Light guide plate carrying angle adjusting mechanism

Abstract

The utility model relates to a light guide plate carrying angle adjusting mechanism which is provided with a bottom plate, and a first connecting base and a second connecting base are arranged at the bottom of the bottom plate. A servo transmission mechanism is arranged at the bottom of the first connecting seat, and a driving toothed belt wheel in transmission connection with the servo transmission mechanism is arranged in the first connecting seat; a driven tooth-shaped belt wheel in transmission connection with the driving tooth-shaped belt wheel is arranged in the second connecting seat; a vertically-arranged main shaft is arranged on the top face of the bottom plate, the lower end of the main shaft penetrates through the bottom plate to be connected with a driven tooth-shaped belt wheel through a shaft, and the lower end of the main shaft is movably connected with a rotating connector. The top of the main shaft is provided with a vacuum chuck, and the axis of the main shaft is provided with a vertically-through first air hole communicating with the rotary connector and the vacuum chuck. According to the light guide plate carrying angle adjusting mechanism, the light guide plate can be conveniently adsorbed and fixed through the vacuum suction cups, the vacuum suction cups can rotate horizontally, then the horizontal angle of the light guide plate supported by the top of the vacuum suction cups can be adjusted, practicability and flexibility are achieved, stability is good, cost is saved, and machining efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of light guide plate processing, in particular to a light guide plate handling angle adjusting mechanism. Background Art

[0002] The light guide plate originated from the liquid crystal display screen of a notebook computer. It is usually injection-molded into a plate shape with acrylic or PC material, and then processed by printing light guide points on the bottom surface of a high-tech material plate with extremely high refractive index and non-light-absorbing properties. It has the characteristics of high light transmittance and strong impact resistance, and is widely used.

[0003] After injection molding, the light guide plate parts will generate gate residues and need to be cut. At the same time, the size of the light guide plate will be cut according to needs during the manufacturing process. In addition, in order to ensure that the surface of the processed light guide plate will not be scratched during handling, a protective film needs to be pasted. Therefore, a combination of multiple processes is required to achieve the preparation of the light guide plate.

[0004] Currently, during the processing of the light guide plate, it is mostly automated. The light guide plate is transported by a robotic arm cooperating with a servo carrier mechanism. The servo carrier mechanism carrying the light guide plate can usually only clamp and fix the light guide plate and perform linear transportation. For the adjustment of the horizontal angle of the light guide plate during the processing, it can only be achieved by the robotic arm grasping and rotating. Therefore, in some large light guide plate processing equipment, the cooperation of multiple robotic arms is required, increasing the processing cost. For some small light guide plate processing equipment, due to limited space, it is difficult to install the robotic arm. Therefore, manual intervention is usually required for the adjustment of the horizontal angle of the light guide plate, and the operation process is cumbersome. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a light guide plate handling angle adjusting mechanism that can automatically change the angle of the light guide plate during handling.

[0006] To solve the above technical problem, the utility model is realized by the following technical solutions:

[0007] A light guide plate conveying angle adjustment mechanism comprises a bottom plate, wherein a first connecting seat fixedly connected to the bottom plate is arranged near the center of the front side, and a second connecting seat corresponding to the front and rear sides of the first connecting seat is arranged at the rear side; a servo transmission mechanism fixedly connected to the bottom of the first connecting seat is arranged, and a driving toothed belt wheel connected to the servo transmission mechanism is arranged in the first connecting seat; a driven toothed belt wheel corresponding to the front and rear sides of the driving toothed belt wheel is arranged in the second connecting seat, and the driving toothed belt wheel and the driven toothed belt wheel are connected through a toothed belt transmission; a vertically arranged main shaft is arranged at the center of the top surface of the bottom plate near the back side, and the lower end of the main shaft passes through the bottom plate and is connected to the driven toothed belt wheel shaft. The lower end of the main shaft passes through the driven toothed belt pulley, and a rotating joint movably connected to the lower end of the main shaft is provided in the part of the second connecting seat below the driven toothed belt pulley, and the rotating joint is fixed in the second connecting seat; a shaft cylinder is sleeved on the outside of the part of the main shaft above the bottom plate, and the bottom of the shaft cylinder is fixedly connected to the bottom plate, the upper end of the main shaft passes upward through the shaft cylinder and extends above the top of the shaft cylinder, and a base is sleeved on the outside of the part of the main shaft above the top of the shaft cylinder, and a vacuum suction cup fixedly connected to the top of the base is provided, and the top of the main shaft is fixedly connected to the bottom center of the vacuum suction cup, and the axis of the main shaft is provided with an air hole that passes through from top to bottom and connects the rotating joint and the vacuum suction cup.

