Folding display terminal hinge structure and folding display terminal

Abstract

The utility model relates to the technical field of hinges, in particular to a folding display terminal hinge structure and a folding display terminal.The folding display terminal hinge structure comprises a track cover, the track cover comprises a first hinge part and a second hinge part, and the first hinge part and the second hinge part are arranged at intervals in the axis direction of the track cover; the first hinge part is provided with a first cambered surface, the second hinge part is provided with a second cambered surface, and the first cambered surface and the second cambered surface are located on the two sides of the track cover in the thickness direction respectively; one of the first cambered surface and the second cambered surface is an inner concave cambered surface, the other one is an outer convex cambered surface track rod, the track rod comprises a third hinge part and a fourth hinge part, a third cambered surface is arranged on the third hinge part, and the third cambered surface is in sliding fit with the first cambered surface; and a fourth cambered surface is arranged on the fourth hinge part and is in sliding fit with the second cambered surface. According to the hinge structure, the lap joint area of the track rod and the track cover in the rotating process can be better guaranteed, and therefore the hinge strength and the hinge stability of the hinge structure are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of hinges, and in particular to a hinge structure of a foldable display terminal and a foldable display terminal. Background Art

[0002] With the continuous development of display technology, foldable display terminals are gradually becoming a development trend of future mobile electronic products. When unfolded, foldable display terminals can obtain a larger display area and improve the viewing effect.

[0003] A foldable display terminal can obtain a smaller volume in a folded state. To further make it more compact and lightweight, the foldable display terminal is becoming thinner and thinner, which results in a smaller track diameter of the hinge, that is, the overlap between the track rod and the track cover in the folded state is getting smaller and smaller, which makes it very easy for the hinge to derail and be damaged. Utility Model Content

[0004] In order to solve the above technical problems or partially solve the above technical problems, the present application provides a foldable display terminal hinge structure and a foldable display terminal.

[0005] In a first aspect, the present application provides a hinge structure of a foldable display terminal, comprising a track cover, wherein the track cover comprises a first hinge portion and a second hinge portion, wherein the first hinge portion and the second hinge portion are arranged at intervals along an extension direction of the track cover and are arranged opposite to each other in a thickness direction of the track cover; a first arc surface is provided on the first hinge portion, and a second arc surface is provided on the second hinge portion, wherein the first arc surface and the second arc surface are respectively located on two sides of the thickness direction of the track cover; one of the first arc surface and the second arc surface is an inner concave arc surface, and the other is an outer convex arc surface;

[0006] A notch is formed on a side of the track cover facing away from the second curved surface and is connected to the second hinged portion;

[0007] The track rod comprises a third hinge part and a fourth hinge part, the third hinge part is provided with a third arc surface, and the third arc surface slides with the first arc surface; the fourth hinge part is provided with a fourth arc surface, and the fourth arc surface slides with the second arc surface, wherein when the contact area between the fourth hinge part and the second arc surface is the largest, the fourth hinge part is at least partially penetrated into the notch.

[0008] Optionally, the first hinged portion is a first arc-shaped groove, and the second hinged portion is a second arc-shaped groove;

[0009] The first arc surface is formed on the bottom surface of the first arc-shaped groove, and the second arc surface is formed on the bottom surface of the second arc-shaped groove;

[0010] The notch direction of the first arc-shaped groove and the notch direction of the second arc-shaped groove are arranged opposite to each other in the thickness direction of the track cover.

[0011] Optionally, the bottom portion of the first arc-shaped groove is recessed on the bottom surface of the first arc-shaped groove to form the first arc surface and the avoidance arc surface, and the first arc surface and the avoidance arc surface are sequentially arranged along the extension direction of the track cover.

[0012] Optionally, the first arc surface is located on a side of the avoidance arc surface away from the second hinged portion.

[0013] Optionally, a yield plane is provided on the second curved surface.

[0014] Optionally, there are two track bars, and the two track bars are respectively located on both sides of the track cover along the width direction.

[0015] Optionally, two second arc-shaped grooves opposite to each other in the width direction of the track cover are each provided with an opening at one end close to each other, and the two openings are spaced apart, and the two openings are connected to the notch.

[0016] Optionally, the track bar further comprises a main body, the fourth hinge portion is arranged on one side of the main body, and a fifth hinge portion slidably matched with the second arc surface is extended from an end surface of the fourth hinge portion away from the main body; the width of the fourth hinge portion is greater than the width of the fifth hinge portion, and an avoidance gap is formed between the fifth hinge portion and one side of the fourth hinge portion in the width direction;

[0017] The avoidance notch in one of the track rods is staggered with the fifth hinge portion in the other track rod.

