A magnetic force reset-based sky-ground hinge

Abstract

A kind of heaven and earth hinge based on magnetic force reset, including fixed seat installed in cabinet body side, and movable seat installed in door body side, first connecting rod and second connecting rod are hingedly installed on the fixed seat, the other end of first connecting rod and second connecting rod is hingedly connected with movable seat, first connecting rod and second connecting rod swing relative to fixed seat and movable seat, realize the opening and closing of hinge, first magnet and second magnet are respectively installed on the opposite surface of fixed seat and movable seat, when hinge is closed to set angle, first magnet and second magnet attract each other, drive movable seat to move to the direction of fixed seat, realize the automatic closing of hinge.The beneficial effects of the utility model are: the utility model uses the mode that first magnet and second magnet attract each other to drive heaven and earth hinge to automatically close.Magnet is used as reset element, not involving material fatigue problem, its magnetic force can keep stable in long-term use, and it will not be like spring that repeatedly deforms and occurs spring force attenuation or breakage.

Description

Technical Field

[0001] This utility model relates to the field of hardware hinge technology, specifically a top and bottom hinge based on magnetic reset. Background Technology

[0002] Top and bottom hinges, as a common connecting component, are widely used in various furniture, doors, windows, cabinets, and other fields. Their unique structure enables them to provide a smooth and reliable opening and closing experience. To further enhance ease of use and functionality, modern top and bottom hinge designs often incorporate an automatic reset (or automatic closing) function, which means that after the door is opened to a certain angle and released, it can automatically drive the door back to the closed state.

[0003] Currently, one of the mainstream technical solutions for achieving the automatic reset function of hinges is through built-in or external mechanical springs. For example, Chinese Patent No. 202080028969.3, entitled "Hinge for Opening and Closing Hinged Doors of Furniture," and Chinese Patent No. 201680024653.0, entitled "A Deceleration Hinge for Furniture," both demonstrate that these hinges typically integrate torsion springs, compression springs, or tension springs internally. When the door is opened, the spring deforms under the applied force, thus storing mechanical potential energy; when the door closes to a set angle, the spring, relying on its own elastic restoring force, drives the door to move in the closing direction until it is fully closed.

[0004] However, this existing technology based on spring return has the following significant drawbacks: 1. Spring material fatigue leads to performance degradation and shortened lifespan: As an elastic element, the spring's working principle relies on the elastic deformation of the material to store and release energy. In the actual use of top and bottom hinges, the spring undergoes frequent cycles of stretching, compression, or torsion. Long-term, repeated deformation causes the spring material to gradually experience metal fatigue, resulting in a decrease in its elastic modulus. This means that as the usage time increases, the spring's restoring force will gradually weaken, becoming insufficient to effectively drive the door to close automatically, and may even fail completely or break. This irreversible performance degradation severely affects the automatic closing function of the top and bottom hinges, making it impossible for the door to close completely or resulting in a loose closure, thus significantly shortening the product's lifespan and increasing maintenance and replacement costs.

[0005] 2. Friction generates noise and accelerates component wear: During the automatic closing of the spring-driven hinge, the spring itself or its connecting components (such as guide posts, sleeves, and shafts) inevitably slide or rub against other structural parts inside the hinge as they recover their deformation. This mechanical friction generates continuous noise during operation, such as a "squeaking" friction sound or a "clicking" mechanical impact sound, which is more noticeable at night or in quiet environments, seriously affecting the user experience. Furthermore, long-term friction accelerates surface wear of related components, leading to increased clearances, further exacerbating the noise problem, and potentially causing malfunctions such as uneven operation and jamming, ultimately shortening the lifespan and reliability of the entire hinge. Therefore, further improvements are necessary. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a magnetically resetting hinge that is simple in structure, low in manufacturing cost, can still provide a stable and reliable automatic reset function without the action of a spring, and has a longer service life and a better user experience.

[0007] The purpose of this utility model is achieved in the following way: a magnetically reset hinge, which includes a fixed seat installed on the cabinet side and a movable seat installed on the door side. A first link and a second link are hinged on the fixed seat. The other end of the first link and the second link are hinged to the movable seat. The first link and the second link swing relative to the fixed seat and the movable seat to realize the opening and closing of the hinge. A first magnet and a second magnet are respectively installed on the opposite surfaces of the fixed seat and the movable seat. When the hinge is closed to a set angle, the first magnet and the second magnet attract each other, driving the movable seat to move towards the fixed seat, thereby realizing the automatic closing of the hinge.

[0008] Furthermore: a first mounting cavity is recessed inward on the end face of the fixed seat, and the first magnet is installed in the first mounting cavity; a second mounting cavity is recessed inward on the end face of the movable seat, and the second magnet is installed in the second mounting cavity.

