Buffering hinge

Abstract

The utility model relates to the technical field of hinges, in particular to a buffering hinge which comprises a hinge body, the hinge body comprises a hinge arm, a hinge cup, an outer rocker arm, an inner rocker arm, a torsional spring, a sliding piece, a damper and a supporting piece, the sliding piece is assembled on the inner wall of the hinge arm and slides back and forth towards the torsional spring, and the supporting piece is assembled on the hinge cup. The side wall of the sliding part is turned over towards the inner side wall of the hinge arm to form a turnup portion, the inner rocker arm is provided with a hook portion used for abutting against the turnup portion in a protruding mode, a cylinder body of the damper abuts against the torsional spring, a push rod of the damper abuts against the sliding part, the supporting part is connected with the hinge arm, and the supporting part is connected with the hinge arm. The supporting piece is located below the sliding piece and used for supporting the sliding piece, the risk that the damper is abnormally inserted into the spiral body of the torsional spring in the hinge opening and closing process is reduced, the hinge opening and closing smoothness is improved, the reliability and stability of the damper on the hinge closing buffering effect are improved, and the service life of the hinge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a buffer hinge. Background Art

[0002] A hinge is a mechanical device used to connect two solid objects and allow them to rotate relative to each other. A buffer hinge, also known as a damping hinge, is a type of hinge. Doors equipped with buffer hinges can slowly close automatically when closing, reducing the noise generated by the impact of the door closing and improving the user experience. Therefore, buffer hinges are favored by the market.

[0003] For example, the Chinese patent with announcement number CN204571625U discloses a two-stage force sliding-in buffer hinge, which includes a hinge cup, a hinge arm, a base, a first connecting rod and a second connecting rod connected between the hinge cup and the hinge arm, a rotating part installed in the hinge arm, a buffer that drives the second connecting rod to move through the rotating part, and a torsion spring. The hinge arm has a U-shaped groove, and long grooves are respectively provided on both sides of the U-shaped groove. The base is fixed in the U-shaped groove of the hinge arm by adjusting screws and locking screws. The two side edges of the base are respectively inserted into the long grooves of the hinge arm, and the base can move back and forth in the long grooves.

[0004] The buffer hinge adopts the above structure, which has a complex structure and relies on the piston rod of the damper to pull the pusher to play a buffering role. When in use, the piston rod does not move on the axis, so the friction between the piston rod and the cylinder sealing ring is large. After long-term use, it is easy to leak oil, resulting in failure of the door hinge, short service life, inconvenient maintenance, and poor door hinge precision. In order to solve the above technical problems, a Chinese patent with announcement number CN106761095B discloses a door hinge with a buffering function, wherein a plug-in structure is provided on the top of the damper, the plug-in structure is inserted in the dovetail groove and can move relatively so that the damper can move in a direction within the shell, the installation cover, the plug-in structure and the installation hole cooperate with each other to fix the installation cover on the shell, and blocks are also provided on the front and rear sides of the damper. The pushing structure can push the corresponding block to drive the damper to move in a direction within the shell, and the piston rod of the damper is pressed against the torsion spring, so that the damper buffers closing and resetting, achieving the effects of stable buffering force, long service life, convenient maintenance and high precision.

[0005] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: first, due to the limitation of the installation space, the piston rod of the damper abuts against the torsion spring. During the opening and closing process of the hinge, the contact area between the piston rod and the outer wall of the torsion spring is small, resulting in pressure concentration, and the piston rod is inserted into the spiral body of the torsion spring, which changes the direction of the damper movement stroke and causes abnormal buffering of the hinge; second, the assembly method of the damper movement trajectory is limited by the installation cover plate and the plug-in structure on the top of the damper. Since the installation cover plate is installed on the outside of the outer shell, it is easily affected by external environmental factors during use or transportation, causing the installation cover plate to fall off the outer shell, resulting in abnormal sliding of the damper, thereby affecting the buffering effect of the hinge; third, since there are also blocks on the front and back sides of the damper, it is necessary to use a special damper, which increases the production cost, and the damper has poor interchangeability during assembly or use. Utility Model Content

[0006] In order to solve at least one technical problem in the background technology, the present application provides a buffer hinge.

