Hinge screw rod structure of folding screen

Abstract

The invention discloses a folding screen hinge lead screw structure which comprises a first shell, a second shell, a rotating shaft damping device, a first shaft sleeve, a second shaft sleeve, a first synchronous gear arm and a second synchronous gear arm. One end of the first shell and one end of the second shell are rotationally connected with one side of the first shaft sleeve and one side of the second shaft sleeve in the horizontal direction through corresponding sliding pieces, and the other side of the first shaft sleeve and the other side of the second shaft sleeve are connected to the two sides of the upper portion of the rotating shaft damping device in a sleeving mode and are in transmission connection with the rotating shaft damping device. The sliding rails of the first synchromesh gear arm and the second synchromesh gear arm are in sliding connection with the sliding grooves of the corresponding first shell and second shell respectively, and the inner sides of the first synchromesh gear arm and the second synchromesh gear arm are connected to the two sides of the lower portion of the rotating shaft damping device in a sleeving mode respectively and rotationally connected with the rotating shaft damping device. Smooth inward folding and outward unfolding actions can be provided for the flexible folding screen, assembling is easy, the structure is ingenious, the structural strength is improved, using is stable and reliable, and the using hand feeling of the flexible folding screen can be improved.

Description

Technical Field

[0001] This invention relates to the field of flexible folding screen technology, and more specifically, to a hinge screw structure for folding screens. Background Technology

[0002] Foldable phones, as the name suggests, are smartphones with foldable screens. Their design allows users to unfold the screen to transform it into tablet mode when a larger display area is needed, or fold the screen when needed, so that it functions like a traditional flat-screen phone. This flexible design allows foldable phones to provide diverse user experiences in different scenarios. Foldable phones mainly fold in two ways: vertical folding and horizontal folding. Horizontal folding can be further subdivided into inward folding and outward folding. In the structure of a foldable phone, the hinge structure is key to enabling the screen flipping function.

[0003] Existing folding screen folding structures, such as the one disclosed in invention patent CN110083209A, include a flexible screen component, a housing, and a connecting component. After bending, the flexible screen component forms a bending axis extending along a first direction in the bending area. The connecting component includes a first guide block, a second guide block, and a connector. The first guide block is slidably mounted on the first housing, and the second guide block is slidably mounted on the second housing. The first and second guide blocks are connected by the connector, and the first guide block can rotate relative to the second guide block along a flip axis parallel to the first direction. This patent uses a hinge or pivot to achieve screen folding and unfolding. However, in actual use, this connection design may lead to instability and poor tactile feedback during operation, affecting the overall user experience. Therefore, the design and optimization of folding screen phone hinges urgently require the invention of a more stable pivot structure to improve the smoothness and comfort of operation, thereby enhancing the user's interactive experience. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a folding screen hinge screw structure that is simple to assemble, ingenious in structure, highly stable, increases structural strength, is more stable and reliable in use, and can improve the user experience of flexible folding screens.

[0005] To achieve the above objectives, the present invention provides a hinge screw structure for a folding screen, comprising a first housing, a second housing, a pivot damping device, a first bushing, a second bushing, a first synchronous gear arm, and a second synchronous gear arm. One end of the first housing and the second housing are respectively rotatably connected to one side of the first bushing and the second bushing in the horizontal direction via corresponding sliding members. The other sides of the first bushing and the second bushing are respectively sleeved on the upper sides of the pivot damping device and connected to it for transmission. The top surface of the other end of the first housing and the second housing is recessed with a sliding groove. The first synchronous gear arm and the second synchronous gear arm are arranged opposite to each other and have slide rails extending from their outer sides. The slide rails of the first synchronous gear arm and the second synchronous gear arm are respectively slidably connected to the corresponding sliding grooves of the first housing and the second housing. The inner sides of the first synchronous gear arm and the second synchronous gear arm are respectively sleeved on the lower sides of the pivot damping device and connected to it for rotation. The pivot damping device includes two... The device comprises a lead screw shaft, a first fixed baffle, a second fixed baffle, and a damping assembly. The two ends of the lead screw shaft are fixedly connected to the first and second fixed baffles, respectively, and are spaced apart along the length of the first and second housings. Each end of the lead screw shaft is composed of a screw section and a sliding section. One side of the first and second bushings is threaded to the screw section of the lead screw shaft. The inner sides of the first and second synchronous gear arms are respectively sleeved on the sliding sections of the lead screw shaft. The second fixed baffle of the damping assembly is located between the inner sides of the first and second synchronous gear arms. When the first and second housings are folded inward or opened outward relative to the shaft damping device to a horizontal state, the first bushing and the first fixed baffle can move back and forth on the screw sections of the two lead screw shafts. The first and second synchronous gear arms can generate damping by squeezing or releasing the damping assembly through the transmission structure.

