Buffer hinge in cup

Abstract

The invention belongs to the technical field of buffer hinges, and particularly relates to an in-cup buffer hinge. According to the in-cup buffering hinge, the multiple driving teeth are arranged at the end of the driving arm of the first connecting rod in the circumferential direction, and the driving tooth grooves capable of being meshed are correspondingly formed in the tops of the driving bases on the two sides of the buffer, so that the driving arm stably drives the buffer in a mode that the symmetrical gears on the two sides are meshed; traditional single-side linear contact sliding friction is converted into double-side synchronous gear transmission, abrasion caused by sliding friction is thoroughly eliminated, the service life of a hinge is greatly prolonged, the reliability of the hinge is greatly improved, the acting force is evenly distributed on the whole buffer in the double-side simultaneous stress driving mode, unbalance loading and clamping stagnation are avoided, and the service life of the buffer is prolonged. And the driving force to the buffer is more stable and smooth, so that the bearing capacity of the structural strength is maintained, and the assisting and buffering effects in the opening and closing process are more stable and quiet.

Description

Technical Field

[0001] This invention belongs to the field of buffer hinge technology, specifically relating to an internal cup buffer hinge. Background Technology

[0002] Internal cup damping hinges are widely used in furniture such as cabinets and wardrobes due to their stable structure and strong load-bearing capacity. To improve the user experience, modern furniture generally requires hinges to have a damping function to achieve a quiet and smooth closing effect and reduce impact damage. Currently, most mainstream internal cup damping hinges on the market adopt a structure with an internal damper. In an internal cup damping hinge with an internal damper, the damper is placed inside the hinge cup, and the hinge arm, connected to the hinge seat at its end, abuts against the rear of the damper's cylinder. However, the hinge arm of the hinge seat and the rear of the damper's cylinder drive the damper's piston movement through line contact. This results in sliding friction between the hinge arm and the rear of the damper during the opening and closing process of the internal cup damping hinge. Under long-term use, significant frictional wear occurs at the rear of the damper, thus affecting the service life and reliability of the damping hinge. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem that existing cup-in-cup buffer hinges drive the buffer to move piston by means of line contact between the hinge arm of the hinge seat and the rear part of the buffer cylinder, which is prone to friction damage to the buffer after long-term use, and to provide a reliable cup-in-cup buffer hinge.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The cup-in-cup buffer hinge includes a hinge cup, a hinge seat, a linkage assembly, and a buffer.

[0005] A hinged cup with a cup cavity that has an opening at the top.

[0006] The hinged seat is rotatably connected to the cup cavity of the hinge cup via a connecting rod assembly on one side.

[0007] The linkage assembly includes a first linkage, a second linkage, and a torsion spring. Drive arms extend from both sides of one end of the first linkage. The first linkage extends into the cup cavity through the two drive arms and is rotatably connected to the two opposite side walls of the cup cavity. The other end of the first linkage is rotatably connected to the hinge seat through a first rotating shaft. The two ends of the second linkage are connected to the hinge seat and the hinge cup, respectively. The torsion spring is sleeved on the first rotating shaft, and the two spring arms of the torsion spring abut against the hinge seat and the second linkage, respectively. Several drive teeth are provided circumferentially at the ends of the two drive arms.

[0008] The buffer is slidably placed inside the cup cavity, with its output rod abutting against the rear wall of the cup cavity. The buffer has a drive seat on each side, and the top of the drive seat has several drive tooth grooves along the length of the buffer. The drive teeth are used to mesh with the drive tooth grooves. When the buffer hinge is relatively open and closed, the buffer is compressed or released by the relative swing of the first linkage in a gear transmission manner, thereby realizing that the buffer provides assistance when the buffer hinge is relatively open and provides a buffering effect when the buffer hinge is relatively closed.

