Transmission link and hinge

Abstract

This utility model belongs to the technical field of cabinet accessories, specifically relating to a transmission link and hinge, including a link body and a base hinge end, a hinge cup hinge end, and a buffer connection part disposed on the link body. The link body has a low-curvature arc design. The base hinge end and the hinge cup hinge end are respectively disposed at one end of opposite ends of the link body. The buffer connection part is disposed on the lower side of the link body and near the base hinge end. This structure connects to the connecting arm and hinge cup of the cabinet door hinge through the base hinge end and the hinge cup hinge end. The buffer connection part is linked to the buffer device, so that when the active arm swings, it drives the buffer device to reciprocate horizontally. The low-curvature arc design effectively reduces the height of the body and reduces the space occupied by the hinge installation. The hinge of this utility model uses the transmission link of the above-mentioned solution.

Description

Technical Field

[0001] This utility model belongs to the technical field of locker accessories, specifically relating to a transmission link and hinge. Background Technology

[0002] In cabinet door hinges, the common structure mainly consists of a base assembly, a hinge cup, and a four-bar linkage. The four-bar linkage is the core component for achieving smooth opening and closing of the door, and its structural design directly affects the door's movement trajectory, load-bearing capacity, and spatial adaptability. In the four-bar structure of the door hinge, the core components consist of a frame (fixed rod), a connecting rod (swing rod), and a connecting rod (floating rod): the frame, as the fixed rod, refers to the connecting arm on the base that is fixed to the cabinet side panel by screws, and it has two high-precision hinge fulcrums (A, B) near the hinge cup end, forming the fixed rotation axis of the four-bar linkage; the connecting rod includes the main and auxiliary swing rods. The main swing arm is an L-shaped curved arm forged from high-strength alloy, while the secondary swing arm is a straight arm structure, connecting the frame fulcrum B and the hinge cup fulcrum D. The connecting rod, i.e., the hinge cup body, serves as the door mounting base and is connected to the swing arm through fulcrums C and D. The distance between its fulcrums (CD) and the distance between the frame fulcrums (AB) together form the key geometric parameters of the mechanism's kinematics, ensuring the precise trajectory and mechanical stability of the door's opening and closing. Its L-shaped bending angle (usually 90°-120°) and the length of the curved arm together determine the radial displacement of the door at the initial opening stage. The short end of the L-shaped arm connects to the frame fulcrum A, and the long end extends to the hinge cup fulcrum C. The bend creates clearance space, allowing the swing arm to rotate around the cabinet side wall during opening and closing. The L-shaped design of the main swing arm means that it needs to occupy a certain height space on the connecting wall when the door is opened. If the hinge is integrated with the buffer design, the upper side of the main swing arm needs to be designed with a corresponding connecting part to match the buffer. The connection structure between the main swing arm and the buffer device is conical and protrudes upward, which further increases the height space it occupies.

[0003] The existing cabinet base assembly uses a protruding sidewall structure design. While its 10-20mm overhang provides space for door rotation, it has limitations: the abrupt vertical geometric change disrupts the streamlined profile of the cabinet sidewall, affecting the overall aesthetic appeal; the protruding component interferes with daily use, easily causing hard contact with human limbs or surrounding objects; and it doesn't fully utilize the cabinet's depth space, leaving room for structural optimization. If the protruding base assembly design is changed to a flat, recessed design, the structure of the main swing arm needs to be adapted to avoid the L-shaped main swing arm requiring significant height space on the connecting arm when the hinge is open, thus hindering the flattening design of the connecting arm. Utility Model Content

[0004] The first objective of this invention is to overcome the problems caused by the L-shaped design of the transmission link, which results in the base assembly protruding from the side wall of the cabinet, and to provide a transmission link for hinges.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A transmission link includes a link body and a base hinge end, a hinge cup hinge end, and a buffer connection part disposed on the link body. The link body has a low curvature arc design. The base hinge end and the hinge cup hinge end are respectively disposed at one end of opposite ends of the link body. The buffer connection part is disposed on the lower side of the link body and close to the base hinge end.

