Hinge tri-segment folding structure

Abstract

The utility model relates to a hinge three -segment type folding structure, include: sectional switching subassembly, including support plate, damping part, first limit wheel and first locating wheel, second limit wheel and second locating wheel and stop block, one damping part is elastically clamped between first limit wheel and first locating wheel, and the other damping part is elastically clamped between second limit wheel and second locating wheel, coaxial connection sectional switching subassembly one side's first pivot subassembly, and coaxial connection sectional switching subassembly the other side's second pivot subassembly, above-mentioned hinge three -segment type folding structure, the structure is exquisite, convenient to use, through sectional switching subassembly cooperation first pivot, second pivot alternate leading rotation, combine first limit wheel, second limit wheel, first locating wheel, second locating wheel and the accurate cooperation of two damping parts, solved the lightning section difference problem when traditional double -shaft two -segment type structure 180 degrees to open, realize back shell coplanar flattening, promote product appearance integrity and high -end texture.

Description

Technical Field

[0001] This utility model relates to the field of hinge folding technology, and in particular to a three-section hinge folding structure. Background Technology

[0002] Currently, the practical application of foldable electronic devices (such as foldable screen phones and laptops) heavily relies on the reliability of their hinge components. Mainstream hinges employ a dual-axis, two-stage switching structure, using two rotation axes and transmission mechanisms such as cams and gears to achieve phased movement during the opening and closing process: the first stage involves rotation around a first axis, and the second stage switches to rotation around the second axis. This design effectively reduces screen stress and alleviates crease problems by increasing the bending radius, and also supports multi-angle hovering functionality.

[0003] However, this structure has an inherent flaw: when the device is unfolded to 180 degrees, due to the geometric constraints of the dual-axis motion and the thickness of the hinge itself, the back of the device cannot be physically flattened in the hinge area. Instead, it forms a continuous "Z" shape or lightning bolt symbol-shaped step (commonly known as lightning bolt step) with a central bulge and lower sides. This shape causes the back shell to be non-coplanar, destroying the product's overall appearance and high-end feel, and creating a sense of visual and tactile dissonance. Utility Model Content

[0004] Based on this, the present invention provides a hinged three-section folding structure, which is ingenious and easy to use. By using a segmented switching component in conjunction with the first and second rotating shafts to alternately dominate the rotation, and combined with the precise cooperation of the first limiting wheel, the second limiting wheel, the first positioning wheel, the second positioning wheel and the two damping components, the problem of sudden step difference when the traditional dual-axis two-section structure unfolds 180 degrees is solved, and the back shell is flattened to the same plane, improving the product's appearance integration and high-end texture.

[0005] To achieve the objectives of this utility model, the following technical solution is adopted: A hinged three-section folding structure, comprising: The segmented switching assembly includes three support plates arranged in parallel intervals, damping components slidably mounted between two adjacent support plates, a first limiting wheel and a first positioning wheel corresponding to opposite sides of one damping component, a second limiting wheel and a second positioning wheel corresponding to opposite sides of another damping component, and a stop block protruding from one end of one support plate; the stop block is used to embed and abut against the second positioning wheel; the outer peripheral surface of the first limiting wheel is recessed inward to form a first limiting concave surface, and the outer peripheral surface of the second limiting wheel is recessed inward to form a second limiting concave surface; the outer peripheral surface of the first positioning wheel is recessed inward to form two adjacent first positioning concave surfaces, and the outer peripheral surface of the second positioning wheel is recessed inward to form a second positioning concave surface; one damping component is elastically clamped between the first limiting wheel and the first positioning wheel, and another damping component is elastically clamped between the second limiting wheel and the second positioning wheel; the damping component elastically abuts against the first limiting concave surface, the second limiting concave surface, the first positioning concave surface, and the second positioning concave surface to provide rotational damping; A first hinge assembly on one side of the coaxial connection segment switching component, the first hinge assembly being used to connect to the device screen side; and A second rotating shaft assembly is coaxially connected to the other side of the segmented switching assembly. The second rotating shaft assembly is used to connect to the equipment carrier side. 0-90 degree range: the first rotating shaft assembly rotates while the second rotating shaft assembly remains stationary; 90-180 degree range: the second rotating shaft assembly rotates while the first rotating shaft assembly remains stationary; 180-360 degree range: the first rotating shaft assembly rotates again while the second rotating shaft assembly remains stationary; by alternating segmented rotation, the back segment difference during 180-degree unfolding is eliminated.

