Lifting door hinge with door locking force

Abstract

A lifting door hinge with door locking force comprises a main body and a trigger, a first swing arm and a second swing arm are installed on the main body in a hinged mode, the other end of the first swing arm and the other end of the second swing arm are hinged to the trigger, and the first swing arm and the second swing arm swing relative to the main body and the trigger to achieve opening and closing of the hinge. A containing cavity is further formed in the main body, a pull arm is installed in the containing cavity, the front end of the pull arm is hinged to the second swing arm, the rear end of the pull arm is connected with the main body through a tension spring, and the tension spring generates tension to always pull the trigger to move in the closing direction through the pull arm and the second swing arm. The beneficial effects of the utility model are that according to the hinge design, the accommodation cavity is arranged in the main body and a specific swing arm structure is adopted, so that the motion path of the box door is effectively controlled. Through accurate hinging and structural design, redundant gaps between the box door and the box body are reduced, so that the box door can be tightly attached to the box body after being closed.

Description

Technical Field

[0001] The utility model relates to a hardware accessory, in particular to a lifting door hinge with door locking force. Background Art

[0002] Door hinges, as a crucial mechanical connection component, are widely used in a variety of cabinets, such as refrigerators, freezers, ovens, storage cabinets, precision instruments, and high-end furniture. Their primary function is to reliably connect the door to the cabinet, enabling smooth opening and closing, effectively sealing and opening the interior of the equipment. A well-designed door hinge ensures stable door opening and closing, while also enhancing the overall appearance and user experience.

[0003] However, existing traditional door hinge designs generally use a simple hinged structure, which achieves the door's swinging opening by rotating the hinge shaft. Although this design meets basic opening and closing requirements to a certain extent, it has gradually exposed some significant defects and shortcomings in use. Especially in the context of the market's increasing demand for equipment with refined appearance, ease of use, and reliability, these defects have affected the overall user experience, as follows:

[0004] 1. To ensure smooth door movement when opening, traditional hinge designs typically leave a certain amount of free space between the door bottom and the cabinet body. While this design effectively prevents interference with the door opening process, this space inevitably creates a large gap between the door bottom and the cabinet body when the door is closed. This gap problem is particularly evident in applications with high-end home appliances, precision instruments, and high-end furniture, which require a high level of aesthetics. The loose connection between the cabinet body and the door creates a visual impression of unrefined and loose structure, reducing the overall appearance of the product. This visual defect is particularly noticeable and fails to meet the user's expectations for high-end products in terms of detail and sophistication, which in turn has a negative impact on the market competitiveness of the equipment.

[0005] 2. To improve the tightness between the door and the cabinet, designers sometimes try to reduce the gap between the bottom of the door and the cabinet. However, this improvement leads to a new problem in practice: friction between the door and the cabinet. This friction is particularly noticeable when the door is opened, as the bottom of the door often rubs directly against the countertop or other contact surface of the equipment. This not only affects the smooth opening of the door, causing users to feel blocked and inconvenient during use, reducing the user experience; it can also cause physical damage to the door or cabinet surface, such as scratches or wear, affecting the product's aesthetics and structural integrity.

[0006] Especially in scenarios where doors are frequently opened and closed, such as on frequently used appliances like refrigerators and lockers, friction-induced damage gradually accumulates, further affecting the fit between the door and the cabinet, resulting in a reduced smoothness of door opening and closing, and ultimately affecting the overall lifespan and reliability of the product. This makes existing technologies significantly insufficient in terms of durability and appearance protection for high-frequency use.

