DE102008018897A1 - Adhesive bond for use with adhesive collar, is provided between units, where former unit is connected to latter unit by adhesive that is detached by thermal activation - Google Patents

Abstract

The adhesive bond is provided between units. The former unit is connected to the latter unit by an adhesive that is detached by thermal activation. The adhesive is thermally activated by feeding electric power. A substance is provided at the contact area between two units, which decomposes under addition of heat energy. Independent claims are also included for the following: (1) a method for manufacturing a detachable adhesive bond (2) an initial substance for detachable connecting of two units.

Description

The The invention relates to a device for holding a biased set security system.

In modern motor vehicles include safety systems or Safety devices of the prior art, with which, for example Flaps or doors are kept locked. An electric or mechanical actuation of such safety devices allows the opening of these flaps or doors. The security function is limited to this Preventing unauthorized or unintentional opening the flaps or doors. Here are the switching time when disabling the lock feature no separate requirements.

To the critical safety devices include those for the occupant and pedestrian protection, which activates in a very short time Time require a mechanical adjusting movement. To such safety devices include in particular tensioning devices for safety belts, rollover protection bar in cabriolet vehicles, engine cover for the Protection of pedestrians and adjusting devices for car seats and headrests. At execution an actuating movement of such safety devices are different Known systems. In most cases, coil springs are used, the over a suitable holding device to be biased. Such Holding device is via a system of levers and pawls inhibited in his movement. This can be a lever over an electrically activated actuator to be moved. In deactivated Condition when the safety device is held under pretension is, the actuator by the lever in a defined end stop pressed and thus inhibits the movement or actuation of the security system. To trigger the safety device the actuator is electrically activated and leads hereafter a small adjusting movement with small force and relatively large Off to operate the lock lever. The lever system translates the force and stifles the stroke of the actuator and thereby gives the Coil spring free, allowing these to break down their preload can move.

When Actuators for the safety device explained above usually pyrotechnic actuators are used. Alternatively, the use of lifting magnet is known. Regardless of the type of actor subject to the above Safety device the disadvantage that the lever system complicated is constructed. To the very large holding forces setting the coil spring becomes a large lever ratio needed. Because the known actuators in length Their ranges are limited, is the locking lever with the coil spring only on a very small contact surface engaged. In addition, a great rigidity required for the lever system to connect or to prevent a game measure. The above aspects lead to a complex design of the lever system, those with cost disadvantages and also a critical operational safety are connected.

to mechanical connection of two components is on the market so-called pyrotechnic fuse element known, consisting of two with a locking ring firmly interconnected items consists. If necessary, can be triggered by an electrically Pressure pulse, the two components quickly released from each other become. Through the locking ring, both the holding force as well as the separation force can be adjusted application-related. Of the Use of such a pyrotechnic fuse element is z. B. in door hinge bolt to wedged after an accident To be able to split doors or bonnet joints known to set up a hood after an accident can.

US Re 34,238 shows a device for holding a biased security system, designed as a fuel cap. The tank cap consists of a main body which can be screwed onto a threaded pipe socket. In the end face of the tank cap a sealing body forming plate is provided which has a circumferential flange and which is held in the closed position under the bias of a spring which is supported against a collar of the main body. The spring is supported on two legs, which are fixed by a plate on the sealing body and protrude from this in the pipe. The legs are folded down at the end with their projecting into the tube area and form a hook-shaped receptacle for the one end of the spring. The legs are formed of two halves, which are connected to each other via a fusible element. In a conventional overpressure, the sealing body can be lifted a small distance from the main body under tension of the spring and allows escape of the pressurized gas. If the temperature exceeds a preset value, the fusible element melts, the lower halves carrying the spring fall off, and under the gas pressure, the sealing member can be lifted without having to overcome the bias of the spring.

DE 77 12 696 U1 shows a safety valve for a gas line, which is closed in the case of overheating of the normally open passageway by disengaging the valve disk against the valve seat forming annular surface. The valve plate is biased by the spring, which is against a corresponding abutment supported. The spring is penetrated by a valve stem, which is fixed to the valve disc. In a circumferential groove of the valve stem engages a bimetallic strip, which secures the valve disc against disengagement under the bias of the spring. The bimetallic strip moves out of the circumferential groove when a certain temperature is exceeded and releases the valve disk.

