DOOR OPENER

Description

[0001] The invention relates to a door opener for a door having a door leaf pivotably mounted in a door frame, the door opener comprising: a base body; a door opener latch which is pivotally mounted in a base body from a closed position to an open position and back; a blocking element which is arranged to be movable from a locked position to a release position and back, wherein the blocking element in the locked position forms a stop for the door opener latch in the closed position in order to prevent the door opener latch from pivoting into the open position, and wherein the blocking element in the release position is displaced from the door opener latch to such an extent that the door opener latch can be pivoted from the closed position to the open position and back without any restriction of movement by the blocking element; and an actuator which is coupled to the blocking element for releasing or blocking the door opener latch.

[0002] Electrically operated door openers are well known. In these devices, a door strike latch, in the closed position, forms a locking stop for the deadbolt of a door lock, thus securely locking the door. These devices require a high power supply and therefore require a power pack that delivers a high current at all times. By releasing the door strike latch, it can pivot, thus removing the deadbolt stop. This allows the door to be pivoted. This is particularly useful for front doors of residential buildings, allowing visitors to gain remote access without having to displace the deadbolt of the door lock by operating a key.

[0003] Such a door opener is described, for example, in EP 3 156 565 A1. The locking stop for the door opener latch is formed by a pivoting lever that can be locked using a solenoid.

[0004] DE 20 2011 105 510 U1 shows a door opener with a movably mounted door opener latch, an electrically switchable locking device with an electric actuator, and a locking element controlled by the actuator, which interacts either directly with the door opener latch or indirectly via a lever-shaped switch. The actuator consists of an electric coil, a rotary armature, and a leaf spring. Energizing the electric coil pivots the rotary armature.

[0005] WO 2020 / 00041 A1 and WO 2020 / 00040 A1 show a door opener with an electric motor as the actuator. The actuator, by rotating an output shaft, moves a driver having a contour for pivoting a locking member adjacent to it. This allows the locking member to be pivoted from a release position to a locking position, which forms a stop for the door opener latch.

[0006] DE 10 2014 104 128 B4 discloses a tumbler for holding a door or window leaf in a closed position. The door strike latch is blocked by a lever, which is locked in the closed position with a pivoting armature. A motor is located below the lever, which directly acts on the armature via a linear push rod.

[0007] DE 11 2016 003 423 T5 discloses an electric door opener system in which an electric motor linearly displaces a blocking element for the pivotably mounted door opener latch via a drive shaft.

[0008] US 5,681,070 A discloses a motorized connection for operating a door opener. A voltage source controlled by a security code rotates a small electric motor when a corresponding security code is entered. The motor rotates a shaft, which engages a coil spring. This moves a locking cam. If a pawl on the locking cam disengages from the pawl on the locking lever, the striker holder can be tampered with by a user.

[0009] US 2012 006082 A1 discloses an electric lock comprising an outer door housing, a connector, an inner door housing, and a latch. The outer lock housing is arranged on an outer side of a door. The connector is connected to the outer door housing. The inner door housing is connected to the connector and arranged on an inner side of the door. The latch is connected to a latch holding unit of the connector. An actuator of the connector extends a guide block and a protruding block to connect the outer handle to the connector and thus open the door while the user enters a correct password into the electric lock. The door can also be opened with a matching key.The connector is insulated from the outer handle to prevent damage to the connector if a user does not have the correct key and password for the electric lock.

[0010] US 2012 / 198897 A1 discloses a drive device for an electric lock bolt, comprising a housing, a motor having a power output shaft connected to a drive shaft having an external thread at one part, a coil spring of unequal diameter having a cylindrical spiral in the center threaded to the drive shaft, and first and second conical spirals at its two ends that are not threaded to the drive shaft, and a lock bolt attached to the second conical spiral. The drive shaft is driven by a motor and rotated to transmit the rotational force to the cylindrical spiral. Rotational movement of the drive shaft is converted into linear movement of the coil spring of unequal diameter to move the lock bolt and thus change the locked and unlocked states of the locking device.

[0011] WO 2014 / 028332 A1 discloses a motorized inline lock drive that can be mounted in a lock housing to drive a sliding locking element between a locked and unlocked position. The lock drive includes a motor with a shaft and a worm gear attached thereto for driving a lock spring, which in turn drives the locking element. The sliding movement of the locking element is axially aligned with the motor axis to significantly reduce friction.

[0012] US 6 076 870 A discloses an electric door opener with a pivotable locking element for locking the electric door opener in the closed position. The locking element is pivoted between the locked and unlocked positions by an electric motor. A drive pin pivotally engages the locking element. The electric motor rotates a roll pin, which engages the threads of a spring mounted on the drive pin. Rotation of the electric motor compresses or expands the spring to move the drive pin axially and thereby pivot the locking element between the locked and unlocked positions. The locking element locks a laterally outwardly pivotable retaining arm, which forms a stop for a door opener latch.