[0009] Furthermore: the first mounting cavity is provided through the end face of the fixed seat, and the second mounting cavity is provided through the end face of the movable seat.

[0010] Furthermore, both the first magnet and the second magnet are permanent magnets.

[0011] Furthermore, a damping arm is provided at the rear end of the first connecting rod, and a damper is installed in the fixed seat. When the hinge is closed, the damping arm presses the damper to generate a closing buffer force.

[0012] Furthermore, the damping arm is provided with an arc-shaped sliding surface, which makes sliding contact with the damper.

[0013] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0014] 2. This invention uses the mutual attraction between a first magnet and a second magnet to drive the hinge to close automatically. As a reset element, the magnet does not involve material fatigue issues; its magnetic force remains stable over long-term use and will not weaken or break like a spring due to repeated deformation. This fundamentally solves the drawbacks of existing spring-reset hinges, such as functional failure and shortened lifespan due to spring fatigue, greatly improving product reliability and service life.

[0015] 3. This invention achieves automatic closing through non-contact attraction between magnets, eliminating the harsh noise generated by friction and collision between the spring and structural components during the traditional spring reset process. Throughout the hinge closing process, the combination of movement and stillness provides a smooth and quiet closing experience, making it particularly suitable for residential and office environments with high noise requirements, significantly improving product quality and user comfort.

[0016] 4. This utility model features a damping arm at the tail of the first link and a damper installed in the fixed seat. This allows the damping arm to press against the damper during the final stage of hinge closure, generating a closing buffer force. This design effectively avoids the violent impact that might result from the door closing rapidly under magnetic attraction, achieving a smooth and stable "soft closing" effect. It not only protects the door and cabinet from damage but also further reduces impact noise during closing, improving the overall usability.

[0017] 5. When the hinge opens to an angle greater than the magnetic attraction range, the hinge will no longer be dragged by the magnetic force, making its opening and closing smoother and allowing it to stop at any angle.

[0018] 6. No space needs to be reserved inside the mounting base to install the spring mechanism, which simplifies the internal structure and allows for a more compact size. Attached Figure Description

[0019] Figure 1 This is a rendering of the overall assembly of the utility model and the cabinet.

[0020] Figure 2 In this utility model Figure 1 Enlarged view of the structure of part A.

[0021] Figure 3 This is a rendering of the hinge of this utility model in the open state.

[0022] Figure 4 This is a rendering of the hinge of this utility model in the closed state.

[0023] Figure 5This is a schematic diagram of the structure of the hidden fixing seat cover in this utility model.

[0024] Figure 6 This is a structural assembly drawing of the present utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. A magnetically resetting hinge includes a fixed seat 2 installed on the cabinet side 1 and a movable seat 4 installed on the door side 3. A first connecting rod 5 and a second connecting rod 6 are hingedly installed on the fixed seat 2. The other ends of the first connecting rod 5 and the second connecting rod 6 are hinged to the movable seat 4. The first connecting rod 5 and the second connecting rod 6 swing relative to the fixed seat 2 and the movable seat 4 to realize the opening and closing of the hinge. A first magnet 7 and a second magnet 8 are respectively installed on the opposite surfaces of the fixed seat 2 and the movable seat 4. When the hinge is closed to a set angle, the first magnet 7 and the second magnet 8 attract each other, driving the movable seat 4 to move towards the fixed seat 2, thereby realizing the automatic closing of the hinge.

[0026] In this embodiment, the mechanical structure achieves conventional opening and closing movements through a fixed base 2, a movable base 4, and a first connecting rod 5 and a second connecting rod 6 connecting the two. When the door is opened or closed under external force, the two connecting rods swing relative to each other, thereby driving the movable base 4 to move under the guidance of the fixed base 2. Its core innovation lies in the introduction of a magnetic reset mechanism: a first magnet 7 and a second magnet 8 are respectively installed on the opposing surfaces of the fixed base 2 and the movable base 4. When the hinge, along with the door, swings to a preset specific angle during the closing process, the distance between the two magnets reaches the effective range of magnetic attraction, and the magnetic force begins to dominate. At this time, the mutual attraction between the magnets actively drives the movable base 4 to move towards the fixed base 2, so that when the door is nearly fully closed, it can automatically and smoothly close using this non-contact magnetic force.

[0027] Compared to existing technologies that rely on mechanical springs for reset, the magnet itself is not subject to material fatigue, and its magnetic force output remains highly stable over long-term use. This fundamentally eliminates the problems of functional failure and shortened lifespan caused by spring elasticity decay or breakage, significantly improving the reliability and durability of the product.

[0028] Furthermore, the attraction between the magnets is based on non-contact force, completely avoiding the harsh noise generated by friction or collision between traditional springs and internal mechanical parts during the reset process. This makes the door extremely quiet when closing automatically, providing users with an excellent silent experience, especially suitable for places sensitive to ambient noise.