US 5,788,212 shows a through valve, which biases a closing member in the opening direction under the bias of a spring, wherein a plunger engages in a circumferential groove of the sealing body and is prevented from disengaging by a thermally activated release mechanism. The thermally activatable disengagement mechanism comprises a shape memory alloy element which shrinks as the temperature increases such that the plunger can be pushed away from the circumferential groove and the passage is released under the bias of the spring.

U.S. 4,176,718 shows a device for holding a prestressed safety system, here: a sprinkler system in which the opening of a sprinkler nozzle is closed by a lid. The lid is in this case positively held by a part in position by one end of the part bears against the lid and the other end of the part against an abutment. A bracket is held between two legs, which are connected to each other via a fusible element. Upon melting of the fusible element, the bracket is disengaged and allows the part to disengage from its closed position and thereby release the lid.

US Pat. No. 5,695,306 describes a connecting device with which two components are connected to each other. The separation of the two components takes place without the use of pyrotechnic means and melting of a fusible material. For this purpose, the device has a housing in which a prestressed compression spring presses by means of a displaceably guided in a hollow piston on a connecting element which extends in the form of a punch through the first component slidably through and is bolted to the underlying second component. In an initial state, the piston is in the hollow chamber in an upper stop position, wherein the hollow chamber is filled below the piston with the fusible material. The fusible material is initially in a solid state, whereby the piston is held forcibly in the upper stop position. In a targeted heating of the meltable material decreases its viscosity, so that the material flows through flow channels past the piston in an upper region of the hollow chamber. As a result, the piston can move within the hollow chamber due to the bias of the compression spring down and presses the connecting element down. In this case, the second component is then separated from the first component. The device according to the US 5,695,306 has a complicated and expensive construction and is not suitable for time-critical safety functions, since the melting of the fusible material takes too much time.

Of the Invention is based on the object, a device for holding to create a biased safety system, the reliable independent unlocking of the security system and with simple means Operating the safety system in a very short response time allows.

These The object is achieved by a device solved with the features of claim 1. Advantageous developments The invention are defined in the dependent claims Are defined.

A Device according to the invention serves to hold a biased safety system and prevents thus the self-unlocking of this security system, and comprises a hook member and one with the hook member an adhesive joint connected base element, which in an initial state is engageable with a part of the security system, thus keeping the security system under tension being, being the part of the security system with which the hook element engaged in its initial state by a thermal Activation of the connection is moved or actuated can.

According to the invention, the connection between the hook element and the base element is that these elements are connected to each other by a wire element, with which the hook element and the base element are wrapped together. The wire element can be melted by supplying thermal and / or electrical energy, which then dissolves the connection between the hook element and the base element. The absorption of tensile forces between the hook element and the base element can be assisted by providing undercuts or the like between these elements. The wire element is then primarily the task to prevent an adjusting movement between the hook member and the base member substantially perpendicular to its longitudinal axis or perpendicular to the effective direction of the tensile force. After the melting of the wire element, such an adjustment movement is possible perpendicular to the direction of the tensile force, so that hook element and base element solve each other. In this variant, the wire element may preferably be made of a metal wire with high resistivity, so that the wire element generates Joule heat upon supply of electrical energy and thereby melts. Constantan or a metal with similar properties is particularly suitable for producing the wire element having such properties.

The Device according to the invention serves to provide a safety system, z. B. a coil spring, reliable under bias to keep. By the thermal activation of the compound, by Supply of heat or electrical energy suitable is converted into heat, that is achieved either the hook element out of engagement with the part of the safety system passes or at least a movement of this part of the security system allows, so that the bias of the security system to reduce its activation. As a result of the stored energy of the safety system or its bias is due to the movement of the part of the security system, a mechanical system or the like operated and thereby executed the safety function. The device according to the invention can be related with safety systems of active hoods for the Pedestrian protection, rollover bars in cabriolet vehicles, Head restraints for occupant protection, belt tensioners or locking systems for proactive occupant protection used by vehicles.