[0007] The transmission link of this invention can be used as a secondary link in cabinet door hinges. This transmission link connects to the hinge arm via the base hinge end and to the hinge cup via the hinge cup hinge end. Simultaneously, its lower buffer connection can connect to a buffer device, allowing the buffer device to be horizontally positioned behind the transmission mechanism. When the transmission link swings, it drives the buffer device to perform horizontal reciprocating motion. This innovative structure provides a new design concept for existing hinges: due to the low-curvature arc design of the link body, the overall shape tends to be flat, which not only reduces the height specification but also reduces the space occupied by the hinge arm, thus enabling a flatter overall hinge design. It should be noted that the base hinge end, the hinge cup hinge end, and the buffer connection all have corresponding connection points.

[0008] Furthermore, the buffer connection includes two connecting seats arranged opposite each other, forming a connection space between the two connecting seats, and the two connecting seats are offset on the left side of the connecting rod body.

[0009] Furthermore, the angle between the hinge end of the base and the hinge end of the hinge cup is 5°, so that the entire connecting rod body has a low curvature arc shape.

[0010] Furthermore, the upper end of the transmission link near the hinge cup hinge end is provided with a positioning arc surface. This positioning arc surface is used to cooperate with the large corner link; when the cabinet door is closed, the large corner link rests against the positioning arc surface.

[0011] This utility model discloses a hinge, including a base assembly, a hinge cup, and a transmission mechanism. The transmission mechanism includes a swing mechanism and a buffer device. The buffer device includes a horizontally arranged transmission arm, a buffer cylinder, and a slider. The front and rear ends of the slider are respectively connected to the buffer cylinder and the transmission arm. The swing mechanism includes the aforementioned transmission link. The transmission arm is connected to the buffer connection. When the swing mechanism swings around the connecting fulcrum, it drives the slider to perform horizontal reciprocating motion through the transmission arm, causing the slider to selectively trigger the buffer cylinder. Compared with the prior art, this utility model applies the transmission link of the above-mentioned solution. Furthermore, by arranging the buffer cylinder, slider, and other components horizontally, a compact horizontal transmission scheme is formed, significantly reducing the overall height of the hinge.

[0012] Furthermore, the swing mechanism also includes a large-angle connecting rod, with one end of the large-angle connecting rod serving as a base hinge end and the other end as a hinge cup hinge end. The base assembly, the large-angle connecting rod, the transmission connecting rod, and the hinge cup are connected to form a four-bar linkage. The two base hinge ends are distributed front to back and are nearly flush in height. In this design, the four-bar linkage has two states: open and closed. When open, the hinge cup hinge end of the large-angle connecting rod is located below the hinge cup hinge end of the large-angle connecting rod; when closed, the hinge cup hinge end of the large-angle connecting rod is located below the hinge cup hinge end of the transmission connecting rod.

[0013] Furthermore, the base assembly includes a base body, a connecting arm, and an outer cover. The base body has a base receiving portion and a mounting structure. The base body is fixedly connected to the cabinet through the mounting structure. The connecting arm is slidably mounted on the base receiving portion. The transmission mechanism is located on the connecting arm. The connecting arm is connected to the hinge cup through the swing mechanism. The outer cover is located on the base body. This solution is an overall structural design scheme for the base assembly.

[0014] Furthermore, it also includes a drive mechanism, which is located on one side of the connecting arm, and the buffer device is located on the other side. The side of the buffer device abuts against the drive end of the drive mechanism. When subjected to backward pressure, the buffer device moves backward as a whole and triggers the drive mechanism, so that the drive mechanism provides a driving force for the buffer device to move backward.

[0015] Furthermore, the base receiving portion is formed by a recess in the base body, and the front end of the base receiving portion is open. The connecting arm includes a receiving portion and a swing arm connecting portion. The receiving portion is designed as a U-shaped structure adapted to the base receiving portion, and a hinge arm receiving groove is formed on its inner side. The buffer device is disposed in the hinge arm receiving groove. The swing arm connecting portion protrudes from the front end of the receiving portion and is used for connecting the swing mechanism. In this solution, the base receiving portion is formed by a recess in the base, and its opening is located at the upper end and the front end. In this way, the side wall of the cabinet can be pre-set in the groove adapted to the base receiving portion, which can further reduce the height of the cabinet door connecting device protruding from the base. In this solution, the base receiving portion has its opening located at the upper end and the front end. This design allows the side wall of the cabinet to be pre-set in the groove adapted to the base receiving portion. Placing the base receiving portion in the groove further reduces the height of the cabinet door connecting device protruding from the base. At the same time, the nested structure of the U-shaped hinge arm receiving groove of the connecting arm and the base receiving portion can distribute the weight of the door to the groove of the cabinet side wall, reducing local stress concentration.