[0018] Optionally, a dimension of the avoidance gap along the width direction of the fifth hinged portion is greater than or equal to the width of the fifth hinged portion.

[0019] In a second aspect, the present application further provides a foldable display terminal, comprising the above foldable display terminal hinge structure.

[0020] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0021] The present application provides a hinge structure for a folding display terminal, wherein the first arc surface and the third arc surface form a group of mating surfaces of the hinge structure during rotation, and the second arc surface and the third arc surface form another group of mating surfaces, and the two groups of mating surfaces are staggered with each other in the length direction of the axis of the track cover, and an increase in the mating area of ​​one group of mating surfaces will not lead to a decrease in the mating area of ​​the other group of mating surfaces. Therefore, even when facing a relatively thin folding display terminal, the two mating surfaces can increase the mating area independently without restriction. Compared with the traditional hinge structure, the hinge structure in the present application can better fully guarantee the overlap area of ​​the track rod and the track cover during rotation, thereby ensuring the hinge strength and hinge stability of the hinge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 This is a schematic diagram of the structure of the foldable display terminal hinge structure in a flattened state according to an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of the folding display terminal hinge structure according to an embodiment of the present application in a folded state;

[0026] Figure 3 This is an exploded view of the hinge structure of the foldable display terminal according to an embodiment of the present application;

[0027] Figure 4 This is an exploded view from another angle of the hinge structure of the foldable display terminal according to the embodiment of the present application;

[0028] Figure 5 A schematic diagram of a track bar structure in a hinge structure of a foldable display terminal according to an embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of a track cover structure in a hinge structure of a foldable display terminal according to an embodiment of the present application;

[0030] Figure 7 This is a schematic structural diagram of another angle of the track cover in the hinge structure of the foldable display terminal according to an embodiment of the present application;

[0031] Figure 8A top view of the hinge structure of the foldable display terminal according to an embodiment of the present application in a folded state;

[0032] Fig. 9 for Figure 8 Middle AA section cutaway view;

[0033] Fig.10 for Figure 8 Middle BB section cutaway view;

[0034] Fig.11 for Figure 1 A top view of

[0035] Fig.12 for Fig.11 Cross-sectional view of CC;

[0036] Fig.13 It is a side view of the track bar described in the embodiment of the present application.

[0037] in,

[0038] 1. Track cover; 10. First arc groove; 100. Avoidance arc surface; 101. First arc surface; 11. Second arc groove; 110. Second arc surface; 111. Yield plane; 12. Notch; 13. Opening; 2. Track rod; 20. Third hinge part; 200. Third arc surface; 21. Fourth hinge part; 210. Fourth arc surface; 22. Fifth hinge part; 23. Avoidance notch; 24. Main body; 25. Pin shaft hole. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] Reference Figures 1 to 4As shown, the present application provides a hinge structure of a folding display terminal, comprising a track cover 1 and a track bar 2, wherein the track cover 1 comprises a first hinge portion and a second hinge portion, wherein the first hinge portion and the second hinge portion are arranged at intervals along the extension direction of the track cover 1 and are arranged opposite to each other in the thickness direction of the track cover 1;

[0049] The track cover 1 is a plate-shaped structure as a whole, and mainly serves as a base part in the entire hinge structure, that is, the track rod 2 can rotate relative to the track cover 1 .

[0050] The first hinge part and the second hinge part are presented in the form of groove and cavity structures, and are mainly used for the hinged cooperation of the track rod 2. Exemplarily, the first hinge part and the second hinge part are arranged at intervals in the extension direction of the track cover 1, and the first hinge part and the second hinge part are respectively located on both sides of the thickness direction of the track cover 1.

[0051] The extending direction of the track cover 1 is the length direction of the straight line where the hinge center is located during the hinge matching process.

[0052] The first hinge part and the second hinge part are arranged at intervals in the length direction of the straight line where the hinge center is located, which can increase the stability of the track cover 1 and the track rod 2 during the hinge cooperation process.

[0053] The first hinge part and the second hinge part are respectively located on both sides of the track cover 1 in the thickness direction, and can limit the track bar 2 in the thickness direction of the track cover 1, so that the hinge process between the track cover 1 and the track bar 2 is more stable.

