A metal door turn-over hinge device
By designing a support and positioning structure for the metal door flip hinge device, the problems of vibration, noise, and inconvenient locking of existing hinge devices have been solved, realizing door buffering, automatic closing, and multi-angle locking, thereby improving user experience and device lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI MEISHENGLONG METAL TECHNOLOGY CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
Existing hinge devices cause strong vibrations and noise when the door panel hits the door frame. Long-term impact can easily cause door frame deformation, hinge loosening, and wear on the edge of the door panel. They cannot achieve flexible automatic closing or maintain a half-open angle. Moreover, the locking structure is simple and inconvenient for users to operate, especially in ventilated or temporarily fixed scenarios.
Design a metal door flip hinge device with a support and positioning structure, including a fixed sleeve, a spring buffer tube, a torsion spring, a telescopic rod, positioning holes, and a positioning insert. The spring buffer tube and the torsion spring work together to achieve the door's buffering and automatic closing functions, and the insertion of the positioning insert into different positioning holes allows the door to be locked at any angle.
It effectively absorbs the impact force when the door is opened and closed, reduces noise, extends service life, and provides automatic closing or half-open support functions to enhance safety and convenience. Users can easily switch the locking mode to suit different scenario needs.
Smart Images
Figure CN224532494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hinges, and in particular to a metal door flip hinge device. Background Technology
[0002] Metal door swivel hinges are mechanical devices installed on metal doors and door frames to install metal doors and allow relative rotation between the metal door and the door frame. They are used in various types of metal doors.
[0003] When using existing hinge devices, conventional hinges rely on the door's own weight or a simple pin structure to close, resulting in strong vibrations and noise when the door panel hits the door frame. Long-term impact can easily cause door frame deformation, hinge loosening, and wear on the door panel edges, shortening the equipment's lifespan. At the same time, most hinges cannot achieve flexible automatic closing or maintain a half-open angle. In passageway door scenarios, the door often swings freely due to wind or tilting, requiring the additional installation of floor springs or door stops for positioning, increasing installation costs and detracting from the aesthetics. Furthermore, existing locking structures only support fully open or fully closed states and cannot flexibly lock at intermediate angles such as 45° or 90°. Especially in scenarios requiring ventilation or temporary fixation, users need to repeatedly operate the door, resulting in insufficient convenience and security. Utility Model Content
[0004] The main purpose of this utility model is to provide a metal door rotating hinge device, which can effectively solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A metal door rotating hinge device includes a first mounting plate and a second mounting plate. The second mounting plate is located on one side of the first mounting plate. A hinge axis is movably mounted at the connection between the first mounting plate and the second mounting plate. A support and positioning structure is fixedly mounted on the upper end of the first mounting plate. A limiting mounting plate is integrally formed at the front end of the first mounting plate. A limiting rod is movably mounted on the upper end of the limiting mounting plate. A positioning block is fixedly mounted on the upper end of the second mounting plate.
[0007] As a further embodiment of this utility model, the first mounting plate and the second mounting plate are provided with multiple screw holes inside, and the lower end of the hinge axis is threaded with a pivot screw, and the first mounting plate and the second mounting plate rotate around the hinge axis.
[0008] As a further embodiment of this utility model, the support positioning structure includes a fixed sleeve, a spring buffer tube, a torsion spring, a telescopic rod, positioning holes, a rod holder, and a positioning rod. The fixed sleeve is fixedly installed on the upper end of the first mounting plate. The spring buffer tube is movably installed inside the fixed sleeve. The torsion spring is fixedly installed inside the fixed sleeve and sleeved on the lower outer side of the spring buffer tube. The telescopic rod is movably installed on the upper end of the spring buffer tube. Multiple positioning holes are opened inside the telescopic rod. The rod holder is integrally formed on the upper end of the spring buffer tube and located on the outer side of the telescopic rod. The positioning rod is movably installed on the outer side of the rod holder.
[0009] As a further embodiment of this utility model, the torsion spring drives the spring buffer tube to rotate around the fixed sleeve through its own elasticity, and the upper end of the telescopic rod is inserted into the spring buffer tube.
[0010] As a further embodiment of this utility model, the lower end of the telescopic rod rests on the upper end of the second mounting plate and is inserted into the positioning block. When the telescopic rod moves downward, it is located on one side of the limiting rod.
[0011] As a further embodiment of this utility model, the positioning rod passes through the rod holder, and the end of the positioning rod is inserted into the positioning hole inside the telescopic rod.
