A double-link folding screen hinge

Abstract

The application relates to a double-rod type folding screen hinge, which comprises a main plate, one end of the main plate is provided with a middle plate, a connecting rod part is assembled on the middle plate in a rotating mode, the connecting rod part is arranged on the two sides of the middle plate and is provided with two groups of outer shaft sleeves which are arranged at intervals on the sides away from the middle plate, a first connecting part is connected to the outer side of the connecting rod part in a rotating mode, the other side of the first connecting part is provided with two groups of first rotating sleeves which are arranged at intervals, a connecting plate is pivotally connected to the outer side of the first connecting part, and the other side of the connecting plate is used for fixedly connecting a foldable product, a connecting rod sleeve is provided with an opening on one side, and the side provided with the opening is movably covered on the front and back sides of the first rotating sleeve and the second rotating sleeve. Through the above arrangement, the connecting rod structure can be coupled and supported, not only has a continuous and stable torsion force, but also makes the foldable electronic product using the hinge more firm.

Description

Technical Field

[0001] This invention relates to the field of hinge technology, and in particular to a double-link folding screen hinge. Background Technology

[0002] Dual-axis pivots can be used in electronic devices with flexible screens: they connect the two ends of the flexible screen to two relatively rotatable parts of the electronic device, thereby maximizing the display area. For example, Taiwan Patent Publication No. M491324 (corresponding to Chinese Patent No. 201420431101.X) includes a connector with a frame, a first spindle, a second spindle, an axially movable member, and a radially movable member. The axially movable member has a Y-shaped pin inserted into a spiral groove on the second spindle for axial sliding and movement within the frame. This results in the pin being subjected to considerable shear force during the actual rotation of the second spindle, leading to poor structural strength and fatigue resistance, and consequently, a shorter lifespan. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a double-link folding screen hinge.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A double-link folding screen hinge includes:

[0006] A motherboard, wherein a middle plate is provided at one end of the motherboard;

[0007] A connecting rod portion is rotatably mounted on the middle plate on one side. The connecting rod portion is provided in two sets on both sides of the middle plate, and the side away from the middle plate has two sets of outer bushings arranged at intervals.

[0008] The first connecting part has one side rotatably connected to the outside of the connecting rod part, and the other side of the first connecting part has two sets of first rotating sleeves arranged at intervals.

[0009] A connecting plate, one side of which is pivotally connected to the outside of the first connecting part, and the other side is used to fix a foldable product;

[0010] The connecting rod sleeve has an opening on one side, and the side with the opening movably covers the front and rear sides of the first rotating sleeve and the second rotating sleeve.

[0011] To achieve the above technical solution, the connecting plate is used to fix the electronic product, usually by bolting, riveting, or welding. The electronic product can be a laptop or a foldable mobile phone or tablet. When the two sets of connecting plates are respectively connected between the two rotatable parts of the electronic product, when the two sets of connecting plates rotate from 0° to 90° in the same direction, the electronic product rotates from a flat state to a folded state. During the rotation, one side of the connecting rod is rotatably connected to the middle plate, and the other side of the connecting rod is rotatably connected to one side of the first connecting part. The connecting plate is rotatably connected to the other side of the first connecting part. The connecting rod sleeve covers the outside of the first rotating sleeve and the second rotating sleeve. When the connecting rod and the first connecting part receive axial force, the connecting rod sleeve covers the outside to prevent misalignment and increase the structural strength of the connecting rod and the first connecting part against the axial force. This axial force is specifically a torsional force on the two parts of the electronic product. On the other hand, the connecting rod sleeve, the damping rod, and the sliding plate are rotatably connected to the connecting plate coaxially or non-coaxially. During the rotation and fixing process, the damping part generates rotational damping on the damping rod, and the damping rod forms rotational damping on the sliding plate and the connecting rod sleeve.

[0012] The slide is a flat T-shaped slide that fits the slide plate. During rotation, the slide plate slides relative to the slide, limiting and guiding between the main board and the connecting plate. One end of the slide plate is rotatably connected to the main board, and the other end is slidably connected to the connecting plate. The slide plate can also transmit the damping generated by the damping part. The connecting rod sleeve is pivotally connected to the slide plate and the damping rod through the second shaft hole and the rotating rod, further transmitting the damping generated by the damping part. Three damping transmission points are evenly formed in opposite directions along the length of the connecting part, making the rotation process more stable.

