JP3524194B2 - Lock cylinder and electronic key - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock cylinder connected to a locking / unlocking mechanism of a lock body and an electronic key inserted therein (hereinafter, both are referred to as "electronic lock").

[0002]

2. Description of the Related Art In recent years, electronic locks for electrically locking and unlocking are becoming widespread and are being used in systems such as building security and home security. Such electronic locks are
The lock cylinder includes an electric drive mechanism, and an electronic key (hereinafter referred to as "key") inserted into the cylinder. The cylinder is connected to a locking / unlocking mechanism of a lock body arranged on a door door, for example.

For example, Japanese Patent Publication No. 6-13800 discloses an example of a lock cylinder (cylinder lock). In this conventional example, the cylinder is composed of an outer cylinder fixedly arranged and an inner cylinder connected to the locking / unlocking mechanism, and the inner cylinder is held in the outer cylinder. Here, in a normal state, the outer cylinder and the inner cylinder are connected by the engagement pin (connecting pin), and the rotational movement of the inner cylinder is prohibited. On the other hand, when a proper key is inserted, the engagement pin is driven by the actuator after the electrical key identification and verification, whereby the engagement pin is removed from the inner cylinder and the inner cylinder is made rotatable. It can be locked and unlocked. Since such an engagement pin is a key to determine whether or not it can be rotated and greatly affects the performance of the electronic lock, a more reliable operation is desired.

On the other hand, some conventional electronic locks receive power for driving an actuator in a cylinder from a small battery in a key, and a long-life battery (for example, a battery in a cylinder). For example, there is one in which electric power is supplied to the actuator from a lithium battery). According to the former electronic lock, there is no need to arrange a battery or the like in the cylinder and there is no need to route the signal line, which is advantageous for construction and maintenance, but there is a limit to the size of the battery built in the key. is there. The latter electronic lock has the same problem, and moreover, there is a strong demand for power saving in general electronic locks.

As described above, the electronic lock has been conventionally required to have certainty in operation and to be saved in power.

By the way, in the conventional electronic key, the identification code is transmitted to the cylinder side by using the battery in the key body as a power source. Then, in order not to waste power consumption, the transmission or the like is performed only when the key is inserted into the cylinder. Specifically, a magnet such as a permanent magnet is arranged near the key hole of the cylinder, while
A reed switch as a magnetic force sensor is arranged on the key. Then, when the key is inserted into the cylinder, the magnetic flux of the magnet is detected by the reed switch on the key side to detect the insertion state, and thereby transmission / reception is executed.
Here, in order to protect the reed switch, the reed switch is buried at a position slightly separated from the side surface of the key body.

Incidentally, in a conventional security system equipped with an electronic lock, a lock cylinder or a lock main body arranged on a door door or the like and a central management unit are connected by a signal line, for example, an electronic lock can be operated. The setting of the period and the recording and management of the electronic lock usage information were carried out in the central control room.

[0008]

As described above, regarding the cylinder of the electronic lock, there is a demand for further improving the operational certainty of the engagement pin for improving reliability and reducing the power consumption of the battery as much as possible. There is a request for power saving that is desired.

Generally, in order to ensure the operation of the engagement pin, it is necessary to increase the output of the actuator. However, if this is done, the power consumption of the actuator will increase and there is a demand for power saving. Against. On the other hand, if the power consumption of the actuator is reduced, the operation of the engagement pin becomes uncertain, and the reliability of the electronic lock may be reduced. Therefore, there is a demand for the realization of a cylinder that simultaneously satisfies two seemingly contradictory requirements.

It should be noted that it is contrary to the request for power saving to utilize the driving force of the actuator again when the engagement pin operated by the driving force of the actuator is returned. Therefore, there is a demand for a cylinder that does not require electric power to restore the engagement pin.

As described above, in the configuration in which the key insertion is detected by detecting the magnetic field lines, the reed switch is buried at a position recessed from the side surface of the key body by a certain distance in order to protect the reed switch from physical impact. ,
The reed switch could not be placed close to the magnet. Due to such separation, the reed switch receives a magnetic flux that has diverged to some extent.
Reed switch is ON before the expected insertion state
However, there is a problem that the operating point of the reed switch varies. In addition, the operational ampere-turns of the reed switch vary to some extent from product to product, which causes a problem that the operating point of the reed switch also varies.

The variation of the operating point causes variation of the transmission / reception timing, that is, the operation timing of the actuator. If the energization time of the actuator is lengthened correspondingly, the problem of useless power consumption occurs.

As described above, in the conventional system including the electronic lock, the electronic lock and the central control room are connected by the signal line to manage the operation of the electronic lock. In this case, if the key itself can be given time management ability and the effective period of key usage can be set, there is no need for wiring from the cylinder side to the central control room, which is economically advantageous and various security aspects can be achieved. Can respond to social needs. That is, depending on individual circumstances such as the key holder and the place where the electronic lock is installed, the key can be activated only on a specific day of the week or only on a specific time zone of the day.
If the usage history can be recorded in the electronic key, information useful for security can be retrieved, and individual electronic key management can be realized.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to reduce the power consumption while maintaining and improving the reliability of the operation of the connecting pin with respect to the lock cylinder. .

Another object of the present invention is to realize a lock cylinder that does not require an electric driving force when the connecting pin is returned.

