Trap lock

Abstract

The invention relates to a latch lock (10) comprising a lock housing (12), a lock faceplate (16), a main latch (20), a locking device (26) configured to prevent the main latch (20) from being moved into the retracted position in a locked position, and a control latch (28) for controlling the locking device (26), wherein the control latch (28) has an actuating section (29) arranged on the main latch (20) such that, when the main latch (20) is extended, the actuating section (29) together with a latch head (25) of the main latch (20) projects through a latch opening (21) in the lock faceplate (16).

Description

The invention relates to a latch lock with features of the preamble of claim 1. The invention further relates to a door arrangement with features of the dependent claim. Latch locks of the type mentioned above are known from the prior art, e.g., from EP 3 569 800 A1, which describes such a lock and refers to it as a deadbolt lock. This lock has a retractable main latch and a control latch assembly with a control latch carrier and a control latch attached to it. The control latch is located on the lock faceplate below the main latch, and in a locked position, it prevents the main latch from being retracted. This prevents unauthorized manipulation of the lock by pushing back the main latch (the "credit card trick"). This contributes to improved security. However, such a lock requires a correspondingly adapted lock faceplate and, if necessary, a custom-made strike plate. This increases the effort involved, as appropriately adapted lock faceplates and strike plates must be kept in stock and installed as needed.Retrofitting existing building closures or existing door arrangements becomes more difficult. The invention is based on the objective of reducing the manufacturing effort and improving the flexibility in assembly of latch locks using simple design means. The invention solves this problem by means of a latch lock with the features of claim 1. A latch lock, or deadbolt lock, consists of a lock case and a lock faceplate. The lock can be designed as a mortise lock. The latch lock has a main latch which is slidably guided on or in the lock housing and can be moved or shifted relative to the lock faceplate between an extended position (latch extended) and a retracted position (latch retracted). The latch lock also features a locking mechanism (main latch lock) designed to prevent the (at least largely) extended main latch from being moved back into the retracted position ("pushing back") when in a locked position. The latch lock also includes a control latch for operating the locking mechanism. The control trap has an actuating section which is arranged on the main trap in such a way that, when the main trap is extended (main trap in extended position), the actuating section protrudes through a trap opening in the lock faceplate together with a trap head of the main trap. The proposed design provides a locking latch function when the main latch is extended, particularly when the main latch is retracted into a strike plate. This allows a building closure or door assembly to be secured against tampering attempts (such as "pushing back" with a tool or credit card) even when unlocked (bolt not engaged). The control latch, or its actuating mechanism, is integrated, or at least partially integrated, into the main latch. This allows the use of a conventional lock faceplate with a standard latch opening. Furthermore, a conventional strike plate can be used. Specifically, the lock faceplate can have a (standard and / or shared) latch opening for both the main latch and the control latch, or its actuating mechanism.The lock faceplate is in particular free of one or more openings (separate from the trap opening) for the tax trap. In a preferred embodiment, a recess can be formed in the trap head in which the actuating section of the control trap is slidably guided. This contributes to a space-saving design with a structurally simple and robust guide for the actuating section. The actuating section can be accommodated in the recess, in particular in such a way that it does not project beyond the side surface of the trap head in which the recess is formed (flat design and, if necessary, an overall rectangular cross-section of the trap head). Advantageously, the control latch can have a contact section at the distal end of the actuating section (the end furthest from the lock housing) that extends transversely to the actuating section, away from the latch head. This creates a defined contact point for contact with a (frame-side) strike plate. The contact section is designed and / or intended for contacting a frame-side strike plate. The contact section can be tongue-shaped (contact tongue). Viewed from above, the contact section can extend partially outside the clear cross-section of the latch opening in the lock faceplate, for example, by 30% to 90%, preferably 40% to 60%. It is also conceivable that the contact section extends predominantly, i.e., by more than 50%, outside