[0013] The damping part is formed by combining existing springs, disc springs, or damping friction plates to create rotational damping. A gear is provided at the end of its rotating shaft, and the damping rod is rotatably connected to the connecting plate and meshes with the gear, thereby providing damping during rotation.

[0014] As a preferred embodiment of the present invention, the middle plate is symmetrically provided with two sets of rotating grooves along the length direction, the inner side of the connecting rod is provided with an inner pivot that can be rotatably connected to the rotating groove, the front and rear sides of the middle plate are provided with limiting walls, and at least one of the limiting walls is provided with a first shaft hole for the inner pivot to rotate.

[0015] To achieve the above technical solution, the inner pivot is rotatably connected to the middle plate through the rotating groove, and the inner pivot is rotatably connected to the first shaft hole. When the connecting rod is flattened, it is located between the limiting walls on both sides. When the two sets of limiting walls are flattened, they axially limit the connecting rod. The connecting rod, damping rod and sliding plate are laterally limited by the cover plate on the middle plate.

[0016] As a preferred embodiment of the present invention, three sets of second rotating sleeves are provided on the inner side of the first connecting part. The three sets of second rotating sleeves are respectively located on both sides and the middle of the outer bushing. The second rotating sleeve and the outer bushing are coaxially provided with through holes and pivotally connected with the second shaft rod.

[0017] To achieve the above technical solution, the second rotating sleeve and the outer bushing on one side of the connecting part are staggered and can cover both sides of the outer bushing. On the other side of the connecting part, the first rotating sleeve and the third rotating sleeve are staggered, and the third rotating sleeve and the sleeve seat cover both sides of the first rotating sleeve. With this arrangement, during the rotation of the pivot, a first rotation node is formed at the middle plate and the connecting rod, a second rotation node is formed at the connecting rod and the connecting part, and a third rotation node is formed at the connecting part and the connecting plate. A connecting rod structure is formed through the connecting part and the connecting rod. At the second rotation node, one side of the connecting rod sleeve is coaxially pivotally connected to participate in the second rotation node. On the other side of the connecting rod sleeve, the connecting rod sleeve, the damping rod, and the sliding plate are pivotally connected to form a fourth rotation node. The damping is transmitted to the second rotation node to prevent the shaft from loosening. On the other hand, two sets of linkage-type rotational connection structures are formed between the connecting rod and the middle plate. One set consists of the middle plate to the connecting rod, the connecting rod to the connecting part and the connecting sleeve, and the connecting part to the connecting plate. The second set consists of the middle plate to the damping rod and the sliding plate, the sliding plate to the connecting plate, and the damping rod and the sliding plate to the connecting sleeve. Specifically, the second set of linkage structures can be divided into two groups of linkage structures. One group consists of the middle plate to the sliding plate and the sliding plate to the connecting plate. The other group consists of the middle plate to the sliding plate and the damping rod, and the sliding plate and the damping rod to the connecting sleeve. The connecting sleeve participates in entering the second rotation node of the first linkage structure, thereby coupling the two sets of rotational linkages together and greatly increasing the structural strength.

[0018] In a preferred embodiment of the present invention, the connecting rod sleeve is rotatably covered by the second rotating sleeve, and the connecting rod sleeve includes:

[0019] One connecting edge;

[0020] It is integrally formed on the sides of both ends of the connecting plate;

[0021] The side has a through hole for the second shaft to be rotatably connected to the connecting rod sleeve.

[0022] To achieve the above technical solution, the opening of the connecting rod sleeve forms a rotation space, and the outer bushing and the second rotating sleeve are rotatably connected within this rotation space via the second shaft.

[0023] As a preferred embodiment of the present invention, two sets of third rotating sleeves are provided at intervals on the inner side of the first connecting plate, and a sleeve seat is provided on the first connecting plate at the intervals of the third rotating sleeves. The third rotating sleeves are provided with through holes and the sleeve seats are provided with blind holes. One of the first rotating sleeves is located between the two sets of third rotating sleeves and the other is located between the third rotating sleeve and the sleeve seat. The first rotating sleeve and the third rotating sleeve are pivotally connected by a first shaft extending to the sleeve seat.