[0007] 3. Most door hinge designs currently on the market lack an effective locking mechanism, meaning that the door can still be easily opened after it is closed. This defect not only adversely affects the safety and sealing effect of the equipment, but also affects certain applications that require high sealing. For example, in equipment such as freezers and refrigerators, the lack of locking force means that the door may accidentally open when disturbed by external forces, causing cold air to leak, reducing the equipment's operating efficiency and increasing energy consumption. In cases involving high-end storage cabinets or precision instruments, the easy-to-open feature of the door also increases the risk of accidental or unauthorized opening, affecting the safety of items inside the equipment, so further improvements are necessary. Utility Model Content

[0008] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a lifting door hinge with a simple structure, easy to use, which can provide a door lifting function on the basis of realizing the basic opening and closing functions, so as to avoid friction between the box door and the table top, reduce the gap between the box door and the box body, and provide a door locking force in the closed state.

[0009] The purpose of the utility model is achieved by the following method: a lifting door hinge with door locking force, comprising a main body and a trigger, wherein a first swing arm and a second swing arm are hingedly mounted on the main body, the other ends of the first swing arm and the second swing arm are hingedly connected to the trigger, and the first swing arm and the second swing arm swing relative to the main body and the trigger to realize the opening and closing of the hinge;

[0010] The main body is further provided with an accommodating cavity, in which a pulling arm is installed. The front end of the pulling arm is hinged to the second swing arm, and the rear end of the pulling arm is connected to the main body via a tension spring. The tension spring generates a pulling force through the pulling arm and the second swing arm to always pull the trigger in the closing direction.

[0011] A guide boss is extended from the rear of the second swing arm toward the main body, and a guide wheel is provided in the pulling arm. The guide wheel always moves toward the guide boss under the push of the elastic support device. When the hinge is closed to the set angle, the guide boss and the guide wheel squeeze each other to generate a door closing locking force.

[0012] In one embodiment, the guide boss is an arc-shaped protrusion provided on the side wall of the second swing arm.

[0013] In one embodiment, both sides of the guide boss are arc-shaped transition surfaces protruding outward.

[0014] In one embodiment, the side of the guide boss facing the trigger is an outwardly protruding arc-shaped transition surface; the side away from the trigger is a flat avoidance surface.

[0015] In one embodiment: the elastic support device includes a push spring limiting hole and a push spring guide groove arranged in the pulling arm; it also includes a push spring frame, the tail of the push spring frame is inserted into the push spring limiting hole, and the guide wheel is installed on the head of the push spring frame through a push spring shaft; the two ends of the push spring shaft are also slidably installed in the push spring guide groove; a spring is also installed on the push spring frame, and the spring pushes the push spring frame to always move in the direction of the guide boss, forcing the guide wheel to contact the guide boss.

[0016] In one embodiment, the tail of the pulling arm is connected to a first guide shaft, the main body is provided with a first guide groove, and the first guide shaft is slidably installed in the first guide groove.

[0017] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0018] 2. The hinge design of this utility model effectively controls the movement path of the door by providing an accommodation cavity within the main body and employing a specific swing arm structure. Through precise articulation and structural design, the excess gap between the door and the cabinet body is reduced, allowing the door to fit tightly against the cabinet body when closed. This not only solves the unsightly problem caused by excessive gaps at the bottom of the door in traditional hinge designs, but also enhances the refinement and consistency of the overall cabinet, meeting the stringent requirements for detail and visual quality found in high-end home appliances and furniture.

[0019] 3. In this utility model, smooth hinge movement is achieved through the design of a unique guide boss and guide wheel structure within the pull arm. During the closing process of the hinge, the guide wheel, driven by the elastic support device, always maintains contact with the guide boss, ensuring the guidance and smoothness of the movement path. This design avoids unnecessary friction between the door and the equipment table or cabinet during opening and closing, thereby improving the smoothness of the door opening and making the user feel smooth and easy during operation. This frictionless movement also reduces physical wear on the cabinet surface and door, thereby extending the service life of the equipment.

[0020] 4. The present invention specifically proposes a door locking function achieved through an elastic support device and a guide structure. When the hinge is closed to a set angle, the guide boss and the guide wheel squeeze each other to generate a locking force, so that the door can remain firmly fixed after closing. This design overcomes the problem of the lack of a door locking mechanism in traditional hinges, significantly improving the safety and sealing effect of the door. For equipment that requires good airtightness and prevention of accidental opening, such as refrigerators, freezers, precision storage equipment, etc., the present invention provides a simple and effective locking solution, which effectively prevents leakage caused by accidental opening of the door or exposure of items inside the equipment.

