Mechanical locking system for panels

Abstract

The invention relates to a set of panels comprising a first panel (1) having a first main plane, a second panel (2) having a second main plane and a mechanical locking device configured for locking the first panel (1) to the second panel (2). The first panel (1) comprises a first edge (11) and a first panel surface (12), the second panel (2) comprises a second edge (21) and a second panel surface (22). In a locked position of the first and second panel, the first main plane is arranged substantially perpendicular to the second main plane. The mechanical locking device comprises a first tongue (3) and a groove surface (5) at the first panel surface (12), and a locking groove (4) and an edge surface (6) at the second edge (21). The first tongue (3) comprises a first locking surface (31), the locking groove (4) comprises a second locking surface (41), the first locking surface (31) is configured to interact with the second locking surface (41) in the locked position, wherein the first tongue (3) and / or the locking groove (4) is flexible to facilitate locking the first panel to the second panel. A longitudinal axis (34) of the first tongue (3) extends from the first main plane with a first angle (a), the groove surface (5) extends from the first main plane with a second angle (b), the second locking surface (41) extends from the second main plane with a third angle (g), the edge surface (6) extends from the second main plane with a fourth angle (d), and the first angle (a) ≥ the second angle (b) and / or the third angle (g) ≤ the fourth angle (d).

Description

TECHNICAL FIELD

[0001] Embodiments of the present invention relate to panels configured to be locked together with a mechanical locking device. These panels can be panels that can be assembled and locked together to obtain a furniture product, for example a bookcase, a cupboard, a wardrobe, a chest, a drawer or a furniture component, and that can be disassembled afterwards. The mechanical locking device can comprise a flexible tongue. BACKGROUND

[0002] As evidenced by WO2012 / 154113 or WO2015 / 105449, furniture products provided with a mechanical locking device are known in the art. The described furniture products comprise a first panel connected perpendicularly to a second panel by a mechanical locking device comprising a flexible tongue in a slot.

[0003] The above description of various known aspects is the applicant's characterization of those aspects and is not an admission that any of the above descriptions is considered prior art.

[0004] Embodiments of the present invention address the need to provide panels that can be assembled and disassembled, which can be easily manufactured. SUMMARY

[0005] It is an object of certain aspects of the present invention to provide an improvement over the above-described techniques and known techniques. It is a particular object to improve the ease of manufacture of panels, for example building panels or furniture panels, that are locked together by a mechanical locking device. These panels can be part of an assembled product, for example a furniture product, for example a furniture component, a drawer, a cupboard, a bookcase, a wardrobe, a kitchen appliance or a chest.

[0006] It is a further object of at least certain aspects of the present invention to facilitate the assembly and disassembly of panels that are configured to be assembled with a locking device that is easy to manufacture.

[0007] It is a further object of at least certain aspects of the present invention to facilitate the assembly of panels that are configured to be assembled with a locking device that is easy to use and install and that reduces the risk of incorrect installation of the panels.

[0008] It is a further object of at least certain aspects of the present invention to facilitate the assembly of panels in a more stable and aesthetically pleasing manner.

[0009] At least some of these and other objects and advantages which will be apparent as the description proceeds have been achieved by a set of panels, comprising a first panel having a first main plane, a second panel having a second main plane, and a mechanical locking device configured for locking the first panel to the second panel, wherein the first panel comprises a first edge and a first panel surface, the second panel comprises a second edge and a second panel surface, and in a locked position of the first panel and the second panel, the first main plane is arranged substantially perpendicular to the second main plane, wherein the mechanical locking device comprises a first tongue and a groove surface at the first panel surface, and a locking groove and an edge surface at the second edge, the first tongue comprising a first locking surface, the locking groove comprising a second locking surface, the first locking surface being configured to interact with the second locking surface in the locked position, wherein the first tongue and / or the locking groove are flexible to facilitate locking the first panel to the second panel, a longitudinal axis of the first tongue extending from the first main plane at a first angle, the groove surface extending from the first main plane at a second angle, the second locking surface extending from the second main plane at a third angle, the edge surface extending from the second main plane at a fourth angle, and wherein the first angle > the second angle and / or the third angle < the fourth angle.

[0010] According to an aspect, the first angle is in the range of about 25° to about 45°, or in the range of about 35° to about 40°. These angle ranges facilitate the manufacturing of the locking device.

[0011] According to an aspect, the second angle is in the range of about 25° to about 45°, or in the range of about 35° to about 40°. These angle ranges facilitate the manufacturing of the locking device.

