JPH0514448U - Door lock release device - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents doors from being unlocked by unauthorized means. [Structure] By rotating the rotor 9 of the key cylinder,
A manual operation mechanism 6 for unlocking the lock mechanism 1 is provided. The frame 17 of the lower rod 15 of the manual operation mechanism 6
An engaging member 18 that engages with and disengages from the upper rod 14 is rotatably provided, and the engaging member 18 is connected to a plunger 24 that is reciprocally moved by an electromagnet 23 via a link 27 to form an inhibit mechanism 16. This inhibit mechanism 16
When a specific radio wave signal is emitted from the transmitter, the code discriminating circuit 31 that decodes the radio wave signal causes the engaging member 1
8, the upper rod 14 and the lower rod 15 are connected to each other. Therefore, if the radio signal is not emitted, or if the radio signal has a different content even if emitted, the inhibit mechanism 16 does not enter the connected state, and the door is unlocked even if the rotor 9 is operated by an unauthorized means. You cannot do it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door unlocking device configured to unlock a door by inserting a key into a rotor of a key cylinder and turning the key.

[0002]

[Prior Art]

 For example, in a car, the door can be manually locked and unlocked.

As is well known, in this manual operation mechanism, when an ignition key is inserted into a key cylinder provided in a door and a rotor thereof is rotated, a link mechanism becomes a door lock mechanism according to a rotation direction of the rotor. It is configured to give a lock displacement or a release displacement to lock the door or release the lock.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional manual operation mechanism, the rotor of the key cylinder and the lock mechanism are always connected by the link mechanism, so that a person other than the owner operates the key cylinder to operate the rotor. It may be unlocked when turned.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a door lock releasing device in which the door is not unlocked even when the rotor of the key cylinder is rotated by an unauthorized means. It is in.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the door unlocking device of the present invention unlocks the door locking mechanism based on the rotation of the rotor by inserting a key into the rotor of the key cylinder and rotating the rotor in the unlocking direction. In a case where a manual operation mechanism for giving a displacement to release the lock is provided, when reciprocated, a connection state for connecting the rotor-side component member of the manual operation mechanism and the lock mechanism-side component member to each other When the rotor is turned in the unlocking direction by switching to the shut-off state that shuts off between the constituent members, the displacement of the rotor-side constituent members is transmitted to the lock-mechanism-side constituent members in the coupled state and released to the lock mechanism. An engaging member that gives displacement and prevents the displacement of the rotor-side component from being transmitted to the lock-mechanism-side component in the blocking state, and a link to this engaging member. Connected to each other and reciprocatingly moved by an electromagnet to reciprocate the engaging member and to bring the engaging member into the cut-off state when the lock mechanism is in the locked state, and an inhibit mechanism provided with a received signal. When the signal is a specific signal, a reception signal discriminating means for driving the electromagnet is provided so that the engaging member of the inhibit mechanism is in a connected state.

[0007]

[Action]

 When a signal is issued from the unlock signal generating means to unlock the door, the electromagnet of the inhibit mechanism is driven to connect the engaging member of the inhibit mechanism only when the signal is a specific signal. To Therefore, 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 to unlock the door.

At the time of unlocking, if the signal is not issued, or if the signal has a content different from the specific signal even if issued, the engaging member of the inhibit mechanism is left in the blocking state. Therefore, even if the rotor is turned, the unlocking displacement is not given to the lock mechanism, and the door lock is not unlocked.

[0009]

【Example】

 An embodiment in which the present invention is applied to an automobile will be described below with reference to FIGS. 1 to 7.

In FIG. 4, reference numeral 1 denotes a lock mechanism provided on a door (not shown). When the lock mechanism 1 is given a lock displacement, the lock mechanism 1 engages with a locking portion on the vehicle body side to lock the door in a closed state. However, when the release displacement in the opposite direction 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 that electrically operates 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. 5 provided on the door on the driver's side, the movable iron core (not shown) is attracted and displaced by the lock electromagnetic stone 3. The lock mechanism 1 is configured to apply a lock displacement to lock the door in a 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 the locking state, and the locking mechanism 1 The door is unlocked by applying a release displacement to the door.

