Abstract: A magnet latch applying magnetic force for opening and closing the upper and lower cases is provided. The magnet latch includes a push button, a sliding block, a magnet, a magnetic hook, and an elastic member. To close the upper and lower cases, one moves the push button to slide the sliding block to one side. The magnetic hook is attracted by the magnet to move upwards. Once the magnetic hook attaches to the magnet, the push button is released and the sliding block moves toward and holds the magnetic hook, so as to achieve the purpose of magnetic latching. On the other hand, to open the upper case, one moves the push button to slide the sliding block to the other side, thereby opening up the upper case. Due to the weakened magnetic force and its own gravity, the magnetic hook returns back into the lower case.

Abstract: An LC oscillation-based magnetic lock is described, which mainly includes an electromagnet set having an E-type iron core and a magnetic field generating coil set, and an armature plate. The electromagnet set and the armature plate are installed on a door panel and a door jamb, respectively. By means of the attractive or repelling force between the aforementioned each other, and by controlling the magnetism of the electromagnet set, the door panel is caused to be opened or closed. The LC oscillation-based circuit being a coil set disposed nearby the magnetic field generating coil set and oscillating in an oscillation frequency when an inductance variation has occurred, the oscillation frequency is then corresponded to the inductance variation; and a control circuit is to determine an open/close state of the door panel according to the oscillation frequency calculated.

Abstract: A magnetic safety closure for a protection device that is movable with respect to a fixed part includes a housing that is attachable to the protection device and includes a handle for opening and closing the protection device. The housing includes a sensor housing that is attachable to the fixed part and provided with a sensor for determining whether the protection device is closed or open. The housing attachable to the protection device has an initiating device for the sensor and is opposite the sensor when the protection device is closed. The housing and the sensor housing share a magnet arrangement having at least one holding magnet and an associated pole plate. The handle is a two armed lever pivotably mounted on the housing, with arm of the lever facing the sensor housing with its free end disconnecting the holding magnet from its associated pole plate when the handle is pivoted out in order to open the protection device.

Abstract: A magnetic fastening system for connecting a first member against a second member. The system includes a first flexible magnet longitudinally associated with at least a portion of an edge of the first member and a second flexible magnet longitudinally associated with at least a portion of an edge of the second member. The first and second flexible magnets are aligned to attract one another as the first and second members are moved into their connected position to then pull the first and second members into connecting contact.

Abstract: A ground lock fitting comprises: an upper cover comprises a top surface and an upper sidewall, wherein a guiding hole is provided on the top surface and a thread is provided on the upper sidewall; a lower cover comprises a base surface and a lower sidewall, wherein a mounting hole is provided on the base surface; the upper cover is connected with the lower cover to form a chamber in which a locking bar comprising a mainbody and a stopper attached thereunder is disposed; and a magnetized portion is provided on top of the mainbody in which a locking hole is provided. The ground lock fitting is hidden from view, hard to break open and convenient to use such that it can be widely used in rolling shutter gates for stores and the like.

Abstract: A safety lock for a closing-off device which can be opened, has an actuating unit with an actuator which is guided in a displaceable manner, and has a locking unit into which the actuator, with the closing-off device closed, can be pushed and can be locked via an electromagnetically actuable, pivotable catch, by way of interengaging engagement surfaces, the actuator has a trigger element and the locking unit has a response element which, with the actuator pushed in, reacts to the trigger element by emitting an electric signal which triggers the locking action, in the case of which the catch can be pivoted about an axis extending parallel to the movement direction of the actuator, and the engagement surfaces of the catch and of the actuator run perpendicularly to the movement direction.

Abstract: A concealed panel locking mechanism is provided which may be used to secure the contents of a container in a manner that is not discernable to an uninformed individual viewing the container. In one exemplary embodiment, the locking mechanism includes one or more channels formed into a central area of a panel of material. A locking member within the one or more channels is movable along the channel to either engage or disengage the locking member from a recess formed in a side wall of the container. In one embodiment, the locking member is not physically accessible from outside the channel by a human being but is formed from a ferromagnetic material that is moved within the channel by a magnetic force generated by a suitable strength magnetic key placed on the outside surface of the panel.

