Production process of a ring-shaped wearable and smart ring

Abstract

The application discloses a production process of a ring-shaped wearable and an intelligent ring, and the production process comprises the following steps: providing a ring-shaped element and a mold, and placing the ring-shaped element in a cavity; injecting supercritical carbon dioxide for replacement into a ring-shaped cavity and a compensation cavity; mixing a previously prepared plastic material with supercritical carbon dioxide for mixing to form a low-viscosity plastic mixture; injecting the low-viscosity plastic mixture into the ring-shaped cavity and the compensation cavity, and keeping the pressure higher than the critical pressure of the supercritical carbon dioxide during the injection process; controlling the temperature and the pressure, so that the supercritical carbon dioxide is gradually separated from the low-viscosity plastic mixture, and meanwhile, the plastic material in the low-viscosity plastic mixture is gradually deposited in the ring-shaped cavity and solidified to form a shape; after the plastic material in the ring-shaped cavity is completely solidified, the ring-shaped element is taken out of the mold, cooled to room temperature, and subjected to packaging treatment. The technical scheme of the application can avoid the existence of bubbles in the solidified plastic material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of production of ring-shaped wearable products, and in particular to a production process of a ring-shaped wearable product and an intelligent ring. BACKGROUND

[0002] With the rapid development of wearable technology, smart devices are gradually evolving towards miniaturization, portability and multifunctionality. Under this trend, ring-shaped wearable products such as smart rings, earrings and bracelets have emerged, which combine the beauty of traditional accessories with advanced electronic technology to provide users with health monitoring, identity verification and other functions. To achieve these functions, various electronic components such as optical sensors, processors and batteries need to be integrated into the inner cavity of the wearable product.

[0003] In order to protect these delicate electronic components and ensure the normal operation of the wearable product, it is necessary to fill the inner cavity of the product with a material in a plastic state. After the plastic state material is solidified and formed, it can effectively connect the outer shell of the product and the electronic components together, achieving the protection functions of fixing electronic components, waterproofing, dustproofing and shockproofing. However, traditional filling methods face many challenges. During the injection and solidification of the plastic material, air bubbles often form inside, which not only affects the appearance of the product, but also may reduce its waterproof performance and structural strength. Due to the complex internal structure of ring-shaped wearable devices, traditional methods cannot ensure that the plastic material is evenly distributed in all spaces, especially in some small corners and gaps. In addition, some plastic materials may shrink during the solidification process, resulting in incomplete filling or internal stress. These problems seriously affect the production quality and yield of ring-shaped wearable devices, and a new production process is urgently needed to solve them. SUMMARY

[0004] The main purpose of the present application is to solve the technical problems of existing ring-shaped wearable product production processes, such as air bubbles in the plastic material and the inability of the material to effectively fill the internal space of the ring-shaped wearable product.

[0005] The present application provides a production process of a ring-shaped wearable product, which comprises:

[0006] S1, providing a ring-shaped element and a mold, wherein the ring-shaped element forms a ring-shaped cavity inside, the ring-shaped element is provided with an injection port communicating with the ring-shaped cavity, the mold is provided with a cavity matching the ring-shaped element, and a compensation cavity communicating with the cavity;

[0007] S2, placing the ring-shaped element in the cavity, wherein the outer wall surface of the ring-shaped element is in close contact with the inner wall surface of the cavity, and the ring-shaped cavity communicates with the compensation cavity through the injection port;

[0008] S3, injecting supercritical carbon dioxide into the annular cavity and the compensation cavity to replace all air in the annular cavity and the compensation cavity;

[0009] S4, mixing the pre-prepared plastic material with supercritical carbon dioxide for mixing to form a low-viscosity plastic mixture; injecting the low-viscosity plastic mixture into the annular cavity and the compensation cavity, and maintaining the pressure higher than the critical pressure of supercritical carbon dioxide during the injection;

[0010] S5, controlling the temperature and the pressure to gradually precipitate supercritical carbon dioxide from the low-viscosity plastic mixture, and gradually deposit and solidify the plastic material in the low-viscosity plastic mixture in the annular cavity; in this process, the low-viscosity plastic mixture in the compensation cavity is used to compensate for the part of the low-viscosity plastic mixture in the annular cavity that is reduced due to the precipitation of supercritical carbon dioxide;

[0011] S6, after the plastic material in the annular cavity is completely solidified, taking out the annular element from the mold, cooling to room temperature, and performing packaging treatment.

[0012] Optionally, the annular element comprises oppositely arranged outer annular wall and inner annular wall, and the injection port is formed between the outer annular wall and the inner annular wall;

[0013] The mold comprises oppositely arranged annular outer side wall and annular inner side wall, and the compensation cavity and the fluid passage communicating with the compensation cavity are formed between the annular outer side wall and the annular inner side wall;

[0014] The distance between the annular outer side wall and the annular inner side wall is smaller than the distance between the outer annular wall and the inner annular wall; wherein,

[0015] After the annular element is placed in the cavity, the inner wall surface of the annular outer side wall and the inner wall surface of the annular inner side wall are located between the outer annular wall and the inner annular wall, and the low-viscosity plastic mixture flows into the compensation cavity through the fluid passage and flows to the annular cavity under the guidance of the inner wall surface of the annular outer side wall or the inner wall surface of the annular inner side wall.

[0016] Optionally, the outer annular wall is provided with an outer annular abutting wall, and the inner annular wall is provided with an inner annular abutting wall; wherein,

[0017] After the annular element is placed in the cavity, the annular outer side wall is moved and the end thereof abuts against the outer annular abutting wall, and the annular inner side wall is moved and the end thereof abuts against the inner annular abutting wall.

[0018] Optionally, the S3 comprises:

[0019] S3.1, placing the mold containing the annular element into a high-pressure reactor, the high-pressure reactor comprising an inlet valve and an exhaust valve;

[0020] S3.2, sealing the high-pressure reactor and adjusting the internal temperature of the high-pressure reactor to 35-40°C;

[0021] S3.3, opening the exhaust valve and injecting supercritical carbon dioxide for displacement into the high-pressure reactor through the inlet valve, with an initial injection pressure of 80-100 bar;

[0022] S3.4, after continuously injecting supercritical carbon dioxide for displacement for 15-20 minutes, closing the exhaust valve and the inlet valve and maintaining the pressure of the high-pressure reactor.

