DE202020100939U1 - Hinged door hinge with locking function - Google Patents

Abstract

Hinged door hinge with integrated locking function with a first hinge part (1), a second hinge part (2) and a hinge arrangement (3) pivotably connecting the first hinge part (1) with the second hinge part (2), the hinge arrangement (3) at least one on the has the first hinge part (1) stationary and has a first hinge bracket (4) which can be pivoted about a first axis (a) and a second hinge bracket (5) which is connected to the first hinge bracket (4) so that it can pivot about a second axis and which is attached to the first hinge part (1 ) is rotatably held about a third axis (c) which is positively guided in a displacement range between a first extreme value and a second extreme value, characterized in that a tensioning device is arranged on the first band part (1), through which a displaceably positively guided first end ( 10) a connecting lever (11) is subjected to a force that the connecting lever (11) on a second End (12) is connected to the second hinge bracket (5) and that the direction of the force transmitted through the connecting lever (11) to the second hinge bracket (5) changes depending on the position of the third axis (c) in the displacement range.

Description

The invention relates to a folding door hinge with an integrated closing function with a first hinge part and a second hinge part and a hinge arrangement pivotally connecting the first hinge part to the second hinge part. The hinge arrangement has at least one first hinge bracket, which is held stationary on the first hinge part and can be pivoted about a first axis, and a second hinge bracket which is connected to the first hinge bracket and can be pivoted about a second axis. The second hinge bracket is held on the first hinge part so as to be pivotable about a third axis, which is displaceably guided in a displacement region. The range of displacement is limited by a first extreme value and a second extreme value, between which the third axis can be moved when the door hinge closes.

The generic door hinges are suitable for being installed between a door leaf and a door frame in such a way that they do not appear visibly when the door leaf is closed. This enables an aesthetically particularly appealing appearance to be achieved. Furthermore, when the door leaf is closed, there are no parts of the door hinge that could pose a risk of injury. Hinged door hinges are also safely protected against external damage when the door is closed. Concealed door hinges can be found particularly in the high-priced market segment.

An important convenience feature in connection with doors is an automatic closing function. This ensures that a door leaf is automatically moved into a closed position without further action by a user. For this purpose, external units are usually used, which are installed above a door opening and exert a closing force on the door leaf by means of a lever arm. With such an additional structure, however, the aesthetics which are to be achieved by a concealed door hinge are considerably disturbed.

On the other hand, systems in which a locking function is integrated in a folding door hinge have so far only achieved inadequate locking properties. For example, is out EP 0 352 912 A1 a convertible top hinge with integrated locking function and the above features known. The closing function is provided via a pull rod which is acted upon by a spring force and acts on the displaceably positively guided axis of rotation. The closing spring is increasingly relaxed during a closing movement, as a result of which the closing force becomes ever smaller. The lowest closing force is thus available, particularly in the area shortly before complete locking, in which the greatest closing force is required to overcome a snap lock. Another disadvantage is that the door must be secured against unintentional closing in the open state, since the closing force is present in the entire closing area without any difference. The closing behavior of the convertible top hinges known from the prior art is therefore still in need of improvement.

Against this background, the invention has for its object to provide a compact convertible top hinge with an improved locking function. This object and the object of the invention is achieved by a concealed door hinge according to claim 1 and a door arrangement according to claim 15. Preferred configurations are specified in the dependent subclaims.

According to the invention, a tensioning device is arranged on the first band part, by means of which a displaceably positively guided first end of a connecting lever is subjected to a force. The connecting lever is connected to the second hinge bracket at a second end. The direction of the force transmitted to the second hinge bracket by the connecting lever changes depending on the position of the third axis in the displacement region. The tensioning device is connected to the first end of the connecting lever in such a way that it directly or indirectly exerts an effective pushing or pulling force in the direction of the positive guidance. The connecting lever forms the coupling of a coupling gear, which transmits the positively guided movement of its first end to the second hinge lever, which is also connected to the second end and is likewise positively guided. The connecting lever and the positive guidance of its first end are designed (in particular dimensioned and aligned) such that the force transferred to the second hinge bracket and acting along the positive guidance of the third axis causes a reversal of direction when passing through the displacement area.

