JP4706594B2 - Smart key system - Google Patents

Description

  The present invention relates to a smart key system.

JP-A-2005-240314

  By performing wireless polling communication between the wireless mobile key owned by the user and the in-vehicle device, it is possible to detect that the user holding the wireless mobile key has approached the vehicle and automatically unlock the door. Conversely, a smart key system that provides a function of automatically locking a door by detecting that a user has left the vehicle is being adopted in many vehicles.

  In the smart key system, a mechanical key may be used separately from the wireless portable key. For example, when the battery of the wireless portable key runs out and wireless communication is not performed with the vehicle, the user can lock / unlock the door by performing a manual operation using a mechanical key. In this case, the mechanical key is only for emergency use, and usually has a wireless portable key, so the frequency of use is essentially low. Recently, however, a situation has arisen in which this mechanical key is used relatively frequently for a different purpose. For example, when you go surfing or bathing in a car, you may want to keep the wireless mobile key closed in the car because it will break if you enter the sea with the wireless mobile key. .

  In this case, when the door of the driver's seat is locked using a mechanical key, the operation of closing the wireless portable key can be performed relatively easily if it is a vehicle type in which the doors of other seats are locked together. . However, as described above, on the manufacturer side, the positioning of the mechanical key is only for emergency use, and the operation specifications on the door side with respect to the mechanical key may be simplified. Specifically, when a driver's seat door is locked using a mechanical key, the doors of other seats are not interlocked and only the driver's seat door is selectively locked. There are quite a few in reality. Also in this case, it is often possible to close the wireless portable key in the vehicle. The simplest method is as follows. That is, the seats other than the driver's seat are locked from the inside of the vehicle, and finally the wireless portable key is placed inside the vehicle, hold the mechanical key, go out of the driver's seat door, and remove the driver's seat with the mechanical key. If locked, the wireless portable key is closed in the vehicle.

  By the way, in the smart key system, when a specific door (for example, a driver's seat door) is locked, the approach of the wireless portable key from the outside of the vehicle (that is, returning to the user's vehicle) is detected thereafter. Move to the waiting phase. At this time, on the vehicle side, the wireless portable key search process is periodically executed by wireless polling outside the vehicle.

  As described above, when the wireless portable key is closed in the vehicle by the mechanical key operation, there is no wireless portable key outside the vehicle, so that it is not necessary to perform an outside search by wireless polling. However, since the lock mechanism on the car side does not have means for detecting which key is used to perform the lock operation, it is known that the wireless portable key is closed in the car as it is. Polling for searching outside the vehicle will be repeatedly executed. In this case, for example, when the wireless portable key is placed near the door in the vehicle interior, the wireless portable key in the vehicle reacts to polling for searching outside the vehicle every time, and the battery consumption of the wireless portable key rapidly proceeds. is there.

  For example, in a vehicle model in which all doors are locked in conjunction with mechanical keys, a key interlocking lock signal is output from the ECU (Electronic Control Unit) along with all door locks, and the key interlocking lock signal is detected and wirelessly detected. It is also possible to search the inside of the portable key once, and when the wireless portable key is detected inside the vehicle, it is determined that the key is closed and polling for searching outside the vehicle can be stopped. However, in models where only the driver's seat can be locked with a mechanical key, the output of the key interlocking lock signal is not considered at all, and the trigger for searching the inside of the wireless portable key cannot be obtained. However, the problem that the wireless mobile key reacts cannot be avoided.

  The object of the present invention is, in particular, in a vehicle type in which the door of the driver's seat is locked by using the mechanical key and the door of the other seat is not locked in conjunction with the mechanical key while the wireless portable key is left in the vehicle. It is an object of the present invention to provide a smart key system that can effectively avoid the problem that battery power consumption proceeds due to reaction of a wireless portable key in a vehicle even when the door is locked.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, the present invention
All doors can be locked from inside the vehicle and locked from outside the vehicle using a wireless portable key, and at least a key engagement portion is provided on the driver's seat door, and the key engagement portion In the lock operation using the mechanical key in the vehicle, a smart key system in a vehicle in which only the driver's seat door can be selectively locked,
Vehicle outside search means for searching whether or not the wireless portable key exists within a predetermined vehicle outside search range by performing wireless polling communication outside the vehicle;
In-vehicle search means for searching whether the wireless portable key exists in the vehicle by performing wireless polling communication in the vehicle;
Lock detecting means for detecting the locked state of each door;
All door lock determination means for determining whether or not all doors are locked based on the detection state of the lock detection means;
When it is determined that all the doors are locked, and the wireless portable key is detected in the vehicle by the in-vehicle searching means, the wireless portable key is detected by the wireless polling communication to the out-of-vehicle searching means. Vehicle search limiting means for limiting vehicle search and not performing the limitation when the wireless portable key is not detected in the vehicle,
It is characterized by providing.

