Folding hinge structure and folding terminal device

Abstract

The present application provides a folding hinge structure and a folding terminal device. The folding hinge structure includes a main shaft, a main swing rod assembly, an inner folding swing rod assembly, an outer folding swing rod assembly, a middle frame assembly, and a locking member assembly. The inner folding swing rod assembly and the main shaft form a first virtual axis structure, and the outer folding swing rod assembly and the inner folding swing rod assembly form a second virtual axis structure. When the locking member assembly slides between the inner folding swing rod assembly and the outer folding swing rod assembly, the second virtual axis structure is locked, and the main swing rod assembly rotates relative to the main shaft to drive the middle frame assembly, the outer folding swing member assembly, and the inner folding swing member assembly to rotate. The inner folding swing rod assembly rotates around the main shaft until the locking member assembly slides between the inner folding swing rod assembly and the main shaft to lock the first virtual axis structure and unlock the second virtual axis structure, enabling the outer folding swing rod assembly to rotate relative to the inner folding swing rod assembly, and further driving the middle frame assembly to rotate continuously. By providing two virtual axes, the folding hinge structure has a simple structure and can achieve 360-degree flipping.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of terminals, and in particular, to a folding hinge structure and a folding terminal device. Background Art

[0002] Please refer to Figure 1 together. At present, diversified screens provide more application options for the intelligent product industry. In particular, the emergence of flexible screens has added more imagination space to the current highly homogeneous smartphone industry. Among various terminal products 300 equipped with flexible screens (such as folding mobile phones, folding tablets, folding computers and other electronic devices), the hinge mechanism for realizing the folding function of the flexible screen is a key component of such products.

[0003] Currently, the mainstream folding-type terminal products are roughly divided into two categories: inner folding and outer folding. However, these terminal products generally have the following problems:

[0004] (1) For products with one bending part, only single inner folding or outer folding can be realized, and their use is limited.

[0005] (2) For products that can simultaneously meet the functions of inner folding and outer folding, generally two bending parts are provided to realize inner folding and outer folding respectively, but such products cannot better protect the screen or make the product size too thick.

[0006] (3) For products using a solid shaft and a connecting rod structure to form a hinge structure or a bending part, there are problems such as a large number of parts and a complex structure. Summary of the Invention

[0007] In view of this, the present application provides a folding hinge structure and a folding terminal device. The folding hinge structure includes two virtual rotating shaft mechanisms, which has a simple structure and can simultaneously realize the functions of inner folding and outer folding.

[0008] In a first aspect, the present application provides a folding hinge structure, including a main shaft, on which a first receiving groove and a second receiving groove are provided at intervals; a main swing rod assembly, including a first main swing rod and a second main swing rod, distributed on both sides of the main shaft and rotatably connected to the main shaft; an inner folding swing rod assembly, which forms a first virtual axis structure with the main shaft, the inner folding swing rod assembly includes a first inner folding swing rod and a second inner folding swing rod, distributed on both sides of the main shaft, the first inner folding swing rod is arranged in the first receiving groove and can slide and rotate along the first receiving groove, the second inner folding swing rod is arranged in the second receiving groove and can slide and rotate along the second receiving groove; an outer folding swing rod assembly, which forms a second virtual axis structure with the inner folding swing rod assembly, the outer folding swing rod assembly includes a first outer folding swing rod and a second outer folding swing rod, one end of the first outer folding swing rod is arranged at the end of the first inner folding swing rod away from the first receiving groove and can slide and rotate relative to the first inner folding swing rod, one end of the second outer folding swing rod is arranged at the end of the second inner folding swing rod away from the second receiving groove and can slide and rotate relative to the second inner folding swing rod; a middle frame assembly, the middle frame assembly includes a first middle frame and a second middle frame, the end of the first outer folding swing rod away from the first inner folding swing rod is rotatably connected to the first middle frame, the end of the second outer folding swing rod away from the second inner folding swing rod is rotatably connected to the second middle frame, the end of the first main swing rod away from the main shaft is inserted into the first middle frame and can slide relative to the first middle frame, the end of the second main swing rod away from the main shaft is inserted into the second middle frame and can slide relative to the second middle frame; wherein, the axis of rotation of the main swing rod assembly relative to the main shaft, the axis of rotation of the inner folding swing rod assembly relative to the main shaft, and the axis of rotation of the outer folding swing rod assembly relative to the inner folding swing rod assembly are different and are all parallel to the length direction of the main shaft, and the direction of relative sliding between the middle frame assembly and the main swing rod assembly is perpendicular to the length direction of the main shaft; a locking member assembly, including a first locking member and a second locking member, the first locking member is arranged in the first inner folding swing rod and can slide relative to the first inner folding swing rod in a direction parallel to the length direction of the main shaft, the second locking member is arranged in the second inner folding swing rod and can slide relative to the second inner folding swing rod in a direction parallel to the length direction of the main shaft; when the locking member assembly slides between the inner folding swing rod assembly and the outer folding swing rod assembly, the second virtual axis structure is locked, and the main swing rod assembly rotates relative to the main shaft to drive the middle frame assembly, the outer folding swing rod assembly and the inner folding swing rod assembly to rotate, and the inner folding swing rod assembly rotates around the main shaft until the locking member assembly slides between the inner folding swing rod assembly and the main shaft to lock the first virtual axis structure and unlock the second virtual axis structure, so that the outer folding swing rod assembly rotates relative to the inner folding swing rod assembly, and then continues to drive the middle frame assembly to rotate.Obviously, the folding hinge structure can respectively control the flipping motion of the folding hinge structure from 0 degrees to 180 degrees and from 180 degrees to 360 degrees through two virtual axes (such as the first virtual axis structure and the second virtual axis structure), and perform the motion switching of the virtual axis at 180 degrees to achieve the 360-degree flipping of the mechanism. At the same time, the folding hinge structure realizes the constant length of the mechanism during the flipping process through the phase difference generated by the different positions of the rotation center of the main swing rod assembly and the axis center of the virtual axis. That is to say, the folding hinge structure realizes the 360-degree opening and closing of the mechanism through the combination of two virtual axis structures, and during the opening and closing process, the length of the mechanism remains consistent. Furthermore, the main motion mechanism of the folding hinge structure is two virtual axis structures, which have a simple structure and few parts.

[0009] In a possible design, the main shaft is in a straight bar shape, the first receiving groove and the second receiving groove are distributed along the axial direction of the main shaft, and a rotating part is formed between the first receiving groove and the second receiving groove. The first main swing rod and the second main swing rod are rotatably arranged on both sides of the rotating part. Obviously, in the above design, by rotatably arranging the first main swing rod and the second main swing rod on both sides of the rotating part, the main swing rod assembly can drive the middle frame assembly to perform 360-degree flipping. In addition, during the folding process, it can be ensured that at any angle, the screen length remains a constant length, reducing the pulling force of the folding hinge structure on the screen, which helps to extend the service life of the screen.

[0010] In a possible design, a first rotating hole and a second rotating hole are respectively arranged on both sides of the rotating part. One end of the first main swing rod is provided with a first pin shaft. By passing the first pin shaft through the first rotating hole, the first main swing rod is rotatably connected to one side of the rotating part. One end of the second main swing rod is provided with a second pin shaft. By passing the second pin shaft through the second rotating hole, the second main swing rod is rotatably connected to the other side of the rotating part; both the first pin shaft and the second pin shaft are arranged along the length direction parallel to the main shaft. Obviously, in the above design, by rotatably arranging the first main swing rod and the second main swing rod on both sides of the rotating part, the main swing rod assembly can drive the middle frame assembly to perform 360-degree flipping. In addition, during the folding process, it can be ensured that at any angle, the screen length remains a constant length, reducing the pulling force of the folding hinge structure on the screen, which helps to extend the service life of the screen.