[0054] The first hinge portion is provided with a first curved surface 101, and the second hinge portion is provided with a second curved surface 110. The first curved surface 101 and the second curved surface 110 are respectively located on both sides of the track cover 1 in the thickness direction; one of the first curved surface 101 and the second curved surface 110 is an inner concave curved surface, and the other is an outer convex curved surface.

[0055] Specifically, the first curved surface 101 and the second curved surface 110 are used to directly cooperate with the track bar 2, and one of the first curved surface 101 and the second curved surface 110 is a concave curved surface, and the other is a convex curved surface to ensure that the track bar 2 and the track cover 1 can be hinged and rotated normally.

[0056] Exemplarily, the first arc surface 101 is a concave arc surface, and the second arc surface 110 is a convex arc surface.

[0057] A notch 12 is formed on the track cover 1 on one side facing away from the second curved surface 110 and is connected to the second hinged portion; the track rod 2 includes a third hinged portion 20 and a fourth hinged portion 21, the third hinged portion 20 is provided with a third curved surface 200, and the third curved surface 200 is slidably matched with the first curved surface 101; the fourth hinged portion 21 is provided with a fourth curved surface 210, and the fourth curved surface 210 is slidably matched with the second curved surface 110, wherein when the contact area between the fourth hinged portion 21 and the second curved surface 110 is the largest, the fourth hinged portion 21 is at least partially penetrated through the notch 12.

[0058] Specifically, a third hinge part 20 and a fourth hinge part 21 are provided on the track rod 2. The third arc surface 200 provided on the third hinge part 20 slides with the first arc surface 101 in the first hinge part. The fourth arc surface 210 provided on the fourth hinge part 21 slides with the second arc surface 110 in the second hinge part. Correspondingly, the third arc surface 200 is a convex arc surface, and the fourth arc surface 210 is a concave arc surface.

[0059] Reference Figures 6 to 10 As shown, a notch 12 is provided on the track cover 1, and the notch 12 is formed on the side where the first hinge portion is located and is interconnected with the second hinge portion. During the sliding of the fourth hinge portion 21 relative to the second hinge portion, when the contact area between the fourth arc surface 210 and the second arc surface 110 is the largest, the end of the fourth hinge portion 21 is inserted into the notch 12 to prevent the track cover 1 from interfering with the fourth hinge portion 21.

[0060] The present application provides a hinge structure for a folding display terminal, wherein the first curved surface 101 and the third curved surface 200 form a group of mating surfaces of the hinge structure during rotation, and the second curved surface 110 and the third curved surface 200 form another group of mating surfaces, and the two groups of mating surfaces are staggered with each other in the length direction of the axis of the track cover 1, and an increase in the mating area of ​​one group of mating surfaces will not lead to a decrease in the mating area of ​​the other group of mating surfaces. Therefore, even when facing a relatively thin folding display terminal, the two mating surfaces can increase the mating area independently without restriction. Compared with the traditional hinge structure, the hinge structure in the present application can better fully guarantee the overlap area of ​​the track bar 2 and the track cover 1 during rotation, thereby ensuring the hinge strength and hinge stability of the hinge structure.

[0061] In some further embodiments, the first hinged portion is a first arcuate groove 10, and the second hinged portion is a second arcuate groove 11; the first arc surface 101 is formed on the bottom surface of the first arcuate groove 10, and the second arc surface 110 is formed on the bottom surface of the second arcuate groove 11; the slot direction of the first arcuate groove 10 and the slot direction of the second arcuate groove 11 are arranged opposite to each other in the thickness direction of the track cover 1.

[0062] Exemplarily, the first hinged portion is a first arcuate groove 10, and the first arc surface 101 is formed on the bottom surface of the first arcuate groove 10; the second hinged portion is a second arcuate groove 11, and the second arc surface 110 is formed on the bottom surface of the second arcuate groove 11; the notch of the first arcuate groove 10 is arranged opposite to the notch of the second arcuate groove 11.

[0063] Reference Figure 6 As shown, in some further embodiments, the bottom portion of the first arc-shaped groove 10 is recessed on the bottom surface of the first arc-shaped groove 10 to form a first arc surface 101 and an avoidance arc surface 100, and the first arc surface 101 and the avoidance arc surface 100 are arranged in sequence along the extension direction of the track cover 1.