In Advantageous development of the invention, the hook element is elongated formed and with its longitudinal axis substantially parallel arranged to the security system. This has the advantage that the Hook element takes up little space or installation space. additionally Already a slight movement of the hook element is sufficient away from the security system, to disengage the Part of the security system. Conveniently, For example, the hook member may have one end engaged with the part of the security system. If the hook element at least partially made of a memory metal or a bimetal is, performs the thermal activation of the hook element to ensure that its free end is away from the part of the security system moved and thereby disengaged. As a result, can this part of the safety system is moving to the bias or to reduce the stored energy and the safety function as explained. At the same time this is thereby claimed and possibly weakened the wire element, so that a more reliable triggering done can.

The Device comprises a base element, with which the hook element in its initial position is connected, the connection between the Hook element and the base element by the thermal activation is solvable. After hook element and base element have solved each other, the part of the security system to execute the safety function. To one To ensure low installation dimension, the base element elongated in the same manner as the hook element be, wherein the longitudinal axis of the base member to the longitudinal axis the hook element is substantially aligned. The security system assigned base element can also be a part of the security system, for example, a socket; then the wire element wraps around the hook element and the socket.

To the additional connection of the hook element with the base element come several options into consideration. The hook element and the base member may each have a toothed portion have, which sections a positive connection ensure hook element and base element. If the base element and / or the hook element at least partially from a Memory metal or made of a bimetal can these elements are at a thermal activation of each other move away, so that thereby the positive connection of the toothed sections picks up. For example, if the base element is arranged on the side of the hook element that the security system is opposite, it can be enough, only the base element made of a memory metal or a bimetal, so that the base element by the thermal activation to the outside deformed away from the hook element and thereby the positive locking Connection of the toothed sections is canceled. As soon as the positive connection between hook element and base element is canceled, the hook element of the force of the bias of the security system no opposing force oppose, so that, as a result, the part of the security system to execute the security function can move. Thus it is for not necessarily the movement of this part of the security system Required that the hook element disengaged arrives. The only requirement is a release of the Hook element of the base element.

A further variant of the additional connection of the hook element to the base element provides that these elements are connected to one another via a shear bolt, which is arranged with its longitudinal axis substantially perpendicular to the longitudinal axis of the hook element. The shear pin defines a predetermined breaking point between the hook element and the base element. This is achieved in that the shear pin may have a hollow chamber which is located in the Substantially extends along the longitudinal axis of the shear pin. This hollow chamber can be filled with a substance which decomposes with the addition of heat energy. Such a substance is also known as "blasting powder" or as black powder. The decomposition of this explosive powder is highly exothermic and destroys the shear pin, separating the hook element and the base element. The use of such an explosive powder allows very short response times to separate the hook element from the base element and thus to unlock the safety system within a very short time, so that a corresponding execution of the safety function is ensured.

A another variant of the additional connection of the hook element with the base element provides that these elements together are glued. For releasing the hook element from the base element The adhesive can specifically weakened or softened become. For this purpose, at the junction between the hook element and base element a metal wire with high resistivity be provided, the supplied electrical energy in Joule heat converts, so that thereby the adhesive melts and according to the adhesive bond between the hook element and base element is released.

In Advantageous development can be made at the contact surface between the hook element and the base element may be provided with a substance, which decomposes with the addition of heat energy. above Such a substance was already called "blasting powder". Conveniently, such a blasting powder be mixed into the adhesive, with the hook element and base element glued together. For generating a predetermined activation heat or energy can at the contact surface between the hook element and the base member is a high resistivity metal wire be provided, the supplied electrical energy in Joule heat converts and thereby a decomposition of the explosive powder causes, so that the hook element and the base member through this exothermic reaction of the explosive powder are separated from each other. The use of such an explosive powder allows a very short Response time to release the safety system. The usage of the explosive powder is not only in bonding of base element and hook element possible, but also in the variant a positive connection, wherein at the base element and toothed portions are formed on the hook member, respectively.

The Thermal activation can be achieved by adding external thermal energy done. Alternatively, the thermal Activation also be done by supplying electrical energy, for example, on the above-mentioned high specificity metal wire Resistance, what electrical energy then in this metal wire is converted into Joule heat.

Conveniently, An electrical voltage ignites one in the adhesive bond mixed substance, the resulting reaction being exothermic can be, picking up the glue joint. This allows the adhesive bond also canceled without external temperature increase be, for example, in response to an electrical command or a sensor signal. Advantageously, the ignition takes place here in the manner of blowing up the substance, leaving the adhesive bond can be canceled with extremely short time.

