EP3153647A1 - Method and device for actuating a door opener - Google Patents

Abstract

A device and a method are proposed for actuating a door handle of a door, wherein the door handle (3, 103) serves to open and close a lock (2) of the door equipped with a latch (4) and the door handle (3, 103) has a starting position and a deflected end position and the lock latch (4) has a closed position and an open position. The device is equipped with a drive (11, 71) whose driving force is transmitted to the door handle (3, 103) or the latch (4). The latch (4) is moved from the closed position to the open position. A switching device is coupled to the door handle. It interrupts the drive circuit when the door handle (3, 103) is in its home position and closes the drive circuit when the door handle (3, 103) is deflected from its home position.

Description

The invention relates to a device and a method for actuating a door handle.

Doors have a door leaf and a door frame. The door leaf forms the moving part of the door. Doors are equipped with a lock and a door handle. The lock has a latch that holds the door in place. The latch is in a closed position on the castle over to the outside and engages in a serving as a stop receptacle on a door frame or door lining. In an open position, the latch is moved into the lock and the door can be opened. For this purpose, the movably arranged on the door frame door leaf is moved into an open position. The latch is moved over the arranged on the door, in particular on the door leaf, door handle from the closed position to the open position. For this purpose, the door handle is deflected with a force from its initial position. This force is transferred to the lock latch via the mechanism of the lock. Among other things, this mechanism includes a square and a lock nut. Here, the lock nut is connected via the square with the door handle or door handles against rotation. A deflection of the door handle is transmitted via the square to the lock nut. about the further mechanism of the lock is transferred to the lock latch movement of the lock nut. In a fully deflected end position of the door handle, the latch is in the open position. In this open position, the door is no longer held against the stop. The door can thus be opened by a movement of the door leaf. As soon as the door handle is released and is no longer deflected by an externally acting force, it returns to its initial position, in which the latch is in the closed position. The latch is connected to a latch spring. The transition of the latch from the closed position to the open position, the latch spring is deflected. The spring force pushes the latch back to the closed position. After eliminating the force exerted on the door handle force, which ensures that the lock latch merges into the open position, the latch automatically returns to the closed position. The latch is often bevelled on the outside. When closing the door, the latch bolt is therefore pushed back by a strike plate in the door frame and compressed the latch spring. As soon as the latch engages in the recess of the striking plate, the latch spring pushes the latch again into the closed position, so that the door is held in the stop. Door handles used are, for example, door handles, door buckles, door handles, push rods, panic push rods, pressure plates and panic pressure plates. They are among the door fittings. Door handles can be located on one side of the door or on both sides of the door.

The force that must act on a door handle so that the latch can pass into the open position and the door can be opened depends on the door, in particular the door leaf, the gasket and the door frame. For some doors, this force is so great that the door can only be opened by strong people. In some areas, for example in public buildings, in tunnels and especially in doors that provide escape route, maximum limits are set for the force that is necessary to deflect the door handle from its initial position, so that the latch merges into the open position. Those through the door, the seal, The door frame, the door handle and the lock certain force that is necessary to move the latch to the open position, is on some doors above the maximum limit.

The invention has for its object to provide a device and a method for supporting the operation of a door handle available, with which the force can be reduced, which requires a person to deflect the door handle, so that the latch latch from the closed position to the open position passes.

This object is achieved by the device having the features of claim 1 and the method having the features of claim 16. The device is characterized in that it comprises a drive whose drive force is transmitted directly or indirectly to the door handle or the latch, wherein the latch is moved from the closed position to the open position. The driving force can also be transmitted to a component of the mechanism connecting the door handle with the lock latch of the castle, for example, on the square or the lock nut of the castle. The drive is triggered by means of a switching device which is at least partially coupled to the door handle. The switching device is integrated in the drive circuit. At least part of the switching device is directly or indirectly coupled to the door handle, so that a deflection of the door handle leads to a deflection of a part of the switching device or causes a different state change of the switching device. In the starting position of the door handle, the switching device interrupts the drive circuit. In this switching state, the drive circuit is interrupted and the drive is not powered. When the door handle is operated by a person, the switching device changes its switching state. In this switching state, the drive circuit is closed and supplies the drive with power. The driving force generated by the drive in this switching state ensures the transition of the latch from the closed position to the open position.

