EP0298193B1 - Lock cylinder with electromagnetic tumbler - Google Patents

Abstract

Profile lock cylinders are conventionally equipped with a cylinder housing (1) consisting of two annularly cylindrical parts enclosing a beard recess between them and of a flat web part (1''') connecting these parts to one another and with a cylinder core (3) mounted rotatably in one annularly cylindrical part (1') thereof, secured by key-actuable tumbler pins (3', 4) and carrying the beard, and in said cylinder core (3) there can be an additional tumbler recess (3'') for a tumbler bar (13), engaging therein, of an electromagnetic tumbler (8) accommodated in the web part and consisting of an armature (12), coil winding and return spring (14). So that the electromagnetic tumbler (8) together with its functional parts can be accommodated in the cylinder housing more securely and without adversely affecting its mechanical tumblers (3', 4, 6), the electromagnetic tumbler (8) is arranged in the inner region of the web part (1'''), adjacent to the beard recess, laterally next to the tumbler pins (4) located therein and their bearing bores. The electromagnetic tumbler is advantageously designed as an electromagnetic clamp. <IMAGE>

Description

The invention relates to a profile lock cylinder, in particular intended for mortise locks, with a cylinder housing consisting of two ring-cylindrical parts enclosing a lock-bit recess between them and a flat web part connecting the latter to one another, and a lock-bearing that supports the lock bit in one of the ring-cylindrical parts and is rotatably supported by key-operated tumbler pins Cylinder core, which has an additional tumbler cutout for a tumbler bolt which engages therein and which can be adjusted parallel to the tumbler pins of an electromagnetic tumbler housed in the web part and consisting of armature, coil winding and return spring.

Profile lock cylinders of the above type are e.g. B. known from DE-OS 35 01 345. The additional electromagnetic guard locking is intended to combine the features of a block lock for switching an intrusion detection system with those of a normal security profile cylinder lock, with which it is not only the locking mechanism about the front door, but also the arming and disarming of the intrusion detection system. The functional parts of the electromagnetic tumbler are accommodated in the front end of the cylinder housing web part, the coil winding, its armature and the return spring being arranged similarly to the tumbler pins and their bearing holes, namely in the longitudinal center plane of the cylinder housing web part. However, this arrangement of the electromagnetic functional parts carries the risk of being easily damaged or manipulated from the outside. In addition, it is at the expense of the mechanical pin tumblers to be installed only in small numbers, unless the profile lock cylinder would be extended axially accordingly. Finally, such electromagnetic tumblers cannot be installed in profile lock cylinders belonging to existing locking systems.

The invention has for its object to provide a profile lock cylinder of the type mentioned, which does not have the aforementioned disadvantages, but is designed so that its electromagnetic tumbler is without any adverse influence on both its exterior and its internal mechanical tumblers, consequently can also be easily installed in the cylinders of existing locking systems and can also be housed in the profile locking cylinder in a more tamper-proof manner. This object is essentially achieved in that the electromagnetic tumbler is arranged in the inner region of the profile cylinder housing web part adjacent to the lock bit recess laterally next to the tumbler pins and their bearing holes therein. In this way, the built-in electromagnetic lock is not only protected in the lock cylinder, but also in a place where it is without anyone is a disruptive influence on the mechanical tumblers, so that the latter are retained to a conventional extent. The accommodation of the electromagnetic guard locking has no influence on the profile and the length of the conventional profile locking cylinder and can also be carried out retrospectively with locking system cylinders.

From WO 82/04459 it is known in a locking cylinder with a cylindrical cylindrical housing and a cylinder core arranged eccentrically therein, in addition to the mechanical tumblers present here in several radial planes, to provide an electromagnetic tumbler which has a tumbler bolt which can be adjusted parallel to the cylinder axis and which carries an armature is provided. This and the associated coil winding and a return spring are accommodated in an elongated installation housing that is inserted into a longitudinal groove machined in the wall section of the circular cylinder housing. This runs freely into the area of the locking bar, in which there is also the tumbler bolt attached to the armature end, which depending on its axial position either projects into a free-running ring groove on the facing cylinder core end or an axially extending locking groove. Apart from the variety of types of this locking cylinder, the installation of the electromagnetic tumbler is also at the expense of the installation of the mechanical tumblers which is necessarily limited to the thin-walled circular cylinder housing areas, which therefore also require a locking cylinder of larger radial dimensions for their accommodation. In addition, the tumbler bolt located in the lock bit area and the freewheeling and locking groove interacting with it also require larger longitudinal dimensions of the locking cylinder. Its electromagnetic tumbler design with its axially parallel guard locking bolt is unsuitable for profile lock cylinders.

