Motor component, driving motor and camera module

Abstract

The application provides a motor component, a driving motor and a camera module. The motor component is formed by a plurality of layers of material, and the material at the outermost layer is an isotropic liquid crystal polymer. The outer layer material and the inner layer material can be connected by a material such as a carbon nanotube. The outer layer of the motor component has good mechanical properties in different directions, and the outer layer material and the inner layer material are firmly connected. In the use process of the driving motor, when the forces in different directions act on the surface of the motor component, the motor component is not prone to damage phenomena such as chipping. The imaging quality of the camera module containing the driving motor is high and stable.

Description

Technical Field

[0001] This application relates to the field of terminal device hardware, specifically to a motor component, a drive motor, and a camera module. Background Technology

[0002] Camera modules with focusing, autofocus, or image stabilization functions typically use a drive motor to move lenses or imaging sensors within the module, achieving these functions. During this movement, the drive components can rub against and collide with other components in the lens module. Similarly, when an electronic device containing a camera module is dropped, friction and collisions may occur between the internal structural components of the camera module. These collisions and frictions can generate debris, which, if obstructing the propagation of imaging light (e.g., landing on the imaging sensor or filters), can cause problems such as black spots, affecting image quality.

[0003] How to reduce the probability of debris generation inside the camera module and improve the imaging quality of the camera module is a problem worth considering. Summary of the Invention

[0004] This application provides a motor component, a drive motor, and a camera module. The motor component is formed by a multi-layer composite material, with the outermost layer being an isotropic liquid crystal polymer. The outermost and inner layers are connected by materials such as carbon nanotubes. The outermost layer of the motor component exhibits good mechanical properties in different directions, and the connection between the outer and inner layers is strong. The drive motor using this motor component is less prone to chipping, and the camera module using this drive motor delivers high image quality.

[0005] In a first aspect, a motor component is provided, comprising: a first functional layer, a second functional layer, and a third functional layer, wherein the second functional layer is located between the first functional layer and the third functional layer, the first functional layer comprising a first liquid crystal polymer; a portion of the constituent material of the second functional layer is connected to the first functional layer and a portion is connected to the third functional layer; the third functional layer comprises a second liquid crystal polymer; wherein the tensile strength S1 of the first functional layer in a first direction and the tensile strength S2 in a second direction satisfy: |S1-S2| / (max{S1,S2})≤20%; and / or, the tensile modulus M1 of the first functional layer in the first direction and the tensile modulus M2 in the second direction satisfy: |M1-M2| / (max{M1,M2})≤20%; the first direction and the second direction are different.

[0006] In one possible implementation, both the first direction and the second direction are perpendicular to the thickness direction of the first functional layer, and the first direction and the second direction are perpendicular to each other.

[0007] It is understandable that the first direction and the second direction can represent any two different directions. When the first direction and the second direction are perpendicular to each other, the performance difference of the first functional layer in these two directions may be significant.

[0008] The difference in tensile strength and / or elastic modulus between any two different directions on the first functional layer is small, meaning that the first functional layer exhibits good mechanical properties in different directions. During collisions or friction, the first functional layer is not prone to shedding when forces from different directions are applied.

[0009] In a drive motor, the first functional layer of the motor components can be positioned facing other components of the drive motor to protect the third functional layer from impacts or friction. In some scenarios, the first functional layer can also be called a protective layer, the second functional layer can be called a damping layer, and the third functional layer can be called the main body of the motor components.

[0010] In one possible implementation, the third functional layer includes a surface layer and a core layer. The liquid crystal units of the second liquid crystal polymer located in the surface layer are arranged approximately perpendicular to the thickness direction of the third functional layer, while the liquid crystal units of the second liquid crystal polymer located in the core layer are randomly arranged. In another possible implementation, the molecular structures of the first and second liquid crystal polymers can be similar or identical. As an example, the first liquid crystal polymer can be liquid crystal polymer Lm1, and the second liquid crystal polymer can be liquid crystal polymer Lm2.

[0011] In some scenarios, the constituent material of the second functional layer can be referred to as a connecting material, which can be a carbon nanomaterial. As an example, the connecting material can be Bm1.

[0012] In one possible example, the motor components mentioned above can be components such as guide shafts, guide grooves, balls, ball tracks, sliders, and slide rails in a drive motor.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the first liquid crystal polymer is isotropic.

[0014] It is understandable that the isotropy of the first liquid crystal polymer is a macroscopic reflection of the random microscopic arrangement of the liquid crystal units of the first liquid crystal polymer. The isotropy of the first liquid crystal polymer can be understood as the first functional layer exhibiting relatively small differences in mechanical, optical, and thermal properties in different directions.

[0015] An isotropic first functional layer is located on the outer layer of the motor component. This first functional layer exhibits excellent mechanical properties in all directions and has a stable structure. During collisions or friction, the first functional layer is not prone to shedding when forces from different directions are applied. The second functional layer is partially connected to the first functional layer and partially connected to the third functional layer. The second functional layer enhances the strength of the connection between the first and third functional layers. Under external forces, the damping between the first and third functional layers is greater, making them less likely to separate. Consequently, the motor component is less likely to shed material due to separation between the different functional layers. Therefore, the probability of the motor component shedding material is significantly reduced.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the constituent material of the second functional layer is partially embedded in the first functional layer and partially embedded in the third functional layer; and / or, the constituent material of the second functional layer is partially chemically bonded to the first liquid crystal polymer and partially chemically bonded to the second liquid crystal polymer.

[0017] In one possible implementation, the constituent materials of the second functional layer may include one-dimensional nanomaterials, such as rods or tubes, and two-dimensional nanomaterials, such as sheets. Characterizing the microstructure of the motor component provided in this application using scanning electron microscopy, transmission electron microscopy, and other detection methods reveals that a portion of the rod-shaped, tubular, or sheet-shaped material can be located within the first functional layer, while another portion can be located within the third functional layer. Related details can be found in the following sections. Figure 7 , Figure 8 The content.

[0018] The constituent materials of the second functional layer can be connected to the first and third functional layers through physical embedding and / or chemical bonding. In this way, the second functional layer can more firmly connect the first and third functional layers, increase the damping characteristics between the two functional layers, and reduce the probability of phenomena such as shedding due to interlayer separation of the first and third functional layers under external force.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the second functional layer comprises carbon nanotubes and / or graphene oxide.

[0020] Carbon nanotubes and / or graphene oxide can both be embedded in liquid crystal polymers, and both nanomaterials have numerous active sites on their surfaces for chemical bonding with the liquid crystal polymers. These two materials exhibit good bonding properties and damping characteristics. Placing them at the interface between the first and third functional layers can increase the bonding strength between them, improve the energy absorption and vibration damping characteristics of motor components, and reduce damage under high-speed collisions and friction.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the maximum size of the carbon nanotube and the graphene oxide is less than or equal to 1 micrometer.

[0022] For carbon nanotubes, the maximum size can refer to their length; for graphene oxide, the maximum size can refer to the farthest distance between the edges of its sheet-like structure.

[0023] Smaller connecting materials are less likely to agglomerate, allowing them to be better dispersed on the contact surfaces of the first and third functional layers. This facilitates the connection between the connecting materials and the liquid crystal polymer, enhancing the connection strength between the first and third functional layers.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the constituent materials of the second functional layer are distributed on the interface where the first functional layer and the third functional layer contact.

[0025] In one possible implementation, the constituent materials of the second functional layer are uniformly distributed at the interface between the first and third functional layers. This allows for high connection strength between different regions of the first and third functional layers.

[0026] In conjunction with the first aspect, in some implementations of the first aspect, the areal density of the constituent material of the second functional layer is less than or equal to 70 micrograms per square meter.

[0027] When the first and second liquid crystal polymers are in contact, these two similar or identical materials can be fused together. If the areal density of the bonding material on the contact surface is high, it will hinder the contact between the two liquid crystal polymers, thus negatively impacting the bond strength between the first and third functional layers. Conversely, controlling the areal density of the bonding material on the contact surface to be as low as possible is beneficial for improving the bond strength between the first and third functional layers.

[0028] In conjunction with the first aspect, in some implementations of the first aspect, the maximum aggregate size of the constituent materials of the second functional layer is less than or equal to 10 micrometers.

[0029] Larger agglomerates may affect the bonding between the linker material and the liquid crystal polymer. By controlling the size of the agglomerates in the linker material to be as small as possible, the linker material can be more evenly dispersed on the contact interface between the first and third functional layers, and the linker material can make more sufficient contact with the liquid crystal polymer, which is beneficial to achieving the bonding strength between the first and third functional layers.

[0030] In conjunction with the first aspect, in some implementations of the first aspect, the difference between the melting point of the first liquid crystal polymer and the melting point of the second liquid crystal polymer is less than or equal to 30 degrees Celsius.

[0031] In one possible implementation, the difference between the melting point of the first liquid crystal polymer and the melting point of the second liquid crystal polymer is less than or equal to 10 degrees Celsius.

[0032] Using two liquid crystal polymers with similar melting points and processing them at the same temperature parameters, neither polymer is prone to molecular structural damage. This simplifies the manufacturing process of motor components and facilitates resin interfusion between the two polymers, enhancing their bonding strength.

[0033] In conjunction with the first aspect, in some implementations of the first aspect, the liquid crystal units of the first liquid crystal polymer and the liquid crystal units of the second liquid crystal polymer are the same, and / or, the flexible spacer groups of the first liquid crystal polymer and the flexible spacer groups of the second liquid crystal polymer are the same.

[0034] In conjunction with the first aspect, in some implementations of the first aspect, the thickness of the first functional layer is less than or equal to 100 micrometers.

[0035] When the thickness of the first functional layer is small, the thickness of the motor component does not change much compared to the motor component without the first functional layer, which is beneficial for controlling the size of the motor component and realizing the miniaturization of the drive motor.

[0036] In conjunction with the first aspect, in some implementations of the first aspect, the motor component further includes a fourth functional layer located on the side of the third functional layer opposite to the second functional layer, the fourth functional layer comprising a third liquid crystal polymer.

[0037] Both sides of the motor component are equipped with isotropic protective layers, so that when external force is applied to these two surfaces, the motor component is not prone to shedding or other phenomena.

[0038] In a second aspect, a drive motor is provided, including the motor components of the first aspect and any possible implementation thereof.

[0039] In one possible implementation, the drive motor can refer to a motor used to drive the image sensor and / or lens module, or it can refer to a motor used to achieve any of the functions of autofocus, optical image stabilization, or aperture adjustment. The aforementioned motor components can be guide shafts, guide grooves, balls, ball bearings, ball bearing tracks, sliders, slide rails, etc., within the drive motor.

[0040] In conjunction with the second aspect, in some implementations of the second aspect, the moving and / or stationary components of the drive motor include the motor components.

[0041] In conjunction with the second aspect, in some implementations of the second aspect, the first functional layer of the motor component includes a collision surface and / or a contact surface.

[0042] Thirdly, a camera module is provided, including an image sensor, a lens module, and a drive motor as described in the second aspect and any possible implementation thereof, the drive motor being used to drive the image sensor and / or the lens module.

[0043] Fourthly, an electronic device is provided, including a housing and a camera module as described in the third aspect and any possible implementation thereof, the camera module being fixedly connected to the housing.

[0044] Fifthly, a method for preparing a structural component is provided, the method comprising: using a first liquid crystal polymer as a raw material, preparing the main body of the structural component by injection molding; depositing a connecting material on the surface of the main body of the structural component; laying a second liquid crystal polymer on the surface of the main body of the structural component on which the connecting material is deposited; heating to a first temperature to melt the first liquid crystal polymer and the second liquid crystal polymer; maintaining the first temperature constant for a preset time and then cooling at a first cooling rate greater than or equal to 50 degrees Celsius per second.

[0045] In one possible implementation, during the stage of maintaining a constant first temperature for a preset time, a preset pressure (e.g., 0.2 MPa) can also be applied to the system.

[0046] During the stage of bonding the protective layer with the main structural component, controlling the cooling rate to be high enough can cause the liquid crystal polymer in the protective layer to form a random and irregular arrangement, thereby giving the protective layer isotropic physical properties.