The additional connections presented in addition to the wrap can each be provided alone. If two connections are provided, the same time be triggered with the same control command. alternative These are determined by different criteria, for example once Temperature and once applying an electric voltage, triggered so that the risk of accidental release is reduced is.

One Method for making a cancelable connection or for fast Canceling a connection between two holding parts, in particular Base part and hook element, in which the two holding parts of a Wire element wrapped together, characterized by, that applying an electrical voltage to the wire element the connection picks up. The same applies to the adhesive bond, so that two different types of connection advantageous by a applied voltage can be canceled, creating a particularly secure connection is created. At the same time can at Existence of an electrical contact checked be whether the connection has continuity, for example by measurement of resistance.

hereby can be queried at any time for a safety-relevant component be it ready for use.

• – Es werden keine besonderen Werkzeuge zum Wechsel des Sicherheitssystems benötigt, wenn dieses einmal ausgelöst wurde;
• – Für die Aktivierung des Hakenelements ist nur ein minimaler thermischer bzw. elektrischer Energiebedarf erforderlich;
• – Die Ansteuerung des Hakenelements kann unter Verwendung von Airbag-Steuergeräten erfolgen;
• – Eine Aktivierung des Hakenelements ist durch elektrostatische Ladungen nicht möglich;
• – Es sind keine vibrationsempfindlichen Hebelsysteme zur Kraftuntersetzung erforderlich, um das Sicherheitssystem unter Vorspannung zu halten;
• – Die erfindungsgemäße Vorrichtung ist an vorhandene Bauräume einfach adaptierbar, da sie selbst nur einen geringen Einbauraum erfordert;
• – Minimales Gewicht wegen geringer Anzahl von Bauteilen, geringstenfalls nur ein einziges Bauteil in Form des Hakenelements;
• – Keine giftigen oder umweltschädigenden Emissionen;
• – Keine Explosionsgeräusche, minimale Brandgefahr, keine Explosionsgefahr; und
• – Preisgünstige Ausführung möglich.

The abovementioned embodiments of the device according to the invention together lead to the following further advantages:

• - No special tools are needed to change the safety system once it has been triggered;
• - For activation of the hook element only a minimum thermal or electrical energy consumption is required;
• - The activation of the hook element can be successful using airbag control units gene;
• - Activation of the hook element is not possible by electrostatic charges;
• - No vibration-sensitive power reduction lever systems are required to keep the safety system under tension;
• - The device of the invention is easily adaptable to existing space, since it requires only a small installation space itself;
• - Minimal weight due to small number of components, at least only a single component in the form of the hook element;
• - No toxic or polluting emissions;
• - No explosion noise, minimal risk of fire, no danger of explosion; and
• - Inexpensive design possible.

It it is understood that the above and the following yet to be explained features not only in each case specified combination, but also in other combinations or can be used in isolation, without the scope of the present To leave invention.

The The invention is based on preferred embodiments schematically illustrated in the drawings and is with reference described in detail on the drawings.

It demonstrate:

1 a simplified schematic side view of a first embodiment of a device according to the invention in conjunction with a safety system in the form of a biased coil spring,

2 a side view of the device of 1 .

3 a perspective view of the device of 1 respectively. 2 .

4 a partially cutaway front view of the device of 3 .

5 a front view of the device of 3 .

6 a rear view of the device of 3 .

7 a simplified side view of a second embodiment of a device according to the invention,

8th a longitudinal cross-sectional view through a hook element or a base element 7 , and

9 a simplified side view of the device according to the invention in a further embodiment.

1 shows a simplified principle side view of a device according to the invention 1 in conjunction with a security system 2 in the form of a biased coil spring. The coil spring 2 is in a socket 3 inserted and protrudes with its upper end from the socket 3 out. The device 1 includes a hook element 4 and a base element 5 that have a connection point 6 are releasably connected together. The basic element 5 indicates at its the junction 6 opposite end a hook 7 on. In the same way, the hook element 4 at its the junction 6 opposite end a hook 8th on. In 2 is the device 1 shown in a side view. The basic element 5 is with his hook 7 in a retaining flange 9 hung on the outside of the socket 3 is provided in the bottom area. The hook element 4 is with his hook 8th at an upper lateral edge 2a the coil spring 2 hooked.

