Hinge of mobile terminal having inward-folding flexible screen

Abstract

A hinge of a mobile terminal having an inward-folding flexible screen, said hinge comprising a intermediate base (100), a left-side rotating connecting frame (11), a right-side rotating connecting frame (12), a synchronous reverse rotating connecting mechanism, and a torque module. The left-side rotating connecting frame (11) and the right-side rotating connecting frame (12) are respectively rotatably connected to the intermediate base (100) by means of a virtual rotating center (S) rotating connecting structure, and are respectively provided with structures (112, 122) connecting a left-side supporting plate (31) and a right-side side supporting plate (32). The synchronous reverse rotating connecting mechanism adopts an end face cam synchronous reverse transmission mechanism.

Description

Hinge of inner folding flexible screen mobile terminal TECHNICAL FIELD

[0001] The hinge of the inner folding flexible screen mobile terminal can be a mobile phone, a notebook computer, etc. BACKGROUND

[0002] The screen form of the inner folding flexible screen mobile terminal in the closed state has two types, "water drop type" and "U-type". The former has the characteristics of small screen form at the top and large screen form at the bottom. When closed, the hinge needs to have a floating door plate to cooperate with the movement track to form a water drop-shaped avoidance position to accommodate the screen. The rotation angle of the door plate is greater than that of the hinge body, which causes the door plate to interfere with other mechanisms of the hinge body. The interference part in the closed state needs to be cut off on the door plate. Accordingly, the full-screen adhesion support of the screen cannot be completed in the unfolded state.

[0003] The latter "U-type" form of the inner folding flexible mobile terminal usually adopts a gear synchronization structure. Since the two sides of the folding need to rotate in opposite directions to realize the opening or closing action, the gear set is set in double numbers. At the middle position of the device folding, the gears must be engaged. The cylindrical gear engagement needs to occupy the space in the thickness direction of the device. The hinge of the thin and light design can only make a notch on the screen support plate to avoid the interference part of the closed state with the gear set. Accordingly, the full-screen adhesion support of the screen cannot be completed in the unfolded state.

[0004] The existing product has an unavoidable gap or pit between the screen and the hinge for the avoidance of each mechanism and the screen. The surface in the unfolded state cannot be flat, which causes a feeling of unevenness when touching the OLED. After opening and closing several times, the screen produces creases due to the incomplete support in the space above the hinge. Sharp objects falling on the screen, such as the upper part, are easy to be damaged, and the impact resistance is poor. SUMMARY

[0005] The purpose of the present application is to provide a new scheme for the problems existing in the background art, which can be applied to the inner folding flexible screen mobile terminal, has a simple structure and can realize thin and full support. To this end, the present application adopts the following technical scheme:

[0006] The hinge of the inner folding flexible screen mobile terminal comprises a middle base, left and right rotating connecting frames, a synchronous reverse rotating connecting mechanism and a torque module, wherein the torque module outputs a rotating resistance torque; the left and right rotating connecting frames are connected with the middle base through a virtual rotating center rotating connecting structure formed by an arc sliding rail and an arc sliding block; the left and right rotating connecting frames are respectively provided with structures for connecting flexible screen supporting plates; the synchronous reverse rotating connecting mechanism adopts an end face cam synchronous reverse transmission mechanism, which comprises a middle sliding flat block, a first left connecting arm and a first right connecting arm; the first left and right connecting arms are respectively provided with left and right end face rotating cams; the middle sliding flat block is respectively provided with left and right end face sliding cams matched with the left and right end face rotating cams; the first left and right connecting arms are movably connected with the left and right rotating connecting frames and can synchronously rotate with the left and right rotating connecting frames; when the inner folding flexible screen mobile terminal is unfolded, the height of the virtual rotating center is higher than the rotating axes of the left and right end face rotating cams.

[0007] On the basis of the above technical scheme, the application can also simultaneously adopt the following further technical schemes, or use these further technical schemes in combination.

