In-cup cushioned hinge device

Abstract

The utility model belongs to hinge device technical field, the utility model discloses the buffer hinge device in cup, through setting locking mechanism, user can according to actual use demand flexible control buffer assist function state of buffer hinge device in cup, when needing to close buffer assist function, through the control locking control cover of operation and control and push away the part, realizes the automatic locking of buffer when hinge device closes, and when needing to open buffer assist function, through the control locking control cover of operation and control and push away the part in reverse can make the lock catch to separate locking seat path to remove buffer locking state, effectively solved the limitation of the unadjustable state of traditional buffer hinge device buffer assist effect, both retained the inherent structural stability and high bearing capacity of buffer hinge device, and through the buffer mode of switchable, the applicability is improved significantly, realizes the unity of functionality and convenient operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of hinge devices, specifically a cup-in-cup buffer hinge device. Background Technology

[0002] Cup-type soft-close hinges are widely used in furniture such as cabinets and wardrobes due to their robust structure and high load-bearing capacity. To enhance the user experience, modern furniture generally requires hinges to have a soft-close function to achieve a quiet and smooth closing effect and reduce impact damage. Currently, most mainstream cup-type soft-close hinges on the market adopt a built-in damper structure. However, the soft-close effect of these products is usually fixed and cannot be adjusted to open or close according to the user's needs. Utility Model Content

[0003] The purpose of this invention is to overcome the limitation of existing cup-in-cup buffer hinge devices that cannot open or close the buffering assistance function according to the user's needs, and to provide a cup-in-cup buffer hinge device that can open or close the buffering assistance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An in-cup buffer hinge device includes a hinge cup, a buffer, a hinge seat, and a locking mechanism.

[0006] The hinged cup includes a cup cavity extending to the bottom, the cup cavity having openings at the top and rear, and a removable buffer mounting bracket located on one side of the cup cavity in the arcuate guide groove.

[0007] The buffer is installed inside the buffer mounting bracket and assembled on the side of the hinge cup along with the buffer mounting bracket. The output rod of the buffer is installed and fixed in the snap hole of the buffer mounting bracket. A locking seat is provided on the upper side of the buffer cylinder.

[0008] The hinge seat is rotatably connected to the cup cavity of the hinge cup via a linkage assembly on one side. The linkage assembly is equipped with an outwardly extending push rod, which is used to cooperate with the rear side of the buffer to provide assistance when the hinge device is relatively open and to provide a buffering effect when the hinge device is relatively closed.

[0009] The locking mechanism includes a locking frame, a latch, a locking control cover, and a locking clearance hole located on one side of the top of the hinge cup. The locking frame is set in the locking clearance hole. The latch is connected to the adapter hole of the buffer mounting bracket via a pivot. The latch includes a push-stop part at the top and a locking pin at the bottom. A guide slope is provided on the rear side of the bottom of the locking pin. The locking control cover is installed on the upper side of the locking frame. The locking control cover has an operating part that extends through the locking clearance hole to one side of the push-stop part. By operating the locking control cover to move the push-stop part, the locking pin can be tilted forward and inserted into the movement path of the locking seat. When the hinge device is relatively closed, the push rod pushes the locking seat of the buffer to be guided by the guide surface and locked into the front side of the locking pin, thereby locking the buffer and realizing the buffering and assisting function of closing the buffer. By operating the locking control cover in the opposite direction to move the push-stop part, the locking pin can be disengaged from the movement path of the locking seat, thereby unlocking the buffer and realizing the buffering and assisting function of opening the buffer.

[0010] Compared with existing technologies, the cup-in-cup buffer hinge device of this utility model, by setting a locking mechanism, allows users to flexibly control the buffer assist function of the cup-in-cup buffer hinge device according to actual usage needs. When it is necessary to turn off the buffer assist function, the user can operate the locking control cover to push the stop part, so that the buffer automatically locks when the hinge device is closed. When it is necessary to turn on the buffer assist function, the user can operate the locking control cover in the opposite direction to push the stop part, so that the lock can disengage from the locking seat path and release the buffer from the locked state. This effectively solves the limitation of the traditional buffer hinge device's buffer assist effect not being adjustable. It retains the inherent structural stability and high load-bearing capacity of the buffer hinge device, and significantly improves its applicability through the switchable buffer mode, achieving a unity of functionality and ease of operation.

