A hinge structure of a door panel and a door panel

Abstract

The utility model relates to a door panel and door panel hinged structure relates to metal door technical field, including first door panel, second door panel, recess part, boss part and hinge. First door panel is equipped with recess part, and second door panel is equipped with corresponding embedded boss part, and both are connected through multiple hinges, ensure that the structure of blocking seam is formed when closing. Recess part and boss part are surrounded by the bending of inner and outer panel or connecting plate respectively, enhance local rigidity and prevent filler from flowing out. The recess is equipped with sealing strip, improves sealing performance, and the hinge fixing plate combines the arc connecting plate, guarantees structural strength and cooperation precision. The design not only simplifies production process, but also improves the sealing property, the degree of beauty and the adaptability to different environment. In addition, screw penetrates three layers of structure and realizes synchronous fastening, increases assembly reliability. The utility model is excellent in sealing, strength, manufacturing, assembly and appearance.

Description

Technical Field

[0001] This utility model relates to the field of metal door technology, and in particular to a hinge structure between door panels. Background Technology

[0002] In existing technologies, hinge structures between door panels generally suffer from problems such as poor sealing, low assembly precision, and insufficient structural compatibility.

[0003] (1) Traditional double or multi-door systems usually use planar butt joints or simple overlaps to close the door panels. There are often obvious gaps between the hinge edges of the two door panels, which not only affect the overall aesthetics, but also easily lead to the leakage of light, sound and hot and cold air, making it difficult to meet the high standards of sound insulation, heat preservation and air tightness required by modern buildings.

[0004] (2) The internal filling structure (such as polyurethane foam, rock wool, etc.) widely used to improve the performance of the door can improve the heat insulation and sound insulation effect, but often the filling area and the lock installation space interfere with each other, causing key components such as the hollow controller to be unable to be installed smoothly or to be restricted in operation, thus reducing the reliability and versatility of the door lock system.

[0005] (3) Existing hinge structures also have significant defects in manufacturing processes. Most door panels rely on manual bending equipment to form the hinge edges section by section. Due to the influence of steel plate material, thickness and batch differences, coupled with the lack of an effective size compensation mechanism, the finished products have poor consistency and the closing gap is difficult to control. Although large mold extrusion can achieve mass production, its flexibility is poor and it is difficult to adapt to the diverse structural needs of non-standard customized doors. Although small parts can achieve high precision through standardized stamping, the main body of the door still needs to be spliced ​​and combined with various steel plates, and the overall structure is difficult to achieve modularization and high-precision assembly. Especially in the hinge installation area, traditional hinge installation processes are prone to loosening, deformation or even failure after long-term use, which seriously affects the stability and durability of the door opening and closing.

[0006] (4) There are few existing technologies that actively compensate for door gap deviations. Since processing errors are unavoidable, small deviations in the lateral dimensions of the door panel can easily form visible gaps or misalignments when closed, which not only weakens the sealing effect but also affects the appearance quality of the product. Although some solutions attempt to improve airtightness by adding sealing strips, the sealing structure is often independent of the door panel body and lacks coordinated design with the hinge mating surface, making it difficult to achieve uniform pressure and long-term sealing.

[0007] In summary, there is an urgent need for a new type of door panel hinge structure that can balance structural strength, assembly precision, and functional integration, while also effectively compensating for manufacturing errors and improving sealing performance, in order to overcome the multiple limitations of the existing technologies. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, this utility model discloses a hinge structure between door panels.

[0009] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0010] A hinge structure for connecting door panels, comprising:

[0011] The first door panel;

[0012] The recessed portion is located on the hinge edge of the first door panel;

[0013] The second door panel is located on one side of the hinge edge of the first door panel;

[0014] The boss is located on the hinge side of the second door panel;

[0015] The hinge consists of multiple hinges installed at intervals between the hinge edges of the first door panel and the hinge edges of the second door panel; used to make the first door panel and the second door panel correspondingly hinged; when the first door panel and the second door panel are closed, the boss portion is inserted into the groove portion to form a gap-blocking structure.

