Foldable door hinge and functional entity with foldable door
By introducing a drive spring into the foldable door hinge, the problems of complex design, large space occupation and difficult installation in the prior art are solved, and the efficient application of rotational force and automatic folding functions in a small space are realized.
Patent Information
- Application Number
- CN202380049771.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-07-01
- Filing Date
- 2023-06-01
- Publication Date
- 2025-03-04
AI Technical Summary
Existing foldable door hinges are complex in design, requiring a large number of installation parts, occupying space and difficult to install, especially in limited interior spaces in furniture.
A foldable door hinge equipped with a drive spring is designed, connected by two hinge levers and a hinge shaft, the drive spring consists of two spring groups, interconnected by a spring center piece, capable of exerting a large force in a small space and is easy to install and connect.
It realizes efficient application of rotational forces in a small space, simplifies the installation process, reduces maintenance requirements, and automatically folds the foldable doors, providing an aesthetic and functional privacy screen.
Smart Images
Figure CN119563064A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a foldable door hinge and a functional entity, in particular a piece of furniture or a room part, comprising a foldable door, in particular a foldable sliding door, which is provided with at least one foldable door hinge. Background Art
[0002] In order to close off openings in functional entities, such as room sections or furniture, foldable doors, possibly foldable sliding doors, are usually used, which, after the opening has been released, are preferably moved into a door compartment or a storage space in order not to appear intrusive.
[0003] For example, a functional entity with foldable sliding doors is known from US Pat. No. 8,336,972 B2.
[0004] US9284761B2 discloses a piece of furniture with a displacement device, by which a mounting profile connected to a foldable sliding door is displaceable within a door compartment. The foldable sliding door comprises two door elements, wherein a first door element is connected to the mounting profile at the rear by a mounting hinge and is connected at the front to the rear of a second door element by a foldable door hinge, the second door element being connected at the front to a guide carriage, the guide carriage being displaceable along a guide rail, the guide rail comprising two track sections vertically aligned with each other and connected to each other by a curved section, wherein the first track section extends into the door compartment and the second track section extends along the front of the furniture. The mounting profile is kept in vertical alignment by a supporting device and guide carriages displaceably supported in the guide rails are provided on the upper and lower sides.
[0005] To close the furniture, the foldable door is rolled out of the door compartment and unfolded. In the closed position, the door elements are aligned with each other in a plane. To open the furniture, the foldable door is folded again, whereby the door elements are driven into the open position, preferably aligned parallel to each other into the door compartment.
[0006] In the closed position, the foldable door must remain in a flat orientation so that the folding process does not start automatically. After opening the foldable door from the closed position, it would be ideal if the folding process were to proceed automatically.
[0007] DE202018100262U1 discloses a pressure-actuated holding device, which helps to keep a foldable door in a closed position and helps to fold the foldable door after the foldable door is released from the closed position. The device includes a first mating component connected to a first door element of the foldable door and a second mating component connected to a second door element of the foldable door. Between the first mating component and the coupling device arranged on the second mating component, there is a pop-up element movably connected to the first mating component and the coupling device. The adjustment of the first mating component relative to the coupling device is carried out via an accumulator, which is manually loaded by the user and acts on the pop-up element. The release device is connected to the second door leaf via a connecting cable. The release of the locking device is achieved by applying pressure to the planar aligned door element, which will push the door element further away from the planar alignment in the closing direction.
[0008] The device has a complex structure and requires a large number of device parts, of which a first group is to be connected to the first door element and a second group is to be connected to the second door element. Furthermore, device parts are provided which connect the two mating members and thereby the two door elements to one another and wherein the first device part is mechanically guided while the second device part is loosely held with a corresponding effort, which is generally not ideal. Furthermore, the door element of the foldable door is only held in the closed position by the holding device. Therefore, measures need to be taken to prevent accidental unlocking. Due to the use of two mating parts, it must also be ensured that they are connected to the first and second door elements at the correct distance from one another and in the correct mutual alignment and height. It should also be noted that the device takes up a large amount of space, which is disadvantageous considering the limited space within the furniture, in particular within the door compartment.
[0009] US3846868A discloses a spring-loaded foldable door hinge that allows a hinged door element to rotate to an open position or a closed position after passing a center position. The foldable door hinge is complex in design and requires a mating element to be mounted on the upper edge of the door element.
[0010] DE 31 04 275 A1 discloses a foldable door hinge provided with a drive spring, by means of which door elements which are hinged to one another can be automatically pivoted against one another. Disclosed is a foldable door hinge with hinge levers which are connected to one another via a helical spring or a leaf spring, for which a correspondingly large space is required. When opening and / or closing the foldable door hinge, the helical spring stretches, whereby an advantageous force curve cannot be achieved. In particular, a hinge equipped with a drive spring in this way generates the desired rotational force only within a very small rotational range.
[0011] If the coil spring exerts a large force, a correspondingly high spring constant is required. Coil springs with a high spring constant usually require more space, which is why foldable door hinges with larger dimensions are produced.
[0012] Furthermore, helical springs with a high spring constant are more difficult to assemble. If helical springs with a high spring constant are preassembled, the foldable door hinge can only be mounted with difficulty on the two door elements of the foldable door. On the other hand, the subsequent assembly of springs with a high spring constant at the installation site is almost impossible or only possible with suitable tools.
[0013] KR102137007B1 discloses a foldable door hinge with two drive springs, each of which is held in a cup and penetrated by a hinge shaft which comprises a reduced diameter in the region of the spring. This foldable door hinge requires more effort to manufacture. The effect of the two springs, each comprising only a few turns, is limited.
[0014] US721A is a foldable door hinge having a first and a second plate-shaped hinge lever and a drive spring comprising two spring groups which are connected to each other via a spring center piece and each spring group comprises a spring end piece on the sides facing away from each other. The spring end piece abuts the first hinge lever and the spring center piece abuts the second hinge lever. After assembling the hinge, it is already ready for use, which is why its assembly on the door element of a foldable door is difficult. Mounting the foldable door hinge is particularly difficult if particularly strong drive springs are used.
[0015] US721A discloses a foldable door hinge having a first and a second plate-shaped hinge lever and a drive spring, the drive spring comprising two spring assemblies, the two spring assemblies being connected to each other via a spring center piece and each spring assembly comprising a spring end piece on sides facing away from each other. The spring end piece abuts the first hinge lever and the spring center piece abuts the second hinge lever. After assembling the foldable door hinge, it is ready for use. As mentioned above, it is difficult to assemble a ready-to-use foldable door hinge on a door element of a foldable door. If a particularly strong drive spring is used, it is particularly difficult to assemble the foldable door hinge. Summary of the invention
[0016] Therefore, the present invention is based on the purpose of creating a kind of improved foldable door hinge, foldable door hinge is equipped with drive spring.In addition, will create the functional entity with foldable door that is equipped with at least one such foldable door hinge, in particular furniture.
[0017] The foldable door hinge of the invention should be easily mountable on a door element of a foldable door.
[0018] A foldable door hinge comprising two hinge levers connected to each other via a drive spring should take up very little space and thus require hardly any additional space compared to a conventional hinge. Therefore, the foldable door hinge should be visually unnoticeable and preferably integrated into the door system.
[0019] The drive spring should be able to exert a large force on the hinge lever despite requiring a small space. In particular, it should exert a large force in a high rotation range of the hinge lever.
[0020] The foldable door hinge equipped with a drive spring should be of simple design and its construction should preferably differ only slightly from a conventional hinge, which comprises two hinge levers connected to each other via a hinge axis. In particular, no or only very simple structural parts are required to accommodate the drive spring.
[0021] Folding door hinges should preferably operate without friction, so that no noise is generated and no signs of wear are shown even after prolonged operation. Maintenance requirements should be kept to a minimum.
[0022] The use of a drive spring does not interfere with the design freedom of the other parts of the hinge, so that a foldable door hinge equipped with a drive spring can still be designed as desired and is hardly restricted by structural features that may interfere with the implementation of other hinge parts.
