Door plate with hidden hinges
By using a concealed hinge design and combining recessed and protruding interfaces, the aesthetic and sealing issues of traditional garage doors or high-speed doors are solved, achieving concealed connection of door panel profiles and improved sealing, thus extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN DELXIN TECH CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-15
AI Technical Summary
The exposed hinges of traditional garage doors or high-speed doors affect the appearance and are prone to deformation due to external impacts or long-term use, reducing their service life. They also easily accumulate dust and rainwater, affecting sealing and smooth operation.
The concealed hinge design utilizes the interlocking of recessed and convex interfaces, combined with shielding components and reinforcing ribs, to achieve a hidden connection of the door panel profiles and improve sealing and strength.
It improves the sealing and aesthetics of the door panel profile, prevents dust and rainwater from entering, extends service life, and ensures smooth operation of the door panel.
Smart Images

Figure CN224244709U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door panels, and in particular to a door panel with a concealed hinge. Background Technology
[0002] In applications such as garage doors and industrial high-speed doors, the door panels are opened and closed frequently, and there are high requirements for sealing, durability, and aesthetics. Traditional garage doors or high-speed doors typically use exposed hinges to connect the door panels to achieve folding or lifting movements.
[0003] However, exposed hinges not only look less neat, especially in commercial or high-end residential garages, affecting the overall aesthetics, but also make the metal hinges susceptible to deformation due to external impacts or long-term use, affecting the smooth operation of the door panel. In addition, rainwater and dust can easily seep into the door panel, and long-term accumulation may lead to door panel corrosion or jamming, reducing its service life. Utility Model Content
[0004] The purpose of this utility model is to provide a door panel with a concealed hinge to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a door panel with a concealed hinge, comprising:
[0006] Door panel profiles;
[0007] A connecting structure is provided, which is connected to both ends of the door panel profile and is snapped into the inside of the door panel profile to conceal the connecting structure.
[0008] A rotating shaft that rotatably inserts between adjacent connecting structures.
[0009] Preferably, the door panel profile includes:
[0010] The profile body has a frame structure;
[0011] The shielding component and the protruding interface are both connected to one end of the profile body;
[0012] The second limiting block and the concave interface are both connected to the other end of the profile body. The second limiting block and the blocking component are on the same straight line. The concave interface and the convex interface are on the same straight line, and the concave interface and the convex interface are in a concave-convex fit.
[0013] Preferably, the door panel profile further includes:
[0014] A reinforcing rib is installed on the inner side of the profile body and is used to provide shaping support for the profile body.
[0015] Screw fixing parts are symmetrically installed on the inner side of the profile body.
[0016] Preferably, the concave interface has an interface groove on the side facing the convex interface, and the concave interface has a deformation groove inside, which is connected to the interface groove.
[0017] Preferably, the shading component includes:
[0018] The first limiting block is connected to the profile body;
[0019] A waterproof baffle is connected to a first limiting block, and the waterproof baffle is arranged in an arc shape.
[0020] Preferably, the connection structure includes:
[0021] The snap-fit part is snapped into the door panel profile.
[0022] An arc-shaped support arm, one end of which is connected to a snap-fit part;
[0023] The rotating part is connected to the other end of the arc-shaped support arm, and the rotating part is movably engaged with the rotating shaft. The gap between the snap-fit part, the arc-shaped support arm and the rotating part is an arc-shaped groove.
[0024] Preferably, the interior of the rotating part has multiple oil passage holes arranged in a ring array.
[0025] The technical effects and advantages of this utility model are as follows:
[0026] This utility model utilizes a combination of door panel profiles and connecting structures. By inserting the connecting structure between the shielding component and the protruding interface, the installation of the connecting structure is facilitated. This does not affect the normal rotation between the two door panel profiles, while also concealing the connecting structure at the hinge point between the door panel profiles. Furthermore, when the two door panel profiles are on the same straight line, the interlocking between the concave and convex interfaces improves the sealing at the direct closure point of the door panel profiles, thereby enhancing the waterproof function. After the door panel profiles are closed, the hinges are not visible, resulting in a more aesthetically pleasing appearance. Attached Figure Description
[0027] Figure 1 This is a top view of the overall structure of this utility model.
