A screen folding mechanism

Abstract

The present invention proposes a screen folding mechanism, including a left hinge, a right hinge, a left telescopic plate, a linkage gear, a gear connecting rod, a right telescopic plate, a fixed column, a pin column, a fixed column cover plate, a meshing gear cover plate, a left fixed wing and a right fixed wing; the left telescopic plate is arranged on the left hinge, the right part of the left telescopic plate is a linkage section with a linkage rack on the bottom surface, the linkage gear is respectively meshed with the linkage rack and the left hinge transmission rack, and the linkage gear is rotatably connected with the fixed column through the gear connecting rod; the connection mode of the right telescopic plate is also the same; when the hinge rotates downward, the transmission rack drives the linkage gear to rotate and then drives the linkage section to move in the direction close to the fixed column, that is, keeps synchronization with the position change of the inner and outer sides of the bend. The present invention makes the screen rotation feel more lubricated, not only significantly improves the operating experience, but also greatly reduces the manufacturing cost, and is suitable for any technology that requires folding the screen, including folding mobile phones.

Description

Technical Field

[0001] The invention belongs to the field of communication technology, and in particular relates to a screen folding mechanism. Background Art

[0002] As flexible folding screen technology matures, the replacement speed of electronic products accelerates, and flexible folding terminal products will be the future development trend of electronic products. For folding mobile phones, they use a continuously foldable flexible screen, and a special folding mechanism is set in the bending and deforming part of the screen. The folding mechanism makes the mobile phone like a "Transformer". The screen is still the size of a traditional mobile phone when folded, which is convenient to carry. When opened, it becomes a tablet computer, which has both entertainment and office functions, and caters to the current consumer's pursuit of portability and multifunctional unity. In addition to the flexible AMOLED screen being the key breakthrough for folding mobile phones, the screen folding structure is also a bottleneck in development. In the existing folding method, whether it is folded inward or outward, after the screen is bent, the bent part still needs to maintain a certain R angle, otherwise the screen will be damaged. Because when bending, the inner side of the bend will have a slight relative distance extension, and the outer side will have a slight relative distance shortening, so the folding structure must also keep changing synchronously, otherwise the screen will be squeezed. Chinese patent application No. 201920305522.0 discloses a folding display device, in which the folding plate disclosed is relatively long and fixed to each other at both ends. When folded, there is a defect that the folding warps easily and cannot be kept flat. Chinese patent application No. 201910789479.4 discloses a folding display device and a folding mobile phone. By setting a rotating seat, a transmission member, a connecting seat, a driving rod and a linkage rod that links the above three, when the connecting seat rotates, the driving rod naturally rotates and drives the transmission member to move on the rotating seat, and then the connecting seat is linked to the linkage rod, so that the position between the connecting seats on both sides of the folding hinge changes relatively, and then the length change of the inner and outer arc surfaces caused by the folding of the folding screen is adjusted to avoid damage. However, since the technology uses a folding hinge to adjust the position change between the connecting seats on both sides, the folding hinge is easy to get stuck during transmission, resulting in the rotation of the folding screen being not smooth, affecting the consumer's operating experience, and the structure of the folding chain is delicate, and a specific slide needs to be set accordingly. The processing cost of the folding chain and the slide is high, so it is necessary to improve it. Summary of the invention

[0003] Although the existing folding mechanism can adapt to the change that the inner length of the folding screen becomes smaller and the outer length becomes larger after folding, thus avoiding damage to the folding screen, its rotation is not lubricated, the smoothness is poor, the user experience is poor, and the processing cost is high. In order to solve the above defects, the present invention proposes a screen folding mechanism.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A screen folding mechanism, comprising: a left hinge, a right hinge, a left telescopic plate, a right telescopic plate, a fixed column, a linkage gear, a gear connecting rod, a pin column, a fixed column cover plate, a meshing gear cover plate, a left fixed wing and a right fixed wing;