[0008] The left and right flexible screen supporting plates are arranged; the middle base is fixedly connected with the middle shell of the inner folding flexible screen mobile terminal; the left and right rotating connecting frames are fixedly connected with the left and right supporting plates; the left and right supporting plates cover the left and right rotating connecting frames, the synchronous reverse rotating connecting mechanism and the torque module from below; the left and right supporting plates are spliced above the middle line of the middle base when the inner folding flexible screen mobile terminal is unfolded; the virtual rotating centers of the left and right sides are respectively located above the bottom surfaces of the left and right supporting plates; and the spliced ends of the left and right supporting plates are turned into the middle shell when the flexible screen mobile terminal is folded.

[0009] The synchronous reverse rotating connecting mechanism is provided with first left and right fixed shafts; the left and right end face rotating cams and the left and right end face sliding cams are sleeved on the first left and right fixed shafts; and the first left and right fixed shafts are threadedly connected or interference fit connected with the middle base.

[0010] The left and right rotating connecting frames are respectively provided with long holes, the first left and right connecting arms are respectively connected with connecting shafts, and the connecting shafts are movably connected with the long holes and can slide along the long holes.

[0011] The torque module and the synchronous reverse rotating connecting mechanism are respectively located on the two sides of the virtual rotating center rotating connecting structure.

[0012] The torque module is provided with the second left and right connecting arms, and the second left and right connecting arms are movably connected with the left and right rotating connecting frames and can rotate synchronously with the left and right rotating connecting frames.

[0013] The left and right rotating connecting frames are respectively provided with long holes, the second left and right connecting arms are respectively connected with connecting shafts, and the connecting shafts are movably connected with the long holes and can slide along the long holes.

[0014] The torque module is provided with a connecting seat, the connecting seat and the middle base are connected through screws to form a mounting frame of the torque module, the mounting frame is provided with the second left and right fixed shafts, and the second left and right connecting arms are movably connected with the second left and right fixed shafts through spring tubes.

[0015] The first left and right connecting arms are respectively arranged in two in the axial direction, the cam surfaces of the end face cams on the two first left connecting arms are opposite to each other, the cam surfaces of the end face cams on the two first right connecting arms are opposite to each other, and the middle sliding flat block is provided with corresponding left and right end face sliding cams.

[0016] The end face cam and the end face sliding cam are matched as helical end face cams.

[0017] The U-shape end face cam sliding block synchronous module realizes the design scheme that the hinge is completely hidden under the screen support plate.

[0018] 1. The screen support structure required by the U-shape is simpler, the space required by the hinge is smaller when being flattened, and it is more friendly to prevent damage to the flexible screen when being folded.

[0019] 2. The end face cam sliding block synchronous module is used to replace the traditional gear synchronous transmission mechanism, the main structure of the end face cam sliding block module is not protruding at the middle position, can be arranged flat, does not occupy the middle space, the rotating space of the screen support plate is sufficient, and it is ensured that the two screen support plates can be seamlessly spliced in the unfolded state.

[0020] 3. The full-coverage support plate supports the flexible screen in all directions, ensuring that the screen has no creases, the touch has no creases and no concave-convex feeling, improving the use experience of the writing pen and enhancing the impact resistance of the screen against falling / shocking of sharp objects. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a top view of the inner folding flexible screen mobile terminal embodiment of the present application in a flat state.

[0022] Fig. 2 is a schematic view of the structure shown in Fig. 1 after the flexible screen is hidden.

[0023] Fig. 3 is a sectional view of the inner folding flexible screen mobile terminal embodiment of the present application corresponding to line 2A-A in Fig. 2 when in a U-shaped folding state.

[0024] Fig. 3-1 is an enlarged view of part B in Fig. 3.

[0025] Fig. 4 is a sectional view of the inner folding flexible screen mobile terminal embodiment of the present application corresponding to line 2A-A in Fig. 2 when in a flat state.

[0026] Fig. 4-1 is an enlarged view of part C in Fig. 4.

