A buffer hinge with large opening and closing angle and a hinge with 180° opening and closing

Abstract

The utility model relates to the technical field of hinges, and more specifically, it relates to a buffer hinge for large-angle opening and closing and a hinge for 180° opening and closing, comprising a hinge cup, a base, a first hinge arm, a second hinge arm, a third hinge arm, and a fourth hinge arm, and also comprising a fifth hinge arm, a buffer, and a first connecting pin. The side wall of the fifth hinge arm is hinged to the side wall of the base and is located on the side of the second hinge arm away from the hinge cup. The buffer is located in the base and the push rod of the buffer is rotatably connected to one end of the fifth hinge arm. A hook is provided at one end of the fifth hinge arm, and the two ends of the first connecting pin are respectively connected to the two side walls of the second hinge arm and are arranged close to the base. When the hinge changes from an expanded state to a closed state, the hook moves toward the outer ring wall of the first connecting pin until the hook is hooked on the first connecting pin. The action of hooking and detaching the hook from the first connecting pin improves the speed and efficiency of door panel closing, reduces impact and noise, and improves user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a buffer hinge capable of opening and closing at a large angle and a hinge capable of opening and closing at 180 degrees. Background Art

[0002] Hinge, as a common connector, is widely used in various furniture, equipment and other fields. Its main function is to realize the rotation connection between two parts, so that the door panel and the cabinet side panel can be opened and closed freely within a certain range. In order to improve the user experience and reduce the impact force between the door panel and the cabinet when the hinge is closed, hydraulic buffer hinges are introduced on the market. Hydraulic buffer hinges use the hydraulic principle to achieve the buffering function. Its built-in hydraulic buffer provides buffering force during the opening and closing of the door panel, thereby effectively reducing noise and impact;

[0003] However, there are currently limited types of large-angle hinges. The maximum opening angle of common hinges is 165°. This type of hinge is suitable for doors that need to be almost fully opened, such as folding doors. Although this angle can already meet the needs of most usage scenarios, in some special occasions, such as custom furniture, the door panel needs to be able to open completely flat. Since there is no 180° hinge, designers can only choose hinges with other angles as a substitute, which often leads to a deviation between the design effect and the actual installation effect, thereby affecting the overall function and appearance of the product and reducing the user experience;

[0004] In addition, the hydraulic buffer in the prior art adopts a linear buffering effect, that is, the buffering force remains consistent from the beginning of the hinge closing to the complete closing of the hinge. However, in actual use, the buffering force only needs to be provided a moment before the door panel contacts the cabinet body to effectively reduce noise and impact. Since the existing hinge provides the same amount of buffering force when it starts to close, this causes the door panel to close slowly. Especially for hinges that open and close at a large angle, the opening and closing stroke is large and the closing speed is slow, which increases the closing time, reduces the closing efficiency, and affects the user's normal use experience. Utility Model Content

[0005] In order to increase the opening and closing angle of the hinge and optimize the buffering effect of the buffer, the present application provides a 180° opening and closing hinge and an opening and closing device.

[0006] In the first aspect, the utility model provides a buffer hinge with large-angle opening and closing, which adopts the following technical solution:

[0007] A hinge and an opening and closing device capable of opening and closing 180 degrees, 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 outer side of the second hinge arm, and the side wall of the third hinge arm is hinged to the second hinge arm The side wall of the fifth hinge arm is hinged, and also includes a fifth hinge arm, a buffer, and a first connecting pin. The side wall of the fifth hinge arm is hinged to the side wall of the base and is located on a side of the second hinge arm away from the hinge cup. The buffer is located in the base and the push rod of the buffer is rotatably connected to one end of the fifth hinge arm. A hook is provided at one end of the fifth hinge arm, and the two ends of the first connecting pin are respectively connected to the two side walls of the second hinge arm and are arranged close to the base. When the hinge changes from an expanded state to a closed state, the hook moves toward the outer ring wall of the first connecting pin until the hook is hooked on the first connecting pin.

[0008] Preferably, the second hinge arm is hinged to the base to form a second hinge, the fifth hinge arm is hinged to the base to form an eighth hinge, the center distance between the second hinge and the eighth hinge is D9, the center distance between the first connecting pin and the second hinge is D10, and D10 = (55% to 60%) × D9.

