A manual lift-up door hinge

Abstract

A manual upward-opening door hinge includes a base fixed to a cabinet body and a movable seat fixed to the cabinet door. The base and the movable seat are hinged together by a linkage mechanism. The movable seat moves relative to the base through the linkage mechanism, realizing the upward opening of the cabinet door. The linkage mechanism includes a first link and a second link hinged to the base, and a third link and a fourth link hinged to the movable seat. The middle part of the second link is hinged to the middle part of the third link, the other end of the second link is hinged to the fourth link, and the other end of the third link is hinged to the first link. A push arm is also hinged inside the base, and the other end of the push arm is hinged to the middle part of the first link through a fifth link. The beneficial effect of this utility model is that the hinge can obtain different damping forces when the cabinet door is closed to different stages. This segmented damping design allows the cabinet door to be controlled more precisely throughout the closing process.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, specifically a manual upward-opening door hinge. Background Technology

[0002] Flip-up doors are a common opening mechanism in modern furniture (such as cabinets, bookcases, and TV cabinets), widely used for their advantages such as not taking up lateral space when opening, and being aesthetically pleasing and practical. To ensure smooth opening and closing of the cabinet doors and provide necessary support and limiting functions, the hinge of a flip-up door is a key mechanical component.

[0003] Currently, there are many types of lift-up door hinges on the market. Their core function is to achieve the lifting and tilting of the cabinet door through a linkage mechanism. They also typically integrate functions such as door opening assistance, door closing buffer, and opening limit. However, existing lift-up door hinges still have some common shortcomings and technical bottlenecks, mainly reflected in the following aspects:

[0004] 1. Inadequate door closing damping and easily damaged dampers: Existing upward-opening door hinges typically incorporate damping mechanisms during the closing process to slow the door's descent and prevent impact and noise during rapid closure. However, many existing damping devices, especially hydraulic or pneumatic dampers, are prone to damping attenuation, oil leaks, and seal failure after prolonged use, leading to decreased damping effectiveness or even complete failure and shortening the product's lifespan. Furthermore, some damping devices have flawed structural designs, resulting in excessive impact forces on the damper during door closing, which can easily damage its internal structure and further reduce product reliability. Users often complain about harsh door closures, excessive noise, and the need for frequent damper replacements, increasing maintenance costs.

[0005] 2. Large impact at maximum opening angle, cabinet door prone to shaking: To prevent damage from excessive opening, upward-opening door hinges typically have opening limit devices to ensure the door stops stably at its maximum opening angle. However, existing limit devices, such as simple mechanical limit blocks or elastic buffers, often generate significant impact when the door is opened to its maximum angle and contacts the limit device. This impact can not only cause wear on the limit components themselves but also easily lead to violent shaking or even rebounding of the entire cabinet door at its maximum opening, resulting in an unstable user experience. In some cases, violent shaking can also damage the cabinet structure or cause items to fall, posing a safety hazard.

[0006] 3. Inconvenient or Unstable Adjustment of Door Opening Assist: Some lift-up door hinges are designed with a door opening assist mechanism to reduce the force required for users to open the cabinet door. However, the existing adjustment methods for the assist mechanism may not be convenient enough, or the adjustment range may be limited, making it difficult to adapt to cabinet doors of different weights or the personalized needs of users. In some cases, the assist effect of the mechanism decreases after a period of use, resulting in a significant amount of force still being required to open the cabinet door. Therefore, further improvements are necessary. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a manual up-opening door hinge that is more compact in structure, has lower production costs, longer service life, better product stability, and a better user experience.

[0008] The purpose of this utility model is achieved through the following means: a manual upward-opening door hinge, which includes a base fixed on the cabinet body and a movable seat fixed on the cabinet door. The base and the movable seat are hinged together by a linkage mechanism. The movable seat moves relative to the base through the linkage mechanism to realize the upward opening of the cabinet door. The linkage mechanism includes a first link and a second link hinged on the base, and a third link and a fourth link hinged on the movable seat.