The connection of hook element 4 and base element 5 via a wire element 16 holding the two holding parts 4 . 5 with several turns 18 wrapped, as in particular in 2 to recognize, so that this of the wire element 16 are entwined. Is in the parts 4 . 5 a groove for receiving the turns 18 provided, few turns 18 suffice. But it is possible, many turns 18 adjacent to each other and possibly. Also partially overlapping provided. The wire element 16 has in this case a round cross-section. For better attachment to the parts 4 . 5 However, the wire may also have a rectangular cross-section. From the of the wire element 16 wrapped joint 6 stand two sections 17 of the wire element 16 as contacts from, to which an electrical voltage can be applied. When a voltage is applied, the wire element melts 16 especially in the area of the connection point 6 so that the connection between the parts 4 . 5 is canceled. For this purpose, the wire element in the region of the wrapping can have a tapered cross-section, or a better fusible alloy than the sections 17 ,

In a starting position of the device 1 or the hook element 4 is the hook element 4 with the base element 5 connected. The length of the device 1 is on a length of the coil spring 2 when squeezed under bias and put into the socket 3 is inserted, adjusted so that the device 1 at the upper end of the coil spring 2 hinged hook element 4 the coil spring 2 Reliable under bias holds. In the 1 is with one Arrow F indicates the force caused by the bias of the coil spring 2 on the device 1 and in particular the joint 6 between hook element 4 and base element 5 is exercised. By a thermal activation of the hook element 4 or the connection point 6 between hook element 4 and base element 5 becomes the connection between hook element 4 and base element 5 dissolved, so that afterwards the coil spring 2 in the direction of the force F can relax upward. The coil spring 2 actuates this upward movement of a mechanical system (not shown) performing a safety function, for example in connection with active hoods for pedestrian protection, rollover bars in cabriolet vehicles, occupant protection head restraints and / or seat belt pretensioners the proactive occupant protection of vehicles.

The device according to the invention 1 not only with a security system 2 in the form of a coil spring but also in similar safety systems which are biased in a deactivated initial state. These include, for example, gas piston, magnetic piston or the like.

The following is with reference to the 3 to 6 one in addition to the wire element 16 provided further connection of the hook element 4 and the base element 5 and their release from each other by a thermal activation explained in detail, wherein the wire element 16 each is not shown.

In 3 is the device 1 shown in a perspective view. In the area of the junction 6 has the base element 5 a connection section 10 on, which is substantially perpendicular to the longitudinal axis of the base member 5 extends. The basic element 5 may be made of a thermoplastic, for example a polyamide 66 , On a surface of the connecting portion 10 are two tracks 11 applied in the form of metal tongues, which may for example consist of brass or coated copper. These metal tongues 11 are in the connection section 10 embedded so that its surface is substantially flush with a surface of the connecting portion 10 concludes. In the top view of 4 It can be seen that the respective upper ends of the metal tongues by a metal wire 12 are connected. This metal wire 12 is made of high resistivity metal, for example, constantan or a metal with similar properties. The metal wire 12 is in a meandering recess of the connecting portion 10 embedded and thus also substantially flush with the surface of the connecting portion 10 from. For simplicity, in 4 the hook element 4 transparent and shown only in its outlines, leaving the underlying metal wire 12 and the upper ends of the metal tongues 11 are recognizable. The connecting section 10 of the base element 5 thus forms for the metal tongues 11 and the metal wire 12 a support element on which these elements are mounted. In 5 is the device 1 in a front view, and in 6 shown in a view from behind.

The hook element 4 is with his the hook 8th opposite end on the connecting portion 10 glued, namely exactly in the area of the metal wire 12 ( 4 ). Thus, the hook element 4 and the base element 5 positively connected with each other. In the glue, the hook element 4 with the base element 5 glued, a substance is mixed, which decomposes with the addition of heat energy. Such a substance is also known by the term "blasting powder" or black powder. The perspective view according to 3 or an in 5 shown front view represent the device 1 in an initial state, in which the hook element 4 on the connecting section 10 of the base element 5 is glued. This bond is on tensile force acting in the longitudinal direction of hook element or base element claimable, so that the device 1 is capable of the coil spring 2 in the prestressed position as shown by 1 to keep.

