Lifting door hinge with buffering function

Abstract

A lifting door hinge with a buffering function 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 move 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, and the rear end of the pull arm is connected with the main body through a tension spring. The door hinge has the advantages that the trigger and the main body are matched with the first swing arm and the second swing arm to form a four-connecting-rod mechanism, and automatic lifting of the door body can be achieved when the box door is opened. The function effectively avoids friction between the bottom of the box door and a table top or other contact surfaces, so that physical damages such as scratches and abrasion caused by friction are prevented, and the service life of equipment is prolonged.

Description

Technical Field

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

[0002] Door hinges, as a crucial mechanical connection component, are widely used in a variety of cabinets, including refrigerators, freezers, ovens, storage cabinets, precision instruments, and high-end furniture. Their primary function is to connect the door to the cabinet, enabling smooth opening and closing, thereby effectively sealing and opening the interior of the appliance. As the modern home appliance and furniture markets continue to demand higher standards for appearance, functionality, and user experience, traditional door hinge designs are increasingly failing to meet these demands.

[0003] Existing door hinges typically use a simple hinged structure, where the door is opened by rotating the hinge shaft. While this design can meet basic opening and closing requirements, it has some significant structural and appearance flaws when used in high-end products:

[0004] 1. To ensure the door can smoothly clear the edge of the cabinet during opening, traditional hinges typically leave a certain amount of free space at the bottom of the door. While this design provides ample mechanical wiggle room, it creates a noticeable gap between the bottom of the door and the cabinet when closed. This gap detracts from the overall aesthetic of the device, making the cabinet appear less compact and refined. This is particularly noticeable in high-end home appliances, precision instruments, and high-end furniture, where exterior design is paramount. This gap can be particularly noticeable and makes it difficult to meet market expectations for refined appearance. Furthermore, consumers often prioritize detail and craftsmanship when choosing high-end products, and a noticeable gap at the bottom of the door significantly diminishes the overall sensory experience, failing to meet the aesthetic standards of the high-end market.

[0005] 2. To enhance the aesthetics of a product, designers often attempt to make the cabinet more compact by reducing the gap between the bottom of the door and the cabinet body. However, this improvement introduces a new problem: as the gap decreases, the bottom of the door is more susceptible to friction against the countertop or other contact surfaces during opening and closing. This friction not only affects the smooth opening of the door, causing inconvenience to the user when operating the door, and reducing the user experience; more seriously, this friction can easily cause physical damage to the bottom of the door and contact surfaces, such as scratches or wear. This not only affects the product's appearance quality, but may also reduce the fit between the door and the cabinet body, thereby affecting the door's sealing performance and service life. Especially in high-frequency use environments, such as refrigerator doors or high-end storage cabinet doors, the problems caused by friction will gradually intensify, ultimately affecting the long-term stability and reliability of the product.

[0006] 3. In the existing technology, most cabinet door hinge structures only meet the simple opening and closing functions and lack an effective buffering mechanism, resulting in frequent collisions or noise when the cabinet door is closed. This is a significant user experience flaw in applications such as home appliances and furniture. When closing the cabinet door, due to the lack of a buffering function, the cabinet door will directly collide with the cabinet body, which may not only damage the hinge and the cabinet body, but also generate noise, affecting the user experience. This is especially true for high-end home appliances or precision instruments. Users expect a smooth and quiet operation experience, so further improvements are necessary. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a lifting door hinge with a simple structure, easy to use, and capable of achieving the basic opening and closing functions while also providing a door lifting function to avoid friction between the box door and the table top and reduce the gap between the box door and the box body. It has a buffering function.

[0008] The purpose of the utility model is achieved by the following manner: a lifting door hinge with a buffering function, 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 move relative to the main body and the trigger to realize the opening and closing of the hinge;

[0009] 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 to always pull the second swing arm and the trigger in the closing direction.

[0010] A damper is also provided in the main body, one end of the damper is fixed to the main body, and the other end is connected to the second swing arm. When the second swing arm is closed to a set angle, the pulling arm pushes the damper to generate a damping force when the hinge is closed.

[0011] Furthermore: the first guide shaft is also connected to a pull rod, the tail of the pull rod is connected to a second guide shaft, a second guide groove is provided on the main body, the second guide shaft is slidably installed in the second guide groove, and the tension spring is connected to the pull rod.

[0012] Furthermore: the damper is installed on one side of the pull rod, one end of the damper is fixed to the main body through the third guide shaft, and the other end of the damper is pressed on the first guide shaft.

[0013] Furthermore: a third guide groove is provided on the pull rod, and the third guide shaft passes through the third guide groove and is fixedly connected to the main body.

[0014] Furthermore: the damper is of self-resetting compression damping type.

[0015] Furthermore: a push spring limiting hole and a push spring guide groove are provided in the pulling arm, the tail of the push spring frame is inserted into the push spring limiting hole, and the head of the push spring frame is slidably installed in the push spring guide groove through the push spring shaft; a guide wheel is also provided on the push spring shaft, and a spring is also installed on the push spring frame. The spring pushes the push spring frame to always move in the direction of the second swing arm, forcing the guide wheel to contact the side of the second swing arm.