[0064] During the cooperation between the track cover 1 and the track rod 2, the first arc surface 101 in the first hinge part and the third arc surface 200 in the third hinge part 20 are in direct contact and sliding cooperation. In order to reduce the friction between the two and not affect the hinge angle of the track rod 2 relative to the track cover 1, the bottom part of the first arc groove 10 is recessed, wherein the recessed part forms an avoidance arc surface 100. When the third hinge part 20 and the first arc groove 10 actually cooperate with each other, only part of the third arc surface 200 is in contact with the first arc surface 101 of the first arc groove 10, and a gap is formed between the remaining part of the third arc surface 200 and the avoidance arc surface 100, thereby reducing the friction between the track rod 2 and the track cover 1 during the cooperation process and making the cooperation between the two smoother.

[0065] It should be noted that both the first arc surface 101 and the avoidance arc surface 100 have complete arc surfaces, that is, the boundary between the recessed part and the non-recessed part of the first arc groove 10 is along the arc surface extension direction of the bottom of the first arc groove 10 .

[0066] In some further embodiments, the first curved surface 101 is located on a side of the avoidance curved surface 100 away from the second hinge portion.

[0067] The first hinge part and the second hinge part are arranged at intervals, and the first arc surface 101 is located on the side of the avoidance arc surface 100 away from the second hinge part, so that the first arc surface 101 is arranged away from the second arc surface 110, that is, the greater the distance between the hinge positions of the track bar 2 and the track cover 1, the more stable the cooperation between the track bar 2 and the track cover 1. In some other embodiments, the number of first hinge parts is two, the number of second hinge parts is one, and the two first hinge parts are respectively located on both sides of the second hinge part. Therefore, when the two first arc surfaces 101 are respectively located on the side of the two avoidance arc surfaces 100 away from the second hinge part, the distance between the two first arc surfaces 101 will also be the largest, so as to improve the connection stability and cooperation stability between the track bar 2 and the track cover 1.

[0068] Reference Figure 7As shown, in some further embodiments, a clearance plane 111 is provided on the second curved surface 110 .

[0069] Specifically, refer to Figure 3 The fourth hinge part 21 is an arc-shaped plate structure, and the concave arc surface on one side thereof is the fourth arc surface 210. In the process of cooperating with the second hinge part, the fourth arc surface 210 and the second arc surface 110 contact and slide with each other. In order to reduce the friction between the two, a yield plane 111 is set in the middle section of the second arc surface 110. In the actual rotation process, a gap is formed between the yield plane 111 and the fourth arc surface 210. Therefore, there is always a part on the fourth arc surface 210 that does not contact the yield plane 111, thereby reducing the friction during the cooperation between the second hinge part and the fourth hinge part 21.

[0070] In addition, if Figure 7 As shown, the yield plane 111 is specifically arranged on the side of the second curved surface 110 facing the track cover 1 and away from the first arc groove 10, so that the yield plane 111 of the plane divides the second curved surface 110 into two small curved surfaces on both sides of the yield plane 111, so that when the contact area between the fourth curved surface 210 and the second curved surface 110 is the largest, the fourth curved surface 210 is respectively in contact with the small curved surfaces on the left and right sides of the yield plane 111, and as the track rod 2 rotates relative to the track cover 1, the contact area between the fourth curved surface 210 and the second curved surface 110 gradually decreases, until the contact area between the fourth curved surface 210 and the second curved surface 110 is the smallest, the fourth curved surface 210 and a small curved surface adjacent to the yield plane 111 and away from the track cover 1 still have an overlapping area, so as to ensure that no matter how much the fourth hinge 21 rotates relative to the second hinge, a partial area of ​​the second curved surface 110 can always be in contact with the fourth curved surface 210, so as to ensure the connection stability between the second hinge and the fourth hinge 21.

[0071] In some further embodiments, the number of the track bars 2 is two, and the two track bars 2 are respectively located on two sides of the track cover 1 along the width direction.

[0072] Specifically, there are two track rods 2, which are respectively located on both sides of the track cover 1. In actual situations, two first hinge parts and one second hinge part are provided on one side along the width direction of the track cover 1, and two first hinge parts and one second hinge part are also provided on the other side along the width direction of the track cover 1, and the two groups are symmetrical to each other.

[0073] In some further embodiments, two second arc-shaped grooves 11 opposite to each other along the width direction of the track cover 1 are each provided with an opening 13 at one end close to each other, and the two openings 13 are spaced apart, and the two openings 13 are connected to the notch 12 .

