Film pasting pressure head assembly, film pasting equipment and film pasting method

Abstract

The invention discloses a film pasting pressing head assembly, film pasting equipment and a film pasting method, and relates to the technical field of workpiece film pasting, the film pasting pressing head assembly comprises a base plate, a silica gel head and a plurality of adjusting pieces, the silica gel head comprises a connecting part and an attaching part which are connected with each other, the attaching part comprises an attaching face deviating from the connecting part, and a cavity and a liquid inlet communicating with the cavity are formed in the attaching part; liquid is transmitted into the cavity through the liquid inlet so as to adjust the temperature and pressure of the attaching face, one end of each telescopic shaft adjusting piece is connected with the telescopic shaft base plate, and the other end of each telescopic shaft adjusting piece is connected with the connecting part. The film pasting pressure head assembly can adjust the pressure and temperature of the pasting surface, reduces the bad risk of bubbles or wrinkles and the like, can adjust the pressure of the adjusting piece at the corresponding position according to the shape of a curved lens, and has the advantages of reducing lens pressing damage and improving the pasting uniformity.

Description

Technical Field

[0001] This application relates to the field of workpiece film application technology, and in particular to a film application pressure head assembly, film application equipment and film application method. Background Technology

[0002] Currently, most lens coatings are flat-surface coatings, where the lenses themselves are planar. However, with the increasing demand for curved lenses, the need for coatings on curved lenses has also arisen. Furthermore, as virtual reality devices evolve towards lightweight designs and higher immersion, the demand for complex curved components such as optical lenses and exterior parts is surging. Applying traditional flat-surface coating methods directly to curved surfaces can lead to film buckling and wrinkling, severely impacting the coating quality.

[0003] Therefore, related technologies generally use a silicone head that is compatible with the lens as a contouring part for attaching the film. However, this design still has the problems of uneven film adhesion and crushing of the lens. Summary of the Invention

[0004] The main purpose of this application is to provide a film-applying pressure head assembly, film-applying equipment, and film-applying method, which aims to at least improve the current technical problems of uneven film application and lens crushing on curved lenses.

[0005] To achieve the above objectives, according to some embodiments of this application, this application provides a film-applying pressure head assembly, comprising:

[0006] substrate,

[0007] A silicone head, comprising a connecting portion and an attachment portion connected to each other, the attachment portion including an attachment surface opposite to the connecting portion, the attachment portion forming a cavity and a liquid inlet communicating with the cavity, and liquid being transferred into the cavity through the liquid inlet to adjust the temperature and pressure of the attachment surface;

[0008] Multiple adjusting members, one end of each adjusting member is connected to the substrate, and the other end is connected to the connecting part.

[0009] In some embodiments, each of the adjusting components includes a connecting rod and a spring fitted around the outer periphery of the connecting rod. The substrate is provided with a plurality of sliding holes. The first end of the connecting rod is slidably installed in the sliding hole, and the second end of the connecting rod is connected to the silicone head. One end of the spring is used to connect to the substrate, and the other end is connected to the silicone head. The stiffness of each spring is not exactly the same.

[0010] In some embodiments, the stiffness of each spring decreases from the center of the silicone head towards the outer periphery; or, the stiffness of each spring increases from the center of the silicone head towards the outer periphery.

[0011] In some embodiments, the connecting portion includes a plurality of connectors spaced apart, the other end of the spring is connected to the connector, and a gap is provided between one connector and the adjacent connector.

[0012] In some embodiments, the attachment surface is a flexible surface, and the film-applying head assembly further includes an infusion tube, one end of which is connected to the cavity to regulate the temperature and pressure of the flexible surface by transmitting liquid into the cavity.

[0013] In some embodiments, the film-applying pressure head assembly further includes a power pump and an oil tank, the power pump being connected to the oil tank and the infusion pipe, a temperature sensor and a pressure sensor being installed in the cavity, and a heater being installed in the oil tank.

[0014] In some embodiments, the cavity includes a plurality of sub-cavities spaced apart, and the infusion tube includes a plurality of sub-tubes. The number of the plurality of sub-cavities and the plurality of sub-tubes are equal and correspond one-to-one. Each of the sub-cavities is provided with the temperature sensor and the pressure sensor.

[0015] In some embodiments, the adjustment member includes a drive member, the drive member including a body and a telescopic shaft telescopically connected to the body, the body being mounted on the substrate, and the end of the telescopic shaft away from the body being connected to the silicone head.

