RETROFITTABLE ELECTRIC LOCKING UNIT

Description

[0001] The invention relates to a retrofittable electric locking unit for a window or door, comprising a lock for attachment to a sash of the window or door which can be pivoted between a closed position and an open position, and a counterpart for attachment to a frame or another sash of the window or door.

[0002] Locking units are generally known, for example from the publications WO 2011 / 065633 A1 or EP 3 098 373 A1.

[0003] A locking unit is used, for example, as an additional window or door lock to increase the security of a building through retrofitting. This better protects the building against potential break-in attempts. The locking unit comprises two interlocking elements: the lock and its corresponding counterpart.

[0004] Generally, the lock can have a bolt that can be moved between an unlocked and a locked position, allowing the lock to be selectively secured to the counterpart, which can be in the form of a bolt receptacle or a so-called strike plate. The lock and the counterpart can be mounted opposite each other on the sash or frame of the window or door.

[0005] To ensure the bolt reliably secures the lock to the counterpart while also allowing for optional unlocking, it may be necessary to move the bolt a relatively large distance when shifting from the unlocked to the locked position. This is necessary to bridge the gap between the lock and bolt receptacle, or between the sash and frame. In cases of a large bolt travel, the locking unit as a whole has a correspondingly large and space-consuming design.

[0006] For convenient operation, the locking unit can be equipped with an electric motor to reposition the bolt, allowing it to be easily moved using a button on the locking unit or via remote control. However, using an electric motor to reposition the bolt also increases the size of the (electromechanical) locking unit.

[0007] However, for a visually appealing and especially discreet appearance of the locking unit, it is desirable if the locking unit has the most compact design possible.

[0008] One objective of the invention is to create a retrofittable electrical locking unit which is characterized by a simple and compact design.

[0009] The problem is solved by a retrofittable electrical locking unit with the features of claim 1.

[0010] The locking unit according to the invention for a window or door comprises a lock for attachment to a sash of the window or door which can be pivoted between a closed position and an open position and a counterpart for attachment to a frame or another sash of the window or door.

[0011] The counterpart has at least one bolt that is oriented perpendicular to a mounting plane of the counterpart and that has a shank and a head that is wider than the shank. The mounting plane of the counterpart can, in particular, be aligned parallel to the plane of extension of the frame or the further sash when the locking unit is fastened.

[0012] The lock has a base plate that defines a base plane and includes at least one opening for the head of the bolt(s). In the locked state, this base plane can be aligned parallel to a plane of the sash passing through it or to the plane of extension of the sash. Furthermore, the lock includes a bolt that is movable relative to the base plate between an unlocked position and a locked position. The bolt has at least one elongated hole with a passage for the head of the respective bolt and an interlocking section extending from the passage along the direction of movement of the bolt (i.e., in or against the direction of movement).The interlocking section, perpendicular to the displacement direction of the bolt, has a smaller clear width than the passage section of the elongated hole and than the head of the bolt, in order to interlock the head of the bolt in the closed position of the sash and in the locked position of the bolt.

[0013] Furthermore, the lock includes a drive unit for relocating the bolt, wherein the drive unit has an electric motor with a rotary axis that is aligned parallel to the base plane and at least substantially perpendicular to the relocation direction of the bolt.

[0014] The invention is based on the general idea that a bolt of a locking unit only needs to travel a short distance when shifted between the unlocked and locked positions if the bolt only needs to be shifted far enough to securely engage the head of a bolt protruding from a counterpart in the locked position. This means that the bolt of the locking unit only needs to be shifted by approximately the diameter of the bolt head to securely engage it and lock the locking unit.

[0015] Due to the short travel distance of the bolt between the unlocking position and the locking position, the advantage arises that the locking unit, especially in the direction of the bolt's displacement, can be designed to be particularly compact.

[0016] Furthermore, for a compact and flat design of the locking unit, especially in the direction perpendicular to the base plane, it is advantageous if the axis of rotation of the electric motor is aligned parallel to the base plate of the lock, thus allowing the electric motor to be housed in the lock or in a lock housing in a space-saving manner. The locking unit can be made particularly compact if the axis of rotation of the electric motor is aligned at least substantially perpendicular to the direction of movement of the bolt.

[0017] It should be noted at this point that the aforementioned ground plane can pass through the base plate, whereby the base plate and the ground plane can coincide, so that the base plate extends at least partially into the ground plane.

[0018] The base plate serves to protect the interior of the locking unit from external influences, such as an attempted break-in by an unauthorized person, thus enabling a particularly secure installation of the locking unit in a simple manner. In particular, the base plate can serve as protection against forced entry onto the locking unit from the exterior of the building, especially if such an attack occurs through a gap between the sash and frame.

[0019] Furthermore, if someone attempts to force open the closed sash, the bolt in the locked position can brace itself against the base plate. If, during a (forceful) movement of the sash from the closed to the open position, the bolt head is pressed against the bolt in the locked position, the bolt can become jammed between the bolt head and the base plate. This jamming effect can make it more difficult to manipulate the bolt from the locked to the unlocked position.

[0020] In the closed position of the sash, the (at least one) bolt attached to the frame protrudes through the respective opening in the base plate. For this purpose, the lock may project beyond an edge of the sash when viewed in the direction of the base plate's plane. Specifically, in the closed position of the sash, the opening in the base plate, on the one hand, and the bolt and / or the section of the slot of the bolt in the unlocked position, on the other hand, may be aligned coaxially with respect to a longitudinal axis of the bolt. In the locked position of the bolt, the engagement section of the slot may be aligned with the longitudinal axis of the respective bolt, whereby the engagement section of the slot of the bolt may have a smaller clear width than the opening in the base plate.

