Horizontal nest type fold-free folding screen hinge

Abstract

A horizontal nest type fold-free folding screen hinge is composed of a supporting body 1 and components matched with the supporting body 1. The support body 1 is long-strip-shaped, and the periphery of an upper opening of the support body 1 is straight. The two transverse sides of the U-shaped groove 2 extend outwards along with the left unfolding wing rotating shaft 4 and the right unfolding wing rotating shaft 6 to form a left unfolding wing 3 and a right unfolding wing 5, and the left unfolding wing 3 and the right unfolding wing 5 are fixed to a left unfolding wing fixing base plate 7 and a right unfolding wing fixing base plate 9. The interior of the U-shaped groove 2 is in a half-arc shape, and the half-arc shape is a screen containing space where the OLED flexible liquid crystal display 11 enters in the inwards-bent state. The stress of the OLED flexible liquid crystal display 11 is fully stored when the inner bending arc R is horizontally placed in the U-shaped groove 2, and the stress is also completely released when the OLED flexible liquid crystal display 11 goes out of the U-shaped groove 2, so that the OLED flexible liquid crystal display 11 cannot be folded and damaged. According to the utility model, the capacitive screen is internally horizontal, has an elastic structure, can freely store and release stress, and has the characteristics of flexible torsion, traceless folding, pressure-controlled hovering function, light weight, low cost, long service life, good damping hand feeling, impact resistance, water resistance and dust resistance.

Description

Technical Field

[0001] The nested crease-free folding screen hinge relates to the field of electronic display devices. Background Art

[0002] The hinges of existing electronic folding display devices are all hard-top hard metal hinge structures, which have precise manufacturing processes, complex transmission mechanisms, many parts, high costs, heavy weights, and thick thicknesses; the hinges are exposed, not waterproof and prone to dust ingress; creases and wrinkles are inevitably generated at the folding place, and the service life is not long; their fragility to drops easily damages the hinge components, resulting in fractures and liquid leakage at the screen folding place, leading to scrapping; the maintenance cost is extremely high.

[0003] Object of the Invention

[0004] The object of the present utility model is to design a nested placenta structure, in which the internal stress is released freely when the screen is bent, no creases are generated, and it is thin, light, low-cost, drop-resistant, easy to maintain, and waterproof and dustproof for the hinge of the folding screen. Summary of the Invention

