A hinge of an inner folding flexible screen folding electronic terminal

Abstract

The utility model provides a kind of hinge of inner folding flexible screen folding electronic terminal, middle left side movable plate includes middle left side outer movable plate and middle left side inner movable plate respectively, middle right side movable plate includes middle right side outer movable plate and middle right side inner movable plate;Middle left side outer movable plate and middle right side outer movable plate are respectively located outside movable in the middle shell both sides of inner folding flexible screen folding electronic terminal, middle left side inner movable plate and middle right side inner movable plate are respectively rotatably installed in middle shell by its left side and right side and are respectively with middle left side inner movable plate and middle right side inner movable plate same rotation axis axis.The utility model for the hinge of setting movable support plate, the gap of middle when being flattened can be further reduced, improve the experience of touch control operation, and more match the lower profile of the shape of "water drop" when flexible screen folds.

Description

Technical Field

[0001] This utility model relates to a hinge for a flexible screen folding electronic terminal, which can be a mobile phone, laptop computer, etc. Background Technology

[0002] In an inward-folding flexible screen folding electronic terminal, the two side shells are connected by hinges, allowing them to be flattened and folded. Flexible screen support plates are installed on the inner sides of the two side shells, and the flexible screen is laid on the inner side of the inward-folding flexible screen folding electronic terminal. In one structure, movable support plates are also connected to the hinges. When the inward-folding flexible screen folding electronic terminal is flattened, the left movable support plate is located on the right side of the left side shell and the top left side of the middle shell, while the right movable support plate is located on the left side of the right side shell and the top right side of the middle shell, supporting the flexible screen as close to the center as possible. When the inward-folding flexible screen folding electronic terminal is folded, the left and right movable support plates rotate at a larger angle (over 90°) compared to the left and right side shells, creating space at the bottom for the folding bulge in the middle of the flexible screen. Ideally, the two movable support plates should extend as far into the middle housing as possible when folded to minimize the gap between them when unfolded. However, even so, due to the large rotation angles of the left and right movable support plates, it is impossible for them to extend too far. When unfolded, there is a large gap between them, which affects the user experience of operating the flexible screen in the middle. Utility Model Content

[0003] The purpose of this invention is to provide a hinge for an inward-folding flexible screen folding electronic terminal, which, for a design with a movable support plate, can further reduce the gap in the middle when flattened. To this end, this invention adopts the following technical solution:

[0004] A hinge for an inward-folding flexible screen folding electronic terminal includes a left connecting arm and a right connecting arm, as well as a left sliding frame and a right sliding frame. The left and right connecting arms are rotatably mounted on both sides of a central support. The left and right sliding frames are slidably connected to the left and right connecting arms, respectively. The left and right sliding frames can slide along rotation axes perpendicular to the left and right connecting arms, respectively, when the flexible screen folding electronic terminal is opened and folded. The left and right sliding frames are respectively provided with connection points to the left and right shells of the flexible screen folding electronic terminal. The hinge also includes a central left movable plate and a central right movable plate. The central left movable plate includes a central left external movable plate and a central left internal movable plate, and the central right movable plate includes a central right external movable plate and a central right internal movable plate.

[0005] The inner ends of the left and right external movable plates of the middle section are rotatably mounted on both sides of the middle support via the first and second axes, respectively. They are located outside the middle shell of the inward-folding flexible screen folding electronic terminal and can move outside the shell. The rotation angle from the flattened state to the folded state is greater than 90°, forming a flexible screen folding clearance space outside the shell. The left and right sliding frames are rotatably connected to the back of the left and right external movable plates of the middle section, respectively, and can be driven to slide by the left and right external movable plates of the middle section during rotation.