[0013] Based on this, it is the object of the present invention to create an improved door opener.

[0014] The object is achieved with the door opener having the features of claim 1. Advantageous embodiments are described in the subclaims.

[0015] It is proposed that the actuator has a motor with a rotatable shaft having a worm thread and a spring element with two end sections. The spring element engages with the worm thread at its first end section in order to displace the spring element linearly to the direction of extension of the rotatable shaft of the motor by rotation of the worm thread. The spring element is coupled directly or indirectly to the blocking element at its second end section. This means that unlocking by releasing the blocking element or directly moving the blocking element is not brought about by a direct force application by the actuator. Rather, the spring element decouples the actuator from the blocking element or the unlocking mechanism located therebetween.

[0016] This has the advantage that less electrical energy is required to operate the actuator. This makes a battery-operated door opener possible, which can also be operated in battery mode for several years. Door openers with solenoid valves, on the other hand, can hardly be operated independently of a battery due to their high energy requirements. Door openers with a directly coupled electric motor also have high energy consumption, as the motor has to work against the blocking forces acting on the blocking element or an intermediate unlocking mechanism. This is the case, for example, if the door opener latch is subjected to force when locked due to pressure against the door, causing the door opener latch to press against the change or a blocking element. This means that the blocking element or the unlocking mechanism no longer moves smoothly due to force and friction. To unlock, these additional forces must be overcome by the electric motor.

[0017] With the help of the intermediate spring element, it is now possible to use the spring element as an energy store. The electric motor then only has to move the spring element linearly, without the electric motor having to apply increased force. The spring element is thus at least pre-tensioned and serves as an energy store, so that at the latest when the door opener latch is temporarily relieved, for example when pressure is released on the door, the blocking element is directly subjected to spring force and thus moved, or an unlocking mechanism is subjected to spring force, thus inducing a movement to indirectly unlock the blocking element. The blocking element is thus moved into a temporary position (lasting until a switch to a locked state immediately after an opening phase) or permanent position (lasting until a change of state).This can be a temporary open state for immediate opening after the door is released, or a permanently open state for opening the door at any time. It can also be a temporary closed state (locked state) or a permanently closed state. In the respective open or closed state, the blocking element is moved to the corresponding position and remains there without the need for operation of the actuator in the end position. The actuator therefore only needs to be operated briefly to move the spring element and thus apply a spring force that brings the blocking element into the desired position.

[0018] This provides a compact and simple way of operating the door opener either in open mode or in closed mode without constant energy consumption. In open mode, the door opener latch is not blocked by the blocking element and can be pivoted freely. To do this, the electric motor only needs to be operated for the time in which the spring element is pre-tensioned or moved away from the electric motor so that the blocking element can move into the release position. In open mode, no further operation of the electric motor and therefore no further energy consumption is required. In closed mode, the door opener latch is blocked in the locked position by the blocking element. To do this, the electric motor only needs to be operated for the time in which the spring element is relaxed oris moved toward the electric motor so that the blocking element can move into the locked position, allowing the door to be used freely. In closed mode, no further operation of the electric motor is required, and therefore no further energy consumption is required. Open mode is advantageous, for example, for fire protection compartments and escape doors.

[0019] The blocking element is mounted in a base body for linear displacement, with the second end section of the spring element connected to the blocking element to move the blocking element from the locked position to the released position and back. Mounting on the base body also refers to mounting "in" the base body. This allows the blocking element to be used directly as a stop for the door opener latch. Linear displacement of the blocking element (e.g., a cuboid-shaped body) can remove the stop, allowing the door opener latch to pivot freely. The at least one linearly displaceable blocking element enables a very simple and compact design.

[0020] The actuator can have a linearly movable plunger, which is arranged, for example, to act on the blocking element in order to displace the blocking element from the locked position to the released position when the plunger moves toward the blocking element. The plunger can be connected to the second end region of the spring element. The plunger allows for a very compact and reliable actuation.

[0021] The plunger is preferably guided in a rotationally fixed manner. This reduces friction losses and ensures reliable linear movement into an actuated position and return to an initial rest position.

[0022] The spring element can be disengaged from the worm gear in two end positions and can no longer be displaced by the worm gear as the rotation of the worm gear continues. This allows the actuator, e.g., an electric motor, to rotate freely in the end positions. This reduces energy consumption and reduces the effort required for calibration. A control system for the actuator does not need to be trained to stop in the end positions. It is only necessary to ensure that the actuator is activated for a sufficient time to safely reach the other end position from one end position.

[0023] The door opener can have a door sensor that monitors the presence of the door lock latch. This door sensor can be located next to the door opener latch and interact with the latch. This can be done using a button (microswitch), for example, which is actuated via a pivoting plate or a plunger, to which the latch exerts a force when the latch is positioned behind the door opener latch and locked with the door opener.

[0024] The door sensor can be used for status detection to signal to a monitoring unit whether the door is closed, i.e. whether the lock latch is locked by the door opener latch or not.