[0021] Further embodiments of the invention can be found in the dependent claims, the description and the drawings.

[0022] To protect the components inside the lock particularly effectively, the base plate is preferably made of a particularly resistant material, such as metal.

[0023] In some embodiments, the locking section of the bolt is flat and extends parallel to the base plane of the lock. Due to the flat design of the bolt, it is sufficient if, in the closed position of the sash, the bolt head projects slightly beyond the base plate at a right angle to the base plane, so that the bolt, in its locked position, is positioned between the bolt head and the base plate. Overall, this allows for a particularly flat design of the locking unit at a right angle to the base plane.

[0024] Additionally or alternatively, the bolt or the locking section of the bolt can be arranged above the base plate, i.e., the bolt or the locking section of the bolt is arranged on a side of the base plate facing the interior of the locking unit, whereby the bolt is protected against external influences by the base plate.

[0025] Preferably, the bolt rests on the base plate so that, when shifted between the unlocked and locked positions, the bolt runs along the base plate. The direction of movement of the bolt preferably runs parallel to the base plane of the lock's base plate.

[0026] In some embodiments, the direction of displacement of the bolt, when the locking unit is in the locked position, runs parallel to the edge of the sash to which the locking unit is attached. It is understood that the locking unit is preferably designed to be attached to the edge of the sash of the window or door, or adjacent to the edge. According to an advantageous embodiment, the counterpart has a base body from which the bolt projects. The locking unit is preferably designed such that, in the closed position of the sash, at least a section of the base plate of the lock is arranged above the base body of the counterpart. In other words, the lock, with its base plate, projects at least partially beyond an edge of the sash.

[0027] It is understood that, in a locked state, the bolt of the base body projects at a right angle from a frame plane passing through the frame. In other words, the bolt is aligned at a right angle to the base plane of the lock when the sash is in the closed position.

[0028] In some embodiments, the counterpart may have a cover featuring an extendable telescopic sleeve. The cover is biased towards a home position in which it rests against the underside of the head of the bolt(s). When the sash is closed, the cover can be pushed back against its bias by the base plate of the lock to expose part of the respective shank of the bolt(s). Such a cover thus allows for a closed enclosure of the counterpart when the sash is open, without the bolts protruding significantly from the counterpart. The telescopic sleeve may comprise several nested and mutually displaceable sleeve elements. The telescopic sleeve may be completely closed or may have lateral openings.

[0029] To increase the security of the locking unit, the counterpart can have at least two bolts and the bolt can have two elongated holes, each corresponding to one of the bolts, with the elongated holes arranged adjacent to each other along the direction of movement of the bolt. Furthermore, multiple bolts allow for better guidance of the bolt during its movement between the unlocked and locked positions.

[0030] To further enhance the security of the locking unit and to better protect it against external influences, the base plate can have a collar section angled relative to the base plane on at least one transverse side extending perpendicular to the direction of movement of the bolt and / or on at least one longitudinal side extending along the direction of movement of the bolt. This collar section projects beyond the plane of extension of the locking section of the bolt. Such a collar section can prevent, for example, the use of a tool to laterally penetrate the interior of the lock in order to move the bolt from the locked to the unlocked position. Furthermore, such a collar section can increase the stability of the otherwise essentially flat base plate.

[0031] In some embodiments, the bolt may have a drive section. The drive section may run parallel to the displacement direction of the bolt and be angled with respect to the locking section of the bolt, with the drive unit engaging the drive section of the bolt to drive the bolt into movement along the displacement direction. Preferably, the drive section is angled at least approximately at a right angle to the locking section.

[0032] Furthermore, the bolt can have a guide section that runs parallel to the bolt's direction of movement and is designed to guide the bolt within the lock. In some embodiments, the guide section can be angled at least approximately at a right angle to the drive section. Preferably, the guide section has at least one guide slot aligned parallel to the bolt's direction of movement, into which a guide element of the lock projects. Preferably, the guide element is formed on a wall, particularly an inner wall, of the lock housing facing the guide section, for example, in the form of a pin projecting from the housing wall or a screw screwed into the housing wall.

[0033] The guide section can be aligned parallel and offset from the locking section of the bolt. In some embodiments, the guide section is arranged in a direction perpendicular to the base plane of the base plate and parallel and offset from the locking section, so that the bolt is essentially U-shaped in cross-section, with the locking section forming a first leg of the U-shape and the guide section forming a second leg. However, the guide section can also be formed on the drive section, giving the bolt an L-shaped cross-section.

[0034] There are various possibilities regarding the drive-effective coupling between the electric motor and the bolt. In some embodiments, for example, the electric motor can have a drive pinion and the bolt a rack, so that actuation of the electric motor moves the bolt between the unlocked and locked positions.

[0035] According to an advantageous embodiment of the locking unit, the drive unit has a cam that can be driven into a rotary motion by the electric motor and engages in a cam guide of the bolt to drive the bolt along the direction of displacement. In some embodiments, the cam can extend parallel to the axis of rotation of the electric motor and be eccentrically aligned with respect to the axis of rotation of the electric motor.