[0007] The utility model provides a buffer hinge adopting the following technical solutions:

[0008] A buffer hinge comprises a hinge body, the hinge body comprises a hinge arm, a hinge cup, an outer rocker arm, an inner rocker arm, and a torsion spring, the hinge cup is inserted with a U-shaped pin, and is used to hinge one end of the outer rocker arm and one end of the inner rocker arm to the hinge cup, the hinge arm is connected to an upper rotating shaft, and is used to hinge the other end of the outer rocker arm to the hinge arm, the hinge arm is connected to a lower rotating shaft, and is used to hinge the other end of the inner rocker arm to the hinge arm, the torsion spring is sleeved with the upper rotating shaft, one torsion arm of the torsion spring abuts against the U-shaped pin, and the other torsion arm of the torsion spring Abutting the lower rotating shaft, the hinge body also includes a sliding member, a damper, and a support member. The sliding member is assembled on the inner wall of the hinge arm and slides back and forth toward the torsion spring. The side wall of the sliding member is folded toward the inner wall of the hinge arm to form a flange portion. The inner rocker arm protrusion is provided with a hook portion for abutting the flange portion. The cylinder body of the damper abuts the torsion spring, the push rod of the damper abuts the sliding member, and the support member is connected to the hinge arm. The support member is located below the sliding member and is used to support the sliding member.

[0009] Preferably, the flange portion is provided at one end of the sliding member close to the torsion spring, and two groups of flange portions are provided and respectively located on two side walls of the sliding member, and the hook portion abuts against a side wall of the flange portion away from the torsion spring.

[0010] Preferably, the sliding member is provided with an assembly cavity opening toward the torsion spring, the push rod of the damper abuts against the side wall of the assembly cavity, and when the damper is in a reset state, at least part of the cylinder of the damper is located in the assembly cavity.

[0011] Preferably, the flange portion is arranged perpendicular to the side wall of the sliding member, and the flange portion is in contact with the inner side wall of the hinge arm.

[0012] Preferably, the top wall of the sliding member is provided with an upper limit portion protruding toward the inner side wall of the hinge arm, and two groups of the upper limit portions are provided, and the two groups of the upper limit portions are respectively located on the two lateral walls of the sliding member.

[0013] Preferably, the sliding member is provided with a lower limit portion for connecting to the bottom of the assembly cavity, and both lateral sides of the lower limit portion are exposed to the sliding member. When the sliding member slides, the lower limit portion slides on the support member.

[0014] Preferably, the inner rocker arm is provided with a giving way portion, and the giving way portion is recessed from the flange portion toward the top wall of the inner rocker arm.

[0015] Preferably, the hook portion is provided with an inclined surface, and the inclined surface is gradually inclined from the top wall of the hook portion toward the yield portion. When the damper is in a compressed state, the inclined surface contacts the flange portion.

[0016] Preferably, the hook portion is provided with a curved surface, and the curved surface is provided in an arc-shaped depression from the yield portion toward the inclined surface.

[0017] Preferably, the line connecting the axis of the upper rotating shaft and the axis of the support member is L1, the line connecting the axis of the lower rotating shaft and the axis of the support member is L2, and an angle a is formed between L1 and L2, and the angle a is 20° to 30°.

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

[0019] By abutting the cylinder of the damper against the torsion spring, the contact area between the damper and the cylinder is greatly increased, which solves the problem in the prior art that the piston rod of the damper abuts against the torsion spring, causing pressure concentration and causing the piston rod to insert into the helical body of the torsion spring. Since the cylinder of the damper is much larger than the wire diameter of the torsion spring and larger than the gap between the helical bodies of the torsion spring, the risk of the damper abnormally inserting into the helical body of the torsion spring during the opening and closing of the hinge is reduced, the smoothness of the opening and closing of the hinge is improved, the reliability and stability of the damper's buffering effect on the hinge closure are improved, and the service life of the hinge is increased.

[0020] By providing a support member, a vertical supporting force is provided for the sliding member, and the sliding of the sliding member is limited by the flange portion, so that the contact area between the sliding member and the inner wall of the hinge arm is smaller, the friction force is smaller, and it is more conducive to the sliding of the sliding member. At the same time, the flange portion plays a role in cooperating with the hook portion to pull, and also plays a role in sliding limitation, which solves the problem in the prior art that the installed cover plate is easy to fall off during use or transportation. When the hinge is opened and closed, the sliding member moves back and forth along the inner wall of the hinge arm toward the spiral body of the torsion spring, avoiding the direction of the force offset of the sliding member during the sliding process, and reducing the abnormal situation of the damper slipping between the torsion spring and the sliding member.