[0016] Both the first door panel and the second door panel are composed of an inner panel and an outer panel.

[0017] Preferably, the groove is formed by bending the inner or outer panel of the first door panel.

[0018] Preferably, the inner and outer panels of the first door panel are provided with a U-shaped bending structure on one side of the corresponding groove, and the inner and outer panels of the first door panel are connected by a connecting plate on this side; the U-shaped bending structure of the inner and outer panels and the connecting plate together form the groove.

[0019] Preferably, the boss portion is formed by bending the inner or outer panel of the second door panel.

[0020] Preferably, the inner panel and the outer panel of the second door panel are connected on one side of the corresponding boss portion by an arc-shaped connecting plate, and the boss portion is formed by the arc-shaped connecting plate.

[0021] Preferably, a plurality of hinge fixing plates are installed on the inner side of the bow-shaped connecting plate; one connecting part of the hinge is fastened to one of the hinge fixing plates.

[0022] Preferably, the bow-shaped connecting plate has a groove connecting part on one or both sides corresponding to its protrusion; the inner panel and outer panel of the second door panel are connected to the corresponding groove connecting parts by a bending structure; the hinge fixing plate has a recessed structure at the position corresponding to the groove connecting part; the groove connecting part of the bow-shaped connecting plate is locked in the corresponding recessed structure of the hinge fixing plate; the opening size of the protrusion of the bow-shaped connecting plate is limited by the hinge fixing plate.

[0023] Preferably, the groove connection portion is provided with a weld or fastener formed by welding; used to fasten the bow-shaped connecting plate and the hinge fixing plate accordingly; or to fasten the bow-shaped connecting plate, the hinge fixing plate, and the inner and outer panels of the second door panel accordingly.

[0024] Preferably, a baffle is installed inside the groove connection portion.

[0025] Preferably, a hinge mounting box is installed on the first door panel at the position corresponding to the hinge.

[0026] Preferably, a sealing strip is installed in the groove; when the first door panel and the second door panel are closed, the boss part abuts against the sealing strip to form a sealing structure.

[0027] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0028] (1) This utility model provides a longitudinally extending groove on the hinge side of the first door panel and a longitudinally extending boss on the hinge side of the second door panel, so that the two door panels form a tightly fitted gap-blocking structure when closed, effectively concealing the door gap, significantly improving the sealing performance of the door, preventing light, sound and hot and cold air from leaking through the gap, and visually weakening the seam and enhancing the overall aesthetics. The boss adopts a hollow design, reserving independent installation space for the hollow door lock controller, avoiding interference from the sound insulation and heat insulation materials such as polyurethane foam, rock wool or honeycomb paper core filled inside the door panel, thereby ensuring the normal installation and reliable operation of the lock control mechanism, and improving the compatibility and stability of the door lock system.

[0029] (2) In terms of structural manufacturing, both the groove and the boss can be integrally formed from the inner or outer panel of the door panel through sheet metal bending, eliminating the need for additional parts and simplifying the production process; or the inner and outer panels can be combined with connecting plates or bow-shaped connecting plates to form the required structure, which not only enhances local rigidity but also effectively prevents the filler from overflowing from the edge of the door panel. In particular, the connecting plate or bow-shaped connecting plate, as a supporting component, can precisely control the consistency of the door panel thickness, providing dimensional assurance for subsequent hinge installation and door gap fit. In addition, the combination design of the hinge fixing plate and the bow-shaped connecting plate uses the high-rigidity hinge fixing plate to constrain the shape of the thin-walled bow-shaped connecting plate, effectively suppressing its bending springback and elastic deformation during use, thereby ensuring the fit accuracy of the boss and the groove, and making up for the problem of insufficient processing accuracy of traditional thin sheet metal parts.

