A double-acting buffer hinge

Abstract

The application discloses a door hinge with a bidirectional buffering function, which comprises a base fixed on a cabinet body and a movable seat fixed on a cabinet door, wherein the movable seat is hingedly connected with a first driving arm and a second driving arm, the movable seat is hingedly connected with a third driving arm and a fourth driving arm, and the other end of the third driving arm and the fourth driving arm is hingedly connected with the first driving arm; the movable seat, the third driving arm, the fourth driving arm and the first driving arm are connected into a four-link structure; the other end of the second driving arm is hingedly connected with the middle part of the third driving arm; an opening buffer is installed on the movable seat and connected with the fourth driving arm, when the hinge is opened to a set angle, the opening buffer and the fourth driving arm interact to generate an opening buffering force; when the hinge is closed to a set angle, the closing buffer and the fourth driving arm interact to generate a closing buffering force.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, specifically a lift-up door hinge with bidirectional buffer function. Background Technology

[0002] Flip-up doors are widely used in modern home and office furniture due to their advantages, such as not occupying extra lateral space when opened and convenient access to items. The hinge of a flip-up door, as a key component connecting the cabinet body and the flip-up door panel and enabling its opening and closing functions, directly affects the user experience and the durability of the furniture.

[0003] Currently, there are various types of lift-up door hinges on the market. They typically include fixed and movable brackets for connecting the cabinet body and door panel, as well as linkage mechanisms and assistive elements for aiding opening, supporting the door panel, and achieving a certain degree of slow closing. To improve the user experience and protect the cabinet body and door panel structure, many existing lift-up door hinges are equipped with a closing buffer function. This closing buffer function can slow down the closing speed of the door panel through damping in the final stage when the cabinet door is close to the closed position, thereby preventing the door panel from violently impacting the cabinet body, reducing noise, and preventing fingers from being pinched.

[0004] However, existing upward-opening door hinges are often designed with a focus on smooth closing and buffering, while lacking effective buffering control for the opening process. Specifically, when a user opens the cabinet door upwards, especially with greater opening force or the presence of strong assist components, the door panel often stops abruptly due to inertia when it reaches its maximum opening angle or preset stopping position.

[0005] This design, lacking an opening buffer, has several significant drawbacks:

[0006] 1. Cabinet door vibration and impact: At the end of the opening stroke, due to the lack of cushioning, the cabinet door may suddenly stop moving, causing the door panel to vibrate or shake noticeably. This vibration not only provides a poor user experience, but more importantly, this sudden impact force will directly affect the various connecting parts of the hinge and the connection between the door panel and the cabinet body.

[0007] 2. Wear and tear on components and shortened lifespan: Repeated opening and closing impacts will accelerate the wear of precision components such as internal linkages, pivots, and dampers in the hinge, which may lead to loose connections, abnormal noises, or even damage to the hinge structure, thus significantly shortening the lifespan of the hinge and the entire furniture.

[0008] 3. Safety Hazards: The shaking and impact when the cabinet door is opened may affect the items inside, especially fragile or unstable items. Furthermore, for hinge systems requiring high installation precision, continuous impact may loosen the fixing screws, affecting the overall structural stability. Therefore, further improvements are necessary. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a simple, easy-to-use, and bidirectional buffering mechanism for upward-opening doors that offers both smooth closing and gentle opening.

[0010] The purpose of this utility model is achieved by the following means: a hinge for an upward-opening door with bidirectional buffer function, which includes a base fixed on the cabinet body and a movable seat fixed on the cabinet door. A first drive arm and a second drive arm are hinged on the movable seat, and a third drive arm and a fourth drive arm are hinged on the movable seat. The other end of the third drive arm and the fourth drive arm is hinged to the first drive arm.

[0011] The movable seat is connected to the third drive arm, the fourth drive arm, and the first drive arm to form a four-bar linkage structure;

[0012] The other end of the second drive arm is hinged to the middle of the third drive arm.

[0013] An opening buffer is installed on the movable seat and connected to the fourth drive arm. When the hinge is opened to a set angle, the opening buffer and the fourth drive arm interact to generate an opening buffer force.

[0014] The first drive arm is equipped with a closing buffer that is connected to the fourth drive arm. When the hinge is closed to a set angle, the closing buffer and the fourth drive arm interact to generate a closing buffer force.