If to the metal tongues 11 A voltage is applied through the current passing through the metal wire 12 flows, generates a defined Joule heat, which forms the connecting section 10 in the area of the metal wire 12 specifically heated. With this heating, a predetermined activation energy for the blasting powder is exceeded, so that the blasting powder is ignited, and thereby the hook element 4 from the base element 5 "blown away" is. After this release of the hook element 4 from the base element 5 is the hook element 4 no longer capable of that of the coil spring 2 applied force to oppose a counterforce, so that the coil spring 2 in the direction of in 1 shown force F can move.

After a release of the coil spring 2 allows them to move back to their pre-tensioned position without great effort, and in particular without special tools, by inserting them into the socket 3 is pressed back and then by hooking a new device in the retaining flange 9 or to the upper side edge of the coil spring 2 is held under pretension. It is understood that in the new device 1 the hook element 4 in its initial state as explained above with the base element 5 is connected to that of the coil spring 2 applied force down into the retaining flange 9 initiate or compensate.

In the 7 is another embodiment of the device 1 illustrated in principle simplified, in which the wire element is not shown. In this case, the hook element and the base element at the connection point 6 each a toothed section 13 on, which are in the initial state with each other. The initial state of the device 1 is in 7 shown with solid solid lines. Due to the positive connection of hook element 4 and base element 5 is it possible to use the coil spring 2 in the in 1 shown position under bias, as a sliding of hook element 4 and base element 5 is prevented from each other in the longitudinal direction.

If, for example, the base element 5 is made of a memory metal or a bimetal, a release of the hook element 4 from the base element 5 by thermally activating the joint 6 between hook element and base element 5 be achieved. As a result of this thermal activation, the base element deforms 5 in the direction of the arrow a to the outside and away from the hook element 4 , what in 7 indicated by dashed lines. In this deformation outward enter the toothed sections 13 of hook element 4 and base element 5 disengaged, leaving the hook element 4 after releasing the force F from the coil spring 2 exercised, can not oppose any opposing force. Thus, the coil spring can 2 in the direction of force F as in 1 shown move up to trigger the safety function. The wire element 16 is additionally stressed by the movement generated, so that when energy is supplied, the connection due to the wire element 16 is quickly repealed.

In the embodiment according to 7 can the toothed sections 13 of the hook element 4 and the base element 5 additionally glued together. By using a blasting powder which is mixed into the adhesive, hook element 4 and base element 5 be solved very quickly from each other by the blasting powder is ignited. The activation energy required for the ignition can either be supplied by a sufficient thermal energy from the outside, or alternatively by applying a voltage to a metal wire, which is additionally provided in the region of the toothed areas. The operation of such a metal wire is with reference to 4 explained and therefore not described again to avoid repetition.

In 8th is a section of the base element 5 from the embodiment of 7 shown in a longitudinal cross-sectional view. With the reference number 5a is the side of the base element 5 denotes the hook element 4 is facing. With the reference number 5b is an outside of the base member 5 denotes the hook element 4 is opposite. The base member includes on its outside 5b a plating 14 that with a basic body 15 of the base element 5 is firmly connected. The main body can as in the embodiment of the 1 - 6 be made of a plastic, or consist of a metal. Anyway, the plating points 14 a smaller thermal expansion coefficient than the main body 15 of the base element 5 on and was trained at low temperatures. This has the consequence that the plating 14 deformed during heating due to the bimetal effect to the outside while the body 15 forcibly deformed. As a result, when the plating is heated, the base member deforms 5 as a whole in a direction away from the hook element 4 , as in 7 indicated by dashed lines away.

The basic element 5 may also be made of a metal exhibiting an austenitic / martensitic twinning crystal transition above a service temperature and having been cooled below the phase transition temperature using a bending stress. Such a treatment is known as "training", such metal then being referred to as memory metal. After heating to a temperature above the phase transition temperature, the base element then spreads 5 in a predetermined direction, that is, in the direction of the arrow a of 7 , So if the base element 5 is made of a bimetal or a memory metal is by heating a deformation as in 7 shown by dashed lines, so that thereby the hook element 4 from the base element 5 is solved.

The hook element 4 may have the same construction as the base member with respect to a bimetal cladding 5 according to 8th , with the difference that then the plating on a the base element 5 opposite side of the hook element 4 is provided. This then has the consequence that the hook element 4 deformed due to the thermal activation, namely away from the base member 5 , The effect in relation to the junction 6 is then the same: the toothed sections 13 of hook element 4 and base element 5 get out of engagement, so these two elements 4 . 5 are solved from each other. This is the coil spring 2 with her upper margin 2a in the direction of the force F ( 1 ) movable.

