Motor, camera assembly, and electronic device

Abstract

Provided in the present application are a motor, a camera assembly, and an electronic device. The motor in the present application comprises a motor stator and a motor mover, wherein the motor mover comprises a sliding groove and a sliding member at least partially located in the sliding groove; and a surface of the sliding groove and / or a surface of the sliding member serves as a bonding surface, a lubricating film layer is provided on the bonding surface, and the composition of the lubricating film layer comprises a perfluoropolyether silane. The perfluoropolyether silane has an excellent lubricating property and wear-resisting property, and the lubricating film layer formed therefrom has a low surface energy, such that the sliding member is enabled to have a lower sliding resistance and a smoother sliding effect when sliding on the surface of the sliding groove, thereby reducing the frictional resistance of the motor.

Description

Motors, camera components, and electronics

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 7, 2024, with application number 202410174254.9 and application name “Motor, camera assembly and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a motor, a camera assembly, and an electronic device. Background Art

[0003] Contact motors are crucial components in cameras, driving the lens to perform image capture. Traditional contact motors typically employ a slot between the lens carrier and the housing, with balls or rollers installed in these slots to reduce friction and power consumption during lens carrier movement. However, as camera optical performance improves, lens modules become heavier. The motors driving heavier lenses require greater magnetic thrust, resulting in higher power consumption. Therefore, it is desirable to reduce frictional resistance while maintaining the original motor size, thereby reducing the required magnetic thrust, driving current, and ultimately reducing camera power consumption.

[0004] The friction resistance of the motor can be reduced by applying lubricating grease to the friction interface between the motor's slide shaft / ball and its corresponding slide groove. Currently, there are two main methods of lubricating: one is the immersion lubricating oil solution, which involves placing the lubricating oil in a container, then immersing the slide shaft or ball in batches, then removing it, drying it, and manually assembling it to the slide groove of the motor assembly after the lubricating oil has completely evaporated and formed a film; the other is the dispensing or brushing lubricating oil solution, which involves first assembling the slide shaft or ball to the corresponding slide groove, then applying grease with a dispensing machine or a dry film lubricant with a brush. However, the above lubrication solutions are affected by the lubrication method, and after the grease film is formed, it is impossible to ensure that the film layer is evenly distributed. Under ideal friction conditions, the interface friction coefficient can only reach the friction coefficient of the grease itself. The lubrication effect of the motor is difficult to meet the increasingly demanding requirements of the lens module.

[0005] Therefore, how to reduce the friction resistance of the motor is still a technical problem that needs to be solved urgently in this field.

[0006] Summary of the Invention

[0007] The present application provides a motor, a camera assembly and an electronic device. The motor of the present application has low friction resistance and requires less magnetic thrust when driving the lens, so that the camera assembly including the motor has lower power consumption.

[0008] A motor includes a motor stator and a motor mover, wherein the motor mover includes a slide groove and a sliding part at least partially located in the slide groove, the surface of the slide groove and / or the surface of the sliding part serves as a bonding surface, and a lubricating film layer is provided on the bonding surface, and the composition of the lubricating film layer includes perfluoropolyether silane.

[0009] In an optional embodiment, the lubricating film layer includes a first film layer and a second film layer stacked together, the first film layer is disposed on the surface of the bonding surface, and the second film layer is disposed on the surface of the first film layer;

[0010] Wherein, the first film layer is a silicon dioxide layer, and the second film layer is a perfluoropolyether silane layer.

[0011] In an optional embodiment, the thickness of the first film layer is 10 to 25 nm.

[0012] In an optional embodiment, the thickness of the second film layer is 20-45 nm.

[0013] In an optional embodiment, the D50 particle size of the silicon dioxide in the first film layer is 1 to 3 mm.

[0014] A second aspect of the present application provides a method for preparing the motor as described above, comprising the following steps:

[0015] Under vacuum conditions, a raw material including the perfluoropolyether silane is evaporated onto the bonding surface to form the lubricating film layer.

[0016] In an optional embodiment, the evaporation is carried out at 1.0×10 -3 ~3.0×10 -3 Pa under vacuum.

[0017] In an optional embodiment, the raw material further includes silicon dioxide, and the step of vapor-depositing the raw material including the perfluoropolyether silane onto the bonding surface to form the lubricating film layer includes the following steps:

[0018] Using a first evaporation source to heat the silicon dioxide to evaporate it into silicon dioxide gas molecules, and depositing the silicon dioxide gas molecules on the bonding surface to form a first film layer;

[0019] heating the perfluoropolyether silane using a second evaporation source to evaporate it into perfluoropolyether silane gas molecules, and depositing the perfluoropolyether silane gas molecules on the surface of the first film layer to form a second film layer;

[0020] The first film layer and the second film layer together constitute the lubricating film layer.

[0021] In an optional embodiment, the evaporation rate of the silicon dioxide is

[0022] In an optional embodiment, the evaporation rate of the perfluoropolyether silane is

[0023] A third aspect of the present application provides a camera assembly, comprising the motor provided in the first aspect of the present application.

[0024] The fourth aspect of the present application provides an electronic device, comprising the camera assembly provided by the third aspect of the present application.