[0023] The drive spring should be easy to install and connect to the hinge lever. In particular, a drive spring with a very high spring constant should be easily installable. The drive spring should be installable without the use of tools. In particular, the drive spring should be installable with minimal manual effort, preferably automatically.
[0024] By means of the foldable door hinge according to the invention or by means of several foldable door hinges according to the invention, a foldable door which is held in a closed position, for example by means of a holding device and which is released from the closed position by manual action, should preferably be able to be folded automatically and completely.
[0025] The door gap between the door elements of a foldable door connected to each other by a foldable door hinge should preferably be covered with a frame which aligns correctly after the door elements are folded and prevents manual interference between the door elements, and also realizes a privacy screen which gives the partially or fully folded foldable door an aesthetically favorable appearance.
[0026] This object is solved by a foldable door hinge according to claim 1 and a functional entity, which may be a piece of furniture or a room part, having a foldable door, which is equipped with at least one such foldable door hinge according to claim 12. Advantageous embodiments of the invention are defined in the further claims.
[0027] Folding door hinges include:
[0028] - a first hinged lever comprising a first lever end piece having at least one bearing opening and a second lever end piece connected or connectable to the first mounting portion;
[0029] - a second hinged lever, comprising a first lever end piece having at least one bearing opening and a second lever end piece connected or connectable to the second mounting portion;
[0030] a hinge shaft which is held in a bearing opening of the hinge lever and which pivotably connects the two hinge levers to one another; and
[0031] A drive spring which abuts the first hinge lever on the one hand and the second hinge lever on the other hand.
[0032] The first lever end piece of the first hinge lever includes two spaced-apart first and second inner support arms, the first inner support arm and the second inner support arm having associated support openings, the first end piece of the second support arm being held between the associated support openings.
[0033] The first lever end piece of the first hinge lever also includes two first and second outer support arms spaced apart from the inner support arm.
[0034] The drive spring comprises two spring groups which surround the hinge axis and are interconnected by a spring center piece which abuts the second hinge lever.
[0035] A first spring group disposed between the first inner support arm and the first outer support arm includes a first spring end piece at an end remote from the spring center piece, the first spring end piece abutting the first outer support arm.
[0036] The second spring group disposed between the second inner support arm and the second outer support arm includes a second spring end piece at an end remote from the spring center piece, the second spring end piece abutting the second outer support arm.
[0037] According to the present invention,
[0038] - the first hinge lever comprises a retaining element for each spring end piece, in which retaining element the associated spring end piece engages or can engage, or
[0039] - the second hinge lever comprises a retaining member in which the spring centre piece engages or can engage, or
[0040] The first hinge lever comprises a retaining element for each spring end piece, in which retaining element the associated spring end piece engages or can engage, and the second hinge lever comprises a retaining member, in which retaining member the spring center piece engages or can engage.
[0041] Therefore, the foldable door hinge of the present invention equipped with the driving spring can be easily installed on the door element of a foldable door or a foldable sliding door.
[0042] Preferably, the drive spring is activated and engages with the spring end piece in the retaining element and / or the spring center piece in the retaining member only after the foldable door hinge has been mounted on the door element of the foldable door or foldable sliding door.
[0043] Preferably, it is set as,
[0044] - the retaining element is designed as a blocking element, into which the spring end piece can engage, or
[0045] - the retaining member is designed as a latching element into which the spring center piece can engage, or
[0046] The retaining element is designed as a latching element into which the spring end piece can engage, and the retaining component is designed as a latching element into which the spring center piece can engage.
[0047] By designing the holding element and / or the holding member as a latching element, the spring end piece can advantageously be connected to the holding element and / or the spring center piece can advantageously be connected to the holding member. Activation of the drive spring in a preferred embodiment described below can also advantageously be performed by actuating the foldable door.
[0048] According to the invention, a strong drive spring with two spring groups can thus be advantageously integrated into a foldable door hinge without causing difficulties during assembly. The two spring groups can exert a large force on the hinge lever so that the foldable door folds automatically after being released from the closed position.
[0049] The spring set of the drive spring preferably comprises helical or linear windings which are in contact with one another or are at least partially spaced apart from one winding to another, such that the spring set can be axially compressed.
[0050] Due to the helical embodiment of the drive spring, it can exert a high spring force on the hinge lever over a large rotation range of approximately 180°. If desired, the drive spring can also be provided with a pretension.
[0051] The helical embodiment of the drive spring allows a practically coaxial alignment of the spring assembly relative to the hinge axis and thus relative to the axis of rotation of the foldable door hinge. As a result, only very little space has to be taken up. Even if the coils of the spring assembly are provided with a larger diameter, the result is still a very slender structure of the foldable door hinge.
[0052] The compressibility of the spring assembly facilitates their coupling to the first hinge lever. By compressing the spring assembly, the spring end pieces are displaced axially and can be more easily guided by a tool or during operation of the foldable door hinge over the retaining elements provided on the first and second outer support arms. Jamming can thus be avoided.
[0053] In a preferred embodiment of the foldable door hinge, the drive spring coupled to the second hinge lever can be easily coupled to the first hinge lever by rotating the second hinge lever relative to the first hinge lever. Therefore, no tool is required for coupling the drive spring to the hinge lever.
[0054] Preferably, the first and second outer support arms each comprise a retaining element comprising a bevel or inclined flank, which preferably faces the second hinge lever and through which the associated first or second spring end piece can be inserted into a retaining channel behind the retaining element, in which the associated first or second spring end piece is retained after the foldable door hinge is put into operation.
[0055] Thus, the drive spring can be easily coupled to the first hinge lever by turning the second hinge lever against the first hinge lever with the drive spring. The spring end pieces at the height of the retaining element encounter the inclined surfaces of the retaining element and are guided along them over the retaining element until they can fall into the retaining channel behind the retaining element. This process can be easily performed by mounting the hinge on the door element and then folding the door element until the spring end pieces are guided over the retaining element and engage in the corresponding retaining channel.
[0056] When the second hinge lever rotates away from the first hinge lever and the drive spring is tensioned, the spring center piece is preferably held on the second hinge lever by a retaining element. For example, the retaining element is hook-shaped or nose-shaped so that the spring center piece is reliably held.
[0057] In a preferred embodiment, the spring center piece is held on the second hinge lever between the retaining element and the lock catch, and the lock catch holds the spring center piece when the second hinge lever is rotated against the first hinge lever and the spring end piece is coupled to the retaining element. Thus, a resting groove is formed between the retaining element and the lock catch, in which the spring center piece is always firmly held regardless of the rotation direction of the second hinge lever.
[0058] The hinge shaft is preferably held frictionlessly in the bearing opening of the hinge lever by a support element made of plastic, for example a slidable thermoplastic such as POM. By avoiding contact between the metal hinge shaft and the metal hinge lever, unnecessary friction, wear and tear as well as noise are avoided. The support element preferably fulfills a further function. In order to secure the hinge shaft against axial displacement, it is preferably held pressed against one of the hinge arms. However, axial displacement of the hinge shaft can also be prevented by at least one retaining ring.
[0059] Preferably, one support roller is each held by a hinge shaft inside the spring group of the drive spring, the outer diameter of the support roller being smaller than the inner diameter of the spring group. The support roller preferably comprises an axial hole, the inner diameter of which corresponds approximately to the outer diameter of the hinge shaft. The support roller is thus rotatably held by the hinge shaft with little play and can follow the movement of the spring group and keep them axially aligned. If the support rollers are held firmly, they still keep the spring group correctly aligned due to their sliding ability. As a result, the spring group is always aligned in an optimal way and cannot be deformed or stuck. The movement of the spring group is frictionless or substantially frictionless and does not generate noise and / or wear.