According to a further feature of the invention, it has proven to be advantageous if, in addition to the armature, the coil winding and the return spring, the tumbler bolt of the electromagnetic tumbler is also accommodated in an installation housing and this in a correspondingly laterally located part in the web part of the cylinder housing, to the locking latch Recess immediately adjacent flat recess is installed. This enables separate production of the electromagnetic locking parts and their particularly simple installation, which can also be carried out subsequently, in conventional profile locking cylinders, whether in single or system cylinders. The electromagnetic guard locking can be used in a wide variety of ways, for example by electrical remote control, but also by the key itself, for example in the case of electronic key control and control.

According to a further feature of the invention, the electromagnetic tumbler is designed as an electric holding magnet. This makes it possible to operate the electromagnetic tumbler with extremely low electrical power, especially in battery mode.

Fig. 1

die Seitenansicht eines erfindungsgemäß beschaffenen Doppelprofil-Schließzylinders einer ersten Ausführungsform,

Fig. 2

eine der Fig. 1 entsprechende Ansicht auf eine zweite Ausführungsform eines Doppelprofil-Schließzylinders,

Fig. 3

in stark vergrößerter Darstellung den Querschnitt durch den Doppelprofilzylinder der Fig. 1, und zwar entsprechend der Schnittlinie III-III der

Fig. 4,

die einen Schnitt nach der Linie IV-IV der Fig. 3 zeigt, und

Fig. 5

eine der Fig. 4 entsprechende Schnittdarstellung, jedoch bei abweichend gestaltetem Ankerhebel.

Further features and advantages are described with reference to several exemplary embodiments of the invention shown in the drawing. It shows

Fig. 1

the side view of a double profile locking cylinder according to the invention of a first embodiment,

Fig. 2

1 corresponding view of a second embodiment of a double profile locking cylinder,

Fig. 3

in a greatly enlarged representation, the cross section through the double profile cylinder of FIG. 1, and that according to the section line III-III of

Fig. 4,

which shows a section along the line IV-IV of Fig. 3, and

Fig. 5

4 corresponding sectional view, but with a differently designed armature lever.

The double-profile locking cylinder shown in Fig. 1, which is intended and suitable in particular for mortise locks, has a cylinder housing 1, which consists of two ring-cylindrical recesses 1ʹ, 1ʺ, including a lock bit recess 2 between them, and a flat web part 1 verbind connecting the latter to one another . In the ring-cylindrical parts 1ʹ, 1ʺ of the cylinder housing 1 a key-operated cylinder core 3 is rotatably supported in a known manner, the rotary locking of the cylinder cores being effected in a conventional manner by mechanical pin tumblers. As shown in FIG. 3, these each consist of the core and housing pins 3 and 4, respectively, which are slidably accommodated in bearing bores in the core 3 and in the housing web part 1 sowie, and the tumbler spring 6 which is to be pressed in the direction of the key channel 5 5 suitable keys to be inserted, the tumbler pins 3ʹ, 4 can be moved so far that they release the cylinder core 3 for its rotational movement in the cylinder housing 1 and thus the cylinder core 3 and the locking bit 7, which is also pivotably mounted on its inner end via a conventional coupling.

In addition to the mechanical tumblers, there is also an electromagnetic tumbler, which is generally designated 8. This essentially consists of the installation housing 9 and the functional parts accommodated therein. These include the essentially W-shaped iron core 10 arranged in the installation housing 9 with the coil winding 11 encompassing its central web 10 ', which is on one side End 10ʺ of the iron core 10 pivotally resting armature lever 12, the tumbler lock 13 movable by it and the return spring 14 engaging the latter. The iron core 10 with the coil winding 11 and the pivotably resting armature lever 12 form an electro-holding magnet which, for its actuation, has only very low electrical line consumption requirement. The tumbler bolt 13 controlled by the armature lever 12 is designed as a low-mass, essentially A-shaped flat slide which, as shown in FIG. 3 in particular, is arranged on the tumbler pins 4 of the cylinder housing web 1 ‴ facing the inside of the installation housing 8. The upper end 13ʹ of the flat slide 13 engages in its high position held by the spring 14 in the additional tumbler recess 3ʺ present in the cylinder core 3, whereby the core 3 is additionally locked or locked against rotation. To unlock the coil winding 11 is energized, whereby the armature lever 12 is tightened and thereby the flat slide 13 is withdrawn from its locking position in the cylinder core 3 and can be held in its unlocked position for a long time. For this purpose, only a negligibly low current consumption is necessary, because in the unlocked position the armature lever 12 bears optimally on the iron core 10 of the electromagnet.

