Quantitative cutting device for bright enhancement film processing

Abstract

The utility model relates to the technical field of brightness enhancement film quantitative cutting devices, in particular to a quantitative cutting device for brightness enhancement film processing, which comprises a power source, a bottom plate, a cutting knife and an upper cover, and further comprises a plurality of strip-shaped nozzles, a plurality of mounting grooves and two sliding holes A are arranged on the upper side of the bottom plate, and the strip-shaped nozzles are mounted on the inner sides of the mounting grooves. An electrostatic adsorption block A and an electrostatic adsorption block B slide on the inner side of the sliding hole A; a driving plate is connected to the right side of the lifting plate, supporting plates A are arranged on the front side and the rear side of the lifting plate, supporting plates B are arranged on the front side and the rear side of the driving plate, and the supporting plates A and the supporting plates B are connected; a connecting part; a processing unit; and a linkage unit. By arranging the cutting knife, the lifting plate, the electrostatic adsorption block A, the processing unit and the linkage unit and overlapping movement and cutting actions, space-time coupling of movement and cutting is achieved, the intermittent time during processing is shortened, and cooperative improvement of precision, efficiency and yield is achieved in bright enhancement film processing.

Description

A quantitative cutting device for processing brightening film Technical Field

[0001] This utility model relates to the technical field of quantitative cutting device for brightness enhancement film, and in particular to a quantitative cutting device for brightness enhancement film processing. Background Technology

[0002] Brightness enhancement film is an optical film used to improve the brightness and visibility of liquid crystal displays (LCDs), and is widely used in devices such as televisions, computer monitors, and mobile phone screens.

[0003] Brightness enhancement film is cut to the specified length according to requirements. The typical processing method is to first move the brightness enhancement film to the appropriate position, then cut it, remove the cut film, and move the next piece of brightness enhancement film to the appropriate position to continue processing.

[0004] The cutting process of brightness enhancement film requires a reciprocating motion of "move → stop → cut → pick up → move again," which introduces intermittent time and affects processing efficiency. To address this issue, we propose a quantitative cutting device for brightness enhancement film processing. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that in the existing technology, when the brightness enhancement film is cut, it needs to go through a reciprocating movement of "move → stop → cut → pick up → move again", which will cause intermittent time during the processing and affect the processing efficiency. Therefore, a quantitative cutting device for brightness enhancement film processing is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quantitative cutting device for processing brightness enhancement film is designed, comprising a power source, a base plate, a cutting blade, and a top cover. The cutting blade is located on the upper side of the base plate, and a bottom groove is provided on the upper side of the base plate. The cutting blade edge can slide inside the bottom groove. The top cover is located above the cutting blade. The device also includes:

[0008] The base plate has several strip nozzles, several mounting grooves and two sliding holes A on the upper side. The strip nozzles are installed inside the mounting grooves. An electrostatic adsorption block A and an electrostatic adsorption block B slide inside the sliding holes A. The electrostatic adsorption block B is located to the left of the electrostatic adsorption block A. The electrostatic adsorption blocks A and B are connected to a power supply and a controller through wires.

[0009] The lifting plate is connected to the upper side of the cutting blade and to the power source output end. A drive plate is connected to the right side of the lifting plate. A support plate is provided on both the front and rear sides of the lifting plate. B support plate is provided on both the front and rear sides of the drive plate. The A support plate and the B support plate are connected to each other. The A support plate and the B support plate are connected to the bottom plate and the top cover.

[0010] A connecting part is located between two B electrostatic adsorption blocks and two A electrostatic adsorption blocks, and the connecting part allows the B electrostatic adsorption blocks to move together with the A electrostatic adsorption blocks;

[0011] The processing unit is located on the lifting plate and two A support plates. Under the action of the power source, the lifting plate moves up and down with the processing unit and the cutting blade to realize the cutting processing of the brightness enhancement film.

[0012] The linkage unit is located between the driving plate and the two A electrostatic adsorption blocks, allowing the A electrostatic adsorption blocks to be displaced within the A sliding hole as the lifting plate moves up and down.