[0036] The cam of the drive unit and the guide of the bolt can be designed so that the bolt can be moved between the unlocked and locked positions by rotating the cam by a maximum of 180°. Since the cam only needs to move along (a maximum of) a semicircle, a low overall height of the lock, and especially of the drive section of the bolt, can be achieved, while still allowing for effective movement of the bolt.

[0037] According to an advantageous embodiment, the cam of the drive unit is formed on an eccentric body with a cylindrical wall, wherein the cylindrical wall can have several recesses distributed around its circumference, allowing for manual rotation of the eccentric body. The recesses provided in the cylindrical wall allow the bolt to be moved between the locked and unlocked positions in an emergency, for example, if the power supply to a voltage source or energy storage device for driving the drive unit has failed. The lock can be designed such that the recesses for manual repositioning of the bolt are easily accessible only from inside the building.

[0038] The cam can have a round, particularly circular, circumference. However, it is advantageous if the cam extends parallel to the axis of rotation of the electric motor and has two convexly curved rounded sides and two parallel, flat sides along its circumference, with one of the two flat sides being oriented essentially parallel to the base plane of the lock in both the unlocked and locked positions of the bolt (and thus in the end positions of the cam). This also allows for a low overall height of the lock and, in particular, of the drive section of the bolt.

[0039] For particularly secure guidance of the cam in the cam track, the cam track of the bolt can have a straight slot oriented essentially perpendicular to the base plane of the lock. The slot can have essentially the same width as the (maximum) diameter of the cam (especially when viewed in the direction of its rounded sides).

[0040] To operate the lock, it can include a control unit for controlling the drive unit and a radio receiver for receiving control commands. The control unit can be configured to actuate the drive unit, activating the bolt, based on the received commands. The radio receiver can operate according to standardized or proprietary radio protocols, particularly a common home automation standard. Furthermore, the lock can also include a radio transmitter for communicating with other locking units or a remote base station, allowing the base station to monitor and control the locking unit or other locking units.

[0041] The control unit, the radio receiver, and an antenna associated with the radio receiver can be integrated onto a circuit board. In some embodiments, the lock can thus have a circuit board that carries at least the control unit, the radio receiver, and an antenna associated with the radio receiver, with the circuit board positioned perpendicular to the base plane of the lock above the base plate and the bolt. In other words, when the locking unit is installed, the circuit board can be located on the side of the base plate or bolt facing away from the door leaf. This makes the circuit board easily accessible when the lock housing is removed, allowing for easy replacement or repair of the electronic components. Furthermore, the entire circuit board can be replaced if necessary to accommodate other home automation and / or wireless standards.Furthermore, the arrangement of the circuit board above the base plate and the latch offers the advantage that the antenna of the radio receiver or radio transmitter is not, or at most only slightly, shielded by the housing of the locking unit, which advantageously reduces the power consumption of the antenna.

[0042] Alternatively or in addition to a radio receiver, the lock can also have a manually operated switch (e.g. push button) to control the drive unit to drive the bolt or to trigger such control.

[0043] In some embodiments, the lock may further comprise a first contact switch and a second contact switch, wherein the control unit is configured to stop the electric motor in response to actuation of either the first or the second contact switch, and wherein the bolt has only a single actuating section configured to actuate the first contact switch in the locked position of the bolt and the second contact switch in the unlocked position of the bolt. This enables particularly robust and reliable control of the electric motor with a simple mechanical design.

[0044] Furthermore, the lock may have a sash position switch, which serves to detect the closed state of the sash. For example, the sash position switch can be actuated by the bolt formed on the counterpart when the sash is closed. When the sash is opened, the lock moves away from the counterpart and the sash position switch is no longer actuated by the bolt remaining on the frame.

[0045] According to an advantageous embodiment of the locking unit, the control unit, the radio receiver, the antenna associated with the radio receiver, the first and second contact switches, and the wing position switch are all integrated onto a single circuit board. This allows for a particularly compact design of the locking unit. Furthermore, a single circuit board enables particularly easy installation of the locking unit.

[0046] The lock can have a voltage source in the form of an energy storage device to supply electrical energy to the components of the circuit board and / or the drive unit.

[0047] To attach the lock to the window or door sash, the lock's base plate can have at least one mounting opening (preferably several mounting openings) through which the base plate can be attached to the window or door sash using fasteners, such as screws. Spacer plates can be provided to adjust the height of the lock between the base plate and the sash.

[0048] Similarly, the counterpart can also have at least one mounting opening (preferably several mounting openings) through which the counterpart can be attached to the frame or the other sash of the window or door by means of the bolt(s) and / or by means of additional fastening elements, for example, fastening screws. Spacer plates for height adjustment can be provided between the base body of the counterpart and the frame or the other sash.

[0049] The invention relates, regardless of the specific design of the lock with base plate and electrically movable bolt, also generally to a locking unit for a window or door, comprising a lock for attachment to a sash of the window or door that pivots between a closed position and an open position, and a counterpart for attachment to a frame or another sash of the window or door, wherein the counterpart comprises at least one bolt that is oriented perpendicular to a mounting plane of the counterpart and that has a shaft and a head that is wider than the shaft, and wherein the lock has a bolt that can be moved (in particular relative to a base plate) between an unlocked position and a locked position and that interacts with the at least one bolt.to selectively lock the lock against the counterpart in the closed position of the sash and in the locked position of the bolt (in particular by engaging behind the respective bolt head), wherein the counterpart has a cover which has an extendable telescopic sleeve, wherein the cover is biased towards a home position in which the cover rests against an underside of the head of the at least one bolt, and wherein the cover can be pushed back against its bias by means of the lock in order to expose part of the shank of the at least one bolt when the sash is brought into the closed position. Such a locking unit with a telescopically adjustable cover can, moreover, be designed and offer the advantages as explained above.

