Key interlock circuit for slot type key device

The present invention relates to a key interlock circuit of a slot type key device.

Conventionally, it has been known that a mechanical key is inserted and rotated into a key cylinder provided on an instrument panel to start an engine or the like (see, for example, Patent Document 1). In such a device, the mechanical key inserted in the key cylinder can be switched to the LOCK position, ACC position, ON position, and ST position, and the mechanical key can be inserted into and removed from the key cylinder only in the LOCK position. It is said that.

Further, in order to improve the safety of the automobile, such a device is provided with a key interlock that prevents the mechanical key from coming off from the key cylinder during traveling. When driving, the key interlock prevents the mechanical key from rotating from the ACC position to the LOCK position.

In recent years, in order to prevent automobile theft, it has been proposed to start an engine or the like by mutual communication between a key and a vehicle device (see, for example, Patent Document 2). This device performs collation by performing mutual communication of an identification code (immobilizer code) between the transponder provided in the electronic key and the vehicle equipment. Mutual communication (verification) is performed by inserting an electronic key into the key insertion slot of the knob provided on the instrument panel and made rotatable. Then, the electronic key (knob) can be rotated from the LOCK position to another position (ACC position, ON position, ST position) only when the identification codes match by mutual communication.

This device can also be inserted and removed from the key insertion slot of the knob only when the electronic key is in the LOCK position. This device also has a key interlock, and the electronic key (knob) cannot be rotated from the ACC position to the LOCK position by the key interlock during traveling.

Recently, commercialization of a slot-type key device has been desired. The slot-type key device is, for example, a device in which an electronic key is simply inserted into a slot mechanism provided on an instrument panel, and the key and vehicle equipment communicate with each other to start an engine or the like.<patcit num="1"><text>Japanese Unexamined Patent Publication No. 2001-253318</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 2001-303808</text></patcit>

<p> By the way, when trying to realize a key interlock in a slot type key device, there are the following problems. In the devices of Patent Documents 1 and 2, the mechanical key (electronic key) is prevented from coming off as the key cylinder (knob) rotates. On the other hand, this slot-type key device has a problem that the electronic key must be devised so as not to be inadvertently removed from the slot mechanism because the electronic key is simply inserted into the slot mechanism.</p><p> The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a key interlock circuit of a slot type key device capable of interlocking a key inserted into a key insertion member.</p>

<p> In order to achieve the above object, the invention according to claim 1 includes a detection means for detecting whether or not a key is inserted in a key insertion member of a slot type key device, and an ignition from a power source to a power supply means. The electric power control means for controlling whether or not to supply at least one of the electric power and the accessory electric power, and the electric power control means for detecting that the key is inserted into the key insertion member by the detection means. The key inserted in the key insertion member cannot be detached when it is controlled to supply at least one of the ignition power and the accessory power from the power source to the powered supply means. The gist is that it is equipped with means.</p><p> According to the second aspect of the present invention, in the key interlock circuit of the slot type key device according to the first aspect, a shift lever capable of switching to any one of a plurality of positions including the parking position is set to the parking position. The position determining means for determining whether or not the position is located is provided, and the position determining means determines that the shift lever is not located at the parking position, and the detecting means enters the key insertion member. The gist is to make the key inserted in the key insertion member inseparable when it is detected that the key is inserted.</p><p> (Action) In the invention according to claim 1, the following action is obtained. When the key inserted in the key insertion member cannot be detached, both of the following two conditions are satisfied. The first condition is that the key is inserted into the key insertion member, and the detection means detects that the key is inserted into the key insertion member. The second condition is that the power control means controls the power supply to supply at least one of the ignition power and the accessory power from the power supply to the power supply means. When both of the above two conditions are satisfied, the key inserted in the key insertion member is made inseparable by the inseparable means.</p><p> On the other hand, in a state where at least one of the ignition power and the accessory power is supplied from the power source to the power receiving means, and the key inserted in the key insertion member is made inseparable by the inseparable means. To take out the key from the key insertion member, do as follows. The power control means controls so that the ignition power and the accessory power are not supplied from the power source to the power supply means. Then, the non-removable means does not make the key inserted in the key insertion member non-removable, and the key can be taken out from the key insertion member.</p><p> The invention according to claim 2 obtains the following actions in addition to the actions of the invention according to claim 1. When the key inserted in the key insertion member is made inseparable, the two conditions described in the operation of the invention according to claim 1 are satisfied together, or the two conditions shown below are satisfied together. To. The first condition is that the key is inserted into the key insertion member and the detection means detects that the key is inserted into the key insertion member. The second condition is to position the shift lever in a position other than the parking position. When both of the above two conditions are satisfied, the key inserted in the key insertion member is made inseparable by the inseparable means.</p><p> On the other hand, at least one of the ignition power and the accessory power is supplied from the power source to the power receiving means, the shift lever is located at a position other than the parking position among the plurality of positions, and the key insertion member is further provided by the non-removable means. When the key is taken out from the key insertion member in a state where the key inserted in the key cannot be removed, the following is performed. The first condition is to switch the shift lever to the parking position. The second condition is that the power control means controls so that the ignition power and the accessory power are not supplied from the power source to the powered supply means. When both of the above two conditions are satisfied, the non-removable means does not make the key inserted in the key insertion member non-removable, and the key can be taken out from the key insertion member.</p>