[0005] The utility model is composed of a support body 1 and components cooperating therewith. The support body 1 is made of metal or high-strength rigid synthetic plastic, and has the characteristics of being rigid, thin, and light in weight. The main body of the support body 1 is made in the shape of a semi-circular arc R "U" - shaped groove 2 with an upper opening and both ends blocked, which is long and strip-shaped. The periphery of the opening thereon is straight and at the same horizontal plane. Two wingspans are extended outward from the transverse sides of the "U" - shaped groove 2. One side is the left wing 3. A left wing rotating shaft 4 connected to the left wing 3 is made on the left side of the "U" - shaped groove 2, so that the left wing 3 can make fan - shaped activities at various angles around the axis of the left wing rotating shaft 4. One side is the right wing 5. A right wing rotating shaft 6 connected to the right wing 5 is made on the right side of the "U" - shaped groove 2, so that the right wing 5 can make fan - shaped activities at various angles around the axis of the right wing rotating shaft 6. The left wing 3 and the right wing 5 are opposite to each other with a certain distance in between, and the widths of their outward extensions are approximately the same. The left wing 3 can move from the horizontal 0 degrees to the vertical 90 degrees, either standing up towards the opening of the "U" - shaped groove 2 or in a horizontal line state; the right wing 5 can move from the vertical 90 degrees to the horizontal 0 degrees, either standing up towards the opening of the "U" - shaped groove 2 or in a horizontal line state. The left wing 3 and the right wing 5 can simultaneously move vertically in parallel above the "U" - shaped groove 2 under the externally applied force transmitted, and the two wings can reach a state perpendicular and parallel to the plane of the "U" - shaped groove 2. The left wing 3 and the right wing 5 can also simultaneously move outward in a plane towards the opening of the "U" - shaped groove 2 under the externally applied force transmitted, reaching a state where the two wings are in a horizontal straight line. The left wing 3 is fixed to the edge of the left wing fixed substrate 7 in the half - body of the display device through a plurality of left wing fixing holes 8; the longitudinal length of the right wing 5 is equivalent to the width of the right wing fixed substrate 9. The left wing fixed substrate 7 and the right wing fixed substrate 9 are opposite to each other and are butt - joint fixed with the left wing 3 and the right wing 5; thus, the basic support structure of its hinge is formed. The inside of the "U" - shaped groove 2 is semi - circular arc - shaped, and therein is the "screen - containing space" where the OLED flexible liquid crystal display screen 11 enters in a water - droplet shape when in the inner - folding and bending state. Since the bending arc R of the OLED flexible liquid crystal display screen 11 lies in the "U" - shaped groove 2 during inner - folding without being stressed and squeezed due to the "hard - top of the metal hinge", the bending stress of the inner - folding arc R of the OLED flexible liquid crystal display screen 11 is fully accommodated, and when it comes out, the stress is completely released and restored to a flat state. A bottom groove 12 with a width of about two millimeters is opened at the longitudinal bottom of the "U" - shaped groove 2, and the bottom groove 12 leads to the outside. On both sides from the half - waist of the outer arc of the "U" - shaped groove (2) to the bottom groove 12, a number of left semi - circular teeth 13 and right semi - circular teeth 14 of the same length as the longitudinal direction of the "U" - shaped groove 2 are evenly made at equal distances. Inside the lower parts of the left wing housing 15 and the right wing housing 16 of the display device connected and fixed to the left wing 3, the right wing 5, the left wing fixed substrate 7, and the right wing fixed substrate 9, a number of arc - shaped left wing housing grooves 17 and right wing housing grooves 18 are made respectively.The left wing shell groove 17 and the right wing shell groove 18 are concave and convex opposite to the left semicircular teeth 13 and the right semicircular teeth 14, and the lengths are equivalent. When the left wing shell 15 and the right wing shell 16 are in the same or close to the horizontal line state of 180 degrees, their tails are butted against each other. At the same time, the left wing shell groove 17 and the right wing shell groove 18 are respectively matched with the corresponding left semicircular teeth 13 and the right semicircular teeth 14, and friction is generated. This friction is the basic condition for multi-angle hovering. At the ends of the left wing shell 15 and the right wing shell 16, that is, the outer edges of the left wing shell groove 17 and the right wing shell groove 18, a left arc-shaped barb 19 and a right arc-shaped barb 20 are respectively made. When the outer shell 15 at the left wing and the outer shell 16 at the right wing are at the same or close to the horizontal line state of 180 degrees, when their tails are butted against each other, they also fall into and get stuck in the bottom groove 12 at the bottom of the "U"-shaped groove 2, and push up. A covering fetal membrane 21 is made to cover the top of the "U"-shaped groove 2. The width of the covering fetal membrane 21 is just the same as that of the OLED flexible liquid crystal display screen 11, and both can lie inside the "U"-shaped groove 2. The covering fetal membrane 21 surrounds the outside of the left wing 3 and the right wing 5 through the plane of the "U"-shaped groove 2, and is sandwiched between the left wing 3 and the right wing 5 and the left wing fixed substrate 7 and the right wing fixed substrate 9, and is fixed together through a number of left wing fixed holes 8 and a number of right wing fixed holes 10. A liquid filling capsule 22 is made that is equivalent to the size of the bottom half of the space inside the "U"-shaped groove 2. When the bend R of the OLED flexible liquid crystal display screen 11 enters the "U"-shaped groove 2, the liquid filling capsule 22 is at the bottom and is only lightly resisted; when the bend R of the OLED flexible liquid crystal display screen 11 disappears and becomes flat, the liquid filling capsule 22 is in a semi-filled and relaxed state; and when the outer shell 15 at the left wing and the outer shell 16 at the right wing are subjected to force at the same time, and their respective tails, namely the left arc-shaped barb 19 and the right arc-shaped barb 20, fall into and get stuck in the bottom groove 12 at the bottom of the "U"-shaped groove 2, the liquid filling capsule 22 is squeezed by the inserted foreign matter and is filled or tends to be filled in the "U"-shaped groove 2. The saturated state supports the OLED flexible liquid crystal display screen 11 to be lifted up at the folded part to maintain its flatness. At the upper part of both sides of the "U"-shaped groove 2, near the left wing 3 and the right wing 5, there are a number of left wing exhaust holes 23 and right wing exhaust holes 24 with small apertures arranged in a row, so that the blocking gas in the "U"-shaped groove 2 can be discharged. A pressure sensor or touch sensor 25 for turning on or off the screen, human body sensing or approaching can be placed inside the "U"-shaped groove 2, but it is not limited to being placed. The wiring 26 of its power circuit can pass through the left wing exhaust hole 23 and the right wing exhaust hole 24 close to it to reach the main board circuit.