[0008] Furthermore, the vacuum suction cup is composed of a suction cup seat and a suction cup surface fixedly connected to the top of the suction cup seat; the bottom of the suction cup seat is fixedly connected to the top of the base, the top of the suction cup seat is provided with an inwardly concave air cavity, and the center of the bottom is provided with a connecting hole connected with the air cavity up and down, the connecting hole corresponds to the top of the air hole 1 of the main shaft up and down and is connected with each other; a number of air holes 2 connected up and down are evenly distributed on the suction cup surface, and the air holes 2 correspond to the air cavity up and down.

[0009] Furthermore, the base has symmetrically arranged reinforcing ribs on the left and right sides, and the reinforcing ribs are fixedly connected to the bottom of the suction cup seat.

[0010] Furthermore, a balancer is provided on the bottom plate at the location outside the shaft cylinder. The balancer corresponds to the shaft cylinder on the left and right, and is composed of a balance frame and a rubber wheel axially connected to one side of the top of the balance frame. The top surface of the rubber wheel can contact the bottom of the vacuum suction cup.

[0011] Furthermore, the balancer has two groups, which are symmetrically arranged on the left and right sides of the shaft cylinder.

[0012] Furthermore, a second slot-shaped photoelectric switch is arranged on the outer side of the balance frame near the top, and a second shielding piece is arranged on the bottom of the vacuum suction cup near the end, and the movement track of the second shielding piece passes through the second slot-shaped photoelectric switch.

[0013] Further, the main shaft is movably connected to the shaft cylinder through a bearing.

[0014] Further, a first groove-shaped photoelectric switch is arranged on the front outer side of the shaft cylinder on the bottom plate, and a first shielding piece fixedly connected thereto is arranged on the front surface of the base, and the movement track of the first shielding piece passes through the first groove-shaped photoelectric switch.

[0015] Further, the first shielding piece is fixedly installed on the bottom plate through a support seat.

[0016] Further, the servo drive mechanism is composed of a servo motor and a reducer; the servo motor is drivingly connected to the reducer, the reducer is fixedly connected to the bottom of the first connecting seat, and the power output end of the reducer vertically penetrates upward through the first connecting seat and is axially connected to the driving toothed belt pulley.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: This light guide plate handling angle adjustment mechanism can very conveniently adsorb and fix the light guide plate through a vacuum chuck and facilitate the separation of the light guide plate therefrom. At the same time, the vacuum chuck can achieve horizontal rotation through the servo drive mechanism and the matching main shaft, thereby realizing the horizontal angle adjustment of the light guide plate carried on its top. It is practical and flexible, has good stability, saves costs and ensures the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a front axonometric structural schematic diagram of a light guide plate handling angle adjustment mechanism of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged view of the structure of A in

[0021] Figure 3 is a rear axonometric structural schematic diagram of a light guide plate handling angle adjustment mechanism of the present utility model;

[0022] Figure 4 is a bottom structural schematic diagram of a light guide plate handling angle adjustment mechanism of the present utility model;

[0023] Figure 5 is a side structural sectional view of a light guide plate handling angle adjustment mechanism of the present utility model;

[0024] Figure 6 It is a cross-sectional view of the side structure of the vacuum chuck in an angle adjustment mechanism for transporting a light guide plate of the present utility model.

[0025] In the figure: 1. bottom plate; 11. first connecting seat; 12. second connecting seat; 2. servo motor; 21. reducer; 22. driving toothed belt pulley; 23. driven toothed belt pulley; 24. toothed belt; 3. shaft cylinder; 31. main shaft; 311. first air hole; 32. bearing; 4. vacuum chuck; 41. base; 42. chuck seat; 421. air cavity; 422. connecting hole; 43. suction plate surface; 431. second air hole; 5. balancer; 51. balance frame; 52. rubber wheel; 6. first groove-type photoelectric switch; 61. first shielding piece; 62. support seat; 7. second groove-type photoelectric switch; 71. second shielding piece; 8. rotary joint. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present utility model are usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0028] In addition, when terms such as "horizontal" and "vertical" appear, it does not mean that the components are required to be absolutely horizontal or vertical, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure or component must be completely horizontal, but it can be slightly inclined.