[0006] A slide is provided at the left end of the left hinge, and the upper and lower ends of the slide are bent to form two opposite slide grooves. An elastic clamping structure and a left hinge transmission rack are provided on the upper surface of the slide, and a plurality of left hinge guide teeth are provided at the right end of the left hinge;

[0007] The left telescopic plate is arranged on the slide table through an elastic clamping structure. The upper and lower ends of the left telescopic plate can slide or stay in the two slide grooves. The right part of the left telescopic plate is a linkage section. The bottom surface of the linkage section is provided with a linkage rack. The linkage gear is arranged between the linkage rack and the left hinge transmission rack. The linkage gear is rotatably connected to the fixed column through a gear connecting rod. The linkage gear is respectively meshed with the linkage rack and the left hinge transmission rack.

[0008] The left end of the right hinge is provided with a plurality of right hinge guide teeth, the structure of the right end is the same as that of the slide, and the right telescopic plate is arranged at the right end of the right hinge, and its connection method is the same as that of the left telescopic plate;

[0009] The fixing column includes a connecting column, the upper surface of the connecting column is a plane, a plurality of connecting teeth are arranged below the plane, a pin column fixing seat is arranged in the first and last connecting teeth respectively, and a receiving groove is formed between two adjacent connecting teeth at the bottom;

[0010] A number of stop blocks are provided on the fixed column cover;

[0011] The upper and lower end surfaces of the left end of the left fixed wing are respectively provided with longitudinal first limit columns, the right end is fixed with a left meshing gear, and the left fixed wing is provided with a left transverse limit waist-shaped hole;

[0012] A right meshing gear is fixed to the left end of the right fixed wing, and longitudinal second limiting columns are respectively arranged on the upper and lower end surfaces of the right end, and a right transverse limiting waist-shaped hole is arranged on the right fixed wing;

[0013] A left fixed wing mounting groove is provided at the bottom of the left hinge, and longitudinal limit sliding grooves are respectively provided on the two inner walls opposite to the left fixed wing mounting groove, and a right fixed wing mounting groove of the same structure is provided at the corresponding position of the right hinge, and transverse limit columns are provided on both the left fixed wing mounting groove and the right fixed wing mounting groove; the left fixed wing is arranged in the left fixed wing mounting groove and the first limit column is located in the longitudinal limit sliding groove, the right fixed wing is correspondingly arranged in the right fixed wing mounting groove, and the two transverse limit columns are respectively located in the left transverse limit waist-shaped hole and the right transverse limit waist-shaped hole;

[0014] The connecting column is pressed onto the left hinge and the right hinge, and the connecting teeth are inserted into the gap formed by the left hinge guide teeth and the right hinge guide teeth. The fixed column cover plate is fixedly connected to the bottom surface of the connecting column to form a slideway. The pin column is passed through the slideway and the two ends are fixedly connected to the two pin column fixing seats. The left hinge and the right hinge are slidably matched with the pin column through the left hinge guide teeth and the right hinge guide teeth respectively; the left meshing gear and the right meshing gear are arranged in the accommodating groove, and the meshing gear cover plate is fixedly connected to the bottom surface of the accommodating groove.

[0015] Preferably, a mounting shaft is provided on the linkage gear, the mounting shaft is rotatably connected to one end of the gear connecting rod, and the other end of the gear connecting rod is rotatably connected to the fixing column.

[0016] More preferably, a left connecting seat for rotationally connecting to the gear connecting rod is provided on the left side of the fixing column, and a right connecting seat is correspondingly provided on the right side.

[0017] Most preferably, the elastic clamping structure includes a accommodating portion and a rim mounting shaft, a rim, a pressing platform and an elastic member arranged in the accommodating portion, a notch is provided at the upper portion of the accommodating portion, the rim is arranged adjacent to the notch through the rim mounting shaft, the upper portion of the rim passes through the notch and is located outside the accommodating portion, and the lower portion contacts with one end of the pressing platform, and a number of elastic members are arranged at the other end of the pressing platform; a slide is respectively provided on the bottom surfaces of the upper and lower ends of the left telescopic plate, and on the inner side surface of the slide at the upper end, the left telescopic plate is connected to the slide by being clamped into the fixed nest through the upper portion of the rim.