[0013] Preferably, the processing unit includes a mounting plate, the cutting blade is mounted on the right side of the mounting plate, the mounting plate is connected to the lower side of the lifting plate, and A-limiting blocks are connected to both the front and rear sides of the mounting plate, with the A-limiting blocks connected to the lower side of the lifting plate. The cutting blade is located between two A-limiting blocks, and the two A-limiting blocks are located between two A-support plates. A B sliding hole is provided on one side of the A-support plate, and an A guide strip slides inside the B sliding hole. The A guide strip is connected to the A-limiting block. An A-limiting plate is provided on the side of the A-support plate away from the lifting plate, and the A-limiting plate is connected to the A guide strip.

[0014] By adopting the above structure, the processing unit allows the cutting blade and the lifting plate to move up and down together, thereby automatically cutting the brightness enhancement film.

[0015] Preferably, a flexible pressure strip is connected to the lower side of the mounting plate.

[0016] By adopting the above structure, the flexible pressure strip can assist in positioning the brightness enhancement film, thereby improving the stability of cutting.

[0017] Preferably, the connecting part includes an A-driven rod and a B-driven rod. The A-driven rod is located to the right of the B-driven rod. Two A-driven blocks are installed on the upper side of the A-driven rod, and two B-driven blocks are installed on the upper side of the B-driven rod. Two guide grooves are provided inside the A-sliding hole. The A-driven blocks and B-driven blocks can slide inside the A-sliding hole. Guide blocks are connected to the front and rear sides of the A-driven blocks and B-driven blocks. The guide blocks can slide inside the guide grooves. An A-electrostatic adsorption block is installed on the upper side of the A-driven block, and a B-electrostatic adsorption block is installed on the upper side of the B-driven block. Two through holes are provided on one side of the B-driven rod. A connecting rod slides inside the through holes. The connecting rod is connected to the left side of the A-driven rod. Two positioning nuts are provided on both the left and right sides of the B-driven rod. The positioning nuts are connected to the connecting rod through threaded engagement.

[0018] By adopting the above structure, the connecting part allows electrostatic adsorption block B to move together with electrostatic adsorption block A.

[0019] Preferably, the linkage unit includes two linkage rods, which are rotatably connected to the A driving rod. Each linkage rod has a threaded hole on its upper side, and a connecting shaft is threadedly connected to the inner side of the threaded hole. An auxiliary block is connected to the upper side of the connecting shaft, and a connecting block is rotatably connected to the upper side of the auxiliary block. A linkage block is connected to the upper side of the connecting block. Two linkage plates are connected to the lower side of the driving plate. A C sliding hole is provided on one side of the B support plate. A linkage shaft and a B guide bar are connected to the side of the linkage plate away from the driving plate. The linkage shaft is rotatably connected to the auxiliary block. The B guide bar is located on the upper side of the linkage shaft and can slide inside the C sliding hole. A B limiting plate is provided on the side of the B support plate away from the driving plate. The B limiting plate is connected to the B guide bar. An auxiliary ring is provided on the lower side of the B limiting plate. The auxiliary ring can rotatably rotate outside the linkage shaft and is connected to the auxiliary block.

[0020] By adopting the above structure, the linkage unit allows the electrostatic adsorption block A to slide within the sliding hole A as the lifting plate moves up and down. Through linkage, the power source is reduced, and the processing efficiency, accuracy and yield of the device are improved.

[0021] The present invention provides a quantitative cutting device for processing brightness enhancement films, which has the following advantages:

[0022] 1. By setting up a cutting blade, lifting plate, electrostatic adsorption block A, processing unit, and linkage unit, the movement and cutting actions overlap, achieving spatiotemporal coupling between movement and cutting. This reduces the intermittent time during processing. Furthermore, during dynamic cutting, the blade and film material move in the same direction, resulting in smoother cutting and reducing scratches on the prism surface caused by relative friction. At the same time, continuous movement avoids the accumulation of static electricity caused by frequent start-stop cycles, reducing the risk of dust adsorption. This achieves a synergistic improvement in precision, efficiency, and yield in the processing of brightness enhancement films.