In a preferred embodiment, the force transmitted by the connecting lever to the second hinge bracket is effective in the direction of the first extreme value in a first functional position, in which the third axis is located in a first partial area of the displacement area adjoining the first extreme value. In a second functional position, in which the third axis is located in a second partial area of the displacement area adjoining the second extreme value, the force transmitted to the second hinge bracket is effective in the direction of the second extreme value. Thus, the required force can be provided by the same clamping device on the one hand to provide a closing function in a partial area adjoining the closed position and on the other hand to exert a force in the area near the maximum opening of the door hinge, by means of which a door leaf attached with it can be kept open. The first and the second partial area of the displacement area can directly adjoin one another and thereby adjoin one another in a functional position in which the force transmitted by the connecting lever to the second hinge bracket is perpendicular to the momentary forced guidance of the third axis, so that neither closing nor opening forces are transmitted . The coupling mechanism is expediently designed in such a way that an increase in force occurs near the extreme values, the force exerted on the second hinge bracket being greater than the input force exerted by the tensioning device on the first end of the connecting lever. This allows resistances to be overcome, for example during a closing movement, by means of a snap lock.

In a preferred embodiment, the first end of the connecting lever is positively guided along a circular arc path by a guide lever in the first band part. The connecting lever and the guide lever together form a toggle lever which is connected at the first end of the connecting lever by a knee joint. By a suitable choice of the position of the axis of rotation of the guide lever, its length and the length of the connecting lever, the force-free neutral position and the force amplification near the extreme positions can be adjusted as required. The positive guidance provided by the guide lever can be made robust and with little play. The toggle lever arrangement is expediently designed in such a way that near the closed position of the door leaf (in particular with a closing angle of less than 10 °) the connecting lever and the guide lever of the toggle lever arrangement form an extended angle of more than 160 ° on the knee joint, so that a particularly high closing force can be transferred to overcome a snap lock.

In a particularly preferred embodiment, the guide lever is held on the first band part so as to be pivotable about the first axis of rotation. This arrangement enables a compact design and direct power transmission of the toggle lever arrangement to the hinge arrangement. The first hinge bracket and the guide lever can expediently be rotatably fixed to the first hinge part with a common hinge pin. This also results in a particularly advantageous manner in direct force transmission between the locking mechanism and the hinge arrangement, without having to conduct forces indirectly via the first hinge part.

In an alternative embodiment, the first end of the connecting lever is displaceably positively guided in a link guide. This link guide is expediently linear and aligned obliquely to the forced guidance of the third axis. In a preferred embodiment, the included angle is at least 60 °, particularly preferably 90 °.

The connecting lever is preferably held on the second hinge lever so as to be pivotable about the third axis. As a result, the thrust lever arrangement can only transmit thrust moments along the positive guidance of the third axis to the second hinge lever. Torques about the third axis are decoupled from this and are not transmitted. The connecting lever can preferably be held on the second hinge bracket by the same hinge pin, which produces the pivotable and displaceable connection to the first hinge part. This enables a compact design and direct power transmission.

In a preferred embodiment, the third axis is held displaceably in the first band part on the basis of a, in particular rectilinear, first link guide. A slide guide offers an easy-to-manufacture and particularly versatile form of positive control. As a result, the installation space provided by the belt part can be optimally used. The control characteristic of the coupling gear can also be adjusted particularly well, since the closing movement of the door hinge corresponds to a displacement of the third axis along the link guide. The displacement range is formed by the part of the link guide that lies between the first extreme value and the second extreme value. The third axis c is at the first extreme position when the convertible top hinge is in an open position. The third axis is in a closed position of the convertible top hinge c in a second extreme position.

Particularly preferably, the two hinge brackets are mounted on the second hinge part in such a way that one of the two hinge brackets, relative to the second hinge bracket, is fixed and rotatable about a fourth axis and the other hinge bracket is pivotable about a fifth axis and can be moved along a positive guide - preferably a second link guide is. This provides a particularly robust and stable hinge arrangement with a total of five pivot axes.

