Mold, apparatus for molding contact lenses, method of manufacturing contact lenses

Abstract

This invention relates to a mold, apparatus, and method for manufacturing contact lenses. The mold includes: a concave mold having a forming recess; and a first convex mold having a first forming protrusion. The first forming protrusion has a closed-shaped groove and is used to mate with the forming recess to form a first forming cavity. Using this mold to manufacture contact lenses solves the problem of how to incorporate flexible circuitry within the contact lens, which is beneficial for improving the monitoring sensitivity and wearing comfort of the resulting contact lenses.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a mold, equipment, and method for preparing contact lenses. Background Technology

[0002] With the development of intelligent contact lenses, they can not only display images, but also achieve highly sensitive monitoring of parameters such as tension, pressure, and deformation.

[0003] Taking intraocular pressure monitoring as an example, long-term intraocular pressure monitoring is a necessary means for early detection of glaucoma, postoperative glaucoma disease control, and drug control of intraocular pressure. However, there is no long-term intraocular pressure monitoring device that is acceptable to the general public. Therefore, long-term intraocular pressure monitoring devices that are inexpensive to manufacture, fully flexible, and user-friendly are a hot topic of interest in both academia and industry.

[0004] Incorporating variable capacitance or variable inductance LC oscillators as intraocular pressure sensors in contact lenses is a good approach to meet the requirement of low cost due to its passive nature. Among these, variable inductance oscillators have received more attention because they do not suffer from capacitor leakage. However, the sensitivity of intraocular pressure measurement is related to the sensitivity of the contact lens to changes in intraocular pressure; therefore, a low overall elastic modulus is required for the contact lens.

[0005] Currently, the substrate for contact lenses that monitor intraocular pressure is silicone hydrogel, with an elastic modulus of only 6.5–14 MPa. Metal circuitry is then transferred onto the substrate using methods such as printing to form the intraocular pressure sensor. While maintaining conductivity, the elastic modulus of the metal circuitry formed in this method often reaches the GPa level, thus affecting the overall elastic modulus of the contact lens. Therefore, traditional printing methods are unsuitable for manufacturing highly sensitive intraocular pressure contact lenses.

[0006] Therefore, how to improve the monitoring sensitivity of parameters such as tension, pressure, and deformation of contact lenses without affecting the elastic modulus of the contact lenses is a technical problem that urgently needs to be solved. Summary of the Invention

[0007] Therefore, it is necessary to provide a mold, equipment, and method for preparing contact lenses that can improve monitoring sensitivity.

[0008] The present invention is achieved through the following technical solution.

[0009] One aspect of the present invention provides a mold for forming contact lenses, comprising:

[0010] A die having a forming recess; and

[0011] The first punch has a first forming protrusion, the first forming protrusion having a closed-shaped groove, the first forming protrusion being used to cooperate with the forming groove to form a first forming cavity.

[0012] In some embodiments, the width of the groove is 0.2 mm to 1 mm;

[0013] And / or, the depth of the groove is 0.05mm to 1mm;

[0014] And / or, there are two or more grooves, wherein at least one of the grooves surrounds the outside of another groove;

[0015] And / or, the groove is annular or polygonal.

[0016] In some embodiments, the molding recess has a molding concave arc surface, and the first molding protrusion has a first molding convex arc surface, the first molding convex arc surface being able to press against the molding concave arc surface.

[0017] In some embodiments, the groove is located on the first shaped convex surface and is arranged circumferentially around the first shaped convex surface.

[0018] In some embodiments, the mold further includes a second punch having a second forming protrusion for engaging with the forming recess to form a second forming cavity.

[0019] Another aspect of the present invention provides an apparatus for forming contact lenses, comprising:

[0020] The molds described above are used for the curing and molding of contact lenses; and

[0021] A driving device is used to move the first punch along the shape trajectory of the groove with the groove facing upward before the contact lens is cured and molded, so as to arrange the flexible circuit in the groove of the first punch.

