MECANISMO DE DOBRADIÇA ROTATIVA E TELA DE TETO MONTADA EM VEÍCULO

Abstract

The present application relates to the technical field of roof-mounted screens, solves the technical problems of poor damping quality and poor user use experience of rotary hinges of manual roof-mounted screens, and provides a rotary hinge mechanism and a vehicle roof-mounted screen. The rotary hinge mechanism comprises a base body and a circular rotating shaft. A damping member is provided on the base body, the damping member comprises at least one shaft sleeve, each shaft sleeve comprises a through hole, and a pressing plane is provided on an inner wall of the through hole. The circular rotating shaft comprises at least one damping shaft section, and a circumferential surface of each damping shaft section is provided with a rotating shaft plane. The damping shaft section is rotatably accommodated in the corresponding through hole. The beneficial effects of the present application are that: when the damping shaft section rotates until the rotating shaft plane abuts the pressing plane of the inner wall of the shaft sleeve, a rotational torque is generated between the two planes, achieving multi-stage rotational torque change of the rotary hinge mechanism, achieving better rotating damping quality, and improving the user use experience.

Description

1 / 20 ROTATING HINGE MECHANISM AND VEHICLE-MOUNTED ROOF SCREEN Technical Field

[001] The present invention relates to the technical field of roof screens, in particular to a rotary hinge mechanism with multi-stage torque change and a vehicle-mounted roof screen. Background

[002] In recent years, energy vehicles have been gradually developing, vehicle-mounted entertainment functions have rapidly become popular, and the solution of a vehicle-mounted roof screen is gradually gaining popularity in the market.

[003] The user experience of an electric sunroof screen is good, but its cost is high, which is not conducive to popularization and use in vehicles at all levels. The cost of a manual sunroof screen is relatively low, but most manual sunroof screens use a relatively low-quality rotary hinge mechanism, although the price is low, its damping texture is poor, the total operating force in a manual screen opening process is large, and the comfort is poor, resulting in a poor impression of low quality and poor quality for a user, which is not conducive to the user experience for the entire vehicle.The use of a top-end rotary hinge mechanism, such as a hydraulic damping hinge, can improve the user experience of manually opening the screen; however, the structure of the rotary hinge mechanism is complex, and the production and purchase costs are high, therefore it does not meet the low-cost control requirements of a manual ceiling screen. Furthermore, the complex structural design leads to a relatively high failure rate, and the costs of use and maintenance are high. Petition 870260066501, dated 06 / 07 / 2026, page 6 / 32 2 / 20 User nutrition in the post-operative period is also relatively high.

[004] Therefore, a rotating hinge mechanism used by the existing roof screen mounted on the vehicle needs to be improved to solve the above problems. Summary

[005] To solve the above technical problem, the present invention provides a rotary hinge mechanism with a rotational torque that changes with a change in the angle of rotation and a vehicle-mounted roof screen that adopts the rotary hinge mechanism.

[006] To solve the problem, in one aspect of the present invention, a rotary hinge mechanism is provided, which includes a seat body and a round rotary shaft, a damping element is disposed in the seat body, the damping element includes at least one shaft sleeve, each of at least one shaft sleeve includes a through hole, and a pressure plane is disposed in an inner wall of the through hole.

[007] The round rotating shaft includes at least one damping shaft section, and a rotating shaft plane is disposed on a circumferential face of each of at least one damping shaft section; and the damping shaft section is rotatably placed in the corresponding through hole, and the damping shaft section rotates until the rotating shaft plane slides against the pressure plane and a rotational moment is generated.

[008] In some embodiments, the round rotating shaft includes N damping shaft sections, N is greater than or equal to 2, and the damping shaft sections are arranged sequentially at intervals along an axis of the round rotating shaft. Petition 870260066501, dated 06 / 07 / 2026, page 7 / 32 3 / 20

[009] The rotating shaft planes of the damping shaft sections are arranged in a staggered manner.

[0010] The axle sleeve number is the same as the damping shaft section number, and each of at least one axle sleeve encloses a corresponding damping shaft section.

[0011] In some embodiments, along one direction of the axis of the round rotating shaft, the plane of the rotating axis of the damping shaft section is spirally distributed along the axis of the round rotating shaft.

[0012] In some embodiments, along a direction of the axis of the round rotating shaft, with a horizontal plane through the shaft as a reference face, an angle of inclination of the plane of the rotating shaft of the damping shaft section relative to the reference face is gradually increased or decreased.