[0027] Fig. 4-2 is a sectional view of the inner folding flexible screen mobile terminal embodiment of the present application corresponding to line 2D-D in Fig. 2 when in a flat state.

[0028] Fig. 5 is an exploded view of the hinge structure of the embodiment of the present application.

[0029] Fig. 6 is an assembly schematic view of the hinge of the embodiment of the present application. DETAILED DESCRIPTION

[0030] Referring to the drawings, the hinge of the flexible screen mobile terminal provided by the present application includes a middle base 100, left and right rotating connecting frames 11 and 12, a synchronous reverse rotating connecting mechanism, and a torque module that outputs a rotating torque.

[0031] The left and right rotating connecting frames 11 and 12 are each provided with a circular arc sliding block 111 and 121, and the middle base 100 is provided with circular arc sliding rails 101 and 102. The left and right rotating connecting frames 11 and 12 are respectively connected to the middle base 100 through a virtual rotating center rotating connection structure of the circular arc sliding rails and the circular arc sliding blocks. The rotating centers S of the circular arc sliding rails 101 and 102 are all higher than the bottom surface of the flexible screen support plate. The left and right rotating connecting frames 11 and 12 are respectively provided with structures 112 and 122 for connecting the flexible screen support plate, which can be screw connection sites and support sites.

[0032] The synchronous reverse rotation connecting mechanism adopts an end face cam synchronous reverse transmission mechanism, which comprises a middle sliding flat block 20, a first left connecting arm 21 and a first right connecting arm 22, the first left connecting arm 21 and the first right connecting arm 22 are respectively provided with a left end face rotating cam and a right end face rotating cam, the middle sliding flat block 20 is respectively provided with a left end face sliding cam and a right end face sliding cam on the two sides, which are matched with the left end face rotating cam and the right end face rotating cam, the first left connecting arm 21 and the first right connecting arm 22 are respectively connected with the left rotating connecting frame 11 and the right rotating connecting frame 12, and can be synchronously rotated with the left rotating connecting frame 11 and the right rotating connecting frame 12 respectively; when the inner folding flexible screen mobile terminal is unfolded, the height of the virtual rotation center S is higher than the rotation axis of the left end face rotating cam and the right end face rotating cam.

[0033] The inner folding flexible screen mobile terminal is provided with a flexible screen left support plate 31 and a flexible screen right support plate 32, the middle base 100 and the middle shell 200 of the inner folding flexible screen mobile terminal are fixedly connected, the left rotating connecting frame 11 and the right rotating connecting frame 12 are respectively fixedly connected with the flexible screen left support plate 31 and the flexible screen right support plate 32, the structure of the present application makes the thickness of the inner folding flexible screen mobile terminal thinner, and the width of the middle shell 200 can also be freely defined as very narrow, the flexible screen left support plate 31 and the flexible screen right support plate 32 can fully cover the area of the flexible screen, the left rotating connecting frame 11 and the right rotating connecting frame 12, the synchronous reverse rotation connecting mechanism and the torque module are covered below, the virtual rotation centers S of the left side and the right side are respectively located above the bottom surfaces of the flexible screen left support plate 31 and the flexible screen right support plate 32, the flexible screen left support plate 31 and the flexible screen right support plate 32 are spliced directly above the middle line of the middle base 100 when the inner folding flexible screen mobile terminal is unfolded, and the spliced ends of the flexible screen left support plate and the flexible screen right support plate are turned into the middle shell 200 when the inner folding flexible screen mobile terminal is folded. The splicing seam is marked as 30, the support plate without any gap fully supports the flexible screen in all directions, and ensures that the screen is free of creases.