[0047] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the difference between the first temperature and the melting point of the first liquid crystal polymer is greater than 0 and less than 50 degrees Celsius, and the difference between the first temperature and the melting point of the second liquid crystal polymer is greater than 0 and less than 50 degrees Celsius.

[0048] During the processing of liquid crystal polymers, excessively high processing temperatures can damage the molecular structure of the polymer, thereby affecting the strength, toughness, and other physical properties of the structural component. Furthermore, excessively high processing temperatures can increase the fluidity of the molten liquid crystal polymer, making it difficult to control the molding process of the structural component. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0050] Figure 2 This is a schematic diagram of the structure of a camera module provided in an embodiment of this application.

[0051] Figure 3 yes Figure 2 Another structural diagram of the camera module in the image.

[0052] Figure 4 This is a schematic diagram of a motor component provided in an embodiment of this application.

[0053] Figure 5 This is a schematic diagram of another motor component provided in an embodiment of this application.

[0054] Figure 6 This is a schematic diagram of the functional layer of a motor component provided in an embodiment of this application.

[0055] Figure 7 and Figure 8 This is a schematic diagram of the material bonding method within different functional layers of the motor component provided in the embodiments of this application.

[0056] Figure 9 This is a schematic diagram of another motor component provided in an embodiment of this application.

[0057] Figure 10 This is a schematic diagram of another motor component provided in an embodiment of this application.

[0058] Figure 11 This is a schematic diagram of the functional layer of another motor component provided in an embodiment of this application.

[0059] Figure 12 This is a schematic diagram of the shape of the motor component provided in the embodiment of this application.

[0060] Figure 13 This is a cross-sectional schematic diagram of a motor component provided in an embodiment of this application.

[0061] Figure 14 This is a schematic diagram of a method for manufacturing a motor component provided in an embodiment of this application.

[0062] Figure 15 This application provides an embodiment of the relationship between processing temperature, processing pressure, and time during the manufacturing process of a motor component.

[0063] Figure 16 This is a schematic diagram of the microstructure of the protective layer of the motor component.

[0064] Figure 17 These are the test results of the modulus in different directions on the protective layer of the motor components at room temperature.

[0065] Figure 18 These are the test results of the modulus in different directions on the protective layer of motor components at different temperatures.

[0066] Figure 19 This is a schematic diagram of the microstructure of the connecting material within the damping layer of a motor component.

[0067] Figure 20 These are schematic diagrams of two motor components provided in the embodiments of this application.

[0068] Figure 21 This is a schematic diagram of the test fixture for drop testing of motor components provided in the embodiments of this application.

[0069] Figure 22 This is the test result of the drop test of the motor component provided in the embodiment of this application. Detailed Implementation

[0070] The embodiments of this application are described in detail below, and examples of these embodiments are illustrated in the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0071] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. In the description of this application, it should be understood that the terms “center,” “longitudinal,” “lateral,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0072] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0073] Before formally introducing the embodiments of this application, some terms that may be used in the following examples will be explained:

[0074] Liquid crystal, or liquid crystal (LC), is a phase state. When a substance is in a molten state or dissolved in a solvent, it loses the rigidity of a solid and gains the fluidity of a liquid. It also retains some of the anisotropic ordered arrangement of molecules from the crystalline state, forming an intermediate state that combines some properties of crystals and liquids. This oriented, ordered fluid that exists during the transition from solid to liquid is called a liquid crystal.

[0075] Liquid crystal polymers (LCPs) are polymeric materials that can form liquid crystal states when molten or dissolved in a solvent. Liquid crystal units are the basic structural units that constitute LCP materials. Typically, liquid crystal units are rigid or semi-rigid structural segments retained after liquid crystal molecules are linked into macromolecular chains. For example, rod-shaped or plate-shaped aromatic ring structures form liquid crystal units through rigid connections (such as ester groups or imino groups). Liquid crystal units usually have rod-shaped, plate-shaped, or disc-shaped structures with an aspect ratio greater than 4. Intermolecular interactions are achieved through polar groups (such as -COO-, -N=N-) or flexible spacer chains (such as alkane chains), balancing order and fluidity. For example, benzene rings and aliphatic rings linked by trans-azo groups can form linear liquid crystal units.

[0076] Based on their position in the polymer chain, liquid crystal units can be classified into main chain liquid crystal units, side chain liquid crystal units, and mixed liquid crystal units.

[0077] Stick-slip friction is a type of motion in which objects slide against each other when in contact. The surfaces of two objects in contact alternately experience periods of rest and relative sliding. This phenomenon typically occurs between two solid surfaces when one surface attempts to move relative to the other. When the applied force gradually increases but is insufficient to immediately overcome the maximum static friction, the two surfaces will temporarily remain stationary; once the force exceeds the maximum static friction, the surfaces will suddenly begin to slide, at which point the frictional force decreases to the level of kinetic friction.

[0078] The pinning effect is the phenomenon in composite materials where some materials (such as fibers) are fixed or restricted in their movement near the interlayer interface. This effect can enhance the interfacial bonding strength of composite materials.

[0079] Isotropy refers to the property that the physical and chemical properties of an object do not change with different directions; that is, the performance values ​​measured in different directions are the same.

[0080] Figure 1A schematic structural diagram of an electronic device to which embodiments of this application are applicable is shown.

[0081] In this application, the electronic device involved is an electronic device with imaging capabilities, such as a mobile phone, personal digital assistant (PDA), tablet computer, laptop computer, camera, video recorder, smartwatch, smart bracelet, point of sale (POS) terminal, in-vehicle system, television (e.g., smart screen), wearable device, etc. This application does not impose any special limitations on the specific form of the electronic device. For ease of explanation and understanding, the following description uses a mobile phone as an example.

[0082] For example, Figure 1 The illustration in Figure 1-1 and indication Figure 1-2 The front and back of the electronic device 100 are schematically shown respectively. For example... Figure 1 As shown, the electronic device 100 may include a housing 101, a display panel (DP) 102, and a camera compact module (CCM) 103.

[0083] The housing 101 has a receiving space for accommodating the components of the electronic device 100. The housing 101 also serves to protect the electronic device 100 and support the entire device. The display screen 102 and the camera module 103 are disposed within the receiving space of the housing 101 and connected to the housing 101. In some embodiments, the housing 101 may include a back cover opposite to the display screen 102 and a mid-frame disposed between the back cover and the display screen 102; the display screen 102 and the camera module 103 may be fixed to the mid-frame. The housing 101 may be made of metal, plastic, ceramic, or glass, etc.

[0084] The display screen 102 is used to display images, such as images captured by the camera module 103. The display screen 102 can be a liquid crystal display (LCD) screen, an organic light-emitting diode (OLED) screen, etc. The display screen 102 can be a regular screen, or an irregularly shaped screen, a foldable screen, etc. The display screen 102 can be located on the front and / or back of the electronic device 100. Here, the front of the electronic device 100 can be understood as the side facing the user when using the electronic device 100, and the back of the electronic device 100 can be understood as the side facing away from the user when using the electronic device 100.

[0085] The camera module 103 is used to capture still images or videos. The camera module 103 can be disposed on the front and / or back of the electronic device 100. When the camera module 103 is disposed on the front of the electronic device 100, it can be used to capture images of the scene located on one side of the front of the electronic device 100; in some embodiments, this can be referred to as a front-facing camera. When the camera module 103 is disposed on the back of the electronic device 100, it can be used to capture images of the scene located on one side of the back of the electronic device 100; in some embodiments, this can be referred to as a rear-facing camera. During shooting, the user can select the appropriate camera module according to their shooting needs. In some embodiments, when the display screen 102 can be folded, the camera module 103 can function as either a front-facing camera or a rear-facing camera as the display screen 102 folds. It is understood that the placement of the camera module 103 can be determined according to actual needs. Figure 1 The installation locations shown are merely illustrative.

[0086] In some embodiments, the camera module 103 can be a vertical module or a folding module (or periscope camera module). A vertical camera module can be understood as light entering the camera module directly hitting the image sensor without bending the light path. A folding camera module can be understood as light entering the camera module needing to pass through optical elements such as reflectors, lenses, and prisms before hitting the image sensor, resulting in a folded light path.

[0087] In some embodiments, the camera module 103 may be a telephoto module, a wide-angle module, an ultra-wide-angle module, or a depth-of-field module.

[0088] This application embodiment does not limit the number of camera modules 103; it can be one, two, four, or even more. For example, one or more camera modules 103 can be set on the front of the electronic device 100, and / or one or more camera modules 103 can be set on the back of the electronic device 100. When multiple camera modules 103 are set, they can be identical or different. For example, the multiple camera modules 103 may have different lens optical parameters, different lens placement positions, or different lens shapes. This application embodiment also does not limit the relative positions of the multiple camera modules. For example, one or more of the multiple camera modules 103 can serve as the main camera module. Typically, the main camera module is responsible for the main shooting task, usually has the highest pixel count, and can provide higher resolution and a stronger sensor, thereby meeting the user's photography needs in different scenarios.

[0089] In some embodiments, the electronic device 100 may further include a protective lens 104 for protecting the camera module 103. The protective lens 104 is disposed on the housing 101 and covers the camera module 103. For example, when the protective lens 104 is used to protect the front-facing camera, the protective lens 104 may cover only the front-facing camera module or cover the entire front of the electronic device 100. When the protective lens 104 covers the entire front of the electronic device 100, it can also be used to protect the display screen 102, in which case the protective lens 104 is the cover glass (CG). As another example, when the protective lens 104 is used to protect the rear-facing camera, the protective lens 104 may cover the entire back of the electronic device 100, or it may be disposed only at the position corresponding to the rear-facing camera module.

[0090] In some embodiments, the protective lens 104 may be made of glass, sapphire, ceramic, etc., and this application does not impose any special limitations on it. For example, the protective lens 104 is transparent, and light from outside the electronic device 100 can enter the camera module 103 through the protective lens 104.

[0091] It should be understood that Figure 1 The structure shown in the diagram does not constitute a specific limitation on the electronic device 100. The electronic device 100 may include more or fewer components than shown in the diagram. For example, the electronic device 100 may also include one or more of the following components: battery, flash, earpiece, buttons, sensors, etc. The electronic device 100 may also have a different component arrangement than shown in the diagram.

[0092] Figure 2 and Figure 3 A schematic diagram of the structure of a camera module provided in an embodiment of this application is shown. Figure 2 This is a schematic exploded view of camera module 200. Figure 3 This is a schematic cross-sectional view of the camera module 200. Figure 2 The camera module 200 in the middle can be Figure 1 An exemplary structure of the camera module 103 is shown below. (The following is in conjunction with...) Figure 2 and Figure 3 A brief introduction to the structure of camera module 200.

[0093] like Figure 2 and Figure 3 As shown, the camera module 200 may include a housing 210, a lens assembly 220, and a light sensing assembly 240.

[0094] The housing 210 has a receiving space for accommodating the lens assembly 220 and the light sensing assembly 240, etc. Additionally, the housing 210 also serves a protective and supporting function. It is understandable that... Figure 2 and Figure 3The structure of the housing 210 shown is merely exemplary and does not limit the scope of this application. Those skilled in the art can design the shape of the housing 210 according to actual needs.

[0095] The lens assembly 220 mainly includes a lens group 221 and a lens barrel 222, wherein the lens group 221 is housed within the receiving space formed by the lens barrel 222. The lens assembly 220 is used to image the scene on the object side onto the image plane on the image side. In some embodiments, the lens assembly 220 can also perform certain processing on the received imaging beam, such as aberration correction and chromatic aberration elimination. Here, the imaging beam refers to the beam formed by the light incident on the camera module 200.

[0096] Lens group 221 may include at least one lens (or lens element). The at least one lens may be different or at least partially the same. This application embodiment does not specifically limit the number of lenses included in lens group 221. Those skilled in the art can set the number of lenses according to actual needs, such as 1, 2, 3, 5, 8 or more.

[0097] The focal length of lens group 221 can be fixed, and correspondingly, lens assembly 220 is a prime lens. Alternatively, the focal length of lens group 221 can be adjusted, and correspondingly, lens assembly 220 is a zoom lens. For example, the focal length of lens group 221 can be adjusted by changing the relative positions of the lenses within it.

