Lens ink-jet shielding device and method

Abstract

According to the technical scheme, the lens ink-jet shielding device is characterized by comprising a cavity and a shielding jig, the cavity comprises an upper cavity and a lower cavity which can be separated, a closed space is formed when the upper cavity and the lower cavity are closed, the cavity is connected with an air suction pipe used for vacuumizing and further connected with an air inlet pipe used for breaking vacuum, and the shielding jig is arranged in the cavity. A first clamping jaw used for grabbing the lens and a second clamping jaw used for grabbing the shielding jig are arranged in the cavity, the shielding jig is provided with a concave surface, and when the shielding jig is attached to the lens, the concave surface covers an optical area of the lens and forms a vacuum cavity; according to the shielding jig, fixing is achieved through the vacuum cavity formed by the concave face, the complex curved face of the side face of the lens can be directly covered, attaching is more accurate, the situation of ink overflow caused by thermal deformation is avoided, and the yield of the lens is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of lens processing, and more specifically to a lens inkjet shielding device and method. Background Art

[0002] With the popularization of VR / AR technology, 3D glasses, as key components of these technologies, have increasingly higher technical requirements in the production process, especially in the processing of lenses. In order to achieve specific visual effects and functionality, it is often necessary to perform inkjet processing on the non-optical area on the side of the lens, and ensure that the optical area is not contaminated with ink.

[0003] In the current inkjet process, the masking treatment of the side optical area mainly adopts the film masking method, which is to stick a protective film on the optical area to prevent the ink from contaminating the optical area during the inkjet process. However, this method has many problems in practical application:

[0004] 1. Since the lens surface is often a curved design with high surface complexity, it is difficult to ensure edge accuracy after the film is bonded to the surface. A slight deviation in the film position may cause the edge of the optical zone to be contaminated with ink, affecting the optical performance of the lens; 2. After inkjet is completed, the ink needs to be heated to promote its solidification. During this process, the film material will also be affected by heat and deformed, which may cause ink overflow or film shedding, further reducing the product yield; 3. The film masking method requires manual operation, which not only increases production costs, but also reduces production efficiency. At the same time, since the film accuracy is difficult to control, multiple reworks are often required, further increasing the production cycle. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A lens inkjet shielding device comprises a cavity and a shielding jig, wherein the cavity comprises a separable upper cavity and a lower cavity, wherein the upper cavity and the lower cavity form a closed space, wherein the cavity is connected with an exhaust pipe for evacuating a vacuum and an air inlet pipe for breaking the vacuum, wherein a first clamping jaw for grasping the lens and a second clamping jaw for grasping the shielding jig are arranged in the cavity, wherein a concave surface is arranged on the shielding jig, and when the shielding jig is attached to the lens, the concave surface covers the optical zone of the lens and forms a vacuum cavity.

[0007] The present invention is further configured as follows: a circle of flexible sealing ring is provided on the edge of the concave surface, and the sealing ring is in contact with the edge of the optical zone of the lens.

[0008] The present invention is further configured as follows: the first clamping jaw is arranged in the lower cavity, the second clamping jaw is arranged in the upper cavity, the air inlet pipe is connected to the side wall of the lower cavity, and the air exhaust pipe is connected to the side wall of the upper cavity.

[0009] The present invention is further configured such that: the first clamping jaw and the second clamping jaw both adopt vacuum suction nozzles.

[0010] The present invention is further configured such that: the adsorption vacuum degree of the first clamping jaw and the second clamping jaw is greater than the vacuum degree after the cavity is evacuated.

[0011] The present invention is further configured as follows: it also includes a driving platform, a first guide rail is provided on the driving platform, a mounting plate is slidably connected to the first guide rail, the lower cavity is provided on the mounting plate, a lifting cylinder for driving the lower cavity to move up and down is provided on the mounting plate, a second guide rail parallel to the first guide rail is also provided on the driving platform, and the upper cavity is slidably connected to the second guide rail.

[0012] The present invention is further configured as follows: a CCD visual detection device for correcting the position of the lens and the shielding fixture is arranged on the driving platform, and the CCD visual detection device includes an upper CCD camera and a lower CCD camera, the upper CCD camera is used to photograph the lens, and the lower CCD camera is used to photograph the shielding fixture.