[0050] The invention is described below by way of example with reference to one possible embodiment and the accompanying drawings. These show: Fig. 1 a perspective view of a locking unit with a lock and a counterpart, wherein a housing and an outer shell of the lock are removed upwards and a base plate is pulled out laterally; Fig. 2 a perspective view of parts of the locking unit according to Fig. 1 with a schematically illustrated installation environment; Fig. 3 a side view of the locking unit of Fig. 2 Fig. 4 a detail of a drive unit and a bolt of the locking unit; Fig. 5 a detail of the drive unit; Fig. 6 an exploded view of the counterpart according to Fig. 1; Fig. 7A a perspective view of the counterpart in an extended basic position of a cover of the counterpart; and Fig. 7B a perspective view of the counterpart in a lowered release position of the cover.

[0051] The drawings show various aspects of a retrofittable electric locking unit for a window or door.

[0052] The locking unit comprises a lock 10 and a counterpart 12. For better illustration, the lock 10 of the locking unit is shown in Fig. 1 shown with the housing 11 and outer shell 13 removed upwards and with the base plate 26 pulled out laterally or to the rear. Figs. 2 and 3 The lock 10 is shown without housing 11 and outer shell 13 and without the fastening screws 15 which are explained below.

[0053] The lock 10 is designed to be attached to a sash 110 of the window or door, which is in Fig 2 The diagram shows a schematic representation. In particular, the lock 10 is designed for attachment in the vicinity of an edge of the sash 110 of the window or door, which, in a closed position of the sash 110, rests against an associated frame 112 of the window or door. The sash 110 of the window or door is pivotable between the closed and open positions, so that the lock 10 attached to the sash 110 pivots along with it when the sash 110 is pivoted.

[0054] The counterpart 12 of the locking unit is designed to engage with the associated frame 112 (in Fig. 2(also shown schematically) or to be attached to another sash of the window or door. By attaching the counterpart 12 to the frame 112 of the window or door, the counterpart 12 is fixed in position relative to the lock 10.

[0055] To attach the lock 10 to the wing 110, a fastening means, for example in the form of fastening screws 15, may be provided (see figure). Fig. 1 However, it is also conceivable that the fastening element is in the form of an adhesive or bonding agent, so that the lock 10 can be attached to the sash 110 by joining or gluing it to the frame. Furthermore, spacers 14, which are arranged between the frame and the lock 10 when the locking unit is attached, serve to compensate for profile differences of the sash 110 or the frame 112.

[0056] In the embodiment shown here, the counterpart 12 is attached to the frame 112 or the other sash of the window or door by two bolts 16 and several fastening screws 17. It is also conceivable that the counterpart 12 is glued to the frame 112. The counterpart 12 can further comprise spacers (not shown) to compensate for profile differences between the frame 112 or the other sash and the sash 110 of the window or door equipped with the lock 10. The counterpart 12 has a telescopically extendable cover 18, which covers a base body 20 and comprises a telescopic sleeve 19 and a lid 21, as will be explained below.

[0057] The bolts 16 protrude at right angles from the base body 20 of the counterpart 12, so that the bolts 16 each relate to a fastening plane B of the counterpart 12, which in the illustration according to Fig. 3perpendicular to the plane of the paper, are aligned at right angles. Each bolt 16 comprises a shaft 22 and a head 24 that is wider than the shaft 22, as is particularly evident from the following: Fig. 3 can be seen.

[0058] The lock 10 includes the base plate 26 (see Fig. 1 ), which is preferably made of metal to protect the lock 10 from unwanted external influences. The base plate 26 has a through-opening 28 for each of the bolts 16. In this way, the respective bolt 16 can protrude through the associated through-opening 28 when the sash 110 of the window or door is in the closed position (see Figure 1). Fig. 2 The base plate 26 also includes several mounting openings 29 for the mounting screws 16.

[0059] The base plate 26 of the lock 10 further defines a base plane G which, in the fixed state of the locking unit, is aligned at least approximately parallel to a wing plane of the wing 110 of the window or door and is shown in the illustration according to Fig. 3 perpendicular to the plane of the paper. Accordingly, the base plane G of the base plate 26 of the lock 10 is essentially parallel to the mounting plane B of the counterpart 12 when the sash is in its closed position. Furthermore, the locking unit is designed such that, in the closed position of the sash 110, a section of the base plate 26 of the lock 10 projects beyond the sash 110 and is located above the base body 20 of the counterpart 12, as shown by Fig. 2 can be seen.

[0060] The lock 10 also has a bolt 30 which is positioned relative to the base plate 26 between a Figs. 1 to 3The unlocking position shown and the locking position not shown in the drawings can be moved, and its direction of movement is R (see drawings). Fig. 2 ) runs parallel to the base plane G of the base plate 26 of the lock 10. In other words, the displacement direction R of the bolt 30 in a fixed state of the locking unit runs parallel to the one in Fig. 2 visible edge 111 of the wing.

[0061] The bolt 30 comprises a flat locking section 32 extending parallel to the base plane G of the base plate 26. As can be seen particularly from Fig. 3 As can be seen, the bolt 30 and in particular the locking section 32 of the bolt 30 is arranged directly above the base plate 26.