[0018] The present invention uses a gear transmission mechanism to replace the traditional hinge transmission mechanism. The precisely calculated linkage structure allows the upper and lower surfaces of the screen to change in relative length with different folding angles, and then maintain a constant relative position with the screen, so that the screen can be kept flat at any time during flipping. Compared with the prior art, the rotation feel of the present invention is smoother, which not only significantly improves the user's operating experience, but also greatly reduces the manufacturing cost, achieving a super high cost performance, and is suitable for any communication field that requires the screen to be folded, including folding mobile phones. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the structure of parts of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 4 The three-dimensional Figure 1 ;

[0024] Figure 5 The three-dimensional Figure 2 .

[0025] In the figure: 1, left hinge; 11, slide; 111, slide groove; 112, accommodating portion; 113, left hinge transmission rack; 114, wheel rim mounting shaft; 115, wheel rim; 116, press table; 117, elastic member; 12, left hinge guide tooth; 13, left fixed wing mounting groove; 131, longitudinal limit slide groove; 14, transverse limit column; 2, right hinge; 3, left telescopic plate; 31, linkage section; 32, linkage gear; 3 3. Gear connecting rod; 4. Right telescopic plate; 5. Fixed column; 51. Connecting teeth; 52. Left connecting seat; 53. Right connecting seat; 54. Accommodating groove; 55. Pin fixing seat; 56. Connecting column; 6. Fixed column cover; 61. Stop block; 7. Meshing gear cover; 8. Left fixed wing; 81. First longitudinal limit column; 82. Left meshing gear; 9. Right fixed wing; 91. Second longitudinal limit column; 92. Right meshing gear. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 , Figure 2 , Figure 3The screen folding mechanism is shown in common: it includes: a left hinge 1, a right hinge 2, a left telescopic plate 3, a linkage gear 32, a gear connecting rod 33, a right telescopic plate 4, a fixed column 5, a pin column, a fixed column cover plate 6, a meshing gear cover plate 7, a left fixed wing 8 and a right fixed wing 9; a slide 11 is provided at the left end of the left hinge 1, and the upper and lower ends of the slide 11 are bent to form two opposite slide grooves 111, an elastic clamping structure and a left hinge transmission rack 113 are provided on the upper surface of the slide 11, and the right end of the left hinge 1 is provided with some The left telescopic plate 3 is arranged on the slide 11 through an elastic clamping structure. The upper and lower ends of the left telescopic plate 3 can slide or stay in the two slide grooves 111. The right part of the left telescopic plate 3 is a linkage section 31. The bottom surface of the linkage section 31 is provided with a linkage rack. The linkage gear 32 is arranged between the linkage rack and the left hinge transmission rack 113. The linkage gear 32 is rotatably connected to the fixed column 5 through a gear connecting rod 33. The linkage gear 32 is respectively meshed with the linkage rack and the left hinge transmission rack 113; the right The left end of the hinge 2 is provided with a plurality of right hinge guide teeth, and the structure of the right end is the same as that of the slide 11. The right telescopic plate 4 is arranged at the right end of the right hinge 2, and the connection mode between the right telescopic plate 4 and the right hinge 2 is the same as the connection mode between the left telescopic plate 3 and the left hinge 1; the fixing column 5 includes a connecting column 56, the upper surface of the connecting column 56 is a plane, and a plurality of connecting teeth 51 are arranged below the plane, and a pin fixing seat 55 is respectively arranged in the first and last connecting teeth 51, and a receiving groove 54 is formed between the two adjacent connecting teeth 51 at the bottom; A plurality of stop blocks 61 are provided on the fixed column cover plate 6 (to prevent the left hinge 1 and the right hinge 2 from further rotating at a negative angle after they are rotated to the horizontal direction); a longitudinal first limit column 81 is provided on the upper and lower end faces of the left end of the left fixed wing 8, a left meshing gear 82 is fixed on the right end, and a left transverse limit waist-shaped hole is provided on the left fixed wing 8; a right meshing gear 92 is fixed on the left end of the right fixed wing 9, a longitudinal second limit column 91 is provided on the upper and lower end faces of the right end, and a right transverse limit waist-shaped hole is provided on the right fixed wing 9;

