Swing bar and hinge for a door

Abstract

The utility model relates to hinge technical field, specifically disclose a swing lever and hinge for door hinge. Wherein, swing lever includes swing lever body and the side wing of swing lever body two sides downward extension, is equipped with the reverse buckling structure on the side wing. The swing lever of utility model can be applied to cabinet door hinge, and it is as the main swing lever of cabinet door hinge, and the hinge cup linkage connection of cabinet door hinge. In practical application, the hinge cup includes the main swing lever and the auxiliary swing lever, one end of main swing lever and auxiliary swing lever is connected with hinge base, and the other end is connected with hinge cup through hinge cup connecting shaft, when the door body opens to about 90 degrees, the shaft surface contact of main swing lever and the hinge cup connecting shaft of auxiliary swing lever is produced resistance through reverse buckling structure, prevents the door panel to open to the maximum angle quickly. And when the hinge opens to the maximum angle, main swing lever and hinge cup connecting shaft are mutually locked through reverse buckling structure, guarantee the door panel to open to the maximum amplitude can stop in time, will not swing back and forth under the inertial action of door panel.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, specifically to a rocker arm and hinge for door hinges. Background Technology

[0002] In furniture hardware hinges, single-stage hinges rely solely on a single spring return mechanism. When the door panel is opened to a mid-angle (e.g., 45°), releasing external force will force it to spring back to its maximum angle (105°), resulting in a 5°-10° continuous swing and rebound. Long-term impact can cause self-tapping screws to strip, loosen, and the door panel to detach. Two-stage hinges use a four-bar linkage and double spring levers to divide the door into an automatic return section (0°-60°) and a free-hovering section (60°-105°). However, the hovering section lacks dynamic damping, and when the user opens the door forcefully, the door panel... Skipping the hovering phase and directly surging to the maximum angle, the spring deformation limit cannot absorb all the inertia, still causing 2-3 decaying rebounds (swing time > 0.5 seconds). Subsequent three-stage force solutions (such as Tiansi patent 201920156072.3) use spring clip bending and rocker arm corner-cut friction deceleration in the 90°-105° range, but due to mechanical noise, the free hovering angle is compressed to 30°, and incomplete friction buffering, slight rebounds occur, failing to meet the core user requirement of a large hovering range > 30° with zero rebound. Existing technologies all rely on spring deceleration mechanisms and lack a rigid braking structure, failing to simultaneously solve the industry problem of a large hovering range and completely eliminating rebound. Utility Model Content

[0003] The first purpose of this invention is to solve the problem that existing hinges lack a rigid braking structure, causing the door panel to bounce back and sway after being opened to the maximum angle. After repeated use, the elasticity decreases or even gets damaged. This invention provides a swing arm for door hinges.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0005] The swing arm for the door hinge includes a swing arm body and side wings extending downward along both sides of the swing arm body. The front end of the side wing is provided with a first hinge fulcrum, and the rear end is provided with a second hinge fulcrum. The side wing is provided with an inverted buckle structure.

[0006] The swing arm of this invention can be applied to cabinet door hinges, serving as the main swing arm and linked to the hinge cup. In practical applications, the hinge cup includes a main swing arm and a secondary swing arm. One end of the main and secondary swing arms is connected to the hinge base, and the other end is connected to the hinge cup via a hinge cup connecting shaft. When the door is opened to approximately 90 degrees, the main swing arm, through an inverted structure, contacts the axial surface of the hinge cup connecting shaft of the secondary swing arm, generating resistance and preventing the door panel from opening quickly to its maximum angle. Furthermore, when the hinge is opened to its maximum angle, the main swing arm, through the inverted structure, locks into the hinge cup connecting shaft, ensuring that the door panel stops promptly when it reaches its maximum opening, preventing it from swinging back and forth due to the door panel's inertia.

[0007] Furthermore, the side wing includes a front wing with a flat bottom and a rear wing extending downwards from the front wing. The inverted structure includes a buffer guide groove on the front wing with its opening facing rearward. The front end of the buffer guide groove is arc-shaped, and the rear end extends through the front wing to the rear wing. The lower end of the buffer guide groove forms a buffer pressure part between itself and the bottom of the front wing. In this design, the inverted structure on the side wing has a restraining and guiding effect on the movement of the hinge cup connecting shaft. During the process of the hinge switching from the closed state to the open state, the hinge cup connecting shaft enters the buffer guide groove from the lower side of the front wing and eventually slides into the front end of the buffer guide groove, engaging with its front end. During this process, the hinge cup connecting shaft contacts the buffer pressure part, generating buffer resistance. During the process of the hinge switching from the open state to the closed state, the hinge cup connecting shaft slides backwards from the buffer guide groove and eventually disengages from the inverted structure.