[0025] The present application provides a motor comprising a motor stator and a motor mover, the motor mover comprising a slide groove and a sliding member at least partially located within the slide groove, the surface of the slide groove and / or the surface of the sliding member serving as a bonding surface, a lubricating film layer being provided on the bonding surface, wherein the lubricating film layer comprises perfluoropolyether silane. Perfluoropolyether silane has excellent lubrication and wear resistance, and the lubricating film layer formed has low surface energy, enabling the sliding member to have lower sliding resistance and smoother sliding effect when sliding on the slide groove surface, thereby reducing the frictional resistance of the motor, reducing the magnetic thrust required by the motor to drive the lens, and further reducing the magnitude of the driving current, ultimately reducing the power consumption of the camera assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] FIG1 is a schematic diagram showing the contact between the sliding groove and the sliding member before the lubricating film layer is provided;

[0028] FIG2 is a schematic diagram showing the contact between the slide groove and the sliding member after the lubricating film layer of the present application is provided;

[0029] FIG3 is a cross-sectional schematic diagram of a motor stator and a motor mover according to an embodiment of the present application;

[0030] FIG4 is a cross-sectional schematic diagram of a motor stator and a motor mover according to another embodiment of the present application;

[0031] FIG5 is a schematic diagram of the three-dimensional structure of a motor stator and a motor mover according to another embodiment of the present application;

[0032] FIG6 is a schematic structural diagram of a lubricating film layer provided on the surface of a slide groove as a bonding surface according to an embodiment of the present application;

[0033] FIG7 is a schematic diagram of the chute structure without surface treatment;

[0034] FIG8 is a schematic diagram of the chute structure after the first film layer is evaporated;

[0035] FIG9 is a flow chart of a method for preparing a lubricating film layer according to an embodiment of the present application;

[0036] FIG10 is a schematic diagram of the evaporation process of the lubricating film layer and the assembly process of the sliding member and the slide groove according to an embodiment of the present application;

[0037] FIG11 is a qualitative test diagram of the surface energy of the lubricating film layer of Example 1 of the present application;

[0038] FIG12 is a qualitative test diagram of the surface energy of the lubricating film layer of Comparative Example 1 of the present application;

[0039] FIG13 is a qualitative test diagram of the surface energy of the chute surface in Comparative Example 2 of the present application;

[0040] FIG14 is a qualitative test diagram of the surface energy of the slideway surface without lubrication treatment.

[0041] Explanation of the accompanying reference numerals: 10 - motor mover; 11 - slide groove; 12 - sliding member; 13 - lubricating film layer; 13a - first film layer; 13b - second film layer; 20 - motor stator; 21 - fixing groove; 30 - motor assembly; 40 - fixture; 50 - vacuum coating machine. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] A first aspect of an embodiment of the present application provides a motor, comprising a motor stator and a motor mover, wherein the motor mover comprises a slide groove and a sliding part at least partially located in the slide groove, the surface of the slide groove and / or the surface of the sliding part serving as a bonding surface, a lubricating film layer being provided on the bonding surface, and the composition of the lubricating film layer comprising perfluoropolyether silane.

[0044] Perfluoropolyether silane refers to a polymer obtained by coupling perfluoropolyether (PFPE) with siloxane, with PFPE at one end and siloxane at the other end. Its structural formula can be represented by PFPE-Si(OR)3, where R represents an alkyl group, such as methyl, ethyl, etc.

[0045] PFPE includes four types: D-type, K-type, Y-type and Z-type. Among them, the molecular structure of D-type PFPE is C3F7O (CF2CF2CF2O) x The molecular structure of C2F5, K-type PFPE is C3F7O[CF(CF3)CF2O] x The molecular structure of C2F5, Y-type PFPE is CF3O[CF(CF3)CF2O] x (CF2O) y The molecular structure of CF3, Z-type PFPE is CF3O (CF2CF2CF2O) x (CF2O) y CF3.

[0046] Silicones include, but are not limited to, monomethylsiloxane and / or dimethylsiloxane.

[0047] The perfluoropolyether portion of the perfluoropolyether silane forms an outward-facing, low-surface-energy film that provides lubrication. The siloxane portion bonds to the adhesive surface substrate via -Si-O- bonds, generating a high bonding force and enhancing the wear resistance of the lubricating film. Furthermore, perfluoropolyether silane exhibits superior high-temperature resistance, radiation resistance, and chemical stability compared to other types of organic fluorine lubricants, such as polytetrafluoroethylene. By including perfluoropolyether silane in the lubricating film, the present invention achieves lower sliding resistance and smoother sliding between the slideway and the sliding member during relative sliding, thereby reducing the frictional resistance of the motor.

[0048] The inventors have discovered that an oil-based marker can be used to draw a line on the lubricating film layer on the surface of the slide groove. By observing the ink traces on the film layer, the surface energy of the film layer can be judged. Specifically, when the ink trace does not shrink after the oil-based marker is used to draw a line on the surface of the lubricating film layer, and continuous and uninterrupted oil-based ink traces appear, it indicates that the surface energy of the lubricating film layer is large; when the ink shrinks after the oil-based marker is used to draw a line on the surface of the lubricating film layer, and only discontinuous dot-shaped oil-based ink traces appear, or even no oil-based ink traces are left after drawing the line, it indicates that the surface energy of the lubricating film layer is small, and its small surface energy is beneficial to reducing the friction resistance of the motor.

[0049] Figure 1 is a schematic diagram of the contact between the slide and the sliding part before the lubricating film layer is set, and Figure 2 is a schematic diagram of the contact between the slide and the sliding part after the lubricating film layer of the present application is set. Please refer to Figures 1 and 2. After the slide 11 and the sliding part 12 in contact under the macroscopic state are decomposed through step S1, they are decomposed into a contact state in which N slide molecules and N sliding part molecules are in contact with each other. After decomposition through step S2, the contact state between a single slide molecule and a single sliding part molecule can be seen. Finally, after decomposition through step S3, the microscopic contact state between the slide molecule and the sliding part molecule can be seen. When the chute 11 and the sliding member 12 slide relative to each other, friction is generated in the opposite direction of the sliding. Comparing the schematic diagrams of FIG1 and FIG2 after decomposition at S3, it can be seen that before the lubricating film layer 13 is provided, the surface adhesion of the chute 11 is good, the intermolecular attraction between the chute 11 and the sliding member 12 is strong, the contact area between the two is large, the contact angle is acute, the surface energy is high, and the friction generated between the two is large. However, after the lubricating film layer 13 is provided, the surface adhesion of the chute 11 is poor, the intermolecular attraction between the chute 11 and the sliding member 12 is weak, the contact area between the two is small, the contact angle is obtuse, the surface energy is low, and the friction generated between the two is small. This shows that the provision of the lubricating film layer of the present application can significantly reduce the frictional resistance of the motor.

