EP0324096B1 - Locking cylinder, especially a cylinder for a mortise lock - Google Patents

Abstract

Profiled lock cylinders are equipped with a cylinder housing (1) and with a cylinder core (2) which is mounted rotationally adjustably in this and which can be secured against unauthorised rotation by key-actuable tumbler elements (7, 8) and by a blocking element (12) actuable by means of an electromagnet (13), there being furthermore control electronics actuating the electromagnet (13), together with an associated power supply switch (19). The power supply switch is designed as a magnetosensitive switch (19) which is accommodated in the cylinder housing (1) and its actuating magnet (20) is coupled motionally to one of the tumbler elements (8) located on the housing. The switch (19) advantageously consists of a reed contact. <IMAGE>

Description

The invention relates to a locking cylinder, in particular a profile cylinder intended for mortise locks, which is provided with a cylinder housing and a cylinder core, which is rotatably mounted therein and carries a lock bit, which is to be secured against unauthorized twisting by means of tumbler elements which can be acted upon by a key and a locking element which can be actuated by means of an electromagnet. and wherein control electronics actuating the electromagnet and associated power supply switch are provided.

Lock cylinders of the above type are known, for example, from AU-PS 320466. The control electronics are housed in the lock case containing the profile cylinder. A microswitch is built into their power supply line, which, when the cylinder core is rotated, has a mechanical and electronic coding that matches it provided key can be actuated either by a pivoting tumbler plate or by a cam disc that is fixed on the cylinder core next to the lock bit. In a profile lock cylinder known from DE-OS 3501345, which is also provided with an electromagnetic tumbler, some of its tumbler pins serve as switching contacts via which an intrusion detection system can be armed. The mechanical switch contacts present in these previously known lock cylinders are, however, prone to contamination and corrosion, so that switching difficulties arise with increasing operating time, especially since such contacts are also exposed to mechanical stresses and damage if the lock or key is used. Their electrical contact resistance increases over time, which becomes all the more disadvantageous in the long run when the locks are operated in a power-saving manner, particularly when they are supplied with batteries, as is usually the case.

The invention is therefore based on the object of providing a locking cylinder of the type mentioned at the outset which does not have the abovementioned shortcomings, but rather ensures simple, undisturbed and energy-saving power supply for the associated control electronics. This object is achieved in that the power supply switch belonging to the control electronics is designed as a magnetosensitive switch accommodated in the cylinder housing, the actuating magnet of which is coupled in terms of movement to one of the housing-side tumbler elements. This ensures that when the appropriate key is inserted, the actuating magnet is brought into the closing, shifting positions like a tumbler element in the magnetosensitive switch and thus the control electronics are supplied with power. Since the magneto-sensitive switch works without contact and is not exposed to any risk of corrosion or contamination, it remains permanently functional with a consistently low electrical contact resistance.

In the case of a locking cylinder, the tumbler elements of which consist, in a known manner, of core and housing pins which are displaceably mounted in the bores in the cylinder core and housing, and springs which act on the latter, the actuating magnet is advantageously designed as a cylindrical-pin-shaped permanent magnet and in the outermost tumbler bore between the housing pin therein and its actuating spring arranged, the magnetosensitive switch is further accommodated in a housing recess which is adjacent to the aforementioned tumbler bore, in particular runs parallel to the latter and is laterally offset relative to the other tumbler bores. The magnetosensitive switch is advantageously designed as a reed contact. However, it can also be designed as a Hall sensor or as a Wiegand sensor.

The lock cylinder can also be provided in a manner known from DE-OS 3500353 with a detector attached to the end of the cylinder housing for electronic data and energy exchange between control electronics and key, whereby according to a further feature of the invention the cylinder housing is covered on the end side by a plastic cap containing the detector which also engages under the outermost housing tumbler pin hole. This not only leads to a suitable accommodation of the detector to be mounted on the front side and also the actuating magnet for the magnetosensitive sensor to be accommodated in the adjacent tumbler pin bore, but also brings with it greater security against break-open of the profile cylinder. The usual use of pliers to break open such profile cylinders on the front side of the cylinder housing, which mostly does not protrude from the door fitting, leads only to the breaking or removal of the plastic cap and thus to damage of the electrical parts located here, but not to the otherwise connected break-off of the profile cylinder in its central area particularly endangered by the lock bit recess and the retaining screw bore.

The plastic cap is expediently clipped onto the cylinder housing, whereby it protrudes with a projection on its bottom into the housing locking pin bore which it covers on the underside and, with its upper concave edge edge, engages behind a collar projection provided on the end face of the cylinder core and provided with a corresponding undercut. As a result, the plastic cap can easily be mounted on the correspondingly flattened cylinder housing in this area. With an appropriate surface finish, it also ensures an appealing appearance of the locking cylinder section protruding from the door fitting.