[0013] The present invention also provides a lens inkjet shielding method, which is applied to the lens inkjet shielding device as described above, and further includes the following steps:

[0014] S1: the upper cavity and the lower cavity are separated to open the cavity, the first clamping jaw clamps the lens, and the second clamping jaw clamps the shielding fixture;

[0015] S2: the upper cavity and the lower cavity are closed to form a closed space, and the cavity is evacuated through the vacuum port;

[0016] S3: The second clamping jaw fits the shielding fixture to the optical area on the side of the lens;

[0017] S4: Intake air through the air inlet to break the vacuum of the cavity, and the shielding fixture is fixed on the lens under the action of air pressure difference;

[0018] S5: the upper chamber is separated from the lower chamber to open the chamber, and the lens is taken out to perform an inkjet process;

[0019] S6: After the inkjet is completed, the lens is returned to the first clamp, the upper cavity and the lower cavity are closed to form a closed space, and the cavity is vacuumed again through the vacuum port;

[0020] S7: Separating the shielding fixture from the lens in the vacuumed cavity;

[0021] S8: Intake air through the air inlet to break the vacuum of the cavity again;

[0022] S9: The upper cavity is separated from the lower cavity to open the cavity, and the lens is taken out and unloaded.

[0023] The present invention is further configured to include a cleaning step, in which after the cavity is opened in step S9, the cleaning step is performed: the shielding jig is taken out for cleaning, and after cleaning, the shielding jig is dried, and after drying, the shielding jig is returned to the second clamp.

[0024] The present invention is further configured to include: a calibration step using the CCD visual inspection device, wherein in step S1, when the first clamping jaw clamps the lens, the upper CCD camera photographs the lens, and in the cleaning step, when the shielding jig is returned to the second clamping jaw, the lower CCD camera photographs the shielding jig.

[0025] Compared with the prior art, the present invention has at least the following advantages:

[0026] 1. Use a masking jig to mask the optical area of ​​the lens. The masking jig is fixed through the vacuum cavity formed by the concave surface, making the connection more stable. The masking jig is not easy to shift or fall off when the lens rotates during inkjet printing. The concave surface can directly cover the complex curved surface on the side of the lens, making the edge of the concave surface fit more accurately with the edge of the optical area, and avoiding ink overflow due to heat deformation, thereby improving the yield rate of the lens.

[0027] 2. The masking jig is attached to the lens through the cavity. In the vacuumed cavity, the masking jig is attached to the lens. After the vacuum is broken in the cavity, the masking jig is firmly fixed on the lens under the action of pressure difference. After inkjet is completed, it returns to the vacuumed cavity. In the vacuum environment, the pressure difference disappears and the masking jig can be easily separated from the lens.

[0028] 3. By setting up a CCD visual inspection device, when the lens and the shielding fixture are sucked onto the clamp, they are automatically corrected so that the shielding fixture is aligned with the optical area on the side of the lens. No manual adjustment is required, and the accuracy is high. While reducing labor costs, it also further improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a first perspective view of the first embodiment;

[0030] Figure 2 is a second viewing angle diagram of the first embodiment;

[0031] Figure 3 is a schematic diagram of the masking jig;

[0032] Figure 4 It is a schematic diagram of the masking jig and the lens being fitted together;

[0033] Figure 5It is a first-person view of the driving platform;

[0034] Figure 6 This is a bottom view of the drive platform.

[0035] Description of reference numerals:

[0036] 1. Upper cavity; 2. Lower cavity; 3. First clamping jaw; 4. Second clamping jaw; 5. Shielding fixture; 6. Concave surface; 7. Sealing ring; 8. Air extraction port; 9. Air inlet; 10. Lens; 11. Optical area; 12. Rubber-coated fixture; 13. Rubber ring; 14. Upper CCD camera; 15. Lower CCD camera; 16. First guide rail; 17. Second guide rail; 18. Mounting plate; 19. Lifting cylinder; 20. Laminating cylinder; 21. UVW calibration platform. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] First embodiment:

[0040] A lens inkjet shielding device, such as Figures 1 to 3 As shown, it includes a cavity and a shielding jig 5, the cavity includes a separable upper cavity 1 and a lower cavity 2, the upper cavity 1 and the lower cavity 2 form a closed space, the cavity is connected with an exhaust pipe for vacuuming, and is also connected with an air inlet pipe for breaking the vacuum, a first clamping jaw 3 for grabbing the lens 10 and a second clamping jaw 4 for grabbing the shielding jig 5 are provided in the cavity, and a concave surface 6 is provided on the shielding jig 5. When the shielding jig 5 is attached to the lens 10, the concave surface 6 covers the optical zone 11 of the lens 10 and forms a vacuum cavity.