When the door handle is manually operated by a person, that person presses the door handle out of the home position and deflects the door handle. Even if the force with which the person presses the door handle, is not sufficient to move the door handle in the fully deflected end position, the force is sufficient in any case to deflect the door handle at least a small piece from the starting position or at least the after Press down the top surface of the door handle so that the door handle is no longer in the home position. This small deflection of the door handle or parts of the door handle is sufficient to change the switching state of the switching device and close the drive circuit, so that the drive is turned on and generates a driving force. The driving force of the drive is optionally transmitted via a power transmission device to the door handle, the latch or other component of the castle. The latch is moved to the open position. The person is thereby supported when pressing the door handle. There is a power assisted door handle operation.

The switching device reacts when operating the door handle as described above preferably on a change in position of the door handle, the square, the lock nut or a component coupled to the square. Alternatively, the switching device can respond to any other change in the state of the door handle, which results when a person touches the door handle.

When the door handle is no longer manually actuated, the drive or shifter, or possibly a power transmission, will cause the part to be released to which the drive force is transmitted or that the corresponding part be actively returned to the home position. The part to which the driving force is transmitted by the drive directly or by means of a power transmission device is the door handle, the latch or a door lock with the lock latch connecting component of the lock.

Door handle and latch are equipped with a spring that, when operated purely by hand, ensures that they return to their original position when the person leaves the door handle. Once the manual operation is completed and the driving force of the drive is no longer transferred to the door handle or the latch, the door handle and the lock latch return to their original positions. The starting position of the door handle is its starting position. The starting position of the latch is its closed position.

If the drive is a self-locking drive, special care is taken to ensure that the drive force is no longer transmitted to the latch as soon as the door handle is no longer manually operated. If the drive is not self-locking, the door handle automatically returns to its original position and the lock latch returns to its closed position without special care having to be taken.

The device ensures that a person is supported when pressing the door handle, so that the lock latch merges into an open position. The door is opened by pulling or pushing the door leaf then by the person or a separate device. If a further device is provided on the door which assists the person in transferring the door leaf from a door closed position into a door open position, then this further device can be linked to the device according to the invention. In particular, a common control can be provided.

The device can either be integrated in new doors or retrofitted with already installed doors. For new doors, all parts of the device can be integrated into the door. When already installed doors some parts of the device, in particular the drive outside of the door, especially on the door leaf can be placed.

The device can be arranged in particular on an escape door. In road tunnels and tunnels for train traffic, the escape routes and emergency exits through escape doors are separated from the traffic tunnel. Such doors can also be designed as a fire door. They ensure that in the event of a fire in the tunnel, the fire and smoke can not spread into a second tunnel serving as an escape route and / or emergency route.

According to an advantageous embodiment of the invention, the drive is an electric motor. Preferably, electric motors are used to generate a torque. However, linear drives can also be used. If the electric motor generates a torque, then this can also be converted by means of a screw drive into a linear force. Depending on the position at which the drive is arranged on the door, a linear force or a torque is better suited. If the drive is arranged directly on the lock or close to the lock, the torque can be transmitted substantially directly to the door handle or a rotatable component of the mechanism of the lock. On the other hand, if the drive is arranged at a greater distance from the lock or the door handle on the door, a linear force is better suited to actuate the door handle force-assisted.

According to a further advantageous embodiment of the invention, the drive is designed as a hollow shaft drive. Through a hollow shaft of the hollow shaft drive, a drive shaft is passed and driven by this for rotation. This drive shaft is taken against rotation in the nut of the castle and also connected to the door or the door handles. This drive shaft may have, at least in sections, a cross section which deviates from a circular shape, for example a rectangular, in particular a square shape. The drive shaft replaced in this case the square, which is usually passed through the nut of the lock and connected to the one or more door handles. The drive shaft in this case is longer than the normal square of the castle, since the hollow shaft drive and the drive shaft is placed and increases the axial length thus. On the drive shaft or the door handle are arranged against rotation. The switching device may be equipped with an incremental encoder in the case of a hollow shaft drive. The incremental encoder is preferably arranged on the door handle, the drive shaft or a rotation-driven part of the drive. The incremental encoder detects when the door handle, the drive shaft or a non-rotatably connected part with respect to its bypass rotates. The hollow shaft drive has the advantage that it has no self-locking, so that when eliminating a force acting on the door handle manual force of the door handle and the latch return to their original positions.

According to a further advantageous embodiment of the invention, the drive is a pneumatic or hydraulic drive.

