Lens barrel, camera module and lens barrel manufacturing method

Abstract

The invention discloses a lens barrel, a camera module and a lens barrel manufacturing method, the lens barrel is used for the camera module, the lens barrel comprises an integrally formed lens barrel body, the lens barrel body comprises a magnetic part and a mounting hole used for bearing a lens, and the magnetic part has magnetism. According to the lens barrel, the magnetic part is integrated into the lens barrel body, so that the step of additionally installing a magnet on a lens is omitted, meanwhile, the space of an optical structure is prevented from being occupied, and miniaturization of a camera is facilitated.

Description

Technical Field

[0001] This application belongs to the field of camera equipment technology, specifically relating to a lens barrel, camera module, and lens barrel manufacturing method. Background Technology

[0002] In the field of modern camera equipment, one solution to reduce camera size involves mounting the magnets needed for motor movement onto the lens, thereby reducing the overall size of the camera. Furthermore, to ensure the balance of the motor-driven lens movement, magnets are typically mounted on the lower part of the lens, allowing it to adhere to a steel base plate during movement. Therefore, this method of reducing camera size requires the installation of magnets on the lens.

[0003] However, installing magnets on the lens requires ensuring that the space reserved for the lens's optical structure is not affected, which increases the complexity of lens assembly. Summary of the Invention

[0004] This application provides a lens barrel, a camera module, and a lens barrel manufacturing method, aiming to solve the problem that installing magnets on existing lenses requires ensuring that the optical structure space reserved in the lens is not affected, which increases the complexity of lens assembly.

[0005] In a first aspect, this application provides a lens barrel, comprising: an integrally formed lens barrel body, the lens barrel body including a magnetic part and a mounting hole for carrying a lens, the magnetic part being magnetic.

[0006] In some embodiments, the lens barrel body is injection molded from a magnetic material, and the magnetic part is magnetic through a magnetization process.

[0007] In some embodiments, the magnetic material includes resin and magnetic filler.

[0008] In some embodiments, the resin includes one or more of polyphenylene sulfide, polycarbonate, polyamide, polypropylene, and acrylonitrile-butadiene-styrene, and the resin accounts for 30%-80% of the weight of the magnetic material.

[0009] In some embodiments, the magnetic filler includes one or more of ferrite, rare earth, and metal fibers, and the magnetic filler accounts for 20%-70% of the weight of the magnetic material.

[0010] In some embodiments, the magnetic material further includes auxiliary additives, which include one or more of plasticizers and lubricants, and the weight percentage of the auxiliary additives in the magnetic material is 0%-30%.

[0011] Secondly, this application provides a camera module, including the lens barrel described in the first aspect, wherein a plurality of lenses are disposed in the lens barrel.

[0012] Thirdly, this application provides a method for manufacturing a lens barrel, comprising the following steps: Take an appropriate amount of resin and magnetic filler, and mix the resin and magnetic filler in an environment below the temperature threshold to form a magnetic material; The magnetic material is added to an injection molding machine, and the magnetic material is used to injection mold a first semi-finished product in a molten state with the shape of a mirror barrel. A magnetic field is applied to the first semi-finished product to cause the magnetic filler to gather in a preset magnetic area. After cooling, a second semi-finished product with a solid state and a mirror tube shape is obtained. The second semi-finished product is magnetized to obtain the finished lens barrel.

[0013] In some embodiments, adding the magnetic material to an injection molding machine and using the injection molding machine to injection mold the magnetic material to form a first semi-finished product in a molten state with a lens barrel shape includes: The magnetic material is added to an injection molding machine, and the magnetic material is melted and mixed using the injection molding machine, so that the magnetic material becomes molten. The magnetic material in a molten state is injected through the injection molding equipment to form a first semi-finished product that is in a molten state and has the shape of a mirror barrel.