[0074] The two second arc grooves 11 located on both sides of the track cover 1 are arranged opposite to each other, and the ends close to each other form an opening 13 that is interconnected with the notch 12. When the fourth hinged portion 21 is hingedly matched in the second arc groove 11, part of the fourth hinged portion 21 will penetrate into the notch 12 through the opening 13. Under the action of the opening 13 and the notch 12, it can be ensured that when the thickness of the track cover 1 is smaller, the opening and closing angle of the track rod 2 relative to the track cover 1 is larger.

[0075] Reference Figure 5 As shown, in some further embodiments, the track bar 2 further comprises a main body 24, the fourth hinge portion 21 is arranged on one side of the main body 24, and a fifth hinge portion 22 slidably matched with the second arc surface 110 is extended from an end surface of the fourth hinge portion 21 away from the main body 24; the width of the fourth hinge portion 21 is greater than the width of the fifth hinge portion 22, and an avoidance gap 23 is formed between the fifth hinge portion 22 and one side of the fourth hinge portion 21 in the width direction;

[0076] The avoidance notch 23 in one track rod 2 is arranged staggered with the fifth hinge portion 22 in the other track rod 2 .

[0077] The opening and closing angles of the two track bars 2 relative to the track cover 1 are the same. In order to avoid the interference of the two fourth hinged parts 21 at the notch 12 and affect the opening and closing angles of the two track bars 2, a fifth hinged part 22 is provided on the opposite end of the two fourth hinged parts 21, wherein the width of the fourth hinged part 21 is greater than the width of the fifth hinged part 22. Since the fifth hinged part 22 is formed by extending from the end of the fourth hinged part 21, and the width of the fifth hinged part 22 is less than the width of the fourth hinged part 21, the part of the fourth hinged part 21 where the fifth hinged part 22 is not provided forms a notch under the enclosure of the end face side of the fifth hinged part 22 and the fourth hinged part 21, that is, a avoidance notch 23 is formed to make way for the fifth hinged part 22 in the opposite track bar 2.

[0078] In actual situations, the fifth hinged portions 22 in the two track rods 2 are staggered, that is, when the two fifth hinged portions 22 cooperate with each other, the avoidance notch 23 of one track rod 2 is used to make way for the fifth hinged portion 22 in the other track rod 2, and the avoidance notch 23 in the other track rod 2 is used to make way for the avoidance notch 23 in one track rod 2. The setting of the fifth hinged portion 22 can not only ensure the cooperation stability of the fourth hinged portion 21 and the fifth hinged portion 22, but also ensure the opening and closing angle of the track rod 2 relative to the track cover 1.

[0079] In some other embodiments, a pin hole 25 is provided on the side of the main body 24 facing away from the fourth hinged portion 21 for use with a track pin to connect to the middle frame fixing member.

[0080] In some further embodiments, a dimension of the avoidance notch 23 along the width direction of the fifth hinged portion 22 is greater than or equal to the width of the fifth hinged portion 22 .

[0081] Since the avoidance notch 23 needs to give way to the fifth hinge 22, the dimension of the avoidance notch 23 along the width direction of the fifth hinge 22 is greater than or equal to the width of the fifth hinge 22, so as to accommodate the fifth hinge 22. Preferably, the dimension of the avoidance notch 23 along the width direction of the fifth hinge 22 is equal to the width of the fifth hinge 22.

[0082] In some further embodiments, Fig. 9 and Fig.10 As shown, Fig. 9 and Fig.10 The state shown is a state where the two track rods 2 are folded at the maximum angle, that is, the distance between the two track rods 2 and one end of the track cover 1 is the shortest. At this time, the overlapping area between the third arc surface 200 and the first arc surface 101 is the smallest, and the corresponding overlapping area between the fourth arc surface 210 and the second arc surface 110 is also the smallest. At the same time, the overlapping between the third arc surface 200 and the first arc surface 101 can block the third arc surface 200 from moving away from the rotation axis, and the overlapping between the fourth arc surface 210 and the second arc surface 110 can block the fourth arc surface 210 from moving toward the rotation axis, so that the third arc surface 200 and the fourth arc surface 210 can be fixed, allowing the third arc surface 200 and the fourth arc surface 210 to rotate while preventing the third arc surface 200 and the fourth arc surface 210 from moving toward or away from the rotation axis.