[0009] The middle part of the second link is hinged to the middle part of the third link, the other end of the second link is hinged to the fourth link, and the other end of the third link is hinged to the first link.

[0010] The base is also hinged to a thrust arm, the other end of which is hinged to the middle of the first link via a fifth link; the thrust arm is also connected to an elastic adjustment mechanism, which pushes the first link toward the cabinet door via the thrust arm and the fifth link to generate door opening assistance.

[0011] The base is also equipped with a door damping device that interacts with the third link to generate a buffering effect when the door is closed.

[0012] Furthermore: the door closing damping device includes a sliding seat fixed in the base, a guide hole is provided in the sliding seat, the damping seat is slidably installed in the guide hole, and a buffer is provided between the sliding seat and the damping seat to slow down the speed at which the damping seat retracts inward.

[0013] Furthermore: a contact seat is provided on the damping seat, and the third connecting rod is pressed on the contact seat to push the damping seat to move.

[0014] Furthermore, the door closing damping device also includes a guide seat installed in the base, a reverse push block is slidably installed in the guide seat, and a reverse push damper is provided between the reverse push block and the guide seat. When the hinge is closed to a set angle, the fifth link pushes the reverse push block to compress the reverse push damper to generate a door closing buffer force.

[0015] Furthermore, the third link protrudes towards the fifth link with a limit arm, and correspondingly, the fifth link is provided with a limit seat. When the hinge is opened to a set angle, the limit arm and the limit seat are hooked together to limit the maximum opening angle of the hinge.

[0016] Furthermore, the limiting arm is provided with a hook groove, and the hook in the hook groove is attached to the limiting seat.

[0017] Furthermore, the limiting arm is covered with a plastic cap, which contacts the door closing damping device and pushes it to move.

[0018] Furthermore, the elastic adjustment mechanism includes a spring rod with one end hinged to the base, and the other end of the spring rod is located in the adjustment groove inside the thrust arm via a sliding mounting seat. An adjustment device is provided between the thrust arm and the sliding seat to adjust the position of the sliding seat in the adjustment groove.

[0019] Furthermore, the force adjustment device is a rotating adjusting bolt mounted on the thrust arm. The adjusting bolt is screwed to an adjusting nut mounted on the sliding seat. Rotating the adjusting bolt drives the sliding seat to move relative to the thrust arm.

[0020] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0021] As the cabinet door closes to different stages, the hinges achieve varying levels of damping force through the contact between the closing damping device and the third link, as well as the pushing action with the fifth link. This segmented damping design allows for more precise control of the cabinet door throughout the closing process, avoiding the problems of excessive speed or impact in the later stages of closing that might occur with a single damping method. This significantly improves the smoothness and gentleness of the cabinet door closing.

[0022] Because the damping effect is distributed to different links and points of application, the instantaneous impact force borne by the damping device is greatly reduced, effectively avoiding premature damage to the damper caused by high-load impact, thereby significantly extending the service life of the damper and the overall reliability of the hinge.

[0023] 4. When the cabinet door is opened to its maximum angle and contacts the limiting component, the impact force borne by the limiting arm can be effectively dispersed and reduced due to its long lever arm. This "long lever arm buffer" design significantly reduces the instantaneous impact force borne by the limiting component, thereby effectively avoiding wear and damage to components caused by excessive impact in traditional limiting devices. It also greatly reduces the violent shaking and rebound phenomenon that occurs when the cabinet door reaches its maximum opening, improving the user's sense of safety and comfort.

[0024] 5. By adjusting the displacement of the sliding seat relative to the thrust arm through the adjusting bolt, the position or preload of the elastic element is changed, achieving precise adjustment of the door opening assist. This function allows the hinge to easily adapt to cabinet doors of different weights and meet users' personalized needs for opening force, further enhancing the product's practicality and user experience. Attached Figure Description

[0025] Figure 1 This is a diagram showing the final assembly and usage effect of this utility model.