Further, the manual operation mechanism 6 according to the present invention for manually operating the lock mechanism 1 uses a key cylinder 7 provided on a door (not shown) as a manual operation source. A rotor 9 is rotatably provided in a rotor case 8 of the key cylinder 7, and an ignition key 10 can be inserted into the rotor 9 from a key insertion opening 9a. The rotor 9 is rotated by the ignition key 10 from the neutral position in the locking direction indicated by arrow A and the unlocking direction indicated by arrow B opposite thereto. The rotational movements of the rotor 9 in the lock direction and the lock release direction are given to the lock mechanism 1 via the link mechanism 11 as a lock displacement and a 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 revolving arms 12 and 13 thereof. The upper rod 14 and the lower rod 15 are provided so as to connect the two. Then, when the rotor 9 is rotated in the lock direction indicated by arrow A and the rotation arm 12 is rotated in the same direction, the upper rod 14 is moved in the pulling direction indicated by arrow C. When the rotor 9 is pivotally operated in the unlocking direction indicated by the arrow B and the pivot arm 12 pivots in the same direction, the upper rod 14 is moved in the pushing direction indicated by the arrow D opposite to the arrow C. Is configured.

An inhibit mechanism 16 is provided between the upper rod 14 and the lower rod 15. When the rotor 9 is rotated in the unlocking direction, the inhibit mechanism 16 causes the displacement in the pushing direction of the upper rod 14, which is a constituent member of the manual operation mechanism 6 on the rotor 9 side, to be the same as that of the manual operation mechanism 6. It is transmitted to the lower rod 15, which is a component of the lock mechanism 1 side, or is prevented from being transmitted to the lower rod 15.

1 to 3 showing the specific structure of the inhibit mechanism 16, a reference numeral 17 denotes a bifurcated frame body integrally provided on the upper end portion of the lower rod 15, and the frame body 17 has a base portion side. A lower end portion of the upper rod 14 is slidably inserted into the formed horizontal plate portion 17a. A large diameter portion 14a is formed at the lower end portion of the upper rod 14, and the large rod portion 14a prevents the upper rod 14 from coming off.

The rectangular frame-shaped engaging member 18 arranged in the frame body 17 has both side portions rotatably supported by the both side portions of the frame body 17 via shafts 18 a, respectively. The upper rod 14 is inserted through the inside of the member 18. Engaging projections 19 and 19 are provided inwardly on both upper and lower horizontal rail portions of the engaging member located on both sides of the upper rod 14, and these engaging projections 19 and 19 are protruded inward. Correspondingly, engaging recesses 20, 20 are formed on both sides of the upper rod 14.

An electromagnet 23, which is formed by winding a coil 22 around a ring-shaped yoke 21, is attached to the upper portion of the frame body 17. Inside the yoke 21 of the electromagnet 23, for example, a plastic plunger 24 as a driving member slidably supported by the upper rod 14 is provided. Permanent magnets 25, 26 are provided on the large-diameter portions 24a, 24b on the upper and lower sides of the plunger 24, and the polarities of the permanent magnets 25, 26 are set to be upside down as shown in the drawing. There is.

The coil 22 of the electromagnet 23 is driven by a DC power source, and the polarity of the DC power source applied to the coil 22 can be reversed. When DC power is applied to the coil 22 so that the upper side of the yoke 21 becomes the S pole and the lower side becomes the N pole, the repulsive force acting between the yoke 21 and the permanent magnet 25 and the permanent magnet 26, and the attraction. The force causes the plunger 24 to slide upward. On the contrary, when DC power is applied to the coil 22 so that the upper side of the yoke 21 becomes the N pole and the lower side becomes the S pole, the attractive force and the repulsive force acting between the yoke 21 and the permanent magnets 25, 26. Causes the plunger 24 to slide downward. After the plunger 24 moves upward and downward, the coil 22 is cut off, but the large-diameter portions 24a and 24b are attracted to the yoke 21 by the magnetic force of the permanent magnets 25 and 26. It is held in the position moved up and down.

The plunger 24 is connected to the engaging member 18 via a link 27. When the plunger 24 moves upward and downward, the engaging member 18 moves in the engaging direction indicated by arrow E and The engaging projection 19 is engaged with the engaging recess 20 of the upper rod 14 and is released from the engagement by rotating in the engagement releasing direction indicated by the arrow F.

Then, as shown by the solid line in FIG. 1, when the engagement projection 19 is engaged with the engagement recess 20, the upper rod 14 which is a component member on the rotor 9 side and the lower rod which is a component member on the lock mechanism 1 side. The rod 15 and the rod 15 are connected via the engaging member 18. In this connected state, when the upper rod 14 moves in the pushing direction indicated by the arrow D, the movement displacement is transmitted to the lower rod 15, and the lower rod 15 moves in the same direction to move the revolving arm 13 with the arrow G. The lock mechanism 1 is swung in the direction to release the lock mechanism 1.

