EP2998478B1 - Mortise lock for a door and lock set for a door - Google Patents

Description

The present invention relates to a mortise lock for a door, comprising a lock housing, a lock cylinder arranged on the lock housing and a guided on the lock housing, displaceable between an ejected and a retracted position locking element and a power transmission device between lock cylinder and locking element for retracting the locking element by means of the lock cylinder. Moreover, the present invention relates to a lock set for a door, with a mortise lock according to one of the preceding claims and a mechanical key for actuating the lock cylinder of the mortise lock.

Mortise locks for doors are known from the prior art. Such mortise locks are inserted into a recess in the door leaf and screwed by means of a forend on the door leaf.

From the DE 10 2011 116 049 A1 is a mortise lock with a pusher, a lock bolt and an activatable coupling member between pusher and bolt known. The lock bolt can only be actuated by means of a pusher when the clutch is closed. In addition, the mortise lock on a lock cylinder, which is in contact with the lock bolt. As a result, the lock bolt can be actuated in a conventional manner by means of lock cylinder. Thus, in the Although known mortise lock an electronic authorization check possible, but the mortise lock can also be opened by means of lock cylinder. In that regard, the security of this mortise lock corresponds to the security of a conventional mortise lock with lock cylinder.

DE 20 2007 016 556 U1 shows a lock with features of the preamble of claim 1. WO 2004/057 137 A1 shows a locking device in the form of a double lock cylinder arranged in the lock cylinder coupling element. EP 1 113 130 A1 shows a coupling mechanism for electronic locks, in which coaxially arranged, each bearing a knob shafts for lock actuation by a coupling element are coupled together.

The present invention is therefore based on the object to enable with simple structural means a higher security against manipulation of a mortise lock.

The above object is achieved by a mortise lock with the features of claim 1. The mortise lock of the type mentioned is configured and further developed such that the power transmission device is associated with a controllable coupling device for producing or enabling a power transmission between lock cylinder and locking element in case of legitimate access.

By enabling or producing a power transmission is to be understood that a coupling between a Power transmission elements of the power transmission device is made possible.

It can be provided a mortise lock with greater security against manipulation, when the power transmission device for transmitting a force between the lock cylinder and the locking element is associated with a coupling device which can be controlled to produce or allow a power transmission between lock cylinder and locking element. The power transmission is interrupted when the mortise lock or the door is closed. In other words, a force transmission between the lock cylinder and the locking element causing elements in this state are decoupled from each other. The lock cylinder and thus also the cam can be rotated, but the locking element is not actuated.

Only in the presence of a legitimate access, which can be determined, for example, as a result of reading out a transponder having a stored authorization, the coupling device is activated. The power transmission is then made. In other words, a force transmission between the lock cylinder and the locking element causing elements are then coupled together. As a result, upon actuation, namely a rotation of the lock cylinder, the locking element can be retracted. The lock bit of the lock cylinder can retract the lock element by the power transmission elements coupled in the authorized state. The mortise lock or, if necessary, the door are then opened.

Conventional mortise locks can be easily replaced with the mortise lock according to the invention. Thus, a wiring of the mortise lock is not required, since an energy storage can be provided in the lock housing. In addition, the previously used lock cylinder can be reused, since only an exchange of the mortise lock is required. An exchange of existing locking systems is thus eliminated. Thus, the use of electromechanical locking systems in the private sector, for example, on conventional front doors, allows. A lock opening by manipulation of the lock cylinder, for example by lock picking is thus prevented.

The locking element may be a latch bolt or a latch.

The power transmission device further has, according to the invention, a first force transmission element and a second force transmission element. This creates a simple and sufficiently stable option for transmitting power from the lock cylinder to the locking element. In addition, the coupling device acts between the first power transmission element and the second power transmission element and may possibly also be positioned there, so that an adaptation of the lock cylinder and locking element is not required.