[0016] Furthermore: a concave locking groove is provided on the side surface of the second swing arm, and when the hinge is closed to a set angle, the guide clip is buckled into the locking groove.

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

[0018] 2. The hinge's trigger and main body work in conjunction with the first and second swing arms to form a four-bar linkage, automatically raising the door when it is opened. This feature effectively prevents friction between the door's bottom and the countertop or other contact surface, thereby preventing physical damage such as scratches and abrasion, and extending the life of the appliance. This advantage is particularly suitable for high-end appliances, precision instruments, and furniture with demanding appearances, ensuring that the product maintains its aesthetics and integrity even under frequent use.

[0019] 3. This utility model uses a tension spring and a four-bar linkage to maintain a constant tension on the door after it is opened. The spring tension can reduce the weight of the door, balancing the weight of the door to allow the door to hover or close automatically. This design improves the stability and reliability of door closing, making daily operation more convenient and labor-saving for users.

[0020] 4. This utility model achieves a buffering function during the hinge closing process by installing a damper and a pull arm in the main body. When the door is closed to the set angle, the damper generates a buffering force, slowing the speed and force of the door closing, effectively avoiding the noise caused by the door directly hitting the cabinet body.

[0021] 5. The design of the recessed locking groove and guide buckle enables the door to automatically lock when closed to a specific angle, preventing the door from opening accidentally. This locking function not only improves the safety of the equipment during use, but also increases the stability of the hinge, effectively preventing the door from opening accidentally due to external vibration or collision, and improving the overall safety performance of the equipment. 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 、 6 This is a structural exploded view of the utility model.

[0025] Figure 7 This is an assembly diagram of the first swing arm, the second swing arm, the trigger and the main body in the utility model. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings. A lift door hinge with a buffering function is characterized in that it 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 swing arm 3 and the second swing arm 4 are hingedly connected to the trigger 2. The first swing arm 3 and the second swing arm 4 move relative to the main body 1 and the trigger 2 to open and close the hinge.

[0027] 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 to always pull the second swing arm 4 and the trigger 2 in the closing direction.

[0028] A damper 7 is also provided in the main body 1. One end of the damper 7 is fixed to the main body 1, and the other end is connected to the second swing arm 4. When the second swing arm 4 is closed to a set angle, the pulling arm 5 pushes the damper 7 to generate a damping force when the hinge is closed.

[0029] 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 .

[0030] In one embodiment, the first guide shaft 51 is also connected to a pull rod 6, the tail of the pull rod 6 is connected to a second guide shaft 61, a second guide groove 13 is provided on the main body 1, the second guide shaft 61 is slidably installed in the second guide groove 13, and the tension spring 9 is connected to the pull rod 6.

[0031] In one embodiment, the damper 7 is installed on one side of the pull rod 6 , one end of the damper 7 is fixed to the main body 1 through the third guide shaft 71 , and the other end of the damper 7 is pressed against the first guide shaft 51 .

[0032] In one embodiment, a third guide groove 63 is provided on the pull rod 6 , and the third guide shaft 71 passes through the third guide groove 63 and is fixedly connected to the main body 1 .

[0033] In one embodiment, a push spring limiting hole 52 and a push spring guide groove 53 are provided in the pulling arm 5, the tail of the push spring frame 8 is inserted into the push spring limiting hole 52, and the head of the push spring frame 8 is slidably installed in the push spring guide groove 53 through a push spring shaft 81; a guide wheel 82 is also provided on the push spring shaft 81, and a spring 83 is also mounted on the push spring frame 8. The spring 83 pushes the push spring frame 8 to always move toward the second swing arm 4, forcing the guide wheel 82 to contact the side of the second swing arm 4.

[0034] In one embodiment, a concave locking groove 41 is provided on the side surface of the second swing arm 4 , and when the hinge is closed to a set angle, the guide clip is buckled into the locking groove 41 .

[0035] Working principle: The utility model includes a main body 1, a trigger 2, a first swing arm 3 and a second swing arm 4. The main body 1 is fixed to the box body, and one end of the first swing arm 3 and the second swing arm 4 is hingedly mounted on the main body 1, and the other end is connected to the trigger 2. Through the movement of the first swing arm 3 and the second swing arm 4 relative to the main body 1 and the trigger 2, the box door can be opened and closed smoothly. Among them, the door hinge cooperates with the first swing arm and the second swing arm through the trigger and the main body to form a four-bar linkage mechanism, which can realize automatic lifting of the door body when the box door is opened. This function effectively avoids friction between the bottom of the box door and the countertop or other contact surfaces, thereby preventing physical damage such as scratches and wear caused by friction, and extending the service life of the equipment. This advantage is particularly suitable for high-end home appliances, precision instruments and furniture with high requirements on appearance, ensuring that the beauty and integrity of the product can be maintained under frequent use. At the same time, the setting of the first swing arm and the second swing arm enables the hinge to maintain smooth movement during the opening and closing process, reducing the shaking phenomenon caused by the single hinge axis design, making the opening and closing of the door smoother, especially suitable for high-end home appliances and other equipment that have high requirements for door stability.