[0041] A flexible sealing ring 7 is provided at the edge of the concave surface 6. When the shielding jig 5 is attached to the lens 10, the sealing ring 7 is attached to the edge of the optical zone 11 of the lens 10. The sealing ring 7 has a certain thickness, so the sealing ring 7 and the concave surface 6 together form a vacuum cavity. The sealing ring 7 is made of rubber material. When the sealing ring 7 is squeezed, it has a good sealing effect to prevent leakage at the attachment point with the lens 10.

[0042] In this embodiment, the first clamping jaw 3 is arranged in the lower cavity 2, the second clamping jaw 4 is arranged in the upper cavity 1, the lens 10 is loaded into the lower cavity 2, the air inlet pipe is connected to the side wall of the lower cavity 2, and the air exhaust pipe is connected to the side wall of the upper cavity 1. When the upper cavity 1 and the lower cavity 2 are closed to form a closed space, the air exhaust pipe extracts the air in the cavity to form a vacuum environment in the cavity, and the air inlet pipe introduces air into the cavity to break the vacuum environment. The side wall of the lower cavity 2 is provided with an air inlet port 9, and the side wall of the upper cavity 1 is provided with an air exhaust port 8. The air inlet pipe and the air exhaust pipe are respectively connected at the air inlet port 9 and the air exhaust port 8. The air exhaust pipe and the air inlet pipe have their own valve structure and will not affect the sealing of the cavity.

[0043] A ring groove is provided along the edge of the top of the lower cavity 2, in which a rubber ring 13 is embedded. The top of the rubber ring 13 protrudes out of the ring groove. When the upper cavity 1 and the lower cavity 2 are closed, the rubber ring 13 is squeezed to improve the sealing performance of the cavity.

[0044] After the cavity is evacuated, the shielding jig 5 is attached to the optical zone 11 of the lens 10, and then the cavity is broken. The vacuum cavity of the shielding jig 5 forms an air pressure difference with the outside world, so that it is fixed on the lens 10. In this embodiment, the shielding jig 5 is rectangular, 16 mm long, 8 mm wide, and the adsorption vacuum degree P = -50Kpa. The vacuum adsorption force on the shielding jig 5 is approximately 6.4N, and the mass of the shielding jig 5 itself is approximately 1g. Therefore, the adsorption force on the shielding jig 5 is much greater than its own gravity, and the shielding jig 5 will not fall off when the lens 10 rotates and ink is sprayed.

[0045] In this embodiment, the first clamping jaw 3 and the second clamping jaw 4 both adopt vacuum suction nozzles, and the suction cups of the first clamping jaw 3 and the second clamping jaw 4 are arranged to face each other. The adsorption vacuum degree of the first clamping jaw 3 and the second clamping jaw 4 is set to be greater than the vacuum degree after the vacuum is evacuated in the cavity, so that the lens 10 and the shielding fixture 5 can be firmly fixed on the clamping jaws when the vacuum is evacuated in the cavity.

[0046] like Figure 5 and Figure 6As shown, it also includes a driving platform, on which a first guide rail 16 is arranged, and the first guide rail 16 is extended along the Y-axis direction. A mounting plate 18 is slidably connected to the first guide rail 16, and the lower chamber 2 is arranged on the mounting plate 18. A lifting cylinder 19 for driving the lower chamber 2 to move up and down is arranged on the mounting plate 18, and the lifting cylinder 19 is vertically fixed to the bottom of the mounting plate 18. The lower chamber 2 is connected to the output shaft of the lifting cylinder 19. A second guide rail 17 parallel to the first guide rail 16 is also arranged on the driving platform, and the second guide rail 17 is located above the first guide rail 16. The second guide rail 17 also extends along the Y-axis direction, and the upper chamber 1 is slidably connected to the second guide rail 17. The first guide rail 16 and the second guide rail 17 are both provided with a rodless cylinder to drive the mounting plate 18 to slide along the first guide rail 16, and drive the upper chamber 1 to slide along the second guide rail 17.