[0028] Figure 2 This is a top view of the door panel profile of this utility model.
[0029] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.
[0030] Figure 4 This is a top view of the connection structure of this utility model.
[0031] Figure 5 This is a top view of the concave interface of this utility model.
[0032] In the diagram: 1. Door panel profile; 11. Profile body; 12. Shelter assembly; 121. First limiting block; 122. Waterproof baffle; 13. Second limiting block; 14. Recessed interface; 141. Interface groove; 142. Deformation groove; 15. Protruding interface; 16. Reinforcing rib; 17. Screw fixing part; 2. Connecting structure; 21. Snap-fit part; 22. Arc-shaped support arm; 23. Rotating part; 231. Oil passage hole; 201. Arc-shaped groove; 3. Rotating shaft. Detailed Implementation
[0033] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] This utility model provides, for example Figure 1-5 The door panel shown includes: a door panel profile 1; a connecting structure 2, which is connected to both ends of the door panel profile 1 and is snapped into the inner side of the door panel profile 1 to conceal the connecting structure 2; and a pivot 3, which is rotatably inserted between adjacent connecting structures 2. By snapping the connecting structure 2 into the shielding component 12 and the protruding interface 15, the installation of the connecting structure 2 is facilitated. This does not affect the normal rotation between the two door panel profiles 1, and it also conceals the connecting structure 2 at the hinge between the door panel profiles 1. When the two door panel profiles 1 are on the same straight line, their waterproof function is improved. After the door panel profiles 1 are closed, the hinge is not visible, making it more aesthetically pleasing. Example
[0035] The door panel profile 1 includes: a profile body 11, which has a frame structure; a shielding component 12 and a protruding interface 15, both of which are connected to one end of the profile body 11; a second limiting block 13 and a concave interface 14, both of which are connected to the other end of the profile body 11. The second limiting block 13 and the shielding component 12 are on the same straight line, and the concave interface 14 and the protruding interface 15 are on the same straight line, with the concave interface 14 and the protruding interface 15 having a concave-convex fit. The door panel profile 1 also includes: a reinforcing rib 16, which is installed on the inner side of the profile body 11 and serves to provide structural support for the profile body 11; and screw fixing parts 17, which are symmetrically installed on the inner side of the profile body 11. Two locking positions are formed between the shielding component 12 and the protruding interface 15, and between the second limiting block 13 and the recessed interface 14, so that the connecting structure 2 can be installed at both ends of the door panel profile 1. The shielding component 12 facilitates the wrapping of the connecting structure 2, allowing for connection with the second limiting block 14. 3. A fit is formed to reduce the gap at the hinge between the door panel profiles 1. The concave-convex fit between the concave interface 14 and the convex interface 15 facilitates the improvement of the sealing performance at the direct closing point of the door panel profiles 1, thereby improving the sealing performance at the connection between the door panel profiles 1. The reinforcing rib 16 supports the inside of the profile body 11, thereby facilitating the improvement of the strength of the profile body 11. The screw fixing part 17 is a circle with an added notch. The screw fixing part 17 is used to fix self-tapping screws. After adding the notch, it can be used for various types of screws, and the fault tolerance is better.
[0036] The concave interface 14 has an interface groove 141 on the side facing the convex interface 15. The concave interface 14 has a deformation groove 142 inside, which is connected to the interface groove 141. The interface groove 141 allows the protruding part of the convex interface 15 to be engaged inside it. The interlocking between the concave interface 14 and the convex interface 15 increases the sealing performance of the door panel profile 1 after closure, preventing the entry of a large amount of dust or liquid. The deformation groove 142 is T-shaped, and the concave interface 14 is made of elastic material. When the convex interface 15 and the concave interface 14 are engaged, if the impact is too great, the deformation groove 142 provides deformation space for the two sides of the concave interface 14, thereby facilitating the buffering and deflection of the impact on the convex interface 15.