[0012] According to an aspect, the third angle is in the range of about 65° to about 45°, or in the range of about 55° to about 50°. These angle ranges facilitate the manufacturing of the locking device.

[0013] According to an aspect, the fourth angle is in the range of about 65° to about 45°, or in the range of about 55° to about 50°. These angle ranges facilitate the manufacturing of the locking device.

[0014] According to an aspect, the first tongue is a flexible tongue.

[0015] According to an aspect, the first tongue is positioned in a first slot.

[0016] According to an aspect, the flexible tongue can have a longitudinal shape, and the first slot can have a longitudinal shape, wherein the flexible tongue is positioned in the first slot with its length direction parallel to the length direction of the first slot.

[0017] According to an aspect, the mechanical locking device further comprises at least one rod-shaped element at the first panel surface and / or the second edge, and at least one second slot at the opposite first panel surface and / or the opposite second edge, and wherein the rod-shaped element is configured to be inserted into the second slot in the locked position.

[0018] According to an aspect, the first slot can comprise a wall surface, an opposite wall surface, and a bottom surface extending between the wall surface and the opposite wall surface.

[0019] According to an aspect, the first slot can comprise an opening opposite the bottom surface.

[0020] According to an aspect, the flexible tongue can be configured to be compressed and / or displaced towards the bottom surface during locking of the first panel to the second panel, and to spring back towards the second locking surface when the first panel and the second panel have reached the locked position.

[0021] According to an aspect, the centre line can extend between the wall surface and the opposite wall surface. The centre line can extend from the first main plane at a centre line angle.

[0022] According to an aspect, the centre line angle can be substantially the same as the first angle a.

[0023] According to an aspect, the rod-shaped element is arranged in a rod-shaped element recess.

[0024] According to an aspect, the rod-shaped element recess is a drilled hole.

[0025] According to an aspect, the slot is a drilled hole.

[0026] According to an aspect, the drilled hole is a bottom-ended drilled hole.

[0027] According to an aspect, the recess surface, the edge surface, and / or the second locking surface is a milled surface.

[0028] According to an aspect, the difference between the first angle and the second angle is between 0° and 10°.

[0029] According to an aspect, the difference between the third angle and the fourth angle is between 0° and 10°.

[0030] According to an aspect, the second edge of the second panel comprises a second tongue, and wherein the second tongue comprises a flexible groove.

[0031] According to another aspect, there is also provided a method of providing a first panel and / or a second panel with a mechanical locking device configured for locking the first panel to the second panel, wherein the first panel comprises a first edge and a first panel surface, and the second panel comprises a second edge and a second panel surface, wherein the method comprises: providing the first panel surface of the first panel with a groove surface and a slot of the locking device by milling using only a first milling tool in a single operation.

[0032] According to an aspect, the method is configured for manufacturing a set of panels according to the above.

[0033] According to another aspect, there is also provided a method of providing a first panel and / or a second panel with a mechanical locking device configured for locking the first panel to the second panel, wherein the first panel comprises a first edge and a first panel surface, and the second panel comprises a second edge and a second panel surface, wherein the method comprises: providing the second edge of the second panel with a second locking surface and an edge surface by milling using only a second milling tool in a single operation, and providing the second locking surface and the edge surface on opposite sides of the second tongue.

[0034] According to an aspect, the method comprises a method of providing a first panel and / or a second panel with a mechanical locking device configured for locking the first panel to the second panel, wherein the first panel comprises a first edge and a first panel surface, and the second panel comprises a second edge and a second panel surface, wherein the method comprises: providing the first panel surface of the first panel with a groove surface and a slot of the locking device by milling using only a first milling tool in a single operation, as described above.

[0035] According to an aspect, the method is configured for manufacturing a set of panels as described above.

[0036] According to an aspect, the core of the first panel and / or the second panel can be a wood-based core, which can be made of MDF, HDF, OSB, WPC, plywood or chipboard. The core can also be a plastic core, which comprises a thermoset plastic or a thermoplastic, such as vinyl plastic, PVC, PU or PET. The plastic core can comprise a filler.

[0037] The first panel and / or the second panel can also be of solid wood.

[0038] The first panel and / or the second panel can be provided with a decorative layer, such as a foil or a veneer, on one or more surfaces. BRIEF DESCRIPTION OF DRAWINGS

[0039] These and other aspects, features and advantages of which embodiments of the application are capable of will be apparent and elucidated by the description of embodiments of the present application with reference to the drawings. In the drawings:

[0040] Figures 1-6 A set of panels comprising a first and a second panel with locking means is shown according to an exemplary embodiment of the application. Figures 1-3 A first and a second panel before assembly are shown, while Figures 4-6 A first and a second panel in a locked position are shown. The mechanical locking means comprise a first tongue and groove surface at the first panel surface and a locking groove and edge surface at the second edge.