[0098] The lens barrel 222 has a receiving space, primarily for accommodating the lens assembly 221. In some embodiments, the lens barrel 222 can be a single unit, with the lens assembly 221 housed within this single unit. In other embodiments, the lens barrel 222 may also comprise multiple lens barrel sections, with the lens groups of the lens assembly 221 disposed within these multiple lens barrel sections, wherein each lens barrel section and the lenses housed therein can be referred to as a lens group. Exemplarily, the relative positions between these multiple lens barrel sections can be adjusted, enabling optical zoom by adjusting the relative positions of the lenses.

[0099] Understandable. Figure 2 and Figure 3 The structure of the lens barrel 222 and the connection method between the lens group 221 and the lens barrel 222 are merely exemplary and do not limit the embodiments of this application.

[0100] In some examples, the camera module 200 may also include a lens actuator 230 for moving the lens assembly 220 to achieve autofocus and / or optical image stabilization. In some embodiments, the lens actuator 230 may also be referred to as a lens motor.

[0101] like Figure 3As shown, the lens assembly actuator 230 may include a motor for moving the lens assembly 220 for autofocus (hereinafter referred to as AF motor 231 for ease of description) and / or a motor for moving the lens assembly 220 for optical image stabilization (hereinafter referred to as OIS motor 232 for ease of description). Specifically, the AF motor 231 is used to move the lens assembly 220 for autofocus in the Z direction, and the OIS motor 232 is used to move the lens assembly 220 for optical image stabilization in the X and / or Y directions.

[0102] In some embodiments, the AF motor 231 and the OIS motor 232 can be two independent components, each independently driving the lens assembly 220 for autofocus and optical image stabilization. Alternatively, the AF motor 231 and the OIS motor 232 can be integrated into one unit, with a single motor driving the lens assembly 220 for autofocus and optical image stabilization. Figure 3 The lens assembly actuator 230 is illustrated by way of separate AF motor 231 and OIS motor 232, but it should be understood that the embodiments of this application are not limited thereto.

[0103] In some embodiments, the AF motor 231 or the OIS motor 232 can be used to move the entire lens assembly 220, or to move a portion of the lens assembly 220. For example, if a portion of the lens assembly 220 (such as the first lens group) is relatively fixed and another portion (such as the second lens group) is movable, the AF motor 231 or the OIS motor 232 can drive the movable portion to move, thereby changing the optical path to achieve the desired function.

[0104] For example, such as Figure 3 As shown, the AF motor 231 is connected to the lens barrel 222 in the lens assembly 220. During autofocus, the AF motor 231 can drive the lens barrel 222 to move along the optical axis (i.e., the Z-axis), thereby changing the distance from the optical center of the lens group 221 to the imaging plane (i.e., changing the image distance) to obtain a sharp image. It should be understood that the figure only schematically shows the location of the AF motor 231 and does not impose any limitations on the specific structure of the AF motor 231.

[0105] For example, such as Figure 3 As shown, the OIS motor 232 is connected to the lens barrel 222 in the lens assembly 220. During optical image stabilization, the OIS motor 232 can drive the lens barrel 222 to move along the direction perpendicular to the optical axis (i.e., the X and / or Y directions), thereby causing the focus of the lens group 221 to deviate from the optical axis to obtain a sharp image. It should be understood that the figure only schematically shows the location of the OIS motor 232 and does not impose any limitations on the specific structure of the OIS motor 232.

[0106] As a implementation, the aforementioned AF motor 231 can be a voice coil motor (VCM), a shape memory alloy (SMA) motor, a stepping motor, a piezoelectric motor, etc. It should be understood that the specific structure of the mirror assembly AF motor 231 can be designed and selected according to the chosen driving method, and will not be described in detail in the embodiments of this application.

[0107] As a result, the aforementioned OIS motor 232 can be a voice coil motor, a shape memory alloy motor, a stepper motor, a piezoelectric motor, etc. It should be understood that the specific structure of the lens assembly OIS motor 232 can be designed and selected according to the chosen driving method, and will not be described in detail in the embodiments of this application.

[0108] It is understandable that during the mechanical movement of the AF motor 231 or the OIS motor 232, collisions and / or friction may occur between their respective stators and movers.

[0109] In some examples, the lens actuator 230 may also include one or more displacement sensors that can be used to detect movement of the lens assembly 220 during autofocus, thereby achieving more accurate autofocus; and / or, the displacement sensor may also be used to detect movement of the lens assembly 220 during optical image stabilization, thereby achieving more accurate optical image stabilization.

[0110] The light sensing component 240 is disposed on the rear side of the lens assembly 220 and is mainly used for imaging. For example, the light sensing component 240 may include a filter 241, an image sensor 242, a circuit board 244, etc.

[0111] A filter 241 is disposed on the light-sensing assembly 240 on the side near the lens assembly 220. The filter 241 is used to eliminate unwanted light projected onto the image sensor 242, preventing problems such as ghosting, stray light, and color cast from occurring during image formation. The filter 241 can be an infrared cut-off filter or a filter that filters out other light bands.

[0112] An image sensor 242 is disposed on top of and directly or indirectly connected to a MEMS actuator 243. The image sensor 242 can move along the optical axis and / or perpendicular to the optical axis under the actuation of the MEMS actuator 243. The image sensor 242 is a semiconductor chip whose surface contains hundreds of thousands to millions of photodiodes. When illuminated, it generates an electric charge, which is converted into a digital signal by an analog-to-digital converter chip. The image sensor 242 can be a charge-coupled device (CCD) image sensor or a complementary metal-oxide-semiconductor (CMOS) image sensor.

[0113] In some examples, the light-sensing component 240 may also include a microelectromechanical systems (MEMS) actuator 243, also referred to as a MEMS motor, for driving the image sensor 242 to achieve autofocus and / or optical image stabilization. Specifically, during autofocus, the MEMS motor 243 can drive the image sensor 242 to move up and down along the optical axis; during optical image stabilization, the MEMS motor 243 can drive the image sensor 242 to move in a direction perpendicular to the optical axis. The MEMS actuator 243 includes a mover and a stator (not shown), wherein the stator is fixed relative to the housing 210, and the mover is movable relative to the stator. During autofocus and optical image stabilization, specifically, the mover of the MEMS actuator 243 drives the image sensor 242 to move.

[0114] MEMS actuator 243 can be used to drive image sensor 242 to move along the optical axis for autofocus, or to drive image sensor 242 to move perpendicular to the optical axis for optical image stabilization. In other words, MEMS actuator 243 can be used to drive image sensor 242 to move along a target direction, where the target direction includes the optical axis and / or the direction perpendicular to the optical axis.

[0115] The MEMS actuator 243 can be driven by electrostatic force, magnetoelectric force, piezoelectric force, thermoelectric force, etc. It should be understood that those skilled in the art can design the structure of the mover and stator of the MEMS actuator 243 according to the selected driving method, which will not be described in detail here.

[0116] It is understandable that during the process of the MEMS brake 243 driving the image sensor 242 to move, collisions and / or friction may occur between the mover and stator inside the MEMS brake 243.

[0117] In some examples, the MEMS actuator 243 may also include one or more displacement sensors that can be used to detect movement of the image sensor 242 during autofocus, thereby achieving more accurate autofocus; and / or, the displacement sensor may also be used to detect movement of the image sensor 242 during optical image stabilization, thereby achieving more accurate optical image stabilization.

[0118] The circuit board 244 is used to transmit electrical signals and can be a flexible printed circuit (FPC) or a printed circuit board (PCB). The FPC can be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid-flexible board, or a flexible circuit board with a hybrid structure, etc., and the embodiments of this application are not limited thereto.

[0119] The image sensor 242 can be electrically connected to the circuit board 244 via wires, such as live gold wires, to extract signals.

[0120] In some examples, the image sensor 242 can be directly or indirectly connected to the MEMS actuator 243, so that by driving the MEMS actuator 243, the image sensor 242 can be moved, thereby achieving autofocus or optical image stabilization.

[0121] In some scenarios, the aforementioned lens assembly 220, light sensing assembly 240, image sensor 242, etc., can all be regarded as optical elements.

[0122] It should be understood that Figure 2 and Figure 3 The illustrated structure does not constitute a specific limitation on the camera module 200. The camera module 200 may include more or fewer components than shown. For example, the camera module 200 may include an aperture assembly for adjusting the amount of light entering the camera, without including the aforementioned housing 210. This aperture assembly may include multiple blades arranged in a ring to form a light-entry aperture through which light passes. The size of the light-entry aperture is adjusted by driving the multiple blades to change the amount of light entering the camera. As another example, the camera module 200 may also include connectors and peripheral electronic components. Similar details are not elaborated here.

[0123] It is understandable that during the process of adjusting the size of the light-gathering aperture, collisions and / or friction may occur between the stator and mover of the aperture assembly.

[0124] In applications such as optical image stabilization, autofocus, and aperture adjustment, as well as in scenarios where electronic device 100 is bumped or dropped, collisions or friction may occur between two structural components that are close to each other in camera module 200. During the collision or friction process, the structural components may wear down or be damaged, generating particles (i.e., shedding). If these particles fall on the propagation path of the imaging light, they will affect the propagation of the imaging light and affect the imaging quality of camera module 200.

[0125] like Figure 4 The image shows a structural member 1 provided in an embodiment of this application. The structural member 1 may include components along its thickness direction (…). Figure 4 Functional layers 6-1, 6-2, and 6-3 are stacked sequentially along the Z-axis direction of the structural component 1. Functional layers 6-1 and 6-3 are located on the outside of structural component 1, and functional layer 6-2 is located between functional layers 6-1 and 6-2.

[0126] In some scenarios, functional layers 6-1 and 6-3 can be referred to as the surface layer of structural component 1, and functional layer 6-2 can be referred to as the core layer of structural component 1.

[0127] Structural component 1 can be a one-piece molded structure, or functional layers 6-1, 6-2 and 6-3 can be formed after undergoing the same processing technology (such as injection molding).

[0128] In one possible implementation, structural component 1 includes a liquid crystal polymer Lm0, which includes liquid crystal elements U0. Specifically, functional layers 6-1, 6-2, and 6-3 all include liquid crystal elements U0. It is possible that the liquid crystal elements U0 are arranged differently in functional layers 6-1, 6-2, or 6-3.

[0129] For example, the liquid crystal elements U0 are arranged in a specific orientation in functional layers 6-1 and 6-3, while the liquid crystal elements U0 are arranged in functional layer 6-2 without a specific orientation. For instance, in functional layers 6-1 and 6-3, the arrangement direction of the liquid crystal elements U0 is approximately perpendicular to the thickness direction of the structural member 1; in functional layer 6-2, the liquid crystal elements U0 are arranged in a generally random manner.

[0130] Based on the arrangement of the liquid crystal unit U0, in terms of macroscopic performance, functional layers 6-1 and 6-3 are roughly anisotropic, while sub-functional layer 6-2 is roughly isotropic.

[0131] In some examples, structural component 1 can be positioned opposite structural component SC, and collisions and / or friction may occur between the two structural components.

[0132] As an example, during a collision, the direction of the interaction forces between the two structural components (hereinafter referred to as the collision direction) can be... Figure 4 The directions are D1, D2, or D3, etc. Taking the thickness direction of structural component 1 as a reference, the angle between the aforementioned collision direction and the thickness direction of structural component 1 can be less than or equal to θ. That is, the collision direction and... Figure 4 The included angle along the Z-axis is greater than or equal to 0° and less than or equal to θ. For example, the angle θ can be 2°, 5°, 10°, etc.

[0133] As an example, during the friction process, the direction of the interaction force between these two structural components (hereinafter referred to as the friction direction) can be... Figure 4 The direction of friction, such as D4, is considered. Taking the thickness direction of structural component 1 as a reference, the aforementioned friction direction can be perpendicular to the thickness direction of structural component 1. It is understood that the friction direction can be any direction within the contact surface of the two structural components.

[0134] Whether during a collision or friction process, forces from multiple directions can act on the surface of structural component 1. As previously explained, the surface of structural component 1 lies on functional layers 6-1 and 6-3, which exhibit anisotropy in macroscopic properties. In other words, during a collision or friction process, for forces acting in multiple different directions, there exists a force acting in one direction that may be weaker in terms of physical properties such as strength and hardness of functional layer 6-1 (or functional layer 6-3). This could potentially damage structural component 1, causing chipping and affecting the imaging quality of the camera module.