[0024] To achieve the above technical solution, the first rotating sleeve and the third rotating sleeve are staggered and rotatably connected by the first shaft to form the third rotating node.

[0025] As a preferred embodiment of the present invention, the connecting rod is sleeved on one side of the opening to form a rotation space, the connecting edge has a gradually inclined and narrowed portion towards the rotation space, the connecting plate has a second clearance portion at the sleeve seat, and a stepped surface is formed between the bottom of the second clearance portion and the connecting plate.

[0026] To achieve the above technical solution, the narrowing section ensures the structural strength between the two sets of sides of the connecting rod sleeve while allowing the first and third rotating sleeves to avoid each other during rotation, thus enabling a more compact structure. The second avoidance section forms a stepped surface, which can abut against the connecting rod sleeve to prevent loosening and misalignment. The second avoidance section itself can avoid the flip-over rotation of the connecting rod sleeve. In the flattened state, one side of the connecting rod sleeve is flush with the connecting plate, and the other side does not exceed the height of the cover plate. In the 90° folded state, the connecting rod sleeve does not exceed the outer side of the vertical angle surface of the middle plate and the connecting plate.

[0027] As a preferred embodiment of the present invention, damping portions are respectively provided on the front and rear sides of the motherboard, the connecting plate is provided with a sliding groove, the sliding groove is slidably connected to a sliding plate, and the sliding end is connected to the damping portion.

[0028] As a preferred embodiment of the present invention, the outer side of the connecting plate is provided with a first mounting groove and a second mounting groove, the opening diameter of the first mounting groove and the second mounting groove on the outer side is smaller than the maximum diameter of the groove body, the first mounting groove and the second mounting groove are both provided with a first locking hole, and the first mounting groove is fixedly connected with a positioning protrusion.

[0029] To achieve the above technical solution, the first locking hole is used to connect with electronic product components, which can be bolted, riveted, or welded. The opening diameter of the first mounting groove and the second mounting groove is smaller than the maximum diameter of the groove body. When installing electronic product components, it can form a limit to resist radial tension, and the positioning protrusion can facilitate installation and positioning.

[0030] As a preferred embodiment of the present invention, a first clearance portion is provided on the side of the connecting rod portion away from the middle plate. The first clearance portion is arc-shaped. The middle plate is detachably covered with a cover plate, and the cover plate has a clearance groove to allow the connecting rod portion and the slide plate to rotate.

[0031] To achieve the above technical solution, the cover plate is detachably mounted on the main plate by bolt connection. Both the cover plate and the connecting plate are provided with clearance grooves. The clearance groove of the connecting plate is used to allow the connecting rod sleeve to enter.

[0032] As a preferred embodiment of the present invention, the middle plate has a transition surface on the side away from the cover plate along the length direction, so that when the connecting plate is in the flat state, the middle plate avoids the connecting rod sleeve, and when the two sets of connecting plates are rotated 90° to form a folded state, the middle plate abuts against the limiting wall.

[0033] In summary, the present invention has the following beneficial effects:

[0034] This invention provides a double-link folding screen hinge. Connecting plates are used to fix the hinge to the electronic product. When two sets of connecting plates are respectively connected between two rotatable parts of the electronic product, the electronic product rotates from a flattened state to a folded state when both sets of connecting plates rotate from 0° to 90° in the same direction. During rotation, one side of the connecting rod is rotatably connected to the middle plate, and the other side of the connecting rod is rotatably connected to one side of the first connecting part. The connecting plate is rotatably connected to the other side of the first connecting part. A connecting rod sleeve covers the outside of the first and second rotating sleeves. When the connecting rod and the first connecting part receive axial force, the connecting rod sleeve covers the outside to prevent misalignment and increase the structural strength of the connecting rod and the first connecting part against axial force. The axial force is specifically a torsional force on both parts of the electronic product. On the other hand, the connecting rod sleeve, damping rod, and sliding plate are coaxially or non-coaxially rotatably connected to the connecting plate. During the rotation and fixing process, the damping part generates rotational damping on the damping rod, and the damping rod forms rotational damping on the sliding plate and connecting rod sleeve, realizing a high-strength connection of the dual-axis pivot, which can achieve a longer service life and a larger force range. The damping attenuation rate is low. The linear connection is achieved through the linkage structure, which has a longer fatigue resistance compared to point-like rotational connections. The linkage structure can be coupled and mutually supported, which not only has a continuous and stable torque, but also makes the folding electronic products using this pivot more robust. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the present invention.

