A gradient porosity processing device for high oxygen permeable silicone hydrogel contact lenses

Abstract

The utility model belongs to optical device technical field especially a kind of gradient pore processing device of high oxygen-permeable silicon hydrogel contact lens, including bottom plate, the bottom plate top outer wall is fixedly connected with plate chain conveyor by screw, and the bottom plate top outer wall is fixedly connected with gantry by screw in the top of plate chain conveyor, the one end of the gantry top outer wall is fixedly connected with servo motor by screw.The utility model can drive intermittent feeding disc by servo motor drive main shaft, can accurately control feeding rhythm, cooperate with the positioning seat and the plug rod conveyed by plate chain conveyor, ensure that contact lens is stable in position during processing, solve the problem that traditional processing is difficult to control pore gradient, by cylinder push link plate drive porous stamping head and press needle down, press needle can realize gradient pore processing of different regions according to design, meet the oxygen-permeable demand of different parts of cornea, avoid the problem of eye discomfort caused by uneven oxygen permeability.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, and in particular to a gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses. Background Technology

[0002] Contact lenses, especially corneal contact lenses, are widely used vision correction tools in modern times. They need to have good optical performance, biocompatibility, and the ability to adapt to the shape of the cornea to ensure wearing comfort and corrective effect. Silicone hydrogel material has become one of the mainstream contact lens materials because it combines the high oxygen permeability of silicone with the moisturizing properties of hydrogel.

[0003] Traditional methods for improving oxygen permeability in contact lens manufacturing have some problems: Existing equipment often processes micropores at the edge or specific areas of the contact lens during operation, but the processing device lacks a precise intermittent feeding and positioning mechanism, resulting in uneven distribution of micropores and difficulty in gradient control, making it impossible to achieve pore gradient design according to the oxygen permeability requirements of different areas of the cornea. Meanwhile, during the processing, the contact lenses are not securely fixed and the imprinting accuracy is low, which can easily lead to problems such as inconsistent pore size and positional deviation, affecting the oxygen permeability and the quality of the contact lenses. In addition, the unloading process after processing is cumbersome, making it difficult to achieve continuous production and meet the needs of large-scale manufacturing. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses. This device overcomes the deficiencies of existing technologies and effectively solves the problems of difficult pore gradient control, uneven distribution, low processing accuracy, inability to achieve continuous production, and low material feeding efficiency when processing contact lenses with traditional devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses includes a base plate, a plate chain conveyor fixedly connected to the top outer wall of the base plate by screws, and a frame fixedly connected to the top of the plate chain conveyor by screws on the top outer wall of the base plate. A servo motor is fixedly connected to one end of the top outer wall of the frame by screws, and the output shaft of the servo motor is fixedly connected to a main shaft by a coupling. An intermittent feeding disc is welded to the bottom outer wall of the main shaft. The other end of the top outer wall of the platform is fixedly connected to a cylinder by screws, and the piston rod of the cylinder is fixedly connected to a connecting plate. An array of multi-hole imprinting heads are installed on the inner wall of the connecting plate, and the multi-hole imprinting heads and the bottom inner wall are provided with pressure needles. The inside of the plate chain conveyor is fixedly connected to a conveying plate by a chain, and a positioning seat is fixedly connected to the outer wall of the conveying plate. A rod for placing contact lenses is inserted into the top outer wall of the positioning seat.

[0006] Preferably, a photoelectric sensor is fixedly connected to one side of the outer wall of the platform by screws, and the photoelectric sensor is located above the insertion rod.

[0007] Preferably, adjacent linear bearings are installed at the other end of the top outer wall of the platform, and a guide rod is slidably connected to the inner wall of the linear bearing. An L-shaped corner bracket is fixedly connected to the bottom outer wall of the guide rod, and a spring is fixedly connected between the L-shaped corner bracket and the platform outside the guide rod.

[0008] Preferably, an array of positioning plates is welded to the inner wall of one side of the L-shaped corner code, and a positioning hole is provided at one end of the top outer wall of the positioning plate, the positioning hole being located below the multi-hole imprinting head.

[0009] Preferably, the top outer wall of the positioning seat has a slot, and the insertion rod is tightly attached to the inner wall of the slot.

[0010] Preferably, the top of the outer wall of the insertion rod is provided with a placement ring for fitting contact lenses.