[0006] The utility model has a lying and elastic structure within the screen-containing space, freely storing and releasing stress, and has the characteristics of orderly torsion, no folding marks, light weight, low cost, long service life, good damping feel, resistance to dropping, impact, water, and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a front cross-sectional view of the utility model.

[0008] Figure 2 It is a plan top view of the support body and the liquid-filled capsule.

[0009] Figure 3 It is a front view of the support body and the liquid-filled capsule.

[0010] Figure 4 It is a schematic diagram of the closed state of the utility model.

[0011] Figure 5 It is a schematic diagram of the semi-open and hovering state of the utility model.

[0012] Figure 6 It is a schematic diagram of the fully open state of the utility model.

[0013] Figure 7 It is a three-dimensional cross-sectional view of the support body and a diagram showing the positions of the fixing holes, pressure sensors, and exhaust holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Embodiment: This embodiment consists of a support body 1 and components cooperating therewith. The support body 1 is made of metal or high-strength rigid synthetic plastic and has the characteristics of being rigid, ultra-thin, and lightweight. The main body of the support body 1 is made in the shape of a semi-circular R "U" - shaped groove 2 with an upper opening and both ends blocked. It is long and strip-shaped, and the periphery of its opening is straight and at the same horizontal plane. Two wingspans extend outward from the two transverse sides of the "U" - shaped groove 2. One side is the left - extending wing 3, and a left - extending wing rotating shaft 4 linked to the left - extending wing 3 is made on the left side of the "U" - shaped groove 2, enabling the left - extending wing 3 to make fan - shaped activities at various angles around the axis of the left - extending wing rotating shaft 4. The other side is the right - extending wing 5, and a right - extending wing rotating shaft 6 linked to the right - extending wing 5 is made on the right side of the "U" - shaped groove 2, enabling the right - extending wing 5 to make fan - shaped activities at various angles around the axis of the right - extending wing rotating shaft 6. The left - extending wing 3 and the right - extending wing 5, which are opposite to each other with a certain distance in between, have approximately the same width when they extend outward. The left - extending wing 3 can move from the horizontal 0 degrees to the vertical 90 degrees, either standing up towards the opening of the "U" - shaped groove 2 or in a horizontal line state; the right - extending wing 5 can move from the vertical 90 degrees to the horizontal 0 degrees, either standing up towards the opening of the "U" - shaped groove 2 or in a horizontal line state. The left - extending wing 3 and the right - extending wing 5 can simultaneously move vertically and parallel above the "U" - shaped groove 2 under the action of an externally applied force transmitted, and the two wings can reach a state perpendicular and parallel to the plane of the "U" - shaped groove 2. The left - extending wing 3 and the right - extending wing 5 can also simultaneously move outward in a plane towards the opening of the "U" - shaped groove 2 under the action of an externally applied force transmitted, reaching a state where the two wings form a horizontal straight line.

[0015] The left - extending wing 3 is fixed to the edge of the left - extending wing fixed substrate 7 in the half - body of the display device through a number of left - extending wing fixing holes 8. The longitudinal length of the left - extending wing 3 is equivalent to the width of the left - extending wing fixed substrate 7. The right - extending wing 5 is fixed to the edge of the right - extending wing fixed substrate 9 in the other half - body of the display device through a number of right - extending wing fixing holes 10. The longitudinal length of the right - extending wing 5 is equivalent to the width of the right - extending wing fixed substrate 9. The left - extending wing fixed substrate 7 and the right - extending wing fixed substrate 9 are opposite to each other and are butt - joint fixed with the left - extending wing 3 and the right - extending wing 5; thus, the "U" - shaped groove 2 forms the basic support structure of its hinge through the hinge connection of the left - extending wing 3 and the right - extending wing 5 with the left - extending wing fixed substrate 7 and the right - extending wing fixed substrate 9, which are opposite to each other in the two half - bodies of the display device.

