Double-screen folding hinge

Abstract

The utility model relates to a double-screen folding hinge which is provided with a first machine body and a second machine body, a first side plate of the first machine body is provided with a first inclined rail and a first transverse rail, and a second side plate of the second machine body is provided with a second inclined rail and a second transverse rail; a first guide rod and a second guide rod of a supporting seat are respectively connected with the first inclined rail and the second inclined rail; a first gear connecting rod is connected with the first side plate, a first tooth part of the first gear connecting rod is pivoted with one end of the supporting seat through a first shaft rod, and a first guide column of the first shaft rod is connected with the first transverse rail; a second gear connecting rod is connected with the second side plate, a second tooth part of the second gear connecting rod is connected with the first tooth part, the second tooth part is pivoted with the other end of the supporting seat through a second shaft rod, and a second guide column of the second shaft rod is connected with the second transverse rail, so that the distance between the two machine bodies can be shortened when the two machine bodies are unfolded.

Description

Technical Field

[0001] This utility model relates to a hinge, and more particularly to a dual-screen folding hinge for a folding electronic device. Background Technology

[0002] In traditional foldable electronic devices, such as dual-screen displays, the supporting sides of each display unit are connected by a hinged mechanism, either a split hinge or a multi-axis hinge, to form a pivot, allowing the display units to be flipped up or closed relative to each other. To prevent the display units from interfering with or colliding with each other during folding, a large amount of rotation space is usually provided in the design. However, such a design often results in an excessively large distance between the two display units when unfolded, increasing the overall size and making them inconvenient to use.

[0003] Therefore, as shown in the "Dual-Axis Synchronous Hinge" patent application in Taiwan Patent Publication No. TW I747708, a solution is provided, which mainly includes a base unit and two pivot units. The base unit includes a base with a first surface, two recessed rotation grooves formed on the first surface, and two through-hole pivot grooves. The rotation groove includes a straight section extending vertically and an arc-shaped section connecting the straight section and extending outward and downward in an arc shape. These pivot units are rotatably mounted on the base of the base unit. Each pivot unit includes a pivot rotatably mounted on the pivot groove of the base, a rotating member fixedly sleeved on the pivot, and a pivot plate fixedly sleeved on the pivot. The rotating member forms a slider movably accommodated in the corresponding rotation groove, so that the distance between the two bodies can be correspondingly shortened when the two bodies are unfolded. However, its overall structure is complex and not easy to manufacture. Utility Model Content

[0004] In view of this, in order to provide a structure that is different from the existing technology and to improve the above-mentioned shortcomings, the inventor has accumulated many years of experience and continuous research and development, resulting in this utility model.

[0005] One objective of this invention is to provide a dual-screen folding hinge that can solve the problems of excessive spacing between the two display units of existing folding electronic devices when unfolded, and the complex structure of the "dual-axis synchronous hinge" patent, which is not easy to process and manufacture.

[0006] To achieve the aforementioned objectives, the dual-axis synchronous motion module of this utility model mainly includes a first body, a second body, a support base, a first gear connecting rod, and a second gear connecting rod. The first body has a first side plate, one end of which has a first inclined rail and a first horizontal rail. The second body has a second side plate, one end of which has a second inclined rail and a second horizontal rail. The support base has a first guide rod and a second guide rod on one side surface. The first guide rod is slidably connected to the first inclined rail, and the second guide rod is slidably connected to the second inclined rail. One end of the first gear connecting rod is connected to the first side plate in a relatively movable manner, and the other end of the first gear connecting rod has a first tooth. The first tooth passes through a first... The first shaft is pivotally connected to one end of the support base. One end of the first shaft has a first guide post, which is connected to the first horizontal rail in a relatively sliding manner. One end of the second gear connecting rod is connected to the second side plate in a relatively movable manner. The other end of the second gear connecting rod has a second tooth, which is connected to the first tooth in a reverse rotation manner, allowing the first body and the second body to rotate and open and close relative to each other. The second tooth is pivotally connected to the other end of the support base via a second shaft. One end of the second shaft has a second guide post, which is connected to the second horizontal rail in a relatively sliding manner.