[0030] (3) In terms of sealing performance, the groove is provided with a sealing strip. When closed, the boss squeezes the sealing strip to generate compression deformation, forming a reliable sealing interface. The sealing strip can be set alone in the middle of the groove, which is suitable for general sealing needs, or it can be set on both sides of the groove to provide a more uniform sealing pressure distribution and meet the requirements of high sealing performance. The number and spacing of hinges can be flexibly configured according to the height of the door panel and the load-bearing requirements. At the same time, by replacing hinges with different structures or thicknesses, the closing gap between the two door panels can be adjusted to improve the product's adaptability to different installation environments. The thickness of the hinge fixing plate is 1 to 3 times that of the bow-shaped connecting plate, which significantly enhances the local load-bearing capacity and prevents deformation caused by long-term stress. The extra hinge fixing plate can also be used as a reinforcing rib to further improve the overall structural strength, especially suitable for large-size or high-load doors.

[0031] (4) The protruding part of the bow-shaped connecting plate of this utility model is provided with groove connecting parts on both sides. The inner and outer panels of the door panel are fastened to it by bending structure, which not only hides the cutting edge and improves the appearance, but also enhances the connection strength through mechanical interlocking, avoiding the failure risk that may be caused by adhesive or spot welding. The corresponding position of the hinge fixing plate is provided with a recessed structure, which fits into the groove connecting part to form a limiting fit, further controlling the stability of the opening size. The screw can pass through the three-layer structure to achieve synchronous fastening, and the connection method can be flexibly selected according to the force requirements to improve the assembly reliability; the stop strip covers the top of the screw, which not only covers the screw head to improve the aesthetics, but also fills the installation recess to ensure that the door panel surface is flat and continuous. In summary, this hinge structure shows significant beneficial technical effects in terms of sealing performance, structural strength, manufacturing precision, assembly flexibility and appearance consistency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the installation structure of the sealing strip;

[0034] Figure 3 This is a schematic diagram of the groove section;

[0035] Figure 4 This is a structural diagram of the boss section;

[0036] Figure 5 This is a schematic diagram of the bow-shaped connecting plate.

[0037] Figure 6 This is a schematic diagram of the hinge installation structure.

[0038] In the diagram: 1. First door panel; 2. Second door panel; 3. Recessed part; 4. Bossed part; 5. Connecting plate; 6. Bow-shaped connecting plate; 7. Hinge fixing plate; 8. Recessed connecting part; 9. Fastener; 10. Stop bar; 11. Hinge; 12. Hinge mounting box; 13. Sealing strip. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Example 1:

[0043] Combined with appendix Figures 1-2 A hinged structure for a door panel includes a first door panel 1, a second door panel 2, and hinges 11. A groove 3 is provided on the hinge edge of the first door panel 1, extending longitudinally along the hinge edge to form a closed fit with the second door panel 2. The second door panel 2 is located on one side of the hinge edge of the first door panel 1, and the two are rotatably connected by multiple hinges 11. Both the first door panel 1 and the second door panel 2 are composed of inner and outer panels. Typically, a filler material that enhances hardness, sound insulation, and heat insulation properties, such as polyurethane foam, rock wool, or honeycomb paper core, is filled between the inner and outer panels of the first door panel 1 and the second door panel 2. The filler material can be pre-attached to one of the decorative panels, and then the other panel is snapped and pressed together to form a complete door panel structure, effectively improving the overall performance of the door and simplifying the assembly process.

[0044] A boss 4 is provided on the hinge side of the second door panel 2, and the boss 4 is arranged longitudinally along the hinge side. The interior of the boss 4 is hollow, which is used to reserve installation space for the hollow controller of the door panel lock. Since this space is independent of the filling area, even if the interior of the door panel is filled with sound insulation or heat insulation material, it will not interfere with the installation position and operating space of the hollow controller, ensuring that the lock control mechanism can be installed and operated normally, and improving the compatibility and reliability of the door lock system.