[0022] In some embodiments, the device further includes:

[0023] An unwinding device is used to unwind the flexible circuit while arranging it in the closed-shaped groove of the first punch.

[0024] In some embodiments, the device further includes:

[0025] The positioning device includes a power supply device and a positioning wire;

[0026] Wherein, the positioning wire is positioned below the flexible circuit within the groove and is parallel to and opposite to the flexible circuit within the groove; the energizing device is used to supply current in the same direction to the positioning wire and the flexible circuit; or,

[0027] The positioning wire is positioned above the flexible line in the groove and is parallel to and opposite to the flexible line in the groove. The energizing device is used to supply current in opposite directions to the positioning wire and the flexible line.

[0028] In some embodiments, the driving device is a rotating device;

[0029] The groove is annular, and the positioning wire is annular and is used to correspond to the groove.

[0030] In another aspect, the present invention provides a method for manufacturing a contact lens, using the mold or equipment described above, the method comprising the following steps:

[0031] A flexible circuit is placed in the groove of the first punch, and an electronic component is connected to the flexible circuit to form an electronic device, thus obtaining a first punch loaded with the electronic device;

[0032] The first punch containing the electronic device is pressed onto the concave mold containing the film-forming material, and the film-forming material is cured to form a film containing the electronic device. The mold is then removed to obtain the contact lens.

[0033] In some embodiments, the step of placing the flexible circuitry in the closed-shaped groove of the first punch includes the following steps:

[0034] The first punch is moved along the shape trajectory of the groove with the groove facing upwards;

[0035] One end of the flexible circuit is placed in the groove, and as the first punch rotates, the other end of the flexible circuit is also placed in the groove.

[0036] In some embodiments, before placing one end of the flexible circuit into the groove, the following steps are further included:

[0037] Positive photoresist is placed in the groove to fix the flexible circuit.

[0038] In some embodiments, after forming a diaphragm containing the electronic device within the concave mold, the first punch is removed, and film-forming material is injected onto the diaphragm of the concave mold. Then, a second punch is pressed onto the concave mold, cured, and the concave mold and the second punch are removed.

[0039] Using the above-mentioned mold to prepare contact lenses, flexible circuits can be set in the closed-shaped groove of the first convex mold to form electronic devices. Then, the first convex mold and the concave mold are pressed together to form a film material and place the electronic devices in the film. In this way, there is no need to use adhesive to attach the flexible circuits to the film body of the lens. This avoids the problems of adhesives being dissolved during hydration and wearing, which may damage the eyes, and the elastic modulus of the adhesives affecting the elastic modulus of the contact lenses. It also overcomes the problem that printing and other methods are not suitable for making high-sensitivity intraocular pressure contact lenses. In addition, it solves the problem of how to set the flexible circuits in the contact lenses, which is conducive to improving the monitoring sensitivity and wearing comfort of the produced contact lenses. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a state of a mold for forming contact lenses according to an embodiment of the present invention;

[0041] Figure 2 for Figure 1 The diagram shows the structure of the concave mold in the mold.

[0042] Figure 3 for Figure 1 The diagram shows the structure of the first punch in the mold.

[0043] Figure 4 for Figure 3 The image shows a bottom view of the first punch.

[0044] Figure 5 This is a schematic diagram of another state of a mold for forming contact lenses according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of a state of an apparatus for forming contact lenses according to an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Mold; 110. Die; 112. Forming recess; 120. First punch; 122. First forming protrusion; 1221. Groove; 101. First forming cavity; 201. Flexible circuit; 130. Second punch; 132. Second forming protrusion; 102. Second forming cavity; 200. Drive device; 300. Unwinding device. Detailed Implementation

[0048] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] The terms “vertical,” “horizontal,” “up,” “down,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0054] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] Those skilled in the art have discovered that high-sensitivity monitoring of parameters such as tension, pressure, and deformation in contact lenses requires a low elastic modulus in the substrate and conductive wires of the contact lens, thereby enabling higher sensitivity in sensing minute changes in parameters such as tension, pressure, and deformation of the eyeball.

