JP2007277927A - Key device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a key device capable of being compacted. <P>SOLUTION: When a normal mechanical key 80 is installed in a key body 50, a boundary surface between pin tumblers 63 to 65 and pin tumblers 73 to 75 coincides with a boundary surface between a case 60 and a slider 70, and installation of its mechanical key 80 to the key body 50 is permitted. When the normal mechanical key 80 is installed in the key body 50, a switch 91 is turned off by interposing the pin tumbler 73 between switch contact points 69a and 69b. Thus, the pin tumbler 73 constituting a collating mechanism for mechanically collating the mechanical key to the key body 50, plays a role as a movable contact point of the switch 91. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a key device in which a mechanical key is attached to a key body.

  In recent years, there has been proposed an electronic key system that permits an operation of a controlled object by an operation control device when a corresponding communication terminal (electronic key) is used. In Patent Document 1, when the holder of the corresponding electronic key (portable device) enters a predetermined area outside the vehicle, the operation control device (transmission / reception device on the vehicle side) automatically permits the unlocking of the vehicle-mounted door. An electronic key system (vehicle remote control device) is disclosed.

  In this type of electronic key system, in order to monitor the approach of the corresponding electronic key holder to the vehicle, a request signal is transmitted from the operation control device to a predetermined area outside the vehicle while the in-vehicle door is locked. When the request signal is received by the electronic key, a signal (ID code signal) including an ID code individually set for each electronic key is transmitted from the electronic key. When the ID code signal is received by the operation control device, the operation control device determines whether or not the ID code included in the ID code signal matches the reference ID code. When the two ID codes match, the operation control device recognizes that the corresponding electronic key has been used and permits the unlocking of the vehicle-mounted door. Then, when the door outside handle is touched in such a state that unlocking of the vehicle-mounted door is permitted, the vehicle-mounted door is unlocked.

  An electronic key provided for such an electronic key system includes a battery as a power source for transmitting an ID code signal in response to a request signal transmitted from the operation control device. For this reason, when the battery has run out of the electronic key, the vehicle-mounted door is not allowed to be unlocked even if the user holds the electronic key and approaches the vehicle.

Therefore, this type of electronic key is used together with a mechanical key suitable for the door cylinder, and when the battery runs out as described above, the mechanical key can be used to unlock the vehicle-mounted door. ing. In general, a single key device in which both the electronic key and the mechanical key are accommodated in the key body is carried by the user. Therefore, this type of key device is called a portable device. Has been.
Japanese Patent Laid-Open No. 2002-029385 (paragraph numbers 0002 to 0007)

  By the way, when you ask someone else to park the key device, the mechanical key (regular mechanical key) is removed from the key device and another mechanical key that is not compatible with the door cylinder of your vehicle is installed. Such a thing can be considered. Therefore, in order to be able to immediately notice such a situation, it is conceivable to provide a collation mechanism for mechanically collating the mechanical key with the key body.

  And if it is assumed that only regular mechanical keys are allowed to be attached after such verification, the mechanical key is authorized only by glanced at whether or not the mechanical key is attached to the key body. It can be easily identified whether or not there is. In short, the security level can be improved by providing a verification mechanism.

  Also, the security level can be improved by providing a difference in the functions set for the key device between the key device to which the regular mechanical key is attached and the key device that is not. That is, there is provided a state identifying switch that is turned on when a regular mechanical key is attached and turned off otherwise. Different functions may be set for the key device when the state identification switch is ON and when the state identification switch is OFF. In short, the security level can be improved by providing a state identification switch.

However, if the collation mechanism and the state identification switch are provided separately, the key device becomes large.
The present invention has been made paying attention to such problems, and an object thereof is to provide a key device that can be miniaturized.

  In order to achieve the above object, the invention according to claim 1 is a key device in which a mechanical key is attached to a key body. When a mechanical key that fits the key body is attached to the key body, When the mechanical key that is not compatible with the key body is attached to the key body, the mechanical key is displaced to the attachment prevention position that prevents the mechanical key from being attached to the key body. When the mechanical key suitable for the key body is not attached to the key body, the switch is opened, and when the mechanical key suitable for the key body is attached to the key body, the engagement member Displacement to the mounting allowable position causes the engagement member to be interposed between the switch contacts so that the switch is closed And a switch, and when the state identification switch is in a state of the switch opens, between when the state identification switch is closed switch state, and its gist that the different functions are set to the key device.

  According to this configuration, when a regular mechanical key that fits the key body is mounted on the key body, the engaging member is displaced to the mounting permission position and the mounting is permitted. As a result, the engagement member is interposed between the switch contacts, and the state identification switch is closed. That is, the engaging member constituting the collating mechanism for mechanically collating the mechanical key with respect to the key body serves as a movable contact of the state identifying switch. For this reason, unlike the configuration in which the collating mechanism and the state identification switch are separately provided, the key device does not increase in size because one member serves two functions. Therefore, the size can be reduced.

  According to a second aspect of the present invention, in the key device according to the first aspect, monitoring is performed to monitor whether the state identification switch is in an open state or whether the state identification switch is in a closed state. And the state identification switch based on the monitoring result of the monitoring means, the key device has different functions depending on whether the state identification switch is in the open state or the state identification switch in the closed state. The gist of the invention is that it includes control means for setting.

  According to this configuration, by providing the control means, different functions are provided to the key device when the state identification switch is in the open state and when the state identification switch is in the closed state. Is set. Therefore, a function suitable for each case can be set in the key device after determining whether a regular mechanical key is attached to the key body or not.

  According to a third aspect of the present invention, in the key device according to the first or second aspect, the key device includes a power source for supplying power to each part of the key device, and an engagement member is interposed between the switch contacts for state identification. The gist of the invention is that a closed loop is formed in a power supply path for supplying power from the power source to each part of the key device when the switch is in the closed state.

  According to this configuration, the engagement member is interposed between the switch contacts, and the state identification switch is closed, so that a closed loop is formed in the power supply path for supplying power from the power source to each part of the key device. Thus, power supply to each part of the key device is allowed, and the key device functions effectively. Therefore, it is simple because whether or not the key device functions effectively is determined for each state of the state identification switch.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the present invention, the size can be reduced.