[0009] Compared with the prior art, the cup-in-cup buffer hinge of the present invention, by circumferentially setting several driving teeth at the end of the driving arm of the first link and correspondingly setting meshable driving tooth grooves on the top of the driving seats on both sides of the buffer, allows the driving arm to smoothly drive the buffer through the symmetrical gear meshing on both sides, transforming the traditional single-sided line contact sliding friction into double-sided synchronous gear transmission. This not only completely eliminates the wear caused by sliding friction and greatly improves the hinge's lifespan and reliability, but also ensures that the driving method of simultaneous force on both sides distributes the force evenly on the entire buffer, avoiding uneven loading and jamming, and ensuring that the driving force on the buffer is more stable and smooth. Thus, while maintaining the structural strength and load-bearing capacity, the assistance and buffering effect of the opening and closing process is more stable and quieter.

[0010] Furthermore, the top of the drive seat is provided with at least two drive tooth grooves, and the end of the drive arm is axially provided with at least two corresponding drive teeth. When the inner cup buffer hinge is open, the piston rod of the buffer remains extended, and the drive teeth face opposite directions to the piston rod. By setting at least two drive tooth grooves to mesh with the drive teeth, and making the drive teeth face opposite directions to the piston rod extension direction when open, the contact area and meshing stability of the gear transmission are significantly increased. This ensures that the driving force can be continuously and reliably transmitted through multi-tooth meshing throughout the entire opening and closing process of the hinge, especially in the initial stage of opening when the force is relatively large. This effectively avoids the skipping of teeth or stress concentration that may occur with single-tooth meshing, thereby further enhancing the smoothness of the transmission and the reliability of the buffer operation.

[0011] Furthermore, the outer contour of the buffer cylinder is cylindrical, and it also includes a clamping component. The clamping component includes a bottom-opening clamping ring and deformation-fastening parts located at the lower ends of both sides of the clamping ring. The bottom of the cup cavity has a locking inlet corresponding to each deformation-fastening part. The clamping component covers the top and sides of the buffer through the clamping ring, allowing the deformation-fastening parts on both sides to pass through the locking inlets to the bottom of the hinge cup. After bending, the deformation-fastening parts deform and engage with the bottom of the hinge cup, allowing the buffer to slide within the cup cavity. With this arrangement, the buffer can be slidably positioned within the cup cavity. By using a clamping device with a bottom-opening locking ring and two deformable fastening parts on both sides, the top and sides of the cylindrical buffer are covered. The deformation fastening parts are then bent and locked to the bottom of the hinge cup through a pre-set locking inlet. This achieves a method of installation where the buffer is both securely locked in the cup cavity and can slide axially. This not only makes full use of the outer contour features of the cylindrical cylinder and simplifies the assembly structure, but also achieves screwless quick installation and reliable fixation through the deformable fastening parts, effectively avoiding loosening and wobble of the buffer during long-term sliding.

[0012] Furthermore, the hinge base includes a hinge cover and a hinge base. The hinge cover is rotatably connected to the connecting rod assembly, and the hinge cover and the hinge base are connected by a sliding adjustment structure. The sliding adjustment structure is used to adjust the relative position between the hinge cover and the hinge base along the length direction. By designing the hinge base as a hinge cover and hinge base connected by a sliding adjustment structure, the rotatably connected part of the hinge cover and the connecting rod assembly can be adjusted in position relative to the hinge base along the length direction. This achieves the function of fine adjustment of the relative position between the door panel and the cabinet without changing the main structure and installation method of the hinge, improving the installation adaptability and ease of use of the hinge, facilitating the compensation of processing or assembly errors, and ensuring the overall flatness and aesthetics of the door panel when closed.