Abstract: A magnetic switch is disclosed to include a first magnetic device affixed to a second member of a lifting cover type of a article, a driven rod slidably mounted in a first member of the lifting cover type of the article that is hinged to the second member, a holder member mounted on the driven rod and holding a second magnetic device for attracting the first magnetic device to keep the fist member and the second member in the closed position, a spring member that imparts a pressure to the driven rod to hold the holder member in such a position that the second magnetic device attracts the first magnetic device, and a key extending out of the first member of the lifting cover type of the article for operation by hand to move the driven rod to the position where the second magnetic device repulses the first magnetic device to force the second member away from the first member.

Abstract: This patent refers to an electronic equipment unit, which is intended to collects, process and transfer data from a certain area, which it monitors, to a telemetry system. In more detail, data are collected from various intrusion monitoring sensors (e.g. infra-red or microwave detectors), water level detectors, smoke detectors, electrical supply watchdogs etc. These sensor are external and use the logic circuits of the printed circuit board. The above mentioned data are suitably processed by the unit and the output is sent to a telemetry system via an external interface box. The advantages of this patent is the small size of the device and the low cost of the construction and operation of the device. It integrates on one printed circuit board (PCB) the processor and the logic circuits of a variety of sensors. Owing to its small size, the device can be easily installed inside sealed cellular telephony antenna shelters (outdoor shelters).

Abstract: An electronic apparatus having a magnetic switch includes a first body, at least one magnetic component, a second body, and a magnetism barrier. In this case, the first body has at least one space. The magnetic component is accommodated in the space. The second body has at least one magnetizer, which is opposite to the magnetic component. The second body is pivoted on the first body. When the first body and the second body are closed, the magnetic component and the magnetizer face to each other. The magnetism barrier is disposed in the space of the first body. The magnetism barrier is disposed between the first body and the magnetic component.

Abstract: Magnetic action lock for inside doors, comprising a case fixed in a cavity of the impost wing of the door and a frontal closure plate, a strike in the jamb of the door which can be opposed to said frontal plate, a bolt and a mechanism for movement of said bolt, a pair of magnets inserted in the head of said bolt and in said strike respectively, wherein the position of opening of said bolt is obtained thanks to the concatenation of magnetic flows between the magnet in said bolt and the frontal closure plate, while the position of closure is achieved thanks to the attraction of the magnet in said bolt by the magnet in said strike, wherein the magnets have the poles oriented parallel to the axis of motion of said bolt, the case and the frontal closure plate are in ferromagnetic material and the strike is in a non-magnetic material.

Abstract: A door latch assembly of a motor vehicle is provided for selectively engaging a striker between latched and unlatched positions. The door latch assembly includes a ratchet for receiving and engaging the striker. The door latch assembly also includes a pawl movable between a locked position, in which the pawl abuts the ratchet into engagement with the striker, and an unlocked position, in which the pawl and the ratchet are spaced apart from one another so that the ratchet releases the striker. In addition, the door latch assembly includes an electromagnet disposed adjacent the pawl for generating a magnetic field to alter the force required to move the pawl out of the unlocked position and into the locked position.

Abstract: A closing device for an opening part of a piece of furniture comprises a magnetic detent for retention of the part in a closed position in combination with a thrust “pull-push” mechanism for detachment from the magnetic detent upon command, so as to cause opening of the opening part of the piece of furniture.

Abstract: A magneto-mechanical locking device for locking a door can be displaced in relation to a stationary frame. The locking device contains a locking element produced from a magnetizable material and disposed on the frame. The locking device further has a permanent magnet that is mounted on the door and can be twisted from a first release position, in which the locking element is subject to substantially no action of magnetic force, to a second locking position, in which the locking element is attracted by the action of magnetic force of the permanent magnet and locks the door.

Abstract: A latch mechanism includes a claw rotatable between a latched position and an unlatched position, and an actuator motor. A toggle link that includes a first end, a second end, and a joint between the first end and the second end of the toggle link has one end attached to the actuator motor. The other end of the toggle link interacting with the claw to rotate the claw between the latched position and the unlatched position. A pawl engages the claw when the claw is in a latched position. A release link is attached between the joint of the toggle link and the pawl.