[0026] Figure 2-5 This is a schematic diagram of the hinge closing process of this utility model.

[0027] Figure 6 This is a schematic diagram of the elastic adjustment mechanism in this utility model.

[0028] Explanation of reference numerals in the attached diagram: First link - 1; Second link - 2; Third link - 3; Limiting arm - 31; Hook slot - 32; Plastic cap - 33; Fourth link - 4; Fifth link - 5; Limiting seat - 51; Thrust arm - 6; Adjusting groove - 61; Adjusting bolt - 62; Adjusting nut - 63; Base - 7; Sliding seat - 71; Spring seat - 710; Guide hole - 72; Damping seat - 73; Buffer - 74; Contact seat - 75; Guide seat - 76; Reverse push block - 77; Reverse thrust damper - 78; Spring rod - 79; Movable seat - 8; Elastic adjustment mechanism - 9. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings. A manual upward-opening door hinge includes a base 7 fixed on the cabinet body and a movable seat 8 fixed on the cabinet door. The base 7 and the movable seat 8 are hinged together by a linkage mechanism. The movable seat 8 moves relative to the base 7 through the linkage mechanism to realize the upward opening of the cabinet door. The linkage mechanism includes a first link 1 and a second link 2 hinged to the base 7, and a third link 3 and a fourth link 4 hinged to the movable seat 8.

[0030] The middle part of the second link 2 is hinged to the middle part of the third link 3, the other end of the second link 2 is hinged to the fourth link 4, and the other end of the third link 3 is hinged to the first link 1.

[0031] The base 7 is also hinged to a thrust arm 6, and the other end of the thrust arm 6 is hinged to the middle of the first link 1 through the fifth link 5; the thrust arm 6 is also connected to the elastic adjustment mechanism 9, and the elastic adjustment mechanism 9 pushes the first link 1 to swing towards the cabinet door through the thrust arm 6 and the fifth link 5 to generate door opening assistance.

[0032] The base 7 is also equipped with a door damping device that interacts with the third link 3 to generate a buffer effect when the door is closed.

[0033] In this embodiment, when the cabinet door needs to be opened, it is manually flipped upwards, causing the movable seat 8 fixed on the door to move the third link 3 and the fourth link 4. Simultaneously, the first link 1 and the second link 2 in the linkage mechanism, as key hubs connecting the base 7 and the movable seat 8, cooperate with the base, the movable seat, and the third link 3 and the fourth link 4 through their respective hinge points to convert the rotational motion of the cabinet door into an upward flipping motion.

[0034] The linkage connection method of "the middle part of the second link 2 is hinged to the middle part of the third link 3, the other end of the second link 2 is hinged to the fourth link 4, and the other end of the third link 3 is hinged to the first link 1" forms a multi-link composite mechanism, which ensures the smoothness of the movement trajectory of the cabinet door during opening and closing.

[0035] Regarding door opening assistance: The push arm 6, hinged within the base 7, is connected to the middle of the first link 1 via the fifth link 5. The elastic adjustment mechanism 9 is connected to the push arm 6, providing a thrust in the direction of door opening—that is, door opening assistance—through the action of the push arm 6 and the fifth link 5. When the cabinet door is closed, the elastic adjustment mechanism is compressed and stores energy; when the cabinet door is opened, the stored elastic potential energy is released, assisting the cabinet door to flip upwards, thereby reducing the force required for the user to open the cabinet door and making operation easier and less strenuous.

[0036] Regarding door closing cushioning: The door closing damping device installed inside the base 7 interacts with the third link 3. When the cabinet door closes downwards from the open state, the third link 3 moves with the movable seat 8 and comes into contact with or connects to the door closing damping device. This damping device provides a reverse resistance, slowing down the downward speed of the cabinet door and preventing the cabinet door from falling rapidly and causing impact and noise, thereby achieving a smooth and quiet door closing effect.