[0013] Furthermore, the sliding adjustment structure includes a longitudinal guide hole with an opening at the front of the top of the hinge base, a transverse oblong hole with an opening at the rear of the top of the hinge base, a guide member, and an adjustment drive member. The guide member has a threaded portion on its upper outer periphery and a guide portion at its bottom that slides with the longitudinal guide hole. The guide member is threadedly engaged with the threaded hole of the hinge cover through the threaded portion. The adjustment drive member is installed in the mounting hole of the hinge cover. The bottom of the adjustment drive member has a drive post that engages with the transverse oblong hole. The drive post is eccentrically positioned at the bottom of the adjustment drive member. By rotating the adjustment drive member, the drive post can drive the hinge. The hinge base moves relative to the hinge cover in the longitudinal direction, thereby adjusting the relative position between the hinge cover and the hinge base along the length direction. With this configuration, and by setting a sliding adjustment structure consisting of a longitudinal guide hole, a transverse waist-shaped hole, a guide with a threaded part and a guide part, and an adjustment drive with an eccentric drive column at the bottom, the user only needs to turn the adjustment drive to drive the hinge base to slide back and forth relative to the hinge cover stably and accurately along the longitudinal guide hole through the action of its eccentric drive column in the transverse waist-shaped hole. This achieves convenient and fine-tuning of the hinge in the depth direction of the door panel after installation, and the adjustment process is smooth and the structure is compact and reliable.

[0014] Furthermore, the top of the adjusting drive component extends into the mounting hole, and the top of the adjusting part is provided with a cross hole or a flat hole. By setting an adjusting part on the top of the adjusting drive component that extends into the mounting hole and has a cross hole or a flat hole, a standard and easy-to-apply tool interface is provided for the adjustment operation. This allows users to conveniently and accurately turn the adjusting drive component using common screwdrivers and other tools, thereby significantly improving the construction convenience and adjustment accuracy of hinge position fine adjustment, avoiding the inconvenience and slippage of manual operation, and ensuring that the adjustment process is efficient and reliable.

[0015] Furthermore, the guide part is provided with a guide groove on its outer periphery, and the guide part is inserted into the longitudinal guide hole through the guide groove. With this configuration, by providing a guide groove on the outer periphery of the guide part, it can be accurately inserted into the longitudinal guide hole of the hinge base in a snap-fit ​​sliding manner. This not only realizes the rapid alignment and assembly between the guide part and the guide hole, but also restricts the relative rotation of the two on the horizontal plane by utilizing the cooperation between the guide groove and the guide hole wall. This ensures that the hinge base can slide smoothly along the preset longitudinal guide path during subsequent adjustment, thereby improving the stability and positional accuracy of the adjustment structure.

[0016] Furthermore, the bottom opening of the hinge cover forms a movable cavity, and longitudinally arranged elongated holes are provided on both sides of the bottom of the hinge. The elongated holes are located behind the adjusting drive component. The side of the hinge cover is placed in the elongated hole of the hinge base through a pin, so that the two form a relative connection. The guide component further connects the hinge cover and the hinge base, so that the adjusting drive component is clamped between the hinge cover and the hinge base. With this configuration, by providing longitudinal elongated holes on both sides of the hinge base behind the adjusting drive component, and using pins to connect the hinge cover to the elongated holes, combined with the connecting function of the guide component, a reliable longitudinal movable connection is formed between the hinge cover and the hinge base on both the front and rear sides of the adjusting drive component. This provides more stable and balanced support and guidance for both during the adjustment process, effectively preventing the deviation or jamming that may occur due to single-point force, and ensuring the smoothness and accuracy of the depth adjustment action.

[0017] Furthermore, it also includes a first decorative cover, which is used to cover the upper side of the hinge cover to cover the longitudinal guide hole and the transverse waist-shaped hole; the hinge base has a rear end opening, and the hinge base is equipped with a rear cover for fitting onto its rear end; with this arrangement, by providing a first decorative cover to cover the upper side of the hinge cover, the openings of the adjustment structure such as the longitudinal guide hole and the transverse waist-shaped hole can be effectively covered, making the hinge look neater and more beautiful after installation, while preventing dust and foreign objects from entering the interior and affecting the sensitivity and service life of the adjustment mechanism, thus improving the overall integrity and protection of the product while ensuring convenient and usable adjustment functions.

