Large-angle opening and closing hinge and 155-degree opening and closing hinge

Abstract

The utility model relates to the technical field of hinges, in particular to a 155-degree opening and closing hinge which comprises a hinge cup, a base, a first hinge arm, a second hinge arm, a third hinge arm and a fourth hinge arm, one end of the first hinge arm is hinged to the outward side of the hinge cup, and the two ends of the second hinge arm are hinged to the other end of the first hinge arm and one end of the base respectively. One end of the third hinge arm is hinged to the inward side of the hinge cup, one end of the fourth hinge arm is hinged to the base, the other end of the fourth hinge arm is hinged to the other end of the third hinge arm, the third hinge arm is arranged on the outer side of the first hinge arm and the outer side of the second hinge arm in a sleeving mode, and the side wall of the third hinge arm is hinged to the side wall of the second hinge arm. The buffer is assembled with the first hinge arm and used for elastically buffering the hinge cup, and the spring is assembled with the third hinge arm and used for buffering the fourth hinge arm, so that the buffer is closer to a stress point and is more stable when bearing external force, and the impact between the door plate and the cabinet body is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a large-angle opening and closing hinge and a 155-degree opening and closing hinge. Background Art

[0002] Buffer hinges are hinges with damping devices. Their main function is to slowly close the door panel through damping when the door panel is closed to the last section of the travel, avoiding impact and noise between the door panel and the cabinet. Buffer hinges are widely used in furniture, cabinets and other fields, thus creating a quiet and comfortable home environment.

[0003] Although the buffer hinge has many advantages, it still has certain limitations in practical applications. The opening and closing angle of the common buffer hinges on the market is limited by the structure of the hinge itself. Usually, the opening and closing angle is 90°. However, in special customized designs or usage scenarios, the hinge needs to have a larger opening and closing angle so that the door panel can be fully opened. In order to solve the above technical problems, in the prior art, there is a large-angle buffer hinge with publication number CN108487808B, which includes a hinge cup, a buffer, a hinge arm, a short rod, a long rod and a triangular connector. The hinge cup is hinged to one end of the short rod, and the other end of the short rod is hinged to one end of the long rod. The other end of the long rod is hinged to one end of the long rod. The hinge arm is hinged, the buffer is arranged in the long rod and the end of the buffer is hinged with the short rod and the long rod. The telescopic end of the buffer is hinged with the triangular connector. The triangular connector is provided with a torsion spring and a pulley hinged therewith. The left and right sides of the triangular connector are provided with guide rail grooves. The guide rail grooves are provided with first rivets fixed at both ends on the long rod. The end of the torsion spring is pressed against the first rivet. A small cam is arranged in the hinge arm. The pulley slides on the surface of the small cam. By buckling the end and telescopic end of the buffer on the rivet, a flexible and fast conversion between the buffer hinge and the ordinary hinge is realized. The assembly is convenient, the opening and closing process of the hinge is relatively smooth, and a good buffering effect is achieved.

[0004] With respect to the above-mentioned related technologies, the inventors believe that there are the following defects. First, since the hinge cup of the hinge is directly connected to the door panel, and the base is fixed to the side panel of the cabinet, these two connection areas become the main parts that bear the external force. However, in the prior art, the buffer is placed inside the long rod, which means that the force must first be transmitted to the long rod through the hinge cup before it can play a buffering role, resulting in an unsatisfactory buffering effect, because the buffer cannot play its role in time, and thus cannot effectively reduce the impact when the door panel is closed; secondly, in the prior art, pressure is applied to the first rivet through a torsion spring so that the pulley is always tightly fitted on the surface of the small cam. This structural design is not only complex, but also relatively difficult in the assembly process, which undoubtedly increases the production cost and affects the production efficiency; in addition, since the buffer realizes its function by buckling on the rivet, and when the hinge is opened and closed, relative rotation occurs between the buffer and the rivet. As the number of uses increases, this relative movement may cause the connection between the buffer and the rivet to gradually loosen, and eventually cause the buffer to be completely separated from the rivet, thereby making the buffering effect invalid, reducing the service life of the product, and increasing the frequency and cost of maintenance and replacement. Utility Model Content

[0005] In order to enhance the buffering effect of the large-angle opening and closing hinge and simplify the structure, the present application provides a large-angle opening and closing hinge and a 155° opening and closing hinge.

[0006] In the first aspect, the utility model provides a large-angle opening and closing hinge, including a hinge cup, a base, a first hinge arm, a second hinge arm, a third hinge arm, and a fourth hinge arm, wherein one end of the first hinge arm is hinged to the outward side of the hinge cup, and the two ends of the second hinge arm are respectively hinged to the other end of the first hinge arm and one end of the base, one end of the third hinge arm is hinged to the inward side of the hinge cup, one end of the fourth hinge arm is hinged to the base, and the other end of the fourth hinge arm is hinged to the other end of the third hinge arm, the third hinge arm is sleeved on the outside of the first hinge arm and the second hinge arm, and the side wall of the third hinge arm is hinged to the side wall of the second hinge arm, characterized in that it also includes a buffer and a spring, the buffer is assembled with the first hinge arm and is used to elastically buffer the hinge cup, and the spring is assembled with the third hinge arm and is used to buffer the fourth hinge arm.

[0007] Preferably, when the hinge is in an extended state, the buffer is in a reset state and the spring is in an elastically compressed state; and when the hinge is closed, the buffer is in an elastically compressed state and the spring is in a reset state.

[0008] Preferably, it further comprises a mounting seat, wherein the mounting seat is assembled in the first hinge arm, and the buffer is slidably assembled with the mounting seat, so that when the second hinge arm rotates, the buffer elastically telescopes and slides in the mounting seat.

[0009] Preferably, the mounting seat is provided with a mounting groove for assembling the buffer, the side wall of the buffer cylinder has a protruding first limit block, the first limit block is provided in two groups and is arranged opposite to the side wall of the buffer cylinder, and the inner side wall of the mounting groove is provided with a first recessed portion for adapting to the first limit block.

[0010] Preferably, the inner top wall of the second hinge arm has a protruding first extrusion block, and when the hinge is closed, the first extrusion block abuts against the bottom wall of the cylinder body of the buffer and is used to push the buffer to slide in the installation groove.

[0011] Preferably, an extension portion is provided at one end of the mounting seat away from the mounting groove, the extension portion is hinged to the hinge cup, and the hinge portion between the extension portion and the hinge cup coincides with the hinge portion between the first hinge arm and the hinge cup.