[0013] In some embodiments, along a direction of the round rotating axis, an area of ​​the plane of the rotating axis of the damping shaft section is gradually increased or decreased.

[0014] In some embodiments, the rotary hinge mechanism also includes a locking joint.

[0015] The locking joint is fixed to the round rotating shaft.

[0016] A locating groove is provided on the outer wall of the fastening joint.

[0017] A limiting assembly is additionally arranged in the seat body, and the limiting assembly pushes elastically against an outer wall of the fixing joint and is secured to the locating groove when the fixing joint rotates to a predefined angle.

[0018] In some embodiments, the limiting assembly includes an elastic part and a locating collision cord connected to the elastic part, and the elastic part automatically actuates the locating collision cord to push elastically against the ex wall. Petition 870260066501, dated 06 / 07 / 2026, page 8 / 32 4 / 20 of the locking fastening joint.

[0019] The locating collision cord slides in the locating groove when the clamping joint rotates to the preset angle with the round rotating axis.

[0020] In some embodiments, the limiting assembly includes a limiting blade; and the limiting blade includes a fixed part and an elastic support part formed by the bending and extension of the fixed part, the fixed part is fixedly connected to the seat body, and the elastic support part pushes elastically against the outer wall of the fixing joint.

[0021] The elastic fastening part slides into the locating groove when the fastening joint rotates to the preset angle with the round rotating axis.

[0022] In some embodiments, a limiting protrusion is arranged at one end, connected to the seat body, of the round rotating shaft; and a stop protrusion is arranged on the seat body.

[0023] When the round rotating shaft turns to a predefined angle, the limiting protrusion pushes the stop protrusion to prevent the round rotating shaft from turning any further.

[0024] To solve the above problem, in another aspect of the present invention, a vehicle-mounted roof screen is provided, which is disposed on the roof of a vehicle, the roof screen includes a screen base, a display screen and a rotary hinge mechanism, the screen base is fixed to the roof, the display screen is connected to the screen base in a rotary opening and closing manner, and the rotary hinge mechanism is the rotary hinge mechanism described above.

[0025] The seat body is fixedly connected to one of the screen bases and the display screen, and the round rotating shaft is fixedly connected to the other screen base and the display screen. Petition 870260066501, dated 06 / 07 / 2026, page 9 / 32 5 / 20

[0026] The present invention has the beneficial effects that, for the rotary hinge mechanism and the vehicle-mounted roof screen provided by the present invention, the rotary hinge mechanism includes the seat body and the round rotary shaft, the damping element is disposed in the seat body, the damping element includes at least one shaft sleeve, a pressure plane is disposed on the inner wall of a through hole of each of at least one shaft sleeve, the round rotary shaft includes at least one damping shaft section, a rotary shaft plane is disposed on the circumferential face of each of at least one damping shaft section, and each of at least one damping shaft section is rotatably placed in the through hole of the corresponding shaft sleeve.Compared with an existing hinge structure, for the rotary hinge mechanism provided by the present invention, when the round rotary shaft rotates, the plane of the rotary shaft in each of at least one section of the damping shaft pushes against the pressure plane in the corresponding shaft sleeve in a sliding manner, so that a variable rotational moment is generated between the contact planes of each of at least one section of the damping shaft and the corresponding shaft sleeve, then a change in rotational moment at various stages of the rotary hinge mechanism is achieved, a better rotary damping texture can be obtained, and a user's experience is obviously improved when applied to a manual vehicle-mounted ceiling screen.

[0027] Furthermore, the rotary hinge mechanism provided by the present invention is simple in structure, low in production and purchase costs, and has a low failure rate in use. After being applied to the manually operated roof screen mounted on a vehicle, the cost of the roof screen is obviously reduced, while simultaneously improving the user experience. Petition 870260066501, dated 06 / 07 / 2026, page 10 / 32 6 / 20 is guaranteed, so it is suitable for widespread use in vehicles of all levels. Brief Description of the Drawings

[0028] To describe the technical solutions in the embodiments of the present invention more clearly, the drawings necessary for use in descriptions of the embodiments will simply be introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and other drawings can be obtained by those with ordinary skill in the art according to the drawings without creative work.

[0029] Figure 1 illustrates a general schematic structure diagram in a sectional view of a rotary hinge mechanism of the present invention, and the rotary hinge mechanism includes a seat body, a round rotating shaft and a damping element.

[0030] Figure 2 illustrates a general schematic structure diagram in a three-dimensional view of a rotary hinge mechanism of the present invention.