[0023] Optionally, the S4 comprises:

[0024] S4.1, mixing the pre-prepared plastic material with supercritical carbon dioxide for mixing in a high-pressure mixer for 5-10 minutes to form a low-viscosity plastic mixture;

[0025] S4.2, controlling the temperature of the high-pressure mixer at 40-50°C and maintaining the pressure at 100-120 bar;

[0026] S4.3, opening the injection valve connected to the mold on the high-pressure reactor and injecting the low-viscosity plastic mixture into the annular cavity and the compensation cavity, with an injection rate controlled at 0.1-0.5 ml / s;

[0027] S4.4, maintaining the pressure in the annular cavity and the compensation cavity at 110-130 bar during the injection process;

[0028] S4.5, after completing the injection, closing the injection valve to ensure that the low-viscosity plastic mixture fills the annular cavity and the compensation cavity.

[0029] Optionally, the S5 comprises:

[0030] S5.1, controlling the temperature of the high-pressure reactor at 45-55°C for 30 minutes;

[0031] S5.2, slowly reducing the pressure in the high-pressure reactor at a rate of 0.5-1 bar / min to gradually precipitate supercritical carbon dioxide from the low-viscosity plastic mixture;

[0032] S5.3, gradually increasing the temperature of the high-pressure reactor to 60-70°C at a rate of 0.5°C / min and maintaining it for 60 minutes;

[0033] S5.4, continue to reduce the pressure in the high-pressure reactor at a rate of 0.3-0.5 bar / min;

[0034] S5.5, increase the temperature of the high-pressure reactor to 70-80℃ and maintain for 90 minutes;

[0035] S5.6, slowly reduce the pressure in the high-pressure reactor to atmospheric pressure at a rate of 0.1-0.2 bar / min;

[0036] S5.7, monitor the pressure change in the annular cavity through the pressure sensor arranged in the high-pressure reactor, ensure that the low-viscosity plastic-like mixture in the compensation cavity can flow into the annular cavity naturally to make up for the volume reduction caused by the precipitation of supercritical carbon dioxide, until the plastic-like material in the annular cavity is completely solidified.

[0037] The second aspect of the present application provides an intelligent ring, comprising:

[0038] an annular element comprising an outer annular shell, an inner annular shell, a bezel and a bezel cover, the outer annular shell and the inner annular shell are oppositely arranged, the bottom periphery of the outer annular shell is connected with the bottom periphery of the inner annular shell, the top periphery of the outer annular shell is connected with the bezel, the outer annular shell, the inner annular shell and the bezel jointly define an annular cavity, an injection port in communication with the annular cavity is formed between the top periphery of the bezel and the inner annular shell, and the bezel cover covers the injection port;

[0039] an electronic element arranged in the annular cavity;

[0040] a filler formed by solidification of a plastic-like material, the filler fills the annular cavity.

[0041] Optionally, the material of the inner annular shell is plastic or titanium; and / or,

[0042] the material of the outer annular shell is at least one of titanium, gold, K gold, silver or jade; and / or,

[0043] the material of the bezel is at least one of titanium, gold, K gold, silver or jade; and / or,

[0044] the material of the bezel cover is at least one of titanium, gold, K gold, silver or jade.

[0045] Optionally, the electronic element comprises a circuit board and a battery;

[0046] the circuit board is electrically connected with the battery;

[0047] The circuit board and the battery are arranged in two positions spaced 180 degrees along the circumference in the annular cavity respectively, so that the weight of the smart ring is evenly distributed.

[0048] Optionally, the inner annular shell is provided with a charging interface, and the electronic components include a charging component arranged in the annular cavity and electrically connected with the battery and the circuit board respectively, and the charging component is exposed through the charging interface.

[0049] The technical scheme provided by the embodiment has at least the following advantages:

[0050] Firstly, the process effectively replaces all air by injecting supercritical carbon dioxide for replacement into the annular cavity and the compensation cavity, thereby avoiding the formation of air bubbles from the source. Supercritical carbon dioxide has the characteristics of low viscosity like a gas and high density like a liquid, and can penetrate every tiny space in the annular cavity, ensuring complete air exclusion. Secondly, the pre-prepared plastic material is mixed with supercritical carbon dioxide for mixing to form a low-viscosity plastic mixture, which significantly reduces the viscosity of the material and improves its flowability. This low-viscosity mixture can uniformly fill every corner of the annular cavity during injection, solving the problem of uneven filling in traditional methods. At the same time, the pressure during injection is maintained to be higher than the critical pressure of supercritical carbon dioxide, further ensuring uniform distribution of the material and effective suppression of air bubbles.

[0051] The process of the present application realizes slow precipitation of supercritical carbon dioxide and gradual deposition and solidification of the plastic material by precisely controlling temperature and pressure. Although the final solidification temperature of the plastic material is similar to that of traditional methods, the present application significantly improves the solidification process by slow heating and precise pressure control. This gradual temperature control helps to reduce thermal shock and reduces the risk of damage to electronic components. In particular, the present application ingeniously designs the structure of the compensation cavity, which uses the natural flow of the low-viscosity plastic mixture in the compensation cavity to timely supplement the part of the mixture in the annular cavity that is reduced due to the precipitation of supercritical carbon dioxide. This design effectively solves the problem of incomplete filling caused by material shrinkage, ensuring the accuracy and integrity of the formed product. In addition, the use of supercritical carbon dioxide improves the thermal conductivity of the material, which helps to more evenly distribute heat during the solidification process and reduces local overheating. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the drawings shown.

[0053] Figure 1 Flow chart for the production process of the annular wearable of the present application;

[0054] Figure 2 Sectional view of an embodiment of the smart ring of the present application.

[0055] Brief description of the drawings:

[0056] 1, annular element; 11, outer annular shell; 12, inner annular shell; 121, charging interface; 122, inner annular wall; 123, inner annular abutment wall; 13, face ring; 131, outer annular wall; 132, outer annular abutment wall; 14, face cover; 15, annular cavity; 16, injection port; 2, electronic element; 21, circuit board; 22, battery; 23, charging component; 3, filler.

[0057] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0059] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0060] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three solutions, taking A and / or B as an example, including A technical solution, B technical solution, and A and B simultaneously meet the technical solution; in addition, the technical solutions of each embodiment can be combined with each other, and must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

[0061] An embodiment of the present application provides a production process of an annular wearable. Figure 1A flow chart of a production process of the ring-shaped wearable provided by an embodiment of the present application.

