EP3199728B1 - Impact-resistant door opener - Google Patents

Description

The invention relates to a impact-resistant door opener for installation in a door according to the features of the preamble of claim 1.

Such a door opener is from the DE 10 2012 009 067 B3 known. The door opener described there has a cooperating with a change locking lever, which is locked in the locked position against accidental opening. For this purpose, the change to a pin which engages in the locked position in a recess mounted on the door opener housing. This prevents unintentional pivoting of the locking lever due to vibration or impact.

From the DE 10 2004 008 348 B3 is also a safe door opener known. This door opener has an armature, which is designed as a two-armed lever, wherein the two lever arms in a line to each other are arranged and are rotatably mounted in their center of mass. Due to the mounting of the armature in the center of gravity unintentional pivoting of the armature in case of shock or shock is prevented.

Without effective manipulation protection, there is a risk that a door opener may unintentionally open due to shaking or hard impacts or shocks, thereby allowing unauthorized access to a secured building. In practice, door openers are used with impact protection to ensure a high safety standard even with appropriate manipulation attempts.

Object of the present invention is to provide a shock-proof door opener, which is structurally simple and has a high security against manipulation.

This object is achieved by a door opener with the features of claim 1.

The door opener according to the invention has a locking device which cooperates via an interposed change with a movable door opener latch in order to switch it into a blocking position or a release position. The locking device comprises a spool and a linearly movable over the spool ram, which cooperates with an element, preferably a locking lever of the locking device to actuate this between a locking position and a release position. The plunger has a limit stop, which rests in the locked position on the coil or a bobbin and limits the path of the plunger. In this case, either the limit stop is formed from an elastomer, or a

Elastomer element is arranged between the limit stop and the coil or a bobbin and / or
the coil is connected to the housing via an elastomeric bearing.

It has been found that when shocks and / or shocks the housing of the door opener and the components contained therein are vibrated. As a result of the oscillations, oscillation peaks can occur in the case of adjoining components which add up to motion impulses and as a result of which uncontrolled movements of individual movably mounted components can occur. So it may happen, for example, that receives an impulse towards the release position by the vibrations of the plunger and thus the door opener may be unlocked accidentally. The solution according to the invention provides for damping or suppressing any vibrations or such a movement impulse by means of an elastomer element. Due to its elastic properties, the elastomeric element absorbs such peaks of the vibrations and ensures that it can not inadvertently come to a displacement of the plunger from the locking position to the release position.

By elastomeric element is meant a damping component, which consists for example of a rubber or a rubber. As the rubber, for example, a preferably vulcanized natural rubber or a vulcanized silicone rubber or an industrially manufactured rubber, for example, a butyl rubber (IIR) or polyurethane rubber (AU, EU) can be used. Of course, other elastomeric materials can be used.

The plunger is slidably mounted in the coil or the bobbin. The plunger is acted upon by a return spring and is spring loaded in the locked position with its limit stop on the coil and / or a bobbin. The limit stop limits in particular the immersion depth of the plunger in the coil or in the bobbin. For an effective impact protection is provided that either the limit stop itself is formed of an elastomer or that the limit stop comprises an elastomer. The elastomer dampens vibration impulses transmitted from the bobbin or coil to the plunger. This prevents that these vibration pulses can assume a value that automatically sets the plunger in the direction of the release position in motion.
Alternatively or additionally, it is provided that an elastomer element between the limiting stop on the one hand and the coil or the bobbin on the other hand is arranged. In this case, it is a separate elastomer element which acts as a damping element to suppress vibration pulses transmitted from the coil and / or bobbin to the plunger. Likewise, it is provided in an alternative embodiment or in addition to the aforementioned embodiments, that the coil is connected to the housing via an elastomeric bearing.

The elastomeric bearing may in one embodiment, for example, have a sleeve which is surrounded by an elastomer, which in turn is in communication with the door opener housing. The coil or a fixing pin of the coil is inserted into the sleeve and held there, for example screwed. This prevents direct metal-to-metal contact between the coil and the housing. About the interposed elastomer is a effective vibration damping to suppress spikes transmitted from the housing of the door opener to the spool. This also achieves an effective damping of movement pulses and thus prevents the plunger from unintentionally moving from the blocking position in the direction of the release position.

In one embodiment, it may be provided that the limit stop is arranged on the plunger, preferably that the limit stop is designed as a nose connected to the plunger or as a circlip surrounding the plunger.

Preferably, the elastomer element may be formed in one embodiment as an elastomeric ring whose inner diameter is greater than the outer diameter of the plunger. In particular, the elastomer element may be formed as a disc with an inner hole, or as an O-ring. The plunger penetrates the inner hole of the elastomeric element. By the inner diameter of the elastomeric element is greater than the outer diameter of the plunger, at least as the outer diameter of the plunger in this area, it is prevented that between the elastomeric element and the plunger friction forces occur, which could adversely affect a movement of the plunger.

Furthermore, it can be provided that the elastomer element is fastened either to the coil or to the bobbin. Likewise, the elastomeric element may be attached to the limit stop.

For ease of installation and / or maintenance can be provided that the limit stop on the plunger is held exchangeable. Of the

Limit stop and / or the plunger may be formed of a relatively hard material, such as a metal or a hard plastic. This allows high mechanical strength and precise manufacturing. However, such a hard material is susceptible to the transmission of pulse peaks. By the elastomeric element, which is arranged between a contact surface of the limit stop and the coil or the bobbin, an effective damping of vibration peaks or pulse peaks is made possible.