[0015] Furthermore: the opening buffer is a compression damping type hydraulic cylinder, and the opening buffer is covered with an opening guide shell, which is fixedly installed on the movable seat.

[0016] Furthermore: the fourth drive arm is provided with a squeezing cam, which protrudes in the direction of opening the buffer and contacts the cylinder part of the buffer.

[0017] Furthermore: the closing buffer is a compression damping type hydraulic cylinder, and the closing buffer is covered with a closing guide shell, which is fixedly installed on the first drive arm.

[0018] Furthermore, the tail of the closing buffer is also connected to a drive seat, which extends into and contacts the fourth drive arm.

[0019] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0020] 2. During the opening process, the interaction between the opening buffer on the movable seat and the fourth drive arm when the cabinet door is opened to a set angle generates an opening buffer force. This effectively solves the problem that existing upward-opening door hinges generally lack opening buffers, causing the cabinet door to suddenly stop due to inertia at the end of the opening, resulting in violent shaking and impact. This utility model makes the cabinet door opening process smooth and gentle, avoiding impact on the hinge itself, the door panel, and the connection points of the cabinet body.

[0021] 3. During the closing process, the closing buffer on the first drive arm and the fourth drive arm interact to generate a closing buffer force when the cabinet door is closed to a set angle. This allows the cabinet door to close slowly and quietly, avoiding a "bang" sound and preventing accidents such as pinching fingers. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hinge in the closed state in this utility model.

[0023] Figure 2 This is a schematic diagram of the hinge in the open state in this utility model.

[0024] Figure 3 This is a cross-sectional view of the structure of this utility model with the hinge in the open state.

[0025] Figure 4 In this utility model Figure 3 Enlarged view of the structure of part A.

[0026] Figure 5 This is a cross-sectional view of the structure of this utility model with the hinge in the closed state.

[0027] Figure 6 In this utility model Figure 5 Enlarged view of the structure of part B.

[0028] Figure 7 , 8 This is an exploded view of the structure of this utility model. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] A hinged top-hinged door with bidirectional buffer function includes a base 5 fixed to a cabinet body and a movable seat 6 fixed to the cabinet door. A first drive arm 1 and a second drive arm 2 are hinged to the movable seat 6. A third drive arm 3 and a fourth drive arm 4 are also hinged to the movable seat 6. The other end of the third drive arm 3 and the fourth drive arm 4 is hinged to the first drive arm 1. The movable seat 6, the third drive arm 3, the fourth drive arm 4, and the first drive arm 1 form a four-bar linkage. The other end of the second drive arm 2 is hinged to the middle of the third drive arm 3. An opening buffer 7 is installed on the movable seat 6 and connected to the fourth drive arm 4. When the hinge is opened to a set angle, the opening buffer 7 and the fourth drive arm 4 interact to generate an opening buffer force. A closing buffer 8 is installed on the first drive arm 1 and connected to the fourth drive arm 4. When the hinge is closed to a set angle, the closing buffer 8 and the fourth drive arm 4 interact to generate a closing buffer force.

[0031] In this embodiment, the base 5 is fixed to the cabinet body, and the movable seat 6 is fixed to the cabinet door. When the cabinet door is opened or closed relative to the cabinet body, the movable seat 6 will move relative to the base 5.

[0032] The movable seat 6, the first drive arm 1, the third drive arm 3, and the fourth drive arm 4 constitute the main linkage mechanism, which is described as a four-bar linkage. When the movable seat 6, i.e., the cabinet door, moves, these four components will move in coordination with each other.

[0033] Specifically, the movable seat 6 is the starting or ending point of the drive. One end of the first drive arm 1 is hinged to the movable seat 6, and the other end is also linked to the movable seat 6 through the third drive arm 3 and the fourth drive arm 4. This connection method forms two triangular closed loops that work together to constitute a linkage system, enabling the first drive arm 1 and the fourth drive arm 4 to perform specific trajectory movements according to the opening and closing state of the cabinet door.

[0034] One end of the second drive arm 2 is hinged to the movable seat 6, and the other end is hinged to the middle of the third drive arm 3. This second drive arm 2 serves to assist in support, stabilize, or transmit motion, further optimizing the motion characteristics of the entire linkage mechanism.