[0135] In order to reduce the probability of chipping caused by collision (and / or friction) of the above-mentioned structural component 1, solve the imaging quality problems such as black spots and shadows caused by chipping, and improve the imaging quality and stability of the camera module, this application provides a structural component 10. The structural component 10 can be applied in the camera module 200, and is especially suitable as a component in the camera module 200 that is prone to collision and / or friction, such as a structural component that makes up the stator and / or mover of the drive motor.

[0136] Here, the drive motor can refer to a motor used to drive the image sensor and / or lens module, or it can refer to a motor used to achieve any of the functions of autofocus, optical image stabilization, or aperture adjustment.

[0137] As an example, the aforementioned structural component 10 may include guide shafts, guide grooves, balls, ball tracks, sliders, slide rails, and other guiding structures applied in the camera module 200.

[0138] When the structural component 10 is applied to the drive motor of the camera module 200, the structural component 10 can also be referred to as a motor component.

[0139] The structural component 10 provided in this embodiment is a composite layered structure, and the side of the structural component 10 subjected to impact (and / or friction, etc.) has good mechanical properties, with minimal performance differences in different directions. Under impact (and / or friction, etc.) from different directions, the structural component 10 exhibits good structural stability and is not prone to wear, chipping, or other defects. Camera modules using this structural component 10 are less likely to experience image performance degradation due to chipping, dust, etc., resulting in higher and more stable image quality.

[0140] like Figure 5 The image shows a structural component 10a provided in an embodiment of this application. This structural component 10a can be considered as an example of the aforementioned structural component 10. The structural component 10a may include a first functional layer 12, a second functional layer 14, and a third functional layer 16. These three functional layers can be arranged along the thickness direction of the structural component 10a. Figure 5 The layers are stacked in the Z-axis direction, and the second functional layer 14 is located between the first functional layer 12 and the third functional layer 16.

[0141] Structural component 10a can be positioned opposite structural component SC (not shown in the figure), and collisions and / or friction may occur between these two structural components. During the collision and / or friction process, multiple forces in different directions can act on structural component 10a; relevant details can be found in the preceding text. Figure 4 Explanation.

[0142] In some examples, the third functional layer 16 can form the main body of the structural member 10a, the first functional layer 12 can be used to protect the main body of the structural member 10a, and the second functional layer 14 located between the two can be used to improve the strength of the connection between the first functional layer 12 and the third functional layer 16.

[0143] For example, the first functional layer 12 may be disposed close to the structural member SC, and the third functional layer 16 may be disposed away from the structural member SC. Collisions and / or friction between the structural member 10a and the structural member SC occur on the first functional layer 12. Figure 5 As shown, the side of the first functional layer 12 away from the third functional layer 16 (i.e., the side closer to the structural member SC) may include an action surface 12-1, which can come into contact with the structural member SC in the event of collision (and / or friction, etc.). It is understood that the action surface 12-1 can be either a collision surface or a contact surface.

[0144] It should be understood that structural component SC is only used to provide supplementary explanation of structural component 10a, and the relevant explanations of structural component SC should not be regarded as a limitation on structural component 10a.

[0145] In some scenarios, the first functional layer 12 can also be called the protective layer, the second functional layer 14 can also be called the damping layer, and the third functional layer 16 can also be called the main body of the structural component.

[0146] In some examples, the first functional layer 12 may include a liquid crystal polymer Lm1, which includes liquid crystal elements U1. The liquid crystal elements U1 may be randomly distributed in the liquid crystal polymer Lm1. In other words, the arrangement of the liquid crystal elements U1 in the liquid crystal polymer Lm1 has no specific orientation.

[0147] The randomly distributed liquid crystal building blocks U1 enable the liquid crystal polymer Lm1 to exhibit good isotropy on a macroscopic scale. For example, the mechanical and optical properties of liquid crystal polymer Lm1 also exhibit good isotropy. The properties of liquid crystal polymer Lm1 will be described in detail in the structural component fabrication section below, and will not be elaborated upon here.

[0148] In some examples, the difference rate of mechanical properties in two mutually perpendicular directions of the first functional layer 12 can be less than or equal to a preset ratio.

[0149] For example, the tensile strength of the first functional layer 12 in the first direction is S1, and the tensile strength in the second direction is S2. Both the first and second directions are perpendicular to the thickness direction of the structural member 10a, and the first and second directions are perpendicular to each other. The tensile strengths S1 and S2 satisfy the following conditions:

[0150] |S1-S2| / (max{S1,S2})≤p1;

[0151] Where max{S1,S2} represents the larger of S1 and S2, and p1 can represent the preset ratio mentioned above. For example, p1 can take values ​​such as 5%, 10%, 15%, 20%, etc.

[0152] For example, the elastic modulus of the first functional layer 12 in the first direction is M1, and the elastic modulus in the second direction is M2. Both the first and second directions are perpendicular to the thickness direction of the structural member 10a, and the first and second directions are perpendicular to each other. The elastic modulus M1 and the elastic modulus M2 satisfy the following condition:

[0153] |M1-M2| / (max{M1,M2})≤p2;

[0154] Where max{M1,M2} represents the larger of M1 and M2, and p2 can represent the preset ratio mentioned above. For example, p2 can take values ​​such as 5%, 10%, 15%, 20%, etc.

[0155] For example, the first functional layer 12 has a refractive index of n1 in a first direction and a refractive index of n2 in a second direction. Both the first and second directions are perpendicular to the thickness direction of the structural member 10a, and the first and second directions are perpendicular to each other. The refractive indices n1 and n2 satisfy the following condition:

[0156] |n1-n2| / (max{n1,n2})≤p3;

[0157] Where max{n1,n2} represents the larger of n1 and n2, and p3 can represent the preset ratio mentioned above. For example, p3 can take values ​​such as 5%, 10%, 15%, 20%, etc.

[0158] It is understood that the differences in tensile strength, elastic modulus, and refractive index of the first functional layer 12 in different directions are merely one way to represent the isotropy of the first functional layer 12. In some other examples, the isotropy of the first functional layer 12 can also be reflected by electrical properties such as conductivity, thermal properties such as thermal conductivity, etc., and this application does not impose any limitations on this.

[0159] The liquid crystal units U1 of the liquid crystal polymer Lm1 in the first functional layer 12 are randomly arranged. For external forces acting in different directions, the first functional layer 12 can exhibit good mechanical properties (such as hardness, elastic modulus, impact resistance, etc.) in the direction of the external force. In this way, when the structural component 10a is subjected to collision (and / or friction, etc.), the probability of the structural component 10a being damaged or shedding is smaller, and fewer dust particles will block the imaging light of the camera module, resulting in higher imaging quality of the camera module.

[0160] In some examples, the molecular structure of the liquid crystal molecules in the liquid crystal polymer Lm1 can be:

[0161]

[0162] R1 and R1′ are polar or polarizable groups (such as amino, cyano, halogen, nitro, etc.), and -X1- can be -CH-, -COO-, -N=N-, -CH=CR-, -N=O, -O-, etc. It can be the aforementioned liquid crystal element U1.

[0163] In addition to the liquid crystal unit U1, the liquid crystal polymer Lm1 may also include a flexible spacer group C1, which can be used to connect two adjacent liquid crystal units U1. The flexible spacer group C1 can be composed of short aliphatic chains, which can increase the flexibility of the liquid crystal polymer molecules and adjust the distance and relative position between the liquid crystal units U1. The flexible spacer group C1 can affect the thermal stability, flowability, hardness and brittleness of the liquid crystal polymer Lm1 to a certain extent.

[0164] The embodiments of this application do not limit the thickness of the first functional layer 12. In some examples, the thickness of the first functional layer 12 may be less than or equal to a first thickness threshold, which, for example, may be 100 micrometers. Thus, the thickness of the first functional layer 12 may be 90 micrometers, 70 micrometers, 50 micrometers, 30 micrometers, 10 micrometers, etc.

[0165] With a relatively small thickness of the first functional layer 12, the thickness of the structural component 10 does not change much compared to the structural component 1 without the first functional layer 12, which is beneficial for controlling the volume of the structural component 10 and realizing the miniaturization of the drive motor.

[0166] In some examples, the third functional layer 16 may include a thickness direction along the third functional layer 16. Figure 5 The sub-functional layers 16-1, 16-2, and 16-3 are stacked sequentially along the Z-axis direction. Sub-functional layer 16-1 is located on the side of the third functional layer 16 closer to the first functional layer 12, and sub-functional layer 16-3 is located on the side of the third functional layer 16 away from the first functional layer 12.

[0167] In some scenarios, sub-functional layers 16-1 and 16-3 can be referred to as the surface layer of the third functional layer 16, and sub-functional layer 16-2 can be referred to as the core layer of the third functional layer 16.

[0168] The third functional layer 16 can be a one-piece structure, or the sub-functional layers 16-1, 16-2 and 16-3 can be formed after undergoing the same processing technology (such as injection molding).

[0169] In one possible implementation, the third functional layer 16 includes a liquid crystal polymer Lm2, which includes liquid crystal elements U2. Specifically, sub-functional layers 16-1, 16-2, and 16-3 all include liquid crystal elements U2. In one possible scenario, the arrangement of liquid crystal elements U2 in sub-functional layers 16-1, 16-2, or 16-3 may differ.

[0170] For example, the liquid crystal cells U2 are arranged in a specific orientation in sub-functional layers 16-1 and 16-3, while the liquid crystal cells U2 are arranged in sub-functional layer 16-2 without a specific orientation. For instance, in sub-functional layers 16-1 and 16-3, the arrangement direction of the liquid crystal cells U2 is approximately perpendicular to the thickness direction of the third functional layer 16; in sub-functional layer 16-2, the liquid crystal cells U2 are arranged in a generally random manner.

[0171] Based on the arrangement of the liquid crystal unit U2, in terms of macroscopic performance, sub-functional layers 16-1 and 16-3 are roughly anisotropic, while sub-functional layer 16-2 is roughly isotropic.

[0172] In some examples, the molecular structure of the liquid crystal molecules in the liquid crystal polymer Lm2 can be:

[0173]

[0174] R2 and R′2 are polar or polarizable groups (such as amino, cyano, halogen, nitro, etc.), and -X2- can be -CH-, -COO-, -N=N-, -CH=CR-, -N=O, -O-, etc. It can be the aforementioned liquid crystal element U2.

[0175] In addition to the liquid crystal unit U2, the liquid crystal polymer Lm2 may also include a flexible spacer group C2, which can be used to connect two adjacent liquid crystal units U2. The flexible spacer group C2 can be composed of short aliphatic chains, which can increase the flexibility of the liquid crystal polymer molecules and adjust the distance and relative position between the liquid crystal units U2. The flexible spacer group C2 can affect the thermal stability, flowability, hardness and brittleness of the liquid crystal polymer Lm2 to a certain extent.

[0176] In some examples, the material compositions of the first functional layer 12 and the third functional layer 16 may be the same or similar. Alternatively, the molecular structures of the liquid crystal polymer Lm1 and the liquid crystal polymer Lm2 may be the same or similar.

[0177] For example, the liquid crystal unit U1 of liquid crystal polymer Lm1 and the liquid crystal unit U2 of liquid crystal polymer Lm2 are the same or similar. And / or, the flexible spacer group C1 of liquid crystal polymer Lm1 and the flexible spacer group C2 of liquid crystal polymer Lm2 may be the same or similar.

[0178] For example, the group R1 in the molecular structure of liquid crystal polymer Lm1 can be the same as or similar to the group R2 in the molecular structure of liquid crystal polymer Lm2. For example, both group R1 and group R2 can be -NH2 or -CN. Another example is that group R1 can be -NH-CH3 and group R2 can be -NH2. Yet another example is that group R1 can be -Cl and group R2 can be -Br.

[0179] For example, the group R1′ in the molecular structure of liquid crystal polymer Lm1 can be the same as or similar to the group R′2 in the molecular structure of liquid crystal polymer Lm2. For example, both group R1′ and group R′2 can be -NH2 or -CN. For example, group R1′ can be -NH-CH3, and group R′2 can be -NH2. For example, group R1′ can be -Cl, and group R′2 can be -Br.