[0006] Preferably, the damping assembly includes two short shafts, two circular gears, four telescopic springs, a cam plate, and a third fixed baffle. One side of both the first and second synchronous gear arms is configured with a [-shaped structure], and each protruding part has a first sleeve hole and a second sleeve hole arranged axially opposite to each other. The first sleeve hole and the second sleeve hole are respectively fitted onto and rotatably connected to both ends of the sliding rod portion of the lead screw shaft. An arc-shaped gear is fixedly installed on the inner circumference of the first sleeve hole. The third fixed baffle is sleeved at the connection between the screw portion and the sliding rod portion of the lead screw shaft and the outer edge of the arc-shaped gear. Between the end faces, the two ends of the two short shafts are rotatably set between the third fixed baffle and the second fixed baffle, and are parallel to each other between the two long shafts of the lead screw. Two circular gears are fixedly sleeved on the two short shafts and mesh with each other. The two circular gears also mesh with the two outer arc-shaped gears respectively. The cam plate is movably sleeved on the sliding rod part of the short shaft and the long shaft of the lead screw. The front of the cam plate is in concave-convex contact with the bottom surface of the first sleeve hole. Four telescopic springs are respectively sleeved on the sliding rod part of the short shaft and the long shaft of the lead screw and are located on the back of the cam plate between the second fixed baffle.

[0007] Preferably, both the first and second sliding members include a connecting rod and a pin. Two first pin holes are formed at both ends of the connecting rod. Receiving grooves for the connecting rod to move are respectively formed on the inner side of one end of the first and second housings along their length. Second pin holes are vertically passed through each receiving groove. An inner shaft hole is formed on one side of each of the first and second bushings along their axial direction. A third pin hole is vertically passed through the other side of each of the first and second bushings. One end of each connecting rod is rotatably connected to the respective receiving groove of the first and second housings via a pin passing through the second and first pin holes. The other end of each connecting rod is rotatably connected to the first and second bushings via a pin passing through the third and first pin holes.

[0008] Preferably, the screw portion at one end of the lead screw long shaft passes through the inner shaft holes of the corresponding first and second bushings and is threadedly connected to them.

[0009] Preferably, the shaft damping device further includes four retaining rings. Arc-shaped limiting grooves are respectively opened at both ends of the two lead screw shafts. A limiting channel is horizontally opened in the middle of the second sleeve hole. Two retaining rings are respectively parallelly engaged in the arc-shaped limiting grooves at the top of the lead screw shaft and abut against the outer side of the first fixed baffle. The other two retaining rings are respectively parallelly engaged between the limiting channels of the second sleeve hole and rotate in contact with its two inner wall surfaces.

[0010] Preferably, the bottom surface of the first sleeve hole is configured as a first concave-convex surface, and the side of the cam plate near the first concave-convex surface is configured as a second concave-convex surface that matches its shape. The first concave-convex surface and the second concave-convex surface are configured to cooperate with each other.

[0011] Preferably, the cam plate has a first oblong hole through both ends that is sleeved on the slide rod portion of the lead screw shaft, and the first fixed baffle, the second fixed baffle, the third fixed baffle and the cam plate each have a second oblong hole through both ends that is sleeved on the lead screw shaft.

[0012] Preferably, the slide rails of the first and second synchronous gear arms are both formed by bending the extended portion away from the first and second sleeve holes downwards and then bending it into a horizontal state.