[0037] Compared to traditional technologies, this design achieves a smooth upward opening of the cabinet door through a sophisticated linkage mechanism. The introduced flexible adjustment mechanism provides opening assistance, significantly enhancing the user experience. More importantly, the pre-set closing damping device lays the foundation for excellent subsequent cushioning, making it superior in basic functionality to traditional hinges without assistance or cushioning.

[0038] In one embodiment: the door closing damping device includes a sliding seat 71 fixed in the base 7, a guide hole 72 is provided in the sliding seat 71, a damping seat 73 is slidably installed in the guide hole 72, and a buffer 74 is provided between the sliding seat 71 and the damping seat 73 to slow down the speed at which the damping seat 73 retracts inward.

[0039] In this embodiment, when the cabinet door is closed, the door drives the movable seat 8 and its linkage mechanism to move, wherein the third linkage 3 interacts with the damping device. Specifically, the third linkage 3 pushes the damping seat 73 to slide inward within the guide hole 72 of the sliding seat 71. Since a buffer 74 is provided between the sliding seat 71 and the damping seat 73, such as hydraulic damping, pneumatic damping, or friction damping, the buffer 74 generates resistance, slowing down the inward retraction speed of the damping seat 73. This deceleration process directly acts on the third linkage 3, thereby indirectly slowing down the closing speed of the cabinet door and providing a buffering effect.

[0040] In one embodiment, the damping seat 73 is provided with a contact seat 75, and the third link 3 presses against the contact seat 75 to push the damping seat 73 to move. When the cabinet door is closed, a specific part of the third link 3 will contact and press against this contact seat 75. Through this pressure-driven method, the third link 3 transfers the kinetic energy of the cabinet door closing to the damping seat 73, causing it to overcome the resistance of the buffer 74 and slide, thereby achieving buffer control of the cabinet door closing process.

[0041] The designed contact seat 75 provides a clear and stable force point, ensuring effective interaction between the third link 3 and the damping seat 73, and avoiding wear or inaccurate action that might result from direct contact. This design helps extend the service life of the damping mechanism and ensures the stability and consistency of the cushioning effect.

[0042] In one embodiment, the door closing damping device further includes a guide seat 76 disposed in the base 7, a reverse push block 77 is slidably installed in the guide seat 76, and a reverse push damper 78 is disposed between the reverse push block 77 and the guide seat 76. When the hinge is closed to a set angle, the fifth link 5 pushes the reverse push block 77 to compress the reverse push damper 78 to generate a door closing buffer force.

[0043] During the cabinet door closing process, when the hinges are about to be fully closed and reach a preset "set angle," the fifth linkage 5, which was originally responsible for assisting in opening the door, will act in the opposite direction, pushing the reverse push block 77 located in the guide seat 76 within the base 7. When the reverse push block 77 is pushed, it compresses the reverse thrust damper 78 between itself and the guide seat 76. This reverse thrust damper 78 generates additional damping force, further slowing down the speed of the cabinet door in the final stage of closing.

[0044] In this embodiment, by triggering different damping components using the third and fifth links at different stages of cabinet door closing, precise segmented control of the cabinet door closing process is achieved. This segmented damping provides a smoother closing experience: as the cabinet door is about to close completely, it provides additional cushioning, effectively eliminating the "bang" impact sound and making the cabinet door closing process more gentle and smooth.

[0045] In addition, by distributing the total damping task to different points of application and dampers, this design avoids individual dampers bearing excessive loads throughout the entire closing stroke, especially the high impact at the closing end, thereby significantly improving the durability and reliability of the entire damping system.

[0046] In one embodiment, a limiting arm 31 is provided protruding from the third link 3 toward the fifth link 5. Correspondingly, a limiting seat 51 is provided on the fifth link 5. When the hinge is opened to a set angle, the limiting arm 31 is hooked with the limiting seat 51 to limit the maximum opening angle of the hinge.