[0060] The support openings of the first and second outer support arms preferably comprise an inner diameter which allows one support roller each to be pushed through and into the corresponding spring group. In this way, the foldable door hinge can be easily assembled.
[0061] Preferably, the bearing openings of the first and second outer bearing arms comprise an inner diameter which allows one of the bearing rollers to be pushed through and into the associated spring group and further into the bearing opening portion of the adjacent first or second inner bearing arm. In this embodiment, the bearing rollers hold and form support elements for the hinge shaft on both sides. Thus, the hinge shaft can hold the bearing rollers, or the bearing rollers can optimally hold the hinge shaft and the spring group.
[0062] In a preferred embodiment, the hinge axis extends beyond the first hinge lever on one side or both sides so that an end piece of the hinge axis or two end pieces of the hinge axis can be easily connected to the frame device. If frame device is not provided, the extension of the hinge axis beyond the hinge lever is preferably omitted.
[0063] The frame arrangement preferably comprises a frame profile having two profile side pieces connected to each other by a profile center piece. At least one retaining module is positively, slidably and lockably retained in the frame profile, the retaining module comprising a connecting element fixedly or releasably connected to the hinge axis. The connecting element is preferably a retaining clip which can be placed on a corresponding end piece of the hinge axis and snapped into place. Thus, after assembling the foldable door, the frame profile can be easily installed by connecting the retaining module to the foldable door hinge.
[0064] The hinge arms of the foldable door hinge are preferably designed such that in the closed position of the door elements the frame device remains behind the foldable door and after folding the door elements the frame device remains on the front side between the door elements. The door elements can be guided against each other on the front side without leaving a disturbing door gap. On the other hand, after opening the foldable door, it is ensured that the door gap is covered by the frame profile, so that an aesthetically favorable visual protection is achieved and the door gap cannot be interfered with manually.
[0065] Preferably, the first lever end piece of the first hinge lever is provided with at least one first stop element, and the first lever end piece of the second hinge lever is provided with at least one second stop element. The first and second stop elements are arranged on the first and second hinge levers so that they are aligned in opposite directions after the two hinge levers are rotated and form a stop surface for the frame profile. After the foldable door is opened by the foldable door hinge or the stop element, the frame profile is therefore always kept in the desired orientation that correctly covers the door gap.
[0066] The functional entity of the invention, for example a piece of furniture or a room part such as a wardrobe, is provided with at least one foldable door having two door elements which are connected to each other by an inventive foldable door hinge or several inventive foldable door hinges.
[0067] The foldable door hinge preferably holds a frame arrangement with a frame profile, by which the door gap between the door elements is closed when the door elements are folded against each other.
[0068] Preferably, the foldable door can be locked in the closed position and released from the closed position by a holding device. After releasing, the foldable door can be automatically transferred to the folded state by one or more foldable door hinges.
[0069] In a preferred embodiment of the functional entity, the first door element is connected at an edge remote from the foldable door hinge by a mounting hinge to a mounting profile which is displaceable within the door compartment of the functional entity.
[0070] It is further preferred that the second door element is connected at an edge remote from the foldable door hinge to a guide carriage which is guided in a guide rail extending along the front side of the functional entity. BRIEF DESCRIPTION OF THE DRAWINGS
[0071] The present invention will be explained in more detail below with reference to the accompanying drawings. It is shown that:
[0072] Figure 1A functional entity 1 according to the invention in the form of an embodiment of a piece of furniture 1 having a foldable door 11 with two door elements 111 , 112 connected to one another by a foldable door hinge 3 according to the invention or several foldable door hinges 3 according to the invention and foldably insertable into a first door compartment 10 and having a door 11 ′ with only one door element 111 which is insertable into a second door compartment 10;
[0073] Figure 2 Figure 1 a rear side of a foldable door 11 of a piece of furniture 1, which has a first door element 111, which is connected at the rear edge to a mounting profile 12 by means of a mounting hinge 13 and at the front edge to a second door element 112 by means of one or more foldable door hinges 3 according to the invention, and on which a retaining device 2 is mounted in the preferred embodiment, which retaining device comprises a retaining magnet 28, which in the closed position of the foldable door 11 cooperates with a magnetic or ferromagnetic locking element 20, which is held fixed by a part of the furniture 1;
[0074] Figure 3 Figure 2 a portion of a foldable door 11 shortly before reaching the closed position or shortly after being released from the closed position, having a foldable door hinge 3, which comprises two hinge levers 31, 32, which are connected on the one hand to the associated door elements 111; 112 via a mounting portion 39 and on the other hand to each other via a hinge axis 33 and cooperate with parts of a drive spring 34, from which opposing torques are exerted on the hinge levers 31, 32;
[0075] Figure 4 Figure 3 A foldable door 11 in which the first door element 111 is in cross-section and the second door element 112 is aligned parallel thereto, wherein the foldable door 11 can be inserted into a door compartment 10 and wherein the hinge levers 31, 32 of the foldable door hinge 3 are rotated against each other and the drive spring 34 is fully or partially de-energized;
[0076] Figure 5a Figure 2 The foldable door hinge 3 is connected with two mounting parts in the embodiment of a hinge basin 39, wherein the drive spring 34 comprises two helical spring groups 341, 342, which surround the hinge axis 33 and abut the first hinge lever 31 with spring end pieces 3411, 3421 and are interconnected by a spring center piece 343 engaged in the retaining member 324 of the second hinge lever 32;
[0077] Figure 5b Figure 5a An exploded view of a foldable door hinge 3 without a hinge cup 39;
[0078] Figure 6a In the preferred embodiment Figure 2 The foldable door hinge 3 has Figure 5b The drive spring 34, the spring center piece 343 of the drive spring is engaged in the retaining member 324 of the second hinge lever 32, but the spring end pieces 3411, 3421 of the drive spring are not yet connected to the first hinge lever 31, and it has the frame device 4 retained by the hinge shaft 33;
[0079] Figure 6b In the preferred embodiment Figure 6a A foldable door hinge 3 having a drive spring 34, the spring end pieces 3411, 3421 of which are coupled to the first hinge lever 31, but the spring center piece 343 of which is not yet engaged in the retaining member 324 of the second hinge lever 32;
[0080] Figure 7a Drive spring 34 Figure 6a A foldable door hinge 3 in which the spring end pieces 3411, 3421 are coupled to the first hinge lever 31, wherein the second hinge lever 32 is rotated against the first hinge lever 31, or the first and second hinge levers 31, 32 are rotated against each other;
[0081] Figure 7b After completing the process of connecting the spring end pieces 3411, 3421 to the first hinge lever 31, Figure 7a Foldable door hinge 3;
[0082] Figure 7c Figure 7b A foldable door hinge 3, wherein a drive spring 34 is coupled to the first and second hinge levers 31, 32 and is partially tensioned after the second hinge lever 32 rotates counterclockwise;
[0083] Figure 8a Figure 7a A cross-sectional view of the foldable door hinge 3 along the line AA, wherein the first spring end piece 3411 of the drive spring 34 is guided over the inclined surface 3141 of the retaining element 314 on the first lever end piece 311 of the first hinge lever 31 during the clockwise rotation of the second hinge lever 32 until it engages in the retaining channel 3140 behind the retaining element 314;
[0084] Figure 8b With retaining element 314 Figure 8aa first lever end piece 311 of a first hinged lever 31, the retaining element comprising an inclined flank or ramp 3141 and adjoining a retaining channel 3140, the retaining channel being delimited on one side by the retaining element 314 and on the other side by a preferably provided retaining cam 315, and in which a spring end piece 3411 is retained;
[0085] Fig. 9 Figure 6a or Figure 6b An exploded view of the foldable door hinge 3 and the frame device 4;
[0086] Fig.10 In the closed position of the foldable door 11 Figure 6a or Figure 6b Foldable door hinge 3 and frame device 4;
[0087] Fig.11 Fig.10 A foldable door hinge 3 and a frame arrangement 4, wherein the door elements 111, 112 are folded against each other, between which the foldable door hinge 3 and the frame arrangement 4 are kept in precise alignment; and
[0088] Fig.12 Observed from above Fig.11 Foldable door hinge 3 and frame device 4. DETAILED DESCRIPTION
[0089] Figure 1 The functional entity 1 of the invention is shown in the form of an embodiment of a piece of furniture 1, which has a foldable door 11 that can be inserted into a first door compartment 10, and a one-piece door 11 ' that can be inserted into a second door compartment 10. The foldable door 11 and the one-piece door 11 ' are preferably each provided with a retaining device 2, by which they can be retained in the closed position. Any retaining device 2 can be used. It is particularly advantageous to use a retaining device 2 as described below.
