JP3960179B2 - OBE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an in-vehicle device that performs alarm processing when a driver forgets to remove an IC card at the end of driving in an in-vehicle device that is used by inserting and removing an IC card, for example, an in-vehicle device that is used in an automatic toll collection system on a toll road. It is about a vessel.
[0002]
[Prior art]
A conventional vehicle-mounted device uses the following solution in order to prevent the IC card from being left in a state where it is mounted.
That is, this vehicle-mounted device has an interface for mounting an IC card, and the presence or absence of the IC card is detected by the IC card detection unit. The engine drive device is detected to be stopped by the drive device state detection unit. The driver detection unit detects the presence of the driver, and the vehicle state detection unit detects the on / off state of the IG switch, the open / closed state of the door, and the like. The control circuit performs a notification operation by detecting the remaining state of the IC card when the user stops the driving device according to the control program. The notification operation is stopped when it is extracted, when the stop switch is turned on, or when time elapses. As a result, the user can reliably recognize the remaining state of the IC card. (For example, refer to Patent Document 1).
[0003]
Another vehicle-mounted device can eliminate the user from forgetting to remove the IC card, and uses the following solution to improve the operability and display effect at the time of insertion.
In other words, when the application processing unit receives a drop in power supply from the power supply control unit, the in-vehicle device verifies the insertion / extraction information from the IC card control unit, and controls the warning if an IC card is inserted. Send warning information to the department. Further, the power source for ACC and the power source for + B are used as the power source, and after the power source for ACC is turned off, the application processing unit performs warning processing for the user using the power source for + B, and + B after the end of the warning. In some cases, the power is turned off so that a warning of forgetting to remove the IC card can be surely performed after the power is turned off (see, for example, Patent Document 2).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-39438 (5th and 6th pages, FIG. 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 2001-14500 (page 3, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in the conventional vehicle-mounted device, after the driver turns off the engine lock at the end of driving, in the situation where the driver forgets to remove the card from the vehicle-mounted device, the vehicle-mounted device detects that the card has been forgotten to be removed, and some warning is given. Although it is output, the response program processing for this type of alarm is positioned as an emergency response, and places an extra load on the steady application program processing related to toll collection in the OBE. There was a problem.
[0006]
The present invention has been made to solve such a problem, and provides an in-vehicle device in which a processing processor for an emergency is separately provided to reduce the processing load of a steady application program on the host CPU side. With the goal.
[0007]
[Means for Solving the Problems]
The vehicle-mounted device according to the first invention operates by receiving power supply from the storage battery via an engine switch linked to the engine lock, and detects the card insertion / removal state in the vehicle-mounted device in which the card can be inserted / removed. A card read / write unit for reading / writing access to the card based on control from the CPU, a capacitor connected to the engine switch via a diode, and a voltage drop detection circuit for detecting a voltage drop of the input power source taken from the storage battery And a microprocessor unit that inputs a detection signal for card insertion / removal status, and outputs warning information for forgetting to remove a card by a voltage drop signal for a voltage drop detection circuit, and an alarm for generating an alarm for forgetting to remove the card And the user operates the engine lock in a disconnected state, the voltage drop detection circuit detects the voltage drop of the input power supply, and the card is When the mounting state to de reading out portion, while the capacitor holds a charge, it is obtained so as to output the alarm information of forgetting to pull out the card.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of the first embodiment according to the present invention.
In the figure, 1 is a vehicle-mounted device, 2 is a card, 3 is an engine lock, 4 is a key, 5 is an engine switch that is turned on (ON) and off (OFF) by a key built in the engine lock 3, and 6 is lead A storage battery, such as a storage battery, is actually connected to an electrical system (not shown) such as a power generation system, ignition system, and lighting system of an automobile.
Also, 7 is an antenna, 8 is a wireless transmission / reception circuit, 9 is an encryption / decryption authentication circuit, 10 is a display / input circuit, 11 is a card read / write unit for reading and writing to the card 2, 12 is a host CPU, and 13 is stable. 14 is an in-vehicle device processing unit including an antenna 7, a wireless transmission / reception circuit 8, an encryption / decryption authentication circuit 9, a display / input circuit 10, and a card read / write unit 11.