Hereinafter, an embodiment in which the present invention is embodied in a key device for use in an automobile will be described.
As shown in FIG. 1, an electronic key system 1 is applied to the automobile of this embodiment. The electronic key system 1 includes a portable device 2 possessed by a vehicle owner and a security device 3 provided on the vehicle side, and bidirectional communication between the portable device 2 and the security device 3 is possible. is there.

  The portable device 2 has a reception function by wireless communication and a transmission function by wireless communication, and includes a reception antenna 21, a reception circuit 22, a microcomputer 23, a transmission circuit 24, a transmission antenna 25, and a battery 26. The receiving antenna 21 is a medium for receiving a request signal transmitted from the security device 3. The reception circuit 22 demodulates the request signal received by the reception antenna 21 to generate a reception signal and outputs the reception signal to the microcomputer 23.

  The microcomputer 23 includes a nonvolatile memory 23a. In the memory 23a, an ID code (ID code of the portable device 2) set individually for each portable device 2 is stored. When the reception signal is input from the reception circuit 22, the microcomputer 23 generates a signal (ID code signal) including the ID code of the portable device 2 and responds to the request signal, and transmits the ID code signal to the transmission circuit 24. Output to. The transmission circuit 24 modulates the ID code signal input from the microcomputer 23 into a radio wave having a predetermined frequency (300 MHz in this embodiment). The transmission antenna 25 is a medium for transmitting the ID code signal modulated by the transmission circuit 24.

The battery 26 includes a button type battery (primary battery) that functions as a power source for transmitting an ID code signal in response to a request signal.
The security device 3 has a transmission function by wireless communication and a reception function by wireless communication, and includes a transmission circuit 31, a transmission antenna 32, a reception antenna 33, a reception circuit 34, and a verification control device 35. The transmission circuit 31 modulates the request signal input from the verification control device 35 into a radio wave having a predetermined frequency (134 KHz in this embodiment). The transmission antenna 32 is a medium for transmitting the request signal modulated by the transmission circuit 31, and includes an out-of-vehicle transmission antenna 32a and an in-vehicle transmission antenna 32b.

  Here, as indicated by a two-dot chain line in FIG. 2, the request signal from the outside transmission antenna 32a is within the range of a region (predetermined region A32 outside the vehicle) that reaches a point about 1 m away from the door outside handle outside the vehicle. Sent. In addition, as shown by a two-dot chain line in FIG. 3, the request signal from the in-vehicle transmission antenna 32b is transmitted within a range of a region (predetermined region B32 in the vehicle) that extends over substantially the entire interior of the vehicle and hardly extends outside the vehicle. The

  As a result, bidirectional communication between the portable device 2 and the security device 3 is possible within the range of the predetermined area A32 outside the vehicle or the predetermined area B32 inside the vehicle. That is, the request signal is a trigger signal for establishing bidirectional communication between the portable device 2 and the security device 3. Accordingly, when the portable device 2 is brought into the range of the predetermined area A32 outside the vehicle or the predetermined area B32 inside the vehicle and the request signal is transmitted, the request signal is received by the portable device 2. Thus, an ID code signal is transmitted from the portable device 2.

  The receiving antenna 33 is a medium for receiving the ID code signal transmitted from the portable device 2 in response to the request signal. The reception circuit 34 demodulates the ID code signal received by the reception antenna 33 to generate a reception signal, and outputs the reception signal to the collation control device 35.

  The verification control device 35 includes a nonvolatile memory 35a. The memory 35a stores the same ID code (reference ID code) as the ID code of the corresponding portable device 2. The collation control device 35 outputs a request signal to the transmission circuit 31 in a state where the vehicle-mounted door is locked in order to monitor the approach of the vehicle by the owner of the corresponding portable device 2 (approach to the predetermined area A32 outside the vehicle). To do. That is, in this case, the collation control device 35 executes vehicle exterior communication control. As a result, a request signal is transmitted from the outside transmission antenna 32a.

  The collation control device 35 determines whether or not the ID code included in the received signal matches the reference ID code when the received signal is input from the receiving circuit 34 based on the vehicle exterior communication control. That is, in this case, the collation control device 35 executes ID code collation. And when both ID codes correspond by ID code collation, while the collation control apparatus 35 recognizes that the corresponding portable device 2 was utilized, a door unlock permission signal is output to the door control apparatus 41 in this case To do. As a result, when the door outside handle is touched in such a state where unlocking of the vehicle-mounted door is permitted, the door control device 41 unlocks the vehicle-mounted door.

  Further, the collation control device 35 outputs a request signal to the transmission circuit 31 when the vehicle-mounted door is opened and closed in order to monitor boarding by the holder of the corresponding portable device 2 (entrance to the predetermined area B32 in the vehicle). That is, in this case, the collation control device 35 executes in-vehicle communication control. As a result, a request signal is transmitted from the in-vehicle transmission antenna 32b.

  Based on the in-vehicle communication control, the collation control device 35 determines whether or not the ID code included in the received signal matches the reference ID code when the received signal is input from the receiving circuit 34. That is, in this case, the collation control device 35 executes ID code collation. Then, the collation control device 35 recognizes that the corresponding portable device 2 has been used when both ID codes match by ID code collation, and outputs an engine start permission signal to the engine control device 42 in this case. . As a result, when the engine switch is operated in a state where the start of the in-vehicle engine is permitted in this way, the in-vehicle engine is started by the engine control device 42.

  As described above, when using a vehicle to which the electronic key system 1 is applied, the portable device 2 is used as an electronic key, which simplifies operations when getting on or starting the engine. When the battery 26 is exhausted, the portable device 2 cannot be used as an electronic key. Therefore, the portable device 2 is provided with a mechanical key so that the automobile can be used even when the battery runs out.

Hereinafter, characteristic points of the present embodiment related to the mechanical key will be described.
As shown in FIGS. 4 to 6, the key body 50 is formed in a square cylinder shape by a case 60 made of a synthetic resin and a slider 70 that is slidably supported with respect to the case 60. A hemispherical fitting protrusion 61 is provided on the side surface of the case 60 facing the slider 70, and a fitting recess 71 in which the fitting protrusion 61 is fitted is formed on the side surface of the slider 70 facing the case 60. Is provided. As shown in FIG. 4, the slider 70 has a first position where the fitting projection 61 is fitted in the fitting recess 71, and the fitting projection 61 is fitted as shown in FIGS. 5 and 6. It can be slid between the second position not fitted in the mating recess 71.