Abstract: An apparatus with a two-way hidden latch. A main body comprises a magnet disposed under a retainer, which fixes the two-way latch disposed in a cover portion. The cover portion can be placed on the main body with a first or second surface facing downward. The cover portion comprises a first and second opening and a two-way latch is disposed near the two openings. When the cover portion is open, the two-way latch is fixed at an original position and hidden in the cover portion. When the cover portion covers the main body with the first surface facing downward, the two-way latch is drawn by the magnet to a first position, engaging the retainer. Moreover, when the cover portion covers the main body with the second surface facing downward, the two-way latch is drawn by the magnet to a second position, engaging the retainer.

Abstract: A magnetic lock comprises an actuation portion; a positioning seat having a slot at a rear end thereof for receiving the actuation portion and a circuit board; a tongue embedded at the slot at the lower end of the positioning seat and being fixed to the connecting sheet; the tongue being movable within the positioning seat; a retaining seat having a displace unit; a core embedded into the slot of the retaining seat and to combine with the displace unit; thereby the movable post, driving sheet, connecting sheet and tongue being interconnected. The magnetic lock is suitable for doors of various specifications. Furthermore, the magnetic lock has an open mode in power-on state and a close-mode in power-off state. Moreover, a pin serves to achieve the object of function setting modes. The magnetic lock has the functions of a mechanical lock and an electronic lock.

Abstract: A magnetic latch assembly includes a latch member movably mounted to a first object such as a door, and a retainer arranged in a second, opposing object such as a door frame. The latch member includes a latch arm, a hook formed on the distal end of the latch arm, and a first magnet mounted in the hook. The retainer includes a housing with a cavity and a second magnet. The cavity includes a first horizontal passage and a second vertical passage communicated with the horizontal passage. The second magnet has a magnetic pole of opposite polarity from the magnetic pole of the first magnet. When the first and second objects are relatively moved toward each other, the latch arm is moved into the first passage of the cavity.

Abstract: A portable door lock with a strike plate, a bolt, and a magnet is disclosed. The strike plate has a boss that fits into the recess of a door frame, and has at least one aperture for accommodating the bolt. The strike plate may also have a handle for gripping by the user when inserting the strike plate into the recess of a door frame. Once the strike plate is fitted into the recess of a door frame, a bolt is inserted through the aperture or apertures, and the magnet is placed in the area between the door, the strike plate, and the bolt. The door is thereby secured, without the need for any tools.

Abstract: A fastener module for portable computers that is disposed on the host of a portable computer to fasten the LCD with the host, no matter whether the LCD is closed directly or after rotating 180 degrees; the fastener module has a pivotable eccentric hook rod biased in a normal horizontal position when not affected by magnetic effect, when the LCD closes on the host of the computer, both sides of the hook rod are affected by the magnetic effect of the magnetic component on the LCD; since the pivot of the hook rod is designed eccentrically, the magnetic moment generated by the magnetic effect for each side of the hook rod is different, so that the hook rod changes its position instantly from the normal horizontal state to a vertical state and hooks within the opening of the LCD to fasten the LCD onto the host of the portable computer.

Abstract: A latching system for removably securing a first structure to a second structure. The system includes at least one magnetically permeable latch bar pivotally coupled to the first structure, and a biasing spring that pivots the latch bar to a latched position within a recess in the second structure, thereby securing the first structure to the second structure. Additionally, the system includes an unlatching tool that includes an embedded magnetized bar that generates a magnetic field around the unlatching tool. The unlatching tool can be used to pivot the latch bar to an unlatched position by placing the unlatching tool in close proximity to the latch bar such that the magnetic field exerts a rotational force on the latch bar, thereby pivoting the latch bar to the unlatched position.

Abstract: Apparatus for improving the rigidity of a vehicle structure, and particularly a vehicle having a retractable roof. The apparatus includes an electromagnet carried by either an edge of a door of the vehicle that swings outwardly when the door is open, or by an opposing edge of bodywork of the vehicle which faces the edge of the door when the door is closed. The electromagnet serves as a first element which, when the door is closed, is positioned opposite a second element made of a magnetic material. One of the elements is able to move toward the other element when the electromagnet is provided with an electric current. One of the elements is provided with a protuberance formed in the shape of a truncated cone, and the other element is provided with an axially-aligned recess which has a size and shape to receive the protuberance therein.

Abstract: A mechanism for selectively locking and unlocking a vehicle door latch, comprising a rheological fluid in operable connection with an output and an input, the fluid acting so as to in a first state prevent actuation of the output upon actuation of the input and in a second state permit such actuation.