In one embodiment, it may be provided, in particular, that the locking device has a coil-actuated safety stop which cooperates with an element of the locking device, preferably a locking lever or the change, to prevent release of the change. Preferably, it can be provided that the safety stop is actuated by the same coil which actuates the plunger.

In one embodiment it can be provided that the locking device comprises a rotatably mounted locking lever, which cooperates with the change. The coil cooperates with the pawl by the plunger to actuate it between a locking position in which the locking lever is in abutment with the change, and a release position in which the locking lever is out of attack of the change. It is essential here that the locking lever has two mutually angled lever arms, wherein the first lever arm interacts with the change and the second lever arm protrudes in the direction of the plunger and cooperates in the locked position with an actuatable by the coil safety stop to a release of the change and thus a Release the trap to prevent. Of the Safety stop prevents the locking lever from rotating in the direction of the release position in the event of vibrations or shocks.

In the case of shocks, shakes or blows in conventional door openers there is a risk that the locking lever will rotate automatically or due to its inertia in the direction of the release position. In the door opener according to the invention, the locking lever is held by the securing stop in the locking position. The safety stop prevents the locking lever from disengaging from the change or leaving its blocking position.

The safety stop is used especially in strong shocks as a secure fixation of the locking lever and thus as an effective service. The safety stop therefore complements the elastomeric element in order to obtain an effective and reliable impact protection of the door opener over a larger vibration range or vibration range.

The door opener can be designed in particular as a working current door opener, ie in the de-energized state the door latch is locked. That is, without energizing the coil, the locking lever is in the locked position. The door opener is unlocked by energizing the coil and actuating the linearly movable plunger to switch the locking lever from the blocking position to the release position. The plunger is moved by the coil in the direction of the first lever arm of the locking lever, comes into contact with this and takes with it. The locking lever rotates so far that it comes out of engagement with the change, ie in the release position. The coil also actuates the safety stop with the plunger so that it is ensured that the locking lever can be switched to the release position. Of the Safety stop is designed as a movable safety stop. It is moved out of the range of movement of the locking lever when unlocking the spool. By the same coil actuates both the safety stop and the linearly movable plunger, it is prevented that it can malfunction by the locking lever can not be switched by the coil in the release position, because the backup stop is still effective by mistake.

It is preferably provided that the locking lever cooperates with a spring and is acted upon by the spring in the blocking position. The safety stop is provided as an additional safeguard, should the force of the spring no longer be sufficient to hold the locking lever in the locked position as a result of shocks. To lock the door opener, the coil is de-energized. The locking lever is then rotated by a spring in its locked position, thus blocking the change or the door latch.

In particular, it can be provided that the securing stop protrudes in the blocking position into the range of movement of the locking lever, in particular of the second lever arm and thereby prevents pivoting of the locking lever. The locking lever is rotatably mounted. When switching the locking lever in the release position of this covers a certain range, the range of movement of the locking lever. The safety stop protrudes in the blocking position in this movement range in such a way that pivoting of the locking lever is prevented by the safety stop blocks the path of the locking lever. To switch the locking lever in the release position, the coil actuates the safety stop so that it is moved out of the range of movement of the locking lever out. In particular, it can be provided that the coil acts on the safety stop to to move it out of the range of movement of the second lever arm during the switching of the locking lever from the locking position to the release position.

Protruding into the range of motion means that in particular there is no adhesion between the safety stop and the locking lever. Preferably, the safety stop loosely abuts against the second lever arm of the locking lever. Loose abutment means that there is loose contact between the safety stop and the second lever arm, or that the safety stop is spaced from the second lever arm so that there is a gap or clearance between the safety stop and the second lever arm. In this way, jamming of the door opener is reliably prevented. Even with high preload is thus ensured that the locking device without problems between the release position and the locking position can be switched.

In particular, it can be provided that the second lever arm protrudes freely in the direction of the plunger. That is, the second lever arm extends from the first lever arm in the direction of the plunger, without being applied to the plunger. The free canting can be done by the second lever arm extending obliquely from the first arm in the direction of the plunger and / or the safety stop or by the second lever arm, starting from the first lever arm parallel to the plunger and in the region of its free end in Direction is bent towards the plunger and / or has a stop cam. Preferably, the first lever arm is fixedly connected to the second lever arm, in particular integrally formed.

In one embodiment, it may be provided that the securing stop is designed as a securing pin, which is mounted linearly displaceable in or on the coil or a stationary bobbin. The locking pin may extend parallel to the plunger and be mounted linearly displaceable in the axial direction. In the locking position, the locking pin protrudes from the coil or the bobbin and into the range of movement of the locking lever. The locking pin can cooperate with a spring, wherein the spring acts on the locking pin so that it is forced into the range of movement of the locking lever. When the coil is energized, the safety lever is retracted by the magnetic force of the coil, i. pulled out of the range of motion of the locking lever, so that the locking lever can swing freely. When energizing the coil, the plunger is simultaneously moved in the direction of the first lever arm of the locking lever comes with this in abutment and then pivots the locking lever about its axis of rotation to unlock the change or the case. Preferably, the distance traveled by the plunger to switch the locking lever from the locking position to the release position is longer than the distance to be traveled by the locking pin to release the locking lever. This ensures that temporally first the backup stop releases the range of motion of the locking lever and then the locking lever can be pivoted by the plunger.