[0011] In a possible design, the end walls on both sides of the first receiving groove are provided with first sliding grooves, the first sliding grooves are arc-shaped, and the two ends of the first inner folding swing rod are respectively provided with first protrusions, and the surface of the first protrusion is arc-shaped. By setting the first protrusion of the first inner folding swing rod in the first sliding groove, the first inner folding swing rod slides along the first sliding groove and rotates relative to the main shaft; the arc center of the first sliding groove is parallel to the length direction of the main shaft; the structure of the second receiving groove is the same as that of the first receiving groove, and the structure of the second inner folding swing rod is the same as that of the first inner folding swing rod. Obviously, in the above design, by setting the first inner folding swing rod and the second inner folding swing rod in the corresponding first receiving groove and the second receiving groove respectively, the inner folding swing rod assembly can be realized to slide and rotate relative to the main shaft, thereby driving the middle frame assembly to flip from 0 degrees to 180 degrees.

[0012] In a possible design, a notch is provided on the side of the first inner folding swing rod away from the main axis, and corresponding second sliding grooves are formed on both sides of the notch, and the second sliding grooves are arc-shaped. The first outer folding swing rod includes an arc-shaped portion, and corresponding second protrusions are formed at both ends of the arc-shaped portion, and the surface of the second protrusion is arc-shaped. The second protrusions at both ends of the arc-shaped portion are respectively arranged in the corresponding second sliding grooves, so that the first outer folding swing rod slides and rotates relative to the first inner folding swing rod; the arc center of the second sliding groove is parallel to the length direction of the main axis; the structure of the second outer folding swing rod is the same as that of the first outer folding swing rod. Obviously, in the above design, by making the first outer folding swing rod and the second outer folding swing rod slide and rotate relative to the inner folding swing rod assembly, the middle frame assembly is driven to flip 180 degrees to 360 degrees.

[0013] In a possible design, the first outer folding swing rod further includes a transition portion, one side of the transition portion is connected to an end of the arc portion away from the first inner folding swing rod, and the other side of the transition portion is further provided with a rotating shaft, and the first outer folding swing rod is rotatably connected to the first middle frame via the rotating shaft, and the rotating shaft is arranged along a length direction parallel to the main axis. In the above design, by rotatably connecting the first outer folding swing rod with the first middle frame, the first outer folding swing rod can be driven to rotate during the flipping of the first middle frame, thereby realizing 360-degree flipping and folding of the mechanism.

[0014] In a possible design, a transmission rod is further provided on the first inner folding swing rod. The transmission rod is arranged along the length direction parallel to the main shaft, and both ends are respectively arranged in corresponding second sliding grooves. The transmission rod is provided with first teeth. The second protrusion of the first outer folding swing rod is arranged in the gap between the transmission rod and the second sliding groove, and the inner arc surface of the first outer folding swing rod is provided with second teeth, and the first teeth and the second teeth are engaged with each other. In the above design, by providing the transmission rod, and the inner arc surfaces of the transmission rod and the first outer folding swing rod are provided with engaged teeth, the stability during flipping is effectively improved.

[0015] In a possible design, a sliding groove is provided on the first inner folding swing rod. The first locking member is arranged in the sliding groove and slides along the sliding groove. The direction in which the first locking member slides along the sliding groove is parallel to the length direction of the main shaft. The first locking member includes a locking portion, a first locking protrusion and a second locking protrusion. The first locking protrusion and the second locking protrusion are arranged at both ends of the locking portion and extend in opposite directions. Corresponding locking holes are further provided on the end walls on both sides of the first receiving groove. When the first locking member slides along the sliding groove and the first locking protrusion slides between the first inner folding swing rod and the first outer folding swing rod, the second virtual axis structure is locked, and the second locking protrusion abuts against the end wall of the first receiving groove. When the outer folding swing rod assembly drives the inner folding swing rod assembly to rotate relative to the main shaft and the second locking protrusion slides into the locking hole, the first virtual axis structure is locked, and the first locking protrusion slides out from between the first inner folding swing rod and the first outer folding swing rod, and the second virtual axis structure is unlocked, and the outer folding swing rod assembly slides and rotates relative to the inner folding swing rod assembly. In the above design, by providing the locking member assembly, the effective switching of the locking of the first virtual axis structure and the second virtual axis structure is realized.

[0016] In a possible design, the folding hinge structure further includes a support assembly. The support assembly is connected to the middle frame assembly and the main shaft to rotate with the middle frame assembly when the middle frame assembly rotates and realize the support for the flexible screen. In the above design, by providing the support assembly, the support assembly can rotate with the middle frame assembly and effectively support the flexible screen.

[0017] In a possible design, the support assembly includes a first support member and a second support member. One end of the first support member is disposed on one side of the main shaft and is rotatable relative to the main shaft. The end of the first support member facing away from the main shaft is disposed within the first middle frame and is slidable relative to the first middle frame. One end of the second support member is disposed on the other side of the main shaft and is rotatable relative to the main shaft. The end of the second support member facing away from the main shaft is disposed within the second middle frame and is slidable relative to the second middle frame. Wherein, the axis of rotation of the support assembly relative to the main shaft is parallel to the length direction of the main shaft, and the direction of relative sliding between the support assembly and the middle frame assembly is perpendicular to the length direction of the main shaft. In the above design, by providing the support assembly, the support assembly is a flat structure connected by pins. Through the setting of the virtual axis and the slideway structure, it can be made to be consistent with the screen when bent and flattened into a plane at 180 degrees.

[0018] In a possible design, the first support member includes a first plate body, a second plate body, a first connecting plate and a second connecting plate. The first plate body and the second plate body are arranged along the length direction of the main shaft. One end of the first plate body is rotatably connected to one end of the second plate body. The first connecting plate and the second connecting plate are disposed at the opposite ends of the first plate body and the second plate body. The first connecting plate is rotatably connected to the main shaft. The second connecting plate is inserted into the first middle frame and is slidable relative to the first middle frame. The structure of the second support member is the same as that of the first support member. The second support member is rotatably connected to the main shaft and is slidable relative to the second middle frame. In the above design, by providing the support assembly, the support assembly is a flat structure connected by pins. Through the setting of the virtual axis and the slideway structure, it can be made to be consistent with the screen when bent and flattened into a plane at 180 degrees.

[0019] In a possible design, the folding hinge structure further includes an appearance component. The appearance component is connected to the middle frame assembly and the main shaft to rotate with the middle frame assembly when the middle frame assembly rotates and to shield the folding hinge structure. In the above design, by providing the appearance component, the appearance component can rotate with the middle frame assembly and always shield the folding hinge structure.

[0020] In a possible design, the appearance component includes a first appearance part and a second appearance part, the first appearance part is arranged on one side of the main shaft, one end of the first appearance part is fixedly arranged at the bottom of the main shaft, the other end of the first appearance part is rotatably connected to the first middle frame, and the first middle frame can slide relative to the first appearance part along the length direction perpendicular to the main shaft; the second appearance part is arranged on the other side of the main shaft, one end of the second appearance part is fixedly arranged at the bottom of the main shaft, the other end of the second appearance part is rotatably connected to the second middle frame, and the second middle frame can slide relative to the second appearance part along the length direction perpendicular to the main shaft. In the above design, by setting the appearance component, the appearance component is a two-plate structure connected by pins, the side close to the main shaft is a rotatable structure, and the frame side close to the middle frame component is a slide structure, so that the back of the folding hinge structure can be shielded and protected at any angle.

[0021] In a possible design, the first appearance component includes a first flat plate and a second flat plate, one end of the first flat plate is arranged at the bottom of the main shaft, one end of the second flat plate is rotatably connected to the end of the first flat plate away from the main shaft, and is connected to the first middle frame, and can slide relative to the first middle frame; the structure of the second appearance component is the same as that of the first appearance component, one end of the second appearance component is arranged at the bottom of the main shaft, and the other end is connected to the second middle frame, and can slide relative to the second middle frame. In the above design, by setting the appearance component, the appearance component is a two-plate structure connected by a pin, the side close to the main shaft is a rotatable structure, and the frame side close to the middle frame component is a slide structure, so that the back of the folding hinge structure can be shielded and protected at any angle.