15 is a diode for preventing backflow, 16 is a capacitor for accumulating electric energy from the storage battery 6, 17 is a voltage drop detection circuit for generating a predetermined signal when the voltage of the input power source is lower than a predetermined value, 18 is a host CPU 12 A processor for performing individual processing different from the above, 19 for issuing a warning, for example, an alarm code storing voice data in the processor 18, 20 for a digital / analog conversion circuit (hereinafter referred to as a D / A conversion circuit), and 21 for a magnetism An alarm generator for reporting an alarm, such as a loudspeaker or piezoelectric element speaker, 22 is a microprocessor unit including a processor 18, an alarm code 19, and a D / A conversion circuit 20, and 23 is for backflow prevention. This is a forgotten card removal notification module including a diode 15, a capacitor 16, a voltage drop detection circuit 17, a processor 18, a warning code 19, a D / A conversion circuit 20, and a warning generator 21.
Reference numeral 24 denotes a power supply line (hereinafter referred to as a first control input line) for supplying the input power of the storage battery 6 to the stabilized power supply circuit 13 and the voltage drop detection circuit 17. Reference numeral 25 denotes a power supply line 24 via a diode 15 to remove a card. The power supply line supplies power to each part of the forget-notification module 23.
The vehicle-mounted device 1 takes a form in which power is supplied from the stabilized power supply circuit 13 to each interior of the vehicle-mounted device 1 as a whole.
[0009]
When the voltage drop detection circuit 17 detects a voltage drop and detects that the engine lock 3 is in a disconnected state, the processor 18 detects a push switch 34 that detects whether or not the card 2 is inserted in the card read / write unit 11. (Described later) Signal line A of the card detection signal line that is the contact signal of (Described later) Read the status. At this time, if the card 2 is inserted, for example, voice alarm data is read from the alarm code 19, and the card 2 remains inserted from the alarm generator 21 via the D / A conversion circuit 20 and ejected. Raise a message alert.
[0010]
FIG. 2 is a diagram showing details of the structure of the card read / write unit 11 according to the first embodiment.
2A is a diagram showing a state when the card 2 is not inserted into the card reading / writing unit 11 or when it is ejected, and FIG. 2B is a diagram when the card 2 reads the card. It is a figure which shows a state when it is inserted in the punching part.
Here, 26 is a front surface when the driver accesses the card reading / writing unit 11, 27 is a back surface, 28 is an upper surface, 29 is a bottom surface, 30 is a physical detection of insertion / extraction of the card 2, A card detection adapter having a notch in the card, 31 is a spring A that supports the card detection adapter 30 on the bottom surface 29, 32 is a stopper that is a stopper of the card detection adapter 30 that slides in the H direction by the spring A31, and 33 is a card. 2 is a stopper B, which is the other stopper of the card detection adapter 30 that slides in the H direction when 2 is inserted.
[0011]
Further, 34 is a detection push switch for detecting the insertion of the card 2 when the card detection adapter 30 is pushed by the card 2 and reaches the point of the stopper B33 and the contact is closed, and 35 is a card detection which is a contact signal of the detection push switch 34. The signal lines (hereinafter referred to as signal lines A) and 36 each have a tip that is substantially fitted into the notch of the card detection adapter 30, and the bottom of the stopper B is inclined with the end inclined downward. 29 side The leaf spring 37 is fixed to the ejector button 37 and is an eject button provided on the front surface 26, which is a push-type button capable of manually ejecting the card 2, and 38 is an eject bar that transmits the stress of the eject button 37 to the upper surface of the leaf spring 36. It is.
Also, 39 is an electrical contact provided on the card 2, 40 is a connection contact on the card read / write section 11, 41 is a connection between the connection contact 39 and the host CPU 12, and read / write between the host CPU 12 and the card 2 A card interface signal line (hereinafter, signal line B) which is an access line.