[0009] Preferably, the line connecting the eighth hinge and the second hinge is K1, and the line connecting the center of the first connecting pin and the second hinge is K2, and an angle b is formed between K1 and K2, and the angle b is 130° to 135°.

[0010] Preferably, the fifth hinge arm is bent from the eighth hinge toward the first connecting pin to form a bent portion, and the bent portion has an opening to form the hook portion.

[0011] Preferably, an arcuate surface is provided on the side facing the bent portion, the arcuate surface is provided corresponding to the eighth hinge, and a first supporting portion is provided on the inner side wall of the base protruding inwardly, and the first supporting portion is located below the arcuate surface.

[0012] Preferably, it also includes a spring and a U-shaped mounting seat, wherein the spring is installed in the second hinge arm and is used to buffer the first hinge arm, and the mounting seat is installed on the inner wall of the second hinge arm and is used to support the spring.

[0013] Preferably, it also includes a clamping piece, which is assembled in the first hinge arm. The clamping piece includes a pressure block and a support arm. The pressure block is assembled on the support arm and is used to abut against one end of the spring. The pressure block and the support arm are staggered.

[0014] In the second aspect, the utility model provides a 180° opening and closing hinge, which adopts the following technical solution:

[0015] A hinge that opens and closes at 180°, comprising the above-mentioned buffer hinge that opens and closes at a large angle, wherein the fourth hinge arm is hinged to the base to form a first 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 first hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D2 = (70% to 75%) × D1, D3 = (100% to 110%) × D1

[0016] Preferably, it further comprises a second connecting pin, the bottom wall of the hinge cup has a hollow arched portion, two groups of the arched portions are provided and are respectively located on the lateral sides of the first hinge arm, a connecting hole is provided at the hinged joint between the first hinge arm and the hinge cup, and the second connecting pin is passed through between the two groups of the arched portions and the connecting holes

[0017] Preferably, the third hinge arm is provided with a bending portion, and the bending portion extends longitudinally from the fourth hinge point and then bends toward the fifth intersection to form an angle e, and the angle e is 97° to 103°.

[0018] The beneficial effects of the utility model are:

[0019] By providing a hook portion and a first connecting pin, and the hooking and detaching actions of the hook portion and the first connecting pin, the buffering effect of the buffer is activated only when the hinge is close to closing. Before the buffering effect of the buffer intervenes, the door panel can be closed quickly, which improves the speed and efficiency of the door panel closing. After the buffer intervenes, it plays a buffering role to achieve smooth closing of the door panel, reduce impact and noise, and improve user experience, especially when the hinge is opened and closed at a large angle, which reduces the closing time and improves the closing efficiency. At the same time, the wear of the buffer is reduced and the service life of the hinge is extended. Secondly, the length of the push rod of the buffer is shortened, the integrity of the large-angle buffer hinge assembly is improved, and the volume occupied by the buffer is reduced.

[0020] By providing a spring and a mounting seat, when the hinge is extended, the spring is in a compressed state and the push rod of the buffer is in an extended state; when the hinge is closed, the spring is in an extended state and the push rod of the buffer is in a compressed state, which effectively absorbs and disperses the impact force when the door panel is closed, thereby improving the buffering effect. Secondly, the dual buffering mechanism of the spring and the hydraulic buffer reduces the burden of a single buffering element, thereby extending the service life of the hinge and reducing maintenance costs. Furthermore, the mounting seat is designed to fix and support the spring, ensuring the stability of the spring during the buffering process, reducing the displacement of the spring during movement, and improving the stability of the overall structure.