In an alternative embodiment it can be provided that the safety stop is arranged on the plunger. Preferably, the securing stop may be formed as a securing ring, which is mechanically connected to the plunger and has a larger diameter than the plunger. In particular, the securing stop is arranged in the region of the free tip of the tappet. In the locked position is the tip of the plunger arranged with the safety stop outside the coil or outside of the bobbin. The safety stop is in a position that projects into the range of movement of the locking lever. This effectively prevents inadvertent switching of the lock lever from the lock position to the release position. It can be provided that the securing stop or the securing ring is a part of the plunger or that the plunger is integrally connected to the securing ring. The safety stop can also be designed as a separate part, for example as a plastic ring or metal ring, which can be placed on the plunger and connected by a mechanical connection with the plunger.

The safety stop can also be designed as a limit stop and limit the depth of immersion of the plunger in the coil or the bobbin. In order to increase the impact safety, the elastomer element between the locking ring and the coil or the bobbin can be arranged.

It is preferably provided that the securing stop has a stop surface which is separated in the blocking position by an air gap of the second lever arm and comes in contact with the second lever arm in shock. It is thereby achieved that the plunger itself has the securing stop or that a portion of the plunger is designed as a securing stop. The air gap can be in the range between 0.1mm and 5mm. By the movement of the plunger as a result of the energization of the coil of the backup stop is automatically moved and moved out of engagement with the range of movement of the locking lever. At the same time the locking lever is switched from the locking position to the release position.

In order to achieve a particularly high resistance to vibration or shock, it can be provided that the locking device has a blocking device which blocks a movement of the plunger in the direction of the release position in the blocking position. The blocking device is provided in addition to the locking device and / or in addition to the elastomeric element. Through the locking device, the locking lever is blocked in the locked position. In addition, the blocking device blocks movement of the plunger in the direction of the release position. This causes a double security, since in a manipulation, both the locking device and the blocking device are overcome.

In one embodiment it can be provided that the blocking device has a stop surface arranged on the safety stop with a toothing which engages, at least in the case of vibrations, in a toothing arranged on the second lever arm in order to prevent a movement of the tappet in the direction of the release position. Preferably, the toothing of the second lever arm and / or the toothing of the plunger can be formed as a saw toothing. The saw toothing results in a secure blocking of the plunger and at the same time prevents the toothing from becoming irreversibly caught.

In one embodiment, it may be provided that the blocking device has a rotatable blocking element cooperating with the plunger, that is acted upon by a spring and urged out of the range of movement of the plunger and automatically moves in vibrations in the movement range of the plunger, a movement of the plunger to block towards release position. The blocking element can be configured as a rotatable lever whose mass distribution is arranged in such a way is that the blocking element automatically moves in the range of motion of the plunger in case of shock or vibration due to the inertia. About the spring, the blocking element is pushed out of the range of movement of the plunger so that normally the plunger is freely actuated. Only with shocks or blows a movement of the plunger is blocked by the blocking element, thus preventing an unlocking of the door opener.

In order to achieve a compact design, the blocking element can be rotatably mounted on the second lever arm of the locking element.

In a further alternative embodiment it can be provided that the blocking device has a magnetically actuable blocking element which cooperates with the coil in such a way that the blocking device releases the plunger either when the coil is energized, or releases the plunger when the coil is switched off. The magnetically actuated blocking element ensures that the blocking element is actuated when the coil is energized. The magnetic force can be transmitted directly from the coil to the blocking element. Likewise, it can also be provided that the bobbin and / or the plunger is designed to be magnetically conductive and conducts the magnetic field lines from the coil to the blocking element.

In particular, it can be provided that the blocking device comprises a magnetically actuable blocking element which is mounted either in or on the coil or in or on the bobbin and engages in the blocking position in a recess of the plunger to block movement of the plunger in the direction of release position, or that the blocking element in or is mounted on the plunger and engages in the blocking position in a arranged on the coil or the bobbin recess or engages behind an arranged on the coil or the bobbin edge to block movement of the plunger in the direction of release position.

The magnetically actuable blocking element can be designed as a linearly displaceable blocking bolt or as a rotatably mounted blocking flap.

In one embodiment of the door opener as Arbeitsstromtüröffner can be provided that the magnetically actuated blocking element is spring-loaded and is urged by a spring in a position which blocks movement of the plunger in the direction of release position. When energized, the coil can actuate the blocking element counter to a spring force into a position releasing the plunger.

In order to realize a compact design of the door opener can be provided that the plunger is longer than the longitudinal extent of the coil and passes through the interior of the coil or the bobbin in the axial direction. The plunger may have at its end remote from the locking lever a collar whose diameter is greater than the inner diameter of the coil or of the bobbin. The plunger is stored, so to speak, inside the coil or inside the bobbin. That is, the interior of the coil or bobbin has a recess or bore in which the plunger is received. The collar of the plunger serves as a stop for the bobbin and limits its lifting movement. Since the diameter of the collar is greater than the inner diameter of the coil, the collar comes into contact with the coil or the bobbin. Inner diameter of the coil or the bobbin here refers to the clear width of the recess or the bore of the coil or the bobbin.

In one embodiment it can be provided that the blocking element engages between change and plunger to block the plunger, preferably that the blocking element is mounted on the collar and engages in the blocking position in a recess arranged on the recess or arranged on the change edge engages behind to block a movement of the plunger in the direction of the release position. Due to the interaction between the blocking element arranged on the collar and the change of the door opener, a movement of the tappet in the direction of the release position is effectively blocked.

