Corner connector, frame fixture, frame, protective structure, and assembly kit

Abstract

Corner connector (16) for connecting two profile strips (10, 20) of a frame (12), in particular an insect screen frame, comprising a first profile strip interface (14) for the positionally fixed connection of a first profile strip (10) of the two profile strips (10, 20) with the corner connector (16), and a second profile strip interface (24) for the positionally fixed connection of a second profile strip (20) of the two profile strips (10, 20) with the corner connector (16) at an angle relative to the first profile strip (10), characterized in that at least the first profile strip interface (14) is designed to form a fitting connection with the first profile strip (10) that is different from an interference fit.

Description

State of the art

[0001] The invention relates to a corner connector according to the preamble of claim 1, a frame device according to claim 20, a frame according to claim 21, a protective structure according to claim 22 and a kit according to the preamble of claim 23.

[0002] Insect screens with a frame, which are installed in window openings or the like, are known from the prior art. Such frames typically comprise several profile strips connected to each other via corner connectors to form a continuous frame structure. To create the connection between the profile strips and the corner connectors, it is known to press the profile strips into corresponding press-fit recesses in the corner connectors during assembly. This design often requires comparatively high assembly forces, so on-site installation can be perceived as strenuous. In many cases, the use of tools, such as a hammer, is necessary.Furthermore, a connection based solely on press fits regularly makes non-destructive disassembly of the profile strips from the corner connector difficult, as the profile strips can only be removed after being pressed in with considerable force or by damaging the components involved. Alternatively, corner connectors are sometimes delivered with pre-assembled, pressed-in profile strips. However, this can result in bulky and unwieldy packages, which are particularly disadvantageous for shipping and may no longer be transportable by standard shipping providers.

[0003] The object of the invention is, in particular, to provide a generic device with advantageous properties regarding simple assembly and / or compact packaging. This object is achieved according to the invention by the features of the independent and dependent claims, while advantageous embodiments and further developments of the invention can be found in the dependent claims. Advantages of the invention

[0004] The invention relates to a corner connector for connecting two profile strips of a frame, in particular an insect screen frame, comprising a first profile strip interface for the position-fixed connection of a first profile strip of the two profile strips with the corner connector, and a second profile strip interface for the position-fixed connection of a second profile strip of the two profile strips with the corner connector at an angle relative to the first profile strip.

[0005] It is proposed that at least the first profile strip interface be designed as a fit-fit connection with the first profile strip, different from a press fit. This advantageously enables a particularly flexible and / or easy-to-assemble connection of two profile strips of a frame, especially an insect screen frame. The first and second profile strip interfaces allow the profile strips to be connected to the corner connector in a positionally fixed manner, resulting in a stable frame corner when assembled. Because at least the first profile strip interface is designed as a fit-fit connection with the first profile strip, different from a press fit, the first profile strip can be advantageously attached in a positionally fixed manner without high assembly forces and without pressing it into the corner connector.This simplifies assembly, especially on-site, reduces the risk of damage to the profile strip or corner connector, and allows for a detachable connection that can be separated again if necessary. At the same time, the second profile strip interface advantageously allows for an angled, fixed connection of the second profile strip to the corner connector relative to the easily assembled first profile strip. The combination of a non-press-fit connection at the first profile strip interface and an angled, fixed connection at the second profile strip interface enables a modular frame design that effectively combines ease of assembly with mechanical stability.Advantageously, the frame can be delivered with only partially pre-assembled corner connectors (only with pre-assembled second profile strip interfaces), especially since the first profile strips can be easily and / or tool-free assembled on site. This advantageously reduces overall manufacturing, assembly, and / or logistics costs. In particular, compared to two-part corner connectors, whose individual parts are each connected to one of the profile strips, the proposed corner connector, which has a one-piece, especially monolithic, base body, is advantageously simpler and / or more cost-effective to manufacture.

[0006] A corner connector is understood to be, in particular, a frame component designed to connect two profile strips of a frame and to arrange them at a defined angle to each other. A profile strip interface is, in particular, a region formed on the corner connector that is configured to engage mechanically with a profile strip, preferably such that the profile strip is held in a defined position relative to the corner connector. The profile strip interfaces can each be formed as a recess in a base body of the corner connector, but are preferably each formed as projections / extensions that protrude from the base body of the corner connector. The two profile strip interfaces are preferably formed at least partially integrally, and in particular monolithically, with a base body of the corner connector.The corner connector preferably has an outer shape resembling an angle, with one of the profile strip interfaces located at each of the angle ends. A fixed connection exists, in particular, when the profile strip, in the assembled state, is secured against relative movement to the corner connector or to the other profile strip connected to the corner connector, at least in the degrees of freedom relevant for the stability of the frame. The term "angled" refers in particular to an arrangement in which the second profile strip is aligned relative to the first profile strip at an angle other than zero degrees, preferably at least 30 degrees and at most 150 degrees, more preferably at least 45 degrees and at most 135 degrees, advantageously at least 60 degrees and at most 120 degrees, particularly advantageously at least 80 degrees and at most 100 degrees, and most preferably at approximately 90 degrees.Preferably, the two profile strips connected by the corner connector run in a common frame plane when properly connected to the corner connector. In particular, the two profile strip interfaces span the common frame plane.

[0007] A fit connection other than an interference fit preferably refers to a fit connection in which the holding effect between the profile strip and the corner connector is not generated by a geometric interference of the connected components. An interference fit is understood in particular to be a fit connection in which a component with an interference fit is inserted into a receptacle of another component, such that the connection is created by elastic and / or plastic deformation of the components themselves, i.e., the plastic part of the corner connector or the first profile strip interface. The interference fit is preferably an interference fit / an interference fit.The fitting connection, which differs from an interference fit, can include, in particular, a transition fit, a clearance fit, a detent fit, a clamping connection without geometric interference, a wedge fit, an expansion fit (not interference-based) in which an expansion element generates a holding force only in the assembled state, a magnetically supported fit in which at least part of a holding force is generated by a magnet, or a combination thereof. The fitting connection is preferably designed as a clearance fit or transition fit as defined in DIN EN ISO 286.A tolerance field of the profile strip interface providing a fitting connection different from the press fit lies in the shaft base system according to DIN EN ISO 286 preferably within the basic dimensions h to j, provided that the profile strip interface is designed as a projection, or within the basic dimensions H to J, provided that the profile strip interface is designed as a recess.