[0018] Furthermore, the hinge cup has connecting edges on both sides, and connecting holes are provided on the connecting edges. It also includes a second decorative cover, which is used to cover the connecting holes on the upper side of the hinge cup. With this configuration, by providing a second decorative cover to cover the upper side of the hinge cup, the connecting holes on the connecting edges of the hinge cup can be completely covered. This not only significantly improves the visual integrity and aesthetics of the hinge after installation and avoids the exposure of the mounting screws, but also effectively prevents dust, moisture, etc. from entering the interior of the hinge cup through the connecting holes and causing pollution or corrosion to the buffer and transmission mechanism. Thus, while ensuring a stable connection, it enhances the protective performance and service life of the hinge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal buffer hinge of the cup.

[0020] Figure 2 This is a cross-sectional view of the internal buffer hinge of the cup.

[0021] Figure 3 This is a schematic view of the hinge cup and connecting rod assembly.

[0022] Figure 4 This is an exploded view of the internal buffer hinge of the cup.

[0023] Labeling: 1. Hinge cup; 2. Hinge seat; 3. Linkage assembly; 4. Buffer; 11. Cup cavity; 31. First link; 32. Second link; 33. Drive arm; 34. Drive gear; 41. Drive seat; 42. Drive gear groove; 43. Piston rod; 321. Connecting seat; 322. Limiting shaft; 5. Clamp; 51. Clamping ring; 52. Deformation fastening part; 53. Clamping inlet; 21. Hinge cover; 22. Hinge base; 23. Seat cavity; 24. Bottom cover; 51. Longitudinal guide hole; 52. Transverse waist-shaped hole; 53. Adjustment drive component; 54. Threaded part; 55. Guide part; 56. Mounting hole; 531. Drive column; 532. Adjustment part; 551. Guide groove; 211. Movable cavity; 221. Long strip hole; 61. First decorative cover; 62. Second decorative cover; 63. Rear cover; 12. Connecting edge; 38. Torsion spring; 39. First rotating shaft; 50. Guide component. Detailed Implementation

[0024] The specific embodiments of the present invention are described below with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the present invention.

[0025] See Figures 1 to 4 The cup-in-cup buffer hinge of the present invention includes a hinge cup 1, a hinge seat 2, a connecting rod assembly 3, and a buffer 4.

[0026] The hinged cup 1 has a cup cavity 11 with a top opening.

[0027] The hinge seat 2 is rotatably connected to the cup cavity 11 of the hinge cup 1 via the connecting rod assembly 3 on one side.

[0028] The linkage assembly 3 includes a first linkage 31, a second linkage 32, and a torsion spring 38. Drive arms 33 extend from both sides of one end of the first linkage 31. The first linkage 31 extends into the cup cavity 11 through the two drive arms 33 and is rotatably connected to the two opposite side walls of the cup cavity 11. The other end of the first linkage 31 is rotatably connected to the hinge seat 2 through the first rotating shaft 39. The two ends of the second linkage 32 are connected to the hinge seat 2 and the hinge cup 1, respectively. The torsion spring 38 is sleeved on the first rotating shaft 39, and the two spring arms of the torsion spring 38 abut against the hinge seat 2 and the second linkage 32, respectively. Several drive teeth 34 are provided circumferentially at the ends of the two drive arms 33.

[0029] The buffer 4 is slidably placed in the cup cavity 11 and its output rod abuts against the rear wall of the cup cavity 11. The buffer 4 is provided with drive seats 41 on both sides. The top of the drive seats 41 is provided with a number of drive tooth grooves 42 along the length direction of the buffer 4. The drive teeth 34 are used to mesh with the drive tooth grooves 42. When the buffer hinge is relatively open and closed, the buffer 4 is compressed or released by the relative swing of the first linkage 31 through gear transmission. This enables the buffer 4 to provide assistance when the buffer hinge is relatively open and to provide buffering when the buffer hinge is relatively closed.