[0012] Preferably, it also includes a sliding seat and a first locking piece, the sliding seat is slidably assembled with the third hinge arm, the first locking piece is assembled with the first hinge arm, the two ends of the spring are respectively connected to the sliding seat and the first locking piece, and the end of the fourth hinge arm close to the third hinge arm abuts against the sliding seat and is used to push the sliding seat to move.

[0013] Preferably, the fourth hinge arm is provided with a second extrusion block, the second extrusion block is arranged at an end close to the third hinge arm, and the second extrusion block is arranged to protrude obliquely downward.

[0014] Preferably, a sliding groove is formed on the top wall of the third hinge arm, and a protruding lug portion is provided on the top wall of the sliding seat, and the lug portion slides in the sliding groove.

[0015] In the second aspect, the utility model provides a hinge that opens and closes at 155°, including the above-mentioned large-angle opening and closing hinge, the fourth hinge arm is hinged to the third hinge arm to form a third hinge, the third hinge arm is hinged to the second hinge arm to form a fourth hinge, the center distance between the third hinge and the second hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D3=(101%~106%)×D1, D2=(60%~65%)×D1.

[0016] The beneficial effects of the utility model are:

[0017] By installing the buffer on the first hinge arm and using it to buffer the force of the hinge cup, the buffer is arranged close to the door panel and closer to the force point. The hinge is more stable when subjected to external force, and the relative movement between components is reduced, which can more effectively mitigate the impact when the door panel is closed, reduce the complex torsion spring and pulley structure, reduce production costs, simplify the assembly process, improve production efficiency, and extend service life. Secondly, through the dual effects of the buffer and the spring, the hinge can provide a smoother and softer buffering effect during the closing process, effectively reducing the impact and noise between the door panel and the cabinet.

[0018] Through the staggered pressure-reset setting of the buffer and the spring, a smooth buffering force can be continuously provided during the opening and closing process of the hinge, effectively reducing the impact between the door panel and the cabinet body, and improving the buffering effect, making the hinge smoother and more stable during the opening and closing process, thereby improving the user experience; secondly, due to the alternating working state of the buffer and the spring, the long-term pressure on a single component is reduced, wear and fatigue are reduced, and the service life of the hinge is extended; thirdly, when the hinge is in the extended state, the spring is in a compressed state, which provides additional support for the door panel, enhances the stability of the door panel, and prevents it from shaking due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereogram of the present application;

[0020] Figure 2 is the main view of this application;

[0021] Figure 3 It is a small curved front view of this application;

[0022] Figure 4 is a cutaway perspective view of the present application;

[0023] Figure 5 is a three-dimensional diagram of the closed state of the present application;

[0024] Figure 6 is a cross-sectional view of the closed state of the present application;

[0025] Figure 7 It is a three-dimensional diagram of the unfolded state of the present application;

[0026] Figure 8 is a cross-sectional view of the application in an expanded state;

[0027] Fig. 9 It is a disassembled stereogram of the present application;

[0028] Fig.10 is a three-dimensional diagram of the sliding seat of the present application;

[0029] Fig.11It is a disassembled stereoscopic view of the spring and the sliding seat of the present application;

[0030] Fig.12 It is the front view of the mounting base of this application;

[0031] Fig.13 It is a disassembled stereoscopic view of the buffer and the mounting seat of the present application;

[0032] Fig.14 is a fourth hinge stereogram of the present application;

[0033] Fig.15 This is the first schematic diagram of the 125° opening and closing device of the present application;

[0034] Fig.16 This is the second schematic diagram of the 125° opening and closing device of the present application;

[0035] Fig.17 This is the third schematic diagram of the 125° opening and closing device of the present application;

[0036] Fig.18 This is the fourth schematic diagram of the 125° opening and closing device of the present application;

[0037] Fig.19 This is the first schematic diagram of the 155° opening and closing device of the present application;

[0038] Fig. 20 This is the second schematic diagram of the 155° opening and closing device of the present application;

[0039] Fig.21 This is the third schematic diagram of the 155° opening and closing device of the present application;

[0040] Fig. 22 This is the fourth schematic diagram of the 155° opening and closing device of the present application. DETAILED DESCRIPTION

[0041] A hinge is a joint where two parts are connected and allowed to rotate relative to each other. It refers to the specific location where two or more objects are connected. When describing the center distance between two hinges, it refers to the distance between the center axes or center points of the two hinges.

[0042] Example 1: Figure 1-14As shown, a large-angle opening and closing hinge includes a hinge cup 1, a base 2, a first hinge arm 301, a second hinge arm 302, a third hinge arm 303, and a fourth hinge arm 304. One end of the first hinge arm 301 is hinged to the outward side of the hinge cup 1, two ends of the second hinge arm 302 are respectively hinged to the other end of the first hinge arm 301 and one end of the base 2, one end of the third hinge arm 303 is hinged to the inward side of the hinge cup 1, one end of the fourth hinge arm 304 is hinged to the base 2, and the other end of the fourth hinge arm 304 is hinged to the other end of the third hinge arm 303. The third hinge arm 303 is sleeved on the outer sides of the first hinge arm 301 and the second hinge arm 302, and the side wall of the third hinge arm 303 is hinged to the side wall of the second hinge arm 302. Through the unique four-arm structure design, the hinge can support the door panel 7 to achieve an opening and closing angle exceeding the traditional 90°, meeting the needs of special customized design or usage scenarios.

[0043] The structure further comprises a buffer 4 and a spring 5 . The buffer 4 is assembled with the first hinge arm 301 and is used for elastically buffering the hinge cup 1 . The spring 5 is assembled with the third hinge arm 303 and is used for buffering the fourth hinge arm 304 .

[0044] The buffer 4 is assembled on the first hinge arm 301 and is used to buffer the force of the hinge cup 1, so that the buffer 4 is arranged close to the door panel 7 and closer to the force point. The hinge is more stable when subjected to external force, and reducing the relative movement between components can more effectively mitigate the impact when the door panel 7 is closed, reduce complex torsion spring and pulley structures, reduce production costs, simplify the assembly process, improve production efficiency, and extend service life. Secondly, through the dual effects of the buffer 4 and the spring 5, the hinge can provide a smoother and softer buffering effect during the closing process, effectively reducing the impact and noise between the door panel 7 and the cabinet.

