JPH0525967A - Door lock releasing device - Google Patents

Abstract

PURPOSE:To see that time lock of a door can not be released by an unjust means. CONSTITUTION:A manual operation mechanism 6 is provided, which releases the lock of a lock mechanism 1 by turning the rotor 9 of a key cylinder. This manual operation mechanism 6 is provided with a inhibit mechanism 16, which changes over between the coupled condition where it transmits the rotational displacement of a rotor 9 to the lock mechanism 1 and the interrupted condition where it is interrupted halfway. This inhibit mechanism 16 is in the coupled condition by a code judging circuit 26 which decodes the wave signal when a specified wave signal is issued from a transmitter. Accordingly, even if a different wave signal is issued, the inhibit mechanism 16 does not get in the coupled condition, so even if the rotor 9 is rotated with an unjust means, the lock of the door can not be released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for unlocking a door of, for example, an automobile, and in particular, when a signal is issued from an unlock signal generating means, the signal is decoded to automatically unlock the door. The present invention relates to a door lock release device having a mechanism for operating.

[0002]

2. Description of the Related Art For example, some automobiles have recently been equipped with a so-called wireless door lock device. This is because, for example, a transmitter is installed in the ignition key, and when the driver emits a radio signal (airborne signal) from this transmitter, the reception signal discrimination means provided on the vehicle body side decodes the radio signal and the radio signal Is a specific signal set for the vehicle, the electric actuator is operated to automatically lock the door, or the lock is automatically released.

[0003]

The wireless door lock device described above is very convenient to use because it can automatically lock or unlock the door by pressing the operation button of the transmitter. is there.

However, while the wireless door lock device has the above-mentioned convenience, if the electric actuator fails, for example, the door cannot be opened unless another means for unlocking the lock is provided.

Therefore, even in a vehicle equipped with a wireless door lock device, a manual operation mechanism is usually provided as usual. As is well known, when the ignition key is inserted into the key cylinder provided on the door and the rotor is rotated, the link mechanism applies the unlocking displacement to the door lock mechanism based on the rotation of the rotor. The lock is released.

For this reason, if a person other than the owner operates the key cylinder to rotate the rotor, the lock may be released.

The present invention has been made in view of the above circumstances, and a first object thereof is to unlock a lock mechanism when a specific signal is issued in order to automatically unlock a door. Provided with a door-operated mechanism that is equipped with a manual-operated mechanism in addition to an electrically-operated mechanism, the door is not unlocked even if the key cylinder is operated unless a specific signal is emitted. There is.

A second object of the present invention is to provide a door unlocking device which can unlock even when the unlocking signal generating means cannot output a signal for some reason.

[0009]

In order to achieve the first object, the door unlocking device of the present invention comprises a key cylinder, and a key is inserted into the rotor of the key cylinder to unlock the rotor in the unlocking direction. A manual operation mechanism that unlocks the lock mechanism of the door by rotating the rotor to release the lock mechanism and an electric actuator, and an electric actuator that unlocks the lock mechanism by the unlocking operation of the electric actuator. A manual operation mechanism, and a received signal determining means for unlocking the electric actuator of the electric operation mechanism when the received signal is a specific signal, wherein the manual operation mechanism includes the rotor. When the lock is turned in the unlocking direction, the lock mechanism will not be released when the lock mechanism is released. An inhibit mechanism that is in a shut-off state when the lock mechanism is in the locked state, and the receive signal determination means is configured to provide the inhibit signal when the receive signal is a specific signal. The electric actuator is configured to operate so that the mechanism is in the connected state.

In order to achieve the second object, the door unlocking device of the present invention includes a detecting means for detecting insertion of a key into the rotor, and the rotor is rotated in one direction and the other direction from the neutral position. And a signal generating means for generating a signal corresponding to the rotation direction thereof, and a signal generated by the signal generating means while the detecting means detects the insertion of a key into the rotor. When the pattern is a pattern, a rotor rotation pattern determination means is provided for unlocking the electric actuator of the electric operation mechanism or operating the electric actuator so that the inhibit mechanism is in the connected state. Is.

[0011]

In order to automatically unlock the door, the unlock signal generating means issues a signal. Then, when the signal is a specific signal, the electric actuator of the electric operation mechanism performs a lock release operation to release the lock of the door by the lock mechanism.