Concretely, the first power transmission element can be guided as a lock housing and with a lock bit the pressure acting on the profile cylinder pressure piece, in particular as alternating pressure piece, be formed. Thus, a force can be applied to the first power transmission element with the cam of the lock cylinder and transferred from there to other power transmission elements.

The second power transmission element may be pivotally mounted on the lock housing and engaged with the locking element. In this way, a force applied to the second force transmission element can be converted by the pivotable mounting into a moment and thus the locking element can be actuated.

Specifically, the power transmission element may be formed as a change arm. This allows a reliable operation of the locking element allows. It is particularly advantageous if the second power transmission element is designed as a nut center part. In this way, only one force transmission element is engaged with the locking element, so that it only requires an engagement section for a force transmission element. Thus, the locking element can be designed structurally simpler. Due to the integration of the second power transmission element, namely a change arm, and the actuating element between follower and latch in a component, namely the nut center part, the structural complexity within the mortise lock is considerably reduced.

The coupling device may have a coupling element, which is displaceable in such a way that it is possible to transmit a force in such a way that the first Power transmission element and the second power transmission element are coupled in legitimate access by means of the coupling element or come into contact. In other words, the coupling element is displaceable in such a way that the first force transmission element and the second force transmission element can be coupled with each other if they have legitimate access. A power transmission from the first power transmission element to the second power transmission element is then possible. Coupling device or coupling element can be arranged on or in the intermediate space between the first power transmission element and the second power transmission element. Thus, for the structural integration of a coupling device or a coupling element, only an adaptation of the first power transmission element and the second power transmission element is required. An adaptation of further, a power transmission from the lock cylinder on the locking element effecting components is not required.

The coupling device may have an actuator for actuating the coupling element. Thus, a coupling and decoupling of the first and the second force transmission element are made possible in a simple manner. The actuator can be driven by an electric motor or electromagnetically.

The coupling device, in particular the coupling element, may have a return device, which enables a displacement of the coupling element in a disengaged position when the actuator is inactive. In the disengaged position, the first power transmission element and the second power transmission element are actuated by actuation of the Locking cylinder can not be coupled together. The return device may be formed as a return spring. This leads to an energy saving, since the retrieval or displacement of the coupling element can be done in the disengaged position by the return spring without assistance or assistance from the actuator. The return spring may be connected at one end to the coupling element and connected at the other end fixed to the housing or a lock component attached to the housing.

On the lock housing operable by means of a door handle nut can be pivotally mounted and the nut can be assigned to another controllable coupling element for producing a power transmission between the nut and the case. In other words, the nut with the nut central part can not be rigid, but be connected by means of a controllable coupling element. When the mortise lock or the door is closed, the nut and nut center are decoupled. Thus, the nut can be operated via a door handle, but this does not cause a lock opening. In the presence of a legitimate access, which can be determined, for example, as a result of reading out a transponder having a stored authorization, the further coupling device is activated. The nut is then coupled to the nut center portion so that upon actuation of the nut the trap may be retracted by the nut center portion.

For controlling the actuator, a control device may be provided. The control device can detect whether a legitimate access exists and make a control of the actuator in case of authorized access.

It is advantageous if the control device has a transmitting / receiving unit for communication with a transponder having an access authorization. Thus, it is possible to communicate with the transponder via the transceiver unit and determine whether it contains an access authorization, for example in the form of a stored key. If there is authorized access, the actuator can be controlled accordingly.

The transmitting / receiving unit can have a communication element for inductive, capacitive or radio-based data transmission. Thus, a desired type of communication transmission can be realized, for example, also depending on the prevailing at the door environmental conditions, which depend primarily on the material of the door panel.

For energy supply of lock components, an energy storage can be provided. It is advantageous if the energy storage is arranged in the lock housing. Thus, a conventional mortise lock can be easily replaced with the mortise lock according to the invention. Cabling effort is eliminated. By the energy storage lock components, in particular actuator, control device, transmitting / receiving unit and / or communication element can be supplied with energy. The energy storage can be rechargeable or non-rechargeable batteries or batteries.