[0045] Multiple hinges 11 are installed at intervals between the hinge edges of the first door panel 1 and the second door panel 2. The number and spacing of the hinges 11 are determined according to the door panel height and load-bearing requirements. One connecting part of each hinge 11 is fixed to the first door panel 1, and the other connecting part is fixed to the second door panel 2, enabling a stable rotational connection between the two door panels. When the first door panel 1 and the second door panel 2 are closed, the protrusion 4 inserts into the groove 3, forming a gap-blocking structure that effectively blocks the gap between the two door panels, preventing light, sound, or hot and cold air from leaking through the gap, thus improving the door's sealing performance and overall appearance consistency. Furthermore, this gap-blocking structure visually minimizes the appearance of the door gap, enhancing the product's aesthetics.

[0046] It is worth noting that when the first door panel 1 and the second door panel 2 are closed, there is a large overlapping area between the boss portion 4 and the groove portion 3. This design can effectively compensate for the deviation in the lateral dimensions of the first door panel 1 and / or the second door panel 2 caused by processing errors, avoiding obvious gaps or misalignments due to inconsistent dimensions. At the same time, by replacing the hinges 11 with different thicknesses or structural forms, the gap between the hinge edges of the first door panel 1 and the second door panel 2 can be adjusted to adapt to different installation environments or usage requirements, improving the product's versatility and adaptability.

[0047] Furthermore, as shown in the appendix Figure 2 As shown, a sealing strip 13 is installed within the groove 3; the sealing strip 13 is preferably an airbag sealing strip, which provides better sealing performance. When the first door panel 1 and the second door panel 2 are closed, the protrusion 4 contacts the sealing strip 13 and undergoes compression deformation, thereby forming a reliable sealing structure and further improving sound insulation, heat preservation, and dustproof performance. The sealing strip 13 can be configured as one strip, installed in the middle of the groove 3; or it can be configured as two strips, installed on the inner walls of both sides of the groove 3 respectively. A single sealing structure is suitable for scenarios with general sealing requirements, while a double-strip structure can provide a more uniform sealing pressure distribution and is suitable for occasions with higher sealing performance requirements.

[0048] Example 2:

[0049] Combined with appendix Figures 1-3 A hinged structure for connecting door panels, differing from Embodiment 1 in that, based on Embodiment 1, as shown in the attached figure... Figure 1 and 2 As shown, the groove 3 is integrally formed from the inner or outer panel of the first door panel 1 through a bending structure. This bending structure directly forms the required groove shape on the edge of the panel using sheet metal processing, simplifying the manufacturing process.

[0050] Or, as attached Figure 3 As shown, both the inner and outer panels of the first door panel 1 have U-shaped bending structures on one side of the corresponding groove 3, and the inner and outer panels are connected and fixed on this side by a connecting plate 5. The U-shaped bending structures of the inner and outer panels, along with the connecting plate 5, together form the groove 3. This structure not only enhances the rigidity of the groove 3 but also effectively prevents the filler from overflowing from the edge of the door panel. The connecting plate 5, as a supporting component between the inner and outer panels, can have its length and thickness customized according to the door panel thickness. This allows for precise control of the spacing between the inner and outer panels of the first door panel 1, ensuring the consistency of the overall door panel thickness and facilitating subsequent hinge installation and control of door gap fit accuracy.

[0051] Example 3:

[0052] Combined with appendix Figure 1 , 3 ~6, a hinge structure between door panels, based on embodiment one or embodiment two, as shown in the appendix. Figure 1 As shown, the boss portion 4 is integrally formed from the inner or outer panel of the second door panel 2 through a bending structure. This method utilizes sheet metal bending technology to directly form the boss structure on the edge of the door panel, avoiding the introduction of additional parts and simplifying the assembly process.

[0053] Or, as attached Figure 4 As shown, the inner and outer panels of the second door panel 2 are connected on one side of the corresponding boss portion 4 by an arc-shaped connecting plate 6, which forms the main structure of the boss portion 4. The two ends of the arc-shaped connecting plate 6 are fixedly connected to the inner and outer panels respectively, and the protruding part in the middle forms the outer contour of the boss portion 4. This structure facilitates the reservation of a hollow space inside the boss portion 4 to accommodate components such as the door lock controller, while keeping the door panel surface flat.