the clear cross-section of the latch opening in the lock faceplate. Advantageously, the control latch can have a shoulder at the proximal end of the actuating section (the end facing the lock housing) projecting from the actuating section. This shoulder can abut the end of the latch head facing the lock housing (the rear end of the latch head). The shoulder limits the extension of the control latch relative to the main latch. If the shoulder abuts the rear end of the latch head, further extension of the control latch relative to the main latch is prevented. Furthermore, when the main latch retracts, the control latch can also be retracted (the rear end of the latch head abuts the shoulder of the control latch and pulls the control latch along). Specifically, the control latch can have a base section with an enlarged cross-section relative to the actuating section. The shoulder is located at the transition between the base section and the actuating section.The control latch can be guided over the base section on the lock housing, e.g. on a base plate of the lock housing (e.g. slots in the base plate and pins engaging in them on the base section of the control latch or vice versa). In a preferred embodiment, the control latch can be pre-tensioned into an extended position relative to the lock faceplate by means of a spring element. This makes the control latch ready to scan a (frame-side) strike plate. The spring element can be designed as a compression spring, in particular as a coil spring. A spring receptacle can be attached to the lock housing, in particular to the base plate of the lock housing. The spring receptacle can have a body, in particular a monolithic one, and a receiving channel formed therein for receiving one end of the spring element, e.g., a bore. A guide pin can be attached to the proximal end of the control latch (the end facing the lock housing), which guides the spring element, in particular by penetrating the eye of the coil spring. The guide pin and the receiving channel are positioned relative to each other such that the guide pin and the receiving channel are aligned.As already mentioned, the control latch has a base section at the proximal end of the actuating section (the end facing the lock housing) on ​​which a control lug projects towards the locking mechanism. A control recess is formed on the locking mechanism, with which the control lug engages when the locking mechanism is in the locked position. In other words, the locking mechanism and control latch are coordinated such that the control lug engages with the control recess when the locking mechanism is in the locked position. Through the interaction of the control lug and the control recess, the locking mechanism can be moved into a locked or a released position. When the control lug and the control recess are engaged, the locking mechanism is in the locked position. The locking mechanism is specifically designed to engage behind the latch head of the main latch, thus preventing the main latch from being inserted.If the control lug and the control recess are disengaged, the locking mechanism is in the release position. The locking mechanism then does not engage the trap head, or only engages it to the extent that the main trap can be inserted or is not blocked. Advantageously, the locking device can have a pivot lever mounted on the lock housing, which is biased into the locked position (towards the control latch) by means of a further spring element. This contributes to a structurally simple and robust design. The pivot lever can be pivotally mounted on the lock housing at its proximal end (away from the main latch) by means of a pin, in particular on a base plate of the lock housing. The further spring element can be a compression spring, which can be designed in particular as a coil spring. The pivot lever can have a recess for receiving the further spring element, in particular on an upper surface of the pivot lever (applied by the control latch). A pin can be formed in the recess to secure the further spring element.The end of the spring element facing away from the pivot lever can rest against a retaining section or a wall of the lock housing. Specifically, the pivot lever (at its distal end) can have a head section facing the trap head, which engages behind the trap head in the locked position. This contributes to a structurally simple and robust locking mechanism against the main trap being pushed back. The control recess for the control lug, as described above, can be formed in the head section. The cross-section of the head section can taper towards its distal end (free end). When the locking device is in the locked position, the pivot lever's head section engages behind the trap head of the main trap, thus preventing the main trap from being pushed back (moved into the retracted position). Advantageously, a spindle can be rotatably mounted in the lock housing, the spindle having a spindle arm. The pivot lever has an actuating arm facing the spindle, and the spindle arm and the actuating