[0062] Please refer to Figure 1 , S1, provides a ring-shaped element 1 and a mold, wherein the ring-shaped element 1 is formed with a ring-shaped cavity 15, the ring-shaped element 1 is provided with an injection port 16 communicating with the ring-shaped cavity 15, the mold is provided with a cavity matching the ring-shaped element 1, and a compensation cavity communicating with the cavity.

[0063] Specifically, in the present embodiment, the ring-shaped element 1 includes an outer ring-shaped shell 11, an inner ring-shaped shell 12, and a face ring 13. The outer ring-shaped shell 11 and the inner ring-shaped shell 12 can be made of different materials. For example, the outer ring-shaped shell 11 can be made of titanium, gold, K gold, silver, jade, etc. These materials not only have good strength and durability, but also meet the aesthetic needs of the wearer. The inner ring-shaped shell 12 is usually made of plastic material, because plastic has good processing performance and electrical insulation, which is conducive to the installation and protection of electronic components 2. In addition, the inner ring-shaped shell 12 can also be made of titanium metal material, which is insulated by process technology, and has the advantages of hardness and not easy to deform for supporting the filler 3. The outer ring-shaped shell 11 and the inner ring-shaped shell 12 form a ring-shaped cavity 15 for accommodating electronic components 2. The electronic components 2 include but are not limited to optical sensors, circuit boards 21, charging components 23, and batteries 22, etc. Among them, the optical sensor is a key component to realize health monitoring function, and is usually installed at a position close to the inner ring-shaped shell 12. In order to ensure that the optical sensor can accurately detect the physiological signals of the wearer, a light-transmitting window corresponding to the position of the optical sensor needs to be provided on the inner ring-shaped shell 12. The light-transmitting window is usually made of transparent material, such as optical-grade plastic or glass, to ensure that the optical signal can pass through without obstacles. In the actual manufacturing process, the inner ring-shaped shell 12 can be first made into a basic shape by injection molding, then a light-transmitting window is opened at the corresponding position, and finally the transparent material is fixed at the window position.

[0064] The assembly of the ring-shaped element 1 requires precise process, please refer to Figure 2 for understanding. Specifically, first, the circuit board 21, the charging component 23, and the battery 22 are wound inside the inner ring-shaped shell 12, then the circuit board 21 and the battery 22 are fixed in the cavity of the inner ring-shaped shell 12 by winding an insulating adhesive tape around them, then the bottom periphery of the inner ring-shaped shell 12 and the bottom periphery of the outer ring-shaped shell 11 are bonded and fixed by glue, and finally the top periphery of the outer ring-shaped shell 11 and the face ring 13 are fixed together by interference fit, and appropriate amount of sealant is added to strengthen the fixation. The face ring 13 and the top periphery of the inner ring-shaped shell 12 form the above-mentioned injection port 16.

[0065] The mold is mainly composed of two core parts, the male mold and the female mold, which precisely fit to form the key structure for molding the annular wearable element.

[0066] The main body of the male mold includes an inner arc wall corresponding to the outer surface of the outer annular shell 11, which accurately replicates the outer profile of the outer annular shell 11. At the top of the inner arc wall, the male mold extends upward to form an outer barrier wall. This outer barrier wall is a vertical structure. The male mold is made of high-strength tool steel, such as H13 or P20 steel, which has excellent heat resistance and wear resistance, and can maintain stable size and shape in a high-temperature and high-pressure injection environment. The female mold contains an outer arc wall corresponding to the inner surface of the inner annular shell 12, which accurately matches the inner profile of the inner annular shell 12. Similar to the male mold, the female mold also extends upward at the top of the outer arc wall to form an inner barrier wall. The inner barrier wall is also a vertical structure, opposite to the outer barrier wall of the male mold. The material selection of the female mold is the same as that of the male mold, also using high-quality tool steel to ensure stability and durability during injection molding.

[0067] When the male mold and the female mold are closed, the two arc walls (inner arc wall and outer arc wall) precisely butt joint to form an annular cavity. This cavity precisely wraps around the annular element 1. The space between the outer barrier wall of the male mold and the inner barrier wall of the female mold forms a compensation cavity that communicates with the injection port 16. The design of the compensation cavity allows additional material to flow into the annular cavity 15 during injection and solidification to compensate for the volume shrinkage caused by the precipitation of supercritical carbon dioxide. The volume of the compensation cavity is usually designed to be 5% to 15% of the volume of the annular cavity 15, which is accurately calculated according to the properties of the plastic material (epoxy resin) used and the amount of supercritical carbon dioxide used.

[0068] The height and spacing of the outer barrier wall and the inner barrier wall need to be carefully designed to ensure that the volume of the compensation cavity is appropriate and can effectively guide the flow of material. The surfaces of the two barrier walls need to be precisely machined and treated to reduce the frictional resistance of the material during flow. Usually, the surfaces of the barrier walls (outer barrier wall and inner barrier wall) are mirror polished.

[0069] Please continue to refer to Figure 1 , S2, placing the annular element 1 in the cavity, wherein the outer wall surface of the annular element 1 fits the inner wall surface of the cavity, and the annular cavity 15 communicates with the compensation cavity through the injection port 16;

[0070] In one embodiment of the present application, the annular element 1 includes oppositely arranged outer annular wall 131 and inner annular wall 122, and the injection port 16 is formed between the outer annular wall 131 and the inner annular wall 122;

[0071] The mold comprises oppositely arranged annular outer side wall and annular inner side wall, the annular outer side wall and the annular inner side wall form the compensation cavity and the fluid passage communicating with the compensation cavity;

[0072] The spacing between the annular outer side wall and the annular inner side wall is less than the spacing between the outer annular wall 131 and the inner annular wall 122; wherein,

[0073] After the annular element 1 is placed in the cavity, the inner wall surface of the annular outer side wall and the inner wall surface of the annular inner side wall are located between the outer annular wall 131 and the inner annular wall 122, the low-viscosity plastic mixture flows into the compensation cavity through the fluid passage, and flows into the annular cavity 15 under the guidance of the inner wall surface of the annular outer side wall or the inner wall surface of the annular inner side wall.

[0074] Specifically, please refer to Figure 2 , the outer annular wall 131 is actually the side wall of the faceplate 13 facing the inner annular shell 12, and the inner annular wall 122 is the top periphery of the inner annular shell 12.

[0075] The annular outer side wall is formed by the structure of the outer barrier wall as described above, and the annular inner side wall is formed by the structure of the inner barrier wall as described above.