[0054] Furthermore, a plurality of hinge fixing plates 7 are installed on the inner side of the bow-shaped connecting plate 6; the first door panel 1 is provided with a hinge mounting box 12 at the position corresponding to the hinge 11, as shown in the attached figure. Figure 3 As shown, the hinge mounting box 12 is a standard component in the prior art, and its specific structure will not be described in detail here. One connecting part of the hinge 11 is fastened to one of the hinge fixing plates 7 by screws or rivets, or by welding, while the other connecting part is fastened to the corresponding hinge mounting box 12, as shown in the attached figure. Figure 6As shown. This connection method allows the installation position of hinge 11 to be jointly defined by hinge fixing plate 7 and hinge mounting box 12, which effectively improves the installation accuracy of hinge 11, thereby facilitating precise control of the closing gap between the first door panel 1 and the second door panel 2, and reducing uneven door gaps or jamming problems caused by installation deviations.

[0055] Meanwhile, the thickness of the hinge fixing plate 7 is 1 to 3 times that of the bow-shaped connecting plate 6. The thicker hinge fixing plate 7 can significantly enhance the load-bearing capacity of the local connection area and prevent the bow-shaped connecting plate 6 from deforming under long-term stress, thereby improving the durability and stability of the entire hinge structure. In addition, the number of hinge fixing plates 7 can be more than the actual number of hinges 11 required to be installed. Although the extra hinge fixing plates 7 do not directly connect to the hinges 11, they can be used as reinforcing ribs to further improve the overall structural strength of the bow-shaped connecting plate 6, which is especially suitable for applications with large-size or high-load doors.

[0056] In existing technologies, door panel hinge edge structures typically rely on manual bending machines for segment-by-segment processing. Due to variations in the material, thickness, and batch of steel plates purchased from different manufacturers, coupled with fluctuations in processing techniques, the finished product dimensions suffer from poor consistency. While large-scale die extrusion allows for mass production, it struggles to meet the diverse structural requirements of non-standard customized doors, and workpiece precision is difficult to standardize. In contrast, small components can achieve high consistency through standardized stamping, but the door itself, due to its high degree of customization, still requires the combination of multiple steel plates, making it difficult to standardize the hinge edge structure.

[0057] To address the aforementioned issues, this embodiment is further improved: the arc-shaped connecting plate 6 has a grooved connecting portion 8 on one or both sides of its protruding portion, as shown in the attached figure. Figure 5 As shown in the attached diagram. The inner and outer panels of the second door panel 2 are respectively fastened to the corresponding groove connecting parts 8 through a bending structure, as shown in the attached diagram. Figure 4 As shown. This connection method not only hides the cut edges of the inner and outer panels, improving the cleanliness of the appearance, but also enhances the connection strength through mechanical interlocking, avoiding the failure risks that may be caused by adhesive bonding or spot welding.

[0058] The hinge fixing plate 7 has a recessed structure at the position of the corresponding groove connecting part 8. The groove connecting part 8 of the arc-shaped connecting plate 6 is embedded in the recessed structure to form a limiting fit. This design constrains the opening size of the protrusion of the arc-shaped connecting plate 6 by the hinge fixing plate 7, effectively controlling its elastic deformation during processing and use, and ensuring the fitting accuracy between the boss part 4 and the groove part 3. The hinge fixing plate 7, as a small sheet metal part, is small in size and thick, and is easy to manufacture with high precision through stamping or CNC machining; while the arc-shaped connecting plate 6, as a large-area thin-walled part, has low rigidity and is prone to springback deformation after bending, especially the opening size of the protrusion is difficult to control stably. By combining the two, the high-rigidity hinge fixing plate 7 constrains the shape of the arc-shaped connecting plate 6, which not only makes up for the precision defects of the thin sheet metal, but also improves the overall structural strength.