[0057] The mainstream traditional manufacturing process for soft contact lenses is molding. The process involves injecting liquid raw material into a mold; the front and back surfaces of the lens depend on the shape of the mold. After the material is injected, radiant heat polymerizes the material until a complete reaction and polymerization occur. Further, the lens edges can be polished to meet the requirements of the finished product; after edge polishing, the lens is immersed in physiological saline solution for hydration.

[0058] Integrating flexible conductive lines (i.e., flexible circuitry) into the interior of contact lenses enables the monitoring of parameters such as tension, pressure, and deformation, and even real-time treatment of diseases. For this purpose, some technologies use adhesives to bond the flexible circuitry to the lens body. However, the adhesives used in these bonding processes can dissolve during hydration and wear, potentially damaging the eyes. Furthermore, the elastic modulus of the adhesive also affects the elastic modulus of the contact lens, thus impacting the lens's monitoring sensitivity and wearing comfort.

[0059] Please see Figure 1 One embodiment of the present invention provides a mold 100 for forming contact lenses, including a concave mold 110 and a first convex mold 120.

[0060] Please see Figure 1 and Figure 2 The die 110 has a forming recess 112.

[0061] Please see Figure 1 and Figure 3 The first punch 120 has a first forming protrusion 122. The first forming protrusion 122 is provided with a closed-shaped groove 1221 (e.g., Figure 4 (As shown).

[0062] Please continue reading. Figure 1 The first molding protrusion 122 is used to cooperate with the molding recess 112 to form the first molding cavity 101.

[0063] The mold 100 described above can be used for contact lens molding, but is not limited thereto. When the mold 100 is used for contact lens molding, the method for preparing the contact lens includes the following steps S12 to S14:

[0064] Step S12: Place the flexible circuit 201 in the groove 1221 of the first punch 120, and connect the electronic component (not shown) to the flexible circuit 201 to form an electronic device, thereby obtaining the first punch 120 loaded with the electronic device;

[0065] Step S14: Press the first punch 120 containing electronic devices onto the concave die 110 containing film-forming material, and allow the film-forming material to solidify to form a film containing electronic devices. Remove the mold 100 to obtain the contact lens.

[0066] Using the mold 100 described above to prepare contact lenses, flexible circuits 201 can be set in the groove 1221 of the first convex mold 120 to form electronic devices. Then, the first convex mold 120 and the concave mold are pressed together to form a film material and the electronic devices are placed in the film. In this way, there is no need to use adhesive to attach the flexible circuits 201 to the film body of the lens. This avoids the problem that the adhesive used for adhesives may dissolve during the hydration process and wear, thus damaging the eyes. It also avoids the problem that the elastic modulus of the adhesive used for adhesives may affect the elastic modulus of the contact lens. Furthermore, it overcomes the problem that printing and other methods are not suitable for making high-sensitivity intraocular pressure contact lenses. In this way, it solves the problem of how to set the flexible circuits 201 in the contact lens, which is conducive to improving the monitoring sensitivity and wearing comfort of the prepared contact lenses.

[0067] Because the flexible circuit 201 is soft and lightweight, and the diaphragm of a contact lens is also very soft, even liquid in the molding process, fixing the flexible circuit 201 within a smart contact lens has become an industrial challenge. Using the aforementioned mold 100 to manufacture contact lenses solves the problem of integrating the flexible circuit 201 with its low elastic modulus into the contact lens. This allows for the integration of the even lower elastic modulus flexible circuit 201 into the original diaphragm body of the contact lens. The lower elastic modulus of the flexible circuit 201 results in a higher sensitivity to detecting minute changes in parameters such as tension, pressure, and deformation of the eyeball. This improves the sensitivity of the contact lens to these parameters while almost completely preserving its original elastic modulus, and also facilitates low-cost mass production.