The installation housing 9 together with the mechanical and electromagnetic functional elements accommodated in it - as shown in particular in FIG. 1 - is accommodated in the inner region of the web part 1 angrenz adjoining the cam lock recess 2, specifically according to FIG. 3 to the side next to those located therein Tumbler pins 4 and their bearing bore. For this purpose, there is a corresponding laterally located flat recess 15 in the web part 1 ‴, which is preferably produced by milling. As shown in FIG. 3, both this flat recess 15 and the installation housing 9 Provide top and bottom with beveled guide surfaces 15ʹ, 15ʺ and 9ʹ, 9ʺ, which work together in a dovetail shape. Since the inclined surfaces 15ʹ, 15ʺ present in the web part 1 aus run out into the lock recess 2, the installation housing 8 together with its functional elements can be inserted axially into the flat recess 15 after it has been inserted into the lock recess 2 beforehand. It goes without saying that the dovetail guide surfaces 9ʹ, 9ʺ on the installation housing 9 may only extend axially as far as the axial width of the cam lock recess 2 in the cylinder housing 1 permits. After the installation housing 9 has been pushed into the cutout 15, the installation housing can be secured against axial displacement by simple caulking at about the point 16.

The coming from the coil winding 11 power cable 16ʹ can lead to a remote control center and power supply source. The cable 16ʹ is laid in a longitudinal groove 17 milled laterally in the web part 1 ‴ in such a way that it does not hinder the installation of the profile cylinder 1 in the mortise lock provided with correspondingly profiled push-through openings. The groove 17 runs closely below the lock bit recess 2, which is only comparatively little recessed here, because in the illustrated embodiment the lock bit 7 is kept comparatively short and therefore only requires a correspondingly flatter recess 2.

In the web part 1 ‴ of the profile cylinder housing 1 in the embodiment shown in FIG. 1 there is also a signal receiver 18 to be acted upon by the appropriate key, via which it can be read whether the lock is also actuated by the correctly coded electronic key. If this is the case, the coil winding of the electromagnetic tumbler 8 is energized via the cable 16ʹ and thereby the tumbler bolt 13 is moved back, so that the core 3 is thereby released for its rotary actuation.

In the embodiment shown in FIG. 2, the installation housing 9 is only inserted and glued into the shallow recess 15 in the web part 1 ‴ of the cylinder housing 1. For this purpose, it can advantageously also consist of plastic. In this case, there is no need for inclined guide flanks between the housing web part 1 ‴ and the installation housing 9. Furthermore, the profile lock cylinder shown here has a lock bit 7ʹ of conventional length, which requires a correspondingly deep recess 2ʹ in the cylinder housing 1. Here, the power cable 16ʹ is led out laterally from the housing 9 containing the electromagnetic tumbler, but this does not rule out the fact that it can also be passed through the lock housing to the other lock or cylinder side in this case.

While in the exemplary embodiment shown in FIG. 4 the armature lever 12 is designed as a one-armed lever and one end rests against the leg end 10ʺ of the electromagnet, the armature lever in the case of FIG. 5 is designed as a two-armed balancing lever 12ʹ. For this purpose, it is extended beyond its bearing point on the leg 10ʺ of the electromagnet and provided here with a compensation weight 19. At its other end, the armature lever 12ʹ, like the armature lever 12 according to FIG. 4, engages with a lateral bend 12ʺ in the driver recess 13ʺ present in the flat slide 13, as can be seen in particular in FIG. 3.

In all cases, care is taken to ensure that the comparatively low-mass design of the moving parts of the electromagnetic tumbler 8 is largely insensitive to manipulation attempts in the form of blows to the cylinder, key or fitting. This is also used in the case of FIG. 5 on the double-arm anchor lever 12ʹ existing compensation weight 19. Due to the narrow nature of the flat slide 13 and its comparatively far inward arrangement, the stroke required for locking and unlocking the core 3 and thus also its additional guard locking recess 3ʺ can be kept comparatively small, even though the one present on the flat slide 13 Locking lug 13ʹ in the locking position still engages deep enough in the recess 3ʺ of the core.

