CN117565439A - Mold for molding contact lens, equipment and preparation method of contact lens - Google Patents

Abstract

The invention relates to a mold, equipment and a preparation method of a contact lens for forming the contact lens. The die comprises: the female die is provided with a forming concave part; and the first male die is provided with a first molding convex part, the first molding convex part is provided with a groove with a closed shape, and the first molding convex part is used for being matched with the molding concave part to form a first molding cavity. The problem of how the flexible circuit is arranged in the contact lens is solved by adopting the mould to prepare the contact lens, and the monitoring sensitivity and wearing comfort of the prepared contact lens are improved.

Description

Mold for molding contact lens, equipment and preparation method of contact lens

Technical Field

The invention relates to the technical field of medical equipment, in particular to a die for forming a contact lens, equipment and a preparation method of the contact lens.

Background

Along with the intelligent development of the contact lens, the display can be realized, and high-sensitivity monitoring of parameters such as tension, pressure, deformation and the like can also be realized.

Taking ocular pressure monitoring as an example, long-range ocular pressure monitoring is a necessary means for early detection of glaucoma, postoperative glaucoma disease control, and drug control of ocular pressure. However, there is no acceptable long-range intraocular pressure monitoring device in the industry, so the long-range intraocular pressure monitoring device with low manufacturing cost, full flexibility and good user experience is a focus of attention in academia and industry competition.

The LC oscillator with variable capacitance and variable inductance is arranged in the contact lens as an intraocular pressure sensor, and the passive characteristic of the LC oscillator is a better implementation way for meeting the low-cost requirement. Among them, the variable inductance type is attracting attention because it does not have problems such as leakage of capacitance. The sensitivity of tonometry is related to the sensitivity of the contact lens to changes in intraocular pressure, and therefore a lower elastic modulus of the contact lens as a whole is required.

At present, the substrate of the contact lens for monitoring intraocular pressure is silicon hydrogel, and the elastic modulus is only 6.5-14 MPa; and then transferring the metal circuit to the substrate by printing, printing and the like, thereby forming the intraocular pressure sensor. While ensuring conductivity, the elastic modulus of the metal circuit formed by the method often reaches GPa level, so that the elastic modulus of the whole contact lens is influenced, and the traditional printing, printing and other modes are not suitable for manufacturing high-sensitivity intraocular pressure contact lenses.

Therefore, how to improve the monitoring sensitivity of parameters such as tension, pressure, deformation, etc. of the contact lens without affecting the elastic modulus of the contact lens is a technical problem to be solved.

Disclosure of Invention

Based on this, it is necessary to provide a mold, an apparatus for molding a contact lens, and a method for producing a contact lens, which can improve the monitoring sensitivity.

The invention is realized by the following technical scheme.

In one aspect of the present invention, there is provided a mold for molding a contact lens, comprising:

the female die is provided with a forming concave part; and

The first male die is provided with a first molding convex part, the first molding convex part is provided with a groove with a closed shape, and the first molding convex part is used for being matched with the molding concave part to form a first molding cavity.

In some embodiments, the width of the groove is 0.2 mm-1 mm;

and/or the depth of the groove is 0.05 mm-1 mm;

and/or the number of the grooves is more than two, wherein at least one groove is arranged on the outer side of the other groove in a surrounding mode;

and/or the groove is annular or polygonal.

In some of these embodiments, the molding concave portion has a molding concave arc surface, and the first molding convex portion has a first molding convex arc surface, and the first molding convex arc surface is capable of being pressed with the molding concave arc surface.

In some of these embodiments, the groove is located on the first shaped convex arc surface, the groove being disposed circumferentially around the first shaped convex arc surface.

In some of these embodiments, the mold further comprises a second punch having a second molding protrusion for mating with the molding recess to form a second molding cavity.

In another aspect of the invention, there is provided an apparatus for molding contact lenses, comprising:

the mould is used for curing and forming the contact lens; and

And the driving device is used for enabling the first male die to move along the shape track of the groove in an upward way before the solidification and molding of the contact lens so as to arrange the flexible circuit in the groove of the first male die.

