JPH0460076A - Key device - Google Patents

Abstract

PURPOSE:To reduced the power consumption by providing a mechanical key information detecting means and an electrical key information detecting means, and providing a control means exciting an electrical unlocking means with the abnormal key information from the electrical key information detecting means. CONSTITUTION:At the time of unlocking by a normal key 5, the coupling system of a mechanical key information detecting means detects correct shapes of key ridges 5a, 5b, and a detector 14 detects the electrical key information generated by a key signal generating means 11. A control circuit 15 collates the registered key information and the detected key information, a key barrel 3 is rotated by the angle alpha in the arrow A direction if they coincide, a switch 12 is turned on, and no power is fed to a solenoid 13. The key barrel 3 is rotated to the angle gamma over the angle beta, and a lock system 4 is unlocked. When illegal unlocking is attempted, the detector 14 detects no correct signal, and the circuit 15 operates the solenoid 13 on condition that the switch 12 is turned on. A lock member intrudes into a groove section 3b.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a key device equipped with mechanical and electrical unlocking means, and particularly to a key device that prevents unauthorized unlocking and is suitable for power saving. Regarding.

[Conventional technology]

Key devices are widely used, for example, on doors of houses and automobiles. This type of key device is installed on a wall 1, as shown in FIG.
A key barrel 3 is rotatably provided on the door 2, which is attached to the door 2 so as to be openable and closable.This #I barrel 3 is rotated when the key threads match, and operates the locking mechanism 4, which is the locking/unlocking means. The door is locked or unlocked by engaging or disengaging with a locking member (not shown) provided on the wall.

A slit-shaped keyhole 3a is formed in the front end face of the key barrel 3, and when the ts5 is inserted into the keyhole 3a, the shape of the key threads 5a and 5b formed on the key and the shape of the key threads 5a and 5b formed in the key barrel 3 are changed. When the shape of the engagement mechanism (not shown), which is a known mechanical key information detection means, matches, the key barrel 3 becomes rotatable. In this state, by rotating the key barrel 3 in the direction shown by arrow A using the key 5, the lock mechanism 4 is unlocked.

As a means to prevent unauthorized unlocking of this type of key device, for example, as described in Japanese Patent Laid-Open No. 63-93649, information is exchanged by magnetic coupling between the key barrel and the key. There are known methods that allow unlocking by determining the key, or methods that provide key information such as a bar code on the side of the key and read this code information to electrically operate the key mechanism.

[Invention or problem to be solved]

However, according to known electrical or electronic key devices, the lock can be unlocked only when the electrical key information on the key barrel side and the key side match when unlocking, so the power is cut off. There was a problem that the lock could not be unlocked if the power supply voltage dropped or the power supply voltage dropped.

An object of the present invention is to provide a key device that supplies the power necessary for electrical unlocking operation only when an unauthorized unlocking operation is performed to prevent the above operation, and also enables mechanical unlocking even when the power supply is abnormal. It is in.

Means for Solving Problem C] In order to achieve the above object, the key device of the present invention locks or unlocks the lock by inserting a key into a keyhole formed in a key barrel and rotating the key. means, provided on the key barrel,
mechanical key information detection means for mechanically detecting the key mountain shape of the key; electrical key information detection means for electrically detecting m information unique to the key; and rotation of the key cylinder to the unlocked position. an electrical unlocking device that prevents the locking device from moving and causes the blocking operation to be performed by energizing; and a control device that energizes the electrical unlocking device using unauthorized key information from the electrical key information detecting device;
It is equipped with the following.

[For production]

When the key is inserted into the keyhole of the key ring, mechanical and electrical key information is detected. The key barrel becomes rotatable when the regular mechanical key information is detected, and at the same time, the electrical unlocking means is not energized based on the regular electrical key information, so the rotation prevention operation of the key barrel is not performed. do not have. Therefore, the door is locked by turning the key.

When the door is locked, if you use the official key to unlock it,
The key thread and the locking mechanism on the key barrel side match, making it possible to unlock the lock mechanically. At the same time, the electrical key information specific to the key is detected and confirmed to match the regular key information registered in the control means. If this result is correct, the electrical unlocking means is not energized, so the key barrel can be rotated to the unlocked position, and unlocking is performed by rotating the key barrel through a predetermined angle. .

On the other hand, if an unauthorized key or a means other than the key is used to match the engagement mechanism inside the key barrel to unlock the lock, the electrical key information detection means cannot obtain the authorized key information, so the control means cannot detect the lock. The target unlocking means is energized to prevent the key barrel from rotating, making unlocking impossible.