[0006] The left and right internal movable plates are rotatably mounted in the middle shell via their left and right sides, respectively, and are on the same rotation axis as the left and right internal movable plates. The hinge also provides motion control mechanisms for the left and right internal movable plates. When the corresponding inward-folding flexible screen folding electronic terminal is unfolded, the left and right internal movable plates are driven to rotate to the top of the middle shell and support the left and right internal movable plates that are unfolded on the top of the middle shell. When the corresponding inward-folding flexible screen folding electronic terminal is folded, the left and right internal movable plates are driven to rotate into the middle shell to the maximum limit angle, with the rotation angle being less than 90°, thus forming a clearance space inside the middle shell for the portion of the flexible screen that is located inside the middle shell when it is folded.

[0007] Based on the above technical solution, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0008] The motion control mechanism on the left is located between the left connecting arm and the middle left internal movable plate, while the motion control mechanism on the right is located between the right connecting arm and the middle right internal movable plate.

[0009] The motion control mechanism on the left side includes a pin groove fit between the left connecting arm near its rotation axis and the left side of the middle left inner movable plate, and a pin groove fit between the right connecting arm near its rotation axis and the right side of the middle right inner movable plate.

[0010] When the hinge rotates from a folded state to a flattened state, the pin-groove engagement initially forms a free-travel engagement before transitioning to a driven coupling engagement. When the hinge rotates from a flattened state to a folded state, the pin-groove engagement initially forms a driven coupling engagement; after the inner movable plates on the left and right sides of the center rotate to engage with the rotation angle limiting structure, the pin-groove engagement becomes a free-travel engagement. During the free-travel engagement, the corresponding inner movable plate on the left or right side of the center is not driven to rotate.

[0011] The motion control mechanism on the left is a first cam mechanism located on the first shaft, and the motion control mechanism on the right is a second cam mechanism located on the second shaft. Both the first cam mechanism and the second cam mechanism include a first rotating end face cam and a second rotating end face cam that cooperate with each other and are pressed together by a spring. In the motion control mechanism on the left, the first rotating end face cam is connected to the outer movable plate on the left side of the middle section, and the second rotating end face cam is connected to the inner movable plate on the left side of the middle section. In the motion control mechanism on the right, the first rotating end face cam is connected to the outer movable plate on the right side of the middle section, and the second rotating end face cam is connected to the inner movable plate on the right side of the middle section. One of the first rotating end face cam and the second rotating end face cam can slide axially in the cam engagement.

[0012] When the hinge rotates from a folded state to a flattened state, the engagement of the first and second rotating end face cams is initially a no-travel engagement, and then transitions to a driven coupling engagement. When the hinge rotates from a flattened state to a folded state, the engagement of the first and second rotating end face cams is initially a driven coupling engagement. After the inner movable plates on the left and right sides of the middle section rotate to engage with the rotation angle limiting structure, the engagement of the first and second rotating end face cams becomes a no-travel engagement. During the no-travel engagement, the corresponding inner movable plates on the left or right sides of the middle section are not driven to rotate.

[0013] The right end of the left outer movable plate of the middle section is provided with a left support structure for the left inner movable plate of the middle section; the left end of the right outer movable plate of the middle section is provided with a right support structure for the right inner movable plate of the middle section; when the left inner movable plate of the middle section and the right inner movable plate of the middle section are in a flattened state, the left support structure and the right support structure are respectively located below the left side of the left inner movable plate of the middle section and below the right side of the right inner movable plate of the middle section, respectively supporting the left inner movable plate of the middle section and the right inner movable plate of the middle section.

[0014] The motion control mechanism on the left includes a reset elastic mechanism and a left support structure for the inner movable plate on the left side of the middle left side, which is located at the right end of the outer movable plate on the left side of the middle left side. The motion control mechanism on the right includes a reset elastic mechanism and a right support structure for the inner movable plate on the left side of the middle left side, which is located at the left end of the outer movable plate on the right side of the middle right side. When the inner movable plates on the left side and the right side of the middle right side are in a flattened state, the left support structure and the right support structure are located at the lower left side of the inner movable plate on the left side of the middle left side and the lower right side of the inner movable plate on the right side of the middle right side, respectively, and support the inner movable plates on the left side and the right side of the middle right side, respectively.