[0180] For example, group X1 in the molecular structure of liquid crystal polymer Lm1 can be the same as or similar to group X2 in the molecular structure of liquid crystal polymer Lm2. For example, both group X1 and group X2 can be -O-. For another example, group X1 can be -CH=CH- and group X2 can be -CH=C(CH3)-. For yet another example, group X1 can be -CH2- and group X2 can be -CH(CH3)-.

[0181] For example, the difference between the melting point of liquid crystal polymer Lm1 and the melting point of liquid crystal polymer Lm2 can be less than or equal to a temperature difference threshold, which can be 50°C, 40°C, 30°C, 20°C, 10°C, etc.

[0182] Using two liquid crystal polymers with similar melting points and processing them at the same temperature parameters, neither polymer is prone to molecular structural damage. This simplifies the manufacturing process and facilitates resin interfusion between the two polymers, enhancing their bonding strength.

[0183] In some examples, the second functional layer 14 may include a connecting material Bm1, which may be partially connected to the liquid crystal polymer Lm1 and partially connected to the liquid crystal polymer Lm2. The connection between the connecting material Bm1 and the liquid crystal polymer Lm1 (or liquid crystal polymer Lm2) may be a physical connection and / or a chemical bond. Alternatively, the connecting material Bm1 may be partially embedded in the liquid crystal polymer Lm1 and partially embedded in the liquid crystal polymer Lm2; and / or, the connecting material Bm1 may form a chemical bond with the liquid crystal polymer Lm1 and a chemical bond with the liquid crystal polymer Lm2.

[0184] For example, the connecting material Bm1 can be a one-dimensional material, such as a rod or a tube, or a two-dimensional material, such as a sheet.

[0185] For example, the connecting material Bm1 can be one or more of carbon nanotubes (CNTs), carbon nitride nanotubes, metal oxide / sulfide nanotubes, silicon carbide nanotubes, etc.

[0186] Taking carbon nanotubes as an example, one end of a one-dimensional material can be embedded in a liquid crystal polymer Lm1, and the other end can be embedded in a liquid crystal polymer Lm2, thereby forming a pinning effect, enhancing the connection between liquid crystal polymers Lm1 and Lm2, and enhancing the connection between the first functional layer 12 and the third functional layer 16.

[0187] For example, the connecting material Bm1 can be one or more of graphene, graphene oxide, titanium dioxide nitrogen atomic layer nanosheets, hexagonal boron nitride, silicon nanosheets, etc.

[0188] The surface of two-dimensional materials, such as graphene oxide, contains abundant active sites. These active sites can chemically react with liquid crystal polymer Lm1 (and / or liquid crystal polymer Lm2) to form chemical bonds, thereby enhancing the connection between liquid crystal polymer Lm1 and liquid crystal polymer Lm2, and enhancing the connection between the first functional layer 12 and the third functional layer 16.

[0189] It is understood that the surface of the aforementioned one-dimensional material may also include active sites, which may form chemical bonds with liquid crystal polymers Lm1 and / or Lm2. The aforementioned two-dimensional material may also be partially embedded in liquid crystal polymer Lm1 and partially embedded in liquid crystal polymer Lm2.

[0190] Nanomaterials such as carbon nanotubes and sheet graphene oxide have good connectivity and damping properties. Placing these materials at the contact interface between the first functional layer 12 and the third functional layer 16 can increase the connection strength between the first functional layer 12 and the third functional layer 16, improve the energy absorption and vibration reduction characteristics of the structural component 10a, and reduce damage under high-speed collisions and friction.

[0191] For example, the characteristic size of the connecting material Bm1 may be less than or equal to a first size threshold.

[0192] For one-dimensional materials in the form of rods or tubes, the characteristic dimension can refer to the length of the one-dimensional material. For example, the characteristic dimension of carbon nanotubes can refer to the length of the carbon nanotubes. For two-dimensional materials, the characteristic dimension can refer to the maximum size of the two-dimensional material. For example, graphene oxide can be roughly in the shape of a disc, in which case the characteristic dimension of graphene oxide can be the diameter of the disc.

[0193] As an example, the aforementioned first size threshold can be 1 micrometer, 900 nanometers, 800 nanometers, 700 nanometers, 600 nanometers, or 500 nanometers, etc.

[0194] The smaller size of the connecting material Bm1 can prevent the aggregation of multiple connecting material Bm1 monomers, which is beneficial to the connection between the connecting material Bm1 and the liquid crystal polymer Lm1 (and / or liquid crystal polymer Lm2) and enhances the connection strength between the first functional layer 12 and the third functional layer 16.

[0195] One possibility is that the monomers of multiple connecting materials Bm1 may agglomerate to form aggregates, and, for example, the maximum size of the aggregates may be less than or equal to a second size threshold.

[0196] In some scenarios, the maximum size of the aggregate can also be referred to as the maximum aggregate size of the monomers of the connecting material Bm1.

[0197] As an example, the second size threshold can be 10 micrometers, 8 micrometers, 6 micrometers, 4 micrometers, 2 micrometers, etc.

[0198] Larger agglomerate sizes may affect the bonding between binder material Bm1 and liquid crystal polymer Lm1 (and / or liquid crystal polymer Lm2). By controlling the size of the agglomerates of binder material Bm1 to be as small as possible, binder material Bm1 can be more uniformly dispersed on the contact interface between liquid crystal polymer Lm1 and liquid crystal polymer Lm2. This allows binder material Bm1 to make more sufficient contact with liquid crystal polymer Lm1 (and / or liquid crystal polymer Lm2), which is beneficial for achieving a stronger bond between liquid crystal polymer Lm1 and liquid crystal polymer Lm2.

[0199] Figure 6 The distribution of the connecting material Bm1 in the second functional layer 14 on the surface of the first functional layer 12 (or the third functional layer 16) (hereinafter referred to as the connecting surface) is roughly shown. Figure 6 As shown, the monomers and aggregates of the connecting material Bm1 are roughly evenly distributed on the connecting surface.

[0200] For example, the areal density of the connecting material Bm1 distributed on the connecting surface can be less than or equal to an areal density threshold. As an example, this areal density threshold can be 80 micrograms per square meter, 70 micrograms per square meter, 60 micrograms per square meter, 50 micrograms per square meter, 40 micrograms per square meter, 20 micrograms per square meter, etc.

[0201] When liquid crystal polymers Lm1 and Lm2 are in contact, these two similar or identical materials can be fused together. If the areal density of the bonding material Bm1 on the contact surface is high, then the bonding material Bm1 will block the contact between liquid crystal polymers Lm1 and Lm2, which will adversely affect the connection strength between the first functional layer 12 and the third functional layer 16. Conversely, controlling the areal density of the bonding material Bm1 on the contact surface to be as low as possible is beneficial to improving the connection strength between the first functional layer 12 and the third functional layer 16.

[0202] Figure 7 and Figure 8 The connection between the connecting material Bm1, the liquid crystal polymer Lm1, and the liquid crystal polymer Lm2 is roughly shown. Figure 7 Using carbon nanotubes as the connecting material Bm1 as an example, Figure 8 The example uses graphene oxide as the connecting material, Bm1.

[0203] like Figure 7 As shown, carbon nanotubes are distributed between liquid crystal polymers Lm1 and Lm2, and Lm1 and the second polymer are interfused. Similarly, as... Figure 8 As shown, graphene oxide is distributed between liquid crystal polymers Lm1 and Lm2, and the liquid crystal polymers Lm1 and Lm2 are interfused and connected.

[0204] The connecting material Bm1 in the second functional layer 14 can be physically connected and / or chemically bonded to the liquid crystal polymers in the first functional layer 12 and the third functional layer 16, respectively. In this way, the connecting material Bm1 can be embedded between the first functional layer 12 and the third functional layer 16. When an external force (such as the force caused by collision or friction) is applied to the first functional layer 12, the first functional layer 12 and the third functional layer 16 can form a stick-slip friction by means of the pinning effect of the connecting material Bm1, resulting in a higher connection strength and making it less likely for the two to separate.

[0205] The liquid crystal polymer in the first functional layer 12 and the liquid crystal polymer in the third functional layer 16 can have similar physical and chemical properties. At the interface where they come into contact, the liquid crystal polymers in the two functional layers can fuse together to form an interface bridge, which can also enhance the connection strength between the first functional layer 12 and the third functional layer 16.

[0206] The structural component 10a has high interface connection strength between different functional layers. When subjected to external force, the structural component 10a is less likely to separate from each other and wear out. The structural component 10a is less prone to shedding, and less dust and particles will block the imaging light of the camera module, resulting in higher imaging quality of the camera module.

[0207] like Figure 9 The diagram shows another structural component 10b provided in this application embodiment, which can serve as another example of the aforementioned structural component 10. Similar to the aforementioned structural component 10a, structural component 10b is also a composite layered structure with multiple functional layers stacked on top of each other. Unlike structural component 10a, structural component 10b has isotropic protective layers on both sides that are opposite each other in the thickness direction. When external forces are applied to these two surfaces, structural component 10b is less prone to shedding or other phenomena.

[0208] In some examples, structural component 10b may include a first functional layer 22, a second functional layer 24, and a third functional layer 26 stacked sequentially. The relative positional relationship of these three functional layers is similar to that of the first functional layer 12, the second functional layer 14, and the third functional layer 16 in structural component 10a.

[0209] Specifically, the first functional layer 22 is located on the side of the structural member 10b that is susceptible to collision (and / or friction) with other structural members, the third functional layer 26 is located on the side of the structural member 10b that is not susceptible to collision (and / or friction) with other structural members, and the second functional layer 24 is located between the first functional layer 22 and the third functional layer 26. The first functional layer 22 can protect the third functional layer 26, and the second functional layer 24 can enhance the strength of the connection between the first functional layer 22 and the third functional layer 26.

[0210] In some examples, the first functional layer 22 may include a liquid crystal polymer Lm3, which includes liquid crystal elements U3, which may be randomly distributed in the liquid crystal polymer Lm3 so that the liquid crystal polymer Lm3 and the first functional layer 22 exhibit good isotropy on a macroscopic scale.

[0211] For a detailed explanation of the molecular structure of liquid crystal polymer Lm3 and the liquid crystal molecular structure of liquid crystal polymer Lm1, please refer to the relevant content on the liquid crystal molecular structure of liquid crystal polymer Lm1 mentioned above.

[0212] In some examples, the thickness of the first functional layer 22 may be less than or equal to a second thickness threshold, which, for example, may be 100 micrometers. Thus, the thickness of the first functional layer 22 may be 90 micrometers, 70 micrometers, 50 micrometers, 30 micrometers, 10 micrometers, etc.

[0213] In some examples, the third functional layer 26 may include sub-functional layers 26-1, 26-2, and 26-3 stacked sequentially along the thickness direction of the third functional layer 26. Sub-functional layer 26-1 is located on the side of the third functional layer 26 closer to the first functional layer 22, and sub-functional layer 26-3 is located on the side of the third functional layer 26 away from the first functional layer 22.

[0214] Sub-functional layers 26-1, 26-2, and 26-3 can all be composed of a liquid crystal polymer Lm4, which may include liquid crystal elements U4. The liquid crystal elements U4 may have a specific orientation in sub-functional layer 26-1 or sub-functional layer 26-3, and the liquid crystal elements U4 may be randomly arranged in sub-functional layer 26-2.

[0215] The composition and structure of sub-functional layer 26-1 are similar to those of sub-functional layer 16-1 described above. For an explanation of sub-functional layer 26-1, please refer to the introduction of sub-functional layer 16-1. Similarly, for an explanation of sub-functional layer 26-2, please refer to the introduction of sub-functional layer 16-2, and for an explanation of sub-functional layer 26-3, please refer to the introduction of sub-functional layer 16-3.

[0216] The molecular structure of liquid crystal polymer Lm4 is similar to that of liquid crystal polymer Lm2. For a detailed explanation, please refer to the relevant content on the liquid crystal molecular structure of liquid crystal polymer Lm2 mentioned above.

[0217] In some examples, the material compositions of the first functional layer 22 and the third functional layer 26 may be the same or similar. Alternatively, the molecular structures of the liquid crystal polymer Lm3 and the liquid crystal polymer Lm4 may be the same or similar.