[0031] Figure 3 illustrates a schematic structure diagram after a damping element in Figure 1 has been unfolded.

[0032] Figure 4 illustrates a schematic diagram of the structure of a round rotating shaft in Figure 1.

[0033] Figure 5 illustrates a schematic diagram of the mounting structure in a three-dimensional view of a round rotating shaft and a damping element in Figure 1.

[0034] Figure 6 illustrates a schematic structure diagram in a front view of the assembly of a round rotating shaft and a damping element in Figure 1.

[0035] Figure 7 illustrates a schematic structure diagram in a sectional view of a round rotating shaft in Figure 1. Petition 870260066501, dated 06 / 07 / 2026, page 11 / 32 7 / 20

[0036] Figure 8 illustrates a schematic structure diagram in a sectional view of a round rotating shaft and a damping element in Figure 1.

[0037] Figure 9 illustrates a partial schematic structure diagram in a cross-sectional view of one end of Figure 2.

[0038] Figure 10 illustrates a partial schematic structure diagram in a cross-sectional view of the other end of Figure 2.

[0039] Figure 11 illustrates a schematic structure diagram in an exploded view of a vehicle-mounted roof screen of the present invention.

[0040] 100. Rotary hinge mechanism, 101. Mounting plate, 10. Shaft, 20. Reference face, 1. Seat body, 11. Accommodation cavity, 12. Mounting groove, 13. Stop protrusion, 2. Round rotary shaft, 21. Damping shaft section, 211. Rotary shaft plane, 22. Initial shaft section, 23. Limiting protrusion, 3. Damping element, 30. Elastic steel plate, 301. Groove, 31. Shaft sleeve, 311. Pressure plane, 32. Initial shaft sleeve, 4. Locking touch joint, 41. Locating groove, 411. First locating groove, 412. Second locating groove, 5. Locating collision bead structure, 51. Pin, 52. Elastic part, 53. Location collision cord, 6. Limiting blade, 61. Fixed part, 62. Elastic fastening part, 7. Screen base, 71. Base fastening plate, 72. Decorative inner plate, 8. Display screen and 9. Screen locking mechanism. Detailed description of the modalities

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with the drawings in the embodiments of the present invention. It is evident that the embodiments described are not all, but part of the embodiments of the present invention. All other embodiments obtained by Petition 870260066501, dated 06 / 07 / 2026, page 12 / 32 8 / 20 Those with ordinary skill in the art based on the modalities of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0042] Referring to Figures 1-6, in one aspect of the present invention, a rotary hinge mechanism 100 is provided, the rotary hinge mechanism 100 includes a seat body 1 and a round rotary shaft 2, the seat body 1 has an accommodation cavity 11 penetrating through its body, and a damping element 3 is fixedly connected in the accommodation cavity 11.

[0043] The damping element 3 includes at least one shaft sleeve 31, each of at least one shaft sleeve 31 includes a through hole (not shown), a pressure plane 311 is disposed on the inner wall of the through hole, and a distance between the pressure plane 311 and the shaft 10 of the through hole is less than half an inner diameter of the through hole, so that the pressure plane 311 forms a flat structure that projects inward toward an inner side of the through hole relative to an arc-shaped inner wall of the through hole.

[0044] The round rotating shaft 2 is of a cylindrical structure and is connected coaxially and rotationally to the shaft sleeve 31 of the damping element 3, along a direction of the shaft 10. The round rotating shaft 2 includes at least one damping shaft section 21. A rotating shaft plane 211 is disposed on a circumferential face of each of at least one damping shaft section 21, and a distance between the rotating shaft plane 211 and the shaft 10 of the round rotating shaft 2 is less than a radius of the damping shaft section 21, such that the rotating shaft plane 211 forms a planar structure that projects inward toward an inner side of the damping shaft section 21 relative to a Petition 870260066501, dated 06 / 07 / 2026, page 13 / 32 9 / 20 outer wall in the shape of an arch of the damping shaft section 21.

[0045] The damping shaft section 21 is rotatably placed in the through hole of a corresponding shaft sleeve 31, and the damping shaft section 21 rotates until the rotating shaft plane 211 slides against the pressure plane 311 and a rotational moment is generated.

[0046] Compared with an existing hinge structure, for the rotary hinge mechanism provided by the present invention, when the round rotary shaft 2 rotates, the rotary shaft plane 211 in each of at least one section of the damping shaft 21 pushes against the pressure plane 311 in a corresponding shaft sleeve 31 in a sliding manner, so that a variable rotational moment is generated between the contact planes of each of at least one section of the damping shaft 21 and the corresponding shaft sleeve 31, then a change in rotational moment in several stages of the rotary hinge mechanism 100 is achieved, a better rotary damping texture is brought about and the user experience is obviously improved when applied to a manual vehicle-mounted ceiling screen.