[0013] Preferably, the extension portions of the first and second bushings away from their inner shaft holes are both bent downwards and then bent into a horizontal state, and remain parallel to the slide rails of the first and second synchronous gear arms in the axial direction.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The present invention features a novel and rationally designed structure. When the first and second housings are folded inward or opened outward to a horizontal state relative to the pivot damping device, the first bushing and the first bushing can move back and forth on the screw section of the two lead screw shafts. The first and second synchronous gear arms generate damping by squeezing or releasing the damping component through the transmission structure. This provides smooth inward folding and outward unfolding movements for the flexible folding screen. The damping also enhances the user's operating experience, making the use of the folding screen phone smoother, more natural, and more comfortable. The present invention uses a lead screw connection to replace the traditional virtual axis + connecting rod connection method used in folding screens, simplifying the structure while increasing structural strength and stability, and greatly improving the feel of the folding screen phone. Attached Figure Description

[0016] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a hinge screw structure for a folding screen provided in an embodiment of the present invention. Figure 1 (Horizontal unfolded state);

[0018] Figure 2This is a partially exploded schematic diagram of a folding screen hinge screw structure provided in an embodiment of the present invention;

[0019] Figure 3 This is an exploded view of a hinge screw structure for a folding screen provided in an embodiment of the present invention. Figure 1 ;

[0020] Figure 4 This is a front view schematic diagram of a folding screen hinge screw structure provided in an embodiment of the present invention. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of a hinge screw structure for a folding screen provided in an embodiment of the present invention. Figure 2 (Folded inwards);

[0022] Figure 6 This is an exploded view of a hinge screw structure for a folding screen provided in an embodiment of the present invention. Figure 2 ;

[0023] Figure 7 This is a front view schematic diagram of a folding screen hinge screw structure provided in an embodiment of the present invention. Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the structure of a fixing baffle of a hinge screw structure for a folding screen provided in an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the bushing structure of a hinge screw structure for a folding screen provided in an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the synchronous gear arm of a folding screen hinge screw structure provided in an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the cam plate of a folding screen hinge screw structure provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0029] Please refer to Figure 1The present invention provides a hinge screw structure for a folding screen, including a first housing 1, a second housing 2, a pivot damping device 3, a first bushing 4, a second bushing 5, a first synchronous gear arm 6, and a second synchronous gear arm 7. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, one end of the first housing 1 and the second housing 2 can be rotatably connected to one side of the first bushing 4 and the second bushing 5 in the horizontal direction through their respective corresponding sliding parts. The other side of the first bushing 4 and the second bushing 5 are respectively sleeved on the upper two sides of the shaft damping device 3 and connected to it in a transmission manner. The top surface of the other end of the first housing 1 and the second housing 2 is provided with a groove 11. The first synchronous gear arm 6 and the second synchronous gear arm 7 are arranged opposite to each other and have a slide rail 61 extending on their outer side. The slide rail 61 of the first synchronous gear arm 6 and the second synchronous gear arm 7 are respectively slidably connected to the corresponding groove 11 of the first housing 1 and the second housing 2. The inner sides of the first synchronous gear arm 6 and the second synchronous gear arm 7 are respectively sleeved on the lower two sides of the shaft damping device 3 and connected to it in a rotation manner.

[0031] The first housing 1 and the second housing 2 form the internal main frame of the flexible folding screen, supporting it. The first bushing 4 and the second bushing 5, as well as the first synchronous gear arm 6 and the second synchronous gear arm 7, can all fold inward or unfold horizontally outward synchronously with their corresponding first housing 1 and second housing 2. This is used to transmit power and adjust resistance during movement, controlling the damping effect of the pivot damping device. Furthermore, the folding screen can be any commercially available flexible screen. A flexible screen needs to include a foldable area corresponding to the pivot structure, and two non-foldable areas connected to both sides of the foldable area, such as flexible displays, flexible touch screens, flexible touch displays, and other flexible components with corresponding functions. This embodiment does not impose any limitations on this.

[0032] like Figure 2 As shown, the shaft damping device 3 may include two lead screw shafts 31, a first fixed baffle 32, a second fixed baffle 33, and a damping assembly 34. The two ends of the lead screw shafts 31 are fixedly connected to the first fixed baffle 32 and the second fixed baffle 33 respectively and are spaced apart between the first housing 1 and the second housing 2 along their length direction. The two ends of the lead screw shafts 31 are respectively connected by a screw part 311 and a sliding part 312. One side of the first bushing 4 and the second bushing 5 are threadedly connected to the screw part 311 of the lead screw shafts 31 respectively. The inner sides of the first synchronous gear arm 6 and the second synchronous gear arm 7 are respectively sleeved on the sliding part 312 of the lead screw shafts 31. The second fixed baffle 33 of the damping assembly 34 is located between the inner sides of the first synchronous gear arm 6 and the second synchronous gear arm 7.