In a further preferred embodiment, the third axis is on the first band part at least one pivot lever is pivotally held. The swivel lever creates an arcuate positive guide for the third axis with particularly simple means. In configurations with positive guides formed by swivel levers on both belt parts, a joint arrangement with a total of seven axes is provided.

Depending on the requirement, different positive guides can be combined on the first hinge part and on the second hinge part. The teaching according to the invention can also be transferred to multi-joint arrangements in which the first hinge bracket and / or the second hinge bracket are only indirectly coupled to the second band part via further hinge brackets.

The tensioning device is preferably designed with a deflection lever which acts on the connecting lever in the region of the first end. In particular, the deflection lever can be coupled to the connecting lever on the hinge pin adjoining the positive guidance of the first end. If the positive guidance of the first end is not provided above the deflection lever, the connection between the deflection lever and the connecting lever is preferably provided with a length compensation device, for example in the form of an elongated hole. This prevents mechanical overdetermination.

In a particularly preferred embodiment, the convertible top door hinge has a damping device which acts on the second hinge bracket. The damping device can expediently be arranged in or on the first band part. A closing or opening movement caused by the closing device or a user can be braked by a damping device in order to prevent the door leaf from closing or opening in an uncontrolled manner. A damping force exerted by the damping device and opposite to the closing movement is expediently dependent on the speed at which an opening or closing movement is carried out. Fast movements are strong and slow movements are slowed down slightly or not at all, so that a door leaf, regardless of its initial position and speed, is reproducibly closed by the interaction of the closing device and the damping device with approximately the same closing characteristic. By coordinating the closing and damping forces, a door leaf suspended on door hinges according to the invention can be set so that it closes quickly and reliably.

The damping device preferably acts on the second striker on the third axis. As a result, the movement of the connection point between the damping device and the second striker is determined exclusively by the positive guidance of the third axis. In addition, no torques about the third axis can be transmitted to the second hinge bracket by pushing or pulling forces of the damping device if the connection is designed to be rotatable.

The damping device expediently has a damping element which is coupled to the second hinge bracket via a connecting rod. Damping elements can be procured as purchased parts with defined damping characteristics. These usually have two connection areas which can be moved against one another with the intended damping characteristic. The connecting rod allows the first connection area to be mechanically coupled to the second hinge bracket. The damping element is held in or on the convertible top door hinge so that the other connection area can introduce tensile and / or compressive forces into the first hinge part, at least in certain closed positions. The connecting rod ensures a balance between the movement options of the damping element and the second hinge bracket.

The damping device expediently has a lost motion connection. As a result, the damping device can exert a damping force only at certain closing angles. In the remaining swivel range of the hinge, an opening and closing movement is undamped. In this way, the fact can be taken into account that damping is necessary in particular shortly before reaching an obstacle, for example when a door leaf is completely closed or opened. Outside of these ranges, damping can be perceived as rather annoying by the user.

The damping device expediently has a reset function, by means of which it is moved into a neutral position as soon as no external forces are present. This ensures that the damping element always produces the frictional connection at the same opening or closing angles during a closing or opening movement and provides a damping function.

In a particularly preferred embodiment, the damping device is effective both in a pushing direction and in a pulling direction. As a result, in addition to the uncontrolled slamming, an uncontrolled opening of the door leaf can also be prevented or at least slowed down. This allows the door hinge to be overloaded when pivoting against an opening-side Prevent a stop or a collision of the door leaf or a door handle attached to it with a wall or another obstacle.

In a preferred embodiment, the first band part has a housing in which the first axis, the positive guidance of the third axis, the tensioning device and the connecting lever are accommodated. The receptacle for a hinge pin forming the first axis and the positive guidance for the third axis can expediently be designed as formations in the inside of the housing. In a particularly preferred embodiment, the housing can be fixed on a door leaf or a door frame via two fastening tabs, on which the housing is held so as to be adjustable orthogonally to the front (in the lateral direction). Alternatively or additionally, an adjustment in the vertical direction (height direction) and / or the horizontal direction lying in the plane of the front side (pressing direction) can be provided on the second band part.