[0047] When the user opens the cabinet door upwards, the door moves the movable seat 8, which in turn drives the third link 3 and the fifth link 5 in the linkage mechanism to move relative to each other. The limiting arm 31 protruding on the third link 3 and the limiting seat 51 on the fifth link 5 gradually approach each other during the opening of the cabinet door. When the cabinet door reaches the preset maximum opening angle, the limiting arm 31 and the limiting seat 51 precisely "hook" together, that is, they contact and engage with each other, forming a mechanical limiting point to prevent the cabinet door from opening further upwards.

[0048] In this embodiment, the limiting arm 31 and the limiting seat 51 are hooked together to achieve the limiting position. This design utilizes the relative positional relationship of the linkage mechanism at a specific angle. More importantly, this limiting method can take advantage of the long lever arm to effectively disperse the impact force.

[0049] In one embodiment, the limiting arm 31 is provided with a hook groove 32, and the hook groove 32 hooks onto the limiting seat 51.

[0050] In this embodiment, the end of the limiting arm 31 is designed with a hook groove 32 of a specific shape. When the cabinet door is opened to its maximum angle, the limiting seat 51 precisely engages or hooks into the hook groove 32 on the limiting arm 31. This cooperation between the groove and the seat forms a more stable and reliable limiting structure, preventing the cabinet door from rebounding or shaking excessively due to inertia or external force at the maximum opening angle.

[0051] The use of a hook groove 32 in conjunction with a limit seat 51 provides a stronger mechanical locking effect compared to a simple planar contact limiter, allowing the cabinet door to stop more stably at its maximum opening angle and reducing wobbling. At the same time, this hook design also helps to distribute pressure under stress, further extending the lifespan of the limiter components.

[0052] In one embodiment, the limiting arm 31 is covered with a plastic cap 33, which contacts the door closing damping device and pushes it to move.

[0053] In this embodiment, the limiting arm 31 is covered with a plastic cap 33. During a specific phase of the cabinet door closing, this plastic cap 33 comes into contact with the door closing damping device. As a buffer, the plastic cap 33 effectively reduces noise and wear caused by direct contact between the limiting arm 31 and the damping device, improving product durability and user experience.

[0054] In one embodiment: the elastic adjustment mechanism includes a spring rod 79 with one end hinged to the base 7, and the other end of the spring rod 79 is located in the adjustment groove 61 in the thrust arm 6 via a sliding mounting seat 710. An adjustment device is provided between the thrust arm 6 and the sliding seat 71 to adjust the position of the sliding seat 71 in the adjustment groove 61.

[0055] In this embodiment, the elastic adjustment mechanism provides elastic force through a spring rod 79. One end of the spring rod 79 is hinged to the base 7, and the other end is slidably mounted in the adjustment groove 61 within the thrust arm 6 via a spring seat 710. When the cabinet door is closed, the movement of the thrust arm 6 compresses the spring rod 79, storing elastic potential energy. When the cabinet door is opened, the spring rod 79 releases energy, pushing the first connecting rod 1 through the thrust arm 6 and the fifth connecting rod 5, generating door opening assistance.

[0056] Regarding the adjustment of the door opening assist: A force adjustment device is provided between the thrust arm 6 and the spring seat 710. This force adjustment device can adjust the position of the spring seat 710 within the adjustment groove 61. By changing the position of the spring seat 710, the effective working length or pre-compression of the spring rod 79 can be adjusted, thereby changing the magnitude of the elastic force and realizing the adjustment of the door opening assist.

[0057] This adjustment mechanism allows the hinge to flexibly adapt to cabinet doors of varying weights, meeting the personalized opening force needs of different users. Users can easily adjust the amount of force applied according to actual usage, greatly improving the product's versatility and user convenience. Furthermore, by adjusting the amount of force applied, it can be balanced with the weight of the cabinet door, allowing the door to hover within a specific angle, thus facilitating user operation.