[0033] like Figure 3As shown, the damping assembly 34 may include two short shafts 341, two circular gears 342, four telescopic springs 343, a cam plate 344, and a third fixed baffle 345. One side of the first synchronous gear arm 6 and the second synchronous gear arm 7 are both configured with a [-shaped structure] and their protruding parts are provided with axially opposite first sleeve holes 62 and second sleeve holes 63. The first sleeve holes 62 and second sleeve holes 63 are respectively fitted onto and rotatably connected to both ends of the sliding rod portion 312 of the lead screw long shaft 31. An arc-shaped gear 621 is fixedly installed on the inner circumference of the first sleeve hole 62. The third fixed baffle 345 is sleeved between the connection between the screw portion 311 and the sliding rod portion 312 of the lead screw long shaft 31 and the outer end face of the arc-shaped gear 621. Two short shafts 341 are rotatably mounted at both ends between the third fixed baffle 345 and the second fixed baffle 33, and are located parallel to each other between the two long shafts 31 of the lead screw. Two circular gears 342 are fixedly sleeved on the two short shafts 341 and mesh with each other. The two circular gears 342 also mesh with the two outer arc-shaped gears 621 respectively. Cam plates 344 are movably sleeved on the slide rod parts 312 of the short shafts 341 and the long shafts 31 of the lead screw. The front of the cam plate 344 is in concave-convex contact with the bottom surface of the first sleeve hole 62. Four telescopic springs 343 are sleeved on the slide rod parts 312 of the short shafts 341 and the long shafts 31 of the lead screw and are located on the back of the cam plate 344 and between the second fixed baffle 33.

[0034] like Figure 9 As shown, the screw portion 311 at one end of the lead screw long shaft 31 can pass through the inner shaft hole 41 of the corresponding first bushing 4 and second bushing 5 and be threadedly connected to them.

[0035] Specifically, the screw portion 311 of the lead screw long shaft 31 is threadedly connected to the inner shaft hole 41 of the first bushing 4 and the second bushing 5, thereby providing a movement path while the inner shaft hole 41 of the first bushing 4 and the second bushing 5 rotates relative to the lead screw long shaft 31. The slide portion 312 allows the first synchronous gear arm 6 and the second synchronous gear arm 7 to rotate relative to it. The double connection enhances the transmission efficiency between the components and the coordination between the two sides, reduces the friction and wear between the components, and ensures the smoothness and fluidity of the displacement movement.

[0036] The damping component 34 limits the folding and unfolding range, preventing excessive folding or unfolding, and slowing down the folding and unfolding speed of the screen. This ensures that users can smoothly open or close the screen during operation, reducing damage to the screen and internal components and extending the device's lifespan. Furthermore, the damping component 34 provides smooth inward folding and outward unfolding movements, and the damping feel enhances the user experience, making the use of the foldable phone smoother, more natural, and more comfortable.

[0037] In specific implementation, when the first housing 1 and the second housing 2 are folded inward or opened outward to a horizontal state relative to the pivot damping device 3, the first bushing 4 and the first bushing 4 can move back and forth on the screw part 311 of the two lead screw long shafts 31. The first synchronous gear arm 6 and the second synchronous gear arm 7 can generate action and reaction forces by squeezing or releasing the damping component 34 through the transmission structure, thereby generating damping and improving the folding feel of the flexible folding screen.

[0038] Preferably, the sliding component may include a connecting rod 81 and a pin 82. Both ends of the connecting rod 81 have two first pin holes 811. The inner side of one end of the first housing 1 and the second housing 2 are respectively provided with accommodating grooves 12 for the connecting rod 81 to move along their length. The accommodating grooves 12 are respectively vertically penetrated by second pin holes 121. One side of the first bushing 4 and the second bushing 5 are respectively provided with an inner shaft hole 41 along their axial direction. The other side of the first bushing 4 and the second bushing 5 are respectively vertically penetrated by a third pin hole 42. One end of each connecting rod 81 passes through the second pin hole 121 and the first pin hole 811 through the pin 82 and is rotatably connected to the respective accommodating grooves 12 of the first housing 1 and the second housing 2. The other end of each connecting rod 81 passes through the third pin hole 42 and the first pin hole 811 through the pin 82 and is rotatably connected to the first bushing 4 and the second bushing 5 respectively.