Further, in order to manually unlock the door, an unlocking signal generating means similarly issues an aerial propagation signal. Then, only when the signal is a specific signal, the electric actuator of the inhibit mechanism operates to bring the inhibit mechanism into the connected state. Then, when the key is inserted into the key cylinder and the rotor is rotated, the manual operation mechanism applies the releasing displacement to the lock mechanism based on the rotation of the rotor, and the door is unlocked.

At the time of unlocking, if no signal is issued from the unlocking signal generating means or if the signal is different from the specific signal even if it is issued, the inhibit mechanism remains in the cutoff state. Is done,
Even if the rotor is turned, the lock mechanism is not released and the door is not unlocked.

On the other hand, when the lock release signal generating means cannot generate the signal, the key is inserted into the key cylinder to rotate the rotor in the forward and reverse directions in a specific pattern. When this rotation pattern is a specific pattern, the electric actuator of the electric operating mechanism unlocks or the electric actuator of the inhibit mechanism operates to bring the inhibit mechanism into a connected state. Therefore, the lock mechanism is unlocked by the electric actuator of the electric operation mechanism or by inserting the key into the key cylinder and turning the rotor.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings by applying it to an automobile.

In FIG. 2, reference numeral 1 denotes a lock mechanism provided on a door (not shown). When a lock displacement is applied, the lock mechanism 1 engages with a locking portion on the vehicle body side to lock the door in a closed state. When the release displacement in the direction opposite to the lock displacement is given, the lock is released. The lock mechanism 1 can be operated both electrically and manually.

First, the electric operation mechanism 2 for electrically operating the lock mechanism 1 includes an electromagnet 3 for locking and an electromagnet 4 for unlocking as an electric actuator. Then, when the lock electromagnet 3 is energized by the door lock / unlock switch 5 shown in FIG. 1 provided on the door on the driver's side, the movable iron core (not shown) is attracted and displaced by the lock electromagnet 3 to lock. The mechanism 1 is configured to apply a lock displacement to lock the door in the closed state.
Further, when the unlocking electromagnet 4 is energized by the door lock / unlock switch 5, the movable iron core (not shown) is attracted by the unlocking electromagnet 4 and displaced in the opposite direction to that at the time of locking to release the lock mechanism 1. It is configured to apply a displacement to unlock the door.

The manual operation mechanism 6 for manually operating the lock mechanism 1 uses a key cylinder 7 provided on a door (not shown) as a manual operation source. This key cylinder 7
A rotor 9 is rotatably provided in the rotor case 8, and an ignition key 10 can be inserted into the rotor 9 through a key insertion opening 9a. The rotor 9 is connected to the ignition key 10
Thus, the rotary operation is performed from the neutral position in the lock direction indicated by the arrow A and the lock release direction indicated by the arrow B opposite thereto. The rotational movement of the rotor 9 in the lock direction and the lock release direction is given to the lock mechanism 1 via the link mechanism 11 as lock displacement and release displacement.

The link mechanism 11 includes a revolving arm 12 fixed to the rear end of the rotor 9 of the key cylinder 7, a revolving arm 13 provided on the lock mechanism 1 side, and a space between these revolving arms 12 and 13. The upper rod 14 and the lower rod 15 provided so as to be connected are provided. When the rotor 9 is rotated in the lock direction indicated by the arrow A and the revolving arm 12 is rotated in the same direction, the upper rod 14 is moved in the pulling direction indicated by the arrow C. When the rotor 9 is rotated in the unlocking direction shown by the arrow B and the turning arm 12 turns in the same direction, the upper rod 14 is moved in the pushing direction shown by the arrow D opposite to the arrow C. It is configured.

An inhibit mechanism 16 is provided between the upper rod 14 and the lower rod 15. The inhibit mechanism 16 transmits the displacement in the pushing direction of the upper rod 14 when the rotor 9 is rotated in the unlocking direction to the lower rod 15 or does not transmit it to the lower rod 15. is there.

In FIG. 3 showing the specific structure of the inhibit mechanism 16, reference numeral 17 denotes a sleeve, and the upper rod 14 and the lower rod 15 are provided inside both ends of the sleeve 17.
The end of is inserted slidably. Large-diameter portions 14a and 15a are formed at the ends of the rods 14 and 15, respectively.
By locking 5a to the end of the sleeve 17, both rods 14 and 15 are configured so as not to slip out of the sleeve 17.