[0012]
Before the card 2 is inserted, it is in a state as shown in FIG. 2A. When the card 2 is inserted into the card reading / writing unit 11, the card 2 hits the card detection adapter 30,
The detection push switch 34 is turned ON, and the detection information of the card 2 is transmitted as the signal line A35. At this time, the notch at the bottom of the card detection adapter 30 is fitted to the tip of the spring 36, and the state is shifted to a state as shown in FIG.
In this position state, information can be exchanged between the electrical contact 39 on the card 2 and the host CPU 12 via the connection contact 40 and the signal line B41.
Note that by manually pressing the eject button 37, the leaf spring 36 is physically pushed down, the mating is released, and the card 2 is ejected.
[0013]
FIG. 3 is a diagram showing operations related to the power supply system of the vehicle-mounted device 1 in the first embodiment in time series. In the figure, when the engine lock 3 is turned on (time t0), the power supply voltage applied to the vehicle-mounted device 1 rises, and via the vehicle-mounted device operable lower limit voltage (voltage Vlw, time t1), the specified voltage (voltage Vop, At time t2), the vehicle-mounted device 1 starts a steady operation.
When the driver turns off the engine lock 3 (time t3) after the operation is finished, the voltage is lowered, and the lower limit voltage (Vlw) at which the vehicle-mounted device can operate from the time when the power supply drop is detected (voltage Vop, time t4). ) (Time t4 to t5), the presence / absence of insertion of the card 2 is detected and alarm processing such as voice notification is performed.
In addition, the period between the time t2 and t4 is a period of the steady operation state of the onboard equipment 1.
[0014]
FIG. 4 is a flowchart for explaining the operation of forgetting to remove a card in the processor 18 of the forgetting to remove card notification module 23 in the first embodiment.
In the figure, S101 to S116 Is a number assigned to each operation step.
When the driver inserts the key 4 into the engine lock 3 and turns it to turn it on [S101], supply of current from the storage battery 6 to the electrical component (not shown) or the vehicle-mounted device 1 is started.
[0015]
The engine can be rotated to start operation [S102, S103], and the vehicle-mounted device 1 starts the operation and at the same time the first control input line 24 Is monitored [S104].
When the car passes through the toll booth, the onboard device 1 and the card 2 inserted in the onboard device 1 communicate with the roadside wireless device to exchange the fee information wirelessly [S105].
When the driver finishes driving [S106], the driver turns off the engine lock 3, so that the power supply current to the vehicle-mounted device 1 is cut off [S107].
[0016]
However, in-vehicle device 1 Capacitor 16 as a secondary battery It can be operated for a certain period of time until the electric energy disappears even after the power is turned off. OBE 1 has a built-in voltage drop detection circuit 17 Power line (first control input line) 24 Is detected, and it is determined that the driver has turned off, that is, the driver has turned off the engine lock [S108].
Host CPU 12 In this way, a detection push switch of the card reader / writer 11 determines whether or not the voltage drop is detected and the card 2 remains inserted at that time. 34 Inspecting the state of the signal line A 35 [S109 / S110].
[0017]
Next, if the card 2 remains inserted in the card reading / writing unit 11 [S111], Capacitor 16 Is lowered to the predetermined voltage (Vlw), the vehicle-mounted device 1 notifies the presence of card insertion of the card 2 by voice. Therefore, the host CPU 12 Alarm code in 19 D / A conversion circuit 20 Is converted into an audio signal by an alarm generator 21 As an alarm.
[0018]
On the other hand, detection push switch 34 In step S112, when it is detected that the card 2 is not inserted, the card 2 is not inserted in the vehicle-mounted device 1, so that a voice notification that it is safe to get off is issued [S112]. Then, after a series of voice notifications, the vehicle-mounted device 1 stops operating [S113].
[0019]
Now, in the process of continuously notifying the card insertion alarm, the driver checks whether the card has been ejected [S114], and when the driver notices and ejects the card 2, the voice alarm is stopped. [S115].
However, when the card 2 remains without being discharged despite the voice alarm, the series of alarms are continued [S116], and then the vehicle-mounted device 1 stops its operation.