According to a further advantageous embodiment of the invention, the drive is a servo drive. In this case, a control of the servo drive can be combined with the switching device.

According to a further advantageous embodiment of the invention, the device is equipped with a power transmission device which transmits the driving force of the drive directly or indirectly to the door handle, the latch, the lock nut, the square or any other component of the door handle with the lock latch connecting mechanism of the castle and thereby moves the lock latch from the closed position to the open position.

According to a further advantageous embodiment of the invention, the power transmission device on a rope. The one end of the rope is connected directly or indirectly to the drive, so that the driving force is transmitted to the rope. The other end of the rope is connected to the door handle, the latch or a component of the door handle with the lock latch connecting mechanism of the lock. The rope can be guided over one or more deflections. The rope has the advantage that the door handle can also be operated purely manually. Even if there is a power failure or the drive is defective, so the latch can be moved with the door handle alone by manual operation in the open position.

According to a further advantageous embodiment of the invention, the deflections for the rope are pulleys. Alternatively, the rope can also be guided over non-rotatable deflections.

According to a further advantageous embodiment of the invention, the power transmission device on a lever or a disc, which are attachable to a belonging to the mechanics of the castle square, which in turn is inserted into a nut of the castle. In turn, the rope can attack on this lever or disc. The disc may also be equipped with a lever or cam that projects radially outward beyond the edge of the disc. The rope can be attached to this lever or cam.

According to a further advantageous embodiment of the invention, the switching device is equipped with at least one switch. In the initial position of the door handle, the switch is open in the switching state in which the drive circuit is interrupted. When the door handle is deflected from its home position, the switch goes closed in the switching state and the drive circuit is closed.

According to a further advantageous embodiment of the invention, the switch is a proximity switch.

According to a further advantageous embodiment of the invention, the switching device comprises a pressure-sensitive protective device which can be attached to the door handle. Preferably, the pressure-sensitive protective device is on the upwardly facing surface or on a user facing and arranged away from the door leaf side of the door handle. The pressure-sensitive protective device responds to pressure that is manually exerted on the door handle. For example, this circuit closes a circuit assigned to the protective device. For this purpose, a contact chain, other contacts or electrical conductors can be arranged on the surface of the door handle. They are preferably covered so that they are protected from dirt and moisture. Based on the pressure-sensitive protection device can be determined whether a person continues to operate the door handle while the drive is switched on.

According to a further advantageous embodiment of the invention, the switching device is designed to interrupt the drive circuit when the door handle reaches the deflected end position and / or the latch reaches the open position. The drive is switched off. Shutting down the drive prevents the drive, possibly a power transmission device, the door handle or the lock from being damaged. The switching device may be equipped with a limit switch that shuts off the drive when the door handle reaches its deflected end position and / or the latch reaches its open position.

According to a further advantageous embodiment of the invention, the switching device is equipped with a controller. The controller controls the drive and the switching device ensures that the drive circuit is closed upon actuation of the door handle and the drive circuit is interrupted after completion of the operation and / or upon reaching the end position of the door handle or the open position of the latch. If necessary, the controller can also ensure that the door handle and the lock latch return to its original position or closed position after elimination of the operation of the door handle by a person.

According to a further advantageous embodiment of the invention, the switching device is equipped with a position sensor, which is a deflection the door handle or parts of the door handle detected from the starting position and outputs a signal to the control of the switching device. The position sensor can detect the position of the door handle only qualitatively and determine whether the door handle is in the starting position or not. Alternatively, the position sensor can detect the position of the door handle also quantitatively and determine at which position the door handle is relative to its initial position. The position of the door handle detected by the position transmitter is output by the position transmitter to the controller. The controller controls the switching device so that the drive circuit is closed or interrupted depending on the position of the door handle.

According to a further advantageous embodiment of the invention, the switching device is designed to close the drive circuit only as long as an operation of the door handle by a Peron lasts and to interrupt the drive circuit when the operation of the door handle is terminated by the person. The drive can thus be turned off as soon as a person no longer operates the door handle, regardless of whether at this time already the open position of the latch or the deflected end position of the door handle are reached. The switching device may be equipped with a switch or a position sensor with which it can be determined whether the person continues to operate the door handle even when the drive is switched on. A pressure-sensitive protective device is suitable for this purpose, for example.