[0041] Figure 7 A cross-sectional view of a panel according to an embodiment of the application is shown, the panel comprising a first panel surface and a first edge comprising a first tongue and groove surface, the panel further comprising a second edge comprising a locking groove and edge surface and a second locking surface.

[0042] Figure 8 A cross-sectional view of a panel according to an exemplary embodiment of the application is shown, the panel comprising a first panel surface and a first edge comprising a first tongue and groove surface, the panel further comprising a second edge comprising a locking groove and edge surface and a second locking surface. Figure 7 An enlarged view of a part of the shown embodiment is shown, the mechanical locking means comprising a first slot for positioning the first tongue and further comprising a groove surface.

[0043] Figure 9 A cross-sectional view of a panel according to an exemplary embodiment of the application is shown, the panel comprising a first panel surface and a first edge comprising a first tongue and groove surface, the panel further comprising a second edge comprising a locking groove and edge surface and a second locking surface.

[0044] Figure 10 A cross-sectional view of a panel according to an exemplary embodiment of the application is shown, the panel comprising a first panel surface and a first edge comprising a first tongue and groove surface, the panel further comprising a second edge comprising a locking groove and edge surface and a second locking surface. Figure 9 An enlarged view of a part of the shown embodiment is shown, the panel comprising a second edge comprising a locking groove and edge surface and a second locking surface.

[0045] Figure 11 An enlarged view of a set of panels comprising a first and a second panel with locking means according to an exemplary embodiment of the application is shown. The second edge of the second panel comprises a second tongue comprising a flexible groove.

[0046] Figure 12 A cross-sectional view of a first and a second milling tool when providing a first and / or a second edge according to an exemplary embodiment of the application is shown.

[0047] Figure 13 A cross-sectional view of a panel according to an exemplary embodiment of the application is shown, the panel comprising a first panel surface and a first edge comprising a first tongue and groove surface, the panel further comprising a second edge comprising a locking groove and edge surface and a second locking surface. Figure 12An enlarged view of a portion of the illustrated embodiment, which includes a first milling tool according to an exemplary embodiment of the present invention.

[0048] Figure 14 It shows Figure 12 An enlarged view of a portion of the illustrated embodiment, which includes a second milling tool according to an exemplary embodiment of the present invention.

[0049] Figures 15-17 Different views of a panel according to an exemplary embodiment of the present invention are shown. The panel includes a first panel surface and two first edges, each first edge including a first tenon and a grooved surface.

[0050] Figures 18-20 Different views of a panel according to an exemplary embodiment of the present invention are shown. The panel includes two second edges, each second edge including a locking groove and an edge surface as well as a second locking surface.

[0051] Figures 21-23 Different views of a panel according to an exemplary embodiment of the present invention are shown. The panel includes a first panel surface and two first edges, each first edge including a first tongue and a recessed surface. A slot is positioned to engage with at least one clip.

[0052] Figures 24-29 Different views of a panel according to an exemplary embodiment of the present invention are shown. The panel includes two second edges, each second edge including at least one clip, the clip including a locking groove and an edge surface and a second locking surface. Figures 24-26 A panel fitted with clips is shown, while Figures 27-29 The panel and clips are shown before assembly.

[0053] Figures 30-32 Different views of a set of panels according to an exemplary embodiment of the present invention are shown before assembly. At least one clip is assembled with a second panel.

[0054] Figures 33-35 Different views of a set of panels after assembly are shown according to an exemplary embodiment of the present invention. At least one clip is assembled with a second panel.

[0055] Figures 36A-36I Different views of a card holder according to an exemplary embodiment of the present invention are shown.

[0056] Figures 37-40 Different views of a set of first and second panels after assembly are shown according to an exemplary embodiment of the present invention. Detailed Implementation

[0057] Specific embodiments of the present disclosure will now be described with reference to the drawings. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The terminology used in the detailed description of the embodiments shown in the drawings is intended to explain particular aspects of the application and is not intended to limit the application. In the drawings, like numbers refer to like elements.

[0058] The terminology used herein is for the purpose of describing particular aspects of the present disclosure only and is not intended to limit the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0059] It should be noted that the word "comprising" does not exclude the presence of other elements or steps than those listed and the word "a" or "an" preceding the usage of an element does not exclude the presence of a plurality of such elements. It should also be noted that any reference signs in the claims should not be construed as limiting the scope of the claims. Various exemplary aspects can be implemented at least partly by hardware and software and several "means", "units" or "devices" can be presented by the same item of hardware.