[0006] The aforementioned three-section hinge folding structure is ingenious and easy to use. Through the segment switching component, the first and second rotating shafts alternately dominate the rotation. Combined with the precise cooperation of the first and second limiting wheels, the first and second positioning wheels, the second positioning wheels, and the two damping components, it solves the problem of sudden step difference when the traditional dual-axis two-section structure unfolds 180 degrees. It achieves coplanar flattening of the back shell, improving the product's appearance, integrity, and high-end texture.

[0007] In one embodiment, the first limiting wheel and the second limiting wheel are coaxially arranged, and the first positioning wheel and the second positioning wheel are coaxially arranged.

[0008] In one embodiment, the outer diameters of the first limiting wheel, the second limiting wheel, the first positioning wheel, and the second positioning wheel are all equal.

[0009] In one embodiment, each support plate has a groove in the middle; the damping element includes a sliding seat, a spring embedded in one side of the sliding seat, a spring-loaded pin that abuts the spring, and protrusions protruding from the top and bottom surfaces of the sliding seat respectively; the protrusions are fitted into the groove.

[0010] In one embodiment, the sliding seat is used to abut against the first limiting wheel and the second limiting wheel, and the pop-out pin is used to extend beyond the side of the sliding seat and abut against the first positioning wheel and the second positioning wheel.

[0011] In one embodiment, a stop groove is provided on the periphery of the end of the second positioning wheel away from the first positioning wheel; the stop block is fitted into the stop groove.

[0012] In one embodiment, the first rotating shaft assembly includes a first rotating shaft, a first spring plate coaxially sleeved on the first rotating shaft, and a first self-locking nut screwed to the end of the first rotating shaft; the first rotating shaft passes through three support plates, and the first limiting wheel, the second limiting wheel, and the first spring plate located between the three support plates are screwed to the first self-locking nut; the first rotating shaft rotates synchronously with the first limiting wheel and the second limiting wheel on the same axis.

[0013] In one embodiment, the second rotating shaft assembly includes a second rotating shaft, a second spring plate coaxially sleeved on the second rotating shaft, and a second self-locking nut screwed to the end of the second rotating shaft; the second rotating shaft passes through three support plates, and the second self-locking nut is screwed onto the first positioning wheel, the second positioning wheel, and the second spring plate located between the three support plates; the second rotating shaft rotates synchronously with the first positioning wheel and the second positioning wheel. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a hinge-type three-section folding structure according to an embodiment of the present invention. Figure 2 for Figure 1 A three-dimensional schematic diagram of the hinged three-section folding structure from another perspective; Figure 3 for Figure 1 An exploded view of the three-segment hinge folding structure shown. Figure 4 for Figure 3 An exploded view of the segmented switching component in the three-segment hinge folding structure shown. Figure 5 for Figure 4 A three-dimensional schematic diagram from another perspective of the segmented switching component in the three-segment hinge folding structure shown; Figure 6 for Figure 5 An exploded view of the damping component in the three-section hinge folding structure shown. Figure 7 for Figure 1 A three-dimensional schematic diagram of the segment switching component in the 0-degree state of the three-segment hinge folding structure shown. Figure 8 for Figure 7 A three-dimensional schematic diagram from another perspective showing the segment switching component in the 0-degree state of the three-segment hinge folding structure. Figure 9 for Figure 1 A three-dimensional schematic diagram of the segment switching component in a 90-degree position in the three-segment hinge folding structure shown. Figure 10 for Figure 9 A three-dimensional schematic diagram from another perspective showing the segment switching component in a 90-degree state in the three-segment hinge folding structure. Figure 11 for Figure 1 A three-dimensional schematic diagram of the segment switching component in a 180-degree state in the three-segment hinge folding structure shown. Figure 12 for Figure 11 A three-dimensional schematic diagram from another perspective of the segment switching component in the 180-degree state of the three-segment hinge folding structure shown. Figure 13 for Figure 1 A three-dimensional schematic diagram of the segment switching component in a 360-degree state in the three-segment hinge folding structure shown. Figure 14 for Figure 13 The three-dimensional schematic diagram of the segment switching component in the 360-degree state of the hinged three-segment folding structure is shown from another perspective.