[0014] In some embodiments, the step of taking an appropriate amount of resin and magnetic filler, and mixing the resin and magnetic filler in an environment below a temperature threshold to form a magnetic material includes: Take an appropriate amount of resin and dry it. Take an appropriate amount of magnetic filler and perform surface treatment on the magnetic filler; Take an appropriate amount of auxiliary additives, put the resin, magnetic filler and auxiliary additives into a mixer and mix them, and control the mixing temperature below the temperature threshold to obtain a magnetic material.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: The lens barrel of this application embodiment integrates the magnetic part into the lens barrel body, eliminating the step of additionally installing magnets on the lens, while avoiding encroachment on the optical structure space, which helps to achieve the miniaturization of the camera. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a lens in the prior art; Figure 2A schematic diagram of the overall structure of a lens barrel provided in this application; Figure 3 A flowchart of a lens barrel manufacturing method provided in this application; Figure 4 A first sub-flowchart of a lens barrel manufacturing method provided in this application; Figure 5 A second sub-flowchart of a lens barrel manufacturing method provided in this application; Figure 6 This application provides a schematic diagram of the overall structure of a camera module. Figure 7 An exploded view of a camera module provided in this application.

[0017] Explanation of reference numerals in the attached drawings: 1-lens, 11-lens body, 12-magnetic part, 13-mounting hole; 2-magnet; 3-camera module, 31-housing, 32-electromagnetic coil. Detailed Implementation

[0018] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In today's camera equipment industry, reducing camera size is a significant development trend. For example... Figure 1 As shown, the conventional approach achieves this by assembling a magnet 2 onto the lens. However, this method has some problems, particularly the need to ensure that the optical structure space reserved in the lens remains unaffected when mounting the magnet 2, which increases the complexity of lens assembly. To address these issues, this application proposes a novel lens barrel 1 design, which is detailed below.

[0020] like Figure 2 As shown, this application provides a lens barrel 1 for carrying a lens. The lens barrel 1 includes an integrally formed lens barrel body 11. The lens barrel body 11 includes a magnetic part 12 and a mounting hole 13 for carrying the lens. The magnetic part 12 has magnetism and cooperates with an external coil to generate magnetic force. The magnetic force can drive the lens barrel 1 or the component with the coil to move, so that the camera module with the lens barrel 1 and the coil has focusing and / or image stabilization functions.

[0021] It is understood that this embodiment integrates the magnetic part 12 into the lens barrel body 11, eliminating the need for additional magnet 2 installation on the lens and avoiding encroachment on the optical structure space. Specifically, during the manufacturing process, the lens barrel body 11 and the magnetic part 12 are molded as a whole. By integrally molding the magnetic part 12 with the lens barrel body 11, the steps and complexity of lens module assembly are reduced, and the impact of additional magnet 2 installation on the lens on the optical structure space is avoided, which helps to achieve miniaturization of the camera.

[0022] In some embodiments, the lens barrel body 11 is injection molded from a magnetic material, and the magnetic part 12 is magnetic through a magnetization process.

[0023] Understandably, by using magnetic material injection molding, the magnetic part 12 is integrated with the lens barrel body 11 during the manufacturing process. The magnetic material is shaped into the lens barrel 1 during injection molding, and then the magnetic part 12 acquires magnetism through a magnetization process. The magnetization process uses an external magnetic field to magnetize the magnetic material, causing the magnetic domains to align in an orderly manner, thereby giving the magnetic part 12 the required magnetic properties. This avoids the impact of installing an additional magnet 2 on the structure of the lens barrel 1, maintaining the integrity and structural strength of the lens barrel 1.

[0024] In some embodiments, the magnetic material includes resin and magnetic filler. The resin serves as the matrix material, providing mechanical support and bonding to ensure the structural integrity of the lens barrel body 11; the magnetic filler imparts the required magnetism to the magnetic part 12. During manufacturing, the resin and magnetic filler are mixed in a certain proportion to form a magnetic material, which is then injection molded into the lens barrel body 11. The molded lens barrel body 11 is then magnetized by a magnetization process to obtain the desired magnetism.

[0025] In some embodiments, the resin includes one or more of polyphenylene sulfide (PPS), polycarbonate (PC), polyamide (PA), polypropylene (PP), and acrylonitrile butadiene styrene (ABS), and the resin accounts for 30%-80% of the weight of the magnetic material. Preferably, in this embodiment, polyphenylene sulfide is selected as the resin. Polyphenylene sulfide has high mechanical strength, high temperature resistance, and good chemical stability. Selecting polyphenylene sulfide with high mechanical strength and high temperature resistance can significantly improve the mechanical properties of the lens barrel body 11, ensuring its stability and reliability during use.