[0060] The different aspects, alternatives and embodiments of the application disclosed herein can be combined with one or more of the other aspects, alternatives and embodiments described herein. Two or more aspects can be combined.

[0061] A first exemplary embodiment of the application is shown in Figures 1-10 , 15-20 and 37-40, which comprises a set of panels comprising a first panel 1 having a first main plane, a second panel 2 having a second main plane. The first panel 1 and the second panel 2 are provided with mechanical locking means configured for locking the first panel 1 to the second panel 2. The first panel 1 comprises a first edge 11 and a first panel surface 12, and the second panel 2 comprises a second edge 21 and a second panel surface 22. In a locked position of the first and second panels, the first main plane is arranged substantially perpendicular to the second main plane.

[0062] The mechanical locking means comprises a panel surface groove 13 at the first panel surface 12, and a locking groove 4 and an edge surface 6 at the second edge 21. The panel surface groove 13 comprises a groove surface 5 and an opposite groove surface 14 comprising a first tongue 3. The first tongue 3 comprises a first locking surface 31, and the locking groove 4 comprises a second locking surface 41. The first locking surface 31 is configured to interact with the second locking surface 41 in the locked position, wherein the first tongue 3 and / or the locking groove 4 is flexible in order to facilitate locking of the first panel to the second panel.

[0063] In the locked position, the mechanical locking device can comprise a space 15 between the recess surface 5 and the edge surface 6.

[0064] The recess surface 5 and the edge surface 6 can be configured to be adjacent and / or opposite each other in the locked position.

[0065] As Figure 2 illustrated, the longitudinal axis 34 of the first tongue 3 extends from the first main plane at a first angle a, the recess surface 5 extends from the first main plane at a second angle b, the second locking surface 41 extends from the second main plane at a third angle g, and the edge surface 6 extends from the second main plane at a fourth angle d. The first angle a > the second angle b and / or the third angle g < the fourth angle d.

[0066] The first locking surface 31 can be configured to interact with the second locking surface 41 in the locked position for achieving the locking in a first direction D1 parallel to the second main plane.

[0067] The first edge 11 can be perpendicular to the first panel surface 12.

[0068] The first angle a can be in the range of about 25° to about 45°, or in the range of about 35° to about 40°.

[0069] The second angle b can be in the range of about 25° to about 45°, or in the range of about 35° to about 40°.

[0070] The third angle g can be in the range of about 65° to about 45°, or in the range of about 55° to about 50°.

[0071] The fourth angle d can be in the range of about 65° to about 45°, or in the range of about 55° to about 50°.

[0072] In an embodiment, the first tongue 3 of the mechanical locking device can be a flexible tongue, for example as Figures 1-6 illustrated in 15-17 and 33-35. The first tongue 3 can be located in the first slot 7.

[0073] The first slot 7 can comprise a wall face 16, an opposite wall face 17, and a bottom face 18 extending between the wall face 16 and the opposite wall face 17. The flexible tongue 3 can be configured to be compressed and / or displaced towards the bottom face 18 during locking of the first panel to the second panel, and to spring back towards the second locking surface 41 when the first panel and the second panel have reached the locked position.

[0074] The first slot 7 can comprise an opening opposite the bottom face 18.

[0075] The centre line 32 can extend between the wall surface 16 and the opposite wall surface 17. The centre line 32 can extend from the first main plane with a centre line angle 33. The centre line angle 33 can be substantially the same as the first angle a.

[0076] The flexible tongue 3 can have a longitudinal shape and the first slot 7 can have a longitudinal shape, wherein the flexible tongue 3 is positioned in the first slot 7 with its length direction parallel to the length direction of the first slot 7.

[0077] For example, the flexible tongue can be configured as shown in WO 2007 / 015669 Figure 6 a-7b or WO 2014 / 209213 Figure 8 A-D or WO 2019 / 203720 Figure 11 A-13B. These figures, as well as the corresponding disclosure in the specification, are hereby incorporated by reference.

[0078] In an embodiment, the first angle a and the second angle b can be substantially the same. Figures 1-2 In a detailed embodiment, the mechanical locking device can comprise at least one rod-shaped element 81 in the panel surface recess 13 of the first panel surface 12 and / or at the second edge 21, and at least one second slot 90 at the opposite first panel surface 12 and / or at the opposite second edge 21. The rod-shaped element 81 is configured to be inserted into the second slot 90 in a locked position. This can increase the stability of the set of panels after assembly. The rod-shaped element 81 can be arranged in a rod-shaped element recess 80.