[0015] Attached image annotations: 10-Segment switching component, 11-Support plate, 12-Damping component, 121-Sliding seat, 122-Spring, 123-Ejector pin, 124-Protrusion, 13-First limiting wheel, 131-First limiting concave surface, 132-First protruding ridge, 14-First positioning wheel, 141-First positioning concave surface, 142-First stop ridge, 15-Second limiting wheel, 151-Second limiting concave surface, 152-Second protruding ridge, 16-Second positioning wheel, 160-Stop groove, 161-Second positioning concave surface, 162-Second stop ridge, 17-Stop block, 18-Slide groove; 20-First rotating shaft assembly, 21-First rotating shaft, 22-First spring plate, 23-First self-locking nut; 30 - Second rotating shaft assembly, 31 - Second rotating shaft, 32 - Second spring plate, 33 - Second self-locking nut. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0017] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] The specific implementation method is as follows: Please see Figures 1 to 14 The present invention provides a three-section hinge folding structure, comprising a segment switching component 10, a first pivot assembly 20 coaxially connected to one side of the segment switching component 10, and a second pivot assembly 30 coaxially connected to the other side of the segment switching component 10. The first pivot assembly 20 is used to connect to the device screen side, and the second pivot assembly 30 is used to connect to the device carrier side (e.g., the casing).

[0020] The segmented switching assembly 10 includes three support plates 11 arranged in parallel intervals, damping members 12 slidably installed between two adjacent support plates 11, a first limiting wheel 13 and a first positioning wheel 14 correspondingly arranged on opposite sides of one damping member 12, a second limiting wheel 15 and a second positioning wheel 16 correspondingly arranged on opposite sides of the other damping member 12, and a stop block 17 protruding from one end of one support plate 11; the stop block 17 is used to embed and abut against the second positioning wheel 16 to limit the rotation angle range of the second positioning wheel 16.

[0021] The first limiting wheel 13 and the second limiting wheel 15 are coaxially arranged, as are the first positioning wheel 14 and the second positioning wheel 16. The outer diameters of the first limiting wheel 13, the second limiting wheel 15, the first positioning wheel 14, and the second positioning wheel 16 are all equal to ensure compatibility during transmission.

[0022] Each support plate 11 has a groove 18 in the middle, which is used to cooperate with the damping member 12, so that the damping member 12 can slide along the length of the groove 18. One damping member 12 is elastically clamped between the first limiting wheel 13 and the first positioning wheel 14, and the other damping member 12 is elastically clamped between the second limiting wheel 15 and the second positioning wheel 16, providing damping for the rotation of the first limiting wheel 13, the second limiting wheel 15, the first positioning wheel 14 and the second positioning wheel 16, so as to facilitate the positioning of the opening and closing angle.

[0023] In this embodiment, as Figures 4 to 6As shown, the damping element 12 includes a sliding seat 121, a spring 122 embedded in one side of the sliding seat 121, a pop-out pin 123 abutting against the spring 122, and protrusions 124 respectively protruding from the top and bottom surfaces of the sliding seat 121; the protrusions 124 are matched and embedded in the sliding groove 18 to realize the sliding connection between the damping element 12 and the support plate 11. The sliding seat 121 is used to abut against the first limiting wheel 13 and the second limiting wheel 15, and the pop-out pin 123 is used to extend beyond the side of the sliding seat 121 and abut against the first positioning wheel 14 and the second positioning wheel 16.