[0076] The spacing between the annular outer side wall and the annular inner side wall of the mold is designed to be less than the spacing between the outer annular wall 131 and the inner annular wall 122 of the annular element 1, which has the following advantages: it ensures that during injection molding, the material is prevented from flowing onto the top of the faceplate 13 and the top of the inner annular shell 12. It helps to control the direction and speed of material flow. For example, for an injection port 16 with a spacing of 3mm, the corresponding spacing in the mold can be designed to be 2.8mm, which is a difference of 0.2mm, but it plays a key role in controlling the flow of material.

[0077] In actual injection molding, the low-viscosity plastic mixture first flows into the compensation cavity through the fluid passage. Then, under the guidance of the inner wall surface of the annular outer side wall or the inner wall surface of the annular inner side wall, the material further flows into the annular cavity 15. This guided flow design effectively prevents material turbulence and reduces bubble formation. For example, by designing micron-level flow guide lines on the mold wall, the material flow path can be further optimized. The depth of these lines is usually between 10 and 50 microns, and the width is between 50 and 200 microns.

[0078] In an embodiment of the present application, the outer annular wall 131 is provided with an outer annular abutting wall 132, and the inner annular wall 122 is provided with an inner annular abutting wall 123; wherein,

[0079] After the ring-shaped element 1 is placed in the cavity, the outer ring-shaped wall is moved and its end portion is in abutment with the outer ring-shaped abutment wall 132, and the inner ring-shaped wall is moved and its end portion is in abutment with the inner ring-shaped abutment wall 123.

[0080] Specifically, the outer barrier wall and the inner barrier wall in the mold each include two key parts: a fixed part and a moving part. The moving part of the outer barrier wall is the outer ring-shaped wall, and the moving part of the inner barrier wall is the inner ring-shaped wall. The core purpose of this design is to achieve precise sealing and positioning during injection molding.

[0081] The outer ring-shaped wall 131 on the ring-shaped element 1 is provided with an outer ring-shaped abutment wall 132, and the inner ring-shaped wall 122 is provided with an inner ring-shaped abutment wall 123. After the ring-shaped element 1 is placed in the cavity, the outer ring-shaped wall (i.e. the moving part of the outer barrier wall) is moved up and down until its end portion is in close abutment with the outer ring-shaped abutment wall 132. Similarly, the inner ring-shaped wall (i.e. the moving part of the inner barrier wall) is also moved up and down until it is in precise contact with the inner ring-shaped abutment wall 123. This double abutment mechanism creates a highly sealed injection molding environment.

[0082] The main purpose of this design is to prevent plastic material from seeping into the tiny gap between the outer wall of the ring-shaped element 1 and the inner wall of the cavity during injection. Without this sealing mechanism, even a 0.01 mm gap can cause material to leak, affecting the accuracy and appearance quality of the product. Through the precise abutment of the outer ring-shaped wall and the inner ring-shaped wall, a nearly perfect sealing environment is created, ensuring that the injected material can only flow along the predetermined path and fill the designated ring-shaped cavity 15.

[0083] Please continue to refer to Figure 1 , S3, injecting supercritical carbon dioxide for displacement into the ring-shaped cavity 15 and the compensation cavity to displace all air in the ring-shaped cavity 15 and the compensation cavity;

[0084] In an embodiment of the present application, the S3 comprises:

[0085] S3.1, placing the mold containing the ring-shaped element 1 in a high-pressure reaction kettle, the high-pressure reaction kettle comprising an inlet valve and an exhaust valve;

[0086] S3.2, sealing the high-pressure reaction kettle and adjusting the internal temperature of the high-pressure reaction kettle to 35-40°C;

[0087] S3.3, opening the exhaust valve and injecting supercritical carbon dioxide for displacement into the high-pressure reaction kettle through the inlet valve, with an initial injection pressure of 80-100 bar;

[0088] S3.4, after 15-20 minutes of continuous injection of the supercritical carbon dioxide for displacement, the exhaust valve and the inlet valve are closed, maintaining the pressure of the autoclave.

[0089] In particular, first of all, the mould containing the annular element 1 is carefully placed inside the autoclave. This autoclave is a specially designed apparatus, usually made of high-strength alloy steel, able to withstand pressures up to 200 bar. The autoclave is equipped with an inlet valve and an exhaust valve, both of which play a fundamental role throughout the process. The inlet valve is used to control the injection of supercritical carbon dioxide, while the exhaust valve is used to evacuate the air inside the autoclave and to control the internal pressure.

[0090] Once the mould has been placed, the next step is to seal the autoclave. Usually, the sealing of the autoclave is carried out with high-performance O-rings or metal gaskets, which are able to maintain a good sealing performance even in high pressure and high temperature environments. Once the sealing is complete, the internal temperature of the autoclave is adjusted. The temperature is adjusted to a range of 35-40°C, a value that has been carefully calculated because it is slightly higher than the critical temperature of carbon dioxide (31.1°C), favouring the maintenance of the supercritical state of carbon dioxide. The temperature control is usually achieved through external heating elements applied to the outer wall of the autoclave or through internal heating elements built into the autoclave, while multiple temperature sensors are used to ensure the uniformity of the temperature inside the entire autoclave.

[0091] When the temperature reaches the set range, the exhaust valve is opened, this step is aimed at creating a flow path for the supercritical carbon dioxide that will be injected shortly. Then, the injection of supercritical carbon dioxide for displacement begins through the inlet valve. The initial injection pressure is set at 80-100 bar, a pressure range that is much higher than the critical pressure of carbon dioxide (73.8 bar), ensuring that carbon dioxide always remains in a supercritical state. The precise control of the pressure is usually achieved through high-precision pressure sensors and electronic control valves. For example, for a 50-litre autoclave, the initial injection rate can be set at 2-3 litres per minute (volume at standard conditions), a rate that ensures a rapid displacement without causing a sudden temperature change in the autoclave due to too fast injection.

[0092] The injection of supercritical carbon dioxide lasts 15-20 minutes, a time length that has been determined as the optimal value through repeated tests. During this process, supercritical carbon dioxide, thanks to its unique physical properties (low viscosity like a gas and high density like a liquid), is able to quickly penetrate every corner of the mould, effectively displacing all the air. During this process, the gas that is evacuated through the exhaust valve gradually changes from air to pure carbon dioxide, this change can be monitored through an online gas analyser, when the concentration of carbon dioxide in the exhaust gas reaches more than 99.9%, it can be considered that the displacement is substantially complete.