[0025] The door sensor can also be used to control the door opener or actuator to trigger a change of state. When an opening signal is sent to the electric motor to open the door, which is used to move the blocking element from the closed position to the open position, the spring element is pre-tensioned by the operation of the electric motor. However, the blocking element can remain in the blocked closed position as long as a force is exerted on the door opener latch via the door, e.g., through the door seals. The user can then release the blocking element by briefly pushing or pulling on the door, causing it to move to the open position. If the time until the electric motor automatically returns to the closed position is too short, the user may miss the open period and have to request release of the door opener again.However, if the period is too long and the door is closed again when opened immediately while the door opener is still in the open position, the forces acting on the door opener latch cannot ensure that the door opener latch with the blocking element actually reaches the locked closed position.

[0026] With the help of the door sensor, it is now possible to trigger the state change when, after the transition to the open position, the door sensor has detected that the lock latch is no longer activating the door sensor and the door has thus been opened. This allows the transition to the closed state to take place at an early point in time so that the closed state is reached before the door is closed again and the lock latch falls into the relocked door opener latch. A time specification for the state change is therefore not absolutely necessary. However, it can be provided to set a maximum time after which a state change from the open to the closed state is guaranteed, even if the door that was temporarily released for opening was not opened in the end.

[0027] The invention is explained in more detail below using exemplary embodiments with the accompanying drawings. They show: Figure 1- Top view of a door opener not according to the invention in the closed position; Figure 2- Door opener made of Figure 1 in the open position; Figure 3- Partial sectional view of the door opener from Figure 2 with a view of the spring element with plunger, Figure 4- Partial sectional view of the door opener from Figure 2 with a view of the spring element with plunger; Figure 5- Side sectional view of the door opener from Figure 1 in the closed position with section in the area of ​​section line AA; Figure 6- Partial sectional view of the door opener from Figure 1 with section along the section line BB; Figure 7- Side view of the opened door opener from Figure 2 ; Figure 8- Side view of the opened door opener from Figure 2 in section AA; Figure 9- Side view of the opened door opener from Figure 2 in section BB; Figure 10a)- Sectional view through the electric motor with worm thread, spring element and plunger in the rest position; Figure 10b)- Sectional view from Figure 10a) with plunger in the unlocking position; Figure 11- Sketch of an embodiment of the door opener according to the invention with linearly displaceable blocking element in the closed position; Figure 12- Top view of the door opener from Figure 11 in the unlocked open position; Figure 13- Top view of the door opener from Figure 12 with the open position with the door opener latch now pivoted; Figure 14- Side sectional view of another embodiment of a door opener according to the invention in the closed position; Figure 15- Side view of the door opener from Figure 14 in the closed position; Figure 16- Front view of the door opener from Figure 14 in the closed position with blocked door opener latch; Figure 17- Partial sectional view of the front view of the door opener from Figure 16 in the closed position with the door opener latch blocked; Figure 18- Partial sectional view of a top view of the door opener from Figure 16in the closed position with blocked door opener latch; Figure 19- Side sectional view of the door opener from Figure 14 in the open position; Figure 20- Side view of the door opener from Figure 19 in the open position; Figure 21- Front view of the door opener from Figure 19 in the open position with blocked door opener latch; Figure 22- Partial sectional view of the front view of the door opener from Figure 21 in the open position with the door opener latch blocked; Figure 23- Partial sectional view of a top view of the door opener from Figure 21 in the open position with the door opener latch blocked.

[0028] Figure 1shows a plan view of a door opener 1 in an embodiment not according to the invention. The door opener 1 has a base body 2, which may, for example, have a metal housing. Several movably arranged functional elements are built into this base body 2. To lock the door bolt of a door, a door opener latch 3 (also called a pivot bolt) is arranged pivotably about the pivot axis S1, which extends horizontally in the illustration.

[0029] Furthermore, an unlocking mechanism is provided, which comprises a lever 4. This lever 4 is pivotally mounted about the axis S2 in the base body 2. In the illustrated closed position of the door opener latch 3, the lever 4 forms a stop for the door opener latch 3 and causes the door opener latch 3 to pivot from the closed position into the open position.

[0030] It can thus be seen that there is a positive connection between the change 4 pivoted into the locking position shown and the door opener latch 3 in the closed position.

[0031] It can be seen that the change 4 is under spring tension by means of a first pre-tension spring element 5, which brings the change 4 into the locking position shown when the change 4 can move freely.

[0032] The unlocking mechanism further comprises a locking member 6 pivotably connected to the base body 2. This locking member is mounted on the base body 2 pivotably about the pivot axis S3 in order to move from the locking position shown to the left into a release position against the force of a second pre-tension spring element 7.

[0033] It can be seen that a plunger 8 acts on an actuating surface of the locking member 6 and can come into contact with it. This plunger 8 is linearly displaceable in the horizontal direction in the illustration in Figure 1 movable from left to right and back.