[0035] The opening buffer 7 is mounted on the movable base 6. When the cabinet door opens upwards and the hinge moves to the set opening angle, the fourth drive arm 4 moves to a specific position and contacts or drives the opening buffer 7. The opening buffer 7 then generates a damping force, which is the opening buffer force, and it can reduce the impact speed when the cabinet door opens to the end.

[0036] The closing buffer 8 is mounted on the first drive arm 1. When the cabinet door closes downwards, the hinge moves to a set closing angle, typically near the fully closed position. At this point, the fourth drive arm 4 moves to a specific position and contacts or drives the closing buffer 8. The closing buffer 8 then generates a damping force, which is the closing buffer force, reducing the impact speed of the cabinet door closing to its final position. The fourth drive arm 4 plays a crucial role in both opening and closing buffering, interacting with the buffer and is one of the core components that transmits motion and triggers the buffering.

[0037] The core advantage of this design is the implementation of buffering in both the opening and closing directions of the cabinet door, significantly enhancing the user experience. When opening, it prevents the door from opening too quickly to the top, thus avoiding shaking and impact; when closing, it prevents the door from violently striking the cabinet body. Through a clever linkage design, particularly by involving the fourth drive arm in both opening and closing buffering, the structure is relatively compact and the function highly efficient. The introduction of the four-bar linkage, along with the assistance of the second drive arm, helps to achieve smooth guidance and support during the opening and closing of the cabinet door. This two-way buffering reduces the impact force when opening and closing the door, thereby protecting the hinge components and the connection points between the cabinet door and the cabinet body, extending their service life.

[0038] In one embodiment, the opening buffer 7 is a compression damping type hydraulic cylinder, and the opening buffer 7 is covered with an opening guide shell 9, which is fixedly installed on the movable seat 6.

[0039] Furthermore: the opening buffer 7 is a compression-damping hydraulic cylinder. When the fourth drive arm 4 acts on the hydraulic cylinder at the end of the cabinet door opening, the fluid in the hydraulic cylinder generates a damping force opposite to the direction of movement through a throttling orifice or similar structure, thereby achieving buffering.

[0040] The opening guide shell 9 covers the opening buffer 7 and is fixedly mounted on the movable seat 6. The function of this guide shell is to ensure that the opening buffer can move stably in a predetermined direction when subjected to force, preventing deflection or jamming. Simultaneously, the guide shell serves as a medium for fixing the hydraulic cylinder to the movable seat 6, providing a secure installation.

[0041] In one embodiment, the fourth drive arm 4 is provided with a compression cam 10, which protrudes in the direction of opening the buffer 7 and contacts the cylinder part of the opening buffer 7.

[0042] When the cabinet door opens and the fourth drive arm 4 moves, at a specific stage of its stroke, i.e., when the hinge opens to a set angle, the compression cam 10 contacts and compresses the cylinder portion of the opening buffer 7. The compression of the cam causes the opening buffer to operate under pressure, generating a damping force, thereby achieving opening buffering. The profile curve of the cam can precisely control the timing of the buffer's intervention, the compression stroke, and the buffering force.

[0043] By designing the profile of the compression cam 10, the timing of when the buffer starts working and the magnitude of the damping force change during buffering can be controlled very precisely, achieving a more optimized buffering curve. At the same time, the cam structure can effectively convert the motion of the fourth drive arm 4 into a compressive force on the buffer.

[0044] In one embodiment, the closing buffer 8 is a compression damping type hydraulic cylinder, and the closing buffer 8 is covered with a closing guide shell 11, which is fixedly installed on the first drive arm 1.

[0045] The closing buffer 8 is also a compression-damping hydraulic cylinder. When the fourth drive arm 4 acts on the hydraulic cylinder at the closing end of the cabinet door, the hydraulic cylinder is compressed, generating a damping force to achieve the closing buffer. The closing guide shell 11 covers the outside of the closing buffer 8 and is fixedly installed on the first drive arm 1. Its function is similar to that of the opening guide shell 9, ensuring the stable movement of the closing buffer 8.