[0020]
Recent processors include D / A circuits that convert analog and digital signals. 20 There is an inexpensive type with a built-in, and such separation is easily possible. In short, the first embodiment indicates that the card 2 remains inserted when the card removal forget notification module 23 turns off the engine lock 3 independently of the routine processing of the host CPU 12 as the vehicle-mounted device. It can be dealt with by specializing in emergency notifications.
[0021]
In this embodiment, since the processor specializes in alarm processing independently of the host CPU, the host CPU side in the vehicle-mounted device processing unit can only perform application program processing in a steady state. The emergency processing load does not increase, and the host CPU program can be easily created.
[0022]
Further, in this embodiment, since the electric circuit to be supplied by the capacitor 16 is limited to the microprocessor unit 22 for detecting the disconnection state of the engine lock 3 and issuing an alarm, the capacity of the capacitor Is less.
[0023]
Further, in this embodiment, an example of giving an alarm by audio information based on the alarm code has been described. However, as means for notifying the alarm to the outside, a physical phenomenon such as video, image, or vibration is used as an audio means. Needless to say, the warning information can be realized as a single warning means or any combination of the warning means.
[0024]
In addition, although it demonstrated as an onboard equipment corresponding to the automatic toll collection system of a toll road, this is not restricted to this, Even if it is an automatic toll payment system, such as a toll parking lot and a drive through, etc., it is applicable.
[0025]
Embodiment 2. FIG.
The second embodiment according to the present invention is obtained by replacing the capacitor 16 with an electric double layer capacitor or a polyacene semiconductor capacitor in the first embodiment shown in FIG. That is, the configuration and the operation description in FIGS. 1 to 4 can be applied as they are, and the detailed description thereof will be omitted.
[0026]
In the second embodiment, the effects described in the first embodiment are the same, and the volume of the capacitor itself can be reduced by this replacement, so that the vehicle-mounted device can be downsized.
[0027]
Embodiment 3 FIG.
FIG. 5 is a diagram for explaining a second embodiment according to the present invention. In the figure, the same or corresponding parts as those in the first or second embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
In the figure, reference numeral 42 denotes a secondary battery built in the vehicle-mounted device 1.
In the third embodiment, the capacitor 16 is replaced with the secondary battery 42 in the first or second embodiment.
That is, when the engine lock 3 is disconnected, the voltage drop detection circuit 17 detects a predetermined voltage drop, and the processor 18 performs a process of performing an alarm process for forgetting to remove the card, not the charge charged in the capacitor. In this mode, a secondary battery is provided and the charge is retained.
[0028]
Next, the operation of the third embodiment will be described.
When the voltage drop detection circuit 17 detects a voltage drop and detects that the engine lock 3 is in a disconnected state, the processor 18 detects a push switch 34 that detects whether or not the card 2 is inserted in the card read / write unit 11. The state of the signal line A of the card detection signal line, which is the contact signal of. At this time, if the card 2 is inserted, for example, voice alarm data is read from the alarm code 19 and ejected from the alarm generator 21 via the D / A conversion circuit 20 because the card 2 remains inserted. Issue an alarm message.
[0029]
The above operation is the same as that in FIGS. 2 and 3 used in the description of the first or second embodiment, and the operation of the alarm notification of forgetting to remove the card of the vehicle-mounted device 1 and the use procedure of the driver are also shown in FIG. In the flowchart, the “capacitor” description portion of S111 and S112 is interpreted in the same manner as a secondary battery.
[0030]
In addition, you may comprise using the conventional small secondary battery, for example, a nickel cadmium battery. Here, an advantage of using the secondary battery is that the same voltage can be maintained for a certain time after the engine switch is turned off.
[0031]
In this embodiment, since the processor specializes in alarm processing independently of the host CPU, the host CPU side in the vehicle-mounted device processing unit can only perform application program processing in a steady state. The emergency processing load does not increase, and the host CPU program can be easily created.
[0032]
Further, in this embodiment, an example of giving an alarm by audio information based on the alarm code has been described. However, as means for notifying the alarm to the outside, a physical phenomenon such as video, image, or vibration is used as an audio means. Needless to say, the warning information can be realized as a single warning means or any combination of the warning means.