[0021] 5. This new hinge integrates the pull arm and elastic support device into the main body, and provides a spring-loaded stopper hole and spring-loaded guide slot, resulting in a more compact overall structure. This design not only reduces internal space requirements but also facilitates integration with various cabinet types, offering excellent compatibility and application flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 、 2 This is a structural diagram of the door hinge in the closed state of the utility model.

[0023] Figure 3 、 4 This is a structural diagram of the door hinge in the open state of the utility model.

[0024] Figure 5 This is a structural exploded view of the utility model.

[0025] Figure 6 This is a cross-sectional view of the structure of the door hinge in the closed state of the utility model.

[0026] Figure 7 For this utility model Figure 6 A magnified view of the structure of part A.

[0027] Figure 8 、 9 This is a cross-sectional view of the structure of the first embodiment of the guide boss in the present utility model.

[0028] Figure 10 This is a cross-sectional view of the structure of the second embodiment of the guide boss in the present utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings. A lift door hinge with door locking capability comprises a main body 1 and a trigger 2. A first swing arm 3 and a second swing arm 4 are hingedly mounted on the main body 1. The other ends of the first and second swing arms 3 and 4 are hingedly connected to the trigger 2. The first and second swing arms 3 and 4 swing relative to the main body 1 and trigger 2 to open and close the hinge.

[0030] The main body 1 is further provided with an accommodating chamber 11, in which a pulling arm 5 is installed. The front end of the pulling arm 5 is hinged to the second swing arm 4, and the rear end of the pulling arm 5 is connected to the main body 1 via a tension spring 9. The tension spring 9 generates a pulling force through the pulling arm 5 and the second swing arm 4 to always pull the trigger 2 in the closing direction.

[0031] A guide boss 6 is extended from the rear of the second swing arm 4 toward the main body, and a guide wheel 82 is provided in the pulling arm 5. The guide wheel 82 always moves toward the guide boss 6 under the push of the elastic support device. When the hinge is closed to the set angle, the guide boss 6 and the guide wheel 82 squeeze each other to generate a locking force for closing the door.

[0032] In one embodiment, the guide boss 6 is an arc-shaped protrusion provided on the side wall of the second swing arm 4 .

[0033] In one embodiment, both sides of the guide boss 6 are arc-shaped transition surfaces 61 protruding outward.

[0034] In one embodiment, the side of the guide boss 6 facing the trigger is an outwardly protruding arc-shaped transition surface 61; the side away from the trigger is a flat avoidance surface 62.

[0035] In one embodiment, the elastic support device includes a push spring limiting hole 52 and a push spring guide groove 53 provided in the pulling arm 5; it also includes a push spring frame 8, the tail of the push spring frame 8 is inserted into the push spring limiting hole 52, and the guide wheel 82 is installed on the head of the push spring frame 8 through the push spring shaft 81; the two ends of the push spring shaft 81 are also slidably installed in the push spring guide groove 53; a spring 83 is also mounted on the push spring frame 8, and the spring 83 pushes the push spring frame 8 to always move in the direction of the guide boss 6, forcing the guide wheel 82 to contact the guide boss 6.

[0036] In one embodiment, the tail of the pulling arm 5 is connected to a first guide shaft 51 , and a first guide groove 12 is provided on the main body 1 , and the first guide shaft 51 is slidably installed in the first guide groove 12 .

[0037] Working principle:

[0038] Opening Process: When the user applies force to the door, trigger 2 rotates the first and second swing arms 3 and 4 about their hinged connections on the main body 1. This movement transmits force through the hinged connection of the pull arm 5, maintaining the hinge's predetermined trajectory. At this point, the guide wheel 82, under the action of the elastic support mechanism, continuously moves toward the guide boss 6, ensuring close contact between the guide wheel and the boss. This contact effectively guides the door's opening and closing, ensuring a smooth, non-binding opening process.