According to a further advantageous embodiment of the invention, the controller is designed to leave the driving closed after closing the drive circuit by the switching device, until the door handle reaches the deflected end position and / or the latch is in the open position, regardless of whether the operation the door handle by a person already finished before. If the door handle was actuated by a person and the drive is turned on, then in this case, the lock latch by the drive to its open position moves, even if the person stops their operation of the door handle before reaching the open position.

According to a further advantageous embodiment of the invention, the device is equipped with an attachable to a door leaf of the door housing, in which the drive is arranged. The switching device can also be arranged in the housing, at least as far as it does not engage from the outside on the door handle or is arranged on the outside thereof. A power transmission device, if provided, can also be arranged in the housing. Thanks to this housing also already built into a building doors can be retrofitted with a device according to the invention. Preferably, the housing protects the drive from dust and moisture. If appropriate, this also applies to other components of the device which are arranged in the housing.

According to a further advantageous embodiment of the invention, the housing is designed to arrange the drive on the door leaf in the region of the door handle.

According to a further advantageous embodiment of the invention, the housing is designed to arrange the drive at the edge of the door. In particular, the housing can be arranged near the articulation of the door leaf of the door to a door frame of the door.

According to a further advantageous embodiment of the invention, the drive circuit is connected to a power grid.

According to a further advantageous embodiment of the invention, the device is integrated in a door.

According to a further advantageous embodiment of the invention, the device is designed to be subsequently arranged on a door.

The method with the features of claim 16 is characterized in that in a door with a door handle and a latch operated by the door latch, a drive with a drive circuit and a switching device assists a person in operating the door handle. It is detected whether the door handle is in its initial position in which the latch is in its closed position and the associated door is thus held in the stop. If the door handle is in its initial position, the drive circuit is interrupted and the drive is not supplied with power. This is ensured by the switching device. If the door handle is at least partially or partially deflected from its starting position, the drive circuit is closed via the switching device and the drive is supplied with power. The driving force generated by the drive is transmitted indirectly or directly to the latch. It can also be transmitted, for example, to the door handle or a component of the mechanism of the lock connecting the door handle with the lock latch. In this transfer of the driving force to the latch, the latch is moved to its open position and thus withdrawn from a stop of the door. Since in this open position of the latch the door is no longer held in the stop, the door leaf can be moved to the open position and the door can be opened with it. With the method according to the invention, the person thus receives assistance in the operation of a door handle, in which the latch of a lock is moved into the open position.

According to one embodiment of the method according to the invention, the drive circuit is interrupted by the switching device when the door handle reaches its deflected from the initial position end position or the latch is in its open position.

According to a further advantageous embodiment of the invention, the deflection of the door handle is detected from its initial position by means of a switch. The switch is mechanically coupled directly or indirectly to the door handle. The switch is in the starting position of the Door handle in a first switch position. If the door handle is deflected from its initial position, the switch is in a second switch position. The transition from the first to the second switch position is effected by a deflection of the door handle. The switch is part of the switching device. The switching device ensures that the drive circuit is interrupted in the first switch position of the switch and closed in the second switch position of the switch. By means of the mechanically coupled to the door handle switch, the position of the door handle with respect to its initial position can be detected qualitatively.

According to a further advantageous embodiment of the invention, the deflection of the door handle is detected from its initial position by means of a position sensor. This is indirectly or directly coupled to the door handle, so that a deflection of the door handle acts on the position sensor. By means of the position sensor, the position of the door handle can be determined not only quantitatively but also qualitatively. The position sensor is part of the switching device. This ensures that the drive circuit is interrupted or closed depending on the position of the door handle.

Further advantages and advantageous embodiments of the invention are the following description, the drawings and claims removed.

drawing

Figur 1

perspektivische Ansicht eines Ausschnitts aus eines Türblatts einer Tür mit Türdrücker und Schloss wobei der Türdrücker in Ausgangsstellung und eine Schlossfalle in Schließstellung sind,

Figur 2

Türblatt gemäß Figur 1 wobei der Türdrücker in ausgelenkter Endstellung und die Schlossfalle in Schließstellung sind,

Figur 3

erstes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 4

Scheibe der Vorrichtung gemäß Figur 3 in perspektivischer Darstellung,

Figur 5

Vorrichtung gemäß Figur 4 mit einem Gehäuse,

Figur 6

zweites Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 7

drittes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 8

viertes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 9

fünftes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 10

sechstes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung,

Figur 11

siebtes Ausführungsbeispiel einer Vorrichtung zur kraftunterstützten Türdrückerbetätigung.