[0011] Preferably, a material feeding auxiliary plate is provided on the outer wall of the insertion rod, and a material feeding frame is fixedly connected to one end of the top outer wall of the bottom plate by screws. The material feeding frame includes a guide section, a sliding section and a collecting section, wherein the lowest height of the material feeding auxiliary plate is adapted to the highest height of the guide section of the material feeding frame.

[0012] The beneficial effects of this utility model are as follows: 1. The gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses designed in this paper uses a servo motor to drive the spindle and drive the intermittent feeding plate, which can precisely control the feeding rhythm. Combined with the positioning seat and insertion rod conveyed by the plate chain conveyor, it ensures the stability of the contact lens position during processing, and solves the problem of difficult pore gradient control in traditional processing. 2. The gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses designed in this paper uses a cylinder to push the connecting plate to drive the multi-hole imprint head and the pressure needle downward. The pressure needle can realize gradient pore processing in different areas according to the design, so as to meet the oxygen permeability requirements of different parts of the cornea and avoid eye discomfort caused by uneven oxygen permeability. 3. The gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses designed in this paper uses linear bearings, guide rods and springs to guide and position the multi-pore imprinting head through the positioning holes on the positioning plate, thereby improving imprinting accuracy and avoiding pore position deviation. In addition, the feeding auxiliary plate on the insertion rod cooperates with the feeding frame to realize the automatic feeding and collection of processed contact lenses. Combined with the continuous conveying of the plate chain conveyor, a complete automated processing flow is formed, which helps to significantly improve production efficiency. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of a gradient pore processing device for a high oxygen permeability silicone hydrogel contact lens proposed in this utility model. Figure 2 This is a schematic diagram of the frame connection structure of a gradient pore processing device for a high oxygen permeability silicone hydrogel contact lens proposed in this utility model. Figure 3 for Figure 2 Enlarged schematic diagram of part A of the structure; Figure 4 This is a schematic diagram showing the disassembled structure of the porous imprint head, insert rod, and positioning seat of the gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses proposed in this utility model. Figure 5 This is a schematic diagram showing the distribution structure of the guide section, sliding section, and collection section of the unloading rack.

[0014] In the diagram: 1. Base plate; 2. Plate chain conveyor; 3. Frame; 4. Servo motor; 5. Main shaft; 6. Intermittent feeding tray; 7. Cylinder; 8. Connecting plate; 9. Multi-hole imprinting head; 10. Imprinting needle; 11. Conveyor plate; 12. Positioning seat; 13. Insert rod; 14. Photoelectric sensor; 15. Linear bearing; 16. Guide rod; 17. L-shaped corner bracket; 18. Spring; 19. Positioning plate; 20. Positioning hole; 21. Slot; 22. Placement ring; 23. Unloading auxiliary tray; 24. Unloading rack. Detailed Implementation

[0015] 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.

[0016] Reference Figures 1-5 Example 1: A gradient pore processing device for high oxygen permeability silicone hydrogel contact lenses includes a base plate 1. A plate chain conveyor 2 is fixedly connected to the top outer wall of the base plate 1 by screws. A frame 3 is fixedly connected to the top of the plate chain conveyor 2 by screws. A servo motor 4 is fixedly connected to one end of the top outer wall of the frame 3 by screws. The output shaft of the servo motor 4 is fixedly connected to a main shaft 5 by a coupling. An intermittent feeding disc 6 is welded to the bottom outer wall of the main shaft 5.

[0017] With the above scheme, the base plate 1 is used to support the entire device, and then the conveyor plate 11 in the plate chain conveyor 2 moves to drive the related components to achieve continuous movement. The frame 3 is used to install and fix core components such as servo motor 4 and cylinder 7. When the servo motor 4 is working, it drives the main shaft 5 to rotate through the coupling, thereby causing the intermittent feeding plate 6 to rotate intermittently according to the set rhythm, so as to achieve precise feeding control of the contact lens processing station and avoid processing chaos caused by continuous feeding.

[0018] In embodiment 2, a cylinder 7 is fixedly connected to the other end of the top outer wall of the frame 3 by screws, and a connecting plate 8 is fixedly connected to the piston rod of the cylinder 7. A multi-hole imprinting head 9 is installed on the inner wall of the connecting plate 8, and a pressure needle 10 is provided on the bottom inner wall of the multi-hole imprinting head 9. A conveying plate 11 is fixedly connected to the inside of the plate chain conveyor 2 by a chain, and a positioning seat 12 is fixedly connected to the outer wall of the conveying plate 11. A rod 13 for placing contact lenses is inserted into the top outer wall of the positioning seat 12, and a placement ring 22 for fitting contact lenses is provided on the top of the outer wall of the rod 13.