[0024] The outer peripheral surface of the first limiting wheel 13 is recessed inward to form a first limiting concave surface 131, which is used to match and abut one end of the sliding seat 121. Due to the difference in wheel body thickness, the connection points between the opposite sides of the first limiting concave surface 131 and the outer peripheral surface of the first limiting wheel 13 respectively form first protruding ridges 132, that is, the first limiting concave surface 131 is located between the two first protruding ridges 132, so that the space between the two first protruding ridges 132 is used to accommodate the sliding seat 121.

[0025] The outer peripheral surface of the second limiting wheel 15 is recessed inward to form a second limiting concave surface 151, which is used to match and abut one end of the sliding seat 121. Due to the difference in wheel body thickness, the two opposite sides of the second limiting concave surface 151 are respectively connected to the outer peripheral surface of the second limiting wheel 15 to form second protruding ridges 152. That is, the second limiting concave surface 151 is located between the two second protruding ridges 152, so that the space between the two second protruding ridges 152 is used to accommodate the sliding seat 121.

[0026] Two adjacent first positioning concave surfaces 141 are formed by inwardly recessing on the outer peripheral surface of the first positioning wheel 14. The first positioning concave surfaces 141 are used to mate and abut against the ejector pin 123. Due to the difference in wheel body thickness, the connection points between the opposite sides of the first positioning concave surfaces 141 and the outer peripheral surface of the first positioning wheel 14 respectively form first retaining ridges 142. That is, the first positioning concave surfaces 141 are located between two adjacent first retaining ridges 142, so that the space between two adjacent first retaining ridges 142 is used to accommodate the ejector pin 123.

[0027] The outer peripheral surface of the second positioning wheel 16 is recessed inward to form a second positioning concave surface 161, which is used to match and abut the ejector pin 123. Due to the difference in wheel body thickness, the connection points between the opposite sides of the second positioning concave surface 161 and the outer peripheral surface of the second positioning wheel 16 respectively form second retaining ridges 162, that is, the second positioning concave surface 161 is located between the two second retaining ridges 162, so that the space between the two second retaining ridges 162 is used to accommodate the ejector pin 123.

[0028] Furthermore, such as Figure 4As shown, a stop groove 160 is provided on the periphery of the end of the second positioning wheel 16 away from the first positioning wheel 14. The stop groove 160 is adjacent to the second positioning concave surface 161. The stop block 17 is matched and embedded in the stop groove 160. Under the cooperative action of the stop block 17 and the stop groove 160, the rotation angle range of the second positioning wheel 16 is limited to 90 degrees, that is, the second positioning wheel 16 can only rotate a maximum of 90 degrees.

[0029] The first rotating shaft assembly 20 includes a first rotating shaft 21, a first spring plate 22 coaxially sleeved on the first rotating shaft 21, and a first self-locking nut 23 screwed to the end of the first rotating shaft 21. The first rotating shaft 21 passes through three support plates 11, a first limiting wheel 13, a second limiting wheel 15 located between the three support plates 11, and the first spring plate 22, and is then screwed with the first self-locking nut 23, thereby realizing the assembly of the first rotating shaft assembly 20 and the segmented switching assembly 10. The first rotating shaft 21 rotates coaxially and synchronously with the first limiting wheel 13 and the second limiting wheel 15.

[0030] The second rotating shaft assembly 30 includes a second rotating shaft 31, a second spring plate 32 coaxially sleeved on the second rotating shaft 31, and a second self-locking nut 33 screwed to the end of the second rotating shaft 31. The second rotating shaft 31 passes through three support plates 11, a first positioning wheel 14, a second positioning wheel 16 located between the three support plates 11, and the second spring plate 32, and is then screwed with the second self-locking nut 33, thus assembling the second rotating shaft assembly 30 with the segmented switching assembly 10. The second rotating shaft 31 rotates coaxially and synchronously with the first positioning wheel 14 and the second positioning wheel 16.