Further, as shown by the chain double-dashed line in FIG. 1, when the engagement projection 19 is released from the engagement recess 20, the connection between the upper rod 14 and the lower rod 15 is cut off. Becomes In this cutoff state, even if the upper rod 14 moves in the pushing direction, the upper rod 14 only slides by itself, and the displacement thereof is not transmitted to the lower rod 15. Therefore, even if the rotor 9 is rotated in the unlocking direction, the door is not unlocked.

From the above, the link mechanism 11 causes the link mechanism 11 to perform the releasing displacement based on the rotation of the rotor 9 in the unlocking direction only when the engaging member 18 of the inhibit mechanism 16 is in the connected state. It will be given and the lock will be released. The engaging member 18 is configured to be in the interrupted state shown by the chain double-dashed line in FIG. 1 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 rotationally operated in the locking direction shown by the arrow A, the inhibit mechanism 16 is in either the connected state or the disconnected state. Even if there is, the movement of the upper rod 14 in the pulling direction is transmitted to the lower rod 15 via the frame body 17. Then, when the lower rod 15 moves in the pulling direction indicated by the arrow C, the revolving arm 13 revolves in the direction opposite to the arrow G, and the lock mechanism 1 is given a lock displacement. Therefore, when the rotor 9 is rotated in the lock direction, the lock mechanism 1 can be locked regardless of whether the engagement member 18 is in the connected state or the disconnected state.

Therefore, the ignition key 10 is provided with a transmitter (not shown) as a lock release signal generating means, and as shown in FIG. 4, a lock-side transmitter for operating the transmitter is operated. An operation button 28 and an unlock-side operation button 29 are provided. Although not shown, the ignition key 10 houses a battery, and the transmitter uses the battery as a power source.

When the operation buttons 28 and 29 are operated, the transmitter is operated to transmit a lock command and an unlock command from the ignition key 10 as an air propagation signal, for example, a radio signal. .. Then, the radio signal is received by the antenna 30 of the vehicle shown in FIG. The radio signal is composed of 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. ing.

The radio wave signal received by the antenna 30 is transmitted to the code discriminating circuit 31 as a received signal discriminating means. The code discriminating circuit 31 discriminates whether the code of the received radio wave signal is a specific code defined for the vehicle and whether the code is a lock command or an unlock command. If the code is a 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. In response to the unlock command, the unlocking electromagnet 4 of the electric operation mechanism 2 is energized to cause the locking mechanism 1 to unlock, and the coil 22 of the electromagnet 23 of the inhibit mechanism 16 is connected to the yoke 21. The engagement member 18 is connected by energizing so that the upper side is the S pole and the lower side is the N pole.

On the other hand, the unlocking electromagnet 4 of the electric operation 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, as shown in FIG. 6, a shutter 32 that is opened by inserting the ignition key 10 is provided in the key insertion opening 9a of the rotor 9. A shutter switch 33 that operates in conjunction with the opening operation of the shutter 32 is provided, and the shutter switch 33 functions as a detection unit that detects that the ignition key 10 is inserted into the rotor 9. Is configured.

Further, as shown in FIG. 7, a projecting piece 9b is projectingly provided on the rear end portion of the rotor 9. The rotor case 8 includes a forward rotation detection switch 34, which is, for example, a proximity switch, as signal generating means for detecting that the rotor 9 has been rotated from the neutral position in the positive lock direction and the reverse lock release direction. And a reverse rotation detection switch 35.

The detection signals of the shutter switch 33, the forward rotation detection switch 34, and the reverse rotation detection switch 35 are input to a rotor rotation pattern determination circuit 36 as a rotor rotation pattern determination means, as shown in FIG. The rotor rotation pattern determination circuit 36 is provided with the normal rotation detection switch 34 and the reverse rotation detection switch 34 while the detection signal is input from the shutter switch 33, 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 rotation detection switch 35 operates, it is detected in what pattern the rotor 9 is rotated. Then, the rotor rotation pattern determination circuit 36 energizes the unlocking electromagnet 4 of the electric operation mechanism 2 when the detected rotation pattern of the rotor 9 matches the specific rotation pattern defined for the vehicle. Is configured to.

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

It is assumed that the driver operates the lock-side operation button 28 of the ignition key 10 to lock the door when the driver leaves the vehicle. Then, a lock command is issued from the ignition key 10 as a radio wave signal, and the radio wave signal is received by the antenna 30 and transmitted to the code discrimination circuit 31. The code discriminating circuit 31 supplies electricity to the lock electromagnet 3 of the electric operating 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 in conjunction with the lock operation of the lock mechanism 1, the electromagnet 23 of the inhibit mechanism 16 is energized to disconnect the engagement member 18. Put in a state.