[0021] The design of the fourth hinge arm and the third hinge arm ensures that the hinge can complete a 180° opening and closing action. The 180° opening and closing hinge can realize a completely flat opening of the door panel, meeting the needs of special occasions such as customized furniture, improving the flexibility and functionality of the design, providing a larger cabinet opening space, and enhancing user convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the first main view in the embodiment of the present application;

[0023] Figure 2 It is a stereogram in the embodiment of the present application;

[0024] Figure 3 is a cross-sectional view in an embodiment of the present application;

[0025] Figure 4 It is the second main view in the embodiment of the present application;

[0026] Figure 5 It is a disassembled stereogram in an embodiment of the present application;

[0027] Figure 6 It is a three-dimensional diagram of a small bend in an embodiment of the present application;

[0028] Figure 7 It is a three-dimensional diagram of a closed state in an embodiment of the present application;

[0029] Figure 8 is a cross-sectional view of a closed state in an embodiment of the present application;

[0030] Fig. 9 It is a three-dimensional diagram of the unfolded state in the embodiment of the present application;

[0031] Fig.10 is a cross-sectional view of an expanded state in an embodiment of the present application;

[0032] Fig.11 It is a front view of the fifth hinge arm in the embodiment of the present application;

[0033] Fig.12is a front view of the pressing member in the embodiment of the present application;

[0034] Fig.13 It is a front view of the third hinge arm in the embodiment of the present application;

[0035] Fig.14 It is a schematic diagram of the hinge installation in an embodiment of the present application.

[0036] Explanation of the reference numerals: 1. hinge cup; 101. second connecting pin; 102. arched portion; 2. base; 201. first supporting portion; 3. first hinge arm; 301. fifth connecting pin; 4. second hinge arm; 401. first connecting pin; 402. fourth connecting pin; 5. third hinge arm; 501. third connecting pin; 502. bending portion; 6. fourth hinge arm; 7. buffer; 701. fifth hinge arm; 702. bending portion; 7021. hook portion; 7022. guide slope; 7023. arc surface; 8. spring; 801. mounting seat; 8011. limiting portion; 8012. first lug portion; 8013. second lug portion; 802. pressing member; 8021. pressing block; 8022. supporting arm; 803. sixth connecting pin; 804. abutment block; 901. door panel; 902. cabinet body. DETAILED DESCRIPTION

[0037] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the present application can be understood intuitively and vividly, but it cannot be understood as a limitation on the scope of protection of the present application.

[0038] In the description of this application, if there is a description of orientation, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0039] In the description of this application, the directions indicated by "horizontal", "vertical" and "vertical" are based on the attached Figure 2 In the orientation shown, the X-axis represents "horizontal", the Y-axis represents "longitudinal", and the Z-axis represents "vertical".

[0040] In the description of this application, if "several" is involved, it means one or more, if "multiple" is involved, it means more than two, if "greater than", "less than", "exceed", they should be understood as not including the number, if "above", "below", "within" are involved, they should be understood as including the number. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In addition, unless otherwise defined, the technical terms and scientific terms used in this application are the same as those generally understood by those skilled in the art. The terms used in this application are only for describing specific embodiments, not for limiting this application. It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0042] 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.

[0043] Example 1: Figure 1-*13 shows a buffer hinge for large-angle opening and closing, comprising a hinge cup 1, a base 2, a first hinge arm 3, a second hinge arm 4, a third hinge arm 5, and a fourth hinge arm 6. One end of the first hinge arm 3 is hinged to the outward side of the hinge cup 1, two ends of the second hinge arm 4 are respectively hinged to the other end of the first hinge arm 3 and one end of the base 2, one end of the third hinge arm 5 is hinged to the inward side of the hinge cup 1, one end of the fourth hinge arm 6 is hinged to the base 2, and the other end of the fourth hinge arm 6 is hinged to the other end of the third hinge arm 5. The third hinge arm 5 is sleeved on the outer side of the second hinge arm 4, and the side wall of the third hinge arm 5 is hinged to the side wall of the second hinge arm 4 to form an "X" shape structure. It also includes a fifth hinge arm 701, a buffer 7, and a first connecting pin 401. The side wall of the fifth hinge arm 701 is hinged to the side wall of the base 2 and is located on the side of the second hinge arm 4 away from the hinge cup 1. The buffer 7 is located in the base 2 and its push rod rotates with one end of the fifth hinge arm 701 Connection, the cylinder body of the buffer 7 is connected to the inner wall of the base 2, and a hook 7021 is provided at one end of the fifth hinge arm 701. The two ends of the first connecting pin 401 are respectively connected to the two side walls of the second hinge arm 4 and are arranged close to the base 2. When the hinge changes from the expanded state to the closed state, the hook 7021 moves toward the outer ring wall of the first connecting pin 401 until the hook 7021 is hooked on the first connecting pin 401, thereby realizing the buffering effect of the buffer 7 only when the hinge is close to closing, avoiding the traditional hinge from applying buffering force too early during the closing process, thereby improving the closing speed and efficiency of the door panel 901, especially when opening and closing at a large angle, reducing the closing time and improving the use efficiency. At the same time, the wear of the buffer 7 is reduced and the service life of the hinge is extended. Secondly, the length of the push rod of the buffer 7 is shortened, the integrity of the large-angle buffer hinge assembly is improved, and the volume occupied by the buffer 7 is reduced.