[0008] In addition to the first profile strip interface, the second profile strip interface could also be configured as a fit connection with the first profile strip, different from a press fit. The second profile strip interface could be at least substantially identical to the first profile strip interface. Preferably, however, it is proposed that the second profile strip interface, in addition to being angled relative to the first profile strip interface, be designed differently from the first. This allows the first and second profile strip interfaces to be advantageously optimized for different connection concepts, assembly processes, or load situations.For example, one of the profile strip interfaces can be designed for easy assembly, while the other profile strip interface primarily ensures particularly dimensionally stable and precise angular alignment of the profile strips. Furthermore, the assembly of the profile strips can be simplified by providing a clear assignment to specific profile strip interfaces. Additionally, a pre-assembled profile strip-corner connector combination can be advantageously provided, to which the next profile strip can be attached in a particularly simple manner.The term "constructively different" preferably refers to a design in which the first profile strip interface and the second profile strip interface differ from each other in their geometric design, their structural execution, and / or their structural arrangement, but in particular without calling into question the fundamental function of the fixed connection. For example, the first profile strip interface may be designed with a first geometric contour, while the second profile strip interface has a different second geometric contour, so that the profile strip interfaces are constructively different and the second profile strip is also arranged at an angle to the first profile strip.

[0009] Furthermore, it is proposed that the second profile strip interface has a functionally different connection mechanism than the first profile strip interface. This advantageously allows for targeted functional differentiation of the connection between the profile strips and the corner connector without requiring different corner connectors. A significant advantage of this design is that the first and second profile strip interfaces can each be designed to meet different functional requirements. For example, one profile strip interface can primarily enable a user-friendly and detachable connection, while the other profile strip interface ensures a particularly stable, durable, or precisely positioned connection of the associated profile strip.A connection mechanism refers in particular to the entirety of the design and functional features of a profile strip interface by which the connection between the profile strip and the corner connector is established and maintained. The term "functionally different" refers in particular to a design in which the connection mechanisms of the first profile strip interface and the second profile strip interface differ from one another with regard to their mode of operation, their assembly characteristics, and / or the type of holding effect generated, preferably even if individual design features may be the same.In one embodiment, the connection mechanism of the first profile strip interface is designed such that the first profile strip can be connected to the corner connector without high assembly forces, while the connection mechanism of the second profile strip interface has a different mode of operation, in particular a connection requiring high assembly forces, to create the positionally fixed connection of the second profile strip. The connection mechanisms of the first and second profile strip interfaces can differ, in particular, in that they exhibit different assembly movements, different holding principles, or different directions of action of the holding forces.In particular, the first profile strip can be designed for manual assembly via the first profile strip interface, while the second profile strip is pre-assembled via the second profile strip interface and connected to the corner connector with a particularly strong and secure bracket. It is even conceivable that the (pre-assembled) second profile strip is glued or otherwise bonded to the corner connector at the second profile strip interface. This significantly simplifies on-site assembly without compromising the stability and secure mounting of the pre-assembled profile strip. Specifically, the combination of a manually assembled connection and a permanently pre-assembled connection allows for efficient prefabrication and compact provision and handling of the components, while still ensuring high mechanical stability of the frame in its assembled state.

[0010] These advantages can be achieved particularly well when the second profile strip interface is designed as an interference fit with the second profile strip. A further significant advantage of this design is that the second profile strip is reliably and play-free connected to the corner connector via the interference fit, ensuring high stability of the frame corner even under mechanical stress, for example, during transport, pre-assembly, or operation of the frame. By combining the interference fit at the second profile strip interface with the non-interference fit at the first profile strip interface, a corner connector is provided that offers both high structural strength and ease of assembly.In particular, the second profile strip can be permanently and dimensionally stable pre-assembled, while the first profile strip is only fixed in position and connected to the corner connector during final assembly.

[0011] Furthermore, it is proposed that at least the first profile strip interface, and preferably also the second profile strip interface, comprise a projection, in particular a plug-in projection, extending from a central area of ​​the corner connector. This projection is designed to be, when mounted to the associated profile strip, at least largely recessed into a receptacle or cavity of the associated profile strip. This advantageously achieves a particularly stable connection between the profile strip and the corner connector. The projection allows, in particular, a reliable transmission of forces between the profile strip and the corner connector, enabling the construction of a stable frame. The proposed design also advantageously simplifies assembly, as the projection defines a specific insertion movement of the profile strip.The central area of ​​the corner connector refers in particular to a section of the corner connector between the two profile strip interfaces. The central area of ​​the corner connector forms, in particular, the base body of the corner connector. A projection, in particular a plug-in projection, refers in particular to a section of the corner connector projecting from the corner connector or its base body, which is designed to be inserted into a profile strip in order to create the fixed connection between the profile strip and the corner connector. The term "recessed" refers in particular to a condition in which the projection is arranged at least predominantly within the profile strip, so that it is at least partially surrounded by the profile strip. The recess or cavity of the profile strip refers in particular to a region formed within the profile strip that is designed to at least partially receive the projection.A "large part" is understood to mean at least 51%, preferably at least 66%, preferably at least 85%, and particularly preferably at least 95%. "Provided for" is understood to mean, in particular, specifically programmed, designed, and / or equipped. The fact that an object is provided for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state. In particular, the extension is elongated. The recess or cavity of the respective profile strip is preferably designed to be complementary to an outer shape of the respective extension.

[0012] Furthermore, it is proposed that the first profile strip interface be designed such that the first profile strip can be connected to the corner connector without the use of a tool and / or that the first profile strip interface allows for tool-free assembly of the fitting connection with the first profile strip. This enables particularly simple and user-friendly assembly of the frame, which can also be carried out by inexperienced users (e.g., private individuals who want to assemble the frame themselves). The term "tool-free" preferably refers to a design in which the connection of the profile strip to the corner connector can be made without the use of separate tools, in particular without the use of hand tools such as a hammer or other tapping or striking tool. Preferably, the first profile strip can be connected to the first profile strip interface by hand.The second profile strip interface, on the other hand, could be designed in such a way that it can only be detached from the second profile strip using a tool, or that it can be initially mounted with the second profile strip.

[0013] Alternatively or additionally, if the first profile strip interface is designed such that the first profile strip can be connected to the corner connector in a positionally fixed manner without the use of a screw, rivet, or bolt, a particularly simple and quick connection between the profile strip and the corner connector can be advantageously achieved. Furthermore, the number of individual parts to be assembled is advantageously reduced, which decreases the assembly effort and minimizes the risk of assembly errors, for example, due to missing or incorrectly installed fasteners. A screw refers in particular to a fastener that creates a connection between two components by means of a thread. A rivet refers in particular to a fastener that creates a permanent mechanical bond between components through plastic deformation.A bolt refers in particular to a rod-shaped fastening element intended for the form-fit or force-fit connection of components. The second profile strip interface, on the other hand, could be designed such that it can only be detached from the second profile strip by means of a screw element, a rivet and / or a bolt, or can only be initially mounted to the second profile strip.