[0068] Please continue reading. Figure 3 In some embodiments, the width of the groove 1221 is 0.2 mm to 1 mm. Further, the width of the groove 1221 is primarily determined by the diameter of the flexible line 201; for example, the lower limit of the width of the groove 1221 is the diameter of the flexible line 201, and the upper limit can be 1.1 to 1.2 times the diameter of the flexible line 201. In some examples, the diameter of the flexible line can be 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0069] In some embodiments, the depth of the groove 1221 is 0.05 mm to 1 mm. Preferably, the depth of the groove does not exceed the diameter of the flexible circuit and is not less than 1 / 4 of the diameter of the flexible circuit.

[0070] Furthermore, in some examples, the depth of the groove 1221 is between 1 / 4 times the width of the groove 1221 and the width of the groove 1221.

[0071] In some embodiments, the molding recess 112 has a molding concave arc surface, and the first molding protrusion 122 has a first molding convex arc surface. The first molding convex arc surface can be pressed against the molding concave arc surface to form a first molding cavity 101.

[0072] Please see Figure 3 and Figure 4 Furthermore, the groove 1221 is located on the first shaped convex surface. Furthermore, the groove 1221 is arranged circumferentially around the first shaped convex surface, which facilitates the formation of a ring-shaped inductor coil.

[0073] Furthermore, in Figure 3 and Figure 4 In a specific example, groove 1221 is annular, such as a circular ring.

[0074] Understandably, in other examples, the groove 1221 may also be polygonal, such as rectangular, to facilitate the formation of a rectangular inductor coil. Understandably, the groove 1221 may also be other irregular shapes. Furthermore, the groove edge of the groove 1221 may be straight or curved, or it may be serrated.

[0075] In some embodiments, there are two or more grooves 1221, wherein at least one groove 1221 surrounds the outside of another groove 1221.

[0076] Furthermore, the other grooves 1221 are arranged in layers on the outside of one of the grooves 1221. For example, there are three grooves 1221, namely the first groove, the second groove and the third groove, with the second groove surrounding the outside of the first groove and the third groove surrounding the outside of the second groove.

[0077] In some embodiments, before placing one end of the flexible line 201 into the groove 1221, the following step S11 is included: a positive photoresist is placed in the groove 1221 to fix the flexible line 201. The positive photoresist serves to temporarily fix the flexible line 201, preventing it from detaching from the groove 1221 before the pressing step in step S14. Furthermore, since the positive photoresist can decompose under light, it can be decomposed under the light curing conditions of the film-forming material in step S14, and can then be removed, for example, using a developer. This ensures good material adhesion between the flexible line 201 or the electronic device and the film-forming material in the mold 110, allowing the first punch 120 to separate well from the film-forming material of the flexible line 201 that has been cured to form a film containing the electronic device, thereby fixing the flexible line 201 or the electronic device within the cured film.

[0078] Please see Figure 5 In some embodiments, the mold 100 further includes a second punch 130. The second punch 130 has a second forming protrusion 132 for engaging with a forming recess 112 to form a second forming cavity 102. Accordingly, the second forming protrusion 132 has a second forming arcuate surface that can press against the forming arcuate surface of the forming recess 112 to form the second forming cavity 102.

[0079] In order to better cover the flexible circuit 201 or electronic device with film-forming material, after forming a film containing electronic device in the concave mold 110, the first convex mold 120 is removed, and film-forming material is injected into the film in the concave mold 110. The second convex mold 130 is pressed with the concave mold 110 to form another film on the film containing electronic device, thereby producing a contact lens.

[0080] That is, the above-mentioned method for preparing contact lenses also includes the following step S16:

[0081] After forming a diaphragm containing built-in electronic devices in the concave mold 110, the first convex mold 120 is removed, and film-forming material is injected onto the diaphragm in the concave mold 110. Then, the second convex mold 130 is pressed onto the concave mold 110, cured, and the concave mold 110 and the second convex mold 130 are removed.