[0044] Specifically, when the angle between the top wall of the hinge cup 1 and the top wall of the base 2 is 90°~100°, the hook 7021 starts to abut the first connecting pin 401. When the angle between the top wall of the hinge cup 1 and the top wall of the base 2 is 85°, that is, the hinge is in a closed state, the first connecting pin 401 is located in the hook 7021.

[0045] In the specific arrangement of the fifth hinge arm 701, the second hinge arm 4 is hinged with the base 2 to form a second hinge, the fifth hinge arm 701 is hinged with the base 2 to form an eighth hinge, the center distance between the second hinge and the eighth hinge is D9, the center distance between the first connecting pin 401 and the second hinge is D10, D10 = (55% ~ 60%) × D9. Preferably, D10 = 57% × D9, through the design of the center distance ratio, the timing of the activation of the buffer 7 is accurately controlled to ensure that the appropriate buffering force is provided when the door panel 901 is about to close, thereby effectively reducing noise and impact, and secondly, optimizing the closing speed, before the buffering effect of the buffer 7 intervenes, the door panel 901 can be quickly closed, thereby increasing the closing speed of the hinge and improving the user experience.

[0046] Among them, the longitudinal length of the base 2 is L1, D9=(15%-20%)×L1, D9=17%×L1.

[0047] In terms of the specific arrangement structure of the first connecting pin 401 and the fifth hinge, the connecting line between the eighth hinge and the second hinge is K1, and the connecting line between the center of the first connecting pin 401 and the second hinge is K2. Angle b is formed between K1 and K2, and angle b is 130°~135°. Preferably, angle b is 133°, which helps to provide a more effective buffering effect when the door panel 901 is about to close, reduce impact and noise, improve the user's comfort experience, strengthen the stability of the hinge during the opening and closing process, reduce swinging and vibration, and ensure the stability of the door panel 901 during movement.

[0048] Reference Fig.11 In terms of the specific structure of the hook portion 7021 hooked on the first connecting pin 401, the fifth hinge arm 701 is bent from the eighth hinge toward the first connecting pin 401 to form a bent portion 702, and the bent portion 702 has an opening to form the hook portion 7021. By providing the bent portion 702, when the hinge changes from an expanded state to a closed state, the fifth hinge arm 701 can hook the first connecting pin 401, so that the first connecting pin 401 transmits the force to the buffer 7 through the fifth hinge arm 701, pushing the push rod of the buffer 7, and the hydraulic oil in the cylinder of the buffer 7 is pushed. When the hinge changes from a closed state to an expanded state, the buffer 7 is reset, so that the push rod of the buffer 7 is pushed out by the hydraulic oil, so that the fifth hinge arm 701 takes the eighth hinge as a fulcrum, thereby the bent portion 702 rotates away from the first connecting pin 401, so that the hook portion 7021 is detached from the first connecting pin 401, which facilitates the expansion of the hinge. The curved design of the hook portion 7021 enables the hinge to move in both closing and expanding directions. Through the hooking and detaching actions, the hinge can be opened and closed smoothly, achieving an effective buffering effect and reducing noise and impact.