[0011] Furthermore, the locking frame has a downwardly extending elastic abutment on the output rod side near the buffer. The latch is located behind the elastic abutment. When the locking control cover is reversed and the push-block is moved, the locking pin disengages from the movement path of the locking seat and abuts against the elastic abutment. The elastic abutment provides elastic assistance for the locking pin to enter the movement path of the locking seat next time. By setting the locking frame with an elastic abutment, elastic assistance is provided for the locking pin to reset after reverse operation. This effectively avoids rigid collisions or friction jamming between the locking pin and surrounding structures when it resets to the locked state, ensuring that it can accurately and smoothly return to the locked position each time, thus improving the overall reliability of the mechanism.

[0012] Furthermore, the inner side of the locking frame is provided with a limiting groove that mates with the moving direction of the locking control cover. One side of the operating part is provided with a limiting spring that mates with the limiting groove. The limiting spring elastically engages with the limiting groove. The width of the limiting groove is greater than the width of the limiting spring. When the limiting spring moves to one side of the limiting groove, the buffer is in a locked state; when it moves to the other side, the buffer is in an unlocked state. This design, through the sliding engagement of the limiting groove and the limiting spring, provides clear and stable mechanical guidance and travel limits for the reciprocating movement of the locking control cover. This allows the user to obtain a clear feel and precise feedback when switching buffer functions, effectively preventing unclear locking mechanism states due to insufficient or excessive operation. This ensures the accuracy and reliability of locking and unlocking actions, improving the user's operating experience.

[0013] Furthermore, the locking frame has a spring-loaded latch extending towards the operating part, and the bottom of the locking control cover is provided with a limiting latch that cooperates with the spring-loaded latch. When the limiting latch moves to one side of the limiting groove, the limiting latch engages with one side of the spring-loaded latch; when the limiting latch moves to the other side of the limiting groove, the limiting latch engages with the other side of the spring-loaded latch. With this configuration, by adding a cooperating structure between the spring-loaded latch and the limiting latch, based on the original mechanical guide, a clear tactile positioning and self-locking force are provided for the two endpoint positions of the locking control cover in the locked and unlocked states. This effectively prevents the cover from spontaneously shifting due to vibration or accidental touch during daily use, thereby ensuring the stability and certainty of the buffer function state, and further improving the accuracy of operation and user experience.

[0014] Furthermore, the bottom outer periphery of the locking frame is provided with several fixing buckles, and the locking frame is fixed by fastening the fixing buckles from the top to the bottom edge of the locking clearance hole; with this setting, the installation method of the locking frame is simple and convenient to assemble.

[0015] Furthermore, the buffer mounting bracket has an inner open receiving cavity, and a vertically arranged snap-fit ​​rod is provided on the front side of the receiving cavity. A snap-fit ​​hole is provided on the snap-fit ​​rod and has an outer open side. The output rod of the buffer snaps into the snap-fit ​​hole. A limiting block is provided at the bottom of the receiving cavity at the opening, and the outer side of the bottom of the buffer abuts against the inner side of the limiting block. This design provides the buffer with an independent, stable, and easy-to-assemble dedicated mounting base. The snap-fit ​​hole design allows the output rod of the buffer to be quickly and accurately snapped into place, significantly simplifying the assembly process, improving production efficiency, and ensuring the stability and consistency of the buffer's installation position during long-term use, thereby guaranteeing the reliable performance of its buffering and assist functions.

[0016] Furthermore, the cup-shaped body has a slot on the front and a insertion hole on the rear. The buffer mounting bracket has a hook corresponding to the slot and an insertion part corresponding to the insertion hole. After the rear part of the buffer mounting bracket is inserted into the insertion slot through the insertion part, its front part is fastened in the slot through the hook to achieve the installation and fixation of the buffer mounting bracket. Through this design, the combination of the slot, insertion hole and corresponding hook and insertion part enables the buffer mounting bracket to be quickly and accurately positioned and firmly fixed on the side of the cup-shaped body. Its "rear insertion and front fastening" installation method is simple to operate and reliable to connect, effectively preventing the mounting bracket from loosening or shifting under force, ensuring the stability of the overall installation structure of the buffer, and thus providing a solid foundation for the long-term stable operation of the hinge. Attached Figure Description

[0017] Figure 1 A diagram showing the open state of the internal buffer hinge mechanism. Figure 1 .