Further, according to the present invention, the magnetic field generated by the magnet is spatially steeply changed to detect the magnetic force, and the switch always operates at the same key insertion position without being affected by the variation in the operational ampere-turn of the switch. The purpose is to provide an electronic key to

[0017]

[0018]

To achieve the above object, the first invention of the present application is directed to a first rotating body into which an electronic key is inserted and a second rotating body which engages with a locking / unlocking mechanism. A body, a connecting pin that is held by the first rotating body, moves forward, and has a tip end engaged with the second rotating body, and that rotationally connects the first and second rotating bodies; On the other hand, a return spring that applies an urging force in the backward direction, a feed spring that has a weaker urging force than the return spring and that applies an urging force in the forward direction to the connecting pin, and the pressing force when the key is inserted. The key interlocking mechanism that temporarily removes the biasing action of the return spring on the connecting pin and releases the accumulated biasing force of the return spring when the key is pulled out, and the feed spring in the state where the biasing action is removed. Regulating part for regulating the forward movement of the connecting pin by If, when the is adapted determined per the electronic key obtained, the regulating member is driven to the restriction release, and having a driving unit that allows the engagement entry of the coupling pin.

Further, in the above structure, in order to change the posture of the restricting member from the upright state to the inclined state, the restricting member has a bearing portion to which the rotary shaft of the drive unit is fixed, and in the upright state, the bearing part. A hook-shaped portion that hooks on the protrusion formed on the connecting pin to restrict the forward movement, and allows the protrusion to move forward when in the inclined state, and the backward sliding of the protrusion in the inclined state is used. And a restoration slope portion for raising the regulating member itself to an upright state.

Further, in the above structure, the return spring includes a main spring in which an elastic force is accumulated by the pushing action of the electronic key, and the key interlocking mechanism pushes the electronic key while the main spring is connected. A push rod for transmitting the movement, an arm for pushing the connecting pin in the backward direction, and a movement conversion unit for converting the movement of the push rod into the movement of the arm. The urging force of the spring is transmitted to the connecting pin via the arm, and when the key is inserted, the arm is flipped up to remove the urging action of the return spring.

Further, in the above construction, as the return spring, an auxiliary spring engaging with the arm is provided in addition to the main spring.

A second aspect of the present invention is an electronic key inserted into a lock cylinder, the electronic key facing the magnet arranged in the lock cylinder when the key is inserted into the lock cylinder. is incorporated in the key body, a magnetic sensor for a key insertion detection, the
Inside the key body, the magnet side of the magnetic force sensor
A magnetism- conducting member that is disposed close to the
When the force sensor detects the key insertion, the power is not turned on.
Key side electronic circuit that communicates with the electronic circuit on the lock cylinder side
And a road .

[0023]

[0024]

[0025]

[0026]

[Action]

(1) According to the above-mentioned first invention, the first rotating body and the second rotating body
The connecting pin (engagement pin) for connecting to the rotating body is provided with a backward biasing force by the return spring and a forward biasing force by the feed spring as its reaction. Since the return spring is a stronger spring than the feed spring, in the normal state (non-operating state of the electronic lock),
A force is always applied to the connecting pin in the backward direction, so that the connecting pin does not move forward and is stable at the backward end.

When the electronic key is inserted into the first rotating body, the action of the key interlocking mechanism transmits the pushing force at the time of inserting the electronic key, so that the urging action of the return spring on the connecting pin is temporarily removed. To be done. In this case, the pushing force (pushing energy) at that time is accumulated in the return spring itself in the form of compression (or expansion) of the return spring, that is, accumulation of elastic energy. The feed spring and the return spring exert a force on the connecting pin in opposite directions in the forward and backward directions, but when the biasing force of the return spring disappears, the biasing force of the feed spring develops and the connecting pin moves forward. Try to start. However, the advance of the connecting pin is once restricted by the restricting member.

At the same time as the above process, the electronic key is the first key.
When it is inserted into the rotating body, the electronic circuit in the lock cylinder identifies the electronic key, and if the electronic key is determined to be valid as a result of the collation, the electronic key is driven to the drive unit. The signal is output. As a result, the drive unit drives the regulating member to change its posture, and cancels the forward regulation of the connecting pin by the regulating member.

When the restriction by the restriction member is released, the connecting pin advances as it is due to the urging force of the feed spring,
The first rotating body and the second rotating body rotate integrally with each other.
That is, when the electronic key inserted in the second rotating body is rotated, the two rotating bodies rotate integrally, and as a result, the locking / unlocking mechanism that engages with the second rotating body can be operated. is there.

Thereafter, when the electronic key is pulled out from the first rotating body, the urging force of the return spring is given to the connecting pin by the action of the key interlocking mechanism, that is, the original urging force of the return spring is generated. The accumulated biasing force is released and the connecting pin is moved back. of course,
Since the return spring has a larger biasing force than the feed spring, the connecting pin can be reliably retracted even if the feed spring is still acting on the connecting pin. When returning the connecting pin,
In that sense, power saving can be achieved without requiring an electric driving force. When the connecting pin retracts, the connection between the first rotating body and the second rotating body is released and the initial state is restored.

In a preferred aspect of the present invention, the restricting member has a bearing portion, a hook-shaped portion, and a restoring slope portion, and functions like a so-called "trigger" of a gun. The key interlocking mechanism returns to the connecting pin using the insertion of the electronic key, starting from the state where the biasing force is applied to the connecting pin from both the return spring and the feed spring (the first restrained state). When the urging action of the spring is removed (release of the first restrained state), the projection formed on the connecting pin is caught by the hook-shaped portion, and a stable state (second restrained state) is formed. Then, after the above identification and verification, when the drive unit rotates the drive shaft, the regulation member having the bearing fixed to the rotation shaft rotates, and the posture of the restriction member changes from the upright state to the inclined state. Then, the protruding portion comes off from the hook-shaped portion (release of the second restrained state), and engagement with the second rotating body is realized. In addition,
The frictional resistance between the hook and the protrusion should be as small as possible, so that the hook has a smooth surface so that the coefficient of friction is small, while the protrusion has, for example, a structure having rollers. It is desirable to do.