[0026] It should be noted that different resin materials and their weight percentage in the magnetic material can be selected according to different application requirements. For example, when polyamide is selected as the resin, the weight percentage of polyamide in the magnetic material can reach 80%. As another example, when polypropylene is selected as the resin, the weight percentage of polypropylene in the magnetic material is 53%-80%.

[0027] In some embodiments, the magnetic filler includes one or more of ferrite, rare earth, and metal fiber, and the magnetic filler accounts for 20%-70% of the weight of the magnetic material.

[0028] Among them, ferrites include barium ferrite, strontium ferrite, or iron(III) oxide, etc. When selecting ferrites, any one or more of barium ferrite, strontium ferrite, and iron(III) oxide can be selected; rare earths include neodymium iron boron, etc. When selecting rare earths, neodymium iron boron can be selected; metal fibers include stainless steel fibers, iron fibers, etc. When selecting metal fibers, any one or more of stainless steel fibers and iron fibers can be selected.

[0029] In some embodiments, the lens tube 1 is applied in the field of medical detection. It can be selected as a magnetic material by mixing polyamide in resin and rare earth in magnetic filler. The proportion of polyamide in the magnetic material is 60%-70%, and the proportion of rare earth in the magnetic material is 30%-40%. The lens tube 1 thus forms a combination of biocompatibility and high detection sensitivity.

[0030] In some embodiments, when the lens barrel 1 is applied in an industrial setting, a mixture of polypropylene in the resin and iron fiber in the magnetic filler can be used as the magnetic material. The proportion of polypropylene in the magnetic material is 73%-80%, and the proportion of iron fiber in the magnetic material is 20%-27%. The resulting lens barrel 1 is suitable for scenarios requiring lightweight and impact resistance.

[0031] In some embodiments, the magnetic material further includes auxiliary additives, which include one or more of plasticizers and lubricants, and the weight percentage of the auxiliary additives in the magnetic material is 0%-30%. Talc and carbon black can be selected as auxiliary additives. For example, adding talc can improve the dimensional stability of the material, improve surface gloss, reduce the coefficient of friction, improve processing fluidity, and reduce equipment wear. Adding carbon black, for example, can enhance the strength, hardness, and wear resistance of the material, and also provides good electrical conductivity and UV protection.

[0032] It is understandable that auxiliary additives play a role in improving the processing and overall performance of magnetic materials. Plasticizers can improve the flexibility and plasticity of magnetic materials, making them easier to flow and mold during injection molding; lubricants can reduce friction within the material and between the material and equipment, improving processing efficiency and reducing equipment wear. By adding appropriate auxiliary additives to magnetic materials, their processing and performance can be significantly improved without affecting their main properties. In the preparation of magnetic materials, suitable types of auxiliary additives are selected according to specific needs and mixed with resins and magnetic fillers. For example, if it is necessary to improve the flexibility of the magnetic material, a plasticizer can be added; if it is necessary to reduce friction during processing, a lubricant can be added.

[0033] like Figure 6 and Figure 7 As shown, this application provides a camera module 3, including a lens barrel 1, in which a plurality of lenses are disposed.

[0034] In some embodiments, the camera module 3 further includes a housing 31 and an electromagnetic coil 32. The housing 31 has a mounting cavity, and the electromagnetic coil 32 is disposed on the inner wall of the mounting cavity. During the manufacturing process of the camera module 3, the lens barrel 1 of the above embodiment is installed into the mounting cavity of the housing 31. The magnetic part 12 of the lens barrel 1 can interact with the electromagnetic coil 32 of the camera module 3 to achieve precise control of the lens. Specifically, by utilizing the magnetism of the magnetic part 12 in the lens barrel 1, a magnetic field is generated by driving the electromagnetic coil 32, which can push the lens barrel 1 to move, causing the lens mounted on the lens barrel 1 to move together, thereby achieving functions such as autofocus.

[0035] In some embodiments, the camera module further includes a Hall sensor for detecting changes in the magnetic field, thereby enabling precise monitoring and feedback control of the lens position.

[0036] It is understood that the camera module in this embodiment can be a mobile phone camera, or a tablet computer camera, a laptop computer camera, a vehicle camera, a security monitoring camera, an industrial inspection camera, a camera in a medical imaging device, etc., and is not limited here.

[0037] Please see Figures 3-5 This application provides a method for manufacturing a lens barrel, including the following steps S100-S400: S100. Take an appropriate amount of resin and magnetic filler, and mix the resin and magnetic filler in an environment below the temperature threshold to form a magnetic material.

