Folding hinge

Abstract

The utility model discloses a folding hinge which comprises two side floating plates and two rotating shaft damping modules, and the side floating plates are installed on rotating parts on the two sides of the two rotating shaft damping modules respectively. The rotating shaft damping module comprises a synchronous part, a first shaft sleeve, a second shaft sleeve, a first rotating part, a second rotating part, two pin shafts, a buckle, a bayonet plate, a damping assembly, a first connecting plate and a second connecting plate, and the two pin shafts are fixedly inserted into limiting hole columns on the two sides of the synchronous part respectively; one side of the first shaft sleeve and one side of the second shaft sleeve are rotatably arranged on the upper portion of the pin shaft in a sleeving mode and located between the two limiting hole columns arranged on the same side of the first shaft sleeve and the second shaft sleeve, and sleeve holes formed in one side of the first rotating piece and one side of the second rotating piece are rotatably arranged on the lower portion of the pin shaft in a sleeving mode. The two spiral sliding blocks of the synchronous part are in sliding connection with the spiral sliding grooves of the first rotating part and the second rotating part correspondingly. According to the utility model, the occupied space is small, the thickness is thinner, the structure is stable, the rotation clearance is smaller, and the use smoothness and comfort of the whole machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible folding screens, and more specifically, to a folding hinge. Background Art

[0002] The folding screen mobile phone is designed to meet the needs of users when they need a larger display area. It can unfold the screen to achieve the control mode of a larger tablet computer with a screen display. Users can also fold the screen when necessary to fit the use of a traditional straight screen mobile phone. This design concept provides users with multiple usage options in different application scenarios. The folding methods of folding screen mobile phones are mainly divided into two categories: up and down folding and left and right folding. The left and right folding can be further divided into two types: inward folding and outward folding according to the folding direction. In the structural design of folding screen mobile phones, the hinge part plays a key role in realizing the flexible flipping of the screen. However, in the traditional folding screen hinge structure, there is easily a virtual position. The virtual position is the slack or play caused by the relative movement between connecting components. This phenomenon will reduce the stability and response speed of the device, resulting in problems such as poor feel and insensitive response, affecting the overall use experience and shortening the service life of the folding screen. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned defects in the prior art, and to provide a folding hinge that occupies a small space, has a thinner thickness, and has a stable structure, a smaller rotational virtual position, and improves the use feel of the folding screen mobile phone.

[0004] To achieve the above object, the present utility model provides a folding hinge, which includes two side floating plates and two rotating shaft damping modules. The side floating plates are respectively installed on the rotating parts on both sides of the two rotating shaft damping modules. The rotating shaft damping module includes a synchronizing member, a first shaft sleeve, a second shaft sleeve, a first rotating member, a second rotating member, a pin shaft, a buckle, a bayonet plate, a damping component, a first connecting plate and a second connecting plate. On both outer sides of one end of the synchronizing member, two limiting hole columns are respectively provided at intervals and opened along the axial direction. Two pin shafts are respectively inserted into the limiting hole columns on both sides of the synchronizing member. The bayonet plate and the buckle are respectively and correspondingly fixedly arranged in parallel at the upper and lower ends of the two pin shafts. One side of the first shaft sleeve and the second shaft sleeve is respectively rotatably sleeved on the upper part of the corresponding pin shaft and located between the two limiting hole columns arranged on the same side thereof. The other sides of the first shaft sleeve and the second shaft sleeve are respectively slidably connected with one end of the first connecting plate and the second connecting plate in the horizontal direction through positioning members. On both outer sides of the other end of the synchronizing member, spiral sliders are respectively provided. Sleeve holes provided on one side of the first rotating member and the second rotating member are respectively rotatably sleeved on the lower part of the corresponding pin shaft and make the top ends thereof abut against the blocks fixed in the middle of the pin shafts. Spiral chutes corresponding to the shapes of the spiral sliders are opened on the outer side walls of the sleeve holes. The two spiral sliders of the synchronizing member are respectively slidably connected with the spiral chutes of the first rotating member and the second rotating member. The first connecting plate and the second connecting plate are respectively slidably connected with the corresponding first rotating member and second rotating member. The two side floating plates are respectively installed on the corresponding first connecting plate and second connecting plate and are respectively slidably connected with the first rotating member and the second rotating member. Both sides of the damping component are respectively sleeved on the two pin shafts and located between the bottom ends of the first rotating member and the second rotating member and the buckle. When the two side floating plates are folded inward or opened outward to the horizontal state relative to the rotating shaft damping module, the first shaft sleeve and the second shaft sleeve can drive the synchronizing member to slide back and forth along the axial direction of the spiral chutes of the first rotating member and the second rotating member, and the first rotating member and the second rotating member can squeeze or release the damping component through a transmission structure to generate damping.