[0047] The driving platform is also provided with a CCD visual inspection device for correcting the position of the lens 10 and the shielding fixture 5. The CCD visual inspection device includes an upper CCD camera 14 and a lower CCD camera 15. The upper CCD camera 14 is installed on the machine platform above the second guide rail 17, and its lens faces downward to shoot the lens 10. The lower CCD camera 15 is installed on the machine platform below the first guide rail 16, and its lens faces upward to shoot the shielding fixture 5. After the CCD visual inspection device analyzes the shooting data, the first clamp 3 and the second clamp 4 adjust their positions so that the shielding fixture 5 corresponds to the optical zone 11 of the lens 10, and the initial positions of the upper cavity 1 and the lower cavity 2 are aligned with the cameras respectively. After shooting is completed, they are moved to the middle along the guide rail to achieve vertical alignment.

[0048] A UVW correction platform 21 is provided in the upper cavity 1, and the second clamping jaw 4 is provided on the UVW correction platform 21, so that the second clamping jaw 4 can move along the three axes of X, Y and Z for correction. A bonding cylinder 20 is provided at the bottom of the lower cavity 2, and the first clamping jaw 3 is provided on the bonding cylinder 20. After the cavity is closed, the bonding cylinder 20 drives the first clamping jaw 3 to move along the Z axis to make the lens 10 fit with the shielding fixture 5.

[0049] Second embodiment:

[0050] An inkjet shielding method for a lens 10, applied to the inkjet shielding device for a lens as described in the first embodiment, further comprising the following steps:

[0051] S1: The upper chamber 1 is separated from the lower chamber 2 to open the chamber, and the lens 10 is loaded into the lower chamber 2. The first clamping jaw 3 clamps the lens 10, and the second clamping jaw 4 clamps the shielding fixture 5;

[0052] S2: The upper chamber 1 and the lower chamber 2 are closed to form a closed space, and the chamber is evacuated through the vacuum port 8 to form a vacuum environment in the chamber;

[0053] S3: The second clamping jaw 4 attaches the shielding fixture 5 to the optical zone 11 on the side of the lens 10;

[0054] S4: Intake air through the air inlet 9 to break the vacuum of the cavity, so that a pressure difference is formed between the vacuum cavity of the shielding fixture 5 and the outside world, and the shielding fixture 5 is fixed on the lens 10 under the action of the pressure difference;

[0055] S5: The upper chamber 1 is separated from the lower chamber 2 to open the chamber, and the lens 10 is taken out for inkjet process, such as Figure 4 As shown, during inkjet printing, both sides of the lens 10 are coated with a plastic encapsulating jig 12 to prevent both sides of the lens 10 from being stained with ink;

[0056] S6: After the inkjet is completed, the lens 10 is returned to the first clamp 3, the lens 10 is re-fixed on the first clamp 3, the upper chamber 1 and the lower chamber 2 are closed to form a closed space, and the chamber is vacuumed again through the vacuum port 8;

[0057] S7: After the vacuum cavity of the shielding fixture 5 is evacuated, the air pressure in the vacuum cavity is balanced with that in the cavity, and the shielding fixture 5 is separated from the lens 10. Since the vacuum attraction fails at this time, the separation can be easily performed;

[0058] S8: Intake air through the air inlet 9 to break the vacuum of the cavity again;

[0059] S9: The upper cavity 1 is separated from the lower cavity 2 to open the cavity, and the lens 10 is taken out and unloaded.

[0060] It also includes a cleaning step. After the cavity is opened in step S9, a cleaning step is performed: the cleaning arm takes out the shielding jig 5 for cleaning, and after cleaning, it is dried. After drying, the shielding jig 5 is returned to the second clamping jaw 4. The cleaning and drying device is prior art and is not shown in the figure.

[0061] When cleaning the shielding jig 5 , a specific cleaning agent may be selected or ultrasonic cleaning may be performed according to the ink characteristics. In this embodiment, ultrasonic cleaning is performed on the shielding jig 5 in the cleaning step.