<p> According to the present invention, the key inserted into the key insertion member can be interlocked.</p>

Hereinafter, an embodiment in which the key interlock circuit of the slot type key device of the present invention is embodied as a key interlock circuit of a key interlock system in an automatic transmission type vehicle will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, the key interlock system 11 includes a vehicle control device 12 and an electronic key 13 as a key. As shown in FIG. 2, the electronic key 13 has a card shape and is possessed by the owner (driver). The vehicle control device 12 is provided on the instrument panel 15 of the vehicle, detects whether or not the electronic key 13 is a legitimate key by intercommunication with the electronic key 13, and when the electronic key 13 is a legitimate key. Is a device for starting the engine and the like.

As shown in FIG. 3, the vehicle control device 12 includes a slot mechanism 14 as a key insertion member of a slot-type key device, a solenoid 16 as a non-removable means, a key insertion detection switch 21 as a detection means, and a key detection sensor 22. It has.

As shown in FIG. 2, the slot mechanism 14 has a bottomed square cylinder shape, and the electronic key 13 can be inserted and removed from the key arrangement space K opened on one side surface. As shown in FIG. 3, the slot mechanism 14 includes four side wall portions 14a, 14b, 14c, 14d and a bottom portion 14e. In the slot mechanism 14, the key arrangement space K opened to one side surface 14f is formed by the four side wall portions 14a to 14d and the bottom portion 14e. As shown in FIG. 2, the slot mechanism 14 is arranged so that one side surface 14f is exposed on the instrument panel 15 in the vehicle interior.

As shown in FIG. 3, the solenoid 16 is fixed to the side wall portion 14b on the surface opposite to the key arrangement space K. A plunger insertion hole 17 is formed in the side wall portion 14b, and the plunger 16a of the solenoid 16 is configured to advance and retract into the key arrangement space K through the plunger insertion hole 17.

The bottom 14e is provided with a key insertion detection switch 21 and a key detection sensor 22, which are mechanical contact type switches, on the surface of the key arrangement space K side. The key insertion detection switch 21 and the key detection sensor 22 include main body portions 21a and 22a and movable portions 21b and 22b, respectively. The main body portions 21a and 22a are embedded in the bottom portion 14e, respectively, and the movable portions 21b and 22b are arranged in the key arrangement space K. A communication antenna 35a, which will be described later, is arranged on the side opposite to the key arrangement space K with the side wall portion 14d as a reference.

Most of the electronic key 13 can be inserted into the key layout space K. An engaging recess 23 is formed on one side surface 13a of the electronic key 13. The engaging recess 23 is formed at a position facing the plunger 16a of the solenoid 16 when the electronic key 13 is brought into contact with the bottom 14e of the slot mechanism 14. The engaging recess 23 is configured to engage with the plunger 16a by advancing the plunger 16a of the solenoid 16.

For example, a transponder control unit 24 is embedded in the electronic key 13. The transponder control unit 24 generates an electromotive force when it receives a predetermined transponder drive radio wave, and outputs a response signal including a predetermined transponder code by using the electromotive force.