[0047] Furthermore, the rotary hinge mechanism provided by the present invention is simple in structure, low in production and purchase costs, and has a low failure rate in use. After being applied to the manual roof screen mounted on a vehicle, the cost of the roof screen is obviously reduced, while the user experience is guaranteed, so it is suitable for popularization and use in vehicles of all levels.

[0048] Referring to Figures 3, 5 and 8, as a preferred embodiment of the present invention, the damping element 3 is formed by perforating an elastic steel plate 30 and, Petition 870260066501, dated 06 / 07 / 2026, page 14 / 32 10 / 20 then, winding it from one side end to the vicinity of the other side end of the elastic steel plate 30, so that each shaft sleeve 31 of the damping element 3 forms an enveloping spring structure with a groove 301, after actual assembly, one side end of the elastic steel plate 30 is moderately unfolded outwards and deformed into the accommodation cavity 11, and the other side end of the elastic steel plate 30 is fixedly connected to the seat body 1.The round rotating shaft 2 rotates around the shaft 10 relative to the damping element 3 until the plane of the rotating shaft 211 slides against the corresponding pressure plane 311, the shaft sleeve 31 is pushed against the corresponding damping shaft section 21 to generate elastic deformation and be moderately unfolded, so that the round rotating shaft 2 rotates further around the shaft 10, and a variable rotational moment is generated between the contact planes.

[0049] It should be noted that the embodiment is only a preferred embodiment of the damping element 3 of the present invention and is not intended to limit the present invention and, in some other embodiments, the damping element 3 is designed in other suitable structures.

[0050] In a specific embodiment of the present invention, the round rotating shaft 2 includes two damping shaft sections 21, the two damping shaft sections 21 are arranged sequentially at intervals along the axis 10 of the round rotating shaft 2, and the rotating shaft planes 211 of the two damping shaft sections 21 are arranged in a staggered manner.

[0051] A shaft sleeve number 31 is also two, each of the two shaft sleeves 31 encloses a corresponding damping shaft section 21, and the pressure plane 311 in each of the two shaft sleeves 31 is preferably arranged on the same side of Petition 870260066501, dated 06 / 07 / 2026, page 15 / 32 11 / 20 axis 10. As the angle of the round rotary axis 2 rotating around axis 10 increases, the rotary axis planes 211 of the two damping axis sections 21 are pushed against the corresponding pressure plane 311 in a sequentially sliding manner, so that a rotational moment between each damping axis section 21 and the corresponding axis sleeve 31 is generated step by step and superimposed step by step, then the multi-stage change damping texture is generated, and a user's experience is enhanced.

[0052] In the embodiment, where two shaft sleeves 31 enclose two damping shaft sections 21, it is taken as an example for illustration; in some other embodiments, the numbers of the damping shaft section 21 and the corresponding shaft sleeve 31 are greater than two; the more numbers defined, the greater the number of moment variation stages of the rotary hinge mechanism 100, the smoother the transition between each moment stage, and the adjustment is made according to the requirements in the actual manufacture.

[0053] Referring to Figures 4-6, in a specific embodiment of the present invention, along the axis direction 10 of the round rotary shaft 2, the rotary shaft plane 211 of each of at least one section of the damping shaft 21 is spirally distributed along the axis 10 of the round rotary shaft 2, such structural design allows the rotary shaft plane 211 between each section of the damping shaft 21 to change step by step, thus ensuring that the rotational moment between each of at least one section of the damping shaft 21 is generated step by step and changes, and the multi-stage changing damping texture is brought about.

[0054] As a preferred embodiment of the present invention, the plane of the rotating shaft 211 is formed by cutting an arc-shaped outer wall of the round rotating shaft 2 along the direction Petition 870260066501, dated 06 / 07 / 2026, page 16 / 32 12 / 20 axis 10, along the direction of axis 10, the plane of the rotating axis 211 begins at the corresponding damping axis section 21 and extends to a final stage of the damping axis section 21 penetrating through the round rotating axis 2, the plane of the rotating axis 211 between each damping axis section 21 is spirally distributed along axis 10, and the plane of the rotating axis 211 between two adjacent damping axis sections 21 shares part of the edge of the lateral intersection end. This structural design is convenient for processing the round rotating axis 2 and reduces the production and manufacturing costs of the rotating hinge mechanism 100. The plane of the rotating axis 211 shares part of the edge of the lateral intersection end, so a smooth transition and change between two adjacent stages of rotational moments is achieved, and the damping texture of the rotating hinge mechanism 100 is further promoted.