[0023] 2. By setting up strip nozzles, electrostatic adsorption block A, electrostatic adsorption block B, and connecting parts, the synchronous operation of movement and material picking is achieved, which improves processing efficiency. Attached Figure Description

[0024] Figure 1 is a front three-dimensional structural diagram of a quantitative cutting device for processing a brightness enhancement film proposed in this utility model;

[0025] Figure 2 is a partial enlarged three-dimensional structural diagram of area A in Figure 1 proposed by this utility model;

[0026] Figure 3 is a partial enlarged three-dimensional structural diagram of area B in Figure 1 proposed by this utility model;

[0027] Figure 4 is a partial enlarged three-dimensional structural diagram of region C in Figure 1 proposed by this utility model;

[0028] Figure 5 is a schematic diagram of the lower three-dimensional structure of a quantitative cutting device for processing a brightening film proposed in this utility model;

[0029] Figure 6 is a partial enlarged three-dimensional structural diagram of area D in Figure 5 proposed by this utility model;

[0030] Figure 7 is a partial enlarged three-dimensional structural diagram of region E in Figure 5 proposed by this utility model;

[0031] Figure 8 is a three-dimensional structural diagram of the right side of a quantitative cutting device for processing a brightening film proposed in this utility model.

[0032] Figure 9 is a partial enlarged three-dimensional structural diagram of region F in Figure 8 proposed by this utility model;

[0033] Figure 10 is a partial enlarged three-dimensional structural diagram of region G in Figure 8 proposed by this utility model;

[0034] Figure 11 is a partial enlarged three-dimensional structural diagram of region H in Figure 8 proposed by this utility model.

[0035] In the diagram: 1. Base plate; 2. Cutting blade; 3. Top cover; 4. Strip nozzle; 5. Lifting plate; 6. Connecting part; 61. A driving rod; 62. B driving rod; 63. A driving block; 64. B driving block; 65. Guide block; 66. Connecting rod; 67. Positioning nut; 7. Processing unit; 71. Mounting plate; 72. A limiting block; 73. A guide strip; 74. A limiting plate; 75. Flexible pressure strip; 8. Linkage unit; 81. Linkage rod; 82. Connecting shaft; 83. Auxiliary block; 84. Connecting block; 85. Linkage block; 86. Linkage plate; 87. Linkage shaft; 88. B guide strip; 89. B limiting plate; 810. Auxiliary ring; 9. A electrostatic adsorption block; 10. B electrostatic adsorption block; 11. Driving plate; 12. A support plate; 13. B support plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Referring to Figures 1-11, a quantitative cutting device for processing a brightness enhancement film includes a power source, a base plate 1, a cutting blade 2, and a top cover 3. The cutting blade 2 is located on the upper side of the base plate 1, and a bottom groove is provided on the upper side of the base plate 1. The cutting edge of the cutting blade 2 can slide inside the bottom groove. The top cover 3 is located on the upper side of the cutting blade 2. The device also includes: a plurality of strip nozzles 4, a lifting plate 5, a connecting part 6, a processing unit 7, and a linkage unit 8.

[0038] The upper side of the base plate 1 is provided with several mounting slots and two sliding holes A. The strip nozzle 4 is installed inside the mounting slot and under the brightness enhancement film. By adjusting the angle of the gas ejected by the strip nozzle 4 so that the airflow direction is consistent with the moving direction of the film, the relative speed difference between the airflow and the surface of the film can be reduced, and the probability of eddy currents generated by the collision of reverse airflow can be reduced. The multiple strip nozzles 4 achieve air flotation and suspension, reduce friction, and allow the brightness enhancement film to move better. Ion wind (integrated static eliminator) is mixed into the airflow to reduce the probability of static dust adsorption.

[0039] An electrostatic adsorption block 9 (A) and an electrostatic adsorption block 10 (B) slide inside the sliding hole. The lifting plate 5 is connected to the upper side of the cutting blade 2 and to the power source output end. Support plates 12 (A) are provided on both the front and rear sides of the lifting plate 5. The support plates 12 (A) are connected to the base plate 1 and the upper cover 3.

[0040] The processing unit 7 is located between the lifting plate 5 and the two A support plates 12. Under the action of the power source, the lifting plate 5 moves up and down with the processing unit 7 and the cutting blade 2 to achieve the cutting processing of the brightness enhancement film.