In some of these embodiments, the apparatus further comprises:

and the unreeling device is used for unreeling the flexible circuit while arranging the flexible circuit in the closed-shape groove of the first male die.

In some of these embodiments, the apparatus further comprises:

the positioning device comprises an electrifying device and a positioning wire;

the positioning wire is arranged below the flexible circuit in the groove and is arranged in parallel and opposite to the flexible circuit in the groove, and the energizing device is used for energizing the positioning wire and the flexible circuit with current in the same direction; or,

the positioning wire is arranged above the flexible circuit in the groove and is arranged in parallel and opposite to the flexible circuit in the groove, and the energizing device is used for energizing the positioning wire and the flexible circuit with currents in opposite directions.

In some of these embodiments, the drive means is a rotary means;

the groove is annular, and the positioning wire is an annular wire and is arranged corresponding to the groove.

In another aspect, the present invention provides a method for preparing a contact lens, using the above mold or the above apparatus, the method comprising the steps of:

placing a flexible circuit in a groove of the first male die, and connecting an electronic element with the flexible circuit to form an electronic device, so as to obtain the first male die loaded with the electronic device;

and pressing the first male die loaded with the electronic device on the female die loaded with the film forming material, solidifying the film forming material to form a film with the electronic device inside, and removing the die to obtain the contact lens.

In some of these embodiments, the step of placing the flexible circuit in the closed-shaped recess of the first punch comprises the steps of:

moving the first male die along the shape track of the groove in a way that the groove faces upwards;

and correspondingly arranging one end of the flexible circuit in the groove, and arranging the other end of the flexible circuit in the groove along with the rotation of the first male die.

In some embodiments, before the end of the flexible circuit is correspondingly placed in the groove, the method further comprises the following steps:

and positive photoresist is arranged in the groove and used for fixing the flexible circuit.

In some embodiments, after the membrane with the electronic device built in is formed in the female die, the first male die is removed, a film forming material is continuously injected on the membrane of the female die, and then a second male die is pressed on the female die, solidified, and the female die and the second male die are removed.

The flexible circuit can be arranged in the groove of the closed shape of the first male die and an electronic device can be formed, then the film is formed by pressing the film forming material through the first male die and the female die and the electronic device is arranged in the film, so that the flexible circuit is not required to be adhered to the film body of the lens by adopting an adhesive method, the problems that the adhesive used by the adhesive is dissolved in the hydration process and is damaged to eyes and the elastic modulus of the adhesive used by the adhesive influences the elastic modulus of the contact lens are avoided, the problems that printing, printing and other modes are not suitable for manufacturing the intraocular pressure contact lens with high sensitivity are solved, the problem that how the flexible circuit is arranged in the contact lens is solved, and the monitoring sensitivity and wearing comfort of the manufactured contact lens are improved.

Drawings

FIG. 1 is a schematic view showing a state of a mold for molding a contact lens according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the female die in the mold shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the first punch in the die shown in FIG. 1;

figure 4 is a bottom view of the first punch of figure 3;

FIG. 5 is a schematic view showing a mold for molding a contact lens according to another embodiment of the present invention;

fig. 6 is a schematic view showing a configuration of a state of an apparatus for molding a contact lens according to an embodiment of the present invention.

Reference numerals illustrate:

100. a mold; 110. a female die; 112. forming a concave part; 120. a first punch; 122. a first molding protrusion; 1221. a groove; 101. a first molding cavity; 201. a flexible circuit; 130. a second male die; 132. a second molding protrusion; 102. a second molding cavity; 200. a driving device; 300. unreeling device.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present 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", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, 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 belongs. The terminology used herein in the description of the 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.

The present inventors have found that high sensitivity monitoring of parameters such as tension, pressure, and deformation of a contact lens requires that the elastic modulus of the substrate and the lead wires in the contact lens be small, and that the sensitivity of sensing changes in parameters such as tension, pressure, and deformation of an eyeball is high.