[0058] In one embodiment: the force adjustment device is an adjusting bolt 62 that is rotatably mounted on the thrust arm 6. The adjusting bolt 62 is screwed to the adjusting nut 63 mounted on the sliding seat 71. Rotating the adjusting bolt 62 drives the sliding seat 71 to move relative to the thrust arm 6.

[0059] In this embodiment, the force adjustment device employs a threaded transmission mechanism. An adjusting bolt 62 is rotatably mounted on the thrust arm 6, and this adjusting bolt 62 is threadedly connected to an adjusting nut 63 mounted on the spring seat 710. When the user rotates the adjusting bolt 62, due to the helical action of the thread, the adjusting nut 63 moves linearly, thereby driving the spring seat 710 to displace relative to the thrust arm 6 within the adjusting groove 61. This, in turn, adjusts the compression or point of action of the spring rod 79, achieving precise adjustment of the door opening assist. This bolt-nut force adjustment device is a simple-to-operate, precise-adjusting, and reliable-locking mechanical structure. It can provide stepless or fine-tuned assist adjustment, and once adjusted, the self-locking property of the thread maintains the adjusted state, avoiding assist drift caused by vibration and other factors during use, further enhancing product stability and user experience.

[0060] In summary, the core working principle of this utility model is to achieve a smooth upward movement of the cabinet door through a multi-link mechanism, and integrates opening assistance, segmented closing damping and long lever arm limiting functions, aiming to provide a more stable, gentler and more durable upward door user experience.

[0061] Among them, the door opening assistance and adjustment: When the cabinet door starts to open from the closed state, the elastic adjustment mechanism 9 releases its stored elastic potential energy through the push arm 6 and the fifth connecting rod 5, pushing the first connecting rod 1 to swing in the direction of cabinet door opening, providing door opening assistance to the user. This assistance can be precisely adjusted by the force adjustment device composed of the adjusting bolt 62 and the adjusting nut 63 to adjust the position of the spring rod 79, thereby adapting to different cabinet door weights and user needs, making the door opening process labor-saving and personalized.

[0062] 2. Multi-link motion trajectory control: The movement of the entire hinge is achieved by a complex linkage mechanism consisting of the base 7, the movable seat 8, and the first link 1, the second link 2, the third link 3, and the fourth link 4. During the opening and closing of the cabinet door, these links move in coordination to ensure a smooth and stable trajectory from closing to fully opening or closing, avoiding jamming or sudden acceleration.

[0063] Segmented door closing damping: In the first stage of damping, the third link 3 interacts with the contact seat 75 of the door closing damping device located in the base 7, pushing the damping seat 73 to slide in the guide hole 72, generating the first stage of damping force through the buffer 74, and slowing down the initial speed of the cabinet door falling.

[0064] Second-stage damping: When the cabinet door closes to the preset "set angle," the fifth link 5 pushes another closing damping component, namely the reverse push block 77, which compresses the reverse push damper 78, generating additional damping force. Furthermore, the plastic cap 33 covering the limit arm 31 may also contact the closing damping device at specific closing angles, further assisting or triggering the damping effect. This segmented, multi-point coordinated damping design makes the cabinet door closing process smoother and quieter, effectively avoiding the impact and noise commonly seen at the closing end of traditional hinges, while also distributing the load on the damper and significantly extending its service life.

[0065] Long lever arm limiting reduces impact: When the cabinet door is opened to its maximum angle, the protruding limiting arm 31 on the third link 3 precisely engages with the limiting seat 51 on the fifth link 5. Stable locking is typically achieved through the cooperation of the hook groove 32 and the limiting seat 51. This design cleverly utilizes the lever arm principle. Because the limiting arm 31 provides a relatively long lever arm when under force, it effectively disperses the impact force when the door is opened, significantly reducing wear on the limiting components and the violent shaking of the cabinet door at its maximum opening, thus improving the product's stability and durability.