[0083] In some further embodiments, Fig.11 and Fig.12 As shown, Fig.11 and Fig.12 The state shown is a state where the two track bars 2 are laid flat at the maximum angle, that is, the distance between the two track bars 2 and one end of the track cover 1 is the farthest. At this time, the overlap area between the third arc surface 200 and the first arc surface 101 is the largest, and the overlap area between the corresponding fourth arc surface 210 and the second arc surface 110 is also the largest. Moreover, the avoidance notch 23 provided on any track bar 2 is respectively arranged opposite to the fifth hinge portion 22 provided on the other track bar 2, so that in the state shown in FIG. Fig.11 and Fig.12 The two fifth hinges 22 of the two track bars 2 in the shown state will not interfere with each other. Meanwhile, when the two track bars 2 are laid flat at the maximum angle, at least each fifth hinge 22 partially passes through the notch 12 .

[0084] In some further embodiments, Fig.13As shown, a gap is provided between the third hinge part 20 and the fourth hinge part 21 so that when the diameter of the third hinge part 20 becomes larger, the third hinge part 20 will not interfere with the fourth hinge part 21. The stability of the connection between the track rod 2 and the track cover 1 can be improved by increasing the contact area of ​​the third hinge part 20 alone.

[0085] In a second aspect, the present application further provides a foldable display terminal, comprising the above-mentioned foldable display terminal hinge structure.

[0086] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A hinge structure for a foldable display terminal, characterized in that: include: A track cover, the track cover comprising a first hinge portion and a second hinge portion, the first hinge portion and the second hinge portion are arranged at intervals along the extension direction of the track cover and are arranged opposite to each other in the thickness direction of the track cover; the first hinge portion is provided with a first arc surface, the second hinge portion is provided with a second arc surface, the first arc surface and the second arc surface are respectively located on both sides of the thickness direction of the track cover; one of the first arc surface and the second arc surface is an inner concave arc surface, and the other is an outer convex arc surface; A notch is formed on a side of the track cover facing away from the second curved surface and is connected to the second hinged portion; The track rod comprises a third hinge part and a fourth hinge part, the third hinge part is provided with a third arc surface, and the third arc surface slides with the first arc surface; the fourth hinge part is provided with a fourth arc surface, and the fourth arc surface slides with the second arc surface, wherein when the contact area between the fourth hinge part and the second arc surface is the largest, the fourth hinge part is at least partially penetrated into the notch.

2. The hinge structure of the foldable display terminal according to claim 1, characterized in that: The first hinged portion is a first arc-shaped groove, and the second hinged portion is a second arc-shaped groove; The first arc surface is formed on the bottom surface of the first arc-shaped groove, and the second arc surface is formed on the bottom surface of the second arc-shaped groove; The notch direction of the first arc-shaped groove and the notch direction of the second arc-shaped groove are arranged opposite to each other in the thickness direction of the track cover.

3. The hinge structure of the foldable display terminal according to claim 2, characterized in that: The groove bottom portion of the first arc groove is recessed on the groove bottom surface of the first arc groove to form the first arc surface and the avoidance arc surface, and the first arc surface and the avoidance arc surface are sequentially arranged along the extension direction of the track cover.

4. The hinge structure of the foldable display terminal according to claim 3, characterized in that: The first arc surface is located on a side of the avoidance arc surface away from the second hinged portion.

5. The hinge structure of the foldable display terminal according to claim 2, characterized in that: The second arc surface is provided with a yield plane.

6. The hinge structure of the foldable display terminal according to claim 2, characterized in that: The number of the track bars is two, and the two track bars are respectively located on two sides of the track cover along the width direction.

7. The hinge structure of the foldable display terminal according to claim 6, characterized in that: Two second arc-shaped grooves that are opposite to each other along the width direction of the track cover are each provided with an opening at one end close to each other, and the two openings are spaced apart from each other, and the two openings are communicated with the notch.

8. The hinge structure of the foldable display terminal according to claim 7, characterized in that: The track bar further comprises a main body, the fourth hinge portion is arranged on one side of the main body, and a fifth hinge portion slidably matched with the second arc surface is extended from an end surface of the fourth hinge portion away from the main body; the width of the fourth hinge portion is greater than the width of the fifth hinge portion, and an avoidance gap is formed between the fifth hinge portion and one side of the fourth hinge portion in the width direction; The avoidance notch in one of the track rods is staggered with the fifth hinge portion in the other track rod.

9. The hinge structure of the foldable display terminal according to claim 8, characterized in that: A dimension of the avoidance notch along a width direction of the fifth hinged portion is greater than or equal to a width of the fifth hinged portion.

10. A foldable display terminal, characterized in that: The invention comprises the hinge structure of the folding display terminal as claimed in any one of claims 1 to 9.

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