[0090] The piece of furniture 1 preferably comprises a side wall 1A, an upper panel 1B, a lower panel 1C, an intermediate wall 1E and, on both sides, a partition wall 1D which delimits a door compartment 10 together with the side wall 1A.
[0091] The foldable door 11 comprises a first door element 111, which is connected on one side by a mounting hinge 13 to a mounting profile 12 and on the other side by a foldable door hinge 3 according to the invention to a second door element 112, the dimensions of which preferably correspond to the dimensions of the first door element 111. The foldable door 11 is slightly unfolded and can be completely folded and retracted into the door compartment 10, wherein the door elements 111, 112 are aligned parallel to each other, or completely unfolded and transferred to a closed position, in which the two door elements 111, 112 are at least approximately aligned in one plane. In order to hold the foldable door 11 in the closed position and to be able to release it from the closed position in a simple manner, one of the two door elements 111, 112, preferably the first door element 111, is provided with a retaining device 2, which in the closed position is opposite to a locking element 20. As indicated by the arrow, the retaining device 2 of the foldable door 11, which is provided with a magnetic element, is guided against the locking element 20 during the rotation of the first door element 111 and is magnetically retained in the closed position by the locking element 20.
[0092] exist Figure 1 In the embodiment shown, the doors 11, 11' are each connected via a mounting hinge 13 to a mounting profile 12, which is held in vertical alignment by a displacement device 9 and is displaceable in the associated door compartment 10. The door 11 is aligned parallel to the side wall 1A in front of the associated door compartment 10 and can subsequently be displaced into the door compartment 10. For displacement in the door compartment 10, the mounting profile 12 can also be provided with a drive device. Preferably, the mounting profile 12 is connected at the upper side to a support carriage 5A, which is displaceable into the door compartment 10 along an associated support rail 15A. On the lower side, the mounting profile 12 can also be connected to a carriage guided in the support rail.
[0093] In this preferred embodiment, the front edge of the second door element 112 of the foldable door 11 is connected to a guide carriage 5B, which is guided in a guide rail 15B, which extends along the front side of the furniture 1 and enters the door compartment 10 along a curve. Therefore, the foldable door 11 is held at the front side by the guide carriage 5B, which is displaceable along the front side of the furniture 1 in the unfolded state of the foldable door 11 and is displaceable into the door compartment 10 in the folded state of the foldable door 11. The guide carriage 5B always runs in front of the second door element 112 in the movement direction. By using the guide carriage 5B, the foldable door 11 can be opened and folded effortlessly.
[0094] Figure 2 Show Figure 1The rear side of a foldable door 11 of a piece of furniture 1 having a first door element 111, which is connected at the rear edge by means of a mounting hinge 13 to a mounting profile 12 and at the front edge by means of a foldable door hinge 3 according to the invention to a second door element 112, at the front side of which a guide carriage 5B is mounted. The guide carriage 5B comprises a support roller 51 which can roll on a support element 151 of the guide rail 15B, and a guide roller 52 which is guided in a guide channel 152 of the guide rail 15B. It is shown that the guide rail 15B extends along the front side of the piece of furniture 1 and passes around a curve into the door compartment 10 of the piece of furniture 1. In order for the guide carriage 5B to follow this curve, it is connected to the second door element 112 by means of parts 53, 54 of a drive body which are pivotally connected to each other.
[0095] The mounting profile 12 is connected at the upper end to a support carriage 5A which can be moved into the door compartment 10 along a support rail 15A. Figure 2 In the embodiment, the support carriage 5A is guided upwards to the stop device 7 located at the front of the door compartment 10. Figure 1 In this position, also shown in FIG. 1 , the foldable door 11 is fully extended from the door compartment 10 and can be unfolded to close the furniture opening 100 (see FIG. 1 ). Figure 1 ).exist Figure 2 In the embodiment, the foldable door 11 has almost reached the closed position and can be brought into the closed position by manually applying pressure on the foldable door 11 (preferably on the front edge 111), wherein the retaining device 2 mounted on the rear side of the partition element 111 can interact magnetically with the locking element 20 connected to the front side of the guide rail 15B.
[0096] The holding device 2 comprises a mounting part 21 which is preferably connected to the first door element 111 by screws and to a holding lever 22 by a lever shaft 23. At the front end piece or the holding lever 22 a holding magnet 28 and preferably one or more spacing rollers 29 are provided.
[0097] During closing, the spacing rollers 29 can roll on the locking element 20 and / or the guide rail 15B without the retaining lever 22 contacting the locking element 20 or the guide rail 15B. The retaining lever 22 is rotated and the retaining magnet 28 is aligned almost head-on against the locking element 20 so that it can be magnetically coupled to the magnetic or ferromagnetic locking element 20 in the closed position of the foldable door 11.
[0098] After release from the closed position, the two door elements 111, 112 are preferably folded automatically. The folding process is performed automatically or at least supported by the foldable door hinge 3 of the invention, which connects the two door elements 111, 112 to each other.
[0099] The foldable door hinge 3 comprises two hinge levers 31, 32, which are each connected to an associated door element 111, 112 at ends facing away from each other by means of mounting portions, preferably hinge cups 39, and which are connected to each other at lever end pieces facing each other by means of a hinge axis 33. In addition, a drive spring 34 is provided, which acts together with a spring end piece on the first hinge lever 31 and a spring center piece on the second hinge lever 32, as described below. Thus, the drive spring 34 acts on the two hinge levers 31, 32 and tries to turn them against each other and fold the door elements 111, 112.
[0100] Figure 2 Also shown is a spacing plate 200, which is inactive in the closed position of the foldable door 11. However, in the folded position of the foldable door 11 with the door elements 111, 112 aligned in parallel, the front piece of the retaining lever 22 with the spacing roller 29 abuts the spacing plate 200 and is pressed against the mounting portion 21 and is preferably aligned parallel thereto, so that when pushed into the door compartment 10, the front piece of the retaining lever 22 takes up as little space as possible (see Figure 4 ).
[0101] Figure 3 Show Figure 2 A portion of the foldable door 11 shortly before reaching the closed position or shortly after being released from the closed position. The door elements 111, 112 of the foldable door 11 are not yet aligned in one plane, and the holding magnet 28 is not yet in contact with the locking element 20. The holding lever 22 is tilted relative to the mounting portion 21 and faces the locking element 20 and will first contact it with the spacing roller 29. The spacing roller 29 (preferably made of plastic) hardly generates any noise.
[0102] The holding magnet 28 is recessed in the magnetic chamber and is therefore partially surrounded by a magnetic cup which protrudes from the front by, for example, 0.2 mm-2 mm, so that the holding magnet 28 cannot hit the locking element 20 .
[0103] The hand indicates that the holding device 2 can be locked in the closed position of the foldable door 11 by a first manual pressure and can be released again by a second manual pressure.
[0104] In order to lock the retaining device 2, the retaining device 2 includes a locking unit 24 having a force transmitter 241, which can be cyclically displaced in the locking unit 24 between a locking position and a release position by the action of pressure. In the locking position, the retaining device 2 reaches the retaining position, and in the release position, the retaining device 2 reaches the release position.
