Crease-free folding screen hinge with pressure-controlled hovering function
By designing a hinge with a grooved flexible structure, combining liquid filling capsules and covering film, the problems of easy damage, crease, large weight and high cost of hinges of existing electronic folding display equipment are solved, and fold-free and waterproof , dustproof, bump resistance, and easy maintenance effect.
Patent Information
- Application Number
- CN202410316323.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-17
- Filing Date
- 2024-02-27
- Publication Date
- 2024-12-17
AI Technical Summary
The hinge structure of existing electronic folding display equipment has problems such as crease, large weight, high cost, easy to damage, non-waterproof, and difficult to repair, resulting in broken screen folding, liquid leakage and scrapped, and high maintenance costs.
Design a hinge with grooved flexible structure, a support body made of metal or high-strength hard synthetic plastic, with rigid, ultra-thin and lightweight properties, combined with liquid filling capsules and covering film to achieve no folding Folding screen hinge structure that is trace-proof, waterproof, dust-proof and fall-resistant.
It achieves the effects of no crease, light weight, low cost, long life, waterproof and dustproof, and simple maintenance, enhances the ability of the hinge to resist falling and reduces the maintenance cost.
Smart Images
Figure CN119155929A_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a folding screen without creases and a hinge with a pressure-controlled hovering function, and 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, with precise manufacturing processes, complex transmission mechanisms, many parts, high costs, heavy weight, and thick thickness; the hinges are exposed to the outside, are not waterproof and are easily infiltrated by dust; creases and wrinkles will inevitably appear at the folding point, and the lifespan is not long; their fragility when not dropped can easily damage the hinge components, causing the screen to break at the folding point, leaking liquid, and being scrapped; and the maintenance cost is high.
[0003] Purpose of the Invention
[0004] The purpose of the present invention is to design a folding screen hinge with a flexible structure with an inner groove, which has no creases, is light in weight, thin in thickness, low in cost, resistant to falling and collision, has good airtightness, is easy to maintain, and is waterproof and dustproof. Summary of the invention
[0005] The present invention is composed of a support body 1 and its specific material, special structure and special accessories. The support body 1 is made of metal or high-strength hard synthetic plastic, which has the characteristics of toughness, ultra-thinness and light weight. The main body of the support body 1 is formed into a semicircular R "U"-shaped groove 2 with two ends of the upper opening blocked, which is long and has a straight opening on all sides and is in the same horizontal plane. The lateral sides of the "U"-shaped groove 2 extend outwards to form two wing spans, one side is a left wing 3, and the left side of the "U"-shaped groove 2 is formed with a left wing shaft 4 connected to the left wing 3, 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 the right side of the "U"-shaped groove 2 is formed with a right wing shaft 6 connected to the right wing 5, so that the right wing 5 can move in a fan-shaped manner at various angles along the axis of the right wing shaft 6. The left wing 3 and the right wing 5, which are opposite to each other on the left and right, have roughly the same width when extended outward. The left wing 3 can be erected or moved in a horizontal line from 0 degrees horizontally to 90 degrees vertically toward the opening of the "U"-shaped groove 2; the right wing 5 can be erected or moved in a horizontal line 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 accordance with the external force applied at the same time, 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 in a plane outwardly toward the opening of the "U"-shaped groove 2 in accordance with the external force applied at the same time, 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; the longitudinal length of the right wing 5 is equivalent to the width of the right wing fixing base plate 9. The left wing fixed substrate 7 and the right wing fixed substrate 9 are fixed to the left wing 3 and the right wing 5 relative to each other; thus, the basic support structure of the hinge is formed. The "U"-shaped groove 2 is half an arc, which is the "screen space" where the OLED flexible screen 11 enters in a teardrop shape when it is in the inward folded state. Since the arc R of the OLED flexible screen 11 lies in the "U"-shaped groove 2 when it is folded inward, its bending curvature is not suppressed by the stress of the "hard top of the metal hinge", so that the bending stress of the inner bending arc R of the OLED flexible screen 11 is fully accommodated, and the stress is completely released and restored to a flat state when leaving. 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. A plurality of left semicircular teeth 13 and right semicircular teeth 14 are evenly and evenly formed on both sides of the bottom groove 12 from the middle of the arc outside the U-shaped groove (2) and are equal in length to the longitudinal direction of the U-shaped groove 2. 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 fixed to the left wing 3 and the right wing 5, the left wing fixing substrate 7 and the right wing fixing substrate 9.