[0045] During the opening and closing process of the hinge, with regard to the specific state changes of the buffer 4 and the spring 5, when the hinge is in the expanded state, the buffer 4 is in the reset state, and the spring 5 is in the elastically compressed state; when the hinge is closed, the buffer 4 is in the elastically compressed state, and the spring 5 is in the reset state. The buffering effect of the large-angle hinge is improved by the staggered compression and reset of the buffer 4 and the spring 5. The staggered compression and reset design of the buffer 4 and the spring 5 can continuously provide a stable buffering force during the opening and closing process of the hinge, effectively reducing the impact between the door panel 7 and the cabinet body, improving the buffering effect, making the hinge smoother and more stable during the opening and closing process, and improving the user experience; secondly, due to the alternating working state of the buffer 4 and the spring 5, the long-term compression of a single component is reduced, reducing wear and fatigue, thereby extending the service life of the hinge; thirdly, when the hinge is in the expanded state, the spring 5 is in a compressed state, providing additional support for the door panel 7, enhancing the stability of the door panel 7, and preventing it from shaking due to external forces.

[0046] In terms of the specific installation structure of the buffer 4, it also includes a mounting seat 401, which is assembled in the first hinge arm 301. The buffer 4 is slidably assembled with the mounting seat 401. When the second hinge arm 302 rotates, the buffer 4 elastically telescopically slides in the mounting seat 401, thereby improving the stability of the installation of the buffer 4 and ensuring the effectiveness and stability of the buffering effect. Through the design of the mounting seat 401, the buffer 4 can be stably assembled in the first hinge arm 301, reducing the possibility of displacement or loosening of the buffer 4 due to external force, thereby ensuring the stability of the installation of the buffer 4; secondly, the elastic telescopic sliding of the buffer 4 in the mounting seat 401 can more effectively respond to the rotation of the second hinge arm 302 and the force from the hinge cup 1, providing a more precise and effective buffering effect, thereby improving the overall buffering effect and improving the overall performance of the hinge product.

[0047] Specifically, the mounting seat 401 and the first hinge arm 301 are assembled through the first connecting pin 601, and the first connecting pin 601 is penetrated through the side wall of the first hinge arm 301 and the side wall of the mounting seat 401, so as to connect the mounting seat 401 with the first hinge arm 301. There are two groups of first connecting pins 601, and the two groups of first connecting pins 601 are arranged at intervals. One group of first connecting pins 601 is located at the upward end of the mounting seat 401, and is used to penetrate the second hinge arm 302, the first hinge arm 301 and the mounting seat 401 in sequence from the outside to the inside. The first connecting pin 601 plays the role of the mounting seat 401 and the first hinge arm 301, and also plays the role of hingedly assembling the first hinge arm 301 and the second hinge arm 302. The two groups of first connecting pins 601 are arranged at intervals to ensure the stability of the connection between the mounting seat 401 and the first hinge arm 301, and prevent the mounting seat 401 from loosening or displacement during use. Since the first connecting pin 601 performs multiple assembly functions at the same time, the assembly process becomes simpler and more efficient, the production cost and assembly difficulty are reduced, the reliability and stability of the hinge are improved, and the hinge is more stable and reliable during use.

[0048] In terms of the specific structure of the sliding assembly of the buffer 4 and the mounting seat 401, the mounting seat 401 is provided with a mounting groove 4011 for assembling the buffer 4, the side wall of the cylinder body of the buffer 4 has a protruding first limit block 402, the first limit block 402 is provided with two groups and is arranged opposite to the side wall of the cylinder body of the buffer 4, the inner side wall of the mounting groove 4011 is provided with a first recessed portion 4012 for adapting the first limit block 402, the push rod of the buffer 4 is connected to the bottom wall of the mounting groove 4011, and the first connecting pin 601 assembled with the first hinge arm 301 and the second hinge arm 302 is used to prevent the buffer 4 from sliding out of the mounting groove 4011, and the first limit block 402 is provided on the side wall of the cylinder body of the buffer 4. Two sets of opposing first limit blocks 402 and corresponding first recessed portions 4012 are provided on the inner wall of the mounting groove 4011 to achieve stable sliding assembly of the buffer 4 and the mounting seat 401. This structure ensures that the buffer 4 does not shake or shift during the sliding process, thereby improving the sliding stability; secondly, the first connecting pin 601 is not only used to connect the first hinge arm 301 and the second hinge arm 302, but also prevents the buffer 4 from slipping, thereby increasing the stability of the hinge assembly and ensuring that the buffer 4 always remains in the correct position during operation; furthermore, the design of the mounting groove 4011 and the first limit block 402 makes the assembly process of the buffer 4 simpler and more intuitive. The staff only needs to align the first limit block 402 of the buffer 4 with the first recessed portion 4012 of the mounting groove 4011, and then push the buffer 4 into the mounting groove 4011, thereby reducing the difficulty of assembly. In addition, due to the stable sliding assembly of the buffer 4 and the mounting seat 401, the buffer 4 can more accurately respond to the rotation of the second hinge arm 302, thereby providing a more precise and effective buffering effect, ensuring that the door panel 7 moves slowly and smoothly when closing, reducing impact and noise.

[0049] Specifically, a second limit block 403 is provided on the bottom surface of the cylinder body of the buffer 4, and the second limit block 403 is provided along the circumferential protrusion of the cylinder body of the buffer 4. The second limit block 403 is provided with an arc surface matched with the outer ring wall of the first connecting pin 601 on the side facing the first connecting pin 601. When the buffer 4 is in the reset state, the second limit block 403 abuts against the first connecting pin 601. When the buffer 4 is in the reset state, the second limit block 403 abuts against the first connecting pin 601. This design can ensure that the buffer 4 remains stable during the reset process and prevent position displacement caused by external force or vibration; secondly, the second limit block 403 is provided along the circumferential protrusion of the cylinder body of the buffer 4 to increase the contact area with the first connecting pin 601, thereby improving the strength of the structure and making the entire hinge system more stable; furthermore, through the abutment between the second limit block 403 and the first connecting pin 601, the telescopic range of the buffer 4 can be limited to prevent damage or failure caused by over-travel of the telescopic range, thereby ensuring the normal operation of the buffer 4.