[0105] Schematically shown is a locking unit 24 with a force transmitter 241. The force transmitter 241, supported by a positioning spring 243, can be moved axially and actuates a switching mechanism 242, in which the blocking element is cyclically moved between a blocking position and a release position.
[0106] The foldable door hinge 3 comprises a drive spring 34 which is tensioned in this position of the foldable door 11 and attempts to fold the door elements 111, 112 against each other against the force of the user. Therefore, the holding device 2 must be magnetically coupled with the locking element 20 in the closed position and locked by the locking unit 24 so that the foldable door 11 remains in the closed position. Therefore, the drive spring 34 is loaded by the manual force and then serves to automatically fold the foldable door 11 once the foldable door is released from the closed position.
[0107] Figure 4 Show Figure 3 A foldable door 11, wherein the first door element 111 is a cross-sectional view and the second door element 112 is aligned parallel thereto, wherein the foldable door 11 can be inserted into the associated door compartment 10. The front part of the retaining lever 22 abuts against the spacer plate 200 using the spacer roller 229 and holds the retaining lever 22 at least approximately parallel to the mounting portion 21.
[0108] The hinge levers 31, 32 of the foldable door hinge 3, which are connected by the hinge shaft 33, have been turned against each other. The hinge spring 34 is thus fully or partially de-energized.
[0109] Figure 5a Show Figure 2 The foldable door hinge 3 includes a first hinge lever 31 and a second hinge lever 32 connected by a hinge shaft 33. In addition, the foldable door hinge 3 includes a drive spring 34 having two spring groups 341 and 342, which are connected to each other through a spring center piece 343 and have spring end pieces 3411 and 3421 arranged thereon. The drive spring 34 is tensioned at this position of the foldable door hinge 3 and surrounds the hinge shaft 33 with the spring groups 341 and 342. In addition, the drive spring 34 rests on the first hinge lever 31 through the spring end pieces 3411 and 3421, and rests on the second hinge lever 32 through the spring center piece 343.
[0110] The first hinge lever 31 comprises four support arms 3111, 3112, 3113, 3114 (see Figure 5b )'s first lever end piece 311 , the hinge axis 33 passes through two outer support arms 3111 , 3114 and two inner support arms 3112 , 3113 , and is connected to a second lever end piece 312 of an associated mounting element or hinge cup 39 .
[0111] The second hinge lever 32 comprises a first lever end piece 321 and a second lever end piece 322 , wherein the first lever end piece 321 is held between the two inner support arms 3112 , 3113 of the first hinge lever 31 and is penetrated by the support shaft 33 , and the second lever end piece 322 is connected to an associated mounting element or hinge cup 39 .
[0112] A retaining element 314 is provided on the outer support arms 3111, 3114, in which the spring end pieces 3411, 3421 of the spring groups 341, 342 are engaged and retained. The second support arm 32 comprises a retaining member 324, in which the spring center piece 343 is suspended and retained. The spring groups 341, 342 attempt to rotate the first hinge lever 31, which is retained by the spring end pieces 3411, 3421, in a clockwise direction around the hinge axis, and to rotate the second hinge lever 32, in which the spring center piece 343 is engaged, in a counterclockwise direction, the hinge axis defining the rotation axis x.
[0113] A preferably sleeve-shaped support roller 35 is held in each spring group 341, 342, which has an axial hole 350 through which the hinge shaft 33 passes. The movement of the spring group 341, 342 is therefore absorbed by the support roller 35, which is why the spring group 341, 342 always remains axially aligned and avoids undesired deformations of the spring group 341, 342 and friction of the spring group 341, 342, such as on the hinge shaft 33.
[0114] The diameter of the support roller 35 is preferably selected such that there is always a gap between the support roller 35 and the spring assemblies 341 , 342 , even if their inner diameters change during actuation of the foldable door hinge 3 .
[0115] The mounting element (e.g., hinge cup 39) can be connected to the associated lever end piece 312, 322 in a force fit and / or form fit manner. As shown, the mounting element 39 is preferably movable or adjustable relative to the lever end piece 312, 322 and can be fixed in a suitable position.
[0116] Figure 5b The preferred embodiment is shown in Figure 5a Exploded view of a foldable door hinge 3. The figure shows that in this embodiment, the inner support arms 3112 and 3113 include smaller support openings 31120, 31130, which can only accommodate the hinge shaft 33, but not the support rollers 35. The support rollers 35 each include an axial hole 350, in which the hinge shaft 33 is preferably rotatably held, but largely without play. On the other hand, the outer support arms 3111 and 3114 include larger support openings 31110, 31140, into which the support rollers 35 can be inserted. The first end piece 321 of the second hinge lever 32 is also provided with a support opening 3210, into which the hinge shaft 33 has been inserted.
[0117] Therefore, the foldable door hinge 3 can be easily assembled by inserting the first lever end piece 321 of the second hinge lever 32 between the two inner support arms 3112, 3113 of the first hinge lever 31, and inserting the spring groups 341, 342 of the drive spring 34 between the outer support arms 3111, 3112 and the inner support arms 3114, 3113, respectively. Then, the support roller 35 is inserted into the corresponding spring group 341 or 342 through the support holes 31110, 31140 of the outer support arms 3111, 3114. Finally, the hinge shaft 33 passes through the lever end pieces 311, 321, the support roller 35 and the spring groups 341, 342. Preferably, in one of these steps, the spring center piece 343 is engaged in the retaining element 324 of the second hinge lever 32. In addition, the spring end pieces 3411, 3421 are engaged in the retaining element 314 on the outer support arms 3111, 3114. Optionally, a mounting element 39 is connected to the hinge levers 31 , 32 .
[0118] As a result, the foldable door hinge 3 has Figure 5a The configuration shown, in which the spring end pieces 3411, 3421 engage in the retaining element 314 on the outer support arms 3111, 3114. Figure 5a In the embodiment, the retaining element 314 is in the shape of a cuboid, which is why the spring end pieces 3411, 3421 must be lifted onto the retaining element 314 with a tool. In the preferred embodiment of the foldable door hinge 3 described below, the process is greatly simplified by the preferred embodiment of the retaining element 314, so that the coupling process can actually be carried out automatically.
[0119] In all embodiments of the foldable door hinge 3, the drive spring 34 takes up hardly any space but nevertheless generates a very high spring force, so that the door elements 111, 112 can be powerfully pivoted from a closed position, in which they are aligned in one plane, preferably to a folded position, in which they are aligned parallel to one another. In the folded position, the force exerted by the drive spring 34 is reduced to a minimum. Furthermore, the movement of the door elements 111, 112 in this region is preferably damped by a damping element or damping device, so that no impact noises are generated.
[0120] The spring group 341, 342 supported by the support roller 35 remains coaxially aligned with the hinge axis 33 during this rotation and can be operated without friction. It is particularly advantageous that the spring group 341, 342 does not have to be arranged and held in the hinge housing, but can be arranged exposed, which forms a simple structure with minimal space requirements. As a result, the drive spring 34 is almost completely integrated into the foldable door hinge 3, resulting in an optimal solution in terms of appearance and function.
[0121] The drive spring 34 can follow the movement of the hinge arms 31, 32 without rubbing against the two spring groups 341, 342, which exert high forces on the hinge arms 31, 32. It is particularly advantageous that a powerful drive spring 34 can be integrated into the foldable door hinge 3 without taking up significantly more space.
[0122] Figure 6a Shown with Figure 5b In a preferred embodiment of the drive spring 34 Figure 2 In the foldable door hinge 3, the spring center piece 343 of the drive spring is engaged in the retaining member 324 of the second hinge lever 32, but the spring end pieces 3411, 3421 of the drive spring are not yet connected to the first hinge lever 31. In this configuration of the foldable door hinge 3, in which the drive spring 34 is not yet connected to the first hinge lever 31, the foldable door hinge 3 only includes a hinge function, but does not include a drive function. Therefore, in this state, the foldable door hinge 3 can be easily installed on the door elements 111, 112.