[0034] The synchronous reverse rotation connecting mechanism is provided with a first left side fixed shaft 23 and a first right side fixed shaft 24, a left side end face rotation cam and a left side end face sliding cam are sleeved on the first left side fixed shaft 23, and a right side end face rotation cam and a right side end face sliding cam are sleeved on the first right side fixed shaft 24; the first left side fixed shaft 23 and the second right side fixed shaft 24 are in threaded connection or fixed connection with the intermediate base 100. The torque module and the synchronous reverse rotation connecting mechanism are located on the two sides of the virtual rotation center rotation connecting structure respectively. The torque module is provided with a second left side connecting arm 41 and a second right side connecting arm 42, the second left side connecting arm 41 and the second right side connecting arm 42 are movably connected with the left side rotation connecting frame 11 and the right side rotation connecting frame 12 respectively, and can rotate synchronously with the left side rotation connecting frame 11 and the right side rotation connecting frame 12 respectively. The torque module is provided with a connecting seat 40, the connecting seat 40 and the intermediate base 100 are connected by screws to form a mounting frame of the torque module. The mounting frame is provided with a second left side fixed shaft 43 and a second right side fixed shaft 44, the second left side connecting arm 41 and the second right side connecting arm 42 are rotatably connected with the second left side fixed shaft 43 and the second right side fixed shaft 44 through spring tubes 411 and 421 respectively. The spring tube is an elastic tube with a seam in the axial direction, which clamps the fixed shaft. Through the above preferred embodiment, the structure of the application is not only thin and well supported, but also reasonable in disassembly and easy to assemble.

[0035] The left side rotation connecting frame 11 and the right side rotation connecting frame 12 are respectively provided with long holes 113 and 123, the first left side connecting arm 21 and the first right side connecting arm 22 are respectively connected with a connecting shaft 5, and the connecting shaft 5 is movably connected with the long holes 113 and 123 to be able to slide forward and backward along the long holes. The connecting shaft 5 can have a certain length, the left side rotation connecting frame 11 and the right side rotation connecting frame 12 are respectively provided with a plurality of long holes 113 and 123, and the second left side connecting arm 41 and the second right side connecting arm 42 are also respectively connected with the connecting shaft 5.

[0036] In the end face cam synchronous reverse transmission mechanism, two first left side connecting arms 21 and two first right side connecting arms 22 are respectively arranged in the axial direction, the cam surfaces of the end face cams 21A and 21B on the two first left side connecting arms 21 are opposite to each other, the cam surfaces of the end face cams 22A and 22B on the two first right side connecting arms are opposite to each other, and the intermediate sliding flat block 20 is provided with corresponding left side end face sliding cams 201A and 201B and right side end face sliding cams 202A and 202B.

[0037] In the end face cam synchronous reverse transmission mechanism, the end face cam rotation and the end face sliding cam are in spiral end face cam cooperation.

[0038] In the implementation, a plurality of hinges 300 of the present application are coaxially arranged in the middle shell, and are respectively fixedly connected with the left support plate 31 and the right support plate 32 and covered by the left support plate 31 and the right support plate 32.

[0039] The above merely describes the specific embodiments of the present application, but the structural features of the present application are not limited to this. Any changes or modifications made by those skilled in the art within the scope of the present application are covered by the protection scope of the present application.

[0040] It should be noted that the terms "comprise" and "have" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "mount", "provide", "have", "connect", "connect", "socket" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0041] In the description of the present application, it should be understood that the terms "one end", "the other end", "outer side", "inner side", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only used for simplicity in description, and do not indicate or imply relative importance.