[0008] Another objective of this invention is to provide a hinge, including a base, a hinge cup, and a linkage mechanism. The linkage mechanism includes a main swing arm and a secondary swing arm. One end of the main swing arm and the secondary swing arm is connected to the hinge arm, and the other end is connected to the hinge cup via a hinge cup connecting shaft, forming a swingable four-bar linkage between the hinge arm, the main swing arm, the hinge cup, and the secondary swing arm. The main swing arm is the swing arm described in the above-mentioned design. Compared with the prior art, in this invention, the hinge switches between a closed and open state by flipping the hinge cup. During this process, the hinge cup connecting shaft moves upward and backward relative to the main swing arm. When the door is opened to approximately 90°, the edge of the inverted structure contacts the axial surface of the hinge cup connecting shaft, generating resistance and preventing the door panel from quickly opening to its maximum angle. Furthermore, when the hinge is opened to its maximum angle, the inverted structure locks into the hinge cup connecting shaft, ensuring that the door panel stops promptly when it reaches its maximum opening angle and does not swing back and forth due to the door panel's inertia.

[0009] Furthermore, it also includes a buffer mechanism, which is mounted on the base and is linked to the base.

[0010] Furthermore, the buffer mechanism includes an elastic element, which comprises a hollow shaft connection portion, a first pressure arm extending outwardly from one end of the shaft connection portion, and a second pressure arm extending outwardly from the other end of the shaft connection portion. A V-shaped structure is formed between the first pressure arm, the shaft connection portion, and the second pressure arm. The first hinge fulcrum is connected to the hinge arm via a first connecting shaft. The elastic element is sleeved on the first connecting shaft via the shaft connection portion and abuts against the inner wall of the hinge arm via the first pressure arm, and abuts against the auxiliary rocker arm via the second pressure arm. Thus, when the hinge switches from a closed state to an open state, it compresses and stores energy to absorb impact force, and when the hinge switches from an open state to a closed state, it opens and releases pressure.

[0011] Furthermore, the buffer mechanism includes a hydraulic cylinder, which is compressed when the hinge is in the closed state and stretched when the hinge is in the open state. This solution utilizes a two-stage elastic-hydraulic buffer system to achieve full-stroke kinetic energy management during opening and closing: During the opening phase, the elastic element compresses and stores energy, providing a 30-90° stepless hover, while the hydraulic cylinder stretches to temporarily store residual kinetic energy; during the closing phase, the elastic element releases energy to assist in smooth door opening, and the hydraulic cylinder powerfully compresses and dissipates energy at the end, eliminating the impact of closing. This dual-buffer synergy reduces the door panel's movement speed by more than 40%, and there is no rebound phenomenon in either the fully open or fully closed position.

[0012] Furthermore, the rear middle part of the secondary swing arm is connected to the buffer mechanism.

[0013] Furthermore, the rear of the secondary swing arm is provided with a driving protrusion. The buffer mechanism is connected to the secondary swing arm via a transmission mechanism; the transmission mechanism includes a first transmission arm and a second transmission arm; the upper ends of the first and second transmission arms are hinged to each other, forming an openable V-shaped structure; the lower end of the first transmission arm is hinged to the movable end of the buffer mechanism, and the lower end of the second transmission arm is hinged to the driving protrusion of the secondary swing arm; thus, the V-shaped structure folds or extends under the drive of the driving protrusion of the secondary swing arm, and simultaneously drives the buffer mechanism to stretch or compress. In this solution, when the hinge is in the open state, the hinge cup is parallel to the base, the driving protrusion pushes the V-shaped structure to fold, and the movable end of the buffer mechanism is stretched; when the hinge changes to the closed state, the hinge cup and the base change from parallel to perpendicular, the front end of the secondary swing arm swings downward, the driving protrusion moves to unfold the V-shaped structure, and thus the movable end of the buffer mechanism is compressed towards its main body.