[0016] Furthermore, a ramp is provided on the upper side of the transmission arm, the height of which gradually decreases from back to front, thereby forming a clearance space, and the base hinge end of the connecting rod body is located above this ramp. Attached Figure Description

[0017] Figure 1 Schematic diagram of the transmission link Figure 1 ;

[0018] Figure 2 Schematic diagram of the transmission link Figure 2 ;

[0019] Figure 3 Schematic diagram of the transmission link Figure 3 ;

[0020] Figure 4 This is a reference diagram showing the use of the transmission linkage when the hinge is open.

[0021] Figure 5 This is a reference diagram showing the use of the transmission linkage when the hinge is closed.

[0022] Figure 6 This is a schematic diagram of the transmission mechanism in the closed state. Figure 1 ;

[0023] Figure 7 This is a schematic diagram of the transmission mechanism in the closed state. Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the transmission mechanism in the closed state. Figure 3 ;

[0025] Figure 9 This is a schematic diagram of the transmission mechanism in the closed state. Figure 4 ;

[0026] Figure 10 Assembly of the slider and the swing mechanism in the open state Figure 1 .

[0027] Figure 11 Assembly of the slider and the swing mechanism in the open state Figure 2 .

[0028] Figure 12 This is a schematic diagram of the sunken hinge in the open position.

[0029] Figure 13 This is an exploded view of the sunken hinge in the closed state.

[0030] Figure 14 Schematic diagram of the connecting arm structure Figure 1 .

[0031] Figure 15 Schematic diagram of the connecting arm structure Figure 2 .

[0032] Figure 16 This is an assembly diagram of the buffer device and drive mechanism in the open state.

[0033] Figure 17 This is an exploded view of the base and connecting arm.

[0034] Figure 18 This is a schematic diagram of a recessed hinge in the closed state.

[0035] Figure 19 This is a schematic diagram of a sunken hinge in the closed state.

[0036] Figure 20 This is a schematic diagram of the recessed hinge in the closed state (outer cover not shown);

[0037] Figure 21 This is a schematic diagram of the slider.

[0038] Figure 22 A breakdown diagram of the slider Figure 1 ;

[0039] Figure 23 A breakdown diagram of the slider Figure 2 .

[0040] Label Explanation:

[0041] 1. Recessed hinge; 11. Hinge cup; 2. Transmission mechanism; 3. Swinging mechanism; 31. Large corner connecting rod; 311. Connecting rod body; 312. First arm section; 313. Second arm section; 314. Positioning corner; 32. Connecting rod body; 321. Third arm section; 322. Fourth arm section; 323. Positioning arc surface; 324. Base connecting end (31a, 32a); Hinge cup connecting end (31b, 32b); 325. Buffer connecting end; 4. Buffer device; 41. Slider; 43. Groove; 44. Connecting shaft; 45. Reinforcing block; 451. First connecting wall; 451a. Pressure bearing groove; 452. Second connecting wall; 452a. Third hinge shaft hole; 453. Third connecting wall; 46. Housing; 461. First mounting groove; 462. Second mounting groove; 463. Third mounting groove; 464. 47. Transmission arm; 48. Buffer cylinder; 5. Base assembly; 50. Base body; 51. Mounting structure; 511. Outer flange; 52. Clearance opening; 512. Third mounting hole; 53. Base receiving part; 6. Connecting arm; 61. Receiving part; 62. Swing rod connecting end; 613. Hinge arm receiving groove; 611. Drive mounting area; 612. Buffer mounting area; 614. Mounting shaft; 616. Elastic mounting part; 615. First positioning groove; 617. Buffer mounting part; 631. Guide groove; 632. Guide hole; 633. Guide shaft pin; 641. Connecting rod; 642. Limiting hole; 7. Drive mechanism; 7. Elastic element; 71. First drive rod; 72. Second drive rod; 73. V-shaped rocker mechanism; 74. Support frame; 8. First support part; 81. Second support part; 82. First mounting hole; 83. Second mounting hole; 84. Outer cover; 9. Detailed Implementation

[0042] The specific embodiments of this utility model are described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do 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, and therefore should not be construed as a limitation of this utility model.