Now, in order to unlock the door to drive the automobile, the operation button 29 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 wave signal, and the radio wave signal is decoded by the code discrimination circuit 31 in the same manner as described above. When the radio signal is the signal of the specific code, the code discriminating circuit 31 energizes the unlocking electromagnet 4 of the electric operating mechanism 2 and energizes the electromagnet 23 of the inhibit mechanism 16. The engaging member 18 is brought into a connected state. When the lock releasing electromagnet 4 is energized, the lock mechanism 1 is released and the door is unlocked.

When the radio signal is not the specific code, the code determination circuit 31 does not energize the unlocking electromagnet 4 and does not energize the electromagnet 23 of the inhibit mechanism 16. Therefore, the lock mechanism 1 remains locked and the door cannot be opened.

By the way, when the door is locked, it is assumed that a person other than the owner tries to unlock the door and operates the key cylinder 7 to rotate the rotor 9 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 engaging member 18 is in the blocking state shown by the chain double-dashed line in FIG. 1, the upper rod 14 slides alone, and the movement displacement thereof 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 locked and the door cannot be opened.

Therefore, unless the radio signal emitted from the ignition key 10 is a specific code, the engaging member 18 cannot be switched to the connected state, and therefore even if the manual operation mechanism 6 is provided, The door cannot be unlocked illegally by the operating mechanism 6.

On the other hand, when the lock releasing electromagnet 4 of the electric operation mechanism 2 fails, the lock releasing electromagnet 4 cannot release the lock of the lock mechanism 1. In this 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, similarly to the above, the electromagnet 23 of the inhibit mechanism 16 is energized to bring the engaging member 18 into the connected state.

Therefore, 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 displacement in the pushing direction is transmitted to the lower rod 15 via the engaging member 18 in the connected state, The lower rod 15 is moved in the pushing direction. By the 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 operates to unlock, and unlocks the door. Therefore, even if the electric operation mechanism 2 fails, the lock mechanism 1 can be unlocked by the manual operation mechanism 6.

Further, when the battery, which is the power source of the oscillator, is consumed due to long-term use and power is lost, it becomes impossible to transmit a radio signal from the ignition key 10. For this reason, 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, and the rotor 9 is rotated in the forward and reverse directions with a specific rotation pattern. Then, detection signals are output from the forward rotation detection switch 34 and the reverse rotation detection switch 35, and the rotor rotation pattern determination circuit 36 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 36 energizes the unlocking electromagnet 4 of the electric operation mechanism 2, whereby the lock mechanism 1 is operated. It unlocks and unlocks the door.

In the above-described embodiment, the inhibit mechanism 16 is configured to be connected by the radio signal of the lock release command, but the engagement member 18 is connected by the radio signal of the code different from the lock release command. You may make it a connected state.

Further, in the above embodiment, in order to deal with the consumption of the battery, when the rotation pattern of the rotor 9 has a specific pattern, the rotor rotation pattern determination circuit 36 causes the unlocking electromagnet of the electric operation mechanism 2. 4 is energized to release the lock, but this may be configured to energize the electromagnet 23 of the inhibit mechanism 16 to bring the engagement member 18 into the connected state and manually unlock.

Furthermore, in the above embodiment, the airborne signal is a radio wave signal, but it may be an ultrasonic wave signal, an infrared signal, etc., and the unlock signal generating means is not limited to the transmitter, but may be, for example, A large number of fine holes are formed in the ignition key 10, while a light emitting / receiving device is provided on the key cylinder 7 side. When the ignition key 10 is inserted into the key cylinder 7, the light passing through the fine holes is received and a specific signal is received. It may be configured to emit.

Further, the functions of the code discriminating circuit 31 and the rotor rotation pattern discriminating circuit 36 may be performed by program control by a microcomputer.

8 and 9 show other different embodiments of the inhibit mechanism according to the present invention.

In the embodiment shown in FIG. 8, a plunger 37 as a drive member is slidably supported on the upper rod 14, and a permanent magnet 38 is attached to the plunger 37, while the plunger 37 is positioned on both upper and lower sides of the plunger 37. The electromagnets 39 and 40 are attached to the frame body 17, and the plunger 37 is moved upward by energizing both electromagnets 39 and 40 so as to generate an attractive force on the upper side and a repulsive force on the lower side between the permanent magnets 38. Then, the engaging projection 19 of the engaging member 18 is engaged with the engaging recess 20 of the upper rod 14, and the electromagnets 40 are energized in the opposite manner to move the plunger 37 downward. The engaging projection 19 is configured to be removed from the engaging recess 20.