In 9 is in a side view in principle simplified another embodiment of the device 1 shown. In this case, the device comprises 1 only a hook element 4 that is directly connected to the retaining flange 9 on an outside of the socket 3 connected so that the socket 3 here serves as a base element. In the preloaded position of the coil spring 2 is the hook element 4 with his hook 8th with an upper margin 2a the coil spring 2 in contact and thereby holds the coil spring 2 under tension. In contrast to the embodiment according to 1 embraces the hook 8th according to 8th not the top margin 2a the coil spring 2 but is only slightly on it. In the embodiment according to 9 is the hook element 4 made of a bimetal or a memory metal, analogously to the explanation of 8th , This has the consequence that with a thermal activation of the hook element 4 or whose heating causes a deformation to the outside, as in 9 shown by dashed lines. As a result, the hook slides 8th of the hook element 4 from the top margin 2a the coil spring 2 so that it can move in the direction of the force F to perform the safety function. It can be seen that the wire element 16 the hook element 4 and the socket 3 wrapped.

The device in the embodiment according to 9 has the advantage of having the security system 2 in the form of the coil spring without special tools and without replacement of parts in its initial state, in which the coil spring 2 held under pretension, lets move back by the hook 8th of the hook element 4 after its cooling again with the upper margin 2a the coil spring 2 is brought into contact. The deformation of the hook element 4 due to the thermal activation is as often as reversible. The device in the embodiment according to 7 has the same advantage because the coil spring 2 can be pushed back to their biased state after their release and then by an assembly of hook element 4 and base element 5 is held in the prestressed state. Furthermore, all of the aforementioned embodiments have the advantage that the device 1 due to the orientation of the hook element 4 and possibly the base element 5 essentially parallel to the coil spring 2 only a small installation space required.

The invention has been explained above with reference to embodiments in which in addition to the connection with the wire element 16 further connections are provided. It is understood that the connections of the hook element 4 with the security system 2 also alone by the wire element 16 can be done, leaving only this connection 6 to release the security system 2 must be lifted or resolved.

The invention above is also based on hook elements 4 been described, attached to a base element 5 respectively. 3 are set, the connection targeted to release the security system 2 can be canceled. It is understood that in this case the hook element 4 however, may be displaced and / or pivoted by means not shown, for example by means of a slot or a pivot joint, to prevent the released part 4 under the bias of the spring 2 is accelerated uncontrollably.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 3,4238 [0006]
• - DE 7712696 U1 [0007]
• US 5788212 A [0008]
• - US 4176718 [0009]
• US 5695306A [0010]
• US 5695306 [0010]

Claims (26)