[0029] In the description of the embodiments of the present invention, "a plurality of" represents at least two.

[0030] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, when terms such as "arranged", "installed", "connected", and "coupled" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment

[0031] Please refer to the accompanying Figure 1 and 3 as shown. The accompanying Figure 1 and 3 as shown is an angle adjustment mechanism for transporting a light guide plate according to the present invention, which has a bottom plate 1. The bottom plate 1 is a flat plate and has a rectangular structure. A first connection seat 11 fixedly connected thereto is provided at the central part near the front of the bottom of the bottom plate 1. The first connection seat 11 is in a hollow shape, and an axially connected hole communicating inside and outside is provided at its bottom. A second connection seat 12 corresponding to the first connection seat 11 in the front-rear direction is provided at the rear of the first connection seat 11. Similarly, the second connection seat 12 is also in a hollow shape, and an air path connection hole communicating inside and outside is also provided at its bottom. A servo drive mechanism fixedly connected thereto is provided at the bottom of the first connection seat 11. Refer to the accompanying Figure 1, as shown in FIGS. 3, 4 and 5, the servo drive mechanism is composed of a servo motor 2 and a speed reducer 21. The speed reducer 21 and the servo motor 2 are arranged vertically. The servo motor 2 is in transmission connection with the speed reducer 21. The transmission shaft of the servo motor 2 is connected to the power input end of the speed reducer 21. The speed reducer 21 is fixedly connected to the bottom of the first connecting seat 11. The power output end of the speed reducer 21 vertically penetrates upward through the shaft connecting hole of the first connecting seat 11 and extends into the first connecting seat 11. A driving toothed belt pulley 22 in transmission connection with the servo drive mechanism is arranged in the first connecting seat 11. Specifically, the power output end of the speed reducer 21 vertically penetrates upward through the shaft connecting hole of the first connecting seat 11 and is axially connected to the driving toothed belt pulley 22. A driven toothed belt pulley 23 corresponding to the driving toothed belt pulley 22 front and back is arranged in the second connecting seat 12. The driving toothed belt pulley 22 and the driven toothed belt pulley 23 are both horizontally arranged and are on the same horizontal plane. The driving toothed belt pulley 22 and the driven toothed belt pulley 23 are in transmission connection through a toothed belt 24. The driving toothed belt pulley 22 can drive the driven toothed belt pulley 23 to rotate synchronously through the toothed belt 24. A main shaft 31 vertically arranged is provided at the center of the top surface of the bottom plate 1 near the back. A main shaft connecting hole facilitating the vertical penetration of the main shaft 31 is provided on the bottom plate 1. The main shaft connecting hole and the second connecting seat 12 are vertically corresponding. The lower end of the main shaft 31 penetrates through the bottom plate 1 through the main shaft connecting hole and is axially connected to the driven toothed belt pulley 23 located in the second connecting seat 12. And the lower end of the main shaft 31 penetrates through the driven toothed belt pulley 23. The driven toothed belt pulley 23 can drive the main shaft 31 to rotate synchronously. A rotary joint 8 movably connected to the lower end of the main shaft 31 is arranged at the position below the driven toothed belt pulley 23 in the second connecting seat 12. An external vacuum generator is connected to the rotary joint 8 through a pipeline passing through the air path connecting hole on the second connecting seat 12. The rotary joint 8 is fixed in the second connecting seat 12. When the main shaft 31 rotates, it will not drive the rotary joint 8 to rotate. An axle cylinder 3 is sleeved outside the part of the main shaft 31 above the bottom plate 1. The bottom of the axle cylinder 3 is fixedly connected to the bottom plate 1 through bolts. The upper end of the main shaft 31 penetrates upward through the top of the axle cylinder 3 and extends above the top of the axle cylinder 3. The axle cylinder 3 mainly plays a role in protecting the main shaft 31. In order to avoid the interference of the axle cylinder 3 with the rotation of the main shaft 31, and at the same time to restrict the horizontal position of the main shaft 31 during rotation and ensure the balance of the main shaft 31, refer to the attached drawings of the specification Figure 5 , as shown in the figure, the main shaft 31 and the axle cylinder 3 are movably connected through bearings 32. There are at least two bearings 32, which are respectively arranged at positions near the upper and lower ends inside the axle cylinder 3. The two bearings 32 are vertically corresponding and are sleeved outside the shaft rod of the main shaft 31. Through the connection of the bearings 32, it can be ensured that the rotation of the main shaft 31 will not interfere with the axle cylinder 3.