[0034] The plunger 8 can be mounted in a rotationally fixed manner to prevent rotation during the linear movement. However, this is only optional. For this purpose, the plunger 8 can, for example, have a groove 9 into which a fixing pin engages, so that, through positive engagement, rotation of the plunger 8 about the axis in its direction of extension, i.e., about the axis S4 indicated by the dashed line, can be prevented during displacement of the plunger 8 in the linear direction.

[0035] It is clear that the locking member 6 has a locking latch contour, for example, formed by a bay-like recess, e.g., by protruding stop surfaces or the like, in order to form a stop for the change 4 in the locked position. The locking member 6 thus engages, for example, with its locking latch contour, over the free end of the change 4 in order to form a positive connection for the change 4 and hold it in the locked position. Pivoting of the change 4 is thus prevented in the locked position of the locking member 6.

[0036] The change 4 and the locking member 6 are spring-loaded by the first pre-tension spring element 5 and the second pre-tension spring element 7, which moves the change 4 into the locked position and the locking member 6 into the arrested position. In this way, a permanent position is impressed, for example in permanently closed operation (locked position of the blocking element), in which the door opener 1 automatically secures the door opener latch 3 in the closed position when the plunger 8 is retracted and thus securely closes the door. This permanently closed operation and, accordingly, with an inverse arrangement of the springs, a permanently open operation (release position of the blocking element) can be guaranteed to improve failure safety if a retracted plunger 8 is ensured even in the event of an actuator failure. An impending failure can, for example, be prevented by an emergency energy storage device, such as aa capacitor, or by monitoring the remaining available energy of the battery.

[0037] The linear movement of the plunger 8 is achieved by an actuator (not shown), e.g., in the form of an electric motor, which can be driven via an electrical line 11 and a control unit (not shown). It is also conceivable, however, that a battery could be housed in or on the base body 2, for example, using a battery compartment, possibly with additional control electronics.

[0038] The control electronics can be integrated into a battery-operated control unit (e.g. a reader) located next to a door. This control unit has a keypad for PIN code entry, a radio unit for transponder or smartphone queries (e.g. via RFID, NFC, Bluetooth, ZigBee, Wi-Fi, etc.), and / or a biometric input unit (e.g. iris or fingerprint). The control unit's battery can be used to control the door opener actuator. The status signal detected by the door opener's door sensor (door open when the lock latch is not in the door opener latch, or door closed when the lock latch is locked by the door opener latch) can be forwarded to the control unit and from there to a control center (event signal). The event can be transmitted from the control center or from another release point via the control center orAn opening signal can be transmitted directly via the control unit to the door opener to activate the actuator and move the blocking element into the open position (opening signal).

[0039] Figure 2 shows the door opener 1 not according to the invention from Figure 1 now with the pivoted door opener latch 3 in the open position. It can be seen that the door opener latch 3 can be arranged on the base body 2 using adjusting screws 12a, 12b so that the contact pressure of a door in the closed position can be adjusted with the door opener latch when the door opener latch is in positive engagement with the door bolt.

[0040] It can be seen that the change 4, in the open position shown, has now been pivoted away from the door opener latch 3 into the release position. The change 4 is pivoted clockwise about the pivot axis S2 against the spring force of the first preload spring element 5. This is possible because the locking member 6 is now pivoted away from the change 4 about its pivot axis S3 in a counterclockwise direction, i.e. in the opposite direction to the pivoting direction of the change 4. This pivoting movement of the locking member 6 from the locked position to the release position is effected by the plunger 8, which has been displaced linearly towards the locking member 6 by the actuator.

[0041] The linear movement of the plunger 8 thus unlocks the locking member 6 and the door opener 1, so that a door coupled to the door opener 1 can be opened.

[0042] Next to the door opener latch 3 is a door sensor 29, which monitors the presence of the door lock latch in the locked position behind the door opener latch 3. This can be a button (e.g., a micro switch) arranged in the interior (not visible) and positioned behind the illustrated plate or a plunger. When the door lock latch rests on the plate or plunger, the force exerted on it displaces it and actuates the button located behind it. The button and the interacting plate or plunger can be returned to their initial position by a spring, which is reached when the door lock latch is absent. The door sensor 29 can be used to signal the closed or open state of the door, depending on the presence of the door lock latch.It can also be used to switch the door opener 1 from the open position to the closed position as soon as the absence of the door lock latch has been detected after an opening operation.

[0043] Figure 3 shows the door opener 1 not according to the invention from Figure 1in partial section in the closed position of the door opener latch 3. It can be seen that the plunger 8 is coupled to an actuator spring element 13. For this purpose, the second end region 14a of the actuator spring element 13 is firmly connected to the plunger 8. For example, the actuator spring element 13 can be wound with the windings on the second end region 14a around the outer circumference of the plunger 8, where it forms a frictional and positive connection with the plunger 8. The actuator spring element 13 is in engagement with its first end region 14b in a worm thread 15, which is arranged on the drive axis 16 of a non-visible actuator. The worm thread 15 is arranged so as to be rotatable about the axis S4.