  A substrate housing portion 62 is formed inside the case 60, and the substrate housing portion 62 is omitted in FIGS. 4 to 6, but the receiving antenna 21, the receiving circuit 22, the microcomputer 23, and the transmitting circuit are omitted. 24, a printed circuit board (not shown) on which a transmission antenna 25 and a battery 26 are mounted is accommodated. That is, the board storage unit 62 stores various electrical components necessary for using the portable device 2 as an electronic key. The case 60 is provided with a plurality (three in the present embodiment) of pin tumblers 63 to 65 and three springs 66 to 68 that urge the pin tumblers 63 to 65 toward the slider 70. .

  A key accommodating portion 72 is formed inside the slider 70, and a key plate 81 of the mechanical key 80 is accommodated in the key accommodating portion 72. The slider 70 is provided with the same number (three in this case) of pin tumblers 73 to 75 as the pin tumblers 63 to 65 provided on the case 60. The key plate 81 is provided with engagement holes 83 to 85 with which the tip portions of the pin tumblers 73 to 75 are engaged.

  As shown in FIG. 4, the pin tumblers 73 to 75 are engaged with the engagement holes 83 to 85 of the key plate 81 when the slider 70 is in the first position, The end surface is in contact with the side surface of the case 60. At this time, the tip surfaces of the pin tumblers 63 to 65 are elastically brought into contact with the side surface of the slider 70 by the urging force of the springs 66 to 68.

  On the other hand, as shown in FIG. 5, the pin tumblers 73 to 75 have the slider 70 at the second position, and when the key plate 81 is accommodated in the key accommodation portion 72, the tip portions are engaged holes 83 to 83. The base end surface is in contact with the front end surfaces of the pin tumblers 63 to 65 in a manner that resists the urging force of the springs 66 to 68. At this time, the boundary surfaces between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 coincide with the boundary surface between the case 60 and the slider 70, thereby allowing the slider 70 to slide with respect to the case 60. .

  On the other hand, as shown in FIG. 6, the pin tumblers 73 to 75 have the base end surfaces of the springs 66 to 68 when the slider 70 exists in the second position and the key plate 81 is not accommodated in the key accommodation portion 72. While being pressed by the front end surfaces of the pin tumblers 63 to 65 by the urging force, the front end portion is advanced to a position where it faces the key accommodating portion 72. At this time, the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 does not coincide with the boundary surface between the case 60 and the slider 70, thereby preventing the slider 70 from sliding on the case 60. Yes.

  Here, two switch contacts 69 a and 69 b are provided on the printed board accommodated in the board accommodating portion 62 so as to slightly face the slider 70 from the case 60. As shown in FIG. 4, when the slider 70 is in the first position, the pin tumbler 73 contacts the switch contacts 69a and 69b, and as shown in FIG. 5 and FIG. When the pin tumbler 73 is located at the position 2, the pin tumbler 73 is prevented from coming into contact with the switch contacts 69a and 69b. The pin tumbler 73 is made of a metal that is a conductive material.

  Therefore, as shown in FIG. 4, when the slider 70 exists in the first position, the switch contacts 69a and 69b are electrically connected by the pin tumbler 73 being interposed between the switch contacts 69a and 69b. It has become so. That is, at this time, the pin tumbler 73 functions as a conductive member that electrically connects the switch contacts 69a and 69b. On the other hand, as shown in FIG. 5 and FIG. 6, when the slider 70 exists at the second position, the pin tumbler 73 is not interposed between the switch contacts 69a and 69b, so that the switch contacts 69a and 69b are electrically connected. It is not connected.

  As described above, in this embodiment, the contact point type switch 91 is configured by the switch contacts 69a and 69b (switch fixed contacts) and the pin tumbler 73 (switch movable contact). The microcomputer 23 monitors whether the switch contacts 69a and 69b are electrically connected or whether the switch contacts 69a and 69b are not electrically connected. In other words, the microcomputer 23 monitors whether the switch 91 is in a switch closed state (switch ON) or whether the switch 91 is in a switch open state (switch OFF). That is, the microcomputer 23 corresponds to a monitoring unit that monitors whether the switch 91 is in the open state or whether the switch 91 is in the closed state.

Next, the operation of this embodiment will be described.
Now, in the state where the mechanical key 80 is removed from the key body 50, as shown in FIG. 6, the slider 70 exists at the second position. At this time, the tip portions of the pin tumblers 73 to 75 are advanced to a position where they face the key accommodating portion 72 by the urging force of the springs 66 to 68. When the mechanical key 80 is attached to the key body 50 from the state shown in FIG. 6, the key plate 81 is inserted into the key housing portion 72.

  Then, along with the insertion, the key plate 81 interferes with the tip portions of the pin tumblers 73 to 75. However, the force when inserting the key plate 81 overcomes the urging force of the springs 66 to 68. The pin tumblers 73 to 75 are retracted according to the surface shape of the key plate 81 against the urging force of the springs 66 to 68. The slider 70 is slid with respect to the case 60 as the key plate 81 is inserted. However, the pin tumblers 63 to 65 interfere with the wall portion of the case 60 to prevent it.

  Then, when the insertion of the key plate 81 proceeds and eventually the tip portion of the key plate 81 reaches the innermost portion of the key accommodating portion 72, the pin tumblers are inserted into the engagement holes 83 to 85 as shown in FIG. The front-end | tip part of 73-75 comes to be engaged. At this time, the boundary surfaces of the pin tumblers 63 to 65 and the pin tumblers 73 to 75 are made to coincide with the boundary surfaces of the case 60 and the slider 70, thereby allowing the slider 70 to slide with respect to the case 60. Therefore, after that, when the mechanical key 80 is pushed in the same direction as the insertion of the key plate 81, the mechanical key 80 and the slider 70 are slid integrally with respect to the case 60.

  Here, both the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85 are provided in a pattern set individually for each mechanical key. In the present embodiment, the depth pattern of the engagement holes 83 to 85 is individually set for each mechanical key, and the pin tumblers 63 to 65 and the pin tumblers 73 to 75 are set according to the depths of the engagement holes 83 to 85. The position of the boundary surface is determined. Only when a regular mechanical key 80 that fits the key body 50 is attached, the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 is the boundary surface between the case 60 and the slider 70 as described above. It is supposed to match. In short, when the regular mechanical key 80 is mounted, the mounting is allowed, and when another mechanical key is mounted, the mounting is blocked.