[0005] Preferably, the damping component includes a cam plate, a spring and a baffle. The two ends of the cam plate and the baffle are respectively movably sleeved on the two pin shafts. The bottom end surfaces of the first rotating member and the second rotating member are set as first concave-convex surfaces. The side of the cam plate close to the first concave-convex surface is set as a second concave-convex surface matching its shape. The first concave-convex surface and the second concave-convex surface are arranged in a concave-convex matching manner. A spring limiting column is formed and protruded on the other side of the cam plate. A limiting convex column is protruded on the side of the baffle close to the cam plate. Three springs are respectively sleeved on the two pin shafts and also located between the cam plate and the baffle between the spring limiting column and the limiting convex column.

[0006] Preferably, the other sides of the first rotating member and the second rotating member are respectively extended with first sliding rails. The top surfaces of one ends of the first connecting plate and the second connecting plate are recessed with first sliding grooves. The first sliding rails of the first rotating member and the second rotating member are respectively slidably connected with the first sliding grooves of the corresponding first connecting plate and the second connecting plate. Second sliding rails are respectively arranged at intervals on the bottom surfaces of the two side floating plates. The second sliding rails of the side floating plates are respectively slidably connected with second sliding grooves formed in the middle of the first sliding rails of the corresponding first rotating member and the second rotating member.

[0007] Preferably, the positioning member is set as a positioning pin. Pin holes are respectively opened on the other sides of the first shaft sleeve and the second shaft sleeve. Accommodating through grooves for the other sides of the first shaft sleeve and the second shaft sleeve to be movably arranged are respectively opened on the inner side walls of the other ends of the first connecting plate and the second connecting plate. Inclined pin sliding holes are respectively and parallelly opened on the two inner side walls of the accommodating through groove. The pin holes of the first shaft sleeve and the second shaft sleeve are respectively inserted into the accommodating through grooves and are slidably connected with the pin sliding holes of the first connecting plate and the second connecting plate through the positioning pin.

[0008] Preferably, annular limiting grooves are respectively opened on the outer side walls of the bottom ends of the two pin shafts. Hooks which are opened upward and are engaged with the annular limiting grooves are respectively opened at the two ends of the buckle. The top ends of the two pin shafts are narrowed inward to form a flat column structure. Waist-shaped clamping holes which are engaged with the flat column structure are respectively opened at the two ends of the bayonet plate.

[0009] Preferably, it further includes a middle floating plate and a rotating shaft cover. The installation parts of the rotating shaft damping module are respectively fixedly arranged at both ends of the top opening of the rotating shaft cover. The middle floating plate is installed in the middle of the opening of the rotating shaft cover along the length direction of the rotating shaft cover. The rotating parts on both sides of the rotating shaft damping module can extend out from the gap between the middle floating plate and the two side walls of the top of the rotating shaft cover.

[0010] Preferably, a plurality of fixing convex columns are arranged at intervals along the length direction of the top surface of the rotating shaft cover. The fixing convex columns respectively pass upward through the fixing holes horizontally arranged at one end of the bayonet plate and the buckle and the through holes formed in the middle of the synchronizing member and are fixedly connected with the bottom surface of the middle floating plate.

[0011] Preferably, the first connecting plate and the second connecting plate are respectively inclined from the inner side wall close to the rotating shaft damping module to the outer side wall from bottom to top to form a trapezoidal structure. Arc-shaped grooves are respectively opened on the two outer end surfaces of the first connecting plate and the second connecting plate. Arc-shaped clamping strips located on both sides of each second sliding rail are respectively arranged at intervals on the bottom surface of each of the two side floating plates corresponding to each arc-shaped groove. The two side floating plates are respectively slidably connected with the first connecting plate and the second connecting plate through their respective arc-shaped clamping strips.