[0062] The locking section 32 of the bolt 30 has a position for each bolt 16 in Fig. 1 and 2 Particularly easily recognizable elongated hole 34. As also shown by Fig. 1 and2 As can be seen, the elongated holes 34 are arranged adjacent to each other with respect to the displacement direction R of the bar 30.

[0063] Each elongated hole 34 comprises a passage section 34a for the head 24 of the respective bolt 16 and an engagement section 34b extending from the passage section 34a along the displacement direction R of the bolt 30. To ensure that the engagement section 34b of the elongated hole 34 can securely engage the head 24 of the bolt 16 in the closed position of the sash and the locked position of the bolt 30, the engagement section 34b has a smaller clear width transverse to the displacement direction R of the bolt 30 than the passage section 34a of the elongated hole 34 and than the head 24 of the bolt 16.

[0064] A drive section 36, angled essentially at right angles and extending parallel to the displacement direction R of the bolt 30, is integrally formed on one longitudinal side of the flat locking section 32 of the bolt 30. The drive section 36 of the bolt 30 interacts with an electric motor 38 of a drive unit 40 to drive the bolt 30 in a movement along its displacement direction R. For this purpose, the drive unit 40 has a cam 42 that is rotatable about a rotation axis A of the electric motor 38 by means of the electric motor 38 and engages in a cam guide 44 of the bolt 30 provided on the drive section 36 (see in particular Fig. 4 In the present embodiment, the cam guide 44 has a straight, rectangular slot 48 oriented essentially perpendicular to the base plane G of the lock 10.

[0065] As particularly evident from Fig. 5As can be seen, the cam 42 extends parallel to the axis of rotation A of the electric motor 38 and is arranged eccentrically with respect to the axis of rotation A of the electric motor 38 on an eccentric body 46. Furthermore, the axis of rotation A of the electric motor 38, and thus also the orientation of the cam 42, is essentially perpendicular to the displacement direction R of the bolt 30. Due to the eccentric arrangement of the cam 42 with respect to the axis of rotation A of the electric motor 38 and the perpendicular orientation of the axis of rotation A of the electric motor 38 with respect to the displacement direction R of the bolt 30, the bolt 30 can be moved between the unlocked position and the locked position by rotating the cam 42 by approximately 180°. (Referring to the side view according to...) Fig. 3 For this purpose, the cam 42 performs a semicircular movement counterclockwise, i.e., starting from the unlocked position of the bolt 30 shown, the cam 42 first moves downwards.

[0066] For interaction with the locking bar 30, the cam 42 has two convexly curved rounded sides 50 and two parallel flat sides 52 along its circumference. How Fig. 3 As is particularly evident, in the unlocked position the flat sides 52 of the cam 42 are essentially aligned parallel to the base plane G of the lock 10. By rotating the cam 42 by 180°, the bolt 30 is moved from the unlocked position to the locked position (in Fig. 3 (from left to right), whereby the flat sides 52 are then also essentially parallel to the base plane G of the lock 10 in the locking position.

[0067] The rounded sides 50 of the cam 42 rest against limiting surfaces 54 of the slot 48, which are oriented perpendicular to the base plane G of the lock 10, in both the unlocked and locked positions of the bolt 30. In both the unlocked and locked positions, the bolt 30 is thus held by the cam 42 without play along the displacement direction R. When the cam 42 is rotated about the axis of rotation A of the electric motor 38, at least one of the rounded sides 50 of the cam 42 runs against the limiting surface 54 of the slot 48 facing it, so that the bolt 30 is displaced between the unlocked and locked positions as a result of the rotation of the cam 42.

[0068] To ensure that the bolt 30 is moved as reliably as possible and, in particular, without tilting, the bolt 30 also has a guide section 56 aligned parallel to the displacement direction R of the bolt 30, which emerges from the drive section 36 at a substantially right angle. The locking section 32, the drive section 36, and the guide section 56 of the bolt 30 are angled such that the bolt 30 has an overall U-shaped cross-section in a plane normal to the displacement direction R. The locking section 32 forms a first leg of the U-shape, the guide section 56 a second leg, and the drive section 36 is formed between the two legs of the U-shape.By having the locking section 32 and the guide section 56 of the bolt 30 each form a leg of the U-shape, the locking section 32 and the guide section 56 are offset parallel to each other, with both the locking section 32 and the guide section 56 being aligned parallel to the base plane G of the lock 10.

[0069] To guide the bolt 30, its guide section 56 has two guide slots 58 aligned parallel to the displacement direction R of the bolt 30, into each of which a guide element 60 of the lock 10 projects. In the illustrated embodiment, the guide elements 60 are designed as screws that can be screwed into the housing 11 of the lock 10. In principle, a guide element 60 can also be designed as a pin projecting into the corresponding guide slot 58. Furthermore, it is conceivable that the bolt 30 can also be guided by a single guide element 60 or by more than two guide elements 60 and a guide slot 58 or more than two guide slots 58.

[0070] In principle, it is also conceivable that at least one guide slot for guiding the bolt 30 can be formed alternatively or additionally on the drive section 36 of the bolt 30. If the bolt 30 is guided by means of the drive section 36, the guide section 56 of the bolt is generally unnecessary, so that the bolt 30 can then have an L-shaped cross-section.