The main process of the traditional soft contact lens is a mould pressing method, and the processing process is as follows: the liquid raw material is injected into the mold, and the front and rear surfaces of the lens depend on the shape of the mold, and when the raw material is injected into the mold, heat energy is radiated to polymerize the material until the reaction is sufficiently completed. Further, the lens edge can be polished to meet the requirements of the finished product; after edge polishing, the lens is hydrated by immersing in physiological saline or the like.

The flexible conductive circuit (namely the flexible circuit) is integrated into the contact lens, so that the monitoring of parameters such as tension, pressure, deformation and the like can be realized, and even the real-time treatment of diseases can be realized. For this purpose, some techniques adhere the flexible circuit to the lens body by means of gluing. However, the adhesive used for the adhesion has the problem that the adhesive is dissolved during hydration and wearing to damage eyes, and in addition, the elastic modulus of the adhesive also affects the elastic modulus of the contact lens, thereby affecting the monitoring sensitivity and wearing comfort of the contact lens.

Referring to fig. 1, an embodiment of the present invention provides a mold 100 for molding a contact lens, which includes a female mold 110 and a first male mold 120.

Referring to fig. 1 and 2, the female die 110 has a molding recess 112.

Referring to fig. 1 and 3, the first punch 120 has a first molding protrusion 122. The first molding protrusion 122 is provided with a groove 1221 (shown in fig. 4) of a closed shape.

With continued reference to fig. 1, the first molding protrusion 122 is configured to cooperate with the molding recess 112 to form the first molding cavity 101.

The mold 100 described above may be used for contact lens molding, but is not limited thereto. When the mold 100 is used for molding a contact lens, the preparation method of the contact lens comprises the following steps S12 to S14:

step S12, placing the flexible circuit 201 in the groove 1221 of the first male die 120, and connecting an electronic component (not shown) with the flexible circuit 201 to form an electronic device, so as to obtain the first male die 120 loaded with the electronic device;

step S14, pressing the first male mold 120 loaded with the electronic device onto the female mold 110 loaded with the film forming material, curing the film forming material to form a film with the electronic device inside, and removing the mold 100 to obtain the contact lens.

The flexible circuit 201 can be arranged in the groove 1221 of the first male die 120 and an electronic device can be formed by adopting the die 100 to prepare the contact lens, then the film is formed by pressing the film forming material through the first male die 120 and the female die and the electronic device is arranged in the film, so that the flexible circuit 201 is stuck to the film body of the lens without adopting an adhesive method, the problem that the adhesive used by the adhesive is dissolved in the hydration process and is damaged when the contact lens is worn is avoided, the problem that the elastic modulus of the adhesive used by the adhesive influences the elastic modulus of the contact lens is also avoided, the problem that the printing, the printing and other modes are not suitable for manufacturing the high-sensitivity intraocular pressure contact lens is solved, the problem that how the flexible circuit 201 is arranged in the contact lens is solved, and the monitoring sensitivity and the wearing comfort of the prepared contact lens are improved.

Because the flexible circuit 201 is soft and lightweight, the membrane of the contact lens is also very soft, and the membrane material is even in a liquid state during the molding process, how to place the flexible circuit 201 securely in the smart contact lens is an industrial problem. The use of the mold 100 to make contact lenses solves the problem of integrating a flexible circuit 201 with a lower modulus of elasticity into a contact lens, thus integrating a flexible circuit 201 with a lower modulus of elasticity into a membrane body of a contact lens that would otherwise have a lower modulus of elasticity. The flexible circuit 201 with smaller elastic modulus can sense the change sensitivity of the parameters such as the tiny tension, pressure and deformation of the eyeball, so that the change sensitivity of the parameters such as the tension, the pressure and the deformation of the contact lens is improved, the original elastic modulus of the contact lens is hardly influenced, and the low-cost mass production is facilitated.