[0018] Figure 2 A diagram showing the open state of the internal buffer hinge mechanism. Figure 2 .

[0019] Figure 3 This is a schematic diagram showing the cup's internal buffer hinge device in the closed state and the buffer in the unlocked state.

[0020] Figure 4 The picture shows Figure 3 A magnified view of a portion of region A in the middle.

[0021] Figure 5 This is a schematic diagram showing the cup's internal buffer hinge device in the open state and the buffer in the locked state.

[0022] Figure 6 Explosion of the locking mechanism Figure 1 .

[0023] Figure 7 Explosion of the locking mechanism Figure 2 .

[0024] Labeling Explanation: 1. Hinge Cup; 2. Buffer; 3. Hinge Seat; 4. Locking Mechanism; 11. Cup Groove; 12. Connecting Edge; 13. Cup Cavity; 14. Arc Guide Groove; 15. Buffer Placement Area; 21. Output Rod; 22. Locking Seat; 31. Push Rod; 32. First Link; 33. Second Link; 41. Locking Frame; 42. Locking Buckle; 43. Locking Control Cover; 44. Locking Avoidance Hole; 421. Push Block; 422. Locking Pillar; 423. Guide Inclined Surface; 431. Operating Part; 411. Elastic Abutment; 412. Limiting Groove; 432. Limiting Block; 413. Spring Buckle; 439. Limiting Buckle; 434. Buffer Mounting Frame; 151. Receiving Cavity; 152. Snap-in Rod; 153. Snap Hole; 154. Limiting Block; 155. Snap Slot; 113. Insertion Hole; 114. Snap Buckle; 156. Snap-in Part; 157. Connecting Hole; 121. Rotating Shaft; 420. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] See Figures 1 to 7 The present invention provides a cup-in-cup buffer hinge device, comprising a hinge cup 1, a buffer 2, a hinge seat 3, and a locking mechanism 4.

[0027] The hinged cup 1 includes a cup groove body 11 and a connecting edge 12 extending to both sides from the upper end of the cup groove body 11. The cup groove body 11 has a cup cavity 13 with openings at the upper side and rear end. A circular arc guide groove 14 penetrating the outer side is provided on one side of the cup cavity 13. A buffer placement area 15 is provided on one side of the cup groove body 11 located in the circular arc guide groove 14. The buffer placement area 15 is provided with a detachable buffer mounting bracket 151.

[0028] The buffer 2 is installed inside the buffer mounting bracket 151 and is assembled on the side of the hinge cup 1 along with the buffer mounting bracket 151. The output rod 21 of the buffer 2 is installed in the snap hole 154 of the buffer mounting bracket 151 for placement and fixation. The upper side of the cylinder body of the buffer 2 is provided with a locking seat 22.

[0029] The hinge seat 3 is rotatably connected to the cup cavity 13 of the hinge cup 1 via a connecting rod assembly on one side. The connecting rod assembly is equipped with a push rod 31 extending outward through an arc guide groove 14. The push rod 31 is used to cooperate with the rear side of the buffer 2 to provide assistance when the hinge device is relatively open and to provide a buffering effect when the hinge device is relatively closed.

[0030] Locking mechanism 4 includes a locking frame 41, a latch 42, a locking control cover 43, and a locking clearance hole 44 located on one side of the top of hinge cup 1. The locking frame 41 is disposed in the locking clearance hole 44. The latch 42 is connected to the adapter hole of the buffer mounting bracket 151 via a pivot 420. The latch 42 includes a push-block part 421 located at the upper part and a locking pin 422 located at the lower part. A guide slope 423 is provided on the rear side of the bottom of the locking pin 422. The locking control cover 43 is mounted on the upper side of the locking frame 41. The locking control cover 43 has an operating part 4 that extends through the locking clearance hole 44 to one side of the push-block part 421. 31. By manipulating the locking control cover 43 to move the push stop 421, the locking pin 422 can be tilted forward and inserted into the moving path of the locking seat 22. When the hinge device is relatively closed, the push rod 31 pushes the locking seat 22 of the buffer 2 to be guided by the guide surface and locked into the front side of the locking pin 422, thereby locking the buffer 2 and realizing the buffering and assisting function of closing the buffer 2. By manipulating the locking control cover 43 in the opposite direction to move the push stop 421, the locking pin 422 can be disengaged from the moving path of the locking seat 22, thereby unlocking the buffer 2 and realizing the buffering and assisting function of opening the buffer 2.