[0037] Figure 2 This is a schematic diagram of the disassembled structure of the present invention.

[0038] Figure 3 This is a schematic diagram of the structure of the present invention from another angle.

[0039] Figure 4 This is a perspective view of the present invention.

[0040] Figure 5 This is a perspective view of the invention from another angle.

[0041] Figure 6 This is a schematic diagram of the damping rod part of the present invention.

[0042] Figure 7 For the present invention Figure 4 Enlarged view of point A in the middle.

[0043] Figure 8 This is a schematic diagram of the clearance groove portion of the present invention.

[0044] The numbers and letters in the diagram represent the names of the corresponding components:

[0045] 1. Main board; 2. Damping part; 3. Connecting plate; 4. First connecting part; 401. First rotating sleeve; 402. Second rotating sleeve; 5. Connecting rod part; 501. Inner pivot; 502. Outer bushing; 503. First clearance part; 6. First shaft; 7. Second shaft; 8. Connecting rod sleeve; 801. Rotation space; 802. Narrowing part; 803. Side; 804. Connecting edge; 9. Middle plate; 10. First mounting groove; 11. Slide plate; 12. Positioning protrusion; 13. Second mounting groove; 14. First locking hole; 15. Third rotating sleeve; 16. Second clearance part; 18. First shaft hole; 19. Sleeve seat; 21. Slide groove; 22. Rotation groove; 23. Limiting wall; 24. Damping rod; 25. Transition surface; 26. Cover plate; 27. Second shaft hole; 28. Clearance groove. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example

[0048] like Figure 1-8As shown, a double-link folding screen hinge includes:

[0049] Mainboard 1, with a middle plate 9 at one end;

[0050] The connecting rod part 5 is rotatably mounted on the middle plate 9 on one side. The connecting rod part 5 is provided in two sets on both sides of the middle plate 9, and the side away from the middle plate 9 has two sets of outer bushings 502 arranged at intervals.

[0051] The first connecting part 4 is rotatably connected to the outside of the connecting rod part 5 on one side, and has two sets of first rotating sleeves 401 arranged at intervals on the other side of the first connecting part 4;

[0052] The connecting plate 3 is pivotally connected to the outside of the first connecting part 4 on one side, and the other side is used to fix the foldable product.

[0053] The connecting rod sleeve 8 has an opening on one side, and the side with the opening is movably covered on the front and rear sides of the first rotating sleeve 401 and the second rotating sleeve 402.

[0054] The middle plate 9 has two sets of rotating grooves 22 symmetrically opened along its length. The inner side of the connecting rod part 5 is provided with an inner pivot 501 that can be rotatably connected to the rotating groove 22. Limiting walls 23 are provided on the front and rear sides of the middle plate 9, and at least one of the limiting walls 23 has a first shaft hole 18 that allows the inner pivot 501 to rotate. The inner pivot 501 is rotatably connected to the middle plate 9 through the rotating groove 22 and the inner pivot 501 is rotatably connected to the first shaft hole 18. When the connecting rod part 5 is flat, it is located between the limiting walls 23 on both sides. When the two sets of limiting walls 23 are flat, they axially limit the connecting rod part 5. The cover plate 26 is placed on the middle plate 9 to laterally limit the connecting rod part 5, the damping rod 24 and the sliding plate 11.