With continued reference to FIG. 3, in some embodiments, the grooves 1221 have a width of 0.2mm to 1mm. Further, the width of the groove 1221 is set mainly considering the diameter of the flexible wiring 201, for example, the width of the groove 1221 is set to a lower limit of the diameter of the flexible wiring 201 and an upper limit of 1.1 to 1.2 times the diameter of the flexible wiring 201. In some examples, the flexible circuit may be 0.2mm, 0.3mm, 0.4mm, 0.5mm in diameter.

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

Further, 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.

In some of these embodiments, the molding recess 112 has a molding concave cambered surface, and the first molding protrusion 122 has a first molding convex cambered surface, and the first molding convex cambered surface can be pressed with the molding concave cambered surface to form the first molding cavity 101.

Referring to fig. 3 and 4, further, the groove 1221 is located on the first molding convex cambered surface. Further, the grooves 1221 are provided around the circumference of the first molded convex arc surface, which can facilitate the formation of an annular inductor.

Further, in the specific example of fig. 3 and 4, the groove 1221 is annular, for example, circular.

It is appreciated that in other examples, the recess 1221 may also be polygonal, such as rectangular, which may facilitate forming a rectangular inductor. It is understood that the grooves 1221 may be other irregular shapes. Further, the edges of the grooves 1221 may be straight or curved, or may be serrated.

In some embodiments, the grooves 1221 are more than two, wherein at least one groove 1221 is disposed outside of another groove 1221.

Further, each of the other grooves 1221 is layered in sequence to be provided outside one of the grooves 1221. For example, the number of the grooves 1221 is three, and the grooves are a first groove, a second groove and a third groove respectively, the second groove is enclosed on the outer side of the first groove, and the third groove is enclosed on the outer side of the second groove.

In some embodiments, before the end of the flexible circuit 201 is correspondingly disposed in the groove 1221, the following step S11 is further included: a positive photoresist is disposed within the recess 1221 for securing the flexible circuit 201. The positive photoresist is used to temporarily fix the flexible wiring 201, preventing the flexible wiring 201 from being detached from the groove 1221 before the lamination step of step S14. And, since the positive photoresist can be decomposed under the irradiation condition, the positive photoresist can be decomposed under the irradiation curing condition of the film forming material of step S14, and then the positive photoresist can be removed, for example, the positive photoresist can be removed by using a developer. Thus, the flexible circuit 201 or the electronic device has good material adhesion with the film forming material in the female die 110, and the first male die 120 can be well separated from the film forming material of the flexible circuit 201 by curing to form a film with the electronic device inside, so that the flexible circuit 201 or the electronic device is fixed in the film formed by curing the film forming material.

Referring to fig. 5, in some of these embodiments, the mold 100 further includes a second punch 130. The second punch 130 has a second molding protrusion 132, the second molding protrusion 132 for mating with the molding recess 112 to form the second molding cavity 102. Accordingly, the second molding convex portion 132 has a second molding convex arc surface, and the second molding convex arc surface can be pressed with the molding concave arc surface of the molding concave portion 112 to form the second molding cavity 102.

In order to make the flexible circuit 201 or the electronic device better covered by the film forming material, after the film with the electronic device is formed in the female die 110, the first male die 120 is removed, and the film forming material is continuously injected on the film of the female die 110, and is pressed with the female die 110 by adopting the second male die 130, so that a film is continuously formed on the film with the electronic device, and then the contact lens is manufactured.

Namely: the preparation method of the contact lens further comprises the following step S16:

after the membrane with the electronic device built in is formed in the female die 110, the first male die 120 is removed, the membrane forming material is continuously injected on the membrane of the female die 110, the second male die 130 is pressed on the female die 110, and the female die 110 and the second male die 130 are removed after solidification.