[0016] The inside of the "U" - shaped groove 2 is semi - circular, and therein is the "screen - containing space" where the OLED flexible liquid crystal display screen 11 enters in a water - droplet shape when in the inner - folded and bent state. The space inside the "U" - shaped groove 2 is similar in size and depth to the inner - bent arc R of the OLED flexible liquid crystal display screen 11 entering therein, measured in millimeters, but they are not equal, and the depth cannot fully fill it, and there is still quite a lot of empty space left in the "U" - shaped groove 2. The width of the OLED flexible liquid crystal display screen 11 is exactly equivalent to the inner - wall width of the "U" - shaped groove 2, and it fits closely with it in the "U" - shaped groove 2 and can enter and exit smoothly.

[0017] A bottom groove 12 with a width of about two millimeters is opened at the longitudinal bottom of the "U" - shaped groove 2. The bottom groove 12 leads to the outside, and the length of the bottom groove 12 is shorter than the length of the "U" - shaped groove 2.

[0018] On both sides from the mid - waist of the outer arc of the "U" - shaped groove (2) to the bottom groove 12, a number of left semi - circular teeth 13 and right semi - circular teeth 14 that are longitudinally equal in length to the "U" - shaped groove 2 are evenly made at equal intervals. The size of the radius R of the left semi - circular teeth 13 and right semi - circular teeth 14 is in millimeters.

[0019] Inside the lower part of the left - wing housing 15 and the right - wing housing 16 of the display device that are fixedly connected to the left wing 3, the right wing 5, the left - wing fixed substrate 7, and the right - wing fixed substrate 9, a number of arc - shaped left - wing housing grooves 17 and right - wing housing grooves 18 are made respectively. The left - wing housing grooves 17 and the right - wing housing grooves 18 are concave - convex opposite and equal in length to the left semi - circular teeth 13 and the right semi - circular teeth 14. When the left - wing housing 15 and the right - wing housing 16 are in the same or close to the 180 - degree horizontal line state, their tails are butted against each other, and their respective halves complement each other. At the same time, the left - wing housing grooves 17 and the right - wing housing grooves 18 respectively coincide with the corresponding left semi - circular teeth 13 and right semi - circular teeth 14 and generate frictional force. The magnitude of this frictional force depends on the degree of closeness of the fit between the left - wing housing grooves 17 and the right - wing housing grooves 18 and the left semi - circular teeth 13 and the right semi - circular teeth 14, as well as the thickness of the materials of the left - wing housing grooves 17 and the right - wing housing grooves 18 themselves and the magnitude of the elastic tension, limited to having damped frictional sliding; this can be the basic condition for the left - wing housing 15 and the right - wing housing 16 driven to hover at multiple angles.

[0020] At the ends of the left - wing housing 15 and the right - wing housing 16, that is, outside the left - wing housing grooves 17 and the right - wing housing grooves 18, a left arc - shaped barb 19 and a right arc - shaped barb 20 are made respectively. The hook lengths of the left arc - shaped barb 19 and the right arc - shaped barb 20 are in millimeters. When the left - wing housing 15 and the right - wing housing 16 are in the same or close to the 180 - degree horizontal line state and their tails are butted against each other, the first parts to come into contact are the two sides of the left arc - shaped barb 19 and the right arc - shaped barb 20; and at this time, the left arc - shaped barb 19 and the right arc - shaped barb 20 just fall into and are stuck in the bottom groove 12 at the bottom of the "U" - shaped groove 2 and jack up.

[0021] There is a covering membrane 21 which covers the top of the "U"-shaped groove 2. The width of the covering membrane 21 is equivalent to that of the "U"-shaped groove 2 and exactly the same as the width of the OLED flexible liquid crystal display screen 11, and all can be recessed into the "U"-shaped groove 2. The covering membrane 2 is closely attached to the bending R of the OLED flexible liquid crystal display screen 11. First of all, it is pushed into the groove by the bending R of the OLED flexible liquid crystal display screen 11. The covering membrane 21 is made of rubber material, with a relatively thin thickness, good elasticity and flexibility, and its rubber hardness is less than 20 degrees under the test of a Shore hardness tester. The covering membrane 20 surrounds the outsides of the left wing 3 and the right wing 5 through the plane of the "U"-shaped groove 2 and is clamped inside between the left wing 3 and the right wing 5 and the left wing fixed substrate 7 and the right wing fixed substrate 9, and is fixed together through a plurality of left wing fixing holes 8 and a plurality of right wing fixing holes 10.