[0016] According to some embodiments of this application, this application provides a film-applying device, which includes a body and the film-applying pressure head assembly described above. A connecting end is provided on the side of the substrate away from the adjusting member, and the body is connected to the connecting end.

[0017] According to some embodiments of this application, this application provides a film application method, the film application method comprising the following steps:

[0018] Select multiple springs with different stiffnesses according to the concave and convex shape of the part to be coated;

[0019] The drive substrate moves down to the silicone head and is bonded to the part to be coated.

[0020] In some embodiments, multiple springs with different stiffnesses are selected according to the concave-convex shape of the film to be applied;

[0021] If the part to be covered with film is concave, the stiffness of the spring is set to gradually decrease from the center of the silicone head to the periphery;

[0022] If the part to be covered with film is a convex part, the stiffness of the spring is set to gradually increase from the center of the silicone head to the periphery.

[0023] In some embodiments, after the step of selecting multiple springs of different stiffnesses according to the concave-convex shape of the film to be applied, the method further includes the step of:

[0024] Liquid is introduced into the cavity, the temperature of the liquid is controlled to a first preset temperature, and the pressure of the liquid in the cavity is controlled to be adjusted to a first preset pressure;

[0025] The step of moving the driving substrate down to the silicone head to bond with the film to be applied includes:

[0026] After the driving substrate comes into contact with the silicone head and the film to be applied, the liquid temperature is kept constant and the liquid pressure in the cavity is reduced.

[0027] After the silicone head is fully bonded to the film to be applied, the temperature of the liquid is reduced and the pressure of the liquid in the cavity is increased.

[0028] In the above solution, the film-applying pressure head assembly includes a substrate, a silicone head, and multiple adjusting components. The silicone head includes a connecting portion and an attaching portion connected to each other. The attaching portion includes an attaching surface facing away from the connecting portion. The attaching portion forms a cavity and a liquid inlet communicating with the cavity. Liquid is transferred into the cavity through the liquid inlet to adjust the temperature and pressure of the attaching surface. One end of each telescopic shaft adjusting component is connected to the telescopic shaft substrate, and the other end is connected to the connecting portion. This invention can adjust the pressure and temperature of the attaching surface, reducing the risk of defects such as bubbles or wrinkles. It can also adjust the pressure of the corresponding adjusting components according to the shape of the curved lens, offering advantages such as reducing lens damage and improving bonding uniformity.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a film-applying pressure head assembly according to some embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the structure of the silicone head of the film-applying pressure head assembly in some embodiments of this application;

[0033] Figure 3 This is another structural schematic diagram of the film-applying pressure head assembly according to some embodiments of this application;

[0034] Figure 4 This is a schematic flowchart of the film application method according to the first embodiment of this application;

[0035] Figure 5 This is a schematic flowchart of the film application method according to the second embodiment of this application;

[0036] Figure 6 This is a schematic flowchart of the film application method according to the third embodiment of this application.

[0037] Explanation of icon numbers:

[0038] 100. Film applicator head assembly;

[0039] 1. Substrate; 2. Silicone head; 21. Connecting part; 211. Connecting head; 212. Gap; 22. Attaching part; 221. Attaching surface; 222. Connecting surface; 223. Cavity; 3. Adjusting component; 31. Connecting rod; 32. Spring; 4. Infusion tube; 5. Power pump; 6. Oil reservoir; 7. Temperature sensor; 8. Pressure sensor; 9. Pressure regulating valve; 10. Connecting end.

[0040] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, it should be considered that such a combination does not exist and is not within the scope of protection claimed in this application. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0046] The descriptions of directions such as "up", "down", "front", "back", "left", and "right" in this application are based on the directions shown in the figure and are only used to explain the relative positional relationship between the components in the posture shown in the figure. If the specific posture changes, the directional indication will also change accordingly.

[0047] Currently, most lens coatings are flat-panel coatings, applied to flat lenses. With the increasing demand for curved lenses, the need for coatings for curved lenses has also arisen. However, directly applying traditional flat-panel coatings to curved lenses results in film bending and wrinkling, severely impacting the coating quality. Related technologies generally use silicone tips that conform to the lens shape as a guide for film application; however, this design still suffers from uneven film adhesion and the risk of lens breakage.