[0050] Figure 3 is a cross-sectional schematic diagram of a motor stator and a motor mover according to an embodiment of the present application, and Figure 4 is a cross-sectional schematic diagram of a motor stator and a motor mover according to another embodiment of the present application. As shown in Figures 3 and 4, the motor includes a motor mover 10 and a motor stator 20, and the motor mover 10 includes a slide groove 11 and a sliding member 12 at least partially located in the slide groove 11, wherein the surface of the slide groove 11 and / or the surface of the sliding member 12 serve as a bonding surface, and a lubricating film layer is provided on the bonding surface.

[0051] The lubricating film layer of the present application may be provided only on the surface of the slide groove 11 or only on the surface of the sliding member 12 , or may be provided on both the surface of the slide groove 11 and the surface of the sliding member 12 .

[0052] The present application does not specifically limit the shape of the chute, which can be a U-shaped groove or a V-shaped groove commonly used in the art. As shown in Figure 3, the shape of the chute is a U-shaped groove, and as shown in Figure 4, the shape of the chute is a V-shaped groove.

[0053] The slide grooves in motor rotors are usually made of plastic, which is more easily combined with perfluoropolyether silane to form a lubricating film layer with good uniformity and low surface energy.

[0054] This application does not limit the type of sliding element; it can be a ball bearing or a sliding shaft. The ball bearing can be made of metal or ceramic, and the sliding shaft can be made of metal, ceramic, or plastic. The inventors have discovered that when the sliding shaft is made of plastic, providing a lubricating film layer on its surface is more conducive to reducing the surface energy of the sliding shaft, further reducing the frictional resistance of the motor.

[0055] As shown in Figures 3 and 4, the motor stator 20 includes a fixed groove 21 arranged opposite to the slide groove 11. The fixed groove 21 is used to fix the sliding member 12, and the sliding member 12 is partially located outside the fixed groove 21. The sliding member 12 located outside the fixed groove 21 can contact the slide groove 11 and slide on the slide groove 11.

[0056] Figure 5 is a schematic diagram of the three-dimensional structure of the motor stator and the motor mover of an embodiment of the present application. As shown in Figure 5, the sliding member 12 is fixed in the fixing groove 21 in a card-type manner, and a portion of the sliding member 12 protrudes from the surface of the motor stator 20. When the motor mover 10 moves horizontally, the portion of the sliding member 12 protruding from the motor stator 20 contacts the slide groove of the motor mover 10 and slides on the slide groove surface.

[0057] In a preferred embodiment, the lubricating film layer includes a first film layer and a second film layer stacked together, wherein the first film layer is arranged on the surface of the bonding surface, and the second film layer is arranged on the surface of the first film layer; wherein the first film layer is a silicon dioxide layer, and the second film layer is a perfluoropolyether silane layer.

[0058] Figure 6 is a structural schematic diagram of an embodiment of the present application in which a lubricating film layer is provided on the surface of the slide groove as the bonding surface. As shown in Figure 6, a lubricating film layer 13 is provided on the surface of the slide groove 11. The lubricating film layer 13 includes a first film layer 13a and a second film layer 13b that are stacked. The first film layer 13a is provided on the surface of the slide groove 11, and the second film layer 13b is provided on the surface of the first film layer 13a.

[0059] In the above embodiment, the perfluoropolyether silane layer is the outermost layer, providing a low surface energy sliding interface for the slide groove and the sliding part, while the silicon dioxide layer can act as a transition layer. The silicon dioxide contains silanol bonds, which have better bonding force with the slide groove substrate, and are connected to the perfluoropolyether silane in the perfluoropolyether silane layer through the chemical bond connection method shown in Formula I, generating high bonding force, making the connection between the lubricating film layer and the bonding surface more secure.

[0060] The silica particle size also affects the bonding strength of the first film layer. A smaller silica particle size helps the first film layer have a larger specific surface area and improves its density, thereby strengthening the bonding strength between the first film layer, the chute substrate, and the second film layer. Based on these considerations, the silica D50 particle size can be controlled within the range of 1 to 3 mm.

[0061] The thicker the silicon dioxide layer is, the more beneficial it is to improving the wear resistance of the lubricating film layer. However, too thick a silicon dioxide layer is not conducive to reducing the surface friction coefficient of the lubricating film layer.

[0062] The thicker the perfluoropolyether silane layer, the more conducive it is to reducing the sliding resistance of the sliding part in the lubricating film layer. However, if the thickness of the second film layer is too large, it will increase unnecessary manufacturing costs and easily cause the perfluoropolyether silane layer to fall off due to solvent on the surface of the silicon dioxide layer.

[0063] Based on comprehensive considerations of the manufacturing cost, wear resistance and improved sliding performance of the lubricating film layer, the thickness of the first film layer is preferably controlled to be 10-25 nm, and the thickness of the second film layer is preferably controlled to be 20-45 nm.

[0064] More preferably, the thickness of the first film layer is controlled to be 20-25 nm, and the thickness of the second film layer is preferably controlled to be 40-45 nm.