[0031] like Figure 7 and Figure 8 The image shown is a three-dimensional schematic diagram of the hinge of this utility model in the 0-degree open / closed state (i.e., fully closed state). For ease of understanding, [the image is shown in the original text]. Figure 7 The orientations are described as initial reference positions. The first limiting concave surface 131 is located at the 12 o'clock position of the first limiting wheel 13, and the second limiting concave surface 151 extends from the 12 o'clock position of the second limiting wheel 15 to the 3 o'clock position of the second limiting wheel 15. The first positioning concave surface 141 is located at the 9 o'clock and 12 o'clock positions of the first positioning wheel 14, and the second positioning concave surface 161 is located at the 12 o'clock position of the second positioning wheel 16. At this time, the two damping elements 12 are misaligned.

[0032] The unfolding process of the hinge of this utility model is divided into three stages, with the specific motion logic as follows: When unfolding from 0 degrees to 90 degrees, the first rotating shaft 21 rotates while the second rotating shaft 31 remains stationary; when unfolding from 90 degrees to 180 degrees, the second rotating shaft 31 rotates while the first rotating shaft 21 remains stationary; when unfolding from 180 degrees to 360 degrees, the first rotating shaft 21 rotates again while the second rotating shaft 31 remains stationary. The specific motion process of each stage is analyzed below: When the hinge extends from 0 degrees to 90 degrees (by...) Figure 7 State transition to Figure 9 (state), the first rotating shaft 21 rotates 90 degrees clockwise along its axis (e.g. Figure 7 (As indicated by the arrow) The second rotating shaft 31 remains stationary. During this process, under the elastic action of the spring 122, the lower sliding seat 121 smoothly slides along the outer peripheral surface of the first limiting wheel 13 and embeds itself into the interior of the first limiting recess 131; the upper sliding seat 121 smoothly slides from one side to the other side inside the second limiting recess 151. The lower sliding seat 121 abuts against the first protruding ridge 132, and the upper sliding seat 121 abuts against the second protruding ridge 152. The first and second protruding ridges 132 together generate superimposed damping on the rotation of the first rotating shaft 21. The superimposed damping is greater than the damping effect of the two pop-out pins 123 on the first positioning wheel 14 and the second positioning wheel 16 (equivalent to, on the side of the first rotating shaft 21, the rotation of the first rotating shaft 21 is subject to the double resistance of the first protrusion 132 and the second protrusion 152, while on the side of the second rotating shaft 31, only the lower pop-out pin 123 needs to overcome the resistance of the first stop 142, and the upper pop-out pin 123 is not subject to resistance). Therefore, when unfolded from 90 degrees to 180 degrees, the first rotating shaft 21 remains stationary, and the second rotating shaft 31 rotates 90 degrees counterclockwise along its axis (e.g., Figure 9 (As indicated by the arrow). When the hinge is extended to 90 degrees, the two damping elements 12 switch from a staggered setting to a side-by-side corresponding setting.

[0033] When the hinge extends from 90 degrees to 180 degrees (by...) Figure 9 State transition to Figure 11 In the state of rotation, the first shaft 21 remains stationary, while the second shaft 31 rotates 90 degrees counterclockwise along its axis (e.g., ...). Figure 9 (As indicated by the arrow). During this process, under the elastic action of the spring 122, the two sliding seats 121 remain stationary. The lower pop-out pin 123 slides out from the inside of one first positioning concave surface 141, passes over the first stop 142, and embeds itself into the inside of another first positioning concave surface 141. The upper pop-out pin 123 smoothly slides along the outer peripheral surface of the second positioning wheel 16 and embeds itself into the inside of the second positioning concave surface 161. At the same time, the stop block 17 rotates from one end of the stop groove 160 to abut against the other end of the stop groove 160, thus completely limiting the second rotating shaft 31, preventing the second rotating shaft 31 from continuing to rotate counterclockwise. Therefore, when unfolded from 180 degrees to 360 degrees, the first rotating shaft 21 rotates while the second rotating shaft 31 remains stationary. When the hinge is unfolded to 180 degrees, the two damping elements 12 remain side by side and correspondingly arranged.

