A concealed door hinge structure

Abstract

The application relates to a concealed door hinge structure and belongs to the technical field of building decoration engineering, which comprises a concealed door connecting plate, a bottom plate, a supporting plate, a positioning plate and a stretching mechanism; one side of the concealed door connecting plate is used for fixed connection with a concealed door, and the stretching mechanism is located between the concealed door connecting plate and the bottom plate and is used for adjusting the distance between the bottom plate and the concealed door connecting plate; one end of the positioning plate is fixedly connected with one end of the supporting plate and both form an L shape, one end of the supporting plate away from the positioning plate is rotationally connected with one end of the bottom plate, and one end of the positioning plate away from the supporting plate is rotationally connected with a wall body at a mounting position of the concealed door; the distance from the rotationally connected position of the positioning plate and the wall body to the outer wall of the wall body is the length of the positioning plate, the application can realize the 180-degree opening angle of the concealed door, can ensure that the concealed door is hidden and can improve the aesthetic effect.

Description

Technical Field

[0001] This application relates to the technical field of architectural decoration engineering, and in particular to a concealed door hinge structure. Background Technology

[0002] In the current decoration of public buildings, in order to achieve a balance between functionality and aesthetics, concealed electrical distribution boxes, fire hydrant boxes, and other facilities are often installed through hidden doors.

[0003] Traditional concealed doors use hidden hinges for installation. These hinges need to be embedded in the door frame to ensure the door is flush with the surrounding walls, thus achieving a concealed effect.

[0004] In actual use, the concealed hinge installation method has the drawback of limiting the opening angle of the hidden door. The actual opening angle is less than 130°, and can even only reach 90°. Utility Model Content

[0005] In order to achieve a 180° opening angle for the concealed door while ensuring that the concealed door is hidden and thus improving its aesthetics, this application provides a concealed door hinge structure.

[0006] The concealed door hinge structure provided in this application adopts the following technical solution:

[0007] A concealed door hinge structure includes a concealed door connecting plate, a base plate, a support plate, a positioning plate, and a tensioning mechanism. One side of the concealed door connecting plate is fixedly connected to the concealed door. The tensioning mechanism, located between the concealed door connecting plate and the base plate, adjusts the distance between the base plate and the concealed door connecting plate. One end of the positioning plate is fixedly connected to one end of the support plate, forming an L-shape. The end of the support plate away from the positioning plate is rotatably connected to one end of the base plate. The end of the positioning plate away from the support plate is rotatably connected to the wall at the concealed door installation location. The distance from the rotatable connection point of the positioning plate to the outer wall of the wall is the length of the positioning plate. In the closed state of the concealed door: the support plate is parallel to the concealed door, and the side of the base plate away from the tensioning mechanism abuts against the support plate. In the fully open state of the concealed door: the positioning plate and the support plate conform to the corner shape of the wall at the concealed door installation location and are flush against the wall. The base plate rotates to be coplanar with the support plate and abuts against the outer wall of the wall.

[0008] By adopting the above technical solution, the distance between the connecting plate and the bottom plate of the concealed door is adjusted by the tensioning mechanism. With the rotational connection of the positioning plate, the support plate and the wall, the concealed door remains flat and hidden when closed. When opened, the positioning plate and the support plate can be close to the corner of the wall, and the bottom plate rotates to be coplanar with the support plate and abuts against the outer wall. This breaks through the angle limitation of traditional concealed hinges and realizes 180° opening of the concealed door, which not only meets the functional requirements, but also significantly improves the overall aesthetics of the building through the concealed design.

[0009] Optionally, the positioning plate includes an inner plate, an outer plate, and an adjusting bolt. One end of the inner plate is inserted into the outer plate and is slidably disposed relative to the outer plate. The adjusting bolt passes through the outer plate and is threadedly connected to the inner plate.

[0010] By adopting the above technical solution, the sliding distance of the inner panel within the outer panel can be controlled by adjusting bolts according to different wall corner dimensions, and the length of the positioning plate can be flexibly adjusted to adapt to various installation scenarios, thereby enhancing the versatility and ease of installation of the concealed door hinge structure and ensuring that the concealed door can achieve 180° opening and flat concealment under different wall conditions.

[0011] Optionally, the inner plate is rotatably connected to a structural connecting plate at the end away from the outer plate, the structural connecting plate is fixedly connected to the wall, and the outer plate is fixedly connected to a support plate at the end away from the inner plate.