Various modifications are possible within the scope of the present invention. So it goes without saying that the installation housing 9 can not only consist of plastic, but also of other material, for example, like the lock cylinder, can also consist of brass or the like. In addition, the built-in housing 9 containing the electromagnetic tumbler 8 is not only to be retrofitted into existing locking cylinders, but is also just as easy to remove therefrom and, if necessary, to replace it with a blind installation unit if, for example, an additional electromagnetic locking of the cylinder is to be deliberately avoided. A hardened steel plate or the like can also be embedded in the end of the cylinder housing as a drilling protection. Moreover, it goes without saying that the flat slide valve 13 can alternatively be brought and held in the locking position by a spring in the release position and by current excitation.

Claims (10)

1. Profiled lock cylinder, particularly for mortise dead locks, with a cylinder housing (1) which consists of two cylindrical parts (1', 1'') which enclose a key bit opening (2) between them and a flat crosspiece (1''') which connects these two parts to one another, and with a cylinder core (3) which bears the key bit (7), is rotatably mounted in one cylindrical part (1') of the cylinder housing and is secured by key-actuated pin tumblers (3', 4), the cylinder core having an additional tumbler opening (3'') for a tumbler lock (13) which engages therein and is adjustable parallel to the tumbler pins, this tumbler lock belonging to an electromagnetic tumbler (8) which is accommodated in the crosspiece (1''') and consists of an anchorage (12), a coil winding (11) and a return spring (14), characterised in that the electromagnetic tumbler (8) is arranged in the inner region of the crosspiece (1''') of the profiled cylinder housing adjoining the key bit opening (2) beside the pin tumblers (4) which are laid therein and their bearing bores.
2. Profiled lock cylinder as claimed in claim 1, with an insert housing containing the anchorage (12), the coil winding (11) and the return spring (14) of the electromagnetic tumbler (8), characterised in that the tumbler lock (13) is also installed in the insert housing (9) and this latter is inserted into a flat recess (15) placed correspondingly laterally in the crosspiece (1''') of the cylinder housing immediately adjacent to the key bit opening (2).
3. Profiled lock cylinder as claimed in claim 2, characterised in that the lateral flat recess (15) in the cylinder housing crosspiece (1''') and the insert housing (9) have upper and lower guide surfaces (15', 15'' and 9'' 9'' respectively) which co-operate in a dovetail fashion and are appropriately inclined, and the length of these guide surfaces does not go beyond the axial longitudinal extent of the key bit opening (2).
4. Profiled lock cylinder as claimed in claim 2, characterised in that when the insert housing (9) is inserted in the recess (15) in the cylinder housing crosspiece (1''') it is secured, for example by simple wedging, against axial displacement.
5. Profiled lock cylinder as claimed in claim 2, characterised in that the insert housing (9) is glued into the lateral recess (15) in the cylinder housing crosspiece (1''').
6. Profiled lock cylinder as claimed in one of claims 1 to 5, characterised in that the electromagnetic tumbler (8) is constructed as an electro adhesion magnet.
7. Profiled lock cylinder as claimed in claim 6, characterised in that the electromagnetic tumbler (8) consists of a substantially W-shaped iron core (10) arranged so that it lies in the insert housing (9) with the coil winding (11) engaging around its central part (10') and an anchor lever (12) resting so that it can be swivelled on one end (10'') of the iron core (10), and the other end of the anchor lever and a lateral bend (12'') present on it engage in a carrier opening (13'') in the tumbler lock (13) which is mounted so as to be vertically movable in the insert housing (9) and which by means of the return spring (14) engaging on it can be kept in locking engagement with the additional tumbler opening (3'') in the cylinder core (3) and can be disengaged therefrom by current excitation of the electromagnet (8).
8. Profiled lock cylinder as claimed in claim 7, characterised in that the anchor lever (12) is constructed as a two-armed balance lever (12'), is lengthened beyond its bearing point on the iron core (10) and is here provided with a compensation weight (19).
9. Profiled lock cylinder as claimed in one of claims 6 to 8, characterised in that the tumbler lock is constructed as a low-mass substantially A-shaped flat slide (13) which is arranged on the inner face of the insert housing (9) facing the tumbler pins (4) of the cylinder housing crosspiece (1''').
10. Profiled lock cylinder as claimed in one of claims 1 to 9, characterised in that the insert housing (9) is made from plastics material.

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