[0218] For example, the liquid crystal units of liquid crystal polymer Lm3 and liquid crystal polymer Lm4 are the same or similar. And / or, the flexible spacer groups of liquid crystal polymer Lm3 and liquid crystal polymer Lm4 may be the same or similar.

[0219] In some examples, the second functional layer 24 may include a connecting material Bm2, which may be partially connected to the liquid crystal polymer Lm3 and partially connected to the liquid crystal polymer Lm4. The connection between the connecting material Bm2 and the liquid crystal polymer Lm3 (or liquid crystal polymer Lm4) may be a physical connection and / or a chemical bond.

[0220] For example, the connecting material Bm2 can be a one-dimensional material, such as a rod or a tube, or a two-dimensional material, such as a sheet.

[0221] For example, the connecting material Bm2 can be one or more of carbon nanotubes, carbon nitride nanotubes, metal oxide / sulfide nanotubes, and silicon carbide nanotubes. As another example, the connecting material Bm2 can be one or more of graphene, graphene oxide, titanium dioxide atom layer nanosheets, hexagonal boron nitride, and silicon nanosheets.

[0222] Multiple monomers of the connecting material Bm2 may aggregate to form aggregates. For example, the maximum size of the aggregate may be less than or equal to a second size threshold. As an example, the second size threshold may be 10 micrometers, 8 micrometers, 6 micrometers, 4 micrometers, 2 micrometers, etc.

[0223] The composition and properties of bonding material Bm2 are similar to those of bonding material Bm1 mentioned earlier. For more information about bonding material Bm2, please refer to the relevant content about bonding material Bm1.

[0224] In some examples, structural member 10b may further include a fifth functional layer 27 and a fourth functional layer 29, wherein the fourth functional layer 29 is located on the side of the third functional layer 26 away from the first functional layer 22, and the fifth functional layer 27 is located between the third functional layer 26 and the fourth functional layer 29. Thus, structural member 10b is provided with the first functional layer 22, the second functional layer 24, the third functional layer 26, the fifth functional layer 27, and the fourth functional layer 29 stacked sequentially along the thickness direction.

[0225] The fourth functional layer 29 functions similarly to the first functional layer 22, and can be used to improve the impact and friction resistance of the side of the structural component 10b facing away from the first functional layer 22. The fifth functional layer 27 functions similarly to the second functional layer 24, and can be used to enhance the strength of the connection between the third functional layer 26 and the fourth functional layer 29.

[0226] In some examples, the fourth functional layer 29 may include a liquid crystal polymer Lm5, which includes liquid crystal elements U5, which may be randomly distributed in the liquid crystal polymer Lm5 so that the liquid crystal polymer Lm5 and the fourth functional layer 29 exhibit good isotropy on a macroscopic scale.

[0227] For a detailed explanation of the molecular structure of liquid crystal polymer Lm5 and the liquid crystal molecular structure of liquid crystal polymer Lm1, please refer to the relevant content on the liquid crystal molecular structure of liquid crystal polymer Lm1 mentioned above.

[0228] In some examples, the thickness of the fourth functional layer 29 may be less than or equal to a third thickness threshold, which, for example, may be 100 micrometers. Thus, the thickness of the fourth functional layer 29 may be 90 micrometers, 70 micrometers, 50 micrometers, 30 micrometers, 10 micrometers, etc.

[0229] In some examples, the material compositions of the fourth functional layer 29 and the third functional layer 26 may be the same or similar. Alternatively, the molecular structures of the liquid crystal polymer Lm5 and the liquid crystal polymer Lm4 may be the same or similar.

[0230] For example, the liquid crystal units of liquid crystal polymer Lm5 and liquid crystal polymer Lm4 are the same or similar. And / or, the flexible spacer groups of liquid crystal polymer Lm5 and liquid crystal polymer Lm4 may be the same or similar.

[0231] In some examples, the fifth functional layer 27 may include a connecting material Bm3, which may be partially connected to the liquid crystal polymer Lm5 and partially connected to the liquid crystal polymer Lm4. The connection between the connecting material Bm3 and the liquid crystal polymer Lm5 (or liquid crystal polymer Lm4) may be a physical connection and / or a chemical bond.

[0232] For example, the connecting material Bm3 can be a one-dimensional material, such as a rod or a tube, or a two-dimensional material, such as a sheet.

[0233] For example, the connecting material Bm3 can be one or more of carbon nanotubes, carbon nitride nanotubes, metal oxide / sulfide nanotubes, and silicon carbide nanotubes. As another example, the connecting material Bm3 can be one or more of graphene, graphene oxide, titanium dioxide atom layer nanosheets, hexagonal boron nitride, and silicon nanosheets.

[0234] Multiple monomers of the connecting material Bm3 may aggregate to form aggregates. For example, the maximum size of such aggregates may be less than or equal to a third size threshold. As an example, the second size threshold may be 10 micrometers, 8 micrometers, 6 micrometers, 4 micrometers, 2 micrometers, etc.

[0235] The composition and properties of bonding material Bm3 are similar to those of bonding material Bm1 described earlier. For more information about bonding material Bm3, please refer to the relevant content on bonding material Bm1.

[0236] like Figure 10 The diagram shows another structural component 10c provided in this application embodiment, which can serve as yet another example of the aforementioned structural component 10. Similar to the aforementioned structural component 10a, structural component 10c is also a composite layered structure with multiple functional layers stacked on top of each other. Unlike structural component 10a, structural component 10c may further include a sixth functional layer 35, which may be composed of a shielding material containing metallic elements, thereby enhancing the shielding effect of structural component 10c against electromagnetic waves (signals) to a certain extent.

[0237] In some examples, structural component 10c may include a first functional layer 32, a second functional layer 34, and a third functional layer 36 arranged in sequence. The relative positional relationship of these three functional layers is similar to that of the first functional layer 12, the second functional layer 14, and the third functional layer 16 in structural component 10a.

[0238] Specifically, the first functional layer 32 is located on the side of the structural member 10c that is susceptible to collision (and / or friction) with other structural members, the third functional layer 36 is located on the side of the structural member 10c that is not susceptible to collision (and / or friction) with other structural members, and the second functional layer 34 is located between the first functional layer 32 and the third functional layer 36. The first functional layer 32 can protect the third functional layer 36, and the second functional layer 34 can enhance the strength of the connection between the first functional layer 32 and the third functional layer 36.

[0239] For more details about the first functional layer 32, the second functional layer 34 and the third functional layer 36, please refer to the introduction of the first functional layer 12, the second functional layer 14 and the third functional layer 16 in the previous text. They will not be repeated here.

[0240] In some examples, structural member 10c may also include a sixth functional layer 35, which is located between the first functional layer 32 and the third functional layer 36. Figure 11 The sixth functional layer 35 can have a mesh structure. This sixth functional layer 35 can be laid on part or all of the contact area between the first functional layer 32 and the third functional layer 36. As an example, Figure 11 In the middle, the sixth functional layer 35 is laid in a part of the right side of the contact surface between the first functional layer 32 and the third functional layer 36.

[0241] It is understood that the position of the sixth functional layer 35 in the structural component 10c can be designed according to the position of the structural component 10c in the drive motor, or in other words, the position of the sixth functional layer 35 in the structural component 10c can be designed according to the relative positional relationship between the structural component 10c and other electronic components in the drive motor. This application does not impose any restrictions on this.

[0242] Continue to refer to Figure 11 The size of the mesh in the sixth functional layer 35 can be greater than or equal to the aperture threshold so that the monomers and / or aggregates of the connecting material in the second functional layer 34 can be located in the mesh in the sixth functional layer 35. In this way, the sixth functional layer 35 is less likely to block the contact between the connecting material and the liquid crystal polymer in the first functional layer 32 (and / or the liquid crystal polymer in the third functional layer 36), and the connecting effect of the connecting material on the first functional layer 32 and the third functional layer 36 can maintain a good level.

[0243] The shape of the structural component 10 is not limited in the embodiments of this application, such as Figure 12 As shown, structural component 10 can be sheet-like or plate-like (illustrated). Figure 12-1 ), spherical (illustrated) Figure 12-2 ), columnar (illustrated) Figure 12-3 ), barrel-shaped (illustrated) Figure 12-4 Any of the above. The structural component 10 may also have a more complex shape; for example, the structural component 10 may be a combination of the aforementioned basic shapes.

[0244] For the plate-shaped structural member 10, its internal structure can be any one of the structural members 10a, 10b and 10c mentioned above; for the barrel-shaped structural member 10, it can be regarded as being manufactured by the plate-shaped structural member through processing technology, and its internal structural member can also be any one of the structural members 10a, 10b and 10c mentioned above.

[0245] Figure 13 As shown Figure 12 A schematic diagram of the radial section (e.g., section AA) of the spherical structural member 10 or a schematic diagram of the radial section (e.g., section BB) of the columnar structural member 10.

[0246] For spherical or columnar structural members 10, their different functional layers can be considered as radially stacked along the structural member. Specifically, refer to... Figure 13 The third functional layer 46 is located on the inner side, the first functional layer 42 is located on the outer side, and the second functional layer 44 is located between the first functional layer 42 and the third functional layer 46. The first functional layer 42 can protect the third functional layer 46, and the second functional layer 44 can enhance the strength of the connection between the first functional layer 42 and the third functional layer 46.

[0247] As an example, Figure 13 In this structure, the first functional layer 42 can be composed of a liquid crystal polymer and exhibits isotropic macroscopic properties. The composition and structure of the first functional layer 42 can be the same as or similar to those of the first functional layer 12. The second functional layer 44 can be composed of nanomaterials such as carbon nanotubes and graphene oxide. The composition and structure of the second functional layer 44 can be the same as or similar to those of the second functional layer 14. The third functional layer 46 can be composed of a liquid crystal polymer. The composition and structure of the third functional layer 46 can be the same as or similar to those of the third functional layer 16. The third functional layer 46 may include sub-functional layers 46-1, 46-2, and 46-3. The composition and structure of these three sub-functional layers can be the same as or similar to those of the sub-functional layers 16-1, 16-2, and 16-3 mentioned above, respectively.

[0248] For more information about the first functional layer 42, the second functional layer 44, and the third functional layer 46, please refer to the explanations of the first functional layer 12, the second functional layer 14, and the third functional layer 16 in the previous text. They will not be repeated here.

[0249] This application also provides a method for preparing the above-described structural component 10, such as... Figure 14 As shown, the preparation method can be roughly divided into three stages: the preparation stage of the main structural component, the preparation stage of the damping layer, and the bonding stage between the protective layer and the main structural component. Multiple different preparation processes can be used in a single preparation stage; this application does not impose any limitations on this, and the following is merely an illustrative example.

[0250] I. Preparation of the main structural component

[0251] The main body of a structural component can refer to the third functional layer 16 of structural component 10a, the third functional layer 26 of structural component 10b, or the third functional layer 36 of structural component 10c, etc. In other words, the third functional layer 16 constitutes the main part of structural component 10a, the third functional layer 26 constitutes the main part of structural component 10b, and the third functional layer 36 constitutes the main part of structural component 10c.

[0252] In some examples, the structural body can be manufactured using an injection molding process, where the raw material can be injection molding granules of liquid crystal polymer. For example, the raw material for the third functional layer 16 can be injection molding granules of liquid crystal polymer Lm2; and the raw material for the third functional layer 26 can be injection molding granules of liquid crystal polymer Lm4.

[0253] For example, in the preparation of the third functional layer 16, firstly, injection molding granules of the liquid crystal polymer Lm2 are added to the barrel of an injection molding machine and heated to a molten state. Then, pressure is applied through a screw or plunger, and the molten plastic is injected at high speed into a closed mold cavity. After filling, the plastic cools and solidifies within the cavity to form the desired shape. The solidified plastic can be removed from the mold, forming the main structure of structural component 10a.

[0254] During injection molding, excessively high processing temperatures can damage the molecular structure of the liquid crystal polymer, thereby affecting the strength, toughness, and other physical properties of the structural component. Furthermore, excessively high processing temperatures can increase the fluidity of the molten liquid crystal polymer, making it difficult to control the molding process of the structural component.

[0255] To minimize the likelihood of the aforementioned problems occurring, in one possible implementation, the processing temperature (injection temperature) T1 during the injection molding process can be slightly higher than the melting point of the liquid crystal polymer being processed.