[0039] Closing Process: During the closing process, the first and second swing arms 3 and 4 swing relative to the main body 1 and the pull arm 5, driven by the trigger 2, gradually push the door back to the closed position. The tension generated by the tension spring 9 acts on the trigger 2 through the pull arm 5 and the second swing arm 4, causing the door to naturally return to the closed position. During this process, the guide wheel 82, driven by the elastic support device, maintains close contact with the guide boss 6, ensuring smooth and precise closing of the door.

[0040] When the door is closed to a set angle, the guide boss 6 and the guide wheel 82 squeeze each other, generating additional locking force. This mechanism ensures that the door is effectively locked after closing, preventing it from accidentally opening due to external forces or vibration. The design of the elastic support device ensures that the guide wheel 82 is always forced to move toward the guide boss 6, maintaining good contact and compression between the guide wheel and the guide boss. This design not only provides locking force, but also enhances the stability and sealing effect of the closed state, effectively improving the safety of the cabinet equipment.

[0041] Traditional door hinges often lack locking force after closing, making them prone to accidental opening and compromising equipment safety. The present invention provides a simple and effective door locking mechanism through the mutual compression between the guide boss and the guide wheel. This locking function not only improves the safety and security of the door, but is also particularly important in equipment that requires the door to remain closed for extended periods, such as refrigerators and precision instrument storage cabinets.

[0042] The guide boss 6 is provided on the second swing arm 4, while the guide wheel 82 is mounted within the pull arm 5. It is elastically supported by the push spring frame 8 and the push spring 83 and constantly moves toward the guide boss. This design ensures that the guide wheel 82 constantly interacts with the guide boss 6 throughout the hinge's opening and closing process, ensuring smooth and reliable movement.

[0043] By integrating the guide wheel and guide boss, this new design effectively avoids the friction between the door and the cabinet body encountered in traditional designs, eliminating the physical wear caused by reducing the gap. This structural design ensures that the door's opening and closing movements always follow a precise guide path, providing users with a smooth and effortless experience and enhancing the user experience. Furthermore, reduced friction helps extend the life of the device, especially in high-frequency operation scenarios.

[0044] Among them, it should be noted that: Figure 7 、 8 As shown, both sides of the guide boss 6 are outwardly protruding arc-shaped transition surfaces 61. Therefore, during the hinge opening and closing process, the guide wheel contacts the arc-shaped transition surface 61, so that the elastic pressure always exists, thereby making the door opening and closing guide wheel run more smoothly.

[0045] like Figure 9 、 10 As shown, the side of the guide boss 6 facing the trigger is an outwardly protruding arc-shaped transition surface 61; the side away from the trigger is a flat avoidance surface 62. Therefore, when the hinge is opened to the set angle, the flat avoidance surface 62 is separated from the guide wheel, so that the guide wheel pressure is no longer applied to the second swing arm, so that the hinge is separated from the guide wheel when it is opened to the set angle, and when it is closed to the set angle, the guide wheel contacts the outwardly protruding arc-shaped transition surface 61 on the side of the guide boss 6 facing the trigger, and the door locking force can intervene. The above two implementations bring different door opening and closing experiences to users, and users can choose according to their actual needs. When manufacturers manufacture this product, they only need to replace the second swing arm, and other accessories can be used universally, which makes it more convenient and quick for manufacturers to change production.

[0046] Furthermore, the front end of the pull arm 5 is hinged to the second swing arm 4, and the rear end is connected to the main body 1 via a tension spring 9. This design ensures that the tension spring 9 always applies tension when the door is opened or closed, keeping the door moving in the closing direction. This force slows and controls the speed of the door during closing, avoiding the impact that may occur due to excessive closing speed, thereby protecting the structural integrity of the device.