  As shown in FIG. 5, when the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 coincides with the boundary surface between the case 60 and the slider 70, the pin tumblers 63 to 65 and 73 to 75 are It can be said that it exists in the mounting | wearing permissible position which permits mounting | wearing of the mechanical key 80 with respect to the key main body 50. FIG. On the other hand, as shown in FIG. 6, when the boundary surfaces between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 do not coincide with the boundary surfaces between the case 60 and the slider 70, the pin tumblers 63 to 65 and 73 to 75 are It can be said that it exists in the mounting | wearing prevention position which prevents mounting | wearing of the mechanical key with respect to the key main body 50. FIG. That is, in the present embodiment, the pin tumblers 63 to 65 and 73 to 75 correspond to engagement members that can be displaced over the mounting allowable position and the mounting blocking position.

  Further, in the present embodiment, the engagement holes 83 to 85 correspond to engaged portions that displace the pin tumblers 63 to 65 and 73 to 75 from the attachment blocking position to the attachment allowable position by engaging the pin tumblers 73 to 75. To do. In the present embodiment, the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85 specify whether or not the mechanical key attached to the key body 50 is compatible with the key body 50. An index means serving as an index is configured. In other words, the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85 constitute a collation mechanism for mechanically collating the mechanical key with the key body 50.

  Returning to this point, when the mechanical key 80 is pushed in as described above, the end surface of the slider 70 eventually interferes with the fitting protrusion 61. However, when the mechanical key 80 is further pushed, The mechanical key 80 is allowed to be pushed by bending the peripheral portion of the fitting protrusion 61 and the tip portion of the slider 70 by such pushing force. When the mechanical key 80 is further pushed in, the slider 70 is present at the first position as shown in FIG. 4. At this time, the fitting protrusion 61 is fitted into the fitting recess 71, Along with this, the bending of the case 60 and the slider 70 is released.

  As a result, the attachment of the mechanical key 80 to the key body 50 is completed in this way. The case 60 and the slider 70 are either when the case 60 or the slider 70 is bent during the attachment or not. The sliding resistance generated between the two is different. Accordingly, such a difference in sliding resistance appears as a feeling received by the operator, and as a result, when the mounting of the mechanical key 80 is completed, a feeling of moderation is given to the operator.

  FIG. 5 shows a state in which the slider 70 is present at the second position. This second position is located on the slider 70 and the sliding with respect to the case 60 is started, so that the slider 70 is in the second position. It is nothing but the slide start position where the installation of the mechanical key starts. On the other hand, FIG. 4 shows a state in which the slider 70 is present at the first position. This first position is located on the slider 70, and the slide with respect to the case 60 is finished, so It is nothing but the slide end position where the mechanical key is completely attached. That is, the slider 70 can slide over the slide start position (second position) shown in FIG. 5 and the slide end position (first position) shown in FIG.

  In the present embodiment, the fitting protrusion 61 and the fitting recess 71 constitute a moderation imparting unit that imparts a moderation feeling when the slider 70 is slid from the slide start position to the slide end position. Further, as shown in FIG. 4, when the slider 70 is slid in the direction opposite to the mounting direction from the state in which the fitting protrusion 61 is fitted in the fitting recess 71, naturally, An operating force deserving to release the fitting state is required. That is, unless such an operating force is applied, the slider 70 is not slid freely in the opposite direction. In other words, in the present embodiment, it can be said that the fitting protrusion 61 and the fitting recess 71 constitute holding means for holding the slider 70 existing at the slide end position at the slide end position.

  Incidentally, as shown in FIG. 4, when the slider 70 exists at the slide end position, the pin tumblers 63 to 65 elastically contact the side surfaces of the slider 70 with the urging forces of the springs 66 to 68. Has been. For this reason, when trying to slide the slider 70 in the direction opposite to the mounting direction from such a state, a sliding resistance corresponding to the contact force is generated. Therefore, this also prevents the slider 70 from being slid in the opposite direction. That is, in this embodiment, it can be said that the holding means is also configured by the pin tumblers 63 to 65 and the springs 66 to 68.

  As shown in FIG. 4, the pin tumblers 73 to 75 are engaged with the engagement holes 83 to 85 in the state where the mechanical key 80 is completely attached to the key body 50. The base end surface is in contact with the side surface of the case 60. Accordingly, this prevents the mechanical key 80 from falling off the slider 70. That is, in the present embodiment, the pin tumblers 73 to 75 correspond to drop-off prevention means for preventing the mechanical key 80 that has been attached to the key body 50 from dropping off the slider 70.

  When the mounting of the mechanical key 80 is completed in this way, the pin tumbler 73 is interposed between the switch contacts 69a and 69b. That is, in this case, the switch 91 that has been open until then is closed. Accordingly, the microcomputer 23 recognizes that the regular mechanical key 80 is attached to the key body 50.

  Then, in a state where the request signal is transmitted to the predetermined area A32 outside the vehicle, the owner of the portable device 2 to which the regular mechanical key 80 is attached approaches the automobile and enters the predetermined area A32 outside the vehicle. The request signal is received by the machine 2. Then, an ID code signal is transmitted from the portable device 2 in response to the request signal. In this embodiment, a regular key wearing state code indicating that the regular mechanical key 80 is worn is added at this time. The ID code signal is generated by the microcomputer 23, and such an ID code signal is transmitted from the portable device 2.

  When this ID code signal is received by the security device 3, the verification control device 35 executes ID code verification. When the received signal input from the receiving circuit 34 includes an ID code that matches the reference ID code and includes a normal key wearing state code, the verification control device 35 receives a normal mechanical key. It recognizes that the portable device 2 to which 80 is attached is used. Therefore, in this case, unlocking of the vehicle-mounted door is permitted, and the vehicle can be boarded by operating the door outside handle to open and close the vehicle-mounted door.

  When the vehicle-mounted door is opened and closed in this way, a request signal is transmitted to a predetermined area B32 in the vehicle. In such a state, when the owner of the portable device 2 to which the regular mechanical key 80 is attached gets into the vehicle and enters the predetermined area B32 in the vehicle, the request signal is received by the portable device 2. Then, the ID code signal is transmitted from the portable device 2 in response to the request signal. In this embodiment, the ID code signal to which the normal key wearing state code is added is transmitted from the portable device 2 in the same manner as before. Sent.