[0022] In a second aspect, the present application provides a folding terminal device, including a flexible screen, and the folding terminal device also includes the folding hinge structure described in the first aspect and its possible design; the flexible screen is connected to the first middle frame and the second middle frame, and covers the folding hinge structure.

[0023] The technical effects brought about by the second aspect can be found in the description related to the folding hinge structure involved in the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 Schematic diagram of various terminal products with flexible screens;

[0026] Figure 2 Schematic diagram of an unfolded folding hinge structure provided by an embodiment of the present application;

[0027] Figure 3 is Figure 2 Schematic diagram when the folding hinge structure shown realizes inner folding and flipping;

[0028] Figure 4 is Figure 2 Exploded schematic diagram of the folding hinge structure shown;

[0029] Figure 5 is Figure 4 Partial enlarged schematic diagram of the folding hinge structure shown;

[0030] Figure 6 is Figure 2 Schematic diagram of the main shaft in the folding hinge structure shown;

[0031] Figure 7 is Figure 2 Schematic diagram of the first inner folding swing rod in the folding hinge structure shown;

[0032] Figure 8 is Figure 2 Schematic diagram of the first inner folding swing rod installed on the main shaft in the folding hinge structure shown;

[0033] Figure 9 is Figure 2 Schematic diagram of the first outer folding swing rod in the folding hinge structure shown;

[0034] Figure 10 is Figure 2 Schematic diagram of the first outer folding swing rod installed on the first inner folding swing rod in the folding hinge structure shown;

[0035] Figure 11 is Figure 2 Schematic diagram of the first middle frame in the folding hinge structure shown;

[0036] Figure 12 is Figure 2 Schematic diagram of the first locking member in the folding hinge structure shown;

[0037] Figure 13a and Figure 13b is Figure 2 Schematic diagram of the outer folding swing rod assembly, inner folding swing rod assembly and main shaft when the folding hinge structure is in the first state (such as the closed state, unfolded 0 degrees);

[0038] Figure 13c andFigure 13d When Figure 2 the folding hinge structure is in the second state (for example, the flattened state, unfolded 180 degrees), a schematic diagram of the outer folding swing rod assembly, the inner folding swing rod assembly, and the main shaft;

[0039] Figure 13e When Figure 2 the folding hinge structure is in the third state (for example, the fully unfolded state, unfolded 360 degrees), a schematic diagram of the outer folding swing rod assembly, the inner folding swing rod assembly, and the main shaft;

[0040] Figure 14 When Figure 2 a schematic diagram of the first support member in the shown folding hinge structure;

[0041] Figure 15 When Figure 2 a schematic diagram of the first appearance member in the shown folding hinge structure;

[0042] Figures 16a to 16d When Figure 2 a schematic diagram when the folding hinge structure rotates from 0 degrees to 180 degrees;

[0043] Figures 17a to 17c When Figure 2 a schematic diagram when the folding hinge structure rotates from 180 degrees to 360 degrees;

[0044] Figures 18a to 18c Schematic diagrams of a folding terminal device provided with a folding hinge structure in different states respectively.

[0045] Description of main component symbols

[0046]

[0047]

[0048]

[0049] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0050] In order to further elaborate on the technical means and effects adopted by the present application to achieve the intended application purpose, the following, in conjunction with the drawings and embodiments, makes a detailed description of the specific embodiments, structures, features, and effects of the folding hinge structure and the folding terminal device provided by the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0051] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] At present, diverse screens provide more application options for the smart product industry. In particular, the emergence of flexible screens has added more imagination space to the current highly homogeneous smartphone industry. Among various terminal products equipped with flexible screens (such as electronic devices like folding mobile phones, folding tablets, folding computers, etc.), the hinge mechanism for realizing the folding function of the flexible screen is a key component of such products.

[0054] Currently, the mainstream folding-type terminal products are roughly divided into two categories: inner folding and outer folding. However, these terminal products generally have the following problems:

[0055] (1) For products with one bending part, only single inner folding or outer folding can be achieved, and their use is limited.

[0056] (2) For products that can simultaneously meet the inner folding and outer folding functions, generally two bending parts are provided to achieve inner folding and outer folding respectively, but such products cannot better protect the screen or make the product size too thick.

[0057] (3) For products using a solid shaft and a connecting rod structure to form a hinge structure or a bending part, there are problems such as a large number of parts and a complex structure.

[0058] Therefore, this application provides a folding hinge structure and a folding terminal device. The folding hinge structure includes two virtual axis structures, which have a simple structure and can simultaneously achieve inner folding and outer folding functions.

[0059] For the convenience of understanding, the following will describe it in detail in combination with the drawings and specific implementation manners.

[0060] Please refer to Figure 2 and Figure 3, this application provides a folding hinge structure 100. The folding hinge structure 100 can achieve inward folding and flipping (for example, opening and closing from 0 degrees to 180 degrees) and outward folding and flipping (for example, opening and closing from 180 degrees to 360 degrees), so as to achieve its 360-degree flipping and folding. The folding hinge structure 100 can be applied to a folding terminal device 200 (see Figures 18a to 18c ). The folding terminal device 200 can be at least one of a folding mobile phone, a folding tablet, a folding computer, a folding notebook, a terminal equipped with a flexible folding display screen, etc., and no specific limitation is made here.

[0061] Please refer to Figures 18a to 18c . The folding terminal device 200 further includes a flexible screen 201. The flexible screen 201 covers the folding hinge structure 100 and can be flipped and folded under the drive of the folding hinge structure 100. Among them, the folding terminal device 200 can be opened from 0 degrees to 360 degrees. That is, the folding terminal device 200 can achieve inward folding and flipping (for example, opening and closing from 0 degrees to 180 degrees) and outward folding and flipping (for example, opening and closing from 180 degrees to 360 degrees), so as to achieve its 360-degree flipping and folding.

[0062] Please refer to together Figure 3 . The folding hinge structure 100 includes a main shaft 10, a main swing rod assembly 20, an inward folding swing rod assembly 30, an outward folding swing rod assembly 40, a middle frame assembly 50, a locking member assembly 60, a support assembly 70 and an appearance assembly 80. The main swing rod assembly 20 is rotatably arranged on the main shaft 10. The inward folding swing rod assembly 30 is slidably arranged on the main shaft 10 and can rotate relative to the main shaft 10. The outward folding swing rod assembly 40 is slidably arranged at one end of the inward folding swing rod assembly 30 away from the main shaft 10 and can rotate relative to the inward folding swing rod assembly 30. The middle frame assembly 50 is rotatably connected to the outward folding swing rod assembly 40 and slidably connected to the main swing rod assembly 20. The inward folding swing rod assembly 30 and the main shaft 10 form a first virtual axis structure. The outward folding swing rod assembly 40 and the inward folding swing rod assembly 30 form a second virtual axis structure. The locking member assembly 60 is arranged in the inward folding swing rod assembly 30 and can slide relative to the inward folding swing rod assembly 30. The locking member assembly 60 is used to realize the locking and switching of the first virtual axis structure and the second virtual axis structure. The support assembly 70 is arranged inside the folding hinge structure 100. The support assembly 70 is connected to the main shaft 10 and the middle frame assembly 50 and supports the flexible screen 201. The appearance assembly 80 is arranged outside the folding hinge structure 100 to protect the folding hinge structure 100 and beautify the appearance of the folding terminal device 200.

[0063] Please refer to together Figure 4 , Figure 5 andFigure 6 , the main shaft 10 is roughly shaft-shaped. The main shaft 10 is provided with a first receiving groove 11 and a second receiving groove 12. The first receiving groove 11 and the second receiving groove 12 are arranged at intervals to accommodate the inner folding swing rod assembly 30. The first receiving groove 11 and the second receiving groove 12 divide the main shaft 10 into a rotating part 13, a connecting part 15 and a fixing part 17 arranged at intervals. Among them, the part between the first receiving groove 11 and the second receiving groove 12 forms the rotating part 13. The rotating part 13 is used to connect the main swing rod assembly 20. The connecting part 15 is arranged on the side of the first receiving groove 11 away from the rotating part 13. The fixing part 17 is arranged on the side of the second receiving groove 12 away from the rotating part 13. That is, in the present application, the connecting part 15, the first receiving groove 11, the rotating part 13, the second receiving groove 12 and the fixing part 17 are arranged in sequence along the axial direction (or length direction) of the main shaft 10.