[0055] Three sets of second rotating sleeves 402 are provided on the inner side of the first connecting part 4. The three sets of second rotating sleeves 402 are located on both sides and the middle of the outer bushing 502, respectively. The second rotating sleeves 402 and the outer bushing 502 are coaxially provided with through holes and pivotally connected to the second shaft 7. The second rotating sleeves 402 and the outer bushing 502 on one side of the connecting part are staggered and can cover both sides of the outer bushing. The first rotating sleeve 401 and the third rotating sleeve 15 on the other side of the connecting part are staggered. The third rotating sleeve 15 and the sleeve seat 19 cover both sides of the first rotating sleeve 401. With this arrangement, during the rotation of the pivot, a first rotation node is formed at the middle plate 9 and the connecting rod part 5, a second rotation node is formed at the connecting rod part 5 and the connecting part, and a third rotation node is formed at the connecting part and the connecting plate 3. A connecting rod structure is formed through the connecting part and the connecting rod part 5. At the second rotation node, one side of the connecting rod sleeve 8 is coaxially pivotally connected to the second rotation node, and the other side of the connecting rod sleeve 8... On the side, the connecting sleeve 8, the damping rod 24, and the sliding plate 11 are pivotally connected to form the fourth rotation node. The connecting sleeve 8 can transmit damping to the second rotation node to prevent the shaft from loosening. On the other hand, it forms two sets of connecting rod-type rotational connection structures between the connecting rod and the middle plate 9. One set is from the middle plate 9 to the connecting rod part 5, from the connecting rod part 5 to the connecting part and the connecting sleeve 8, and from the connecting part to the connecting plate 3. The second set is from the middle plate 9 to the damping rod 24 and the sliding plate 11, from the sliding plate 11 to the connecting plate 3, and from the damping rod 24 and the sliding plate 11 to the connecting sleeve 8. Specifically, the second set of connecting rod structures can be divided into two groups of connecting rod structures. One group is from the middle plate 9 to the sliding plate 11 and from the sliding plate 11 to the connecting plate 3. The other group is from the middle plate 9 to the sliding plate 11 and the damping rod 24, and from the sliding plate 11 and the damping rod 24 to the connecting sleeve 8. The connecting sleeve 8 participates in entering the second rotation node of the first connecting rod structure, so that the two sets of rotating connecting rods are coupled to each other and rotate together, greatly increasing the structural strength.

[0056] The connecting rod sleeve 8 is rotatably covered by the second rotating sleeve 402. The connecting rod sleeve 8 includes:

[0057] One connecting edge 804;

[0058] The sides 803 at both ends of the connecting plate 3 are integrally formed;

[0059] The side 803 has a through hole for the second shaft 7 to be rotatably connected to the connecting rod sleeve 8. The opening of the connecting rod sleeve 8 forms a rotation space 801. The outer shaft sleeve 502 and the second rotating sleeve 402 are rotatably connected within this rotation space 801 via the second shaft 7.

[0060] Two sets of third rotating sleeves 15 are arranged at intervals on the inner side of the connecting plate 3. A sleeve seat 19 is arranged at intervals between the connecting plate 3 and the third rotating sleeves 15. The third rotating sleeves 15 have through holes and the sleeve seat 19 has blind holes. One of the first rotating sleeves 401 is located between the two sets of third rotating sleeves 15, and the other is located between the third rotating sleeve 15 and the sleeve seat 19. The first rotating sleeve 401 and the third rotating sleeve 15 are pivotally connected by a first shaft 6 extending to the sleeve seat 19. The first rotating sleeve 401 and the third rotating sleeve 15 are staggered and rotatably connected by the first shaft 6 to form a third rotating node.

[0061] The connecting rod sleeve 8 has a rotation space 801 on one side of the opening. The connecting edge 804 has a gradually narrowing portion 802 that slopes and contracts towards the rotation space 801. The connecting plate 3 has a second clearance portion 16 at the sleeve seat 19. A stepped surface is formed between the bottom of the second clearance portion 16 and the connecting plate 3. By setting the narrowing portion 802, the structural strength between the connecting rod sleeve 8 and the two sets of side edges 803 is ensured, while the first rotating sleeve 401 and the third rotating sleeve 15 can be cleared when rotating, allowing for a more compact structure. The second clearance portion 16 forms a stepped surface, which can abut against the connecting rod sleeve 8 to prevent loosening and misalignment. The second clearance portion 16 itself can clear the flip-over connecting rod rotation of the connecting rod sleeve 8. In the flattened state, one side of the connecting rod sleeve 8 is flush with the connecting plate 3, and the other side does not exceed the height of the cover plate 26. In the 90° folded state, the connecting rod sleeve 8 does not exceed the outer side of the vertical folding surface of the middle plate 9 and the connecting plate 3.