The invention also relates to a door with a door frame and a door leaf connected to the door frame by at least one concealed door hinge described above. The first hinge part of the convertible top hinge is arranged in an associated recess in the door leaf. All the components required to provide the closing and possibly the damping function are combined in the first band part. They can therefore be arranged together in a space-saving manner in the interior of the door leaf, which is difficult to use anyway. The second hinge part on the door frame side can accordingly be produced in a space-saving manner with customary dimensions — not enlarged compared to a door hinge without a locking function.

• 1 eine perspektivische Darstellung eines erfindungsgemäßen Türbandes in einer ersten Ausführungsform mit teilweise aufgebrochenem Gehäuse,
• 2 einen mittigen Horizontalschnitt durch das Türband aus 1 in einer angedeuteten Einbausituation,
• 3 eine perspektivische Darstellung entsprechend 1 aus einem anderen Betrachtungswinkel,
• 4 eine Darstellung entsprechend 1 und 3 aus einem weiteren Betrachtungswinkel,
• 5 eine perspektivische Darstellung eines erfindungsgemäßen Türbandes gemäß einer weiteren Ausführungsform mit teilweise aufgebrochenem Gehäuse,
• 6 einen Horizontalschnitt durch das Türband gemäß 5 in einer eingedeuteten Einbausituation,
• 7 eine perspektivische Darstellung entsprechend 5 aus einem anderen Betrachtungswinkel und
• 8 eine Darstellung entsprechend den 5 und 7 aus einem weiteren Betrachtungswinkel.

The invention is explained below on the basis of drawings showing exemplary embodiments only. They show schematically:

• 1 1 shows a perspective illustration of a door hinge according to the invention in a first embodiment with the housing partially broken open,
• 2nd a central horizontal section through the hinge 1 in an indicated installation situation,
• 3rd a perspective view accordingly 1 from a different angle,
• 4th a representation accordingly 1 and 3rd from a further angle,
• 5 2 shows a perspective illustration of a door hinge according to the invention in accordance with a further embodiment with a partially broken housing
• 6 a horizontal section through the hinge according to 5 in an indicated installation situation,
• 7 a perspective view accordingly 5 from a different angle and
• 8th a representation corresponding to the 5 and 7 from a further angle.

The 1 shows a convertible top hinge according to the invention with an integrated closing function according to a first embodiment. This has a first band part 1 , a second part of the band 2nd and a the first band part 1 with the second part of the band 2nd pivotable connecting hinge arrangement 3rd on. In the exemplary embodiment, the hinge arrangement has a first hinge bracket 4th and a second hinge bracket 5 on.

All directions in the figures relate to the usual information of the lateral direction x, the pressure direction y and the height direction z. The height direction z is parallel to the pivot axes of the hinge arrangement 3rd aligned. Both the pressing direction y perpendicular to an outer surface of a door leaf and the respective lateral direction x perpendicular to the height direction z and the pressing direction y are each fixed to the first hinge part 1 Are defined.

A comparison with 2nd you can see that the first hinge bracket 4th on the first part of the tape 1 stationary and around a first axis a is pivoted. The second hinge bracket 5 is with the first hinge bracket 4th around a second axis b pivotally connected. On the first part of the tape 1 is the second hinge bracket 5 about a third axis that is positively guided in a displacement range c held pivotable. The forced control of the third axis c is through a linear first backdrop 6 on the first part of the tape 1 provided.

Relative to the second band part 2nd is the second hinge bracket 5 around a fixed fourth axis d held rotatable. The first hinge bracket 4th is on the second band part along a linear second link guide 7 movable and about a fifth axis e pivoted.