[0019] Through the above scheme, the piston rod of cylinder 7 can extend and retract to drive the connecting plate 8 to move up and down. The connecting plate 8 is used to install the multi-hole imprint head 9, so that multiple multi-hole imprint heads 9 are kept in an array distribution to ensure that multiple contact lenses are processed at the same time. The pressure needle 10 at the bottom of the multi-hole imprint head 9 can press out pores of different densities and sizes on the contact lens according to the requirements of the gradient pore design. The chain inside the plate chain conveyor 2 drives the conveyor plate 11 to move. The positioning seat 12 is fixed on the conveyor plate 11 to provide insertion and fixation for the insertion rod 13. The insertion rod 13 is used to place the contact lens. Its top placement ring 22 is adapted to the shape of the contact lens, so that the contact lens can be stably and securely placed, avoiding displacement of the contact lens during processing.

[0020] A photoelectric sensor 14 is fixedly connected to one side of the outer wall of the stand 3 by screws, and the photoelectric sensor 14 is located above the insertion rod 13.

[0021] Through the above scheme, the photoelectric sensor 14 is used to monitor whether each set of insert rods 13 has moved to the processing station. When the photoelectric sensor 14 detects that the insert rod 13 has reached the designated position, it will send a signal, and the intermittent feeding plate 6 will control the conveyor plate 11 in the plate chain conveyor 2 to stop conveying. Then, the cylinder 7 will start to press down and perform other actions to ensure accurate processing timing and avoid processing failure due to station deviation.

[0022] The other end of the top outer wall of the frame 3 is equipped with adjacent linear bearings 15, and a guide rod 16 is slidably connected to the inner wall of the linear bearing 15. An L-shaped corner bracket 17 is fixedly connected to the bottom outer wall of the guide rod 16, and a spring 18 is fixedly connected between the L-shaped corner bracket 17 and the frame 3 outside the guide rod 16. An array of positioning plates 19 is welded to the inner wall of one side of the L-shaped corner bracket 17, and a positioning hole 20 is opened at one end of the top outer wall of the positioning plate 19. The positioning hole 20 is located below the multi-hole imprint head 9.

[0023] Through the above scheme, the linear bearing 15 provides sliding guidance for the guide rod 16, enabling the guide rod 16 to move stably up and down, and driving the L-shaped corner bracket 17 to move synchronously. The spring 18 is sleeved on the outside of the guide rod 16, with its two ends connected to the L-shaped corner bracket 17 and the platform 3 respectively. When the L-shaped corner bracket 17 moves down, the spring 18 is compressed, and after being released, it can drive it to return to its original position. The positioning plate 19 on the L-shaped corner bracket 17 corresponds to the multi-hole imprint head 9, and the positioning hole 20 is set below the multi-hole imprint head 9. During the imprinting process, the multi-hole imprint head 9 is precisely guided to prevent it from deviating and improve the imprinting accuracy.

[0024] The top outer wall of the positioning seat 12 has a slot 21, and the insertion rod 13 is in close contact with the inner wall of the slot 21.

[0025] With the above solution, the slot 21 on the top of the positioning seat 12 is adapted to the shape of the insertion rod 13. After the insertion rod 13 is inserted into the slot 21, it can fit tightly, ensuring that the insertion rod 13 will not shake or shift during the processing, further ensuring the processing position accuracy of the contact lens, and also facilitating the disassembly and replacement of the insertion rod 13 for easy maintenance.

[0026] A feeding auxiliary plate 23 is provided on the outer wall of the insertion rod 13, and a feeding frame 24 is fixedly connected to one end of the top outer wall of the base plate 1 by screws. The feeding frame 24 includes a guide section, a sliding section and a collecting section. The lowest height of the feeding auxiliary plate 23 is matched with the highest height of the guide section of the feeding frame 24.

[0027] With the above scheme, the feeding auxiliary plate 23 on the insertion rod 13 moves with the insertion rod 13. When it moves to the position of the feeding rack 24, since the lowest height of the feeding auxiliary plate 23 is matched with the highest height of the guide section of the feeding rack 24, the feeding auxiliary plate 23 can smoothly slide into the guide section of the feeding rack 24. Then the contact lens enters the sliding section along the guide section and finally slides down to the collection section to complete the collection.