[0062] The method further includes a calibration step using the CCD visual inspection device described in the first embodiment. When the first clamp 3 clamps the lens 10 in step S1, the upper CCD camera 14 photographs the lens 10. When the shielding jig 5 is returned to the second clamp 4 in the cleaning step, the lower CCD camera 15 photographs the shielding jig 5. The CCD visual inspection device analyzes the photographed data, and the first clamp 3 and the second clamp 4 calibrate their positions so that the shielding jig 5 corresponds to the optical zone 11 of the lens 10. After the calibration step is completed, step S2 is performed.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens inkjet shielding device, characterized in that: The invention comprises a cavity and a shielding jig, wherein the cavity comprises a separable upper cavity and a lower cavity, wherein the upper cavity and the lower cavity form a closed space, wherein the cavity is connected with an exhaust pipe for vacuuming and an air inlet pipe for breaking the vacuum, wherein a first clamping jaw for grasping a lens and a second clamping jaw for grasping the shielding jig are arranged in the cavity, wherein a concave surface is arranged on the shielding jig, and when the shielding jig is attached to the lens, the concave surface covers the optical zone of the lens and forms a vacuum cavity.

2. The inkjet shielding device for lenses according to claim 1, characterized in that: The edge of the concave surface is provided with a circle of flexible sealing ring, and the sealing ring is in contact with the edge of the optical zone of the lens.

3. The inkjet shielding device for lenses according to claim 1, characterized in that: The first clamping jaw is arranged in the lower cavity, the second clamping jaw is arranged in the upper cavity, the air inlet pipe is connected to the side wall of the lower cavity, and the air exhaust pipe is connected to the side wall of the upper cavity.

4. The inkjet shielding device for lenses according to claim 1, characterized in that: The first clamping jaw and the second clamping jaw both adopt vacuum suction nozzles.

5. The inkjet shielding device for lenses according to claim 4, characterized in that: The adsorption vacuum degree of the first clamping jaw and the second clamping jaw is greater than the vacuum degree after the cavity is evacuated.

6. The inkjet shielding device for lenses according to claim 1, characterized in that: It also includes a driving platform, on which a first guide rail is arranged, on which a mounting plate is slidably connected, the lower cavity is arranged on the mounting plate, on which a lifting cylinder for driving the lower cavity to move up and down is arranged, and the driving platform is also provided with a second guide rail parallel to the first guide rail, and the upper cavity is slidably connected to the second guide rail.

7. The inkjet shielding device for lenses according to claim 6, characterized in that: The driving platform is provided with a CCD visual detection device for correcting the positions of the lens and the shielding fixture. The CCD visual detection device comprises an upper CCD camera and a lower CCD camera. The upper CCD camera is used to photograph the lens, and the lower CCD camera is used to photograph the shielding fixture.

8. A lens inkjet shielding method, applied to the lens inkjet shielding device according to any one of claims 1 to 7, characterized in that: The following steps are also included: S1: the upper cavity and the lower cavity are separated to open the cavity, the first clamping jaw clamps the lens, and the second clamping jaw clamps the shielding fixture; S2: the upper cavity and the lower cavity are closed to form a closed space, and the cavity is evacuated through the vacuum port; S3: The second clamping jaw fits the shielding fixture to the optical area on the side of the lens; S4: Intake air through the air inlet to break the vacuum of the cavity, and the shielding fixture is fixed on the lens under the action of air pressure difference; S5: the upper chamber is separated from the lower chamber to open the chamber, and the lens is taken out to perform an inkjet process; S6: After the inkjet is completed, the lens is returned to the first clamp, the upper cavity and the lower cavity are closed to form a closed space, and the cavity is vacuumed again through the vacuum port; S7: Separating the shielding fixture from the lens in the vacuumed cavity; S8: Intake air through the air inlet to break the vacuum of the cavity again; S9: The upper cavity is separated from the lower cavity to open the cavity, and the lens is taken out and unloaded.

9. The inkjet masking method for lenses according to claim 8, characterized in that: The cleaning step is also included. After the cavity is opened in step S9, the cleaning step is performed: the shielding jig is taken out for cleaning, and after cleaning, it is dried. After drying, the shielding jig is returned to the second clamping jaw.

10. The inkjet masking method for lenses according to claim 8, characterized in that: It also includes a calibration step using the CCD visual inspection device. When the first clamping jaw clamps the lens in step S1, the upper CCD camera takes a picture of the lens. When the shielding jig is returned to the second clamping jaw in the cleaning step, the lower CCD camera takes a picture of the shielding jig.

Images