[0030] Compared with the prior art, the cup-in-cup buffer hinge of the present invention, by circumferentially setting a plurality of driving teeth 34 at the end of the driving arm 33 of the first link 31, and correspondingly setting meshable driving tooth grooves 42 on the top of the driving seats 41 on both sides of the buffer 4, allows the driving arm 33 to smoothly drive the buffer 4 through the symmetrical gear meshing on both sides, transforming the traditional single-sided line contact sliding friction into double-sided synchronous gear transmission. This not only completely eliminates the wear caused by sliding friction and greatly improves the hinge's lifespan and reliability, but also ensures that the driving force is evenly distributed on the entire buffer 4 by the simultaneous force on both sides, avoiding uneven loading and jamming, and ensuring that the driving force on the buffer 4 is more stable and smooth. Thus, while maintaining the structural strength and load-bearing capacity, the assistance and buffering effect of the opening and closing process is more stable and quiet.

[0031] See Figures 1 to 4 In one embodiment, the drive seat 41 and the buffer 4 are an integral structure. By setting the drive seat 41 and the buffer 4 as an integral structure, the gap and loosening risk that may exist between the two due to the assembly connection are eliminated, ensuring that the drive tooth 34 groove 42 and the buffer 4 cylinder have higher structural rigidity and positional accuracy, thereby making the gear transmission process more stable and reliable, effectively reducing transmission impact and noise, and further improving the durability and working consistency of the entire buffer drive system.

[0032] See Figures 1 to 4In one embodiment, the top of the drive seat 41 is provided with at least two drive tooth grooves 42, and the end of the drive arm 33 is axially provided with at least two corresponding drive teeth 34. When the inner cup buffer hinge is in the open state, the piston rod 43 of the buffer 4 remains in the extended state, and the drive teeth 34 are oriented in the opposite direction to the piston rod 43. By setting at least two drive tooth grooves 42 meshing with the drive teeth 34, and making the drive teeth 34 oriented in the opposite direction to the extended direction of the piston rod 43 in the open state, the contact area and meshing stability of the gear transmission are significantly increased. This ensures that the driving force can be continuously and reliably transmitted through multi-tooth meshing during the entire opening and closing process of the hinge, especially in the initial opening stage where the force is large. This effectively avoids the skipping of teeth or stress concentration that may occur with single-tooth meshing, thereby enhancing the smoothness of the transmission and the reliability of the buffer 4 in one embodiment.

[0033] See Figures 1 to 4 In one embodiment, one end of the second connecting rod 32 is rotatably connected to the hinge cup 1, and the other end of the second connecting rod 32 is provided with a connecting seat 321. The connecting seat 321 is fixedly connected to the hinge seat 2 through two limiting shafts 322.

[0034] See Figures 1 to 4 In one embodiment, the outer contour of the cylinder of the buffer 4 is cylindrical, and it also includes a clamping member 5. The clamping member 5 includes a bottom-opening clamping ring 51 and deformation fastening parts 52 located at the lower ends of both sides of the clamping ring 51. The bottom of the cup cavity 11 is provided with a locking inlet 53 corresponding to each deformation fastening part 52. The clamping member 5 covers the top and sides of the buffer 4 through the clamping ring 51, so that the deformation fastening parts 52 on both sides pass through the locking inlet 53 to the bottom of the hinge cup 1, and then deforms and locks into the bottom of the hinge cup 1 by bending. This allows the buffer 4 to be slidably placed in the cup cavity 11. By setting up a clamping member 5 with a bottom-opening clamping ring 51 and two deformable fastening parts 52 on both sides, the clamping member 5 covers the top and sides of the cylindrical buffer 4. By using the pre-set clamping inlet 53 at the bottom of the hinge cup 1, the deformable fastening part 52 passes through and is bent and deformed to clamp the bottom of the hinge cup 1. This achieves a method of installation in which the buffer 4 is both firmly clamped in the cup cavity 11 and can slide axially. This not only makes full use of the outer contour features of the cylindrical cylinder and simplifies the assembly structure, but also achieves screwless quick installation and reliable fixation through the deformable fastening part, effectively avoiding loosening and wobble of the buffer 4 during long-term sliding.