[0093] After the injection process is completed, the operator closes the vent valve first and then the inlet valve. This sequence is important to ensure that the high pressure reactor maintains sufficient pressure. At this point, the pressure in the high pressure reactor is typically stabilized at 90-110 bar, which is sufficient to ensure that the carbon dioxide remains in a supercritical state, creating ideal conditions for the subsequent injection molding process.

[0094] This process of air displacement using supercritical carbon dioxide has several significant advantages. First, it is able to completely remove air from the mold and annular cavity 15, which is crucial for preventing air bubbles in the final product. Second, supercritical carbon dioxide has excellent permeability, allowing it to reach small spaces that traditional methods cannot, ensuring the completeness of the displacement. Third, this process is carried out at a relatively mild temperature, which does not cause thermal damage to sensitive electronic components 2 in the annular element 1. Finally, by precisely controlling temperature and pressure, this process creates ideal conditions for subsequent injection molding, which is beneficial for obtaining high-quality molding results.

[0095] Please continue to refer to Figure 1 , S4, mix the pre-prepared plastic material with mixing supercritical carbon dioxide to form a low-viscosity plastic mixture; inject the low-viscosity plastic mixture into the annular cavity 15 and the compensation cavity, maintaining the pressure above the critical pressure of supercritical carbon dioxide during the injection process;

[0096] In one embodiment of the present application, S4 comprises:

[0097] S4.1, mix the pre-prepared plastic material with mixing supercritical carbon dioxide in a high-pressure mixer for 5-10 minutes to form a low-viscosity plastic mixture;

[0098] S4.2, control the temperature of the high-pressure mixer at 40-50°C and maintain the pressure at 100-120 bar;

[0099] S4.3, open the injection valve on the high-pressure reactor connected to the mold, and inject the low-viscosity plastic mixture into the annular cavity 15 and the compensation cavity, with an injection rate controlled at 0.1-0.5 ml / s;

[0100] S4.4, during the injection process, maintain the pressure in the annular cavity 15 and the compensation cavity at 110-130 bar;

[0101] S4.5, after the injection is completed, close the injection valve to ensure that the low-viscosity plastic mixture fills the annular cavity 15 and the compensation cavity.

[0102] In particular, in the embodiments of the present application, the plastic material is preferably an epoxy resin, although in other embodiments it can also be one or a combination of phenol-formaldehyde resin, polyurethane resin, unsaturated polyester resin, silicone resin, melamine-formaldehyde resin, alkyd resin, which exhibit good fluidity and plasticity during the injection and molding stages, enabling precise filling of small spaces, while after curing they have excellent mechanical strength, weather resistance and electrical insulation.

[0103] The mixing process lasts for 5-10 minutes, which is the optimal value determined by repeated experiments, ensuring sufficient mixing without causing changes in material properties due to prolonged time. During the mixing process, the temperature of the high-pressure mixer is precisely controlled within the range of 40-50°C, which is carefully selected to ensure that the plastic material maintains good fluidity without triggering cross-linking reactions. At the same time, the pressure in the mixer is maintained at 100-120 bar, which ensures that the carbon dioxide is always in a supercritical state, enabling sufficient dissolution in the plastic material. For example, for a high-pressure mixer with a volume of 5 liters, the temperature control accuracy is typically required to be ±0.5°C, while the pressure control accuracy needs to be ±1 bar, which is achieved through high-performance temperature sensors, pressure sensors and PID control systems.

[0104] After mixing is complete, the resulting low-viscosity plastic mixture has unique rheological properties, with a viscosity that can be reduced by 50% or more compared to the original plastic material. This low-viscosity property is crucial for subsequent precise injection, as it ensures that the material can fill every corner of the annular cavity 15 and compensation cavity, especially some small structural features.

[0105] Next, the injection valve on the high-pressure reactor connected to the mold is opened, and the low-viscosity plastic mixture is injected into the annular cavity 15 and compensation cavity. The injection rate is controlled within the range of 0.1-0.5 ml / s, which is the result of balancing multiple factors. A slower injection rate helps to avoid material turbulence and reduce bubble formation. For a typical smart ring, the total volume of the annular cavity 15 and compensation cavity is about 2-3 ml, and according to this injection rate, the entire injection process will last 4-30 seconds.

[0106] During the entire injection process, the pressure in the annular cavity 15 and the compensation cavity is strictly controlled in the range of 110-130 bar. This pressure range is higher than the pressure in the mixer, which is intended to ensure that the low viscosity plastic-like mixture does not cause the dissolved carbon dioxide to precipitate prematurely due to a sudden drop in pressure after entering the cavity. The pressure control is achieved by a high-precision pressure sensor provided on the mold and a feedback control loop connected to the injection system. This precise pressure control not only helps to maintain the low viscosity state of the material, but also promotes uniform distribution of the material and reduces defects such as shrinkage and warping.

[0107] When the low viscosity plastic-like mixture completely fills the annular cavity 15 and the compensation cavity, the injection valve is closed. This closing action needs to be fast and accurate, and can be achieved by using a high response speed electromagnetic valve or a pneumatic valve, with a response time controlled within 10 milliseconds. The purpose of quickly closing the valve is to prevent material backflow and ensure that the cavity remains full. After the valve is closed, the system will immediately perform a quick pressure check to confirm that the pressure in the annular cavity 15 and the compensation cavity is maintained within the set range.

[0108] The advantage of this entire process is that it can achieve precise control of the material state and filling process. By using supercritical carbon dioxide, the viscosity of the plastic-like material is significantly reduced, allowing the material to complete the injection at relatively low temperature and pressure, which not only reduces the thermal stress on the electronic components 2 in the annular element 1, but also reduces the wear of the mold. Precise control of the injection rate and pressure ensures that the material can uniformly fill the complex cavity structure, greatly reducing the generation of defects such as bubbles and shrinkage. In addition, the design of the compensation cavity provides sufficient material reserves for subsequent material shrinkage compensation, which is crucial for improving the dimensional accuracy and surface quality of the product.