On the other hand, when the electronic key is pulled out and the connecting pin begins to retract, the protrusion of the connecting key slides into the restoration slope portion to raise the regulating member. That is, in the inclined state,
The retreat path of the protrusion and the contact side (contact surface) of the restoration slope intersect, and when the protrusion retracts, the protrusion hits the restoration slope, and the geometrical point of its action point and rotation center. From this relationship, the restriction member is rotated in a direction opposite to the above rotation, and the restriction member itself stands upright as the protrusion slides. As a result, the same stable state as that at the beginning is established, and preparation for forming the second restrained state is completed in the restricting member.

According to the above construction, the forward movement of the connecting pin can be mechanically and reliably controlled according to the result of the electrical verification, and the inclined regulating member is erected by utilizing the backward movement of the connecting pin. Can be returned to. In particular, since the regulating member is formed in the shape of a trigger, it is possible to control a stronger force than that with a relatively weak force. Further, the holding force is also excellent, and in the present invention, the connecting pin does not come off from the regulation member unless the regulation member is rotationally driven. Therefore, according to the present invention, there is an advantage that power saving can be achieved under a reliable operation and that the actuator can be downsized.

In a preferred aspect of the present invention, the movement of the push rod to which the pushing movement of the electronic key is transmitted is connected to the arm via the movement converting portion. The arm acts on the connecting pin, while the push rod is connected to the main spring as a return spring, so that the urging force of the main spring causes the push rod, the motion converting portion and the arm to move. It is transmitted to the connecting pin via. That is, when the key is not inserted, the return urging force of the main spring is transmitted to the connecting pin by the key interlocking mechanism (first blocking state). Then, when the key is inserted, the key itself moves the push rod, thereby compressing (or extending) the main spring, and as a result, the biasing action of the arm on the connecting pin is temporarily removed. That is, the arm is bounced off, the transmission of the urging force of the main spring is blocked, and the first restrained state is released. Then, the above-mentioned second restraint state is formed, and when it is released, the engagement of the connecting pin is achieved.

On the other hand, when the key is pulled out from the first rotating body, the main spring that has been compressed (or expanded) until now is released, and the urging force moves the push rod in the opposite direction, whereby the arm is connected. While contacting the pin,
A strong backward biasing force is applied to the connecting pin via the arm. This realizes the return of the connecting pin.

As described above, the removal of the return urging action in the connecting pin can be realized by using the key pressing input, and at the same time, the key pressing input can be accumulated in the main spring and used as the backward urging force later. . If the main spring is insufficient as the return spring, the auxiliary spring can be added as the same return spring.

(2) In the second aspect of the invention, since the magnetic conducting member is arranged in the vicinity of the magnetic force sensor functioning as a power switch or the like in the electronic key body, the magnetic flux of the magnet is focused by the magnetic conducting member. To do. As a result, the operating point (operating position) for key insertion detection can be stabilized, and the operating accuracy can be improved. That is, the magnetic conducting member functions as a magnetic lens, so to speak, and has directivity. In a preferred aspect of the second invention, the magnetic conducting member is arranged in front of the magnetic force sensor, that is, on the magnet side. As a result, a part or all of the buffer region, which originally exists to protect the magnetic force sensor from a physical shock, can be utilized as an embedded space for the magnetic lens.

[0038] (3) the key body, a period determination circuit for determining the lifetime use a clock circuit for outputting time information, may be provided <br/>, date, day, the time of day or the like, The validity period of the electronic key can be set, and the electronic key can be used only within the validity period. Therefore, the electronic key itself can have a self-management function instead of or in parallel with the management in the central management room.

[0039] (4) the key body, the creation of the use history information (communication information), a storage unit for recording it may Ke a set <br/>, use of the electronic key date Etc. can be recorded as a usage history. Of course, the stored information can be transmitted to the outside by, for example, transmitting and receiving a specific code.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a preferred embodiment of the electronic lock according to the present invention, and FIG. 1 is a sectional view thereof. In FIG. 1, the electronic lock 10 is roughly divided into a lock cylinder 12 and an electronic key 14. First, the electronic key 14
Will be described.

In the main body 14A of the electronic key 14, an electronic circuit 16 described later, a battery 18 as a power source of the electronic circuit 16, a reed switch 20 functioning as an operation switch of the electronic circuit 16, and a diagram shown in FIG. And a transmitting / receiving antenna which is not provided.

A convex portion 14C is formed on the side of the insertion portion 14B of the main body 14A. This convex portion 14C is the key 14
Is inserted into the cylinder 12, and the key 14 is prevented from being pushed back by the spring action inside the cylinder 12 when the key 14 is rotated. This will be described later with reference to FIG.

The reed switch 20 functions as a magnetic sensor in this embodiment, and is a permanent magnet 13 described later.
Turns on the electronic circuit 16 when the magnetic force from the
To do. As shown in FIG. 1, the reed switch 20 is
It is embedded at a position recessed from the side of the insertion portion 14B by a certain distance. This is to protect the reed switch 20 from a physical shock. However, if it is buried in such a recessed position, the distance between the reed switch 20 and the permanent magnet 13 increases, and as a result, the reed switch 20 detects the diverged magnetic flux. Therefore, as described above, the ON timing of the reed switch 20 varies and the reed switch 20 is turned ON at an unexpected insertion position, so that the operation timing of the actuator described later cannot be made appropriate.