[0048] After careful research, the applicant discovered that the pressure head structure in related technologies is simplistic, using a single component to adjust the overall vertical movement of the pressure head. While this adjustment method is suitable for planar lenses, it cannot dynamically adapt to changes in the curvature of curved lenses, leading to a mismatch in the pressure field distribution across the curved surface geometry. For example, when touching areas of abrupt curvature change in the lens, such as the edge of a virtual reality glasses lens, pressure overload can easily occur, causing the lens to shatter, or pressure underload can result in uneven film adhesion.

[0049] Therefore, the present invention provides a film-applying pressure head assembly.

[0050] Reference Figure 1According to some embodiments of this application, this application provides a film-applying pressure head assembly 100, including a substrate 1, a silicone head 2 and a plurality of adjusting members 3. The silicone head 2 includes a connecting portion 21 and an attaching portion 22 connected to each other. The attaching portion 22 includes an attaching surface 221 facing away from the connecting portion 21. The attaching portion 22 forms a cavity 223 and a liquid inlet communicating with the cavity 223. Liquid is transmitted into the cavity 223 through the liquid inlet to adjust the temperature and pressure of the attaching surface 221. One end of each adjusting member 3 is connected to the substrate 1 and the other end is connected to the connecting portion 21.

[0051] The substrate 1 is a mounting plate on which multiple adjusting members 3 are spaced apart. The substrate 1 also has a connecting end 10 for connecting to the main body of the film-applying equipment. The main body can control the film-applying pressure head assembly 100 to move left and right, press down to apply the film, and rise back to its original position. The silicone head 2 is the pressure head used for pressing the film. The silicone head 2 is made of silicone material, which has a certain degree of elasticity and can reduce pressure damage to the film material during the pressing process.

[0052] The attachment portion 22 forms a cavity 223 with a liquid inlet. The cavity 223 can be connected to the outside through a liquid inlet tube 4, allowing liquid to be added to or removed from the cavity 223, which can be oil. This embodiment uses a cavity 223 and a liquid inlet within the attachment portion 22 of the silicone head 2. Oil is injected through the inlet to control pressure and temperature, thereby controlling the temperature of the membrane material. The amount of oil also controls the pressure transmitted to the membrane material. While the silicone head 2 can be heated in related technologies, existing heating relies on external preheating, which cannot control the temperature of the silicone head 2 during the pressing process, leading to defects such as air bubbles and wrinkles due to unsuitable temperature. This application, by setting a hollow silicone head 2, allows for real-time compensation of the oil temperature by controlling the temperature of the input oil. The oil temperature can also be adjusted during the pressing process to soften the membrane material and reduce defects such as air bubbles or wrinkles. Furthermore, the attachment surface 221 can be made thinner, making it easier to deform and adhere to the membrane material.

[0053] Multiple adjustment components 3 are provided here. Each adjustment component 3 is connected to the substrate 1 and the connecting part 21 at both ends. The multiple adjustment components 3 are independent of each other and can be adjusted individually without affecting each other. In a specific embodiment, different forces can be applied to different positions of the silicone head 2 by adjusting the multiple adjustment components 3. This allows for fine-tuning of the pressure in local areas according to the curvature and shape of the curved lens. For example, a smaller force is applied to convex positions to avoid damage, while a larger force is applied to concave positions to ensure tight adhesion, reduce the generation of bubbles or wrinkles, and improve the uniformity of adhesion. This embodiment can adjust the pressure and temperature of the bonding surface 221, reducing the risk of defects such as bubbles or wrinkles. At the same time, it can also adjust the pressure of the corresponding adjustment component 3 according to the shape of the curved lens, which has the advantages of reducing lens damage and improving the uniformity of adhesion.

[0054] Reference Figure 1 and Figure 2 In some embodiments, each adjusting member 3 includes a connecting rod 31 and a spring 32 fitted around the outer periphery of the connecting rod 31. The base plate 1 is provided with a plurality of sliding holes. The first end of the connecting rod 31 is slidably installed in the sliding hole, and the second end of the connecting rod 31 is connected to the silicone head 2. One end of the spring 32 is used to connect to the base plate 1, and the other end is connected to the silicone head 2. The stiffness of each spring 32 is not exactly the same.