  According to the smart key system of the present invention, the vehicle search means for searching whether or not the wireless portable key exists in the vehicle by performing wireless polling communication into the vehicle is provided. Further, all door lock determining means for determining whether or not all doors are locked when the door is locked is provided. And when it determines with all the doors being locked and a wireless portable key is detected in a vehicle, the search outside a vehicle of a wireless portable key by wireless polling communication is restrict | limited. Therefore, it is possible to suppress the problem that the wireless signal of the wireless polling communication leaks into the vehicle and the wireless mobile key in the vehicle responds many times, and thus the consumption of the battery of the wireless mobile key can be avoided.

  The out-of-vehicle search restricting unit may prohibit out-of-vehicle search of the wireless portable key by wireless polling communication. In this case, since the wireless portable key is not searched outside the vehicle under the above-described conditions, the wireless portable key in the vehicle does not react to the polling outside the vehicle, and battery consumption can be minimized. However, an effect similar to the above aspect can be expected even in an aspect of reducing the frequency of the wireless portable key without completely prohibiting the search outside the vehicle.

  In addition, when the predetermined door is in the unlocked state, neither the vehicle searching means nor the vehicle searching means searches for the wireless portable key, and the lock detecting means unlocks at least one of the doors. When the change from the locked state to the locked state is detected, the all door lock determination means performs all door lock determination, and when the determination result is all door lock, the vehicle interior search for the wireless portable key is performed. it can. The vehicle outside search restricting means can prohibit the vehicle outside search of the wireless portable key when the wireless portable key is detected in the vehicle and does not prohibit when the wireless portable key is not detected. In this way, when a lock operation is detected, the presence or absence of the wireless portable key is checked preferentially by checking all door locks and searching inside the vehicle, and if necessary, search outside the vehicle can be quickly prohibited. The effect of suppressing the battery consumption of the wireless portable key is further optimized.

  It should be noted that it is possible to variously determine which door is not unlocked when searching for the wireless portable key. However, when the driver's seat door is unlocked, it is highly likely that the driver has gone out of the vehicle with the wireless portable key. It is possible to optimize the scene for performing the key search process. However, it is also possible to select another door as the predetermined door, such as a passenger seat door.

  Furthermore, the present invention can include a driver's seat door lock determination unit that determines whether or not the driver's seat door is locked based on the detection result of the lock detection unit. In this case, when the driver's seat door lock determining means determines that the driver's seat door is locked and the determination result by the all door lock determining means is not all door lock, the outside search for the wireless portable key is performed. Can be allowed. In the above scene, one of the doors other than the driver's seat door is unlocked and someone is staying in the car. When the visitor tries to go outside the vehicle temporarily, the probability of the occurrence is high, and it is significant to perform polling for searching outside the vehicle as usual.

  Next, the present invention can include an authentication unit that authenticates the wireless portable key detected by the vehicle searching unit or the vehicle searching unit. When the result of the determination by the all door lock determination means is all door lock, the wireless mobile key is detected in the vehicle by the in-vehicle search means, and when the detected wireless mobile key is accepted and authenticated, the search outside the vehicle is performed. If the vehicle is returned to the lock operation standby state without being performed and the rejection is authenticated, the vehicle can be configured to search outside the vehicle. In this way, it is possible to return to the lock operation standby state without performing a search outside the vehicle only when the wireless portable key is accepted and authenticated.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a block diagram of a smart key system 1 according to the present invention. As described above, the smart key system 1 includes a receiver 8 that receives a wireless signal from the wireless portable key 2, a verification ECU 9 to which the receiver 8 is connected, and a vehicle interior transmitter 4a that is connected to the verification ECU 9. 4b, transmitter 5 inside trunk, transmitter 6 outside trunk, D seat transmitter 7a outside vehicle compartment, P seat transmitter 7b outside vehicle compartment, body ECU 12, actuator 10 connected to the body ECU 12, lock position SW (switch) 3 The courtesy SW11 of each door is provided. The verification ECU 9 is connected to an IG (ignition) SW16, an ACC (accessory) SW17, a D seat trigger SW18, and a P seat trigger SW19.