[0256] For example, the melting point of the liquid crystal polymer processed in the injection molding process is T. m Therefore, the injection molding temperature T1 mentioned above can be T m +σ, where σ can be greater than 0 and less than or equal to 50℃. Thus, T1 can be T m +10℃, T m +20℃, T m +30℃, T m +40℃, etc.

[0257] In one possible example, the structural body can be activated before the damping layer is processed onto the surface of the structural body, so that more active sites can be formed on the surface of the structural body, thereby enabling the connecting material that makes up the damping layer to be better physically embedded and / or chemically bonded to the structural body.

[0258] For example, the main body of the structural component can be placed in a plasma chamber for plasma activation treatment for a preset time (e.g., 30 minutes, 45 minutes, etc.).

[0259] II. Preparation of Damping Layer

[0260] The damping layer can refer to the second functional layer 14, second functional layer 24, fifth functional layer 27, or second functional layer 34 mentioned above. The second functional layer 14 can increase the damping between the first functional layer 12 and the third functional layer 16; the second functional layer 24 can increase the damping between the first functional layer 22 and the third functional layer 26; the fifth functional layer 27 can increase the damping between the third functional layer 26 and the fourth functional layer 29; and the second functional layer 34 can increase the damping between the first functional layer 32 and the third functional layer 36.

[0261] In some examples, the damping layer can be prepared by a solution impregnation process. Specifically, the connecting materials that make up the damping layer are first dispersed to form a dispersion solution, and then the dispersion solution is deposited onto the main body of the structural component to form the damping layer.

[0262] For example, carbon nanotubes and / or graphene oxide can be mixed and dispersed by dissolving them in an ethanol solution.

[0263] For example, in a dispersion solution, the mass fraction of carbon nanotubes and / or graphene oxide can be less than 0.5%, and the mass fraction of dispersants (such as anionic surfactants like sodium dodecyl sulfate, polymeric dispersants like polyethylene glycol, etc.) can be less than 0.01%.

[0264] To reduce the likelihood of agglomeration of the connecting materials in the dispersion solution, the dispersion solution can be ultrasonically dispersed before processing carbon nanotubes and / or graphene oxide onto the structural body.

[0265] For example, for dispersions containing carbon nanotubes and / or graphene oxide, an ultrasonic disperser (ultrasonic crusher) can be used for ultrasonic dispersion for 30 minutes or longer before processing onto the structural body.

[0266] In one possible example, the main body of the structural component is first immersed in a dispersion solution of the bonding material. Then, a thermostatic magnetic stirrer is used to agitate the solution for a certain period to ensure sufficient contact between the bonding material and the main body, allowing it to deposit on the surface of the main body. Afterward, the structural component with the deposited bonding material is removed from the dispersion solution and subjected to atmospheric pressure drying (or vacuum drying, etc.) to allow the solvent remaining on the main body to evaporate completely. After the solvent evaporates, the bonding material remaining on the surface of the main body can form a damping layer.

[0267] In some examples, the damping layer can be prepared by an electrophoretic deposition (EPD) process, which deposits a dispersion solution containing connecting materials onto the structural body in a manner driven by an electric field, thereby forming the damping layer.

[0268] In the electrophoretic deposition process, the structural component body can serve as either the cathode or anode and is immersed in a dispersion solution. When an electric current is applied to the structural component body, an electric field can be formed between the structural component body in the dispersion solution and the other pole of the power source. This electric field can drive the connecting material in the dispersion solution to move toward the surface of the structural component body and deposit it on the surface of the structural component body.

[0269] After the structural component with deposited bonding material is removed from the dispersion solution, it is dried under normal pressure (or vacuum drying, etc.) to allow the solvent remaining on the structural component to evaporate completely. After the solvent evaporates, the bonding material remaining on the surface of the structural component can form a damping layer.

[0270] Furthermore, the connecting material can also be processed onto the surface of the main body of the structural component through more processes (e.g., solution spraying, etc.) to form a damping layer, and this application does not limit this.

[0271] III. Integrating the protective layer with the damping layer and the main structural component

[0272] The protective layer can refer to the first functional layer 12, the first functional layer 22, the first functional layer 32, etc. mentioned above. These functional layers can protect the main body of the structural component and reduce the probability of chipping during collision (and / or friction).

[0273] In one possible example, the protective layer can be an isotropic thin film, which can be bonded to the main body of the structural component by any of the following processes: vacuum autoclave process, laser transmission welding process, or insert injection molding process.

[0274] For example, the protective layer can be bonded to the main body of the structural component via a vacuum autoclave process.

[0275] For example, firstly, a thin-film protective layer is laid on the surface of the structural component body on which the damping layer has been deposited, and then placed in a mold. Next, it is vacuum-sealed using a vacuum bag and placed in an autoclave. It is then heated and pressurized for a certain period using a heating and pressure system to allow the liquid crystal polymers of the structural component body and the protective layer to fuse together. Afterward, the structural component body, damping layer, and protective layer are cooled to solidify the liquid crystal polymers. Once solidified, the structural component body, damping layer, and protective layer are interconnected, forming the structural component.

[0276] For example, the protective layer can be bonded to the main body of the structural component using a laser transmission welding process.

[0277] For example, firstly, a thin-film protective layer and a structural component body with a deposited damping layer are stacked and clamped using mechanical jigs to ensure a tight fit between the protective layer and the structural component body. Appropriate pressure is applied to promote the bonding of the constituent materials of the two functional layers after melting. Next, a near-infrared laser of a certain power is used to irradiate the welding area along a predetermined path. After the laser penetrates the upper material, it is absorbed by the lower material and converted into heat energy, melting the surface of the lower material. The heat is conducted to the upper layer, forming a molten zone. Within the molten zone, the liquid crystal polymer in the protective layer and the liquid crystal polymer in the structural component body can fuse together. Then, the structural component body, damping layer, and protective layer are cooled to solidify the liquid crystal polymer. After solidification, the structural component body, damping layer, and protective layer are interconnected, forming the structural component.

[0278] For example, the protective layer can be integrated with the structural body through an insert injection molding process.

[0279] For example, a structural component with a deposited damping layer can serve as an insert, and a thin-film protective layer can be molten and wrapped around the surface of the insert, bonding with it. Specifically, first, the structural component is fixed in a designated position in a mold using mechanical clamps, magnetism, vacuum adsorption, etc. Then, the protective layer is molten and injected into the mold to encapsulate the insert; temperature and pressure are controlled to ensure that the molten protective layer makes full and tight contact with the surface of the structural component. After a certain period, the mold is cooled to allow the liquid crystal polymer to solidify. After solidification, the structural component, damping layer, and protective layer are interconnected, forming the structural component.

[0280] In another example, the protective layer can be bonded to the main body of the structural component through more advanced processing techniques, which this application does not limit. For example, the protective layer can be a liquid crystal polymer powder, which can be bonded to the main body of the structural component through processes such as laser sintering.

[0281] During the bonding stage between the protective layer and the main structural component, controlling the processing temperature and / or processing pressure can ensure that the liquid crystal polymer in the protective layer and the liquid crystal polymer in the main structural component come into full contact and achieve resin fusion.

[0282] The processing temperature during the bonding stage between the protective layer and the main structural component can be T2, and the melting point of the liquid crystal polymer in the protective layer is T. m1 The melting point of the liquid crystal polymer in the main structural component is T. m2 .

[0283] In some examples, temperature T2 can be slightly higher than temperature T. m1 And temperature T2 is slightly higher than temperature T m2 In this way, the two liquid crystal polymers can fully melt and achieve resin fusion, and the liquid crystal polymers are not easily decomposed or structurally damaged due to excessively high temperatures.

[0284] For example, T2 = T m1 +σ1=T m2 +σ2.

[0285] Among them, σ1 can be greater than 0 and less than or equal to 50℃, and σ2 can be greater than 0 and less than or equal to 50℃.

[0286] For example, T2 can be T m1 +10℃, T m1 +20℃, T m1 +30℃, T m1 +40℃, etc. For example, T2 can be T... m2 +10℃, T m2 +20℃, T m2 +30℃, T m2 +40℃, etc.

[0287] In some examples, the processing pressure can be greater than or equal to a first pressure threshold, which can be 0.03 MPa, 0.05 MPa, 0.08 MPa, etc. By applying sufficiently high pressure during the resin fusion process between the protective layer and the structural component, the liquid crystal polymer in the protective layer and the liquid crystal polymer in the structural component can be brought into full contact, thereby achieving more thorough resin fusion.

[0288] In some examples, the processing pressure can be less than or equal to a second pressure threshold, which can be 0.1 MPa, 0.15 MPa, 0.2 MPa, 0.3 MPa, etc. During the resin fusion process between the protective layer and the structural component body, controlling the applied processing pressure to be less than the second pressure threshold ensures that the pressure on the surface of the structural component body is insufficient to cause deformation or even collapse of the structural component. This helps improve the stability of the structural component processing technology and the efficiency of structural component production.

[0289] In one possible example, the processing pressure is greater than or equal to a first pressure threshold and less than or equal to a second pressure threshold. This allows the liquid crystal polymer in the protective layer and the liquid crystal polymer in the main body of the structural component to fuse together, while also maintaining the shape of the structural component without deformation. For example, the first pressure threshold can be 0.1 MPa, the second pressure threshold can be 0.2 MPa, and the processing pressure can be 0.12 MPa, 0.14 MPa, 0.16 MPa, 0.18 MPa, etc.

[0290] During the stage of bonding the protective layer with the main structural component, controlling the cooling rate to be high enough can cause the liquid crystal polymer in the protective layer to form a random and irregular arrangement, thereby giving the protective layer isotropic physical properties.

[0291] In some examples, the cooling rate can be greater than or equal to a temperature change rate threshold. For example, this temperature change rate threshold can be 50℃ / s, 100℃ / s, 150℃ / s, 200℃ / s, etc. The cooling rate can be 60℃ / s, 120℃ / s, 180℃ / s, 240℃ / s, etc.

[0292] Figure 15 This diagram illustrates the relationship between processing temperature and processing pressure over time during the bonding stage between the protective layer and the main structural component. The melting point of the liquid crystal polymer in the protective layer and the melting point of the liquid crystal polymer in the main structural component can both be T. m The maximum processing temperature during the process is T. h (Temperature T) h Slightly greater than temperature T m The maximum processing pressure during the process is P. h .

[0293] like Figure 15 As shown, at time t0, the processing temperature is T0; the period from t0 to (t0+t1) is the heating phase, during which the processing temperature gradually increases from T0 and reaches its maximum value T. h The period between (t0+t1) and (t0+t1+t2) is the isothermal stage, during which the processing temperature is maintained at temperature T. hThe temperature remains constant; the temperature decreases between (t0+t1+t2) and (t0+t1+t2+t3), during which time the processing temperature changes from T... h It drops to T0.

[0294] like Figure 15 As shown, the processing pressure is P0 between t0 and (t0+t1); the processing temperature reaches its maximum value T. h The applied processing pressure is P h Between (t0+t1) and (t0+t1+t2), the processing pressure is maintained at P. h Constant; at (t0+t1+t2), the processing pressure is P h The pressure is released to P0, and between (t0+t1+t2) and (t0+t1+t2+t3), the processing pressure remains constant at P0. In other words, during the isothermal phase, the processing pressure remains constant at P0. h The pressure P0 remains constant during the heating or cooling phases.

[0295] As an example, the temperature T0 mentioned above can be room temperature (25°C), and the temperature T... m It can be 340℃, temperature T h The temperature can be 350℃, t2 can be 90 seconds, and t3 can be 5 seconds. The pressure P0 can be 0, and the pressure P... h It can be 0.2 MPa.

[0296] In one possible example, the side of the thin-film protective layer away from the main body of the structure can be coated with a release agent to facilitate subsequent demolding and improve the smoothness of the protective layer surface, reducing the likelihood of defects such as pits and bumps on the protective layer surface.

[0297] In one possible example, after the protective layer, damping layer, and structural body are combined to form the structural component, the surface of the structural component can be cleaned with a cleaning agent such as ethanol to remove mold release agent, dispersant, and residual connecting material (e.g., using a plasma cleaner). This reduces the amount of dust and organic matter remaining on the surface of the structural component, lowers the probability of introducing impurities that affect image quality through the structural component, and ensures the image quality of the camera module.