[0055] In one specific embodiment of the adjusting component 3, each adjusting component 3 includes a connecting rod 31 and a spring 32. The spring 32 is fitted around the outer periphery of the connecting rod 31. The base plate 1 has multiple sliding holes on the side facing the connecting rod 31, and sliding grooves are provided on the sidewalls of the sliding holes. A guide rail can be provided on the connecting rod 31, and the connecting rod 31 is slidably connected to the sliding groove via the guide rail. Specifically, the sliding is arranged along the thickness direction of the base plate 1, which can also be described as the vertical direction. For example, in the vertical direction... Figure 1 As indicated by the middle arrow Z, the up and down directions described in this application are also as follows. Figure 1As shown in the top and bottom diagram. The connecting rod 31 is also vertically slidable within the sliding hole and can slide vertically. The other end of the connecting rod 31 is connected to the silicone head 2, which can move together with the connecting rod 31. It should be noted that the sliding hole is generally a blind hole, so that the connecting rod 31 will not protrude through the upper surface of the substrate 1, thus limiting the upward adjustment limit of the silicone head 2. One end of the spring 32 is used to connect to the substrate 1. This means that initially, the spring 32 may not be in contact with the substrate 1, but after the silicone head 2 contacts the part to be coated, the connecting rod 31 moves up a certain distance, and the spring 32 then comes into contact with the substrate 1. The other end of the spring 32 is connected to the silicone head 2. There are multiple springs 32, and their stiffness is not entirely the same; that is, some may be the same, or all may be different, but not completely identical. Stiffness here can be understood as the spring constant of the spring 32. The greater the stiffness, the greater the spring constant, and the greater the force required to drive the spring 32 to undergo the same deformation. Conversely, the smaller the stiffness of spring 32, the smaller its elastic coefficient, and the smaller the force required to drive spring 32 to undergo the same deformation. The vertical position of silicone head 2 can be adjusted by sliding the connecting rod 31 and the sliding hole. The film to be applied in this application refers to the lens. In the specific design process, springs 32 with different stiffnesses can be selected for different positions according to the shape of the film to be applied. Specifically, for the corresponding protruding position, the stiffness of the spring 32 at the corresponding position can be designed to be smaller. In this way, the spring 32 with smaller stiffness is easier to contract during the downward movement of silicone head 2, reducing the local pressure on the lens. For the concave position, the stiffness of the spring 32 at the corresponding position can be designed to be larger. In this way, the spring 32 with larger stiffness is less likely to contract during the downward movement of silicone head 2, allowing the film material to adhere tightly to the lens and providing a larger local force to the lens, thus ensuring a tight fit between the lens and the film material and improving the uniformity of film application.

[0056] Reference Figure 1 and Figure 2In some embodiments, the stiffness of each spring 32 decreases from the center of the silicone head 2 towards the outer periphery; or, the stiffness of each spring 32 increases from the center of the silicone head 2 towards the outer periphery. The stiffness of the spring 32 can be selected according to the shape of the lens. If the lens is a concave mirror, the outer side of the lens will contact the silicone head 2 first, so the stiffness of the spring 32 located on the outer periphery should be designed to be smaller, that is, the stiffness of the spring 32 decreases from the center of the silicone head 2 towards the outer periphery. Conversely, if the lens is a convex mirror, the middle position of the lens will contact the silicone head 2 first, so the stiffness of the spring 32 located at the center of the silicone head 2 should be designed to be smaller, that is, the stiffness of the spring 32 increases from the center of the silicone head 2 towards the outer periphery. Of course, if the lens is not a perfectly regular concave or convex surface, but has multiple convex or concave surfaces, springs 32 with smaller stiffness can be designed at the corresponding convex surface positions, and springs 32 with larger stiffness can be designed at the corresponding concave surface positions.

[0057] Reference Figure 2 In some embodiments, the connecting portion 21 includes a plurality of connectors 211 spaced apart. The other end of the spring 32 is connected to one connector 211, and a gap 212 is provided between one connector 211 and its adjacent connector 211. The connecting portion 21 may also be made of silicone material and has a certain degree of elasticity. The connecting portion 21 includes a plurality of connectors 211 spaced apart, and the number of connectors 211 may be equal to the number of springs 32 and connected one-to-one. The two ends of each spring 32 are respectively connected to the substrate 1 and a connector 211. Each connector 211 and its adjacent connector 211 support are provided with a gap 212. The connector 211 has a certain degree of elasticity, and the gap 212 is the space left for the elastic deformation of the connector 211. This makes it easier for the connector 211 to take shape. The shaping of the connector 211 can actually absorb the reaction force from the lens, which can not only play a buffering role and reduce the damage to the lens that may be caused by excessive local impulse during the downward movement of the silicone head 2, but also allow for fine adjustment of the layout position of the silicone head 2 through the deformation of the connector 211. By setting multiple connectors 211, stress buffering and adjustment at local locations can be achieved. Furthermore, gaps 212 are provided between each connector 211. Compared to using a single integral connector 21, the gaps 212 provide elastic deformation space, making it easier for each connector 211 to deform, thus achieving a buffering and adjustment function. Additionally, the attachment part 22 is the part used for contacting and bonding with the membrane material.