[0022] The covering membrane 21 is tightened and loosened according to the activity change of the arc tension of the left wing 3 and the right wing 5: when the bending R of the OLED flexible liquid crystal display screen 11 enters the "U"-shaped groove 2, the covering membrane 21 is relatively loose, and the OLED flexible liquid crystal display screen 11 gently presses against the covering membrane 21 into the groove; when the bending R of the OLED flexible liquid crystal display screen 11 slides out of the "U"-shaped groove 2, the covering membrane 21 is relatively straightened and tightened, and the elastic force increases, which also has a role of outwardly supporting the OLED flexible liquid crystal display screen 11.

[0023] There is a liquid-filled air bladder 22 which is equivalent in size to the lower half space inside the "U"-shaped groove 2. The liquid-filled air bladder 22 is made by wrapping and inflating with a composite thermoplastic rubber material with good fluidity, good resilience, anti-slip and wear resistance. It is required that the airtightness of the wrapping rubber material is extremely good to prevent air leakage after long-term use, and its rubber hardness is below 10 degrees under the test of a Shore hardness tester.

[0024] When the bending R of the OLED flexible liquid crystal display screen 11 enters the "U"-shaped groove 2, the liquid-filled air bladder 22 is at the bottom and is only gently touched; when the bending R of the OLED flexible liquid crystal display screen 11 disappears and becomes flat, the liquid-filled air bladder 22 is in a semi-filled and relaxed state; when the outer shells 15 at the left wing and the outer shells 16 at the right wing are simultaneously stressed, and their respective tails, namely the left arc-shaped barbs 19 and the right arc-shaped barbs 20, fall into and are stuck in the bottom groove 12 at the bottom of the "U"-shaped groove 2, the liquid-filled air bladder 22 is squeezed by foreign objects inserted from the outside, and the "U"-shaped groove 2 is filled with the liquid-filled air bladder 22 therein, or tends to be in a saturated state of being filled, which is to support the OLED flexible liquid crystal display screen 11 to be lifted at the folding part, so as not to affect its flatness due to touch collapse and deformation.

[0025] At the upper parts on both sides of the "U"-shaped groove 2, near the left wing 3 and the right wing 5, several left wing exhaust holes 23 and right wing exhaust holes 24 with small apertures are arranged in a row. Since the inside of the "U"-shaped groove 2 is in a relatively closed state, air resistance phenomenon will inevitably occur due to pressure difference during movement. The left wing exhaust holes 23 and the right wing exhaust holes 24 can discharge the blocked gas in the "U"-shaped groove 2, making it twist smoothly, and at the same time, the damping effect of the rubber material can also be reflected.

[0026] In the "U"-shaped groove 2, a pressure sensor or a touch sensor 25 for turning on or off the screen, human body sensing or proximity can be installed, but not limited to this. The wiring 26 of its power supply circuit can pass through the nearby left wing exhaust holes 23 and right wing exhaust holes 24 and reach the main board circuit.