[0298] The functional groups contained in the constituent materials of structural component 10 can be determined using testing methods such as Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy. The melting point, glass transition temperature, and other information of the constituent materials of structural component 10 can be determined using differential scanning calorimetry as described in GB / T 19466.2, thermal analysis methods for the thermal stability of substances as described in GB / T 13464, and dynamic mechanical property testing methods for materials such as plastics and rubber as described in ISO 6721. Combining the aforementioned testing methods, it can be determined whether structural component 10 contains a liquid crystal polymer and what type of liquid crystal polymer it contains.

[0299] As an example and not a limitation, the following scheme can be used to test whether the constituent materials of structural component 10 contain liquid crystal polymer.

[0300] By observing the liquid crystal texture of the constituent materials of structural component 10 during heating or cooling using a polarizing microscope, it can be determined whether it has a liquid crystal phase. For liquid crystal polymers, specific optical textures will form at different temperatures, such as: cholesteric phase exhibiting colored spiral texture or focal conic texture; nematic phase exhibiting schlieren texture; and smectic phase exhibiting layered or striped structure.

[0301] The heat flow changes of the constituent materials of structural component 10 during heating / cooling are measured by differential scanning calorimetry to analyze the phase transition behavior of the materials, such as liquid crystal phase transition temperature and phase transition enthalpy. For liquid crystal polymers, there are phase transition temperatures from solid to liquid crystal phase and from liquid crystal phase to isotropic liquid state.

[0302] The molecular ordering of the constituent materials of structural component 10 was analyzed by X-ray diffraction. Typically, the long-range ordered structure of liquid crystal polymers forms characteristic diffraction peaks. For example, during X-ray diffraction analysis, the cholesteric phase can form a Schlieren pattern, and the nematic / smectic phase can form one-dimensional or two-dimensional ordered diffraction peaks.

[0303] The chemical structure of the constituent materials of structural component 10 was analyzed by Fourier transform infrared spectroscopy and nuclear magnetic resonance hydrogen spectroscopy, and the orderliness of the molecular chains of the materials was also analyzed.

[0304] The microstructure of the constituent materials of the structural component 10 is observed by means of scanning electron microscopy, transmission electron microscopy, etc., to determine the phase separation or orientation structure of the liquid crystal phase.

[0305] Ultra-depth-of-field microscopes can be used to observe the microstructure of structural components. For example... Figure 16 As shown, using a super depth-of-field microscope, it was observed that the structural component 10 prepared in the embodiment of this application has a multi-layer structure, and the thickness of the protective layer is approximately 50 micrometers.

[0306] The differences in tensile strength and elastic modulus in different directions of a thin-film protective layer can, to some extent, reflect its isotropy. The elastic modulus of the protective layer was tested using the instrumented nanoindentation test method described in GB / T 25898, and the test results are as follows: Figure 17 and Figure 18 As shown.

[0307] like Figure 17The test results of the elastic modulus of the thin-film protective layer in two mutually perpendicular directions are shown at different test temperatures. The solid line represents the test result of the elastic modulus in the X direction, and the dashed line represents the test result of the elastic modulus in the Y direction. The test temperature range is from 25℃ to 275℃.

[0308] Specifically, at 25°C, the elastic modulus test result M in the X direction... x1 The elastic modulus test result in the Y direction is 3880 MPa. y1 The elastic modulus was 3820 MPa, and the difference rate between the elastic modulus test results in the two directions was 1.5%; at 75℃, the elastic modulus test result M in the X direction was... x2 The elastic modulus test result in the Y direction is 1730 MPa. y2 The elastic modulus test results in the two directions were 12%, with a strength of 1520 MPa. At 150℃, the elastic modulus test result in the X direction was M... x3 The elastic modulus test result in the Y direction is 840 MPa. y3 The elastic modulus test results in the two directions were 4.8% at 800 MPa; at 200℃, the elastic modulus test results in the X direction were M x4 The elastic modulus test result in the Y direction is 600 MPa. y4 The elastic modulus was 560 MPa, and the difference rate between the elastic modulus test results in the two directions was 6.7%; at 250℃, the elastic modulus test result M in the X direction was... x5 The elastic modulus test result in the Y direction is 340 MPa. y5 The value is 290 MPa, and the difference rate of the elastic modulus test results in the two directions is 15%.

[0309] Test results show that at different temperatures, the difference in elastic modulus of the thin-film protective layer in two mutually perpendicular directions is less than or equal to 20%.

[0310] Figure 18 The results show the variation of the elastic modulus of the thin-film protective layer in two mutually perpendicular directions at room temperature (25℃) over time. The solid line represents the elastic modulus test result in the X direction, and the dashed line represents the elastic modulus test result in the Y direction. The test time range is from 300s to 1300s.

[0311] Specifically, around 400s, the test result M of the elastic modulus in the X direction. 11 The test result of the elastic modulus in the Y direction is 3740 MPa. 21The elastic modulus was 3860 MPa, and the difference rate between the elastic modulus test results in the two directions was 3.1%; around 600 s, the elastic modulus test result in the X direction was M 12 The test result of the elastic modulus in the Y direction is 3720 MPa. 22 The elastic modulus was 3980 MPa, and the difference rate between the elastic modulus test results in the two directions was 6.5%; around 800 s, the elastic modulus test result in the X direction was M 13 The test result M of the elastic modulus in the Y direction is 3800MPa. 23 The elastic modulus was 3950 MPa, and the difference rate between the elastic modulus test results in the two directions was 3.8%; around 1000 s, the elastic modulus test result M in the X direction... 14 The test result of the elastic modulus in the Y direction is 3820 MPa. 24 The elastic modulus was 3930 MPa, and the difference rate between the elastic modulus test results in the two directions was 2.8%; around 1200 s, the elastic modulus test result in the X direction was M 15 The test result of the elastic modulus in the Y direction is 3770 MPa. 25 The value was 3980 MPa, and the difference rate of the elastic modulus test results in the two directions was 5.3%.

[0312] Test results show that, at different temperatures, the difference in elastic modulus of the thin-film protective layer in two mutually perpendicular directions is about 5%.

[0313] The microstructure of the connecting material in the damping layer was observed using transmission electron microscopy, such as... Figure 19 As shown, schematic Figure 19-1 The microstructure of carbon nanotubes is shown, illustrating... Figure 19-2 This is a magnified view of region A1 of the carbon nanotubes. Test results show that the diameter of the carbon nanotubes is approximately 40 nanometers, and the length of a single carbon nanotube is less than 1 micrometer.

[0314] like Figure 20 The image shows two structural components provided in the embodiments of this application. The one on the left is structural component A, which is constructed by... Figure 14 The structure was prepared by the method shown; the structure B on the right is the control group, which does not contain a damping layer or a protective layer.

[0315] Drop tests were conducted on structural components A and B according to the test method described in GB / T2423.7. Figure 21 A test fixture used in drop tests is shown. The test fixture includes a cover and a body. The body has multiple slots that can be used to accommodate the structural component to be tested.

[0316] Before the test, two structural components A were placed in the upper right and lower left corner slots, respectively, and two structural components B were placed in the upper left and lower right corner slots, respectively. Then the cover was closed, and a drop test was conducted on the test bench. Figure 22 The diagram shows the debris residue on the surface of the test fixture's cover after two drop tests. (Left side illustration) Figure 22-1 The results of the first drop test are shown on the right. Figure 22-2 The results of the second drop test are shown.

[0317] In the first test, the cover portion above the lower right corner of the tank had noticeable black debris residue, while the covers of the other three tanks did not have significant debris residue. This indicates that structural component B in the lower right corner of the tank produced more debris during the drop test, while the other structural components produced less debris.

[0318] In the second test, the covers on the upper left and lower right corners of the tanks had noticeable black debris residue, while the covers on the upper right and lower left corners had no noticeable debris residue. This indicates that structural components B produced more debris in the drop test, while structural components A produced less debris.

[0319] Based on the combined results of the two drop tests, the structural component provided in this application is less prone to chipping during drop testing.

[0320] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A motor component, characterized in that, include: The system comprises a first functional layer, a second functional layer, and a third functional layer, with the second functional layer located between the first functional layer and the third functional layer. The first functional layer includes a first liquid crystal polymer; The constituent materials of the second functional layer are partially connected to the first functional layer and partially connected to the third functional layer; The third functional layer includes a second liquid crystal polymer; Wherein, the tensile strength S1 of the first functional layer in the first direction and the tensile strength S2 in the second direction satisfy: |S1-S2| / (max{S1,S2})≤20%; And / or, the tensile modulus M1 of the first functional layer in the first direction and the tensile modulus M2 in the second direction satisfy: |M1-M2| / (max{M1,M2})≤20%; The first direction and the second direction are different.

2. The motor component according to claim 1, characterized in that, The first liquid crystal polymer is isotropic.

3. The motor component according to claim 1 or 2, characterized in that, The constituent materials of the second functional layer are partially embedded in the first functional layer and partially embedded in the third functional layer; and / or, the constituent materials of the second functional layer are partially chemically bonded to the first liquid crystal polymer and partially chemically bonded to the second liquid crystal polymer.

4. The motor component according to any one of claims 1 to 3, characterized in that, The second functional layer includes carbon nanotubes and / or graphene oxide.

5. The motor component according to claim 4, characterized in that, The maximum size of the carbon nanotubes and the graphene oxide is less than or equal to 1 micrometer.

6. The motor component according to any one of claims 1 to 5, characterized in that, The constituent materials of the second functional layer are distributed on the interface between the first functional layer and the third functional layer.

7. The motor component according to claim 6, characterized in that, The areal density of the constituent materials of the second functional layer is less than or equal to 70 micrograms per square meter.

8. The motor component according to claim 6 or 7, characterized in that, The maximum aggregate size of the constituent materials of the second functional layer is less than or equal to 10 micrometers.

9. The motor component according to any one of claims 1 to 8, characterized in that, The difference between the melting point of the first liquid crystal polymer and the melting point of the second liquid crystal polymer is less than or equal to 30 degrees Celsius.

10. The motor component according to claim 9, characterized in that, The liquid crystal moiety of the first liquid crystal polymer is the same as that of the second liquid crystal polymer, and / or the flexible spacer groups of the first liquid crystal polymer are the same as those of the second liquid crystal polymer.

11. The motor component according to any one of claims 1 to 10, characterized in that, The thickness of the first functional layer is less than or equal to 100 micrometers.

12. The motor component according to any one of claims 1 to 11, characterized in that, The motor component further includes a fourth functional layer, which is located on the side of the third functional layer opposite to the second functional layer, and the fourth functional layer includes a third liquid crystal polymer.

13. A drive motor, characterized in that, Includes the motor component according to any one of claims 1 to 12.

14. The drive motor according to claim 13, characterized in that, The moving and / or stationary components of the drive motor include the motor components.

15. The drive motor according to claim 14, characterized in that, The first functional layer of the motor component includes a collision surface and / or a contact surface.

16. A camera module, characterized in that, It includes an image sensor, a lens module, and a drive motor according to any one of claims 13 to 15, wherein the drive motor is used to drive the image sensor and / or the lens module.

17. An electronic device, characterized in that, It includes a housing and the camera module as described in claim 16, wherein the camera module is fixedly connected to the housing.

18. A method for manufacturing a structural component, characterized in that, The method includes: The main body of the structural component is prepared by injection molding using a first liquid crystal polymer as raw material. A connecting material is deposited on the surface of the main body of the structural component; The second liquid crystal polymer is deposited on the surface of the main body of the structural component on which the connecting material is deposited, and the temperature is raised to a first temperature so that the first liquid crystal polymer and the second liquid crystal polymer melt. After maintaining the first temperature constant for a preset time, the temperature is cooled at a first cooling rate greater than or equal to 50 degrees Celsius per second.

19. The preparation method according to claim 18, characterized in that, The difference between the first temperature and the melting point of the first liquid crystal polymer is greater than 0 and less than 50 degrees Celsius, and the difference between the first temperature and the melting point of the second liquid crystal polymer is greater than 0 and less than 50 degrees Celsius.

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