[0055] As shown in Figures 4-7, in a specific embodiment of the present invention, along the axis direction 10 of the round rotary shaft 2, with a horizontal plane through the axis 10 as a reference face 20, an angle of inclination of the rotary shaft plane 211 of each of at least one section of the damping shaft 21 relative to the reference face is gradually increased or decreased. Such a structural design allows the rotary shaft plane 211 of each of at least one section of the damping shaft 21 to change step by step in a gradient mode, so that a rotational moment between each section of the damping shaft 21 and the corresponding shaft sleeve 31 is generated step by step and changes regularly in a gradient mode, the smoothness of the generation and change of the multi-stage rotary damping is ensured, and the texture of the damping is further enhanced.

[0056] Referring to Figures 4 and 7, in a specific modality Petition 870260066501, dated 06 / 07 / 2026, p. 17 / 32 13 / 20 of the present invention, along the direction of the axis 10 of the round rotating shaft 2, an area of ​​the plane of the rotating shaft 211 of each of at least one section of the damping shaft 21 is gradually increased or decreased. The plane of the rotating shaft 211 is formed by cutting a circumferential face of the round rotating shaft 2; the larger the area, the greater the contact face with the pressure plane 311 of the corresponding shaft sleeve 31, and a greater sliding friction damping generated from the plane of the rotating shaft 211 and the pressure plane 311, combined with the rotational moment generated when the section of the damping shaft 21 pushes against the shaft sleeve 31, the rotary damping between each of at least one section of the damping shaft 21 and the corresponding shaft sleeve 31 is in obvious change in a gradient mode, and thus the texture of the step-by-step change of the multi-state rotary damping of the rotary hinge mechanism 100 is ensured.

[0057] Referring to Figures 3-8, in a specific embodiment of the present invention, the round rotating shaft 2 further includes an initial shaft section 22 not provided with a rotating shaft plane 211, and each of at least one damping shaft section 21 begins at the initial shaft section 22 and is arranged sequentially along the shaft direction 10. Correspondingly, the damping element 3 further includes an initial shaft sleeve 32 not provided with a pressure plane 311, and each shaft sleeve 31 begins at the initial shaft sleeve 32 and is arranged sequentially along the shaft direction 10. When the round rotating shaft 2 is rotatably placed in the damping element 3, the initial shaft sleeve 32 elastically encloses the initial shaft section 22, and each shaft sleeve 31 sequentially encloses the corresponding damping shaft section 21.

[0058] To facilitate the explanation of the multi-state damping change rule of the rotary hinge mechanism 100 of the pre Petition 870260066501, dated 06 / 07 / 2026, page 18 / 32 14 / 20 sense invention, in the following description, the initial shaft section 22-initial shaft sleeve 32 is defined as a primary damping area section A, and the subsequent damping shaft section 21-shaft sleeve 31 are sequentially defined as a secondary damping area section B and a tertiary damping area section C.

[0059] The rotary hinge mechanism 100 in the embodiment has three stages of damping change area sections, so the step-by-step generation and step-by-step overlapping of three stages of rotary damping of the hinge mechanism are performed, for the primary damping area section A, throughout the rotation process of the round rotary shaft 2, an arc-shaped outer wall of the initial shaft section 22 is in sliding contact with an arc-shaped inner wall of the initial shaft sleeve 32, and the arc-shaped outer wall of the initial shaft section 22 and the arc-shaped inner wall of the initial shaft sleeve 32 have friction to generate continuous and stable rotational moment M1.

[0060] As shown in Figure 8, the secondary damping area section B is in a rotating front section of the round rotating shaft 2 (within the rotation angle α, the plane of the rotating shaft 211 rotates corresponding to the pressure plane 311 until one side of the plane of the rotating shaft 211 pushes against the pressure plane 311), the outer arc-shaped wall of the damping shaft section 21 is in frictional contact with an inner arc-shaped wall of the corresponding shaft sleeve 31, the plane of the rotating shaft 211 of the damping shaft section 21 is not in contact with the pressure plane 311 of the corresponding shaft sleeve 31, and in the process, a rotational moment generated by the secondary damping area section B is M2. When the rotation angle of the round rotating shaft 2 is greater than α, as the outer arc-shaped wall Petition 870260066501, dated 06 / 07 / 2026, page 19 / 32 15 / 20 of the damping shaft section 21 is locally cut and forms the corresponding rotating shaft plane 211, the corresponding area of ​​the inner wall of the through hole of the corresponding shaft sleeve 31 is flattened to form the corresponding pressure plane 311, in the process where the round rotating shaft 2 rotates clockwise around the shaft 10 to the angle a, the rotating shaft plane 211 of the damping shaft section 21 pushes against the corresponding pressure plane 311 in a sliding mode, a frictional moment is generated between the two planes, the rotational moment is increased to M3 and M3>M2.