  When this ID code signal is received by the security device 3, the verification control device 35 executes ID code verification. When the received signal input from the receiving circuit 34 includes an ID code that matches the reference ID code and includes a normal key wearing state code, the verification control device 35 receives a normal mechanical key. It recognizes that the portable device 2 to which 80 is attached is used. Therefore, in this case, the start of the in-vehicle engine is permitted, and the engine can be started by operating the engine switch. Then, when using the portable device 2 to which the regular mechanical key 80 is mounted in this way, the user can use the automobile without any restriction after the engine is started. Yes.

Next, an operation when another mechanical key different from the regular mechanical key 80 (a mechanical key that does not match the key body 50) is attached to the key body 50 will be described.
In this case, until the stage where the key plate is inserted into the key housing portion 72 and the tip portion reaches the innermost portion of the key housing portion 72, the same as when the regular mechanical key 80 is attached to the key body 50. Transition to. In this case, however, the engagement hole depth pattern is different from that of the regular mechanical key 80 even though the key plate is provided with the same engagement holes as the engagement holes 83 to 85. Therefore, in this case, the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 coincides with the boundary surface between the case 60 and the slider 70, even if the tip portions of the pin tumblers 73 to 75 are engaged with the engagement holes. Never do. In short, in this case, the attachment of the mechanical key is prevented.

  As a result, the pin tumbler 73 is not interposed between the switch contacts 69a and 69b, the switch 91 remains open, and the microcomputer indicates that the regular mechanical key 80 is not attached to the key body 50. 23.

  Then, in a state where the request signal is transmitted to the predetermined area A32 outside the vehicle, the owner of the portable device 2 that is not equipped with the regular mechanical key 80 approaches the automobile and enters the predetermined area A32 outside the vehicle. The request signal is received by the machine 2. Then, an ID code signal is transmitted from the portable device 2 in response to the request signal. In this embodiment, a normal key non-attached state code indicating that the normal mechanical key 80 is not attached is added. The ID code signal thus generated is generated by the microcomputer 23, and such an ID code signal is transmitted from the portable device 2.

  When this ID code signal is received by the security device 3, the verification control device 35 executes ID code verification. When the received signal input from the receiving circuit 34 includes an ID code that matches the reference ID code and includes a normal key non-attached state code, the verification control device 35 receives a normal mechanical code. It is recognized that the portable device 2 to which the key 80 is not attached is used. Therefore, in this case, unlocking of the vehicle-mounted door is permitted, and the vehicle can be boarded by operating the door outside handle to open and close the vehicle-mounted door.

  For example, this is the case where another person is asked to park the portable device 2. That is, in such a case, in order to prevent others from opening the glove box that can be opened and closed by using the regular mechanical key 80, it is common to leave the portable device 2 with the regular mechanical key 80 removed. Done. Even in such a case, since various electrical components necessary for using the portable device 2 as an electronic key are housed in the case 60, other people can get on by holding such a portable device 2. It is like that.

  When the vehicle-mounted door is opened and closed in this way, a request signal is transmitted to a predetermined area B32 in the vehicle. In such a state, when the owner of the portable device 2 not wearing the regular mechanical key 80 gets into the vehicle and enters the predetermined area B32 in the vehicle, the request signal is received by the portable device 2. Then, the ID code signal is transmitted from the portable device 2 in response to the request signal. In this embodiment, the ID code signal to which the normal key non-attached state code is added is transmitted to the portable device 2 in the same manner as before. Sent from

  When this ID code signal is received by the security device 3, the verification control device 35 executes ID code verification. When the received signal input from the receiving circuit 34 includes an ID code that matches the reference ID code and includes a normal key non-attached state code, the verification control device 35 receives a normal mechanical code. It is recognized that the portable device 2 to which the key 80 is not attached is used. Therefore, in this case, the start of the in-vehicle engine is permitted, and the engine can be started by operating the engine switch. That is, in the above example, another person who has received a request for parking from the user himself / herself can start the engine prior to parking.

  However, when using the portable device 2 to which the regular mechanical key 80 is not attached as described above, the user (in this case, another person) is a portable person to which the regular mechanical key 80 is attached after the engine is started. The vehicle can be used in a manner that is restricted by the case where the machine 2 is used. In this embodiment, in such a case, the engine is stopped when 5 minutes have elapsed since the engine was started.

  The switch 91 is in the open state when the regular mechanical key 80 is not attached to the key body 50. Further, when the regular mechanical key 80 is mounted on the key body 50, the switch 91 is displaced between the switch contacts 69a and 69b by the displacement of the pin tumblers 63 to 65 and 73 to 75 to the mounting allowable positions. The switch is closed by being interposed. Accordingly, in the present embodiment, the switch 91 corresponds to such a state identification switch.

  In relation to this, when the regular mechanical key 80 is mounted on the key body 50, the user can use the automobile without any restrictions by possessing such a portable device 2. On the other hand, when the regular mechanical key 80 is not attached to the key body 50, the user can use the vehicle in a manner that is restricted by the travelable period when the portable device 2 is held. . Such a difference is caused by a difference between whether the microcomputer 23 generates an ID code signal including a normal key mounting state code or an ID code signal including a normal key non-mounting state code.

  In other words, in the present embodiment, the microcomputer 23 serves as a control unit that sets different functions for the portable device 2 when the switch 91 is in the closed state and when the switch 91 is in the open state. Equivalent to. In the present embodiment, the microcomputer 23 sets, for the portable device 2, functions that are restricted with respect to the functions that are set when the switch 91 is in the switch open state and the switch 91 is in the switch close state. is doing.

  In addition, when the switch 91 is in the closed state, an ID code signal including a normal key wearing state code is transmitted from the transmission antenna 25. On the other hand, when the switch 91 is in the open state, an ID code signal including a normal key non-installation state code is transmitted from the transmission antenna 25. That is, in this embodiment, the transmission circuit 24 and the transmission antenna 25 constitute a transmission unit that transmits such an ID code signal.