At the center of the sleeve 17, a biaxial motor 18 is arranged as an electric actuator capable of rotating in the forward and reverse directions, and screw rods 19 and 20 are fixed to both ends of the rotating shaft 18a. Has been done. The male threads of the two threaded rods 19 and 20 are formed so that the winding directions thereof are opposite to each other, and the nut members 21 slidably fitted to the threaded rods 19 and 20 on both sides in the axial direction in the sleeve 17. And 22 are screwed together. In addition,
The nut members 21 and 22 are prevented from rotating by engaging the protrusions 21a and 22a protruding on the outer peripheral portion with the grooves 17a formed on the inner peripheral surface of the sleeve 17 so as to extend in the axial direction. ing.

When the motor 18 rotates in the forward direction, both nut members 21 and 22 slide in the opening directions indicated by arrows E and F, respectively. Then, as shown in FIG. 3, both nut members 21 and 22 contact the large-diameter portions 14a and 15a of the upper rod 14 and the lower rod 15 to press the large-diameter portions 14a and 15a against both ends of the sleeve 17, The rod 14 and the lower rod 15 are in a connected state.

In this connected state, the upper rod 14 has an arrow D.
When it moves in the pushing direction shown by, the movement displacement is transmitted to the lower rod 15 through the nut member 21, the screw rod 19, the rotary shaft 18a, the screw rod 20, and the nut member 22 in order,
The lower rod 15 moves in the same direction. This lower rod 1
By the movement in the pushing direction of 5, the revolving arm 13 is revolved in the direction of arrow G, and the lock mechanism 1 is released.

When the motor 18 rotates in the opposite direction,
Both nut members 21 and 22 have arrows E and F, respectively.
Slide in the closing direction opposite to. Then, as shown in FIG. 4, both nut members 21 and 22 and both rods 14 are
A gap is formed between the large-diameter portions 14a and 15a of the rods 15 and 15, and the connection between the upper rod 14 and the lower rod 15 is cut off. In this cut-off state, even if the upper rod 14 moves in the pushing direction shown by the arrow D, the upper rod 14 only slides alone, and the displacement thereof is lower rod 15.
Is not transmitted to. Therefore, even if the rotor 9 rotates in the unlocking direction, the link mechanism 11 does not give the unlocking displacement to the lock mechanism 1.

From the above, the link mechanism 11 is based on the rotation of the rotor 9 in the unlocking direction only when the inhibit mechanism 16 is in the connected state.
The lock is released by giving a release displacement to. The inhibit mechanism 16 is configured to be in the cutoff state when the lock mechanism 1 is in the locked state.

By the way, since the moving direction of the upper rod 14 is the pulling direction when the rotor 9 is rotated in the locking direction indicated by the arrow A, the inhibit mechanism 16 is in either the connected state or the disconnected state. The movement of the upper rod 14 in the pulling direction is transmitted to the lower rod 15 via the sleeve 17. Then, when the lower rod 15 moves in the pulling direction indicated by the arrow C, the revolving arm 13 is revolved in the direction opposite to the arrow G to give the lock mechanism 1 a lock displacement. Therefore, when the rotor 9 is rotated in the lock direction,
Whether the inhibit mechanism 16 is in the connected state or the disconnected state, the lock mechanism 1 can be locked.

Therefore, the ignition key 10 is provided with a transmitter (not shown) as a lock release signal generating means, and a lock side operation button 23 and a lock release side for making the transmitter perform a transmitting operation. 24 are provided. Although not shown, the ignition key 10 contains a battery, and the transmitter uses the battery as a power source. Then, when the operation buttons 23 and 24 are operated, the transmitter starts a transmission operation and the ignition key 10
From the lock command and unlock command to the airborne signal,
For example, it is configured to transmit as a radio signal.
Then, the radio signal is the antenna 2 of the automobile shown in FIG.
5 is received. The radio signal is configured as a code signal of several tens of bits, the content of the code is different between the lock command and the unlock command, and the lock command and the unlock command are set to a specific code for each vehicle. .