arm are coordinated such that, when the locking device is in the locked position, actuating the spindle pivots the lever, thus releasing the locking device. The pivot lever, or its head section, then no longer engages the latch head, allowing the main latch to retract. Specifically, the main latch can have a latch tail which, particularly at an end facing away from the latch head, has a projection that can be actuated via the spindle arm. In particular, the projection and the spindle arm can be coordinated such that when the spindle is actuated (in the opening direction), the main latch is retracted.is moved into the retracted position. The nut arm can thus interact with the pivot lever (actuating arm) and with the main latch (projection on the latch tail), whereby when the push nut is actuated, the locking position is first released and then the main latch is retracted. Advantageously, the latch lock can have a changeover lever, actuated by a profile cylinder, which is arranged in the lock housing. The changeover lever has an actuating section at its end facing the locking mechanism, with the pivot lever having a guide contour. The actuating section and the guide contour are coordinated such that, when the locking mechanism is in the locked position, actuating the changeover lever (by means of the profile cylinder) pivots the pivot lever, thus releasing the locking mechanism. The pivot lever, or rather its head section, then no longer engages the latch head, allowing the main latch to retract. Specifically, the main latch can have two raised sections on its latch tail, between which the changeover lever passes.The raised sections and the changeover mechanism can be coordinated such that when the changeover mechanism is actuated (by means of a profile cylinder), the main latch is retracted, i.e., moved into the retracted position. The changeover mechanism can thus interact with the pivot lever (guide contour) and with the main latch (raised sections on the latch tail), whereby when the changeover mechanism is actuated, the locking position is first released and then the main latch is retracted. Independently of this, the changeover mechanism can have a rotary lever and a changeover lever. The rotary lever can be actuated directly by the profile cylinder. The changeover lever is articulated to the rotary lever and passes between the raised sections on the latch tail. The lock housing of the latch lock may have a receiving opening for a profile cylinder. The latch lock may have a profile cylinder that is inserted into the receiving opening in the lock housing. The latch lock may have a bolt that can be operated by the profile cylinder and moved into a locked position (bolt extended) and a closed position (bolt retracted). The aforementioned problem is also solved by a door arrangement with the features of the subordinate claim. The door assembly comprises a (fixed) frame and a leaf that pivots on the frame and can be pivoted between a closed and an open position relative to the frame. The frame has a strike plate. The leaf has a latch lock with one or more of the aspects described above. Specifically, the latch lock can be located on the end face of the sash opposite the hinges (mortise lock). The strike plate can be mounted on the end face of the frame in such a way that, when the sash is closed, the lock faceplate and the strike plate face each other. The strike plate has a latch receptacle opening that (when the sash is closed) aligns with the main latch of the latch lock. Regarding the advantages achievable with this door arrangement, reference is made to the relevant explanations concerning the latch lock. The measures described in connection with the latch lock and / or those discussed below can be used to further customize the door arrangement. The invention is explained in more detail below with reference to the figures, where identical or functionally identical elements are provided with identical reference numerals, possibly only once. Figures 1a-c show an embodiment of a latch lock with a locking device in the release position (wing in the open position) in a front view (Fig. 1a), an end view of the lock faceplate (Fig. 1b), and a rear view (Fig. 1c); Figures 2a-c show the latch lock from Figures 1a-c with a locking device in the locked position (wing in the closed position) in a front view (Fig. 2a), an end view of the lock faceplate (Fig. 2b), and a rear view (Fig. 2c). Figs. 3a-c show the latch lock from Figs. 1a-c when accessed by operating the handle (door handle) in a front view (Fig. 3a), an end view of the lock faceplate (Fig. 3b) and a rear view (Fig. 3c); Figs. 4a-c show the latch lock from Figs.1a-c during access by actuating the changeover (profile cylinder) in a front view (Fig. 4a), an end view of the lock faceplate (Fig. 4b) and a rear view (Fig. 4c); Fig. 5 the pivot lever of the locking device of the latch lock from Fig. 1a-c in several views; Fig. 6 the control latch of the latch lock from Fig. 1a-c in several views; and Fig. 7 the spring receptacle of the