[0058] Reference Figure 1 and Figure 2In some embodiments, the attachment surface 221 is a flexible surface. The film-applying pressure head assembly 100 also includes an infusion tube 4, one end of which is connected to the cavity 223 to adjust the temperature and pressure of the flexible surface by introducing liquid into the cavity 223. The attachment part 22 may include a connecting surface 222 and an attachment surface 221. The connecting surface 222 is planar and has multiple connectors 211. The side of the connecting surface 222 facing away from the connectors 211 is the attachment surface 221. The attachment surface 221 and the connecting surface 222 together form a closed cavity 223. Liquid, such as oil, can be added to or removed from the cavity 223 through the infusion tube 4. The flexible surface refers to the fact that the attachment surface 221 can deform with changes in oil pressure or temperature. The flexible surface can be made thinner to facilitate better adhesion to the membrane material. The temperature of the flexible surface can be adjusted by controlling the temperature of the input oil. In related technologies, the silicone head 2 is a solid pressure head. Although the silicone head 2 has a certain elasticity, its hardness is still much greater than that of the film material, making it difficult to make small adjustments according to the shape of the film material or lens. In this embodiment, by setting a cavity 223 in the silicone head 2 and making the attachment surface 221 thinner, it is easier to deform and adhere to the film material. By controlling the pressure and temperature through the injected oil, it is not only beneficial to control the temperature and pressure, but also to enable the attachment surface 221 to better adhere to the film material.

[0059] Reference Figure 3 In some embodiments, the film-applying pressure head assembly 100 further includes a power pump 5 and an oil tank 6. The power pump 5 is connected to the oil tank 6 and the infusion pipe 4. A temperature sensor 7 and a pressure sensor 8 are installed in the cavity 223, and a heater is installed in the oil tank 6.

[0060] Specifically, oil temperature regulation can be achieved by installing a temperature sensor 7 inside the cavity 223 to detect the oil temperature within the cavity. If the oil temperature is too low, the heater inside the oil tank 6 is turned on to heat the oil to a certain temperature. Then, the power pump 5 is turned on to pump the oil into the cavity 223 through the infusion pipe 4, raising the oil temperature inside the cavity 223. Alternatively, a portion of the oil in the cavity 223 can be extracted first, followed by the injection of hot oil, thus achieving real-time oil temperature control. The use of hot oil is primarily for heating the bonding surface 221 to a suitable temperature for softening the membrane material, reducing membrane stress, minimizing the generation of bubbles and wrinkles, and improving the uniformity and tightness of the bonding. The pressure sensor 8 can be located at the bottom of the cavity 223. The pressure can be adjusted by regulating the amount of oil inside the cavity 223. When pressure needs to be increased, oil can be injected through the power pump 5 to increase the pressure; when pressure needs to be decreased, a portion of the oil can be extracted through the power pump 5 to decrease the pressure, keeping the oil pressure within a preset range. It should be noted that oil pressure and temperature need to be adjusted at different stages of bonding to achieve a better bonding effect. This application can achieve real-time adjustment of pressure and temperature, which will be described in detail in the method steps. Of course, a pressure regulating valve 9 can also be installed on the infusion tube 4 to adjust the flow rate of the infusion tube 4.

[0061] In some embodiments, the cavity 223 includes a plurality of sub-cavities spaced apart, and the infusion tube 4 includes a plurality of sub-tubes. The number of the plurality of sub-cavities is equal to the number of the plurality of sub-tubes and they are arranged in a one-to-one correspondence. Each sub-cavity is provided with a temperature sensor 7 and a pressure sensor 8.

[0062] By configuring it into multiple sub-cavities, and by individually detecting the temperature and pressure in each sub-cavity, and by connecting each sub-cavity to a separate sub-tube, the pressure and temperature of each sub-cavity can be adjusted individually, thus making the adjustment more precise.