Abstract: The present invention relates to a latch device for a portable computer, a portable computer having same and methods thereof. Embodiments of a latch device for a portable computer having a display, which operates to be folded onto or unfolded with respect to a main body, can include first and second magnetic members correspondingly provided at one of the display and the main body, respectively. A magnetic force of the first and second magnetic members can be exerted therebetween when the display is folded onto the main body to cause the display to be engaged with the main body.

Abstract: A magnetic latch system including a latch assembly and a keeper assembly. The keeper assembly includes a magnetically attractable keeper pin. The latch assembly includes a magnet and a movable internal lever which is arranged to engage the keeper pin to move it away from the permanent magnet. The system may also include a lock to hold the internal lever in a fixed position so that it cannot be moved to move the keeper pin away from the magnet.

Abstract: An electrified cylindrical lock having a reversible solenoid that can be easily changed over between active push and active pull. The solenoid includes a coil and an armature that may be assembled for an active push or an active pull of a latch member. The coil has a front end and a rear end. The front coil end always faces toward the latch member and the rear end always faces away from the latch member. The armature includes a magnetic slug. The slug is disposed at the rear coil end for the active push mode or disposed at the front coil end for the active pull mode.

Abstract: An electrified cylindrical lock having a reversible solenoid that can be easily changed over between fail safe and fail secure. The solenoid includes a coil and an armature that may be assembled for an active push or an active pull of a latch member. The latch member locks or unlocks the lock. The coil has a front end and a rear end. The front coil end always faces toward the latch member and the rear end always faces away from the latch member. The armature includes a magnetic slug. The slug is disposed at the rear coil end for the active push mode or disposed at the front coil end for the active pull mode.

Abstract: A restraint system for an appendage includes a clamp assembly and an electromagnet capable of being selectively activated for restraint. The clamp assembly includes a base portion and a restraint structure opposing the base portion. The restraint structure defines an opening for receiving an appendage between the base portion and the restraint structure. When the electromagnet is activated for restraint, the clamp assembly restrains an appendage extending in the opening. Another restraint system includes an inflatable bladder arrangement selectively activated to inflate to a first state and to deflate to a second state. When in the first state, the bladder arrangement defines an opening for passing of an appendage there through; however, when in the second state, the bladder arrangement defines an opening that precludes withdrawal of an appendage extending there through.

Abstract: An apparatus has a body having a channel. A display support member has a first end pivotally coupled to the body and a second end. A display housing has a bottom portion. The display housing is pivotally coupled to the second end of the display support member. A first latch member is coupled to the bottom portion of the display housing. The first latch member is adapted to be received by the channel and hold the display housing.

Abstract: A magnetic fixing unit having a first and second sub-assembly with cooperative structure for increased strength of assembly and prevention of mutual shifting between the first and the second assemblies. The magnetic fixing unit further includes a guide structure on one of the first and second assemblies to effect cooperative locking engagement with an engaging member on the other of the assemblies.

Abstract: A magnetic latch mechanism and related process for easily and reliably performing a latch operation by moving a magnetically attractive catch plate into and out of engagement with a magnetic field. When in engagement, the latch is secured. When the catch plate is moved away from engagement, the latch can be opened. A magnetic latch for a marking system, particularly for panels covering paper path and jam clearance mechanisms.

Abstract: A folding frame includes an upper body, a lower body, a fixing device disposed on the upper body, a hook rotatably coupled to the lower body, and a fastener for rotating the hook opposite to the lower body. The fastener comprises a shaft of which a first end is coupled to the hook, a spring of which a first end is coupled to a second end of the shaft, and a latch pin capable of moving the spring thereby moving the shaft for rotating the hook, and of which a first end of the latch pin is coupled to a second end of the spring. The hook is unhooked from the fixing device when the hook is rotated into the lower body, and the hook is engaged with the fixing device when the hook is rotated out from the lower body.

Abstract: The present invention is to provide a magnetic lock mountable on an electronic device, which comprises an upper and a lower magnetic plates respectively formed on an upper and a lower housings of the electronic device, enabling the electronic device to be automatically locked due to the attraction between a plurality of magnetic members disposed on the corresponding positions of the upper and lower magnetic plates having different polarities when the upper housing is covered the lower housing. Alternatively, when the upper magnetic plate is moved a predetermined distance, the corresponding magnetic members on the upper and lower magnetic plates are in turn having the same polarity to repel with each other, enabling the upper and lower housings of the electronic device to be automatically unlocked.