[0035] See Figures 1 to 4In one embodiment, the hinge base 2 includes a hinge cover 21 and a hinge base 22. The hinge cover 21 is rotatably connected to the connecting rod assembly 3. The hinge cover 21 and the hinge base 22 are connected by a sliding adjustment structure. The sliding adjustment structure is used to adjust the relative position of the hinge cover 21 and the hinge base 22 along the length direction. By designing the hinge base 2 as a hinge cover 21 and a hinge base 22 connected by a sliding adjustment structure, the rotatably connected part of the hinge cover 21 and the connecting rod assembly 3 can be adjusted relative to the hinge base 22 along the length direction. This achieves the function of fine adjustment of the relative position between the door panel and the cabinet without changing the main structure and installation method of the hinge, improving the installation adaptability and ease of use of the hinge, facilitating the compensation of processing or assembly errors, and ensuring the overall flatness and aesthetics of the door panel when closed.

[0036] See Figures 1 to 4 In one embodiment, the sliding adjustment structure includes a longitudinal guide hole 51 with an opening at the front top of the hinge base 22, a transverse waist-shaped hole 52 with an opening at the rear top of the hinge base 22, a guide member 50, and an adjustment drive member 53. The guide member 50 has a threaded portion 54 on its upper outer periphery and a guide portion 55 at its bottom that slides with the longitudinal guide hole 51. The guide member 50 is threadedly engaged with the threaded hole of the hinge cover 21 through the threaded portion 54. The adjustment drive member 53 is disposed in the mounting hole 56 of the hinge cover 21. The bottom of the adjustment drive member 53 has a drive post 531 that engages with the transverse waist-shaped hole 52. The drive post 531 is eccentrically disposed at the bottom of the adjustment drive member 53. By rotating the adjustment drive member 53, the adjustment can be adjusted. The moving column 531 drives the hinge base 22 to move relative to the hinge cover 21 in the longitudinal direction, thereby adjusting the relative position between the hinge cover 21 and the hinge base 22 in the length direction. With this configuration, and by setting a sliding adjustment structure consisting of a longitudinal guide hole 51, a transverse waist-shaped hole 52, a guide member 50 with a threaded part 54 and a guide part 55, and an adjustment drive member 53 with an eccentric drive column 531 at the bottom, the user only needs to turn the adjustment drive member 53 to drive the hinge base 22 to slide back and forth relative to the hinge cover 21 in a stable and precise manner along the longitudinal guide hole 51 through the action of its eccentric drive column 531 in the transverse waist-shaped hole 52. This achieves convenient and fine-tuning of the hinge in the depth direction of the installed door panel, and the adjustment process is smooth and the structure is compact and reliable.

[0037] See Figures 1 to 4In one embodiment, the top of the adjusting drive member 53 extends into the adjusting part 532 of the mounting hole 56, and the top of the adjusting part 532 is provided with a cross hole or a flat hole. With this configuration, by providing an adjusting part 532 extending to the mounting hole 56 and having a cross hole or a flat hole on the top of the adjusting drive member 53, a standard and easy-to-apply tool interface is provided for the adjustment operation, allowing users to conveniently and accurately turn the adjusting drive member 53 using common screwdrivers and other tools. This significantly improves the construction convenience and adjustment accuracy of hinge position fine adjustment, avoids the inconvenience and slippage of manual operation, and ensures that the adjustment process is efficient and reliable.

[0038] See Figures 1 to 4 In one embodiment, the guide portion 55 is provided with a guide groove 551 on its outer periphery, and the guide portion 55 is inserted into the longitudinal guide hole 51 through the guide groove 551. With this configuration, by providing a guide groove 551 on the outer periphery of the guide portion 55 of the guide member 50, it can be accurately inserted into the longitudinal guide hole 51 of the hinge base 22 in a snap-fit ​​sliding manner. This not only realizes the rapid alignment and assembly between the guide portion 55 and the guide hole, but also restricts the relative rotation of the two on the horizontal plane by utilizing the cooperation between the guide groove 551 and the guide hole wall. This ensures that the hinge base 22 can slide smoothly along the preset longitudinal guide path during subsequent adjustment, thereby improving the stability and positional accuracy of the adjustment structure.