Claims

1. A nest-type folding screen hinge without creases, comprising a supporting body (1) and parts cooperating therewith, characterized in that: The support body (1) is made of metal or high-strength hard synthetic plastic, and has the characteristics of being tough, ultra-thin and light. The main body of the support body (1) is formed into a semi-circular R-shaped "U"-shaped groove (2) with two ends of the upper opening blocked, and the shape is long and the opening on it is flat and located in the same horizontal plane. The two lateral sides of the "U"-shaped groove (2) extend outward to form two wing spans, one side is a left wing (3), and a left wing shaft (4) connected to the left wing (3) is formed on the left side of the "U"-shaped groove (2), so that the left wing (3) can move in a fan-shaped manner at various angles along the axis of the left wing shaft (4); one side is a right wing (5), and a right wing shaft (6) connected to the right wing (5) is formed on the right side of the "U"-shaped groove (2), so that the right wing (5) can move along the axis of the right wing shaft (6). The left wing (3) and the right wing (5) are spaced apart from each other on the left and right sides, and their widths of extension are roughly the same; the left wing (3) can be moved vertically or horizontally from 0 degrees horizontally to 90 degrees vertically toward the opening of the "U"-shaped groove (2); the right wing (5) can be moved vertically or horizontally from 90 degrees vertically to 0 degrees horizontally toward the opening of the "U"-shaped groove (2); the left wing (3) and the right wing (5) can both move vertically and parallelly above the "U"-shaped groove (2) in response to the external force applied, and the two wings can reach a state of being vertically parallel to the plane of the "U"-shaped groove (2); the left wing (3) and the right wing (5) can also both move outwardly toward the opening of the "U"-shaped groove (2) in a plane in response to the external force applied, and reach a state where the two wings are in a horizontal straight line; The left wing (3) is fixed to the edge of the left wing fixing base plate (7) in the middle half of the fuselage of the display device through a plurality of left wing fixing holes (8), and the longitudinal length of the left wing (3) is equivalent to the width of the left wing fixing base plate (7); the right wing (5) is fixed to the edge of the right wing fixing base plate (9) in the other half of the fuselage of the display device through a plurality of right wing fixing holes (10), and the longitudinal length of the right wing (5) is equivalent to the width of the right wing fixing base plate (9); the left wing fixing base plate (7) and the right wing fixing base plate (9) are opposite to each other and are fixed to the left wing (3) and the right wing (5); at this point, the "U"-shaped groove (2) is hinged to the left wing fixing base plate (7) and the right wing fixing base plate (9) opposite to the two half fuselages of the display device through the left wing (3) and the right wing (5), thus forming the basic support structure of the hinge; The "U"-shaped groove (2) is half an arc-shaped, and the "screen space" in which the OLED flexible liquid crystal display screen (11) enters when it is in an inwardly folded and bent state; the space in the "U"-shaped groove (2) is similar to the size and depth of the inward bending arc R of the OLED flexible liquid crystal display screen (11) entering therein, measured in millimeters, but they are not equal, and the depth cannot be filled by it, and a considerable amount of space is left in the "U"-shaped groove (2); the width of the OLED flexible liquid crystal display screen (11) is just equal to the width of the inner wall of the "U"-shaped groove (2), and it fits closely in the "U"-shaped groove (2) and can enter and exit smoothly.

2. The nest-type folding screen hinge without creases according to claim 1 is characterized in that: A bottom groove (12) with a width of about two millimeters is opened at the longitudinal bottom of the "U"-shaped groove (2). The bottom groove (12) leads to the outside, and the length of the bottom groove (12) is shorter than the length of the "U"-shaped groove (2).

3. The nest-type folding screen hinge without creases according to claim 1, characterized in that: A plurality of left semicircular teeth (13) and right semicircular teeth (14) are evenly spaced and formed on both sides of the bottom groove (12) from the middle of the arc outside the "U"-shaped groove (2) and the same length as the longitudinal direction of the "U"-shaped groove (2). The R size of the left semicircular teeth (13) and the right semicircular teeth (14) is measured in millimeters.

4. The horizontal nest type folding screen hinge without creases according to claim 1, characterized in that: A plurality of arc-shaped left wing housing grooves (17) and right wing housing grooves (18) are formed on the inside of the lower part of the left wing housing (15) and the right wing housing (16) of the display device connected to the left wing (3) and the right wing (5), the left wing fixed substrate (7) and the right wing fixed substrate (9); the left wing housing grooves (17) and the right wing housing grooves (18) are opposite to the left semicircular teeth (13) and the right semicircular teeth (14) in concave and convex manner and have the same length; when the left wing housing (15) and the right wing housing (16) are at the same or close to the horizontal line state of 180 degrees, their tails are butted against each other, and at the same time, the left The outer shell groove (17) at the wing and the outer shell groove (18) at the right wing are respectively matched with the corresponding left semicircular teeth (13) and right semicircular teeth (14) to generate friction force. The magnitude of the friction force depends on the closeness of the fit between the outer shell groove (17) at the left wing and the outer shell groove (18) at the right wing and the left semicircular teeth (13) and the right semicircular teeth (14), as well as the thickness of the material of the outer shell groove (17) at the left wing and the outer shell groove (18) at the right wing, and the magnitude of the elastic tension. The friction sliding with damping is limited, which can be the basic condition for the driven outer shell (15) at the left wing and the outer shell (16) at the right wing to hover at multiple angles.

5. The nest-type folding screen hinge without creases according to claim 4 is characterized in that: At the ends of the left wing housing (15) and the right wing housing (16), i.e., the outer sides of the left wing housing groove (17) and the right wing housing groove (18), a left arc-shaped hook (19) and a right arc-shaped hook (20) are respectively formed, and the hook lengths of the left arc-shaped hook (19) and the right arc-shaped hook (20) are measured in millimeters; when the left wing housing (15) and the right wing housing (16) are in the same or close to 180 degrees horizontal line state, when their tails are butted against each other, the first thing to be abutted is the two sides of the left arc-shaped hook (19) and the right arc-shaped hook (20); and at this time, the left arc-shaped hook (19) and the right arc-shaped hook (20) just fall into and get stuck in the bottom groove (12) at the bottom of the "U"-shaped groove (2), and push up.