[0038] Understandably, by selecting appropriate amounts of resin and magnetic filler and mixing them at a suitable temperature, it is possible to ensure that the magnetic filler is uniformly dispersed in the resin matrix, while avoiding premature melting of the resin or damage to the performance of the magnetic filler due to excessively high temperatures. The temperature threshold is set at the softening point of the resin material to prevent melting during the mixing process, which could lead to uneven mixing.

[0039] In some embodiments, step S100 includes S110-S130: S110. Take an appropriate amount of resin and dry it.

[0040] Understandably, drying is necessary to remove moisture from the resin, preventing material vaporization during injection molding and the resulting defects such as bubbles and cracks, which could affect the appearance and / or performance of the finished product. Optionally, the resin can be placed in an oven and dried at a specific temperature for a certain period of time. For example, polyamide needs to be dried at 80-120°C for 4-6 hours. Optionally, the appropriate amount of resin in the magnetic material should be 30%-80% by weight.

[0041] S120. Take an appropriate amount of magnetic filler and perform surface treatment on the magnetic filler.

[0042] Understandably, surface treatment aims to improve the compatibility of magnetic fillers with resins, enhance the dispersibility and binding force of magnetic fillers in the resin matrix, thereby improving the overall performance of magnetic materials. Optionally, surface treatment agents (such as silane coupling agents) can be used to coat the magnetic fillers. The magnetic fillers are mixed with the surface treatment agent to ensure that each magnetic particle is uniformly coated. Optionally, the appropriate amount of magnetic filler in the magnetic material accounts for 20%-70% of its weight.

[0043] S130. Take an appropriate amount of auxiliary additives, put the resin, magnetic filler and auxiliary additives into the mixer and mix them, and control the mixing temperature to be lower than the temperature threshold to obtain the magnetic material.

[0044] It is understandable that adding auxiliary additives (such as plasticizers and lubricants) can improve the processing performance and overall properties of magnetic materials. Optionally, the dried resin, surface-treated magnetic filler, and auxiliary additives can be added to a mixer in a certain proportion and mixed at a temperature below the temperature threshold. During the mixing process, the components are fully contacted and dispersed under mechanical stirring, and the auxiliary additives are distributed between the resin and magnetic filler, thus improving performance. Controlling the temperature below the temperature threshold prevents premature melting of the resin, ensuring the feasibility of the mixing operation and the uniformity of the mixing effect. Optionally, the weight percentage of the auxiliary additives in the magnetic material is 0%-30%.

[0045] In some embodiments, polyamide can be selected as the resin matrix and dried in an oven at 100°C for 5 hours. Ferrite is selected as the magnetic filler and mixed with a silane coupling agent so that each ferrite particle is uniformly coated with the silane coupling agent. 100g of dried polyamide, 80g of surface-treated ferrite magnetic powder, 10g of plasticizer, and 5g of lubricant are added to a mixer and mixed at 60°C for 20 minutes to obtain a uniform magnetic material, laying a good foundation for subsequent injection molding and other operations.

[0046] S200. Add magnetic material to the injection molding equipment, and use the injection molding equipment to form a first semi-finished product in a molten state with the shape of a mirror barrel.

[0047] In this embodiment, magnetic material is placed in an injection molding machine, and through heating and pressurization, the magnetic material is melted and injected into a mold to form the preliminary shape of the lens barrel.

[0048] In some embodiments, step S200 includes S210-S220: S210. Add the magnetic material to the injection molding equipment, and use the injection molding equipment to melt and mix the magnetic material, so that the magnetic material becomes molten.

[0049] In this embodiment, the magnetic material is uniformly melted and mixed through the heating and mechanical action of the injection molding equipment, ensuring the dispersion of the magnetic filler in the resin matrix. Specifically, the magnetic material is placed in the hopper of the injection molding machine, and the material is heated to a molten state by the heating device of the barrel. At the same time, the rotation and compression action of the screw in the injection molding machine ensures that the magnetic material is fully mixed in the barrel, ensuring the uniform distribution of the magnetic filler in the resin.

[0050] S220. Molten magnetic material is injected through injection molding equipment to form a first semi-finished product with a molten state and a mirror barrel shape.