[0028] Working principle: First, the silicone hydrogel contact lens to be processed is placed on the placement ring 22 at the top of the insertion rod 13, and the insertion rod 13 is inserted into the slot 21 of the positioning seat 12 for fixation. After the device is started, the servo motor 4 drives the main shaft 5 to drive the intermittent feeding plate 6 to rotate intermittently, thereby controlling the movement of the conveying plate 11, positioning seat 12, and insertion rod 13 in the plate chain conveyor 2; When the photoelectric sensor 14 detects that a set of insertion rods 13 have moved to the processing station, it sends a signal to stop the servo motor 4. Then the piston rod of the cylinder 7 extends, pushing the connecting plate 8 to move the multi-hole imprint head 9 and the pressure needle 10 downward. At this time, the guide rod 16 slides in the linear bearing 15, the L-shaped corner bracket 17 moves downward, the spring 18 is compressed, the positioning hole 20 on the positioning plate 19 guides the multi-hole imprint head 9, and the pressure needle 10 presses out gradient holes on the contact lens. After the imprinting is completed, the piston rod of cylinder 7 retracts, and spring 18 resets, causing L-shaped corner bracket 17 and positioning plate 19 to rise. Servo motor 4 then drives intermittent feeding disc 6 to rotate, controlling the movement of conveyor plate 11, which in turn moves insertion rod 13 and the processed contact lenses. When insertion rod 13 moves to the unloading rack 24, unloading auxiliary disc 23 on insertion rod 13 slides into the guide section of unloading rack 24, and the contact lenses slide down through the guide section and sliding section to the collection section for collection.

[0029] 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 device for gradient porosity processing of high oxygen permeable silicone hydrogel contact lenses, comprising a base plate (1), characterized in that, The top outer wall of the base plate (1) is fixedly connected to the plate chain conveyor (2) by screws, and the top outer wall of the base plate (1) is fixedly connected to the frame (3) at the top of the plate chain conveyor (2) by screws. One end of the top outer wall of the frame (3) is fixedly connected to the servo motor (4) by screws, and the output shaft of the servo motor (4) is fixedly connected to the main shaft (5) by a coupling. The bottom outer wall of the main shaft (5) is welded with an intermittent feeding disc (6). The other end of the top outer wall of the platform (3) is fixedly connected to a cylinder (7) by screws, and the piston rod of the cylinder (7) is fixedly connected to a connecting plate (8). The inner wall of the connecting plate (8) is equipped with an array of multi-hole imprint heads (9), and the bottom inner wall of the multi-hole imprint heads (9) is provided with pressure needles (10). The inside of the plate chain conveyor (2) is fixedly connected to a conveyor plate (11) by a chain, and the outer wall of the conveyor plate (11) is fixedly connected to a positioning seat (12). The top outer wall of the positioning seat (12) is inserted with a rod (13) for placing contact lenses.

2. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 1, wherein, A photoelectric sensor (14) is fixedly connected to one side of the outer wall of the stand (3) by screws, and the photoelectric sensor (14) is located above the insertion rod (13).

3. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 1, wherein, The other end of the top outer wall of the platform (3) is equipped with adjacent linear bearings (15), and a guide rod (16) is slidably connected on the inner wall of the linear bearing (15). An L-shaped bracket (17) is fixedly connected to the bottom outer wall of the guide rod (16), and a spring (18) is fixedly connected between the L-shaped bracket (17) and the platform (3) outside the guide rod (16).

4. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 3, wherein, The L-shaped corner code (17) has an array of positioning plates (19) welded to the inner wall of one side, and a positioning hole (20) is provided at one end of the top outer wall of the positioning plate (19), and the positioning hole (20) is located below the multi-hole imprint head (9).

5. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 1, wherein, The top outer wall of the positioning seat (12) is provided with a slot (21), and the insertion rod (13) is in close contact with the inner wall of the slot (21).

6. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 1, wherein, The top of the outer wall of the insert (13) is provided with a placement ring (22) for fitting contact lenses.

7. The device for making a gradient porous high oxygen permeable silicone hydrogel contact lens according to claim 1, wherein, The outer wall of the insertion rod (13) is provided with a feeding auxiliary plate (23), and one end of the top outer wall of the bottom plate (1) is fixedly connected to a feeding rack (24) by screws. The feeding rack (24) includes a guide section, a sliding section and a collecting section. The lowest height of the feeding auxiliary plate (23) is adapted to the highest height of the guide section of the feeding rack (24).

Images