Therefore, in this embodiment, the magnetic conducting member 22 is embedded on the permanent magnet 13 side of the reed switch 20.
The magnetic conducting member 22 is made of a yoke made of a soft magnetic material or the like. In this embodiment, two magnetic conducting members 22 are embedded in parallel. The magnetic conducting member 22 functions as a so-called magnetic lens, and as a result of converging the magnetic flux, it is possible to enhance the sensitivity of the reed switch 20 and stabilize the position where the reed switch 20 operates. . That is, the reed switch 20 is provided with magnetic directivity to ensure the operation of the reed switch 20 at an appropriate position of the electronic key 14. Of course,
In this embodiment, two magnetic conducting members 22 are embedded, but the number may be one, or three or more. It is also suitable to dispose a member that functions as a magnetic lens on the cylinder 12 side.

FIG. 1 shows the key 14 not fully inserted into the cylinder 12 as shown. On the other hand, FIG. 2 shows a state in which the key 14 is completely inserted into the cylinder 12. As shown in FIG. 2, in the completely inserted state, the reed switch 20 exists vertically above the magnet 13, and the magnetic conducting member 22 exists between the two, so that the magnetic flux is converged. Further, in the fully inserted state shown in FIG. 2, it is understood that the convex portion 14C is completely inserted into the cylinder 12.

Next, the cylinder 12 will be described in detail. In FIG. 1, a cylinder case 24 as an outer cylinder includes a cylindrical housing 26 and a housing cover 28 that closes the key insertion side of the housing 26. Figure 4
As shown in, a key hole 28A is formed on the side of the housing cover 28 where the key is inserted. Further, one groove 28B communicating with the key hole 28A is formed in the key hole 28A. This groove 28B is for allowing the above-mentioned protrusion 14C to enter, and as shown in FIG. 4, when the inserted key 14 is rotated, the protrusion 1
4C hits the rear surface of the housing cover 28 and prevents the key 14 from being pushed back. Although one groove 28B is formed in this embodiment, it may be formed according to the number of the convex portions 14C.

In FIG. 1, in a cylinder case 24, two cylindrical rotating bodies as inner cylinders, that is, a first rotating body 30 and a second rotating body 32 are rotatably held. The permanent magnet 13 described above is arranged in the vicinity of the key insertion opening inside the first rotating body 30, and the electronic circuit 33 is arranged. This electronic circuit 33
Is a circuit that communicates with the electronic circuit 16 on the side of the key 14 and outputs a drive signal to an actuator 38 described later when the inserted key 14 is proper.
In the present embodiment, a loop antenna is embedded in the insertion portion 14B of the key 14, while a loop antenna (not shown) that electromagnetically couples with the loop antenna is also provided in the first rotating body 30. It is arranged. Of course, communication may be established between two electronic circuits by utilizing electrical contacts instead of electromagnetic coupling.

Inside the first rotating body 30, a spring 34 which is compressed by the tip portion 14D of the key 14 is arranged in front of the tip portion 14D. The push rod 36 is a member that is laterally crossed between the first rotating body 30 and the second rotating body 32 so as to be able to move forward and backward, and the spring 34 is connected to one end thereof. That is, the push rod 36 is pushed toward the second rotating body 32 side, that is, leftward in FIG. 1 by pushing in the tip portion 14D, and at the same time, the spring 34 is compressed. In this embodiment, the spring 34
1 functions as a return spring described later, and as shown in FIG. 1, the spring 34 may not be used as a compression type but may be used as an extension type. This also applies to other springs described later.

The actuator 38 includes the first rotating body 30.
Is fixed against. This actuator 38
A rotor and a rotor (partially omitted) are provided between the two plates 40 and 42, and the rotor is fixed to a rotary shaft 38A supported by bearings. That is, the actuator 38 functions as a rotary actuator that rotates the rotary shaft 38A by a predetermined angle.

On the other hand, the second rotary body 32 is rotatable with respect to the first rotary body 30 in a normal state, and the two rotary bodies are separated by the engagement of the connecting pin 44 described below. Rotate integrally.

FIG. 3 shows a cross section taken along the line III-III 'shown in FIG. As shown in FIG. 3, the plate 4
A connecting pin 44 is held on the upper part 2 by a trigger 46 and two guide members 48 so as to be able to move back and forth in the vertical direction in the drawing. The second rotating body 32 is formed with an insertion hole 32B into which the tip of the connecting pin 44 is inserted. The engagement hole 32B penetrates the second rotary body 32 in FIG. 3, but may be of a hollow shape, of course.

The connecting pin 44 is formed with an elongated hole 44A that widens in the advancing and retracting direction, and the rotary shaft 38A of the actuator 38 penetrates through the elongated hole 44A. The trigger 46 is attached to the rotary shaft 38A by the shaft fixing member 50.
Is fixed by. That is, the rotary shaft 38A and the trigger 46 rotate integrally.

The trigger 46 regulates and controls the forward movement of the stud 52, which is a protrusion that is fixedly formed on the connecting pin 44, and as shown in FIG. If it does, it will have a spanner shape. Figure 5
An enlarged view of the trigger 46 is shown in FIG. As shown in FIG. 5, the trigger 46 includes a bearing portion 46A that penetrates the rotary shaft 38A, a hook-shaped portion 46B that restricts the forward movement of the stud 52, and a trigger 46 that is inclined when the stud 52 retracts. And a base portion 46C into which the stud 52 is dropped when the key 14 is not inserted.
The specific action of the trigger 46 will be described later.