[0029] In one embodiment: a first mounting cavity 21 is recessed inward on the end face of the fixed seat 2, and the first magnet 7 is installed in the first mounting cavity 21; a second mounting cavity 41 is recessed inward on the end face of the movable seat 4, and the second magnet 8 is installed in the second mounting cavity 41.

[0030] In this embodiment, the first magnet 7 is mounted in an inwardly recessed first mounting cavity 21 on the end face of the fixed base 2, while the second magnet 8 is mounted in an inwardly recessed second mounting cavity 41 on the end face of the movable base 4. This means that the magnets are not simply attached to the surface, but are embedded in specific grooves inside the component, thus fixing their position and protecting them.

[0031] The cavity provides a precise and constrained mounting position for the magnets. This ensures that the two magnets maintain optimal relative position and spacing during hinge opening and closing, thereby guaranteeing the stability of the magnetic attraction output and the consistency of the reset function, and avoiding performance degradation caused by magnet displacement.

[0032] Enhanced product aesthetics: The magnets are hidden inside the hinges, making the product appearance simpler and smoother, avoiding the visual abruptness that might be caused by exposed magnets, and improving the overall industrial design aesthetics and integration.

[0033] In one embodiment: the first mounting cavity 21 is disposed through the end face of the fixed seat 2, and the second mounting cavity 41 is disposed through the end face of the movable seat 4.

[0034] In one embodiment: both the first magnet 7 and the second magnet 8 are permanent magnets.

[0035] In this embodiment: a permanent magnet is a material that can maintain its magnetism and generate a magnetic field for a long time, and can function continuously without any external energy supply. When two permanent magnets approach each other, they will naturally generate an attractive force, providing a continuous resetting force.

[0036] Meanwhile, once the permanent magnet is magnetized, its magnetic force remains highly stable over a long period and will not weaken with time or increased usage. This ensures the long-term reliability of the magnetic reset function of the hinge, requiring virtually no daily maintenance and reducing the user's burden.

[0037] In one embodiment: a damping arm 51 is provided at the rear end of the first link 5, and a damper 9 is installed in the fixed seat 2. When the hinge is closed, the damping arm 51 presses the damper 9 to generate a closing buffer force.

[0038] In one embodiment: To provide a buffer when the door closes automatically, preventing the impact and noise caused by rapid door closure, this invention introduces a damping mechanism. A damping arm 51 extends rearward from the tail of the first link 5. Simultaneously, a damper 9 is installed inside the fixed base 2. When the door begins to close automatically under magnetic force, the first link 5 swings accordingly, and the damping arm 51 at its tail moves to a position contacting the damper 9, pressing it down. When pressed, the damper 9 generates a resistance opposite to the closing direction of the door through its internal hydraulic, pneumatic, or mechanical friction mechanism, i.e., a closing buffer force. This buffer force effectively slows down the door's speed at the end of the closing process, thus achieving a smooth closing effect.

[0039] In this embodiment, a gentle "soft closing" effect is achieved: the buffer mechanism avoids the violent impact that may be caused by the door closing rapidly under the action of magnetic force, providing a smooth, stable, and shock-free "soft closing" experience, which greatly improves the user's comfort and safety.

[0040] At the same time, it effectively absorbs the kinetic energy when the door closes, preventing damage to the door, door frame, and hinges due to strong impacts, and greatly extending the service life of the product and furniture.

[0041] In addition to the non-contact silence brought by magnetic reset, the buffer function also eliminates the impact sound at the moment of closing the door, making the entire closing process extremely quiet, making the product appear high-end and user-friendly in various environments.

[0042] In one embodiment: the damping arm 51 is provided with an arc-shaped sliding surface 52, which slides in contact with the damper 9.

[0043] In this embodiment: To optimize the interaction between the damping arm 51 and the damper 9, the damping arm 51 is provided with an arc-shaped sliding surface 52. When the damping arm 51 contacts and presses against the damper 9, this arc-shaped sliding surface 52 will contact and act on the damper 9 in a smooth and continuous sliding manner. This design ensures uniform force transmission and smooth motion, rather than simple point contact or linear contact.

[0044] The arc-shaped sliding surface provides a gradual and continuous contact area, making the damping force more stable and controllable from start to finish. This avoids any abruptness or jamming that may occur during the damping process, ensuring the linearity and smoothness of the buffering effect and improving the door closing feel.

[0045] In addition, the optimized sliding contact reduces local stress concentration and uneven friction between the damping arm and the damper, thereby significantly reducing component wear, helping to extend the service life of the damping mechanism, maintain its long-term performance stability, and reduce maintenance requirements.