[0062] Damping parts 2 are provided on the front and rear sides of the main board 1, and a sliding groove 21 is provided on the connecting plate 3. The sliding groove 21 is slidably connected to the sliding plate 11, and one end of the sliding plate is connected to the damping part 2.

[0063] The outer side of the connecting plate 3 is provided with a first mounting groove 10 and a second mounting groove 13. The opening diameter of the first mounting groove 10 and the second mounting groove 13 on the outer side is smaller than the maximum diameter of the groove body. The first mounting groove 10 and the second mounting groove 13 are provided with a first locking hole 14. The first mounting groove 10 is fixedly connected with a positioning protrusion 12. The first locking hole 14 is used to connect with electronic product components. It can be connected by bolts, rivets or welding. The opening diameter of the first mounting groove 10 and the second mounting groove 13 is smaller than the maximum diameter of the groove body. When installing electronic product components, it can form a limit to resist radial tension. The positioning protrusion 12 can facilitate installation and positioning.

[0064] A first clearance part 503 is provided on the side of the connecting rod part 5 away from the middle plate 9. The first clearance part 503 is arc-shaped. The middle plate 9 is detachably covered with a cover plate 26. The cover plate 26 has a clearance groove 28 to allow the connecting rod part 5 and the slide plate 11 to rotate. The cover plate 26 is detachably mounted on the main plate 1 by bolts. Both the cover plate 26 and the connecting plate 3 have clearance grooves 28. The clearance groove 28 of the connecting plate 3 is used to allow the connecting rod sleeve 8 to enter.

[0065] The middle plate 9 has a transition surface 25 on the side away from the cover plate 26 along its length, so that when the connecting plate 3 is in the flat state, the middle plate 9 avoids the connecting rod sleeve 8, and when the two sets of connecting plates 3 are rotated 90° to form a folded state, the middle plate 9 abuts against the limiting wall 23.

[0066] In use, the connecting plate 3 is used to fix it to the electronic product. When the two sets of connecting plates 3 are respectively connected between the two rotatable parts of the electronic product, when the two sets of connecting plates 3 rotate from 0° to 90° to the same side, the electronic product rotates from a flat state to a folded state. During the rotation, one side of the connecting rod 5 is rotatably connected to the middle plate 9, and the other side of the connecting rod 5 is rotatably connected to one side of the first connecting part 4. The connecting plate 3 is rotatably connected to the other side of the first connecting part 4. The connecting rod sleeve 8 covers the outside of the first rotating sleeve 401 and the second rotating sleeve 402. When the connecting rod 5 and the first connecting part 4 receive axial force, the connecting rod sleeve 8 covers the outside to prevent misalignment and increase the structural strength of the connecting rod 5 and the first connecting part 4 against axial force. The axial force in the two parts of the electronic product is specifically a torsional force. On the other hand, the connecting sleeve 8, the damping rod 24, and the sliding plate 11 are coaxially or non-coaxially rotatably connected to the connecting plate 3. During the rotation and fixing process, the damping part 2 generates rotational damping on the damping rod 24, and the damping rod 24 forms rotational damping on the sliding plate and the connecting sleeve 8, realizing a high-strength connection of the dual-axis pivot, which can achieve a longer service life and a larger force range. The damping attenuation rate is low. The linear connection is achieved through the linkage structure, which has a longer fatigue resistance compared to the point-like rotational connection. The linkage structure can be coupled and mutually supported, which not only has a continuous and stable torque, but also makes the folding electronic product using this pivot more robust.

[0067] The slide 21 is a flat T-shaped slide 21 that is adapted to the slide plate 11. During the rotation process, the slide plate 11 slides relative to the slide 21, and is limited and guided between the main board 1 and the connecting plate 3. One end of the slide plate 11 is rotatably connected to the main board 1, and the other end is slidably connected to the connecting plate 3. The slide plate 11 can also transmit the damping generated by the damping part 2. The connecting rod sleeve 8 is pivotally connected to the slide plate 11 and the damping rod 24 through the second shaft hole 27 and the rotating rod, further transmitting the damping generated by the damping part 2. Three damping transmission points are evenly formed in opposite directions along the length of the connecting part, making the rotation process more stable.