[0014] Alternatively or additionally, if the first profile strip interface is designed such that the first profile strip can be connected to the corner connector without a bonded joint, a particularly flexible and easy-to-assemble connection between the profile strip and the corner connector can be advantageously achieved. In particular, the need for adhesives, welding, or soldering processes is eliminated. The connection can therefore be made directly, without waiting times or additional process steps. Furthermore, the bonded connection without a bonded joint advantageously allows for non-destructive separation of the profile strip from the corner connector. This significantly facilitates disassembly, replacement of individual profile strips, or subsequent adjustments to the frame and increases the reusability of the components.The term "material-bonded joining" refers in particular to a joining process in which the components to be joined are connected by material bonding, especially by gluing, welding, or soldering. The second profile strip interface, however, could be designed in such a way that it is materially bonded to the second profile strip.

[0015] Furthermore, it is proposed that the first profile strip interface, particularly for creating and / or securing the positional fixation generated by the interference fit (other than an interference fit), comprises an elastic element, preferably a spring element, which is designed to exert a permanent compressive force on at least one, particularly an inner, surface of the associated profile strip when it is mounted to the profile strip. This advantageously and reliably creates and / or secures the positional fixation generated by the interference fit (other than an interference fit). The permanent compressive force of the elastic element advantageously allows for a backlash-free connection of the first profile strip to the corner connector without requiring an interference fit.An elastic element refers in particular to a component or component section that is elastically deformable under load and returns, at least largely, to its original shape after unloading. A permanent compressive force refers in particular to a force that is permanently exerted by the elastic element in the assembled state of the profile strip, without requiring continuous external actuation. An internal surface of the profile strip refers in particular to a surface of the profile strip that, in the assembled state, faces the cavity or the receptacle of the first profile strip. The creation and / or securing of the position fixation refers in particular to creating and / or maintaining a state in which the profile strip is held in a positionally fixed position relative to the corner connector. Apart from the elastic element, the corner connector is preferably a monolithic plastic part.The elastic element is preferably positively connected to the base body of the corner connector and / or to an extension of the corner connector forming the first profile strip interface.

[0016] It is further proposed that the elastic element be designed such that a principal direction of action of the compressive force exerted by the elastic element is oriented transversely, preferably perpendicularly, to an assembly direction defined by the profile strip interface for mounting the associated profile strip to the corner connector and / or to a longitudinal extension of a frame side of the frame, which is to be formed by the associated profile strip. This advantageously achieves a particularly effective securing of the fixed connection between the profile strip and the corner connector. The principal direction of action of the compressive force refers in particular to the direction in which the predominant portion of the force exerted by the elastic element acts on the profile strip. The assembly direction refers in particular to the direction in which the profile strip is moved relative to the corner connector during assembly in order to establish the fixed connection.The longitudinal extent of a frame side refers specifically to the direction in which a frame side formed by a profile strip has its greatest extent when assembled. The elastic holding force does not act predominantly parallel to the principal direction of extension of the respective profile strip. The "principal direction of extension" of an object is understood to be, in particular, a direction that runs parallel to the longest edge of the smallest geometric cuboid that just completely encloses the object.

[0017] Furthermore, it is proposed that the elastic element be designed such that a principal direction of action of the compressive force exerted by the elastic element is oriented transversely, preferably perpendicularly, to a principal plane of extension of the corner connector, in particular of the frame that can be formed, among other things, by the corner connector. This advantageously achieves a particularly effective securing of the fixed connection between the profile strip and the corner connector. The elastic holding force does not act predominantly parallel to the frame plane. A "principal plane of extension" of a structural unit is understood to be, in particular, a plane that is parallel to a largest side face of the smallest imaginary cuboid that just completely encloses the structural unit, and in particular passes through the center of the cuboid.The term perpendicular to the principal extension plane refers to an orientation that deviates from the principal extension plane, in particular an orientation perpendicular to the principal extension plane.

[0018] It is further proposed that the elastic element be a metal spring. This achieves a particularly reliable and durable elastic effect for creating and / or securing the fixed connection between the profile strip and the corner connector. Metal springs are advantageously resistant to environmental influences such as temperature changes, humidity, and aging. This is particularly beneficial for frame devices used in window openings where fluctuating climatic conditions can occur. The metal spring also allows for a precise design of the spring characteristic curve, so that the compressive force exerted by the metal spring can be specifically adapted to the respective profile strip geometry and the desired holding effect.A metal spring is, in particular, an elastic component made of a metallic material that is elastically deformable under load and returns, at least largely, to its original shape after the load is removed. Specifically, when assembled, the metal spring is compressed by the side walls of the first profile strip and consequently presses continuously against these compressing side walls from the inside. In particular, when the frame is assembled, the metal spring is at least largely covered / surrounded by the first profile strip. Alternatively, the elastic element could also be made of an elastomer or another elastic material. Elastomers could provide an additional damping effect. Plastic springs or multi-component components are also conceivable as elastic elements in principle.

[0019] If the elastic element is a tongue spring or a leaf spring, a particularly space-saving and structurally simple design can be advantageously achieved, which integrates particularly well into the profile strip interface. A further advantage of designing the elastic element as a tongue spring or leaf spring is that targeted elastic deformation in a defined direction can be achieved. This allows the compressive force exerted by the elastic element to be precisely aligned with the desired surface of the profile strip, thereby reliably creating and / or securing the fixed connection. Furthermore, tongue springs and leaf springs enable one-sided elastic support of the profile strip at the corner connector. This simplifies the installation of the profile strip. A tongue spring, in particular, refers to an elastic element that is elongated, possibly...A leaf spring is a section that is only attached on one side and is elastically deflectable under load. In particular, a leaf spring is an element that is at least substantially planar and elastically deformable, which bends elastically under load and returns at least largely to its original shape after the load is removed. In a preferred embodiment, the leaf spring or spring tongue acts on one side only, so that a compressive force exerted by the elastic element acts on the profile strip essentially from one side when it is mounted. The leaf spring or spring tongue is preferably arranged on an inside side of the frame, particularly on a side facing away from a visible side of the frame.This allows the elastic element to be arranged in a visually unobtrusive manner when assembled and at the same time protected against external influences, while the fixed connection of the profile strip with the corner connector remains reliably ensured.

[0020] Furthermore, it is proposed that the elastic element be positively connected to the corner connector, particularly to the first profile strip interface. Advantageously, this achieves a reliable and positionally stable arrangement of the elastic element on the corner connector. Especially in the assembled state, the elastic element is held securely in position on the corner connector without the need for additional fasteners or bonding methods. The term "positively connected" refers specifically to a connection in which the holding effect is generated by the interlocking of corresponding geometric shapes of the connected components, thus preventing relative movement, at least in certain directions.In one embodiment, the elastic element is inserted into a recess formed on the corner connector, preferably in the area of ​​the first profile strip interface, and is held in a form-fitting manner by corresponding contours.