Returning to FIG. 3, the protrusion 3 is formed on the working end (tip) of the push rod 36 which is moved by the tip 14D of the key 14.
6A is formed, and the protrusion 36A is engaged with the motion converting body 54. An arm 56 for pushing down the stud 52 in the backward direction is fixed to the movement converting body 54, and the forward / backward movement of the push rod 36 is converted into a rotational movement of the arm 56 by the movement converting body 54. FIG. 6 shows a perspective view of the motion conversion body 54. The motion conversion body 54 is formed in a cylindrical shape, and a lead 54A as a spiral groove is formed on the side peripheral surface thereof. Then, the projection 36A 'of the push rod 36', which is schematically shown in FIG. 6, engages with the lead 54A, and when the push rod 36 'moves back and forth, the motion conversion body 54 rotates forward and backward correspondingly. As shown in FIG. 6, when the push rod 36 ′ is pushed in, the motion converting body 54 rotates counterclockwise, which causes the movement converting body 54 to rotate.
The arm 56 shown in FIG. 2 is removed from the stud 52 and pulled upward. On the other hand, as shown in FIG. 6, when the push rod 36 'is pulled back, the motion conversion body 54 rotates clockwise,
The arm 56 shown in No. 3 is pulled down to apply a backward biasing force to the stud 52.

As shown in FIG. 3, the motion converting body 54 is rotatably supported by a fixed shaft 54B, and one end of a spring 58 as a feed spring is fixed to the shaft 54B. . The other end of the spring 58 is engaged with the stud 52, that is, the spring 58 gives the stud 52 a biasing force in the forward direction. The action of the spring 58 is not affected by the rotation of the moving rotary body 54.

As can be seen from FIGS. 1 and 3, FIG.
The elastic action of the spring 34 shown in FIG. 3 is transmitted to the stud 52 by the key interlocking mechanism including the push rod 36, the motion converting body 54, and the arm 56, that is, in the non-inserted state of the key 14, the spring 34 moves. A biasing force is applied to the stud 52 as a force in the backward direction. In this embodiment, one end of the spring 60 supported by the fixed shaft 60A is engaged with the tip of the arm 56 in order to assist the biasing action of the spring 34 as such a return spring. That is, this spring 60
Also functions as a return spring, and exerts an urging force on the tip of the arm 56 in the backward direction of the stud 52. Of course, the spring 6 as the second return spring
Although 0 is not essential, the more reliable return of the connecting pin 44 can be realized by the presence of the spring 60.

In FIG. 1, the housing 26 is formed with an opening 26A through which the engaging portion 32A formed on the second rotating body 32 projects. Here, the engaging portion 3
2A engages with the locking / unlocking mechanism and transmits the rotation of the second rotating body to the mechanism.

The stud 52 is provided with a rotatable roller in order to reduce the contact resistance with each side of the trigger 46.

Next, the operation of the electronic lock of this embodiment will be described with reference to FIGS.

As shown in FIG. 3, when the key 14 is not inserted, the arm 56 moves the stud 52 in the backward direction by the action of the spring 34 (see FIG. 1) as the return spring and the spring 60 as described above. The stud 52 is pushed into the base portion 46C of the trigger 46 shown in FIG. That is, in the state shown in FIG. 3, the connecting pin 44 is at the retracted end, and the tip of the connecting pin 44 is out of the engagement hole 32B. In this embodiment, the total spring urging force of the spring 34 and the spring 60 is larger than the spring urging force of the spring 58, and as shown in FIG. 44 cannot move forward. That is, due to the unbalanced state (unbalanced state) of the return spring and the feed spring, the connecting pin 44 is forcibly restrained, that is, the first restrained state is established. In the first stopped state, the first rotating body 30 and the second rotating body 32 are not connected at all, and even if the first rotating body 30 is rotated, locking and unlocking is not performed. .

Next, when the key 14 is inserted into the cylinder 12, the reed switch 20 detects the magnetic force when the key 14 is completely inserted (see FIG. 2), and the electronic circuit 1
6 is operated. That is, the magnetic conducting member 22 is arranged on the permanent magnet 13 side of the reed switch 20, and the key 1
When reed switch 20 is O
N is done. When the reed switch 20 is turned on, the key 14
Communication via the electromagnetic coupling is established between the electronic circuit 16 on the side of the electronic circuit 33 and the electronic circuit 33 on the side of the cylinder 12.
Collates the identification code of the key 14 to determine whether the identification code is proper or not.

On the other hand, as shown in FIG. 2, when the key 14 is inserted into the cylinder 12, the tip portion 14D gives a pushing force to the push rod 36 and the spring 34, which causes the spring 34. Is compressed and the push rod 36 is pushed toward the second rotating body 32 side.

Then, as shown in FIG. 7, the forward movement of the push rod 36 is converted into the lifting movement of the arm 56 by the movement converting body 54, and the biasing force applied to the stud 52 by this is applied to the spring 58. The connecting pin 44 provided with the stud 52 starts to move forward because only the force is applied. However, as shown in FIG. 7, the hook-shaped portion 46B (see FIG. 5) of the trigger 46 serving as the regulating member is not attached to the stud 5.
The forward movement of 2 is restricted and blocked, whereby a second restrained state is formed.

That is, in order to connect the two rotating bodies after waiting for the electrical identification and verification of the inserted key, and to reduce the driving force necessary for the connection to save power. The stud 52 is stopped by the trigger 46. In this second restrained state, the stud 52
Is stable at the maximum position of the curved hook-shaped portion 46B of the trigger 46, in other words, at the position where the potential energy of the spring 58 is minimum. That is, as will be described later in detail, the curvature of the hook-shaped portion 46B is set so that only one such stable point is obtained.

In the second restrained state shown in FIG. 7, the stud 52 is triggered by the spring 58.
Since it is pressed against the hook-shaped portion 46B, it does not come off even if there is an external impact. Further, when an improper key is inserted, the second stopped state shown in FIG. 7 is reached, but even if the key is rotated in that state, only the first rotating body 30 rotates. Therefore, the rotation of the second rotating body 32 is not performed.