In a constructive embodiment can be provided that the plunger has a form-fitting guided in the interior of the coil or the bobbin plunger body and has a mounted on the plunger body, projecting in the direction of locking lever from the bobbin plunger tip. In particular, it can be provided that the blocking element is mounted on the plunger body and engages in the blocking position in a arranged on the coil or bobbin recess or engages behind an arranged on the coil or bobbin edge to block movement of the plunger towards the release position , The arrangement of the blocking element on the plunger body, so to speak inside the solenoid formed by coil and plunger results in an additional reduction of the necessary space. Due to the interaction between bobbin and coil on the blocking element, the plunger is securely blocked in the locked position. The blocking element in this case provides a mechanical connection between the coil or bobbin on the one hand and the plunger on the other hand.

Fig. 1:

Eine schematische Ansicht des erfindungsgemäßen Türöffners an einer Tür,

Fig. 2A, 2B:

eine schematische Ansicht eines Ausführungsbeispiels des Türöffners mit einem als Sicherungsstift ausgebildeten Sicherungsanschlag,

Fig. 3A - 3C:

eine schematische Ansicht eines Ausführungsbeispiels des Türöffners mit einem Sicherungsanschlag mit verzahnter Oberfläche,

Fig. 4A, 4B:

eine schematische Ansicht eines Ausführungsbeispiels des Türöffners mit einem am zweiten Hebelarm gelagerten Blockierelement,

Fig. 5A, 5B:

eine schematische Ansicht eines Ausführungsbeispiels des Türöffners mit einem am Kragen des Stößelkörpers gelagerten Blockierelement,

Fig. 6A, 6B:

eine schematische Ansicht eines Ausführungsbeispiels des Türöffners mit einem am Stößelkörper gelagerten Blockierelement.

In one embodiment, it may be provided that the blocking element or the securing pin has a ferromagnetic material or is formed from a ferromagnetic material or has a permanent magnet or is designed as a permanent magnet or is connected to a permanent magnet. In the figures in the following description of the figures embodiments of the invention are explained in detail. Showing:

Fig. 1:

A schematic view of the door opener according to the invention on a door,

FIGS. 2A, 2B:

a schematic view of an embodiment of the door opener with a locking pin designed as a safety stop,

FIGS. 3A-3C:

a schematic view of an embodiment of the door opener with a safety stop with toothed surface,

4A, 4B:

1 is a schematic view of an embodiment of the door opener with a blocking element mounted on the second lever arm;

FIGS. 5A, 5B:

a schematic view of an embodiment of the door opener with a mounted on the collar of the plunger body blocking element,

FIGS. 6A, 6B:

a schematic view of an embodiment of the door opener with a blocking element mounted on the plunger body.

In the individual figures, the door opener 1 according to the invention is shown partially in different embodiments. The basic structure of the door opener 1 is identical in the individual embodiments. In the figures and the description of the figures, identical reference symbols are used for the same components.

Fig. 1 shows a schematic representation of a building door 9. The building door 9 comprises a door frame 91 and on the door frame 91 via hinges 92a and 92b rotatably mounted door leaf. The door leaf 93 has a lock 94. To make the door, the lock 94 can be opened via a door handle 942 or a key. A firing latch 941 is mounted in the lock 94. In the area of the door frame 91, the door opener 1 is mounted opposite the lock 94. The door opener 1 comprises a door opener housing 11 with a pivotally mounted door opener latch 12. In the closed position, the latch 941 engages in a latch receiving space of the door opener 1 and cooperates with the pivotable door opener latch 12. The released door opener latch 12 is free to pivot about its longitudinal axis. This makes it possible to open the door 93 without operating the door handle. The latch 941 acts on a blocking surface of the door latch 12 and pivots it when opening the door.

When locked door latch 12 this is fixed and can not swing. In the closed position of the door leaf, the latch 941 cooperates with a blocking surface of the pivoting latch and abuts against it. That the door leaf 93 is locked in its closed position by the door latch latch and can not be opened. Only after retraction of the latch 941 in the door lock, for example by pressing the door handle or after unlocking the door latch 12, the door 93 can be opened.

The in the Figures 1 to 6b illustrated door opener 1 has the construction described below in all the embodiments shown. A door opener housing 11 supports a pivotable door opener latch 12. A locking device 2 arranged in the door opener housing interacts with the door opener latch 12 via a rotatably mounted change 13 in order to release or lock it. The locking device 2 comprises an armature or a locking lever 24, which cooperates with the change 13 and actuated by a solenoid 21, that is, switched between a release position and a blocking position. The armature or the locking lever 24 cooperates with a spring 24 f, which acts on the locking lever 24 in the release position. The solenoid 21 comprises an electrical coil 22 and a linearly movable from the coil plunger 23. The coil 22 is wound on a bobbin 22k, which has a bore in its center, in which the plunger 23 is guided linearly displaceable.

The plunger 23 has a plunger body 232 and a plunger tip 233. The plunger body is formed as a coil core and holds at one end the plunger tip 233. The plunger body is ferromagnetic and is driven by the coil 22 in the axial direction. Via a return spring 26, the plunger 23 is acted upon in the locking position. Of the Plunger body 232 has a larger diameter than the plunger tip 233. The plunger body 233 is guided positively in the coil 22 and in the bobbin 22k and can be moved in the axial direction.