In FIG. 8, the permanent magnet 38 of the plunger 37 is omitted, the plunger 37 is made of iron instead, and the electromagnet 39 is energized to move the plunger 37 upward or to the electromagnet 40. After energizing and moving the plunger 37 downward, the electromagnet 39 or the electromagnet 40 may be energized continuously.

Further, in the embodiment of FIG. 9, a coil 41 is wound around a plunger 41 as a driving member to form an electromagnet 43, while a permanent magnet is attached to the frame 17 so as to be positioned on both upper and lower sides of the plunger 41. 44 and 45 are attached, and the polarity of the direct current power source applied to the electromagnet 43 is reversed to move the plunger 41 upward and downward.

Even with the configuration shown in FIGS. 8 and 9, it is possible to obtain the same effect as that of the first embodiment.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and is not limited to, for example, an automobile door unlocking device, but is widely applicable to door unlocking devices in general. Various modifications can be implemented without departing from the gist of the invention.

[0049]

[Effect of the device]

 As described above, according to the present invention, the manually operated mechanism is provided with a shut-off state and a lock mechanism that prevent the lock mechanism from being disengaged when the rotor of the key cylinder is rotated in the lock release direction. By providing an inhibit mechanism for switching to the connected state that gives the release displacement, and when the signal emitted from the unlock signal generating means is a specific signal, the inhibit mechanism is configured to be in the connected state, so that the signal is generated. If the signal is different from the specific signal even if it is not issued or is emitted, the inhibit mechanism is left in the cutoff state, and therefore the lock mechanism is released even when the rotor is rotated. This is an excellent effect that there is no risk that the door will be unlocked by unauthorized means.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an inhibit mechanism showing an embodiment of the present invention.

FIG. 2 is a perspective view of an inhibit mechanism.

FIG. 3 is a side view of the inhibit mechanism.

FIG. 4 is a perspective view of a manual operation mechanism.

FIG. 5 is a mechanical and electrical coupling configuration diagram.

FIG. 6 is a perspective view showing a related configuration of a shutter of a rotor and its switch.

FIG. 7 is a switch configuration diagram for detecting a rotation direction of a rotor.

FIG. 8 is a vertical sectional view of an inhibit mechanism according to another embodiment of the present invention.

FIG. 9 is a vertical sectional view of an inhibit mechanism showing still another embodiment of the present invention.

[Explanation of symbols]

1 is a lock mechanism, 2 is an electric operation mechanism, 3 is a locking electromagnet, 4 is an unlocking electromagnet, 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, 12 and 13 are swivel arms, 1
4 is an upper rod, 15 is a lower rod, 16 is an inhibit mechanism, 17 is a frame, 18 is an engaging member, 23 is an electromagnet, 24
Is a plunger (driving member), 25 and 26 are permanent magnets, 2
7 is a link, 31 is a code discrimination circuit, 33 is a shutter switch, 34 and 35 are forward rotation and reverse rotation detection switches, 3
6 is a rotor rotation pattern discrimination circuit, 37 is a plunger (driving member), 38 is a permanent magnet, 39 and 40 are electromagnets,
41 is a plunger (driving member), 43 is an electromagnet, 44,
45 is a permanent magnet.

Claims (1)

[Scope of utility model registration request] 1. A manual operation mechanism is provided, wherein a key is inserted into a rotor of a key cylinder and the rotor is rotated in an unlocking direction so that a lock displacement of a door is released by the rotation of the rotor to release the lock. When the rotor is reciprocated, the rotor is switched between a connection state for connecting the rotor-side component member of the manual operation mechanism and a lock mechanism-side component member and a disconnection state for disconnecting the two components. When is rotated in the unlocking direction, the displacement of the rotor-side component is transmitted to the lock-mechanism-side component in the coupled state to give the unlocking displacement to the lock mechanism. An engaging member that prevents transmission to the component member on the lock mechanism side, and an engaging member that is connected to this engaging member via a link and reciprocated by an electromagnet. When the return mechanism is provided with a drive member that makes the engaging member in the blocking state when the lock mechanism is in the locked state, and when the received signal is a specific signal, the engaging member of the inhibit mechanism is A door lock releasing device, which is provided with a reception signal discriminating means for driving the electromagnet so as to be in a connected state.