[0049] In order to facilitate the insertion of the hook portion 7021 into the first connecting pin 401, a guiding bevel 7022 is provided at one end of the hook portion 7021 facing the outer ring wall of the first connecting pin 401, and the guiding bevel 7022 is gradually expanded outward from the inner wall of the hook portion 7021 toward the first connecting pin 401. By providing the guiding bevel 7022, it is convenient to hook the hook portion 7021 with the first connecting pin 401. The bottom surface of the hook portion 7021 is arc-shaped, which is matched with the outer ring wall of the first connecting pin 401. The design of the guiding bevel 7022 enables the hook portion 7021 to slide and hook smoothly when inserted into the first connecting pin 401, thereby simplifying the operation process and improving the effectiveness of the buffer 7 in achieving the buffering effect. Secondly, the bottom surface of the arc-shaped hook portion 7021 is matched with the outer ring wall of the first connecting pin 401, ensuring the close fit between the hook portion 7021 and the connecting pin, improving the stability of the hooking, and reducing the problem of falling off or shaking caused by poor matching.

[0050] In terms of the specific bending structure of the bending portion 702, it also includes a third connecting pin 501, the third connecting pin 501 is inserted into the fifth hinge arm 701, the push rod of the buffer 7 is rotatably connected to the third connecting pin 501, the line connecting the center of the arc of the hook 7021 and the eighth hinge is K3, the line connecting the center of the third connecting pin 501 and the eighth hinge is K4, and an angle c is formed between K3 and K4, and the angle c is 112~117°. Preferably, the angle c is 115°, which ensures the effective transmission and utilization of force during the buffering process, improves the stability of the hinge during the buffering process, and ensures the stability of the door panel 901 during the opening and closing process.

[0051] In order to prevent the risk of displacement when the fifth hinge arm 701 rotates, an arcuate surface 7023 is provided on the side facing the bent portion 702, and the arcuate surface 7023 is provided corresponding to the eighth hinge. The inner wall of the base 2 is protruded inwardly and a first support portion 201 is provided. The first support portion 201 is located below the arcuate surface 7023 and is used to support the fifth hinge arm 701. The first support portion 201 is a cylindrical protrusion and is provided with two groups. The two groups of first support portions 201 are respectively located on the opposite side walls of the base 2, and the two groups of first support portions 201 are arranged opposite to each other. When the fifth hinge arm 701 rotates, the arcuate surface 7023 rotates along the outer ring wall of the first support portion 201, thereby offsetting part of the force, avoiding the force completely acting on the eighth hinge, which causes the fifth hinge arm 701 to be stuck in rotation, thereby improving the smoothness of the rotation of the fifth hinge arm 701 and improving the service life.

[0052] In order to further enhance the buffering effect of the hinge, it also includes a spring 8 and a U-shaped mounting seat 801. The spring 8 is installed in the second hinge arm 4 and is used to buffer the first hinge arm 3. The mounting seat 801 is installed on the inner wall of the second hinge arm 4 and is used to support the spring 8. When the hinge is unfolded, the spring 8 is in a compressed state, and the push rod of the buffer 7 is in an extended state. When the hinge is closed, the spring 8 is in an unfolded state, and the push rod of the buffer 7 is in a compressed state. The addition of the spring 8 provides an additional buffering effect for the hinge. Combined with the hydraulic buffer 7, it can more effectively absorb and disperse the impact force when the door panel 901 is closed, thereby significantly improving the buffering effect. Secondly, the dual buffering mechanism of the spring 8 and the hydraulic buffer 7 reduces the burden of a single buffering element, thereby extending the service life of the hinge and reducing maintenance costs. Furthermore, the mounting seat 801 is designed to fix and support the spring 8, ensuring the stability of the spring 8 during the buffering process, reducing the displacement of the spring 8 during movement, and improving the stability of the overall structure.

[0053] In order to lift the second hinge arm 4 to squeeze the spring 8 and achieve a buffering effect, a pressing member 802 is also included. The pressing member 802 is assembled in the first hinge arm 3. The pressing member 802 includes a pressing block 8021 and a support arm 8022. The pressing block 8021 is assembled on the support arm 8022 and is used to abut against one end of the spring 8. The pressing block 8021 and the support arm 8022 are staggered. The rotation of the first hinge arm 3 drives the pressing member 802 to move, and the pressing block 8021 and the support arm 8022 are staggered to complete the compression and release of the spring 8, thereby playing a buffering role. The design of the pressing member 802 makes the compression and release of the spring 8 in the buffering process more stable, reduces the vibration and displacement of the spring 8, and improves the stability of the overall hinge structure.