[0064] The main swing arm assembly 20 includes a first main swing arm 21 and a second main swing arm 22. The first main swing arm 21 and the second main swing arm 22 are distributed on both sides of the main shaft 10 and are rotatably connected to the main shaft 10 (for example, rotatably connected via the rotating portion 13) so as to be unfolded or folded relative to the main shaft 10.

[0065] Specifically, see Figure 5 , a first rotation hole 131 is provided on a first side of the rotating part 13 along the length direction of the main shaft 10. The first main swing arm 21 is in a plate shape, and a first pin shaft 211 is provided on one side thereof. By passing the first pin shaft 211 through the first rotation hole 131 on one side of the rotating part 13, the first main swing arm 21 is rotatably connected to one side of the rotating part 13. Similarly, a second rotation hole 132 is provided on a second side of the rotating part 13 opposite to the first side along the length direction of the main shaft 10. The structure of the second main swing arm 22 is the same as that of the first main swing arm 21. A second pin shaft 221 is provided on one side of the second main swing arm 22. By passing the second pin shaft 221 through the second rotation hole 132 on the second side of the rotating part 13, the second main swing arm 22 is rotatably connected to the other side of the rotating part 13. In the present application, the axis of rotation of the main swing arm assembly 20 around the main shaft 10 (e.g., the first pin shaft 211 and the second pin shaft 221) is parallel to the length direction of the main shaft 10.

[0066] Please also read Figure 4 , Figure 5 and Figure 7The inner folding swing rod assembly 30 includes a first inner folding swing rod 31 and a second inner folding swing rod 32. The first inner folding swing rod 31 is slidably disposed in the first receiving groove 11 and can rotate relative to the main shaft 10.

[0067] For details, please refer to Figure 5 and Figure 6 , the end walls on both sides of the first receiving groove 11 (for example, the end of the rotating part 13 and the connecting part 15 facing the first receiving groove 11) are both provided with a first sliding groove 111. The first sliding groove 111 is arc-shaped. The first inner folding swing rod 31 is roughly arc-shaped. The first protrusions 311 are respectively provided at both ends of the first inner folding swing rod 31. The shape and structure of the first protrusion 311 match the shape and structure of the first sliding groove 111. For example, the surface of the first protrusion 311 is arc-shaped. Please refer to Figure 8 , by setting the first protrusion 311 of the first inner folding swing rod 31 in the first sliding groove 111, the first inner folding swing rod 31 is set in the first receiving groove 11 and can slide along the first sliding groove 111. In addition, since the first sliding groove 111 and the first protrusion 311 are both arc-shaped. Therefore, when the first inner folding swing rod 31 slides along the first sliding groove 111, the first inner folding swing rod 31 can rotate relative to the main shaft 10.

[0068] The second inner folding swing rod 32 is disposed in the second receiving groove 12, and can slide along the second receiving groove 12 and rotate relative to the main shaft 10. In the present application, the structure of the second inner folding swing rod 32 is the same as that of the first inner folding swing rod 31, and its sliding and rotating principles are similar to those of the first inner folding swing rod 31, which will not be repeated here.

[0069] Please also read Figure 4 , Figure 5 and Figure 9 The outer folding swing rod assembly 40 includes a first outer folding swing rod 41 and a second outer folding swing rod 42. The first outer folding swing rod 41 is slidably disposed at one end of the first inner folding swing rod 31 away from the main shaft 10, and can rotate relative to the first inner folding swing rod 31.

[0070] For details, please refer to Figure 5 and Figure 6, a notch 312 is provided on the side of the first inner folding swing rod 31 away from the main shaft 10. Corresponding second sliding grooves 313 are formed on both sides of the notch 312. The second sliding groove 313 is arc-shaped. The first outer folding swing rod 41 includes an arc-shaped portion 411 and a transition portion 412. The arc-shaped portion 411 is semicircular. Corresponding second protrusions 413 are formed at both ends of the arc-shaped portion 411. The surface of the second protrusion 413 is roughly arc-shaped. Please refer to Figure 10 , by respectively setting the second protrusions 413 at both ends of the arc-shaped portion 411 in the corresponding second sliding grooves 313, the first outer folding swing rod 41 can slide relative to the first inner folding swing rod 31. Since the second sliding groove 313 and the second protrusion 413 are both arc-shaped, when the first outer folding swing rod 41 slides relative to the first inner folding swing rod 31, the first outer folding swing rod 41 can also rotate relative to the first inner folding swing rod 31.

[0071] The adapter portion 412 is generally plate-shaped, and one side of the adapter portion 412 is connected to an end of the arc portion 411 away from the first inner folding swing rod 31. A rotating shaft 414 is also disposed on the other side of the adapter portion 412. The rotating shaft 414 is disposed along a length direction parallel to the main shaft 10.

[0072] Understandable, please refer to Figure 9 In order to ensure the stability of the outward folding and flipping, a transmission rod 314 is provided on the first inner folding swing rod 31. The transmission rod 314 is arranged along the length direction parallel to the main shaft 10, and the two ends are respectively arranged in the corresponding second sliding grooves 313. The transmission rod 314 has a first tooth 315. Correspondingly, the second protrusion 413 of the first outer folding swing rod 41 is arranged in the gap between the transmission rod 314 and the second sliding groove 313, and the second tooth 415 is arranged on the inner arc surface of the first outer folding swing rod 41. In this way, when the first outer folding swing rod 41 rotates around the transmission rod 314, the mutual engagement of the first tooth 315 and the second tooth 415 can effectively improve the stability during flipping.

[0073] The second outer folding swing arm 42 is slidably disposed at one end of the second inner folding swing arm 32 away from the main shaft 10, and can rotate relative to the second inner folding swing arm 32. In the present application, the structure of the second outer folding swing arm 42 is the same as that of the first outer folding swing arm 41, and the principle of its sliding and rotating relative to the second inner folding swing arm 32 is similar to that of the first outer folding swing arm 41, which will not be repeated here.

[0074] Please also read Figure 4 and Figure 11, the middle frame assembly 50 is connected to the flexible screen 201 to drive the flexible screen 201 to flip during the flipping process. The middle frame assembly 50 includes a first middle frame 51 and a second middle frame 52. The first middle frame 51 is generally in a straight strip shape and is arranged along the length direction of the main shaft 10. A first receiving opening 511 is provided on one side of the first middle frame 51. The first receiving opening 511 is used to receive the first main swing rod 21 and can enable the first main swing rod 21 to slide along the first receiving opening 511, that is, to realize the relative sliding between the first main swing rod 21 and the first middle frame 51. A second receiving opening 512 is further provided on the side of the first middle frame 51 where the first receiving opening 511 is provided. A shaft hole (not shown in the figure) is provided in the second receiving opening 512. By passing the rotating shaft 414 of the first outer folding swing rod 41 through the shaft hole in the second receiving opening 512, the first middle frame 51 is rotatably connected to the first outer folding swing rod 41. A third receiving opening 513 is further provided on the side of the first middle frame 51 where the first receiving opening 511 and the second receiving opening 512 are provided. The first receiving opening 511, the second receiving opening 512, and the third receiving opening 513 are spaced apart.

[0075] It can be understood that in the present application, the relative sliding direction between the first middle frame 51 and the first main swing rod 21 is perpendicular to the length direction of the main shaft 10. The axis of rotation of the first middle frame 51 and the first outer folding swing rod 41 (such as the rotating shaft 414) is parallel to the length direction of the main shaft 10.

[0076] The second middle frame 52 is slidably connected to the second main swing rod 22 and is rotatably connected to the second outer folding swing rod 42. In the present application, the structure of the second middle frame 52 is the same as that of the first middle frame 51, and the principle of its rotational connection with the second outer folding swing rod 42 and sliding connection with the second main swing rod 22 is similar to the principle of the first middle frame 51's rotational connection with the first outer folding swing rod 41 and sliding connection with the first main swing rod 21, and will not be elaborated here.