[0044] In the illustrated locking position of the locking member 6, the first end region 14b is away from the locking member 6 in the direction of the actuator (in Figure 3to the right). This is achieved by guiding spring connections of the first end region 14b of the actuator spring element 13 on the worm thread and thus displacing them linearly in the direction of extension of the axis S4.

[0045] Figure 4 shows a view of the door opener 1 not according to the invention in partial section now in the open position of the door opener latch 3 according to the illustration from Figure 2 . It can now be seen that the first end section of the actuator spring element 13 is displaced horizontally to the left on the worm thread 15. As a result, the opposite second end section 14a of the actuator spring element 13 with the tappet 8 connected to it is also displaced linearly in the direction of the locking member 6. With the aid of the spring force of the actuator spring element 13, the locking member is moved about its pivot axis S2 against the force of the second preload element 7 from its locking position. Figure 3pivoted into the release position now shown. This releases the positive engagement with the latch 4, so that the latch 4 is pivoted upwards away from the latch 3 by a force acting on the latch 3, against the spring force of the first preload spring element 5.

[0046] Figure 5 shows a side sectional view of the door opener 1 not according to the invention from Figure 1 in the section AA sketched there. It can be seen that the door opener latch 3, in the illustrated closed position, is aligned approximately parallel to the side wall in which the door opener latch 3 is pivotally arranged and protrudes therefrom.

[0047] It can also be seen that the second preload spring element 7 exerts a spring preload in the direction of view on the locking member 6, which is engaged with the change 4. The locking member 6 thus engages the change 4.

[0048] In the illustrated embodiment, the locking member 6 is L-shaped and has an actuating section 17 pointing away from the door opener latch 3. The plunger 8 can thus act on the locking member 6 in an area arranged next to the change 4.

[0049] It is also clear that the base body 2 can be closed with a cover element 18, which can be mounted above the pivoting door opener latch 3 on the side of the door opener latch 3. This cover element 18 is shown in the partially opened illustrations of the Figures 1 to 4 not present, ie it was taken from these representations.

[0050] Figure 6 shows a side sectional view in section BB of the door opener 1 not according to the invention from Figure 1in the closed position. It is clear that the lever 4 forms a stop for the door opener latch 3, which is pivotally mounted about the pivot axis S1, in that the lever 4 is pivoted towards the door opener latch 3.

[0051] Next to the change 4, the actuator 20 is arranged with an actuator housing 21, in which the actuator spring element 13, the plunger 8, and the worm gear 15 with the electric motor are accommodated. It can be seen that the actuator housing 21 has an opening with grooves 22 in which the plunger 8 can be guided in a rotationally fixed manner. For this purpose, the plunger 8 can have projections that engage in these grooves 22. However, the reverse solution is also conceivable, in which the plunger 8 has at least one groove into which a projection engages for rotationally fixed guidance.

[0052] Figure 7 shows a side view of the door opener 1 not according to the invention in the open position Figure 2. It can be seen that the door opener latch 3 now rotates around the axis S1, in the direction of Figure 7 counterclockwise, by 90°. The door striker latch 3 is then in the open position and releases a previous stop for a door bolt of a door lock. The door can then be opened by pivoting it.

[0053] Figure 8 shows the door opener 1 not according to the invention from Figure 7 in the open position in section AA. It can be seen that the change 4 has now been pivoted upwards away from the door opener latch 3. This is possible because the locking member 6 is now in the direction of view of the Figure 8 has been pivoted towards the viewer and has released the stop for the change 4. This is achieved by linear displacement of the plunger 8, which acts on the actuating surface 17 of the locking member 6.

[0054] Figure 9 shows the door opener 1 not according to the invention from Figure 2in the open position in section BB. This makes it even clearer that the door striker latch 3 has been pivoted 90° around its pivot axis S1. The switch 4 is pivoted upwards away from the door striker latch 3, so that the door striker latch 3 can be pivoted from the closed position to the open position and back without any restriction of movement by the switch 4.

[0055] The actuator 20 is accommodated in the remaining free space in the base body 2 in such a way that the movement of the door opener latch 3 is not impaired by the actuator housing 21.

[0056] The basic structure of the actuator 20 is exemplified with the Figures 10a) and 10b ) explains. Figure 10a) the actuator 20 in the rest position, in which the plunger 8 is fully or largely retracted into the actuator housing 21. This is achieved by the first end section 14b of the actuator spring element 13 being displaced linearly to the right in relation to the electric motor 23. This takes place by the drive shaft 16 of the electric motor 23 causing the worm thread 15 to rotate by activating the electric motor 23. As a result, the spring coils in engagement with the worm thread 15 at the first end region 14b are displaced linearly towards the electric motor 23 and the actuator spring element 13 is relaxed towards the second end region 14a with the plunger 8. The plunger 8 is thus displaced linearly into its rest position towards the electric motor 23.