[0037] Furthermore, the shielding component 12 includes: a first limiting block 121, which is connected to the profile body 11; and a waterproof baffle 122, which is connected to the first limiting block 121 and is arc-shaped. The arc shape of the waterproof baffle 122 facilitates the formation of a protective cover that matches the shape of the rotating part 23, thus protecting the connecting structure 2. The first limiting block 121 facilitates the limiting of the connecting structure 2. Example
[0038] Based on Embodiment 1, the connecting structure 2 includes: a snap-fit part 21, which snaps into the door panel profile 1; an arc-shaped support arm 22, one end of which is connected to the snap-fit part 21; and a rotating part 23, which is connected to the other end of the arc-shaped support arm 22 and is movably fitted with the rotating shaft 3. The gap between the snap-fit part 21, the arc-shaped support arm 22, and the rotating part 23 is an arc-shaped groove 201. The arc-shaped groove 201 facilitates the insertion of the waterproof baffle 122. The insertion provides space so that the waterproof baffle 122 can protect the connecting structure 2 without affecting the normal rotation of the door panel profile 1. The shielding component 12 can be easily snapped into the snap-fit positions at both ends of the door panel profile 1 to realize the installation of the relative position between the door panel profile 1 and the connecting structure 2. The arc-shaped setting of the arc-shaped support arm 22 facilitates the arc-shaped support of the rotating part 23. The rotational connection between the rotating part 23 and the rotating shaft 3 facilitates the hinge between the door panel profiles 1.
[0039] The rotating part 23 has multiple oil passage holes 231 arranged in a ring array inside, which facilitates the guidance of lubricating oil.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A door panel with concealed hinges, characterized in that, include: Door panel profile (1); The connecting structure (2) is connected to both ends of the door panel profile (1) and is snapped into the inner side of the door panel profile (1) for concealing the connecting structure (2); A rotating shaft (3) is rotatably inserted between adjacent connecting structures (2).
2. A door panel with concealed hinges according to claim 1, characterized in that, The door panel profile (1) includes: The profile body (11) has a frame structure; A shielding component (12) and a protruding interface (15) are connected to one end of the profile body (11); The second limiting block (13) and the concave interface (14) are both connected to the other end of the profile body (11). The second limiting block (13) and the shielding component (12) are on the same straight line. The concave interface (14) and the convex interface (15) are on the same straight line, and the concave interface (14) and the convex interface (15) are in a concave-convex fit.
3. A door panel with concealed hinges according to claim 2, characterized in that, The door panel profile (1) also includes: A reinforcing rib (16) is installed on the inner side of the profile body (11) and is used to provide shaping support for the profile body (11). Screw fixing part (17) is symmetrically installed on the inner side of the profile body (11).
4. A door panel with concealed hinges according to claim 2, characterized in that, The concave interface (14) has an interface groove (141) on the side facing the convex interface (15), and a deformation groove (142) is provided inside the concave interface (14), which is connected to the interface groove (141).
5. A door panel with concealed hinges according to claim 2, characterized in that, The shielding component (12) includes: The first limiting block (121) is connected to the profile body (11); A waterproof baffle (122) is connected to a first limiting block (121), and the waterproof baffle (122) is arranged in an arc shape.
6. A door panel with concealed hinges according to claim 1, characterized in that, The connection structure (2) includes: The snap-fit part (21) is snapped into the door panel profile (1); An arc-shaped support arm (22) is provided, one end of which is connected to a snap-fit part (21). Rotating part (23) is connected to the other end of the arc-shaped support arm (22), and the rotating part (23) is movably engaged with the rotating shaft (3). The gap between the snap-fit part (21), the arc-shaped support arm (22) and the rotating part (23) is an arc-shaped groove (201).
7. A door panel with concealed hinges according to claim 6, characterized in that, The rotating part (23) has multiple oil passage holes (231) arranged in a ring array inside.