[0012] By adopting the above technical solution, the setting of the structural connecting plate indirectly expands the contact area between the positioning plate and the wall, making the force transmission more stable and reliable. This ensures that during the opening and closing of the hidden door, the positioning plate can stably support and guide the rotation of the support plate and the base plate, further improving the stability and durability of the structure when the hidden door is opened 180°.

[0013] Optionally, the stretching mechanism is a scissor lift mechanism.

[0014] By adopting the above technical solution, the scissor lift mechanism is a mechanical structure that achieves vertical lifting by the hinged expansion and contraction of cross links (scissor arms). It is named for its resemblance to crossed scissors and is widely used in industry, construction, logistics, and other fields. With its stable support characteristics and flexible telescopic function, the scissor lift mechanism can precisely adjust the distance between the concealed door connecting plate and the base plate during the opening and closing of concealed doors, providing stable support for the concealed door. Its compact structural design facilitates concealed installation in limited spaces without affecting the overall aesthetics.

[0015] Optionally, the tensioning mechanism includes an inner tube, an outer tube, a spring, and a positioning bolt. One end of the inner tube is fixedly connected to the connecting plate of the concealed door, and the other end is inserted into the outer tube and slides in the direction close to or away from the outer tube. An elongated hole is opened on the inner tube, and multiple positioning holes are opened on the outer tube. Adjacent positioning holes are spaced apart along the sliding direction of the inner tube. The positioning bolt passes through the corresponding positioning hole and is inserted into the elongated hole. The positioning bolt is threadedly connected to the outer tube. The spring is used to push the inner tube away from the outer tube. The end of the outer tube away from the inner tube is fixedly connected to the base plate.

[0016] By adopting the above technical solution, the elastic force of the spring can push the inner tube away from the outer tube, providing auxiliary thrust for opening the concealed door and reducing opening resistance; multiple positioning holes and elongated holes, together with positioning bolts, can realize the fixation of the inner tube in multiple positions inside the outer tube, meet the adjustment of the extension range and support force of the tensioning mechanism under different concealed door weights or installation requirements, and enhance the applicability and flexibility of the concealed door hinge structure.

[0017] Optionally, the spring is located inside the outer tube.

[0018] By adopting the above technical solution, the spring is hidden inside the outer tube. On the one hand, the spring can be effectively protected from external impacts, dust and other influences, thus extending the service life of the spring. On the other hand, the overall structure of the tensioning mechanism is more compact and aesthetically pleasing, which meets the needs of the concealed door design and avoids the spring being exposed, thus affecting the overall visual effect of the concealed door.

[0019] Optionally, a buffer pad is fixed on the inner tube, and the buffer pad is located between the wall of the elongated hole and the positioning bolt.

[0020] By adopting the above technical solution, the buffer pad is located between the wall of the elongated hole and the positioning bolt. During the opening and closing of the concealed door, it can effectively buffer the collision and friction between the positioning bolt and the inner tube, reduce noise generation, reduce the wear of components, improve the stability and service life of the tensioning mechanism, and enhance the comfort and reliability of the concealed door.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. Multi-component collaboration enables 180° concealed opening: Through the linkage design of the tensioning mechanism, positioning plate, support plate and base plate, the traditional hinge angle limitation is broken, so that the concealed door is flush against the wall after being fully opened. This not only meets the maintenance needs of facilities such as electrical boxes and fire hydrant boxes, but also maintains the overall aesthetics of the building wall through the concealed design and improves the space utilization rate.

[0023] 2. Modular adjustment enhances adaptability: The positioning plate uses a combination of inner and outer plates and adjusting bolts, which can flexibly adjust the length according to different wall corner sizes; the tensioning mechanism, through the cooperation of multiple positioning holes and elongated holes, realizes the adjustment of the extension range and support force, significantly enhancing the adaptability of the hinge structure to diverse installation scenarios and reducing construction difficulty and cost;

[0024] 3. Detailed optimization ensures long-term stable operation: The built-in spring protection design extends service life, the buffer pad effectively reduces component wear and operating noise, and the structural connecting plate expands the stress area to ensure the stability of the concealed door during frequent opening and closing, reducing maintenance frequency and improving user experience and safety. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the structure of Embodiment 1 of this application;

[0026] Figure 2 This is a schematic diagram of the hidden door in the closed state in Embodiment 1;

[0027] Figure 3 This is a schematic diagram of the initial open state of the hidden door in Embodiment 1;

[0028] Figure 4 This is a schematic diagram of the hidden door being further opened in Embodiment 1;

[0029] Figure 5 This is a schematic diagram of the hidden door being fully open in Embodiment 1;

[0030] Figure 6 This is a structural schematic diagram of Embodiment 2;

[0031] Figure 7 This is an exploded view of a portion of the structure at the tensioning mechanism in Example 2.