[0012] Preferably, the top surface of the middle floating plate is set as an inwardly concave arc surface. When the two side floating plates are folded inward relative to the middle floating plate, the cross-sectional shape formed by the two side floating plates and the middle floating plate is a water droplet shape.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The structure of the present utility model is novel and reasonably designed. When the two side floating plates are folded inward or outward to the horizontal state relative to the rotating shaft damping module, the first shaft sleeve and the second shaft sleeve can drive the synchronizing member to slide back and forth along the axial direction of the spiral chute of the first rotating member and the second rotating member. The first rotating member and the second rotating member can squeeze or release the damping component through the transmission structure to generate damping. This transmission method effectively reduces the possible virtual position during rotation, improves the reaction sensitivity, and the design structure of its rotating shaft damping module is compact, which can optimize the space occupation. In the same screen space, compared with the traditional rotating shaft structure, the space is smaller, significantly reducing the unfolded thickness and the thickness in the folded state, and the structure is stable, improving the overall use experience of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a structural schematic diagram of a folding hinge provided by an embodiment of the present utility model Figure 1 (in the horizontal unfolded state);

[0017] Figure 2 is an exploded structural schematic diagram of a folding hinge provided by an embodiment of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the rotating shaft damping module of a folding hinge provided by an embodiment of the present utility model Figure 1 (in the horizontal unfolded state);

[0019] Figure 4 is an exploded schematic diagram of the rotating shaft damping module of a folding hinge provided by an embodiment of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the synchronizing member of a folding hinge provided by an embodiment of the present utility model;

[0021] Figure 6It is a schematic structural diagram of a rotating member of a folding hinge provided by an embodiment of the present invention;

[0022] Figure 7 It is a schematic structure of a rotating shaft damping module of a folding hinge provided by an embodiment of the present invention Figure 2 (In the inward folding state);

[0023] Figure 8 It is a schematic structure of a folding hinge provided by an embodiment of the present invention Figure 2 (In the inward folding state);

[0024] Figure 9 It is a front view structural schematic diagram of a folding hinge provided by an embodiment of the present invention (in the inward folding state). Detailed implementation manners

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figure 1 , an embodiment of the present invention provides a folding hinge, which includes two side floating plates 1, two rotating shaft damping modules 2, a middle floating plate 4, a rotating shaft cover 5 and other components. Each component of this embodiment will be described in detail below with reference to the accompanying drawings.

[0027] As Figure 1 , Figure 2 and Figure 8 shown, the side floating plates 1 can be respectively installed on the rotating parts on both sides of the two rotating shaft damping modules 2. The installation parts of the rotating shaft damping modules 2 are respectively fixedly arranged at both ends of the top opening of the rotating shaft cover 5. The middle floating plate 4 is installed in the middle of the opening of the rotating shaft cover 5 along the length direction of the rotating shaft cover 5. The rotating parts on both sides of the rotating shaft damping module 2 can extend out from the gap between the middle floating plate 4 and the two side walls of the top of the rotating shaft cover 5. Specifically in implementation, the two side floating plates 1 can be folded inward or unfolded outward to the horizontal state relative to the middle floating plate 4.

[0028] Among them, the two side floating plates 1 form the internal main frame of the flexible folding screen and play a role in supporting the flexible screen. The folding screen can be a common flexible screen on the market. The flexible screen needs to include a foldable area corresponding to the rotating shaft structure and two non-foldable areas connected to both sides of the foldable area, such as various flexible components with corresponding functions such as flexible display screens, flexible touch screens, and flexible touch display screens. This embodiment does not limit it.

[0029] As Figures 3 to 6 shown, the rotating shaft damping module 2 can include a synchronizing member 21, a first bushing 22, a second bushing 23, a first rotating member 24, a second rotating member 25, a pin shaft 26, a buckle 27, a bayonet plate 28, a damping component 29, a first connecting plate 210, and a second connecting plate 211. On the two outer sides of one end of the synchronizing member 21, two limiting hole columns 212 axially opened are respectively arranged at intervals. The two pin shafts 26 are respectively inserted into the limiting hole columns 212 on both sides of the synchronizing member 21. The bayonet plate 28 and the buckle 27 are respectively fixedly arranged in parallel at the upper and lower ends of the two pin shafts 26. One side of the first bushing 22 and the second bushing 23 are respectively rotatably sleeved on the upper parts of their respective corresponding pin shafts 26 and are located between the two limiting hole columns 212 arranged on the same side. The other sides of the first bushing 22 and the second bushing 23 are respectively slidably connected to one end of the first connecting plate 210 and the second connecting plate 211 in the horizontal direction through positioning members.