[0021] The sliding part is provided with a flange part, an upper limit part and a lower limit part, which contact and limit the inner wall of the hinge arm. By providing an assembly cavity, the stability of the damper assembly is increased, the directional movement of the damper during the sliding process is ensured, and the accuracy of the buffering effect is improved. This solves the problem of special dampers with blocks on the front and rear sides in the existing technology, so that conventional dampers can be assembled in the sliding part, reducing production costs and improving the interchangeability of dampers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a top view of an embodiment of the present application;

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

[0024] Figure 3 yes Figure 1 Cross-sectional view at AA in the middle;

[0025] Figure 4 This is a partial disassembled diagram of an embodiment of the present application;

[0026] Figure 5 It is a partial schematic diagram of an embodiment of the present application;

[0027] Figure 6 It is a partial top view of an embodiment of the present application;

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

[0029] Figure 8 It is a closed state diagram in the embodiment of the present application;

[0030] Figure 9 This is Example 2 of the present application Figure 1 Cross-sectional view at the middle BB;

[0031] Figure 10 yes Figure 9 A partial enlarged view of point C in the middle.

[0032] Explanation of the accompanying drawings: 1. Hinge arm; 101. Upper rotating shaft; 102. Lower rotating shaft; 103. Bearing part; 104. Flange part; 2. Hinge cup; 201. U-shaped pin; 3. Outer rocker arm; 4. Inner rocker arm; 401. Hook part; 4011. Inclined surface; 4012. Arc surface; 402. Give way part; 5. Torsion spring; 6. Sliding part; 601. Flanged part; 602. Assembly cavity; 603. Upper limit part; 604. Lower limit part; 7. Damper; 701. Connecting seat; 8. Support member; 801. Plane part; 9. Base; 901. Avoidance groove. DETAILED DESCRIPTION

[0033] This section will describe the specific embodiments of the present application in detail. 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.

[0034] In the description of this application, if there is a description of orientation, such as "upper", "lower", "front", "back", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It 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 operate in a specific orientation. Therefore, it should not be understood as a limitation on this application. When a feature is referred to as being "disposed", "fixed", or "connected" to another feature, it can be directly disposed, fixed, or connected to the other feature, or indirectly disposed, fixed, or connected to the other feature.

[0035] In the description of this application, if the description involves "X axis", "Y axis", "Z axis", "horizontal", "longitudinal" and "vertical", it is based on the attached Figure 2 In the orientation or position relationship shown, the X-axis represents the horizontal direction, the Y-axis represents the longitudinal direction, and the Z-axis represents the vertical direction.

[0036] In the description of this application, if the word "several" is mentioned, it means one or more; if the word "multiple" is mentioned, it means more than two; if the word "greater than," "less than," or "exceeds," it should be understood as excluding the number itself; if the word "above," "below," or "within" is mentioned, it should be understood as including the number itself. If the word "first" or "second" is mentioned, it should be understood as distinguishing technical features, and should not be understood as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0037] In addition, unless otherwise defined, the technical terms and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art. The terms used in this application are only for describing specific embodiments and are not intended to limit this application. It should be understood that when used in this specification and the appended claims, the terms "comprise" and "include" indicate the presence of the 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.

[0038] Example 1: Figure 1-8 As shown, a buffer hinge includes a hinge body, which includes a hinge arm 1, a hinge cup 2, an outer rocker arm 3, an inner rocker arm 4, a torsion spring 5, a sliding member 6, a damper 7, and a support member 8. The hinge cup 2 is inserted with a U-shaped pin 201, and is used to hinge one end of the outer rocker arm 3 and one end of the inner rocker arm 4 to the hinge cup 2. The hinge arm 1 is connected to an upper rotating shaft 101, and is used to hinge the other end of the outer rocker arm 3 to the hinge arm 1. The hinge arm 1 is connected to a lower rotating shaft 102, and is used to hinge the other end of the inner rocker arm 4 to the hinge arm 1. The inner rocker arm 4 is located on the inner side of the outer rocker arm 3. The torsion spring 5 is sleeved with the upper rotating shaft 101. One torsion arm of the torsion spring 5 abuts against the U-shaped pin 201, and the other torsion arm of the torsion spring 5 abuts against the lower rotating shaft 102. The sliding member 6 is assembled on the inner wall of the hinge arm 1 and slides back and forth toward the torsion spring 5. The side wall of the sliding member 6 is folded toward the inner wall of the hinge arm 1 to form a flange portion 601. The inner rocker arm 4 is protruded and provided with a hook portion 401 for abutting against the flange portion 601. The cylinder body of the damper 7 abuts against the torsion spring 5, and the push rod of the damper 7 abuts against the sliding member 6. The support member 8 is connected to the hinge arm 1. The support member 8 is located below the sliding member 6 and is used to support the sliding member 6. The support will be set in a cylindrical shape.