[0043] Example 1:

[0044] See Figures 1-5 As shown, this utility model discloses a transmission link, including a link body 32 and a base hinge end 32a, a hinge cup hinge end 32b and a buffer connection part disposed on the link body. The link body has a low curvature arc design. The base hinge end 32a and the hinge cup hinge end 32b are respectively disposed at one end of the front and rear ends of the link body. The buffer connection part is disposed at the lower end of the link body located near the base hinge end 32a.

[0045] The aforementioned buffer connection 325 includes two connecting seats arranged opposite each other, forming a connection space between the two connecting seats, and the two connecting seats are offset on the left side of the connecting rod body 32.

[0046] See Figure 2 As shown, the angle between the base hinge end 32a and the hinge cup hinge end 32b is 5°, so that the entire connecting rod body 32 has a low curvature arc shape.

[0047] The aforementioned connecting rod body includes a third arm 322 connected to the hinge end 32a of the base and a fourth arm 323 connected to the hinge cup hinge end 32b. The rear ends of the third arm 322 and the fourth arm 323 are connected, and a buffer connection is provided at the lower end of the third arm 322. The length of the third arm 322 is less than the length of the fourth arm 323. Since the connecting rod body is generally in a low-curvature arc shape, its overall shape tends to be flat, thereby reducing its height specification and reducing the space occupied by the hinge arm.

[0048] The upper end of the aforementioned transmission link near the hinge cup hinge end 32b is provided with a positioning arc surface 324. The positioning arc surface 324 in this design is used to cooperate with the large corner link 31. When the cabinet door is closed, the large corner link 31 is located abutting against the positioning arc surface 324.

[0049] The transmission linkage of this utility model can be applied to cabinet door hinge 1. It is connected to the connecting arm 6 and hinge cup 11 of the hinge through the base hinge end and the hinge cup hinge end, respectively. It can also be connected to the buffer device 4 through the buffer connection part, so that when the active arm swings, it drives the buffer device 4 to perform horizontal reciprocating motion. Since the linkage body is generally low-curvature arc-shaped, its overall shape tends to be flat, thereby reducing its height specification and reducing the space occupied by the hinge arm.

[0050] Example 2:

[0051] See Figures 1-23As shown, this utility model discloses a hinge 1, including a base assembly 5, a hinge cup 11, and a transmission mechanism 2. The transmission mechanism 2 includes a swing mechanism 3 and a buffer device 4. The buffer device 4 includes a horizontally arranged transmission arm 47, a buffer cylinder 48, and a slider 41. The front and rear ends of the slider 41 are respectively connected to the buffer cylinder 48 and the transmission arm 47. The swing mechanism 3 includes a transmission link, and the transmission arm 47 is connected to the buffer connection part. When the swing mechanism 3 swings around the connecting fulcrum, the transmission arm 47 drives the slider 41 to perform horizontal reciprocating motion and causes the slider 41 to selectively trigger the buffer cylinder 48. The swing mechanism 3 also includes a large-angle link 31. One end of the large-angle link 31 is set as the base hinge end 31a, and the other end is set as the hinge cup hinge end 31b. The base assembly 5, the large-angle link 31, the link body 32, and the hinge cup 11 are connected to form a four-bar linkage. The two base hinge ends (31a, 32a) are distributed front to back and are nearly flush in height. In this design, the four-bar linkage has two states: open and closed. When open, the hinge cup hinge end 31b of the large corner link 31 is located below the hinge cup hinge end 32b of the large corner link 31; when closed, the hinge cup hinge end 31b of the large corner link 31 is located below the hinge cup hinge end 32b of the transmission link.