[0065] In a specific embodiment, the thickness of the first film layer can be 10 nm, 15 nm, 20 nm, 21 nm, 23 nm, 25 nm, or a range between any two thereof.

[0066] In a specific embodiment, the thickness of the second film layer can be 20 nm, 30 nm, 40 nm, 41 nm, 43 nm, 45 nm, or a range between any two thereof.

[0067] A second aspect of the present application provides a method for preparing the motor as described above, comprising the following steps: under vacuum conditions, evaporating a raw material including the perfluoropolyether silane onto the bonding surface to form the lubricating film layer.

[0068] Vacuum evaporation is a process in which an evaporation source is used to heat the raw materials that make up the lubricating film layer, causing it to vaporize and evaporate, and then the gaseous raw materials are deposited on the surface of the slide to form a lubricating film layer. Compared with the traditional method of immersing the sliding surface in lubricating oil, applying lubricating oil with a dispensing machine or brush, or spraying, the lubricating film layer formed by vacuum evaporation has better uniformity and lower surface energy, which can significantly improve the sliding properties of the slide surface, making the sliding parts have lower sliding resistance and smoother sliding effects.

[0069] During the vacuum coating process, the vacuum degree is an important factor affecting the quality of the film layer. Specifically, a higher vacuum degree can prevent the slide surface from being oxidized by air or infiltrated by impurities, which is beneficial to improving the bonding strength between the lubricating film layer and the slide.

[0070] In a specific embodiment, vacuum evaporation is performed at 1.0×10 -3 ~3.0×10 -3The above vacuum conditions are conducive to the preparation of a lubricating film layer with high purity and high bonding strength.

[0071] In a specific embodiment, the above raw materials include silicon dioxide in addition to perfluoropolyether silane, and the raw materials including perfluoropolyether silane are evaporated on the bonding surface to form a lubricating film layer, which includes the following steps:

[0072] Using a first evaporation source to heat silicon dioxide to evaporate it into silicon dioxide gas molecules, and depositing the silicon dioxide gas molecules on the bonding surface to form a first film layer;

[0073] Using a second evaporation source to heat the perfluoropolyether silane to evaporate it to form perfluoropolyether silane gas molecules, and depositing the perfluoropolyether silane gas molecules on the surface of the first film layer to form a second film layer;

[0074] The first film layer and the second film layer together constitute a lubricating film layer.

[0075] Taking the surface of the slide groove as the bonding surface as an example, the above process of preparing the lubricating film layer is explained. Figure 7 is a schematic diagram of the slide groove structure that has not been surface treated. After silicon dioxide is evaporated on the surface of the slide groove 11 that has not been surface treated, a first film layer can be formed. Figure 8 is a schematic diagram of the slide groove structure after the first film layer is evaporated. As shown in Figure 8, the first film layer 13a is formed on the surface of the slide groove. Furthermore, perfluoropolyether silane is continued to be evaporated on the surface of the first film layer 13a to obtain the second film layer. As shown in Figure 6, the second film layer 13b is formed on the surface of the first film layer 13a, and the first film layer 13a and the second film layer 13b together constitute the lubricating film layer 13.

[0076] The present application does not specifically limit the types of the first and second evaporation sources; they may be electron guns or evaporation boats commonly used in the art, and the two may be of the same or different types. The evaporation sources heat the raw material, evaporating it into a uniform vapor, which then condenses to form a uniform film layer.

[0077] When an evaporation boat is used as the first evaporation source or the second evaporation source, the raw material to be evaporated can be placed in the evaporation boat and then heated.

[0078] When an electron gun is used as the first evaporation source or the second evaporation source, the raw material to be evaporated can be placed in a high-temperature resistant open container, such as a crucible, and then the electron gun is used to evaporate the raw material.

[0079] Furthermore, the evaporation rate of silicon dioxide is The evaporation rate of perfluoropolyether silane is

[0080] The evaporation rate affects the uniformity and density of the film layer. The lower the evaporation rate, the better the uniformity and density of the resulting film layer. The first film layer is a silicon dioxide layer, which can enhance the wear resistance of the lubricating film layer. A film layer structure that is too loose will not be conducive to improving wear resistance, while a film layer structure that is too dense will make it difficult for perfluoropolyether silane to penetrate, which is not conducive to reducing the friction coefficient of the lubricating film layer. Similarly, the second film layer should not be too loose or too dense, otherwise it will be difficult for the lubricating film layer to achieve both excellent wear resistance and low friction resistance.

[0081] When the evaporation rate within the above numerical range is used to evaporate the first film layer raw material and the second film layer raw material, the lubricating film layer can have both low friction resistance and excellent wear resistance.

[0082] The present application does not impose any particular limitation on the evaporation temperature of the raw materials for the first film layer and the second film layer, as long as the raw materials constituting the first film layer and the second film layer can be evaporated without decomposing.

[0083] The distance between the evaporation source and the surface being deposited is also a significant factor influencing the quality of the lubricating film. When the distance between the evaporation source and the surface being deposited is too large, the energy of the gas molecules incident on the surface is low, and relatively few gas molecules migrate to the surface, resulting in reduced film flatness and uneven distribution.

[0084] The inventors have found through research that when the distance between the evaporation source and the bonding surface to be evaporated is ≤900 mm, it is conducive to preparing a lubricating film layer with a smooth and uniform surface.

[0085] The vacuum evaporation process of the present application can be completed in a vacuum coating machine, which contains a vacuum chamber. The motor assembly including the bonding surface can be placed in the cavity of the vacuum chamber to complete the vacuum evaporation process.