[0046] At the same time, the smooth sliding contact can effectively reduce the noise generated by friction, making the entire buffering process quieter and further improving the overall quietness of the product and the comfort of the user experience.

[0047] In summary, this utility model provides a door hinge based on magnetic reset. Its core working principle is to use the stable non-contact magnetic attraction between permanent magnets to fundamentally replace the mechanical spring in traditional door hinges, which is prone to fatigue, generates noise, and has a limited lifespan, thereby realizing the automatic closing function of the door.

[0048] Specifically, this hinge achieves basic opening and closing actions through a fixed base 2, a movable base 4, and their connecting rods. Its innovation lies in the ingenious and protected mounting of the first magnet 7 and the second magnet 8 within inwardly recessed cavities on the opposing surfaces of the fixed base 2 and the movable base 4. This cavity design ensures precise alignment and reliable fixation of the magnets while optimizing the manufacturing process. When the door is closing, as the hinge swings to a set angle, the distance between the two permanent magnets reaches a critical range, generating sufficient magnetic attraction to actively drive the movable base 4 towards the fixed base 2, thus achieving automatic, silent closing of the door without the risk of spring fatigue.

[0049] At the same time, since there is no obstruction from the spring mechanism, there is no need to reserve space for installing springs and other components in the mounting base. Therefore, its size can be smaller, and the opening size can be smaller when installing the cabinet, thus avoiding affecting the strength of the cabinet.

[0050] It is important to note that when this hinge is opened to the set angle, the movement of the movable seat will no longer be affected by the spring force. Therefore, the movement of the movable seat can be smoother at this time, and it can stop at any angle. This also makes the hinge move freely within a certain range, and the opening and closing feel is more gentle.

[0051] To further enhance user experience and protect the product, this invention creatively incorporates a flexible buffer mechanism. In the final stage of door closing, the damping arm 51, extending from the first link 5, smoothly presses against the damper 9 installed in the fixed base 2 via its specially designed arc-shaped sliding surface 52. When pressed, the damper 9 generates a controllable closing buffer force, effectively reducing the speed and impact at the end of door closing, achieving a smooth and gentle "soft closing" effect. This buffer function not only further eliminates impact noise during closing but also significantly protects the door and hinges from damage, extending the overall product lifespan; therefore, it can be widely adopted.

[0052] In summary, this invention fundamentally solves the inherent shortcomings of traditional spring hinges in terms of fatigue, noise, and lifespan through a magnetic reset mechanism. Furthermore, through a sophisticated magnet mounting structure, the application of permanent magnets, and a highly efficient and gentle buffer system, it creates an innovative hinge solution that is highly reliable, ultra-quiet, long-lasting, smooth in operation, and requires no external power, bringing users an excellent user experience and significant value enhancement.

[0053] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0054] 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 claimed utility model.

Claims

1. A magnetically resetting hinge, comprising a fixed seat (2) mounted on the cabinet side and a movable seat (4) mounted on the door side, wherein a first connecting rod (5) and a second connecting rod (6) are hingedly mounted on the fixed seat (2), the other ends of the first connecting rod (5) and the second connecting rod (6) are hinged to the movable seat (4), and the first connecting rod (5) and the second connecting rod (6) swing relative to the fixed seat (2) and the movable seat (4) to realize the opening and closing of the hinge, characterized in that: The fixed seat (2) and the movable seat (4) are respectively equipped with a first magnet (7) and a second magnet (8). When the hinge is closed to a set angle, the first magnet (7) and the second magnet (8) attract each other and drive the movable seat (4) to move towards the fixed seat (2) to realize the automatic closing of the hinge.

2. A magnetically repositionable hinge according to claim 1, characterized in that: The fixed seat (2) has a first mounting cavity (21) recessed inward on its end face, and the first magnet (7) is installed in the first mounting cavity (21); the movable seat (4) has a second mounting cavity (41) recessed inward on its end face, and the second magnet (8) is installed in the second mounting cavity (41).

3. A magnetically repositionable hinge according to claim 2, characterized in that: The first mounting cavity (21) is provided through the end face of the fixed seat (2), and the second mounting cavity (41) is provided through the end face of the movable seat (4).

4. A magnetically repositionable hinge according to claim 1 or 2, characterized in that: Both the first magnet (7) and the second magnet (8) are permanent magnets.

5. A magnetically repositionable hinge according to claim 1, characterized in that: The first link (5) extends rearward to provide a damping arm (51), and a damper (9) is installed in the fixed seat (2). When the hinge is closed, the damping arm (51) presses the damper (9) to generate a door closing buffer force.

6. A magnetically repositionable hinge according to claim 5, characterized in that: The damping arm (51) is provided with an arc-extended sliding surface (52), which slides in contact with the damper (9).

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