Fig. 1

einen senkrechten Schnitt durch die eine Hälfte eines entsprechend beschaffenen Profilschließzylinders in dessen Ruhestellung,

Fig. 2

die gleiche Schnittansicht durch den Profilzylinder, jedoch bei teilweise eingestecktem Schlüssel,

Fig. 3

einen Teilschnitt nach der Linie III-III der Fig. 2,

Fig. 4

eine vergrößerte Schnittdarstellung des Profilzylinders im Bereich seines Stromversorgungsschalters,

Fig. 5

eine Stirnansicht und

Fig. 6

eine Seitenansicht auf das Zylindergehäuse,

Fig. 7

und 8 eine Stirnansicht und einen senkrechten Schnitt durch die Kunststoffkappe und

Fig. 9

eine teilweise geschnittene Seitenansicht des Profilzylinders beim Aufklipsen der Kunststoffkappe.

In the drawing, an advantageous embodiment is shown according to the invention. Show

Fig. 1

a vertical section through one half of a suitably designed profile locking cylinder in its rest position,

Fig. 2

the same sectional view through the profile cylinder, but with the key partially inserted,

Fig. 3

3 shows a partial section along the line III-III of FIG. 2,

Fig. 4

an enlarged sectional view of the profile cylinder in the area of its power supply switch,

Fig. 5

a front view and

Fig. 6

a side view of the cylinder housing,

Fig. 7

and FIG. 8 an end view and a vertical section through the plastic cap and

Fig. 9

a partially sectioned side view of the profile cylinder when clipping on the plastic cap.

The profile lock cylinder shown in Figs. 1 and 2 has a correspondingly profiled cylinder housing 1, in the hollow cylindrical region 1 'of the rotatably mounted cylinder core 2 is housed. On its opposite side there is a further, correspondingly rotatably mounted cylinder core 2 '. Between the two cylinder cores is rotatably supported in the housing recess 1˝ of the locking bit 3, which can be coupled to the respective associated cylinder core 2 for rotary driving via the rotatably connected coupling pieces 4 and their axial displacement when the key 5 is inserted. The key channel 6 provided with corresponding profile ribs in the cylinder core 2 serves to receive the key 5 to be inserted.

The cylinder core 2 is rotationally locked to the cylinder housing 1 by means of pin tumblers of conventional designs. These tumblers consist of the core and housing bores 2‴ or 1 ‴ seated core pins 7 and housing pins 8 and the pressure springs 9 acting on the latter. The key cuts or notches 5 'present in the key shaft make the tumbler pin pairs 7, 8 at Inserting the key 5 so displaced against the action of its springs 9 that the joint 10 located between each pin pair comes into agreement with the separating surface 11 located between the cylinder housing 1 and cylinder core 2, so that the core 2 relative to the housing 1 by means of the inserted key 5 could basically be twisted.

In the present case, however, the core 2 is additionally blocked against rotation by the armature 12 of an electromagnet 13, which acts as a locking bolt and is accommodated in the bore 14 of the cylinder housing 1. The head 12 'of the armature 12 engages under the action of the compression spring 15 in a recess on the cylinder core 2 on its circumference 16. To actuate the electromagnet 13 and its armature 12 is a not shown, in the castle or better still on the inside of Control electronics housed in the door fitting, which, via the detector 17 mounted on the end face of the cylinder, with the key 5, which also contains a non-mechanical coding, in mutual electronic data and bring energy exchange. If the inserted key 5 also has the appropriate non-mechanical coding, the control electronics respond and ensure that the electromagnet 13 is briefly acted upon by current. As a result, its armature 12 moves out of the recess 16 in the cylinder core 2, causing the latter to twist and thus correspondingly close the Castle can be made.

The power supply to the control electronics is expediently carried out in an energy-saving manner by means of a battery (not shown), if possible also accommodated on the inside of the fitting. For this purpose, the magnetosensitive switch in the form of the reed contact 19, which is accommodated in the recess 18 in the cylinder housing 1, is installed in the power supply line leading to the control electronics. The magnet required for its actuation is designed as a cylindrical-pin-shaped permanent magnet 20 which is accommodated between the housing pin 8 'seated in the outermost housing bore 1 ^IV ' and its actuating spring 9 '. The magnet 20 is so as the pin 8 'slidably mounted in the housing bore 1 ^IV . When the key 5 is inserted into the key channel 6 of the cylinder core 2, there is a corresponding multiple displacement of the permanent magnet 20, as shown in particular in FIGS. 2 and 4, which in this case the reed contact 19 after reaching the minimum displacement X min (FIG 4) switches on. It does not matter that the reed contact 19 is switched on and off several times when the key is inserted, since the control electronics, once switched on, take into account a time interval to neglect these additional switches on and off.

The front side of the cylinder housing 1 is covered by a plastic cap 21, which forms the detector 17 and forms a coil of the control electronics, which also has the outermost one Housing magnet containment pin bore 1 ^IV engages under permanent magnets 20. The plastic cap 21 is clipped onto the cylinder housing 2 in such a way that it protrudes with a projection 21 'present on its bottom into the housing retaining pin bore 1 ^IV covered by it on the underside, while with its upper concave-shaped edge 21' behind one present on the end of the cylinder core 2 , with an appropriate undercut 2 ‴ provided collar projection 2 ^IV . The plastic cap 21 is flush with the outside in the overlap area on both sides and below with corresponding flats 22 and 22 'provided cylinder housing 1. On the front side, the plastic cap 21 protrudes somewhat over the end face of the cylinder core 2, whereby the detector coil 17 housed in the plastic cap in the End face 5˝ of the key 5 housed counter detector can come particularly close. As further shown in FIGS. 5 and 6, a horizontally running longitudinal cable channel 23 is cut out on one long side of the cylinder housing 1, which merges into a vertically running transverse cable channel 24 on the end face. Through these channels, the power lines shown by the coil detector 17 and by the reed contact 19 can be passed gently, so that they do not interfere with the assembly of the profile cylinder in the lock, especially since they or the like in the channels 23, 24 by resin can be set. Like the control electronics, these lines are not particularly shown in the drawings.