Contraption ( 1 ) for holding a biased security system ( 2 ) comprising a hook element ( 4 ), which in an initial state with a part ( 2a ) of the security system ( 2 ) is engageable thereby causing the security system ( 2 ) and a security system ( 2 ) associated with the hook element ( 4 ) connected base element ( 3 ; 5 ), wherein the connection between the hook element ( 4 ) and the base element ( 3 ; 5 ) is detachable by a thermal activation, wherein the part ( 2a ) of the security system with which the hook element ( 4 ) in its initial state, is movable by releasing the connection, characterized in that the hook element ( 4 ) and the base element ( 3 ; 5 ) are interconnected by a wire element, with which the hook element ( 4 ) and the base element ( 3 ; 5 ) are wrapped together that the wire element by supplying thermal and / or electrical energy meltable and thus the connection between hook element ( 4 ) and basic element ( 3 ; 5 ) is solvable. Contraption ( 1 ) according to claim 1, wherein the hook element ( 4 ) elongated and with its longitudinal axis substantially parallel to the security system ( 2 ) is arranged. Contraption ( 1 ) according to claim 1 or 2, wherein the hook element ( 4 ) by the thermal activation of the security system ( 2 ) is moved away, so that the hook element is disengaged from the part of the security system. Contraption ( 1 ) according to claim 3, wherein the hook element ( 4 ) is at least partially made of a memory metal or a bimetal. Contraption ( 1 ) according to one of claims 1 to 4, in which the base element ( 5 ) is elongated and whose longitudinal axis with the longitudinal axis of the hook element ( 4 ) is aligned. Contraption ( 1 ) according to claim 5, wherein the hook element ( 4 ) and the base element ( 5 ) each have a toothed section ( 13 ), which sections a positive connection of hook element ( 4 ) and basic element ( 5 ) in the initial state. Contraption ( 1 ) according to claim 6, wherein the base element ( 5 ) and / or the hook element ( 4 ) are at least partially made of a memory metal or a bimetal, so that these elements move away from each other by the thermal activation and thereby the positive connection of the toothed portions ( 13 ) will be annulled. Contraption ( 1 ) according to one of claims 1 to 4, in which the base element is a housing part, in particular a bushing ( 3 ) of the security system ( 2 ). Contraption ( 1 ) according to one of claims 1 to 8, wherein the wire element is made of a metal wire with high resistivity, so that the wire element generates Joule heat upon supply of electrical energy and thereby melts. Contraption ( 1 ) according to one of claims 1 to 9, in which the hook element ( 4 ) and the base element ( 5 ) are glued together. Contraption ( 1 ) according to claim 10, in which the adhesive bond ( 6 ) can be canceled by an applied electrical voltage. Contraption ( 1 ) according to claim 10 or 11, wherein the adhesive bond ( 6 ) Withstands a bias voltage. Contraption ( 1 ) according to one of claims 10 to 12, in which at the connection point ( 6 ) between hook element ( 4 ) and basic element ( 5 ) a metal wire ( 12 ) is provided with high resistivity, the converted electrical energy into Joule heat, thereby melting the adhesive and the adhesive bond between hook element ( 4 ) and base element is released. Contraption ( 1 ) according to one of claims 10 to 13, wherein at the contact surface between the hook element ( 4 ) and the base member, a substance which decomposes with the addition of heat energy is provided. Contraption ( 1 ) according to claim 14, wherein the substance is mixed in the adhesive. Contraption ( 1 ) according to claim 14 or 15, wherein at the contact surface between the hook element ( 4 ) and the base element a metal wire ( 12 ) is provided with high resistivity, the converted electrical energy into Joule heat and thereby causes a decomposition of the substance, so that the hook element ( 4 ) and the base element are separated from each other. Contraption ( 1 ) according to any one of claims 10 to 16, at which the adhesive bond ( 6 ) two abutting surface portions of the hook element ( 4 ) and the base element ( 3 ; 5 ) connects. Contraption ( 1 ) according to one of Claims 10 to 17, in which an electrical voltage is applied to the adhesive bond ( 6 ) mixed substance ignites and the reaction resulting from this dissolves the adhesive bond. Contraption ( 1 ) according to claim 18, wherein the ignition triggers a kind of blasting of the substance. Contraption ( 1 ) according to one of claims 10 to 19, in which two contactable interconnects ( 11 ) from the connecting section ( 10 ) with the adhesive bond ( 6 ) protrude. Contraption ( 1 ) according to one of claims 1 to 20, wherein the thermal activation is effected by supply of thermal energy. Contraption ( 1 ) according to one of claims 1 to 20, in which the thermal activation takes place by the supply of electrical energy contained in a metallic conductor ( 12 ) is converted into Joule heat with high specific resistance. Method for making a cancelable connection ( 6 ) between a first holding part ( 4 ) and a second holding part ( 5 ), in which the two holding parts are looped together by a wire element, characterized in that the application of an electrical voltage to the wire element cancels the connection. A method according to claim 23, characterized in that a repositionable adhesive bond ( 6 ) between a first holding part ( 4 ) and a second holding part ( 5 ) is provided, wherein in the adhesive of the adhesive bond ( 6 ) a substance is mixed in, which cancels the adhesive bond by applying an electrical voltage. Method for quickly releasing a connection ( 6 ) between a first holding part ( 4 ) and a second holding part ( 3 ; 5 ), in which the two holding parts are wrapped together by a wire element, characterized in that the connection is canceled by applying an electrical voltage. A method according to claim 25, characterized in that a liftable adhesive bond ( 6 ) between a first holding part ( 4 ) and a second holding part ( 5 ) is provided, wherein in the adhesive of the adhesive bond ( 6 ) a substance is mixed, and that by applying an electrical voltage, the adhesive bond is released.