[0014] Furthermore, the base also includes a fixed base. The fixed base includes a hinge arm connecting part adapted to the hinge arm and a cabinet connecting part connected to both sides of the hinge arm connecting part. The buffer mechanism is located on the inner side of the hinge arm connecting part and is connected to the hinge arm connecting part through a mounting structure.

[0015] Furthermore, the mounting structure includes a guide shaft disposed on the rear side of the buffer mechanism. Both ends of the guide shaft are slidably engaged with linear guide grooves disposed on both sides of the hinge arm connection portion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pendulum rod.

[0017] Figure 2 It is a structural decomposition of the hinge in its unfolded state. Figure 1 ;

[0018] Figure 3 This is a structural diagram showing the hinge in its unfolded state. Figure 1 ;

[0019] Figure 4 It is a structural decomposition of the hinge in its unfolded state. Figure 2 ;

[0020] Figure 5 It is a structural decomposition of the hinge in its unfolded state. Figure 3 ;

[0021] Figure 6 It is a structural breakdown of the hinge in the closed state. Figure 1 ;

[0022] Figure 7 It is a structural decomposition of the hinge in the suspended state. Figure 2 ;

[0023] Figure 8 It is an assembly diagram of the linkage mechanism and the buffer mechanism in the closed state;

[0024] Figure 9 It is an assembly diagram of the linkage mechanism and the buffer mechanism in the hovering state;

[0025] Figure 10 This is a structural schematic diagram of an elastic element.

[0026] Label Explanation:

[0027] Base 1, Fixed base 2, Hinge arm connecting part 21, Cabinet connecting part 22, Guide shaft 23, Linear guide groove 24, Hinge arm 3, First connecting hole 31, Second connecting hole 32, Hinge cup 4, Third connecting hole 41, Fourth connecting hole 42, Third connecting shaft 43, Fourth connecting shaft 44, Second connecting shaft 45, Linkage mechanism 5, Main swing rod 6, Side wing 61, Front wing 61a, Rear wing 61b, Inverted structure 62, Second hinge fulcrum 63, Buffer top pressing part 64, First hinge fulcrum 65, First connecting shaft 66, Secondary swing rod 7, Drive protrusion 71, Elastic element 81, Connecting part 811, First pressure arm 812, Second pressure arm 813, Bending part 814, Top pressing shaft 82, Hydraulic cylinder 83, Transmission mechanism 9, First transmission arm 91, Second transmission arm 92. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0029] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0030] Example 1:

[0031] See Figure 1 As shown, this embodiment discloses a rocker arm for a door hinge, including a rocker arm body and side wings 61 extending downward along both sides of the rocker arm body. The front end of the side wing 61 is provided with a first hinge fulcrum 65, and the rear end is provided with a second hinge fulcrum 63. The side wing 61 is provided with an inverted buckle structure.

[0032] Further optimizing the above scheme, the side wing 61 includes a front wing 61a with a flat bottom and a rear wing 61b extending downwards from the front wing 61a. The inverted structure 62 includes a buffer guide groove on the front wing 61a with its opening facing rearward. The front end of the buffer guide groove is arc-shaped to match the hinge cup connecting shaft 44, and the rear end extends through the front wing 61a to the rear wing 61b. A buffer pressure part 64 is formed between the lower end of the buffer guide groove and the bottom of the front wing 61a. In this scheme, the inverted structure 62 on the side wing 61 has a restraining and guiding effect on the movement of the hinge cup connecting shaft 44. During the process of the hinge switching from the closed state to the open state, the hinge cup connecting shaft 44 enters the buffer guide groove from the lower side of the front wing 61a and finally slides into the front end of the buffer guide groove, engaging with its front end. During this process, the hinge cup connecting shaft 44 contacts the buffer pressure part 64, generating buffer resistance. During the process of the hinge switching from the open state to the closed state, the hinge cup connecting shaft 44 slides backward from the buffer guide groove and eventually disengages from the inverted buckle structure 62.

[0033] The swing arm in this embodiment can be applied to cabinet door hinges, serving as the main swing arm and linked to the hinge cup 4 of the cabinet door hinge. In practical applications, the hinge cup 4 includes a main swing arm and a secondary swing arm. One end of the main swing arm and the secondary swing arm is connected to the hinge base 1, and the other end is connected to the hinge cup 4 through the hinge cup connecting shaft. When the door is opened to approximately 90 degrees, the main swing arm, through an inverted structure, contacts the axial surface of the hinge cup connecting shaft of the secondary swing arm, generating resistance and preventing the door panel from opening quickly to its maximum angle. Furthermore, when the hinge is opened to its maximum angle, the main swing arm, through the inverted structure, locks into the hinge cup connecting shaft, ensuring that the door panel stops promptly when it is opened to its maximum extent and does not swing back and forth due to the inertia of the door panel.