[0050] Furthermore, the inner wall of the mounting groove 4011 is provided with a second recessed portion 4013 for preventing the second limit block 403 from sliding. The second limit block 403 is located between the two groups of first limit blocks 402. The first limit block 402 and the two groups of second limit blocks 403 form a triangular limit position, thereby improving the stability of the sliding assembly between the buffer 4 and the mounting seat 401 and reducing the direction of deflection when the buffer 4 and the mounting seat 401 are assembled, thereby ensuring that when the buffer 4 is reset, the second limit portion abuts against the first connecting pin 601, thereby improving the stability of the sliding assembly between the buffer 4 and the mounting seat 401 and the resetting accuracy, so that the buffering effect of the door panel 7 during the closing process is smoother and more stable, reducing impact and noise, and providing users with a more comfortable use experience.

[0051] Furthermore, the sliding distance of the first limit block 402 in the first recess 4012 is smaller than the elastic expansion and contraction amount of the push rod of the buffer 4, thereby ensuring that the buffer 4 will not be damaged by overtravel, improving the stability of the buffering effect of the buffer 4, effectively preventing the buffer 4 from being damaged by overtravel during the expansion and contraction process, and protecting the structure and function of the buffer 4.

[0052] In order to enable the second hinge arm 302 to better extrude the bottom wall of the cylinder of the buffer 4, thereby achieving a buffering effect, the inner top wall of the second hinge arm 302 has a first extrusion block 3021 with a convex arrangement. When the hinge is closed, the first extrusion block 3021 abuts against the bottom wall of the cylinder of the buffer 4 and is used to push the buffer 4 to slide in the mounting groove 4011, thereby achieving a buffering effect. The first extrusion block 3021 is arranged in a square shape, and a side of the first extrusion block 3021 that abuts against the buffer 4 adopts an arc-shaped transition. Correspondingly, an arc-shaped transition is arranged at the downward end of the cylinder of the buffer 4, so that when the second hinge arm 302 rotates, the first extrusion block 3021 can more smoothly abut against the buffer 4 The cylinder body of the buffer 4 is abutted against each other, and the direct abutment between the first extrusion block 3021 and the bottom wall of the cylinder body of the buffer 4 ensures that when the hinge is closed, the buffer 4 can be squeezed more effectively, so that it can quickly enter the buffer state, thereby improving the buffer efficiency; secondly, the first extrusion block 3021 is arranged in a square shape, and the side abutting against the buffer 4 adopts an arc-shaped transition, which enhances the buffer stability and avoids damage or failure of the buffer 4 due to excessive local pressure; furthermore, an arc-shaped transition is also arranged at the downward end of the cylinder body of the buffer 4, which cooperates with the arc-shaped design of the first extrusion block 3021, so that the two can slide more smoothly when in contact, reduce friction and resistance, and extend the service life of the buffer 4.

[0053] In order to improve the stability of the mounting base 401 assembly and prevent the mounting base 401 from interfering with the hinge cup 1 when the hinge is closed, an extension portion 4014 is provided at one end of the mounting base 401 away from the mounting groove 4011. The extension portion 4014 is hinged to the hinge cup 1, and the hinged portion between the extension portion 4014 and the hinge cup 1 coincides with the hinged portion between the first hinge arm 301 and the hinge cup 1. The extension portion 4014 is arranged in a mirrored "L" shape. By setting the shape of the extension portion 4014, when the hinge is closed, the extension portion 4014 is extended. The portion 4014 will not interfere with the top of the hinge cup 1, so that the top wall of the hinge cup 1 is located at the bending part of the extension portion 4014, which plays a avoiding role. At the same time, the assembly of the extension portion 4014 and the hinge cup 1 improves the assembly stability of the mounting seat 401, so that when the squeezing force of the second hinge arm 302 on the buffer 4 is transmitted to the mounting seat 401, the mounting seat 401 can transmit the force to the door panel 7 through the hinge cup 1, thereby increasing the structural strength of the mounting seat 401 and enabling it to withstand greater loads and impact forces. This is particularly important for furniture such as doors, windows or cabinets that need to be opened and closed frequently, and can effectively prevent damage caused by overload. Through the hinge design of the extension part 4014 on the mounting base 401 and the hinge cup 1, the assembly of the mounting base 401 and the hinge is more stable, reducing looseness caused by vibration or long-term use, and improving the stability of the entire hinge system; secondly, the design of the extension part 4014 avoids damage or jamming caused by interference between the mounting base 401 and the hinge cup 1 when the hinge is closed, thereby improving the smoothness and service life of the hinge.

[0054] Specifically, this embodiment also includes a second connecting pin 602, which is inserted into the hinge cup 1, the first hinge arm 301, and the extension portion 4014 of the mounting seat 401 from the outside to the inside, thereby realizing the hinge connection between the first hinge arm 301 and the hinge cup 1, and the hinge connection between the mounting seat 401 and the hinge cup 1. Through the connection of the second connecting pin 602, a more stable hinge structure is formed, which can effectively resist deformation or looseness caused by vibration or external force, thereby improving the stability of the entire hinge system and enhancing the durability of the hinge system.

[0055] In terms of the specific installation structure of the spring 5, this embodiment also includes a sliding seat 501 and a first locking piece 502. The sliding seat 501 is slidably assembled with the third hinge arm 303, and the first locking piece 502 is assembled with the first hinge arm 301. The two ends of the spring 5 are respectively connected to the sliding seat 501 and the first locking piece 502. The end of the fourth hinge arm 304 close to the third hinge arm 303 abuts against the sliding seat 501 and is used to push the sliding seat 501 to move. When the hinge is unfolded, the fourth hinge arm 304 applies force to the end of the sliding seat 501 away from the first locking piece 502, so as to push the sliding seat 501 to slide along the inner wall of the third hinge arm 303, thereby squeezing the spring 5 to achieve a buffering effect. Through the design of the sliding seat 501, a space for the spring 5 to be firmly installed is provided, which can resist external vibration and impact and maintain the stability of the hinge system.

[0056] In order to reduce the elastic force of the spring 5 pushing the sliding seat 501 to slide when the spring 5 is reset, so that the sliding seat 501 slides out of the third hinge arm 303 from the end away from the first locking piece 502, the present embodiment also includes a second locking piece 503, the second locking piece 503 is assembled with the fourth hinge arm 304 and is located on the side of the sliding seat 501 away from the first locking piece 502, the distance between the first locking piece 502 and the second locking piece 503 is greater than the length of the sliding seat 501, thereby ensuring that the sliding seat 501 has a sliding amount between the first locking piece 502 and the second locking piece 503, ensuring that the sliding seat 501 will not accidentally slide out of the third hinge arm 303 due to excessive elastic force of the spring 5 during the reset process, thereby enhancing the stability and reliability of the entire system and extending the service life of the hinge.