[0051] Understandably, the screw of the injection molding machine rapidly injects molten magnetic material into the mold under high pressure, and the shape of the mold determines the shape of the lens barrel.

[0052] In some embodiments, the temperature of the injection molding machine barrel can be set to 230℃-280℃, and the screw speed to 300rpm-500rpm. The injection molding machine heats the magnetic material to a molten state through a heating device, while the rotation of the screw ensures that the material is fully mixed in the barrel, guaranteeing that the magnetic filler is uniformly dispersed in the resin matrix. Furthermore, the injection pressure is set to 60-120MPa, and the screw rapidly injects the molten magnetic material into the mirror barrel mold.

[0053] S300. Apply a magnetic field to the first semi-finished product to cause the magnetic filler to gather in a preset magnetic area. After cooling, a second semi-finished product with a solid state and a mirror tube shape is obtained.

[0054] It is understood that in this embodiment, an external magnetic field is applied to cause the magnetic filler to oriented and aggregate in a predetermined magnetic region. Cooling then solidifies the material, thus maintaining the position and shape of the magnetic region, which becomes the magnetic part of the molded lens barrel. Optionally, while the first semi-finished product is still molten, the mold is placed in an external magnetic field with a strength of 0.5T and maintained for 30 seconds. This causes the magnetic filler to aggregate and oriented in the magnetic region under the influence of the magnetic field, laying the foundation for the subsequent formation of the magnetic part. Subsequently, the mold is cooled to room temperature, allowing the first semi-finished product to solidify into the second semi-finished product.

[0055] In some embodiments, the magnetic components are disposed on both sides of the lens barrel. Before the first semi-finished product cools and solidifies, the entire mold carrying the first semi-finished product is placed in an external magnetic field environment with a magnetic field strength of 0.5T. This magnetic field is maintained for 30 seconds. During this period, under the influence of the magnetic force, the magnetic filler moves directionally from the molten resin and gathers in predetermined areas on both sides of the lens barrel, forming an orderly arrangement. This lays the foundation for obtaining stable magnetic properties after subsequent magnetization. Once the mold cools to room temperature, the molten first semi-finished product solidifies into a solid second semi-finished product. At this point, the magnetic filler is fixed in the predetermined areas on both sides of the lens barrel and will not shift due to subsequent processing or use.

[0056] Optionally, an electromagnetic coil can be integrated into the injection molding stage to achieve dynamic magnetic field control of the magnetic powder orientation accuracy. Specifically, an electromagnetic coil is integrated into the mold section of the injection molding machine, and the orientation of the magnetic filler can be dynamically adjusted during the injection molding process by precisely controlling the current. For example, the magnetic field can be gradually increased during the injection molding process to ensure that the magnetic filler can be precisely aligned in a predetermined direction when filling the mold.

[0057] Optionally, during the step of applying an external magnetic field to the first semi-finished product, the uniformity of the magnetic material melt can be analyzed in real time using infrared spectroscopy (reference wavelength 2.5-25μm).

[0058] S400: Magnetize the second semi-finished product to obtain the finished lens barrel.

[0059] Understandably, magnetization further magnetizes the second semi-finished product. Since the magnetic filler aggregates in the magnetic region, the magnetic field strength in the magnetic region will be significantly stronger than in other regions after magnetization. This magnetic region then becomes the final magnetic part, meeting the application requirements of the lens barrel in the camera module. Optionally, the second semi-finished product is placed in a magnetization device and magnetized using a pulsed magnetic field with a strength of 1T and a duration of 0.1 seconds. After magnetization, the magnetic region of the lens barrel acquires stable magnetic properties and transforms into the magnetic part of this embodiment, completing the manufacturing of the finished lens barrel. It should be noted that the intensity of the applied pulsed magnetic field should be greater than or equal to the coercivity of the magnetic filler material.

[0060] In some embodiments, after step S400, steps such as surface processing of the lens barrel and quality inspection of the lens barrel are further included. Surface processing is used to achieve the fine structure and specific shape of the lens barrel. Laser cutting or CNC machining can be used for surface processing of the lens barrel, and care must be taken to avoid high temperatures damaging the distribution of the magnetic filler. For example, if it is necessary to create holes or cut specific shapes on the lens barrel during surface processing, laser cutting technology can be used.

[0061] In some embodiments, the steps for inspecting the quality of the lens barrel include magnetic property testing, mechanical property testing, and component compliance testing.