[0082] Furthermore, after removing the first punch 120 in step S16 and before continuing to inject film-forming material onto the film in the die 110, the following step is also included: removing residual photoresist from the surface of the film inside the die 110 after photocuring. For example, a developer can be used to clean the surface of the film inside the die 110 to remove the aforementioned positive photoresist.

[0083] It is understood that after step S16, further processing steps such as hydration, disinfection, and packaging of contact lenses may be included.

[0084] Please see Figure 6 One embodiment of the present invention provides an apparatus for forming contact lenses, including a mold 100 and a driving device 200 as described above.

[0085] The mold 100 mentioned above is used for the curing and molding of contact lenses.

[0086] The drive device 200 is used to move the first punch 120 along the shape trajectory of the groove 1221 with the groove 1221 facing upward before the contact lens is cured and molded, so as to arrange the flexible line 201 in the groove 1221 of the first punch 120.

[0087] In such Figure 6 In a specific example, for instance, if the groove 1221 is an annular groove, then the control drive device 200 drives the first punch 120 to move along an annular trajectory with the groove 1221 facing upwards. Further, the drive device 200 is a rotating device.

[0088] For example, in other examples, the groove 1221 is a rectangular groove, and the control drive device 200 drives the first punch 120 to move along a rectangular trajectory with the groove 1221 facing upward.

[0089] Furthermore, under the control of the drive device 200, the flexible circuit 201 is arranged in the groove 1221 of the first punch 120 to form a spiral inductor coil.

[0090] Thus, in step S12 of the above-mentioned method for preparing contact lenses, placing the flexible circuit 201 in the groove 1221 of the first punch 120 includes the following steps S121 to S122:

[0091] Step S121: Move the first punch 120 along the shape trajectory of the groove with the groove 1221 facing upward.

[0092] Step S122: Place one end of the flexible circuit 201 into the groove 1221. As the first punch 120 rotates, place the other end of the flexible circuit 201 into the groove 1221.

[0093] Because the flexible circuit 201 is soft and lightweight, and the film of contact lenses is also very soft, even liquid in the molding process, fixing the flexible circuit 201 in smart contact lenses has become an industrial challenge. This invention, based on the groove 1221 on the first punch 120, further employs a driving device 200 to move the first punch 120 along the shape trajectory of the groove with the groove 1221 facing upwards. This gradually inserts the flexible circuit 201 into the groove 1221 as the first punch 120 rotates, cleverly solving the problem of fixing the flexible circuit 201. Furthermore, by providing the aforementioned positive photoresist within the groove 1221, temporary fixation of the flexible circuit 201 within the groove 1221 is facilitated.

[0094] Further, in steps S121 and S122, the first punch 120 is located on the driving device 200. Further, the driving device 200 has a turntable, and the first punch 120 is disposed on the turntable. Further, the driving device 200 also includes a motor, which is connected to the turntable and used to drive the turntable to rotate.

[0095] In some embodiments, the above-described device further includes an unwinding device 300. The unwinding device 300 is used to unwind the flexible circuit 201 while it is being arranged in the groove 1221 of the first punch 120. Thus, the length and unwinding speed of the flexible circuit 201 can be precisely controlled by the unwinding device 300. After the flexible circuit 201 is placed in the groove 1221 of the first punch 120, electronic components can be connected to the flexible circuit 201 to form an electronic device, resulting in a first punch 120 loaded with the electronic device.

[0096] For example, in a specific example, the electronic device is an LC oscillator. The electronic component is a capacitor, which together with the inductor formed by the flexible circuit 201 forms the LC oscillator. After the flexible circuit 201 is placed in the groove 1221 of the first punch 120, a miniature capacitor is picked up and placed at both ends of the flexible circuit 201 for welding.