[0123] However, in order to engage the spring end pieces 3411, 3421 in the retaining element 314, no tools are required. Instead, the door elements 111, 112 are moved against each other with minimal force, which is indicated by the two arrows. When the first door element 111 and thereby the second hinge lever 32 rotate clockwise, the spring center piece 343 is entrained and the drive spring 34 rotates clockwise about the hinge axis 33. The spring end pieces 3411, 3421 guide against the retaining element 314, which is now no longer in the shape of a cuboid, but includes a chamfer or inclined flank 3141 on the side facing the spring end pieces 3411, 3421. In Figure 6a In the embodiment of the present invention, the spring end piece 3411 is still in front of the ramp 3141, which is stepless so that the spring end piece 3411 can slide on it during rotation. With further rotation of the drive spring 34, the spring end pieces 3411, 3421 are guided over the ramp or inclined flank 3141 until they have overcome the retaining element 314 and can each enter the retaining channel 3140, where they are firmly held.
[0124] Preferably, the coils of the spring groups 341 , 342 are spaced apart so that the spring groups 341 , 342 can be compressed during the coupling of the spring end pieces 3411 , 3421 and thereby the spring end pieces 3411 , 3421 can more easily pass through the inclined surface 3141 of the retaining element 314 .
[0125] In order to enable the second hinge lever 32 to carry the spring center piece 343 during the clockwise rotation, the hinge lever 32 is preferably provided with a lock 325 opposite to the retaining member 324. Thus, the spring center piece 343 is retained in the resting groove 328 between the retaining member 324 and the preferably provided lock 325 (see Fig. 9 ). During the clockwise rotation of the second hinge lever 32, wherein the spring end pieces 3411, 3421 are coupled to the first hinge lever, the spring center piece 343 contacts the catch 325, and during the subsequent counterclockwise rotation of the second hinge lever 32, wherein the drive spring 34 is tensioned, the spring center piece 343 contacts the retaining member 324.
[0126] Figure 6a Also shown is a frame device 4 with a frame profile 41, in which a retaining module 42 is retained in the frame profile in a form-fitting manner, but is axially displaceable and fixable. In order to fix the retaining module 42, they include a threaded hole 420, into which a bolt can be screwed to reach the frame profile 41 and fixed thereto. In order to be connected with the foldable door hinge 3, the retaining module 42 includes a connecting element preferably in the form of a retaining clip 423 embodiment, which can be coupled with a hinge shaft 33, which protrudes beyond the first hinge lever 31 on both sides, and is therefore drawn from the foldable door hinge 3 on both sides. Therefore, the frame device 4 can be easily coupled to the foldable door 11 or the foldable door hinge 3, so that when two door elements 111, 112 are folded against each other, the opening between them is covered or closed. On the one hand, this covers the door gap that is aesthetically disturbing. On the other hand, when the foldable door 11 is operated, it prevents the occurrence of manual intervention and injury in the door gap.
[0127] Figure 6a Also shown is an optional function of the two hinge levers 31, 32 to keep the frame device 4 or the frame profile 41 in the desired orientation within the open door gap between the first and second door elements 111, 112. To this end, the first lever end piece 311 of the first hinge lever 31 facing the hinge axis 33 includes a first stop element 316 on at least one of the outer lever arms 3111, 3114, and the first lever end piece 321 of the second hinge lever 32 facing the hinge axis 33 includes a second stop element 326. When the two hinge levers 31, 32 are rotated toward each other, the first stop element 316 of the first hinge lever 31 and the second stop element 326 of the second hinge lever 32 are each guided forward to one side of the frame profile 41, thereby automatically aligning parallel to the front side of the functional entity 1. This ensures that the frame device 4 or the frame profile 41 can actually perform its intended function and cover the door gap between the folded door elements 111, 112.
[0128] exist Figure 7a , 7b7c shows the process of connecting the spring end pieces 3411, 3421 to the first hinge lever 31, observing the first spring end piece 3411. The connection of the second spring end piece 3421 occurs simultaneously in the same way.
[0129] Figure 6b The preferred embodiment with the drive spring 34 is shown. Figure 6a In the foldable door hinge 3, the spring end pieces 3411, 3421 of the drive spring are coupled to the first hinge lever 31, but the spring center piece 343 of the drive spring is not yet engaged in the retaining member 324 of the second hinge lever 32. In this embodiment, the spring end pieces 3411, 3421 are therefore preferably already coupled to the retaining element 314 of the first hinge lever 31, while the second hinge lever 32 is not yet coupled to the drive spring 34 or the spring center piece 343 before the first operation of the foldable door hinge 3. Therefore, in this state, the foldable door hinge 3 can be conveniently mounted on the door elements 111, 112.
[0130] The retaining member 324 is preferably designed as a latching element so that when the hinge arms 31, 32 are rotated together, the spring center piece 343 can slide on the retaining member 324 and engage behind the retaining member 324. For example, the retaining member 324 is nose-shaped, hook-shaped or sawtooth-shaped.
[0131] In order to couple the drive spring 34 or the spring center piece 343 to the second hinge lever 32, the two hinge levers 31, 32 or the door elements 111, 112 are again turned against each other. In the process, the spring center piece 343 is guided on the retaining member 324 and, due to its elasticity, may bend slightly until it can engage behind the retaining member 324.
[0132] Preferably, the combination Figure 6a and Figure 6b An embodiment of the foldable door hinge 3 is such that when the two hinge levers 31, 32 are rotated toward each other for the first time, the spring end pieces 3411, 3421 can be automatically connected to the preferably bevel-shaped retaining element 314, and the spring center piece 343 of the drive spring 34 can be automatically connected to the retaining member 324.
[0133] exist Figure 7a In, with Figure 6a Compared to the position in the second hinge lever 32, the second hinge lever 32 has been slightly rotated clockwise. In this operation, as the lock 325 rotates the spring center piece 343 clockwise, the spring end pieces 3411, 3421 have been guided onto the inclined surface 3141 of the associated retaining element 314 and may have been slightly bent and / or lifted by the compression of the spring group 341.
[0134] exist Figure 7b, the spring end pieces 3411 , 3421 have overcome the inclined surface 3141 and are engaged behind the retaining element 314 .
[0135] exist Figure 7c In the process, the spring end pieces 3411, 3421 are held by the holding element 314, and the second hinge lever 32 is rotated back in the counterclockwise direction. In the process, the spring center piece 343 is driven counterclockwise by the holding member 324 of the second hinge lever 32, and the drive spring 34 is partially tensioned.
[0136] Figure 8a Shown along line AA through Figure 7a Cross-section of a foldable door hinge 3, in which the first spring end piece 3411 of the drive spring 34 is guided on the inclined surface 3141 of the retaining element 314 on the first lever end piece 311 of the first hinge lever 31 during the clockwise rotation of the second hinge lever 32 until it engages in the retaining channel 3140 behind the retaining element 314.
[0137] Figure 8b The embodiment of the invention is shown with a retaining element 314. Figure 8a The first lever end piece 311 of the first hinge lever 31 of the embodiment of the present invention comprises an inclined flank or ramp 3141 and adjoins a retaining channel 3140 which is delimited on one side by the retaining element 314 and on the other side by a preferably arranged retaining cam 315. The spring end piece 3411 is schematically shown to be firmly held in the retaining channel 3140 between the retaining element 314 and the preferably arranged retaining cam 315.
[0138] Fig. 9 Show Figure 6a The exploded view of the foldable door hinge 3 and the frame device 4. Figure 6a In Figure 5b Explain the basic elements of the foldable door hinge 3. Fig. 9 In the embodiment, the outer support arms 3111 , 3114 of the first lever end piece 311 of the first hinge lever 31 are provided with a preferably designed retaining element 314 which comprises an inclined surface.