[0032] Refer to the attached instructions Figure 1 , as shown in Figures 3 and 5, a base 41 is sleeved outside the part of the main shaft 31 above the top of the shaft cylinder 3. There is a clearance fit between the bottom surface of the base 4 and the top of the shaft cylinder 3. A vacuum chuck 4 fixedly connected thereto is provided on the top of the base 41, and the top of the main shaft 31 is fixedly connected to the center of the bottom of the vacuum chuck 4. When the main shaft 31 rotates, it can drive the base 41 and the vacuum chuck 4 to rotate synchronously. In order to achieve the adsorption effect of the vacuum chuck 4, a through-hole 311 is provided in the axis of the main shaft 31, which is vertically through and communicates with the rotary joint 8 and the vacuum chuck 4. Refer to the attached instructions Figure 6 , as shown in the figure, the vacuum chuck 4 is composed of a chuck base 42 and a chuck surface 43 fixedly connected to the top of the chuck base 42. The chuck surface 43 and the chuck base 42 are fixedly connected together by bolts. A sealing ring is provided between the fitting surfaces of the chuck base 42 and the chuck surface 43 to ensure the sealing between the two; the bottom of the chuck base 42 is fixedly connected to the top of the base 41 by bolts; an inwardly concave air cavity 421 is provided at the top of the chuck base 42. The air cavity 421 has a rectangular structure. The sealing ring is provided at the outer part of the top of the chuck base 42 where the air cavity 421 is located. A connecting hole 422 vertically communicating with the air cavity 421 is provided at the center of the bottom of the chuck base 42. The connecting hole 422 is vertically corresponding and communicating with the top of the through-hole 311 of the main shaft 31. The vacuum generator is connected to the rotary joint 8 through an air path and communicates with the air cavity 421 through the through-hole 311 communicating with the rotary joint 8; a plurality of vertically communicating through-holes 431 are evenly distributed on the chuck surface 43. The through-holes 431 correspond to the air cavity 421 vertically. When negative pressure is generated in the air cavity 421, suction force will be generated in the through-holes 431 on the chuck surface 43, and the object placed on the chuck surface 43 can be adsorbed. In order to ensure the support strength and stability of the vacuum chuck 4, refer to the attached instructions Figure 1 , as shown in Figures 3 and 4, symmetrically arranged reinforcing ribs 411 are provided on the left and right sides of the base 41. The reinforcing ribs 411 have a triangular structure. The reinforcing ribs 411 are fixedly connected between the bottom of the chuck base 42 and the outside of the base 41, and are fixedly connected by bolts, which is convenient for disassembly and assembly.

[0033] In order to ensure the balance of the vacuum chuck 4 and ensure the support strength of the vacuum chuck 4, refer to the attached instructions Figures 1 to 4As shown, a balancer 5 is provided at a position on the bottom plate 1 outside the shaft cylinder 3. The balancer 5 corresponds to the shaft cylinder 3 left and right. When the length direction of the vacuum suction cup 4 is parallel to the length direction of the bottom plate 1 up and down, the top of the balancer 5 can support the bottom of the vacuum suction cup 4; the balancer 5 is composed of a balance frame 51 and a rubber wheel 52 pivotally connected to one side of the top of the balance frame 51. The top surface of the rubber wheel 52 can contact the bottom of the vacuum suction cup 4, and the top surface of the rubber wheel 52 is in rolling connection with the bottom of the vacuum suction cup 4, that is, the bottom of the suction cup seat 42.

