Hardware hinge with large-angle opening function

Abstract

A hardware hinge with a large opening angle includes a hinge arm and a hinge cup. A first link and a second link are hinged to the hinge arm, and a third link and a fourth link are hinged to the hinge cup. The second link's other end is hinged to the fourth link; the third link's other end is hinged to the first link; and the middle of the first link is hinged to the middle of the fourth link. Each link rotates around its hinge point, achieving displacement between the hinge cup and the hinge arm. The beneficial effect of this invention is that it abandons the traditional four-link structure and innovatively adopts a special six-link composite mechanism. This multi-link design optimizes the door panel's movement trajectory, allowing the door panel to extend further outward during opening, thus breaking through the traditional hinge's angle limitation of approximately 110 degrees.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, specifically a hardware hinge with a large-angle opening function. Background Technology

[0002] In the home decoration and furniture manufacturing industries, hinges are crucial connecting components. Currently, the most widely used concealed hinges are typically designed based on the classic four-bar linkage principle. This traditional four-bar hinge mainly consists of a hinge arm fixed to the cabinet body, a hinge cup embedded in the door panel, and two connecting rods (usually called the inner and outer connecting rods) that connect the hinge arm and the hinge cup. Four-bar hinges meet the opening and closing needs of most conventional furniture cabinet doors due to their relatively simple structure, mature manufacturing process, controllable cost, and certain load-bearing capacity.

[0003] However, with the development of modern home design concepts and the increasing demands of users for user experience, traditional four-bar hinges have gradually revealed some significant technical defects in practical applications, especially in terms of inherent limitations in opening angle: 1. The opening angle is limited, which cannot meet the needs of specific scenarios: Traditional four-bar hinges typically limit the maximum opening angle to between 95 and 110 degrees. This angle might be sufficient for ordinary wardrobes or small cabinets, but it falls short in many specific applications. For example, corner cabinets or L-shaped cabinets: in these areas, if the door opening angle is too small, the opened door will obstruct the user's view and operating space, making it very difficult to access items deep inside the cabinet (such as using corner pull-out baskets).

[0004] Large storage cabinets with built-in drawers or pull-out baskets: To smoothly pull out the wide internal drawers or pull-out baskets, the cabinet doors must be able to open to a sufficiently large angle (usually 160 degrees or more) to completely avoid the movement path of the drawers. Existing four-bar hinges often cause interference and collisions between the door panel and the drawer.

[0005] In areas with narrow passageways: cabinets with doors that open at a small angle may protrude into the passageway, obstructing passage, causing safety hazards or inconvenience.

[0006] 2. The inherent difficulty of achieving large angles in four-bar linkages: From a kinematics perspective, achieving a larger opening angle (e.g., 165 or 175 degrees) in a four-bar linkage requires extreme adjustments to the length ratios of each link and the positions of the hinge points. This often results in a significant increase in the overall size of the hinge, occupying more cabinet space; or it can cause problems such as dead points, uneven movement, and deterioration of stress conditions during operation, severely affecting the hinge's lifespan and stability.

[0007] 3. The latent demand for high-quality sports experiences is not being fully met: In addition to the need for large opening angles, modern users also expect cabinet doors to have excellent movement quality throughout the entire opening and closing process. While some existing four-bar hinges integrate damping or self-closing functions, ensuring smoothness throughout the long stroke while achieving large opening angles, and providing stable, quiet cushioning and reliable self-closing force at the closing end, poses a greater challenge to the hinge's structural design. Traditional, simple mechanisms struggle to perfectly achieve these combined functions while accommodating large opening angles. Therefore, further improvements are necessary. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a hardware hinge that is simple in structure, low in manufacturing cost, can break through the angle limitations of traditional four-bar linkages, provide a larger opening angle, and is structurally stable, smooth in movement, and integrates good buffering and self-closing experience.

[0009] The purpose of this utility model is achieved in the following way: a hardware hinge with a large opening angle function, which includes a hinge arm and a hinge cup, a first connecting rod and a second connecting rod are hingedly installed on the hinge arm, and a third connecting rod and a fourth connecting rod are hingedly installed on the hinge cup. Wherein: the other end of the second link is hinged to the fourth link; The other end of the third link is hinged to the first link, and the middle part of the first link is hinged to the middle part of the fourth link. Each link rotates around its hinge point to realize the displacement between the hinge cup and the hinge arm.