In the drawings, embodiments of the invention are illustrated and described in more detail below. Show it:

FIG. 1

Perspective view of a detail of a door leaf of a door with lever handle and lock with the door handle in the initial position and a latch in the closed position,

FIG. 2

Door leaf according to FIG. 1 the door handle being in the deflected end position and the lock latch being in the closed position,

FIG. 3

First embodiment of a device for power assisted door handle operation,

FIG. 4

Disc of the device according to FIG. 3 in perspective,

FIG. 5

Device according to FIG. 4 with a housing,

FIG. 6

second embodiment of a device for power assisted door handle operation,

FIG. 7

third embodiment of a device for power assisted door handle operation,

FIG. 8

fourth embodiment of a device for power assisted door handle operation,

FIG. 9

fifth embodiment of a device for power-assisted door handle operation,

FIG. 10

sixth embodiment of a device for power assisted door handle operation,

FIG. 11

Seventh embodiment of a device for power assisted door handle operation.

Description of the embodiments

In FIG. 1 a detail of a door leaf 1 is shown, which is equipped with a lock 2 and two door handles 3. On each side of the door panel 1, a door handle 3 is arranged. Both door handles 3 are identical. They are designed as a doorknob. The lock 2 is a mortise lock. The lock 2 has a latch 4 and a latch 7. The latch 4 can be deflected by each of the two door handles 3. FIG. 1 shows the two door handle 3 in its initial position. In this initial position designed as a door handle door handle 3 are aligned substantially horizontally. If the door handles 3 are in their initial position, then the latch 4 projects outwardly beyond a housing 5 of the lock 2. In this position, the latch bolt 4 engage in a recess, not shown in the drawing, of a striking plate, a door frame, a door frame or a door lining. The lock 2 is further equipped with a lock cylinder 6, which can be operated via a key, not shown in the drawing. By means of the key, the latch 7 can be moved to additionally lock the door leaf 1 in a door frame, not shown. The door handle 3 forms together with a skirt 8 the door fitting.

FIG. 2 shows the door panel 1 according to FIG. 1 wherein the door handle 3 are in a deflected from the initial position end position. Furthermore, the lock latch 4 is in FIG. 2 in an open position in which it is retracted into the housing 5 of the lock 2. In this position, the latch bolt 4, the door panel 1 can be moved in an open position.

FIG. 3 shows a first embodiment of a device 10 for power assisted door handle operation. The device is equipped with a drive 11, which is designed as an electric motor for generating a driving force in the form of a torque. Furthermore, the device 10 has a power transmission device 12, which transmits the driving force of the drive 11 to the door handle 3. The power transmission device 12 is with a threaded drive 13, a cable 14 and a disc 15 equipped. The screw drive 13 converts the driving force of the drive 11 acting in the form of a torque into a linear movement. This is transmitted to the pulley 15 via the cable 14. The disc 15 is equipped with a lever 16 having a through hole 17 for attaching the cable 14. The lever can also be referred to as a cam. The disk 15 is additionally provided with an in FIG. 4 illustrated passage opening equipped with a square cross-section, which is arranged substantially in the center of the circular disc 15. Through this passage opening is a square of an in FIG. 1 and 2 shown passed lock. This square is not recognizable in the drawing. In this case, the passage opening of the disc 15 is adapted with respect to its cross section to the cross section of the square. The square has two opposite ends. Each of the two ends is inserted into one of the two door handles 3. A section in between is in an in FIG. 3 not shown lock nut added against rotation. In this way, the two door handle 3, the disc 15 and the lock nut of the castle are connected to each other against rotation. If, with the aid of the drive 11, a drive force is transmitted via the power transmission device 13 to the disk 15, which pulls the disk 15 downwards on the lever 16, this force results in a deflection of the door handle 3 due to the non-rotating connection between disk 15 and door handle 3 from his in FIG. 3 illustrated starting position. As already too FIG. 2 explained, the deflection of the door handle 3 leads in its deflected end position to a transition in FIG. 1 and 2 shown latch in its open position according to FIG. 2 , The drive 11 is switched on via a switching device 18. This has a proximity switch, which responds to a change in position of the lever 16. If the door handle 3 by a person not shown in the drawing manually from his in FIG. 3 deflected starting position shown, so the lever 16 moves away from the switching device 18. This change in position leads to the closing of an in FIG. 3 not shown drive circuit which supplies the drive 11 with power.