When the key 5 is inserted into the key channel 6 of the profile locking cylinder, the reed contact 19 is first closed via the correspondingly displaced permanent magnet 20 and the power supply to the control electronics is thus switched on. As soon as the key is completely inserted and its coding has been recognized as correct by the switched-on control electronics, the latter ensures that the electromagnet 13 is briefly flowed through by current, whereby its anchor bolt is pulled out of the recess 16 in the core and the core is released for its rotation by the inserted key, after the mechanical tumbler pin pairs have already been correspondingly adjusted and thereby brought into the separation position between core 2 and cylinder 1. The release position of the anchor bolt 12 can be maintained by means not shown here until the key 5 is extracted again. The electromagnet 13 therefore only needs to be flowed through by the current for a short time. A further requirement for a correspondingly energy-saving battery operation of the electronic cylinder 13 is that the control electronics be switched on by the permanent magnet 20 acting on the reed contact. This switching on takes place for a short period of time both when the key 5 is inserted and when it is removed.

Various modifications are possible within the scope of the present invention. In particular, the reed contact 19 can in principle also be replaced by a Hall sensor or a Wiegand sensor of known design and mode of operation, as a result of which the control electronics can also be switched on in conjunction with a key-operated pin tumbler. The cap 21 is advantageously made of insulating plastic. It makes the locking cylinder protruding a maximum of 3 mm from a security shield optically advantageous and at the same time difficult to attack. Finally, it goes without saying that the invention is fundamentally also applicable to other tumbler elements, e.g. Tumbler plate, provided locking cylinders is usable.

Claims (9)

1. Lock cylinder, in particular for mortise locks, having a cylinder housing (1) and a cylinder core (2), which is rotatably adjustably mounted therein and carries a lock beard, and is secured against unauthorised turning by key-operated tumbler elements (7, 8) and a stopping element (12), which is actuatable by means of a solenoid (13), and an electronic control, which actuates the solenoid (13), together with associated power supply switch (19), characterised in that the latter is in the form of a magneto-sensitive switch (19), which is accommodated in the cylinder housing (1) and whose actuating magnet (20) is coupled with respect to movement to one of the tumbler elements (8′) on the housing side.

2. Lock cylinder as in claim 1, whose tumbler elements comprise core and housing pins, which are displaceably mounted in bores in the cylinder core and housing, and springs which act on the pins, characterised in that the actuating magnet is in the form of a permanent magnet (2), which is in the form of a cylindrical pin and is disposed in the outermost tumbler bore (1^IV) between the housing pin (8′) therein and its stressing spring (9′), and furthermore in that the magneto-sensitive switch (19) is accommodated in a housing recess (18), which is adjacent to the above-mentioned tumbler bore (1^IV), extends in particular in parallel with the latter and is laterally offset with regard to the other tumbler bores (1‴).

3. Lock cylinder as in claim 1 or 2, characterised in that the magneto-sensitive switch comprises a reed switch (19).

4. Lock cylinder as in claim 1 or 2, characterised in that the magneto-sensitive switch (19) is in the form of a Hall sensor.

5. Lock cylinder as in claim 1 or 2, characterised in that the magneto-sensitive switch (19) is in the form of Wiegand sensor.

6. Lock cylinder as in any of claims 1 to 5, having a detector, which is mounted on the end face of the cylinder housing, for electronic data and energy exchange between the electronic control and the key, characterised in that the end face of the cylinder housing (1) is covered by a plastic cap (21), which contains the detector (17) and which also engages under the outermost housing tumbler pin bore (1^IV).

7. Lock cylinder as claimed in claim 6, characterised in that the plastic cap (21) is clipped on to the cylinder housing (1), wherein it projects by means of a projection (21′), which is provided on its base, into the housing tumbler pin bore (1^IV), the underside side of which it covers, and it engages by means of its upper concave edge (21˝) behind a collar projection (2^IV), which is provided on the end face of the cylinder core (2) and is provided with a corresponding undercut (2‴).

8. Lock cylinder as in claim 6 or 7, characterised in that the plastic cap (21) is flush on the outside with the cylinder housing (1), which in its area of alignment is correspondingly flattened on both sides and underneath, and projects over the end face of the cylinder core (2) on the end.

9. Lock cylinder as in any of claims 6 to 8, characterised in that a longitudinal cable channel (23) is recessed on one longitudinal side of the cylinder housing (1), extends horizontally close to its cylindrical region (1′) and, on the end face, becomes a vertically extending transverse cable channel.

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