[0015] The reset elastic mechanism of the left-side inner movable plate is located between the left-side outer movable plate and the left-side inner movable plate, or between the left-side inner movable plate and the central support; the reset elastic mechanism of the right-side inner movable plate is located between the right-side outer movable plate and the right-side inner movable plate, or between the right-side inner movable plate and the central support.

[0016] The support structure is a short support structure that extends into the middle shell.

[0017] The central support or shell is provided with a rotation angle limiting structure for the central left inner movable plate and the central right inner movable plate.

[0018] By adopting the technical solution of this utility model, the movable support plate on each side is decomposed into two independent parts: an inner part inside the middle shell and an outer part outside the shell. When folding and rotating, the inner part is not required to rotate at the same angle as the outer part, and it will no longer be blocked or interfered with by the middle shell as before. It can obtain sufficient width to eliminate or significantly reduce the middle gap between the support plates when unfolded, improve the touch operation experience, and better match the lower shape of the "teardrop" shape when the flexible screen is folded. Furthermore, the internal support plate of this utility model can be automatically driven to rotate and obtain reliable support when unfolded and folded, improving precision and further enhancing the touch operation experience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the inward-folding flexible screen folding electronic terminal of this utility model viewed from the front in its flattened state.

[0020] Figure 2 This is an exploded view of the structure of the first embodiment of the present invention.

[0021] Figure 3 This is a front view of the first embodiment of the present invention in a flattened state.

[0022] Figures 4-6 This is a front view of the first embodiment of the present invention at different opening angles.

[0023] Figure 7 This is a front view of the first embodiment of the present invention in a folded state.

[0024] Figure 8 This is a cross-sectional view of the first embodiment of the present invention in a flattened state.

[0025] Figures 9-11 This is a cross-sectional view of the first embodiment of the present invention at different opening angles.

[0026] Figure 12This is a cross-sectional view of the first embodiment of the present invention in a folded state.

[0027] Figure 13 This is a schematic diagram of the assembly state of the first embodiment of the present invention, in which the inner support plate in the middle is hidden.

[0028] Figure 14 This is a schematic diagram of a partial structure of the hinge of this utility model.

[0029] Figures 15-16 These are cross-sectional views of the second and third embodiments of this utility model in a flattened state.

[0030] Figure 17 This is a partial structural schematic diagram of the fourth embodiment of the present invention. Detailed Implementation

[0031] Example 1, referring to Figures 1-14 .

[0032] This utility model provides a hinge for an inwardly folding flexible screen electronic terminal, including a left connecting arm 11 and a right connecting arm 12, as well as a left sliding frame 21 and a right sliding frame 22. The left connecting arm 11 and the right connecting arm 12 are rotatably mounted on both sides of a central support 200, which is fixed in the middle shell 100 of the flexible screen folding electronic terminal. The flexible screen folding electronic terminal includes a left shell 201, a right shell 202, a flexible screen 300, and the hinge. The left shell 201 and the right shell 202 contain flexible screen support plates. The flexible screen 300 is disposed on the inner side of the flexible screen folding electronic terminal and is connected to the left shell 201 and the right shell 202 respectively. The left shell 201 and the right shell 202 are connected to the hinge of this utility model, enabling the flexible screen to be folded and flattened. The left sliding bracket 21 and the right sliding bracket 22 are respectively provided with parts that connect to the left housing 201 and the right housing 202, such as screw connection parts 210 and 220, which are connected to the left housing 201 and the right housing 202.

[0033] The left sliding frame 21 and the right sliding frame 22 are slidably connected to the left connecting arm 11 and the right connecting arm 12, respectively. The left sliding frame 21 and the right sliding frame 22 are respectively provided with slide rails that cooperate with the left connecting arm 11 and the right connecting arm 12. The left sliding frame 21 and the right sliding frame 22 can slide along the rotation axis perpendicular to the left connecting arm 11 and the rotation axis perpendicular to the right connecting arm 12, respectively, when the flexible screen folding electronic terminal is opened and folded. In the attached figure, 110 and 120 are the axes of the left connecting arm 11 and the right connecting arm 12, respectively.