The control device has a measuring element for detecting a drop below limit values of the energy storage voltage. The measuring element can be used to detect whether and when an energy storage warning level, For example, a voltage limit, falls below. Falling below this limit, the actuator, the first power transmission element and the second power transmission element permanently coupled together. Thus, an opening of the mortise lock even with energy storage with low voltage or discharged energy storage is possible. It is conceivable that the controller can detect a falling below two defined limits of the energy storage voltage. When falling below a first energy storage voltage value, a required replacement of the energy storage can be signaled, for example by a display or a light source, in particular an LED. A coupling of the power transmission elements is not yet made in this state, since the energy storage state, namely the energy stored in the energy storage, is still sufficient to actuate the actuator. By falling below a second threshold, however, a permanent coupling of the first power transmission element and the second power transmission element can be made.

The object mentioned above is also achieved by a lock set with the features of claim 13. The lock set for a door comprises a mortise lock according to the invention and a mechanical key for actuating the lock cylinder of the mortise lock, the key being associated with an electronic unit with a stored authorization for activating the coupling device.

In this case, the electronic unit can be designed as a transponder. The transponder can be detachably attached to the key in the form of a key fob. It is also conceivable that the electronics unit is firmly connected to the key, for example with the key of the key.

The key can communicate on a capacitive, inductive or radio-operated data transmission with the control device, in particular with a transmitting / receiving unit of the control device.

For further embodiment of the lock set can be explained in connection with the mortise lock measures.

The invention will be explained in more detail below with reference to FIGS.

Figur 1

eine schematische Ansicht eines erfindungsgemäßen Einsteckschlosses mit nicht angesteuerter Kupplungseinrichtung;

Figur 2

eine schematische Ansicht des Einsteckschlosses aus Figur 1 bei Betätigung durch einen über eine Zutrittsberechtigung verfügenden Schlüssel und

Figur 3

eine schematische Ansicht des Einsteckschlosses aus Figur 1 bei Betätigung mit einem nicht berechtigten Schlüssel.

Show it:

FIG. 1

a schematic view of a mortise lock according to the invention with not controlled coupling device;

FIG. 2

a schematic view of the mortise lock FIG. 1 when actuated by a key with an access authorization and

FIG. 3

a schematic view of the mortise lock FIG. 1 when operated with an unauthorized key.

FIG. 1 shows a mortise lock 10 for a door (not shown). The mortise lock 10 has a lock housing 12 with a forend attached thereto. On the lock housing 12, a lock cylinder 14 is arranged and attached. On the lock housing 12, a locking element 16 is further guided, which between an ejected position 18 (see FIG. 1 ) and a retracted position 20 (see FIG. 2 ) is displaceable. The locking element 16 is referred to below as a latch bolt 17.

Between lock cylinder 14 and latch bolt 17, a power transmission device 22 for pulling the latch bolt 17 by means of the lock cylinder 14 is arranged. The lock cylinder 14 has a cam 24.

The power transmission device 22 is associated with a coupling device 26. This is used in legitimate access to produce a power transmission between lock cylinder 14 and latch bolt 17th

The power transmission device 22 has a first power transmission element 28 and a second power transmission element 30. The first power transmission element 28 is guided on the lock housing 12 and engageable with the lock bit 24 of the lock cylinder 14. The first force transmission element 28 is a pressure piece 32, namely an alternating pressure piece 34. The term alternating pressure piece is used below for the first force transmission element 28.

The second power transmission element 30 is pivotally mounted on the lock housing 12 and with the latch bolt 17 in engagement. The second power transmission element 30 is pivotally mounted on the lock housing 12 by means of a nut 36. In that regard, it is the second Power transmission element 30 acting as a change arm 38 nut center part 40th

The alternating pressure piece 34 and the nut center part 40 can not be directly brought into contact with each other even when the alternating pressure piece 34 is actuated, but instead require the coupling device 26. This is arranged in the region of a gap 42 between the alternating pressure piece 34 and the nut center portion 40.