Further, after the first punch 120 is removed in step S16, and before the step of continuously injecting the film forming material onto the film of the die 110, the method further comprises the steps of: the photoresist residue reactant of the positive photoresist on the surface of the membrane in the female die 110 after photo-curing is removed. For example, a developer may be used to clean the surface of the membrane within the female mold 110 to remove the positive photoresist.

It can be appreciated that after step S16, it may further include: hydration, disinfection, packaging and other treatment steps of the contact lens.

Referring to fig. 6, an apparatus for molding a contact lens according to an embodiment of the present invention includes a mold 100 and a driving device 200 as described above.

The mold 100 described above is used for curing and molding contact lenses.

The driving device 200 is used for moving the first male mold 120 along the shape locus of the groove 1221 in such a manner that the groove 1221 faces upward, before curing and molding of the contact lens, so as to arrange the flexible line 201 in the groove 1221 of the first male mold 120.

In the specific example of fig. 6, for example, the groove 1221 is an annular groove, and the control driving device 200 drives the first punch 120 to move along the annular track in such a manner that the groove 1221 faces upward. Further, the driving device 200 is a rotating device.

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

Further, by the control of the driving device 200, it is achieved that the flexible line 201 is arranged in the groove 1221 of the first punch 120 and forms a spiral inductor.

Thus, in step S12 of the above-mentioned contact lens manufacturing method, placing the flexible circuit 201 in the groove 1221 of the first male mold 120 includes the following steps S121 to S122:

step S121, the first punch 120 is moved along the shape locus of the groove 1221 in such a manner that the groove is directed upward.

In step S122, one end of the flexible circuit 201 is correspondingly placed in the groove 1221, and the other end of the flexible circuit 201 is also placed in the groove 1221 along with the rotation of the first punch 120.

Because the flexible circuit 201 is soft and lightweight, the membrane of the contact lens is also very soft, and the membrane material is even in a liquid state during the molding process, how to place the flexible circuit 201 securely in the smart contact lens is an industrial problem. On the basis of arranging the groove 1221 on the first male die 120, the invention further adopts the driving device 200 to enable the first male die 120 to move along the shape track of the groove in a way that the groove 1221 faces upwards, and gradually places the flexible circuit 201 into the groove 1221 along with the rotation of the first male die 120, thereby skillfully solving the problem of fixing and placing the flexible circuit 201. Further, by providing the positive photoresist described above within the groove 1221, temporary fixation of the flexible wiring 201 in the groove 1221 can be facilitated.

Further, in step S121 and step 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 further comprises a motor, and the motor is connected with the turntable and is used for driving the turntable to rotate.

In some of these embodiments, the apparatus further comprises an unwind device 300. The unreeling device 300 is used for unreeling the flexible line 201 while the flexible line 201 is disposed in the groove 1221 of the first male die 120. In this manner, the length and unwinding speed of flexible circuit 201 can be precisely controlled by unwinding device 300. After the flexible circuit 201 is placed in the recess 1221 of the first punch 120, the electronic component may be connected to the flexible circuit 201 to form an electronic device, resulting in the first punch 120 loaded with the electronic device.

For example, in a specific example, the electronic device is an LC oscillator. The electronic components are capacitive elements that together with the inductor formed by the flexible line 201 form an LC oscillator. After the flexible wiring 201 is placed in the groove 1221 of the first punch 120, a capacitive element pickup of a microminiature is picked up, placed at both ends of the above flexible wiring 201, and soldering of the flexible wiring 201 and the capacitive element is performed.

In some of these embodiments, the apparatus further comprises positioning means (not shown). The positioning device comprises an energizing device and a positioning wire. Further, the positioning wire is arranged below the flexible circuit in the groove 1221 and is arranged opposite to the flexible circuit 201 in the groove 1221 in parallel, and the energizing device is used for supplying current in the same direction to the positioning wire and the flexible circuit 201. In this way, the positioning wires and the flexible circuit 201 are supplied with current in the same direction, so that the parallel and opposite positioning wires and the flexible circuit 201 generate attractive force, and the flexible circuit 201 can be well positioned in the groove 1221 in the rotating state of the first male die 120, so that the alignment accuracy is improved.