[0010] Furthermore: a clearance groove is provided in the middle of the fourth link, the first link passes through the clearance groove and is hinged to the third link, and the hinge point between the first link and the fourth link is located in the clearance groove.

[0011] Furthermore: the hinge arm is provided with a first hinge seat that is hinged to the first connecting rod, and the hinge arm is provided with a second hinge seat that is hinged to the second connecting rod.

[0012] Furthermore: the hinge cup is provided with a third hinge seat and hinged to the third connecting rod, and the hinge cup is provided with a fourth hinge seat and hinged to the fourth connecting rod.

[0013] Furthermore, the third and fourth hinge seats are located on both sides of the hinge cup opening.

[0014] Furthermore, a drive seat is installed inside the third link, and the drive seat is driven to rotate by a torsion spring. Correspondingly, a cam is provided inside the first link, and the drive seat slides in cooperation with the cam to provide closing force at the end of the hinge closing process.

[0015] Furthermore: a guide seat is fixed inside the fourth link, and a buffer seat is slidably connected inside the guide seat. A damper is provided between the guide seat and the buffer seat. When the hinge is closed, the second link pushes the buffer seat to move, which plays a damping role when the hinge is closed.

[0016] Furthermore, a blocking rod is installed inside the second connecting rod, and the buffer seat presses against the blocking rod.

[0017] Furthermore, the side wall of the first link is provided with a shock-absorbing block. When the hinge is opened to the maximum angle, the shock-absorbing block presses against the fourth link, limiting the maximum opening angle of the hinge.

[0018] Furthermore: the damping blocks are disposed on both sides of the first connecting rod, and a connecting block is disposed across the first connecting rod, the connecting block connecting the damping blocks into one unit.

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

[0020] 2. This utility model abandons the traditional four-bar structure and innovatively adopts a special six-bar composite mechanism. This multi-bar design optimizes the movement trajectory of the door panel, allowing it to extend further outward during opening. This breaks through the traditional hinge's angle limitation of approximately 110 degrees, enabling ultra-large opening angles such as 165 degrees or even greater. This greatly expands the application scenarios of the hinge, effectively solving the problem of corner cabinets, built-in pull-out basket cabinets, and other applications requiring the door panel to completely avoid space, significantly improving user convenience. Simultaneously, the shock-absorbing block on the first link and the contact limit with the fourth link ensure the stability and reliability of the hinge when reaching the maximum opening angle.

[0021] 3. This utility model ingeniously integrates an automatic closing device within a complex linkage mechanism. By setting a drive seat driven by a torsion spring within the third link, and having it slide in engagement with a cam located within the first link, a built-in mechanical conversion mechanism is constructed. At the end of the hinge closing process, the energy released by the torsion spring acts on a specific surface of the cam through the drive seat, generating a continuous closing torque that actively pulls the door panel to the closed position until it is completely sealed. This design effectively prevents the cabinet door from springing back or leaving gaps due to inertia or wind force, ensuring the airtightness and neat appearance of the cabinet.

[0022] 4. This invention integrates high-quality damping and buffering functions within a compact linkage space. By setting a guide seat, a buffer seat, and a damper inside the fourth linkage, and utilizing the trajectory of the second linkage during the closing motion to push the buffer seat to compress the damper, when the door panel accelerates to close under self-closing force, the second linkage presses against the buffer seat, and the damper immediately engages, absorbing the kinetic energy of the moving parts and converting it into heat energy for dissipation. This significantly decelerates the door panel at the last moment before contacting the cabinet, achieving a gentle and silent closing effect. This not only eliminates annoying collision noise but also greatly extends the service life of the hinges and cabinet, enhancing the overall quality of the furniture. Attached Figure Description

[0023] Figure 1 This is a diagram showing the hinge in the open position in this utility model.

[0024] Figure 2 , 3 This is a rendering of the hinge in a partially open position in this utility model.

[0025] Figure 4 , 5 This is a diagram showing the hinge in the closed position in this utility model.

[0026] Figure 6 , 7 Figures 8 and 9 are exploded views of the present invention.

[0027] Figure 9 This is a schematic diagram of the drive seat structure in this utility model.