[0030] Furthermore, on the two outer sides of the other end of the synchronizing member 21, spiral sliders 213 can be respectively arranged. The sleeve holes 241 arranged on one side of the first rotating member 24 and the second rotating member 25 are respectively rotatably sleeved on the lower parts of their respective corresponding pin shafts 26 and make their tops abut against the clamping blocks 261 fixed to the middle parts of the pin shafts 26. Spiral chutes 242 corresponding to the shapes of the spiral sliders 213 are opened on the outer side walls of the sleeve holes 241. The two spiral sliders 213 of the synchronizing member 21 are respectively slidably connected to the spiral chutes 242 of the first rotating member 24 and the second rotating member 25. The first connecting plate 210 and the second connecting plate 211 are respectively slidably connected to their corresponding first rotating member 24 and second rotating member 25. The two side floating plates 1 are respectively installed on their corresponding first connecting plate 210 and second connecting plate 211 and are respectively slidably connected to the first rotating member 24 and the second rotating member 25. The two sides of the damping component 29 are respectively sleeved on the two pin shafts 26 and are located between the bottom ends of the first rotating member 24 and the second rotating member 25 and the buckle 27.

[0031] As Figure 7As shown in the figure, during specific implementation, when the two side floating plates 1 are folded inward or opened outward to the horizontal state relative to the rotating shaft damping module 2, the first bushing 22 and the second bushing 23 can drive the synchronizing member 21 to slide back and forth along the axial direction of the spiral chute 242 of the first rotating member 24 and the second rotating member 25. The first rotating member 24 and the second rotating member 25 can squeeze or release the damping assembly 29 through the transmission structure to generate damping.

[0032] Among them, the first bushing 22, the second bushing 23, the first rotating member 24, and the second rotating member 25 can all be synchronized to fold inward or expand horizontally outward with their respective corresponding first connecting plates 210 and second connecting plates 211, which are used to transmit power, adjust resistance during movement, and control the damping effect.

[0033] Specifically, the damping assembly 29 may include a cam plate 291, a spring 292, and a baffle 293. The two ends of the cam plate 291 and the baffle 293 are respectively movably sleeved on two pin shafts 26. The bottom end surfaces of the first rotating member 24 and the second rotating member 25 are set as the first concave-convex surface 243. The side of the cam plate 291 close to the first concave-convex surface 243 is set as the second concave-convex surface 294 that matches its shape. The first concave-convex surface 243 and the second concave-convex surface 294 are arranged in a concave-convex fit with each other. The other side of the cam plate 291 is formed with a spring limit post 295 protruding. The side of the baffle 293 close to the cam plate 291 protrudes with a limit convex post 296. There are three springs 292, which are respectively sleeved on two pin shafts 26, and are also located between the spring limit post 295 and the limit convex post 296 and between the cam plate 291 and the baffle 293.

[0034] Among them, the first concave-convex surface 243 and the second concave-convex surface 294 can be mutually clamped, and can squeeze the spring 292 and effectively transmit torque when folding inward or expanding horizontally outward, generating a closing self-locking and an expanding 180° self-locking torque to restore the overall stable state of the flexible folding screen.

[0035] On the other side of the first rotating member 24 and the second rotating member 25, first sliding rails 251 can be respectively extended. At the top surface of one end of the first connecting plate 210 and the second connecting plate 211, first sliding chutes 2101 are recessed. The first sliding rails 251 of the first rotating member 24 and the second rotating member 25 are respectively slidably connected to the first sliding chutes 2101 of their respective corresponding first connecting plates 210 and second connecting plates 211. On the bottom surfaces of the two side floating plates 1, second sliding rails 11 are respectively arranged at intervals. The second sliding rails 11 of the side floating plates 1 are respectively slidably connected to the second sliding chutes 252 formed in the middle of the first sliding rails 251 of their respective first rotating members 24 and second rotating members 25.

[0036] Preferably, the positioning member can be set as a positioning pin 31. On the other sides of the first bushing 22 and the second bushing 23, pin holes 221 are respectively formed. On the inner side walls of the other ends of the first connecting plate 210 and the second connecting plate 211, accommodating through grooves 2102 for the activities of the other sides of the first bushing 22 and the second bushing 23 are respectively formed. On the two inner side walls of the accommodating through groove 2102, inclined pin sliding holes 2103 are respectively formed in parallel. The pin holes 221 of the first bushing 22 and the second bushing 23 are respectively inserted into the accommodating through groove 2102 and are slidably connected with the pin sliding holes 2103 of the first connecting plate 210 and the second connecting plate 211 through the positioning pin 31.