[0034] Example 2:

[0035] See Figure 1-10 As shown, this embodiment discloses a hinge, including a base 1, a hinge cup 4, and a linkage mechanism 5. The linkage mechanism 5 includes a main swing rod 6 and a secondary swing rod 7. One end of the main swing rod 6 and the secondary swing rod 7 is connected to the hinge arm 3, and the other end is connected to the hinge cup 4 through a hinge cup connecting shaft, so that the hinge arm 3, the main swing rod 6, the hinge cup 4, and the secondary swing rod 7 form a swingable four-bar linkage mechanism; wherein, the main swing rod 6 is the swing rod of Embodiment 1.

[0036] Further refining the above scheme, the hinge cup connecting shaft includes a third connecting shaft and a fourth connecting shaft. The hinge arm 3 is U-shaped with an open lower end. A first connecting hole 31 and a second connecting hole 32 are provided on both sides of the front end of the U-shape, with the second connecting hole 32 located below and behind the first connecting hole 31. The hinge arm 3 is connected to the main swing rod 6 through the first connecting hole 31 and to the lower rear part of the auxiliary swing rod 7 through the second connecting hole 32. The hinge cup 4 is provided with a third connecting hole 41 and a fourth connecting hole 42. The main swing rod 6 and the auxiliary swing rod 7 are connected to the hinge arm 3 respectively through the hinge arm connecting end. The hinge cup connecting end of the main swing rod 6 is connected to the third connecting hole 41 of the hinge cup 4 through the third connecting shaft 43, and the hinge cup connecting end of the auxiliary swing rod 7 is connected to the fourth connecting hole 42 through the fourth connecting shaft 44.

[0037] According to a further optimization of the above scheme, the third connecting hole and the fourth connecting hole of the hinge cup are connected in series by a U-shaped pin, and the third connecting shaft 43 and the fourth connecting shaft 44 are respectively one leg of the U-shaped pin.

[0038] Further optimization of the above scheme: the hinge arm connection end of the main swing arm 6 is connected to the first connection hole 31 through the first connecting shaft 66, and the hinge arm connection end of the auxiliary swing arm 7 is connected to the second connection hole 32 through the second connecting shaft 45.

[0039] Further optimization of the above scheme also includes a buffer mechanism, which is located on the base 1 and is linked to the base 1.

[0040] Further optimizing the above scheme, the buffer mechanism includes an elastic element, which comprises a hollow shaft connection portion, a first pressure arm 812 extending outward from one end of the shaft connection portion, and a second pressure arm 813 extending outward from the other end of the shaft connection portion. A V-shaped structure is formed between the first pressure arm 812, the shaft connection portion, and the second pressure arm 813. The first hinge fulcrum is connected to the hinge arm 3 via a first connecting shaft 66. The elastic element is sleeved on the first connecting shaft 66 via the shaft connection portion, and abuts against the inner cavity top wall of the hinge arm 3 via the first pressure arm 812, and abuts against the auxiliary rocker arm 7 via the second pressure arm 813. Thus, when the hinge switches from a closed state to an open state, it compresses and stores energy to absorb impact force, and when the hinge switches from an open state to a closed state, it opens and releases pressure.

[0041] Further optimizing the above scheme, the buffer mechanism includes an elastic element, and the top pressure shaft 82 is mounted on the upper rear side of the auxiliary swing arm 7 through a mounting hole. The second pressure arm 813 of the elastic element abuts against the top pressure shaft 82 and is compressed or expanded as the auxiliary swing arm 7 swings. The top pressure shaft 82 changes the position of its contact point with the second pressure arm 813 by rotation. In this scheme, the second pressure arm 813 contacts the cylindrical surface of the top pressure shaft 82. During the hinge rotation, the top pressure shaft 82 rotates to change the force point of the elastic element, realizing the compression and storage of force and the release of pressure of the elastic element. The relationship between the length of the pressure arm of the elastic element and the position of the top pressure shaft 82 constitutes a balance relationship between the elastic force of the elastic element and the weight of the door panel within a certain angle range, thereby realizing the suspension at any position within the range of 30-90 degrees of door opening, which is convenient for users. When the auxiliary rocker arm 7 swings from the closed state to the open state, the top pressure shaft 82 moves along an arc trajectory, causing the contact point between it and the second pressure arm 813 to move downward along the circumferential surface of the top pressure shaft 82; this movement causes the degree of pressure on the second pressure arm 813 by the top pressure shaft 82 (or the amount of compression deformation of the elastic element 81) to continuously increase, forcing the V-shaped elastic element 81 to further compress and store energy, thus achieving the gradual absorption of the opening kinetic energy.