In the locked position, the armature of the door opener or the locking lever 24 is in abutment with the change 13. The change 13 is blocked by the locking lever 24 and thus prevents pivoting of the door latch 12. The locking lever 24 has two lever arms 241, 242. The two lever arms 241, 242 are integrally formed and therefore firmly connected. The first lever arm 241 interacts directly with the change 13. The second lever arm 242 extends at right angles to the first lever arm 241. The locking lever 24 is rotatably supported via a rotation axis 24a in the door opener housing. The axis of rotation 24a is located in the region of the intersection between the first lever arm 241 and the second lever arm 242.

The locking of the door opener latch or the change 13 takes place by a rotatably mounted on the first lever arm 241 via a bearing pin 245 roller 244 rests on a support 132 of the change 13. As a result, pivoting of the change 13 is prevented and fixed. The roller 244 reduces the frictional forces between the change 13 and locking lever 24, so that even with a high preload a switching of the locking lever 24 without jamming is possible. The locking lever 24 is acted upon by a spring 24 f, the locking lever 24 in the in the Fig. 2a shown blocking position urges.

Hereinafter, individual embodiments of the door opener 1 will be described. The different embodiments each differ only by the described different components.

In the FIGS. 2a and 2b an embodiment of the door opener 1 in the region of its locking device is shown in an enlarged sectional view. It is an embodiment of the door opener 1, in which the locking device 2 has a safety stop 25, which is designed as a linearly movable locking pin 251. The locked position of the door opener is in the Fig. 2a shown. The Fig. 2b shows the release position, the change of clarity is not shown.

The plunger 23 is acted upon by a return spring 26, the plunger 23 in the in the FIG. 2a shown blocking position urges. In the region of its tip, the plunger has a limit stop 23b. This limits the path of the plunger in the coil 22 and the bobbin 22k inside. In the blocking position, the limit stop 23b bears against the coil 22 or the bobbin 22k. The limit stop 23b is formed of an elastomer 27. As a result, the limit stop 23b has vibration-damping properties and prevents the formation of vibration peaks in the event of impacts or shocks which move the tappet 23 to the right, that is to say into the inward direction FIG. 2b move shown release position.

In order to secure the locking lever 24 in the locked position against vibrations, a locking device is provided which has an axially displaceable locking stop 25. The second lever arm 242 of the locking lever 24 projects freely in the direction of the securing stop 25.

The securing stop 25 is designed as a securing pin 251. The locking pin 251 is received in a recess of the bobbin 22k and is by a spring 25f out of the bobbin 22k out and in the range of movement of the locking lever 24 pressed. The locking pin 251 is slidably mounted parallel to the plunger 23.

Like in the FIG. 2a is illustrated, the safety stop 25 forms a one-sided stop surface for the locking lever 24 and the second lever arm 242 from. That is to say the locking lever 24 or its second lever arm 242 has a contact zone which, upon rotation of the locking lever, comes into contact with the locking pin 251 as a result of vibrations or impacts. In the in the Fig. 2a shown blocking position, the second lever arm 242 only a loose contact with the locking pin 251 and is arranged at a small distance parallel to this. Only when correspondingly strong shocks or impact tests of the locking lever 24 begins to rotate about its axis of rotation 2a, the second lever arm 242 comes into contact or in firmer contact with the locking pin 251. The locking pin 251 prevents the locking lever 24 continues in Direction release position can rotate. This ensures that even when shaken or tampering attempts the locking lever 24 is fixed or secured in its locked position and the door opener latch 12 is blocked

In the Fig. 2b the release position of the door opener 1 is shown. To switch the door opener latch 12 to the release position, the coil 22 is energized. As a result of the energization, a magnetic field builds up around the coil, which on the one hand moves the plunger 23 in the direction of the blocking lever and, on the other hand, pulls the blocking pin 251 into the coil body 22k. The locking pin 251 is in the bobbin at a small distance and parallel to the Tappet tip 233 stored. In a vertical projection of the lifting magnet 21 is the locking pin 251 adjacent to the plunger tip 233 and within a cross-sectional area of the plunger body 232. The plunger body 232 has in the region of its front end a recess into which the locking pin 251 can engage. Thus, a particularly compact construction of the door opener 1 is achieved. The plunger 23 is with its plunger tip 233 in direct contact with the first lever arm 241 and has rotated the locking lever about the rotation axis 24a so far that it is out of abutment with the change 13. That is, the change 13 can rotate and thus releases the door opener latch 12. That is, the door latch can be pivoted about its longitudinal axis.

In order to lock the door opener 1 again after release, the current flow to the coil 22 is switched off. Then both the change 13 and the locking lever 24 via springs in the in Fig. 2a transferred shown blocking position. In addition, the plunger 23 by the plunger return spring 26 to the left in the in Fig. 2a moved position shown. In addition, the locking pin 251 is pushed out of the bobbin 22 k via the spring 25 f and secures the locking lever 24 in its locking position.

In the FIGS. 3a, 3b and 3c another embodiment is shown. This embodiment differs in particular in that the securing stop 25 is designed as a securing ring 252 and is connected to the plunger 23. The Fig. 3a shows the normal lock position. In the Fig. 3b the lock position is shown in case of vibrations.