[0057] Furthermore, there is a gap between the first retaining member 502 and the top wall of the third hinge arm 303, and there is a gap between the second retaining member 503 and the top wall of the third hinge arm 303. Protrusions 5011 are provided at both ends of the sliding seat, so that the mounting seat 401 is arranged in a "T" shape, and the protrusion 5011 at one end thereof slides in the gap between the first retaining member 502 and the top wall of the third hinge arm 303, and the protrusion 5011 at the other end slides in the gap between the second retaining member 503 and the top wall of the third hinge arm 303. Therefore, the first retaining member 502 and the second retaining member 503 not only play a role in limiting the mounting seat 401, but also play a role in installing the mounting seat 401 in the third hinge arm 303, thereby ensuring the accuracy and stability of the sliding seat when sliding in the third hinge arm 303.

[0058] Among them, this embodiment also includes a third connecting pin 603, which is sequentially inserted into the third hinge arm 303 and the fourth hinge arm 304 from the outside to the inside, and is used to hinge the third hinge arm 303 and the fourth hinge arm 304. The third connecting pin 603 enhances the connection strength between the third hinge arm 303 and the fourth hinge arm 304.

[0059] When the hinge is opened and closed, the fourth hinge arm 304 is hinged with the fourth hinge arm 304 to generate rotation. In order to convert the rotation stroke of the fourth hinge arm 304 into a linear movement stroke that pushes the sliding seat 501 to slide, the fourth hinge arm 304 is provided with a second extrusion block 3041. The second extrusion block 3041 is arranged at one end close to the third hinge arm 303. The second extrusion block 3041 is arranged to protrude obliquely downward. The second extrusion block 3041 is arranged in a semi-elliptical shape. As the fourth hinge arm 304 rotates, the distance between the second extrusion block 3041 and the hinge point between the fourth hinge arm 304 and the third hinge arm 303 increases, thereby achieving the effect of pushing the sliding seat 501 to slide. Due to the semi-elliptical design of the second extrusion block 3041, the change of its shape and position can accurately control the sliding distance and speed of the sliding seat 501, thereby achieving precise motion control.

[0060] In order to improve the uniformity of force when the fourth hinge arm 304 pushes the sliding seat 501, two groups of springs 5 ​​are provided. The two groups of springs 5 ​​are installed in the sliding seat 501 at intervals. The second extrusion block 3041 is located in the middle position of the sliding seat 501, and the two groups of springs 5 ​​are located on both sides of the second extrusion block 3041. When the second extrusion block 3041 is pushed by the fourth hinge arm 304, the two groups of springs 5 ​​can be subjected to force at the same time, ensuring that the sliding seat 501 is subjected to uniform force during movement, thereby reducing deformation or jamming caused by uneven force.

[0061] Furthermore, in order to optimize the stress condition of the fourth hinge arm 304, the fourth hinge arm 304 is bent toward the third hinge arm 303 and is provided with a bent portion 3042, and the second extrusion block 3041 is located on the bent portion 3042. By providing the bent portion 3042 on the fourth hinge arm 304, the bending radius of the hinge arm is increased, so that the fourth hinge arm 304 is more stable when bearing the force during the rotation process, thereby reducing the risk of damage caused by stress concentration.

[0062] In order to improve the stability of the assembly of the spring 5 and the sliding seat 501, the sliding seat 501 is provided with a placement groove 5012 for assembling the spring 5, one end of the spring 5 is assembled with the placement groove 5012 and the other end of the spring 5 is exposed at the notch of the placement groove 5012. Specifically, the depth of the placement groove 5012 is 1 / 2 of the length of the spring 5, so that 1 / 2 of the length of the spring 5 is exposed at the notch of the placement groove 5012, preventing the spring 5 from falling off from the placement groove 5012 under vibration or impact, thereby improving the reliability and durability of the opening and closing of the hinge.

[0063] In order to improve the sliding accuracy of the sliding seat 501 and reduce the offset of the sliding seat 501, a sliding groove 3031 is provided on the top wall of the third hinge arm 303, and the top wall of the sliding seat 501 has a protruding lug portion 4015, and the lug portion 4015 slides in the sliding groove 3031. The lug portion 4015 is provided with two groups, and the two groups of protrusions 5011 are arranged corresponding to the two groups of springs 5. Correspondingly, two groups of sliding grooves 3031 are spaced apart on the top wall of the third hinge arm 303, and a third limit block 3032 is formed between the inner side walls of the two groups of sliding grooves 3031, which is used to limit the rotation angle of the second extrusion block 3041. The matching design of the sliding groove 3031 and the lug portion 4015 makes the sliding process of the sliding seat 501 on the third hinge arm 303 more precise, reduces the offset during the sliding process, and improves the stability of the sliding seat 501 during the sliding process.

[0064] After the hinge is installed on the cabinet, it is necessary to fine-tune the position of the base 2, which is achieved by fine-tuning the screw. In order to be able to turn the fine-tuning screw when the hinge arm is opened and closed, a first avoidance hole 3043 is opened on the bent portion 3042 of the fourth hinge arm 304 from top to the base 2. When the hinge is unfolded, the first avoidance hole 3043 is located above the fine-tuning screw. A second avoidance hole 3033 is opened on the top wall of the third hinge arm 303 away from the mounting seat 401. When the hinge is closed, the second avoidance hole 3033 is located above the fine-tuning screw. It should be noted that the end of the fourth hinge arm 304 away from the bent portion 3042 is a hollow design, that is, a support arm hinged to the base 2 is provided, thereby playing an avoidance role when the adjusting screw is screwed on the hinge in the closed state. The design of the first avoidance hole 3043 and the second avoidance hole 3033 ensures that the fine-tuning screw can be conveniently turned when the hinge is opened and closed, thereby achieving all-round adjustment of the position of the base 2 and improving the versatility and applicability of the hinge.