[0061] The section of the tertiary damping area C is in the rotating front section of the round rotating shaft 2, the outer arc-shaped wall of the damping shaft section 21 is in frictional contact with the inner arc-shaped wall of the corresponding shaft sleeve 31, the structure is like that of the secondary damping area section B, and the generated rotational moment is M4. The tertiary damping area section C is in a rotating rear section of the round rotating shaft 2, the rotating shaft plane 211 of the tertiary damping area section C and the rotating shaft plane 211 of the secondary damping area section B are arranged in a staggered manner, in the process, the rotating shaft plane 211 of the damping shaft section 21 of the tertiary damping area section C pushes against the corresponding pressure plane 311 in a sliding manner, the two planes generate a frictional moment, the rotational moment is increased to M5, and M5>M4.

[0062] To summarize, in the rotation process of the round rotating shaft 2, three stages of rotational moments are sequentially (M1+M2+M4), (M1+M3+M4) and (M1+M3+M5) in ascending order, thus, a step-by-step change in a gradient mode of the rotational moment of each of the three damping area sections of the Petition 870260066501, dated 06 / 07 / 2026, page 20 / 32 The 16 / 20 swivel hinge mechanism is implemented, ensuring a smooth, multi-stage swivel damping increment and significantly improving user comfort.

[0063] Referring to Figures 1-2 and Figure 9, in a specific embodiment of the present invention, the rotary hinge mechanism 100 further includes a locking touch joint 4 and a limiting assembly combined with the locking touch joint 4. The locking touch joint 4 is of a round sheet structure, coaxially fixedly connected to one end of the round rotating shaft 2, exposed from the damping element 3, and rotates around the shaft 10 synchronously with the round rotating shaft 2. A locating groove 41 is disposed in an arc-shaped outer wall of the locking touch joint 4.

[0064] A mounting groove 12 is disposed in the seat body 1, the limiter assembly is placed in the mounting groove 12 and fixedly connected with the seat body 1, the limiter assembly pushes elastically against an outer wall of the locking touch joint 4 and bends into the locating groove 41 when the locking touch joint 4 rotates to a predefined angle, so that the immediate locking sensation is generated to remind the user that the round rotating shaft 2 has rotated into place and, meanwhile, the locking effect of the round rotating shaft 2 is achieved to a certain extent, so that the user's experience is promoted.

[0065] Referring to Figure 9, in a specific embodiment of the present invention, the limiting assembly includes a locating collision bead structure 5, and the locating collision bead structure 5 is mounted in the mounting groove 12 of the seat body 1 in a positionally adjustable manner and by a threaded fastening manner. The locating collision bead structure 5 includes a pin 51 Petition 870260066501, dated 06 / 07 / 2026, page 21 / 32 17 / 20 having an internal cavity and being open at one end, an elastic part 52 (preferably a compression spring) placed in the internal cavity of the pin 51, and a locating collision bead 53 movably connected with the elastic part 52 and located in the opening of the internal cavity of the pin 51. In a normal condition, the elastic part 52 automatically actuates the locating collision bead 53 to push elastically against the outer wall of the locking contact joint 4.

[0066] When the locking touch joint 4 rotates to a predefined angle with the round rotating shaft 2, the locating collision bead 53 of the locating collision bead structure 5 slides in the locating groove 41 to form a resistance to the rotation of the locking touch joint 4, then the locking touch warning of the coaxial round rotating shaft 2 is performed to remind the user that the round rotating shaft 2 has rotated to a locking position and that the opening / closing of the rotating hinge mechanism 100 is in effect.

[0067] Referring to Figures 1, 2 and 9, in a specific embodiment of the present invention, the limiting assembly includes a limiting vane 6, the limiting vane 6 includes a fixed part 61, and an elastic support part 62 is formed by the bending and extension of the fixed part 61, the fixed part 61 is fixedly connected to the seat body 1, and the elastic support part 62 pushes elastically against the outer wall of the locking fastening joint 4.