The radio signal received by the antenna 25 is transmitted to the code discriminating circuit 26 as the received signal discriminating means. The code discriminating circuit 26 discriminates whether the code of the received radio wave signal is a specific code determined for the vehicle, and whether the code is a lock command or a lock release command. When the code is the specific code, the lock electromagnet 3 of the electric operation mechanism 2 is energized to lock the lock mechanism 1 in response to the lock command. Further, in response to the unlocking command, the unlocking electromagnet 4 of the electric operation mechanism 2 is energized to lock the lock mechanism 1.
Lock release operation, and the inhibit mechanism 16
The inhibit mechanism 1 is rotated by rotating the motor 18 in the forward direction.
6 is connected.

On the other hand, the unlocking electromagnet 4 of the electric operating mechanism 2 is also energized by rotating the rotor 9 of the key cylinder 7 in a predetermined rotation pattern set for each vehicle. That is, the key insertion opening 9a of the rotor 9 is provided with a shutter 27 which is opened by inserting the ignition key 10 as shown in FIG. A shutter switch 28 that operates in conjunction with the opening operation of the shutter 27 is provided, and the shutter switch 28 is made to function as a detection unit that detects that the ignition key 10 is inserted into the rotor 9. I am configuring.

A projecting piece 9b is provided on the rear end of the rotor 9 as shown in FIG. The rotor case 8 has a forward rotation detection switch 29 and a reverse rotation detection switch 29, which are, for example, proximity switches as signal generation means for detecting that the rotor 9 has been rotated from the neutral position in the positive locking direction and the reverse locking release direction. Rotation detection switch 3
0 is provided.

The detection signals of the shutter switch 28, the forward rotation detection switch 29, and the reverse rotation detection switch 30 are input to a rotor rotation pattern discriminating circuit 31 as rotor rotation pattern discriminating means, as shown in FIG.
The rotation pattern determination circuit 31 detects the forward rotation detection switch 29 and the reverse rotation detection while the detection signal is input from the shutter switch 28, that is, between the time when the ignition key 10 is inserted into the rotor 9 and the time when the ignition key 10 is extracted. By detecting in what order the switch 30 operates, it is detected in what pattern the rotor 9 is rotated. Then, the rotor rotation pattern determination circuit 3
1 is configured to energize the unlocking electromagnet 4 of the electric operation mechanism 2 when the detected rotation pattern of the rotor 9 matches a specific rotation pattern defined for the vehicle.

Next, the operation of the above configuration will be described.

When the driver leaves the vehicle, the operation button 2 on the lock side of the ignition key 10 is used to lock the door.
It is assumed that 3 is operated. Then, the ignition key 10
A lock command is issued as a radio wave signal from the radio wave signal, and the radio wave signal is received by the antenna 25 and the code discrimination circuit 26
Be transmitted to. The code discrimination circuit 26 energizes the lock electromagnet 3 of the electric operation mechanism 6 only when the radio signal is a specific code. As a result, the lock mechanism 1 is given a lock displacement to lock the door in the closed state, and the motor 18 of the inhibit mechanism 16 rotates in the reverse direction in conjunction with the lock operation of the lock mechanism 1, thereby causing the inhibit mechanism to rotate. 16 is cut off.

Now, in order to unlock the door in order to drive the automobile, the operation button 24 on the unlock side of the ignition key 10 is operated. Then, an unlock command is issued from the ignition key 10 as a radio signal, and the radio signal is received by the antenna 25 and transmitted to the code discrimination circuit 26. The code determination circuit 26 determines whether the radio signal is a specific code. When the radio wave signal is the signal of the specific code, the code determination circuit 26 energizes the unlocking electromagnet 4 of the electric operation mechanism 2 and rotates the motor 18 of the inhibit mechanism 16 in the forward direction. The inhibit mechanism 16
Are connected. By energizing the unlocking electromagnet 4, unlocking displacement is given to the lock mechanism 1 and the lock of the door is unlocked.

When the radio signal is not the specific code, the code determination circuit 26 does not energize the unlocking electromagnet 4 and does not rotate the motor 18 of the inhibit mechanism 16 in the forward direction. Therefore, the lock mechanism 1 remains in the locked state and the door cannot be opened.