[0077] It can be understood that please refer to Figure 4 , Figure 5 and Figure 12 , the locking member assembly 60 includes a first locking member 61 and a second locking member 62. The first locking member 61 is disposed in the first inner folding swing rod 31 and can slide relative to the first inner folding swing rod 31.

[0078] Specifically, in the embodiments of the present application, the number of the first locking members 61 is two. Corresponding chutes 316 are provided on both sides of the first inner folding swing rod 31. The shape and structure of the chute 316 correspond to those of the first locking member 61. The two first locking members 61 are respectively arranged on both sides of the first inner folding swing rod 31 (such as the chute 316) and can slide along the chute 316. In the present application, the sliding direction of the first locking member 61 along the chute 316 is parallel to the length direction of the main shaft 10.

[0079] Please refer to Figure 12 , the first locking member 61 includes a locking portion 611, a first locking protrusion 612 and a second locking protrusion 613. The locking portion 611 is generally strip-shaped. The first locking protrusion 612 and the second locking protrusion 613 are arranged at both ends of the locking portion 611 and extend in opposite directions. Correspondingly, in the present application, locking holes 112 (refer to Figure 5 ) are respectively provided on the end walls on both sides of the first receiving groove 11 (such as the rotating portion 13 and the connecting portion 15). Thus, please refer to Figure 13a and Figure 13b , when the first locking member 61 slides along the chute 316 and the first locking protrusion 612 slides between the first inner folding swing rod 31 and the first outer folding swing rod 41, the second virtual axis structure is locked (i.e., the first inner folding swing rod 31 and the first outer folding swing rod 41 are locked). At this time, the second locking protrusion 613 will abut against the end wall of the first receiving groove 11 (such as abutting against the side walls of the rotating portion 13 and the connecting portion 15). When the main swing rod assembly 20 drives the middle frame assembly 50, the outer folding swing rod assembly 40 and the inner folding swing rod assembly 30 to rotate, the outer folding swing rod assembly 40 drives the inner folding swing rod assembly 30 to rotate relative to the main shaft 10, so that the folding hinge structure 100 rotates from 0 degree to 180 degrees (refer to Figure 13c and Figure 13d ).

[0080] Please refer to Figures 13c to 13e , when the outer folding swing rod assembly 40 drives the inner folding swing rod assembly 30 to rotate relative to the main shaft 10 and the second locking protrusion 613 slides into the locking hole 112, the first virtual axis structure is locked (i.e., the first inner folding swing rod 31 and the main shaft 10 are locked, refer to Figure 13c and Figure 13d)。And the first locking protrusion 612 slides out from between the first inner folding swing rod 31 and the first outer folding swing rod 41, and the second virtual axis structure is unlocked. At this time, the main swing rod assembly 20 continues to rotate, driving the outer folding swing rod assembly 40 to rotate relative to the inner folding swing rod assembly 30, that is, continuing to drive the middle frame assembly 50 to rotate until the folding hinge structure 100 rotates from 180 degrees to 360 degrees (see Figure 13e )。

[0081] It can be understood that the second locking member 62 is disposed inside the second inner folding swing rod 32 and can slide relative to the second inner folding swing rod 32. In this application, the second locking member 62 and the first locking member 61 have the same structure, and their functions and working principles are similar to those of the first locking member 61, and will not be elaborated here.

[0082] It can be understood that please refer to Figure 4 and Figure 14 , the support assembly 70 is disposed inside the folding terminal device 200 to support the flexible screen 201 during the process of the middle frame assembly 50 driving the flexible screen 201 to flip (see Figures 18a to 18c )。The support assembly 70 includes a first support member 71 and a second support member 72. One end of the first support member 71 is rotatably connected to the main shaft 10, and the other end is slidably connected to the first middle frame 51.

[0083] Specifically, the first support member 71 includes a first plate body 711, a second plate body 712, a first connecting plate 713, and a second connecting plate 714. Both the first plate body 711 and the second plate body 712 are straight bars and are arranged along the length direction of the main shaft 10. One end of the first plate body 711 is rotatably connected to the second plate body 712. That is, the first plate body 711 and the second plate body 712 can rotate relative to each other. The first connecting plate 713 is disposed on a side of the first plate body 711 away from the second plate body 712 and is rotatably connected to the connecting portion 15 of the main shaft 10. That is, the first support member 71 is rotatably connected to one side of the main shaft 10 through the first connecting plate 713. The axis of rotation of the first support member 71 around the main shaft 10 is parallel to the length direction of the main shaft 10. The second connecting plate 714 is disposed on a side of the second plate body 712 away from the first connecting plate 713. The second connecting plate 714 is disposed within the first middle frame 51 (for example, inserted into the third receiving opening 513 of the first middle frame 51) and can slide relative to the first middle frame 51. The direction of relative sliding between the first support member 71 and the first middle frame 51 is perpendicular to the length direction of the main shaft 10. Thus, when the main swing rod assembly 20 rotates relative to the main shaft 10, the main swing rod assembly 20 drives the middle frame assembly 50 to rotate. Since the first support member 71 is connected to the first middle frame 51 and is provided with a rotating mechanism, the first support member 71 can also rotate with the first middle frame 51 and achieve full-course support for the flexible screen 201.

[0084] The second support member 72 is disposed on the other side of the main shaft 10, and its structure is the same as that of the first support member 71. The positional relationship, connection relationship, function, and principle of the second support member 72 with respect to the main shaft 10 and the second middle frame 52 are similar to those of the first support member 71 and will not be described in detail here.

[0085] Please refer to Figure 4 and Figure 15 , the appearance component 80 is disposed on the outer side of the folding terminal device 200 and is used to protect the folding hinge structure 100 and beautify the appearance of the folding terminal device 200 (see Figures 18a to 18c ). The appearance component 80 includes a first appearance member 81 and a second appearance member 82. The first appearance member 81 includes a first flat plate 811 and a second flat plate 812. The first flat plate 811 is arranged along the length direction of the main shaft 10, and one end thereof is fixed to the main shaft 10. For example, one side of the first flat plate 811 is fixed to the main shaft 10 through a pin 813 (see Figure 16a)It is fixed to the main shaft 10. The second flat plate 812 is arranged along the length direction of the main shaft 10 and is rotatably connected to the first flat plate 811. That is, one end of the second flat plate 812 is rotatably connected to the side of the first flat plate 811 away from the main shaft 10. The side of the second flat plate 812 away from the main shaft 10 is slidably connected to the first middle frame 51. In the embodiment of the present application, the relative sliding direction of the first middle frame 51 and the second flat plate 812 is perpendicular to the length direction of the main shaft 10.

[0086] The second appearance member 82 is arranged on the other side of the main shaft 10. The structure of the second appearance member 82 is the same as that of the first appearance member 81, and its connection relationship, positional relationship, function and principle with the main shaft 10 and the second middle frame 52 are similar to those of the first appearance member 81, and will not be elaborated here.

[0087] It can be understood that in the present application, by setting the appearance component 80 into a flip structure and being able to make relative parallel sliding with the middle frame component 50, the appearance component 80 always shields the folding hinge structure 100 during the flipping process of the middle frame component 50.