[0139] The inner support arms 3112, 3113 preferably comprise support openings 31120, 31130 which have a first support opening section 31120A, 31130A directed inwards, the diameter of which corresponds to the diameter of the hinge axis 33, and a second support opening section 31120B, 31130B directed outwards, the diameter of which corresponds to the diameter of the support roller 35. In this preferred embodiment, the support roller 35 can therefore be rotatably held on both sides by the outer and inner support arms 3111, 3112 or 3114, 3113 and always aligned coaxially with the axis of rotation x. The support pin 36 can be held in the first support opening section 31120A, 31130A; 31120B, 31130B or in an intermediate transition section or receiving hole which is partially guided in the first support opening section 31120A, 31130A.
[0140] On the hinge axis 33 there are also bearing pins 36 facing each other, which can engage in bearing openings 3210 of the first lever end piece 321 of the second hinge lever.
[0141] The support roller 35 and / or the support pin 36 are preferably made of metal, such as high-quality steel, or of plastic, in particular a resistant and slidable plastic, such as a thermoplastic such as POM / polyoxymethylene, which ensures long-term optimal support of the hinge axis 33 and / or the spring groups 341, 342.
[0142] In order to prevent the hinge shaft 33 from moving axially by itself, preferably, the hinge shaft 33 is kept pressed inside one of the supporting arms 3111, 3112, 3113, 3114 of the first hinge lever 31 or inside the first lever end piece 321 of the second hinge lever 32. However, other means, such as a retaining ring, in particular a snap ring, can be provided to fix the hinge shaft 33. For example, a narrow groove is provided in the first lever end piece 321 of the second hinge lever 32, and a retaining ring 331 is inserted into the narrow groove, which retaining ring can engage the circumferential groove 330 in the hinge shaft 33 to preferably loosely retain the hinge shaft 33, but not axially displaceable. In this case, the hinge shaft 33 can be inserted into the two hinge levers 31, 32 and fixed only by one retaining ring 331.
[0143] Furthermore, the frame device 4 is shown with a frame profile 41, which comprises two profile side pieces 412, which are connected to each other via a profile center piece 411. The frame profile 41 comprises an approximately C-shaped cross section and an internal cross section which corresponds at least approximately to the cross section of the retaining module 42. As shown, the retaining modules 42 can be inserted into the frame profile 41 so that they are retained therein in a form-fitting manner but are axially displaceable and can be fixed by means of a threaded element 424, which can be a bolt screwed into a threaded hole 420.
[0144] The retaining module 42 comprises a module body 421 having a threaded hole 420 and an anchoring element 422 arranged on two sides extending parallel to each other. The anchoring element 422 can be engaged in a profile side piece 412 of the frame profile 41, which is preferably claw-shaped.
[0145] Fig.10 The foldable door 11 is shown in the closed position. Figure 6a or Figure 6b The foldable door hinge 3 and the frame device 4 are shown, wherein the door elements 111, 112 are placed face to face and close the door gap between them. The frame device 4 has been moved back behind the foldable door 11 by the hinge levers 31, 32 and is therefore no longer visible. Advantageously, only the foldable door 11 with the door elements 111, 112 aligned in planes in the closed position is presented to the observer of the functional entity or furniture 1. The functional entity 1 is thus reliably closed and access between the door elements 111, 112 is no longer possible.
[0146] If there is still a blocked door gap, the mounting screw 391 (by which the hinge levers 31, 32 are connected to the mounting element 39) can be loosened and the mounting element 39 can be moved relative to the hinge levers 31, 32 until the door gap reaches the desired size. The figure shows that the left hinge cup 39 can be engaged with a screwdriver to achieve the desired displacement. Subsequently, the mounting screw 391 is tightened again.
[0147] Fig.11 Show Fig.10 A foldable door hinge 3 and a frame device 4, wherein the door elements 111, 112 are folded against each other, between which the frame device 4 closing the gap is held by the foldable door hinge 3.
[0148] Fig.12 Shown from above Fig.11 Folding door hinge 3 and frame device 4. It can be seen that the stop elements 316, 326 hold the frame profile 41 in the desired position. It can also be seen that the inner cross section of the frame profile 41 corresponds at least approximately to the cross section of the inserted retaining module 42, which is connected to the hinge shaft 33 via a retaining clip 423. In addition, the spring center piece 343 of the drive spring 34 is shown to be held between the retaining member 324 and the lock catch 325 of the second hinge lever 32.
[0149] Reference numerals list:
[0150] 1- Functional entities, furniture, such as wardrobes;
[0151] 1A-side wall;
[0152] 1B-upper board;
[0153] 1C-lower plate;
[0154] 1D-dividing wall;
[0155] 10- First or second door compartment or storage space;
[0156] 100- the interior of functional entity 1;
[0157] 11- Folding door;
[0158] 111 - first door element;
[0159] 112 - second door element;
[0160] 11'-One-piece door
[0161] 12-Installation profile;
[0162] 13-Install the hinge;
[0163] 15A - support rail for supporting carriage 5A;
[0164] 15B - guide rail for guide carriage 5B;
[0165] 151- supporting element;
[0166] 152-Guide channel;
[0167] 2- Holding device;
[0168] 20 - Magnetic or ferromagnetic locking element;
[0169] 200-partition board;
[0170] 21- Installation part;
[0171] 22-Maintain leverage;
[0172] 23-lever shaft;
[0173] 24-locking unit;
[0174] 241-force transmitter;
[0175] 242-Switching mechanism;
[0176] 243-return spring;
[0177] 25-connection unit;
[0178] 28-Retaining magnet;
[0179] 29- spacing roller;
[0180] 3- Foldable door hinges;
[0181] 31-First hinge lever
[0182] 311 - first lever end piece of the first hinge lever 31
[0183] 3111-First support arm
[0184] 3110-First support opening
[0185] 3112-Second support arm
[0186] 31120-Second support opening
[0187] 31120A, 31120B- Second support opening part
[0188] 3113-Third support arm
[0189] 31310-Third support opening part
[0190] 31310A, 31310B- Third support opening
[0191] 3114-Fourth support arm
[0192] 31140-Fourth support opening
[0193] 312-second lever end piece of the first hinge lever 31
[0194] 314-Retaining element
[0195] 3140-Keep Channel
[0196] 3141-slope, inclined flank
[0197] 315-Holding Cam
[0198] 316-First stop element, stop lug
[0199] 32 - second hinge lever;
[0200] 321-first lever end piece of the second hinge lever 32
[0201] 3210 - Support opening in first lever end piece 321
[0202] 322-second lever end piece of the second hinge lever 32
[0203] 324-Retaining member
[0204] 325-Lock
[0205] 326 - Second stop element, stop lug
[0206] 328-Shelf slot
[0207] 33-Hinge axis
[0208] 330 - Circumferential groove in hinge shaft (optional)
[0209] 331 - Retaining ring, such as a snap ring (optional)
[0210] 34-Drive spring
[0211] 341-First spring group
[0212] 3411-First spring end piece
[0213] 342-Second spring group
[0214] 3421-Second spring end piece
[0215] 343-Spring center piece
[0216] 35-Support roller
[0217] 350-Axial hole
[0218] 36-Support pin
[0219] 39 - mounting part, hinge cup;
[0220] 4-Border device
[0221] 41-Frame profile
[0222] 410 - Internal cross section of frame profile 41
[0223] 411-profile center piece
[0224] 412-profile side parts
[0225] 42-Hold module
[0226] 420-threaded hole
[0227] 421-Module body
[0228] 422-Anchoring element
[0229] 423 - Connecting element, preferably retaining clip
[0230] 424-Threaded components, bolts
[0231] 5A-support slide;
[0232] 5B-guide carriage;
[0233] 51-support roller;
[0234] 52-guide roller;
[0235] 53-first carriage body portion;
[0236] 54-second carriage body portion;
[0237] 9- shifting device;
[0238] x - axis of rotation of the foldable door hinge.