[0097] In some embodiments, the device further includes a positioning device (not shown). The positioning device includes an energizing device and a positioning wire. Further, the positioning wire is positioned below the flexible line 201 within the groove 1221 and parallel to the flexible line 201 within the groove 1221. The energizing device supplies current in the same direction to the positioning wire and the flexible line 201. This supply of current in the same direction to the positioning wire and the flexible line 201 creates an attractive force between them, thereby ensuring that the flexible line 201 is well positioned within the groove 1221 during the rotation of the first punch 120, improving alignment accuracy.

[0098] Specifically, the positioning wire can be located inside, above, or below the driving device 200, or even embedded within the first punch 120. This is as long as the positioning wire is positioned below the flexible circuit within the groove 1221.

[0099] In another example, a positioning guide is positioned above the flexible line 201 within the groove 1221 and parallel to it. An energizing device supplies current in opposite directions to the positioning guide and the flexible line 201. This supply of current in opposite directions creates a repulsive force between the parallel-positioned guide and the flexible line 201, thereby ensuring that the flexible line 201 is well positioned within the groove 1221 during the rotation of the first punch 120, improving alignment accuracy.

[0100] Understandably, at this point, the positioning wire only needs to be placed above the flexible line within the groove 1221.

[0101] Furthermore, the positioning guide can be provided corresponding to the groove 1221. For example, if the groove 1221 is annular, the positioning guide is an annular guide. Or, for example, if the groove 1221 is polygonal, such as rectangular, the positioning guide is polygonal, such as rectangular.

[0102] In a specific example, the method for preparing a contact lens includes the following steps:

[0103] First, positive photoresist is applied to the groove 1221 of the first punch 120 to temporarily fix the gradually inserted flexible circuit 201. The unwinding device 300 automatically ejects the flexible circuit 201 from top to bottom at a uniform speed, and precisely controls the length and speed of ejection. After ejection, the position is aligned with the groove 1221 of the first punch 120. At the same time, the driving device 200 drives the first punch 120 to rotate, ensuring that the flexible circuit 201 falls evenly in the entire groove 1221 at all times. Finally, after the required length of flexible circuit 201 is arranged in the groove 1221, the driving device 200 and the unwinding device 300 stop working, and the electronic components are picked up and placed at both ends of the flexible circuit 201 for soldering.

[0104] One embodiment of the present invention provides a contact lens, including a diaphragm body and an electronic device disposed within the diaphragm body. The electronic device uses a flexible circuit 201, and the elastic modulus of the flexible circuit 201 is less than the elastic modulus of the diaphragm body.

[0105] Based on the mold 100 and equipment for forming contact lenses described above, the present invention can integrate a flexible circuit 201 with an elastic modulus less than that of the diaphragm body into a contact lens, thereby obtaining the aforementioned contact lens.

[0106] In some embodiments, the contact lens body includes a first diaphragm and a second diaphragm, with all or part of the electronic device housed in the first diaphragm, and the second diaphragm adhered to the first diaphragm to completely enclose the electronic device. It is understood that the film-forming materials of the first and second diaphragms may be the same or different.

[0107] In some embodiments, the diaphragm body does not contain an adhesive.

[0108] In some embodiments, the diaphragm body is made of a flexible material. Further, the elastic modulus of the diaphragm body is 6.5–14 MPa. In one specific example, the diaphragm body is made of silicone.

[0109] In some embodiments, the elastic modulus of the flexible circuit 201 is no greater than 10 MPa. Further, the flexible circuit 201 is made of liquid metal silicone, wherein the liquid metal may be a gallium-indium alloy.

[0110] In some embodiments, the electronic device is an LC oscillator.

[0111] It is understood that the aforementioned contact lenses may be intraocular pressure monitoring contact lenses.

[0112] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A mold for forming contact lenses, characterized in that, include: The die (110) has a forming recess (112). and The first punch (120) has a first forming protrusion (122), the first forming protrusion (122) has a closed groove (1221), the first forming protrusion (122) is used to cooperate with the forming recess (112) to form a first forming cavity (101), the groove (1221) is used to place the flexible circuit of the contact lens.