As described above, according to the present embodiment, the following operations and effects can be obtained.
(1) When the regular mechanical key 80 is mounted on the key body 50, the pin tumblers 63 to 65, 73 to 75 are displaced to the mounting allowable positions and the mounting is permitted. As a result, the pin tumbler 73 is interposed between the switch contacts 69a and 69b, and the switch 91 is closed. That is, the pin tumbler 73 that constitutes a collating mechanism for mechanically collating the mechanical key with the key body 50 serves as a movable contact of the switch 91. For this reason, unlike the configuration in which the collating mechanism and the switch 91 are separately provided, the portable device 2 is not increased in size because the pin tumbler 73 serves two functions. Therefore, the size can be reduced.

  (2) By providing the microcomputer 23, different functions are set for the portable device 2 when the switch 91 is in the open state and when the switch 91 is in the closed state. Therefore, the function suitable for each case can be set in the portable device 2 after determining whether the regular mechanical key 80 is attached to the key body 50 or not.

  (3) By providing the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85, when the regular mechanical key 80 is attached to the key body 50, another mechanical key is attached to the key body 50. Can be distinguished from the case of For this reason, even if the regular mechanical key 80 is removed from the portable device 2 and another mechanical key is attached, this can be immediately noticed. Therefore, the security level can be improved.

  (4) When the regular mechanical key 80 is attached to the key body 50, the attachment is permitted by the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85, and another mechanical key is attached to the key body 50. When mounted on the pin, the mounting is blocked by the pin tumblers 63 to 65, 73 to 75 and the engagement holes 83 to 85. That is, only the regular mechanical key 80 is the only key that can be attached to the key body 50. Therefore, it is possible to easily specify whether or not the mechanical key attached to the key body 50 is compatible with the key body 50 by simply glanced at whether or not the mechanical key is attached to the key body 50. it can.

  (5) When the regular mechanical key 80 is attached to the key body 50, the pin tumblers 73 to 75 are engaged with the engagement holes 83 to 85 of the mechanical key 80, so that all the pin tumblers 63 to 65, 73 to 75 is displaced from the mounting prevention position to the mounting allowable position. As a result, the mechanical key (in this case, the regular mechanical key 80) can be attached to the key body 50. On the other hand, when another mechanical key is attached to the key body 50, there is a pin tumbler (any one of 63 to 65, 73 to 75) that is not displaced to the attachment allowable position. This prevents the mechanical key (in this case, another mechanical key) from being attached to the key body 50. Therefore, it is possible to easily specify whether or not the mechanical key attached to the key body 50 is compatible with the key body 50 by simply glanced at whether or not the mechanical key is attached to the key body 50. it can.

  (6) The mechanical key 80 is housed in the slider 70, and the slider 70 is slid relative to the case 60 from the slide start position to the slide end position, whereby the mounting of the mechanical key 80 on the key body 50 is completed. Here, when the mechanical key 80 is mounted on the key body 50 as described above, the slider 70 having a size that can accommodate the mechanical key 80 is operated, and thus the operation is easy. Therefore, the operability when the mechanical key 80 is attached to the key body 50 can be improved.

  (7) When the slider 70 is slid from the slide start position to the slide end position, a sense of moderation is given. Thereby, it is notified that the mounting of the mechanical key 80 on the key body 50 is completed. Therefore, the mechanical key 80 can be securely attached to the key body 50.

  (8) When the fitting protrusion 61 is fitted in the fitting recess 71 and the tip surfaces of the pin tumblers 63 to 65 are elastically contacted with the side surfaces of the slider 70, the slider 70 is in the slide end position. Held in. Therefore, the mounting state of the mechanical key 80 with respect to the key body 50 can be suitably maintained.

  (9) The mechanical key 80 is prevented from dropping after the mechanical key 80 is mounted. Therefore, the mounting state of the mechanical key 80 with respect to the key body 50 can be suitably maintained.

  (10) Different functions are set in the portable device 2 when the regular mechanical key 80 is attached to the key body 50 and when the regular mechanical key 80 is not attached to the key body 50. For this reason, when the user uses the portable device 2 with the regular mechanical key 80 attached as in the case where the user himself / herself uses the vehicle, the mechanical key is used as in the case where the user uses the vehicle. The function that works effectively with respect to the automobile can be made different between the case where the portable device 2 from which 80 is removed is used and the automobile is used. Here, since the function is set so that the user himself / herself is superior to others, the other person cannot handle the car at the same level as the user himself / herself, which is convenient for the user himself / herself. Therefore, the security level can be improved.

  (11) When the regular mechanical key 80 is not attached to the key body 50, the function is restricted as compared to the case where the regular mechanical key 80 is attached to the key body 50. For this reason, if the portable device 2 from which the regular mechanical key 80 is removed is handed over in a situation where another person uses the automobile, the other person cannot handle the automobile at the same level as the user himself / herself, so convenient. Therefore, the security level can be improved.

  (12) When the switch 91 is closed, an ID code signal including a normal key wearing state code is transmitted from the portable device 2. On the other hand, when the switch 91 is open, an ID code signal including a normal key non-installation state code is transmitted from the key device. Here, when such an ID code signal is received by the security device 3, the security device 3 recognizes whether the regular mechanical key 80 is attached to the key body 50 or not. It becomes possible. Therefore, by transmitting the ID code signal indicating the state of the portable device 2 from the transmission antenna 25, the security device 3 that receives the ID code signal can execute appropriate control according to the state on the portable device 2 side.

In addition, the said embodiment can also be changed and actualized as follows.
As shown in FIG. 7, switch contacts 69c and 69d may be provided, and the pin tumbler 74 may function as a conducting member when the slider 70 is in the first position. In this case, the switch contacts 69 c and 69 d and the pin tumbler 74 constitute a contact type switch 92.

  As shown in FIG. 8, switch contacts 69e and 69f may be provided, and the pin tumbler 75 may function as a conducting member when the slider 70 is in the first position. In this case, the switch contacts 69e and 69f and the pin tumbler 75 constitute a contact switch 93.

The state identifying switch of the present invention may be configured by at least one of the switches 91 to 93.
When the state identification switch of the present invention is configured by at least two (two or three) of the switches 91 to 93, the state of each of these state identification switches is monitored by the microcomputer 23. Then, different functions may be set in the portable device 2 when all (two or three) state identification switches are in the closed state and when they are not.