An in FIG. 3 not shown control ensures that the drive 11 is turned off when the door handle 3 reaches its deflected end position or the lock latch 4 in FIG. 2 shown opening position arrives.

FIG. 4 shows the disc 15 with the arranged on the disc lever 16 and the through hole 17 through which the cable 14 as in FIG. 3 shown can be passed. The disc 15 is formed with the exception of the lever 16 as a circular disc. In the middle of the disc 15 is provided with a square cross-section through opening 19. Through this passage opening 19 is an in FIG. 4 not shown square of the lock 2 passed. The passage opening is only slightly larger than the cross section of the square, so that the two parts can be connected to each other substantially free of play and rotation. The square of the lock is guided through the lock nut and the door handle or the door handle and connected to these rotation safe. As a result, a rotation of the door handle is transferred to the lock nut and from there to the lock latch.

FIG. 5 shows the device 10 according to FIG. 3 wherein the device 10 is equipped with a housing 110. The housing is arranged on the door leaf 1. On the housing, the enclosure 8 and the door handle 3 are arranged. In the housing, the drive 11, the power transmission device 12 with screw 13, rope 14 and disc 15 and the switching device 18 are arranged.

FIG. 6 shows a second embodiment 20 of a power assisted door handle operation. The embodiment is true with respect to the drive 11 and the power transmission device 12 with screw 13, rope 14, disc 15, lever 16 and through hole 17 with the embodiment of the device 10 according to FIG. 3 match. The only difference is the switching device, which is equipped with a pressure-sensitive protective device 28. This is arranged on the door handle 3. At a manual actuation of the door handle 3, a pressure is exerted on the pressure-sensitive protective device 28. In this case, integrated electrical conductors or contacts are combined in the pressure-sensitive protective device, so that a current can flow through them. So there is a change in position within the pressure-sensitive protective device. This in turn ensures that the switching device connected to the pressure-sensitive protective device closes the drive circuit and the drive 11 is supplied with power. The device 20 may also be provided with a housing 110, as in FIG FIG. 5 shown to be equipped.

FIG. 7 shows a third embodiment of a device 30 for power assisted door handle operation. The device 30 is consistent with the in the Figures 3 and 6 illustrated devices 10 and 20 with respect to the drive 11 match. The power transmission device 32 is also equipped with a screw 13 and has a cable 34 and a pulley 15 with lever 16. The disc 15 agrees with the in FIG. 4 represented disc. In contrast to the previous embodiments, however, the cable 34 is guided over deflection rollers 39. If the drive 11 is turned on, the screw drive 13 pulls the cable 34 down at its end assigned to it. This leads via the pulleys 39 to the fact that the lever 16 of the disc 15 is pulled upwards. Due to the non-rotating connection between the disc 15 and the door handle 3, this movement causes the door handle from his in FIG. 5 shown starting position is deflected down. This in turn ensures that the latch 4 passes from the closed position to the open position. In the FIG. 7 shown device can with a switching device 18 with proximity switch according to the device 10 in FIG. 3 or with a switching device with pressure sensitive protection device 28 according to device 20 in FIG. 6 be equipped. It may also be like the device 10 in FIG FIG. 5 be equipped with a arranged on the door panel 1 housing in which the drive 11, the screw 13, the cable 34, the pulleys 39 and the disc 15 are added. Alternatively, the device 30 may also be integrated in the door leaf 1.

FIG. 8 shows a fourth embodiment of a device 40 for power assisted door handle operation. As with the in FIG. 7 illustrated embodiment, the drive 11 and the power transmission device 42 are arranged above the door handle 3 in the device 40. In contrast to the device 30, the drive 11 and the screw 13 are not in the immediate vicinity of the door handle 3 but at the top of the door panel. The driving force of the drive 11 is transmitted to a cable 44, which is transmitted by a deflection roller 49 on a pulley 15 with lever 16. The deflection of the lever 46 and the corresponding deflection of the door handle 3 correspond to those of the embodiment in FIG. 7 , In the FIG. 8 shown device can with a switching device 18 with proximity switch according to the device 10 in FIG. 3 or with a switching device with pressure sensitive protection device 28 according to device 20 in FIG. 6 be equipped. In FIG. 8 In addition, a controller 111 and a power line 112 are shown. The power line 112 is guided from the door leaf 1 to the door frame 113 and connected there to a power grid. The power line 112 forms part of the drive circuit which supplies power to the drive 11.