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, and their respective halves are perfectly matched. 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, which 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 film 21 is made to cover the top of the "U"-shaped groove 2. The width of the covering film 21 is just the same as that of the OLED flexible screen 11, and both can lie inside the "U"-shaped groove 2. The covering film 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 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 the same size as the bottom half of the space inside the "U"-shaped groove 2. When the bend R of the OLED flexible 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 screen 11 disappears and becomes flat, the liquid filling capsule 22 is in a half-filled and relaxed state; 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 full or tends to be full in the "U"-shaped groove 2. The saturated state supports the OLED flexible 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. Electronic devices such as pressure sensors or touch sensors 25 for turning on or off the screen, human body sensing or proximity can be placed inside the "U"-shaped groove 2, but are not limited to being placed. The wiring 26 of its power circuit can pass through the left wing exhaust holes 23 and the right wing exhaust holes 24 close to it to reach the main board circuit.
[0006] The screen of the present invention has an inner lying space and an elastic structure, and can freely store and release stress. It has the characteristics of orderly torsion, seamless folding, light weight, low cost, long service life, good damping feel, and resistance to drop and collision and waterproof and dustproof. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a front cross-sectional view of the present invention.
[0008] Figure 2 It is a plan 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 closed state schematic diagram of the present invention.
[0011] Figure 5 It is a schematic diagram of the semi-open and closed hovering state of the present invention.
[0012] Figure 6 It is a schematic diagram of the fully opened state of the present invention.
[0013] Figure 7 It is a three-dimensional cross-sectional view of the support body and a display of the positions of the fixing holes, pressure sensor, and exhaust holes. DETAILED DESCRIPTION
[0014] Embodiment: This embodiment is composed of a support body 1 and its specific material, special structure and special accessories. The support body 1 is made of metal or high-strength hard synthetic plastic, which has the characteristics of toughness, ultra-thinness and light weight. The main body of the support body 1 is formed into a semicircular R "U"-shaped groove 2 with both ends of the upper opening blocked. It is long and has a straight opening on all sides and is in the same horizontal plane. The lateral sides of the "U"-shaped groove 2 extend outward and have two wing spans. One side is a left wing 3. 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. 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 in a fan-shaped manner at various angles along the axis of the right wing shaft 6. The left wing 3 and the right wing 5, which are opposite to each other on the left and right sides, have roughly the same width when extended outward. The left wing 3 can be erected or moved horizontally from 0 degrees horizontally to 90 degrees vertically toward the opening of the "U"-shaped groove 2; the right wing 5 can be erected or moved 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 accordance with 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 accordance with the external force applied at the same time, and reach a state where the two wings are in a horizontal straight line.
[0015] The left wing 3 is fixed to the edge of the left wing fixing base plate 7 in the middle half of the display device through a plurality of left wing fixing holes 8. 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 display device through a plurality of right wing fixing holes 10. 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 fixed relative to each other and docked with the left wing 3 and the right wing 5; so far, the "U"-shaped groove 2 is hinged to the left wing fixing base plate 7 and the right wing fixing base plate 9 relative to the two half fuselages of the display device through the left wing 3 and the right wing 5, which constitutes the basic support structure of its hinge.
[0016] The U-shaped groove 2 is half an arc, which is the "screen space" where the OLED flexible screen 11 enters in a water drop shape when it is in the inward folded state. The space in the U-shaped groove 2 is similar to the size and depth of the inner bending arc R of the OLED flexible screen 11 entering it, measured in millimeters, but not equal, especially the depth cannot be filled by it, and there is still a considerable amount of space in the U-shaped groove 2. The width of the OLED flexible screen 11 is just the same as the width of the inner wall of the U-shaped groove 2, and it fits in the U-shaped groove 2 closely and can enter and exit smoothly. Since the arc R of the OLED flexible screen 10 lies in the "U"-shaped groove 2 when folded inward, its bending curvature is not suppressed by the stress of the "hard metal hinge", so the bending stress of the inner bending arc R of the OLED flexible screen 11 is fully contained, and the stress is completely released and restored to a flat state when it leaves. Therefore, this OLED flexible screen 11 has no cause for creases, and will not produce creases or even damage.