[0034] To ensure the balance of the support for the bottom of the vacuum suction cup 4, there are two sets of the balancers 5, which are symmetrically arranged on the left and right sides of the shaft cylinder 3 and are respectively close to the positions near the left and right sides of the top of the bottom plate 1.

[0035] To be able to monitor the position of the vacuum suction cup 4 and ensure that the length direction of the vacuum suction cup 4 is consistent with the length direction of the bottom plate 1 after it returns to its position, refer to the attached Figure 2 As shown, a first groove-shaped photoelectric switch 6 is provided on the front outer side of the shaft cylinder 3 on the bottom plate 1. A first shielding piece 61 fixedly connected thereto is provided on the front of the base 41, and the movement track of the first shielding piece 61 passes through the first groove-shaped photoelectric switch 6; refer to the attached Figure 1 and 5 As shown, the first shielding piece 61 is fixedly installed on the bottom plate 1 through a support seat 62; a second groove-shaped photoelectric switch 7 is provided at a position near the top on the outer side of the balance frame 51, and a second shielding piece 71 is provided at a position near the end of the bottom of the vacuum suction cup 4. The movement track of the second shielding piece 71 passes through the second groove-shaped photoelectric switch 7.

[0036] The specific working principle is as follows: The light guide plate is grasped by a manipulator and placed on the suction surface 43. The external vacuum generator works, and sucks air into the air chamber 421 through the rotary joint 8 and the air hole 311 communicated therewith. When negative pressure is generated in the air chamber 421, the air hole 431 on the suction surface 43 generates suction force to adsorb the light guide plate placed on the suction surface 43. When adjusting the angle, the servo motor 2 drives the driving toothed belt pulley 22 to rotate through the speed reducer 21. The driving toothed belt pulley 22 drives the driven toothed belt pulley 23 to rotate through the toothed belt 24. The driven toothed belt pulley 23 drives the main shaft 31 connected thereto to rotate synchronously. The main shaft 31 drives the vacuum chuck 4 and the base 41 at its top to rotate synchronously. When the first shielding piece 61 enters the first groove-shaped photoelectric switch 6 and the second shielding piece 71 enters the second groove-shaped photoelectric switch 7, the vacuum chuck 4 can stop rotating. At this time, the length direction of the vacuum chuck 4 is in the same direction as the length direction of the bottom plate 1, parallel up and down. And the two sets of balancers 5 support the bottom of the vacuum chuck 4. When the vacuum chuck 4 rotates, the bottom of the base 41 rolls and rubs against the rubber wheel 52 on the balancer 5, which will not interfere with the rotation of the vacuum chuck 4, ensuring the smoothness and accuracy of the rotation of the vacuum chuck 4 and guaranteeing the processing efficiency.

[0037] This light guide plate handling angle adjustment mechanism can very conveniently adsorb and fix the light guide plate through the vacuum chuck 4 and facilitate the separation of the light guide plate from it. At the same time, the vacuum chuck 4 can achieve horizontal rotation through the servo transmission mechanism and the matched main shaft 31, thereby realizing the horizontal angle adjustment of the light guide plate carried on its top. It is practical and flexible, has good stability, saves costs and guarantees the processing efficiency.

[0038] It should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A light guide plate conveying angle adjustment mechanism, characterized in that: The invention relates to a bottom plate (1), wherein a first connection seat (11) fixedly connected to the bottom plate (1) is arranged at a central part of the bottom plate (1) near the front side, and a second connection seat (12) corresponding to the front and rear sides of the first connection seat (11) is arranged at the rear side; a servo transmission mechanism fixedly connected to the bottom plate (11) is arranged, and a driving toothed belt wheel (22) drivingly connected to the servo transmission mechanism is arranged in the first connection seat (11); a driven toothed belt wheel (23) corresponding to the front and rear sides of the driving toothed belt wheel (22) is arranged in the second connection seat (12), and the driving toothed belt wheel (22) and the driven toothed belt wheel (23) are connected to each other by a toothed belt (24); a main shaft (31) arranged vertically is arranged at a central part of the top plate (1) near the back side, and the lower end of the main shaft (31) passes through the bottom plate (1) and is axially connected to the driven toothed belt wheel (23), and the lower end of the main shaft (31) passes through the driven toothed belt wheel (24) and is connected to the driven toothed belt wheel (23). The driven toothed pulley (23) is provided with a rotary joint (8) movably connected to the lower end of the main shaft (31) at a portion located below the driven toothed pulley (23) in the second connecting seat (12), and the rotary joint (8) is fixed in the second connecting seat (12); a portion of the main shaft (31) located above the bottom plate (1) is sleeved with a shaft cylinder (3) on the outside, the bottom of the shaft cylinder (3) is fixedly connected to the bottom plate (1), the upper end of the main shaft (31) passes through the shaft cylinder (3) upward and extends above the top of the shaft cylinder (3), a base (41) is sleeved with the outside of the portion of the main shaft (31) located above the top of the shaft cylinder (3), a vacuum suction cup (4) fixedly connected thereto is provided at the top of the base (41), the top of the main shaft (31) is fixedly connected to the bottom center of the vacuum suction cup (4), and an air hole (311) is provided at the axis of the main shaft (31) that passes through from top to bottom and connects the rotary joint (8) and the vacuum suction cup (4).