[0028] A left fixed wing mounting groove 13 is provided at the bottom of the left hinge 1, and longitudinal limiting sliding grooves 131 are respectively provided on the two inner walls opposite to the left fixed wing mounting groove 13, and a right fixed wing mounting groove of the same structure is provided at the corresponding position of the right hinge 2, and transverse limiting columns 14 are provided on both the left fixed wing mounting groove 13 and the right fixed wing mounting groove; the left fixed wing 8 is arranged in the left fixed wing mounting groove 13 and the first limiting column 81 is located in the longitudinal limiting sliding groove 131, and the right fixed wing 9 is correspondingly arranged in the right fixed wing mounting groove, and the two transverse limiting columns 14 are respectively located in the left transverse limiting waist-shaped hole and the right transverse limiting waist-shaped hole;

[0029] The connecting column 56 is pressed onto the left hinge 1 and the right hinge 2, and the connecting tooth 51 is inserted into the gap formed by the left hinge guide tooth 12 and the right hinge guide tooth. After the fixed column cover plate 6 is fixedly connected to the bottom surface of the connecting column 56, a slideway is formed. The pin is passed through the slideway and the two ends are fixedly connected to the two pin fixing seats 55. The left hinge 1 and the right hinge 2 are slidably matched with the pin through the left hinge guide tooth 12 and the right hinge guide tooth respectively; the left meshing gear 82 and the right meshing gear 92 are arranged in the accommodating groove 54, and the accommodating groove 54 is provided with a groove for placing the meshing gear shaft (not shown in the figure). After the meshing gear cover plate 7 is fixedly connected to the bottom surface of the accommodating groove 54, the left meshing gear 82 and the right meshing gear 92 can rotate and mesh in the accommodating groove 54.

[0030] Working principle: The left hinge 1 forms a lower left connection seat at the bottom, and the left telescopic plate 3 forms an upper left connection seat at the top. When the left hinge 1 rotates downward, the left hinge transmission rack 113 drives the linkage gear 32 to rotate, and then drives the linkage rack meshed with the linkage gear 32 to move in the direction close to the fixed column 5, and finally realizes the inward movement of the left telescopic plate, that is, the lower left connection seat (corresponding to the outer side of the bend) has a slight relative distance extension, and the upper left connection seat (corresponding to the inner side of the bend) has a slight relative distance shortening, which keeps pace with the changes when the screen is bent, helping to keep the folding screen flat at all times. The structure of the right hinge 2 is similar to that of the left hinge 1, and its distance adjustment mechanism is also the same, and the above-mentioned changes will also occur when it rotates. Since the left hinge 1 and the right hinge 2 are provided with a left fixed wing 8 and a right fixed wing 9 at the bottom, and the left fixed wing 8 and the right fixed wing 9 are meshed by gears, the left hinge 1 and the right hinge 2 can rotate at the same angle. A first longitudinal limit column 81 is arranged on the upper and lower end faces of the left end of the left fixed wing 8 to ensure the stability of the left fixed wing 8 in the longitudinal direction when it moves. A transverse limit column 14 is arranged in the left transverse limit waist-shaped hole to limit the transverse movement range of the left fixed wing 8; the setting principle of the right fixed wing 9 is the same.

[0031] In order to facilitate the installation of the linkage gear 32, as a preferred technical solution, in another embodiment of the present invention, a mounting shaft is provided on the linkage gear 32, a left connecting seat 52 is fixedly provided on the left side of the connecting column 56, and a right connecting seat 53 is correspondingly provided on the right side, the mounting shaft is rotatably connected to one end of the gear connecting rod 33, and the other end of the gear connecting rod 33 is rotatably connected to the left connecting seat 52 through a pin. The mounting structure of the linkage gear 32 on the right hinge 2 is also the same as above.