[0032] In the diagram, 1. Structural connecting plate; 2. Positioning plate; 21. Inner plate; 22. Outer plate; 23. Adjusting bolt; 3. Support plate; 4. Base plate; 5. Tensioning mechanism; 51. Inner tube; 511. Long hole; 52. Outer tube; 521. Positioning hole; 53. Spring; 54. Positioning bolt; 6. Concealed door connecting plate; 7. Buffer pad. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0034] This application discloses a concealed door hinge structure.

[0035] Example 1: Reference Figure 1 and Figure 2 A concealed door hinge structure includes a concealed door connecting plate 6, a base plate 4, a support plate 3, a positioning plate 2, and a tensioning mechanism 5. The concealed door connecting plate 6 has a rectangular plate structure, and one side is fixedly connected to the back of the concealed door by countersunk screws to ensure a stable connection without affecting the flatness of the front of the concealed door. Welding, gluing, or other methods can also be used.

[0036] refer to Figure 1 and Figure 2The positioning plate 2 adopts an adjustable structure, including an inner plate 21, an outer plate 22, and an adjusting bolt 23. The outer plate 22 is a hollow rectangular tube. One end of the inner plate 21 is inserted into the outer plate 22 and slidably guided by a dovetail groove structure. The adjusting bolt 23 passes through a threaded hole in the side wall of the outer plate 22 and is threadedly connected to the inner plate 21. The end of the inner plate 21 away from the outer plate 22 is rotatably connected to the structural connecting plate 1, which is fixed to the wall by expansion bolts. The end of the outer plate 22 away from the inner plate 21 is welded and perpendicularly fixed to the support plate 3, forming an L-shaped stable structure. The end of the support plate 3 away from the outer plate 22 is rotatably connected to the bottom plate 4. The tensioning mechanism 5 is located between the bottom plate 4 and the concealed door connecting plate 6.

[0037] refer to Figures 2 to 5 When the hidden door is closed, the support plate 3 is parallel to the side of the hidden door, the bottom plate 4 is in close contact with the support plate 3 on the side away from the tensioning mechanism 5, the positioning plate 2 is in contact with the side wall of the structural connecting plate 1 away from the wall, and the outer surface of the hidden door is flush with the outer wall of the wall.

[0038] refer to Figures 2 to 5 When the hidden door is opened to 180°, the positioning plate 2 rotates relative to the structural connecting plate 1 until the positioning plate 2 and the support plate 3 are in contact with the corner of the wall. The bottom plate 4 rotates to be coplanar with the support plate 3 and abuts against the outer wall of the wall to ensure that the hidden door is stably fixed.

[0039] refer to Figure 1 and Figure 2 The tensioning mechanism 5 adopts a scissor-type lifting mechanism, which consists of multiple sets of cross-hinged high-strength metal connecting rods made of Q345 steel. These rods are hinged together via pins to form an "X"-shaped stacked structure and are installed between the base plate 4 and the concealed door connecting plate 6. During the opening and closing of the concealed door, the scissor arm extends and retracts via hydraulic drive or an electric push rod, precisely adjusting the distance between the concealed door connecting plate 6 and the base plate 4 to provide stable support for the concealed door. Its compact structure facilitates concealed installation. The hydraulic drive or electric push rod is not shown in the diagram; the installation of the scissor-type lifting mechanism is based on existing technology.

[0040] Example 2: The difference from Example 1 is that: Figure 6 and Figure 7As shown, the tensioning mechanism 5 includes an inner tube 51, an outer tube 52, a spring 53, and a positioning bolt 54. One end of the inner tube 51 is welded to the connecting plate 6 of the concealed door, and the other end is inserted into the outer tube 52. The side wall of the inner tube 51 has an elongated hole 511 extending axially, and the side wall of the outer tube 52 has a number of positioning holes 521 spaced 10mm apart. The spring 53 is completely housed inside the outer tube 52, with one end abutting against the bottom surface of the outer tube 52 and the other end pushing against the end of the inner tube 51, keeping the inner tube 51 extending outward. During installation, according to the weight of the concealed door and the required support force, the positioning bolt 54 is screwed into the elongated hole 511 after passing through the corresponding positioning hole 521. Tightening the positioning bolt 54 limits the relative position of the inner tube 51 and the outer tube 52. A rubber buffer pad 7 is fixed to the inner tube 51 near the hole wall of the positioning bolt 54 with strong adhesive to effectively buffer the impact during opening and closing.