In 2nd is also an installation situation with a door leaf 8th in which the first part of the tape 1 is inserted, and a door frame 9 which is the second band part 2nd takes up, indicated by dashed lines. The door hinge is in the 1 to 4th in a maximum open position in which the first band part 1 opposite the second part of the tape 2nd is pivoted through a maximum opening angle of 180 °. The third axis c is in a first extreme position of the displacement range.

According to the invention is on the first band part 1 a tensioning device is arranged through which a displaceably positively guided first end 10th a connecting lever 11 is subjected to a force. The link lever 11 is at a second end 12th on the second hinge bracket 5 connected. This is the forced management of the first end 10th the connecting lever 11 designed so that through the connecting lever 11 on the second hinge bracket 5 transmitted force depending on the position of the third axis c changes in the range of displacement.

In the in the 1 to 4th illustrated embodiment is the first end 10th the connecting lever 11 by the tensioning device with one in the direction of the first link guide 6 applied force. As a result, the connecting lever 11 in the first extreme position (opening position) shown, a force is exerted in the opening direction. As a result, the convertible top door hinge is opened up to an opening-side stop and held there. Proceeding from this, the door leaf must close 8th first be moved against this opening force to a position in which the force is applied by the connecting lever 11 perpendicular to the forced guidance of the first backdrop guide 6 stands. In this position, no opening or closing forces are transmitted to the hinge. After this point is exceeded, the force on the second hinge bracket is reversed 5 around so the third axis c experiences a force in the direction of a second extreme position (closed position) of the displacement region.

The forced guidance of the first end 10th the connecting lever 11 is via a guide lever 13 provided that around the first axis a together with the first hinge bracket 4th by a common hinge pin on the first hinge part 1 is held. This will be the first end 10th the connecting lever 11 on the first part of the tape 1 positively guided along a circular arc path. Connecting lever 11 and guide lever 13 form a toggle mechanism, which is through a knee joint 14 connected is.

The link lever 11 is at its second end 12th with the second hinge bracket 5 around the third axis c pivotally connected. This will use the connecting lever 11 only displacement forces along the first link guide 6 , but no torque on the second hinge bracket 5 transfer.

The functioning of the tensioning device is particularly evident from a comparative analysis of the 2nd and 3rd clear. The tensioning device has a bell crank 15 on that around a deflection axis f stationary and swiveling on the first band part 1 is held. Through a tie rod 16 is the bellcrank 15 with a clamping plate 17th connected by means of two tension springs 18th is loaded with a clamping force. The clamping plate 17th is on the first part of the tape 1 through guide bolts 19th guided linearly in the lateral direction x. The tension springs are in cylindrical recesses of the first band part 1 recorded and on their the clamping plate 17th opposite end by clamping screws 20th supported. By adjusting the clamping screws 20th the internal tension of the cylindrical recesses can be used to preload the tension springs 18th can be set.

Through the tie rod 16 is from the clamping plate 17th a tensile force effective in the lateral direction x on a first end of the bell crank 15 exercised. Due to the pivotability around the deflection axis f the bell crank sets 15 this into a thrust on the first end 10th the connecting lever 11 towards the first scenery tour 6 around. The coupling takes place via the knee joint 14 between connecting lever 11 and guide lever 13 forming hinge pin, which in an elongated hole at the second end of the bell crank 15 is led. The second end of the bellcrank 15 is fork-shaped and encompasses the knee joint 14 from connecting lever 11 and guide lever 13 in the height direction z top and bottom. The guide lever 13 is also fork-shaped and in turn encompasses the first end 10th the connecting lever 11 in the same way. This ensures maximum stability.

In the embodiment shown, the convertible top hinge additionally has a damping device. This is with two damping elements 21 formed in the associated cylinder bores of the first band part 1 are axially displaceable in the lateral direction x. The damping elements 21 each have a first connection area 22 and a second connection area 23 on that in the longitudinal direction of the damping element 21 (Lateral direction x) are movable relative to each other against a damping force. In the exemplary embodiment shown is the second connection area 23 formed as a stamp, which in a cladding tube of the damping element 21 can telescope in. The first connection area 22 is by means of a connecting rod 24th with the second hinge bracket 5 through the hinge pin of the third axis c connected.