[0031] Compared with existing technologies, the cup-in-cup buffer hinge device of this utility model, through the setting of a locking mechanism 4, allows users to flexibly control the buffer assist function of the cup-in-cup buffer hinge device according to actual usage needs. When it is necessary to turn off the buffer assist function, the user can operate the locking control cover 43 to move the push stop 421, so that the buffer 2 is automatically locked when the hinge device is closed. When it is necessary to turn on the buffer assist function, the user can operate the locking control cover 43 in the opposite direction to move the push stop 421, so that the latch 42 is disengaged from the locking seat 22 and the buffer 2 is released from its locked state. This effectively solves the limitation of the traditional buffer hinge device where the buffer assist effect is not adjustable. Meanwhile, the buffer 2 is placed on the buffer placement area 15 outside the hinge cup 1, which avoids the problem of increased overall hinge width caused by traditional built-in dampers. This not only reduces the structural size of the device and optimizes the appearance, but also uses the push rod 31 to cooperate with the rear side of the buffer 2 to achieve assistance and buffering during opening and closing. Its locking mechanism 4 directly moves the latch 42 through the locking control cover 43 and the locking clearance hole 44. The guide slope 423 cooperates with the locking seat 22 to automatically lock the buffer 2 when it is closed. The operation is intuitive and simple, and the overall structure is compact and reasonable. While ensuring stable and reliable buffering performance, it significantly improves space utilization and aesthetics.

[0032] See Figures 1 to 7In one embodiment, the locking frame 41 has a downwardly extending elastic abutment 411 on the side near the output rod 21 of the buffer 2. The latch 42 is located behind the elastic abutment 411. When the locking control cover 43 is reversed and the push block 421 is moved, the locking pin 422 disengages from the movement path of the locking seat 22 and abuts against the elastic abutment 411. The elastic abutment 411 is used to provide elastic assistance for the locking pin 422 to enter the movement path of the locking seat 22 next time. With this setting, by setting the elastic abutment 411 on the locking frame 41, elastic assistance is provided for the locking pin 422 to reset after reverse operation. This can effectively avoid rigid collision or friction jamming between the locking pin 422 and the surrounding structure when it resets to the locked state, ensuring that it can accurately and smoothly return to the locked state position every time, thus improving the overall reliability of the mechanism.

[0033] See Figures 1 to 7 In one embodiment, the elastic abutment 411 is an arc structure extending toward one side of the latch 42; with this configuration, the elastic abutment 411 has a simple structure and provides a good elastic reset effect.

[0034] See Figures 1 to 7 In one embodiment, the inner side of the locking frame 41 is provided with a limiting groove 412 that cooperates with the moving direction of the locking control cover 43. One side of the operating part 431 is provided with a limiting spring buckle 432 that cooperates with the limiting groove 412. The limiting spring buckle 432 elastically engages within the limiting groove 412. The width of the limiting groove 412 is greater than the width of the limiting spring buckle 432. When the limiting spring buckle 432 moves to one side of the limiting groove 412, it corresponds to the locked state of the buffer 2. The other side corresponds to the unlocked state of the buffer 2. With this setting, the sliding cooperation design of the limiting groove 412 and the limiting spring 432 provides a clear and stable mechanical guide and stroke limit for the reciprocating motion of the locking control cover 43. This allows the user to get a clear feel and appropriate feedback when switching the buffer function state, effectively preventing the problem of unclear state of the locking mechanism 4 due to insufficient or excessive operation. This ensures the accuracy and reliability of the locking and unlocking actions and improves the user's operating experience.

[0035] See Figures 1 to 7In one embodiment, a spring buckle 413 extends from the inner side of the locking frame 41 towards the operating part 431. The bottom of the locking control cover 43 is provided with a limiting buckle 439 that cooperates with the spring buckle 413. When the limiting spring buckle 432 moves to one side of the limiting groove 412, the limiting buckle 439 engages with one side of the spring buckle 413. When the limiting spring buckle 432 moves to the other side of the limiting groove 412, the limiting buckle 439 engages with the other side of the spring buckle 413. With this configuration, by adding the cooperating structure of the spring buckle 413 and the limiting buckle 439, based on the original mechanical guidance, a clear tactile positioning and self-locking force are provided for the two endpoint positions of the locking control cover 43 in the locked and unlocked states. This effectively prevents the cover from spontaneously shifting due to vibration or accidental touch during daily use, thereby ensuring the stability and certainty of the buffer function state and further improving the accuracy of operation and user experience.