[0037] Specifically, in order to prevent the two pin shafts 26 from disengaging from the buckle 27 and the bayonet plate 28, annular limiting grooves 262 can be respectively formed on the outer side walls of the bottom ends of the two pin shafts 26. At both ends of the buckle 27, hook-shaped catches 271 which are arranged with openings upward and are engaged with the annular limiting grooves 262 are respectively formed. The top ends of the two pin shafts 26 are narrowed inward to form a flat column structure. Waist-shaped clamping holes 281 which are engaged with the flat column structure are respectively formed at both ends of the bayonet plate 28. Among them, the hook-shaped catches 271 of the buckle 27 can limit the annular limiting grooves 262 of the pin shaft 26 to fix the pin shaft 26. The top end of the pin shaft 26 is designed with a flat column structure, which not only can prevent the pin shaft 26 from rotating during work but also provides better bearing capacity for the pin shaft 26, enhancing the overall stability.

[0038] Preferably, a plurality of fixing convex columns 51 can be arranged at intervals along the length direction of the top surface of the rotating shaft cover 5. The fixing convex columns 51 respectively pass upward through the fixing holes 272 which are horizontally arranged at one end of the bayonet plate 28 and the buckle 27 and the through holes 2100 formed in the middle of the synchronizing member 21 and are fixedly connected with the bottom surface of the middle floating plate 4.

[0039] In this embodiment, the first connecting plate 210 and the second connecting plate 211 can be respectively inclined from the inner side wall close to the rotating shaft damping module 2 to the outer side wall from bottom to top to form a trapezoid structure. Arc-shaped grooves 2104 are respectively formed on the two outer end faces of the first connecting plate 210 and the second connecting plate 211. On the bottom surfaces of the two side floating plates 1, arc-shaped clamping strips 12 which are located on both sides of each second slide rail 11 are respectively arranged at intervals corresponding to each arc-shaped groove 2104. The two side floating plates 1 are respectively slidably connected with the first connecting plate 210 and the second connecting plate 211 through their respective arc-shaped clamping strips 12.

[0040] As Figure 9 shown, the top surface of the middle floating plate 4 can be set as an inwardly concave arc-shaped surface 41. When the two side floating plates 1 are folded inward relative to the middle floating plate 4, the cross-sectional shape formed by the two side floating plates 1 and the middle floating plate 4 is a water droplet shape.

[0041] Among them, the inwardly concave arc surface at the top of the middle floating plate 4 can increase the overall strength of the structure while reducing the folding or unfolding resistance. When the two side floating plates 1 are folded inward, a water droplet-shaped cross-section is formed together with the middle floating plate. In the same screen-containing space, this structure has a smaller space than other traditional rotating shafts, mainly reflected in the thinner thickness in the unfolded state and the folded state, which can save space and has a stable structure.

[0042] The working principle of this embodiment is as follows:

[0043] As Figure 1 、 Figure 3 、 Figure 7 and Figure 8 shown, when the two side floating plates are in the horizontal unfolded state, at this time, the positions of the first bushing and the second bushing on the pin shaft are at one end close to the first rotating member and the second rotating member. When the user holds the two side screens and folds them inward, it can drive the two side floating plates to fold inward synchronously relative to the middle floating plate. During the inward folding process, the first bushing, the second bushing, the first rotating member and the second rotating member can rotate relative to the two pin shafts. When the first bushing and the second bushing rotate, they can move downward through the positioning pins from the pin holes of their respective corresponding first connecting plates and second connecting plates, and drive the spiral sliders of the synchronizing member to move away from the damping assembly along the threaded chutes of the first rotating member and the second rotating member. At the same time, during the rotation of the first rotating member and the second rotating member, the first concave-convex surfaces thereon rotate synchronously and can respectively drive the cam plates in concave-convex contact with the first concave-convex surfaces to squeeze towards the compression direction of the spring, thereby generating damping. The first sliding rails extending outward from the first rotating member and the second rotating member can also move downward a certain distance in the first sliding chutes of their respective corresponding first connecting plates and second connecting plates, and moreover, the second sliding rails of the two side floating plates can also move upward a certain distance in the second sliding chutes of the first rotating member and the second rotating member. When the two side floating plates rotate from the folded position to the horizontal unfolded position, the above rotation process can be carried out in the reverse order.