2. The light guide plate conveying angle adjustment mechanism according to claim 1, characterized in that: The vacuum suction cup (4) is composed of a suction cup seat (42) and a suction cup surface (43) fixedly connected to the top of the suction cup seat (42); the bottom of the suction cup seat (42) is fixedly connected to the top of the base (41); the top of the suction cup seat (42) is provided with an inwardly concave air cavity (421); the center of the bottom is provided with a connecting hole (422) connected to the air cavity (421) in upper and lower directions; the connecting hole (422) corresponds to the top of the air hole 1 (311) of the main shaft (31) in upper and lower directions and is connected to each other; the suction cup surface (43) is evenly distributed with a plurality of air holes 2 (431) connected in upper and lower directions; the air holes 2 (431) correspond to the air cavity (421) in upper and lower directions.

3. The light guide plate conveying angle adjustment mechanism according to claim 2, characterized in that: The left and right sides of the base (41) are provided with symmetrically arranged reinforcing ribs (411), and the reinforcing ribs (411) are fixedly connected to the bottom of the suction cup seat (42).

4. The light guide plate conveying angle adjustment mechanism according to claim 1, characterized in that: A balancer (5) is provided on the bottom plate (1) at a position outside the shaft cylinder (3). The balancer (5) corresponds to the shaft cylinder (3) on the left and right, and is composed of a balance frame (51) and a rubber wheel (52) axially connected to one side of the top of the balance frame (51). The top surface of the rubber wheel (52) can contact the bottom of the vacuum suction cup (4).

5. The light guide plate conveying angle adjustment mechanism according to claim 4, characterized in that: The balancer (5) has two groups, which are symmetrically arranged on the left and right sides of the shaft cylinder (3).

6. The light guide plate conveying angle adjustment mechanism according to claim 4, characterized in that: A second slot-shaped photoelectric switch (7) is provided at a position near the top of the outer side of the balance frame (51), and a second shielding sheet (71) is provided at a position near the end of the bottom of the vacuum suction cup (4), and the movement track of the second shielding sheet (71) passes through the second slot-shaped photoelectric switch (7).

7. The light guide plate conveying angle adjustment mechanism according to claim 1, characterized in that: The main shaft (31) and the shaft cylinder (3) are movably connected via a bearing (32).

8. The light guide plate conveying angle adjustment mechanism according to claim 1, characterized in that: A first slot-shaped photoelectric switch (6) is arranged on the bottom plate (1) on the outside of the front face of the shaft cylinder (3), and a first shielding sheet (61) fixedly connected thereto is arranged on the front face of the base (41), wherein the movement track of the first shielding sheet (61) passes through the first slot-shaped photoelectric switch (6).

9. The light guide plate conveying angle adjustment mechanism according to claim 8, characterized in that: The first shielding sheet (61) is fixedly mounted on the bottom plate (1) via a support seat (62).

10. The light guide plate conveying angle adjustment mechanism according to claim 1, characterized in that: The servo transmission mechanism is composed of a servo motor (2) and a reducer (21); the servo motor (2) is transmission-connected to the reducer (21); the reducer (21) is fixedly connected to the bottom of the first connecting seat (11); the power output end of the reducer (21) vertically passes through the first connecting seat (11) and is connected to the axis of the active toothed belt wheel (22).

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