The coupling device 26 has a coupling element 44, which is displaceable into the intermediate space 42, so that upon actuation of the alternating pressure piece 34 by means of the locking bit 24, alternating pressure piece 34 and nut center part 40 come into contact by means of the coupling element 44. The coupling element 44 can be actuated via an actuator 46. The actuator 46 may receive the coupling element 44 from a disengaged position 48 (see FIG FIG. 1 ) into a coupled position 50 (see FIG. 2 ) relocate.

The coupling device 26 has a return device 47 (shown only schematically). When the actuator 46 is inactive, this allows a displacement or retraction of the coupling element 44 into the coupled-out position 48. The return device 47 can be designed as a return spring 49. This allows retrieval or displacement of the coupling member 44 in the disengaged position 48, without the assistance or assistance by the actuator 46 is required. The return spring 49 may at one end to the coupling element 44 and the other end fixed to the housing, for example, on the lock housing 12 or on the actuator 46, be attached.

FIG. 1 shows a closed state of the mortise lock 10 and the mortise lock 10 receiving door (not shown). The nut center portion 40 is in contact with a stopper 54 formed on the catch 16 via an arm portion 52. The trap 16 is in the extended position 18.

For detecting an access authorization, a control device 56 is provided. This is able to recognize an access authorization and to control the actuator 46 in the presence of access authorization. This can then be moved to a coupled position 50. The control device is arranged in the lock housing 12.

For communication, the control device 56 has a transmitting / receiving unit 58. This is able to communicate with a transponder containing an access authorization via a communication element 60. This can be done by means of communication element 60 by inductive, capacitive or by means of wireless data transmission.

For network-independent power supply, an energy storage 62 is provided. This allows components of the mortise lock 10, for example control device 56, coupling device 26 and / or actuator 46, to be supplied with energy. The energy storage 62 is arranged in the lock housing 12. This allows a simple installation of the mortise lock 10 in doors, as a power supply independent of a power supply is possible.

FIG. 2 shows the mortise 10 off FIG. 1 in with a key inserted in the lock cylinder 14 actuated state, wherein the key has an access authorization.

Thus, the key (not shown) has an electronic unit, namely a transponder, with a stored access authorization. The electronics unit or the transponder can communicate with the controller 56. If there is an access authorization, the actuator 46 is actuated and shifted to a coupled position 50. The communication takes place via the transmitting / receiving unit 58 of the control device 56, namely via the communication element 60.

In FIG. 2 For example, the lock cylinder 14 and the lock bit 24 were rotated by the key, so that the alternating pressure piece 34 is displaced in the direction of the latch bolt 17. Since the key has an electronic access authorization, the coupling device 26 is driven accordingly and the coupling element 44 is displaced into a coupled position. Via the coupling element 44, which may have a pin or mandrel, the alternating pressure piece 34 comes into contact with the nut center part 40, so that the nut center part 40 is pivoted. The return spring 49 is in the tensioned state. About the arm portion 52 of the nut central portion 40 of the latch bolt 17 is retracted, in a retracted position 20th

Starting from the coupled position 50, the coupling element 44 by means of the return spring 49 in the disengaged position 48 (see Fig.1 ) be relocated or withdrawn. This ensures that after deduction of the mechanical key from the lock cylinder 14, after which the alternating pressure piece 34 in its starting position (see Fig. 1 ), the coupling element 44 moves without the aid of the actuator 46 in the disengaged position 48. The control device 56 only has to determine the state "unlocked" in which the latch bolt 16 has been pulled in towards the door opening. Thereafter, the actuator 46 can be inactivated and moved to one of the decoupled position 48 corresponding position. This leads to energy savings.