Claims

1. A hinge for an inward-folding flexible screen mobile terminal, comprising a central base, a left-side rotating connecting frame, a right-side rotating connecting frame, a synchronous reverse rotating connecting mechanism, and a torque module, wherein the torque module outputs a rotational resistance torque; The left rotating connecting frame and the right rotating connecting frame are respectively rotatably connected to the middle base through a virtual rotating center rotating connecting structure composed of an arc slide rail and an arc slider, and the left rotating connecting frame and the right rotating connecting frame are respectively provided with a structure for connecting the flexible screen support plate; the synchronous reverse rotating connecting mechanism adopts an end face cam synchronous reverse transmission mechanism, and the end face cam synchronous reverse transmission mechanism includes an intermediate sliding flat block, a first left connecting arm and a first right connecting arm, and the first left connecting arm and the first right connecting arm are respectively provided with a left end face rotating cam and a right end face rotating cam, and the two sides of the intermediate sliding flat block are respectively provided with a left end face sliding cam and a right end face sliding cam that cooperate with the left end face rotating cam and the right end face rotating cam, the first left connecting arm and the first right connecting arm are respectively movably connected to the left rotating connecting frame and the right rotating connecting frame, and can rotate synchronously with the left rotating connecting frame and the right rotating connecting frame respectively; when the inward folding flexible screen mobile terminal is flattened, the height of the virtual rotation center is higher than the rotation axis of the left end face rotating cam and the right end face rotating cam.

2. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that A left support plate and a right support plate for the flexible screen are provided, and the middle base and the middle shell of the inward-folding flexible screen mobile terminal are fixedly connected, and the left rotating connecting frame and the right rotating connecting frame are fixedly connected to the left support plate and the right support plate respectively, and the left support plate and the right support plate cover the left rotating connecting frame and the right rotating connecting frame, the synchronous reverse rotation connection mechanism, and the torque module underneath. When the inward-folding flexible screen mobile terminal is flattened, the left support plate and the right support plate are spliced ​​directly above the center line of the middle base, and the left and right virtual rotation centers are respectively located above the bottom surfaces of the left support plate and the right support plate. When the flexible screen mobile terminal is folded, the spliced ​​ends of the left support plate and the right support plate are turned into the middle shell.

3. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that The synchronous reverse rotation connection mechanism is provided with a first left fixed shaft and a first right fixed shaft, the left end face rotating cam and the left end face sliding cam are loosely mounted on the first left fixed shaft, and the right end face rotating cam and the right end face sliding cam are loosely mounted on the first right fixed shaft; the first left fixed shaft and the second right fixed shaft are threadedly connected or interference fit connected to the intermediate base.

4. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that The left rotating connecting frame and the right rotating connecting frame are respectively provided with long holes, the first left connecting arm and the first right connecting arm are respectively connected to the connecting shaft, and the connecting shaft and the long hole are movably connected and can slide back and forth along the long hole.

5. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that The torque module and the synchronous reverse rotation connection mechanism are respectively located on both sides of the virtual rotation center rotation connection structure.

6. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that The torque module is provided with a second left connecting arm and a second right connecting arm, and the second left connecting arm and the second right connecting arm are movably connected to the left rotating connecting frame and the right rotating connecting frame respectively, and can rotate synchronously with the left rotating connecting frame and the right rotating connecting frame respectively.

7. The hinge of the inward folding flexible screen mobile terminal according to claim 6, characterized in that The left rotating connecting frame and the right rotating connecting frame are respectively provided with long holes, the second left connecting arm and the second right connecting arm are respectively connected to the connecting shaft, and the connecting shaft and the long hole are movably connected and can slide back and forth along the long hole.

8. The hinge of the inward folding flexible screen mobile terminal according to claim 6, characterized in that The torque module is provided with a connecting seat, and the connecting seat and the intermediate base are connected by screws to form a mounting frame of the torque module. A second left fixed shaft and a second right fixed shaft are provided on the mounting frame, and the second left connecting arm and the second right connecting arm are rotatably connected to the second left fixed shaft and the second right fixed shaft respectively through a spring tube.

9. The hinge of the inward folding flexible screen mobile terminal according to claim 1, characterized in that Two first left connecting arms and two first right connecting arms are respectively provided in the axial direction, the end surface cams on the two first left connecting arms have opposite cam surfaces, and the end surface cams on the two first right connecting arms have opposite cam surfaces, and the middle sliding flat block is provided with corresponding left end surface sliding cams and right end surface sliding cams; The cooperation between the end face rotating cam and the end face sliding cam is a spiral end face cam cooperation.

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