[0057] In the illustrated embodiment, it can be seen that the plunger 8 has a groove 9 into which a guide pin 24 engages. Thus, the plunger 8 is mounted on the actuator housing 21 in a rotationally fixed manner, but still displaceable from left to right in the viewing direction.

[0058] Figure 10b ) shows the actuator 20 now in the unlocked position. There, the plunger 8 is pushed linearly out of the actuator housing 21. The rest position and the unlocked position, with their end positions, can be predetermined by the length of the groove 9 and the guide pin 24.

[0059] It can be seen that in the illustrated end positions, the first end section 14b of the actuator spring element 13 is disengaged from the worm thread 15, so that the worm thread 15 can rotate freely when the electric motor 23 rotates. This requires only a sufficiently long activation of the electric motor 23 to at least reach the end position. The electric motor 23 can then continue to rotate in freewheel mode without requiring significant energy and force. This eliminates the need for complex calibration for the activation phase of the electric motor 23.

[0060] In the unlocking position shown, the first end section 14b is shifted linearly to the left on the worm thread 15, in which the spring coils engaging with the worm thread 15, which form a positive connection with the thread of the worm thread 15, are shifted linearly on the threads.

[0061] Figure 11 shows a partial sectional view of an embodiment of a door opener 1 according to the invention. Again, a door opener latch 3 is pivotally mounted on a base housing 2. In this embodiment, a blocking element 30 is linear along the axis S4, ie in the direction of view of the Figure 11 horizontally movable from left to right, arranged on the base housing 2.

[0062] In the illustrated closed position, the blocking element 30 forms a stop for the closed door opener latch 3. The blocking element 30 can be connected directly or (not shown) indirectly to the plunger 8 of the actuator 20. The plunger 8 is in the rest position and is in turn indirectly coupled to the electric motor 23 via the actuator spring element 13. In this regard, reference is made to the illustrations in Figure 10a) and 10b ).

[0063] Figure 12 shows a partial sectional view of the door opener 1 according to the invention from Figure 11 now in the unlocked position of the blocking element 30. The blocking element 30 is now displaced away from the positive stop position with the door opener latch 3 by the linear displacement of the plunger 8. This is achieved by rotating the worm thread 15, which linearly displaces the drive spring element 13 and thus the plunger 8.

[0064] In the event that the actuator spring element 13 has been brought into the unlocking position shown, but the blocking element 30 is still subjected to a force by the door opener latch 3 due to the positive locking, this can still occur in the locking position of the Figure 11However, as soon as contact pressure is temporarily no longer exerted on the blocking element 30, the blocking element 30, which is mounted in a linearly displaceable manner in the base housing 2, can be moved into the unlocking position by the force of the actuator spring element 13. The actuator spring element 13 thus serves as a force accumulator.

[0065] Figure 13 now shows the door opener 1 from Figure 12 in the open position of the door opener latch 3, which is now rotated 90° from the closed position in Figure 11 and 12 was pivoted into its open position. This is possible because the blocking element 30 is guided out of the movement area of ​​the door opener latch 3.

[0066] In this embodiment, a door sensor 29 may also be present. In this regard, reference is made to the description of Figure 2 referred to.

[0067] Figure 14shows a side sectional view of another embodiment of a door opener 1 according to the invention in the closed position. It can be seen that the door opener latch 3 projects to the right into the forwardly open receiving area for a lock latch (not shown) in order to form a stop for the lock latch. The door opener latch 3 is arranged at one end of a latch pivot arm 25, e.g., to form an integral metal part. The latch pivot arm 25 is mounted on this pivot axis S5 so as to be pivotable about this pivot axis S5. Preferably, two latch pivot arms 25 are provided next to one another in the viewing direction and are mounted together on the pivot axis S5.

[0068] A latch return spring 26 is connected to the latch pivot arm 25 and is designed so that the spring force pivots the door opener latch 3 into the closed position shown.

[0069] A blocking element 30 is arranged in the base body 2 so that it can be linearly displaced by an actuator 20, such that the blocking element 30 forms a stop for the latch pivot arm 25 in the closed position. It can be seen that the blocking element 30 is positioned to the left behind the latch pivot arm 25 in order to prevent the latch pivot arm 25 from pivoting (counterclockwise in the view) toward the rear wall of the base body 2, which is opposite the open receiving area. This prevents the door opener latch 3 from being moved into the open position.

[0070] Figure 15 shows the side view of the door opener 1 from Figure 14 in the closed position. It can be seen that the door strike latch 3 protrudes slightly from the front of the open receiving area. However, this is optional and not mandatory. Also visible is the pivot axis S5 for the latch pivot arm 25.