[0021] Furthermore, it is proposed that the elastic element be arranged entirely within an area of ​​the first profile strip interface, which is designed to be covered and / or enclosed by the profile strip when the corner connector is mounted to the associated profile strip. This advantageously achieves a particularly compact and protected, as well as highly effective, arrangement of the elastic element. In particular, the elastic element is not visible from the outside when mounted.

[0022] Furthermore, it is proposed that the elastic element has an elongated central section with a curved profile and an angled end section at at least one longitudinal end, preferably at both longitudinal ends, wherein the end section(s) are designed to engage in fastening recesses formed by the profile strip interface. This advantageously achieves a particularly secure and at the same time easy-to-install arrangement of the elastic element on the corner connector. An elongated central section refers in particular to a section of the elastic element, preferably the leaf spring, which extends predominantly along a longitudinal direction and is arranged between two end sections.A curved profile refers in particular to a design in which the central section of the elastic element is not straight but curved, so that an elastic restoring force is generated under load. Preferably, the elastic element in the central section is convexly bent away from the base body of the corner connector and / or from the extension of the corner connector. An angled end section refers in particular to a section of the elastic element that is set off at a larger angle relative to the elongated central section and is preferably designed to engage with a corresponding structure of the corner connector. A fastening recess refers in particular to a depression or contour formed on the corner connector or at the profile strip interface, which is designed to at least partially receive and positively lock an end section of the elastic element.In one embodiment, at least one of the angled end sections is C-shaped or hook-shaped, thus achieving a particularly secure, positive-locking engagement in the mounting recess. The opposite end section can then also be angled, e.g., simply L-shaped, to secure the C-shaped angled end section in its recess.

[0023] Furthermore, it is proposed, particularly as an alternative or additional to the use of the elastic element, that the first profile strip interface, especially for creating and / or securing the positional fixation generated by the fit connection (which differs from an interference fit), comprises a snap-lock element. This element is designed to engage with at least one corresponding snap-lock element of the associated profile strip when mounted to it. This advantageously enables a reliable and / or unambiguously defined creation and / or securing of the positional fixation between the profile strip and the corner connector. A significant advantage of using a snap-lock element is that the positional fixation of the profile strip can be achieved without an interference fit and without additional fasteners.The corner connector could therefore be designed as a completely monolithic piece. Furthermore, the snap-fit ​​connection advantageously allows for controlled assembly with a clearly defined endpoint, signaled, for example, by a tactile or audible click. This simplifies assembly, particularly for inexperienced users, and reduces the risk of incomplete or faulty connections. A snap-fit ​​element refers specifically to a component or component section designed to engage with a corresponding snap-fit ​​element, such as the respective profile strip, by elastic deflection or traversing a contour. A corresponding snap-fit ​​element refers specifically to a snap-fit ​​element that is geometrically and functionally matched to another snap-fit ​​element so that together they can form a snap-fit ​​connection.In one embodiment, the locking element of the first profile strip interface is designed as a spring-elastic locking projection that engages in a corresponding locking window of the profile strip when the profile strip is mounted. The locking element and the elastic element can be provided alternatively to each other or in combination. In one possible embodiment, both the locking element and the elastic element are provided, with the locking element serving in particular to define an end position of the profile strip and the elastic element additionally providing a permanent contact force to secure the position.

[0024] Furthermore, it is proposed that the first profile strip interface, particularly for creating and / or securing the positional fixation generated by the press-fit connection (which differs from an interference fit), comprises a magnetic element designed to engage in an attractive magnetic interaction with at least one corresponding magnetic element of the profile strip or with a material of the profile strip when mounted to it. This advantageously enables reliable creation and / or securing of the positional fixation between the profile strip and the corner connector without the need for an interference fit or additional mechanical fasteners. A significant advantage of this design is that the magnetic interaction provides a holding force that acts without contact and automatically.This advantageously simplifies the installation of the profile strip, as the profile strip automatically moves into a predetermined position when approaching the corner connector and is held there. Furthermore, the use of a magnetic element allows for a detachable connection, where the profile strip can be separated from the corner connector without damage if necessary. A magnetic element is, in particular, a component that generates or reacts to a magnetic field and can thereby provide a magnetic holding force, such as a ferromagnetic element. A corresponding magnetic element preferably refers to another magnetic element or a magnetizable area designed to interact magnetically with a magnetic element. In one embodiment, the magnetic element of the first profile strip interface is (e.g.,A permanently magnet is formed (glued in) which, in the assembled state, interacts with a magnetizable material of the profile strip, or with an element made of magnetizable material attached (e.g., glued) to the profile strip, or with another permanent magnet attached (e.g., glued) to the profile strip. The reverse configuration is also conceivable. The positional fixation created by the fit connection, which differs from a press fit, can be achieved by various holding mechanisms. In particular, an elastic element, a snap-lock element, and / or a magnetic element can be provided for this purpose. In one embodiment, only the elastic element is provided, which creates and / or secures the positional fixation between the profile strip and the corner connector by means of an elastically generated compressive force.In another embodiment, only the locking element is provided, which, by means of a locking mechanism, defines a fixed end position of the profile strip relative to the corner connector. In another embodiment, only the magnetic element is provided, which, through magnetic interaction, provides a holding force between the profile strip and the corner connector. In further embodiments, two of the aforementioned holding mechanisms can be combined. For example, the magnetic element can serve for pre-assembly or positioning of the profile strip, while the elastic element and / or the locking element ensures permanent positional fixation. Likewise, a locking element can be combined with an elastic element, whereby the locking element defines an end position and the elastic element additionally provides a permanent contact force.In a further embodiment, the elastic element, the locking element, and the magnetic element can be combined. In this case, for example, the magnetic element can provide a supporting holding effect during assembly, the locking element can define a specific end position of the profile strip, and the elastic element can provide additional securing of the position through a continuous compressive force.

[0025] Furthermore, it is proposed that the first profile strip interface has an integrated guide channel for a tensioning element intended for clamping a textile or mesh into the frame, while the second profile strip interface is free of an integrated guide channel for the tensioning element. This advantageously achieves a functional differentiation of the profile strip interfaces, which simplifies the assembly and installation of the frame. The tensioning element is advantageously guided only in the profile strip interface that can be manually installed on site. This significantly simplifies the installation of an insect screen encompassing the frame and mesh.

[0026] Furthermore, a frame device, in particular an insect screen frame device, comprising at least the corner connector and at least two profile strips fixed in position to the profile strip interfaces of the corner connector, is proposed. This transfers the technical advantages associated with the corner connector to a complete frame device. Advantageously, a frame design that is easy to assemble yet compact for delivery can be achieved. A frame device is defined as an arrangement of several profile strips and at least one corner connector, which together form part of a frame or are intended to form part of the frame.