[0088] It can be understood, please refer to Figure 4 and Figure 5, when assembling the folding hinge structure 100, the first main swing rod 21 can be first connected to the first rotation hole 131 of the rotating part 13 to be rotatably arranged on the first side of the main shaft 10. Then, the first inner folding swing rod 31 is arranged in the first receiving groove 11 so that the first inner folding swing rod 31 slides and rotates relative to the main shaft 10. The first outer folding swing rod 41 is rotatably arranged at one end of the first inner folding swing rod 31 away from the main shaft 10. The rotating shaft 414 of the first outer folding swing rod 41 passes through the second receiving opening 512 of the first middle frame 51, and the first main swing rod 21 is inserted into the first receiving opening 511 to rotatably connect the first outer folding swing rod 41 to the first middle frame 51 and slidably connect the first main swing rod 21 to the first middle frame 51. One end of the first support member 71 (such as the first connecting plate 713) is rotatably connected to the connecting part 15 of the main shaft 10, and the other end of the first support member 71 (such as the second connecting plate 714) is slidably arranged in the third receiving opening 513 of the first middle frame 51 so that the first support member 71 connects the main shaft 10 and the first middle frame 51. One end of the first appearance member 81 is fixed to the main shaft 10, for example, fixed to the bottom of the main shaft 10. The other end of the first appearance member 81 (such as the second flat plate 812) is connected to the outside of the first middle frame 51, and the first middle frame 51 and the first appearance member 81 can slide relative to each other. In this way, the assembly of the first main swing rod 21, the first inner folding swing rod 31, the first outer folding swing rod 41, the first middle frame 51, the first support member 71 and the first appearance member 81 with the main shaft 10 can be completed, that is, they are all assembled to the first side of the main shaft 10. Then, in a similar manner, the assembly of the second main swing rod 22, the second inner folding swing rod 32, the second outer folding swing rod 42, the second middle frame 52, the second support member 72 and the second appearance member 82 with the main shaft 10 can be completed to assemble them to the second side of the main shaft 10.

[0089] It can be understood that please refer to Figures 16a to 16d , which is a schematic diagram of the folding hinge structure 100 in the unfolded state from 0 degrees to 180 degrees. Among them, in the present application, the left-side movement is taken as an example for illustration. First, in the initial state, the locking member assembly 60 is located between the outer folding swing rod assembly 40 and the inner folding swing rod assembly 30. Specifically, please refer to Figure 16b, when the first locking member 61 slides along the chute 316 and the first locking protrusion 612 slides between the first inner folding swing rod 31 and the first outer folding swing rod 41 (for example, the recess 416 of the first outer folding swing rod 41, that is, straddling the first locking surface), the second virtual axis structure is locked (i.e., the first inner folding swing rod 31 and the first outer folding swing rod 41 are fixed together), and the second locking protrusion 613 will abut against the side wall of the first receiving groove 11 and be restricted from moving leftward. That is, when the second virtual axis structure is locked, the first virtual axis structure can move (for example, the first inner folding swing rod 31 rotates relative to the main shaft 10). When the inner folding swing rod assembly 30 rotates, the recess 416 of the outer folding swing rod assembly 40 will push the locking member assembly 60 and the inner folding swing rod assembly 30 to rotate together. Specifically, a part of the first protrusion 311 of the inner folding swing rod assembly 30 extends into the first sliding groove 111 of the main shaft 10 to overlap with the main shaft 10.

[0090] When the folding hinge structure 100 is unfolded, the main swing rod assembly 20 swings around the rotating part 13 to drive the middle frame assembly 50, the outer folding swing rod assembly 40 and the inner folding swing rod assembly 30 to rotate. The arc-shaped first protrusion 311 on the inner folding swing rod assembly 30 slides along the arc-shaped first sliding groove 111 of the main shaft 10 until the folding hinge structure 100 realizes an inward folding flip from 0 degrees to 180 degrees (see Figure 16d ).

[0091] At the same time, please also refer to Figure 16c , which is a cross-sectional view of the initial state of the second virtual axis structure. Among them, a part of the arc-shaped second protrusion 413 of the first outer folding swing rod 41 extends into the arc-shaped second sliding groove 313 of the first inner folding swing rod 31. Since the outer folding swing rod assembly 40 and the inner folding swing rod assembly 30 are locked together by the locking member assembly 60 from 0 degrees to 180 degrees, that is, they are always in a locked state. Therefore, the outer folding swing rod assembly 40 and the inner folding swing rod assembly 30 will maintain the state as shown in Figure 16c and rotate together from 0 degrees to 180 degrees.

[0092] Please also refer to Figure 16d , during the unfolding process, the support assembly 70 and the appearance assembly 80 flip and unfold along with the main swing rod assembly 20 until they are flattened at 180 degrees, and the screen support function and the mechanism appearance protection function are realized during the unfolding process. Furthermore, due to the rotational displacement difference formed by the different positions of the arc center of the first sliding groove 111 and the rotation center or axis of the main swing rod assembly 20, the relative sliding between the middle frame assembly 50 and the main swing rod assembly 20 is realized to keep the length of the folding hinge structure 100 always consistent with the length of the screen installed on the folding hinge structure 100 (seeFigure 16d As shown, the relative sliding distance between the middle frame assembly 50 and the main swing rod assembly 20).

[0093] Please refer to Figures 17a to 17c , which is a schematic diagram of the folding hinge structure 100 in the unfolded state from 180 degrees to 360 degrees. Among them, in this application, the left-side movement is taken as an example for illustration. When the folding hinge structure 100 is unfolded to 180 degrees, the second locking protrusion 613 in the locking member assembly 60 slides into the locking hole 112 (i.e., across the second locking surface) under the extrusion of the outer folding swing rod assembly 40. At this time, the first locking protrusion 612 slides out from between the inner folding swing rod assembly 30 and the outer folding swing rod assembly 40. The first virtual axis structure formed by the inner folding swing rod assembly 30 and the main shaft 10 is locked, while the second virtual axis structure formed by the inner folding swing rod assembly 30 and the outer folding swing rod assembly 40 is unlocked. In this way, the main swing rod assembly 20 continues to rotate, and drives the outer folding swing rod assembly 40 to rotate relative to the inner folding swing rod assembly 30, that is, continues to drive the middle frame assembly 50 to rotate until the folding hinge structure 100 rotates from 180 degrees to 360 degrees.

[0094] It can be understood that during the process of the folding hinge structure 100 rotating from 180 degrees to 360 degrees, due to the rotational displacement difference formed by the different positions of the arc center of the second sliding groove 313 and the rotation center or axis of the main swing rod assembly 20, the relative sliding between the middle frame assembly 50 and the main swing rod assembly 20 is realized, so as to keep the length of the folding hinge structure 100 always consistent with the length of the screen fixed on the folding hinge structure 100 (refer to Figure 17c As shown, the relative sliding distance between the middle frame assembly 50 and the main swing rod assembly 20).

[0095] It can be understood that during the unfolding process, the support assembly 70 will be bent under the drive of the main swing rod assembly 20 during the flipping process to maintain the support for the screen. The appearance assembly 80 is folded and rotated inward and retracted along with the flipping of the main swing rod assembly 20 to be attached to the inside of the folding hinge structure 100, realizing the function of protecting the appearance of the mechanism.

[0096] It can be understood that as described above, between 0 degrees (inner folding state) and 180 degrees (flattened state) of the folding hinge structure 100, the first virtual axis structure rotates and the second virtual axis structure is locked. At 180 degrees, through the position sliding of the locking member assembly 60, the first virtual axis structure is locked and the second virtual axis structure is unlocked at the same time. Between 180 degrees and 360 degrees (outer folding state), the second virtual axis structure rotates and the first virtual axis structure is locked.

[0097] It can be understood that the movement from the outward folding state to the inward folding state is the reverse movement of the above, and the locking switch of the first virtual axis structure and the second virtual axis structure is also performed at the 180-degree node, which will not be elaborated here.

[0098] In summary, the folding hinge structure 100 controls the flipping movement of the folding hinge structure 100 from 0 degrees to 180 degrees and from 180 degrees to 360 degrees through two virtual axes (such as the first virtual axis structure and the second virtual axis structure), and performs the movement switch of the virtual axis at 180 degrees to achieve a 360-degree flip of the mechanism. At the same time, the folding hinge structure 100 realizes that the length of the mechanism remains unchanged during the flipping process through the phase difference generated by the different positions of the rotation center of the main swing rod assembly 20 and the axis center of the virtual axis. That is to say, the folding hinge structure 100 realizes the 360-degree opening and closing of the mechanism (i.e., the folding hinge structure 100) through the combination of two virtual axis structures, and during the opening and closing process, the length of the mechanism remains consistent.