[0034] A clearance groove 203 is formed between the structure 201 connected to the left-side hinge rotation mechanism and the structure 202 connected to the right-side hinge rotation mechanism on the central support 200. This clearance groove 203 allows the following internal movable plates 512 and 522 on the left and right sides of the central support to rotate into when the flexible screen folds inward, and also into the portion of the flexible screen 300 located within the middle shell when folded (e.g., ...). Figure 7 The flexible screen 300 shown enters the "teardrop" shape at the bottom when folded, with the outer shape 302 gradually shrinking from the top to the middle and top as it bulges out the most from the bottom.

[0035] The hinge also includes a left-center movable plate and a right-center movable plate. The left-center movable plate includes a left-center outer movable plate 511 and a left-center inner movable plate 512. The right-center movable plate includes a right-center outer movable plate 521 and a right-center inner movable plate 522.

[0036] The inner ends of the left outer movable plate 511 and the right outer movable plate 521 are rotatably mounted on both sides of the central support 200 via the first shaft 410 and the second shaft 420, respectively. They are located outside the middle shell 100 of the inward folding flexible screen electronic terminal. When the corresponding inward folding flexible screen electronic terminal is unfolded, it rotates to the unfolded position to support the flexible screen 300. When the inward folding flexible screen electronic terminal is folded, the rotation angle from the unfolded state to the folded state is greater than 90°, forming a flexible screen folding clearance space 501 outside the middle shell, which matches the upper outer shape 301 of the "teardrop" shape when the flexible screen 300 is folded. The left sliding frame 21 and the right sliding frame 22 are rotatably connected to the back side of the middle left external movable plate 511 and the middle right external movable plate 521, respectively. They can be driven to slide by the middle left external movable plate 21 and the middle right external movable plate 22 during rotation. When the inward flexible screen folding electronic terminal is folded, the left sliding frame 21 and the right sliding frame 22 are pushed to slide away from the middle shell 100. When the inward flexible screen folding electronic terminal is unfolded, the left sliding frame 21 and the right sliding frame 22 are driven to slide closer to the middle shell 100. The rotatable connection can be achieved through the virtual center rotatable connection structure 40 composed of arc slider and arc guide groove.

[0037] The hinge is also equipped with a motion control mechanism for the left-center movable plate 512 and the right-center movable plate 522. When the corresponding inward-folding flexible screen folding electronic terminal is unfolded, the left-center movable plate 512 and the right-center movable plate 522 are respectively driven to rotate to the top of the middle shell 100 and support the left-center movable plate 512 and the right-center movable plate 522 respectively. When the corresponding inward-folding flexible screen folding electronic terminal is folded, the left-center movable plate 512 and the right-center movable plate 522 are driven to rotate into the middle shell 100 to the maximum limit angle. The rotation angle is less than 90° respectively, and a clearance space 502 is formed inside the middle shell for the part of the flexible screen 300 located inside the middle shell 100 when it is folded. Specifically, the part of the flexible screen 300 located inside the middle shell 100 when it is folded is the lower part of the "teardrop" shape of the flexible screen 300, which gradually shrinks from the maximum bulge to the top center when it is folded. As shown in the figure, the left-side movable plate 512 and the right-side movable plate 522 rotate about axes 410 and 420 located to their left and right sides, respectively. When the rotation angle inside the middle shell 100 is an acute angle, it can properly fit the lower part of the "teardrop" shape. Thus, since it is not necessary to rotate through the bottom of the middle shell 100, the left-side movable plate 512 and the right-side movable plate 522 can be designed to be wider and fit together, eliminating or reducing the gap 503 between them when flattened. This rotation angle can be more precisely controlled by the rotation angle limiting structure described below.