[0039] See Figures 1 to 4 In one embodiment, the hinge cover 21 has an opening at its bottom to form a movable cavity 211. Longitudinal elongated holes 221 are respectively provided on both sides of the hinge bottom. The elongated holes 221 are located behind the adjusting drive member 53. The side of the hinge cover 21 is placed within the elongated holes 221 of the hinge base 22 via a pin, thus forming a relative connection between the two. In one embodiment, the guide member 50 connects the hinge cover 21 and the hinge base 22, causing the adjusting drive member 53 to be sandwiched between the hinge cover 21 and the hinge base 22. This arrangement... The hinge base 22 has longitudinal elongated holes 221 on both sides of the hinge base 22 located behind the adjustment drive 53. The hinge cover 21 is connected to the elongated holes 221 by a pin. With the connection of the guide 50, a reliable longitudinal movable connection is formed between the hinge cover 21 and the hinge base 22 on both the front and rear sides of the adjustment drive 53. This provides more stable and balanced support and guidance for both during the adjustment process, effectively preventing the possible deviation or jamming caused by single-point force, and ensuring the smoothness and accuracy of the depth adjustment action.

[0040] See Figures 1 to 4In one embodiment, a first decorative cover 61 is further included. The first decorative cover 61 is detachably connected to the upper side of the hinge cover 21 via a snap-fit ​​structure. The first decorative cover 61 is used to cover the upper side of the hinge cover 21 to cover the longitudinal guide hole 51 and the transverse waist-shaped hole 52. The hinge base 22 has an opening at its rear end and is equipped with a rear cover 63 for fitting onto its rear end. With this arrangement, by providing the first decorative cover 61 for covering the upper side of the hinge cover 21, the openings of the adjustment structure such as the longitudinal guide hole 51 and the transverse waist-shaped hole 52 can be effectively covered, making the hinge look neater and more beautiful after installation. At the same time, it prevents dust and foreign objects from entering the interior and affecting the sensitivity and service life of the adjustment mechanism. While ensuring the convenient and usable adjustment function, it improves the overall integrity and protection of the product.

[0041] See Figures 1 to 4 In one embodiment, the hinge cup 1 has connecting edges 12 on both sides. The second decorative cover 62 is detachably connected to the upper side of the hinge cup 1 via a snap-fit ​​structure. The connecting edge 12 has a connecting hole and the second decorative cover 62 is used to cover the connecting hole on the upper side of the hinge cup 1. By setting the second decorative cover 62 to cover the upper side of the hinge cup 1, the connecting hole on the connecting edge 12 of the hinge cup 1 can be completely covered. This not only significantly improves the visual integrity and aesthetics of the hinge after installation and avoids the exposure of the mounting screws, but also effectively prevents dust, moisture and other substances from entering the interior of the hinge cup 1 through the connecting hole and causing pollution or corrosion to the buffer 4 and the transmission mechanism. Thus, while ensuring a stable connection, the protective performance and service life of the hinge are enhanced.

[0042] See Figures 1 to 4 In one embodiment, the hinged base 22 has a seat cavity 23 with a bottom opening, and the hinged base 22 is provided with a bottom cover 24 for covering the bottom opening of the seat cavity 23.

[0043] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A cup-internal buffer hinge, characterized in that, include: A hinged cup with a cup cavity that has an opening at the top; The hinged seat is rotatably connected to the cup cavity of the hinge cup via a connecting rod assembly on one side; The linkage assembly includes a first linkage, a second linkage, and a torsion spring. Drive arms extend from both sides of one end of the first linkage. The first linkage extends into the cup cavity through the two drive arms and is rotatably connected to the two opposite side walls of the cup cavity. The other end of the first linkage is rotatably connected to the hinge seat through a first rotating shaft. The two ends of the second linkage are connected to the hinge seat and the hinge cup, respectively. The torsion spring is sleeved on the first rotating shaft, and the two spring arms of the torsion spring abut against the hinge seat and the second linkage, respectively. Several drive teeth are provided circumferentially at the ends of the two drive arms. The buffer is slidably placed inside the cup cavity, with its output rod abutting against the rear wall of the cup cavity. The buffer has a drive seat on each side, and the top of the drive seat has several drive tooth grooves along the length of the buffer. The drive teeth are used to mesh with the drive tooth grooves. When the buffer hinge is relatively open and closed, the buffer is compressed or released by the relative swing of the first linkage in a gear transmission manner, thereby realizing that the buffer provides assistance when the buffer hinge is relatively open and provides a buffering effect when the buffer hinge is relatively closed.