latch lock from Fig. 1a-c in several views. Fig. 2a shows a door arrangement, which is generally designated by the reference numeral 100. The door assembly 100 has a fixed frame 102, which is shown here only schematically. Furthermore, the door assembly 100 has a leaf 104 (also shown here only schematically), which is pivotally mounted on the frame 102 and can pivot relative to the frame 102 between a closed and an open position. A strike plate 106 is provided on the frame 102. A latch lock 10 is provided on the leaf 104. The latch lock 10 is installed on the end face of the sash 104 on the hinge side 108 of the sash (mortise lock). The strike plate 106 is installed on the end face of the frame 102 such that, when the sash 104 is in the closed position, the lock faceplate 16 and the strike plate 106 face each other. A latch receptacle 110 is formed in the strike plate 106, which (when the sash is in the closed position) aligns with the main latch 20 of the latch lock 10. Optionally, the strike plate 106 can have a bolt receptacle 112, which (when the sash is in the closed position) aligns with the bolt 22 of the latch lock 10. The construction and operation of the latch lock 10 are explained below with reference to Figs. 1a to 7. The latch lock 10 has a lock housing 12, which consists of a base plate 14 and a cover plate, the latter removed for illustrative purposes and therefore not shown in the figures. The latch lock 10 also has a lock faceplate 16, which is attached to the base plate 14, for example, by means of screws 15. The latch lock 10 has a rotatable spindle 17 mounted in the lock housing for operation, which requires force against the spring 18 (pivot spring spindle). The lock housing 12 has a receiving opening 19 for a profile cylinder (not shown). The latch lock 10 also has a main latch 20 that can pass through a latch opening 21 in the lock faceplate 16. Optionally, the latch lock 10 can have a bolt 22 that can pass through a bolt opening 23 in the lock faceplate 16. The main latch 20 is slidably guided on the lock housing 12 and can be displaced relative to the lock faceplate 16 between an extended position (see Fig. 1a) and a retracted position. In this example, the main latch 20 is pre-tensioned into the extended position by means of a spring 24 (main latch torsion spring). The latch lock 10 also has a locking device 26 for the main latch 20. The locking device 26 is designed to prevent the extended main latch 20 from being moved back into the retracted position ("pushing back") in a locked position (see Fig. 2a and Fig. 2c). Furthermore, the locking device 26 is designed to release the main latch 20 from being moved back into the retracted position in a released position (see Fig. 1a and Fig. 1c). The latch lock 10 has a control latch 28 for controlling the locking device 26. The control latch 28 has an actuating section 29, which is arranged on the main latch 20 such that, when the main latch 20 is extended, the actuating section 29, together with a latch head 25 of the main latch 20, projects through a latch opening 21 in the lock faceplate 16 (see Figs. 1a to 1c). In other words, the control latch 28, or rather its actuating section 29, is at least partially integrated into the main latch 20. This allows the use of a conventional lock faceplate 16 and a conventional strike plate 106, as explained above. In the present case, a recess 31 is formed in the trap head 25, in which the actuating section 29 of the control trap 28 is slidably guided. The actuating section 29 is received in the recess 31 in such a way that it does not project beyond the side surface 32 of the trap head 25 in which the recess 31 is formed. The control latch 28 has a contact section 34 at the distal end of the actuating section 29 (end facing away from the lock housing 12), which extends transversely to the actuating section 29 away from the latch head 25 (see, for example, Fig. 1b and Fig. 1c). The contact section 34 forms a defined contact point for contact with the (frame-side) strike plate 106. In this example, the contact section 34 is tongue-shaped and extends predominantly, i.e., by more than 50%, outside the clear cross-section of the latch opening 21 in the lock faceplate 16. The control latch 28 has a projection 35 at the proximal end of the actuating section 29 (the end facing the lock housing 12), which extends relative to the actuating section 29 and can abut the end of the latch head 25 facing the lock housing 12 (rear end of the latch head 25). The projection 35 limits the extension of the control latch 28 relative to the main latch 20 (see also Fig. 2c and Fig. 6). In this example, the control latch 28 has a base section 36 whose cross-section is enlarged relative to the actuating section 29 (see, for example, Fig. 2c and Fig. 6). The shoulder 35 is located at the transition between the base section 36 and the actuating section 29. In this example, the control latch 28 is guided over the base section 29 on the lock housing 12, specifically on the base plate 14 of the lock