Abstract: Apparatus and methods for generating repeatable closure of a volume measurement chamber are provided. More particularly, in one embodiment of the present invention, a dual articulating hinge is used to affix a chamber door to a volume measurement chamber, providing repeatable closure of a chamber door. In another embodiment of the invention, a laterally compliant magnetic latch is used to fasten a chamber door to a volume measurement chamber. In a third embodiment, a chamber door lid is mounted to a hinge bar via a ball joint, allowing the chamber door lid to self center about the chamber opening.

Abstract: An electromechanical lock includes a latching assembly secured to a first structure, a catch piece secured to a second structure, and an electromechanical device. The latching assembly includes at least one latch element movable between a capture and release states to mechanically engage and disengage the catch piece, an arming member movable between a first and second positions wherein the latch element is released and captured, and a biasing element to urge the arming member into the first position. When the electromagnetic device is switched “on”, it magnetically engages the arming member with sufficient force to overcome the biasing force whereby movement of the catch piece away from the received state results in the latch element moving into the capture state to prevent separation of the first and second structures; when the electromagnetic device is switched “off”, the first and second structures may be separated.

Abstract: Door-lock hardware is constructed of corrosion-resistant material such as stainless steel. Such a material lacks magnetic properties to permit use in association with magnetic switches coupled to signal alarm and security systems. However, according to the preferred embodiment of the invention, a door latch of stainless steel or other non-magnetic material includes a ferrous-coated tongue portion to maintain compatibility with such monitors and alarms while providing a higher level of rust- and corrosion-resistance.

Abstract: An indicating lock for a rimless glass door is composed of a seat assembly, a driving member, a latching member, an indicating ring, and a clamping member. The seat assembly has an interior seat and an exterior seat. The driving member has an interior disk and an exterior disk. Multiple magnetic elements are installed in the interior disk and the exterior disk with opposite polarities. By using the magnetic force, the indicating lock can be securely and easily installed on a rimless glass door without cutting the glass of the door. An indicating ring is provided between the exterior disk and the exterior seat. Those outside the door can conveniently know whether the door is locked by observing the indicating ring.

Abstract: The invention concerns an electromagnetic lock comprising two parts, one of which comprises an electromagnet and the other a mobile armature capable of moving to counter the return springs when the electromagnet is energized. One of the parts has at least one protuberance extending from one edge of the corresponding part to the proximity of the other edge, the protuberance sized and positioned to be capable of penetrating into a housing of the other part when the parts coincide and the electromagnet is energized, the height of the protuberance being less than the distance normally separating the two parts when the electromagnet is not energized. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A lock for earthquakes that securely holds a door closed when an earthquake strikes, but it otherwise out of the way during normal use. It consists of a steel ball that is positioned at the top of an angled ramp. A magnet is embedded on the inside surface of the door, where it is invisible under normal use. When an earthquake strikes, the steel ball drops and contacts the magnet. At this point, the door is effectively locked. The system is designed so that the magnet is strong enough to securely hold the door closed, but can be easily overcome to open the door after the event is over. Once the event is over, the system can be reset by pulling the door open with enough force to overcome the magnet and placing the ball back up into its ready position. When closed, the cabinets appear to be perfectly normal.

Abstract: The invention provides for an electromagnetic lock (10) for a door. The lock (10) includes a backing plate (12) which is connectable to a door frame, an electromagnet (14), a housing (30) for the electromagnet, and an armature plate (16) connectable to a door (32) which is displaceable relative to the housing (30) between a closed condition in which it engages the housing and an open condition in which it is spaced from the housing. The lock (10) also includes two locking arms (18) which are movable between an operative position in which they engage the armature plate (16) and the backing plate (12) to capture the armature plate in the closed condition and an inoperative position in which they allow the armature plate to disengage the housing (30).

Abstract: A doorknob cover comprise a hollow cylindrical body and an element which is capable of attracting magnetically or being attracted magnetically. The cylindrical body is provided in one side with an elastic opening, and in other side with the element. The doorknob cover is fitted over the doorknob via the elastic opening. As the door is swiveled toward a wall, the doorknob is arrested by a magnetic seat of the wall due to the magnetic attraction between the element of the doorknob and the magnetic seat of the wall.