[0039] The sliding member's design allows the connecting rod 81 to rotate within the receiving slot 12 of the first housing 1 and the second housing 2. It also allows the connecting rod 81 to rotate from its tilted state when the shaft structure is horizontally unfolded to a vertical state by folding it inward, thus improving the flexibility of the shaft structure.

[0040] like Figures 10 to 11 As shown, in this embodiment, the bottom surface of the first sleeve hole 62 can be configured as a first concave-convex surface 622, and the side of the cam plate 344 near the first concave-convex surface 622 is configured as a second concave-convex surface 3441 that matches its shape. The first concave-convex surface 622 and the second concave-convex surface 3441 are configured to engage with each other. They can interlock with each other and effectively transfer torque to compress the telescopic spring 343 when folding inward. They can also cooperate with the arc-shaped gear 621 and the circular gear 342 to generate action and reaction forces when folding inward or unfolding horizontally outward, so as to restore the overall stability of the flexible folding screen.

[0041] Furthermore, the two ends of the cam plate 344 can be provided with first oblong holes 3441 that are sleeved on the slide rod portion 312 of the lead screw shaft 31, and the two ends of the first fixed baffle 32, the second fixed baffle 33 and the third fixed baffle 345 are respectively provided with second oblong holes 36 that are sleeved on the lead screw shaft 31.

[0042] like Figure 4 and Figure 7 As shown, the slide rails 61 of the first synchronous gear arm 6 and the second synchronous gear arm 7 can both be formed by bending the extension portion on the side away from the first sleeve hole 62 and the second sleeve hole 63 downwards and then bending it into a horizontal state.

[0043] Correspondingly, the extensions of the first bushing 4 and the second bushing 5 on the side away from their inner shaft hole 41 can be bent downwards and then bent into a horizontal state, and remain parallel to the slide rails 61 of the first synchronous gear arm 6 and the second synchronous gear arm 7 in the axial direction.

[0044] Preferably, in order to prevent the lead screw shaft 31 from dislodging from the first fixed baffle 32 and the second fixed baffle 33, the shaft damping device 3 may also include four retaining springs 35. The two ends of the two lead screw shafts 31 are respectively provided with arc-shaped limiting grooves 313. The middle of the second sleeve hole 63 is horizontally provided with a limiting channel 631. Two retaining springs 35 are respectively parallelly engaged in the arc-shaped limiting grooves 313 at the top of the lead screw shaft 31 and abut against the outer side of the first fixed baffle 32. The other two retaining springs 35 are respectively parallelly engaged between the limiting channels 631 of the second sleeve hole 63 and rotate in contact with its two inner wall surfaces.

[0045] The working principle of this embodiment is as follows:

[0046] like Figure 1 and Figure 5 As shown, when the first and second housings are in a horizontally unfolded state, the first and second bushings are positioned near the damping assembly on the long shaft of the lead screw. When the user holds the screens on both sides and folds them inward, the first and second housings fold inward synchronously relative to the damping device. During this inward folding process, the first and second housings respectively drive their corresponding first and second bushings, first and second synchronous gear arms to rotate relative to the long shaft of the lead screw. The inner shaft holes of the first and second bushings are threaded into the long shaft of the lead screw, and when rotating along its axis, they can convert the rotational motion into linear motion, finally moving away from the damping assembly. The other end of the damping assembly abuts against the first fixed baffle. At this time, the connecting rod, driven by the corresponding first and second bushings, changes from an inclined state to a vertical state along the two pins in the accommodating slot. During the rotation of the first and second synchronous gear arms, the arc-shaped gears and the first concave-convex surface on them rotate synchronously and can respectively drive the circular gear meshing with the short shaft to rotate and press against the cam plate that is in concave-convex contact with the first concave-convex surface in the direction of compression of the telescopic spring, thereby generating damping. The slide rails extending from one side of the first and second synchronous gear arms can also move downward a certain distance in the corresponding slide grooves of the first and second housings. When the first and second housings rotate from the folded position to the horizontally unfolded position, the above rotation process is performed in reverse order.