[0054] Reference Fig.12 In terms of the specific assembly structure of the clamping member 802, the present embodiment further includes a fifth connecting pin 301 and a sixth connecting pin 803. The fifth connecting pin 301 is provided through the first hinge arm 3, the second hinge arm 4, the end where the support arm 8022 and the pressing block 8021 are connected, thereby forming a sixth hinge. The fifth connecting pin 301 is provided through the first hinge arm 3 and the end where the support arm 8022 is away from the pressing block 8021, thereby completing the assembly of the clamping member 802 and the first hinge arm 3. The longitudinal vertical interface of the pressing block 8021 is trapezoidal. The shorter bottom edge of the pressing block 8021 is connected to the side wall of the support arm 8022, and the trapezoidal side wall of the pressing block 8021, that is, the waist close to the support arm 8022, forms an angle d with the side wall of the support arm 8022 close to the pressing block 8021, and the angle d is 78° to 82°. Preferably, the angle d is 79°, which optimizes the force transmission between the pressing block 8021 and the support arm 8022, ensures the effective transmission and utilization of force during the buffering process, and improves the buffering effect.

[0055] In terms of the specific structure of the assembly of the mounting seat 801 and the second hinge arm 4, the present embodiment further includes a fourth connecting pin 402, which is inserted through the third hinge arm 5 and the second hinge arm 4 to form a fourth hinge joint. The mounting seat 801 has a protruding first lug portion 8012 at one end facing the second hinge arm 4, and the first lug portion 8012 is arranged on both side walls of the mounting seat 801 and expands outwardly from both side walls of the mounting seat 801. The first lug portion 8012 is snap-fitted and assembled with the inner side wall of the second hinge arm 4. A limiting portion 8011 is provided at one end of the mounting seat 801 away from the first lug portion 8012, and the limiting portion 8011 is protruded upward from the bottom wall of the mounting seat 801. The other end of the spring 8 abuts against the limiting portion 8011, and the end of the mounting seat 801 close to the limiting portion 8011 has a protruding third Two lug portions 8013, the second lug portions 8013 are arranged on the two side walls of the mounting seat 801 and expand outward from the two side walls of the mounting seat 801, the second lug portions 8013 are snap-fitted and assembled with the inner side walls of the second hinge arm 4, an arc-shaped groove is provided at the end of the second lug portion 8013 close to the fourth connecting pin 402, the inner wall of the arc-shaped groove abuts against the outer ring wall of the fourth connecting pin 402, the inner side wall of the second hinge arm 4 has a protruding second support portion, the second support portion is provided with two groups and is oppositely arranged on the inner side wall of the second hinge arm 4, the second support portion is located below the first lug portion 8012, and is used to support the mounting seat 801, which helps to reduce the movement of the mounting seat 801 during the buffering process, improves the stability of the overall structure of the hinge, ensures the buffering effect, and reduces the impact and noise when the door panel 901 is closed.

[0056] In order to further improve the stability of the spring 8 assembly, the present embodiment also includes a butt block 804, which includes a cylindrical portion and a semicircular portion, the semicircular portion being axially connected to the cylindrical portion, the cylindrical portion of the butt block 804 being passed through the inner ring of the spring 8, and the semicircular portion of the butt block 804 being in contact with the end wall of the spring 8, playing the role of limiting and transmitting force, and there are two groups of butt blocks 804, which are respectively located at both ends of the spring 8, one group of butt blocks 804 is located between the spring 8 and the fourth connecting pin 402, the semicircular portion of the butt block 804 is downwardly arranged and located on the mounting seat 801, and the other group of butt blocks 804 is located between the spring and the clamping block 8021, and the semicircular portion of the butt block 804 is upwardly arranged.