[0039] By abutting the cylinder of the damper 7 against the torsion spring 5, the contact area between the damper 7 and the cylinder is greatly increased compared to the solution in which the pushing end of the damper 7 abuts against the torsion spring 5. Since the cylinder of the damper 7 is much larger than the wire diameter of the torsion spring 5 and larger than the gap between the helices of the torsion spring 5, it is worth mentioning that in this embodiment, the cylinder diameter of the damper 7 is equal to 4 times the wire diameter of the torsion spring 5. Therefore, the risk of the damper 7 being abnormally inserted into the helices of the torsion spring 5 during the opening and closing of the hinge is reduced, the smoothness of the opening and closing of the hinge is improved, the reliability and stability of the damper 7's buffering effect on hinge closure are improved, and the service life of the hinge is increased.

[0040] Secondly, since the push rod of the damper 7 is in contact with the sliding member 6, the force of the damper 7 is transmitted or released toward the sliding member 6 during the opening and closing process of the hinge. Compared with the solutions in the prior art, the sliding member 6 bears a larger force. By providing the support member 8, a vertical supporting force is provided for the sliding member 6, so that when the hinge is opened and closed, the sliding member 6 moves back and forth along the inner wall of the hinge arm 1 toward the spiral body of the torsion spring 5, thereby preventing the sliding member 6 from being subjected to force deviation during the sliding process, thereby reducing the abnormal situation of the damper 7 slipping off between the torsion spring 5 and the sliding member 6;

[0041] Furthermore, since the support member 8 is provided to support the sliding, the force on the hook portion 401 is reduced, making the hook portion 401 pull the flange portion 601 more smoothly, reducing the possibility of the hook portion 401 being compressed and deformed, and improving the service life of the hinge.

[0042] Furthermore, in order to enhance the supporting effect of the support member 8 on the sliding member 6 , the support member 8 is supported at the middle position of the longitudinal length of the sliding member 6 .

[0043] In terms of the specific setting position of the flange portion 601 and the specific assembly relationship between the hook portion 401 and the flange portion 601, the flange portion 601 is set at one end of the sliding member 6 close to the torsion spring 5, and there are two groups of flange portions 601, which are respectively located on the two side walls of the sliding member 6. The hook portion 401 abuts against the side wall of the flange portion 601 away from the torsion spring 5, and the hook portion 401 is provided with two groups of flange portions 601. The flange portion 601 is integrally formed with the sliding member 6, which improves the structural rigidity of the sliding member 6 and the structural integrity of the sliding member 6. By providing two groups of flange parts, the uniformity of the pulling force of the hook portion 401 of the inner rocker arm 4 on the sliding member 6 is improved. In the process of hinge closing, the inner rocker arm 4 can better pull the sliding member 6 to squeeze the damper 7, thereby achieving a buffering effect.

[0044] When the hinge is opened and closed, the damper 7 slides between the torsion spring 5 and the sliding member 6. In order to prevent the damper 7 from falling off during use, the sliding member 6 is provided with an assembly cavity 602 with an opening facing the torsion spring 5. The push rod of the damper 7 abuts against the side wall of the assembly cavity 602. When the damper 7 is in the reset state, at least part of the cylinder of the damper 7 is located in the assembly cavity 602. By providing the assembly cavity 602, the stability of the damper 7 assembly is increased, the directional movement of the damper 7 during the sliding process is ensured, the accuracy of the buffering effect is improved, and the damper 7 is effectively prevented from falling off during the opening and closing process of the hinge, thereby improving the stability and safety of the hinge. At the same time, the assembly cavity 602 provides a protective space for the damper 7, reduces the direct impact of the external environment on the damper 7, and extends the service life of the damper 7.

[0045] The hinge body further includes a base 9 , which is assembled at the other end of the hinge arm 1 . An avoidance groove 901 is provided at one end of the base 9 close to the sliding member 6 , and the inner wall of the avoidance groove 901 supports and limits the sliding member 6 .