[0062] The magnetic performance testing includes surface magnetic flux density testing and hysteresis loop analysis. Specifically, surface magnetic flux density testing involves measuring the magnetic flux density on the surface of the lens barrel using a gaussmeter to confirm whether it meets the design requirements for magnetic performance. Hysteresis loop analysis involves analyzing the hysteresis loop of the lens barrel using a vibrating sample magnetometer (VSM) to evaluate its magnetic performance parameters such as coercivity and remanence.

[0063] The mechanical performance testing includes tensile strength testing and impact toughness testing. Specifically, the tensile strength test includes: performing a tensile strength test on the lens barrel according to ISO standards to ensure that the tensile strength of the lens barrel is ≥40MPa; the impact toughness test includes: performing an impact toughness test on the lens barrel according to ISO standards to ensure that the impact toughness of the lens barrel is ≥5kJ / m².

[0064] The component compliance testing includes SVHC substance testing, which, in accordance with the EU REACH regulation, tests the content of substances of very high concern (SVHCs) in the lens barrel material to ensure that the content is below the limit (<0.1%). Optionally, the testing can be performed using chemical analysis methods, such as gas chromatography-mass spectrometry (GC-MS) or high performance liquid chromatography (HPLC), to identify and quantify SVHC substances in the material.

[0065] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A lens barrel for a camera module, characterized in that, include: An integrally formed lens barrel body, the lens barrel body including a magnetic part and a mounting hole for carrying a lens, the magnetic part being magnetic.

2. The lens barrel according to claim 1, characterized in that, The lens barrel body is injection molded from magnetic material, and the magnetic part is magnetic through a magnetization process.

3. The lens barrel according to claim 2, characterized in that, The magnetic material includes resin and magnetic filler.

4. The lens barrel according to claim 3, characterized in that, The resin includes one or more of polyphenylene sulfide, polycarbonate, polyamide, polypropylene, and acrylonitrile-butadiene-styrene, and the resin accounts for 30%-80% of the weight of the magnetic material.

5. The lens barrel according to claim 3, characterized in that, The magnetic filler includes one or more of ferrite, rare earth, and metal fiber, and the magnetic filler accounts for 20%-70% of the weight of the magnetic material.

6. The lens barrel according to claim 3, characterized in that, The magnetic material also includes auxiliary additives, which include one or more of plasticizers and lubricants, and the weight percentage of the auxiliary additives in the magnetic material is 0%-30%.

7. A camera module, characterized in that, The lens barrel includes the lens barrel according to any one of claims 1-6, wherein a plurality of lenses are disposed therein.

8. A method for manufacturing a lens barrel, characterized in that, The method for manufacturing the lens barrel according to any one of claims 1-6 comprises the following steps: Take an appropriate amount of resin and magnetic filler, and mix the resin and magnetic filler in an environment below the temperature threshold to form a magnetic material; The magnetic material is added to an injection molding machine, and the magnetic material is used to injection mold a first semi-finished product in a molten state with the shape of a mirror barrel. A magnetic field is applied to the first semi-finished product to cause the magnetic filler to gather in a preset magnetic area. After cooling, a second semi-finished product with a solid state and a mirror tube shape is obtained. The second semi-finished product is magnetized to obtain the finished lens barrel.

9. The method for manufacturing a lens barrel according to claim 8, characterized in that, The process of taking an appropriate amount of resin and magnetic filler, and mixing the resin and magnetic filler in an environment below a temperature threshold to form a magnetic material includes: Take an appropriate amount of resin and dry it. Take an appropriate amount of magnetic filler and perform surface treatment on the magnetic filler; Take an appropriate amount of auxiliary additives, put the resin, magnetic filler and auxiliary additives into a mixer and mix them, and control the mixing temperature below the temperature threshold to obtain a magnetic material.

10. The method for manufacturing a lens barrel according to claim 8, characterized in that, The step of adding the magnetic material to an injection molding machine and using the injection molding machine to form a first semi-finished product in a molten state with a lens barrel shape includes: The magnetic material is added to an injection molding machine, and the magnetic material is melted and mixed using the injection molding machine, so that the magnetic material becomes molten. The magnetic material in a molten state is injected through the injection molding equipment to form a first semi-finished product that is in a molten state and has the shape of a mirror barrel.

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