[0042] Further optimizing the above scheme, the end of the first pressure arm 812 is provided with an outwardly protruding bent portion 814, through which the first pressure arm 812 abuts against the top wall of the hinge arm 3. In this scheme, by adding the bent portion 814, the force curve of the spring under different opening and closing angles is changed, ensuring a weak balance between the spring force and the weight of the door panel, thereby achieving suspension at any position within the range of 30-90 degrees of door opening. At the same time, changing to a bent shape helps to reduce the angle of each compression operation of the spring, reduce the spring's workload, and improve the spring's service life.

[0043] Further optimization of the above scheme involves a buffer mechanism including a hydraulic cylinder 83. The hydraulic cylinder 83 is compressed when the hinge is in the closed position and stretched when the hinge is in the open position. This scheme utilizes a two-stage elastic-hydraulic buffer system to manage kinetic energy throughout the entire opening and closing stroke: During the opening phase, the elastic element 81 compresses and stores energy, providing a 30-90° stepless hover, while the hydraulic cylinder 83 stretches to temporarily store residual kinetic energy; during the closing phase, the elastic element releases energy to assist in the smooth start of the door, and the hydraulic cylinder 83 powerfully compresses and dissipates energy at the end, eliminating the impact of closing. This dual-buffer synergy reduces the door panel's movement speed by more than 40%, and there is no rebound phenomenon in either the fully open or fully closed position.

[0044] Further optimization of the above scheme involves connecting the rear middle part of the auxiliary swing arm 7 to the buffer mechanism.

[0045] Further optimizing the above scheme, the rear of the secondary swing arm 7 is provided with a driving protrusion 71. The buffer mechanism is connected to the secondary swing arm 7 via a transmission mechanism 9. The transmission mechanism 9 includes a first transmission arm 91 and a second transmission arm 92. The upper ends of the first transmission arm 91 and the second transmission arm 92 are hinged to each other, forming an openable V-shaped structure. The lower end of the first transmission arm 91 is hinged to the movable end of the buffer mechanism, and the lower end of the second transmission arm 92 is hinged to the driving protrusion 71 of the secondary swing arm 7. This allows the V-shaped structure to fold or extend under the drive of the driving protrusion 71 of the secondary swing arm 7, while simultaneously stretching or compressing the buffer mechanism. In this scheme, when the hinge is in the open state, the hinge cup 4 is parallel to the base 1, and the driving protrusion 71 pushes the V-shaped structure to fold, and the movable end of the buffer mechanism is stretched; when the hinge changes to the closed state, the hinge cup 4 and the base 1 change from parallel to perpendicular, the front end of the auxiliary swing rod 7 swings downward, and the driving protrusion 71 moves to unfold the V-shaped structure, thereby compressing the movable end of the buffer mechanism towards its main body.

[0046] According to further optimization of the above scheme, the first transmission arm 91 is provided with a fulcrum in the middle, which is connected to both sides of the hinge arm through the fulcrum. Its two ends can swing around the fulcrum. When the transmission mechanism 9 is folded, its lower end swings to the front side of the fulcrum, so that the moving end of the hydraulic cylinder is stretched forward synchronously. Conversely, it swings to the rear side of the fulcrum, so that the moving end is compressed backward.

[0047] Further optimization of the above scheme includes a fixed base 2 for the base 1. The fixed base 2 includes a hinge arm connecting part 21 adapted to the hinge arm 3 and a cabinet connecting part 22 connected to both sides of the hinge arm connecting part 21. The buffer mechanism is located inside the hinge arm connecting part 21 and is connected to the hinge arm connecting part 21 through an installation structure.