[0038] In this embodiment, the left motion control mechanism is located between the left connecting arm 11 and the middle left inner movable plate 512, and the right motion control mechanism is located between the right connecting arm 12 and the middle right inner movable plate 522. In this embodiment, the left motion control mechanism includes a pin 611 located at an eccentric position near its rotation axis (shaft 110) on the left connecting arm 11 and a groove 612 on the middle left inner movable plate 512 that engages with the pin 611. The right motion control mechanism includes a pin 621 located at an eccentric position near its rotation axis (shaft 120) on the right connecting arm 12 and a groove 622 on the middle right inner movable plate 522 that engages with the pin 621.

[0039] The central support 200 is provided with rotation angle limiting structures 2001 and 2002 for the central left inner movable plate 512 and the central right inner movable plate 522. When the hinge rotates from the folded state to the flattened direction, the engagement of pin 611 with slot 612 and the engagement of pin 621 with slot 622 are initially in a free-stroke engagement, and then enter a driven coupling engagement. The engagement between pin 621 and slot 622 is initially a driven coupling engagement. After the inner movable plate 512 on the left side and the inner movable plate 522 on the right side rotate to engage with the rotation angle limiting structures 2001 and 2002, the engagement between pin 611 and slot 612 and the engagement between pin 621 and slot 622 becomes a free-stroke engagement. During the free-stroke engagement, the movement of the pin does not drive the corresponding inner movable plate 512 on the left side or the inner movable plate 522 on the right side to rotate.

[0040] The hinge also includes a support structure for the inner movable plate 512 on the left side and the inner movable plate 522 on the right side of the middle section when the hinge is flattened, i.e., when it is flattened on top of the middle shell 200 to support the flexible screen 300. The drive coupling of the aforementioned pin and slot also serves as this support structure.

[0041] Furthermore, a left support structure 513 for the left inner movable plate 512 is provided at the right end of the left outer movable plate 511; a right support structure 524 for the right inner movable plate 522 is provided at the left end of the right outer movable plate 521. This provides better support for the left inner movable plate 512 and the right inner movable plate 522 when they are flattened, i.e., when they are flattened on the top of the middle shell 200 to support the flexible screen 300. Support structures 513 and 524 can be short arms that extend into the middle shell 100. When the left outer movable plate 511 and the right outer movable plate 521 are unfolded, they are located directly below the left side of the left inner movable plate 512 and the right side of the right inner movable plate 522. When the left outer movable plate 511 and the right outer movable plate 521 are rotated to the folded state, because the support structures 513 and 524 are short support structures, they do not interfere with the middle shell 100 or the middle support 200.

[0042] The left connecting arm 11 and the right connecting arm 12 are connected by a synchronous counter-rotation connection structure 10, which allows the housings 201 and 202 on both sides to rotate synchronously in opposite directions. The synchronous counter-rotation connection structure includes a left cam engagement mechanism fitted onto the left connecting arm shaft 110 and a right cam engagement mechanism fitted onto the right connecting arm shaft 120. The left cam engagement mechanism includes a rotating end face cam 111 connected to the left connecting arm 11 and a sliding end face cam 112 that can slide relative to the shaft 110. The right cam engagement mechanism includes a rotating end face cam 121 connected to the right connecting arm 12 and a sliding end face cam 122 that can slide relative to the shaft 120. The two sliding end face cams 112 and 122 are connected by a connecting plate 130 near the bottom of the middle housing. The connecting plate 130 is recessed to the bottom of the middle housing 200; the middle support 200 is segmented, avoiding the middle housing portion where the connecting plate 130 is located, and the connecting plate 130 can be recessed only to allow for its sliding clearance.