Then, when the electronic key 13 is inserted into the key arrangement space K of the slot mechanism 14 and the movable portion 22b of the key detection sensor 22 is pressed, the transponder control unit 24 of the electronic key 13 and the vehicle control device 12 communicate with each other. Is supposed to be done. When the vehicle control device 12 determines that the electronic key 13 is a normal key and the movable part 21b of the key insertion detection switch 21 is pressed, the plunger 16a of the solenoid 16 is advanced to engage the electronic key 13. It is designed to engage with the recess 23. As a result, the electronic key 13 cannot be detached from the slot mechanism 14.

Next, the electrical configuration of the vehicle control device 12 will be described. As shown in FIG. 1, the vehicle control device 12 includes an ignition switch 25, a collation control unit 32, a power supply control ECU 33, an engine control unit 34, a transponder communication unit 35, a step detection sensor 36, and a shift lock mechanism 37. .. The collation control unit 32, the power supply control ECU 33, and the engine control unit 34 specifically include a CPU, ROM, and RAM (not shown).

The key detection sensor 22, the ignition switch 25, the collation control unit 32, the engine control unit 34, the stepping detection sensor 36, and the shift lock mechanism 37 are connected to the power supply control ECU 33. A transponder communication unit 35 and an engine control unit 34 are connected to the collation control unit 32. The transponder communication unit 35 includes the communication antenna 35a.

As shown in FIG. 2, the ignition switch 25 includes a pressing portion 25a, and the pressing portion 25a is arranged so as to be exposed from the instrument panel 15. In the present embodiment, the ignition switch 25 is a momentary push button switch. As shown in FIG. 3, the electronic key 13 is inserted into the key arrangement space K of the slot mechanism 14, and when the electronic key 13 comes into contact with the bottom portion 14e, the movable portion 22b of the key detection sensor 22 is pressed. Then, the key detection sensor 22 outputs a detection signal to the power supply control ECU 33.

As shown in FIG. 1, the power supply control ECU 33 outputs a transponder drive signal to the collation control unit 32 when a detection signal is input from the key detection sensor 22. When the transponder drive signal is input, the collation control unit 32 outputs the drive signal to the transponder communication unit 35. Then, when this drive signal is input, the transponder communication unit 35 outputs a transponder drive radio wave having a predetermined frequency (for example, 134 kHz) from the communication antenna 35a. This transponder drive radio wave is output to the key layout space K of the slot mechanism 14.

The transponder control unit 24 inserted in the key layout space K of the slot mechanism 14 receives the transponder drive radio wave transmitted from the communication antenna 35a, and outputs a response signal in response to the transponder drive radio wave. The transponder communication unit 35 receives the response signal via the communication antenna 35a, and outputs the demodulated received signal to the collation control unit 32.

The collation control unit 32 collates the transponder code included in the received signal with the transponder code preset in itself (verification of whether or not it is a normal key). Then, when the transponder codes match, the collation control unit 32 outputs a start permission signal (verification completion signal) to the power supply control ECU 33 and the engine control unit 34. On the other hand, when the transponder codes do not match, the collation control unit 32 outputs a start prohibition signal to the power supply control ECU 33 and the engine control unit 34.

When the collation control unit 32 receives an engine drive signal indicating that the engine is being driven from the power supply control ECU 33, the collation control unit 32 stops the output of the drive signal to the transponder communication unit 35.

Further, an ACC relay (accessory relay) 41, an IG relay (ignition relay) 42, and an ST relay (starter relay) 43 are connected to the power supply control ECU 33. A battery (power supply) terminal and an ACC device 44 are connected to the ACC relay 41. A battery terminal and an IG device 45 are connected to the IG relay 42. A battery terminal and a starter 46 are connected to the ST relay 43. Examples of the ACC device 44 include a car stereo and a cigar writer, and examples of the IG device 45 include an engine control unit 34, a meter, and a wind regulator ECU. Each of the relays 41 to 43 is configured to turn on the contact when an operation signal (for example, an H level operation signal) is output from the power supply control ECU 33.

When the start permission signal is input from the collation control unit 32, the power control ECU 33 is in the engine start permission state. Then, in this engine start permission state, when the pressing portion 25a of the ignition switch 25 is pressed and a pressing operation signal (for example, an H level signal) is input, the power supply control ECU 33 sets the IG relay 42 and the ST relay 43. Outputs an operation signal to.