[0012] Compared with the prior art, this utility model has the following beneficial effects: Through the set support and positioning structure, when the door panel rotates around the hinge axis, the telescopic rod is inserted into the spring buffer tube, and the internal spring contraction is used to achieve buffering, effectively absorbing the impact force when the door is opened and closed, reducing noise, and extending the service life of the door and hinge. The cooperation of the torsion spring and the telescopic rod provides automatic closing or half-open support function. When the door is closed, the lower end of the telescopic rod is pressed against the upper end of the second mounting plate and inserted into the positioning block to achieve elastic closing. When the door needs to be half-open, the device can maintain stability by adjusting the position of the telescopic rod. At the same time, when the telescopic rod moves to the bottom, it is located on the side of the limit rod, which makes it convenient for users to quickly switch the function mode, avoid the door from being accidentally closed or opened, and enhance safety.
[0013] The device is designed with positioning holes and positioning rods. Users can insert the positioning rods into different positioning holes inside the telescopic rod to lock the door. This allows the metal door to be fixed at any angle, which is suitable for different scenario needs. It is also easy to operate. Simply pull out or insert the positioning rod to unlock or unlock it. No additional tools are required, which improves the user experience. Attached Figure Description
[0014] Figure 1 This is an overall structural diagram of a metal door rotating hinge device according to the present invention;
[0015] Figure 2 This is a structural diagram of the telescopic rod rotating to the bottom in a metal door flip hinge device of this utility model;
[0016] Figure 3 This is an enlarged view of the support and positioning structure in a metal door hinge device according to this utility model.
[0017] In the diagram: 1. First mounting plate; 2. Second mounting plate; 3. Screw hole; 4. Hinge axis; 5. Axis screw; 6. Support and positioning structure; 7. Fixing sleeve; 8. Spring buffer tube; 9. Torsion spring; 10. Telescopic rod; 11. Positioning hole; 12. Insert rod seat; 13. Positioning insert rod; 14. Limiting mounting plate; 15. Limiting insert rod; 16. Positioning block. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0019] like Figures 1-3 As shown, a metal door rotating hinge device is described; please refer to it carefully. Figures 1-3 It includes a first mounting plate 1 and a second mounting plate 2. The second mounting plate 2 is located on one side of the first mounting plate 1. A hinge axis 4 is movably installed at the connection between the first mounting plate 1 and the second mounting plate 2. A support and positioning structure 6 is fixedly installed at the upper end of the first mounting plate 1. A limit mounting plate 14 is integrally formed at the front end of the first mounting plate 1. A limit rod 15 is movably installed at the upper end of the limit mounting plate 14. A positioning block 16 is fixedly installed at the upper end of the second mounting plate 2.
[0020] Please refer to this carefully. Figure 1 and Figure 2 The first mounting plate 1 and the second mounting plate 2 have multiple screw holes 3 inside. The lower end of the hinge axis 4 is threaded with a pivot screw 5. The first mounting plate 1 and the second mounting plate 2 rotate around the hinge axis 4.
[0021] Specifically, the first mounting plate 1 and the second mounting plate 2 are respectively installed on the door frame and the door panel through screw holes 3. The metal door can be flipped by rotating the first mounting plate 1 and the second mounting plate 2 around the hinge axis 4.
[0022] Please refer to this carefully. Figure 2 and Figure 3The supporting positioning structure 6 includes a fixed sleeve 7, a spring buffer tube 8, a torsion spring 9, a telescopic rod 10, a positioning hole 11, a rod seat 12, and a positioning rod 13. The fixed sleeve 7 is fixedly installed on the upper end of the first mounting plate 1. The spring buffer tube 8 is movably installed inside the fixed sleeve 7. The torsion spring 9 is fixedly installed inside the fixed sleeve 7 and sleeved on the lower outer side of the spring buffer tube 8. The telescopic rod 10 is movably installed on the upper end of the spring buffer tube 8. Multiple positioning holes 11 are opened inside the telescopic rod 10. The rod seat 12 is integrally formed on the upper end of the spring buffer tube 8 and located on the outer side of the telescopic rod 10. The positioning rod 13 is movably installed on the outer side of the rod seat 12.
[0023] Please refer to this carefully. Figure 3 The torsion spring 9 drives the spring buffer tube 8 to rotate around the fixed sleeve 7 through its own elasticity, and the upper end of the telescopic rod 10 is inserted into the spring buffer tube 8.