[0007] In practice, the first tooth has a first shaft hole, and the second tooth has a second shaft hole; the support base has a support plate, one end of the support plate has a first pivot hole, and the first shaft passes coaxially through the first shaft hole and the first pivot hole, so that the first tooth can pivotally connect to one end of the support plate; the other end of the support plate has a second pivot hole, and the second shaft passes coaxially through the second shaft hole and the second pivot hole, so that the second tooth can pivotally connect to the other end of the support plate.

[0008] During implementation, one end of the support plate has a first guide rod, and the other end of the support plate has a second guide rod. The first guide rod and the second guide rod are located on the same side of the support plate.

[0009] In practice, this utility model also includes a relay gear set, which respectively meshes with the first tooth and the second tooth, and a limiting part is provided on the other side of the support plate to accommodate and position the relay gear set.

[0010] In practice, this utility model also includes a cover plate, on the surface of which is a first limiting hole and a second limiting hole, and on the surface of the support plate is a first positioning hole and a second positioning hole, for positioning the two ends of the relay gear set respectively; the limiting part includes two parallel lugs, and there is a limiting space between the two lugs for accommodating the relay gear set, and one end of the two lugs is connected to the cover plate respectively.

[0011] In practice, the other end of the first side plate has at least one first fixing member, and one end of the first gear connecting rod has at least one first guide groove. The at least one first fixing member passes through the at least one first guide groove, so that one end of the first gear connecting rod can be connected to the first side plate in a relatively movable manner.

[0012] In practice, the other end of the second side plate has at least one second fixing member, and one end of the second gear connecting rod has at least one second guide groove. The at least one second fixing member passes through the at least one second guide groove, so that one end of the second gear connecting rod can be connected to the second side plate in a relatively movable manner.

[0013] In implementation, the first side plate is an elongated vertical plate. The first side plate has a first side edge and a second side edge that are parallel to each other in the long direction, and a first top edge and a first bottom edge that are parallel to each other in the short direction. The first side plate has a first inclined rail and a first horizontal rail on its surface. The first inclined rail and the first horizontal rail are adjacent to the first side edge of one end of the first side plate. The first inclined rail extends downward obliquely from the first top edge toward the second side edge. The first horizontal rail is parallel to the first top edge and extends laterally from the first side edge toward the second side edge.

[0014] In practice, the first inclined rail is an inclined groove with an upper end and a lower end. The upper end is connected to the first top edge. The first horizontal rail is a horizontal groove with a first end and a second end. The first end is adjacent to the first side edge, and the second end is adjacent to the lower end of the first inclined rail.

[0015] In practice, one end of the first side plate has a first inclined groove, one end of the first inclined groove is connected to the lower end of the first inclined rail, the other end of the first inclined groove is connected to the first bottom edge of the first side plate, and the other end of the first inclined groove is adjacent to the first side edge.

[0016] In implementation, the second side panel is an elongated vertical panel with a left side and a right side parallel to each other along its length, and the first side panel has a second top side and a second bottom side parallel to each other along its short length. The surface of the second side panel has a second inclined rail and a second horizontal rail. The second inclined rail and the second horizontal rail are adjacent to the left side of one end of the second side panel. The second inclined rail extends downwards obliquely from the second top side toward the right side. The second horizontal rail is parallel to the second top side and extends laterally from the left side toward the right side.

[0017] In practice, the second inclined rail is an inclined groove with a top end and a bottom end. The top end is connected to the second top edge. The second horizontal rail is a horizontal groove with a first end and a second end. The first end is adjacent to the left side, and the second end is adjacent to the bottom end of the second inclined rail.

[0018] In practice, one end of the second side plate has a second inclined groove, one end of which is connected to the bottom end of the second inclined rail, and the other end of which is connected to the second bottom edge of the second side plate, and the other end of which is adjacent to the left side.

[0019] The beneficial effects of this utility model are as follows: by connecting one end of two gear connecting rods to two side plates in a relatively movable manner, and the other end to a support base via a shaft, the two guide rods of the support base are connected to the inclined rails on the two side plates in a relatively sliding manner, and the guide posts on the two shafts are connected to the horizontal rails on the two side plates in a relatively sliding manner, the components can be redesigned and assembled for easy manufacturing. At the same time, when the two bodies, each with a display, are flattened, the two bodies can be kept at a small distance for easy use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the first and second bodies of the preferred embodiment of the present invention when fully unfolded.