[0063] In some embodiments, the adjusting member 3 includes a driving member, which includes a body and a telescopic shaft telescopically connected to the body. The body is mounted on the substrate 1, and the end of the telescopic shaft away from the body is connected to the silicone head 2.

[0064] As another specific embodiment of the adjusting component 3, the adjusting component 3 may include a driving component, which may be a cylinder or a hydraulic cylinder. Those skilled in the art will understand that using a cylinder or hydraulic cylinder for adjustment can improve the precision of the pressure adjustment. Specifically, the pressure is adjusted by moving the telescopic shaft along the vertical direction by the distance driven by the main body.

[0065] According to some embodiments of this application, this application provides a film-applying device. The film-applying device includes a main body and the aforementioned film-applying pressure head assembly 100. A connecting end 10 is provided on the side of the substrate 1 facing away from the adjusting member 3, and the main body is connected to the connecting end 10. The film-applying setup involves pressing the film material tightly onto the object to be film-applied using the silicone head 2. Since the film-applying device includes all the technical solutions of all embodiments of the aforementioned film-applying pressure head assembly 100, it possesses at least all the beneficial effects brought by the aforementioned technical solutions, which will not be elaborated upon here.

[0066] Reference Figure 4 , Figure 4 This is a schematic flowchart of the film application method according to the first embodiment of this application. The film application method includes the following steps:

[0067] S100, select multiple springs 32 with different stiffnesses according to the concave and convex shape of the part to be covered with film.

[0068] Each adjusting component 3 includes a connecting rod 31 and a spring 32. The spring 32 is fitted around the outer periphery of the connecting rod 31. Multiple sliding holes are provided on the side of the base plate 1 facing the connecting rod 31, and sliding grooves are provided on the sidewalls of the sliding holes. The connecting rod 31 is slidably connected to the sliding grooves. One end of the spring 32 is connected to the base plate 1, and the other end is connected to the silicone head 2. There are multiple springs 32, and their stiffness is not entirely the same; that is, some may be the same, or all may be different, but they are not completely identical. Stiffness here can be understood as the spring constant of the spring 32. The greater the stiffness, the greater the spring constant, and the greater the force required to drive the spring 32 to undergo the same deformation. Conversely, the smaller the stiffness of the spring 32, the smaller the spring constant, and the less the force required to drive the spring 32 to undergo the same deformation. In the specific design process, springs 32 with different stiffnesses can be selected for different positions based on the shape of the part to be coated. Specifically, for protruding positions, the stiffness of the corresponding spring 32 can be designed to be smaller. This way, the spring 32 with smaller stiffness is more likely to contract during the downward movement of the silicone head 2, reducing the local pressure on the lens. For recessed positions, the stiffness of the corresponding spring 32 can be designed to be larger. This way, the spring 32 with larger stiffness is less likely to contract during the downward movement of the silicone head 2, allowing the coating material to adhere tightly to the lens and providing a larger local force to the lens, thus improving the uniformity of coating application.

[0069] S200, the drive substrate 1 moves down to the silicone head 2 and is bonded to the part to be coated.

[0070] The film application equipment includes a film application head assembly 100, which applies the film material to the object to be coated, such as a lens. The silicone head 2 is provided with an attachment surface 221, the shape of which is adapted to the shape of the object to be coated.

[0071] In the above embodiments of the present invention, multiple springs 32 with different stiffnesses are selected according to the concave and convex shape of the film to be applied, and the substrate 1 is driven to move down to the silicone head 2 to be applied to the film. Springs 32 with different stiffnesses can be selected at different positions of the silicone head 2 according to actual needs, which helps to reduce the risk of lens breakage, and at the same time can make the film application tight and improve the uniformity of film application.

[0072] Reference Figure 5 , Figure 5 This is a flowchart illustrating the film application method according to the second embodiment of this application. Multiple springs 32 with different stiffnesses are selected according to the concave and convex shape of the part to be filmed.

[0073] S101, if the part to be applied is concave, the stiffness of the spring 32 is set to gradually decrease from the center of the silicone head 2 to the surrounding area; if the part to be applied is convex, the stiffness of the spring 32 is set to gradually increase from the center of the silicone head 2 to the surrounding area.