[0046] In the prior art, the assembly method of the damper 7 is to limit the moving trajectory of the damper 7 by cooperating with the plug-in structure of the installation cover plate and the top of the damper 7. Since the installation cover plate is installed on the outside of the shell, there is a problem that the installation cover plate is affected by external environmental factors and falls off during use or transportation, resulting in abnormal sliding of the damper 7. In this embodiment, in order to improve the sliding accuracy, the sliding member 6 moves back and forth along the inner wall of the hinge arm 1 toward the torsion spring 5, and the flange portion 601 is perpendicular to the side wall of the sliding member 6. The flange portion 601 contacts the inner wall of the hinge arm 1, and the flange portion 601 is perpendicular to the side wall of the sliding member 6. The lateral distance is equal to the lateral distance of the inner wall of the hinge arm 1, and the flange distances of the two sets of flanges 601 are equal, so that the sliding member 6 slides in the center of the hinge arm 1. Compared with the solution of designing the entire shape of the sliding member 6 to adapt to the inner wall of the hinge arm 1, the solution of limiting the sliding of the sliding member 6 by the flange 601 in this embodiment makes the contact area between the sliding member 6 and the inner wall of the hinge arm 1 smaller, the friction force is smaller, and it is more conducive to the sliding of the sliding member 6. At the same time, the flange 601 plays a role in cooperating with the hook 401 to pull, and also plays a role in sliding limitation.

[0047] In addition, compared with the technical solution of using an installation cover and a plug-in structure in the prior art, the technical solution in this embodiment is to limit the sliding position of the sliding part 6 by the flange portion 601, thereby squeezing the damper 7. The structure is simple. Since the sliding part 6 is assembled in the hinge arm 1 and is integrally formed, the risk of parts falling off during use or transportation is reduced, and the stability and reliability of the hinge are improved. At the same time, there is no need to open an opening on the hinge arm 1 to assemble the installation cover, which helps to improve the structural rigidity of the hinge arm 1; furthermore, the flange portion 601 contacts the inner wall of the hinge arm 1, so that a conventional damper 7 can be assembled in the sliding part 6, thereby reducing production costs and improving the interchangeability of the damper 7.

[0048] The cam 603 is located on the left and right sides of the hinge 1, so that the cam 603 is in the center of the hinge 1 and the cam 604 is in the center of the hinge 1. The cam 603 is located on the right and left sides of the hinge 1, so that the cam 603 is in the center of the hinge 1 and the cam 604 is in the center of the hinge 1.

[0049] In order to reduce the friction resistance between the upper limit portion 603 and the inner wall of the hinge arm 1 and to support and limit the sliding member 6, the longitudinal length of the upper limit portion 603 is equal to 1 / 4 to 1 / 3 of the longitudinal length of the sliding member 6, and the upper limit portion 603 is located in the middle position of the sliding member 6.

[0050] Since the sliding member 6 is provided with an assembly cavity 602, the support member 8 contacts the two side walls of the assembly cavity 602, and the contact area is small, which causes pressure concentration and easily leads to bending and deformation of the support member 8. The sliding member 6 is provided with a lower limit portion 604 for connecting to the bottom of the assembly cavity 602. The lateral sides of the lower limit portion 604 are exposed to the sliding member 6 and contact the inner side wall of the hinge arm 1. When the sliding member 6 slides, the lower limit portion 604 slides on the support member 8. When the damper 7 is in the reset state, at least part of the cylinder of the damper 7 is located on the lower limit portion 604. By providing the lower limit portion 604, the sliding member is lifted 6 and the contact area with the support member 8, thereby improving the supporting and limiting effect of the support member 8 on the sliding member 6. Secondly, the lower limiting portion 604 plays a limiting role in the cooperation between the sliding member 6 and the inner wall of the hinge arm 1, and the lower limiting portion 604 is located below the upper limiting portion 603. The two form two sets of limits in the vertical direction, further improving the sliding accuracy of the sliding member 6. It is worth mentioning that the lower limiting portion 604 is formed by bending the longitudinal side wall of the sliding member 6, and the lower limiting portion 604 is arranged on the side of the sliding member 6 close to the base 9. The longitudinal length of the lower limiting portion 604 is equal to 1 / 2 to 2 / 3 of the longitudinal length of the sliding member 6.