[0065] Example 2: Figure 1-14As shown, a 125° opening and closing hinge includes a large-angle opening and closing hinge in Example 1, wherein one end of the first hinge arm 301 is hinged to the outward side of the hinge cup 1 to form a seventh hinge, two ends of the second hinge arm 302 are respectively hinged to the other end of the first hinge arm 301 and one end of the base 2 to form a sixth hinge and a fourth hinge, one end of the third hinge arm 303 is hinged to the inward side of the hinge cup 1 to form a fifth hinge, one end of the fourth hinge arm 304 is hinged to the side wall of the base 2 to form a first hinge, the other end of the fourth hinge arm 304 is hinged to the other end of the third hinge arm 303 to form a third hinge, and the third hinge arm 303 is sleeved on the first hinge. On the outer side of the hinge arm 301 and the second hinge arm 302, the side wall of the third hinge arm 303 is hinged to the side wall of the second hinge arm 302 to form a second hinge, the base 2 is used to connect with the side panel 8 of the cabinet, the hinge cup 1 is used to connect with the door panel 7, and the seventh hinge is located between the sixth hinge and the seventh hinge, meeting the requirements of specific furniture and equipment for an opening and closing angle of 125°, allowing designers to more accurately realize their design intentions, avoiding appearance defects caused by the use of hinges at inappropriate angles, such as the door not being able to fully fit, etc., thereby improving the overall aesthetics of the product, meeting consumers' needs for hinges at specific angles, and improving their satisfaction and loyalty to the product.

[0066] In terms of the specific structure of the hinge between the fourth hinge arm 304 and the base 2, the fourth hinge arm 304 is hinged to the base 2 to form a first hinge, and the second hinge arm 302 is hinged to the base 2 to form a second hinge. The center distance between the first hinge and the second hinge is D1, and the longitudinal length of the base 2 is L1. D1=(60%~70%)×L1. Preferably, D1=64%×L1. By setting a suitable proportional relationship between D1 and L1, the stability of the hinge during rotation can be ensured, the shaking or deformation caused by unreasonable structure can be reduced, and the service life of the hinge can be extended. By accurately calculating the value of D1, the space occupied by the hinge can be minimized while meeting the hinge opening and closing angle, thereby improving space utilization.

[0067] The line connecting the first hinge and the second hinge forms an angle a with the bottom surface of the base 2, and the angle a is 7° to 12°. Preferably, the angle a is 10°. The reasonable setting of the angle a helps to optimize the force distribution of the hinge during rotation. When the angle a is 10°, the hinge can more evenly bear the weight and force from the door panel 7 during rotation, reduce the situation of excessive local force, and thus extend the service life of the hinge.

[0068] It is worth mentioning that the hinge is divided into three specifications according to the bending degree or bending shape of the hinge: large bend, medium bend and small bend, which indicates the bending degree of the base 2 and the hinge cup 1 relative to their axis. This bending design is to adapt to different door panel 7 thicknesses and cabinet side panel 8 structures, to ensure the correct fit between the door panel 7 and the cabinet and the smooth opening and closing of the door. In order to ensure the bending angles of the large bend and the medium bend, the base 2 also includes a connecting portion, which is protruding upward from the top wall of the base 2, one end of the fourth hinge arm 304 is hinged to the connecting portion, and one end of the base 2 assembled with the second hinge arm 302 is bent upward to ensure that the angle a is 10°. Figure 3 When the hinge is of a small bend specification, the fourth hinge arm 304 is hinged to the side wall of the base 2, and the design requirements of the small bend can be met without setting a connecting part. The user can select the appropriate hinge specification according to the thickness of the door panel 7, ensuring the correct fit between the door panel 7 and the cabinet body, thereby achieving smooth opening and closing of the door panel 7.

[0069] In terms of the specific structure of the hinge between the third hinge arm 303 and the fourth hinge arm 304, the fourth hinge arm 304 is hinged to the third hinge arm 303 to form a third hinge, the third hinge arm 303 is hinged to the second hinge arm 302 to form a fourth hinge, the center distance between the third hinge and the second hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D3=D1, D2=(66%~70%)×D1, preferably, D2=67%×D1, the precise calculation of D2 and D3 ensures that the hinge has a smooth motion trajectory when rotating, so that the door panel 7 opens and closes more smoothly, reducing friction and resistance.

[0070] In terms of the specific structure of the hinge between the third hinge arm 303 and the hinge cup 1, the third hinge arm 303 is hinged with the hinge cup 1 to form a fifth hinge, and the center distance between the fifth hinge and the fourth hinge is D4, D4=(90%~95%)×D3, preferably, D4=92%×D3, by precisely controlling the proportional relationship between D4 and D3, the hinge can maintain sufficient strength and stability while improving structural compactness.

[0071] Among them, the center distance between the second hinge and the fourth hinge is D5, D5=D2, which makes the hinge more uniform when subjected to force, thereby improving the overall stability and durability.

[0072] In terms of the specific structure of the hinge between the second hinge arm 302 and the first hinge arm 301, the second hinge arm 302 and the first hinge arm 301 are hinged to form a sixth hinge, and the center distance between the sixth hinge and the fourth hinge is D6, D6 = (75%~80%) × D5, preferably, D6 = 78% × D5, which helps to ensure that the hinge has a smooth motion trajectory when rotating, especially in the connecting part between the second hinge arm 302 and the first hinge arm 301, so that the opening and closing of the door panel 7 is smoother.

[0073] In terms of the specific structure of the hinged assembly of the first hinge arm 301 and the hinge cup 1, the first hinge arm 301 is hinged to the hinge cup 1 to form a seventh hinge, and the center distance between the seventh hinge and the sixth hinge is D7, D7=(180%~185%)×D6, preferably, D7=183%×D6, which optimizes the force distribution of the hinge during rotation, makes the connecting part between the first hinge arm 301 and the hinge cup 1 more evenly stressed, reduces wear and damage caused by uneven force, and enhances the durability and service life of the hinge.

[0074] In terms of the specific front and rear positions of the hinges between the first hinge arm 301, the third hinge arm 303 and the hinge cup 1, the center distance between the seventh hinge and the fifth hinge is D8, D8=(30%~35%)×L1, preferably, D8=32%×L1, which optimizes the internal space layout of the hinge, makes the coordination between the various components more compact, reduces unnecessary space occupation, and also helps to improve the overall aesthetics of the hinge.

[0075] Example 3: Figure 1-18 As shown, a 125° opening and closing device includes a door panel 7, a cabinet, and a 125° opening and closing hinge in Example 2, wherein the base 2 is connected to the cabinet side panel 8, and the hinge cup 1 is connected to the door panel 7. When the door panel 7 is opened until the door panel 7 is parallel to the cabinet side wall, the distance between the inner wall of the door panel 7 and the inner wall of the cabinet side panel 8 is L2, and L2=(5%~7%)×L1, so that the cabinet has a larger opening space, which is convenient for users to take and put items and improves the convenience of use. By setting the distance L2, the inner wall of the door panel 7 is exposed to the inner wall of the cabinet side panel 8. When a drawer is installed in the cabinet, the door panel 7 will not interfere with the outer wall of the drawer, thereby improving the smoothness of drawing and pulling the drawer.