By the way, if the power supplied to the electrical unlocking means is cut off or the voltage of the power supply decreases, the means becomes inoperable. Therefore, the lock can be electrically unlocked, and can be unlocked only by mechanical unlocking means, and will not become unlockable in the event of a power failure.

〔Example〕

Embodiments of the key device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the invention.

In this embodiment, parts that are the same as or equivalent to parts of the conventional example shown in FIG.

A means 11 for generating an electric key signal unique to the key is embedded in the head 5C of the key 5. The key signal generating means 11 may include an electric circuit element having a predetermined value of electric resistance, electric capacitance, coil, etc., a filter circuit or a resonant circuit consisting of a combination of these electric circuit elements, a magnetic memory element, an IC ( Memory elements such as integrated circuit) memory elements are used.

Electric circuit elements use their electrical constants, filter circuits and resonant circuits use their characteristic frequencies, and storage elements use codes stored therein as key signal means. On the other hand, a switch 12 is provided on the end surface of the key barrel 3 on the opposite side from the keyhole 3a, which is turned on when the key barrel 3 is rotated by a certain angle α in the direction indicated by arrow A from the locked position. When the lock fR ellipse 4 is rotated by a certain angle γ in the direction shown by arrow A from the m-lock position, the engagement with the wall 1 side is released and the door lock against the wall 1 is released. It is now possible to do so.

Further, a solenoid 13 is provided on the outer periphery of the key cylinder 3. As shown in FIG. 2, the solenoid 13 consists of an electromagnetic coil 13a and an iron core 13b as a locking member provided movably in the axial direction at the center of the electromagnetic coil 13a. They are arranged in the radial direction of the key barrel 3. Further, a groove 3b is formed in the direction of the central angle β at a position on the outer periphery of the key barrel 3 where the tips of the iron core 13b face each other. Then, by energizing the electromagnetic coil 13a, the iron core 13b moves toward the key barrel 3, and the iron core 13b moves toward the key barrel 3.
The tip of the groove 3b is configured to engage within the groove 3b. Note that the above angles are set in the relationship α<β<γ. That is, as for the relationship between the rotation of the key barrel and the above-mentioned parts, as shown in FIG.
It is configured so that the lock reaches the unlocked position (c).

Further, a detector 14 which is an electrical key information detection means is provided on the outer periphery of the tip of the key cylinder 3, and this detector 14 is connected to the key 5.
The key information emitted from the key signal generating means 11 embedded in the head 5C of is detected. Furthermore, switch 12. The solenoid 13 and the detector 14 are each connected to a control circuit 15 which is a control means. Fifteen unique key information used in this key device is registered in the control circuit 15. Then, the control circuit 15 compares the detected key information with the registered key information, and if they match, the switch 12
Regardless of whether the solenoid 13 is turned on or off, the solenoid 13 is de-energized and becomes inoperable. On the other hand, if the two pieces of information do not match, when the switch 12 is turned on, the solenoid 13 is energized and operated, and the iron core 13b is moved into the groove 3b of the key barrel 3 and opened/took.

Next, the operation of the above embodiment will be explained.

When locking with the regular key 5, the engagement mechanism, which is a mechanical key information detection means, detects the correct shape of the key threads 5a and 5b,
At the same time, a detector 14 detects electrical key information emitted from the key signal generating means 11. As a result, (1) ll3 can be rotated on the condition that both the mechanical and electrical key information match, and since the solenoid 13 is not energized, the locking member does not prevent the key barrel from rotating. key barrel 3
Locking is performed by rotating the door in the direction opposite to arrow A to bring it into the state shown in FIG. In this locked state, switch 1
2 is OFF and power is not supplied to the solenoid 13, so unnecessary power consumption can be avoided. That is, locking is performed mechanically as in the conventional case.

When unlocking with the regular key 5, the key barrel 3 becomes mechanically rotatable as in the case described above, and at the same time, the detector 14 detects electrical key information. The control circuit 15 compares the registered key information with the detected key information, and if they match, the key barrel 3 is rotated by an angle α in the direction of arrow A, and even if the switch 12 is turned on, the solenoid 13 is not activated. Control so that power is not supplied. Therefore, the lock member is attached to the groove 3 of the key barrel 3.
The key barrel 3 is not inserted into the interior of the key b, and the key barrel 3 can be rotated beyond the angle β to the angle γ to unlock the lock mechanism 4 6 On the other hand, a key without the electric key signal generating means 11 , the detector 14 will not detect a correct signal if an attempt is made to unlock the door with a key having a different electrical key signal generation means, or with a means other than the key. Therefore, the control circuit 15 energizes the solenoid 13 and operates it on condition that the signal is not correct and that the key @3 is rotated by an angle α in the direction of the arrow A and the switch 12 is turned on. As a result, the locking member plunges into the groove 3b of the tlI cylinder 3, as shown by the dotted line in FIG. Therefore, the key barrel 3 can only be rotated within the range of angle β and cannot be moved to the unlocked position of angle γ. In other words, it is impossible to unlock it.