2. The cup-in-cup buffer hinge according to claim 1, characterized in that, The top of the drive seat is provided with at least two drive tooth grooves, and the end of the drive arm is provided with at least two corresponding drive teeth in the axial direction. When the inner cup buffer hinge is in the open state, the piston rod of the buffer remains in the extended state, and the drive teeth are oriented in the opposite direction to the piston rod.

3. The cup-in-cup buffer hinge according to claim 2, characterized in that, The outer contour of the cylinder of the buffer is cylindrical, and it also includes a clamping component. The clamping component includes a bottom-opening clamping ring and deformation fastening parts located at the lower ends of both sides of the clamping ring. The bottom of the cup cavity is provided with a locking inlet for each deformation fastening part. The clamping component covers the top and sides of the buffer through the clamping ring, so that the deformation fastening parts on both sides pass through the locking inlet to the bottom of the hinge cup and are deformed by bending and locked into the bottom of the hinge cup, so that the buffer can be slidably placed in the cup cavity.

4. The cup-in-cup buffer hinge according to claim 1, characterized in that, The hinge base includes a hinge cover and a hinge base. The hinge cover is rotatably connected to the connecting rod assembly. The hinge cover and the hinge base are connected by a sliding adjustment structure, which is used to adjust the relative position between the hinge cover and the hinge base along the length direction.

5. The cup-in-cup buffer hinge according to claim 4, characterized in that, The sliding adjustment structure includes a longitudinal guide hole with an opening at the front of the top of the hinge base, a transverse waist-shaped hole with an opening at the rear of the top of the hinge base, a guide member, and an adjustment drive member. The guide member has a threaded portion on the upper outer periphery and a guide portion at the bottom that slides in cooperation with the longitudinal guide hole. The guide member is threaded in cooperation with the screw hole of the hinge cover through the threaded portion. The adjustment drive is installed in the mounting hole of the hinge cover. The bottom of the adjustment drive is provided with a drive column that mates with the transverse waist-shaped hole. The drive column is eccentrically located at the bottom of the adjustment drive. By rotating the adjustment drive, the drive column can drive the hinge base to move relative to the hinge cover in the longitudinal direction, thereby adjusting the relative position between the hinge cover and the hinge base in the length direction.

6. The cup-in-cup buffer hinge according to claim 5, characterized in that, The top of the adjustment drive extends into the mounting hole, and the top of the adjustment part is provided with a cross hole or a straight hole.

7. The cup-in-cup buffer hinge according to claim 5, characterized in that, The guide part has a guide groove on its outer periphery, and the guide part is inserted into the longitudinal guide hole through the guide groove.

8. The cup-in-cup buffer hinge according to claim 5, characterized in that, The bottom opening of the hinge cover forms a movable cavity. Longitudinal holes are provided on both sides of the bottom of the hinge. The longitudinal holes are located on the rear side of the adjustment drive. The side of the hinge cover is placed in the longitudinal hole of the hinge base through a pin, so that the two are connected relative to each other. The guide further connects the hinge cover and the hinge base, so that the adjustment drive is clamped between the hinge cover and the hinge base.

9. The cup-in-cup buffer hinge according to claim 5, characterized in that, It also includes a first decorative cover, which is used to cover the upper side of the hinged cover to cover the longitudinal guide hole and the transverse waist-shaped hole; The hinged base has an opening at its rear end, and the hinged base is equipped with a rear cover for fitting onto its rear end.

10. The cup-in-cup buffer hinge according to claim 1, characterized in that, The hinge cup has connecting edges on both sides, and connecting holes are provided on the connecting edges. It also includes a second decorative cover, which is used to cover the connecting holes on the upper side of the hinge cup.

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