[0066] In summary, this utility model not only provides a fully functional manual lift-up door hinge, but also achieves significant technological advancements in user experience, product stability, and component lifespan through innovative segmented damping and long lever arm limiting designs.

[0067] 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 manual up-and-over door hinge, comprising a fixed base (7) fixed to a cabinet and a movable base (8) fixed to a cabinet door, the fixed base (7) and the movable base (8) being hingedly connected by a linkage mechanism, the movable base (8) being movable relative to the fixed base (7) by the linkage mechanism to effect up-and-over opening of the cabinet door, characterised in that: The linkage mechanism includes a first link (1) and a second link (2) hinged on the base (7), and a third link (3) and a fourth link (4) hinged on the movable seat (8). The middle part of the second link (2) is hinged to the middle part of the third link (3), the other end of the second link (2) is hinged to the fourth link (4), and the other end of the third link (3) is hinged to the first link (1). The base (7) is also hinged to a thrust arm (6), and the other end of the thrust arm (6) is hinged to the middle of the first link (1) through the fifth link (5); the thrust arm (6) is also connected to an elastic adjustment mechanism, which pushes the first link (1) to swing toward the cabinet door through the thrust arm (6) and the fifth link (5) to generate door opening assistance; The base (7) is also equipped with a door damping device that interacts with the third link (3) to generate a buffer effect when the door is closed.

2. A manual up and over door hinge according to claim 1, wherein: The door closing damping device includes a sliding seat (71) fixed in the base (7), a guide hole (72) is provided in the sliding seat (71), a damping seat (73) is slidably installed in the guide hole (72), and a buffer (74) is provided between the sliding seat (71) and the damping seat (73) to slow down the speed at which the damping seat (73) retracts inward.

3. A manual up and over door hinge according to claim 2, wherein: The damping seat (73) is provided with a contact seat (75), and the third link (3) is pressed on the contact seat (75) to push the damping seat (73) to move.

4. A manually operated upward-opening door hinge according to claim 1, characterized in that: The door closing damping device also includes a guide seat (76) set in the base (7), a reverse push block (77) is slidably installed in the guide seat (76), and a reverse push damper (78) is set between the reverse push block (77) and the guide seat (76). When the hinge is closed to the set angle, the fifth link (5) pushes the reverse push block (77) to compress the reverse push damper (78) to generate a door closing buffer force.

5. A manual up and over door hinge according to claim 1, wherein: The third link (3) is provided with a limit arm (31) protruding towards the fifth link (5). Correspondingly, the fifth link (5) is provided with a limit seat (51). When the hinge is opened to a set angle, the limit arm (31) hooks with the limit seat (51) to limit the maximum opening angle of the hinge.

6. A manual up and over door hinge according to claim 5, wherein: The limiting arm (31) is provided with a hook groove (32), and the hook groove (32) hooks onto the limiting seat (51).

7. A manual up and over door hinge according to claim 6, wherein: The limiting arm (31) is covered with a plastic cap (33), which contacts the door closing damping device and pushes it to move.

8. A manual up and over door hinge according to claim 1, wherein: The elastic adjustment mechanism includes a spring rod (79) with one end hinged to the base (7), and the other end of the spring rod (79) is located in the adjustment groove (61) in the thrust arm (6) via a sliding mounting seat (710). A force adjustment device is provided between the thrust arm (6) and the sliding seat (71) to adjust the position of the sliding seat (71) in the adjustment groove (61).

9. A manual up and over door hinge according to claim 8, wherein: The force adjustment device is a rotating adjusting bolt (62) mounted on the thrust arm (6). The adjusting bolt (62) is screwed to the adjusting nut (63) mounted on the sliding seat (71). Rotating the adjusting bolt (62) drives the sliding seat (71) to move relative to the thrust arm (6).

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