[0027] Furthermore, a frame, preferably an insect screen frame, comprising four corner connectors and at least four profile strips, each of which is fixedly connected to at least one of the corner connectors, is proposed. This provides an advantageously stable and easy-to-assemble frame, which is particularly suitable for use as an insect screen frame. Assembly of the frame is advantageously simple, as not all profile strips need to be pressed in with considerable force. At the same time, a high degree of dimensional accuracy and shape stability of the frame is advantageously achieved. The frame can also have more than four profile strips. For example, telescopically guided profile strips can be arranged on two or four sides of the frame, with the outermost profile strips in the longitudinal direction being connected to one of the corner connectors.A frame is defined in particular as a closed, preferably rectangular, circumferential structure formed from several profile strips and corner connectors, designed to hold or support a protective element, such as a net or screen. The frame is specifically designed as an insect screen frame intended for insertion into a building opening, such as a window or door opening. In one embodiment, the frame comprises four corner connectors and four profile strips, each of which is fixed in position at its ends via the profile strip interfaces of the corner connectors. Telescopic versions may, for example, also include six, eight, or more than eight profile strips and four corner connectors.An insect screen frame refers specifically to a frame designed to be installed in or on an opening, particularly a window or door opening, and to accommodate a protective element that prevents or reduces the entry of insects while still allowing air to pass through the opening. Alternatively, the frame could also function as a pollen screen, a sunshade, or the like.

[0028] Furthermore, a protective structure, specifically an insect screen, is proposed, comprising a frame and a protective element clamped within the frame, which can be designed as a net, grid, or textile. This advantageously provides a functional unit that offers both reliable protection and easy assembly and handling. A key advantage of the protective structure is that the protective element is held stably under tension by the frame, while the fixed connection of the profile strips via the corner connectors ensures high dimensional stability of the frame. This allows the protective element to remain reliably in its intended position even under repeated stress, such as from wind or contact.A protective structure refers in particular to an arrangement designed to provide protection against an opening or passageway, especially by means of a protective element held in a frame. A protective element is a planar element designed in particular to be clamped in a frame to provide protection. The protective structure is preferably versatile and can be designed as insect protection, pollen protection, sun protection, or as another type of protective structure in which an air-permeable protective element is held taut in a frame. The term "clamped" preferably refers to a state in which the protective element is held under tension or pre-tension by the frame, so that it is taut and fixed in position. The protective element can, alternatively or additionally, provide protection against insects such as mosquitoes, etc.It should be designed to provide pollen protection, privacy protection, dust protection, or a combination thereof.

[0029] Furthermore, a kit for manufacturing the frame device, preferably the frame and / or the protective structure, is proposed, comprising at least the corner connector with the first profile strip interface and with the second profile strip interface, at least the first profile strip, and at least the second profile strip, wherein the first profile strip is provided separately from the corner connector, and that the corner connector and the second profile strip are provided as a pre-assembled unit, wherein in the pre-assembled unit the corner connector is fixed in position to the corner connector via the second profile strip interface of the corner connector. This provides, in particular, a very easy-to-assemble and logistically advantageous kit for manufacturing a frame device.A key advantage of this kit is that the pre-assembly of the corner connector with the second profile strip provides a secure and stable substructure, while simultaneously allowing for compact and space-saving packaging. The first profile strip can be conveniently attached to the corner connector during final assembly, thus avoiding bulky pre-assembled frame structures. Furthermore, the separation between the pre-assembled unit and the separately supplied profile strip facilitates easy handling during transport, storage, and shipping. In particular, the kit's dimensions can be reduced, making it suitable for standard shipping providers. The kit also simplifies final on-site assembly, especially since the first profile strip can be attached with minimal effort and often without tools.A kit refers in particular to an assembly of several components, preferably delivered together, e.g., in an outer packaging, which are intended to be assembled into a functional device, especially a frame device or a protective structure. A pre-assembled unit preferably refers to an arrangement of at least two separately manufactured components that are already connected to each other before final assembly and, in particular, already within the outer packaging upon delivery. The term "separately supplied" refers to a condition in which a component is not connected to another component but is delivered and / or packaged separately in the same outer packaging.In one embodiment, the kit comprises two pre-assembled units, each consisting of a corner connector and a second profile strip, as well as two first profile strips, which are provided and delivered separately in the same outer packaging and are only connected to the corner connector during final assembly. Preferably, the kit additionally includes the protective element and a cord-shaped pull element or a protective element into which an integrated pull element is already incorporated, e.g., via a hem.

[0030] If the kit includes a common packaging unit, such as a box or bag, which contains at least all the profile strips and corner connectors required for the complete assembly of the frame and / or protective structure, a more manageable and logistically advantageous provision of the kit from which the frame can be assembled can be achieved. In particular, the profile strips and corner connectors can be arranged within the common packaging unit in such a way as to reduce the dimensions of the packaging unit, which facilitates shipping via standard shipping providers and reduces storage costs. The common packaging unit is advantageously the aforementioned outer packaging. A common packaging unit refers in particular to a single package, preferably an outer package, in which several components are contained and transported together.

[0031] Furthermore, a method for assembling a frame is described, wherein in at least one assembly step, at least a first profile strip is connected to a first profile strip interface of a corner connector by creating a fitting connection other than an interference fit, wherein preferably a second profile strip is already connected to a second profile strip interface of the corner connector via a pre-assembled interference fit, or wherein preferably in at least one further assembly step, the second profile strip is connected to the second profile strip interface of the corner connector by creating an interference fit. This advantageously provides a particularly user-friendly method for manufacturing a frame.

[0032] The corner connector, frame device, frame, protective structure, and kit according to the invention are not limited to the application and embodiment described above. In particular, the corner connector, frame device, frame, protective structure, and kit according to the invention may comprise a different number of individual elements, components, and units than specified herein to achieve a functionality described herein. Drawings

[0033] Further advantages become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0034] They show: Fig. 1 a schematic representation of a protective structure designed as an insect screen with a frame composed of frame devices, Fig. 2 a perspective rear view of a corner connector of the frame device, Fig. 3 a perspective view of the corner connector, Fig. 4 a schematic perspective representation of an elastic element of the corner connector, Fig. 5 a schematic flowchart of a procedure for assembling the frame, Fig. 6 a schematic representation of a kit for the manufacture of the frame and / or the protective structure, Fig. 7 a schematic sectional view through part of an alternative frame device with an alternative corner connector and Fig. 8 a schematic sectional view through part of another alternative frame device with another alternative corner connector. Description of the exemplary implementations