[0051] Since the support member 8 supports the sliding member 6, the flange portion 601 does not contact the hook portion 401 and plays a supporting role. The inner rocker arm 4 is provided with a yield portion 402, and the yield portion 402 is recessed from the flange portion 601 toward the top wall of the inner rocker arm 4. The yield portion 402 is located between the torsion spring 5 and the hook portion 401. By providing the yield portion 402, a gap is created between the flange portion 601 and the hook portion 401, reducing the possibility of contact between the two, thereby reducing wear and friction resistance, and further reducing friction resistance, so that the movement of the sliding member 6 is smoother and the risk of deformation of the hook portion 401 is reduced.

[0052] When the hinge is closed, the hook portion 401 abuts against the flange portion 601. In order to increase the contact area between the hook portion 401 and the flange portion 601, the hook portion 401 is provided with a slope 4011. The slope 4011 is gradually inclined from the top wall of the hook portion 401 toward the yield portion 402. When the damper 7 is in a compressed state, the slope 4011 contacts the flange portion 601. When the hinge is closed, the slope 4011 contacts the flange portion 601. The setting of the slope 4011 increases the contact area between the hook portion 401 and the flange portion 601. In this way, when the hinge arm 1 is closed, the pressure of the damper 7 can be more evenly distributed, local stress concentration can be reduced, and the stability of the hinge closure can be improved.

[0053] In order to improve the smoothness of sliding between the hook portion 401 and the flange portion 601, the hook portion 401 is provided with a curved surface 4012, and the curved surface 4012 is arranged in an arc-shaped recessed manner from the yield portion 402 toward the inclined surface 4011. The design of the curved surface 4012 makes the contact between the hook portion 401 and the flange portion 601 smoother during sliding, reduces friction, helps to guide the flange portion 601 to slide smoothly, avoids jamming, and makes the opening and closing action of the hinge smoother.

[0054] Furthermore, the corners of the flange portion 601 facing the arc surface 4012 are rounded, thereby improving the sliding smoothness between the hook portion 401 and the flange portion 601 .

[0055] Reference Figure 5 In terms of the arrangement position relationship between the support member 8 and the upper rotating shaft 101 and the lower rotating shaft 102, the line connecting the axis center of the upper rotating shaft 101 and the axis center of the support member 8 is L1, and the line connecting the axis center of the lower rotating shaft 102 and the axis center of the support member 8 is L2. Angle a is formed between L1 and L2, and the angle a is 20°~30°, preferably 26°. The design of angle a makes the force distribution between the upper rotating shaft 101, the support member 8 and the lower rotating shaft 102 more uniform, which helps to reduce the load of a single component, thereby improving the overall stability and durability of the hinge, and making the damping effect of the buffer hinge more uniform.

[0056] In order to facilitate the assembly of the support member 8 , the hinge arm 1 is provided with a flange portion 104 , which is protruded from the side wall of the hinge arm 1 , the lower shaft 102 is assembled on the flange portion 104 , and the support member 8 is partially located on the flange portion 104 .

[0057] Example 2: Figure 1 、 Figure 9 、 Figure 10 As shown, it includes a buffer hinge in Example 1. In order to increase the contact area between the damper 7 and the torsion spring 5, the contact area is improved from line contact to surface contact, thereby reducing the wear between the cylinder of the damper 7 and the torsion spring 5. This embodiment also includes a connecting seat 701, which is assembled between the cylinder of the damper 7 and the torsion spring 5. The side of the connecting seat 701 in contact with the torsion spring 5 is arranged in an arc shape and is adapted to the outer ring wall of the torsion spring 5. The side of the connecting seat 701 in contact with the damper 7 is arranged in a plane and is adapted to the bottom surface of the cylinder of the damper 7. By changing the line contact Improved to surface contact, the arc-shaped design of the connecting seat 701 increases the contact area between the damper 7 and the torsion spring 5, thereby significantly reducing the wear between the two, making the force transmission between the damper 7 cylinder and the torsion spring 5 more uniform, reducing the vibration and noise caused by poor contact, and improving the stability and reliability of the hinge during the opening and closing process. The plane of the connecting seat 701 is adapted to the bottom surface of the damper 7 cylinder, ensuring that the damper 7 can work more smoothly during the buffering process, thereby providing a more uniform and effective buffering effect and improving the user experience.

[0058] Furthermore, in order to improve the assembly stability between the connecting seat 701 and the damper 7 , the connecting seat 701 is provided with a groove for assembling the damper 7 .