[0017] 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. The length of the bottom groove 12 is shorter than the length of the "U"-shaped groove 2.
[0018] 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 longitudinal length 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.
[0019] A plurality of arc-shaped left wing housing grooves 17 and right wing housing grooves 18 are formed inside 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, and have the same length. When the left wing shell 15 and the right wing shell 16 are at the same or close to the horizontal line state of 180 degrees, their tails are butted against each other, and their respective halves are perfectly matched. 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 right semicircular teeth 14, and friction is generated. The magnitude of this friction depends on the closeness of the fit between the left wing shell groove 17 and the right wing shell groove 18 and the left semicircular teeth 13 and the right semicircular teeth 14, as well as the thickness of the material of the left wing shell groove 17 and the right wing shell groove 18 themselves, and the magnitude of the elastic tension, and is limited to friction sliding with damping; this can be the basic condition for the driven left wing shell 15 and the right wing shell 16 to hover at multiple angles.
[0020] 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, there are respectively formed a left arc-shaped barb 19 and a right arc-shaped barb 20. The hook lengths of the left arc-shaped barb 19 and the right arc-shaped barb 20 are measured in millimeters. When the left wing housing 15 and the right wing housing 16 are in the same or close to the horizontal line state of 180 degrees, when their tails are butted against each other, the first thing that collides is 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 get stuck in the bottom groove 12 at the bottom of the "U"-shaped groove 2, and push up.
[0021] A covering film 21 is made to cover the "U"-shaped groove 2. The width of the covering film 21 is equal to the width of the "U"-shaped groove 2, and is just equal to the width of the OLED flexible screen 11, and both can lie inside the "U"-shaped groove 2. The covering film 2 is tightly fitted to the bend R of the OLED flexible screen 11, and is the first to be pushed into the groove by the bend R of the OLED flexible screen 11. The covering film 21 is made of rubber material, and its thickness is relatively thin, and its elasticity, flexibility, and stretchability are good. The hardness of the rubber material is less than 20 degrees under the Shore hardness tester test. The covering film 20 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 fixing holes 8 and a number of right wing fixing holes 10.
[0022] The covering film 21 changes in tightness and looseness as the arc tension of the left wing 3 and the right wing 5 changes: when the bend R of the OLED flexible screen 11 enters the "U"-shaped groove 2, the covering film 21 is relatively loose, and the OLED flexible screen 11 lightly pushes the covering film 21 into the groove; when the bend R of the OLED flexible screen 11 slides out of the "U"-shaped groove 2, the covering film 21 is relatively stretched and tightened, and the elastic force increases, which also has the effect of supporting the OLED flexible screen 11 outward.
[0023] A liquid-filled air bag 22 is provided, which is equivalent to the bottom half of the space inside the "U"-shaped groove 2. The liquid-filled air bag 22 is coated with a composite thermoplastic rubber material with good fluidity, good resilience, non-slip and wear resistance and inflated. The coating colloid 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 the Shore hardness tester;
[0024] When the bend R of the OLED flexible screen 11 enters the "U"-shaped groove 2, the liquid-filled air bag 22 is at the bottom and is only lightly resisted; when the bend R of the OLED flexible screen 11 disappears and becomes flat, the liquid-filled air bag 22 is in a semi-filled and relaxed state; 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-filled air bag 22 is squeezed by the inserted foreign matter, and the "U"-shaped groove 2 is filled with the liquid-filled air bag 22 therein, or tends to be full and saturated, which supports the OLED flexible screen 11 to be lifted up at the folded part so as not to affect its flatness due to touch collapse and deformation.
[0025] 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 small-diameter left wing exhaust holes 23 and right wing exhaust holes 24. Because 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 also reflecting the damping effect of the rubber material.