If the identification code of the inserted key 14 is checked to determine that the key is proper, the electronic circuit 33 outputs a drive signal to the actuator 38. As a result, the actuator 38 rotates the rotary shaft 38A by a predetermined angle.

Then, as shown in FIG. 8, the attitude of the trigger 46 changes from the upright state to the inclined state. That is, with the change in the posture, the stud 52 is pushed back slightly backward (downward in the drawing) according to the curved shape of the hook-shaped portion 46B, and then escapes from the opening portion of the trigger 46 and advances. That is, the tip of the connecting pin 44 enters the engagement hole 32B, and the first rotating body 30 and the second rotating body 3
A connection with 2 is achieved. In this state, key 14
When is rotated, the second rotating body 32 rotates integrally with the first rotating body 30, and locking and unlocking can be performed.

As shown in FIG. 4, when the key 14 is rotated, the convex portion 14C formed on the insertion portion 14B of the main body 14A comes into contact with the back side of the housing cover 28, so that the spring 34 and the spring 60. The key 14 does not pop out due to the action of. That is, the convex portion 14
C functions to keep the arm 56 raised.
In the connected state shown in FIG. 8, since the spring 58 as a feed spring exerts a forward biasing force on the stud 52, the connecting pin 44 causes the connecting pin 44 to engage.
It never leaves B.

After the key 14 is locked and unlocked, the key 14 is rotated back to the inserted posture, and when the key 14 is further pulled out, the springs 34 and 60 as the return springs which have been compressed until then. Is released and the stored energy is given as a retracting action on the connecting pin 44. That is, when the key 14 is pulled out from the cylinder 12, the push rod 36 is pulled back by the action of the spring 34, etc., whereby the motion conversion body 5
4 rotates in a different direction than before, and the arm 56 is pushed down, so that the springs 34 and 6 are pushed against the stud 52.
Give a bias of 0.

This state is shown in FIG. 9, and as described above, the biasing force of the spring 58 as the feed spring is smaller than the biasing force of the springs 34 and 60 as the return springs. Retreats. On this occasion,
The restoring slope portion 46D of the trigger 46 in the inclined state is located on the path of the stud 52, and the stud 52 slides while pushing the restoring slope portion 46D, so that the geometry of the stud 52 and the restoring slope portion 46D. The trigger 46 restores the tilted state to the upright state.

In FIG. 10, the stud 52 has the restored slope portion 4
The state in which the trigger 46 is returning by sliding 6D is shown. Finally, the stud 52 falls into the base portion 46C shown in FIG. 5, whereby the movement of the stud 52 is stopped and the trigger 46 is completely restored to the upright state. That is, it returns to the state shown in FIG.

As shown in FIG. 11, although there are very few cases, the forward direction of the connecting pin 44 and the engaging hole 3 are increased.
It is conceivable that the tip of the connecting pin 44 may hit the inside of the second rotating body 32 even if the position of 2B is displaced and the second restrained state is canceled. However, even in such a position shift state, when the key 14 is rotated, the connecting pin 44 is rotated by the rotation of the first rotating body 30, and the tip of the connecting pin 44 is inserted into the insertion hole 32B within at least one rotation.
It will enter.

Next, the curvature of the hook-shaped portion 46B of the trigger 46 will be described with reference to FIG. In order to establish the second restrained state shown in FIG. 7, in this embodiment, the center of curvature Q of the hook-shaped portion 46B is more than the center of rotation P of the trigger 46.
Is set on the front side, that is, on the hook-shaped portion 46B side.
That is, from the viewpoint of potential energy, the trigger 46
In the upright state, the potential energy of the stud 52 biased upward in FIG. 12 by the spring 58 can be minimized. However, if the center of curvature Q is too close to the hook-shaped portion 46B side, the energy for removing the stud 52 from the hook-shaped portion 46B increases. Therefore, it is necessary to determine the shape of the hook-shaped portion 46B from the viewpoint of maintaining a stable holding state of the stud 52 and the amount of work required to rotate the trigger 46.

In FIG. 12, rotation of the trigger 46 requires two jobs to disengage the stud 52 from the trigger. First is the spring 58
Is a work to push back the stud 52 backward by a length L1 against the force of, and it is defined by F · L1 when the force of the spring 58 is F. The other is the stud 52
Is to move the hook-shaped portion 46B against the friction of the hook-shaped portion 46B by a distance L2, and the friction coefficient is μ
Is defined as μ · F · L2. On the other hand, when the force required to drive the trigger 46 to rotate is Fx, the amount of work by this force is Fx.L2. Therefore, this amount of work is equal to the total of the above two works, and when Fx is obtained from the condition, the following first equation is obtained.

Fx = F (L1 / L2 + μ) (1) As can be seen from the above first equation, μ is reduced and L1
If / L2 is made smaller, Fx can be made smaller than F.

Therefore, in this embodiment, L1 / L2 is
The stud 52 is selected to have a small value such as 0.1 to 0.2, and a roller type having a rotating ring rotatably fitted on a shaft standing on the connecting pin 44 is used. That is, the friction between the stud 52 and the hook-shaped portion 46B is made sliding friction to reduce μ.

In FIG. 12, O is a stud 52.
Indicates the vertex having the lowest potential energy, and 200 indicates the circumference drawn with a radius between the vertex O and the rotation center P. And L1 has shown the distance between the end of the hook-shaped part 46B, and the point where the straight line which connects the end and the rotation center P intersects the circular arc 100. L2 indicates the distance from the apex O along the shape of the hook-shaped portion 46B to the end.