In FIG. 9 a fifth embodiment of a device 50 for power assisted door handle operation is shown. The drive 11 and the screw 13 correspond to the previous embodiments. In contrast to the previous embodiments, however, the force of the drive 11 is transmitted via the screw 13 to a cable 54 which engages a designed as a panic pressure rod door handle 103. This panic push rod is in FIG. 10 fully illustrated. By the cable 54, the door handle 103 is pulled in the direction of the door panel 1, whereby the latch 4 passes into its open position. The cable 54 is guided over a deflection 59 and connected with its end facing away from the screw 13 with the door handle 103. The device 50 is provided with an in FIG. 9 not shown switching device with proximity switch according to the device 10 in FIG. 3 fitted. The proximity switch is in FIG. 9 also not shown. In addition, the device 50 may be equipped with a housing like the device 10 in FIG FIG. 5 , This housing is arranged on the door leaf and takes the drive 11, the screw 13, the cable 54 in sections and the deflection 59 on. The part of the cable 54, with which the cable 54 is attached to the door handle 103, protrudes from a housing.

FIG. 10 shows a sixth embodiment of a device 60 for power assisted door handle operation. The device is substantially in accordance with the device 50 according to FIG. 9 match. The only difference is in terms of the switching device. This is equipped with a pressure-sensitive protective device 68. This is corresponding to the pressure-sensitive protective device 28 in the device 20 in FIG. 6 educated. If the door handle 103 is pressed manually by a person down, so equipped with the pressure-sensitive protective device switching device ensures that the drive circuit, not shown in the drawing of the drive 11 is closed and the drive 11 is supplied with power. In this case, the screw 13 is pulled down. This movement is transmitted via the cable 54 to the door handle 103. As a result, the lock latch 4 is in the open position.

FIG. 11 shows a seventh embodiment of a device 70 for power assisted door handle operation. In contrast to the preceding embodiments, the device 70 has a drive 71, which is designed as a hollow shaft drive. The hollow shaft drive has a fixed part 71 a, which is fixedly connected to the door leaf 1. Furthermore, the hollow shaft drive 71 has a relative to the fixed part 71 a for rotation driven part 71 b. The power transmission device is equipped with a drive shaft 73 which has a square cross-section. The shaft is disposed in a through hole of the driven part 71 b against rotation. The shaft is beyond twisting in the two door handles 3 and in a lock nut 104 of the castle arranged. A rotation of the driven part 71 b of the hollow shaft drive is thus on the drive shaft 73 on the two door handle 3 and the lock nut 104 on the in FIG. 11 not shown lock latch transferred. The drive 71 thus supports the pressing of the door handle 3 and the movement of the lock latch from the closed position to the open position. The device 70 is equipped with a switching device having an incremental encoder. If one of the two door handles 3 by a person manually from the in FIG. 11 deflected shown starting position in which it is pressed down, this rotation of the door handle is transmitted via the drive shaft 73 to the driven part 71 b, on which the incremental encoder is arranged. The incremental encoder is not shown in the drawing. If the incremental encoder detects an angle change, the switching device closes the drive circuit of the drive designed as a hollow shaft drive and drives the driven part 71b to rotate.

All features of the invention may be essential to the invention both individually and in any combination with each other.

LIST OF REFERENCE NUMBERS

1

door leaf

2

lock

3

door handles

4

latch

5

Housing of the castle

6

lock cylinder

7

bars

8th

mount

9

10

Device for power-assisted door handle operation

11

drive

12

Power transmission device

13

screw

14

rope

15

disc

16

lever

17

Through opening

18

switching device

19

Through opening

20

Device for power-assisted door handle operation

28

Pressure-sensitive protective device

30

Device for power-assisted door handle operation

32

Power transmission device

34

rope

39

idler pulley

40

Device for power-assisted door handle operation

42

Power transmission device

44

rope

49

idler pulley

50

Device for power-assisted door handle operation

54

rope

59

redirection

60

Device for power-assisted door handle operation

68

pressure-sensitive protective device

70

Device for power-assisted door handle operation

71

drive

71a

fixed part of the hollow shaft drive

71b

driven part of the hollow shaft drive

73

drive shaft

103

door handles

104

lock follower

110

casing

111

control

112

power line

113

doorframe

Claims (19)