[0076] Reference Fig.15 and Fig.16 This embodiment provides a specific implementation method. When the thickness of the door panel 7 is 18 mm and the thickness of the cabinet side panel 8 is 18 mm, L2=4~5 mm, and the value of L2 is accurately set to 4~5 mm.

[0077] Reference Fig.16 and Fig.17 This embodiment provides another specific implementation method. When the thickness of the door panel 7 is 36 mm and the thickness of the cabinet side panel 8 is 36 mm, L2=4~5 mm. The cabinet side panel 8 is provided with a groove. The inner wall of the groove is 18 mm×36 mm. When the door panel 7 is closed, one end of the door panel 7 is located in the groove.

[0078] Reference Figures 16 to 18This embodiment provides another specific implementation method. When the thickness of the door panel 7 is 25 mm and the thickness of the cabinet side panel 8 is 43 mm, L2=4~5 mm. A first chamfer is cut at one end of the door panel 7, and the chamfer is a crabapple angle. A second chamfer is cut at the cabinet side panel 8 corresponding to the door panel 7, and the width of the second chamfer is 25 mm.

[0079] Example 4: Figure 1-14 A 155° opening and closing hinge includes a large-angle opening and closing hinge in Example 2, wherein one end of a first hinge arm 301 is hinged to the outward side of a hinge cup 1 to form a seventh hinge, two ends of a second hinge arm 302 are respectively hinged to the other end of the first hinge arm 301 and one end of a base 2 to form a sixth hinge and a fourth hinge, one end of a third hinge arm 303 is hinged to the inward side of a hinge cup 1 to form a fifth hinge, one end of a fourth hinge arm 304 is hinged to the side wall of the base 2 to form a first hinge, the other end of the fourth hinge arm 304 is hinged to the other end of the third hinge arm 303 to form a third hinge, and the third hinge arm 303 is sleeved on the first hinge 301 and the outer side of the second hinge arm 302, the side wall of the third hinge arm 303 is hinged to the side wall of the second hinge arm 302 to form a second hinge, the base 2 is used to connect with the side panel 8 of the cabinet, the hinge cup 1 is used to connect with the door panel 7, and the seventh hinge is located between the sixth hinge and the seventh hinge, meeting the requirements of specific furniture and equipment for an opening and closing angle of 125°, allowing designers to realize their design intentions more accurately, avoiding appearance defects caused by using hinges of inappropriate angles, such as the door not being able to fully fit, etc., improving the overall aesthetics of the product, meeting consumers' needs for hinges of specific angles, and improving their satisfaction and loyalty to the product.

[0080] In terms of the specific structure of the hinge between the fourth hinge arm 304 and the base 2, the fourth hinge arm 304 is hinged to the base 2 to form a first hinge, and the second hinge arm 302 is hinged to the base 2 to form a second hinge. The center distance between the first hinge and the second hinge is D1, and the longitudinal length of the base 2 is L1. D1=(60%~70%)×L1. Preferably, D1=64%×L1. By setting a suitable proportional relationship between D1 and L1, the stability of the hinge during rotation can be ensured, the shaking or deformation caused by unreasonable structure can be reduced, and the service life of the hinge can be extended. By accurately calculating the value of D1, the space occupied by the hinge can be minimized while meeting the hinge opening and closing angle, thereby improving space utilization.

[0081] The line connecting the first hinge and the second hinge forms an angle a with the bottom surface of the base 2, and the angle a is 7° to 12°. Preferably, the angle a is 10°. The reasonable setting of the angle a helps to optimize the force distribution of the hinge during rotation. When the angle a is 10°, the hinge can more evenly bear the weight and force from the door panel 7 during rotation, reduce the situation of excessive local force, and thus extend the service life of the hinge.

[0082] It is worth mentioning that the hinge is divided into three specifications according to the bending degree or bending shape of the hinge, namely large bend, medium bend and small bend, which indicates the bending degree of the base 2 and the hinge cup 1 relative to their axis. This bending design is to adapt to different door panel 7 thicknesses and cabinet side panel 8 structures, to ensure the correct fit between the door panel 7 and the cabinet and the smooth opening and closing of the door. In order to ensure the bending angles of the large bend and the medium bend, the base 2 also includes a connecting portion, which is protruding upward from the top wall of the base 2, and one end of the fourth hinge arm 304 is hinged to the connecting portion, and the end of the base 2 assembled with the second hinge arm 302 is bent upward to ensure that the angle a is 10°. When the hinge is a small bend specification, the fourth hinge arm 304 is hinged to the side wall of the base 2, and there is no need to set a connecting portion to meet the design requirements of the small bend. The user can select the appropriate hinge specification according to the thickness of the door panel 7, to ensure the correct fit between the door panel 7 and the cabinet, thereby realizing the smooth opening and closing of the door panel 7.

[0083] In terms of the specific structure of the hinge between the third hinge arm 303 and the fourth hinge arm 304, the fourth hinge arm 304 is hinged to the third hinge arm 303 to form a third hinge, the third hinge arm 303 is hinged to the second hinge arm 302 to form a fourth hinge, the center distance between the third hinge and the second hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D3=(101%~106%)×D1, D2=(60%~65%)×D1, preferably, D3=104%×D1, D2=65%×D1, the precise calculation of D2 and D3 ensures that the hinge has a smooth motion trajectory when rotating, so that the door panel 7 opens and closes more smoothly, reducing friction and resistance.

[0084] In terms of the specific structure of the hinge between the third hinge arm 303 and the hinge cup 1, the third hinge arm 303 is hinged with the hinge cup 1 to form a fifth hinge, and the center distance between the fifth hinge and the fourth hinge is D4, D4=(80%~85%)×D3, preferably, D4=83%×D3, by precisely controlling the proportional relationship between D4 and D3, the hinge can maintain sufficient strength and stability while improving structural compactness.

[0085] Among them, the center distance between the second hinge and the fourth hinge is D5, D5=(95%~99%)×D2, preferably, D5=98%×D2, so that the hinge is more uniform when subjected to force, thereby improving the overall stability and durability.