[0021] Figure 2 This is an exploded view of the components of a preferred embodiment of the present invention;

[0022] Figure 3 The first and second bodies of the present invention are fully unfolded in a top view, which is a preferred embodiment of the present invention.

[0023] Figure 4 for Figure 3 A-A' cross-sectional view;

[0024] Figure 5 for Figure 3 B-B' cross-sectional view;

[0025] Figure 6 for Figure 3 A schematic diagram of the first and second mecha bodies in folded A-A' section;

[0026] Figure 7 for Figure 3 A schematic diagram of the B-B' cross-section of the first and second mechs when folded;

[0027] Figure 8 for Figure 3 A schematic diagram of the A-A' section of the first and second bodies when they are relatively closed;

[0028] Figure 9 for Figure 3 A schematic diagram of the B-B' cross-section of the first and second bodies when they are relatively closed;

[0029] Figure 10This is a three-dimensional view of the first and second bodies of the present invention when they are relatively closed, representing a preferred embodiment of the present invention.

[0030] Figure 11 for Figure 3 A cross-sectional view of the first and second bodies when they are rotated 360 degrees relative to each other;

[0031] Figure 12 for Figure 3 A schematic diagram of the B-B' section of the first and second bodies when they are rotated 360 degrees relative to each other;

[0032] Figure 13 This is a three-dimensional view of the first and second bodies of the present invention when they are rotated 360 degrees relative to each other, representing a preferred embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1: Dual-screen folding hinge

[0035] 2: First Machine

[0036] 21: First side plate

[0037] 211: First side

[0038] 212: Second side

[0039] 213: First top edge

[0040] 214: First base

[0041] 22: First inclined rail

[0042] 221: Upper end

[0043] 222: Lower end

[0044] 23: First inclined groove

[0045] 24: First horizontal rail

[0046] 241: First end

[0047] 242: Second End

[0048] 25: First arc convex part

[0049] 26: First fastener

[0050] 3: Second Unit

[0051] 31: Second side panel

[0052] 311: Left side

[0053] 312: Right side

[0054] 313: Second top edge

[0055] 314: Second base

[0056] 32: Second inclined rail

[0057] 321: Top part

[0058] 322: Bottom end

[0059] 33: Second inclined groove

[0060] 34: Second horizontal rail

[0061] 341: First end

[0062] 342: Second end

[0063] 35: Second arc protrusion

[0064] 36: Second fastener

[0065] 4: Support base

[0066] 41: Support plate

[0067] 42: First pivot hole

[0068] 421: Second pivot hole

[0069] 43: First positioning hole

[0070] 431: Second positioning hole

[0071] 44: First guide rod

[0072] 441: Second guide rod

[0073] 45,45': Protruding ear

[0074] 46: Limiting Space

[0075] 47: Limiting part

[0076] 48: Cover plate

[0077] 481: First limiting hole

[0078] 482: Second limiting hole

[0079] 49: Relay Gear Set

[0080] 5: First gear connecting rod

[0081] 51: First gear plate

[0082] 52: First guide groove

[0083] 53: First tooth

[0084] 54: First shaft hole

[0085] 55: First shaft

[0086] 56: First limit plate

[0087] 57: First guide post

[0088] 58: First annular groove

[0089] 59: Clip-on plate

[0090] 6: Second gear connecting rod

[0091] 61: Second gear plate

[0092] 62: Second guide groove

[0093] 63: Second tooth

[0094] 64: Second shaft hole

[0095] 65: Second shaft

[0096] 66: Second limit plate

[0097] 67: Second guide post

[0098] 68: Second annular groove. Detailed Implementation

[0099] Please see Figures 1-5 As shown, this is a preferred embodiment of the dual-screen folding hinge 1 of this utility model, mainly including a first body 2, a second body 3, a support base 4, a first gear link 5, and a second gear link 6. The first body 2 is a keyboard base, and the second body 3 has a display. In practice, the first body 2 and the second body 3 may each have different displays.

