DE19650847C1 - Security lock for door of housing - Google Patents

Abstract

The security lock device has a gripping device in which the insertion aperture for the key can be covered by a keyhole security device. The keyhole security device consists of a mechanically operated cover plate (2) with a counter bearing (6) on its free end. An electromechanical blocking device, in the form of a bistable magnetic lock, has a blocking element which can be brought into engagement with a bore in the counter bearing. There may also be an associated read head arrangement for contact free reading of a code carrier for lock releasing.

Description

The invention relates to a security lock for the door of a housing, in particular one Junction box of the telecommunications and data technology, in which the Insert opening for the key can be covered by a keyhole lock.

This is often the case in a large number of company and private institutions Necessity closets, housings and the like. By a security lock from foreign and protect unauthorized access.

In particular, in the field of telecommunications and data technology To accommodate and close connections of cables or data lines in such a way that changes to the connections by unauthorized persons are excluded can be. For this purpose, systems are known which are operated by keys. However, if such a key is lost, the finder is able to gain access to provide the appropriate facilities.

From DE 35 32 431 C2 is a key plate with a hinged lid known, in which the lid can only be moved if previously an electro mechanical safety locking device was activated or deactivated. In DE 89 02 827 U1 a keyhole cover is described by a magnetic key can be relocated.

Finally, DE 92 07 886 U1 should also be mentioned. This is a keyhole cover known that closes the keyhole automatically after a locking operation. The This lock is released via a pulse given to a solenoid.

The object of the invention is therefore to a security lock of the type mentioned create an additional security check before the Locking authorization can be obtained using the key.

This object is achieved in that the keyhole lock out a mechanically actuated cover plate, which is at its free end Has counter bearing and that an electromechanical lock is provided, the Locking member can be brought into engagement with a bore in the counter bearing.  

This electromechanical lock of the keyhole lock ensures that too the finder of a lost key is unable to access the to provide closed housing. Only when he is able to lock this the key can be inserted and thus the actual locking process to be triggered.

The lock can be designed in various ways, as in the Subclaims is specified.

The combination of the lock or a drive for the is particularly advantageous Keyhole security with a reading device for electronic code carriers.

Only the use of a correctly coded carrier then enables access, i. H. in this Case the insertion of the (mechanically suitable) key.

The code carrier can be in a separate part - for example a tool - are located. This tool can be a screwdriver, as was previously the case for pivoting the keyhole lock was used.

The independence of the code carrier from the key has the advantage that with one lost key, there is no need to remove the mechanical part of the key To replace the lock.

It is only necessary to change the coding to avoid misuse to prevent the key.

Another advantage of the invention results from the fact that it can be used in existing systems for example in the handle, which acts as a security lock part in the above Housing is used.

The invention will be explained below using examples shown in the drawings will.

It shows:

Fig. 1 is a front view of a known handle shell for telecommunications housing,

Fig. 2 and 3, an electromagnetic lock on the key hole fuse on the rear side of a grip shell according to Fig. 1 and

Fig. 4 shows a corresponding bi-stable magnetic lock.

Fig. 1 shows the front view of a so-called grip shell. This grip shell, which is designated by 1 , has a central opening into which a key can be inserted. Before this is possible, a keyhole lock must be operated. This consists of a pivotable disc or plate ( Fig. 2) on the back of the grip. The pivoting was previously carried out by means of a screwdriver with which the screw 3 is rotated.

Anyone can overcome this security.

According to the invention, an electromagnetic lock is now provided which pivots the keyhole lock is only allowed to authorized persons. This is proven Authorization, for example, by checking a corresponding code carrier. Only when the coding is found to be correct can the keyhole lock be activated be pivoted or moved so that only then the introduction of a key is possible.

The lock can consist of an electromagnet 4 , the armature 5 of which interacts with a corresponding counter bearing 6 on the keyhole lock. A bi-stable magnetic lock 7 can also be used. The locking or unlocking is carried out by moving the magnet armature under current.

Finally, there is also an electromotive swivel or shift drive for the Keyhole security possible.

These devices described above are activated by a read head, the - in the versions shown in the drawings - on the back of the Grip shell attached and conductively connected to the lock or the drive. Such a reading head interacts with a code carrier without contact, the z. B. at the Front is held against the handle. If this coding is correct, the lock is removed released and the keyhole lock can be turned by turning the slotted screw be pivoted so that the key for the actual locking process can be introduced.

The code carrier can also be part of the screwdriver for actuating the slotted screw be. In this case, the reading head must of course be at or near the slotted screw be arranged to enable data transmission.

Claims (5)

1. Security lock for the door of a housing, in particular a branch housing of telecommunications and data technology with a recessed grip, in which the insertion opening for the key can be covered by a keyhole lock, characterized in that the keyhole lock consists of a mechanically actuated cover plate ( 2 ), which has at its free end a counter bearing ( 6 ) and that an electromechanical lock is provided, the locking member of which can be brought into engagement with a bore in the counter bearing ( 6 ). 2. Security lock according to claim 1, characterized, that the electromagnetic lock is designed as a bi-stable magnetic lock. 3. Security lock according to one of the preceding claims, characterized, that the keyhole lock from a by an electric motor drive there is pivotable or displaceable disc. 4. Security lock according to one of the preceding claims, characterized, that the electromagnetic lock or the electromotive drive with a read head is conductively connected, via which a coding on a code carrier can be queried without contact and the lock or the drive can be activated. 5. Security lock according to one of the preceding claims, characterized, that connected to the keyhole lock an electrical-electronic unit is, which gives a signal after removing the key, through which the lock lockable or the keyhole lock can be moved back to its locked position is.