[0044] To sum up, when the two side floating plates of the present utility model are folded inward or opened outward to the horizontal state relative to the rotating shaft damping module, the first bushing and the second bushing can drive the synchronizing member to slide back and forth along the axial direction of the threaded chutes of the first rotating member and the second rotating member. The first rotating member and the second rotating member can squeeze or release the damping assembly through the transmission structure to generate damping. This transmission method effectively reduces the possible play during rotation, improves the reaction sensitivity, the design structure of its rotating shaft damping module is compact, can optimize the space occupation, has a smaller space than the traditional rotating shaft structure in the same screen-containing space, significantly reduces the thickness in the unfolded state and the folded state, and has a stable structure, improving the overall use experience of the machine.

[0045] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A folding hinge, characterized in that: It includes two side floating plates (1) and two rotating shaft damping modules (2). The side floating plates (1) are respectively installed on the rotating parts on both sides of the two rotating shaft damping modules (2). The rotating shaft damping module (2) includes a synchronizing member (21), a first bushing (22), a second bushing (23), a first rotating member (24), a second rotating member (25), a pin shaft (26), a buckle (27), a bayonet plate (28), a damping component (29), a first connecting plate (210) and a second connecting plate (211). On the two outer sides at one end of the synchronizing member (21), two limiting hole columns (212) opened along the axial direction are respectively arranged at intervals. Two pin shafts (26) are respectively inserted into the limiting hole columns (212) on both sides of the synchronizing member (21). The bayonet plate (28) and the buckle (27) are respectively and correspondingly fixedly arranged in parallel at the upper and lower ends of the two pin shafts (26). One side of the first bushing (22) and the second bushing (23) is respectively rotatably sleeved on the upper part of the corresponding pin shaft (26) and is located between the two limiting hole columns (212) arranged on the same side. The other sides of the first bushing (22) and the second bushing (23) are respectively slidably connected in the horizontal direction with one end of the first connecting plate (210) and the second connecting plate (211) through positioning members. On the two outer sides at the other end of the synchronizing member (21), spiral sliders (213) are respectively arranged. Sleeve holes (241) provided on one side of the first rotating member (24) and the second rotating member (25) are respectively rotatably sleeved on the lower part of the corresponding pin shaft (26) and make their tops abut against a clamping block (261) fixed in the middle of the pin shaft (26). A spiral chute (242) corresponding to the shape of the spiral slider (213) is opened on the outer side wall of the sleeve hole (241). The two spiral sliders (213) of the synchronizing member (21) are respectively slidably connected with the spiral chutes (242) of the first rotating member (24) and the second rotating member (25). The first connecting plate (210) and the second connecting plate (211) are respectively slidably connected with the corresponding first rotating member (24) and the second rotating member (25). The two side floating plates (1) are respectively installed on the corresponding first connecting plate (210) and the second connecting plate (211) and are respectively slidably connected with the first rotating member (24) and the second rotating member (25). The two sides of the damping component (29) are respectively sleeved on the two pin shafts (26) and are located between the bottom ends of the first rotating member (24) and the second rotating member (25) and the buckle (27). When the two side floating plates (1) are folded inwards or opened outwards to the horizontal state relative to the rotating shaft damping module (2), the first bushing (22) and the second bushing (23) can drive the synchronizing member (21) to slide back and forth along the axial direction of the spiral chutes (242) of the first rotating member (24) and the second rotating member (25). The first rotating member (24) and the second rotating member (25) can squeeze or release the damping component (29) through a transmission structure to generate damping.

2. The folding hinge according to claim 1, wherein: The damping assembly (29) includes a cam plate (291), a spring (292), and a baffle (293). The two ends of the cam plate (291) and the baffle (293) are respectively movably sleeved on two pin shafts (26). The bottom end surfaces of the first rotating member (24) and the second rotating member (25) are provided with a first concave-convex surface (243). The side of the cam plate (291) close to the first concave-convex surface (243) is provided with a second concave-convex surface (294) that matches its shape. The first concave-convex surface (243) and the second concave-convex surface (294) are arranged in a concave-convex fit. On the other side of the cam plate (291), a spring limiting post (295) is formed in a convex shape. On the side of the baffle (293) close to the cam plate (291), a limiting convex post (296) is protruded. There are three springs (292), which are respectively sleeved on two pin shafts (26), and are also located between the cam plate (291) and the baffle (293) between the spring limiting post (295) and the limiting convex post (296).