[0079] The rod-shaped element 81 can be configured to interact with the second slot 90 for achieving the locking in a second direction D2 perpendicular to the first direction.

[0080] The rod-shaped element recess 80 can be a drilled hole. In an embodiment, the drilled hole is a closed bottom drilled hole.

[0081] The slot 90 can be a drilled hole. In an embodiment, the drilled hole is a closed bottom drilled hole.

[0082] The recess surface 5, the edge surface 6 and / or the second locking surface 41 can be a milled surface.

[0083] In an embodiment, the difference between the first angle a and the second angle b can be between 0° and 10°.

[0084] In an embodiment, the difference between the third angle g and the fourth angle d can be between 0° and 10°.

[0085] The second edge 21 of the second panel 2 can comprise a second tongue 23. As Figure 11As shown, the second tongue 23 can comprise a flexible groove 24. This facilitates guiding the first panel 1 and the second panel 2 to the correct locking position during assembly.

[0086] According to an aspect, as Figures 24-36I As shown, the second edge 21 of the second panel 2 is not provided with the second locking surface 41 and the edge surface 6 by milling. According to this aspect, the second edge 21 of the second panel 2 can be provided with a clip 300. The clip 300 can be provided with the locking groove 4 comprising the second locking surface 41, the edge surface 6 and the rod-like element 81. The clip 300 can further be provided with a connecting element 302 for connecting the clip 300 to the panel. According to an aspect, the second panel 2 can be provided with one or more connecting grooves 301 for receiving the connecting element 302. The connecting element 302 can be glued in the connecting groove 301.

[0087] Figures 24-26 A second panel 2 equipped with a clip 300 is shown, while Figures 27-29 A second panel 2 and a clip 300 before assembly are shown. Figures 36A-36I A detailed view of the clip 300 is shown. According to an aspect, the clip 300 can be made of plastic or metal.

[0088] According to an aspect, the invention also relates to a method of providing a first panel 1 and / or a second panel 2 with a mechanical locking device configured for locking the first panel 1 to the second panel 2. The first panel 1 comprises a first edge 11 and a first panel surface 12, and the second panel 2 comprises a second edge 21 and a second panel surface 22. The method comprises providing the first panel surface 12 of the first panel 1 with a slot 7 and a groove surface 5 of the locking device by milling. Milling is performed using a first milling tool 100 in a single operation only. This can produce a panel comprising a locking device that is easy and fast to manufacture and that can reduce production costs. Furthermore, manufacturing tolerances of the locking profile can be improved. The first milling tool 100 and its use are shown in Figures 12-13 .

[0089] The method can be configured for producing a set of panels according to the invention as described hereinabove.

[0090] According to an aspect, the application also relates to a method of providing a first panel 1 and / or a second panel 2 with a mechanical locking device configured for locking the first panel 1 to the second panel 2. The first panel 1 comprises a first edge 11 and a first panel surface 12, and the second panel 2 comprises a second edge 21 and a second panel surface 22. The method comprises providing the second edge 21 of the second panel 2 with a second locking surface 41 and an edge surface 6 by milling. Milling is performed in a single operation only and using a second milling tool 200 only. The method further comprises providing the second locking surface 41 and the edge surface 6 at opposite sides of the second tongue 23. The second milling tool 200 and its use are shown in Figure 12 and 14 .

[0091] In an embodiment, the method can comprise the method as described above. The method can be configured for producing a set of panels according to the application as described above.

[0092] The first panel 1 and / or the second panel 2 can comprise one or more of said first edges 11. The first panel 1 and / or the second panel 2 can comprise one or more of said second edges 21. For example, a panel comprising one said first edge 11 and one said second edge 21 is shown in Figure 7 and 9 . A panel comprising two said first edges 11 is shown for example in Figures 15-17 and 21-23, and a panel comprising two said second edges 21 is shown for example in Figures 18-20 .

[0093] According to an embodiment, four panels each comprising a first edge 11 and a second edge 21 can be assembled into a furniture product.

[0094] According to an embodiment, four panels can be assembled into a furniture product, for example a furniture frame. The furniture product can comprise two panels each having two said first edges 11 and two other panels each having two said second edges 21, which can be assembled into a furniture product.