2. The mold as described in claim 1, characterized in that, The width of the groove (1221) is 0.2mm~1mm; And / or, the depth of the groove (1221) is 0.05mm~1mm; And / or, there are two or more grooves (1221), wherein at least one of the grooves (1221) surrounds the outside of another groove (1221); And / or, the groove (1221) is annular or polygonal.

3. The mold as described in any one of claims 1 to 2, characterized in that, The molding recess (112) has a molding concave arc surface, and the first molding protrusion (122) has a first molding convex arc surface, which can be pressed against the molding concave arc surface.

4. The mold as described in claim 3, characterized in that, The groove (1221) is located on the first shaped convex surface, and the groove (1221) is arranged circumferentially around the first shaped convex surface.

5. The mold as described in any one of claims 1 to 2 and 4, characterized in that, The mold further includes a second punch (130) having a second forming protrusion (132) for engaging with the forming recess (112) to form a second forming cavity (102).

6. An apparatus for forming contact lenses, characterized in that, include: The mold (100) as described in any one of claims 1 to 5 is used for the curing and molding of contact lenses; and A drive device (200) is used to move the first punch (120) along the shape trajectory of the groove (1221) with the groove (1221) facing upward before the contact lens is cured, so as to arrange the flexible circuit in the groove (1221) of the first punch (120).

7. The device as described in claim 6, characterized in that, The device also includes: An unwinding device (300) is used to unwind the flexible circuit while arranging the flexible circuit in the groove (1221) of the first punch (120).

8. The device as described in claim 6 or 7, characterized in that, The device also includes: The positioning device includes a power supply device and a positioning wire; Wherein, the positioning wire is used to be disposed below the flexible circuit in the groove (1221) and is arranged parallel to and opposite to the flexible circuit in the groove (1221); the energizing device is used to pass current in the same direction to the positioning wire and the flexible circuit; or, The positioning wire is positioned above the flexible line in the groove (1221) and is parallel to the flexible line in the groove (1221). The energizing device is used to supply current in opposite directions to the positioning wire and the flexible line.

9. The device as described in claim 8, characterized in that, The driving device (200) is a rotating device; The groove (1221) is annular, and the positioning wire is annular wire, and is used to correspond to the groove (1221).

10. A method for preparing a contact lens, characterized in that, Using the mold as described in any one of claims 1 to 5 or the equipment as described in any one of claims 6 to 9, the preparation method comprises the following steps: The flexible circuit is placed in the groove (1221) of the first punch (120), and the electronic components are connected to the flexible circuit to form an electronic device, thereby obtaining the first punch (120) loaded with the electronic device. The first punch (120) loaded with electronic devices is pressed onto the concave die (110) loaded with film-forming material, and the film-forming material is cured to form a film containing the electronic devices. The mold (100) is then removed to obtain the contact lens.

11. The method for preparing a contact lens as described in claim 10, characterized in that, The step of placing the flexible circuit in the groove (1221) of the first punch (120) includes the following steps: The first punch (120) is moved along the shape trajectory of the groove (1221) with the groove (1221) facing upward; One end of the flexible circuit is placed in the groove (1221), and as the first punch (120) rotates, the other end of the flexible circuit is also placed in the groove (1221).

12. The method for preparing a contact lens as described in claim 11, characterized in that, Before placing one end of the flexible circuit into the groove (1221), the following steps are also included: Positive photoresist is disposed in the groove (1221) to fix the flexible circuit.

13. The method for preparing a contact lens according to any one of claims 10 to 12, characterized in that, After forming a diaphragm containing the electronic device in the concave mold (110), the first punch (120) is removed, and film-forming material is injected onto the diaphragm in the concave mold (110). Then, the second punch (130) is pressed onto the concave mold (110), cured, and the concave mold (110) and the second punch (130) are removed.

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