[0086] In a preferred embodiment, the vacuum chamber temperature is between 25°C and 60°C, which is also the temperature of the bonding surface. This temperature range is more conducive to uniform condensation of the vapor deposition material on the bonding surface. The temperature setting of the vacuum chamber depends primarily on the bonding surface material and the heat resistance of the lubricating film material. Excessively high temperatures will cause the lubricating film material to decompose or volatilize, hindering its lubrication properties and making it difficult to effectively reduce the friction between the lubricating film and the sliding part.

[0087] Furthermore, before vacuum evaporating the raw material of the lubricating film layer onto the bonding surface, the bonding surface is also subjected to an ion source cleaning process. FIG9 is a flow chart of a method for preparing a lubricating film layer according to an embodiment of the present application. As shown in FIG9 , the preparation of the lubricating film layer includes the following steps:

[0088] S101: Clean the bonding surface with an ion source;

[0089] S102: Vapor-depositing a silicon dioxide layer on the cleaned bonding surface;

[0090] S103: vapor-depositing a perfluoropolyether silane layer on the surface of the silicon dioxide layer.

[0091] The ion source cleaning process in the above-mentioned S101 step can be completed in a vacuum coating machine using a unit equipped with an ion source. Specifically, the sliding part and / or slide groove including the bonding surface can be placed in the cavity of the vacuum chamber, and the vacuum degree of the vacuum evaporation machine can be set to the vacuum degree to be evaporated. After the cavity of the vacuum chamber reaches the set vacuum degree, argon or nitrogen is introduced, and an RF power supply is used to excite the argon or nitrogen to generate high-energy plasma (i.e., ion source) and bombard the bonding surface. After bombardment by the ion source, the bonding surface can be cleaned.

[0092] Ion source cleaning can effectively remove organic and oxide contamination on the bonding surface, enhance the adhesion of the bonding surface, and can also etch and modify the bonding surface to roughen the bonding surface, remove the weak boundary layer, and increase the roughness of the bonding surface, which is more conducive to the evaporation of the lubricating film layer.

[0093] In a specific embodiment, the ion source cleaning power is 250W and the cleaning time is 1 to 3 minutes, which can fully clean the bonding surface.

[0094] The processes of evaporating the silicon dioxide layer and the perfluoropolyether silane layer in the above steps S102 and S103 can refer to the above steps and will not be repeated here.

[0095] Furthermore, before evaporating the lubricating film layer, a jig should be used to cover the parts other than the bonding surface, and after the evaporation is completed, the process of assembling the sliding parts and the sliding groove is also included.

[0096] Taking the surface of the slide groove as the bonding surface as an example, the above evaporation process and the assembly process of the sliding part and the slide groove are explained. Figure 10 is a schematic diagram of the evaporation process of the lubricating film layer and the assembly process of the sliding part and the slide groove of an embodiment of the present application. As shown in Figure 10, the evaporation process of the lubricating film layer and the assembly process of the sliding part and the slide groove include the following steps.

[0097] S11: Swing the motor assembly 30 including the chute 11;

[0098] S12: Use the jig 40 to cover the portion other than the surface of the chute 11;

[0099] The chute 11 can be a U-shaped chute or a V-shaped chute.

[0100] S13: placing the motor assembly 30 in a vacuum chamber of the vacuum coating machine 50, and evaporating the raw material of the lubricating film layer onto the surface of the chute 11 in batches to form a lubricating film layer;

[0101] The batch process in this step means that multiple motor assemblies 30 can be placed in the vacuum coating machine 50 at the same time, and the coating can be carried out in batches, which can improve the efficiency of the coating.

[0102] S14: taking out the motor assembly 30 after vacuum evaporation;

[0103] It can be seen from the schematic diagram that the lubricating film layer 13 has been formed on the surface of the sliding groove 11 at this time.

[0104] S15: Automatically assemble the sliding member 12 into the groove of the sliding slot 11.

[0105] A third aspect of an embodiment of the present application provides a camera assembly, which includes the above-mentioned motor. In addition, the camera assembly also includes a lens, wherein the motor can be mounted outside the lens to drive the lens to move.

[0106] A fourth aspect of the present application provides an electronic device including the aforementioned camera assembly. The electronic device may be a mobile phone, tablet computer, personal digital assistant, monitor, camera, personal computer, laptop computer, wearable device, driving recorder, or other device.

[0107] It is understandable that the above-mentioned electronic device also includes a casing, and a lens hole is opened on the casing at the position corresponding to the lens of the camera assembly body, so that light can be taken into the camera assembly through the lens hole to realize the shooting function of the electronic device.

[0108] The motor provided in this application is described in detail below through specific embodiments.

[0109] Example 1

[0110] This embodiment provides a motor, including a motor stator and a motor mover, wherein the structures of the motor stator and the motor mover are shown in Figure 3, the motor stator 20 includes a fixed groove 21 and a sliding member 12 fixed in the fixed groove 21, the motor mover 10 includes a slide groove 11, the slide groove 11 is made of plastic material, the sliding member 12 is a ceramic slide shaft, and a lubricating film layer is provided on the surface of the slide groove 11.