[0052] The aforementioned base assembly 5 includes a base body 50, a connecting arm 6, and an outer cover 9. The base body 50 has a base receiving portion 53 and a mounting structure 51. The base body 50 is fixedly connected to the cabinet through the mounting structure 51. The connecting arm 6 is slidably mounted on the base receiving portion 53. The transmission mechanism 2 is located on the connecting arm 6. The connecting arm 6 is connected to the hinge cup 11 through a swing mechanism 3. The outer cover 9 is located on the base body 50. This scheme is the overall structural design scheme for the base assembly 5.

[0053] In one embodiment, a drive mechanism 7 is also included. The drive mechanism 7 is located on one of the left and right sides of the connecting arm 6, and the buffer device 4 is located on the other side. The side of the buffer device 4 abuts against the drive end of the drive mechanism 7. After being subjected to rearward pressure, the buffer device 4 moves backward as a whole and triggers the drive mechanism 7, so that the drive mechanism 7 provides a driving force for the buffer device 4 to move backward.

[0054] The aforementioned drive mechanism 7 includes an elastic element 71, a first drive rod 72, and a second drive rod 73. The left and right sides of the hinge arm receiving groove 613 are respectively set as a drive mounting area 611 and a buffer mounting area 612. The front part of the drive mounting area 611 is provided with an inclined elastic mounting part 616, and the elastic mounting part 616 is provided with a first positioning groove 615. The middle part of the drive mounting area 611 is provided with a mounting shaft 614. One end of the first drive rod 72 and the second drive rod 73 is hinged to form a V-shaped rocker mechanism 74, and the bottom of the linkage mechanism 74 is its drive part. The elastic element 71 is sleeved on the second drive rod 73. The slider 41 is adapted to the drive part and is provided with a pressure-bearing groove 451a. The drive part abuts against the rear side wall of the slider 41, and the pressure-bearing groove 451a is located on the front side of its drive part.

[0055] The aforementioned base receiving portion 53 is formed by a recess in the base body 50, and the front end of the base receiving portion 53 is open. The connecting arm 6 includes a receiving portion 61 and a swing arm connecting portion 62. The receiving portion 61 is designed as a U-shaped structure adapted to the base receiving portion 53, and a hinge arm receiving groove 613 is formed on its inner side. The buffer device 4 is disposed in the hinge arm receiving groove 613. The swing arm connecting portion 62 protrudes from the front end of the receiving portion 61 and is used for connecting the swing mechanism. In this solution, the base receiving portion 53 is formed by a recess in the base, and its opening is located at the upper end and the front end. In this way, the side wall of the cabinet can be pre-set in the groove adapted to the base receiving portion 53, which can further reduce the height of the cabinet door connecting device protruding from the base. In this solution, the base receiving portion 53 has its opening located at the upper end and the front end. This design allows the side wall of the cabinet to be pre-set in the groove adapted to the base receiving portion 53. Placing the base receiving portion 53 in the groove further reduces the height of the cabinet door connecting device protruding from the base. Meanwhile, the nested structure of the U-shaped hinge arm receiving groove 613 of the connecting arm 6 and the base receiving part 53 can distribute the weight of the door to the groove on the side wall of the cabinet, reducing local stress concentration.

[0056] The upper side of the aforementioned transmission arm 47 is provided with a ramp, the height of which gradually decreases from back to front, thereby forming a clearance space, and the base hinge end of the connecting rod body is located above this ramp.

[0057] The first swing arm 31 mentioned above has a positioning corner 314 that bends downward and backward on the side near the hinge cup hinge end 31b;

[0058] The front end of the slider 41 is provided with a recess 43, and a connecting shaft 44 is provided at the recess 43. One end of the transmission arm 47 is sleeved on the connecting shaft 44.

[0059] The aforementioned slider 41 includes a reinforcing block 45 and a housing 46. The pressure-bearing groove 451a, the recess 43, and the sliding plane are disposed on the housing 46. The reinforcing block is embedded in the housing 46, and the housing 46 has a groove to accommodate the reinforcing block. The housing 46 is made of plastic. In this design, the housing 46 is made of plastic and has a groove to accommodate the reinforcing block, ensuring a tight fit between the two. The plastic material has a low coefficient of friction, which reduces frictional resistance between the slider and the connecting arm 6 and the drive mechanism 7 during slider movement, reducing noise and energy loss, making the slider's movement smoother, and improving transmission efficiency.