[0059] In order to enhance the supporting effect on the sliding member 6 and reduce the force of the sliding member 6 acting on the supporting member 8, a bearing portion 103 is provided on the inner side wall of the hinge arm 1. The bearing portion 103 is protruded from the inner side wall of the hinge arm 1 toward the side wall of the sliding member 6. The bearing portion 103 is located below the upper limit portion 603. When the sliding member 6 slides, the upper limit portion 603 slides on the bearing portion 103. The bearing portion 103 supports and limits the upper limit portion 603, so that the sliding member 6 slides along the inner side wall of the hinge arm 1.

[0060] Different from the support member 8 in Example 1, in this embodiment, in order to increase the contact area between the support member 8 and the lower limit portion 604, the support member 8 is provided with a flat portion 801 for contacting the lower limit portion 604. The flat portion 801 is in surface contact with the lower limit portion 604 to increase the contact area. Preferably, the support member 8 is arranged in a square shape, which is beneficial to improving the compressive resistance of the support member 8.

[0061] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A buffer hinge, comprising a hinge body, the hinge body comprising a hinge arm, a hinge cup, an outer rocker arm, an inner rocker arm, and a torsion spring, the hinge cup being provided with a U-shaped pin for hingedly connecting one end of the outer rocker arm and one end of the inner rocker arm to the hinge cup, the hinge arm being connected to an upper rotating shaft for hingedly connecting the other end of the outer rocker arm to the hinge arm, the hinge arm being connected to a lower rotating shaft for hingedly connecting the other end of the inner rocker arm to the hinge arm, the torsion spring being sleeved with the upper rotating shaft, one torsion arm of the torsion spring being in contact with the U-shaped pin, and the other torsion arm of the torsion spring being in contact with the lower rotating shaft, characterized in that: The hinge body also includes a sliding member, a damper, and a support member. The sliding member is assembled on the inner wall of the hinge arm and slides back and forth toward the torsion spring. The side wall of the sliding member is folded toward the inner wall of the hinge arm to form a flange portion. The inner rocker arm protrusion is provided with a hook portion for abutting against the flange portion. The cylinder body of the damper abuts against the torsion spring, and the push rod of the damper abuts against the sliding member. The support member is connected to the hinge arm. The support member is located below the sliding member and is used to support the sliding member.

2. The buffer hinge according to claim 1, characterized in that: The flange portion is provided at one end of the sliding member close to the torsion spring. The flange portion is provided in two groups and is respectively located on two side walls of the sliding member. The hook portion abuts against a side wall of the flange portion away from the torsion spring.

3. The buffer hinge according to claim 1, characterized in that: The sliding member is provided with an assembly cavity opening toward the torsion spring, the push rod of the damper abuts against the side wall of the assembly cavity, and when the damper is in a reset state, at least a portion of the cylinder of the damper is located in the assembly cavity.

4. The buffer hinge according to claim 2, characterized in that: The flange portion is arranged perpendicular to the side wall of the sliding member, and the flange portion contacts the inner side wall of the hinge arm.

5. A buffer hinge according to claim 1 or 4, characterized in that: The top wall of the sliding member is protruded toward the inner side wall of the hinge arm to form an upper limit portion. There are two groups of upper limit portions, and the two groups of upper limit portions are respectively located on the two transverse side walls of the sliding member.

6. The buffer hinge according to claim 3, characterized in that: The sliding member is provided with a lower limit portion for connecting to the bottom of the assembly cavity, and both lateral sides of the lower limit portion are exposed on the sliding member. When the sliding member slides, the lower limit portion slides on the support member.

7. The buffer hinge according to claim 1, characterized in that: The inner rocker arm is provided with a relief portion, and the relief portion is recessed from the flange portion toward the top wall of the inner rocker arm.

8. The buffer hinge according to claim 7, characterized in that: The hook portion is provided with an inclined surface, which is gradually inclined from the top wall of the hook portion toward the yield portion. When the damper is in a compressed state, the inclined surface contacts the flange portion.

9. The buffer hinge according to claim 8, characterized in that: The hook portion is provided with a curved surface, and the curved surface is arranged to be concave in an arc shape from the yield portion toward the inclined surface.

10. The buffer hinge according to claim 1, characterized in that: The line connecting the axis of the upper rotating shaft and the axis of the support member is L1, and the line connecting the axis of the lower rotating shaft and the axis of the support member is L2. An angle a is formed between L1 and L2, and the angle a is 20° to 30°.

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