[0111] This embodiment also provides a method for preparing the lubricating film layer, comprising the following steps:

[0112] 1) Place the chute on a plate, use a fixture to cover the part other than the chute surface, and then place the chute into the vacuum chamber of the vacuum coating machine;

[0113] 2) Set the vacuum degree of the vacuum chamber to 1.0×10 -3 Pa, the temperature was 25°C, argon was introduced into the vacuum chamber, and the ion source was cleaned on the slide surface at a power of 250 W for 1 min;

[0114] 3) Maintaining the vacuum degree and temperature of the vacuum chamber constant, a tungsten evaporation boat is used to heat silicon dioxide with a D50 particle size of 1.5 mm to sublime it into silicon dioxide gas molecules, and the sublimated silicon dioxide gas molecules are deposited on the surface of the chute to obtain a first film layer;

[0115] In this step, the distance between the evaporation boat and the chute surface is 900 mm, and the evaporation rate of silicon dioxide is The thickness of the first film layer evaporated is 20 nm;

[0116] 4) Maintaining the vacuum degree and temperature of the vacuum chamber constant, heating (CH3O)2Si-PFPE (PFPE is D-type) using a tungsten evaporation boat to sublimate it into gas molecules, and depositing the sublimated gas molecules on the first film layer to obtain a second film layer, wherein the first film layer and the second film layer together constitute a lubricating film layer;

[0117] In this step, the distance between the evaporation boat and the surface of the first film layer is 900 mm, and the evaporation rate of (CH3O)2Si-PFPE (PFPE is D type) is The thickness of the evaporated second film layer is 40 nm.

[0118] Example 2

[0119] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0120] Change the temperature of the vacuum chamber from 25°C to 60°C.

[0121] Example 3

[0122] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0123] Change the temperature of the vacuum chamber from 25°C to 100°C.

[0124] Example 4

[0125] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0126] The perfluoropolyether silane was replaced from (CH3O)2Si-PFPE (type K) to (CH3O)2Si-PFPE (type D).

[0127] Example 5

[0128] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0129] The perfluoropolyether silane was replaced from (CH3O)2Si-PFPE (K type) to (CH3O)2Si-PFPE (Y type).

[0130] Example 6

[0131] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0132] The perfluoropolyether silane was replaced from (CH3O)2Si-PFPE (K type) to (CH3O)2Si-PFPE (Z type).

[0133] Example 7

[0134] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0135] The silica with a D50 particle size of 1.5 mm was replaced with silica with a D50 particle size of 5 mm.

[0136] Example 8

[0137] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0138] The thickness of the evaporated second film layer is 10 nm.

[0139] Example 9

[0140] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0141] The thickness of the evaporated second film layer is 20 nm.

[0142] Example 10

[0143] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0144] The thickness of the evaporated second film layer is 60 nm.

[0145] Example 11

[0146] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0147] In this embodiment, step 3) is omitted and step 4) is replaced by: maintaining the vacuum degree and temperature of the vacuum chamber unchanged, using a tungsten evaporation boat to heat (CH3O)2Si-PFPE (PFPE is D type) to sublimate it into gas molecules, and depositing the sublimated gas molecules on the cleaned chute surface to obtain a second film layer, wherein the second film layer is the lubricating film layer; in this step, the distance between the tungsten evaporation boat and the cleaned chute surface is 900 mm, and the evaporation rate of (CH3O)2Si-PFPE (PFPE is D type) is The thickness of the evaporated second film layer is 40 nm.

[0148] Example 12

[0149] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0150] The thickness of the first evaporated film layer is 10 nm.

[0151] Example 13

[0152] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0153] The thickness of the first evaporated film layer is 50 nm.

[0154] Example 14

[0155] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0156] The thickness of the evaporated first film layer is 10 nm, and the thickness of the evaporated second film layer is 10 nm.

[0157] Example 15

[0158] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0159] The evaporation rate of (CH3O)2Si-PFPE (PFPE is D type) is

[0160] Example 16

[0161] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0162] The evaporation rate of (CH3O)2Si-PFPE (PFPE is D type) is

[0163] Example 17

[0164] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0165] The evaporation rate of silicon dioxide is

[0166] Example 18

[0167] This embodiment provides a motor, the structure of which is consistent with that of embodiment 1, and the method for preparing the lubricating film layer is also basically consistent with that of embodiment 1, with the following differences:

[0168] The evaporation rate of silicon dioxide is

[0169] Comparative Example 1

[0170] This comparative example provides a motor having the same structure as that of Example 1. The lubricating film layer is formed by spraying polytetrafluoroethylene on the surface of the slideway. The specific preparation method includes the following steps:

[0171] 1) After placing the chute on the plate, use a fixture to cover the part other than the chute surface;

[0172] 2) Using a spray gun, polytetrafluoroethylene is sprayed on the surface of the slideway to form a polytetrafluoroethylene lubricating film layer with a thickness of 40 nm.

[0173] Comparative Example 2

[0174] This comparative example provides a motor, whose structure is consistent with that of Example 1, except that the lubricating film layer of this comparative example is formed on the surface of the sliding part. The specific preparation process is: 16wt% of D-type perfluoropolyether base oil, 4wt% of thickener polytetrafluoroethylene and 80wt% of perfluoroalkane are mixed and emulsified to form perfluoropolyether grease; perfluoropolyether grease is applied to the surface of the ceramic sliding shaft (sliding part 12) with a brush, and after the perfluoroalkane evaporates, a lubricating film layer with a thickness of about 20μm is formed.

[0175] Test Case

[0176] The lubricating film layers of the above embodiments and comparative examples were tested for the following parameters:

[0177] 1. Static friction coefficient and dynamic friction coefficient

[0178] Test method: Use Dage push-pull tester, fix the motor stator and slide shaft with fixture, attach weight block to the surface of motor rotor, and increase vertical positive pressure F N , push the motor mover at a constant speed, make the slide groove in the motor mover contact the slide shaft and slide 200-1000 μm at a constant speed of 300-500 μm / s, record the thrust F required under different positive pressures (that is, the magnitude of the friction force f under different positive pressures), friction coefficient = thrust F / positive pressure F N .