[0109] Please continue to refer to Figure 1 , S5, control the temperature and pressure to gradually precipitate supercritical carbon dioxide from the low viscosity plastic-like mixture, while gradually depositing and solidifying the plastic-like material in the annular cavity 15; during this process, the low viscosity plastic-like mixture in the compensation cavity is used to compensate for the volume reduction of the low viscosity plastic-like mixture in the annular cavity 15 due to the precipitation of supercritical carbon dioxide;

[0110] In one embodiment of the present application, S5 comprises:

[0111] S5.1, control the temperature of the high-pressure reactor to 45-55°C for 30 minutes;

[0112] S5.2, slowly reduce the pressure in the high-pressure reactor at a rate of 0.5-1 bar / min to gradually precipitate supercritical carbon dioxide from the low viscosity plastic-like mixture;

[0113] S5.3, the temperature of the autoclave is gradually increased to 60-70 °C at a rate of 0.5 °C / min and maintained for 60 minutes;

[0114] S5.4, the pressure inside the autoclave is continuously decreased at a rate slowed down to 0.3-0.5 bar / min;

[0115] S5.5, the temperature of the autoclave is increased to 70-80 °C and maintained for 90 minutes;

[0116] S5.6, the pressure inside the autoclave is slowly decreased to atmospheric pressure at a rate of 0.1-0.2 bar / min;

[0117] S5.7, the pressure change inside the annular chamber 15 is monitored by the pressure sensor installed in the autoclave, ensuring that the low-viscosity plastic-like mixture in the compensation chamber can naturally flow into the annular chamber 15 to compensate for the volume reduction caused by the precipitation of supercritical carbon dioxide until the plastic-like material in the annular chamber 15 is completely solidified.

[0118] In particular, controlling the solidification process of the plastic-like material is a key step to ensure product quality. This process begins with precisely controlling the temperature of the autoclave in the range of 45-55 °C and maintaining this temperature for 30 minutes. This initial temperature range is carefully selected to be higher than the glass transition temperature of the epoxy resin system but lower than the rapid solidification temperature, creating ideal starting conditions for the subsequent slow solidification process. During these 30 minutes, the molecules in the low-viscosity plastic-like mixture begin to move and arrange slowly, preparing for the subsequent cross-linking reaction.

[0119] Next, the pressure inside the autoclave is slowly decreased at a rate of 0.5-1 bar / min. This carefully controlled decompression process allows the supercritical carbon dioxide dissolved in the low-viscosity plastic-like mixture to gradually precipitate. The slow decrease in pressure is crucial for controlling the precipitation rate of carbon dioxide, as too rapid precipitation can lead to the formation of a large number of tiny bubbles in the material, affecting the mechanical properties and appearance quality of the product. For example, for a system with an initial pressure of 120 bar, this decompression process takes 2-4 hours, providing a sufficient time window for the initial solidification of the material.

[0120] As the pressure is reduced, the temperature of the autoclave is gradually increased at a rate of 0.5 °C / min to a range of 60-70 °C and held at this temperature range for 60 minutes. This ramping rate and holding time are determined based on the curing kinetics of the epoxy system. The slow ramping rate ensures uniformity of temperature distribution throughout the annular chamber 15, avoiding stress concentration due to local overheating. During this stage, the cross-linking reaction between epoxy molecules is accelerated, the network structure is gradually formed, and the strength and modulus of the material start to increase significantly.

[0121] After the 60-minute holding period, the pressure inside the autoclave continues to be reduced, but at a slower rate (0.3-0.5 bar / min). This slower rate of pressure reduction is matched to the increasing degree of material curing, which effectively prevents defect formation due to the rapid release of carbon dioxide as the viscosity of the material increases significantly. At the same time, the temperature of the autoclave is further increased to a range of 70-80 °C and held at this temperature range for 90 minutes. This higher temperature promotes complete cross-linking between epoxy molecules, ensuring that the material achieves the desired mechanical properties and thermal stability.

[0122] In the final stage of the curing process, the pressure inside the autoclave is slowly reduced to atmospheric pressure at a rate of 0.1-0.2 bar / min. This extremely slow pressure release process gives the material sufficient time to adapt to the pressure change, minimizing the accumulation of internal stresses. At the same time, the pressure change in the annular chamber 15 is continuously monitored by a high-precision pressure sensor installed inside the autoclave. This real-time monitoring is crucial to ensure that the low-viscosity plastic-like mixture in the compensation chamber can flow naturally into the annular chamber 15, compensating for the volume reduction due to the release of supercritical carbon dioxide until the plastic-like material in the annular chamber 15 is fully cured.

[0123] This precisely controlled curing process has several significant advantages. First, by precisely controlling the temperature and pressure, uniform curing of the plastic-like material is achieved, avoiding the problems of local overheating or incomplete curing that are common in traditional processes. Second, the slow pressure release process effectively prevents the formation and growth of bubbles, significantly improving the internal quality and surface finish of the product. Third, the combination of the compensation chamber design and the pressure monitoring system ensures that the material is replenished in a timely manner during the material shrinkage process, minimizing shrinkage stresses and warping deformation.

[0124] For example, for a smart ring with a diameter of 20mm, the entire curing process can last 6-8 hours. Although this time is relatively long, it ensures the high quality and consistency of the product. During this process, the pressure inside the annular cavity 15 can gradually decrease from the initial 120bar to atmospheric pressure, while the temperature increases from 45℃ to the final 75℃ or so. Through this carefully designed temperature and pressure curve, the dimensional accuracy of the final product can be controlled within ±0.02mm, and the surface roughness can reach Ra0.4μm or better, which are far beyond the level of traditional injection molding process.

[0125] Please continue to refer to Figure 1 , S6, after the plastic material in the annular cavity 15 is completely cured, the annular element 1 is taken out of the mold, cooled to room temperature and packaged.

[0126] Specifically, first, the high-pressure reactor is slowly cooled to near room temperature, which usually takes 2-3 hours to ensure that the internal stress of the annular element 1 does not occur due to rapid temperature changes. Subsequently, the high-pressure reactor is carefully opened and the mold is removed. Next, the male and female molds of the mold are slowly separated by precise mechanical devices such as hydraulic or pneumatic systems to avoid any damage to the annular element 1.

[0127] After the annular element 1 is taken out of the mold, the plastic material remaining in the injection port 16 is carefully cleaned. This cleaning process usually uses precise cutting tools or laser trimming equipment to ensure the accuracy of the cleaning and the smoothness of the surface. For example, for a smart ring with a diameter of 20mm, the cleaning accuracy of the injection port 16 residue usually needs to be controlled within 0.05mm to ensure the sealing of the subsequent packaging.

