
The input (I5) of is set to logic "1". As a result, if the transmission unit (1) is a regular main unit, CC1 = 1, and the input (I4) of the control circuit (209) becomes logic "1". Further, as described above, since the steering is locked, the position switch (211) is closed, and the input (I6) of the control circuit (209) is set to logic "1".
Therefore, as shown in the logic column (# 1) in FIG. 20, the outputs (O5) and (O10) of the control circuit (209) become logic "1", and the steering lock actuator is output via the output circuit (220). Energize (593) to prompt unlocking of the steering wheel. The operation when different types of transmitter units are set is
It is as shown in the logical column (# 4).

By the way, generally, in the steering lock using a mechanical key, the lock pin and the recess of the steering shaft are engaged with each other by turning the steering wheel at a predetermined angle after the engine is stopped, and the lock state is achieved. At the time of unlocking in this case, the lock pin and the steering shaft receive a frictional force in the direction of rotation of the steering wheel, so that the steering wheel cannot be unlocked unless the steering wheel is returned to the locked position.
Such a state is the same as in the electronic key of the present invention (in the case of # 1 and # 2), and even if the actuator (593) operates in the unlocking direction, it may not be possible to unlock by itself. In this case, the unlock signal is output from the control circuit (209) (O
Although it is sent from 5), the lock pin is not returned. Confirm this with the input (I7) and output the alarm (O1
0) is a logical "1". This allows the output circuit (2
A buzzer (233) is sounded via 20) to warn that the steering has not been unlocked yet. The same applies when the lock pin does not work due to an abnormal connection to the actuator (593).

In the cases of (# 1) and (# 2) above, the output logic of the AND gate (261) is "1", and the switch circuit (20
Since 4) is off, no signal is input to the control circuit (210) even if the start button (153) is pressed, and the engine will not start. Therefore, it is possible to avoid the risk of starting the steering lock when the steering lock is unlocked or incompletely unlocked.

Similarly to the above, the logical row (# 3) shows the case of complete unlocking, and the logical row (# 5) shows the case of locking.

21 and 28 show all of the above operations in a unified manner. 22 to 27 show the subroutine in FIG. 21. Each subroutine is shown as "SUB1".

The present invention is not limited to the above embodiments and modifications, and various other embodiments and modifications are possible within the technical scope of the present invention, and equivalent components can be replaced. It is obvious to a person skilled in the art that it is possible. For example, the reception control unit may be provided not only at one place but also at a plurality of places according to functions.

(Effect of the Invention) According to the present invention, as described above, the pulse code transmitted by the transmission unit includes the code signal indicating the main / sub, and the reception control means determines and controls the other. By adding or removing restrictions to objects, it is possible to obtain an electronic key system for a vehicle, which has applicability more than that of a mechanical key and has a simple structure in consideration of the use by others. it can. For example, according to the electronic key system of the present invention, the sub-transmission unit is handed over when the key is handed to another person, such as when the car is deposited at a repair shop or when a hotel boy is requested to park the car. This has the advantage of avoiding careless disputes.

[Brief description of drawings]

FIG. 1 is an overall system diagram of an electronic key system for a vehicle according to an embodiment of the present invention, FIG. 2 is a mounting diagram of an electronic key system for a vehicle according to an embodiment of the present invention on an automobile, and FIG. FIG. 4 is an external view of a transmission unit of the vehicle electronic key system according to the embodiment of the present invention, FIG. 4 is an electric system diagram of the transmission unit of the vehicle electronic key system of the embodiment of the present invention, and FIGS. FIG. 10 is an operation explanatory view of the transmission unit of the vehicle electronic key system according to the embodiment of the invention, FIG. 10 is a system diagram of the reception control unit of the vehicle electronic key system according to the embodiment of the invention, and FIGS. 11 to 14 Is a block diagram or an operation explanatory view of a main part of a reception control unit of a vehicle electronic key system according to an embodiment of the present invention, and FIGS. 15 and 16 are reception of the vehicle electronic key system according to the embodiment of the present invention. The structure of the operation panel of the control unit 17 is a configuration diagram showing the structure, FIG. 17 is an operation explanatory view of the operation panel of the vehicle electronic key system according to the embodiment of the present invention, and FIG. 18 is an operation panel control of the vehicle electronic key system according to the embodiment of the present invention. Fig. 19 is a system diagram showing the configuration of the parts, Fig. 19 and Fig. 20 are operation explanatory views of the operation panel control part of the vehicle electronic key system according to the embodiment of the invention.
21 to 28 are flowcharts showing the overall operation of the electronic key system for a vehicle according to the embodiment of the present invention, and FIGS. 29 to 31 are explanatory views of the conventional device. In the drawing, (1) is a transmission unit, (2) is a reception control unit, (3) is a light receiving means, (4) is an optical transmission means,
(5) is a main controller, (9) is a controlled object, (10) is an operation panel, (31) is an operation button, (32) is a first photoelectric conversion means, (33) is a monitor light emitting means, ( 34) is the power supply, (3
8) is a solar cell. (370) is a key code signal generating means, (371) is an operation code signal generating means, and (372) is a main / sub code signal generating means. (506) is a key code signal judging means, (507) is a key code memory, (508) is an operation code signal judging means, (509)
Is a main / sub code signal determining means, (530) is an input location determining means, and (540) is an output system.

Claims (3)

[Claims] 1. A transmission unit for transmitting a specific key code signal by a switch operation, and a reception control unit for driving an object to be driven only when the key code transmitted by the transmission unit matches a key code unique to a vehicle. In the electronic key system for a vehicle, including: the transmission unit, a key code signal generating means for generating a key code signal by operating a button switch, and a main code signal or a sub code for providing the transmission unit with a main / sub Main / sub code signal generating means for generating a signal, at least the key code signal which is an output of the key code signal generating means, and a main code or a sub code which is an output signal of the main / sub code signal generating means is converted into an optical signal. First photoelectric conversion means, at least the key code signal generation means, and the main / sub code generation means And a power supply for supplying electric energy for operating the photoelectric conversion means, and the reception control unit includes the first unit of the transmission unit.
A plurality of light receiving means arranged at various places of the vehicle for receiving an optical signal given by the photoelectric converting means, a second photoelectric converting means for converting the optical signal into an electric signal, and the key code unique to the vehicle. Whether or not the key code signal stored in the memory, the key code stored in the memory, and the key code signal sent from the transmission unit and obtained through the light receiving unit and the second photoelectric conversion unit match. Key code signal determining means for determining whether the main / sub code signal is transmitted from the transmitting unit together with the key code signal and is provided via the light receiving means and the second photoelectric conversion means. An electronic key for a vehicle, comprising: a discriminating means and an output means for specifying a drive target to be driven among the drive targets based on the main code signal or the sub code signal. Stem. 2. The electronic key system for a vehicle according to claim 1, wherein the main / sub code determining means actuates all the drive objects by the main code, and selects the drive objects by the sub code signal. An electronic key system for a vehicle, which is characterized by instructing to limit. 3. An electronic key system for a vehicle according to claim 2, wherein the main / sub code determining means gives an instruction to limit unlocking of a glove box and a trunk by the sub code signal. Characteristic vehicle electronic key system.