The securing ring 252 is arranged in the region of the plunger tip 233 outside of the bobbin 22k or outside of the lifting magnet 21. Of the Circlip 252 is located as in the Fig. 3a is shown with a small distance from the second lever arm 242 opposite. The second lever arm 242 has in the region of its free end on a stop which cooperates with the securing stop 25 and the locking ring 252. Between the locking ring 252 and the second lever arm 242 of the locking lever 24 is an air gap. The air gap is about 0.1 mm to 5 mm.

In a tampering or impact test, the locking lever 24 moves about the axis of rotation 24a. In this case, the locking lever 242 comes into contact with the locking ring 252, as in Fig. 3b is shown. Further rotation of the locking lever 24 in the direction of the release position is not possible. Even in this slightly rotated position is how out Fig. 3b can be seen, the locking lever 24 into abutment with the change 13. The arranged in the stop roller 244 still covers the support 132 of the change 13 and fixes this. As a result, remains in a Aufschlagversuch the pivot latch 12 of the door opener in the locked position.

In the FIGS. 3a, 3b and 3c In addition, a blocking device 3 is shown. This includes two toothed surfaces that engage each other to block the plunger. Circlip 252 has a serrated surface 253z. Also, the abutment surface 243z of the second lever arm 242 has a serrated surface. Like in the Fig. 3b is illustrated, the serrated surfaces 243z and 253z engage in a tampering attempt. As a result, a displacement of the plunger 23 is effectively blocked. In a Aufschlagversuch is thus prevented that the plunger 23 can be moved in the direction of the lever 241. By this additional blocking of the plunger 23 in the release position, an additional security against tampering is achieved.

The plunger 23 is in turn acted upon by a return spring and lies in the in FIG. 3a shown blocking position with its limit stop 23b on the bobbin 22k. The limit stop 23b is designed as a securing ring 252. Between the limit stop 23b and the bobbin 22k an elastomer element 27 is arranged. The elastomer element 27 is formed as a flat disc with a round opening. The opening has a clear diameter which is larger than the outer diameter of the plunger 23. The plunger 23 passes through this opening without touching the elastomer element 27. The elastomer element 27 has vibration-damping properties and prevents vibration peaks forming in the case of impacts or shocks, which move the plunger 23 to the right, that is to say into the release position.

In the FIGS. 4a and 4b a further variant of the door opener 1 according to the invention is shown. The FIG. 4a shows the normal lock position. The FIG. 4b shows the locked position in a tampering attempt. In this variant, the locking device 2 also has a plunger 23 disposed on the locking ring 251, which serves as a safety stop 25 to the locking lever 24 in the in the Fig. 4a keep locked position shown. The locking ring 251 is also designed as a limit stop 23b, which rests in the locking position on the bobbin 22k. The bobbin has an elastomeric member 27 provided between the limit stopper 23b and the bobbin, and as a damping member for suppressing vibration peaks due to tampering attempts or impact tests serves. Further, a blocking device 3 is provided which holds the plunger 23 in its locking position. The blocking device 3 has a blocking element 31t, which is rotatably mounted on the second lever arm 242 of the locking lever 24. The pivot bearing of the blocking element 31t has an axis of rotation 31a which runs parallel to the axis of rotation 24a of the blocking lever 24. Via a spring 34b, the blocking element 31t is normally in the in Fig. 4a Lock position shown held out of engagement with the plunger 23. When energizing the coil 22, the plunger 23 moves to the right, thereby actuating the locking lever 24 in the release position.

In a tampering attempt, i. in case of impacts or as a result of strong vibrations, the blocking element 31t rotates into the range of movement of the plunger 23 due to its inertia. If the plunger 23 now moves in the direction of the first lever arm 241 due to shocks or shocks, it comes into abutment with the blocking element 31t, which effectively prevents further movement of the plunger 23. At the same time, the second lever arm 242 with its stop surface 243 in abutment with the locking ring 252 and prevents the locking lever 24 can be rotated in the direction of the release position. Thus, the door opener 1 has an impact protection device with two securing devices, namely the securing device 2 and the blocking device 3.

In the FIGS. 5a and 5b another embodiment of the door opener 1 is shown. The safety device 2 comprises, as in the embodiment described above FIGS. 4a and 4b , arranged in the region of the tip of the plunger 23 circlip 252, which serves to secure the locking lever 24 in its locking position with a in the region of the free End of the second lever arm 242 arranged abutment surface 243 cooperates. The securing ring also serves as a limit stop 23b, which rests in the locking position on the bobbin 22k. The limit stop 23b has an elastomer element 27. The elastomer element 27 is arranged on the bobbin 22k facing side of the limit stop 23b and connected thereto. Due to its elastic properties, the elastomer element damps vibrations and prevents impulse peaks from being transmitted from the bobbin 22k to the plunger 23 during vibrations. In the event of strong vibrations, the stop surface 243 also comes into contact with the securing ring 252 and effectively prevents the blocking lever 24 from pivoting in the direction of the release position.

Furthermore, the door opener 1 comprises a blocking device 3 with a blocking element 42m, which is arranged on the collar 231 of the tappet body 232. The blocking element is mounted on the peripheral surface of the collar 231 in a recess. The blocking element 32m is acted upon by a spring in the direction of the change 13 and engages in the locking position in a recess 131 of the change 13 a. As a result, the plunger 23 is blocked in the locked position by the change 13. About the blocking element 32m so the plunger 23 in his in the Fig. 5a Lock position shown held and secured against unintentional extension in the direction release position.