[0033]
In addition, although it demonstrated as an onboard equipment corresponding to the automatic toll collection system of a toll road, this is not restricted to this, Even if it is an automatic toll payment system, such as a toll parking lot and a drive through, etc., it is applicable.
[0034]
Embodiment 4 FIG.
FIG. 6 is a diagram for explaining a fourth embodiment according to the present invention. In the figure, the same or corresponding parts as those in the first to third embodiments are denoted by the same reference numerals, and a description thereof will be omitted.
An electronic switch circuit 43 includes a transistor 43a, analog switches 43b and 43c as switch elements, and resistors 43d and 43e, 44 is a power supply line (hereinafter referred to as a power supply output line), and 45 is a power supply line (hereinafter referred to as a second control input). Line).
[0035]
In the electronic switch circuit 43, the transistor 43a is a PNP transistor, and the analog switches 43b and 43c can be, for example, MC4066 of a CMOS integrated circuit manufactured by Motorola. The electronic switch circuit 43 is connected to the secondary battery 42 and is inserted between the secondary battery 42 and the microprocessor unit 22.
[0036]
Next, the operation of the fourth embodiment will be described.
First, in the electronic switch circuit 43, when the engine lock 3 is turned on (ON) and the interlocked engine switch 5 is turned on (ON), the analog switch 43b is turned on via the first control input line 24. Become. At this time, since current flows from the emitter to the base of the transistor 43a, the emitter and collector of the transistor 43a are conducted, and the current from the power input line 25 is supplied to the microprocessor unit 22 via the power output line 44. Power can be supplied.
[0037]
Now, since the power is also supplied to the second control input line 45 by the control from the microprocessor unit 22, the analog switch 43c is also operable. That is, the analog switches 43b and 43c are both in a conductive state.
Here, when the driving by the driver is finished, the engine lock 3 is turned off (OFF), and the engine switch 5 is turned off (OFF), the analog switch 43b is supplied with power from the first control input line 24. Therefore, the analog switch 43b is turned off.
[0038]
When the microprocessor unit 22 gives a predetermined notification after the engine lock 3 is turned off (OFF) and then stops supplying the voltage to the second control input line 45, the analog switch 43c is not connected. It becomes a state.
That is, the analog switches 43b and 43c are both turned off and the base current of the transistor 43a does not flow, so that the current to the power output line 44 is cut off. Accordingly, since the electronic switch circuit 43 is in a disconnected state, discharge from the secondary battery 42 can be prevented.
[0039]
That is, since the secondary battery 42 is not provided with a circuit for preventing discharge, the electric energy of the battery is discharged to zero after the engine lock 3 is disconnected. As long as the battery can sufficiently withstand charging / discharging, it may be left as it is. However, in order to increase the resistance to charging / discharging, an electronic switch circuit 43 is interposed between the secondary battery 42 and each circuit, so When it is unnecessary, the secondary battery 42 is disconnected to prevent overdischarge of the secondary battery 42.
[0040]
The advantage of using the secondary battery 42 is that, when the capacitor 16 is used after the engine lock 3 is disconnected, the voltage of the stored electric energy decreases as time passes. The secondary battery 42 can maintain substantially the same voltage for a certain time.
[0041]
In the fourth embodiment, a conventional small secondary battery such as a nickel cadmium battery may be used, and the secondary battery may be replaced with a capacitor.
[0042]
In this embodiment, since the processor specializes in alarm processing independently of the host CPU, the host CPU side in the vehicle-mounted device processing unit can only perform application program processing in a steady state. The emergency processing load does not increase, and the host CPU program can be easily created.
[0043]
Further, in this embodiment, an example of giving an alarm by audio information based on the alarm code has been described. However, as means for notifying the alarm to the outside, a physical phenomenon such as video, image, or vibration is used as an audio means. Needless to say, the warning information can be realized as a single warning means or any combination of the warning means.
[0044]
Embodiment 5 FIG.