Specifically, the positioning wire may be located in the driving device 200, above or below the driving device 200, or even embedded in the first punch 120. So long as the positioning wires are secured for placement under the flex circuit within the recess 1221.

In another example, the positioning wire is used to be disposed above the flexible circuit in the groove 1221 and disposed parallel and opposite to the flexible circuit 201 in the groove 1221, and the energizing means is used to energize the positioning wire and the flexible circuit 201 in opposite directions. In this way, currents in opposite directions are introduced into the positioning wires and the flexible circuit 201, so that mutually repulsive acting forces are generated between the positioning wires and the flexible circuit 201 which are arranged in parallel and opposite to each other, and the flexible circuit 201 can be further promoted to be well positioned in the groove 1221 in the rotating state of the first male die 120, so that the alignment accuracy is improved.

It will be appreciated that the positioning wires are only required to be disposed above the flexible circuit within the recess 1221.

Further, the positioning wires may be disposed corresponding to the grooves 1221. For example, the groove 1221 is annular, and the positioning wire is an annular wire. For another example, the recess 1211 is polygonal, such as rectangular, and the positioning wire is polygonal, such as rectangular.

In a specific example, a method of preparing a contact lens includes the steps of:

first, a positive photoresist is coated in the groove 1221 of the first punch 120 to temporarily fix the flexible wiring 201 gradually put in; the flexible circuit 201 is automatically discharged from top to bottom at a uniform speed by adopting the unreeling device 300, the discharging length and the discharging speed are precisely controlled, and the position after discharging is aligned to the groove 1221 of the first male die 120; meanwhile, the first male die 120 is driven to rotate by the driving device 200, so that the flexible circuit 201 is ensured to uniformly fall in the whole groove 1221 at all times; finally, after the flexible circuit 201 with the required length is arranged in the groove 1221, the driving device 200 and the unreeling device 300 stop working, pick-up electronic components are placed at two ends of the flexible circuit 201, and the flexible circuit 201 and the electronic components are welded.

An embodiment of the present invention provides a contact lens, which includes a membrane body and an electronic device disposed in the membrane body, wherein a flexible circuit 201 is used as a circuit of the electronic device, and an elastic modulus of the flexible circuit 201 is smaller than an elastic modulus of the membrane body.

Based on the above-described mold 100 and apparatus for molding a contact lens, the present invention enables the flexible circuit 201 having a modulus of elasticity smaller than that of the membrane body to be integrated into the contact lens, thereby obtaining the above-described contact lens.

In some embodiments, the contact lens comprises a first membrane and a second membrane, wherein the electronic device is wholly or partially arranged in the first membrane, and the second membrane is attached to the first membrane to completely cover the electronic device. It will be appreciated that the film forming materials of the first and second films may be the same or different.

In some of these embodiments, the membrane body does not contain an adhesive.

In some embodiments, the membrane body is made of a flexible material. Further, the elastic modulus of the membrane body is 6.5-14 Mpa. In a specific example, the material of the membrane body is silica gel.

In some of these embodiments, the modulus of elasticity of the flexible circuit 201 is no greater than 10Mpa. Further, the flexible circuit 201 is made of silica gel of liquid metal, wherein the liquid metal may be gallium indium alloy.

In some of these embodiments, the electronic device is an LC oscillator.

It is understood that the contact lens may be an intraocular pressure monitoring contact lens.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. The scope of the invention is therefore intended to be covered by the appended claims, and the description and drawings may be interpreted in accordance with the contents of the claims.

Claims (13)

1. A mold for molding contact lenses, comprising:

a die (110) having a molding concave portion (112); and

-a first male die (120) having a first forming protrusion (122), said first forming protrusion (122) being provided with a recess (1221) of closed shape, said first forming protrusion (122) being adapted to cooperate with said forming recess (112) to form a first forming cavity (101).