[0041] The implementation principle of the concealed door hinge structure in this application embodiment is as follows: During the opening of the concealed door, the tensioning mechanism 5 extends and retracts according to preset parameters or manual adjustment, pushing the concealed door outward and providing support force; the concealed door can also be equipped with a self-opening device, which provides an outward pushing force when the concealed door opens. The positioning plate 2 and the support plate 3 rotate around the structural connecting plate 1 as a fulcrum, guiding the concealed door to unfold along the corner of the wall until the bottom plate 4 is completely in contact with the wall surface, achieving a 180° opening.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concealed door hinge structure, characterized in that: The system includes a concealed door connecting plate (6), a base plate (4), a support plate (3), a positioning plate (2), and a tensioning mechanism (5). One side of the concealed door connecting plate (6) is fixedly connected to the concealed door. The tensioning mechanism (5) is located between the concealed door connecting plate (6) and the base plate (4) to adjust the distance between the base plate (4) and the concealed door connecting plate (6). One end of the positioning plate (2) is fixedly connected to one end of the support plate (3), forming an L-shape. The end of the support plate (3) furthest from the positioning plate (2) is rotatably connected to one end of the base plate (4). The end of the positioning plate (2) furthest from the positioning plate (2) is rotatably connected to one end of the base plate (4). One end of the support plate (3) is used to rotate and connect with the wall at the installation location of the hidden door; the distance from the rotating connection point of the positioning plate (2) to the outer wall of the wall is the length of the positioning plate (2); when the hidden door is closed: the support plate (3) is set parallel to the hidden door, and the bottom plate (4) abuts against the support plate (3) on the side away from the tensioning mechanism (5); when the hidden door is fully open: the positioning plate (2) and the support plate (3) conform to the corner shape of the wall at the installation location of the hidden door and are close to the wall, and the bottom plate (4) rotates to be coplanar with the support plate (3) and abuts against the outer wall of the wall.

2. The concealed door hinge structure according to claim 1, characterized in that: The positioning plate (2) includes an inner plate (21), an outer plate (22) and an adjusting bolt (23). One end of the inner plate (21) is inserted into the outer plate (22) and is slidably disposed relative to the outer plate (22). The adjusting bolt (23) passes through the outer plate (22) and is threadedly connected to the inner plate (21).

3. The concealed door hinge structure according to claim 2, characterized in that: The inner plate (21) is rotatably connected to a structural connecting plate (1) at the end away from the outer plate (22). The structural connecting plate (1) is fixedly connected to the wall. The outer plate (22) is fixedly connected to a support plate (3) at the end away from the inner plate (21).

4. The concealed door hinge structure according to claim 1, characterized in that: The stretching mechanism (5) is a scissor lift mechanism.

5. The concealed door hinge structure according to claim 1, characterized in that: The tensioning mechanism (5) includes an inner tube (51), an outer tube (52), a spring (53), and a positioning bolt (54). One end of the inner tube (51) is fixedly connected to the hidden door connecting plate (6), and the other end is inserted into the outer tube (52) and slides in the direction close to or away from the outer tube (52). The inner tube (51) has an elongated hole (511), and the outer tube (52) has multiple positioning holes (521). Adjacent positioning holes (521) are spaced apart along the sliding direction of the inner tube (51). The positioning bolt (54) passes through the corresponding positioning hole (521) and is inserted into the elongated hole (511). The positioning bolt (54) is threadedly connected to the outer tube (52). The spring (53) is used to push the inner tube (51) away from the outer tube (52). The end of the outer tube (52) away from the inner tube (51) is fixedly connected to the base plate (4).

6. The concealed door hinge structure according to claim 5, characterized in that: The spring (53) is located inside the outer tube (52).

7. The concealed door hinge structure according to claim 5, characterized in that: A buffer pad (7) is fixed on the inner tube (51), and the buffer pad (7) is located between the hole wall of the elongated hole (511) and the positioning bolt (54).

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