housing (slots 37 in the base plate 14 and pins 38 engaging therein on the base section 36 of the control latch 28). The control latch 28 is pre-tensioned into an extended position relative to the lock faceplate 16 by means of a spring element 39 (see Fig. 1a). The spring element 39 is designed as a compression spring in the form of a helical spring. A spring receptacle 40 is attached to the base plate 14 of the lock housing 12 (see also Fig. 7). The spring receptacle 40 has a monolithic body in this example and a receiving channel 41 formed therein for receiving one end of the spring element 39, e.g., a bore. A guide pin 42 is attached to the proximal end of the control latch 28, which guides the spring element 39 by penetrating the eye of the spring element 39 (helical spring; see also Fig. 6). A control lug 44 is formed on the base section 36 of the control trap 28, which (in the installed state) projects towards the locking device 26 (see Fig. 1c). A control recess 46 is formed on the locking device 26, with which the control lug 44 can engage in order to bring the locking device 26 into the locked position (see Fig. 2c). When the control lug 44 and the control recess 46 are engaged, the locking device 26 is in the locked position (see Figs. 2a to 2c). The locking device 26 is designed such that it engages behind the trap head 25 of the main trap 20, thus preventing the main trap 20 from being inserted. If the control lug 44 and the control recess 46 are disengaged, the locking device 26 is in the release position (see Figs. 1a to 1c). The locking device 26 then does not engage behind the trap head 25 and / or only engages to the extent that insertion of the main trap 20 is possible or is not blocked. In this example, the locking device 26 has a pivot lever 50 pivotally mounted on the lock housing 12, which is biased into the locking position (towards the control latch 28) by means of a further spring element 51 (see, for example, Fig. 1a). In this example, the pivot lever 50 is pivotally mounted at its proximal end (away from the main latch 20) on the base plate 14 of the lock housing 12 by means of a pin 52. The further spring element 51 is designed as a compression spring in the form of a coil spring. The pivot lever 50 has a recess 53 for receiving the further spring element 51, in this example on a top surface 54 of the pivot lever 50 (applied by the control latch 28) (see Fig. 5). A pin 55 is formed in the recess 53 to secure the further spring element 51.The end of the spring element 51 facing away from the pivot lever 50 can rest against a retaining section or a wall of the lock housing 12 (not shown in detail). The pivot lever 50 has (at its distal end) a head section 56 which, in the installed state, faces the trap head 25 and, in the locked position, engages behind the trap head 25 (see Figs. 2a to 2c). The control recess 46 for the control lug 44, described above, is formed in the head section 56. In this example, the cross-section of the head section 56 tapers towards the distal end (free end) (decreasing height; see also Fig. 5). As already indicated above, a spindle 17 is rotatably mounted in the lock housing 12. The spindle 17 has a spindle arm 60. The pivot lever 50 has an actuating arm 58 which (in the installed state) faces the spindle 17. The spindle arm 60 and the actuating arm 58 are coordinated such that, when the locking device 26 is in the locked position, actuating the spindle 17 pivots the pivot lever 50, thus releasing the locking device 26 (see Figs. 3a to 3c). The pivot lever 50, or rather its head section 56, then no longer engages the latch head 25, allowing the main latch 20 to be retracted. In this case, the main latch 20 has a latch tail 62 which, at an end facing away from the latch head 25, has a projection 64 that can be actuated via the nut arm 60. In particular, the projection 64 and the nut arm 60 are coordinated such that when the push button 17 is actuated (in the opening direction), the main latch 20 is retracted or moved into the retracted position (see Figs. 3a to 3c). The nut arm 60 thus interacts with the pivot lever 50 and with the main latch 20, whereby when the push button 17 is actuated, the locking position is first released and then the main latch 20 is retracted. The latch lock 10 also has a changeover 66, which can be actuated by a profile cylinder (not shown) and is arranged in the lock housing 12 (see Figs. 4a to 4c). The changeover 66 has an actuating section 68 at its end facing the locking device 26, wherein the pivot lever 50 has a guide contour 59. The actuating section 68 and the guide contour 59 are coordinated such that, when the locking device 26 is in the locked position, actuation of the changeover 66 (by means of a profile cylinder) pivots the pivot lever 50, thus releasing the locking device 26 from its locked position (see Figs. 4a to 4c). The pivot lever 50, or rather its head section 56, then no longer engages the latch head 25, allowing the main latch 20 to be retracted. In this example, the main latch 20 has