2. The mould according to claim 1, characterized in that the width of the groove (1221) is 0.2mm to 1mm;

and/or the depth of the groove (1221) is 0.05 mm-1 mm;

and/or, the number of the grooves (1221) is more than two, wherein at least one groove (1221) is arranged on the outer side of the other groove (1221) in a surrounding manner;

and/or the groove (1221) is annular or polygonal.

3. The mold according to any one of claims 1 to 2, wherein the molding recess (112) has a molding concave arc surface, and the first molding protrusion (122) has a first molding convex arc surface, and the first molding convex arc surface is capable of being pressed with the molding concave arc surface.

4. A mould according to claim 3, wherein the groove (1221) is located on the first profiled convex cambered surface, the groove (1221) being arranged circumferentially around the first profiled convex cambered surface.

5. The mould according to any one of claims 1 to 2, 4, further comprising a second punch (130), the second punch (130) having a second shaped protrusion (132), the second shaped protrusion (132) being adapted to cooperate with the shaped recess (112) to form a second shaped cavity (102).

6. An apparatus for molding contact lenses, comprising:

the mold (100) of any of claims 1 to 5, for curing molding of a contact lens; and

And the driving device (200) is used for enabling the first male die (120) to move along the shape track of the groove (1221) in a mode that the groove (1221) faces upwards before curing and forming of the contact lens so as to arrange a flexible circuit in the groove (1221) of the first male die (120).

7. The apparatus of claim 6, wherein the apparatus further comprises:

-an unreeling device (300), the unreeling device (300) being used for unreeling the flexible line while arranging the flexible line in the groove (1221) of the first male die (120).

8. The apparatus according to claim 6 or 7, wherein the apparatus further comprises:

the positioning device comprises an electrifying device and a positioning wire;

the positioning wire is arranged below the flexible circuit in the groove (1221) and is arranged in parallel and opposite to the flexible circuit in the groove (1221), and the energizing device is used for energizing the positioning wire and the flexible circuit with current in the same direction; or,

the positioning wire is arranged above the flexible circuit in the groove (1221) and is arranged in parallel and opposite to the flexible circuit in the groove (1221), and the energizing device is used for energizing the positioning wire and the flexible circuit with currents in opposite directions.

9. The apparatus according to claim 8, wherein the driving means (200) is a rotating means;

the groove (1221) is annular, and the positioning wire is an annular wire and is arranged corresponding to the groove (1221).

10. A method of producing a contact lens, characterized in that a mold according to any one of claims 1 to 5 or an apparatus according to any one of claims 6 to 9 is used, the method comprising the steps of:

placing a flexible circuit in a groove (1221) of the first male die (120), and connecting an electronic element with the flexible circuit to form an electronic device, so as to obtain the first male die (120) loaded with the electronic device;

and pressing the first male die (120) loaded with the electronic device on the female die (110) loaded with the film forming material, curing the film forming material to form a film with the electronic device inside, and removing the die (100) to obtain the contact lens.

11. A method of preparing a contact lens according to claim 10, wherein said step of placing a flexible circuit in a recess (1221) of said first male mold (120) comprises the steps of:

-moving the first punch (120) along the shape trajectory of the recess (1221) in such a way that the recess (1221) faces upwards;

one end of the flexible circuit is correspondingly arranged in the groove (1221), and the other end of the flexible circuit is also arranged in the groove (1221) along with the rotation of the first male die (120).

12. The method of preparing a contact lens according to claim 11, further comprising the step of, prior to placing one end of the flexible circuit in the recess (1221), correspondingly:

a positive photoresist is disposed within the recess (1221) for securing the flex circuit.

13. The method of manufacturing a contact lens according to any one of claims 10 to 12, wherein after forming a membrane with the electronic device built-in the female mold (110), the first male mold (120) is removed, and a film forming material is continuously injected onto the membrane of the female mold (110), and then a second male mold (130) is pressed onto the female mold (110), cured, and the female mold (110) and the second male mold (130) are removed.