In the present embodiment, the biasing force of the spring 58 as the feed spring is set to, for example, 10 to 20 g weight. The total urging force of the spring 34 and the spring 60 as the return spring is, for example, 30 to 50 g.
It is set to heavy.

As described above, in this embodiment, the stable state (first stable state) shown in FIG. 3, the second restrained state (second stable state) shown in FIG. In any of the coupled states (third stable state) shown in FIG. 9, the state of the connecting pin 44 can be held and stabilized with an appropriate spring biasing force, so that it is strong against external impact and secures a reliable operation. it can. Further, in the second restrained state shown in FIG. 7, even if the spring biasing force acts on the connecting pin 44 by the spring 58, the trigger 46 described above is used.
By the structure of the stud 52 and the stud 52, the amount of work required for the rotation of the trigger 46 can be reduced, and the power consumption can be significantly reduced as compared with the conventional case. That is, even if a comparatively large force is applied to the connecting pin 44 having a large stroke like a trigger of a gun, the connecting pin 44 can be moved forward with a small stroke and a small force. further,
In this embodiment, since the return spring is used, in other words, the accumulated pushing force is used, the trigger 46 can be raised from the inclined state to the upright state without requiring any electric drive. In that sense, there is an advantage that power saving can be achieved.

Next, the configuration of the electronic circuit 16 of the key 14 will be described with reference to FIG.

The reed switch described above is interposed between the transmitter / receiver 64 and the battery 18, and the power of the battery 18 is supplied to the transmitter / receiver 64 when the reed switch 20 is turned on. On the other hand, a loop antenna 62 is connected to the transmission / reception unit 64, and communication can be established between the loop antenna 62 and the electronic circuit 33 on the cylinder 12 side. A control unit 66 is connected to the transmission / reception unit 64, and a clock circuit 68 and a usage history memory 70 are connected to the control unit 66. When the reed switch 20 is turned on, the control unit 66 gives a transmission command of the identification code peculiar to the key to the transmission / reception unit 64, and controls the entire transmission / reception. Further, in this embodiment, the control unit 66 has a determination unit 66A. A valid period is set in advance in the determination unit 66A, and the determination unit 66A is based on the time information output from the clock circuit 68.
A determines whether the key is valid or invalid. That is, such a determination unit 66A is provided so that the key can be used only on a predetermined day or time.

Further, the control section 66 is provided with a creating section 66B for creating usage history information. This creating unit 66
B is for storing the communication record in the usage history memory 70 as usage history information when the key is inserted into the cylinder 12 and the communication between the electronic circuit 16 of the key and the electronic circuit 33 on the cylinder 12 side is established. is there. In that case, the usage history information includes time information output from the clock circuit 68, that is, information about when the key is used.

When changing the setting of the effective period set in the judging section 66A, the key 14 is inserted into a key controller (not shown) provided separately, and the loop antenna 62 is inserted.
The effective period is set and changed via. Similarly to this,
With such a key controller, the usage history information stored in the usage history memory 70 is read and used as security management information.

Therefore, according to such a configuration, an electronic lock that meets various security needs can be configured. For example, an electronic key used in a weekly condominium,
The electronic key of this embodiment can be used as an electronic key to be given to a person of a job type who needs to enter and leave the room for work at a certain time of the day.

The controller 66 controls the reed switch 20.
After turning on, the reed switch 20 is turned off after a certain period of time. However, in this embodiment, the magnetic conducting member 22 is arranged in front of the reed switch 20,
The operating point of the reed switch 20 can be optimized, and therefore problems such as communication problems and timing deviations in driving the actuator 38 can be avoided. The operational ampere-turn of the reed switch varies to some extent for each product. If the magnetic conducting member 22 is not used, the operating point of the reed switch 20 varies due to the dispersion of the magnetic flux, and communication is established between the cylinder 12 and the key 14. Although the operation timing of the actuator 38 is deviated, a normal connecting operation cannot be ensured. However, according to the present embodiment, such a problem can be solved and a highly reliable electronic lock can be constructed. Further, if the operating point of the reed switch 20 is stable, the drive time of the actuator 38 can be shortened to the necessary minimum, and in that sense, there is an advantage that the power consumption can be reduced.

Next, FIG. 14 shows the configuration of the second embodiment. In the configuration shown in FIG. 1, the direction of the connecting pin 44 is orthogonal to the arrangement direction of the first rotating body 30 and the second rotating body 32, but in the configuration shown in FIG. The direction of the connecting pin 144 is parallel to the arrangement direction of the two rotating bodies. That is, the first rotating body 130 and the second rotating body 1 are provided in the housing 126.
32 and 32 are rotatably held, and when the key 14 is inserted, the pushing pressure compresses the spring 134, and at the same time, the push rod 13 connected to the spring 134.
6 is pushed to the second rotating body 132 side. This motion is transmitted to the stud provided on the connecting pin 144 by the same structure as that shown in FIG. 3, and the above-described operation is similarly executed. In such a configuration, the rotation shaft 138A of the actuator 138 is oriented in the direction orthogonal to the arrangement direction of the two rotating bodies, and in view of the actuator 138 having a substantially cylindrical shape, a space loss may occur. However, the movement of the push rod 136 and the movement of the connecting pin 144 can be made parallel to each other to realize smooth and reliable transmission of the biasing force. As shown in FIG. 14, when the connecting pin 144 is advanced, the tip portion of the engaging pin 13 is formed in the second rotating body 132.
2B, the two rotating bodies rotate as a unit in that state. This is similar to the above-mentioned embodiment.