[0074] If the lens is a concave part, such as a concave mirror, the stiffness of the spring 32 can be selected according to the shape of the lens. If the lens is a concave mirror, the outer side of the lens will contact the silicone head 2 first, and the stiffness of the spring 32 set on the outer periphery should be designed to be smaller. That is, the stiffness of the spring 32 decreases from the center of the silicone head 2 to the outer periphery.

[0075] If the lens is convex, such as a convex mirror, then the center of the lens will contact the silicone head 2 first. Therefore, the stiffness of the spring 32, which is positioned in the middle of the silicone head 2, should be designed to be relatively small. In other words, the stiffness of the spring 32 should increase gradually from the center of the silicone head 2 towards the outer periphery. Of course, if the lens is not a perfectly regular concave or convex surface, but has multiple convex or concave surfaces, a spring 32 with lower stiffness can be designed for the convex surfaces, and a spring 32 with higher stiffness can be designed for the concave surfaces.

[0076] In the above embodiments of this application, multiple springs 32 with different stiffnesses are arranged according to the concave and convex shape of the part to be coated, which helps to further reduce lens breakage and improve the uniformity of coating.

[0077] Reference Figure 6 , Figure 6 This is a schematic flowchart of the film application method according to the second embodiment of this application. The film application method further includes the following steps:

[0078] S103, liquid is introduced into cavity 223, the temperature of the liquid is controlled to a first preset temperature, and the pressure of the liquid in cavity 223 is controlled to a first preset pressure.

[0079] The attachment portion 22 forms a cavity 223. The attachment portion 22 includes an attachment surface 221 facing away from the connecting portion 21. The attachment surface 221 is a flexible surface. The membrane pressing head assembly 100 also includes an infusion tube 4. One end of the infusion tube 4 is connected to the cavity 223 to adjust the temperature, pressure, and shape of the flexible surface by introducing liquid into the cavity 223. Specifically, the attachment portion 22 includes a connecting surface 222 and an attachment surface 221. The connecting surface 222 is planar and has multiple connectors 211. The side of the connecting surface 222 facing away from the connectors 211 is the attachment surface 221. The attachment surface 221 and the connecting surface 222 together form a closed cavity 223. The cavity 223 is connected to the outside through the infusion tube 4. Liquid can be added to or removed from the cavity through the infusion tube 4. The liquid can be oil. The flexible surface means that the attachment surface 221 can deform with changes in oil pressure or temperature, which facilitates better adhesion to the membrane material. The temperature of the flexible surface can be adjusted by controlling the temperature of the input oil. In related technologies, the silicone head 2 is a solid pressure head. Although the silicone head 2 has a certain degree of elasticity, its hardness is still much greater than that of the film material, making it difficult to make minor adjustments according to the shape of the film material or lens. In this embodiment, by setting a cavity 223 inside the silicone head 2 and making the attachment surface 221 thinner, it is easier to deform and adhere to the film material. By controlling the pressure and temperature through the injected oil, the attachment surface 221 can better adhere to the film material.

[0080] The steps of moving the drive substrate 1 down to the silicone head 2 to bond with the film to be applied include:

[0081] S201, after the drive substrate 1 and silicone head 2 come into contact with the part to be coated, the liquid temperature is kept constant and the liquid pressure in the cavity 223 is reduced.

[0082] After step S103, the silicone head 2, filled with oil, expands and deforms, driving the substrate 1 to move downwards. Once the silicone head 2 makes contact with the part to be bonded, the oil temperature can be kept constant. Specifically, the oil temperature inside the cavity 223 can be regulated by the power pump 5 and the heater. At this time, the control substrate 1 continues to move downwards, and the oil pressure is continuously reduced according to the downward pressure distance. The oil pressure can be measured by the pressure sensor 8. The reduction of oil pressure is achieved by the power pump 5 extracting oil from the cavity 223. Maintaining a constant temperature is to soften the silicone head 2, making it easier to flow with large deformation and better adhere to the part to be bonded.

[0083] S202, after the silicone head 2 is fully bonded to the part to be coated, the liquid temperature is reduced and the liquid pressure in the cavity 223 is increased.

[0084] Specifically, lowering the oil temperature can be achieved by introducing cold oil, or by extracting hot oil and then introducing some cold oil; increasing the liquid pressure can be achieved by introducing oil. Lowering the oil temperature and continuously maintaining the increased oil pressure can harden the membrane material, allowing it to adhere firmly to the substrate.