[0028] Figure 10 This is a schematic diagram of the guide seat structure in this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. First connecting rod; 2. Second connecting rod; 3. Third connecting rod; 4. Fourth connecting rod; 41. Clearance groove; 5. Hinge cup; 51. Third hinge seat; 52. Fourth hinge seat; 6. Hinge arm; 61. First hinge seat; 62. Second hinge seat; 7. Drive seat; 71. Torsion spring; 72. Cam; 8. Guide seat; 81. Buffer seat; 82. Damper; 83. Stop bar; 9. Shock absorber block; 91. Connecting block. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings. A hardware hinge with a large opening angle function includes a hinge arm 6 and a hinge cup 5. A first connecting rod 1 and a second connecting rod 2 are hingedly installed on the hinge arm 6, and a third connecting rod 3 and a fourth connecting rod 4 are hingedly installed on the hinge cup 5. Wherein: the other end of the second connecting rod 2 is hinged to the fourth connecting rod 4; The other end of the third link 3 is hinged to the first link 1, and the middle part of the first link 1 is hinged to the middle part of the fourth link 4. Each link rotates around its hinge point to realize the displacement between the hinge cup 5 and the hinge arm 6.

[0031] In this embodiment: This structure is a specific six-bar linkage system, consisting of a hinge arm 6, a hinge cup 5, and four intermediate transmission links. When an external force is applied to the hinge cup 5 connecting the door panel to open or close it, since the hinge points between each link and between the link and the arm / cup are fixed (i.e., the link length is constant), the four links are forced to rotate in coordination around their respective hinge axes. In particular, the mutual hinge between the middle of the first link 1 and the middle of the fourth link 4, and their respective connections to the ends of the third link 3 and the second link 2, define the specific motion trajectory of the hinge cup 5 relative to the hinge arm 6.

[0032] Compared to traditional four-bar hinges, this special six-bar structure design can generate more complex motion trajectories, allowing the door panel to be thrown outward a greater distance when opened, thus breaking through traditional angle limitations and achieving a larger opening angle, such as greater than 160 degrees, to meet the needs of special cabinets.

[0033] In one embodiment: a clearance groove 41 is provided in the middle of the fourth link 4, the first link 1 passes through the clearance groove 41 and is hinged to the third link 3, and the hinge point between the first link 1 and the fourth link 4 is located in the clearance groove 41.

[0034] In this embodiment, the specific structure when the first link and the fourth link are cross-connected is described. A clearance slot 41 on the fourth link 4 provides a physical space, allowing the first link 1 to pass through the solid plane of the fourth link without collision or interference. The hinge point of both is cleverly arranged within this slot, allowing them to rotate relative to each other within a limited space. This achieves a cross-overlapping arrangement of multiple links in a compact space, avoiding motion interference, ensuring smooth movement of the mechanism, and controlling the overall thickness and volume of the hinge.

[0035] In one embodiment: the hinge arm 6 is provided with a first hinge seat 61 that is hinged to the first connecting rod 1, and the hinge arm 6 is provided with a second hinge seat 62 that is hinged to the second connecting rod 2.

[0036] In this embodiment: the hinge arm 6 is a component fixed to the cabinet. The first hinge seat 61 and the second hinge seat 62 provide two fixed fulcrums. The first link 1 and the second link 2 rotate around these two fixed fulcrums respectively, supporting the entire linkage mechanism and bearing the reaction force during the movement.

[0037] In one embodiment: the hinge cup 5 is provided with a third hinge seat 51 that is hinged to the third connecting rod 3, and the hinge cup 5 is provided with a fourth hinge seat 52 that is hinged to the fourth connecting rod 4.

[0038] In this embodiment: the hinge cup 5 is a component pre-embedded in the door panel. The third hinge seat 51 and the fourth hinge seat 52 are two motion fulcrums on the side of the door panel. The end motion of the third link 3 and the fourth link 4 is transmitted to the hinge cup through these two seats, thereby driving the door panel to open and close. It can stably convert the complex motion of the linkage mechanism into the opening and closing action of the door panel, ensuring reliable connection.

[0039] In one embodiment, the third hinge seat 51 and the fourth hinge seat 52 are located on both sides of the opening of the hinge cup 5. This arrangement defines the spatial distribution of the two force-bearing points on the hinge cup, maintaining a certain physical distance between them on both sides of the hinge cup opening. This increases the span between the two support points on the door panel side, improves the structural stability of the door panel connection, and helps resist the torsional moment generated by the door panel's own weight when opening at a large angle.