[0068] When the locking touch joint 4 rotates to a predefined angle with the round rotating shaft 2, the elastic support part 62 of the limiting vane 6 slides in the locating groove 41 to form a resistance to the rotation of the locking touch joint 4 and then the locking touch warning of the coaxial round rotating shaft 2 is performed to remind the user that the shaft is rotating. Petition 870260066501, dated 06 / 07 / 2026, page 22 / 32 18 / 20 round hinge 2 rotated to a locking position and the opening / closing of the 100 rotating hinge mechanism is in effect.

[0069] The limiting assembly of the rotary hinge mechanism 100 is one of the localization collision sphere structures 5 and the limiting vane 6, only if the immediate locking touch of the round rotary shaft 2 can be performed.

[0070] Certainly, the limiting assembly also includes the locating collision ball structure 5 and the limiting paddle 6 at the same time, as shown in Figure 9, the locating groove 41 includes a first locating groove 411 and a second locating groove 412, the locating collision ball structure 5 slides in the first locating groove 411 for quick locking sensation when the round rotating shaft 2 rotates to a minimum / maximum rotation angle, correspondingly, the limiting paddle 6 slides in the second locating groove 412 for quick locking sensation when the round rotating shaft 2 rotates to the minimum / maximum rotation angle, thus, double locking sensation functions for opening and closing at the location of the rotating hinge mechanism 100 are realized, and the user's experience is further enhanced.

[0071] Referring to Figure 10, in a specific embodiment of the present invention, a limiting protrusion 23 is disposed at one end, rotatably connected with the seat body 1, of the round rotating shaft 2 and, correspondingly, a stop protrusion 13 is additionally disposed at the corresponding position of the seat body 1.

[0072] When the round rotating shaft 2 rotates to a predefined maximum opening angle of the rotating hinge mechanism 100, the limiting protrusion 23 pushes against the stop protrusion 13 Petition 870260066501, dated 06 / 07 / 2026, page 23 / 32 19 / 20 to prevent the round rotating shaft 2 from rotating further, in accordance with the design of the limiter assembly above, the location and locking of the maximum opening angle of the rotating hinge mechanism 100 are achieved, excessive opening of the hinge is avoided, so that the reliability of use of the hinge mechanism is guaranteed and the user experience is improved.

[0073] Referring to Figures 1 and 11, to solve the above problem, in another aspect of the present invention, a vehicle-mounted ceiling screen is provided, the ceiling screen includes a screen base 7, a display screen 8, the rotary hinge mechanism 100 described above and a screen locking mechanism 9, the screen base 7 includes a base fixing plate 71 fixed to a roof (not shown in the figure) of a vehicle and an inner decorative plate 72, which are combined in a buckling manner; the display screen 8 is connected to the screen base 7 in a rotary opening and closing manner by means of the rotary hinge mechanism 100 correspondingly disposed in a hinge mounting position 73; and the screen locking mechanism 9 is fixed in the middle of the side, away from the rotary hinge mechanism 100, of the screen base 7.The seat body 1 is fixedly connected to the screen base 7, the round rotating shaft 2 is fixedly connected to the display screen 8 by means of a mounting plate 101 fixedly connected to its end part, and the screen locking mechanism 9 holds and secures the display screen 8 to the screen base 7 to be locked on the side away from the rotating hinge mechanism 100.

[0074] In use, after unlocking the screen locking mechanism 9, a user manually flips the display screen 8, in the process, the display screen 8, through the mounting plate 101, drives the round rotating shaft 2 to rotate around the axis 10 relative to the damping element 3, and generates rotational torque changing in Petition 870260066501, dated 06 / 07 / 2026, page 24 / 32 20 / 20 multiple stages in a gradient mode under the effect of each section of the damping shaft 21 and the corresponding shaft sleeve 31, so that the damping texture in the manual unfolding process of the roof screen is obviously improved, a better user experience is brought, meanwhile, the production and manufacturing costs of the roof screen are reduced, and the popularization and use in vehicles of all levels are facilitated.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent structures or equivalent process transformations carried out using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, are included within the scope of the present invention. Petition 870260066501, dated 06 / 07 / 2026, page 25 / 32

Claims

1 / 4 CLAIMS 1. Rotary hinge mechanism, characterized in that it comprises: a seat body (1), a damping element (3) is disposed in the seat body (1), the damping element (3) comprises at least one shaft sleeve (31), each of at least one shaft sleeve (31) comprises a through hole, and a pressure plane (311) is disposed in an inner wall of the through hole; a round rotary shaft (2), the round rotary shaft (2) comprises at least one damping shaft section (21), and a rotary shaft plane (211) is disposed in a circumferential face of each of at least one damping shaft section (21); the damping shaft section (21) is rotatably placed in a corresponding through hole, and the damping shaft section (21) rotates until the plane of the rotating shaft (211) slides against the pressure plane (311) and a rotational moment is generated.