Therefore, the contacts of the IG relay 42 and the ST relay 43 are turned on, and power is supplied from the battery to the IG device 45 (engine control unit 34) and the starter 46. As a result, the starter 46 operates. Further, when the pressing operation signal is input from the ignition switch 25, the power supply control ECU 33 outputs a start signal to the engine control unit 34.

When the start permission signal is input from the collation control unit 32 and the start signal is input from the power supply control ECU 33, the engine control unit 34 performs fuel injection control, ignition control, and the like. Then, the engine control unit 34 detects the driving state of the engine based on the ignition pulse, the alternator output, and the like, and outputs a complete explosion signal to the power supply control ECU 33 when it is determined that the engine is driving.

While the engine is driving, the engine control unit 34 continues to output a complete explosion signal to the power supply control ECU 33. When the complete explosion signal is input from the engine control unit 34, the power control ECU 33 stops the output of the operation signal to the ST relay 43 to deactivate the ST relay 43, and also causes the operation signal to the ACC relay 41. Is output. Therefore, the contact of the ACC relay 41 is turned on, and power is supplied from the battery to the ACC device 44.

The power control ECU 33 outputs an engine stop signal to the engine control unit 34 when a pressing operation signal is input from the ignition switch 25 while the engine is being driven, that is, when a complete explosion signal is input. At the same time, the power supply control ECU 33 stops the output of the operation signal to the ACC relay 41 and the IG relay 42 to put the ACC relay 41 and the IG relay 42 into the inactive state. The engine control unit 34 stops the engine when the engine stop signal is input.

The stepping detection sensor 36 outputs a stepping signal to the power supply control ECU 33 when the brake pedal is stepped on. The power control ECU 33 outputs a movement permission signal to the shift lock mechanism 37 when a complete explosion signal is input from the engine control unit 34 and a stepping signal is input from the stepping detection sensor 36, and at other times, the power control ECU 33 outputs a movement permission signal. A movement prohibition signal is output to the shift lock mechanism 37.

As shown in FIG. 4, the shift lock mechanism 37 shifts the shift lever S located in the parking position to another position (for example, reverse position, neutral position, drive position, second position, low position) when a movement prohibition signal is input. It is configured so that it cannot be switched. Further, the shift lock mechanism 37 is configured so that the shift lever S can be switched to any position when a movement permission signal is input.

Next, a characteristic part in the electrical configuration of the key interlock system 11 will be described. The vehicle control device 12 includes the solenoid 16, the key insertion detection switch 21, diodes 51 and 52, and a P position detection switch 53 as a position determination means. In this embodiment, the P position detection switch 53 employs a mechanical contact type switch. The anode of the diode 51 is connected between the ACC relay 41 and the ACC device 44. One end of the key insertion detection switch 21 is connected to the cathode of the diode 51. One end of the solenoid 16 is connected to the other end of the key insertion detection switch 21, and the other end of the solenoid 16 is grounded. In the solenoid 16, the plunger 16a advances into the key arrangement space K when power is supplied, and the plunger 16a retracts from the key arrangement space K when power is not supplied.

When the electronic key 13 is inserted into the key arrangement space K of the slot mechanism 14 and the electronic key 13 comes into contact with the bottom portion 14e of the slot mechanism 14, the movable portion 21b of the key insertion detection switch 21 is pressed. Then, the key insertion detection switch 21 is turned ON.

Further, the anode of the diode 52 is connected between the IG relay 42 and the IG device 45. One end of the key insertion detection switch 21 is connected to the cathode of the diode 52. Further, one end of the P position detection switch 53 is connected between the key insertion detection switch 21 and the diodes 51 and 52, and the other end of the P position detection switch 53 is connected to the battery terminal.

The contact of the P position detection switch 53 is turned off only when the shift lever S capable of switching to any one of a plurality of positions including the parking position is in the parking position, and the contact is in the other position. Is configured to be ON. Examples of the plurality of positions include a parking position, a reverse position, a neutral position, a drive position, a second position, a low position, and the like. When the contact of the P position detection switch 53 is ON and the contact of the key insertion detection switch 21 is ON, power is supplied from the battery to the solenoid 16 via the P position detection switch 53 and the key insertion detection switch 21. (Hereinafter, this power is referred to as battery power e1).