[0085] In the above embodiments of the present invention, real-time control of oil temperature and oil pressure can be achieved. This control includes not only preheating and pre-oil pressure during the preparation process of bonding, but also real-time adjustment during the bonding process, so that the film material and the film to be bonded are bonded more tightly.

[0086] The above description is merely an optional embodiment of this application and does not limit the scope of protection of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of this application.

Claims

1. A film-applying pressure head assembly, characterized in that, include: substrate, A silicone head, comprising a connecting portion and an attachment portion connected to each other, the attachment portion including an attachment surface opposite to the connecting portion, the attachment portion forming a cavity and a liquid inlet communicating with the cavity, and liquid being transferred into the cavity through the liquid inlet to adjust the temperature and pressure of the attachment surface; Multiple adjusting members, one end of each adjusting member is connected to the substrate, and the other end is connected to the connecting part.

2. The film-applying pressure head assembly according to claim 1, characterized in that, Each of the aforementioned adjusting components includes a connecting rod and a spring fitted around the outer periphery of the connecting rod. The base plate is provided with a plurality of sliding holes. The first end of the connecting rod is slidably installed in the sliding hole, and the second end of the connecting rod is connected to the silicone head. One end of the spring is used to connect to the base plate, and the other end is connected to the silicone head. The stiffness of each spring is not exactly the same.

3. The film-applying pressure head assembly according to claim 2, characterized in that, The stiffness of each spring decreases from the center of the silicone head towards the outer periphery; and / or, The stiffness of each spring increases from the center of the silicone head outwards.

4. The film-applying pressure head assembly according to claim 2, characterized in that, The connecting part includes a plurality of connectors spaced apart, the other end of the spring is connected to the connector, and a gap is provided between one connector and the adjacent connector.

5. The film-applying pressure head assembly according to claim 4, characterized in that, The attachment surface is a flexible surface, and the film-applying pressure head assembly also includes an infusion tube, one end of which is connected to the cavity to regulate the temperature and pressure of the flexible surface by transmitting liquid into the cavity.

6. The film-applying pressure head assembly according to claim 5, characterized in that, The film-applying pressure head assembly also includes a power pump and an oil tank. The power pump is connected to the oil tank and the infusion pipe. A temperature sensor and a pressure sensor are installed in the cavity, and a heater is installed in the oil tank.

7. The film-applying pressure head assembly according to claim 6, characterized in that, The cavity includes multiple sub-cavities spaced apart, and the infusion tube includes multiple sub-tubes. The number of sub-cavities and sub-tubes are equal and correspond one-to-one. Each sub-cavity is equipped with the temperature sensor and the pressure sensor.

8. The film-applying pressure head assembly according to claim 1, characterized in that, The adjusting component includes a driving component, which includes a body and a telescopic shaft that is telescopically connected to the body. The body is mounted on the substrate, and the end of the telescopic shaft away from the body is connected to the silicone head.

9. A film application device, characterized in that, The film-applying device includes a body and a film-applying pressure head assembly as described in any one of claims 1 to 8, wherein a connecting end is provided on the side of the substrate facing away from the adjusting member, and the body is connected to the connecting end.

10. A method for applying a film, characterized in that, The film application method includes the following steps: Select multiple springs with different stiffnesses according to the concave and convex shape of the part to be coated; The drive substrate moves down to the silicone head and is bonded to the part to be coated.

11. The film application method according to claim 10, characterized in that, The method involves selecting multiple springs of different stiffnesses based on the concave-convex shape of the part to be coated; If the part to be covered with film is concave, the stiffness of the spring is set to gradually decrease from the center of the silicone head to the periphery; If the part to be covered with film is a convex part, the stiffness of the spring is set to gradually increase from the center of the silicone head to the periphery.

12. The film application method according to claim 10, characterized in that, Following the step of selecting multiple springs of different stiffnesses based on the concave-convex shape of the part to be coated, the method further includes the following step: Liquid is introduced into the cavity, and the temperature of the liquid is controlled to a first preset temperature, and the pressure of the liquid in the cavity is controlled to a first preset pressure; The step of moving the driving substrate down to the silicone head to bond with the film to be applied includes: After the driving substrate comes into contact with the silicone head and the film to be applied, the liquid temperature is kept constant and the liquid pressure in the cavity is reduced. After the silicone head is fully bonded to the film to be applied, the temperature of the liquid is reduced and the pressure of the liquid in the cavity is increased.

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