In FIG. 14, the tip portion 14D has the spring 1
Although it is in direct contact with 34, it is also preferable that the tip portion 14D is in direct contact with the push rod 136.
Further, the spring 134 can be connected to the working end side (the left end side in FIG. 14) of the push rod 136. Figure 1
It is also preferable that the member 144 shown in FIG. 4 is used as a mere feeding member, a connecting pin that moves in parallel with the member 144 is separately provided, and the connecting pin is arranged toward the edge of the second rotating body 132. is there.

[0089]

As described above, according to the first aspect of the present invention, it is possible to reduce the power consumption while maintaining and improving the reliability of the operation of the connecting pin. Further, the connecting pin can be returned without requiring an electric driving force.

According to the second invention of the present application, since the switch for detecting the magnetic force always operates at the same key insertion position, it is possible to avoid power loss due to supplying a drive signal to the actuator unnecessarily for a long time. Thus, power saving can be achieved and stable and reliable operation can be secured.

[0091]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of an electronic lock according to the present invention.

FIG. 2 is a partial cross-sectional view showing a state where the key is completely inserted.

FIG. 3 is a cross-sectional view showing a III-III ′ cross section shown in FIG. 1.

FIG. 4 is an explanatory view showing a housing cover 28 seen from the key insertion side.

FIG. 5 is a view showing a shape of a trigger 46.

FIG. 6 is a perspective view showing a lead formed on a motion conversion body.

FIG. 7 is a diagram showing a second restrained state.

FIG. 8 is a view showing a state in which a trigger is rotated to establish a connected state.

FIG. 9 is a diagram showing a state (No. 1) in which the connecting pin is retracted and returned to restore the trigger.

FIG. 10 is a diagram showing a state (No. 2) in which the connecting pin is retracted and returned to restore the trigger.

FIG. 11 is a diagram showing a state in which the engagement holes are displaced.

FIG. 12 is a diagram showing a curvature of a hook-shaped portion.

FIG. 13 is a block diagram showing a specific configuration of an electronic circuit of a key.

FIG. 14 is a sectional view of a cylinder showing a configuration of a second embodiment.

[Explanation of symbols]

10 electronic lock, 12 lock cylinder, 13 permanent magnet, 14 electronic key, 20 reed switch, 22 magnetic conducting member, 30 first rotating body, 32 second rotating body, 3
4 springs, 36 push rods, 44 connecting pins, 46
Trigger, 54 motion converter, 52 studs, 56 arms, 58 springs, 60 springs.

Continuation of the front page (56) Reference JP-A-6-73929 (JP, A) JP-A-63-142167 (JP, A) JP-A-3-147988 (JP, A) JP-A-1-154979 (JP , A) Japanese Patent Laid-Open No. 5-211747 (JP, A) Japanese Patent Laid-Open No. 2-288592 (JP, A) Japanese Patent Laid-Open No. 62-94679 (JP, A) Japanese Patent Laid-Open No. 4-93482 (JP, A) Japanese Patent Laid-Open No. 6-15993 (JP, A) Actual development Sho 59-10459 (JP, U) Actual public Sho 50-21039 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E05B 47/00 E05B 19/00 E05B 49/00

Claims (5)

(57) [Claims] 1. A first rotating body into which an electronic key is inserted, a second rotating body that engages with a locking / unlocking mechanism, and the second rotating body is held by the first rotating body and moves forward so that the second end has the second portion. Connecting pin for engaging the first rotating body and the second rotating body in rotation, a return spring for applying an urging force to the connecting pin in the backward direction, and an urging force weaker than the returning spring. And a feed spring that applies an urging force to the connecting pin in the forward direction, and a pushing force when the key is inserted to temporarily remove the urging action of the return spring to the connecting pin, and to pull out the key. A key interlocking mechanism that sometimes releases the accumulated biasing force of the return spring, a restricting member that restricts the advancement of the connecting pin by the feed spring in a state where the biasing action is removed, and a compatibility determination for the electronic key are obtained. In the case of Driven by deregulation, lock cylinder, characterized in that it comprises a driving unit which allows the engagement entry of the coupling pin. 2. The lock cylinder according to claim 1, wherein the regulating member includes a bearing portion to which a rotary shaft of the drive portion is fixed in order to change the posture of the regulating member from an upright state to an inclined state. In the upright state, the hook-shaped portion catches the protrusion formed on the connecting pin to restrict the forward movement, and allows the forward movement of the protrusion when in the inclined state, and the backward movement of the protrusion in the inclined state. A lock cylinder, which is formed with a restoration slope portion that raises the regulation member itself to an upright state by using sliding. 3. The lock cylinder according to claim 1, wherein the return spring includes a main spring in which elastic force is accumulated by a pushing action of the electronic key, and the key interlocking mechanism is connected to the main spring. A key for transmitting the push-in motion of the electronic key, an arm for pushing the connecting pin in the backward direction, and a motion conversion unit for converting the motion of the push bar into the motion of the arm. In the pulled-out state, the urging force of the return spring is transmitted to the connecting pin via the arm, and in the key-inserted state, the arm is flipped up to remove the urging action of the return spring. Cylinder for locks. 4. The lock cylinder according to claim 3, wherein, as the return spring, an auxiliary spring engaging with the arm is provided in addition to the main spring. 5. An electronic key to be inserted into a lock cylinder, the key being incorporated in the key body so as to face a magnet arranged in the lock cylinder when the key is inserted into the lock cylinder. And a magnetism sensor of the magnetic force sensor in the key body.
Power supply O when the magnetic force sensor detects the insertion of the key and the magnetic conducting member which is disposed in the vicinity of the magnetic field side and aims to converge the magnetic flux.
Key side that communicates with the electronic circuit on the lock cylinder side that becomes N
An electronic key including an electronic circuit .