FIG. 3 shows the mortise 10 off FIG. 1 when operated with a key that does not have an electronic access authorization. Thus, the lock cylinder 14 and the cam 24 can be rotated over the unauthorized key, so that the alternating pressure piece 34 is displaced in the direction of the latch bolt 17.

However, the coupling element 44 is in the disengaged position 48, since the control device 56 has detected no access authorization. Despite actuation of the alternating pressure piece 34, no pivoting of the nut center part 40 takes place.

Alternating pressure piece 34 and nut center part 40 can be arranged offset to one another orthogonally to the plane of the drawing, so that they can be brought into contact only by the coupling element 44, for example its pin or shaft. Thus, no operation of the latch bolt 17, so that it remains in the ejected position 18. A lock opening is thus not possible, namely in the absence of an electronic access authorization.

Claims (13)

1. Mortise lock (10) for a door, comprising a lock housing (12), a locking cylinder (14) arranged on the lock housing (12), a latching element (16) that is guided on the lock housing (12) and can be moved between an extended position (18) and a retracted position (20), and a device (22) for transmitting force between a locking bit (24) of the locking cylinder (14) and the latching element (16) in order to retract the latching element (16) by means of the locking cylinder (14), the force transmission device (22) having a first force transmission element (28) and a second force transmission element (30), characterized in that the force transmission device (22) is associated with a controllable coupling device (26) in order to allow force to be transmitted between the locking cylinder (14) and latching element (16) when access is authorized, and in that the coupling device (26) acts between the first force transmission element (28) and the second force transmission element (30).
2. Mortise lock (10) according to claim 1, characterized in that the first force transmission element (22) is a thrust piece (32), in particular an alternating thrust piece (34), which is guided on the lock housing (12) and can be brought into engagement with the locking bit (24) of the locking cylinder (14).
3. Mortise lock (10) according to claim 1 or claim 2, characterized in that the second force transmission element (30) is pivotally fastened to the lock housing (12) and is engaged with the latch (16).
4. Mortise lock (10) according to any of the preceding claims, characterized in that the second force transmission element (30) is a changer arm (38), preferably a nut middle part (40).
5. Mortise lock (10) according to any of the preceding claims, characterized in that the coupling device (26) has a coupling element (44) which can be moved in order to allow force to be transmitted, such that the first force transmission element (28) and the second force transmission element (30) can be coupled by means of the coupling element (44) when access is authorized.
6. Mortise lock (10) according to any of the preceding claims, characterized in that the coupling device (26) has an actuator (46), which is preferably driven by an electric motor or driven electromagnetically, in order to actuate the coupling element (44).
7. Mortise lock (10) according to any of the preceding claims, characterized in that a nut (36) that can be actuated by means of a door handle is pivotally fastened to the lock housing (12) and in that the nut (36) is associated with a further controllable coupling element in order to allow force to be transmitted between the nut (36) and latching element (16).
8. Mortise lock (10) according to any of the preceding claims, characterized in that a control device (56) is provided for controlling the actuator.
9. Mortise lock (10) according to claim 8, characterized in that the control device (56) has a transmitter/receiver unit (58) for communicating with a transponder that has access authorization.
10. Mortise lock (10) according to claim 9, characterized in that the transmitter/receiver unit (58) has a communication element (60) for inductive data transmission, capacitive data transmission or data transmission that operates by means of radio.
11. Mortise lock (10) according to any of the preceding claims, characterized in that an energy store (62) that is preferably arranged in the lock housing (12) is provided for supplying energy to lock components, in particular the actuator (46), control device (56), transmitter/receiver unit (58) and/or communication element (60).
12. Mortise lock (10) according to any of claims 8 to 11, characterized in that the control device (56) has a measuring element for detecting when the voltage of the energy store has fallen below threshold values.
13. Lock set for a door, comprising a mortise lock (10) according to any of the preceding claims and a mechanical key for actuating the locking cylinder (14) of the mortise lock (10), the key being associated with an electronic unit having stored authorization in order to control the coupling device (26).

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