[0100] The first body 2 has a first side plate 21 on one side. In practice, the first side plate 21 can also be a long vertical plate that is locked to one side surface of the first body 2 and extends laterally. The long end of the first side plate 21 has a first side edge 211 and a second side edge 212 that are parallel to each other, and the short end of the first side plate 21 has a first top edge 213 and a first bottom edge 214 that are parallel to each other.

[0101] The surface of one end of the first side plate 21 has a first inclined rail 22, a first inclined groove 23, and a first horizontal rail 24 adjacent to the first side edge 211. The first inclined rail 22 and the first inclined groove 23 are both straight grooves. The first inclined rail 22 has an upper end 221 and a lower end 222. The upper end 221 is connected upward to the first top edge 213, and the lower end 222 extends downward obliquely from the first top edge 213 toward the second side edge 212. One end of the first inclined groove 23 is connected upward to the lower end 222 of the first inclined rail 22, and the other end of the first inclined groove 23 is connected downward to the first bottom edge 214 of the first side plate 21. The other end of the first inclined groove 23 is adjacent to the first side edge 211, so that the first inclined rail 22 and the first inclined groove 23 are opened in opposite directions on the upper and lower sides of the first side plate 21 and extend in different oblique directions.

[0102] The first horizontal rail 24 is a transverse groove, parallel to the first top edge 213 and the first bottom edge 214, and located between the first inclined rail 22 and the first inclined groove 23. The first horizontal rail 24 extends laterally from the first side edge 211 toward the second side edge 212. The first horizontal rail 24 has a first end 241 and a second end 242. The first end 241 is adjacent to the first side edge 211, and a first arcuate protrusion 25 is provided between the first end 241 and the first side edge 211. The second end 242 is adjacent to the lower end 222 of the first inclined rail 22. Two headed studs are provided on the plate surface of the other end of the first side plate 21. The two headed studs are spaced apart along the length of the first side plate 21, and the two headed studs are respectively locked and fixed to the plate surface of the first side plate 21. In practice, the headed studs serve as the first fixing members 26.

[0103] The second body 3 has a second side plate 31 on one side. The second side plate 31 can also be locked to one side surface of the second body 3, and the second side plate 31 is a horizontally extending elongated vertical plate. The two ends of the second side plate 31 in the long direction have a left side 311 and a right side 312 that are parallel to each other, and the two ends of the second side plate 31 in the short direction have a second top side 313 and a second bottom side 314 that are parallel to each other. The second side plate 31 has a second inclined rail 32, a second inclined groove 33 and a second horizontal rail 34 on one end of the plate surface adjacent to the left side 311. The second inclined rail 32 and the second inclined groove 33 are straight grooves. The second inclined rail 32 has a top end 321 and a bottom end 322. The top end 321 is connected upward to the second top edge 313, and the bottom end 322 extends downward obliquely from the second top edge 313 toward the right side 312. One end of the second inclined groove 33 is connected upward to the bottom end 322 of the second inclined rail 32, and the other end of the second inclined groove 33 is connected downward to the second bottom edge 314 of the second side plate 31. The other end of the second inclined groove 33 is adjacent to the left side 311, so that the second inclined rail 32 and the second inclined groove 33 form a bending angle and are opened in opposite directions on the upper and lower sides of the second side plate 31.

[0104] The second horizontal rail 34 is a transverse groove, parallel to the second top edge 313 and the second bottom edge 314, and located between the second inclined rail 32 and the second inclined groove 33. The second horizontal rail 34 extends laterally from the left side 311 to the right side 312, and has a first end 341 and a second end 342. The first end 341 is adjacent to the left side 311, and a second arcuate protrusion 35 is provided between the first end 341 and the left side 311. The second end 342 is adjacent to the bottom end 322 of the second inclined rail 32. Two headed studs are provided on the plate surface at the other end of the second side plate 31. The two headed studs are spaced apart along the length of the second side plate 31, and are respectively locked and fixed to the plate surface of the second side plate 31. In practice, the headed studs serve as the second fixing members 36.