[0034] When the hinge extends from 180 degrees to 360 degrees (by...) Figure 11 State transition to Figure 13(state), the first rotating shaft 21 rotates 180 degrees clockwise along its axis (e.g.) Figure 11 (As indicated by the arrow) The second pivot 31 remains stationary due to complete limitation. During this process, under the elastic action of the spring 122, the lower sliding seat 121 slides past the first protrusion 132, exits the first limiting concave surface 131, and abuts against the outer peripheral surface of the first limiting wheel 13. The upper sliding seat 121 slides past the second protrusion 152, exits the second limiting concave surface 151, and abuts against the outer peripheral surface of the second limiting wheel 15, allowing the first pivot 21 and the second pivot 31 to achieve 360-degree full-angle rotation. When the hinge is extended to 360 degrees, the two damping elements 12 remain side by side and correspondingly arranged.

[0035] Therefore, it can be seen that the hinge of this utility model mainly consists of three stages of action, wherein: Phase 1 (0-90 degree range): The first rotating shaft 21 dominates the rotation, while the second rotating shaft 31 remains relatively stationary.

[0036] This stage focuses on the smooth unfolding of the screen side, avoiding premature interaction with the second hinge 31 and potential interference. The first hinge 21 completes the initial angle adjustment, reserving ample space for the subsequent rotation of the second hinge 31 and effectively avoiding trajectory conflicts. From a kinematic perspective, the center of gravity and moment of inertia of the first hinge 21 change during rotation, while the relative stillness of the second hinge 31 ensures the stability of the entire hinge system in the initial stage. By controlling the rotational speed and acceleration of the first hinge 21, the stress on the screen during folding can be effectively reduced. Second stage (90-180 degree range): The second rotating shaft 31 dominates the rotation, while the first rotating shaft 21 remains relatively stationary.

[0037] Among them, 90 degrees serves as the switching point for the rotating main body, achieving a "smooth transition" rather than a "forced switch," ensuring that the motion trajectory is continuous without abrupt changes.

[0038] The second rotating shaft 31 serves as the basic support for the equipment. Its rotation center remains fixed at a distance from the reference plane (such as a tabletop), and its rotation trajectory is a standard circular arc. When rotated to 180 degrees, the second rotating shaft 31 can precisely position the first rotating shaft 21 on the reference plane, avoiding the misalignment caused by the "each operating independently" in traditional dual-axis designs. This is also the core design feature to eliminate "lightning-fast step differences." This design ensures that in the 180-degree unfolded state, the movement trajectories of the first rotating shaft 21 and the second rotating shaft 31 are perfectly connected, without abrupt changes or misalignment, forming a continuous and flat surface. The third stage (180-360 degree range): the first rotating shaft 21 once again dominates the rotation, while the second rotating shaft 31 remains relatively stationary.

[0039] This stage is mainly used to achieve the 360-degree flipping function without affecting the 180-degree flattening effect. Since 180 degrees is the end point of the rotation of the second rotating axis 31, the first rotating axis 21 only starts rotating again after 180 degrees, ensuring that the stability and flatness in the 180-degree state are not affected by subsequent actions. The core innovation of this three-section folding design lies in clarifying the motion logic of each component through segmented control, reducing interference between components, improving fitting accuracy, and making the linkage of each component more coordinated, thus completely solving the misalignment problem caused by the two sets of rotating shafts competing for dominance in the traditional dual-axis design.

[0040] Understandably, when the hinge folds back from the unfolded state to the closed state, the two sets of pivots move in reverse order from 360 degrees → 180 degrees → 90 degrees → 0 degrees according to the above-mentioned motion principle.