[0041] Processing unit 7 includes a mounting plate 71. A cutting blade 2 is mounted on the right side of the mounting plate 71. The mounting plate 71 is connected to the lower side of the lifting plate 5. A flexible pressure strip 75 is connected to the lower side of the mounting plate 71. The flexible pressure strip 75 assists in positioning the brightening film, improving cutting stability. A limiting blocks 72 are connected to both the front and rear sides of the mounting plate 71, and the A limiting blocks 72 are connected to the lower side of the lifting plate 5. The cutting blade 2 is located between two A limiting blocks 72, which are located between two A support plates 12. A sliding hole B is provided on one side of the A support plate 12. An A guide strip 73 slides inside the B sliding hole, and the A guide strip 73 is connected to the A limiting blocks 72. A limiting plate 74 is provided on the side of the support plate 12 away from the lifting plate 5. The limiting plate 74 is connected to the guide strip 73. The power source can be selected according to the needs, so that the power source moves the lifting plate 5 up and down. The lifting plate 5 will move the cutting blade 2 up and down through the mounting plate 71, so that the cutting blade 2 can automatically cut the brightening film, which improves the processing efficiency. The guide strip 73 and the limiting plate 74 play a guiding and limiting role for the limiting block 72. The limiting block 72 plays a guiding role for the lifting plate 5, making the movement of the lifting plate 5 more stable. At the same time, the limiting plate 74 can limit the cutting blade 2, which improves the stability of the processing.

[0042] The lifting plate 5 is connected to the right side of the driving plate 11. The driving plate 11 is provided with B support plates 13 on both the front and rear sides. The A support plate 12 and the B support plate 13 are connected. The B support plate 13 is connected to the bottom plate 1 and the top cover 3.

[0043] The linkage unit 8 is located between the driving plate 11 and the two A electrostatic adsorption blocks 9, allowing the A electrostatic adsorption blocks 9 to move within the A sliding hole as the lifting plate 5 moves up and down.

[0044] Linkage unit 8 includes two linkage rods 81, which are rotatably connected to drive rod 61 (A). Linkage rod 81 has a threaded hole on its upper side, and a connecting shaft 82 is threadedly connected to the inner side of the threaded hole. An auxiliary block 83 is connected to the upper side of the connecting shaft 82, and a connecting block 84 is rotatably connected to the upper side of the auxiliary block 83. A linkage block 85 is connected to the upper side of the connecting block 84. Two linkage plates 86 are connected to the lower side of drive plate 11. A sliding hole (C) is provided on one side of support plate 13 (B). A linkage shaft 87 and a guide bar 88 (B) are connected to the side of linkage plate 86 away from drive plate 11. The linkage shaft 87 is rotatably connected to the auxiliary block 83. The guide bar 88 is located above the linkage shaft 87. 88 can slide inside the sliding hole C. A B limiting plate 89 is provided on the side of the B support plate 13 away from the driving plate 11. The B limiting plate 89 is connected to the B guide bar 88. An auxiliary ring 810 is provided on the lower side of the B limiting plate 89. The auxiliary ring 810 is rotatable outside the linkage shaft 87 and is connected to the auxiliary block 83. The auxiliary ring 810 limits the auxiliary block 83, making the auxiliary block 83 more stable as the linkage plate 86 moves. It also limits the linkage plate 86, making its movement more stable. When the lifting plate 5 moves up and down, it will move the driving plate 11 up and down together. The B guide bar 88... Limit plates 8 and 89 (B and C) guide the linkage plate 86, which in turn guides the movement of the drive plate 11, making its movement more stable. The drive plate 11 moves the linkage shaft 87 within the sliding hole C via the linkage plate 86. The linkage shaft 87, through the linkage block 85, connecting block 84, connecting shaft 82, and linkage rod 81, moves the drive rod 61 (A) mentioned below. The drive rod 61, through the drive block 63, moves the electrostatic adsorption block 9 (A) within the sliding hole A. As the cutting blade 2 presses down for processing, the electrostatic adsorption block 9 moves with the brightening film, achieving synchronous movement and processing. Overlapping with the cutting action, it saves the intermittent time of the traditional "move → stop → cut → pick up → move again" process, achieving spatiotemporal coupling between movement and cutting. During dynamic cutting, the blade and the film material move in the same direction, making the cut smoother and reducing scratches on the prism surface caused by relative friction. At the same time, continuous movement avoids the accumulation of static electricity caused by frequent start and stop, reducing the risk of dust adsorption. In the processing of brightness enhancement film, it achieves a synergistic improvement in precision, efficiency, and yield. Adjusting the height of the lifting plate 5 and the extension length of the connecting shaft 82 on the linkage rod 81, thereby adjusting the moving distance and the corresponding cutting height, allows the device to process brightness enhancement films with different length requirements, improving the applicability of the device.