[0095] The core of the first panel 1 and / or the second panel 2 can be a wood-based core, which can be made of MDF, HDF, OSB, WPC, plywood or chipboard. The core can also be a plastic core, which comprises a thermoset plastic or a thermoplastic, for example vinyl, PVC, PU or PET. The plastic core can comprise a filler.

[0096] The first panel 1 and / or the second panel 2 can also be solid wood.

[0097] The first panel 1 and / or the second panel 2 can be provided with a decorative layer, for example a foil or a veneer, on one or more surfaces.

[0098] According to an aspect, the set of panels is a resilient panel. The resilient panel can comprise a core comprising a thermoplastic material. The thermoplastic material can be foamed.

[0099] The thermoplastic material can comprise polyvinyl chloride (PVC), polyester, polypropylene (PP), polyethylene (PE), polystyrene (PS), polyurethane (PU), polyethylene terephthalate (PET), polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof. The core can be formed of several layers.

[0100] The aspects described above can comprise a decorative layer, for example a decorative foil comprising a thermoplastic material. The thermoplastic material of the decorative layer can be or comprise polyvinyl chloride (PVC), polyester, polypropylene (PP), polyethylene (PE), polystyrene (PS), polyurethane (PU), polyethylene terephthalate (PET), polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof. The decorative foil can be printed, for example by direct printing, rotogravure printing or digital printing. According to an aspect, the decorative layer comprises melamine, high pressure laminate (HPL) or veneer.

[0101] The aspects described above can comprise a wear layer, for example a film or foil. The wear layer can comprise a thermoplastic material. The thermoplastic material can be polyvinyl chloride (PVC), polyester, polypropylene (PP), polyethylene (PE), polystyrene (PS), polyurethane (PU), polyethylene terephthalate (PET), polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof.

[0102] The aspects described above can comprise a wood-based core, for example HDF, MDF, plywood, chipboard, OSB or Masonite.

[0103] The different aspects, embodiments and alternatives described above can be combined with one or more of the other described aspects, embodiments and alternatives.

[0104] Further embodiments of the application are described as follows:

[0105] 1. A set of panels comprising a first panel 1 having a first main plane, a second panel 2 having a second main plane, and a mechanical locking device configured for locking the first panel 1 to the second panel 2, wherein the first panel 1 comprises a first edge 11 and a first panel surface 12, the second panel 2 comprises a second edge 21 and a second panel surface 22, in a locked position of the first panel and the second panel, the first main plane is arranged substantially perpendicular to the second main plane, wherein

[0106] - the mechanical locking device comprises a first tongue 3 and a groove surface 5 in a panel surface groove 13 of the first panel surface 12, and a locking groove 4 and an edge surface 6 at the second edge 21,

[0107] - the first tongue 3 comprises a first locking surface 31,

[0108] - the locking groove 4 comprises a second locking surface 41,

[0109] - the first locking surface 31 is configured to interact with the second locking surface 41 in a locked position, wherein the first tongue 3 and / or the locking groove 4 is flexible to facilitate locking of the first panel to the second panel,

[0110] - the first tongue 3 extends from the first main plane at a first angle a,

[0111] - the groove surface 5 extends from the first main plane at a second angle b,

[0112] - the second locking surface 41 extends from the second main plane at a third angle g,

[0113] - the edge surface 6 extends from the second main plane at a fourth angle d,

[0114] - and wherein the first angle a is larger than the second angle b and / or the third angle g is smaller than the fourth angle d.

[0115] 2. The set of panels according to embodiment 1, wherein the first angle a is in the range of about 25° to about 45°, or in the range of about 35° to about 40°.

[0116] 3. The set of panels according to embodiment 1 or 2, wherein the second angle b is in the range of about 25° to about 45°, or in the range of about 35° to about 40°.

[0117] 4. The set of panels according to any of the preceding embodiments, wherein the third angle g is in the range of about 65° to about 45°, or in the range of about 55° to about 50°.

[0118] 5. The set of panels according to any of the preceding embodiments, wherein the fourth angle d is in the range of about 65° to about 45°, or in the range of about 55° to about 50°.

[0119] 6. The set of panels according to any of the preceding embodiments, wherein the first tongue 3 is a flexible tongue.

[0120] 7. The set of panels according to any of the preceding embodiments, wherein the first tongue 3 is located in a first slot 7.

[0121] 8. The set of panels according to any of the preceding embodiments, wherein the mechanical locking device further comprises at least one rod-shaped element 81 in the panel surface groove 13 of the first panel surface 12 and / or at the second edge 21, and at least one second slot 90 at the opposite first panel surface 12 and / or at the opposite second edge 21, and wherein the rod-shaped element 81 is configured to be inserted into the second slot 90 in the locked position.