Here, switch 12. The solenoid 13 constitutes an electrical unlocking means.

By the way, if the power necessary for the operation of the electrical unlocking means is cut off or the voltage drops and the means becomes inoperable, the solenoid 13 will not operate, which will hinder unlocking. Never.

According to this embodiment, if an attempt is made to open the lock with something other than the official [5], the solenoid 13 is activated and the rotation of the key barrel 3 is blocked, making unlocking impossible. It can be prevented. Further, even if an abnormality occurs in the power supply for operating the electrical unlocking means, the lock can be unlocked only by the mechanical unlocking means, so the key holder will not be unable to unlock the door. Furthermore, since power is supplied to the electrical unlocking means by operating the switch 12, unnecessary power consumption can be avoided.

Next, a second embodiment of the present invention will be described based on FIGS. 3 and 4. In this embodiment, the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted.

The feature of this embodiment is that a rectangular plate-shaped lid 21 is provided inside the keyhole 3a of the key barrel 3 so as to be openable and closable, and a switch 22 is provided at a position close to 1221 inside the key barrel 3a. One side of the lid 21 is rotatably attached to the end surface of the key barrel 3 inside the keyhole, and is always urged to rotate in the direction of closing the keyhole 3a by a spring (not shown). The lid 21 is opened to the position shown at 21a in FIG. 3 by inserting a key or the like into the keyhole 3a. Further, the switch 22 is turned on and off by opening and closing the lid 21, and corresponds to the switch 12 in the first embodiment.

Further, a bottomed hole 3C having an inner diameter slightly larger than the outer diameter of the iron core 13b is formed on the outer periphery of the key cylinder 3, which the tip of the iron core 13b of the solenoid 13 faces in the locked state.

Other components are the same as those in the first embodiment.

Next, the operation of the above embodiment will be explained.

When a key or other object is inserted into the keyhole 3a of the key barrel 3,
M21 opens and switch 12 turns ON. At this time, if the detector 14 does not detect regular key information, the control circuit 1
5 drives the solenoid 13 and causes the iron core 13 to plunge into the bottomed hole 3C of the cylinder 3. As a result, the floating tube 3 becomes unrotatable and cannot be unlocked.

If the inserted object is a regular key, the key pile 5a5b is detected by the mechanical key information detection means, and at the same time the detector 1
4 detects [5 unique electrical key signal 3]. Then, as in the case of the first embodiment, the operation of the solenoid 1413 is released, so the key barrel 3 becomes rotatable. Lock by rotating fi3 at a predetermined angle! ! 4 horizontal 4 can be unlocked.

This embodiment also provides the same effects as the first embodiment.

In the first and second embodiments described above, the electric key signal generating means 11 is provided in the key 5, but by providing the detector 14 with a function of detecting the shape of the key threads 5a and 5b of the key 5, , tII5 need not be provided with the electrical key signal generating means 11, and conventional keys can be used as they are.

〔Effect of the invention〕

As described above, according to the present invention, since the electrical unlocking means is added to the mechanical unlocking means, unauthorized unlocking can be prevented and the reliability of the key device is further increased. Moreover, even if an abnormality occurs in the power supply for operating the electrical unlocking means, the lock can be unlocked only by the mechanical unlocking means, so the key owner will not be unable to unlock the lock. Further, since the electrical unlocking means is energized only when the lock is unlocked illegally, unnecessary power consumption can be avoided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of a first embodiment of a key device according to the present invention, FIG. 2 is an explanatory diagram of the operation, and FIG. FIG. 4 is a sectional view showing m main parts facing the solenoid of the second embodiment, and FIG. 5 is a perspective view showing an example 3 of a conventional key device. 3f11 tube, 3a-=nail hole, 4...lock mechanism, 5a 5
b・Key pile, 13・Solenoid, 13b・・Iron core 14
Detector, 15. Control circuit.

Claims (1)

[Claims] (1) A locking/unlocking means that locks or unlocks the lock by inserting a key into a key hole formed in a key barrel and rotating the key, and a locking/unlocking means provided in the key barrel to mechanically detect the key thread shape of the key. mechanical key information detection means for electrically detecting key information unique to the key; and electrical key information detection means for electrically detecting key information unique to the key; A key device comprising: electrical unlocking means for causing the electrical unlocking to occur; and control means for energizing the electrical unlocking means using unauthorized key information from the electrical key information detecting means.