[0060] The aforementioned reinforcing block 45 is a precision-cast metal part. In this design, the reinforcing block is made of precision-cast metal, which has high strength and can withstand large forces and stresses, ensuring the structural stability of the slider during reciprocating motion and preventing deformation or damage, thereby improving the reliability and service life of the entire hinge transmission structure.

[0061] The aforementioned reinforcing block includes a first connecting wall 451, a second connecting wall 452, and a fourth connecting wall 454. The lower ends of the second connecting wall 452 and the fourth connecting wall 454 are respectively connected to one side of the front end of the first connecting wall 451 and are provided with corresponding hinge shaft holes. The lower end of the third connecting wall 453 is connected to the rear end of the first connecting wall 451. The outer shell 46 is provided with a first mounting groove 461, a second mounting groove 462, and a fourth mounting groove 464 to cooperate with the first connecting wall 451, the second connecting wall 452, and the fourth connecting wall 454. The second mounting groove 462 is located on one side of the groove 43.

[0062] The shape of the aforementioned positioning corner 314 is adapted to the hinge cup hinge end 32b of the connecting rod body 32, and the sum of the lengths of the fourth arm 323 and the hinge cup hinge end 32b of the connecting rod body 32 is equal to the length of the second arm 313.

[0063] The aforementioned base assembly 5 also includes a support frame 8, which is located on the lower side of the base body 50. The outer side of the base body 50 protrudes radially from the support frame 8 to form a connecting recess. The side edge of the outer cover is provided with a fastening part, which fastens into the connecting recess, so that the base body 50 and the outer cover are connected.

[0064] The aforementioned support frame 8 includes two opposing first support portions 81 and a second support portion 82 connected between the two first support portions 81. The first support portion 81 is provided with a first mounting hole 83 and a second mounting hole 84 for connecting with the cabinet. The mounting structure 51 includes an outward flange 511 provided along both sides of the base receiving portion 53. The outward flange 511 abuts against the first support portion 81. The middle part of the base receiving portion 53 is provided with a clearance opening 52 in conjunction with the middle part of the second support portion 82. The outward flange 511 is provided with a third mounting hole 512. The first mounting hole 83 and the third mounting hole 512 are connected by screws. The middle part of the base body 50.

[0065] The buffer connection parts of the aforementioned transmission arm 47 are connected by a connecting shaft 44, and the other end is provided with an open semi-circular hole. The transmission arm 47 is assembled to the front end of the buffer device 4 through the open semi-circular hole.

[0066] The base hinge end 31a and the hinge cup hinge end 31b of the aforementioned large corner connecting rod are axial. The base hinge end 31a and the hinge cup hinge end 31b are connected by a first connecting rib 311. The first connecting rib 311 includes a first arm 312 connected to the fixed end 31a and a second arm 313 connected to the swing end 31b. The front end of the first arm 312 is connected to the upper end of the second arm 313 to form a positioning corner 314.

[0067] A linear limiting guide structure is provided between the connecting arm 6 and the base body 50, including a first guide mechanism and a second guide mechanism. The first guide mechanism is located at the front of the connecting arm 6 and the base body 50, and includes a guide groove 631, a guide hole 632 and a guide pin 633. The guide groove 631 is located on the base body 50 along the length direction, and the guide hole 632 is located on the connecting arm 6. The two are connected by the guide pin 633. The second guide mechanism is located at the rear of the connecting arm 6 and the base body 50, and includes a connecting rod 641 and a limiting hole 642. The limiting hole 642 is located on opposite sides of the base body 50. The connecting arm 6 has through holes on both sides to cooperate with the connecting rod 641. The connecting rod 641 is laterally assembled onto the connecting arm 6 through the holes.

[0068] Furthermore, a buffer mounting part 617 is provided at the rear of the hinge arm receiving groove 613, and a second positioning groove is provided on the buffer mounting part 617, and the body of the buffer rod is assembled on the second positioning groove.