[0046] In one embodiment, the tail of the closing buffer 8 is also connected to a drive seat 12, which extends into and contacts the fourth drive arm 4. This drive seat 12 is designed to extend into and contact the interior of the fourth drive arm 4.

[0047] When the cabinet door is closed, the first drive arm 1 and the fourth drive arm 4 move relative to each other. When the door is closed to a set angle, a specific part of the fourth drive arm 4 pushes the drive seat 12, which in turn transmits the force to the cylinder or piston rod of the closing buffer 8, causing it to be compressed and generate a closing buffer force.

[0048] In summary, the core working mechanism of the upward-opening door hinge with bidirectional buffer function described in this utility model is a core linkage mechanism consisting of a movable seat 6, a first drive arm 1, a third drive arm 3 and a fourth drive arm 4, and an auxiliary second drive arm 2.

[0049] When the cabinet door opens or closes relative to the cabinet body, this linkage mechanism drives each arm to move along a predetermined trajectory.

[0050] Opening buffer process: As the cabinet door opens upwards, the fourth drive arm 4 moves to a specific position when it is close to being fully open. The pressing cam 10 on the arm contacts and presses against the opening buffer 7 hydraulic cylinder mounted on the movable seat 6, generating a damping force that slows down the opening speed of the cabinet door, thus achieving opening buffer.

[0051] Closing buffer process: As the cabinet door closes downwards, the fourth drive arm 4 moves to a specific position when it is nearing full closure. At this point, it interacts with the closing buffer 8 mounted on the first drive arm 1. The fourth drive arm 4 contacts and pushes the drive seat 12 at the tail of the closing buffer 8, causing the hydraulic cylinder to be compressed and generating a damping force, thereby slowing down the closing speed of the cabinet door and achieving a closing buffer.

[0052] Thanks to the presence of the opening and closing buffer, the impact force generated when the cabinet door opens upwards or closes downwards is effectively absorbed and mitigated. This directly reduces the instantaneous stress on the various linkage components of the hinge (such as the first, second, third, and fourth drive arms and each hinge point), and also reduces the impact on the door panel and the fixed points of the cabinet body, thereby effectively extending the service life of the hinge itself and the entire piece of furniture (such as cabinets and wall cabinets).

[0053] 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 hinge for an upward-opening door with bidirectional buffering function, characterized in that: It includes a base (5) fixed on the cabinet body and a movable seat (6) fixed on the cabinet door. A first drive arm (1) and a second drive arm (2) are hinged on the movable seat (6). A third drive arm (3) and a fourth drive arm (4) are hinged on the movable seat (6). The other end of the third drive arm (3) and the fourth drive arm (4) is hinged to the first drive arm (1). The movable seat (6) is connected to the third drive arm (3), the fourth drive arm (4), and the first drive arm (1) to form a four-bar linkage structure; The other end of the second drive arm (2) is hinged to the middle of the third drive arm (3); An opening buffer (7) is installed on the movable seat (6) and connected to the fourth drive arm (4). When the hinge is opened to a set angle, the opening buffer (7) and the fourth drive arm (4) interact to generate an opening buffer force. The first drive arm (1) is equipped with a closing buffer (8) connected to the fourth drive arm (4). When the hinge is closed to a set angle, the closing buffer (8) and the fourth drive arm (4) interact to generate a closing buffer force.

2. The upward-opening door hinge with bidirectional buffer function according to claim 1, characterized in that: The opening buffer (7) is a compression damping type hydraulic cylinder. The opening buffer (7) is covered with an opening guide shell (9), which is fixedly installed on the movable seat (6).

3. The upward-opening door hinge with bidirectional buffer function according to claim 2, characterized in that: The fourth drive arm (4) is provided with a squeezing cam (10), which protrudes in the direction of opening the buffer (7) and contacts the cylinder part of the opening buffer (7).

4. The upward-opening door hinge with bidirectional buffer function according to claim 1, characterized in that: The closing buffer (8) is a compression damping type hydraulic cylinder. The closing buffer (8) is covered with a closing guide shell (11), which is fixedly installed on the first drive arm (1).

5. A hinge for an upward-opening door with bidirectional buffering function according to claim 4, characterized in that: The tail of the closing buffer (8) is also connected to a drive seat (12), which extends into the fourth drive arm (4) and contacts it.

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