6. The horizontal nest type folding screen hinge without creases according to claim 1, characterized in that: A covering membrane (21) is formed to cover the "U"-shaped groove (2). The width of the covering membrane (21) is equal to the width of the "U"-shaped groove (2), and is exactly equal to the width of the OLED flexible liquid crystal display screen (11). The covering membrane (21) can lie in the "U"-shaped groove (2). The covering membrane (21) is closely attached to the bend R of the OLED flexible liquid crystal display screen (11) and is pushed into the groove by the bend R of the OLED flexible liquid crystal display screen (11). The covering membrane (21) The rubber material is relatively thin, has good elasticity and flexibility, and the hardness of the rubber material is less than 20 degrees under the Shore hardness test; the covering membrane (21) surrounds the outside of the left wing (3) and the right wing (5) through the plane of the "U"-shaped groove (2), and is clamped inside the left wing (3) and the right wing (5) and the left wing fixing base plate (7) and the right wing fixing base plate (9), and is fixed together through a plurality of left wing fixing holes (8) and a plurality of right wing fixing holes (10); The covering membrane (21) is loosened or tightened in accordance with the changes in the arc tension of the left wing (3) and the right wing (5): when the bend R of the OLED flexible liquid crystal display (11) enters the "U"-shaped groove (2), the covering membrane (21) is relatively loose, and the OLED flexible liquid crystal display (11) lightly pushes the covering membrane (21) into the groove; when the bend R of the OLED flexible liquid crystal display (11) slides out of the "U"-shaped groove (2), the covering membrane (21) is relatively straightened and tightened, and the elastic force is increased, which also has the effect of supporting the OLED flexible liquid crystal display (11) outward.

7. The nest-type folding screen hinge without creases according to claim 1, characterized in that: A liquid-filled air bag (22) having a size equivalent to the bottom half of the space inside the "U"-shaped groove (2) is provided. The liquid-filled air bag (22) is coated with a composite thermoplastic rubber material having good fluidity, good resilience, anti-skid and wear resistance and is inflated. The coating rubber material is required to have excellent air tightness to prevent air leakage after long-term use. The hardness of the rubber material is less than 10 degrees under a Shore hardness tester. When the bend R of the OLED flexible liquid crystal display screen (11) enters the "U"-shaped groove (2), the liquid filling gas capsule (22) is at the bottom and is only slightly resisted; when the bend R of the OLED flexible liquid crystal display screen (11) disappears and becomes flat, the liquid filling gas capsule (22) is in a half-filled and relaxed state; and when the outer shell (15) at the left wing and the outer shell (16) at the right wing are simultaneously subjected to force, and their respective tails, i.e., the left arc-shaped hook (19) and the right arc-shaped hook (20), fall into and are stuck in the bottom groove (12) at the bottom of the "U"-shaped groove (2), the liquid filling gas capsule (22) is squeezed by the inserted foreign matter, and the "U"-shaped groove (2) is filled with the liquid filling gas capsule (22) therein, or is in a saturated state of being filled, so that the OLED flexible liquid crystal display screen (11) is supported to be lifted up at the folded part, so that its flatness is not affected by collapse and deformation due to touch.

8. The horizontal nest type folding screen hinge without creases according to claim 1, characterized in that: A plurality of left wing exhaust holes (23) and right wing exhaust holes (24) with small apertures are arranged in a row at the upper part of both sides of the "U"-shaped groove (2) near the left wing (3) and the right wing (5). Since the interior of the "U"-shaped groove (2) is in a relatively closed state, air resistance will inevitably occur due to pressure difference during movement. The left wing exhaust holes (23) and the right wing exhaust holes (24) can discharge the blocked gas in the "U"-shaped groove (2), making the rotation smooth, and at the same time, the damping effect of the rubber material can be reflected.

9. The horizontal nest type folding screen hinge without creases according to claim 1, characterized in that: A pressure sensor or a touch sensor (25) for turning the screen on or off, or sensing human body or proximity may be placed inside the "U"-shaped groove (2), but is not limited to being placed therein. The wiring (26) of the power circuit may pass through the adjacent left wing exhaust hole (23) and right wing exhaust hole (24) to reach the main board circuit.

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