[0071] Figure 16omits a front view of the door opener 1 Figure 14 in the closed position with the door opener latch 3 blocked. It is clear that there are two latch pivot arms 25 spaced apart from one another, each of which is integrally connected at its end to the door opener latch 3. The door opener latch 3 extends between the two latch pivot arms 25 at a distance from the pivot axis S5, on which the latch pivot arms 25 are pivotally mounted. A lock bolt can thus engage under the door opener latch 3, so that the door opener latch 3 forms a stop for the lock bolt.

[0072] In the illustrated embodiment, a torsion spring (also called a torsion spring) is arranged on the pivot axis S5 to form the latch return spring 26. The latch return spring 26 is positively connected to a corresponding latch pivot arm 25 by a spring arm, so that the latter is pivoted into the closed position by the spring force. Optionally, multiple latch return springs 26 can be provided, e.g., another torsion spring connected to the other latch pivot arm 25.

[0073] An actuator 20 is arranged in the interior of the base body 2. In this case, for example, the Figure 10 The actuator 20 is connected to a carriage 27, which carries the blocking element 30 on at least one side. By a linear movement of the carriage 27 (in the direction of view of the Figure 16in the horizontal direction), the blocking element 30 can be brought into a position behind the associated latch pivot arm 25 in order to form a stop preventing pivoting into the open position, or to be moved out of the range of movement of the associated latch pivot arm 25.

[0074] Figure 17 shows a partial sectional view of the front view of the door opener 1 from Figure 16in the closed position with the door opener latch 3 blocked. The exemplary structure of the actuator 20 can be seen more clearly. The actuator 20 has an electric motor that drives a drive shaft with a worm thread 15. A first end region 14b of an actuator spring element 13 is in positive engagement with the worm thread 15 in order to be displaced horizontally during its rotation. During the movement (to the left in the direction of view shown), the actuator spring element 13 is tensioned and exerts a force on the slide head part 28 of the slide 27, which is coupled to the second end region 14a of the actuator spring element 13. The slide head part 28 can, for example, dip with a projection into the interior of the actuator spring element 13, which in this way encloses the slide head part 28 in the front section.The actuator spring element 13, tensioned by the spring force, now exerts a force via the slide head part 28 onto the slide 17, by means of which the slide 27 with its at least one blocking element 30 is displaced linearly as soon as the force exerted by a lock bolt via the door opener latch 3 onto the latch pivot arms 25 and the blocking elements 30 adjacent thereto is less than the spring force of the actuator spring element 13. When the actuator spring element 13 is pretensioned to open the door opener latch 3, the linear movement of the blocking elements 30 is prepared to enable the door opener latch 3 to pivot into the open position. The linear movement requires a moment in which the door opener latch 3 is relieved, i.e. in which no pressure is being exerted on the door locked with the lock bolt.

[0075] As soon as the stop is released by moving the blocking elements 30 out of the movement space of the latch pivot axes 25, the door opener latch 3 can be pivoted into the open position against the spring force of the latch return spring 26. This can be achieved by pivoting open a door in the locked state with the lock bolt protruding. The lock bolt exerts a force on the now freely movable door opener latch 3, causing the door opener latch 3 to move into the open position. After the door has been opened, the door opener latch 3 pivots back into the closed position due to the force of the latch return spring 26. When the door is closed, the lock bolt can be pushed back in the usual way by an inclined surface facing the door opener 1 when it hits the door opener latch 3, which is in the closed position, in order to be guided past the door opener latch 3.After overcoming the door opener latch 3, the lock bolt snaps out again to engage under the door opener latch 3.

[0076] Figure 18 shows a partial sectional view of a top view of the door opener from Figure 16 in the closed position with the door opener latch 3 blocked. It is now clear that the blocking elements 30 are positioned in the pivoting space of the associated latch pivot arms 25 to form a stop for the latch pivot arms 25. This prevents the latch pivot arms 25 with the door opener latch 3 from pivoting into the open position.

[0077] Figure 19 omits a side sectional view of the door opener 1 Figure 14in the open position. It is clear that the latch pivot arms 25 are now pivoted (counterclockwise in the view) towards the rear of the base body 2. In the process, the door opener latch 3 is moved away from the front open receiving space of the base body 2 in order to clear the way for a lock bolt to move upwards. In the sectional view, the blocking element 30 for the visible latch pivot arm 25 is located in the front cut-away area in the viewing direction, so that the blocking element is not visible. However, it can be seen that the carriage 27, at the end of which the blocking element 30 is arranged, is guided between the rear of the base body 2 and the latch pivot arm 25. The carriage 25 is moved linearly - in the view of the Figure 19 in the direction of view - by the actuator 20.

[0078] Also visible is the latch return spring 26, which is mounted on the latch pivot axis S5 and is suspended by a spring arm in a lateral groove of the corresponding latch pivot arm 25. This creates the positive connection between the latch pivot arm 25 and the latch return spring 26.

[0079] Figure 20 shows the side view of the door opener 1 from Figure 19 in the open position. The base body 2 with the latch pivot axis S5 is visible. In the open position, the door opener latch 3 is pivoted toward the rear of the base body 2 and is therefore no longer visible.