  The verification ECU 9 is configured as a normal computer, and includes a CPU 91, a ROM 92, a RAM 93, an input / output unit (I / O) 95, and a bus line 94 connecting them. The ROM 92 stores a control program 92a and an ID code 92b, and the RAM 93 includes a work memory 93a and an ID authentication flag 93b. The CPU 91 reads out the control program 92a in the ROM 92 and executes it in the form of using the work memory 93a in the RAM 93 as a work area, so that the vehicle exterior search means, vehicle interior search means, lock detection means, all door lock determination means, driving A seat door lock determination unit and an authentication unit are realized. The receiver 8, IGSW 16, ACCSW 17, D seat trigger SW 18, and P seat trigger SW 19 are connected to the I / O 95 of the verification ECU 9.

  On the other hand, as shown in FIG. 1B, the wireless portable key 2 includes a battery 21, a stabilization circuit 22, a communication circuit 14, and an antenna 13. The communication circuit 14 stores an ID code unique to the vehicle.

  When the user is not in the vehicle, wireless inquiry signals are periodically transmitted from the vehicle interior transmitters 7a and 7b to the outside of the vehicle (wireless polling communication), and the user holding the wireless portable key 2 approaches a detection area described later. Then, the wireless portable key 2 receives the wireless signal and returns an ID code. The verification ECU 9 compares this ID code with the ID code 92b stored in the ROM 92 (which may be constituted by a flash memory or an EEPROM) to perform authentication. When the authentication is performed, the actuator 10 is actuated to unlock the door, or an unlock operation standby state in which unlocking can be performed by a user operation from outside the vehicle is entered. After entering the unlocking operation standby state, for example, when the user touches the D seat trigger SW 18 (touch sensor provided on the door handle) or a human sensor (not shown) is turned on, the unlocking is performed. Conversely, when the user holding the wireless mobile key 2 leaves the vehicle outside detection area, the door is locked.

  FIG. 2 shows the mounting position of the transmitter in the vehicle. Thus, the outside D seat transmitter 7a is provided on the driver's seat door, and the outside P seat transmitter 7b is provided on the passenger door. In-vehicle transmitters 4a and 4b are provided at the front and rear of the vehicle, and an in-trunk transmitter 5 and an off-trunk transmitter 6 are provided at the trunk.

  When the user goes out of the vehicle and out of the vehicle and the door is locked, wireless polling communication for searching whether or not the wireless portable key 2 exists in the vehicle outside detection area (vehicle outside search range) is started. A wireless inquiry signal is periodically transmitted outside the vehicle from the outside D seat transmitter 7a and the outside P seat transmitter 7b, and a vehicle outside detection area for searching for the wireless portable key 2 is formed. As shown in the figure, a part of the wireless inquiry signal leaks into the vehicle. Therefore, when the door is locked using a mechanical key while the wireless portable key 2 is placed in the vicinity of the door in the vehicle, a search outside the vehicle by wireless polling communication is started, and the wireless portable key 2 reacts to an inquiry signal leaked into the vehicle. This causes a problem that the battery 21 is consumed.

  Next, the relationship with the other seat door when the driver's seat door is locked will be described with reference to FIG. When the user having the wireless portable key 2 leaves the vehicle, the wireless portable key 2 does not respond to the wireless polling communication, and the all-door lock signal 25 is transmitted from the verification ECU 9 to the port P0 of the body ECU 12. The body ECU 12 receives this all door lock signal 25 and issues a door lock signal 27 to the actuators 10 of all doors. On the other hand, the engaging part 23 of the mechanical key 15 is provided in all doors including the driver's seat door 24. Only the driver's seat door 24 is selectively locked by the locking operation using the mechanical key 15 to the engaging portion 23 provided in the driver's seat door 24. That is, even if the driver's seat door 24 is locked by a lock operation using the mechanical key 15, the other seats are not locked in conjunction with each other. When the driver's seat door 24 is locked using the mechanical key 15, the lock position SW3 is closed and a door lock signal 26 is transmitted to the port P1 of the body ECU. However, even if the body ECU 12 receives the door lock signal 26, it does not give an instruction to lock the door to the other seats.