[0032] As a preferred technical solution, another embodiment of the present invention, the elastic clamping structure includes a receiving portion 112 and a rim mounting shaft 114, a rim 115, a pressing platform 116 and an elastic member 117 arranged in the receiving portion 112. A notch is provided at the upper portion of the receiving portion 112, and the rim 115 is arranged adjacent to the notch through the rim mounting shaft 114. The upper portion of the rim 115 passes through the notch and is located outside the receiving portion 112, and the lower portion contacts one end of the pressing platform 116. A plurality of elastic members 117 are arranged at the other end of the pressing platform 116; a slide is respectively provided on the bottom surfaces of the upper and lower ends of the left telescopic plate 3, and a fixed nest (not shown in the figure) is provided on the inner side surface of the slide at the upper end, and the left telescopic plate 3 is connected to the slide 11 by snapping the upper portion of the rim 115 into the fixed nest. The purpose of setting the elastic clamping structure is: first, to realize the connection between the left telescopic plate 3 and the slide 11 of the left hinge 1 (or the connection between the right telescopic plate 4 and the corresponding slide on the right hinge 2); second, when the left telescopic plate 3 slides horizontally on the slide 11, the upper part of the rim 115 will press the slideway so that the upper and lower ends of the left telescopic plate 3 are elastically clamped in the slide groove 111 for sliding.

[0033] like Figure 4 (front stereogram) and Figure 5 (Back stereogram) As shown: In order to connect with the screen, the left telescopic plate 3, the right telescopic plate 4 and the fixed column 5 are provided with a number of welding holes for connecting with the screen, circuit board, etc. and waist-shaped holes for conveniently following the parts, which will not be described one by one, and the positions of various holes are not limited and can be flexibly set according to actual needs. Similarly, the specific number and structure of the connecting teeth 51 below the fixed column 5, the left hinge guide teeth 12 of the left hinge 1, and the right hinge guide teeth of the right hinge 2 can be flexibly selected by those skilled in the art according to actual needs, and these are not within the scope of protection required by the present invention.