[0045] Electrostatic adsorption block 10 (B) is located to the left of electrostatic adsorption block 9 (A). Electrostatic adsorption block 9 (A) and electrostatic adsorption block 10 (B) are connected to the power supply and controller via wires.

[0046] The connecting part 6 is located between the two B electrostatic adsorption blocks 10 and the two A electrostatic adsorption blocks 9. The connecting part 6 allows the B electrostatic adsorption blocks 10 to move together with the A electrostatic adsorption blocks 9.

[0047] The connecting part 6 includes an A-driven rod 61 and a B-driven rod 62. The A-driven rod 61 is located to the right of the B-driven rod 62. Two A-driven blocks 63 are installed on the upper side of the A-driven rod 61, and two B-driven blocks 64 are installed on the upper side of the B-driven rod 62. Two guide grooves are provided inside the A-sliding hole, and the A-driven blocks 63 and B-driven blocks 64 can slide inside the A-sliding hole. Guide blocks 65 are connected to the front and rear sides of the A-driven blocks 63 and B-driven blocks 64, and the guide blocks 65 can slide inside the guide grooves. An A-electrostatic adsorption block 9 is installed on the upper side of the A-driven block 63, and a B-electrostatic adsorption block 10 is installed on the upper side of the B-driven block 64. Two through holes are provided on one side of the B-driven rod 62, and a connecting rod 66 slides inside the through holes. The connecting rod 66 is connected to the left side of the A-driven rod 61. Two positioning nuts 67 are provided on both the left and right sides of the B-driven rod 62. The positioning nuts 67 are connected to the connecting rods 66 through threaded engagement. Adjustment of the B-driven rod... At position 62, the distance between drive rod 61 (A) and drive rod 62 (B) is aligned with the distance the brightness enhancement film moves. Then, drive rod 62 (B) is positioned using locating nut 67. During processing, electrostatic adsorption block 9 (A) moves the brightness enhancement film to the appropriate position. After cutting, electrostatic adsorption block 9 (A) moves to the lower front end of the subsequent brightness enhancement film, while electrostatic adsorption block 10 (B) moves to the lower side of the cut brightness enhancement film. During continued processing, electrostatic adsorption block 9 (A) moves with the subsequent brightness enhancement film, while electrostatic adsorption block 10 (B) moves with the cut brightness enhancement film, avoiding interference and improving processing efficiency. The strip nozzle 4, electrostatic adsorption block 9 (A), and electrostatic adsorption block 10 (B) are automatically started and stopped by sensors, improving the processing efficiency of the device. Furthermore, the non-contact movement of electrostatic adsorption blocks 9 and 10 (B) improves the quality of the processed products.

[0048] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quantitative cutting device for processing a brightness enhancement film, comprising a power source, a base plate (1), a cutting blade (2), and a top cover (3), wherein the cutting blade (2) is located on the upper side of the base plate (1), the upper side of the base plate (1) is provided with a bottom groove, the cutting edge of the cutting blade (2) is slidable inside the bottom groove, and the top cover (3) is located on the upper side of the cutting blade (2), characterized in that, Also includes: A number of strip nozzles (4) are provided on the upper side of the base plate (1), which has a number of mounting grooves and two A sliding holes. The strip nozzles (4) are installed inside the mounting grooves. An A electrostatic adsorption block (9) and a B electrostatic adsorption block (10) slide inside the A sliding holes. The B electrostatic adsorption block (10) is located to the left of the A electrostatic adsorption block (9). The A electrostatic adsorption block (9) and the B electrostatic adsorption block (10) are connected to the power supply and the controller through wires. A lifting plate (5) is connected to the upper side of the cutting blade (2) and to the power source output end. A driving plate (11) is connected to the right side of the lifting plate (5). A support plate (12) is provided on both the front and rear sides of the lifting plate (5). B support plate (13) is provided on both the front and rear sides of the driving plate (11). The A support plate (12) and the B support plate (13) are connected to each other. The A support plate (12) and B support plate (13) are connected to the base plate (1) and the top cover (3); the connecting part (6) is located between the two B electrostatic adsorption blocks (10) and the two A electrostatic adsorption blocks (9), and the connecting part (6) allows the B electrostatic adsorption blocks (10) to move together with the A electrostatic adsorption blocks (9); the processing unit (7) is located between the lifting plate (5) and the two A support plates (12), and under the action of the power source, the lifting plate (5) moves up and down with the processing unit (7) and the cutting knife (2) to realize the cutting processing of the brightness enhancement film; the linkage unit (8) is located between the driving plate (11) and the two A electrostatic adsorption blocks (9), and allows the A electrostatic adsorption blocks (9) to move in the A sliding hole as the lifting plate (5) moves up and down.