[0179] The thrust F1 and vertical positive pressure F recorded at the moment when the slide groove and the slide shaft start to slide N Calculate the static friction coefficient, that is, static friction coefficient = F1 / F N .

[0180] The thrust F2 and vertical positive pressure F required after stable uniform motion through the slide groove and the slide shaft N Calculate the coefficient of kinetic friction, that is, the coefficient of kinetic friction = F2 / F N .

[0181] The test results of static friction coefficient and dynamic friction coefficient are shown in Table 1.

[0182] 2. Wear resistance

[0183] Test method: Use a Dage push-pull tester to perform reciprocating friction 1000 times, and then calculate the rate of change of the friction coefficient of the 1000th reciprocating friction relative to the friction coefficient of the first reciprocating friction.

[0184] If the change rate of the friction coefficient is less than 5% after 1000 reciprocating frictions, the wear resistance grade is +++;

[0185] If the change rate of the friction coefficient is 10% to 30% after 1000 reciprocating frictions, the wear resistance grade is ++;

[0186] If the change rate of the friction coefficient is greater than 30% and does not exceed 50% after 1000 reciprocating frictions, the wear resistance grade is +;

[0187] If the rate of change of the friction coefficient is greater than 50% after 1000 reciprocating frictions, the wear resistance grade is -.

[0188] The test results of wear resistance are shown in Table 1.

[0189] 3. Surface energy

[0190] Test method: Use a commercially available blue oil-based marker to draw a blue line on the chute surface of Example 1, Example 2, Comparative Example 1, and Comparative Example 2, respectively. Observe the ink traces on the chute surface. Then, use the same method to draw a blue line on the untreated chute surface with a blue oil-based marker as a blank control. Qualitatively evaluate the surface energy based on the shrinkage of the blue ink line on the chute surface. The evaluation criteria are as follows:

[0191] If the blue ink shrinks into dots, the surface energy level is A;

[0192] If the blue ink shrinks into a dotted line, the surface energy level is B;

[0193] If the blue ink does not shrink at all and the blue ink on the chute surface basically forms a line, the surface energy grade is C;

[0194] If the blue ink does not shrink and continuous blue lines are formed on the surface of the slide, the surface energy grade is D.

[0195] Arranged from high to low in terms of surface energy, Grade D > Grade C > Grade B > Grade A.

[0196] FIG11 is a qualitative test diagram of the surface energy of the lubricating film layer of Example 1 of the present application. As can be seen from FIG11 , the blue ink on the surface of the lubricating film layer formed by vacuum evaporation of perfluoropolyether silane in Example 1 shrinks into dots, and the surface energy grade is A.

[0197] FIG12 is a qualitative test diagram of the surface energy of the lubricating film layer of Comparative Example 1 of the present application. As can be seen from FIG12 , the blue ink on the surface of the lubricating film layer formed by spraying polytetrafluoroethylene shrinks into a dotted line, and the surface energy grade is Class B;

[0198] FIG13 is a qualitative test diagram of the surface energy of the chute surface of Comparative Example 2 of the present application. As can be seen from FIG13 , after grease is applied to form a grease layer on the surface of the ceramic slide shaft and then rolled on the chute surface, the blue ink on the chute surface does not shrink substantially, forming a solid line, and the surface energy grade is C.

[0199] FIG14 is a qualitative test diagram of the surface energy of the chute surface without lubrication treatment. As can be seen from FIG14 , the blue ink on the chute surface without lubrication treatment does not shrink, forming a continuous blue solid line, and the surface energy level is D.

[0200] By comparing Figures 11 to 14, it can be seen that compared with the methods of applying perfluoropolyether lubricating grease, spraying polytetrafluoroethylene, etc., the lubricating film layer formed by vacuum evaporation of perfluoropolyether silane in the present application can significantly reduce the surface energy of the slide surface.

[0201] Table 1

[0202] The following conclusions can be drawn from Table 1:

[0203] 1) By comparing Examples 1 to 3, it can be seen that the temperature setting of the vacuum chamber mainly depends on the heat resistance of the chute material and the lubricating film layer material. Within the tolerance range of the chute material and the lubricating film layer material (25°C and 60°C), there is no significant effect on the lubrication performance and wear resistance of the prepared lubricating film layer. However, if the temperature of the vacuum chamber is set too high, reaching 100°C, the lubricating film layer material will evaporate, resulting in a decrease in lubrication performance.

[0204] 2) By comparing Example 1 and Examples 4 to 6, it can be seen that the friction reduction effect of K-type perfluoropolyether silane is greater than that of D-type perfluoropolyether silane and greater than that of Z-type perfluoropolyether silane and ≈ that of Y-type perfluoropolyether silane. The reason for this may be that as the number of fluorine atoms replaced increases, the surface energy is reduced to a greater extent, the volume of -CF3 is larger than that of -CF2-, the structure is more compact, and the surface energy reduction effect is better. Among them, K-type PFPE has the highest trifluoromethyl content, so its friction reduction effect is the best. In addition, the larger the molecular weight of the perfluoropolyether, the longer the fluorinated chain segment, the greater the coverage of the fluorinated chain segment on the film layer, the denser the surface arrangement, and the better the surface energy reduction effect. The molecular weight is D-type>Z-type≈Y-type. Therefore, the final friction reduction effect is K-type>D-type>Z-type≈Y-type.

[0205] 3) By comparing Example 1 with Example 7, it can be seen that the larger the particle size of silicon dioxide is, the worse the friction reduction effect is. The reason may be that the excessively large particle size leads to poor uniformity and density of the film layer, and does not utilize the reduction of surface energy.