[0099] In addition, the folding hinge structure 100 realizes the functions of inward folding and outward folding of the mechanism simultaneously at one bending part (i.e., the first virtual axis structure and the second virtual axis structure). The action switching mechanism is a slidable locking part assembly 60 arranged in the inward folding swing rod assembly 30. In this application, the virtual axis structures (i.e., the first virtual axis structure and the second virtual axis structure) at two places on one side of the folding hinge structure 100 each control a 180-degree flipping range and are switched at 180 degrees as the critical point. Furthermore, by setting the support assembly 70 and the appearance assembly 80 as the above structures, the support and protection of the screen can be always maintained and the internal structure of the hinge can be always shielded.

[0100] It can be understood that in this application, the numbers of the first receiving groove 11 and the second receiving groove 12, the numbers of the main swing rod assembly 20, the inward folding swing rod assembly 30 and the outward folding swing rod assembly 40 are not specifically limited. For example, please refer back to Figure 4 , in another embodiment, two first receiving grooves 11 and two second receiving grooves 12 can be provided on the main shaft 10. The folding hinge structure 100 includes two main swing rod assemblies 20, two inward folding swing rod assemblies 30 and two outward folding swing rod assemblies 40.

[0101] Please refer to Figures 18a to 18c together, which is a schematic diagram of the folding terminal device 200 in different states. For example, Figure 18a is a schematic diagram of the folding terminal device 200 in the inward folding and closed state. Figure 18b is a schematic diagram of the folding terminal device 200 in the 180-degree unfolded state. Figure 18c is a schematic diagram of the folding terminal device 200 in the 360-degree outward folding state.

[0102] Obviously, the length of the folding hinge structure 100 remains unchanged during the flipping process by means of the phase difference generated by the different positions of the rotation center of the main swing rod assembly 20 and the axis of the virtual axis (such as the first virtual axis structure and the second virtual axis structure). That is, no matter what state the folding hinge structure 100 is in, the support assembly 70 can effectively support the flexible screen 201, and the appearance assembly 80 can protect the appearance of the folding hinge structure 100, that is, the appearance assembly 80 always shields the internal structure of the folding hinge structure 100.

[0103] It can be understood that the present application provides a folding hinge structure 100 and a folding terminal device 200. The folding hinge structure 100 is a mechanism with two virtual rotating shaft combinations, which can combine the functions of inner folding and outer folding at one bending part, improving the stability of the folding hinge structure 100 and keeping the length of the folding hinge structure 100 consistent to protect the screen. Specifically, the folding hinge structure 100 is configured with two virtual axis structures (i.e., the first virtual axis structure and the second virtual axis structure) and a locking component assembly 60. In this way, at 180 degrees, the movement switching of the two virtual axis structures can be completed through the locking component assembly 60 to realize the 360-degree flipping action of the mechanism. Specifically, the folding hinge structure 100 realizes the movement conversion between the two virtual axis structures by sliding the locking component assembly 60 in the inner folding swing rod assembly 30.

[0104] Furthermore, in order to ensure the length change during outer folding, the folding hinge structure 100 utilizes the phase difference between the virtual axis (i.e., the first virtual axis structure and the second virtual axis structure) and the real axis (i.e., the axis of the main swing rod assembly 20), and realizes the adjustment and control of the length of the folding hinge structure 100 through the sliding between the virtual axis and the real axis. The folding hinge structure 100 is provided with a support assembly 70. The support assembly 70 is a flat structure connected by pins. Through the setting of the virtual axis and the slideway structure, it can be consistent with the screen during bending and flatten into a plane at 180 degrees. In addition, the folding hinge structure 100 is further provided with an appearance assembly 80. The appearance assembly 80 is a flat structure composed of two pins connected. The side close to the main shaft 10 is a rotatable structure, and the side close to the frame of the middle frame assembly 50 is a slideway structure. In this way, the back of the folding hinge structure 100 can be shielded and protected at any angle.

[0105] In summary, the folding hinge structure 100 has at least the following beneficial effects:

[0106] (1) Through two virtual axis structures, the inward folding and flipping (opening and closing from 0 degrees to 180 degrees) and outward folding and flipping (opening and closing from 180 degrees to 360 degrees) of the mechanism (i.e., the folding hinge structure 100) are respectively controlled, so as to realize the 360-degree flipping and folding of the mechanism.

[0107] (2) The integration of the inward folding function and the outward folding function can be realized at the same bending part.

[0108] (3) The length of the mechanism is always guaranteed to be consistent during the 360-degree opening and closing process.

[0109] (4) Through the position transformation of the locking member assembly 60, the motion switching between the two virtual axis structures is realized, ensuring that one virtual axis structure is locked when the other virtual axis structure is moving.

[0110] (5) The main motion mechanisms of the folding hinge structure 100 are two virtual axis structures, which have a simple structure and few parts.

[0111] It can be understood that the folding hinge structure 100 can be applied to all outward folding terminal devices and terminal devices combined therewith, including, but not limited to, terminal devices such as smart phones, tablet computers and laptop computers. The appearance of the rotating shaft area of the folding hinge structure 100 is extremely simple. It can not only realize the folding function, but also ensure that the screen length remains constant at any angle during the folding process, reducing the pulling force of the folding hinge structure 100 on the screen and helping to extend the service life of the screen. Moreover, the sliding distance of the folding hinge structure 100 corresponds uniquely to the rotation angle, which can prevent the screen from being squeezed in the width direction.

[0112] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application. Those skilled in the art can also make other changes within the spirit of the present application for use in the design of the present application, as long as they do not deviate from the technical effects of the present application. These changes made in accordance with the spirit of the present application should all be included within the scope claimed by the present application.

Claims

1. A folding hinge structure, characterized in that, include: A main shaft, wherein the main shaft is provided with a first receiving groove and a second receiving groove which are spaced apart from each other; A main swing arm assembly, comprising a first main swing arm and a second main swing arm, which are distributed on both sides of the main shaft and are rotatably connected to the main shaft; An inner folding swing rod assembly, which forms a first virtual axis structure with the main axis, and the inner folding swing rod assembly includes a first inner folding swing rod and a second inner folding swing rod, which are distributed on both sides of the main axis, the first inner folding swing rod is arranged in the first receiving groove, and can slide and rotate along the first receiving groove, and the second inner folding swing rod is arranged in the second receiving groove, and can slide and rotate along the second receiving groove; An outer folding swing rod assembly, which forms a second virtual axis structure with the inner folding swing rod assembly, wherein the outer folding swing rod assembly includes a first outer folding swing rod and a second outer folding swing rod, wherein one end of the first outer folding swing rod is disposed at one end of the first inner folding swing rod away from the first receiving groove, and can slide and rotate relative to the first inner folding swing rod, and one end of the second outer folding swing rod is disposed at one end of the second inner folding swing rod away from the second receiving groove, and can slide and rotate relative to the second inner folding swing rod; A middle frame assembly, the middle frame assembly comprising a first middle frame and a second middle frame, the first outer folding swing rod having one end away from the first inner folding swing rod being rotatably connected to the first middle frame, the second outer folding swing rod having one end away from the second inner folding swing rod being rotatably connected to the second middle frame, the first main swing rod having one end away from the main axis being inserted into the first middle frame and being able to slide relative to the first middle frame, the second main swing rod having one end away from the main axis being inserted into the second middle frame and being able to slide relative to the second middle frame; The axis of rotation of the main swing arm assembly relative to the main shaft, the axis of rotation of the inner folding swing arm assembly relative to the main shaft, and the axis of rotation of the outer folding swing arm assembly relative to the inner folding swing arm assembly are different and are parallel to the length direction of the main shaft, and the relative sliding direction of the middle frame assembly and the main swing arm assembly is perpendicular to the length direction of the main shaft; A locking member assembly, comprising a first locking member and a second locking member, wherein the first locking member is disposed in the first inner folding swing rod and can slide relative to the first inner folding swing rod in a direction parallel to the length direction of the main axis, and the second locking member is disposed in the second inner folding swing rod and can slide relative to the second inner folding swing rod in a direction parallel to the length direction of the main axis; When the locking member assembly slides between the inner folding rocker arm assembly and the outer folding rocker arm assembly, the second virtual axis structure is locked, and the main rocker arm assembly rotates relative to the main axis to drive the middle frame assembly, the outer folding rocker arm assembly and the inner folding rocker arm assembly to rotate, and the inner folding rocker arm assembly rotates around the main axis until the locking member assembly slides between the inner folding rocker arm assembly and the main axis to lock the first virtual axis structure and unlock the second virtual axis structure, so that the outer folding rocker arm assembly rotates relative to the inner folding rocker arm assembly, thereby continuing to drive the middle frame assembly to rotate.