[0024] Specifically, when the first mounting plate 1 and the second mounting plate 2 rotate, the telescopic rod 10 is simultaneously inserted into the spring buffer tube 8. The telescopic rod 10 pushes the spring in the spring buffer tube 8 to contract, thereby achieving rotational buffering between the first mounting plate 1 and the second mounting plate 2, which buffers the opening and closing of the metal door and provides elastic closing support.
[0025] Please refer to this carefully. Figure 1 and Figure 2 The lower end of the telescopic rod 10 rests against the upper end of the second mounting plate 2 and is inserted into the positioning block 16. When the telescopic rod 10 moves downward, it is located on one side of the limiting rod 15.
[0026] Specifically, when the telescopic rod 10 and spring buffer tube 8 are not needed for telescopic buffering, the spring buffer tube 8 is rotated so that the telescopic rod 10 moves downward and is limited by the limiting rod 15. When the telescopic rod 10 and spring buffer tube 8 are needed again, the limiting rod 15 is pulled backward to contact the limiting of the telescopic rod 10. Then, the spring buffer tube 8 is rotated to one side by the elasticity of the torsion spring 9, so that the telescopic rod 10 is once again pressed against the upper end of the second mounting plate 2.
[0027] Please refer to this carefully. Figure 3 The positioning rod 13 passes through the rod seat 12, and the end of the positioning rod 13 is inserted into the positioning hole 11 inside the telescopic rod 10.
[0028] Specifically, when it is necessary to lock the metal door, the positioning rod 13 is inserted through the rod seat 12 and simultaneously into the positioning hole 11 inside the telescopic rod 10, which can position the telescopic rod 10 and the spring buffer tube 8, thereby locking the first mounting plate 1 and the second mounting plate 2 and realizing the locking of the metal door. The positioning rod 13 can also be inserted into different positioning holes 11 inside the telescopic rod 10 according to the locking angle.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A metal door rotating hinge device, comprising a first mounting plate (1) and a second mounting plate (2), wherein the second mounting plate (2) is located on one side of the first mounting plate (1), characterized in that: A hinge shaft (4) is movably installed at the connection between the first mounting plate (1) and the second mounting plate (2). A support positioning structure (6) is fixedly installed at the upper end of the first mounting plate (1). A limit mounting plate (14) is integrally formed at the front end of the first mounting plate (1). A limit rod (15) is movably installed at the upper end of the limit mounting plate (14). A positioning block (16) is fixedly installed at the upper end of the second mounting plate (2).
2. The metal door rotating hinge device according to claim 1, characterized in that: The first mounting plate (1) and the second mounting plate (2) have multiple screw holes (3) inside. The lower end of the hinge axis (4) is threaded with a pivot screw (5). The first mounting plate (1) and the second mounting plate (2) rotate around the hinge axis (4).
3. The metal door rotating hinge device according to claim 1, characterized in that: The supporting positioning structure (6) includes a fixed sleeve (7), a spring buffer tube (8), a torsion spring (9), a telescopic rod (10), a positioning hole (11), a rod seat (12), and a positioning rod (13). The fixed sleeve (7) is fixedly installed on the upper end of the first mounting plate (1). The spring buffer tube (8) is movably installed on the inner side of the fixed sleeve (7). The torsion spring (9) is fixedly installed on the inner side of the fixed sleeve (7) and sleeved on the lower outer side of the spring buffer tube (8). The telescopic rod (10) is movably installed on the upper end of the spring buffer tube (8). Multiple positioning holes (11) are opened in the telescopic rod (10). The rod seat (12) is integrally formed on the upper end of the spring buffer tube (8) and located on the outer side of the telescopic rod (10). The positioning rod (13) is movably installed on the outer side of the rod seat (12).
4. A metal door rotating hinge device according to claim 3, characterized in that: The torsion spring (9) drives the spring buffer tube (8) to rotate around the fixed sleeve (7) through its own elasticity, and the upper end of the telescopic rod (10) is inserted into the spring buffer tube (8).
5. A metal door rotating hinge device according to claim 3, characterized in that: The lower end of the telescopic rod (10) rests against the upper end of the second mounting plate (2) and is inserted into the positioning block (16). When the telescopic rod (10) moves to the lower position, it is located on one side of the limiting rod (15).
6. A metal door rotating hinge device according to claim 3, characterized in that: The positioning rod (13) passes through the rod seat (12), and the end of the positioning rod (13) is inserted into the positioning hole (11) inside the telescopic rod (10).