2. Rotary hinge mechanism according to claim 1, characterized in that the round rotary shaft (2) comprises N damping shaft sections (21), N is greater than or equal to 2, and the damping shaft sections (21) are arranged sequentially at intervals along an axis of the round rotary shaft (2); the rotary shaft planes (211) of the damping shaft sections (21) are arranged in a staggered manner; a shaft sleeve number (31) is the same as a damping shaft section number (21), and each of at least one shaft sleeve (31) encloses a corresponding damping shaft section (21).

3. Rotary hinge mechanism, according to claim 2, characterized in that along a direction of the axis of the round rotary shaft (2), the plane of the rotary shaft (211) of the damping shaft section (21) is spirally distributed along the axis of the round rotary shaft (2).

4. Rotary hinge mechanism, according to any one of claims 2 or 3, characterized in that along a direction of the axis of the round rotary shaft (2), with a horizontal plane through the shaft as a reference face, an angle of inclination of the plane of the rotary shaft (211) of the damping shaft section (21) relative to the reference face is gradually increased or decreased.

5. Rotary hinge mechanism, according to any one of claims 2 or 3, characterized in that along a direction of the round rotary axis (2), an area of ​​the rotary axis plane (211) of the damping shaft section (21) is gradually increased or decreased.

6. Rotary hinge mechanism, according to any one of claims 2 or 3, characterized in that the rotary hinge mechanism further comprises a pressure-fit joint (4); wherein the fastening joint (4) is fixed to the round rotary shaft (2); a locating groove (41) is disposed in an outer wall of the fastening joint (4); a limiting assembly is additionally disposed in the seat body (1), and the limiting assembly pushes elastically against the outer wall of the fastening joint (4) and is bent into the locating groove (41) when the fastening joint (4) rotates to a predefined angle. Petition 870240108365, dated 19 / 12 / 2024, page 63 / 75 3 / 4 7. Rotary hinge mechanism, according to claim 6, characterized in that the limiting assembly comprises an elastic part (52) and a locating collision bead (53) connected with the elastic part (52), and the elastic part automatically actuates the locating collision bead (53) to push elastically against the outer wall of the locking fastening joint (4); the locating collision bead (53) slides in the locating groove (41) when the fastening joint (4) rotates to the predefined angle with the round rotating axis (2).

8. Rotary hinge mechanism, according to claim 6, characterized in that the limiting assembly comprises a limiting vane (6); the limiting vane (6) comprises a fixed part (61), wherein an elastic support part (62) is formed by the bending and extension of the fixed part (61), the fixed part (61) is fixedly connected to the seat body (1), and the elastic support part (62) pushes elastically against the outer wall of the locking fastening joint (4); the elastic support part (62) slides in the locating groove (41) when the fastening joint (4) rotates to the predefined angle with the round rotating axis (2).

9. Rotary hinge mechanism, according to any one of claims 2 or 3, characterized in that a limiting protrusion (23) is disposed at one end, connected to the seat body (1), of the round rotary shaft (2); a stop (13) is disposed in the seat body (1); when the round rotary shaft (2) rotates to a predefined angle, the limiting protrusion (23) pushes against the stop protrusion (13) to prevent the round rotary shaft (2) from rotating further. Petition 870240108365, dated 12 / 19 / 2024, pp. 64 / 75 4 / 4 10. A vehicle-mounted ceiling screen, disposed on the roof of a vehicle, characterized in that it comprises: a screen base (7), the screen base (7) being fixed to the roof; a display screen (8); a rotary hinge mechanism, wherein the display screen (8) is connected to the screen base (7) in a rotary manner for opening and closing by means of the rotary hinge mechanism, and the rotary hinge mechanism is the rotary hinge mechanism as defined in any one of claims 1 to 9; wherein the seat body (1) is fixedly connected to one of the screen bases (7) and the display screen (8), and the round rotating shaft (2) is fixedly connected to another screen base (7) and the display screen (8). Petition 870240108365, dated 12 / 19 / 2024, pp. 65 / 75

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