FIG. 7 is a diagram for explaining a fifth embodiment according to the present invention. In the figure, the same or corresponding parts as those in the first to fourth embodiments are denoted by the same reference numerals, and a description thereof will be omitted.
11A is a card reading / writing unit in which a card ejecting function is added to the card reading / writing unit 11 by an external command signal, and 46 is connected to the card reading unit 11A from the microprocessor unit 22 as a trigger signal for card ejection operation. This is a signal line (hereinafter, signal line C).
[0045]
FIG. 8 is a diagram showing details of the structure of the card read / write unit 11A of the fifth embodiment. 8A is a diagram showing a state when the card 2 is not inserted into the card reading / writing unit 11A or when it is ejected, and FIG. It is a figure which shows a state when inserted in 11 A of cut parts.
[0046]
Reference numeral 47 denotes a spring B supporting the vicinity of the center of the leaf spring 36 by pulling it in the V direction: the lower side of the figure, and 48 is a plunger (solenoid) capable of operating the piston of the spring B47 by applying a signal line C. Here, the signal line C 46 for driving the plunger 48 is supplied with power from the microprocessor unit 22.
[0047]
Now, when an eject command signal is sent from the processor 18 to the signal line C46, the plunger 48 is driven, and the spring B47 is pulled in the arrow: D direction (the lower side in the figure). The leading end of the leaf spring 36 drops off the bottom of the card detection adapter 30 and comes off. For this reason, the card detection adapter 30 pushes out the card 2 again due to the repulsive force of the spring A31. Even if the eject button 37 is manually pushed, the leaf spring 36 is physically pushed down, so that the fitting is released and the same operation occurs.
[0048]
FIG. 9 is a flowchart for explaining the operation of forgetting to remove a card in the processor 18 of the forgetting to remove card notification module 23 in the fifth embodiment.
Note that the processing flow of FIG. 9 is S117 instead of the processing of S116 in the processing flow of FIG. That is, it is confirmed whether or not the card 2 has been ejected [S114], and if the card 2 remains without being discharged despite the voice alarm, the card reading / writing unit 11A is informed after a series of alarms are continued. A card eject command is sent [S117].
[0049]
In this embodiment, since the processor specializes in alarm processing independently of the host CPU, the host CPU side in the vehicle-mounted device processing unit can only perform application program processing in a steady state. The emergency processing load does not increase, and the host CPU program can be easily created.
[0050]
Also, in this embodiment, even if the alarm for forgetting to remove the card itself is automatically ejected even if the user side cannot respond for some reason, the forgetting to remove the card can be reliably transmitted. .
[0051]
Furthermore, according to this embodiment, even if the engine lock is turned off after the operation is finished and the user forgets to remove the card inserted in the vehicle-mounted device, the vehicle-mounted device continues to operate for a while due to the electrical energy accumulated in the secondary battery. Therefore, it is possible to give an alarm based on alarm information, and it is possible to prevent the secondary battery from being overdischarged by the electronic switch circuit and to keep its life long.
[0052]
【The invention's effect】
According to the first invention, since the processor specializes in the alarm processing independently of the host CPU, the host CPU side can perform only the application program processing in the steady state, so the burden of emergency processing is reduced. The host CPU program can be easily created without increasing.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a first or second embodiment according to the present invention.
FIG. 2 is a detailed view of a card read / write unit according to the first or second embodiment of the present invention.
FIG. 3 is a diagram showing an operation related to a power supply in the first or second embodiment according to the present invention.
FIG. 4 is a flowchart of an operation for forgetting to remove a card in the first or second embodiment according to the present invention.
FIG. 5 is a diagram showing a configuration of a third embodiment according to the present invention.
FIG. 6 is a diagram showing a configuration of a fourth embodiment according to the present invention.
FIG. 7 is a diagram showing a configuration of a fifth embodiment according to the present invention.
FIG. 8 is a detailed view of a card read / write unit according to a fifth embodiment of the present invention.
FIG. 9 is a flowchart of an operation for notifying forgetting to remove a card in the fifth embodiment according to the present invention.