2. The quantitative cutting device for processing a brightness enhancement film according to claim 1, characterized in that, The processing unit (7) includes a mounting plate (71). The cutting blade (2) is mounted on the right side of the mounting plate (71). The mounting plate (71) is connected to the lower side of the lifting plate (5). The mounting plate (71) has A-limiting blocks (72) connected to both the front and rear sides, and the A-limiting blocks (72) are connected to the lower side of the lifting plate (5). The cutting blade (2) is located between the two A-limiting blocks (72). The two A-limiting blocks (72) are located between the two A-support plates (12). The A-support plate (12) has a B-sliding hole on one side. An A-guide strip (73) slides inside the B-sliding hole. The A-guide strip (73) is connected to the A-limiting block (72). The A-support plate (12) has an A-limiting plate (74) on the side away from the lifting plate (5). The A-limiting plate (74) is connected to the A-guide strip (73).

3. The quantitative cutting device for processing a brightness enhancement film according to claim 2, characterized in that, A flexible pressure strip (75) is connected to the lower side of the mounting plate (71).

4. The quantitative cutting device for processing a brightness enhancement film according to claim 1, characterized in that, The connecting part (6) includes an A-driven rod (61) and a B-driven rod (62). The A-driven rod (61) is located to the right of the B-driven rod (62). Two A-driven blocks (63) are installed on the upper side of the A-driven rod (61), and two B-driven blocks (64) are installed on the upper side of the B-driven rod (62). Two guide grooves are provided inside the A sliding hole. The A-driven blocks (63) and B-driven blocks (64) can slide inside the A sliding hole. Guide blocks (65) are connected to both the front and rear sides of the A-driven blocks (63) and B-driven blocks (64). The guide block (65) can slide inside the guide groove. The electrostatic adsorption block A (9) is installed on the upper side of the drive block A (63). The electrostatic adsorption block B (10) is installed on the upper side of the drive block B (64). The drive rod B (62) has two through holes on one side. A connecting rod (66) slides inside the through holes. The connecting rod (66) is connected to the left side of the drive rod A (61). The drive rod B (62) has two positioning nuts (67) on both the left and right sides. The positioning nuts (67) and the connecting rod (66) are connected by threaded engagement.

5. The quantitative cutting device for processing a brightness enhancement film according to claim 4, characterized in that, The linkage unit (8) includes two linkage rods (81), which are rotatably connected to the A driving rod (61). The upper side of the linkage rod (81) is provided with a threaded hole, and the inner side of the threaded hole is connected to a connecting shaft (82) by thread engagement. An auxiliary block (83) is connected to the upper side of the connecting shaft (82), and a connecting block (84) is rotatably connected to the upper side of the auxiliary block (83). A linkage block (85) is connected to the upper side of the connecting block (84). Two linkage plates (86) are connected to the lower side of the driving plate (11). A C sliding hole is provided on one side of the B support plate (13), and the linkage plates (86) are away from the driving plate (11). A linkage shaft (87) and a guide bar (88) are connected on one side. The linkage shaft (87) is rotatably connected to the auxiliary block (83). The guide bar (88) is located on the upper side of the linkage shaft (87) and can slide inside the sliding hole (C). A limit plate (89) is provided on the side of the B support plate (13) away from the drive plate (11). The limit plate (89) is connected to the guide bar (88). An auxiliary ring (810) is provided on the lower side of the limit plate (89). The auxiliary ring (810) can rotate outside the linkage shaft (87) and is connected to the auxiliary block (83).

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