[0036] Furthermore, a housing 11 is provided within the main body 1, housing a pull arm 5. The front end of the pull arm 5 is hinged to the second swing arm, and the rear end is connected to the main body 1 via a tension spring 9. The tension spring 9 constantly exerts a pulling force on the pull arm 5, thereby driving the second swing arm and trigger 2 in the closing direction, allowing the door to close naturally in the absence of external forces. This tension spring structure provides a continuous closing force for the door, allowing it to automatically begin closing after opening to a certain angle, reducing the burden of manual operation and making the closing process smoother and more natural, effectively improving the user experience.

[0037] Specifically, a damper 7 is mounted within the main body 1, one end of which is fixed to the main body 1 and the other end is connected to the trigger 2. When the door is closed to a set angle, the pull arm 5 pushes the damper 7, providing a damping force to the hinge during closing, slowing the speed and impact of the door closing. The introduction of the damper provides a buffering function, preventing the door from directly impacting the door body when closing, reducing noise and structural impact, and extending the service life of the hinge and door body. This is particularly important in applications such as high-end appliances and furniture where silent closing is required.

[0038] In addition, the tail of the pull arm 5 is connected to a first guide shaft 51, which is slidably mounted in the first guide groove 12 on the main body 1. This design ensures that the trajectory of the pull arm is controlled during movement, thereby achieving more precise movement. In addition, the first guide shaft 51 is also connected to the pull rod 6, and the tail of the pull rod is connected to the second guide shaft 61, which is slidably mounted in the second guide groove 13, ensuring that the movement path of the pull rod and the pull arm is controlled. Through the cooperation of the multi-stage guide structure, the box door can always maintain a stable motion trajectory during the opening and closing process, avoiding possible deviation and shaking problems. This not only improves the stability of the door body, but also reduces the mechanical wear caused by unstable movement.

[0039] Additionally, damper 7 is mounted on one side of pull rod 6, secured to main body 1 via third guide shaft 71 and pressing against first guide shaft 51. This structural design ensures that the damper's force position and operating state remain stable, ensuring consistent cushioning during each closing action. Through its fixed and pressing design, the damper effectively buffers the force applied when the door closes, enhancing the smoothness of the entire closing process. Furthermore, due to its multiple fixings, the damper's operating state is less susceptible to mechanical vibration or positional changes, enhancing its stability during long-term use.

[0040] It is important to note that when the door is closed to a set angle, a recessed locking groove 41 on the side of the second swing arm 4 engages with the guide buckle, automatically locking the door and preventing it from accidentally opening. This locking design enhances door security, preventing it from accidentally opening when the device is moved or subjected to external vibrations. This is particularly important for appliances such as refrigerators and lockers, effectively ensuring internal safety and sealing, and is therefore suitable for widespread use.

[0041] 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 a buffering function, characterized in that: 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) move 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 through the pulling arm (5) to always pull the second swing arm (4) and the trigger (2) to move in the closing direction. A damper (7) is also provided in the main body (1), one end of the damper (7) is fixed to the main body (1), and the other end is connected to the second swing arm (4). When the second swing arm (4) is closed to a set angle, the pull arm (5) pushes the damper (7) to generate a damping force when the hinge is closed.

2. The lift door hinge with a buffering function 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).

3. The lift door hinge with a buffering function according to claim 2, characterized in that: The first guide shaft (51) is also connected to a pull rod (6), the tail of the pull rod (6) is connected to a second guide shaft (61), a second guide groove (13) is provided on the main body (1), the second guide shaft (61) is slidably installed in the second guide groove (13), and the tension spring (9) is connected to the pull rod (6).

4. The lift door hinge with a buffering function according to claim 3, characterized in that: The damper (7) is installed on one side of the pull rod (6), one end of the damper (7) is fixed to the main body (1) through the third guide shaft (71), and the other end of the damper (7) is pressed on the first guide shaft (51).

5. The lift door hinge with a buffering function according to claim 4, characterized in that: The pull rod (6) is provided with a third guide groove (63), and the third guide shaft (71) passes through the third guide groove (63) and is fixedly connected to the main body (1).

6. A lift door hinge with a buffering function according to any one of claims 1 to 5, characterized in that: The damper (7) is of a self-resetting compression damping type.

7. The lift door hinge with a buffering function according to claim 1, characterized in that: The pulling arm (5) is provided with a push spring limiting hole (52) and a push spring guide groove (53), the tail of the push spring frame (8) is inserted into the push spring limiting hole (52), and the head of the push spring frame (8) is slidably installed in the push spring guide groove (53) through the push spring shaft (81); the push spring shaft (81) is also provided with a guide wheel (82), and the push spring frame (8) is also provided with a spring (83), and the spring (83) pushes the push spring frame (8) to always move in the direction of the second swing arm (4), forcing the guide wheel (82) to contact the side of the second swing arm (4).

8. The lift door hinge with a buffering function according to claim 7, characterized in that: The side surface of the second swing arm (4) is provided with a concave locking groove (41), and when the hinge is closed to a set angle, the guide clip is buckled into the locking groove (41).

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