[0034] The above description is only a preferred embodiment of the present invention, and the directional words such as "left", "right", "up", and "down" used therein are for the convenience of explaining the structure of the present invention and are not used to limit the present invention; the structures not described in detail above all adopt the existing technology that can realize the described functions; any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screen folding mechanism, characterized in that: include: A left hinge (1), a right hinge (2), a left telescopic plate (3), a linkage gear (32), a gear connecting rod (33), a right telescopic plate (4), a fixing column (5), a pin column, a fixing column cover plate (6), a meshing gear cover plate (7), a left fixed wing (8) and a right fixed wing (9); A slide table (11) is provided at the left end of the left hinge (1), and the upper and lower ends of the slide table (11) are bent to form two opposite slide grooves (111). An elastic clamping structure and a left hinge transmission rack (113) are provided on the upper surface of the slide table (11), and a plurality of left hinge guide teeth (12) are provided at the right end of the left hinge (1); The left telescopic plate (3) is arranged on the slide table (11) through the elastic clamping structure. The upper and lower ends of the left telescopic plate (3) can slide or stay in the two slide grooves (111). The right part of the left telescopic plate (3) is a linkage section (31). The bottom surface of the linkage section (31) is provided with a linkage rack. The linkage gear (32) is arranged between the linkage rack and the left hinge transmission rack (113). The linkage gear (32) is rotatably connected to the fixed column (5) through the gear connecting rod (33). The linkage gear (32) is respectively meshed with the linkage rack and the left hinge transmission rack (113); The left end of the right hinge (2) is provided with a plurality of right hinge guide teeth, and the structure of the right end is the same as that of the slide (11). The right telescopic plate (4) is arranged at the right end of the right hinge (2), and the connection method between the right hinge (2) and the right hinge (2) is the same as the connection method between the left telescopic plate (3) and the left hinge (1); The fixing column (5) comprises a connecting column (56), the upper surface of the connecting column (56) is a plane, a plurality of connecting teeth (51) are arranged below the plane, a pin fixing seat (55) is arranged in the first and last connecting teeth (51), and a receiving groove (54) is formed between two adjacent connecting teeth (51) at the bottom; A plurality of stop blocks (61) are provided on the fixed column cover plate (6); The upper and lower end surfaces of the left end of the left fixed wing (8) are respectively provided with longitudinal first limiting columns (81), the right end is fixed with a left meshing gear (82), and the left fixed wing (8) is provided with a left transverse limiting waist-shaped hole; A right meshing gear (92) is fixed to the left end of the right fixed wing (9), and longitudinal second limiting columns (91) are respectively arranged on the upper and lower end surfaces of the right end, and a right transverse limiting waist-shaped hole is arranged on the right fixed wing (9); A left fixed wing mounting groove (13) is provided at the bottom of the left hinge (1), and longitudinal limiting sliding grooves (131) are respectively provided on two inner walls opposite to the left fixed wing mounting groove (13). A right fixed wing mounting groove of the same structure is provided at a corresponding position of the right hinge (2), and transverse limiting columns (14) are provided on the left fixed wing mounting groove (13) and the right fixed wing mounting groove; the left fixed wing (8) is arranged in the left fixed wing mounting groove (13) and the first limiting column (81) is located in the longitudinal limiting sliding groove (131); the right fixed wing (9) is correspondingly arranged in the right fixed wing mounting groove, and two transverse limiting columns (14) are respectively located in the left transverse limiting waist-shaped hole and the right transverse limiting waist-shaped hole; The connecting column (56) is pressed onto the left hinge (1) and the right hinge (2), and the connecting teeth (51) are inserted into the gap formed by the left hinge guide teeth (12) and the right hinge guide teeth. The fixed column cover plate (6) is fixedly connected to the bottom surface of the connecting column (56) to form a slideway. The pin column is inserted into the slideway and its two ends are fixedly connected to two pin column fixing seats (55). The left hinge (1) and the right hinge (2) are respectively slidably matched with the pin column through the left hinge guide teeth (12) and the right hinge guide teeth. The left meshing gear (82) and the right meshing gear (92) are arranged in the receiving groove (54), and the meshing gear cover plate (7) is fixedly connected to the bottom surface of the receiving groove (54).

2. The screen folding mechanism according to claim 1, characterized in that: The linkage gear (32) is provided with a mounting shaft, the mounting shaft is rotationally connected to one end of the gear connecting rod (33), and the other end of the gear connecting rod (33) is rotationally connected to the fixing column (5).

3. The screen folding mechanism according to claim 2, characterized in that: A left connecting seat (52) for rotationally connecting with the gear connecting rod (33) is provided on the left side of the connecting column (56), and a right connecting seat (53) is correspondingly provided on the right side.

4. The screen folding mechanism according to any one of claims 1 to 3, characterized in that: The elastic clamping structure comprises a receiving portion (112) and a wheel rim mounting shaft (114), a wheel rim (115), a pressing platform (116) and an elastic member (117) arranged in the receiving portion (112); a notch is arranged at the upper portion of the receiving portion (112); the wheel rim (115) is arranged adjacent to the notch through the wheel rim mounting shaft (114); the upper portion of the wheel rim (115) passes through the notch and is located outside the receiving portion (112); the lower portion contacts one end of the pressing platform (116); and a plurality of elastic members (117) are arranged at the other end of the pressing platform (116); a slideway is respectively arranged on the bottom surfaces of the upper and lower ends of the left telescopic plate (3); a fixing socket is arranged on the inner side surface of the slideway at the upper end; the left telescopic plate (3) is connected to the slideway (11) by being clamped into the fixing socket through the upper portion of the wheel rim (115).

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