[0128] After cleaning, the annular element 1 is placed in a thermostat with a temperature control precision of ±0.5℃ and slowly cooled until it reaches room temperature. This slow cooling process usually takes 1-2 hours, which is to further release the internal stress and improve the dimensional stability of the product. After cooling, a high-precision three-coordinate measuring instrument is used to detect the annular element 1 to ensure that its size and shape meet the design requirements.

[0129] Finally, the packaging process is performed, and the carefully designed cover 14 is placed at the injection port 16. The bottom of the cover 14 is in precise abutment with the inner annular abutment wall 123 and the outer annular abutment wall 132. This design not only ensures the aesthetics of the packaging, but also improves the sealing effect. At the connection between the cover 14 and the annular element 1, glue is used for sealing.

[0130] Another embodiment of the present application also provides a smart ring made by the production process of the annular wearable provided by the above-mentioned embodiment, Figure 2A cross-sectional view of an embodiment of a smart ring.

[0131] The smart ring comprises:

[0132] a ring-shaped element 1 comprising an outer ring-shaped shell 11, an inner ring-shaped shell 12, a bezel 13, and a bezel cover 14, the outer ring-shaped shell 11 and the inner ring-shaped shell 12 being oppositely arranged, a bottom periphery of the outer ring-shaped shell 11 being connected with a bottom periphery of the inner ring-shaped shell 12, a top periphery of the outer ring-shaped shell 11 being connected with the bezel 13, the outer ring-shaped shell 11, the inner ring-shaped shell 12, and the bezel 13 jointly defining a ring-shaped cavity 15, an injection port 16 being formed between a top periphery of the bezel 13 and the inner ring-shaped shell 12 and being in communication with the ring-shaped cavity 15, the bezel cover 14 being arranged on the injection port 16;

[0133] an electronic element 2 arranged in the ring-shaped cavity 15;

[0134] a filler 3 formed by solidification of a plastic material, the filler 3 being filled in the ring-shaped cavity 15.

[0135] Specifically, the smart ring formed by the combination of multiple structures allows more flexible material selection and more delicate manufacturing process. Compared with the ring with an integrated solid structure, the smart ring of the present application has significantly improved material compatibility, uses noble metal externally to improve appearance and durability, and uses plastic internally to optimize the working environment of the electronic element 2. Secondly, the manufacturing flexibility is greatly enhanced, and each component can be manufactured and optimized separately. At the same time, the split structure makes it easier to repair or upgrade when needed without replacing the entire ring. In addition, this design provides more possibilities for personalized customization, and users can more easily replace the outer ring-shaped shell 11 of different materials or colors.

[0136] Overall, this design takes into account functionality, reliability, and aesthetics, providing more possibilities for mass production and personalized customization of smart rings, enabling smart rings to achieve higher levels in terms of performance, appearance, and user experience.

[0137] In specific implementation, the material of the inner ring-shaped shell 12 is plastic or titanium. The material of the outer ring-shaped shell 11 is at least one of titanium, gold, K gold, silver, or jade. The material of the bezel 13 is at least one of titanium, gold, K gold, silver, or jade. The material of the bezel cover 14 is at least one of titanium, gold, K gold, silver, or jade.

[0138] Optionally, the electronic element 2 comprises a circuit board 21 and a battery 22.

[0139] The circuit board 21 is electrically connected with the battery 22.

[0140] The circuit board 21 and the battery 22 are respectively arranged in two positions spaced 180 degrees along the circumference within the annular cavity 15, so as to balance the weight distribution of the smart ring.

[0141] Specifically, the circuit board 21 and the battery 22 are arranged in two opposite positions within the annular cavity 15, and the included angle between them is 180 degrees. This means that if the smart ring is placed flat and viewed from above, the circuit board 21 and the battery 22 will be located at the two ends of a diameter.

[0142] The purpose of this design mainly lies in the aspects of counterweight and wearing direction. First, from the perspective of counterweight, the circuit board 21 and the battery 22 are usually the two heaviest components inside the smart ring. Placing them in opposite positions can make the weight distribution more balanced, avoiding the discomfort caused by the over-weight of one side of the ring when worn. This balanced weight distribution can improve the wearing comfort, so that the user will not feel excessive pressure on one side of the finger when wearing for a long time.

[0143] Secondly, in terms of wearing direction, this design allows the user to wear the smart ring at any angle without affecting its functionality or comfort. Regardless of the rotation of the ring, the weight distribution remains balanced. This feature is particularly important because it eliminates the need for the user to consider a specific wearing direction, increasing the product's ease of use.

[0144] Optionally, the inner annular shell 12 is provided with a charging interface 121, and the electronic element 2 includes a charging component 23 arranged in the annular cavity 15 and electrically connected with the battery 22 and the circuit board 21 respectively, and the charging component 23 is exposed through the charging interface 121. By arranging the charging interface 121 on the inner annular shell 12 instead of the outer annular shell 11, the charging function can be ensured while not affecting the appearance design of the ring, so that the product remains beautiful and tidy in the non-charging state.

[0145] The charging component 23 is exposed through the charging interface 121, which means that the user can directly connect the charging cable to the charging interface 121 without the need to disassemble or open the ring for charging. This design greatly improves the daily use convenience of the product, allowing the user to easily charge the smart ring without complicated operations.

[0146] The above description is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made according to the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A manufacturing process for a ring-shaped wearable component, characterized in that, include: S1, provides an annular element and a mold, wherein an annular cavity is formed inside the annular element, an injection port communicating with the annular cavity is provided on the annular element, and a cavity matching the annular element and a compensation cavity communicating with the cavity are provided inside the mold; S2, the annular element is placed in the cavity, wherein the outer wall surface of the annular element is in contact with the inner wall surface of the cavity, and the annular cavity is connected to the compensation cavity through the injection port; S3, inject supercritical carbon dioxide for displacement into the annular cavity and the compensation cavity to displace all the air in the annular cavity and the compensation cavity; S4, mix the pre-prepared plastic material with supercritical carbon dioxide for mixing to form a low-viscosity plastic mixture; inject the low-viscosity plastic mixture into the annular cavity and the compensation cavity, and maintain the pressure higher than the critical pressure of supercritical carbon dioxide during the injection process; S5, control the temperature and pressure to allow supercritical carbon dioxide to gradually precipitate from the low-viscosity plastic mixture, while simultaneously allowing the plastic material in the low-viscosity plastic mixture to gradually deposit and solidify within the annular cavity; during this process, the low-viscosity plastic mixture in the compensation cavity is used to replenish the portion of the low-viscosity plastic mixture volume reduced in the annular cavity due to the precipitation of supercritical carbon dioxide. S6. After the plastic material in the annular cavity has completely solidified, the annular element is removed from the mold, cooled to room temperature, and then encapsulated.