two raised sections 70, 72 on its latch tail 62, between which the changeover mechanism 66 passes. The raised sections 70, 72 and the changeover mechanism 66 are coordinated such that when the changeover mechanism 66 is actuated (by means of a profile cylinder), the main latch 20 is retracted, i.e., moved into the retracted position. The changeover mechanism 66 thus interacts with the pivot lever 50 (guide contour) and with the main latch 20 (raised sections on the latch tail), whereby when the changeover mechanism 66 is actuated, the locking position is first released and then the main latch 20 is retracted. The device comprises a rotary lever 74 and a changeover lever 76. The rotary lever 74 can be actuated directly by the profile cylinder. The changeover lever 76 is pivotally coupled to the rotary lever 74 and passes between the raised sections 70 and 72 on the latch tail 62. QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature EP 3 569 800 A1

[0002]

Claims

A latch lock (10) comprising a lock housing (12), a lock faceplate (16), a main latch (20) which is slidably guided on the lock housing (12) and can be displaced relative to the lock faceplate (16) between an extended position and a retracted position, a locking device (26) which is configured to prevent the main latch (20) from being displaced into the retracted position in a locked position, and a control latch (28) for controlling the locking device (26), characterized in that the control latch (28) has an actuating section (29) which is arranged on the main latch (20) such that, when the main latch (20) is extended, the actuating section (29) together with a latch head (25) of the main latch (20) projects through a latch opening (21) in the lock faceplate (16). Latch lock (10) according to claim 1, characterized in that a recess (31) is formed in the latch head (25) in which the actuating section (29) of the control latch (28) is slidably guided. Latch lock (10) according to claim 2, characterized in that the control latch (28) has a contact section (34) at the distal end of the actuating section (29) which extends transversely to the actuating section (29) away from the latch head (25). Latch lock (10) according to one of the preceding claims, characterized in that the control latch (28) has a projection (35) at the proximal end of the actuating section (29) which can abut the end of the latch head (25) facing the lock housing (12). Latch lock (10) according to one of the preceding claims, characterized in that the control latch (28) is pre-tensioned by means of a spring element (39) into a position extended with respect to the lock faceplate (16). A latch lock (10) according to one of the preceding claims, characterized in that the control latch (28) has a base section (36) at the proximal end of the actuating section (29) on which a control lug (44) projects towards the locking device (26), wherein a control recess (46) is formed on the locking device (26) with which the control lug (44) engages in the locking position of the locking device (26). Latch lock (10) according to one of the preceding claims, characterized in that the locking device (26) has a pivot lever (50) pivotably mounted on the lock housing (12), which is biased into the locking position by means of a further spring element (54). Latch lock (10) according to the preceding claim, characterized in that the pivot lever (50) has a head section (56) facing the latch head (25), which engages the latch head (25) in the locking position. A latch lock (10) according to one of the two preceding claims, characterized in that a push-button nut (17) is rotatably mounted in the lock housing (12), the push-button nut having a nut arm (60), wherein the pivot lever (50) has an actuating arm (58) facing the push-button nut (17), wherein the nut arm (60) and the actuating arm (58) are coordinated such that, when the locking device (26) is in the locked position, the pivot lever (50) is pivoted by actuating the push-button nut (17), so that the locked position of the locking device (26) is released. A latch lock (10) according to one of the three preceding claims, characterized in that a changeover (66) actuated by a profile cylinder is arranged in the lock housing (12), wherein the changeover (66) has an actuating section (68) at its end facing the locking device (26), wherein the pivot lever (50) has a guide contour (59), wherein the actuating section (68) and the guide contour (59) are coordinated such that, when the locking device (26) is in the locked position, the pivot lever (50) is pivoted by actuating the changeover (66), so that the locked position of the locking device (26) is released. Door arrangement (100) with a frame (102) and a leaf (104) pivotably mounted on the frame (102) and pivotable between a closed position and an open position relative to the frame (102), wherein the frame (102) has a strike plate (106) and the leaf (104) has a latch lock (10) according to one of the preceding claims.

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