[0068] The damping part 2 is a combination of existing springs, disc springs or damping friction plates to form rotational damping. The end of its rotating shaft is provided with a gear. The damping rod 24 is rotatably connected to the connecting plate 3 and meshes with the gear, thereby providing damping during rotation.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-link folding screen hinge, characterized in that, include: The main board has a middle plate at one end; a connecting rod portion rotatably mounted on one side of the middle plate, the connecting rod portion having two sets on both sides of the middle plate, the side away from the middle plate having two sets of outer bushings spaced apart; a first connecting portion, one side of which is rotatably connected to the outside of the connecting rod portion, the other side of which has two sets of first rotating sleeves spaced apart; a connecting plate, one side of which is pivotally connected to the outside of the first connecting portion, the other side being used to fix a foldable product; and a connecting rod sleeve, one side of which has an opening, and the side with the opening movably covers the front and rear sides of the first and second rotating sleeves. The inner side of the first connecting part is provided with three sets of second rotating sleeves. The three sets of second rotating sleeves are located on both sides and the middle of the outer bushing, respectively. The second rotating sleeve and the outer bushing are coaxially provided with through holes and pivotally connected with the second shaft. Two sets of third rotating sleeves are arranged at intervals on the inner side of the first connecting part. A sleeve seat is arranged at the interval of the third rotating sleeves on the first connecting part. The third rotating sleeve has a through hole and the sleeve seat has a blind hole. One of the first rotating sleeves is located between the two sets of third rotating sleeves and the other is located between the third rotating sleeve and the sleeve seat. The first rotating sleeve and the third rotating sleeve are pivotally connected by a first shaft extending to the sleeve seat.

2. The double-link folding screen hinge according to claim 1, characterized in that, The middle plate is symmetrically provided with two sets of rotating grooves along its length. The inner side of the connecting rod is provided with an inner pivot that can be rotatably connected to the rotating groove. Limiting walls are provided on the front and rear sides of the middle plate, and at least one of the limiting walls is provided with a first shaft hole for the inner pivot to rotate.

3. The double-link folding screen hinge according to claim 1, characterized in that, The connecting rod sleeve is rotatably covered by the second rotating sleeve. The connecting rod sleeve includes: a connecting edge; side edges integrally formed at both ends of the connecting plate; and through holes provided on the side edges for the second shaft to be rotatably connected to the connecting rod sleeve.

4. A double-link folding screen hinge according to claim 3, characterized in that, The connecting rod is sleeved on one side of the opening to form a rotation space. The connecting edge has a gradually narrowing portion that slopes and contracts towards the rotation space. The connecting plate has a second clearance portion at the sleeve seat. A stepped surface is formed between the bottom of the second clearance portion and the connecting plate.

5. A double-link folding screen hinge according to claim 1, characterized in that, The motherboard has damping sections on its front and rear sides, and the connecting plate has a sliding groove. A sliding plate is slidably connected to the sliding groove, and one end of the sliding plate is connected to the damping section.

6. A double-link folding screen hinge according to claim 1, characterized in that, The outer side of the connecting plate is provided with a first mounting groove and a second mounting groove, respectively. The opening diameter of the first mounting groove and the second mounting groove on the outer side is smaller than the maximum diameter of the groove body. The first mounting groove and the second mounting groove are both provided with a first locking hole. The first mounting groove is fixedly connected with a positioning protrusion.

7. A double-link folding screen hinge according to claim 1, characterized in that, A first clearance portion is provided on the side of the connecting rod portion away from the middle plate. The first clearance portion is arc-shaped. The middle plate is detachably covered with a cover plate. The cover plate has clearance grooves to allow the connecting rod portion and the slide plate to rotate.

8. A double-link folding screen hinge according to claim 1, characterized in that, The middle plate has a transition surface along its length on the side away from the cover plate, so that when the connecting plate is flat, the middle plate avoids the connecting rod sleeve, and when the two sets of connecting plates are rotated 90° to form a folded state, the middle plate abuts against the limiting wall.

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