[0122] 9. The set of panels according to embodiment 8, wherein the rod-shaped element 81 is arranged in a rod-shaped element groove 80.

[0123] 10. The set of panels according to embodiment 9, wherein the rod-shaped element groove 80 is a drilled hole.

[0124] 11. The set of panels according to any of embodiments 8-10, wherein the second slot 90 is a drilled hole.

[0125] 12. The set of panels according to embodiment 10 or embodiment 11, wherein the drilled hole is a closed bottom drilled hole.

[0126] 13. The set of panels according to any of the preceding embodiments, wherein the groove surface 5, the edge surface 6 and / or the second locking surface 41 is a milled surface.

[0127] 14. The set of panels according to any of the preceding embodiments, wherein the difference between the first angle a and the second angle b is not more than 10°.

[0128] 15. The set of panels according to any of the preceding embodiments, wherein the difference between the third angle g and the fourth angle d is not more than 10°.

[0129] 16. The set of panels according to any of the preceding embodiments, wherein the second edge 21 of the second panel 2 comprises a second tongue 23, and wherein the second tongue 23 comprises a flexible groove 24.

[0130] 17. A method of providing a mechanical locking device for a first panel 1 and / or a second panel 2, the mechanical locking device being configured for locking the first panel 1 to the second panel 2, wherein the first panel 1 comprises a first edge 11 and a first panel surface 12, and the second panel 2 comprises a second edge 21 and a second panel surface 22, wherein the method comprises:

[0131] providing the locking device of the first panel surface 12 of the first panel 1 with a slot 7 and a groove surface 5 by milling using only a single milling tool 100 in a single operation.

[0132] 18. The method according to embodiment 17, configured for manufacturing a set of panels according to any one of embodiments 1-16.

[0133] 19. A method of providing a first panel 1 and / or a second panel 2 with a mechanical locking device configured for locking the first panel 1 to the second panel 2, wherein the first panel 1 comprises a first edge 11 and a first panel surface 12, and the second panel 2 comprises a second edge 21 and a second panel surface 22, wherein the method comprises:

[0134] providing the second edge 21 of the second panel 2 with a second locking surface 41 and an edge surface 6 by milling only using a second milling tool 200 in only a single operation, and

[0135] providing the second locking surface 41 and the edge surface 6 on opposite sides of the second tongue 23.

[0136] 20. The method according to embodiment 19, wherein the method comprises the method according to embodiment 17.

[0137] 21. The method according to embodiment 19 or 20, configured for manufacturing a set of panels according to any one of embodiments 1-16.

Claims

1. Set of panels, comprising a first panel (1) having a first main plane, a second panel (2) having a second main plane, and a mechanical locking device configured for locking the first panel (1) to the second panel (2), wherein the first panel (1) comprises a first edge (11) and a first panel surface (12), the second panel (2) comprises a second edge (21) and a second panel surface (22), in a locked position of the first and second panel the first main plane is arranged substantially perpendicular to the second main plane, wherein: - the mechanical locking device comprises a panel surface groove (13) at the first panel surface (12), and a locking groove (4) and an edge surface (6) at the second edge (21), - the panel surface groove (13) comprises a groove surface (5) and an opposite groove surface (14), the opposite groove surface (14) comprises a first tongue (3), - the first tongue (3) comprises a first locking surface (31), - the locking groove (4) comprises a second locking surface (41), - the first locking surface (31) is configured to interact with the second locking surface (41) in the locked position, wherein the first tongue (3) is flexible to facilitate locking the first panel to the second panel, - a longitudinal axis (34) of the first tongue (3) extends from the first main plane under a first angle (a), - the groove surface (5) extends from the first main plane under a second angle (β), - the second locking surface (41) extends from the second main plane under a third angle (γ), - the edge surface (6) extends from the second main plane under a fourth angle (δ), - the first angle (a) is larger than the second angle (β), and - the first angle (a) is in the range of 25° to 45°.

2. The set of panels according to claim 1, wherein, the second angle (β) is in the range of 25° to 45°.

3. The set of panels according to claim 1, wherein, the third angle (γ) is in the range of 65° to 45°.

4. The set of panels according to claim 1, wherein, the fourth angle (δ) is in the range of 65° to 45°.

5. The set of panels according to any of the claims 1 to 4, wherein, the first angle (a) is in the range of 35° to 40°.

6. The set of panels according to any of the claims 1 to 4, wherein, the first tongue (3) is located in a first slot (7).