When the door is locked, it is assumed that a person other than the driver attempts to unlock the door by inserting a foreign object into the rotor 9 of the key cylinder 7 and rotating it in the unlocking direction. Then, the revolving arm 12 revolves in the unlocking direction shown by the arrow B and moves the upper rod 14 in the pushing direction shown by the arrow D. However, since the inhibit mechanism 16 is in the shut-off state shown in FIG. 4 and there is a gap between the upper rod 14 and the nut member 21, the upper rod 14 slides alone with respect to the sleeve 17, The movement displacement is not transmitted to the lower rod 15. Therefore, even if the rotor 9 is rotated in the unlocking direction, the lock mechanism 1 remains in the locked state and the door cannot be opened.

Therefore, unless the radio signal emitted from the ignition key 10 is a specific code, the inhibit mechanism 16 cannot be switched to the connected state. Therefore, even if the manual operation mechanism 6 is provided, the manual operation mechanism 6 is provided.
The door cannot be unlocked illegally due to.

On the other hand, when the unlocking electromagnet 4 of the electric operating mechanism 2 fails, the unlocking electromagnet 4 is released.
Then, the lock of the lock mechanism 1 cannot be released. In such a case, the door is unlocked by the manual operation mechanism 6. For that purpose, first, a lock release command is issued as a radio signal from the ignition key 10. Then, in the same manner as described above, the inhibit mechanism 1
The motor 18 of 6 rotates in the forward direction to bring the inhibit mechanism 16 into a connected state.

Then, the ignition key 10 is inserted into the rotor 9 and rotated in the unlocking direction. Then, since the revolving arm 12 rotates in the same direction to move the upper rod 14 in the pushing direction, the movement displacement in the pushing direction is transmitted to the lower rod 15 via the inhibit mechanism 16 in the connected state, and the lower rod 15 is moved. The rod 15 is moved in the pushing direction. By this movement of the lower rod 15 in the pushing direction, the revolving arm 13 is rotated in the direction of arrow G, and the lock mechanism 1 is released. As a result, the lock mechanism 1 performs the unlocking operation to unlock the door. Therefore, even if the electric operation mechanism 2 fails, the lock mechanism 1 can be unlocked by the manual operation mechanism 6.

When the battery, which is the power source of the oscillator, is consumed and the power is lost due to long-term use, the ignition key 1
No radio signal can be transmitted from 0. Therefore, the door cannot be unlocked depending on the radio signal. In such a case, the ignition key 10 is inserted into the rotor 9 of the key cylinder 7 to rotate the rotor 9 in the forward and reverse directions with a specific rotation pattern. Then, detection signals are output from the forward rotation detection switch 29 and the reverse rotation detection switch 30, and the rotor rotation pattern determination circuit 31 detects the rotation pattern of the rotor 9 based on the detection signals. Then, when the rotation pattern of the rotor 9 is a specific pattern, the rotor rotation pattern determination circuit 31 energizes the unlocking electromagnet 4 of the electric operation mechanism 2, whereby the lock mechanism 1 is unlocked. It works and unlocks the door.

In the above embodiment, the inhibit mechanism 16 is connected by the radio signal of the unlock command, but the inhibit mechanism 16 is connected by the radio signal of the code different from the lock command. You may choose to.

Further, in the above embodiment, in order to deal with the consumption of the battery, when the rotation pattern of the rotor 9 is a specific pattern, the rotor rotation pattern determination circuit 31 causes the unlocking electromagnet 4 of the electric operation mechanism 2. However, the lock mechanism may be manually unlocked by rotating the motor 18 of the inhibit mechanism 16 in the forward direction to bring the inhibit mechanism 16 into a connected state.

Further, in the above embodiment, the aerial radio signal is a radio signal, but it may be an ultrasonic signal, an infrared signal or the like, and the lock signal generating means is not limited to the transmitter, but may be, for example, A structure in which a large number of fine holes are formed in the ignition key 10 and a light emitting / receiving device is provided in the key cylinder 7 so that when the ignition key 10 is inserted into the key cylinder 7, a specific signal is emitted upon receiving light passing through the fine holes. It may be one.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and the inhibit mechanism 16 is not limited thereto.
There are various other conceivable specific configurations of the rotary arm 12 as the inhibit mechanism.
Is provided in a portion for transmitting the rotation of the rotor 9 to the swing arm 9
It may be configured to be transmitted to or not transmitted to, and is not limited to unlocking a door lock of an automobile, and can be widely applied to a general unlocking device for doors, etc. within a range not departing from its gist. It can be changed and implemented.