Abstract: A magnetic lock device operated by means of transponder is provided with at least an electromagnet mean (2) connected to a fixed portion (3) of a door (4) and with at least a keeper mean (5) fixed to the door (4) and, in a closing condition of this latter, facing the electromagnet mean (2). The device (1) includes: a control mean (6) for switching the electric supply of the electromagnet mean (2); a sensing mean (9) in data connection with the control mean (6) and fit to sense the proximity of a plurality of mobile transponders (10) each one associate to a respective operator. The control mean (6) is fit to interrupt the electric supply to the electromagnet mean (2) when the sensing means (9) senses the proximity of at least a transponder (10) and vice versa.

Abstract: A magnetic locking device is described. The magnetic locking device is utilized for locking an electric device upper cover especially for locking both sides of the display cover of a notebook/tablet dual-purpose personal computer. The magnetic locking device has a lock module and a hook module. The lock module installed in the upper cover has a lock module base, a release button, a magnet, a first bezel and a second bezel. The hook module installed in the electric device base has a hook module base, a spring device, and a hook. The spring device pulls the hook to hide in the electric device base when the hook is not working to improve the electric device appearance and to eliminate interference during operation.

Abstract: A push bar locking mechanism for locking and unlocking a door also comprising a push bar arranged integral to a bar frame such that the push bar can be moved relative to the bar frame. An elongated link is integral to the push bar and bar frame and is movable in response to the push bar movement relative to the bar frame. The movement of the elongated link causes a door locking mechanism to move between a locked and unlocked position. An electromagnetic locking mechanism is included that can be changed between an energized and de-energized state by an electrical signal, wherein the electrical locking mechanism generates a magnetic field when energized. An armature is also included in proximity to the electromagnetic locking mechanism and the elongated link. The armature prevents movement of the elongated link when the electromagnetic locking mechanism is energized.

Abstract: A magnetically engageable latch assembly used for display cases and the like for secure closure that has a male protrusion and a female cavity. Either the male protrusion or the female cavity will have a permanent magnet while the other will have a metal conductor that will attract the permanent magnet due to its magnetic field. The female and male connection prevents movement of the latch assembly in the lateral direction. Alternatively disclosed is a male and female connection that each contains permanent magnets. A plastic stop within the cavity is also disclosed that prevents deterioration of the female cavity.

Abstract: A pivotally mounted armature assembly is mechanically moved into engagement with an electromagnet assembly bringing the components of a secondary locking system between the assemblies into position to become active if a predetermined force is applied to slide the armature assembly across an energized electromagnet assembly.

Abstract: A magnetic door stop/latch contains a first magnet mounted on or within a door and a second magnet mounted on or within a structure opposing the door, such as a wall, door jamb, door frame or baseboard. When the door is moving towards the opposing structure, the magnetic door stop may used to prevent the door from slamming into the opposing structure by virtue of the repulsive forces of the magnets. The magnetic door stop may be switched from repulsive configuration to an attractive configuration that holds the door in position.

Abstract: A magnetic lock includes a first metal block securely received in the first frame, and an electrical magnet adapted to connect to a power source to selectively become a magnet and a second frame adapted to be mounted on a door and provided with a second metal block movable respect to the first metal block and the second frame. The second metal block has two retaining recesses to respectively receive therein two clamping blocks. Each of the two clamping blocks is adapted to be movably received in the two retaining recesses and has a recess to receive therein one of the two bolts. When the second metal block is moved by an external force, an inner side face of the recess of each of the clamping blocks abuts a side face of each of the bolts so that the door is still secured to the doorframe.

Abstract: The invention concerns a device comprising between the rear edge (1a) of a vehicle door and the edge (12b) adjacent to said vehicle body at least a first element (2) including an electromagnet (2a) integral with one (1a) of said edges and opposite said electromagnet at least a second element (7) including a magnetic material (7a) integral with the other edge (12b), one of said first (2) and second (7) elements being mobile towards the other element when the electromagnet (2a) is powered with an electric current, the ends opposite said elements (2, 7) being shaped to be mutually nested into each other.

Abstract: The invention relates to a device for securing the door leaves (1) of a multiple-leaf door system against unintentional deflection from the normal operating position. Said device comprises a lock (retaining device (HV) that is located in the vicinity of the ends of the door leaves (1) and is configured as a switching gear. The lock can be secured in the normal position by an integrated magnetic brake (MB).