[0043] The hinge includes resistance torque mechanisms corresponding to the left and right rotating mechanisms. Both the left and right resistance torque mechanisms include friction mechanisms, cam mechanisms (including fixed and movable cams), and compression springs, with shafts 110 and 120 fitted onto the corresponding sides. These structures are all existing technologies. The fixed friction mechanisms in the left and right resistance torque mechanisms are connected by a second bottom connector 61, and the fixed cams in the left and right resistance torque mechanisms are connected by a third bottom connector 62. The central support 200 avoids the middle shell portion where the second bottom connector is located, and the central support 200 also avoids the middle shell portion where the third bottom connector 62 is located.

[0044] Example 2, refer to Figure 15 Please also refer to Figures 1-14

[0045] In this embodiment, the motion control mechanism of Embodiment 1 is modified as follows:

[0046] The left-side motion control mechanism includes a reset elastic mechanism and a support structure 513 for the middle left-side internal movable plate located at the right end of the middle left-side external movable plate 511. The right-side motion control mechanism includes a reset elastic mechanism and a support structure 523 for the middle left-side internal movable plate located at the left end of the middle right-side external movable plate 521. When the middle left-side internal movable plate and the middle right-side internal movable plate are in a flattened state, the support structure and the right support structure are located at the lower left side of the middle left-side internal movable plate 512 and the lower right side of the middle right-side internal movable plate 522, respectively, supporting the middle left-side internal movable plate 512 and the middle right-side internal movable plate 522.

[0047] The reset elastic mechanism of the inner movable plate 512 on the left side of the middle section is located between the outer movable plate 511 on the left side of the middle section and the inner movable plate 512 on the left side of the middle section, and adopts a torsion spring 31. The reset elastic mechanism of the inner movable plate 522 on the right side of the middle section is located between the outer movable plate 521 on the right side of the middle section and the inner movable plate 522 on the right side of the middle section, and adopts a torsion spring 31.

[0048] The support structures 513 and 523 are short support structures that extend into the middle shell 100.

[0049] Other parts of the hinge in this embodiment can be referred to in Embodiment 1.

[0050] Example 3, referring to Figure 16 Please also refer to Figures 1-14

[0051] In this embodiment, the motion control mechanism of Embodiment 1 is modified as follows:

[0052] The left-side motion control mechanism includes a reset elastic mechanism and a support structure 513 for the middle left-side internal movable plate located at the right end of the middle left-side external movable plate 511. The right-side motion control mechanism includes a reset elastic mechanism and a support structure 523 for the middle left-side internal movable plate located at the left end of the middle right-side external movable plate 521. When the middle left-side internal movable plate and the middle right-side internal movable plate are in a flattened state, the support structure and the right support structure are located at the lower left side of the middle left-side internal movable plate 512 and the lower right side of the middle right-side internal movable plate 522, respectively, supporting the middle left-side internal movable plate 512 and the middle right-side internal movable plate 522.

[0053] The reset elastic mechanism of the left-side inner movable plate 512 is located between the central support 200 and the left-side inner movable plate 512, and uses a tension spring 33. The reset elastic mechanism of the right-side inner movable plate 522 is located between the central support 200 and the right-side inner movable plate 522, and uses a tension spring 34.

[0054] Other parts of the hinge in this embodiment can be referred to in Embodiment 1.

[0055] Example 4, refer to Figure 17 Please also refer to Figures 1-14

[0056] In this embodiment, the motion control mechanism of Embodiment 1 is modified as follows:

[0057] The motion control mechanism on the left is a first cam mechanism located on the shaft 410, and the motion control mechanism on the right is a second cam mechanism located on the shaft 420. Both the first and second cam mechanisms include cooperating first rotating end face cams 711 and 712 and second rotating end face cams 721 and 722, which are pressed together by springs 713 and 723. In the motion control mechanism on the left, the first rotating end face cam 711 is connected to the middle left outer movable plate 511, and the second rotating end face cam 712 is connected to the middle left inner movable plate 511. In the motion control mechanism on the right, the first rotating end face cam 721 is connected to the middle right outer movable plate 521, and the second rotating end face cam 722 is connected to the middle right inner movable plate 522. The second rotating end face cams 712 and 722 can slide axially in the cam engagement, not only relative to the shaft, but also slidably connected to the middle left outer movable plate 511 through a sliding connection structure 714 and to the middle right outer movable plate 511 through a sliding connection structure 724, respectively.