[0105] The support base 4 has a horizontally extending vertical plate, which serves as a support plate 41. One end of the support plate 41 has a first pivot hole 42, and the other end has a second pivot hole 421. A first positioning hole 43 and a second positioning hole 431 are provided on the plate surface between the first pivot hole 42 and the second pivot hole 421. In addition, one end of the support plate 41 has a first guide rod 44, which is confined within the first inclined rail 22 and the first inclined groove 23, so that the first guide rod 44 is connected to the first inclined rail 22 and the first inclined groove 23 in a relatively sliding manner. The other end of the support plate 41 has a second guide rod 441, which is confined within the second inclined rail 32 and the second inclined groove 33, so that the second guide rod 441 is connected to the second inclined rail 32 and the second inclined groove 33 in a relatively sliding manner.

[0106] The first guide rod 44 and the second guide rod 441 are disposed on the same side of the support plate 41. The other side of the support plate 41 has two parallel lugs 45 and 45', with a limiting space 46 between them. In implementation, the two lugs 45 and 45' are combined into a limiting part 47. Furthermore, one end of each lug 45 and 45' is connected to a cover plate 48. The cover plate 48 has a first limiting hole 481 and a second limiting hole 482. Thus, when one end of each of the two meshing gears is positioned in the first positioning hole 43 and the second positioning hole 431 of the support plate 41, and the other ends of the two gears are positioned in the first limiting hole 481 and the second limiting hole 482 of the cover plate 48, the two gears can be accommodated and positioned within the limiting space 46. In implementation, the two gears are combined into a relay gear set 49. The first gear connecting rod 5 is formed by stacking multiple elongated first gear plates 51. One end of the first gear connecting rod 5 has two elongated slots, which serve as first guide slots 52. The two first guide slots 52 are spaced apart along the length of the first gear connecting rod 5. Two first fixing members 26 pass through the two first guide slots 52 respectively, so that one end of the first gear connecting rod 5 is connected to the first side plate 21 in a relatively movable manner. The other end of the first gear connecting rod 5 has a first tooth 53, which has a first shaft hole 54 and engages with one of the gears of the relay gear set 49. One end of the first shaft 55 has a radially protruding first limiting plate 56, and a first guide post 57 is provided on the surface of the first limiting plate 56. The first guide post 57 is limited within the first horizontal rail 24 so that the first guide post 57 is connected to the first horizontal rail 24 in a relatively sliding manner. The other end of the first shaft 55 has a first annular groove 58. When the other end of the first shaft 55 coaxially passes through the first pivot hole 42 and the first shaft hole 54, and is engaged with the first annular groove 58 by a snap-fit ​​plate 59, the first tooth 53 and the support seat 4 can be fixed, and the first tooth 53 is pivotally connected to one end of the support plate 41.

[0107] The second gear connecting rod 6 is arranged in opposite directions at both ends of the support plate 41. In implementation, the second gear connecting rod 6 is formed by stacking multiple elongated second gear plates 61. One end of the second gear connecting rod 6 has two elongated grooves, which serve as second guide grooves 62. The two second guide grooves 62 are spaced apart along the length of the second gear connecting rod 6. Two second fixing members 36 pass through the two second guide grooves 62 respectively, so that one end of the second gear connecting rod 6 is connected to the second side plate 31 in a relatively movable manner. The other end of the second gear connecting rod 6 has a second tooth 63, which has a second shaft hole 64 and engages with another gear of the relay gear set 49. One end of a second shaft 65 has a radially protruding second limiting plate 66. The surface of the second limiting plate 66 has a second guide post 67, which is confined within the second horizontal rail 34 so that the second guide post 67 is connected to the second horizontal rail 34 in a relatively sliding manner. The other end of the second shaft 65 has a second annular groove 68. When the other end of the second shaft 65 passes coaxially through the second pivot hole 421 and the second shaft hole 64, and is engaged with the second annular groove 68 by the snap-fit ​​plate 59, the second tooth 63 and the support seat 4 can be fixed, and the second tooth 63 can be pivotally connected to the other end of the support plate 41.