[0071] Furthermore, it is also conceivable that the locking section 32 of the bolt 30 can be designed to guide the bolt 30. In this case, the locking section 32 can, for example, have a pin facing the base plate 26, which is guided in a guide groove of the base plate 26 of the lock 10. It is also conceivable that a pin formed on the base plate 26 of the lock 10 engages in a guide groove formed on the locking section 32 of the bolt 30.

[0072] To control the drive unit 40 of the locking unit, the lock 10 has a control unit (not shown in the drawings) which controls the drive unit 40 depending on control commands received via a radio receiver. In principle, the drive unit 40 can also be controlled locally on the lock 10 using the provided operating buttons.

[0073] The control unit is formed on a circuit board 61 located inside the lock 10 (see figure). Fig. 1 The circuit board 61 can also carry the radio receiver and an antenna associated with the radio receiver. For a compact design of the lock 10, the circuit board is arranged above the bolt 30 and the base plate 26 in a viewing direction perpendicular to the base plane G of the lock 10.

[0074] On the same circuit board 61, a first contact switch 62 and a second contact switch 64 are also provided. The first contact switch 62 and the second contact switch 64 are electrically connected to the control unit, the control unit being able to stop the electric motor 38 in response to an actuation of the first contact switch 62 or the second contact switch 64.

[0075] The first contact switch 62 and the second contact switch 64 are each actuated by means of a common actuating section 66 of the bolt 30, which projects away from the drive section 36 of the bolt 30 and is oriented perpendicular to the base plane G of the lock 10. In principle, the actuating section 66 can also be located elsewhere and in a different form on the bolt 30. Preferably, however, the actuating section 66 projects away from the drive section 36 in the direction of the circuit board 61, which allows the first contact switch 62 and the second contact switch 64 to be arranged on the same circuit board 61 in a space-saving manner.

[0076] The circuit board 61 also includes a sash position switch 68, which detects a closed position of the window or door frame. The sash position switch 68 is actuated by means of one of the two bolts 16 when the frame 110 is in the closed position (see in particular Fig. 3 ).

[0077] To supply power to the drive unit 40 and the control unit, the lock 10 also includes a voltage source or an energy storage device. The voltage source can, for example, be in the form of batteries or rechargeable batteries. In the present embodiment, two AA batteries or rechargeable batteries (not shown) are provided as the voltage source. For this purpose, the lock 10 has a compartment 70 for receiving the batteries or rechargeable batteries.

[0078] As demonstrated by Figs. 1 to 3As can be seen, the lock 10, without spacers 14 and apart from the base plate 26, is not significantly higher than the compartment 70 or the cross-section of a Mignon or AA battery or rechargeable battery, so that the lock 10 has a very flat overall design. Similarly, the electric motor 38 and the bolt 30, viewed perpendicular to the base plane G, are also not higher than the cross-section of a Mignon or AA battery or rechargeable battery. The locking unit with the electromechanical lock 10 thus has a compact design with a low profile and small dimensions, even laterally.

[0079] Should the energy storage device or the voltage source fail, a cylinder wall 72 of the eccentric body 46 of the drive unit 40 has several circumferentially distributed recesses 74, which allow for manual rotation of the cam 42. This allows the latch 30 to be moved manually between the unlocked and locked positions, for example, using a slotted screwdriver.

[0080] To further enhance the security of the lock 10, the base plate 26 of the lock 10 has a collar section 76 angled relative to the base plane G on each of its transverse sides extending across the displacement direction R of the bolt 30. The collar sections 76 protect the lock 10 against unauthorized break-in attempts by projecting beyond a plane of extension of the locking section 32 of the bolt 30. Viewed in the displacement direction R of the bolt 30, the bolt 30, the drive unit 40, and the power supply (compartment 70) are arranged between the two collar sections 76. The collar sections 76 thus enclose the essential components of the lock 10, thereby protecting these components against external influences.To further increase protection, correspondingly angled collar sections can also be provided on the longitudinal sides of the base plate 26 which are aligned parallel to the displacement direction R of the bar 30.

[0081] Various operating states of the locking unit can be detected by means of the contact switches 62, 64 and the wing position switch 68, as will now be explained.

[0082] In the first operating state, the first contact switch 62 is actuated, and the second contact switch 64 and the sash position switch 68 are not actuated. In this operating state, the bolt 30 is unlocked, and the sash 110 of the window or door is free for a pivoting movement.

[0083] When the wing 110 is closed from the open position, the wing position switch 68 is actuated, whereby, without the bolt 30 moving from the unlocked position to the locked position, only the first contact switch 62 remains actuated. The locking unit is now in a Fig. 2 and 2 The second operating state shown, in which the wing 110 is closed but not yet locked by the locking unit.

[0084] By moving the bolt 30 from the unlocked position to the locked position with the sash 110 closed, the locking unit enters a third operating state in which the window or door is closed and locked. In this state, the second contact switch 64 is actuated, while the sash position switch 68 also remains actuated.

[0085] In a fourth operating state, the bolt 30 is indeed in its locked position and actuates the second contact switch 64. However, situations are conceivable in which the sash position switch 68 is no longer actuated. Such a situation can arise, for example, if a user wants to open the sash 110 of the window or door using a handle (not shown) by moving the handle to its open position, but has forgotten to unlock the locking unit beforehand. In this case, the user wants to open the sash 110, whereby the head 24 of the bolt 16 is moved away from the sash position switch 68 and towards the bolt 30. In this case, in some embodiments, the locking unit can, by means of the control unit, cause the bolt 30 to be unlocked by moving the bolt from the locked position to the unlocked position.