[0206] 4) By comparing Example 1 and Examples 8 to 10, it can be seen that the greater the thickness of the second film layer (perfluoropolyether silane layer), the better the friction reduction effect. When the film thickness is 40 nm, the most excellent friction reduction effect can be obtained. When the film thickness continues to increase, the static friction coefficient and the dynamic friction coefficient no longer continue to decrease. The reason may be that when the thickness of the second film layer is relatively thin, it is difficult to cover the entire friction surface, and the friction reduction effect is poor. Excessive thickness will also lead to poor bonding between the first film layer and the second film layer, causing the second film layer to easily fall off.

[0207] 5) A comparison of Example 1 and Examples 11-13 shows that when there is no silica layer or the silica layer is too thin, there is no significant effect on friction performance, but the wear resistance of the second film layer is significantly reduced. When the silica layer thickness is increased, the wear resistance is further improved, but the friction reduction effect is also reduced. This may be because silica has excellent wear resistance, but when its thickness is too large, friction cannot be transmitted to the chute substrate and PFPE, and the PFPE loses its lubrication effect, and the friction between the substrate and silica is transferred. Silica itself has a high friction coefficient, which leads to a decrease in friction reduction effect.

[0208] 6) From the comparison between Example 1 and Example 14, it can be seen that when the thicknesses of the first film layer and the second film layer are both thin, it is not conducive to reducing the friction resistance and improving the wear resistance of the lubricating film layer.

[0209] 7) By comparing Example 1 with Examples 15 to 16, it can be seen that the lower the evaporation rate of perfluoropolyether silane, the better the wear resistance of the lubricating film layer, and the higher the evaporation rate of perfluoropolyether silane, the more conducive it is to reducing the friction resistance on the surface of the lubricating film layer. The reason may be that the evaporation rate mainly affects the uniformity and tightness of the film layer. The lower the evaporation rate, the higher the density of the film layer and the better the wear resistance. However, too close molecular arrangement is not conducive to maximizing the friction reduction performance.

[0210] 8) By comparing Example 1 and Examples 17 to 18, it can be seen that the lower the evaporation rate of silica, the denser the obtained silica layer, which is beneficial to improving the wear resistance. However, it will make it difficult for perfluoropolyether silane to penetrate, resulting in a worse friction reduction effect. If the silica evaporation rate continues to increase, the prepared silica layer will be too loose, resulting in a worse wear resistance of the lubricating film layer.

[0211] 9) By comparing Example 1 and Comparative Example 1, it can be seen that compared with the lubricating film layer using polytetrafluoroethylene prepared by spraying, the lubricating film layer obtained by vacuum evaporation of perfluoropolyether silane has lower static friction coefficient and dynamic friction coefficient.

[0212] 10) By comparing Example 1 and Comparative Example 2, it can be seen that the static friction coefficient and dynamic friction coefficient of the lubricating film layer prepared by applying lubricating grease are significantly higher than those of Example 1, and cannot effectively reduce the friction resistance of the motor.

[0213] In the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0214] In the description of the present application specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0215] In the description of this specification, the terms "first," "second," "third," "fourth," etc. (if any) are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0216] In the description of this application specification, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0217] In the description of the present application, the term "plurality" refers to two or more.

[0218] In the description of this application, the term "and / or" simply describes an association relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship; in a formula, the character " / " indicates that the related objects are in a "division" relationship.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor comprising a motor stator and a motor mover, characterized in that: The motor mover includes a slide groove and a sliding part at least partially located in the slide groove. The surface of the slide groove and / or the surface of the sliding part serves as a bonding surface. A lubricating film layer is provided on the bonding surface, and the composition of the lubricating film layer includes perfluoropolyether silane.

2. The motor according to claim 1, wherein The lubricating film layer includes a first film layer and a second film layer stacked together, wherein the first film layer is disposed on the surface of the bonding surface, and the second film layer is disposed on the surface of the first film layer; Wherein, the first film layer is a silicon dioxide layer, and the second film layer is a perfluoropolyether silane layer.

3. The motor according to claim 2, wherein: The thickness of the first film layer is 10-25 nm.

4. The motor according to claim 2, wherein: The thickness of the second film layer is 20-45 nm.

5. The motor according to claim 2, wherein: The D50 particle size of the silicon dioxide in the first film layer is 1 to 3 mm.

6. A method for preparing a motor according to any one of claims 1 to 5, characterized in that: The following steps are involved: Under vacuum conditions, a raw material including the perfluoropolyether silane is evaporated onto the bonding surface to form the lubricating film layer.

7. The preparation method according to claim 6, characterized in that The evaporation was carried out at 1.0×10 -3 ~3.0×10 -3 Pa under vacuum.

8. The preparation method according to claim 6 or 7, characterized in that The raw material further includes silicon dioxide, and the step of vapor-depositing the raw material including the perfluoropolyether silane on the bonding surface to form the lubricating film layer includes the following steps: Using a first evaporation source to heat the silicon dioxide to evaporate it into silicon dioxide gas molecules, and depositing the silicon dioxide gas molecules on the bonding surface to form a first film layer; heating the perfluoropolyether silane using a second evaporation source to evaporate it into perfluoropolyether silane gas molecules, and depositing the perfluoropolyether silane gas molecules on the surface of the first film layer to form a second film layer; The first film layer and the second film layer together constitute the lubricating film layer.

9. The preparation method according to claim 8, characterized in that The evaporation rate of the silicon dioxide is 10. The preparation method according to claim 8 or 9, characterized in that: The evaporation rate of the perfluoropolyether silane is 11. A camera assembly, characterized in that: The motor comprises the motor according to any one of claims 1 to 5.

12. An electronic device, characterized in that: Including the camera assembly described in claim 11.

Images