[0086] In terms of the specific structure of the hinge between the second hinge arm 302 and the first hinge arm 301, the second hinge arm 302 and the first hinge arm 301 are hinged to form a sixth hinge, and the center distance between the sixth hinge and the fourth hinge is D6, D6=(85%~93%)×D5, preferably, D6=89%×D5, which helps to ensure that the hinge has a smooth motion trajectory when rotating, especially in the connecting part between the second hinge arm 302 and the first hinge arm 301, so that the opening and closing of the door panel 7 is smoother.

[0087] In terms of the specific structure of the hinged assembly of the first hinge arm 301 and the hinge cup 1, the first hinge arm 301 is hinged to the hinge cup 1 to form a seventh hinge, and the center distance between the seventh hinge and the sixth hinge is D7, D7=(115%~125%)×D6, preferably, D7=121%×D6, which optimizes the force distribution of the hinge during rotation, makes the connecting part between the first hinge arm 301 and the hinge cup 1 more evenly stressed, reduces wear and damage caused by uneven force, and enhances the durability and service life of the hinge.

[0088] In terms of the specific front and rear positions of the hinges between the first hinge arm 301, the third hinge arm 303 and the hinge cup 1, the center distance between the seventh hinge and the fifth hinge is D8, D8=(30%~35%)×L1, preferably, D8=33%×L1, which optimizes the internal space layout of the hinge, makes the coordination between the various components more compact, reduces unnecessary space occupation, and also helps to improve the overall aesthetics of the hinge.

[0089] Example 5: Figure 1-14 and Figure 19-22 As shown, a 155° opening and closing device includes a door panel 7, a cabinet, and also includes a 155° opening and closing hinge in Example 4, the base 2 is connected to the cabinet side panel 8, the hinge cup 1 is connected to the door panel 7, when the door panel 7 is opened until the door panel 7 is parallel to the cabinet side wall, the distance between the inner wall of the door panel 7 and the inner wall of the cabinet side panel 8 is L2, L2=(5%~7%)×L1, so that the cabinet has a larger opening space, which is convenient for users to take and put items and improves the convenience of use. By setting the distance L2, the inner wall of the door panel 7 is exposed to the inner wall of the cabinet side panel 8. When a drawer is installed in the cabinet, the door panel 7 will not interfere with the outer wall of the drawer, thereby improving the smoothness of drawing and pulling the drawer.

[0090] Reference Fig.19 and Fig. 20 This embodiment provides a specific implementation method. When the thickness of the door panel 7 is 18 mm and the thickness of the cabinet side panel 8 is 18 mm, L2=4~5 mm.

[0091] Reference Figure 20 to Figure 22This embodiment provides another specific implementation method. When the thickness of the door panel 7 is 18-19 mm and the thickness of the cabinet side panel 8 is 36-39 mm, L2=4-5 mm.

[0092] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A large-angle opening and closing hinge, comprising a hinge cup, a base, a first hinge arm, a second hinge arm, a third hinge arm, and a fourth hinge arm, wherein one end of the first hinge arm is hinged to the outward side of the hinge cup, two ends of the second hinge arm are respectively hinged to the other end of the first hinge arm and one end of the base, one end of the third hinge arm is hinged to the inward side of the hinge cup, one end of the fourth hinge arm is hinged to the base, the other end of the fourth hinge arm is hinged to the other end of the third hinge arm, the third hinge arm is sleeved on the outside of the first hinge arm and the second hinge arm, and the side wall of the third hinge arm is hinged to the side wall of the second hinge arm, characterized in that: It also includes a buffer and a spring. The buffer is assembled with the first hinge arm and is used to elastically buffer the hinge cup. The spring is assembled with the third hinge arm and is used to buffer the fourth hinge arm.

2. A large-angle opening and closing hinge according to claim 1, characterized in that: When the hinge is in an extended state, the buffer is in a reset state and the spring is in an elastically compressed state; when the hinge is closed, the buffer is in an elastically compressed state and the spring is in a reset state.

3. A large-angle opening and closing hinge according to claim 2, characterized in that: It also includes a mounting seat, which is assembled in the first hinge arm. The buffer is slidably assembled with the mounting seat. When the second hinge arm rotates, the buffer elastically telescopes and slides in the mounting seat.

4. A large-angle opening and closing hinge according to claim 3, characterized in that: The mounting seat is provided with a mounting groove for assembling the buffer, the side wall of the buffer cylinder has a protruding first limit block, the first limit block is provided in two groups and is arranged opposite to the side wall of the buffer cylinder, and the inner side wall of the mounting groove is provided with a first recessed portion for adapting to the first limit block.

5. A large-angle opening and closing hinge according to claim 4, characterized in that: The inner top wall of the second hinge arm has a first extrusion block which is protruding. When the hinge is closed, the first extrusion block abuts against the bottom wall of the cylinder of the buffer and is used to push the buffer to slide in the installation groove.

6. A large-angle opening and closing hinge according to claim 4, characterized in that: An extension portion is provided at one end of the mounting seat away from the mounting groove, the extension portion is hinged to the hinge cup, and the hinged portion between the extension portion and the hinge cup coincides with the hinged portion between the first hinge arm and the hinge cup.

7. The large-angle opening and closing hinge according to claim 1, characterized in that: It also includes a sliding seat and a first locking piece. The sliding seat is slidably assembled with the third hinge arm, the first locking piece is assembled with the first hinge arm, the two ends of the spring are respectively connected to the sliding seat and the first locking piece, and the end of the fourth hinge arm close to the third hinge arm abuts against the sliding seat and is used to push the sliding seat to move.

8. A large-angle opening and closing hinge according to claim 7, characterized in that: The fourth hinge arm is provided with a second extrusion block, the second extrusion block is arranged at an end close to the third hinge arm, and the second extrusion block is arranged to protrude obliquely downward.

9. The large-angle opening and closing hinge according to claim 7, characterized in that: The top wall of the third hinge arm is provided with a sliding groove, and the top wall of the sliding seat has a protruding lug portion, and the lug portion slides in the sliding groove.

10. A hinge with a 155° opening and closing angle, characterized in that: It includes a large-angle opening and closing hinge as described in any one of claims 1 to 9, the side wall of the third hinge arm is hinged to the side wall of the second hinge arm to form a second hinge, the fourth hinge arm is hinged to the third hinge arm to form a third hinge, the third hinge arm is hinged to the second hinge arm to form a fourth hinge, the center distance between the third hinge and the second hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D3=(101%~106%)×D1, D2=(60%~65%)×D1.

Images