[0057] Example 2: Figure 1-13As shown, a 180° opening and closing hinge includes a buffer hinge with a large angle opening and closing in Example 1, the fourth hinge arm 6 is hinged to the base 2 to form a first hinge, the fourth hinge arm 6 is hinged to the third hinge arm 5 to form a third hinge, the third hinge arm 5 is hinged to the second hinge arm 4 to form a fourth hinge, the center distance between the third hinge and the first hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D2 = (70% to 75%) × D1, D3 =(100%~110%)×D1, preferably, D2=71%×D1, D3=106%×D1. The design of the fourth hinge arm 6 and the third hinge arm 5 ensures that the hinge can complete a 180° opening and closing action. The 180° opening and closing hinge can realize the door panel 901 to be completely opened flat, meeting the needs of special occasions such as customized furniture, improving the flexibility and functionality of the design, providing a larger opening space for the cabinet 902, and improving the comfort and convenience of daily use.

[0058] In the specific structure of the hinge between the fourth hinge arm 6 and the base 2, the center distance between the first hinge and the second hinge is D1, the longitudinal length of the base 2 is L1, D1 = (55% ~ 60%) × L1, preferably, D1 = 59% × L1.

[0059] In terms of the specific arrangement structure of the first hinge and the second hinge, an angle a is formed between the line between the first hinge and the second hinge and the bottom surface of the base 2, and the angle a is 18° to 22°. Preferably, the angle a is 20°.

[0060] It is worth mentioning that the reference Figure 6 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, indicating 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 901 thicknesses and cabinet 902 side panel structures, to ensure the correct fit between the door panel 901 and the cabinet 902 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 of the fourth hinge arm 6 The end is hinged to the connecting part, and one end of the base 2 and the second hinge arm 4 is assembled and bent upward to ensure that the angle a is 20°. When the hinge is a small bend specification, the fourth hinge arm 6 is hinged to the top wall of the base 2, and one end of the base 2 and the second hinge arm 4 is assembled, and there is no need to be bent upward to meet the design requirements of the small bend. The user can choose the appropriate hinge specification according to the thickness of the door panel 901, ensuring the correct fit between the door panel 901 and the cabinet body 902, thereby realizing the smooth opening and closing of the door panel 901.

[0061] In terms of the specific structure of the third hinge arm 5 and the hinge cup 1, the third hinge arm 5 and the hinge cup 1 are hinged to form a fifth hinge, and the center distance between the fifth hinge and the fourth hinge is D4, D4 = (68% ~ 72%) × D3, preferably, D4 = 70% × D3.

[0062] The center distance between the second hinge and the fourth hinge is D5, D5 = (83% to 86%) × D2, preferably, D5 = 85% × D2.

[0063] In terms of the specific structure of the hinge between the second hinge arm 4 and the first hinge arm 3, the second hinge arm 4 and the first hinge arm 3 are hinged to form a sixth hinge, and the center distance between the sixth hinge and the fourth hinge is D6, D6 = (125% ~ 130%) × D5, preferably, D6 = 127% × D5.

[0064] In terms of the specific structure of the hinged assembly of the first hinge arm 3 and the hinge cup 1, the first hinge arm 3 and the hinge cup 1 are hinged to form a seventh hinge, and the center distance between the seventh hinge and the sixth hinge is D7, D7 = (110% ~ 120%) × D6, preferably, D7 = 114% × D6.

[0065] In terms of the specific front and rear positions of the hinges between the first hinge arm 3, the third hinge arm 5 and the hinge cup 1, the center distance between the seventh hinge and the fifth hinge is D8, D8 = (38% to 42%) × L1, preferably, D8 = 40% × L1.

[0066] In order to increase the opening and closing angle of the hinge and avoid interference between the first hinge arm 3 and the third hinge arm 5, the present embodiment also includes a second connecting pin 101. The bottom wall of the hinge cup 1 has a laterally hollow arched portion 102. The arched portion 102 is provided with two groups and is respectively located on the lateral sides of the first hinge arm 3. A connecting hole is provided at the hinge between the first hinge arm 3 and the hinge cup 1. The second connecting pin 101 is passed between the two groups of arched portions 102 and the connecting hole, and the two ends of the second connecting pin 101 are respectively located in the two groups of arched portions 102, thereby enhancing the stability of the hinge structure and ensuring smooth operation at a large opening and closing angle.

[0067] In order to avoid interference between the fourth hinge arm 6 and the hinge cup 1 when opening and closing at a large angle, a bending portion 502 is provided. The bending portion 502 extends longitudinally from the fourth hinge and bends toward the fifth intersection to form an angle e. The angle e is 97° to 103°. Preferably, the angle e is 99°. When the hinge is in the unfolded state, the top wall of the hinge cup 1 is located in the bending portion 502, reducing the risk of interference between the hinge cup 1 and the fourth hinge arm 6.