[0035] The Fig. Figure 1 shows a schematic representation of a protective structure 72. The depicted protective structure 72 serves as an example of insect protection. The protective structure 72 is designed for attachment to a building opening. The protective structure 72 closes the building opening so that certain objects or animals, e.g., insects and / or arachnids, can no longer pass through the building opening, but air exchange can still take place. The protective structure 72 comprises a frame 12. The protective structure 72 includes a protective element 74. The protective element 74 is designed as an example of a grid 66. Instead of the grid 66, a textile or a net could also be provided. The grid 66 is clamped in the frame 12. The grid 66 completely fills the frame 12. The frame 12 is arranged around the grid 66. The frame 12 has a rectangular shape. The frame 12 includes fastening elements (e.g., magnets, adhesive strips, retaining springs, etc.).(not shown) for attachment to the building opening. The frame 12 comprises four frame sides 38. Each of the frame sides 38 includes, for example, two mutually telescoping profile strips 10, 20. Alternatively, each of the frame sides 38 could have only one profile strip 10, 20 or more than two profile strips 10, 20 that are connected to each other and may be designed to be at least partially telescoping to each other. The profile strips 10, 20 are each made of metal. The profile strips 10, 20 are extruded profiles or at least made of extruded profiles. The profile strips 10, 20 can have at least substantially constant cross-sectional shapes over their entire longitudinal extent (in particular, apart from any subsequently introduced holes or recesses). The frame 12 is formed by several frame devices 62. The frame devices 62 are insect screen frame devices.The frame devices 62 each include a corner connector 16. The frame devices 62 each include two with profile strip interfaces 14, 24 (see . Fig. 2) of the corner connector 16 profile strips 10, 20, fixed in position. The one in the Fig. The frame 12 shown in Figure 1 is formed from four of these frame devices 62. The frame 12 therefore comprises a total of four corner connectors 16 and at least four profile strips 10, 20, each of which is fixedly connected to at least one of the corner connectors 16. In the illustrated case, there are eight profile strips 10, 20, each connected in pairs at a corner to one of the four corner connectors 16.

[0036] The Fig. 2 and Fig. Figure 3 shows perspective views of one of the corner connectors 16. Apart from an elastic element 30, the corner connectors 16 are formed by one-piece / monolithic plastic parts, e.g., injection-molded parts. Fig. Figure 2 shows a reverse side 98 of the corner connector 16 and the Fig. 3. A visible side 100 of the corner connector 16. The corner connector 16 is designed to connect the two adjacent profile strips 10, 20 of the frame 12. The corner connector 16 forms a first profile strip interface 14. The first profile strip interface 14 is designed to connect a first profile strip 10 of the two profile strips 10, 20 connected to each other by the corner connector 16 to the corner connector 16 in a positionally fixed manner. The corner connector 16 forms a second profile strip interface 24. The second profile strip interface 24 is designed to connect a second profile strip 20 of the two profile strips 10, 20 connected to each other by the corner connector 16 to the corner connector 16 in a positionally fixed manner. The connection created by the two profile strip interfaces 14, 24 results in a perpendicularly angled, fixed position of the two profile strips 10, 20 relative to each other. The corner connector 16 comprises a central area 18.The central section 18 forms a base body of the corner connector 16. The corner connector 16 forms two end sections 86, 88 that are angled perpendicular to each other. The first profile strip interface 14 includes a first extension 22 projecting from the central section 18 towards the first end section 86. The second profile strip interface 24 forms a second extension 26 projecting from the central section 18 of the corner connector 16 towards the second end section 88. The extensions 22, 26 are plug-in extensions. The extensions 22, 26 are designed to be inserted, at least to a large extent, into a receptacle 28 (see figure 1) when mounted to the associated profile strip 10, 20. Fig. 1) or to be recessed into a cavity of the associated profile strip 10, 20. The extension 22 of the first profile strip interface 14 has a larger cross-sectional area than the extension 26 of the second profile strip interface 24. The extensions 22, 26 each have cross-sectional outer contours that correspond to cross-sectional inner contours of the respective recesses 28 of the associated profile strips 10, 20.

[0037] The second profile strip interface 24 is structurally different from the first profile strip interface 14 in addition to its angled orientation. The second profile strip interface 24 has a functionally different connection mechanism than the first profile strip interface 14 (press fit vs. no press fit). The first profile strip interface 14 is designed to form a fit connection with the first profile strip 10, different from a press fit. The first profile strip interface 14 is designed such that the first profile strip 10 can be connected to the corner connector 16 without the use of a tool. The first profile strip 10 can be connected to the corner connector 16 by manually sliding it onto the first profile strip interface 14 in a linear assembly direction 36.The first profile strip interface 14 is designed such that the first profile strip 10 can be connected to the corner connector 16 in a positionally fixed manner without the use of a screw element, rivet, or bolt. Alternatively, the first profile strip 10 can be glued to the first profile strip interface 14 in its mounting position. The second profile strip interface 24, on the other hand, is designed as an interference fit with the second profile strip 20. The first profile strip interface 14 also has an integrated guide channel 68 for a tension element 70 intended for clamping the grid 66 into the frame 12 (in the . Fig. (2 indicated). The second profile strip interface 24, however, is free of such an integrated guide channel for the tension element 70. The central area 18 of the corner connector 16 has a connecting channel 94, which continues the guide channel 68 of the first profile strip interface 14 and deflects it towards the second profile strip interface 24. The central area 18 of the corner connector 16 has a receiving rail 96 for a spline or a brush strip. The receiving rail 96 forms a 90° bend. The connecting channel 94 and / or the receiving rail 96 are arranged on the rear side 98 of the corner connector 16. The visible side 100 of the corner connector 16 is free of functional elements for guiding or receiving further components of the frame 12.

[0038] The first profile strip interface 14 has the elastic element 30. The elastic element 30 is a spring element. The elastic element 30 is designed as a metal spring by way of example. The elastic element 30 is designed as a leaf spring by way of example. The elastic element 30 forms a spring tongue. Fig. Figure 4 shows a schematic, isolated perspective view of the elastic element 30. The elastic element 30 is intended for creating and / or securing the fit connection of the first profile strip interface 14, which differs from an interference fit. The elastic element 30 is intended for creating the positional fixation. The elastic element 30 is intended to exert a permanent compressive force on at least one inner surface of the first profile strip 10 when the first profile strip interface 14 is mounted to the first profile strip 10.The elastic element 30 is designed such that a principal direction of action 34 of the compressive force exerted by the elastic element 30 is oriented perpendicular to a mounting direction 36 defined by the first profile strip interface 14 for mounting the first profile strip 10 to the corner connector 16 and / or perpendicular to a longitudinal extension of the frame side 38 of the frame 12, which is to be formed by this first profile strip 10. The elastic element 30 is further designed such that the principal direction of action 34 is oriented perpendicular to a principal plane of extension of the corner connector 16, in particular of the frame 12 formed, among other things, by the corner connector 16. The elastic element 30 is arranged entirely within a region of the first profile strip interface 14, which is intended to be covered and encompassed by the profile strip 10 when the corner connector 16 is mounted to the first profile strip 10.