[0026] Electronic devices such as pressure sensors or touch sensing sensors 25 for turning the screen on or off, general sensing or proximity sensing may be placed inside the "U"-shaped groove 2, but are not limited to being placed therein. The wiring 26 of the power circuit may pass through the left wing exhaust hole 23 and the right wing exhaust hole 24 adjacent thereto to reach the main board circuit.
Claims
1. A folding screen without creases and with a pressure-controlled hovering function hinge, comprising a supporting body (1) and its specific material, special structure and special accessories, 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-circular in shape, and the "screen space" is where the OLED flexible screen (11) enters in a water drop shape when it is in an inwardly folded and bent state; the space in the "U"-shaped groove (2) is similar in size and depth to the inwardly folded arc R of the OLED flexible screen (11) entering therein, measured in millimeters, but not equal, especially 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 screen (11) is just the same as the width of the inner wall of the "U"-shaped groove (2). Rather, it fits snugly in the "U"-shaped groove (2) and can be smoothly moved in and out; because the arc R of the OLED flexible screen (11) lies in the "U"-shaped groove (2) when it is folded inwardly, and its bending arc is not suppressed by the stress of the "hard top of the metal hinge", so that the bending stress of the inner bending arc R of the OLED flexible screen (11) is fully absorbed, and the stress is completely released and restored to a flat state when it is released. Therefore, this OLED flexible screen (11) does not have the cause of creases, and will not have creases or even damage.
2. The folding screen without creases with pressure-controlled hovering function hinge according to claim 1, 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 folding screen without creases with pressure-controlled hovering function hinge 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 folding screen without creases with pressure-controlled hovering function hinge 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 inside 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 in the same or close to 180 degrees horizontal line state, their tails are butted against each other, and their halves are perfectly connected. At the same time, the outer shell groove (17) at the left 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), and friction force is generated. The magnitude of this 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 folding screen without creases with pressure-controlled hovering function hinge according to claim 4, 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 folding screen without creases with pressure-controlled hovering function hinge according to claim 1, characterized in that: A covering film (21) is formed to cover the "U"-shaped groove (2); the width of the covering film (21) is equal to the width of the "U"-shaped groove (2), and is exactly equal to the width of the OLED flexible screen (11), and can lie inside the "U"-shaped groove (2); the covering film (21) is closely attached to the bend R of the OLED flexible screen (11), and is the first to be pushed into the groove by the bend R of the OLED flexible screen (11); the covering film (21) is made of rubber The thickness is relatively thin, and the elasticity, flexibility, i.e., stretchability, is good. The hardness of the rubber material is less than 20 degrees under the Shore hardness test. The covering rubber film (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 film (21) changes in tightness and looseness as the arc-shaped tension of the left wing (3) and the right wing (5) changes: when the bend R of the OLED flexible screen (11) enters the "U"-shaped groove (2), the covering film (21) is relatively loose, and the OLED flexible screen (11) lightly pushes the covering film (21) into the groove; when the bend R of the OLED flexible screen (11) slides out of the "U"-shaped groove (2), the covering film (21) is relatively stretched and tightened, and the elastic force increases, which also has the effect of supporting the OLED flexible screen (11) outward.
7. The folding screen without creases with pressure-controlled hovering function hinge 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, non-slip 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 the Shore hardness test. When the bend R of the OLED flexible screen (11) enters the "U"-shaped groove (2), the liquid-filled airbag (22) is at the bottom and is only slightly resisted; when the bend R of the OLED flexible screen (11) disappears and becomes flat, the liquid-filled airbag (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 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-filled airbag (22) is squeezed by the inserted foreign matter, and the "U"-shaped groove (2) is filled with the liquid-filled airbag (22) therein, or is in a saturated state of being filled, so that the OLED flexible 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 folding screen without creases with pressure-controlled hovering function hinge 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 folding screen without creases with a pressure-controlled hovering function hinge according to claim 1, characterized in that: The U-shaped groove (2) may be equipped with, but not limited to, electronic devices such as pressure sensors or touch sensors (25) for turning the screen on or off, sensing human body or proximity, and 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.