  As shown in FIG. 9, a switch 91 may be provided in a power supply path that supplies power from the battery 26 to each unit (such as the microcomputer 23) of the portable device 2. In this case, the switch contact 69a is electrically connected to the positive electrode of the battery 26, and the switch contact 69b is electrically connected to the microcomputer 23 and the like.

  With this configuration, the pin tumbler 73 is interposed between the switch contacts 69a and 69b and the switch 91 is in a closed state, so that a closed loop is formed in the power supply path for supplying power from the battery 26 to each part of the portable device 2. Is done. As a result, power supply to each part of the portable device 2 is allowed, and the portable device 2 effectively functions as an electronic key. That is, the portable device 2 effectively functions as an electronic key on condition that the regular mechanical key 80 is attached to the key body 50. Therefore, it is simple because whether or not the portable device 2 functions effectively as an electronic key is naturally determined for each state of the switch 91. The battery 26 corresponds to a power source that supplies power to each unit of the portable device 2.

  Incidentally, if the mechanical key 80 is removed from the portable device 2, so-called dark current does not flow to the microcomputer 23 or the like. Therefore, there is a merit that the battery 26 can be made long-lasting.

  A configuration in which at least one of the switches 91 to 93 is provided in the power feeding path may be adopted. In addition, when employ | adopting the structure by which at least 2 of the switches 91-93 are provided in the said electric power feeding path, those switches are connected in series. When all the switches are in the closed state, a closed loop is formed in the power supply path, and when that happens, power is supplied from the battery 26 to each part of the portable device 2.

A switch contact may be provided on the slider 70 so that at least one of the pin tumblers 63 to 65 functions as a conducting member.
・ Instead of or in addition to the configuration in which the depth pattern of the engagement holes 83 to 85 is individually set for each mechanical key, the pattern of the size of the diameter of the engagement holes 83 to 85 is individually set for each mechanical key. You may employ | adopt the structure to do. In this case, the diameter (thickness) of the pin tumblers 73 to 75 engaged with the engagement holes 83 to 85 may be set to be equal to the diameter of the engagement holes 83 to 85.

  Then, when the regular mechanical key 80 is attached, the diameters of the engagement holes 83 to 85 coincide with the diameters of the pin tumblers 73 to 75, so that the pin tumblers 63 to 65 and the pin tumblers 73 to 75 are matched. Is coincident with the boundary surface between the case 60 and the slider 70. As a result, the mechanical key 80 is allowed to be attached to the key body 50. On the other hand, when another mechanical key is mounted, the diameter of the engagement hole and the diameter of the pin tumblers 73 to 75 do not coincide with each other, so that the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 is the case. As a result, the mechanical key is prevented from being attached to the key body 50.

  In addition, while adopting a configuration in which the pattern of the depth of the engagement holes 83 to 85 is individually set for each mechanical key, the pattern of the diameter of the engagement holes 83 to 85 is individually set for each mechanical key. May be. In this case, many patterns are produced even if the number of engagement holes and pin tumblers is small. For example, even if the pin tumbler has a thickness corresponding to the diameter of the engagement hole, the boundary surface between the pin tumblers 63 to 65 and the pin tumblers 73 to 75 is the case where the pin tumbler is engaged with the engagement hole. 60 does not necessarily coincide with the boundary surface between the slider 70 and the slider 70. In other words, the mechanical key that is prevented from being attached by this is a different mechanical key from the regular mechanical key 80. Therefore, in order to improve the security level, it is sufficient to reduce the number of parts of such index means (collation mechanism), which can contribute to reducing the size and weight of the portable device 2.

  The formation mode of the engagement holes 83 to 85 with respect to the key plate 81 may be any as long as it is individually set for each mechanical key. For example, the number of engagement holes provided in the key plate 81 may be either one or a plurality.

  If a single engagement hole is provided, at least one of the depth and the diameter may be individually set for each mechanical key as described above, or alternatively or in addition. You may set the position which provides a hole separately for every mechanical key.

  If a plurality of engagement holes are provided, the number of holes may be set individually for each mechanical key. Alternatively, if the same number of engagement holes are provided, at least one of the depth and the diameter may be individually set for each mechanical key as described above, or alternatively or in addition. You may set the position which provides a hole separately for every mechanical key.

  In short, when the regular mechanical key 80 is mounted, the mounting is allowed, and when another mechanical key is mounted, the engagement hole and the pin tumbler cooperate to prevent the mounting. All the configurations are included in the present invention.

  -A plate tumbler or a ball may be used as the engaging member instead of the pin tumbler. Of course, you may use combining multiple types of engaging members, such as a pin tumbler, a plate tumbler, and a ball | bowl.

  Either a configuration in which the mechanical key 80 is accommodated in the slider 70 in a vertically placed state, a configuration in which the mechanical key 80 is accommodated in the slider 70 in a horizontally placed state, or a configuration in which the mechanical key 80 is accommodated in the slider 70 in an obliquely placed state are employed. May be. However, it is needless to say that the pin tumblers 73 to 75 need to be engaged with the engagement holes 83 to 85 by making the formation positions of the engagement holes 83 to 85 different for each placement method. .

  -Key piles exist in the mechanical key so as to fit the door cylinder for opening and closing the door, the key cylinder for starting the engine, and the cylinder of the glove box. Moreover, this key pile is set individually for each mechanical key. Therefore, a configuration in which the pin tumblers 73 to 75 are engaged with the grooves existing between the key ridges may be adopted. That is, the existing groove between the key ridges may be used as the engaged portion. Then, it is not necessary to provide an engagement hole for the existing mechanical key.

  Instead of the slide-type portable device 2 in which the slider 70 is slid with respect to the case 60, the rotary-type key device in which the rotor is rotated with respect to the case 60 may be embodied. In this case, the key plate 81 of the mechanical key 80 is accommodated in the rotor, and when the regular mechanical key 80 is attached, the rotor is allowed to rotate, and when another mechanical key is attached, the rotor is rotated. Can be prevented.

  In the embodiment, the case 60 is provided with the fitting protrusion 61 and the slider 70 is provided with the fitting recess 71. However, the slider 70 is provided with the fitting protrusion and the case 60 is provided with the fitting recess. Also good.