To spend the locking lever 24 in the in the Fig. 5b shown release position, the coil 22 is energized. As a result of the magnetic field built up by the coil 22, the blocking element 32m is attracted and pivots into the collar 231 of the plunger body 232. That's what happens Blocking element 32m out of engagement with the change 23 or the recess 131 of the change. The blocking element 32m is magnetically actuated. For this purpose, the blocking element 32m may be formed of a ferromagnetic material or have a permanent magnet.

The plunger 23 can move in energized coil 22 in the axial direction of the locking lever 24. At the same time, the plunger 23 takes along the securing stop 25 and moves it out of the range of movement of the blocking lever 24. This has the consequence that the locking lever 24 about the rotation axis 24a in the in Fig. 5b can rotate shown release position. The rotation of the locking lever 24 is finally carried out by the plunger 23 and the plunger tip 233 comes into contact with the first lever arm 241 and thereby moves the first lever arm 241 in a clockwise direction. Characterized the locking lever 24 is pivoted about the axis of rotation 24a and formed by the roller 244 and the support of the change 13 stop is released.

In the Figures 6a and 6b another embodiment of the door opener 1 is shown. Unlike in the FIGS. 5a and 5b illustrated embodiment of the blocking device 3, here the blocking element 33m is not arranged on the collar 231 of the plunger body 232. The blocking device 3 instead has a blocking element 33m which is rotatably mounted directly on the plunger body 232 in a recess. Via a spring 34a, the blocking element 33m out of the plunger body 232, ie in the in the Fig. 6a shown locked position. In the blocking position, the blocking element 33m engages behind an edge 22a arranged on the coil 22 or in the bobbin 22k. As a result, the blocking element 33m blocks movement of the plunger 33 in the direction of the locking lever 24. The blocking element 33m is actuated magnetically. This can do that Blocking element 33m be formed of a ferromagnetic material or have a permanent magnet.

To switch the door opener 1 in the release position, the coil 22 is energized. About the built-up of the coil 22 magnetic field, the blocking element 33m is pivoted into the plunger body 232 and comes out of engagement with the locking edge 22a. Now, the plunger 23 can extend due to the magnetic force of the coil 22 in the direction of the locking lever 24 and pivot about the axis of rotation 24 a. To lock the door opener 1, the energization of the coil 22 is turned off. After switching off the flow of the plunger 23 is returned by the return spring 26 in the in the Fig. 6a moved shown locking position. At the same time the locking lever 24 and / or the change 13 is urged by spring force in the locked position to block the case 12. Also, the blocking element 33m is pushed out of the plunger body 23 due to the spring force and comes again into engagement with the blocking edge 22a. As a result, the plunger 23 is fixed again. By the securing device 2, which comprises a arranged in the region of the plunger tip 233 circlip 52 which is arranged in the movement range of the second lever arm 242, the locking lever 24 is secured in the locked position.

In case of shock or impact tests, arranged on the lever arm 242 stop surface 243 comes into contact with the stop surface 253 of the locking ring 252. This prevents pivoting of the locking lever 24 toward the release position and the door latch 12 remains securely locked even in tampering attempts.

LIST OF REFERENCE NUMBERS

1

Door Opener

11

door opener housing

12

strike latch

13

change

131

blocking edge

132

In stock

2

locking device

21

solenoid

22

Kitchen sink

22a

blocking edge

22k

bobbins

23

tappet

23a

recess

23b

limiting stop

231

collar

232

Pestle body

233

plunger point

24

Locking lever / anchor

24A

axis of rotation

24f

Return spring

241

first lever arm

242

second lever arm

243

Stop surface lever

243z

gearing

244

role

245

bearing pin

25

securing stop

25f

feather

251

safety pin

252

circlip

253

Stop surface Circlip

253z

gearing

26

Return spring plunger

27

elastomer element

3

blocking device

31a

axis

31t

Blocking element (inertia)

32m

Blocking element (magnetic)

33m

Blocking element (magnetic)

34a, b

feather

9

door

91

doorframe

92a, b

hinge

93

door

94

lock

941

latch

942

pawl

Claims (15)