[0039] The elastic element 30 is positively connected to the corner connector 16. The elastic element 30 is positively connected to the first profile strip interface 14 of the corner connector 16. The corner connector 16 has a first fastening recess 50 in the area of ​​the first profile strip interface 14. The corner connector 16 has a second fastening recess 52 in the area of ​​the first profile strip interface 14. The elastic element 30 has an elongated central section 40. The central section 40 of the elastic element 30 has a (slightly outwardly) curved profile. The central section 40 of the elastic element 30 is designed to contact the inner surface of the first profile strip 10 when the frame 12 is assembled and to exert a compressive force on this surface generated by the elastic element 30.The elastic element 30 has a first angled end section 46 at a first longitudinal end 42. The first angled end section 46 engages in the first fastening recess 50 of the first profile strip interface 14 of the corner connector 16. The first angled end section 46 is bent approximately in a C-shape. The first angled end section 46 engages a projection of the first profile strip interface 14 of the corner connector 16 in an approximately semicircular shape. The elastic element 30 has a second angled end section 48 at a second longitudinal end 44. The second angled end section 48 engages in the second fastening recess 52 of the first profile strip interface 14 of the corner connector 16. The second angled end section 48 is bent approximately in an L-shape.The second angled end section 48 projects approximately perpendicularly to a frame plane enclosed by the frame 12 into the second fastening recess 52 of the first profile strip interface 14 of the corner connector 16.

[0040] The Fig. Figure 5 shows a schematic flowchart of a procedure for assembling the frame 12. In at least one assembly step 90, the corner connectors 16 and the profile strips 10, 20 are provided. The first profile strip 10 is provided separately. The second profile strip 20 is provided either already connected to the corner connector 16 or also separately. The second profile strip 20 is already connected to the second profile strip interface 24 of the corner connector 16 via the pre-assembled press fit, thus fixing its position. In at least one further assembly step 82, the first profile strip 10 is connected to the first profile strip interface 14 of the corner connector 16 by creating a fitting connection that differs from a press fit.If the second profile strip 20 was provided separately, then in a further assembly step 84 the second profile strip 20 is connected to the second profile strip interface 24 of the corner connector 16 by creating an interference fit. In at least one further assembly step 32, several frame devices 62 produced in this way are connected to each other to form the surrounding frame 12. In at least one further assembly step 92, the grid 66 or a net / textile is clamped into the frame 12.

[0041] The Fig. Figure 6 schematically shows a kit 76 for manufacturing the frame 12 and / or the protective structure 72. The kit 76 comprises four corner connectors 16. The kit 76 comprises four first profile strips 10. The kit 76 comprises four second profile strips 20. The first profile strips 10 are provided separately from the corner connectors 16 in the kit 76. The second profile strips 20 are provided in the kit 76 in the form of a pre-assembled unit 78, each with one of the corner connectors 16 pre-assembled. In the pre-assembled units 78, the corner connectors 16 are fixed in position via the second profile strip interfaces 24 of the corner connector 16. The kit 76 has a common packaging unit 80. The common packaging unit 80 is, by way of example, designed as a box, in particular a cardboard outer packaging.All eight profile strips 10, 20 and all four corner connectors 16 required for the complete assembly of the frame 12 and / or the protective structure 72 are arranged / packaged in the common packaging unit 80. Kits 76 with fewer than eight (e.g., four or six) or more than eight (e.g., ten) profile strips 10, 20 and four corner connectors 16 are also possible.

[0042] In the Fig. 7 and Fig. Figure 8 shows two further embodiments of the invention. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby, with regard to identically designated components, in particular components with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments, in particular the Fig. Reference can be made to sections 1 to 6. To distinguish between the embodiments, the reference numerals of the embodiment in the Fig. Numbers 1 to 6 have no letter appended. In the exemplary embodiments of the Fig. 7 and Fig. In contrast, in section 8 the letters a and b are used as suffixes to characterize the exemplary embodiments.

[0043] The Fig. Figure 7 shows a schematic sectional view through a part of an alternative frame device 62a with an alternative corner connector 16a and an alternative first profile strip 10a. The alternative corner connector 16a has a first profile strip interface 14a. The first profile strip interface 14a is designed to create a fit connection with the alternative first profile strip 10a, other than an interference fit. The first profile strip interface 14a has a locking element 54a. The locking element 54a is designed as an example locking hook. However, alternative embodiments of locking elements known to those skilled in the art are also conceivable. The alternative first profile strip 10a has a corresponding locking element 56a.The corresponding locking element 56a is designed as an opening in a profile wall of the alternative first profile strip 10a. The locking element 54a is intended to engage with the corresponding locking element 56a of the alternative first profile strip 10a in a state of the alternative corner connector 16a mounted to the alternative first profile strip 10a.

[0044] The Fig.Figure 8 shows a schematic sectional view through part of another alternative frame device 62b with another alternative corner connector 16b and another alternative first profile strip 10b. The further alternative corner connector 16b has a first profile strip interface 14b. The first profile strip interface 14b is designed to create a fit connection with the alternative first profile strip 10b, other than an interference fit. The first profile strip interface 14b has a magnetic element 58b. The magnetic element 58b is shown as a permanent magnet. Alternatively, the magnetic element 58b could also be a magnetizable element, e.g., ferromagnetic, such as an iron plate. The further alternative first profile strip 10b has a corresponding magnetic element 60b.The corresponding magnetic element 60b is designed as a magnetizable plate inserted into the further alternative first profile strip 10b. The magnetic element 58b is designed to engage in an attractive magnetic interaction with the corresponding magnetic element 60b of the further alternative first profile strip 10b when mounted on the alternative first profile strip 10b. Reference sign 10 Profile strip 12 frames 14 Profile strip interface 16 corner connectors 18 Central Area 20 profile strip 22 Continuation 24 Profile strip interface 26 continuation 28 recording 30 Elastic element 32 Assembly step 34 Main direction of action 36 Mounting direction 38 frame page 40 Middle section 42 Longitudinal end 44 Longitudinal end 46 Final section 48 Final section 50 Mounting recess 52 Mounting recess 54 Latching element 56 Corresponding latching element 58 magnetic element 60 Corresponding magnetic element 62 Frame device 66 grids 68 Guide channel 70 Pull element 72 Protective structure 74 Protective element 76 kit 78 Pre-assembled building units 80 Common packaging unit 82 Assembly step 84 Assembly step 86 End range 88 End range 90 Assembly step 92 Assembly step 94 Connection channel 96 Mounting rail 98 reverse 100 visible side