[0059] Fasteners 9, or welds formed by welding, are installed within the grooved connecting portion 8. The fasteners 9 can be screws or rivets, etc., used to securely connect the bow-shaped connecting plate 6 to the hinge fixing plate 7. Alternatively, the fasteners 9 can penetrate the hinge fixing plate 7 to further connect to the inner or outer panel of the second door panel 2, achieving simultaneous fixing of the three-layer structure. This multi-purpose connection method improves assembly flexibility, allowing for the selection of different fastening schemes according to actual stress requirements, ensuring reliable connection.

[0060] In addition, a baffle 10 is installed in the groove connection part 8. The baffle 10 covers the fastener 9, which can not only cover the screw head to avoid it being exposed and affecting the appearance, but also fill the depression or gap formed by the screw installation, so that the door panel surface remains flat and continuous, improving the overall visual effect and user experience.

[0061] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A hinge structure between door panels, characterized in that, include: First door panel (1); The groove (3) is located on the hinge side of the first door panel (1); The second door panel (2) is located on one side of the hinge edge of the first door panel (1); The boss (4) is located on the hinge side of the second door panel (2); Hinges (11) are multiple hinges installed at intervals between the hinge sides of the first door panel (1) and the hinge sides of the second door panel (2); used to make the first door panel (1) and the second door panel (2) hinged together; when the first door panel (1) and the second door panel (2) are closed, the boss part (4) is inserted into the groove part (3) to form a gap-blocking structure. The first door panel (1) and the second door panel (2) are both composed of an inner panel and an outer panel.

2. The hinge structure between door panels as described in claim 1, characterized in that: The groove (3) is formed by bending the inner or outer panel of the first door panel (1).

3. The hinge structure between door panels as described in claim 1, characterized in that: The inner panel and outer panel of the first door panel (1) are provided with a U-shaped bending structure on one side of the groove (3), and the inner panel and outer panel of the first door panel (1) are connected by a connecting plate (5); the U-shaped bending structure of the inner panel and outer panel together with the connecting plate (5) form the groove (3).

4. The hinge structure between door panels as described in claim 2 or 3, characterized in that: The boss (4) is formed by bending the inner or outer panel of the second door panel (2).

5. The hinge structure between door panels as described in claim 2 or 3, characterized in that: The inner panel and outer panel of the second door panel (2) are connected on one side of the corresponding boss part (4) by an arc-shaped connecting plate (6), and the boss part (4) is formed by the arc-shaped connecting plate (6).

6. The hinge structure between door panels as described in claim 5, characterized in that: Multiple hinge fixing plates (7) are installed on the inner side of the bow-shaped connecting plate (6); one connecting part of the hinge (11) is fastened to one of the hinge fixing plates (7).

7. The hinge structure between door panels as described in claim 6, characterized in that: The bow-shaped connecting plate (6) has a groove connecting part (8) on one or both sides corresponding to its protrusion; the inner panel and outer panel of the second door panel (2) are connected to the corresponding groove connecting part (8) by a bending structure; the hinge fixing plate (7) has a recessed structure at the position corresponding to the groove connecting part (8); the groove connecting part (8) of the bow-shaped connecting plate (6) is locked in the corresponding recessed structure of the hinge fixing plate (7); the opening size of the protrusion of the bow-shaped connecting plate (6) is limited by the hinge fixing plate (7).

8. The hinge structure between door panels as described in claim 7, characterized in that: The groove connection part (8) is provided with a weld or fastener (9) formed by welding; used to fasten the bow-shaped connecting plate (6) and the hinge fixing plate (7) to each other; or to fasten the bow-shaped connecting plate (6), the hinge fixing plate (7) and the inner and outer panels of the second door panel (2) to each other through the fastener (9).

9. The hinge structure between door panels as described in claim 8, characterized in that: A stop bar (10) is installed inside the groove connection part (8).

10. The hinge structure between door panels as described in claim 1, characterized in that: A hinge mounting box (12) is installed on the first door panel (1) at the position corresponding to the hinge (11).

11. The hinge structure between door panels as described in claim 1, characterized in that: A sealing strip (13) is installed in the groove (3); when the first door panel (1) and the second door panel (2) are closed, the boss (4) abuts against the sealing strip (13) to form a sealing structure.

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