[0047] Furthermore, a push spring limiting hole 52 and a push spring guide groove 53 are provided in the pull arm 5, and the push spring frame 8 and spring 83 are combined to allow the push spring frame 8 to slide in the guide groove. This structural design ensures that the guide wheel 82 always moves in the direction of the guide boss when subjected to external force and maintains a stable guiding state, thereby achieving good locking and reset functions.

[0048] Through the optimized design of the elastic support device, this utility model not only ensures the door closes smoothly and generates locking force, but also provides a good buffering effect, avoiding severe impact during the closing process. This buffering and control design enhances the long-term durability of the equipment and reduces the structural damage that may be caused by prolonged operation.

[0049] In summary, the present invention achieves smooth movement of the door during opening and closing, as well as effective locking after closing, through the coordinated work among the main body, the first swing arm, the second swing arm, the tension arm, the tension spring, the guide boss, the guide wheel, and the elastic support device. During the entire working process, the close fit between the guide wheel and the guide boss provides precise guidance, while the elastic support device provides a smooth buffer and locking force. This unique hinge structure not only eliminates the appearance problems caused by gaps in traditional door hinges, but also effectively avoids damage caused by friction, and provides stable locking after the door is closed, comprehensively improving the safety, aesthetics, and user experience of the equipment, so it can be widely promoted and used.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A lift door hinge with door locking force, characterized by: It comprises a main body (1) and a trigger (2), wherein a first swing arm (3) and a second swing arm (4) are hingedly mounted on the main body (1), the other ends of the first swing arm (3) and the second swing arm (4) are hingedly connected to the trigger (2), and the first swing arm (3) and the second swing arm (4) swing relative to the main body (1) and the trigger (2) to realize the opening and closing of the hinge; The main body (1) is further provided with a receiving chamber (11), and a pulling arm (5) is installed in the receiving chamber (11). The front end of the pulling arm (5) is hinged to the second swing arm (4), and the rear end of the pulling arm (5) is connected to the main body (1) via a tension spring (9). The tension spring (9) generates a pulling force to always pull the trigger (2) in the closing direction through the pulling arm (5) and the second swing arm (4); A guide boss (6) is extended from the rear of the second swing arm (4) toward the main body, and a guide wheel (82) is provided in the pull arm (5). The guide wheel (82) always moves toward the guide boss (6) under the push of the elastic support device. When the hinge is closed to a set angle, the guide boss (6) and the guide wheel (82) squeeze each other to generate a door closing locking force.

2. The lift door hinge with door locking force according to claim 1, characterized in that: The guide boss (6) is an arc-shaped protrusion provided on the side wall of the second swing arm (4).

3. A lift door hinge with door locking force according to claim 1 or 2, characterized in that: Both sides of the guide boss (6) are arc-shaped transition surfaces (61) protruding outwards.

4. A lift door hinge with door locking force according to claim 1 or 2, characterized in that: The side of the guide boss (6) facing the trigger is an outwardly protruding arc-shaped transition surface (61); the side facing away from the trigger is a flat avoidance surface (62).

5. The lift door hinge with door locking force according to claim 1, characterized in that: The elastic support device includes a push spring limiting hole (52) and a push spring guide groove (53) arranged in the pulling arm (5); it also includes a push spring frame (8), the tail of the push spring frame (8) is inserted into the push spring limiting hole (52), and the guide wheel (82) is installed on the head of the push spring frame (8) through the push spring shaft (81); the two ends of the push spring shaft (81) are also slidably installed in the push spring guide groove (53); a spring (83) is also installed on the push spring frame (8), and the spring (83) pushes the push spring frame (8) to always move in the direction of the guide boss (6), forcing the guide wheel (82) to contact the guide boss (6).

6. The lift door hinge with door locking force according to claim 1, characterized in that: The tail of the pulling arm (5) is connected to a first guide shaft (51), and a first guide groove (12) is provided on the main body (1), and the first guide shaft (51) is slidably installed in the first guide groove (12).

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