[0058] When the hinge rotates from a folded state to a flattened state, the engagement of the first rotating end face cams 711 and 721 and the second rotating end face cams 721 and 722 is initially a no-travel engagement, and then enters a driven coupling engagement. When the hinge rotates from a flattened state to a folded state, the engagement of the first rotating end face cams 711 and 721 and the second rotating end face cams 721 and 722 is initially a driven coupling engagement. After the middle left inner movable plate 511 and the middle right inner movable plate 521 rotate to a limiting engagement with the rotation angle limiting structure, the engagement of the first rotating end face cams 711 and 721 and the second rotating end face cams 721 and 722 becomes a no-travel engagement. During the no-travel engagement, the left motion control mechanism does not drive the middle left inner movable plate 511 to rotate, and the right motion control mechanism does not drive the middle right inner movable plate 521 to rotate.

[0059] In this embodiment, the support structures 513 and 523 are also provided.

[0060] Other parts of the hinge in this embodiment can be referred to in Embodiment 1.

[0061] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.

[0062] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

Claims

1. A hinge for an inward-folding flexible screen folding electronic terminal, comprising a left connecting arm and a right connecting arm, as well as a left sliding frame and a right sliding frame, wherein the left and right connecting arms are rotatably mounted on both sides of a central support, and the left and right sliding frames are slidably connected to the left and right connecting arms respectively, and the left and right sliding frames can slide along rotation axes perpendicular to the left and right connecting arms respectively when the flexible screen folding electronic terminal is opened and folded, and the left and right sliding frames are respectively provided with connection points to the left and right shells of the flexible screen folding electronic terminal; the hinge further comprises a central left movable plate and a central right movable plate, characterized in that, The movable panel on the left side of the middle section includes an outer movable panel on the left side of the middle section and an inner movable panel on the left side of the middle section, and the movable panel on the right side of the middle section includes an outer movable panel on the right side of the middle section and an inner movable panel on the right side of the middle section; The inner ends of the left and right external movable plates of the middle section are rotatably mounted on both sides of the middle support via the first and second axes, respectively. They are located outside the middle shell of the inward-folding flexible screen folding electronic terminal and can move outside the shell. The rotation angle from the flattened state to the folded state is greater than 90°, forming a flexible screen folding clearance space outside the shell. The left and right sliding frames are rotatably connected to the back of the left and right external movable plates of the middle section, respectively, and can be driven to slide by the left and right external movable plates of the middle section during rotation. The left and right internal movable plates are rotatably mounted in the middle shell via their left and right sides, respectively, and are on the same rotation axis as the left and right internal movable plates. The hinge also provides motion control mechanisms for the left and right internal movable plates. When the corresponding inward-folding flexible screen folding electronic terminal is unfolded, the left and right internal movable plates are driven to rotate to the top of the middle shell and support the left and right internal movable plates that are unfolded on the top of the middle shell. When the corresponding inward-folding flexible screen folding electronic terminal is folded, the left and right internal movable plates are driven to rotate into the middle shell to the maximum limit angle, with the rotation angle being less than 90°, thus forming a clearance space inside the middle shell for the portion of the flexible screen that is located inside the middle shell when it is folded.

2. The hinge of the inward-folding flexible screen folding electronic terminal as described in claim 1, characterized in that, The motion control mechanism on the left is located between the left connecting arm and the middle left internal movable plate, while the motion control mechanism on the right is located between the right connecting arm and the middle right internal movable plate.

3. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 2, characterized in that, The motion control mechanism on the left side includes a pin groove fit between the left connecting arm near its rotation axis and the left side of the middle left inner movable plate, and a pin groove fit between the right connecting arm near its rotation axis and the right side of the middle right inner movable plate.

4. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 3, characterized in that, When the hinge rotates from a folded state to a flattened state, the pin-groove engagement initially forms a free-travel engagement before transitioning to a driven coupling engagement. When the hinge rotates from a flattened state to a folded state, the pin-groove engagement initially forms a driven coupling engagement; after the inner movable plates on the left and right sides of the center rotate to engage with the rotation angle limiting structure, the pin-groove engagement becomes a free-travel engagement. During the free-travel engagement, the corresponding inner movable plate on the left or right side of the center is not driven to rotate.

5. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 1, characterized in that, The motion control mechanism on the left is a first cam mechanism located on the first shaft, and the motion control mechanism on the right is a second cam mechanism located on the second shaft. Both the first cam mechanism and the second cam mechanism include a first rotating end face cam and a second rotating end face cam that cooperate with each other and are pressed together by a spring. In the motion control mechanism on the left, the first rotating end face cam is connected to the outer movable plate on the left side of the middle section, and the second rotating end face cam is connected to the inner movable plate on the left side of the middle section. In the motion control mechanism on the right, the first rotating end face cam is connected to the outer movable plate on the right side of the middle section, and the second rotating end face cam is connected to the inner movable plate on the right side of the middle section. One of the first rotating end face cam and the second rotating end face cam can slide axially in the cam engagement.

6. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 5, characterized in that, When the hinge rotates from a folded state to a flattened state, the engagement of the first and second rotating end face cams is initially a no-travel engagement, and then transitions to a driven coupling engagement. When the hinge rotates from a flattened state to a folded state, the engagement of the first and second rotating end face cams is initially a driven coupling engagement. After the inner movable plates on the left and right sides of the middle section rotate to engage with the rotation angle limiting structure, the engagement of the first and second rotating end face cams becomes a no-travel engagement. During the no-travel engagement, the corresponding inner movable plates on the left or right sides of the middle section are not driven to rotate.

7. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 2, 3, 4, 5, or 6, characterized in that, The right end of the left outer movable plate of the middle section is provided with a left support structure for the left inner movable plate of the middle section; the left end of the right outer movable plate of the middle section is provided with a right support structure for the right inner movable plate of the middle section; when the left inner movable plate of the middle section and the right inner movable plate of the middle section are in a flattened state, the left support structure and the right support structure are respectively located below the left side of the left inner movable plate of the middle section and below the right side of the right inner movable plate of the middle section, respectively supporting the left inner movable plate of the middle section and the right inner movable plate of the middle section.

8. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 7, characterized in that, The support structure is a short support structure that extends into the middle shell.

9. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 1, characterized in that, The motion control mechanism on the left includes a reset elastic mechanism and a left support structure for the inner movable plate on the left side of the middle left side, which is located at the right end of the outer movable plate on the left side of the middle left side. The motion control mechanism on the right includes a reset elastic mechanism and a right support structure for the inner movable plate on the left side of the middle left side, which is located at the left end of the outer movable plate on the right side of the middle right side. When the inner movable plates on the left side and the right side of the middle right side are in a flattened state, the left support structure and the right support structure are located at the lower left side of the inner movable plate on the left side of the middle left side and the lower right side of the inner movable plate on the right side of the middle right side, respectively, and support the inner movable plates on the left side and the right side of the middle right side, respectively.

10. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 9, characterized in that, The reset elastic mechanism of the left-side inner movable plate is located between the left-side outer movable plate and the left-side inner movable plate, or between the left-side inner movable plate and the central support; the reset elastic mechanism of the right-side inner movable plate is located between the right-side outer movable plate and the right-side inner movable plate, or between the right-side inner movable plate and the central support.

11. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claim 9 or 10, characterized in that, The support structure is a short support structure that extends into the middle shell.

12. The hinge of an inwardly folding flexible screen folding electronic terminal as described in claims 1, 2, 3, 4, 5, 6, 9, or 10, characterized in that, The central support or shell is provided with a rotation angle limiting structure for the central left inner movable plate and the central right inner movable plate.

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