DE19948829C2 - Double lock cylinder - Google Patents

Description

The invention relates to a double lock cylinder.

From DE-OS 23 19 621 a lock cylinder housing is known in which in the front, the area facing the door fitting over a defined axial length External dimension is reduced, with a U-shaped part being pushed onto this area whose shape and wall thickness correspond to the reduction and compensate for this.

A correspondingly attached part can also be found in DE 37 34 539 A1.

In both cases, the aim is to improve the strength of the cylinder housing.

Finally, it is known from DE 43 14 903 A1, electronic components in a Attach the lock cylinder to the front.

In the case of locking cylinders which have an electronic read head attached, which with an electronically coded key interacts, this is to an external Evaluation unit connected, with which it can be checked whether the correct key has been introduced. If this is the case, a locking mechanism is released that the Actuation of the lock, that is, the execution of a closing operation.

Although the miniaturization of electronic components continues to advance, there are space problems with the arrangement of the read head or possible further electronic components in or on the lock cylinder housing. Here is namely also take into account that retrofitting an electronic Lock cylinder should be possible in existing openings or recesses on doors, if a purely mechanical lock was previously used there.

The object of the invention is therefore a double lock cylinder with an electronic Equip read head without changing its outer dimensions.  

This task is solved with a double lock cylinder

• - A pin housing in the front - the door fitting area a defined axial length, the side surfaces as well as the end face in the External dimensions are reduced;
• - A U-shape that can be pushed onto the reduced area Potting part attached to the pin housing, its wall thickness and its shape Pin housing is adjusted so that it is reducing the external dimensions compensates, with the two legs of the part on the side surfaces of the pin housing and the web of the part rest against the end face of the pin housing and
• - Inside the wall of the legs electronic components and conductors for one electronic reading coil provided on the inside in the web of the part, which with an electronically coded - in the key channel of the lock cylinder core insertable - flat key interacts.

The solution according to the invention has the advantage that the outer contour of the locking cylinder remains completely intact and can therefore be retrofitted by simply replacing it the locking cylinder is possible without making structural changes have to. Another advantage is that the internal structure of the lock cylinder need not be changed, d. H. no special clearance has to be created in the cylinder are used to integrate a reading coil into the locking cylinder, for example.

The solution according to the invention will be explained below with the drawings.

It shows:

Fig. 1 is a simplified side view of a double lock cylinder and

Fig. 2 shows schematically the structure of the attachable part.

The double locking cylinder has the usual contour, only the locking cylinder housing 1 being shown in FIG. 1. The upper cylindrical area receives the rotatable cores, while the tumblers are arranged in the pin housing. A mechanical locking device which cooperates with one of the cylinder cores is usually also arranged in this area, ie the rotation of the cylinder cores can be released or blocked depending on the respective state. For this purpose, a magnet armature is often used, the magnet coil of which can be activated or deactivated accordingly.

This solenoid is controlled via an electronic read head that responds to the electronic coding on or in a key. For this purpose, the key with its components containing the coding must be brought close to a reading coil 7 .

In the embodiment according to the invention, the outer dimension of the pin housing 4 is reduced, specifically on the side surfaces and in the end area. This is indicated by 3. Fig. 2 shows the slide-on U-shaped part 2 , the legs 5 come to rest on the side surfaces of the pin housing, while the web 6 rests on the end face.

The electronic reading coil 7 is arranged in the web area. A conductor foil 11 runs to the electronic components 9 indicated in the legs 5 . For the power connection or the connection to an external center, connecting wires 12 are provided. The electronic components 9 are located on a circuit board 10 . With 8 a reinforcement insert is indicated.

Part 2 is attached to the pin housing by pouring.

Claims (1)

Double lock cylinder with
a pin housing ( 4 ), in which in the front area - facing the door fitting - the side faces and also the end face in the outer dimensions are reduced to a defined axial length;
a part ( 2 ) which can be pushed onto the reduced area, has a U-shape and which is fastened to the pin housing ( 4 ) by casting, the wall thickness and the shape of which is adapted to the pin housing ( 4 ) in such a way that it compensates for the reduction in the external dimensions, the Both legs ( 5 ) of part ( 2 ) on the side surfaces ( 3 ) of the pin housing ( 4 ) and the web ( 6 ) of the part ( 2 ) on the end face of the pin housing ( 4 ) and
on the inside in the wall of the legs ( 5 ) electronic components ( 9 ) and conductors ( 11 ) for an inside in the web ( 6 ) of the part ( 2 ) provided electronic reading coil ( 7 ) are arranged, which with an electronically coded - in the Key channel of the lock cylinder core insertable - flat key interacts.