Device for actuating a door handle of a door, wherein the door handle (3, 103) is used to open and close a lock (2) of the door equipped with a latch (4) and the door handle (3, 103) has a starting position in which the lock catch (4) is in a closed position and protrudes outwards at the lock (2), and the door handle (3, 103) has an end position deflected out of the starting position, in which the lock catch (4) is in an open position and in the lock (2) is retracted,
with a drive (11, 71), the directly or indirectly on the door handle (3, 103) or the latch (4) transmitted driving force moves the latch (4) from the closed position to the open position, with a drive circuit through which the drive (11, 71) is powered,
with a switching device (18) which at least partially indirectly or directly to the door handle (3, 103) coupled interrupts the drive circuit when the door handle (3, 103) is in its initial position, and which closes the drive circuit when the door handle ( 3, 103) or parts of the door handle (3, 103) are deflected from the starting position. Apparatus according to claim 1, characterized in that the drive (11, 71) is an electric motor. Apparatus according to claim 1 or 2, characterized in that the drive (71) is a hollow shaft drive. Apparatus according to claim 1, characterized in that the drive (11, 71) is a pneumatic or hydraulic drive. Device according to one of the preceding claims, characterized in that the drive is a servo drive. Device according to one of the preceding claims, characterized in that it is equipped with a power transmission device (12, 42, 73), which the driving force of the drive (11, 71) directly or indirectly on the door handle (3, 103) or the latch ( 4) transfers while the latch (4) moves from the closed position to the open position. Apparatus according to claim 6, characterized in that the power transmission device (12, 42) has a cable (14, 44), whose one end directly or indirectly to the drive (11) and the other end to the door handle (3, 103), the latch (4) or a component of the door handle (3, 103) with the latch (4) connecting mechanism of the lock (2) can be coupled. Device according to one of the preceding claims, characterized in that the switching device (18) comprises a switch. Apparatus according to claim 8, characterized in that the switch is a proximity switch. Device according to one of the preceding claims, characterized in that the switching device is equipped with a pressure-sensitive protective device (28, 68). Device according to one of the preceding claims, characterized in that the switching device is designed to interrupt the drive circuit when the door handle (3, 103) reaches the deflected end position and / or the latch (4) is in the open position. Device according to one of the preceding claims, characterized in that the switching device comprises a controller (111). Apparatus according to claim 12, characterized in that the switching device comprises a position sensor which detects a deflection of the door handle (3, 103) or parts of the door handle from the starting position and outputs a signal to the controller. Device according to the preceding claims, characterized in that it is equipped with a on a door leaf (1) of the door attachable housing (110), in which the drive (11) is arranged. Door with a lock (2) and a door handle (3, 103), wherein the door handle (3, 103) for opening and closing of a lock latch (4) equipped lock (2) and the door handle (3, 103) a Has starting position in which the latch (4) is in a closed position and on the lock (2) protrudes outwards, and the door handle (3, 103) has a fully deflected end position in which the latch (4) in a Open position and is retracted into the lock (2),
characterized in that it is equipped with a device according to one of claims 1 to 14. Method for actuating a door handle of a door, wherein the door handle (3, 103) serves to open and close a lock (2) of the door equipped with a lock latch (4) and the door handle (3, 103) has a starting position, in which the latch (4) is in a closed position and protrudes outward on the lock (2), and the door handle (3, 103) has an end position deflected out of the starting position, in which the latch (4) is in an open position and is retracted into the lock (2), wherein a drive equipped with a drive circuit generates a driving force which, transferred to the door handle or the latch, moves the latch into its open position and the drive circuit is equipped with a switching device, characterized by the following method steps: Detecting whether the door handle (3, 103) is in its initial position or is deflected from the starting position at least in parts, Interrupting the drive circuit by means of the switching device (18) when the door handle (3, 103) is in its initial position, closing the drive circuit by means of the switching device (18) when the door handle (3, 103) at least in part from the in one the starting position is deflected and generating a driving force by means of the drive (11, 71), Transferring the driving force to the latch (4) and moving the latch (4) in the open position. A method according to claim 16, characterized in that the drive circuit is interrupted by the switching device (18) when the door handle (3, 103) is in its deflected end position and / or the latch (4) is in the open position. A method according to claim 16 or 17, characterized in that the deflection of the door handle (3, 103) is detected from its initial position by means of a switch. A method according to claim 16, 17 or 18, characterized in that the deflection of the door handle (3, 103) is detected from its initial position by means of a position sensor.

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