The second connection area is in the open position of the hinge 23 free and does not absorb any damping forces. At a Closing movement becomes the damping element 21 initially without force in a lost motion in the direction of a stop element 25th shifted, which by means of adjusting screws 26 on the clamping plate 17th is attached. If the opening angle falls below (current angle between a surface of the door leaf 8th and the same surface in the closed position) of approximately 45 °, the second connection area comes 23 of the damping element 21 with the stop element 25th in contact. With a further closing movement, the first connection area 22 and the second connection area 23 moved towards each other, the damping element 21 exerts an opposite pushing or pushing force. This slows the closing movement of the hinge. By adjusting the distance between the stop element 25th and the clamping plate 17th using the set screws 26 the opening angle at which the damping effect occurs can be set. The upper limit of the damping range can expediently be set between an opening angle of 35 and 45 °. Here are the set screws 26 provided with a driving profile - in particular a hexagon socket - which can be achieved with associated tool bores with an adjusting tool. As a result, subsequent adjustment of the stop element is also possible with a door hinge according to the invention that has already been installed. When the door hinge is in the open position, the tool holes are directly accessible from the front of the door hinge in the lateral direction x. With a similar positioning tool, driving profiles can also be installed in the clamping screws 20th to adjust the preload of the tension springs 18th can be achieved.

The first part of the tape 1 is with a housing 27 formed which between an upper mounting bracket 28 and a lower mounting bracket 29 is held adjustable in the lateral direction x, the adjustment with a spindle drive 30th is realized. The upper mounting bracket is used for installation 28 and the bottom mounting tab 29 fixed with a door leaf 8th screwed. The housing 27 plunges into a recess in the door leaf provided for this purpose. In the exemplary embodiment, the housing carries all the facilities necessary for the function of the door hinge, the tensioning device and the damping device. This is especially the first stage tour 6 to accommodate the third axis c , the storage of the first axis a , the storage of the deflection axis f the guide bolts 19th as well as the guides of the tension springs 18th and the damping elements 21 in the housing 27 integrated. The housing 27 can in particular be made in one piece as a cast metal. The second part of the tape 2nd is in a conventional manner with a pressure adjustment 31 and a height adjustment 32 educated. This results in an overall three-dimensional adjustment of the door leaf 8th opposite a door frame 9 enables.

The 5 to 8th show an alternative embodiment of a door hinge according to the invention. The construction of the hinge function and the mechanical connection of the tensioning device are identical. Corresponding parts are provided with identical reference symbols. The two configurations differ only in the design of the tensioning device and the damping device.

In order to simplify the construction, the design variant was based on an adjustability of the preload of the tension springs 18th waived. These are in one of those of the end face of the first band part 1 Open blind hole on the opposite side. At the end of the blind bore oriented toward the end face, the blind bore is completely closed or, as in the exemplary embodiment, has a reduced diameter, so that the tension springs 18th are supported on this side on a support surface. The coupling between the tension springs 18th and the tie rod 16 takes place via two cylindrical end pieces 33 , which are guided axially in the blind bores and by means of a bolt to the bell crank 15 opposite end of the drawbar 16 are connected. The housing 27 has a corresponding recess, which an axial movement of the bolt 34 allows. On her the tension springs 18th facing end have the end pieces 33 each on mandrel elements, which in the soul of the tension springs designed as coil springs 18th penetration.

The stop element 25` For the damping function, the variant is independent of the tensioning device and directly by means of adjusting screws 26 ' on the housing 27 held axially adjustable. Furthermore, the second connection area 23 ' with a thin one, in the damping element 21 immersed rod formed on its the damping element 21 end facing a thickening 35 having. Just as in the first exemplary embodiment, the damping element can be moved during a closing movement by adjusting the stop element 25 ' adjustable opening angle a damping force opposite to the closing movement can be exerted. There are also train stops on the first part of the belt 36 provided by the rod of the second connection area 23 ' be penetrated. The thickening 35 points towards the passage of the train stop 36 an excess on. The thickening reaches an opening angle of approx. 90 ° 35 with the train stop 36 in contact. If the door leaf is opened further - in particular by the integrated tensioning device - there is damping under tensile loading of the damping element 21 instead of. As a result, the opening movement of the hold-open function is delayed or damped, so that the door leaf 8th or a doorknob mounted on it not with the door frame 9 surrounding wall area collides.