In the present embodiment, the power supply control ECU 33, the ACC relay 41, and the IG relay 42 constitute a power supply control device 55 as a power control means. Further, the key interlock circuit 56 is composed of the power supply control device 55, the solenoid 16, the key insertion detection switch 21, and the P position detection switch 53.

Next, the operation of the key interlock circuit 56 of the present embodiment will be described. First, the key interlock of the electronic key 13 will be described. As a premise, it is assumed that the shift lever S is in the parking position.

When the electronic key 13 is inserted into the key arrangement space K of the slot mechanism 14 and the electronic key 13 comes into contact with the bottom 14e, a detection signal is output from the key detection sensor 22 to the power supply control ECU 33.

Then, the transponder codes are collated between the power control ECU 33, the collation control unit 32, the transponder communication unit 35, and the electronic key 13, and when the transponder codes match, the transponder control unit 32 controls the power supply. A start permission signal is output to the ECU 33 and the engine control unit 34.

When the pressing part 25a of the ignition switch 25 is pressed while the start permission signal is input to the power control ECU 33, the pressing operation signal is input from the ignition switch 25 to the power control ECU 33, and the power control ECU 33 is set to the IG relay 42 and the IG relay 42. Turn on the contact of ST relay 43. Then, power is supplied from the battery to the IG device 45, and the engine is driven. At this time, since the electronic key 13 inserted in the slot mechanism 14 is in contact with the bottom portion 14e, the contact of the key insertion detection switch 21 is ON, via the IG relay 42 and the diode 52. Power is supplied from the battery to the solenoid 16. Then, the plunger 16a of the solenoid 16 advances into the key arrangement space K and engages with the engaging recess 23 of the electronic key 13, and the electronic key 13 cannot be separated from the slot mechanism 14.

Then, after the engine is driven, the power supply control ECU 33 stops the output of the operation signal to the ST relay 43 and outputs the operation signal to the ACC relay 41. Then, power is supplied from the battery to the ACC device 44, and a path for supplying power from the battery to the solenoid 16 is connected via the ACC relay 41 and the diode 51.

Hereinafter, the electric power supplied from the battery to the solenoid 16 via the ACC relay 41 and the diode 51 is referred to as accessory electric power e2. Further, the electric power supplied from the battery to the solenoid 16 via the IG relay 42 and the diode 52 is referred to as an ignition electric power e3.

Next, unlocking the interlock of the electronic key 13 will be described. As a premise, the engine is driven, the shift lever S is located at a position other than the parking position, and the plunger 16a of the solenoid 16 advances into the key arrangement space K and engages with the engaging recess 23 of the electronic key 13. It is assumed that you are doing.

The interlock is released when both of the following two conditions are met. The first condition is to position the shift lever S in the parking position. Then, the contact of the P position detection switch 53 is turned off, and the battery power e1 supplied to the solenoid 16 is no longer supplied (the path of the battery power e1 is divided).

The second condition is to stop the power supply from the battery to the ACC device 44 and the IG device 45. That is, when the pressing portion 25a of the ignition switch 25 is pressed and the pressing operation signal is input, the power supply control ECU 33 stops the output of the operation signal to the ACC relay 41 and the IG relay 42, and the ACC relay 41 and the IG relay Deactivate 42 and stop the engine. As a result, the accessory power e2 and the ignition power e3 supplied to the solenoid 16 are no longer supplied (the paths of the accessory power e2 and the ignition power e3 are divided).

When both of the above two conditions are satisfied, the solenoid 16 is no longer supplied with power from the battery, the plunger 16a retracts from the key arrangement space K, and the electronic key 13 can be taken out from the slot mechanism 14.

Therefore, according to the key interlock system 11 of the present embodiment, the following effects can be obtained. (1) In the present embodiment, the key interlock circuit 56 shows the conditions for interlocking the electronic key 13 inserted in the slot mechanism 14 as follows. The contact of the key insertion detection switch 21 is turned on, the power supply control device 55 is controlled so as to supply the power of at least one of the accessory power e2 and the ignition power e3 to the solenoid 16, and the plunger 16a of the solenoid 16 is set to the key arrangement space K. I tried to advance to. Alternatively, turn on the contact of the key insertion detection switch 21 and turn on the contact of the P position detection switch 53 (position the shift lever S at a position other than the parking position), and advance the plunger 16a of the solenoid 16 to the key arrangement space K. I tried to make it.