[0080] Figure 21 shows a front view of the door opener 1 from Figure 19in the open position with the door opener latch 3 blocked. It can be seen that the blocking elements 30 arranged on the carriage 27 are now moved linearly (to the left in the view). The blocking elements 30 are thus positioned laterally next to the pivoting range of the associated latch pivot arms 25, so that the latch pivot arms 25 can now pivot freely – against the force of the latch return spring 26.

[0081] Figure 22 shows a partial sectional view of the front view of the door opener 1 from Figure 21 in the open position with blocked door opener latch 3. For the construction of the actuator, refer to the explanations Figure 10 and 17It can be seen that the first end region 14b of the actuator spring element 13 on the worm thread 15 is moved linearly along the drive axis 16 away from the electric motor by its rotation. The actuator spring element 13, designed as a compression spring, presses the slide head part 28 connected to the second end region 14a away from the electric motor through its spring force and moves the slide 27 linearly such that the blocking elements 30 connected thereto move out of the pivoting range of the latch pivot arms 25.

[0082] Figure 23 shows a partial sectional view of a top view of the door opener 1 from Figure 21 in the open position with blocked door opener latch 3. In this case, the explanations to Figure 18It is clear that the blocking elements 30 are positioned laterally next to the associated latch pivot arms 25. The latch pivot arms 25 are now pivoted into the pivoting space thus released, into the open position toward the rear of the base body. List of reference symbols

[0083] 1 Door opener 2 Base body 3 Door opener latch 4 Changeover 5 Preload spring element 6 Locking element 7 Second preload spring element 8 Plunger 9 Groove 11 Electrical cable 12a, 12b Adjusting screws 13 Actuator spring element 14a Second end section 14 First end section 15 Worm thread 16 Drive shaft 17 Actuating section / actuating surface 18 Cover element 20 Actuator 21 Actuator housing 22 Grooves 23 Electric motor 24 Guide pin 25 Latch pivot arm 26 Latch return spring 27 Slide 28 Slide head section 29 Door sensor 30 Blocking element S1 Pivoting axis S2 Axis for changeover S3 Pivoting axis S4 Axis S5 Pivoting axis for latch pivot arm

Claims

1. A door opener (1) for a door having a wing pivotally mounted to a door frame, said door opener (1) comprising: - a main body (2); - a door opener latch (3) hingedly mounted in the main body (2) and pivotable between a closed position and an open position; - a blocking member (4, 30) that is displaceable from a locking position into a release position and back, the blocking member (30) in its locking position forming a stop for the door opener latch (3) in the closed position to prevent pivoting of the door opener latch (3) into the open position, and the blocking member (30) in its release position being so far offset from the door opener latch (3) that the door opener latch (3) may be pivoted from the closed position to the open position and back without any restriction of movement by the blocking member (30); and - an actuator (20) coupled with the blocking member (30) for releasing or locking the door opener latch, characterized in that - the actuator (20) comprises a motor (23) having a rotatable shaft (16) supporting a worm thread (15), and a spring member (13) having two end portions (14a, 14b) is provided, wherein a first end portion (14b) of the spring member (13) engages with the worm thread (15) in order to displace the spring member (13) linearly in the direction of extension of the rotatable shaft (16) by rotating the worm thread (15), and wherein the blocking member (30) is mounted in the main body (2) so that it can be moved linearly, and wherein the second end portion (14a) of the spring member (13) is connected to the blocking member (4, 30) in order to displace the blocking member (4, 30) from the locking position to the release position and back.

2. The door opener (1) according to claim 1, characterized in that the actuator (20) comprises a linearly displaceable plunger (8) which is arranged to act upon the blocking member (30), in order to displace the blocking member (30) from the locking position into the release position when the plunger (8) is moved in the direction of the blocking member (30), wherein the plunger (8) is connected to the second end portion (14a) of the spring member (13).

3. The door opener (1) according to claim 2, characterized in that the plunger (8) is guided in a rotationally fixed manner.

4. The door opener (1) according to any one of the preceding claims, characterized in that in two end positions, the spring member (13) does not engage with the worm thread (15) and is no longer displaced by the worm thread (15) upon the latter's further rotation.

5. The door opener (1) according to any one of the preceding claims, characterized in that in the closed position, the door opener latch (3) protrudes beyond the outline of the main housing (2).

6. The door opener (1) according to any one of the preceding claims, characterized in that a door sensor (29) is provided for monitoring the presence of a door lock latch.

7. The door opener (1) according to claim 6, comprising control electronics, characterized in that the door sensor (29) and the actuator (20) are coupled with the control electronics and in that the control electronics for driving the actuator (20) is configured to transfer the blocking member (30) into the release position in the presence of a door release signal and to bring the blocking member (30) back into the locking position, once the absence of the door lock latch is detected by the door sensor (29).