[0108] Thus, during the process of the first body 2 and the second body 3 unfolding or flipping to close, the first gear connecting rod 5 rotates in the opposite direction relative to the second gear connecting rod 6 through the linkage of the first tooth 53, the second tooth 63 and the two gears of the relay gear set 49, and simultaneously drives the support seat 4, so that the first guide rod 44 and the second guide rod 441 slide in the first inclined rail 22, the second inclined rail 32 and the first inclined groove 23 and the second inclined groove 33 respectively, and at the same time, the first guide post 57 and the second guide post 67 move in the first horizontal rail 24 and the second horizontal rail 34 respectively. Torque is generated by the synchronous rotational friction between the first shaft hole 54 of the first gear connecting rod 5 and the second shaft hole 64 of the second gear connecting rod 6 and the first shaft 55 and the second shaft 65, respectively. By adjusting the number of multiple first gear plates 51 and multiple second gear plates 61, the torque can be adjusted so that it can be stably maintained within a preset range at each rotation angle. This allows the first body 2 and the second body 3 to rotate stably relative to each other and to stop freely at a certain opening angle during relative rotation.

[0109] Among them, such as Figure 1 , Figure 5 As shown, when the first guide post 57 and the second guide post 67 move to the bottom in a relatively far apart direction, the first guide rod 44 reaches the lower end 222 of the first inclined rail 22, and the second guide rod 441 reaches the bottom end 322 of the second inclined rail 32, the first body 2 and the second body 3 can be unfolded relative to each other to form a completely flat state. And as... Figures 6-10As shown, when the first guide post 57 and the second guide post 67 move within the first horizontal rail 24 and the second horizontal rail 34 respectively, and the first guide rod 44 and the second guide rod 441 slide within the first inclined groove 23 and the second inclined groove 33 respectively, and the two first fixing members 26 and the two second fixing members 36 move within the two first guide grooves 52 and the two second guide grooves 62 respectively, the first body 2 and the second body 3 can be rotated 180 degrees relative to each other, so that the two displays are in a relatively closed state.

[0110] For example Figures 11-13 As shown, when the first guide post 57 and the second guide post 67 move within the first horizontal rail 24 and the second horizontal rail 34 respectively, and the first guide rod 44 and the second guide rod 441 slide within the first inclined rail 22 and the second inclined rail 32 respectively, and the two first fixing members 26 and the two second fixing members 36 move within the two first guide grooves 52 and the two second guide grooves 62 respectively, the first body 2 and the second body 3 can be rotated 360 degrees relative to each other so as to use different displays.

[0111] In summary, the dual-screen folding hinge of this utility model mainly connects two side plates by means of two gear rods, one end of which moves relative to the other. The other ends of the two gear rods are respectively connected to a relay gear set for reverse rotation. The other ends of the two gear rods are respectively pivotally connected to a support base via shafts. The two guide rods of the support base are respectively connected to the inclined rails on the two side plates by means of relative sliding, and the guide posts on the two shafts are respectively connected to the horizontal rails on the two side plates by means of relative sliding. This allows the two bodies to flip synchronously and fold closed relative to each other. Not only is the overall structure simple and easy to manufacture and assemble, but when the two bodies, each with a display, are unfolded, the distance between the two bodies can be effectively reduced for ease of use, while also making the overall appearance aesthetically pleasing.

[0112] While this utility model discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of this utility model. Anyone skilled in the art should know that any easily conceived variations or modifications are possible under the technical spirit of this utility model, and are all covered by the patent application scope of this utility model.

Claims

1. A dual-screen folding hinge, characterized in that, include: A first body having a first side plate, one end of which has a first inclined rail and a first transverse rail; A second body having a second side plate, one end of which has a second inclined rail and a second transverse rail; A support base has a first guide rod and a second guide rod on one side surface. The first guide rod is connected to the first inclined rail in a relatively sliding manner, and the second guide rod is connected to the second inclined rail in a relatively sliding manner. A first gear connecting rod, one end of which is connected to the first side plate in a relatively movable manner, and the other end of the first gear connecting rod having a first tooth portion, the first tooth portion being pivotally connected to one end of the support base via a first shaft, and one end of the first shaft having a first guide post, the first guide post being connected to the first cross rail in a relatively slidable manner; and A second gear connecting rod has one end connected to the second side plate in a relatively movable manner, and the other end of the second gear connecting rod has a second tooth that is connected to the first tooth in a reverse rotational manner, allowing the first body and the second body to rotate and open relative to each other; the second tooth is pivotally connected to the other end of the support base via a second shaft, and one end of the second shaft has a second guide post that is connected to the second cross rail in a relatively sliding manner.