2. The folding hinge structure according to claim 1, wherein The main shaft is in a straight bar shape, the first receiving groove and the second receiving groove are distributed along the axial direction of the main shaft, and a rotating part is formed between the first receiving groove and the second receiving groove, and the first main swing rod and the second main swing rod are rotatably arranged on both sides of the rotating part.

3. The folding hinge structure according to claim 2, wherein, A first rotating hole and a second rotating hole are respectively provided at two sides of the rotating part, a first pin is provided at one end of the first main swing rod, and the first pin is passed through the first rotating hole so that the first main swing rod is rotatably connected to one side of the rotating part, and a second pin is provided at one end of the second main swing rod, and the second pin is passed through the second rotating hole so that the second main swing rod is rotatably connected to the other side of the rotating part; The first pin shaft and the second pin shaft are both arranged along a length direction parallel to the main axis.

4. The folding hinge structure according to claim 1, characterized in that, The end walls on both sides of the first receiving groove are provided with first sliding grooves, the first sliding grooves are arc-shaped, and the two ends of the first inner folding swing rod are respectively provided with first protrusions, the surface of the first protrusions is arc-shaped, and the first protrusions of the first inner folding swing rod are arranged in the first sliding grooves, so that the first inner folding swing rod slides along the first sliding grooves and rotates relative to the main shaft; The arc center of the first sliding groove is parallel to the length direction of the main axis; The structure of the second receiving groove is the same as that of the first receiving groove, and the structure of the second inner folding swing rod is the same as that of the first inner folding swing rod.

5. The folding hinge structure according to claim 4, wherein, A notch is provided on one side of the first inner folding swing rod away from the main axis, and corresponding second sliding grooves are formed on both sides of the notch, and the second sliding grooves are arc-shaped. The first outer folding swing rod includes an arc-shaped portion, and corresponding second protrusions are formed at both ends of the arc-shaped portion, and the surface of the second protrusion is arc-shaped. The second protrusions at both ends of the arc-shaped portion are respectively arranged in the corresponding second sliding grooves, so that the first outer folding swing rod slides and rotates relative to the first inner folding swing rod; The arc center of the second sliding groove is parallel to the length direction of the main axis; The structure of the second outward folding swing arm is the same as that of the first outward folding swing arm.

6. The folding hinge structure according to claim 5, wherein, The first outer folding rocker arm also includes a transition portion, one side of the transition portion is connected to an end of the arc portion away from the first inner folding rocker arm, and the other side of the transition portion is also provided with a rotating shaft, and the first outer folding rocker arm is rotatably connected to the first middle frame via the rotating shaft, and the rotating shaft is arranged along a length direction parallel to the main axis.

7. The folding hinge structure according to claim 5, characterized in that, A transmission rod is also provided on the first inner folding rocker arm. The transmission rod is arranged along the length direction parallel to the main axis, and both ends are respectively arranged in the corresponding second sliding grooves. The transmission rod is provided with a first tooth. The second protrusion of the first outer folding rocker arm is arranged in the gap between the transmission rod and the second sliding groove, and the inner arc surface of the first outer folding rocker arm is provided with a second tooth. The first tooth and the second tooth are engaged with each other.

8. The folding hinge structure according to claim 1, wherein, The first inner folding swing rod is provided with a slide groove, the first locking member is arranged in the slide groove and slides along the slide groove, and the sliding direction of the first locking member along the slide groove is parallel to the length direction of the main shaft; The first locking member comprises a locking portion, a first locking protrusion and a second locking protrusion, the first locking protrusion and the second locking protrusion are arranged at two ends of the locking portion and extend in opposite directions, and the end walls on both sides of the first receiving groove are also provided with corresponding locking holes; When the first locking member slides along the slide groove and causes the first locking protrusion to slide between the first inner folding swing rod and the first outer folding swing rod, the second virtual axis structure is locked, and the second locking protrusion abuts against the end wall of the first receiving groove; When the outer folding rocker arm assembly drives the inner folding rocker arm assembly to rotate relative to the main shaft and causes the second locking protrusion to slide into the locking hole, the first virtual axis structure is locked, and the first locking protrusion slides out from between the first inner folding rocker arm and the first outer folding rocker arm, the second virtual axis structure is unlocked, and the outer folding rocker arm assembly slides and rotates relative to the inner folding rocker arm assembly.

9. The folding hinge structure according to claim 1, wherein The folding hinge structure also includes a supporting component, which is connected to the middle frame component and the main shaft, so that when the middle frame component rotates, it rotates with the middle frame component and supports the flexible screen.

10. The folding hinge structure according to claim 9, wherein, The support assembly includes a first support member and a second support member, one end of the first support member is disposed on one side of the main shaft and can rotate relative to the main shaft, and one end of the first support member away from the main shaft is disposed in the first middle frame and can slide relative to the first middle frame; One end of the second support member is disposed on the other side of the main shaft and can rotate relative to the main shaft, and one end of the second support member away from the main shaft is disposed in the second middle frame and can slide relative to the second middle frame; The axis of rotation of the support assembly relative to the main shaft is parallel to the length direction of the main shaft, and the direction of relative sliding between the support assembly and the middle frame assembly is perpendicular to the length direction of the main shaft.

11. The folding hinge structure according to claim 10, wherein, The first supporting member comprises a first plate body, a second plate body, a first connecting plate and a second connecting plate, the first plate body and the second plate body are arranged along the length direction of the main shaft, one end of the first plate body is rotatably connected to the second plate body, the first connecting plate and the second connecting plate are arranged at the other ends of the first plate body and the second plate body which are opposite to each other, the first connecting plate is rotatably connected to the main shaft, and the second connecting plate is inserted in the first middle frame and can slide relative to the first middle frame; The structure of the second support member is the same as that of the first support member. The second support member is rotatably connected to the main shaft and slides relatively with the second middle frame.

12. The folding hinge structure according to claim 1, characterized in that The folding hinge structure also includes an appearance component, which is connected to the middle frame component and the main shaft, so as to rotate with the middle frame component when the middle frame component rotates, and achieve shielding of the folding hinge structure.

13. The folding hinge structure according to claim 12, wherein, The appearance component includes a first appearance component and a second appearance component, wherein the first appearance component is disposed on one side of the main shaft, one end of the first appearance component is fixedly disposed on the bottom of the main shaft, and the other end of the first appearance component is rotatably connected to the first middle frame, and the first middle frame can slide relative to the first appearance component along a length direction perpendicular to the main shaft; The second appearance member is arranged on the other side of the main shaft, one end of the second appearance member is fixedly arranged on the bottom of the main shaft, the other end of the second appearance member is rotatably connected to the second middle frame, and the second middle frame can slide relative to the second appearance member along the length direction perpendicular to the main shaft.

14. The folding hinge structure according to claim 13, wherein, The first appearance member includes a first plate and a second plate, one end of the first plate is disposed at the bottom of the main shaft, one end of the second plate is rotatably connected to an end of the first plate away from the main shaft, and is connected to the first middle frame, and can slide relative to the first middle frame; The structure of the second appearance member is the same as that of the first appearance member. One end of the second appearance member is disposed at the bottom of the main shaft, and the other end is connected to the second middle frame and slides relatively with the second middle frame.

15. A foldable terminal device, comprising a flexible screen, characterized in that, The folding terminal device further comprises a folding hinge structure as claimed in any one of claims 1 to 14; The flexible screen is connected to the first middle frame and the second middle frame, and covers the folding hinge structure.

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