[0068] Example 3: Figure 1-14As shown, a 180° opening and closing device includes a door panel 901 and a cabinet body 902 , and also includes a 180° opening and closing hinge in Example 2, wherein the base 2 is connected to the side panel of the cabinet body 902 , and the hinge cup 1 is connected to the door panel 901 .

[0069] It is worth mentioning that when the hinge is fully extended, the door panel 901 and the cabinet body 902 are vertically arranged, so that the cabinet body has a larger opening space.

[0070] 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 buffer hinge for large-angle opening and closing, 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 outer side of 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 fifth hinge arm, a buffer, and a first connecting pin. The side wall of the fifth hinge arm is hinged to the side wall of the base and is located on the side of the second hinge arm away from the hinge cup. The buffer is located in the base and the push rod of the buffer is rotatably connected to one end of the fifth hinge arm. A hook is provided at one end of the fifth hinge arm. The two ends of the first connecting pin are respectively connected to the two side walls of the second hinge arm and are arranged close to the base. When the hinge changes from an expanded state to a closed state, the hook moves toward the outer ring wall of the first connecting pin until the hook is hooked on the first connecting pin.

2. A buffer hinge with large opening and closing angle according to claim 1, characterized in that: The second hinge arm is hinged to the base to form a second hinge, the fifth hinge arm is hinged to the base to form an eighth hinge, the center distance between the second hinge and the eighth hinge is D9, the center distance between the first connecting pin and the second hinge is D10, D10 = (55% ~ 60%) × D9.

3. A buffer hinge with large opening and closing angle according to claim 2, characterized in that: The connecting line between the eighth hinge and the second hinge is K1, and the connecting line between the center of the first connecting pin and the second hinge is K2. An angle b is formed between K1 and K2, and the angle b is 130° to 135°.

4. A buffer hinge for large-angle opening and closing according to claim 2, characterized in that: The fifth hinge arm is bent from the eighth hinge position toward the first connecting pin to form a bent portion, and the bent portion has an opening to form the hook portion.

5. A buffer hinge for large-angle opening and closing according to claim 4, characterized in that: An arcuate surface is arranged on the side facing the curved portion, and the arcuate surface is arranged corresponding to the eighth hinge. A first supporting portion is arranged on the inner side wall of the base protruding inward, and the first supporting portion is located below the arcuate surface.

6. The buffer hinge with large opening and closing angle according to claim 1, characterized in that: It also includes a spring and a "U"-shaped mounting seat, wherein the spring is installed in the second hinge arm and is used to buffer the first hinge arm, and the mounting seat is installed on the inner side wall of the second hinge arm and is used to support the spring.

7. A buffer hinge for large-angle opening and closing according to claim 6, characterized in that: It also includes a pressing piece, which is assembled in the first hinge arm. The pressing piece includes a pressing block and a support arm. The pressing block is assembled on the support arm and is used to abut against one end of the spring. The pressing block and the support arm are staggered.

8. A 180° opening and closing hinge, characterized in that: A buffer hinge for large-angle opening and closing comprising the method of any one of claims 1 to 7, wherein the fourth hinge arm is hinged to the base to form a first 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 first hinge is D2, the center distance between the third hinge and the fourth hinge is D3, D2 = (70% to 75%) × D1, D3 = (100% to 110%) × D1.

9. The 180° opening and closing hinge according to claim 8, characterized in that: It also includes a second connecting pin. The bottom wall of the hinge cup has a hollow arched portion. There are two groups of arched portions, which are respectively located on the lateral sides of the first hinge arm. A connecting hole is provided at the hinge between the first hinge arm and the hinge cup. The second connecting pin is passed between the two groups of arched portions and the connecting hole.

10. The 180° opening and closing hinge according to claim 9, characterized in that: The third hinge arm is provided with a bending portion, and the bending portion extends longitudinally from the fourth hinge point and then bends toward the fifth intersection to form an angle e, and the angle e is 97° to 103°.

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