Claims

[1] Corner connector (16) for connecting two profile strips (10, 20) of a frame (12), in particular an insect screen frame, comprising a first profile strip interface (14) for the positionally fixed connection of a first profile strip (10) of the two profile strips (10, 20) with the corner connector (16), and a second profile strip interface (24) for the positionally fixed connection of a second profile strip (20) of the two profile strips (10, 20) with the corner connector (16) at an angle relative to the first profile strip (10), characterized by , that at least the first profile strip interface (14) is formed into a fitting connection with the first profile strip (10) that is different from an interference fit. [2] Corner connector (16) according to claim 1, characterized by , that the second profile strip interface (24) is designed in a structurally different manner from the first profile strip interface (14) in addition to its angled orientation. [3] Corner connector (16) according to claim 1 or 2, characterized by , that the second profile strip interface (24) has a functionally different connection mechanism than the first profile strip interface (14). [4] Corner connector (16) according to any one of the preceding claims, characterized by , that the second profile strip interface (24) is designed to form a press fit connection with the second profile strip (20). [5] Corner connector (16) according to any one of the preceding claims, characterized by, that at least the first profile strip interface (14), and preferably also the second profile strip interface (24) comprises a projection (22, 26) extending from a central area (18) of the corner connector (16), in particular a plug-in projection, which is provided to be recessed at least to a large extent into a receptacle (28) or a cavity of the associated profile strip (10, 20) in a state mounted to the associated profile strip (10, 20). [6] Corner connector (16) according to any one of the preceding claims, characterized by , that the first profile strip interface (14) is designed such that the first profile strip (10) can be connected to the corner connector (16) in a positionally fixed manner without the use of a tool. [7] Corner connector (16) according to any one of the preceding claims, characterized by, that the first profile strip interface (14) is designed such that the first profile strip (10) can be connected to the corner connector (16) in a positionally fixed manner without the use of a screw element, without the use of a rivet and without the use of a bolt. [8] Corner connector (16) according to any one of the preceding claims, characterized by , that the first profile strip interface (14) is designed such that the first profile strip (10) can be connected to the corner connector (16) in a positionally fixed manner without material joining. [9] Corner connector (16) according to any one of the preceding claims, characterized by, that the first profile strip interface (14), in particular for producing and / or securing the position fixation generated by the fitting connection different from a press fit, comprises an elastic element (30), preferably a spring element, which is provided to exert a permanent compressive force on at least one, in particular an inner, surface of the associated profile strip (10) in a state mounted on the associated profile strip (10). [10] Corner connector (16) according to claim 9, characterized by, that the elastic element (30) is designed such that a main direction of action (34) of the compressive force exerted by the elastic element (30) is oriented transversely, preferably perpendicularly, to a mounting direction (36) specified by the profile strip interface (14) for mounting the associated profile strip (10) to the corner connector (16) and / or to a longitudinal extension of a frame side (38) of the frame (12) which is to be formed by the associated profile strip (10). [11] Corner connector (16) according to claim 9 or 10, characterized by , that the elastic element (30) is designed such that a main direction of action (34) of the compressive force exerted by the elastic element (30) is oriented transversely, preferably perpendicularly, to a main extension plane of the corner connector (16), in particular of the frame (12) which can be formed, among other things, by the corner connector (16). [12] Corner connector (16) according to any one of claims 9 to 11, characterized by, that the elastic element (30) is a metal spring. [13] Corner connector (16) according to any one of claims 9 to 12, characterized by , that the elastic element (30) is a tongue spring or a leaf spring. [14] Corner connector (16) according to claim 12 or 13, characterized by , that the elastic element (30) is positively connected to the corner connector (16), in particular to the first profile strip interface (14). [15] Corner connector (16) according to one of claims 12 to 14, characterized by , that the elastic element (30) is completely arranged in an area of ​​the first profile strip interface (14) which is intended to be covered and / or encompassed by the profile strip (10) in a state of the corner connector (16) mounted to the associated profile strip (10). [16] Corner connector (16) according to one of claims 12 to 14, characterized by, that the elastic element (30) has an elongated central section (40) with a curved profile and at least one longitudinal end (42), preferably at both longitudinal ends (42, 44), an angled end section (46, 48), wherein the end section (46, 48) or the end sections (46, 48) are provided for engagement in fastening recesses (50, 52) formed by the profile strip interface (14). [17] Corner connector (16a) according to any one of the preceding claims, characterized by , that the first profile strip interface (14a), in particular for the production and / or securing of the position fixation generated by the fitting connection different from a press fit, comprises a locking element (54a) which is provided to engage in a locking connection with at least one corresponding locking element (56a) of the associated profile strip (10a) in a state mounted on the associated profile strip (10a). [18] Corner connector (16b) according to any one of the preceding claims, characterized by , that the first profile strip interface (14b), in particular for the production and / or securing of the position fixation generated by the fitting connection different from a press fit, comprises a magnetic element (58b) which is provided to enter into an attractive magnetic interaction with at least one corresponding magnetic element (60b) of the associated profile strip (10b) or with a material of the associated profile strip (10b) in a state mounted on the associated profile strip (10b). [19] Corner connector (16) according to any one of the preceding claims, characterized by, that the first profile strip interface (14) has an integrated guide channel (68) for a tension element (70) intended for clamping a textile or a grid (66) into the frame (12), while the second profile strip interface (24) is designed without an integrated guide channel for the tension element (70). [20] Frame device (62), in particular insect screen frame device, comprising at least one corner connector (16) according to one of the preceding claims and at least two profile strips (10, 20) fixed in position to the profile strip interfaces (14, 24) of the corner connector (16). [21] Frame (12), preferably insect screen frame, comprising four corner connectors (16) according to one of claims 1 to 19 and at least four profile strips (10, 20) which are each connected to at least one of the corner connectors (16) in a positionally fixed manner. [22] Protective structure (72), in particular insect protection, comprising a frame (12) according to claim 21 and a protective element (74) clamped in the frame (12), which is designed as a net, grid (66) or textile. [23] Kit (76) for manufacturing a frame device (62) according to claim 20, preferably a frame (12) according to claim 21 and / or a protective structure (72) according to claim 22, comprising: at least the corner connector (16) with the first profile strip interface (14) and with the second profile strip interface (24), at least the first profile strip (10), and at least the second profile strip (20), characterized by, that the first profile strip (10) is provided separately from the corner connector (16), and that the corner connector (16) and the second profile strip (20) are provided as a pre-assembled assembly unit (78), wherein in the pre-assembled assembly unit (78) the corner connector (16) is fixed in position to the corner connector (16) via the second profile strip interface (24) of the corner connector (16). [24] Kit (76) according to claim 23, characterized by a common packaging unit (80), e.g. box or bag, which packs at least all profile strips (10, 20) and all corner connectors (16) required to fully manufacture the frame (12) and / or the protective structure (72).

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