[0048] Further optimizing the above scheme, the mounting structure includes a guide shaft 23 disposed on the rear side of the buffer mechanism. Both ends of the guide shaft 23 are slidably engaged with linear guide grooves 24 disposed on both sides of the hinge arm connection portion 21.

[0049] Compared with the prior art, in this invention, the hinge switches between the closed and open states by flipping the hinge cup 4. During this process, the hinge cup connecting shaft moves upward and backward relative to the main swing rod 6; when the door is opened to about 90°, the edge of the inverted structure contacts the axial surface of the hinge cup connecting shaft, generating resistance and preventing the door panel from opening quickly to the maximum angle. Furthermore, when the hinge is opened to the maximum angle, the inverted structure and the hinge cup connecting shaft lock together, ensuring that the door panel stops in time when it is opened to its maximum extent, preventing it from swinging back and forth due to the inertia of the door panel.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A rocker arm for a door hinge, characterized in that, It includes a swing arm body and side wings extending downward along both sides of the swing arm body. The front end of the side wing is provided with a first hinge fulcrum, and the rear end is provided with a second hinge fulcrum. The side wing is provided with an inverted buckle structure.

2. The pendulum rod according to claim 1, characterized in that, The side wings include a front wing with a flat bottom and a rear wing that extends downward from the front wing. The inverted structure includes a buffer guide groove provided on the front wing with its opening facing backward. The front end of the buffer guide groove is arc-shaped, and the rear end extends through the front wing to the rear wing. A buffer pressure part is formed between the lower end of the buffer guide groove and the bottom of the front wing.

3. A hinge, characterized in that, It includes a base, a hinge cup, and a linkage mechanism. The linkage mechanism includes a main swing rod and a secondary swing rod. One end of the main swing rod and the secondary swing rod are connected to the hinge arm, and the other end is connected to the hinge cup through the hinge cup connecting shaft, so that the hinge arm, the main swing rod, the hinge cup, and the secondary swing rod form a swingable linkage mechanism. The main pendulum is the pendulum as described in claim 1 or 2.

4. The hinge according to claim 3, characterized in that, It also includes a buffer mechanism, which is located on the base and is linked to the base.

5. The hinge according to claim 4, characterized in that, The buffer mechanism includes an elastic element, which includes a hollow shaft connection portion, a first pressure arm extending outward from one end of the shaft connection portion, and a second pressure arm extending outward from the other end of the shaft connection portion. A V-shaped structure is formed between the first pressure arm, the shaft connection portion, and the second pressure arm. The first hinge fulcrum is connected to the hinge arm through a first connecting shaft. The elastic element is sleeved on the first connecting shaft through the shaft connection portion and abuts against the inner cavity top wall of the hinge arm through the first pressure arm, and abuts against the auxiliary swing rod through the second pressure arm.

6. The hinge according to claim 4, characterized in that, The buffer mechanism includes a hydraulic cylinder that is compressed when the hinge is in the closed state and stretched when the hinge is in the open state.

7. The hinge according to claim 6, characterized in that, The rear middle part of the auxiliary swing arm is connected to the buffer mechanism.

8. The hinge according to claim 7, characterized in that, The rear of the auxiliary swing arm is provided with a driving protrusion; the buffer mechanism is connected to the auxiliary swing arm by a transmission mechanism; the transmission mechanism includes a first transmission arm and a second transmission arm; the upper ends of the first transmission arm and the second transmission arm are hinged to each other to form an openable V-shaped structure; the lower end of the first transmission arm is hinged to the movable end of the buffer mechanism, and the lower end of the second transmission arm is hinged to the driving protrusion of the auxiliary swing arm; thereby, the V-shaped structure folds or extends under the drive of the driving protrusion of the auxiliary swing arm, and at the same time drives the buffer mechanism to stretch or compress.

9. The hinge according to claim 8, characterized in that, The base also includes a fixed base; the fixed base includes a hinge arm connecting part adapted to the hinge arm and a cabinet connecting part connected to both sides of the hinge arm connecting part, and the buffer mechanism is located on the inner side of the hinge arm connecting part, which is connected to the hinge arm connecting part through an installation structure.

10. The hinge according to claim 9, characterized in that, The mounting structure includes a guide shaft disposed on the rear side of the buffer mechanism; the two ends of the guide shaft are respectively slidably engaged with linear guide grooves disposed on both sides of the hinge arm connection.

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