[0086] If, however, the window or door handle is not moved to the open position, the control unit interprets any movement of the bolt head 24 away from the sash position switch 68 as an unauthorized break-in attempt and can trigger an alarm signal. The alarm signal can be emitted, for example, audibly or visually by the locking unit. It is also conceivable that the alarm signal is transmitted via the radio unit to another device, such as a main station or a mobile device.

[0087] Furthermore, two special operating states of the locking unit can be detected. In the first special operating state, none of the switches 62, 64, 68 are actuated. In this state, the sash 110 of the window or door is open, and the bolt 30 is located between the first contact switch 62 and the second contact switch 64; that is, the bolt 30 is neither in the unlocked nor in the locked position, but rather in a state between these two positions. Here, the control unit can cause the bolt 30 to be moved into its unlocked position in order to return the locking unit to the first operating state in a controlled manner.

[0088] In a second special operating state, neither the first contact switch 62 nor the second contact switch 64 is actuated, but the sash position switch 68 is. In this special operating state, the control unit can detect that the sash of the window or door is closed, but the bolt 30 is not properly locked. Consequently, the control unit can cause the drive unit 40 to move the bolt 30 towards the locking position until the actuating section 66 of the bolt actuates the second contact switch 64 and the bolt 30 is in its locking position. As a result of the actuation of the second contact switch 64, the electric motor 38 of the drive unit 40 can then be stopped.

[0089] Based on the Fig. 6 and 7An advantageous embodiment of the counterpart 12 will be explained in more detail below. As already mentioned, the counterpart 12 has a telescopically extendable or compressible cover 18, which at least partially covers the base body 20 of the counterpart 12 and includes the telescopic sleeve 19 and the cover 21. The heads 24 of the bolts 16 protrude from the cover 18. For this purpose, the cover 21 has corresponding openings through which the bolt shafts 22 protrude.

[0090] The cover 21 of the cover 18 is pre-tensioned by means of two coil springs 23 in the direction of a basic position in which the cover 18 or the cover 21 rests against the underside of the bolt heads 24, as shown in Fig. 7AThe preload springs 23 are positioned in line with the two outer mounting screws 17 of the counterpart 12 and are positively engaged at one end in the base body 20. The direction of the preload runs parallel to the longitudinal axes of the bolts 16. In the closed position of the wing 110, the base plate 26 of the lock 10 can push the cover 18 back against its preload into a release position in which the respective shaft 22 of the bolts 16 is partially exposed to allow the bolt heads 24 to engage behind the locking mechanism by means of the latch 30. For this purpose, individual segments of the telescopic sleeve 19 are partially pushed together or into one another. This release position is shown in Fig. 7B shown and corresponds to the state as shown Figs. 1 to 3 The cover 18 thus allows the counterpart 12 to have a closed appearance when the wing 110 is open, without the bolts 16 protruding far from the counterpart 12. Reference symbol list

[0091] 10 Lock 11 Housing 12 Counterpart 13 Outer shell 14 Spacer of 10 15 Mounting screw of 10 16 Bolt 17 Mounting screw of 12 18 Cover of 12 19 Telescopic sleeve of 18 20 Base body of 12 21 Cover of 18 22 Shaft 23 Tension spring 24 Head 26 Base plate 28 Through hole 29 Mounting holes 30 Latch 32 Locking section of 30 34 Slotted hole 34a Through hole of 34 34b Overlap section of 34 36 Drive section of 30 38 Electric motor 40 Drive unit 42 Cam 44 Slide guide 46 Eccentric body 48 Slot 50 Round side 52 Flat side 54 Boundary surface 56 Guide section of 30 58 Guide slot 60 Guide element 61 Circuit board 62 First contact switch 64 Second contact switch 66 Actuating section of 30 68 Wing position switch 70 Slot 72 Cylinder wall 74 Recess 76 Collar section of 26 110 Wing 111 Edge of wing 112 Frame B Mounting plane G Base plane A Axis of rotation R Displacement direction

Claims

1. A retrofittable electric locking unit for a window or a door, comprising a lock (10) for fastening to a leaf (110) of the window or the door, said leaf (110) being pivotable between a closed position and an open position, and a counterpart (12) for fastening to a frame (112) or to a further leaf of the window or the door, wherein the counterpart (12) comprises at least one bolt (16) which is oriented at a right angle to a fastening plane (B) of the counterpart (12) and which has a shaft (22) and a head (24) that is widened relative to the shaft (22), and wherein the lock (10) has: a base plate (26) which defines a base plane (G) and which has at least one passage opening (28) for the bolt (16); a latch (30) which can be displaced relative to the base plate (26) between an unlocking position and a locking position and which has, at a locking section (32), an elongate hole (34), which has a passage section (34a) for the head (24) of the bolt (16), and a rear-engaging section (34b) extending along the direction of displacement (R) of the latch (30) from the passage section (34a), wherein the rear-engaging section (34b) has a smaller clear width transversely to the direction of displacement (R) of the latch (30) than the passage section (34a) of the elongate hole (34) and than the head (24) of the bolt (16) in order to engage behind the head (24) of the bolt (16) in the closed position of the leaf (110) and in the locking position of the latch (30); and a drive unit (40) for displacing the latch (30), characterized in that the drive unit (40) has an electric motor (38) having an axis of rotation (A) which is aligned parallel to the base plane (G) and which is oriented at least substantially at a right angle to the direction of displacement (R) of the latch (30).