  On the other hand, the doors other than the driver's seat are also provided with the lock position SW3, and the door lock signal 26 is transmitted to the body ECU 12 from the lock position SW3 of each door. Thereby, it is possible to detect the locked state (locked or unlocked) of all doors. As is well known, the doors other than the driver's seat can be locked from inside the vehicle. Depending on the type of vehicle, the door can be locked from inside the vehicle with the door open, and then the door is closed (or the door knob outside the vehicle is turned on). The door may be closed / locked even by the operation of closing the door while pulling.

  Next, a flowchart when collating the wireless portable key 2 in the passenger compartment will be described with reference to FIG. First, in step S1, the operation standby state is entered, and this operation standby state (S1) is continued until it is determined in S2 that the driver's seat door 24 is unlocked. When the driver's seat door 24 is unlocked, it is determined Yes in S2, and the process proceeds to S3, where the ID authentication flag 93b (see FIG. 1A) is set to “0”. Thereafter, the process proceeds to S4 and S5, and wireless polling communication into the vehicle is started. That is, a radio inquiry signal is transmitted from the vehicle interior transmitters 4a and 4b.

  Next, the process proceeds to S6, and it is determined whether or not a response signal from the wireless portable key 2 has been detected. If YES is determined here, the process proceeds to S7. If NO, the process returns to S1 and again enters an operation standby state. When the user unlocks the driver's seat door from the outside of the vehicle using the wireless portable key 2 and enters the driver's seat, the wireless portable key 2 is present in the vehicle, so in S6, a response signal from the wireless portable key 2 is received. It is detected and becomes Yes. Conversely, when the user unlocks the door from the inside of the vehicle and goes out of the vehicle with the wireless portable key 2, the response signal is not detected in S6 because the wireless portable key 2 does not exist in the vehicle. Become. In S7, the wireless portable key 2 is authenticated. That is, it is confirmed whether or not the ID code returned from the wireless portable key matches the ID code 92b stored in the ROM 92. If the wireless portable key 2 has been accepted and authenticated, the process moves to S8 to register that the key is already verified in the vehicle, in this case the ID authentication flag 93b is set to "1", and the rejection authentication can be performed. If not, the process returns to S1 and again enters the operation standby state.

  When the user unlocks the door from the outside of the vehicle using the (regular) wireless portable key 2 and enters the vehicle after the door is opened (S2), the ID authentication flag 93b is displayed. It becomes “1” (S8). If the user unlocks the door from the inside of the vehicle and goes out of the vehicle with the wireless portable key 2 after the door is opened (S2), the process returns from S6 to S1 and S8 is not processed, and the ID authentication flag 93b is set. “0”. By performing the above processing, whether or not the wireless portable key 2 that has responded can be verified in the vehicle by checking whether the ID authentication flag 93b is “1” or “0” in step S108 described later. Can be determined.

  Based on the above processing, the operation of the control program 92a stored in the ROM 92 will be described with reference to the flowchart of FIG. This control program 92a is started when an unlocking operation (change from the locked state to the unlocked state) to any of the doors of the vehicle is detected. That is, in step S101, one of the doors is unlocked. In S101, the process waits until a lock operation (change from the unlocked state to the locked state) is detected. When the lock operation is performed, the process proceeds to S102. Hereinafter, the state of S101 is also referred to as a lock operation standby state.

  In S102, it is determined whether or not all doors are locked. As described above, all the doors are provided with the lock position SW3 (FIG. 3), and the lock state (locked or unlocked) of each door is detected by the door lock signal 26 from the lock position SW3. Can do. If it is determined in S102 that all the doors are locked (Yes), the process proceeds to S111. If it is determined that all the doors are not locked (No), the process proceeds to S103.

  In S111 and S112, a process for searching whether or not the wireless portable key 2 exists in the vehicle is performed. That is, in S111, wireless polling communication into the vehicle is started by transmitting wireless inquiry signals from the vehicle interior transmitters 4a and 4b. In S112, if the wireless portable key 2 present in the vehicle is detected and authenticated, it is determined that the room has been collated, and the process proceeds to S113. In S113, it will be in the state which waits until any door (or driver's seat door) is unlocked. That is, without performing external verification (wireless polling communication outside the vehicle), the user waits until the user unlocks one of the doors (or the driver's seat door) using the mechanical key 15, and unlocked. If so, the process returns to S101.

  When the user places the wireless portable key 2 in the vehicle and locks the door using the mechanical key 15 and locks all doors (Yes in S102), the in-vehicle search is started by the processing of S102 and S111 to S113. (S111) As a result, the wireless portable key 2 is detected in the vehicle (Yes in S112), and the process waits until the unlocking operation is performed without starting the external verification (polling) (S113).