[Explanation of symbols]
1 On-board unit, 2 card, 3 engine lock, 4 key, 5 engine switch,
6 storage battery, 7 antenna, 8 wireless transmission / reception circuit, 9 encryption / decryption authentication circuit,
10 display / input circuit 11, 11A card read / write unit, 12 host CPU,
13 Stabilized power supply circuit, 14 Onboard processing unit, 15 Diode,
16 capacitors, 17 voltage drop detection circuit, 18 processor,
19 Alarm code, 20 D / A conversion circuit, 21 Alarm generator,
22 Microprocessor part, 23 Card removal forget notification module,
24 power line (first control input line), 25 power line (power input line),
26 Front surface, 27 Back surface, 28 Upper surface, 29 Bottom surface,
30 Card detection adapter, 31 Spring A, 32 Stopper A,
33 Stopper B, 34 Detection push switch,
35 card detection signal line (signal line A), 36 leaf spring, 37 eject button, 38 eject bar, 39 electrical contact, 40 connection contact,
41 card interface signal line (signal line B), 42 secondary battery,
43 electronic switch circuit, 44 power line (power output line),
45 Power line (second control input line),
46 eject command signal line (signal line C), 47 spring B, 48 plunger,

Claims (8)

In the in-vehicle device that receives power supply from the storage battery via the engine switch and the card can be inserted and removed,
A card reading / writing unit that detects the insertion / removal state of the card and reads / writes the card based on a signal from the host CPU;
A capacitor connected to the engine switch via a diode;
A voltage drop detection circuit that detects a voltage drop of the input power source that is taken in from the storage battery; and
A microprocessor for inputting a detection signal for detecting the insertion / removal state of the card, and for outputting a warning information indicating that the card has been forgotten to be removed by a voltage drop signal of the voltage drop detection circuit;
And an alarm generator for generating an alarm by the alarm information of the forgetting to pull out,
With
When the user operates the engine lock linked to the engine switch to the disconnected state, the voltage drop detection circuit detects the voltage drop of the input power supply, and the card is mounted in the card read / write unit, the capacitor The vehicle-mounted device is characterized in that the alarm information forgetting to remove is output while the battery holds the electric charge.   The on-vehicle device according to claim 1, wherein the capacitor is an electric double layer capacitor or a polyacene semiconductor capacitor.   The on-vehicle device according to claim 1, wherein the capacitor is a secondary battery. In the in-vehicle device that receives power supply from the storage battery via the engine switch and the card can be inserted and removed,
A card read / write unit that detects the insertion / removal state of the card and accesses read / write with the card based on a signal from the host CPU;
A secondary battery connected to the engine switch via a diode;
A voltage drop detection circuit that detects a voltage drop of the input power source that is taken in from the storage battery; and
A microprocessor for inputting a detection signal for detecting the insertion / removal state of the card, and for outputting a warning information indicating that the card has been forgotten to be removed by a voltage drop signal of the voltage drop detection circuit;
And an alarm generator for generating an alarm by the alarm information of the forgetting to pull out,
The vehicle-mounted device has a first switch element and a second switch element that control connection or disconnection of a power input line that takes in power from outside, and applies to the first switch element and the second switch element An electronic switch circuit capable of connecting or disconnecting the power input line by each voltage; and
With
When the user operates the engine lock linked to the engine switch to the disconnected state, the voltage drop detection circuit detects the voltage drop of the input power supply, and the card is in the card reading / writing unit, the above two The vehicle-mounted device characterized in that the alarm information forgetting to remove is output while the secondary battery holds the electric charge.   The on-vehicle device according to claim 4, wherein the secondary battery is a capacitor.   The on-vehicle device according to any one of claims 1 to 5, wherein the card reading / writing unit sends out a command signal for ejecting the card mounted on the card reading / writing unit.   7. The alarm generator according to claim 1, wherein when the card is ejected from the card reading / writing unit, the alarm generator stops an alarm based on the alarm information forgotten to be removed. 8. In-vehicle device.   The alarm means by the alarm generator is any means of voice, video, image, mechanical vibration phenomenon, or a composite means combining any one of them. The in-vehicle device described in 1.

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