1. Impact-proof door opener having a housing (11) for installation in a door having a door frame and a door leaf which is mounted moveably thereon, in particular pivotably, having a moveable door opener latch (12), a remote-controllable locking device (2) and an interposed changer (13), which is formed as a one-armed or multi-armed lever and cooperates with the door opener latch (12) in such a manner that the door opener latch (12) can be switched to a locking position and a release position,
   wherein it is provided that the locking device (2) comprises a coil (22) and a tappet (23) which can be linearly shifted by this coil (22), said tappet (23) cooperating with the changer (13) directly or via a locking lever (24), such that this changer (13) can be switched via the tappet (23) operable by the coil between a locking position in which the changer (13) locks the door opener latch and a release position in which the changer (13) releases the door opener latch (12),
   characterised in that
   the tappet (23) has a limiting abutment (23b) which bears against the coil (22) or a coil body (22k) in the locking position, and the limiting abutment (23b) is either formed from an elastomer or has an elastomeric element,
   and/or the elastomeric element (27) is arranged between the limiting abutment (23b) and the coil (22) or the coil body (22k),
   and/or the coil (22) is connected to the housing (11) via an elastomeric bearing.
2. Door opener according to claim 1,
   characterised in that,
   the limiting abutment (23b) is arranged on the tappet (23), the limiting abutment (23b) is preferably formed as a tab connected to the tappet (23) or as a securing ring (252) surrounding the tappet (23).
3. Door opener according to claim 1 or 2,
   characterised in that
   the elastomeric element is formed as an elastomeric ring (27) whose inner diameter is larger than the outer diameter of the tappet (23), and/or
   the elastomeric element, preferably the elastomeric ring (27), is either fastened to the coil (22) or the coil body (22k) or to the limiting abutment (23b).
4. Door opener according to one of the preceding claims,
   characterised in that
   the locking device (2) has a securing abutment (25) that is coil-operable, which cooperates with an element of the locking device (3), preferably a locking lever (24) or the changer (13), in order to prevent a release of the changer (13), preferably the securing abutment (25) is operated by the same coil (22) that operates the tappet (23).
5. Door opener according to one of the preceding claims,
   characterised in that
   the locking device (2) has a rotatably mounted locking lever (24) which has two lever arms (241, 242) angled toward each other, wherein the first lever arm (241) cooperates with the changer (13) and the second lever arm (242) is cantilevered in the direction of the tappet (23) and, in the locking position, cooperates with a securing abutment (25) which can be operated by the coil (22) in order to prevent a release of the changer, preferably
   in the locking position, the securing abutment (25) projects into the movement region of the second lever arm (242) and thus prevents a pivot of the locking lever (24).
6. Door opener according claim 5,
   characterised in that
   the coil (22) acts on the securing abutment (25) in order to move it out of the movement region of the second lever arm (242) from the locking position into the release position during the switching of the locking lever (24).
7. Door opener according to one of claims 5 or 6,
   characterised in that
   the securing abutment (25) is formed as a securing pin (251), which is mounted in a linearly displaceable manner in or on the coil (22) or a stationary coil body (22k), preferably
   the securing pin (251) runs in parallel to the tappet (23) and is mounted in a linearly displaceable manner in the axial direction.
8. Door opener according to one of claims 1 to 6,
   characterised in that
   the limiting abutment is formed as a securing abutment (25), or has the securing abutment (25),
   preferably the securing abutment (25) is formed as a securing ring (252), which is connected to the tappet (23) in a mechanically releasable manner and has a larger diameter than the tappet (23).
9. Door opener according to one of claims 1 to 6 or 7,
   characterised in that
   the securing abutment (25) has an abutment surface which is separated from the second lever arm (242) in the locking position by an air gap and comes into contact with the second lever arm (242) in the event of vibrations, wherein it is preferably provided that the width of the air gap ranges between 0.1mm and 5mm.
10. Door opener according to one of the preceding claims,
    characterised in that
    the locking device (2) has a blocking device (3) which, in the locking position, blocks a movement of the tappet (23) in the direction of the release position, preferably the blocking device (3) has an abutment surface (253) arranged on the securing abutment (25), said abutment surface (253) having a toothing (253z), which engages a toothing (243z) arranged on the second lever arm (242), at least in the event of vibrations, in order to prevent a movement of the tappet (23) in the direction of the release position, wherein it is preferably provided that the toothing (243z) of the second lever arm (242) and/or the tappet (23) is formed as a saw-toothing.
11. Door opener according to one of the preceding claims,
    characterised in that
    the blocking device (3) has a magnetically operable blocking element (32m, 33m), which cooperates with the coil (22) in such a manner that the blocking device (3) releases the tappet (23) during energisation of the coil (22), and/or
    the blocking device (3) has a magnetically operable blocking element (32m, 33m) which is mounted either in or on the coil (22) or in or on the coil body (22k) and engages in a recess of the tappet (23) in the locking position in order to block a movement of the tappet (23) in the direction of the release position, or
    the blocking element (32m, 33m) is mounted in or on the tappet (23) and engages in a recess arranged on the coil (22) or the coil body (22k) in the locking position or engages behind an edge (22a) arranged on the coil (22) or the coil body (22k) in order to block a movement of the tappet (23) in the direction of the release position.
12. Door opener according to claim 11,
    characterised in that
    the magnetically operable blocking element (32m, 33m) is formed as a blocking bolt which is displaceable in a linear manner or formed as a rotatably mounted blocking flap, and/or
    the magnetically operable blocking element (32m, 33m) is spring-loaded and is urged by a spring (34a, 34b) into a position which blocks or releases a movement of the tappet (23) in the direction of the release position.
13. Door opener according to one of the preceding claims,
    characterised in that
    the tappet (23) is longer than the longitudinal extension of the coil (22) and engages through the interior of the coil (22) or of the coil body (22k) in the axial direction and has a collar (231) on its end which is remote from the locking lever (24), the diameter of said collar (231) being greater than the inner diameter of the coil (22) or of the coil body (22k).
14. Door opener according to claim 13,
    characterised in that
    the tappet (23) has a tappet body (232) which is positively guided in the interior of the coil (22) or of the coil body (22k) and has a tappet tip (233) which is mounted on the tappet body (232) and projects out of the coil body (22k) in the direction of the locking lever (24).
15. Door opener according to claim 14,
    characterised in that
    the blocking element (32m, 33m) is mounted on the tappet body (232) and, in the locking position, engages in a recess arranged on the coil (22) or the coil body (22k) or engages behind an edge arranged on the coil (22) or the coil body (22k) in order to block a movement of the tappet (23) in the direction of the release position, preferably the blocking element (32m, 33m) or the securing pin (251) has a ferromagnetic material or is formed from a ferromagnetic material, or has a permanent magnet or is formed as a permanent magnet or is connected to a permanent magnet.

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