2. The dual-screen folding hinge as described in claim 1, characterized in that, The first tooth has a first shaft hole, and the second tooth has a second shaft hole; the support base has a support plate, one end of the support plate has a first pivot hole, the first shaft passes coaxially through the first shaft hole and the first pivot hole, so that the first tooth can pivotally connect to one end of the support plate, and the other end of the support plate has a second pivot hole, the second shaft passes coaxially through the second shaft hole and the second pivot hole, so that the second tooth can pivotally connect to the other end of the support plate.

3. The dual-screen folding hinge as described in claim 2, characterized in that, The support plate has a first guide rod at one end and a second guide rod at the other end, with the first guide rod and the second guide rod located on the same side of the support plate.

4. The dual-screen folding hinge as described in claim 3, characterized in that, It also includes a relay gear set, which meshes with the first tooth and the second tooth respectively, and the other side of the support plate has a limiting part for accommodating and positioning the relay gear set.

5. The dual-screen folding hinge as described in claim 4, characterized in that, It also includes a cover plate with a first limiting hole and a second limiting hole on its surface, and a support plate with a first positioning hole and a second positioning hole on its surface for positioning the two ends of the relay gear set respectively; the limiting part includes two parallel lugs with a limiting space between the two lugs for accommodating the relay gear set, and one end of the two lugs is connected to the cover plate respectively.

6. The dual-screen folding hinge as described in claim 1, characterized in that, The other end of the first side plate has at least one first fixing member, and one end of the first gear connecting rod has at least one first guide groove. The at least one first fixing member passes through the at least one first guide groove, so that one end of the first gear connecting rod can be connected to the first side plate in a relatively movable manner.

7. The dual-screen folding hinge as described in claim 1, characterized in that, The other end of the second side plate has at least one second fixing member, and one end of the second gear connecting rod has at least one second guide groove. The at least one second fixing member passes through the at least one second guide groove, so that one end of the second gear connecting rod can be connected to the second side plate in a relatively movable manner.

8. The dual-screen folding hinge as described in claim 1, characterized in that, The first side panel is an elongated vertical panel. The first side panel has a first side edge and a second side edge that are parallel to each other in the long direction, and a first top edge and a first bottom edge that are parallel to each other in the short direction. The first side panel has a first inclined rail and a first horizontal rail on its surface. The first inclined rail and the first horizontal rail are adjacent to the first side edge at one end of the first side panel. The first inclined rail extends obliquely downward from the first top edge toward the second side edge. The first horizontal rail is parallel to the first top edge and extends laterally from the first side edge toward the second side edge.

9. The dual-screen folding hinge as described in claim 8, characterized in that, The first inclined rail is an inclined groove with an upper end and a lower end. The upper end is connected to the first top edge. The first horizontal rail is a horizontal groove with a first end and a second end. The first end is adjacent to the first side edge, and the second end is adjacent to the lower end of the first inclined rail.

10. The dual-screen folding hinge as described in claim 9, characterized in that, One end of the first side plate has a first inclined groove, one end of which is connected to the lower end of the first inclined rail, and the other end of which is connected to the first bottom edge of the first side plate, and the other end of which is adjacent to the first side edge.

11. The dual-screen folding hinge as described in claim 1, characterized in that, The second side panel is an elongated vertical panel. The second side panel has a left side and a right side that are parallel to each other in the long direction. The first side panel has a second top side and a second bottom side that are parallel to each other in the short direction. The second side panel has a second inclined rail and a second horizontal rail on its surface. The second inclined rail and the second horizontal rail are adjacent to the left side of one end of the second side panel. The second inclined rail extends obliquely downward from the second top side toward the right side. The second horizontal rail is parallel to the second top side and extends laterally from the left side toward the right side.

12. The dual-screen folding hinge as described in claim 11, characterized in that, The second inclined rail is an inclined groove with a top end and a bottom end. The top end is connected to the second top edge. The second horizontal rail is a horizontal groove with a first end and a second end. The first end is adjacent to the left side, and the second end is adjacent to the bottom end of the second inclined rail.

13. The dual-screen folding hinge as described in claim 12, characterized in that, One end of the second side plate has a second inclined groove, one end of which is connected to the bottom end of the second inclined rail, and the other end of which is connected to the second bottom edge of the second side plate, and the other end of which is adjacent to the left side.

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