[0047] In summary, when the first and second housings are folded inward or opened outward to a horizontal state relative to the pivot damping device, the first bushing and the first bushing can move back and forth on the screw section of the two lead screw shafts. The first and second synchronous gear arms generate damping by squeezing or releasing the damping component through the transmission structure. This provides smooth inward folding and outward unfolding movements for the flexible folding screen. The damping also enhances the user's operating experience, making the use of the folding screen phone smoother, more natural, and more comfortable. The present invention uses a lead screw connection to replace the traditional virtual axis + connecting rod connection method used in folding screens, simplifying the structure while increasing structural strength and stability, and greatly improving the feel of the folding screen phone.

[0048] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A folding screen hinge screw structure, characterized in that: The invention comprises a first housing (1), a second housing (2), a rotating shaft damping device (3), a first shaft sleeve (4), a second shaft sleeve (5), a first synchronous gear arm (6) and a second synchronous gear arm (7); one end of the first housing (1) and the second housing (2) are respectively connected to one side of the first shaft sleeve (4) and the second shaft sleeve (5) for rotation in the horizontal direction through respective corresponding sliding members; the other sides of the first shaft sleeve (4) and the second shaft sleeve (5) are respectively sleeved on both sides of the upper part of the rotating shaft damping device (3) and are transmission-connected thereto; the top surfaces of the other ends of the first housing (1) and the second housing (2) are concavely provided with sliding grooves ( 11), the first synchronous gear arm (6) and the second synchronous gear arm (7) are arranged opposite to each other and have a slide rail (61) extending outside thereof, the slide rails (61) of the first synchronous gear arm (6) and the second synchronous gear arm (7) are respectively slidably connected to the slide grooves (11) of the first housing (1) and the second housing (2) respectively corresponding thereto, the inner sides of the first synchronous gear arm (6) and the second synchronous gear arm (7) are respectively sleeved on both sides of the lower part of the rotating shaft damping device (3) and are rotatably connected thereto, the rotating shaft damping device (3) comprises two screw shafts (31), a first fixed baffle plate (32), and a second fixed baffle plate (3 3) and a damping assembly (34), the two ends of the screw shaft (31) are respectively fixedly connected to the first fixed baffle (32) and the second fixed baffle (33) and are arranged between the first shell (1) and the second shell (2) along the length direction thereof, the two ends of the screw shaft (31) are respectively connected by a screw portion (311) and a slide portion (312), one side of the first shaft sleeve (4) and the second shaft sleeve (5) are respectively threadedly connected to the screw portion (311) of the screw shaft (31), the inner sides of the first synchronous gear arm (6) and the second synchronous gear arm (7) are respectively sleeved on the screw shaft The damping assembly (34) and the second fixed baffle (33) are both located between the inner sides of the first synchronous gear arm (6) and the second synchronous gear arm (7). When the first housing (1) and the second housing (2) are folded inwardly or opened outwardly to a horizontal state relative to the rotating shaft damping device (3), the first sleeve (4) and the first sleeve (4) can move back and forth on the screw rod parts (311) of the two screw rod long shafts (31). The first synchronous gear arm (6) and the second synchronous gear arm (7) can squeeze or release the damping assembly (34) through the transmission structure to generate damping.

2. A folding screen hinge screw structure according to claim 1, characterized in that: The damping assembly (34) comprises two short shafts (341), two circular gears (342), four telescopic springs (343), a cam plate (344), and a third fixed baffle (345). One side of the first synchronous gear arm (6) and the second synchronous gear arm (7) are both arranged as a [-shaped structure and are provided with a first sleeve hole (62) and a second sleeve hole (63) axially opposite to each other at their protruding parts. The first sleeve hole (62) and the second sleeve hole (63) are respectively sleeved and rotatably connected to the two ends of the sliding rod part (312) of the screw shaft (31). An arc gear (621) is fixedly arranged on the inner circumference of the first sleeve hole (62). The third fixed baffle (345) is sleeved between the connection between the screw shaft part (311) and the sliding rod part (312) of the screw shaft (31) and the outer end surface of the arc gear (621). The two ends of the two short shafts (341) are rotatably arranged between the third fixed baffle (345) and the second fixed baffle (33) and are located between the two screw rod long shafts (31) in parallel and at intervals. The two circular gears (342) are respectively fixedly sleeved on the two short shafts (341) and meshed with each other. The two circular gears (342) are also respectively meshed with the arc gears (621) on the two outer sides. The cam plate (344) is movably sleeved on the short shaft (341) and the sliding rod part (312) of the screw rod long shaft (31). The front face of the cam plate (344) is in concave-convex contact with the bottom face of the first sleeve hole (62). Four telescopic springs (343) are respectively sleeved on the short shaft (341) and the sliding rod part (312) of the screw rod long shaft (31) and are located on the back face of the cam plate (344) and between the second fixed baffle (33).