[0069] Compared with the prior art, the present invention applies the transmission linkage of the above-mentioned scheme, and by arranging components such as buffer cylinder 48 and slider 41 horizontally, a compact horizontal transmission scheme is formed, which significantly reduces the overall height of hinge 1.

[0070] 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 transmission connecting rod, characterized in that, The linkage body (32) includes a base hinge end (32a), a hinge cup hinge end (32b) and a buffer connection part (325) disposed on the linkage body (32). The linkage body (32) has a low curvature arc design. The base hinge end (32a) and the hinge cup hinge end (32b) are respectively disposed at one end of the opposite ends of the linkage body (32). The buffer connection part (325) is disposed on the lower side of the linkage body (32) and close to the base hinge end (32a).

2. The transmission connecting rod according to claim 1, characterized in that, The buffer connection part (325) includes two connecting seats arranged opposite each other, forming a connection space between the two connecting seats, and the two connecting seats are offset on the left side of the connecting rod body (32).

3. The transmission connecting rod according to claim 1, characterized in that, The included angle between the base hinge end (32a) and the hinge cup hinge end (32b) is 5°, so that the entire connecting rod body (32) is in a low curvature arc shape.

4. The transmission connecting rod according to claim 1, characterized in that, The upper end of the connecting rod body (32) near the hinge end (32b) of the hinge cup is provided with a positioning arc surface (324).

5. A hinge comprising a base assembly (5), a hinge cup (11), and a transmission mechanism (2), characterized in that, The transmission mechanism (2) includes a swing mechanism (3) and a buffer device (4). The buffer device (4) includes a horizontally arranged transmission arm (47), a buffer cylinder (48), and a slider (41). The front and rear ends of the slider (41) are respectively connected to the buffer cylinder (48) and the transmission arm (47). The swing mechanism (3) includes a transmission link according to any one of claims 1-4. The transmission arm (47) is connected to the buffer connection part (325). When the swing mechanism (3) swings around the connection fulcrum, the transmission arm (47) drives the slider (41) to make horizontal reciprocating motion and causes the slider (41) to selectively trigger the buffer cylinder (48).

6. The hinge according to claim 5, characterized in that, The swing mechanism (3) also includes a large corner link (31). One end of the large corner link (31) is set as the base hinge end (31a), and the other end is set as the hinge cup hinge end (31b). The base assembly (5), the large corner link (31), the transmission link and the hinge cup (11) are connected to form a four-bar linkage. The two base hinge ends (31a, 32a) are distributed in front and behind and are close to the same height.

7. The hinge according to claim 5, characterized in that, The base assembly (5) includes a base body (50), a connecting arm (6), and an outer cover (9). The base body (50) is provided with a base receiving part (53) and an installation structure (51). The base body (50) is fixedly connected to the cabinet through the installation structure (51). The connecting arm (6) is slidably mounted on the base receiving part (53). The transmission mechanism (2) is provided on the connecting arm (6). The connecting arm (6) is connected to the hinge cup (11) through the swing mechanism (3). The outer cover (9) is provided on the base body (50).

8. The hinge according to claim 5, characterized in that, It also includes a drive mechanism (7), which is located on one side of the connecting arm (6), and the buffer device (4) is located on the other side. The side of the buffer device (4) abuts against the drive end of the drive mechanism (7). After being subjected to rearward pressure, the buffer device (4) moves backward as a whole and triggers the drive mechanism (7), so that the drive mechanism (7) provides the buffer device (4) with a driving force to move backward.

9. The hinge according to claim 7, characterized in that, The base receiving part (53) is formed by the recess of the base body (50) and the front end of the base receiving part (53) is open. The connecting arm (6) includes a receiving part (61) and a swing arm connecting part (62). The receiving part (61) is designed as a U-shaped structure that is adapted to the base receiving part (53), and a hinge arm receiving groove (613) is formed on its inner side. The buffer device (4) is located in the hinge arm receiving groove (613). The swing arm connecting part (62) protrudes from the front end of the receiving part (61) and is used for connection of the swing mechanism (3).

10. The hinge according to claim 5, characterized in that, The upper side of the transmission arm (47) is provided with a ramp, the height of which gradually decreases from back to front, thereby forming a clearance space. The base hinge end (32a) of the connecting rod body (32) is located above this ramp.

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