[0040] In one embodiment: a drive seat 7 is installed inside the third link 3, and the drive seat 7 is driven to rotate by a torsion spring 71. Correspondingly, a cam 72 is provided inside the first link 1, and the drive seat 7 slides with the cam 72 to provide closing force at the end of the hinge closing process.

[0041] In this embodiment: During the hinge opening and closing process, relative rotation occurs between the third link 3 and the first link 1. The drive seat 7, built into the third link, slides against the surface of the cam 72 within the first link under the continuous pressure of the torsion spring 71. The profile of the cam 72 is specially designed so that when the hinge enters the final stage of the closing process, such as the last 20 degrees, the drive seat slides onto a specific inclined surface of the cam. At this time, the elastic force of the torsion spring generates a component force through the inclined surface, forming a torque that tends to close the hinge.

[0042] Therefore, at the closing end, the door panel is actively pulled to a fully closed state to prevent gaps from remaining due to insufficient inertia or slight resistance.

[0043] In one embodiment: a guide seat 8 is fixed inside the fourth link 4, and a buffer seat 81 is slidably connected inside the guide seat 8. A damper 82 is provided between the guide seat 8 and the buffer seat 81. When the hinge is closed, the second link 2 pushes the buffer seat 81 to move, which plays a damping role when the hinge is closed.

[0044] In this embodiment, the fourth link 4 integrates a component such as a guide seat 8, a slidable buffer seat 81, and a damper 82, similar to a hydraulic cylinder. During hinge closing, when a specific angle is reached, the movement trajectory of the second link 2 causes it to contact and begin pushing the buffer seat 81. The buffer seat, under pressure, slides inward along the guide seat, thereby compressing the damper 82. The damper generates high resistance when compressed, absorbing the kinetic energy of the door panel.

[0045] This embodiment achieves a silent and gentle closing function. It effectively reduces the speed at which the door closes, preventing violent impacts on the cabinet that could generate noise and damage the furniture.

[0046] In one embodiment, a stop bar 83 is installed within the second link 2, and the buffer seat 81 presses against the stop bar 83. When closed, it is this stop bar 83 that physically contacts and presses against the buffer seat 81 within the fourth link. This ensures a reliable and consistent contact point between the second link and the buffer assembly, guaranteeing the stability and durability of the buffering effect.

[0047] In one embodiment: the side wall of the first link 1 is provided with a shock-absorbing block 9. When the hinge is opened to the maximum angle, the shock-absorbing block 9 presses against the fourth link 4, limiting the maximum opening angle of the hinge.

[0048] When the hinge moves in the opening direction, the first link 1 and the fourth link 4 rotate relative to each other. When the maximum opening angle allowed by the design is reached, the shock absorber 9 fixed to the side wall of the first link will physically collide with and press against the body of the fourth link 4, forming a flexible barrier and forcing the relative rotation to stop. This prevents damage to the hinge mechanism, door panel, or impact to adjacent cabinets due to excessive opening. The shock absorber material usually has a certain degree of elasticity, which can play a role in slightly buffering the impact.

[0049] In one embodiment, the shock-absorbing blocks 9 are disposed on both sides of the first connecting rod 1, and a connecting block 91 is disposed across the first connecting rod 1, connecting the shock-absorbing blocks 9 into a single unit. The limiting structure is not a single-sided cantilever shape, but rather straddles the first connecting rod 1 like a "saddle," with shock-absorbing blocks 9 on both sides of the first connecting rod, connected into a single frame by the connecting block 91. The double-sided abutment can better balance the impact force during limiting, preventing the limiting structure from deforming or being damaged by the strong external force when opening at a large angle.

[0050] In summary, this utility model provides a composite hardware hinge that integrates large-angle opening, automatic closing, silent buffering, and opening limit functions. Its complete working process is based on a unique six-bar linkage and its internal integrated functional subsystems.

[0051] 1. Startup process: When the user pulls the cabinet door, the external force is transmitted to the third link 3 and the fourth link 4 through the hinge cup 5. Since the links are hinged to each other and connected to the fixed hinge arm 6, the entire six-bar linkage begins to operate. The geometric constraints of the mechanism force the door panel to move along a specific trajectory: in the initial opening stage, the door panel quickly translates outward away from the cabinet, and then rotates at a large angle.