[0046]

As described above, according to the present invention, the following excellent effects can be obtained.

According to the door lock release device of the first aspect, the manual operation mechanism is provided with a shut-off state which prevents the lock mechanism from being released when the rotor of the key cylinder is rotated in the lock release direction. By providing an inhibit mechanism for switching the lock mechanism to a connected state that gives a release displacement and operating the inhibit mechanism to be in the connected state when the reception signal determination means receives a specific signal, the unlock signal is generated. If the signal is not emitted from the generating means, or if the signal has a content different from the specific signal even if it is emitted, the inhibit mechanism is left in the cut-off state. No release displacement is applied to the door and the door is not unlocked. Therefore, even if the rotor is turned illegally, there is no risk of unlocking.

According to the door lock releasing device of the second aspect, it is possible to determine in what pattern the rotor is rotated in one direction and the other direction from the neutral position between the time when the key is inserted into the rotor and the time when the key is extracted. When the detected rotation pattern is a predetermined rotor rotation pattern, the electric actuator of the electric operation mechanism is unlocked,
Alternatively, by adopting a structure in which the inhibit mechanism is operated so as to be in the connected state, even when the signal cannot be issued from the lock release signal generating means, the key is inserted into the key cylinder and the rotor is rotated in a specific pattern. By rotating the door in the opposite direction, the door can be unlocked by an electric operation mechanism or a manual operation mechanism.

[Brief description of drawings]

FIG. 1 is an overall mechanical and electrical coupling configuration diagram showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a manual operation mechanism of a lock mechanism.

FIG. 3 is an enlarged vertical cross-sectional view showing the inhibit mechanism in a connected state.

FIG. 4 is an enlarged vertical sectional view showing the inhibit mechanism in a cut-off state.

FIG. 5 is an enlarged perspective view showing the configuration related to the shutter of the rotor and its switch.

FIG. 6 is a switch configuration diagram for detecting a rotation direction of a rotor.

[Explanation of symbols]

1 is a lock mechanism, 2 is an electric operation mechanism, 3 is a lock electromagnet, 4 is a lock release electromagnet (electric actuator), 6 is a manual operation mechanism, 7 is a key cylinder, 9 is a rotor, 10 is an ignition key, 11 is a link mechanism,
Reference numerals 12 and 13 are swivel arms, 14 is an upper rod, 15 is a lower rod, 16 is an inhibit mechanism, 17 is a sleeve, 18
Is a motor (electric actuator), 26 is a code determination circuit (reception signal determination means), 28 is a shutter switch (detection means), 29 and 30 are forward rotation and reverse rotation detection switches (signal generation means), and 31 is a rotor rotation pattern. It is a discrimination circuit (rotor rotation pattern discrimination means).

Claims (2)

[Claims] 1. A key cylinder is provided, and a key is inserted into a rotor of the key cylinder and the rotor is rotated in an unlocking direction, so that the lock mechanism of the door is unlocked by unlocking the lock mechanism of the door based on the rotation of the rotor. An electric operation mechanism that includes a manual operation mechanism and an electric actuator, and unlocks the lock mechanism by unlocking the electric actuator, and an electric actuator of the electric operation mechanism when the received signal is a specific signal And a reception signal discriminating means for unlocking the lock mechanism, wherein the manual operation mechanism prevents the lock mechanism from being disengaged when the rotor is rotated in the lock releasing direction. It is equipped with an electric actuator that switches between the locked state and the connected state that gives release displacement to the lock mechanism Structure is provided with an inhibit mechanism in a disconnected state when in the locked state, the received signal determination means, when the received signal is a specific signal, such that the inhibit mechanism is coupled state,
A door unlocking device configured to operate the electric actuator. 2. A detection means for detecting insertion of a key into a rotor, a signal generation means for issuing a signal according to a rotation direction of the rotor when the rotor is rotated in one direction and the other direction from a neutral position, and the detection. When the signal generated from the signal generating means has a predetermined predetermined rotor rotation pattern while the means detects the insertion of the key into the rotor, the electric actuator of the electric operation mechanism is unlocked. 2. The door unlocking device according to claim 1, further comprising: a rotor rotation pattern determining means for operating the electric actuator so that the inhibit mechanism is in a connected state.