7. The set of panels according to claim 6, wherein, the first slot (7) comprises a wall surface (16), an opposite wall surface (17), and a bottom surface (18) extending between the wall surface (16) and the opposite wall surface (17).

8. The set of panels according to claim 7, wherein, the first tongue (3) is configured to be compressed and / or displaced towards the bottom surface (18) during locking of the first panel to the second panel, and to spring back towards the second locking surface (41) when the first and second panel have reached the locked position.

9. The set of panels according to claim 7, wherein, the first slot (7) comprises an opening opposite the bottom surface (18).

10. The set of panels according to any of the claims 7-9, wherein, a centre line (32) extends between the wall surface (16) and the opposite wall surface (17), wherein the centre line (32) extends from the first main plane under a centre line angle (33), wherein the centre line angle (33) is substantially the same as the first angle (a).

11. The set of panels according to any of the claims 1 to 4, wherein, The mechanical locking device further comprises at least one rod-shaped element (81) at the first panel surface (12) and / or the second edge (21), and at least one second slot (90) at the opposite first panel surface (12) and / or the opposite second edge (21), and wherein the rod-shaped element (81) is configured to be inserted into the second slot (90) in the locked position.

12. The set of panels according to claim 11, wherein, The rod-shaped element (81) is arranged in a rod-shaped element recess (80).

13. The set of panels according to claim 12, wherein, The rod-shaped element recess (80) is a drilled hole.

14. The set of panels according to claim 11, wherein, The second slot (90) is a drilled hole.

15. The set of panels according to claim 13 or 14, wherein, The drilled hole is a closed bottom drilled hole.

16. The set of panels according to any of the claims 1-4, wherein, The recess surface (5), the edge surface (6) and / or the second locking surface (41) are milled surfaces.

17. The set of panels according to any of the claims 1-4, wherein, The difference between the first angle (a) and the second angle (b) is between 0° and 10°.

18. The set of panels according to claim 1, wherein, The third angle (g) is smaller than the fourth angle (d).

19. The set of panels according to claim 18, wherein, The difference between the third angle (g) and the fourth angle (d) is between 0° and 10°.

20. The set of panels according to any of the claims 1-4, wherein, The second edge (21) of the second panel (2) comprises a second tongue (23), and the second tongue (23) comprises a flexible groove (24).

21. The set of panels according to any of the claims 1-4, wherein, The second angle (b) is in the range of 35° to 40°.

22. The set of panels according to any of the claims 1-4, wherein, The third angle (g) is in the range of 55° to 50°.

23. The set of panels according to any of the claims 1-4, wherein, The fourth angle (d) is in the range of 55° to 50°.

24. A method for manufacturing a set of panels according to any of the claims 1 to 23, the method providing a first panel (1) and / or a second panel (2) with a mechanical locking device configured for locking the first panel (1) to the second panel (2), wherein the first panel (1) comprises a first edge (11) and a first panel surface (12), and the second panel (2) comprises a second edge (21) and a second panel surface (22), wherein the method comprises: providing the first panel surface (12) of the first panel (1) with a recess surface (5) and a slot of the locking device by milling only in a single operation using a first milling tool (100).

25. A method for manufacturing a set of panels according to any of the claims 1 to 23, the method providing a first panel (1) and / or a second panel (2) with a mechanical locking device configured for locking the first panel (1) to the second panel (2), wherein the first panel (1) comprises a first edge (11) and a first panel surface (12), and the second panel (2) comprises a second edge (21) and a second panel surface (22), wherein the method comprises: providing the second edge (21) of the second panel (2) with a second locking surface (41) and an edge surface (6) by milling only in a single operation using only a second milling tool (200); and providing the second locking surface (41) and the edge surface (6) on opposite sides of a second tongue (23).

26. A method for manufacturing a set of panels according to any one of claims 1 to 23, the method providing a first panel (1) and a second panel (2) with a mechanical locking device configured for locking the first panel (1) to the second panel (2), wherein the first panel (1) comprises a first edge (11) and a first panel surface (12), and the second panel (2) comprises a second edge (21) and a second panel surface (22), wherein, The method comprises providing a groove and a recess surface (5) of a locking device for a first panel surface (12) of a first panel (1) by milling in a single operation using a first milling tool (100); providing a second locking surface (41) and an edge surface (6) for a second edge (21) of a second panel (2) by milling in a single operation using a second milling tool (200); and providing the second locking surface (41) and the edge surface (6) on opposite sides of a second tongue (23).

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