[0052] During this process, the torsion spring in the self-closing mechanism gradually stores energy; the damping mechanism is in a reset state and does not work. When opened to the designed maximum angle, the integral shock absorber structure set on the first link 1 will physically abut against the fourth link 4, forming a rigid limit to prevent the door panel from opening further and ensure safety.

[0053] 2. Shutdown process: When the user pushes the door panel to close, the linkage mechanism moves along the opposite trajectory.

[0054] Buffer intervention phase: When the door panel closes to a certain angle, for example, 45 degrees remaining, the blocking rod 83 on the second link 2 begins to contact the buffer seat 81 located inside the fourth link 4. As closing continues, the blocking rod pushes the buffer seat to compress the damper 82 behind it. The damper generates huge resistance, absorbing the kinetic energy of the door panel, significantly slowing down the closing speed of the door panel and achieving a smooth and quiet effect.

[0055] Self-closing intervention stage: When the door panel enters the final stage of closing, for example, with 20 degrees remaining, the relative angle between the first link 1 and the third link 3 causes the torsion spring drive seat 7 built into the third link to press hard against the actuation slope of the cam 72 inside the first link under the action of elasticity.

[0056] Fully closed: At the very end of the closure, the damper's resistance decreases, while the self-closing torque generated by the cam mechanism takes over. This torque overcomes the remaining resistance, actively pulling the door panel to the fully closed position and keeping it tightly closed, completing the entire working cycle.

[0057] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0058] 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 hardware hinge with a large opening angle, characterized in that: It includes a hinge arm (6) and a hinge cup (5). A first link (1) and a second link (2) are hinged on the hinge arm (6), and a third link (3) and a fourth link (4) are hinged on the hinge cup (5). Wherein: the other end of the second link (2) is hinged to the fourth link (4); The other end of the third link (3) is hinged to the first link (1), and the middle part of the first link (1) is hinged to the middle part of the fourth link (4). Each link rotates around its hinge point to realize the displacement between the hinge cup (5) and the hinge arm (6).

2. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The fourth link (4) is provided with a clearance groove (41) in the middle. The first link (1) passes through the clearance groove (41) and is hinged to the third link (3). The hinge point between the first link (1) and the fourth link (4) is located in the clearance groove (41).

3. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The hinge arm (6) is provided with a first hinge seat (61) that is hinged to the first connecting rod (1), and the hinge arm (6) is provided with a second hinge seat (62) that is hinged to the second connecting rod (2).

4. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The hinge cup (5) is provided with a third hinge seat (51) and hinged to the third connecting rod (3), and the hinge cup (5) is provided with a fourth hinge seat (52) and hinged to the fourth connecting rod (4).

5. A hardware hinge with a large-angle opening function according to claim 4, characterized in that: The third hinge seat (51) and the fourth hinge seat (52) are located on both sides of the opening of the hinge cup (5).

6. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The third link (3) is equipped with a drive seat (7), which is driven to rotate by a torsion spring (71). Correspondingly, the first link (1) is provided with a cam (72), which slides with the drive seat (7) to provide closing force at the end of the hinge closing process.

7. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The fourth link (4) is fixed with a guide seat (8), and a buffer seat (81) is slidably connected inside the guide seat (8). A damper (82) is provided between the guide seat (8) and the buffer seat (81). When the hinge is closed, the second link (2) pushes the buffer seat (81) to move, which plays a damping role when the hinge is closed.

8. A hardware hinge with a large-angle opening function according to claim 7, characterized in that: The second link (2) is equipped with a blocking rod (83), and the buffer seat (81) presses against the blocking rod (83).

9. A hardware hinge with a large opening angle function according to claim 1, characterized in that: The first link (1) is provided with a shock absorber (9) on its side wall. When the hinge is opened to the maximum angle, the shock absorber (9) presses against the fourth link (4) to limit the maximum opening angle of the hinge.

10. A hardware hinge with a large opening angle function according to claim 9, characterized in that: The shock absorber (9) is disposed on both sides of the first connecting rod (1), and a connecting block (91) is disposed across the first connecting rod (1), the connecting block (91) connecting the shock absorber (9) into one unit.

Images