[0041] The aforementioned three-section hinge folding structure is ingenious and easy to use. Through the segment switching component 10, the first rotating shaft 21 and the second rotating shaft 31 alternately dominate the rotation. Combined with the precise cooperation of the first limiting wheel 13, the second limiting wheel 15, the first positioning wheel 14, the second positioning wheel 16 and the two damping components 12, it solves the problem of lightning-fast segment drop when the traditional dual-axis two-section structure unfolds 180 degrees, realizes the coplanar flattening of the back shell, and improves the product's appearance integration and high-end texture.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A three-section hinged folding structure, characterized in that, include: The segmented switching assembly includes three support plates arranged in parallel intervals, damping components slidably mounted between two adjacent support plates, a first limiting wheel and a first positioning wheel corresponding to opposite sides of one damping component, a second limiting wheel and a second positioning wheel corresponding to opposite sides of another damping component, and a stop block protruding from one end of one support plate; the stop block is used to embed and abut against the second positioning wheel; the outer peripheral surface of the first limiting wheel is recessed inward to form a first limiting concave surface, and the outer peripheral surface of the second limiting wheel is recessed inward to form a second limiting concave surface; the outer peripheral surface of the first positioning wheel is recessed inward to form two adjacent first positioning concave surfaces, and the outer peripheral surface of the second positioning wheel is recessed inward to form a second positioning concave surface; one damping component is elastically clamped between the first limiting wheel and the first positioning wheel, and another damping component is elastically clamped between the second limiting wheel and the second positioning wheel; the damping component elastically abuts against the first limiting concave surface, the second limiting concave surface, the first positioning concave surface, and the second positioning concave surface to provide rotational damping; A first hinge assembly on one side of the coaxial connection segment switching component, the first hinge assembly being used to connect to the device screen side; and A second rotating shaft assembly is coaxially connected to the other side of the segmented switching assembly. The second rotating shaft assembly is used to connect to the equipment carrier side. 0-90 degree range: the first rotating shaft assembly rotates while the second rotating shaft assembly remains stationary; 90-180 degree range: the second rotating shaft assembly rotates while the first rotating shaft assembly remains stationary; 180-360 degree range: the first rotating shaft assembly rotates again while the second rotating shaft assembly remains stationary; by alternating segmented rotation, the back segment difference during 180-degree unfolding is eliminated.

2. The hinge-type three-segment folding structure according to claim 1, characterized in that, The first limit wheel and the second limit wheel are coaxially arranged, and the first positioning wheel and the second positioning wheel are coaxially arranged.

3. The hinge-type three-segment folding structure according to claim 1, characterized in that, The outer diameters of the first limiting wheel, the second limiting wheel, the first positioning wheel, and the second positioning wheel are all equal.

4. The hinge-type three-segment folding structure according to claim 1, characterized in that, Each support plate has a groove in the middle; the damping component includes a sliding seat, a spring embedded in one side of the sliding seat, a spring-loaded pin that abuts the spring, and protrusions protruding from the top and bottom surfaces of the sliding seat respectively; the protrusions are matched and embedded in the groove.

5. The hinge-type three-segment folding structure according to claim 4, characterized in that, The sliding seat is used to abut against the first and second limit wheels, and the pop-out pin is used to extend beyond the side of the sliding seat and abut against the first and second positioning wheels.

6. The hinge-type three-segment folding structure according to claim 1, characterized in that, The second positioning wheel has a stop groove on its periphery at the end furthest from the first positioning wheel; the stop block is fitted into the stop groove.

7. The hinge-type three-segment folding structure according to claim 1, characterized in that, The first rotating shaft assembly includes a first rotating shaft, a first spring plate coaxially sleeved on the first rotating shaft, and a first self-locking nut screwed to the end of the first rotating shaft; the first rotating shaft passes through three support plates, and the first limiting wheel, the second limiting wheel, and the first spring plate located between the three support plates are screwed to the first self-locking nut; the first rotating shaft rotates synchronously with the first limiting wheel and the second limiting wheel on the same axis.

8. The hinge-type three-segment folding structure according to claim 1, characterized in that, The second rotating shaft assembly includes a second rotating shaft, a second spring plate coaxially sleeved on the second rotating shaft, and a second self-locking nut screwed to the end of the second rotating shaft; the second rotating shaft passes through three support plates, and the second self-locking nut is screwed onto the first positioning wheel, the second positioning wheel, and the second spring plate located between the three support plates; the second rotating shaft rotates synchronously with the first positioning wheel and the second positioning wheel.

Images