On the other hand, the key interlock circuit 56 shows the conditions for releasing the key interlock of the electronic key 13 as follows. When the contact of the P position detection switch 53 is OFF and the accessory power e2 and the ignition power e3 are not supplied to the solenoid 16, the plunger 16a of the solenoid 16 is retracted from the key layout space K. By retracting the plunger 16a from the key arrangement space K, the electronic key 13 inserted in the key arrangement space K of the slot mechanism 14 can be taken out.

Therefore, the key interlock circuit 56 can suitably interlock the electronic key 13 inserted into the slot mechanism 14. In addition, the power control ECU 33 simply controls the ACC relay 41 and the IG relay 42 for supplying power to the ACC device 44 and the IG device 45, and the plunger 16a of the solenoid 16 is retracted from the key layout space K to perform the key. The interlock can be released. Therefore, it is not necessary for the power supply control ECU 33 to control the solenoid 16, and the number of controls of the power supply control ECU 33 can be reduced accordingly, and the component cost of the power supply control ECU 33 can be reduced.

(2) In the present embodiment, when the shift lever S is located in the parking position and the engine is stopped (the pressing portion 25a of the ignition switch 25 is pressed), the plunger 16a of the solenoid 16 is retracted from the key arrangement space K. I did.

Therefore, if the shift lever S is first positioned in the parking position and then the engine is stopped, the shift lock mechanism 37 makes it impossible to switch the shift lever S to another position at the moment when the engine is stopped. This shifts when both the complete explosion signal (signal indicating that the engine is driving) and the depression signal (signal indicating that the brake pedal is depressed) are not input to the power control ECU 33. This is because the lock mechanism 37 makes it impossible to switch the shift lever S located at the parking position to another position. As a result, the shift lock mechanism 37 can function suitably.

On the other hand, even if the engine is stopped first and then the shift lever S is switched to the parking position, the shift lock mechanism 37 makes it impossible to switch the shift lever S to another position at the moment when the shift lever S is switched to the parking position. Become. As a result, the shift lock mechanism 37 can function suitably. Therefore, in the vehicle control device 12 of the present embodiment, the electronic key 13 can be taken out from the slot mechanism 14 after the shift lock mechanism 37 is surely functioned.

(3) In the present embodiment, the key insertion detection switch 21 is a mechanical switch whose contact is turned ON when the electronic key 13 is inserted into the slot mechanism 14. Therefore, the key insertion detection switch 21 can perform the switching operation without being controlled by the power supply control ECU 33, and the circuit configuration can be simplified as compared with the case where the switching operation is controlled by the power supply control ECU 33, and the cost. It can be reduced.

(4) In the present embodiment, the P position detection switch 53 is a mechanical switch whose contact is turned off only when the shift lever S is in the parking position, and its contact is turned on when the shift lever S is in the other position. Therefore, the same effect as the above effect (3) can be obtained.

The embodiment may be changed to the following aspects. -In the above embodiment, it has been embodied as a key interlock circuit 56 of a key interlock system in an automatic transmission type vehicle. Not limited to this, it may be embodied as a key interlock circuit 61 of a key interlock system in a manual transmission type vehicle. As shown in FIG. 1, the key interlock circuit 61 omits the P position detection switch 53 and is configured such that the battery power e1 is not supplied to the solenoid 16. With this configuration, a key interlock action similar to that of the key interlock of the electronic key 13 in the embodiment is obtained. On the other hand, the interlock release of the electronic key 13 is as follows. As a premise, it is assumed that the engine is driven and the plunger 16a of the solenoid 16 advances into the key arrangement space K and engages with the engaging recess 23 of the electronic key 13. The interlock release is performed by stopping the power supply from the battery to the ACC device 44 and the IG device 45. As a result, the accessory power e2 and the ignition power e3 supplied to the solenoid 16 are no longer supplied, the plunger 16a retracts from the key arrangement space K, and the electronic key 13 can be taken out from the vehicle control device 12.