3. A folding hinge according to claim 1, characterized in that: On the other sides of the first rotating member (24) and the second rotating member (25), first sliding rails (251) are respectively extended. On the top surfaces at one ends of the first connecting plate (210) and the second connecting plate (211), first sliding grooves (2101) are recessed. The first sliding rails (251) of the first rotating member (24) and the second rotating member (25) are respectively slidably connected to the first sliding grooves (2101) of their corresponding first connecting plate (210) and second connecting plate (211). On the bottom surfaces of the two side floating plates (1), second sliding rails (11) are respectively arranged at intervals. The second sliding rails (11) of the side floating plates (1) are respectively slidably connected to second sliding grooves (252) formed in the middle of the first sliding rails (251) of their corresponding first rotating member (24) and second rotating member (25).

4. A folding hinge according to claim 1, wherein: The positioning member is set as a positioning pin (31). On the other sides of the first shaft sleeve (22) and the second shaft sleeve (23), pin holes (221) are respectively opened. On the inner side walls at the other ends of the first connecting plate (210) and the second connecting plate (211), accommodating through grooves (2102) for the other sides of the first shaft sleeve (22) and the second shaft sleeve (23) to be movably arranged are respectively opened. On the two inner side walls of the accommodating through groove (2102), inclined pin sliding holes (2103) are respectively and parallelly opened. The pin holes (221) of the first shaft sleeve (22) and the second shaft sleeve (23) are respectively inserted into the accommodating through groove (2102) and are slidably connected to the pin sliding holes (2103) of the first connecting plate (210) and the second connecting plate (211) through the positioning pin (31).

5. The folding hinge according to claim 1, wherein: On the outer side walls at the bottom ends of the two pin shafts (26), annular limiting grooves (262) are respectively opened. At the two ends of the buckle (27), hooks (271) that are opened upward and are engaged with the annular limiting grooves (262) are respectively opened. The top ends of the two pin shafts (26) are narrowed inward to form a flat column structure. At the two ends of the bayonet plate (28), waist-shaped bayonet holes (281) that are engaged with the flat column structure are respectively opened.

6. The folding hinge according to claim 3, characterized in that: It further includes a middle floating plate (4) and a rotating shaft cover (5). The installation parts of the rotating shaft damping module (2) are respectively fixedly arranged at both ends of the top opening of the rotating shaft cover (5). The middle floating plate (4) is installed in the middle of the opening of the rotating shaft cover (5) along the length direction of the rotating shaft cover (5). The rotating parts on both sides of the rotating shaft damping module (2) can extend out from the gap between the middle floating plate (4) and the two side walls at the top of the rotating shaft cover (5).

7. A folding hinge according to claim 6, characterized in that: A plurality of fixing convex columns (51) are arranged at intervals along the length direction of the top surface of the rotating shaft cover (5). The fixing convex columns (51) respectively pass upward through the fixing holes (272) horizontally arranged at one end of the bayonet plate (28) and the buckle (27) and the through holes (2100) opened in the middle of the synchronizing member (21), and then are fixedly connected to the bottom surface of the middle floating plate (4).

8. A folding hinge according to claim 6, characterized in that: The first connecting plate (210) and the second connecting plate (211) are respectively inclined from the inner side wall close to the rotating shaft damping module (2) to the outer side wall from bottom to top to form a trapezoidal structure. Arc-shaped grooves (2104) are respectively opened on the two outer end faces of the first connecting plate (210) and the second connecting plate (211). Arc-shaped clamping strips (12) located on both sides of each second slide rail (11) are respectively arranged at intervals on the bottom surfaces of the two side floating plates (1) corresponding to each arc-shaped groove (2104). The two side floating plates (1) are slidably connected to the first connecting plate (210) and the second connecting plate (211) respectively through their respective arc-shaped clamping strips (12).

9. The folding hinge according to claim 8, wherein: The top surface of the middle floating plate (4) is set as an inwardly concave arc surface (41). When the two side floating plates (1) are folded inward relative to the middle floating plate (4), the cross-sectional shape formed by the two side floating plates (1) and the middle floating plate (4) is a water droplet shape.

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