  On the other hand, when it determines with No (it is not all door locks) by S102, it moves to S103 and determines whether the driver's seat door 24 is locked. If it is determined that the driver's seat door 24 is not locked (No), the process returns to the lock operation standby state in S101. On the other hand, if it is determined that the driver's seat door 24 is locked (Yes), the process proceeds to S104 and external verification is started. That is, the wireless inquiry signal is periodically transmitted from the outside D seat transmitter 7a and the outside P seat transmitter 7b. Then, the process proceeds to S105, where it is determined whether a certain time has elapsed. When it is determined No, the process proceeds to S107, and it is determined whether there is a response from the wireless portable key 2. The processing in the case where Yes is determined in S105 will be described later. If it is determined in S107 that there is no response (No), the process returns to S104, and an inquiry signal is transmitted again. If it is determined in S107 that there is a response (Yes), the process proceeds to S108. That is, in S104, S105, and S107, transmission of the wireless inquiry signal is continued until it is detected that the user having the wireless portable key 2 has entered the outside detection area (see FIG. 2).

  Next, in S108, it is determined whether or not the detected wireless portable key 2 has already been verified in the room. As described with reference to FIG. 4, when the user unlocks the door from the inside of the vehicle and goes out of the vehicle with the wireless portable key 2, the ID authentication flag 93 b becomes “0”. Further, when the door is unlocked from outside the vehicle while holding the wireless portable key 2 and enters the vehicle, it becomes “1”. In S108, the ID authentication flag 93b is checked. If it is “0”, it is determined that the key is taken out of the vehicle, that is, a key that has not been verified in the vehicle, and the process proceeds to S109. In S108, when the ID authentication flag 93b is “1”, it is determined that the key is not taken out of the vehicle, that is, a key that has been verified in the vehicle, and the process returns to S104.

  For example, when the user places the wireless portable key 2 in the vehicle and unlocks the passenger seat (No in S102) and locks the driver's seat door (Yes in S103), the external verification is performed in S104 and the vehicle is placed in the vehicle. The wireless portable key 2 may react (Yes in S107), but since it is determined in S108 that the key has been verified in the vehicle (Yes; the key placed in the vehicle), the process returns to S104. The processing for unlocking (S109, S110) is not performed. On the other hand, when the user goes out of the vehicle with the wireless portable key 2 and the passenger seat is unlocked (No in S102) and the driver's door is locked (Yes in S103), the outside verification in S104 is started. The When the user returns to the vehicle with the wireless portable key 2, the wireless portable key 2 reacts to the external verification (Yes in S107). In this case, since it is determined in S108 that the key is not verified indoors (No; the key is taken out of the vehicle), processing for unlocking (S109, S110) is performed. That is, by performing the process of S108, the unlock process (S109, S110) is performed only when the user approaches the vehicle with the wireless portable key 2.

  On the other hand, in S105 described above, it is determined whether or not a certain time has elapsed. For example, when the key has reacted for 10 minutes continuously in the external verification or when the external verification has not been performed for 14 days, the process proceeds to S106 and polling is stopped. Thereafter, the process returns to S101. For example, if a user with a key stands near the door, the key may continue to react for 10 minutes or more. In this case, polling can be stopped. For example, polling is stopped when the user is traveling and the key does not react for more than 14 days. Thereby, the electric power by the side of a vehicle can be saved.

  In S109, the process waits until the above-described human sensor is turned on or the D-seat trigger SW 18 or the P-seat trigger switch 19 is touched by the user. If the human sensor or the trigger SW 18, 19 is turned on in S109 (Yes), the process proceeds to S110, the door is unlocked, and then the process proceeds to the lock operation standby state in S101.

  In the flowchart of FIG. 5, when it is determined that all the doors are locked (Yes in S102) and the wireless portable key 2 is detected in the vehicle (Yes in S112), the process proceeds to S113. Restricts (prohibits) searching outside the vehicle with mobile keys. Thereby, since the wireless portable key 2 existing in the vehicle responds to the inquiry signal for searching outside the vehicle, it is possible to avoid problems such as exhaustion of the battery 21 (see FIG. 1).

  Further, in the flowchart of FIG. 5, when it is determined that the driver's seat door 24 is locked (Yes in S103) and not all doors are locked (No in S102), the processing of S104 to S108, that is, the wireless portable key 2 outside vehicle searches are allowed.