Claims
1. Foldable door hinge (3) A first hinge lever (31) comprising a first lever end piece (311) having at least one bearing opening (31110, 31120, 31130, 31140), and a second lever end piece (312) connected or connectable to a first mounting portion (39); A second hinge lever (32) comprising a first lever end piece (321) having at least one bearing opening (3210) and a second lever end piece (322) connected or connectable to a second mounting portion (39); A hinge shaft (33) is held in a bearing opening (31110, 31120, 31130, 31140, 3210) of a hinge lever (31, 32) and pivotably connects the two hinge levers (31, 32) to each other; and A drive spring (34) is provided, which abuts the first hinge lever (31) on the one hand and the second hinge lever (32) on the other hand, wherein the first lever end piece (311) of the first hinge lever (31) comprises two first inner supporting arms and second inner supporting arms (3112, 3113) spaced apart from each other, the first inner supporting arms and the second inner supporting arms having associated supporting openings (31120, 31130), the first end piece (321) of the second supporting arm (32) being held between the supporting openings; and two first outer supporting arms and second outer supporting arms (3111, 3114) spaced apart from the inner supporting arms (3112, 3113), and, wherein the drive spring (34) comprises two spring groups (341, 342), the two spring groups surround the hinge axis (33) and are interconnected by a spring center piece (343), the spring center piece is adjacent to the second hinge lever (32), and wherein the first spring group (341) arranged between the first inner supporting arm (3112) and the first outer supporting arm (3111) comprises a first spring end piece (3411) at the end away from the spring center piece (343), the first spring end piece is adjacent to the first outer supporting arm (3111); and wherein the second spring group (342) arranged between the second inner supporting arm (3113) and the second outer supporting arm (3114) comprises a second spring end piece (3421) at the end away from the spring center piece (343), the second spring end piece is adjacent to the second outer supporting arm (3114), wherein, The first hinge lever (31) comprises a retaining element (314) for each of the spring end pieces (3411, 3421), the associated spring end piece (3411, 3421) engaging or being engageable in the retaining element, or The second hinge lever (32) comprises a retaining member (324) in which the spring center piece (343) engages or can engage, or The first hinge lever (31) comprises a retaining element (314) for each of the spring end pieces (3411, 3421), the associated spring end piece (3411, 3421) being engaged or capable of being engaged in the retaining element, and the second hinge lever (32) comprises a retaining member (324), the spring center piece (343) being engaged or capable of being engaged in the retaining member.
2. The foldable door hinge (3) according to claim 1, wherein: The retaining element (314) is designed as a locking element, into which the spring end pieces (3411, 3421) can engage, or The retaining member (324) is formed as a blocking element into which the spring center piece (343) can engage, or The retaining element (314) is formed as a latching element into which the spring end pieces (3411, 3421) can engage, and the retaining member (324) is formed as a latching element into which the spring center piece (343) can engage.
3. The foldable door hinge (3) according to claim 1 or 2, wherein: The spring center piece (343) is held or can be held on the second hinge lever (32) between the holding element (324) and the catch (325).
4. A foldable door hinge (3) according to claim 1, 2 or 3, wherein: A drive spring (34) is coupled to the first hinge lever (31) and is coupleable to the second hinge lever (31) by rotating the hinge levers (31, 32) against each other; or The drive spring (34) is coupled to the second hinge lever (32) and can be coupled to the first hinge lever (31) by rotating the hinge levers (31, 32) against each other; or The drive spring (34) can be coupled to the first hinge lever (31) on the one hand and to the second hinge lever (32) on the other hand by the rotation of the hinge levers (31, 32).
5. The foldable door hinge (3) according to claim 4, wherein: The first and second outer support arms (3111, 3114) each comprise one of the retaining elements (314), the retaining element comprising an inclined surface (3141), via which the associated first or second spring end piece (3411, 3421) can be introduced into a retaining channel (3140) located behind the retaining element (314), wherein the associated first or second spring end piece (3411, 3421) is retained in the retaining channel after the foldable door hinge (3) has been put into operation; or The first lever end piece (321) of the second hinge lever (32) comprises a retaining member (324) in the form of a locking element, on which the spring center piece (343) can be guided and locked behind the retaining member (324); or The first and second outer support arms (3111, 3114) each include one of the retaining elements (314), the retaining element including an inclined surface (3141), via which the associated first or second spring end piece (3411, 3421) can be introduced into a retaining channel (3140) located behind the retaining element (314), after the foldable door hinge (3) has been put into operation, the associated first or second spring end piece (3411, 3421) is retained in the retaining channel, and the first lever end piece (321) of the second hinge lever (32) includes a retaining member (324) in the form of a locking element, and the spring center piece (343) can be guided on the retaining member and locked behind the retaining member (324).
6. The foldable door hinge (3) according to any one of claims 1 to 5, wherein: In the spring group (341, 342) of the drive spring (34), the support roller (35) is held rotatably and substantially without play via the hinge shaft (33), wherein the outer diameter of the support roller (35) is smaller than the smallest inner diameter of the spring group (341, 342).
7. The foldable door hinge (3) according to claim 6, wherein: The support openings (31110, 31140) of the first and second outer support arms (3111, 3114) include an inner diameter that allows one of the support rollers (35) to pass through and into the associated spring assembly (341, 342), or The support openings (31110, 31140) of the first and second outer support arms (3111, 3114) include an inner diameter that allows one of the support rollers (35) to pass through and enter the associated spring group (341, 342), and further enter the support opening portion (31120B, 31130B) of the adjacent first or second inner support arm (3112, 3113).
8. The foldable door hinge (3) according to any one of claims 1 to 7, wherein: The spring group (341, 342) of the drive spring (34) includes helical or thread-like turns that abut against each other or are at least partially spaced apart from each other from one turn to another, so that the spring group (341, 342) can be axially compressed.
9. The foldable door hinge (3) according to any one of claims 1 to 8, wherein: The hinge shaft (33) has an end piece protruding beyond the first hinge lever (31) on one or both sides, and the end piece of the hinge shaft (33) is connected to the frame device (4).
10. The foldable door hinge (3) according to claim 9, wherein: The frame device (4) comprises a frame profile (41), the frame profile having two profile side pieces (412) interconnected by a profile center piece (411), at least one retaining module (42) being retained in the frame profile (41) in a shape-fitting, displaceable and fixable manner, the retaining module (42) comprising a connecting element (423) fixedly or detachably connected to a hinge shaft (33).
11. The foldable door hinge (3) according to claim 10, wherein: The first lever end piece (311) of the first hinge lever (31) is provided with at least one first stop element (316), and the first lever end piece (321) of the second hinge lever (32) is provided with at least one second stop element (326). The first and second stop elements (316, 326) are arranged on the first and second hinge levers (31, 32) so that they are aligned in opposite directions after the two hinge levers (31, 32) rotate, and form an abutment surface for a frame profile (41).
12. Functional entity (1), piece of furniture or room part, having a foldable door (11) with two door elements (111, 112), which are connected to each other by at least one foldable door hinge (3) according to any one of claims 1-11.
13. The functional entity (1) according to claim 12, wherein: A frame device (4) is held by the foldable door hinge (3), the frame device being arranged to cover a door gap between the door elements (111, 112).
14. The functional entity (1) according to claim 12 or 13, wherein: The foldable door (11) can be locked in a closed position by a retaining device (2) and can be released again from the closed position, wherein the foldable door (11) can be at least partially transferred to a folded state by the action of a force applied by one or more foldable door hinges (3).
15. Functional entity (1) according to claim 12, 13 or 14, wherein: The first door element (111) is connected to a mounting profile (12) via a mounting hinge (13) at an edge remote from the foldable door hinge (3), the mounting profile being displaceable within a door compartment (10) of the functional entity (1), and the second door element (112) is connected to a guide carriage (5B) at an edge remote from the foldable door hinge (3), the guide carriage being guided in a guide rail (5B) extending along the front side of the functional entity (1).
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