2. A locking unit according to claim 1, wherein the locking section (32) of the latch (30) is formed flat and extends parallel to the base plane (G) of the lock (10); and / or wherein the locking section (32) of the latch (30) is arranged above the base plate (26).

3. A locking unit according to claim 1 or 2, wherein the direction of displacement (R) of the latch (30) extends parallel to the base plane (G) of the base plate (26) of the lock (10); and / or wherein the lock (10) is configured for fastening to an edge (111) of the leaf (110) of the window or the door, wherein the direction of displacement (R) of the latch (30) extends parallel to the leaf edge (111) in a fastened state of the locking unit.

4. A locking unit according to any one of the preceding claims, wherein the counterpart (12) has a base body (20) from which the bolt (16) projects, wherein the locking unit is configured such that, in the closed position of the leaf (110), at least one section of the base plate (26) of the lock (10) is arranged above the base body (20) of the counterpart (12).

5. A locking unit according to any one of the preceding claims, wherein the counterpart (12) has a covering (18) which has an extendable telescopic sleeve (19), wherein the covering (18) is preloaded towards a base position in which the covering (18) contacts an underside of the head (24) of the at least one bolt (16), and wherein the covering (18) can be urged back against its preload by means of the base plate (26) of the lock (10) in order to expose a part of the shaft (22) of the at least one bolt (16) when the leaf (110) is brought into the closed position.

6. A locking unit according to any one of the preceding claims, wherein the counterpart (12) has at least two bolts (16) and the latch (30) has two elongate holes (34) which are each assigned to the bolts (16), wherein the elongate holes (34) are arranged adjacent to one another along the direction of displacement (R) of the latch (30).

7. A locking unit according to any one of the preceding claims, wherein the base plate (26) has, at at least one transverse side extending transversely to the direction of displacement (R) of the latch (30) and / or at at least one longitudinal side extending along the direction of displacement (R) of the latch (30), a collar section (76) which is angled with respect to the base plane (G) and which projects over the plane of extent of the locking section (32) of the latch (30).

8. A locking unit according to any one of the preceding claims, wherein the latch (30) has a drive section (36) which extends parallel to the direction of displacement (R) of the latch (30) and which is angled with respect to the locking section (32) of the latch (30), wherein the drive unit (40) engages at the drive section (36) of the latch (30) in order to drive the latch (30) to make a movement along the direction of displacement (R).

9. A locking unit according to any one of the preceding claims, wherein the latch (30) has a guide section (56) which extends parallel to the direction of displacement (R) of the latch (30) and which is configured to guide the latch (30) in the lock (10).

10. A locking unit according to claim 9, wherein the guide section (56) has an elongate guidance hole (58) which is aligned parallel to the direction of displacement (R) of the latch (30) and into which a guide element (60) of the lock (10) projects; and / or wherein the guide section (56) extends offset in parallel from the locking section (32) of the latch (30); and / or wherein the latch (30) is substantially U-shaped in cross-section and the locking section (32) of the latch (30) forms a first leg of the U shape and the guide section (56) of the latch (30) forms a second leg of the U shape.

11. A locking unit according to any one of the preceding claims, wherein the drive unit (40) has a cam (42) which can be driven to make a rotational movement by means of the electric motor (38) and which engages into a slot guide (44) of the latch (30) in order to drive the latch (30) along the direction of displacement (R).

12. A locking unit according to claim 11, wherein the cam (42) of the drive unit (40) and the slot guide (44) of the latch (30) are configured so that the latch (30) can be displaced between the unlocking position and the locking position by a rotation of the cam (42) by a maximum of 180°; and / or wherein the cam (42) extends parallel to the axis of rotation (A) of the electric motor (38) and has, along its circumference, two convexly curved round sides (50) and two flat sides (52) aligned parallel to one another, wherein, in the unlocking position and in the locking position, a respective one of the two flat sides (52) is aligned substantially parallel to the base plane (G) of the lock (10); and / or wherein the slot guide (44) of the latch (30) has a rectilinear slot (48) oriented substantially at a right angle to the base plane (G) of the lock (10); and / or wherein the cam (42) of the drive unit (40) is formed at an eccentric body (46) having a cylinder wall (72), wherein the cylinder wall (72) has a plurality of circumferentially distributed recesses (74) which enable an engagement for a manual rotation of the eccentric body (72).

13. A locking unit according to any one of the preceding claims, wherein the lock (10) has a control unit for controlling the drive unit (40) and a radio receiver for receiving control commands, wherein the control unit is configured to control the drive unit (40) to drive the latch (30) in dependence on the received control commands.

14. A locking unit according to claim 13, wherein the lock (10) has a circuit board (61) which carries the control unit, the radio receiver and an antenna associated with the radio receiver, wherein the circuit board (61) is arranged above the base plate (26) and the latch (30) with respect to a direction of arrangement extending perpendicular to the base plane (G) of the lock (10); and / or wherein the lock (10) has a first contact switch (62) and a second contact switch (64), wherein the control unit is configured to stop the electric motor (38) in response to an actuation of the first contact switch (62) or the second contact switch (64), and wherein the latch (30) has a single actuation section (66) which is configured to actuate the first contact switch (62) in the locking position of the latch (30) and the second contact switch (64) in the unlocking position of the latch (30).