  In S102, when all the doors are locked, it is determined as Yes regardless of whether the door locked last is a driver seat or a passenger seat. That is, even if the driver's seat door is locked first and the passenger seat is locked last, it is determined that all doors are locked, and the processing of S111 and S112 is performed.

  In this embodiment, the process of S103 is performed after it is determined No in S102, but the order of performing S102 and S103 may be reversed.

  On the other hand, in S112, when it is determined that the wireless portable key is not detected in the vehicle (indoor verification No), the process proceeds to S104 to start wireless polling communication outside the vehicle. This is a flow in the case where all doors are locked (Yes in S102) and the in-vehicle search is performed but the wireless portable key 2 is not detected (No in S112).

  In the lock operation standby state in S101, neither the search for the wireless communication key 2 to the outside of the vehicle nor the search for the wireless communication key 2 to the inside of the vehicle is performed, and the process waits until the user performs a lock operation. Thereby, the electric power consumed by collation ECU9 grade | etc., Can be decreased.

  As described above, in the present invention, when all the doors are locked (Yes in S102) and the wireless portable key 2 is detected in the vehicle (Yes in S112), the outside search is limited (wait in S113). ). For this reason, it is possible to avoid the problem that the wireless portable key 2 reacts and the battery 21 is consumed due to the leakage of the wireless inquiry signal into the vehicle.

The block diagram of the smart key system which concerns on this invention, and the block diagram of a wireless portable key. Explanatory drawing of the transmitter provided in the vehicle and a detection area. Another block diagram of the smart key system. The flowchart of vehicle interior collation. The flowchart of a smart key system.

Explanation of symbols

1 Smart key system 2 Wireless mobile key 3 Lock position SW
4a, 4b Car interior transmitter 8 Receiver 9 Verification ECU
10 Actuator 15 Mechanical Key 18 D Seat Trigger SW
19 P seat trigger SW

Claims (6)

All doors can be locked from inside the vehicle and locked from outside the vehicle using a wireless portable key, and at least a key engagement portion is provided on the driver's seat door, and the key engagement portion In the lock operation using the mechanical key in the vehicle, a smart key system in a vehicle in which only the driver's seat door can be selectively locked,
Vehicle outside search means for searching whether or not the wireless portable key exists within a predetermined vehicle outside search range by performing wireless polling communication outside the vehicle;
In-vehicle search means for searching whether the wireless portable key exists in the vehicle by performing wireless polling communication in the vehicle;
Lock detecting means for detecting the locked state of each door;
All door lock determination means for determining whether or not all doors are locked based on the detection state of the lock detection means;
When it is determined that all the doors are locked, and the wireless portable key is detected in the vehicle by the in-vehicle search means, the wireless portable key is detected by the wireless polling communication to the out-of-vehicle search means. Vehicle search limiting means for limiting vehicle search and not performing the restriction when the wireless portable key is not detected in the vehicle,
A smart key system comprising:   2. The smart key system according to claim 1, wherein the out-of-vehicle search restricting unit prohibits out-of-vehicle search of the wireless portable key by the wireless polling communication with respect to the out-of-vehicle search unit.   When the predetermined door is unlocked, the search for the wireless portable key is not performed by the vehicle search means and the vehicle search means, and at least one of the doors is detected by the lock detection means. When the change from the unlocked state to the locked state is detected, the all door lock determination means performs all door lock determination, and if the determination result is all door lock, the in-vehicle search for the wireless portable key is performed. 3. The smart key system according to claim 2, wherein the vehicle outside search restriction means prohibits the vehicle outside search of the wireless portable key when the wireless portable key is detected in the vehicle, and does not prohibit when the wireless portable key is not detected.   4. The smart key system according to claim 3, wherein the predetermined door is a driver's seat door. A driver door lock determining unit that determines whether or not the driver seat door is locked based on a detection result of the lock detecting unit;
When the driver's seat door lock determining means determines that the driver's seat door is locked and the determination result by the all door lock determining means is not all door lock, the outside search of the wireless portable key is permitted. The smart key system as claimed in claim 4.   An authentication unit that authenticates the wireless portable key detected by the vehicle exterior search unit or the vehicle interior search unit; the determination result by the all door lock determination unit is an all door lock; When the wireless portable key is detected and the detected wireless portable key is accepted and authenticated, the search returns to the lock operation standby state without performing the outside search, and when the rejection is authenticated, the outside search The smart key system according to claim 5, wherein:

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