The damping elements expediently contain 21 Reset means, which the second connection area 23 ' Return to a medium basic position between maximum extension and maximum compression of the damping elements in a force-free state. This ensures that, regardless of a previous opening or closing movement, the range of a damped opening or closing movement always begins at the same (if necessary adjustable) limit angle.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 0352912 A1 [0004]

Claims (15)

Hinged door hinge with integrated locking function with a first hinge part (1), a second hinge part (2) and a hinge arrangement (3) pivotably connecting the first hinge part (1) with the second hinge part (2), the hinge arrangement (3) at least one on the has the first hinge part (1) stationary and has a first hinge bracket (4) which can be pivoted about a first axis (a) and a second hinge bracket (5) which is connected to the first hinge bracket (4) so that it can pivot about a second axis and which is attached to the first hinge part (1 ) is rotatably held about a third axis (c) which is positively guided in a displacement range between a first extreme value and a second extreme value, characterized in that s a tensioning device is arranged on the first band part (1) by means of which a displaceably positively guided first end ( 10) a connecting lever (11) is subjected to a force that the connecting lever (11) on a second End (12) is connected to the second hinge bracket (5) and that the direction of the force transmitted by the connecting lever (11) to the second hinge bracket (5) changes depending on the position of the third axis (c) in the displacement range. Concealed door hinge after Claim 1 , characterized in that the force transmitted by the connecting lever (11) to the second hinge bracket (5) in a first functional position, in which the third axis (c) is located in a first portion of the displacement area adjoining the first extreme value, in the direction of the first extreme value is effective and that the force transmitted by the connecting lever (11) to the second hinge bracket (5) is in a second functional position, in which the third axis (c) is located in a second partial area of the displacement area adjoining the second extreme value, is effective in the direction of the second extreme value. Concealed door hinge after Claim 1 or 2nd , characterized in that the first end (10) of the connecting lever (11) is positively guided on a circular arc path by a guide lever (13). Concealed door hinge after Claim 3 , characterized in that the guide lever (13) on the first band part (1) is held pivotable about the first axis (a). Concealed door hinge after Claim 1 or 2nd , characterized in that the first end (10) of the connecting lever (11) is positively guided by a link guide on the first band part (1). Hinged door hinge according to one of the Claims 1 to 5 , characterized in that the connecting lever (11) is held at its second end (12) about the third axis (c) on the second hinge lever (5). Hinged door hinge according to one of the Claims 1 to 6 , characterized in that the third axis (c) in the first band part (1) is slidably held along a first link guide (6). Hinged door hinge according to one of the Claims 1 to 6 , characterized in that the third axis (c) on the first band part (1) is pivotally held by means of a pivot lever. Hinged door hinge according to one of the Claims 1 to 8th , characterized in that the tensioning device is designed with a deflection lever (15) which acts on the connecting lever (12) in the region of the first end (10). Hinged door hinge according to one of the Claims 1 to 9 , characterized by a damping device which acts on the second hinge bracket (5). Concealed door hinge after Claim 10 , characterized in that the damping device acts on the second hinge bracket (5) on the third axis (c). Concealed door hinge after Claim 10 or 11 , characterized in that the damping device has a damping element (21) which is coupled to the second hinge bracket (5) via a connecting rod (24). Hinged door hinge according to one of the Claims 10 to 12th , characterized in that the damping device has a lost motion connection. Hinged door hinge according to one of the Claims 10 to 13 , characterized in that the damping device is effective both in a pushing direction and in a pulling direction. Door with a door frame (9) and one by at least one folding door hinge according to one of the Claims 1 to 14 connected door leaf (8), the first hinge part (1) being received in an associated recess in the door leaf (8).

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