[0036] See Figures 1 to 7 In one embodiment, the locking frame 41 is provided with a plurality of fixing buckles 434 on the outer periphery of its bottom. The locking frame 41 is fixed by fastening the fixing buckles 434 from the top to the bottom edge of the locking clearance hole 44. With this arrangement, the installation of the locking frame 41 is simple and convenient to assemble.

[0037] See Figures 1 to 7 In one embodiment, the push-block part 421 is arranged opposite to the other push-block part 422 at an obtuse angle. By setting the push-block part 421 of the latch 42 and the locking pin 422 at an obtuse angle, the force transmission path is optimized. When the locking control cover 43 moves the push-block part 421, the force can be more effectively converted into a rotational torque that drives the locking pin 422 to tilt into or out of the locking path. This not only reduces the force required for operation and makes the operation more effortless and smooth, but also enhances the stability and response speed of the movement trajectory of the locking pin 422, and improves the overall sensitivity and reliability of the locking mechanism 4.

[0038] See Figures 1 to 7In one embodiment, the buffer mounting bracket 151 has an inner opening accommodating cavity 152, and a vertically arranged snap-fit ​​rod 153 is provided on the front side of the accommodating cavity 152. A snap-fit ​​hole 154 is provided on the snap-fit ​​rod 153 and has an outer opening. The output rod 21 of the buffer 2 is snapped into the snap-fit ​​hole 154. A limiting block 155 is provided at the bottom of the opening of the accommodating cavity 152, and the outer bottom of the buffer 2 abuts against the inner side of the limiting block 155. With this configuration, the buffer 2 is provided with an independent, stable and easy-to-assemble dedicated mounting base. The design of the snap-fit ​​hole 154 allows the output rod 21 of the buffer 2 to be snapped in and fixed quickly and accurately. This not only significantly simplifies the assembly process and improves production efficiency, but also ensures the stability and consistency of the installation position of the buffer 2 during long-term use, thereby ensuring the reliable performance of its buffering and assist functions.

[0039] See Figures 1 to 7 In one embodiment, the cup-shaped body 11 has a front-side slot (not shown) and a rear-side insertion hole 114 on its side. The buffer mounting bracket 151 has a hook 156 corresponding to the slot and an insertion part 157 corresponding to the insertion hole 114. After the rear part of the buffer mounting bracket 151 is inserted into the insertion slot through the insertion part 157, its front side is fastened in the slot through the hook 156 to achieve the installation and fixation of the buffer mounting bracket 151. With this setting, the cooperation design of the slot, insertion hole 114 and corresponding hook 156 and insertion part 157 realizes the quick, accurate positioning and firm fixation of the buffer mounting bracket 151 on the side of the cup-shaped body 11. Its "rear insertion and front fastening" installation method is simple to operate and reliable to connect, effectively preventing the mounting bracket from loosening or displacing when under force, ensuring the stability of the overall installation structure of the buffer 2, thus providing a solid foundation for the long-term stable operation of the hinge.

[0040] See Figures 1 to 7 In one embodiment, the connecting edge 12 is provided with a connecting hole 121, which is located on the outside of the buffer 2. By setting the connecting hole 121 on the outside of the buffer 2, the outer space of the connecting edge 12 of the hinge cup 1 is effectively utilized, avoiding spatial interference between the connecting hole 121 and the inner buffer 2 and its mounting structure. This makes it more convenient to insert and tighten the connecting screws when the hinge is installed in the cabinet, optimizes the assembly process, and also ensures that the strength of the connecting structure and the realization of the buffer function do not affect each other.

[0041] See Figures 1 to 7 In one embodiment, the linkage assembly includes a first link 32 and a second link 33, which are rotatably connected at both ends to the hinge cup 1 and the hinge seat 3, respectively. The hinge cup 1, the first link 32, the hinge seat 3 and the second link form a four-bar linkage mechanism. The push rod 31 is disposed on the first link 32.