3. The folding screen hinge screw structure according to claim 1, characterized in that: The sliding member comprises a connecting rod (81) and a pin (82), two first pin holes (811) are provided at both ends of the connecting rod (81), accommodating grooves (12) for movably setting the connecting rod (81) are provided on the inner sides of one end of the first shell (1) and the second shell (2) along their length direction, respectively, and the accommodating grooves (12) are vertically penetrated by second pin holes (121), one side of the first shaft sleeve (4) and the second shaft sleeve (5) are provided with inner shaft holes (41) along their axial direction, and the first A third pin hole (42) vertically penetrates the other side of the shaft sleeve (4) and the second shaft sleeve (5); one end of each connecting rod (81) is respectively rotatably connected to the respective receiving grooves (12) of the first shell (1) and the second shell (2) after passing through the second pin hole (121) and the first pin hole (811) through the pin (82); the other end of each connecting rod (81) is respectively rotatably connected to the first shaft sleeve (4) and the second shaft sleeve (5) after passing through the third pin hole (42) and the first pin hole (811) through the pin (82).

4. The folding screen hinge screw structure according to claim 3, characterized in that: The screw rod portion (311) at one end of the screw rod long axis (31) passes through the inner shaft holes (41) of the first shaft sleeve (4) and the second shaft sleeve (5) respectively and is threadedly connected to the two.

5. The folding screen hinge screw structure according to claim 2, characterized in that: The rotating shaft damping device (3) also includes four retaining springs (35), and arc-shaped limit grooves (313) are respectively correspondingly provided at the two end portions of the two screw shafts (31), and a limit channel (631) is horizontally provided in the middle of the second sleeve hole (63), wherein two retaining springs (35) are respectively and parallelly clamped in the arc-shaped limit grooves (313) at the top ends of the screw shafts (31) and abut against the outer side surface of the first fixed baffle (32), and the other two retaining springs (35) are respectively and parallelly clamped between the limit channels (631) of the second sleeve hole (63) and are in rotational contact with the two inner wall surfaces thereof.

6. The folding screen hinge screw structure according to claim 2, characterized in that: The bottom end surface of the first sleeve hole (62) is set as a first concave-convex surface (622), and the side of the cam plate (344) close to the first concave-convex surface (622) is set as a second concave-convex surface (3441) adapted to its shape, and the first concave-convex surface (622) and the second concave-convex surface (3441) are arranged to match each other in a concave-convex manner.

7. The folding screen hinge screw structure according to claim 2, characterized in that: The two ends of the cam plate (344) are penetrated by a first waist-shaped hole (3441) which is sleeved on the sliding rod part (312) of the screw rod long axis (31); the first fixed baffle plate (32), the second fixed baffle plate (33), the third fixed baffle plate (345) and the two ends of the cam plate (344) are penetrated by a second waist-shaped hole (36) which is sleeved on the screw rod long axis (31).

8. The folding screen hinge screw structure according to claim 2, characterized in that: The slide rails (61) of the first synchronous gear arm (6) and the second synchronous gear arm (7) are formed by bending the extended portion away from the first sleeve hole (62) and the second sleeve hole (63) downwardly and then bending into a horizontal state.

9. The folding screen hinge screw structure according to claim 3, characterized in that: The extension portions of the first shaft sleeve (4) and the second shaft sleeve (5) away from the inner shaft hole (41) thereof are bent downwardly and then bent into a horizontal state and remain parallel to the slide rails (61) of the first synchronous gear arm (6) and the second synchronous gear arm (7) in the axial direction.

Images