2. The manufacturing process of the ring-shaped wearable component according to claim 1, characterized in that, The annular element includes an outer annular wall and an inner annular wall disposed opposite to each other, and the injection port is formed between the outer annular wall and the inner annular wall; The mold includes an annular outer sidewall and an annular inner sidewall arranged opposite to each other, and a compensation cavity and a fluid passage communicating with the compensation cavity are formed between the annular outer sidewall and the annular inner sidewall. The distance between the outer annular wall and the inner annular wall is smaller than the distance between the outer annular wall and the inner annular wall; wherein... After the annular element is placed in the cavity, the inner wall surface of the outer annular wall and the inner wall surface of the inner annular wall are both located between the outer annular wall and the inner annular wall. The low-viscosity plastic mixture flows into the compensation cavity through the fluid inlet and flows into the annular cavity under the guidance of the inner wall surface of the outer annular wall or the inner wall surface of the inner annular wall.

3. The manufacturing process of the ring-shaped wearable component according to claim 2, characterized in that, The outer annular wall has a protruding outer annular abutment wall, and the inner annular wall has a protruding inner annular abutment wall; wherein... After the annular element is placed in the cavity, the outer annular wall is moved so that its end abuts against the outer annular abutment wall, and the inner annular wall is moved so that its end abuts against the inner annular abutment wall.

4. The manufacturing process of the ring-shaped wearable component according to claim 1, characterized in that, The S3 includes: S3.1, The mold containing the annular element is placed inside a high-pressure reactor, the high-pressure reactor including an inlet valve and an exhaust valve; S3.2, Seal the high-pressure reactor and adjust the internal temperature of the high-pressure reactor to 35-40℃; S3.3, Open the exhaust valve and inject supercritical carbon dioxide for replacement into the high-pressure reactor through the inlet valve. The initial injection pressure is 80-100 bar. S3.4 After continuously injecting supercritical carbon dioxide for replacement for 15-20 minutes, close the exhaust valve and the inlet valve to maintain the pressure of the high-pressure reactor.

5. The manufacturing process of the ring-shaped wearable component according to claim 4, characterized in that, The S4 includes: S4.1, mix the pre-prepared plastic material with supercritical carbon dioxide for mixing in a high-pressure mixer for 5-10 minutes to form a low-viscosity plastic mixture; S4.2, the temperature of the high-pressure mixer is controlled at 40-50℃ and the pressure is maintained at 100-120 bar; S4.3, Open the injection valve on the high-pressure reactor that is connected to the mold, and inject the low-viscosity plastic mixture into the annular cavity and the compensation cavity, with the injection rate controlled at 0.1-0.5 ml / s; S4.4 During the injection process, the pressure in the annular cavity and the compensation cavity is maintained at 110-130 bar; S4.5 After injection is completed, close the injection valve to ensure that the low-viscosity plastic mixture fills the annular cavity and the compensation cavity.

6. The manufacturing process of the ring-shaped wearable component according to claim 5, characterized in that, The S5 includes: S5.1, The temperature of the high-pressure reactor is controlled at 45-55℃ and maintained for 30 minutes; S5.2, the pressure inside the high-pressure reactor is slowly reduced at a rate of 0.5-1 bar / min, so that supercritical carbon dioxide gradually precipitates from the low-viscosity plastic mixture; S5.3, gradually increase the temperature of the high-pressure reactor to 60-70℃ at a rate of 0.5℃ / min, and maintain it for 60 minutes; S5.4, continue to reduce the pressure inside the high-pressure reactor, slowing the rate of reduction to 0.3-0.5 bar / min; S5.5, raise the temperature of the high-pressure reactor to 70-80℃ and maintain it for 90 minutes; S5.6, the pressure inside the high-pressure reactor is slowly reduced to atmospheric pressure at a rate of 0.1-0.2 bar / min; S5.7 By using a pressure sensor installed in the high-pressure reactor, the pressure change in the annular cavity is monitored to ensure that the low-viscosity plastic mixture in the compensation cavity can flow naturally into the annular cavity to replenish the volume reduction caused by the supercritical carbon dioxide precipitation until the plastic material in the annular cavity is completely solidified.

7. A smart ring, characterized in that, The smart ring is manufactured using the manufacturing process of a ring-shaped wearable device as described in any one of claims 1 to 6, and the smart ring comprises: An annular element (1) includes an outer annular shell (11), an inner annular shell (12), a face ring (13), and a face cover (14). The outer annular shell (11) and the inner annular shell (12) are arranged opposite to each other. The bottom periphery of the outer annular shell (11) is connected to the bottom periphery of the inner annular shell (12). The top periphery of the outer annular shell (11) is connected to the face ring (13). The outer annular shell (11), the inner annular shell (12), and the face ring (13) together define an annular cavity (15). An injection port (16) communicating with the annular cavity (15) is formed between the top periphery of the face ring (13) and the inner annular shell (12). The face cover (14) is placed over the injection port (16). Electronic component (2), wherein the electronic component (2) is disposed within the annular cavity (15); The filler (3) is formed by curing a plastic material and fills the annular cavity (15).

8. The smart ring according to claim 7, characterized in that, The inner annular shell (12) is made of plastic or titanium; and / or, The outer annular shell (11) is made of at least one of titanium, gold, karat gold, pure silver, or jade; and / or, The material of the face ring (13) is at least one of titanium, gold, karat gold, sterling silver, or jade; and / or, The material of the cover (14) is at least one of titanium, gold, karat gold, pure silver or jade.

9. The smart ring according to claim 7, characterized in that, The electronic component (2) includes a circuit board (21) and a battery (22); The circuit board (21) is electrically connected to the battery (22); The circuit board (21) and the battery (22) are respectively disposed at two positions 180 degrees apart in the circumferential direction within the annular cavity (15) to ensure a balanced weight distribution of the smart ring.

10. The smart ring according to claim 9, characterized in that, The inner annular shell (12) is provided with a charging interface (121). The electronic component (2) includes a charging component (23) disposed in the annular cavity (15) and electrically connected to the battery (22) and the circuit board (21) respectively. The charging component (23) is exposed through the charging interface (121).

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