[0042] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A cup-in-cup buffer hinge device, characterized in that, include: A hinged cup includes a cup groove extending to the bottom, the cup groove having a cup cavity with openings at the top and rear end, and a buffer mounting bracket located on one side of the cup groove in the arc guide groove; The buffer is installed in the buffer mounting bracket and assembled on the side of the hinge cup along with the buffer mounting bracket. The output rod of the buffer is installed and fixed in the snap hole of the buffer mounting bracket. A locking seat is provided on the upper side of the buffer cylinder. The hinge seat is rotatably connected to the cup cavity of the hinge cup on one side via a linkage assembly. The linkage assembly is equipped with an outwardly extending push rod, which is used to cooperate with the rear side of the buffer to provide assistance when the hinge device is relatively open and to provide a buffering effect when the hinge device is relatively closed. The locking mechanism includes a locking frame, a latch, a locking control cover, and a locking clearance hole located on one side of the top of the hinge cup. The locking frame is set in the locking clearance hole. The latch is connected to the adapter hole of the buffer mounting bracket via a pivot. The latch includes a push-stop part at the top and a locking pin at the bottom. A guide slope is provided on the rear side of the bottom of the locking pin. The locking control cover is installed on the upper side of the locking frame. The locking control cover has an operating part that extends through the locking clearance hole to one side of the push-stop part. By operating the locking control cover to move the push-stop part, the locking pin can be tilted forward and inserted into the movement path of the locking seat. When the hinge device is relatively closed, the push rod pushes the locking seat of the buffer to be guided by the guide surface and locked into the front side of the locking pin, thereby locking the buffer and realizing the buffering and assisting function of closing the buffer. By operating the locking control cover in the opposite direction to move the push-stop part, the locking pin can be disengaged from the movement path of the locking seat, thereby unlocking the buffer and realizing the buffering and assisting function of opening the buffer.

2. The cup-in-cup buffer hinge device according to claim 1, characterized in that, The locking frame has a downwardly extending elastic abutment on the output rod side near the buffer. The latch is located on the rear side of the elastic abutment. When the locking control cover is pushed in the opposite direction, the locking pin disengages from the movement path of the locking seat and abuts against the elastic abutment. The elastic abutment provides elastic assistance for the locking pin to enter the movement path of the locking seat next time.

3. The cup-in-cup buffer hinge device according to claim 2, characterized in that, The inner side of the locking frame is provided with a limiting groove that matches the moving direction of the locking control cover. One side of the operating part is provided with a limiting snap that matches the limiting groove. The limiting snap is elastically engaged in the limiting groove. The width of the limiting groove is greater than the width of the limiting snap. When the limiting snap moves to one side of the limiting groove, it corresponds to the locking state of the buffer. When the limiting snap moves to the other side of the limiting groove, it corresponds to the unlocking state of the buffer.

4. The cup-in-cup buffer hinge device according to claim 3, characterized in that, The locking frame has a spring-loaded buckle extending from the inner side toward the operating part. The bottom of the locking control cover is provided with a limiting buckle that cooperates with the spring-loaded buckle. When the limiting buckle moves to one side of the limiting groove, the limiting buckle engages with one side of the spring-loaded buckle. When the limiting buckle moves to the other side of the limiting groove, the limiting buckle engages with the other side of the spring-loaded buckle.

5. The cup-in-cup buffer hinge device according to claim 1, characterized in that, The locking frame is provided with several fixing buckles on the outer periphery of its bottom. The locking frame is fixed by fastening the fixing buckles to the bottom edge of the locking clearance hole from the top.

6. The cup-in-cup buffer hinge device according to claim 1, characterized in that, The buffer mounting bracket has an inner opening accommodating cavity. A vertically arranged snap-fit ​​rod is provided on the front side of the accommodating cavity. A snap-fit ​​hole is provided on the snap-fit ​​rod and has an outer opening. The output rod of the buffer is snapped into the snap-fit ​​hole. A limiting block is provided at the bottom of the accommodating cavity at the opening. The bottom outer side of the buffer abuts against the inner side of the limiting block.

7. The cup-in-cup buffer hinge device according to claim 6, characterized in that, The cup holder has a slot on the front and a insertion hole on the rear. The buffer mounting bracket has a hook corresponding to the slot and an insertion part corresponding to the insertion hole. After the rear part of the buffer mounting bracket is inserted into the insertion part, its front side is fastened in the slot by the hook to achieve the installation and fixation of the buffer mounting bracket.

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