  Or the structure by which a some fitting protrusion and a some fitting recessed part are provided may be sufficient. In this case, all the fitting protrusions are provided on one of the case 60 and the slider 70 (for example, the case 60), and all the fitting recesses are provided on the other of the case 60 and the slider 70 (in this case, the slider 70). It is not limited to. For example, in a configuration in which two fitting protrusions and two fitting recesses are provided, one fitting protrusion is provided in the case 60, and a fitting recess in which the fitting protrusion is fitted is provided in the slider 70. A configuration in which another fitting protrusion is provided on the slider 70 and a fitting recess in which the slider 70 is fitted may be provided on the slider 70.

  The fitting protrusion 61 and the fitting recess 71 that function as holding means are not always necessary, and can be omitted. This is because the slider 70 existing at the slide end position can be held at the slide end position by the holding means constituted by the pin tumblers 63 to 65 and the springs 66 to 68. However, in the configuration in which two types of holding means are provided as in the above-described embodiment, it is preferable that the mounting state of the mechanical key 80 with respect to the key body 50 is reliably performed.

  In the above-described embodiment, when the portable device 2 to which the regular mechanical key 80 is not attached is used, restrictions are imposed on the case where the portable device 2 to which the regular mechanical key 80 is attached is used. However, this restriction is not limited to the restriction on the travelable period. That is, in the former case, restrictions may be imposed on the travelable distance compared to the latter case. For example, in the latter case, the travelable distance is not restricted, and in the former case, the travelable distance may be 1 km.

  Or in the former case, you may make it give a restriction | limiting about the engine startable frequency | count with respect to the latter case. For example, in the latter case, the engine startable number of times is not restricted, and in the former case, the engine startable number of times may be limited to one time.

  Or in the former case, you may make it give restrictions about the maximum speed with respect to the latter case. For example, in the latter case, the maximum speed is not restricted, and in the former case, the maximum speed may be 10 km / h.

  Alternatively, in the former case, a restriction may be imposed on a plurality of things (for example, at least two of a travelable period, a travelable distance, a possible number of engine starts, and a maximum speed) with respect to the latter case.

Although it is an extremely rare example, the former case may be superior to the latter case.
In a key device used for automobile use like the portable device 2, several operation switches are provided in order to improve convenience. For example, an unlock switch, a lock switch, a trunk open switch, a panic switch, and the like.

  Incidentally, the unlock switch is operated when it is desired to unlock the vehicle-mounted door by remote control from a point away from the automobile (for example, a point at a distance of about 5 m at the longest from the automobile). On the other hand, the lock switch is operated when it is desired to lock the vehicle-mounted door by remote control from a point away from the automobile. On the other hand, the trunk opening switch is operated when it is desired to open the vehicle-mounted trunk by remote control from a point away from the automobile. Finally, the panic switch is operated when it is desired to ring the in-vehicle horn by remote control from a point away from the automobile. In other words, the panic switch is operated when it is desired to issue a warning to a third party, such as when a vehicle is being used by a third party.

  When the regular mechanical key 80 is attached, the operation of these operation switches is validated. When the regular mechanical key 80 is not attached, the operation of these operation switches is invalidated. May be.

  In the case where the regular mechanical key 80 is attached, when the operation switch is operated according to a predetermined order, an ID code signal including the regular key attachment state code is transmitted from the portable device 2. Also good. In addition, when the regular mechanical key 80 is attached, when the operation switch is operated according to another predetermined order (for example, the reverse order of the previous order), the ID code including the regular key non-attached state code A signal may be transmitted from the portable device 2.

  Here, when the portable device 2 to which the regular mechanical key 80 is attached is used by another person against the intention of the user, the user himself operates the operation switches in the latter order prior to that. Then, other people who do not know that the use of the car will be restricted only after operating the operation switches in the former order will be able to use the car only in a restricted manner, which is convenient for the user himself / herself. Good. In other words, only the user himself / herself can operate the car at will, thereby improving the security level.

The block diagram which shows the structure of the motor vehicle of this embodiment to which the electronic key system is applied. Explanatory drawing which shows the predetermined area | region outside a vehicle. Explanatory drawing which shows the predetermined area | region in a vehicle. Sectional drawing of the portable machine which shows the state by which mounting | wearing of the mechanical key with respect to a key main body is completed. Sectional drawing of the portable machine which shows the state in the middle in case a mechanical key is mounted | worn with respect to a key main body. Sectional drawing of the portable machine which shows the state from which the mechanical key is removed from the key main body. Sectional drawing of the portable machine which shows the state in which mounting | wearing of the mechanical key with respect to the key main body in other embodiment is completed. Sectional drawing of the portable machine which shows the state in which mounting | wearing of the mechanical key with respect to the key main body in other embodiment is completed. The electric circuit diagram which shows that the switch is provided in the electric power feeding path which supplies electric power to each part of a portable machine in another embodiment.

Explanation of symbols

  2 ... portable device (key device), 23 ... microcomputer (monitoring means, control means), 26 ... battery (power supply), 50 ... key body, 63-65 ... pin tumbler (engaging member), 69a, 69b ... switch contacts, 73 to 75: Pin tumbler (engagement member), 80: Mechanical key, 91: Switch (state identification switch).

Claims (3)

In a key device in which a mechanical key is attached to the key body,
When a mechanical key that conforms to the key body is mounted on the key body, the mechanical key that is not compatible with the key body is mounted on the key body, and the mechanical key that does not conform to the key body is mounted. When the engagement member is displaced to a mounting prevention position that prevents the mechanical key from being mounted on the key body,
When the mechanical key that fits the key body is not attached to the key body, the switch is opened, and when the mechanical key that fits the key body is attached to the key body, the engaging member is displaced to the allowable mounting position. And a switch for state identification in which the engagement member is interposed between the switch contacts and the switch is closed.
A key device, wherein different functions are set in the key device when the state identification switch is in the open state and when the state identification switch is in the closed state. The key device according to claim 1,
Monitoring means for monitoring whether the state identification switch is in an open state or whether the state identification switch is in a closed state;
Control for setting different functions for the key device when the state identification switch is in the open state and when the state identification switch is in the closed state based on the monitoring result by the monitoring means And a key device. The key device according to claim 1 or 2,
It has a power supply to supply power to each part of the key device,
A key is characterized in that a closed loop is formed in a power supply path for supplying power from the power source to each part of the key device when an engaging member is interposed between the switch contacts and the state identifying switch is closed. apparatus.

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