-In the above embodiment, the ignition switch 25 is a momentary type push button switch. Not limited to this, the ignition switch 25 may be an ignition switch 65 having a rotary knob 65a as shown in FIG. The rotary knob 65a is configured to be selected to one of the LOCK position, the ACC position, the ON position, and the ST position by being rotated. When the knob 65a is in the ACC position, the power control ECU 33 is configured to turn on the contacts of the ACC relay 41 and supply the accessory power e2 from the battery to the key insertion detection switch 21 (solenoid 16). When the knob 65a is in the ON position, the power control ECU 33 turns on the contact of the IG relay 42 and supplies the ignition power e3 from the battery to the key insertion detection switch 21 (solenoid 16). To do.

-In the above embodiment, the vehicle control device 12 includes the shift lock mechanism 37, but it may be omitted. In this configuration, the key interlock of the electronic key 13 is performed when one of the two patterns shown below is used. The contact of the key insertion detection switch 21 is turned on, and at least one of the ACC relay 41 and the IG relay 42 is turned on by the power control ECU 33. Alternatively, the contacts of the key insertion detection switch 21 and the P position detection switch 53 are both turned on.

-In the above embodiment, the key insertion detection switch 21 and the P position detection switch 53 employ a mechanical contact type switch. Not limited to this, the key insertion detection switch 21 as the detection means and the P position detection switch 53 as the position determination means may employ a non-contact type switch or various sensors. In short, the detection means (key insertion detection switch 21) is turned on when the electronic key 13 is inserted in the slot mechanism 14, and is turned off when the electronic key 13 is not inserted in the slot mechanism 14. It should be. Further, the position determination means (P position detection switch 53) may be turned on when the shift lever S is located at a position other than the parking position and turned off when the shift lever S is located at the parking position. ..

-In the above embodiment, the key to be inserted into the slot mechanism 14 is the electronic key 13, but a mechanical key as a key (a mechanical key that is only inserted but does not rotate) may be adopted. In this case, the mechanical key is provided with an engaging recess similar to the engaging recess 23.

-In the above embodiment, the solenoid 16 as a non-removable means causes the plunger 16a to advance into the key arrangement space K when power is supplied, and engages the plunger 16a with the engaging recess 23 of the electronic key 13. The electronic key 13 was made inseparable from the slot mechanism 14. Not limited to this, a chuck as a non-removable means may be adopted instead of the solenoid 16. This chuck is configured to sandwich the electronic key 13 inserted in the slot mechanism 14 when power is supplied so that the electronic key 13 cannot be detached from the slot mechanism 14.

-In the above embodiment, the power supply control device 55 is composed of a power supply control ECU 33 and relays (ACC relay 41 and IG relay 42). Not limited to this, the power supply control device 55 may be configured by the power supply control ECU 33 and the switching element.

Next, the technical idea that can be grasped from each of the above embodiments and the change of the embodiment will be added below. (B) The power control means receives ignition power and accessory power from the power source to the power receiving means based on the input of the verification completion signal indicating that the key inserted into the key insertion member is a normal key. The key interlock circuit of the slot-type key device according to claim 1 or 2, wherein it controls whether or not to supply electric power of at least one of the two.

(B) The first, second, and technical aspects of the detection means, which are mechanical switches that are turned on when a key is inserted into a key insertion member of a slot-type key device. The key interlock circuit of the slot type key device according to any one of the above-mentioned ideas (a).

(C) Claim 1, claim, wherein the position determination means is a mechanical switch that is turned ON when the shift lever is positioned at a position other than the parking position among a plurality of positions including the parking position. 2. The key interlock circuit of the slot type key device according to any one of the technical idea (a) and the technical idea (b).

<figref num="1">The block diagram which shows the schematic structure of the key interlock system.</figref><figref num="2">A perspective view showing the inside of a vehicle equipped with a key interlock system.</figref><figref num="3">The partial cross-sectional schematic diagram which shows the structure of the slot mechanism.</figref><figref num="4">The schematic explanatory view which shows the shift lever.</figref><figref num="5">Front view of the ignition switch in another example.</figref>

Code description

13 ... Electronic key as a key, 14 ... Slot mechanism as a key insertion member of a slot type key device, 16 ... Solenoid as a non-removable means, 21 ... Key insertion detection switch as a detection means , 44 ... ACC device as power supply means, 45 ... IG device as power supply means, 53 ... P position detection switch as position determination means, 55 ... as power control means Power supply controller, 56 ... key interlock circuit, e2 ... accessory power, e3 ... ignition power, S ... shift lever.