Voice coil motor with gradual avoidance structure

Abstract

The utility model relates to a voice coil motor with gradual change avoiding structure, including shell, the base that combines with shell, the magnet component fixed in the shell, the carrier that moves in the shell set up, the coil that winds on the carrier, and the upper spring and lower spring that are connected between the carrier and shell and / or base, the upper surface of carrier is provided with the avoiding structure for avoiding the upper spring, the recess depth of avoiding structure gradually increases from the fixed connection area corresponding to the upper spring to the direction corresponding to the elastic arm region of upper spring. The utility model provides a voice coil motor with gradual change avoiding structure, through setting the avoiding structure of depth gradual change on the carrier upper surface, has realized the optimized distribution to spring movement space, thereby has guaranteed the smoothness of movement, and has improved the structural strength and overall reliability of carrier significantly.

Description

Technical Field

[0001] This utility model relates to the field of voice coil motors, and more specifically, to a voice coil motor with a gradual avoidance structure. Background Technology

[0002] Voice coil motors, as precision drive devices, are widely used in electronic devices such as camera modules to drive lenses for focusing. In a typical voice coil motor structure, the carrier is suspended inside a housing by upper and lower springs. When the coil is energized, it interacts with a magnet assembly, driving the carrier and lens to move along the optical axis. During this process, the upper spring deforms and oscillates with the movement of the carrier. To prevent the spring from contacting and interfering with the carrier, appropriate avoidance structures are usually provided on the carrier.

[0003] In existing designs, the clearance structure on the carrier may have insufficient design considerations. For example, if the size of the clearance space does not match the actual deformation requirements of different areas of the spring, it may cause several problems. On the one hand, in areas with large spring deformation, insufficient clearance space may still pose a risk of interference, potentially affecting the smoothness and stability of motor operation. On the other hand, in the root region where spring deformation is small, excessive clearance space may unnecessarily weaken the structural strength of the carrier at that location, increasing the likelihood of damage upon external impact. Therefore, a carrier design that can more rationally balance clearance requirements and structural strength is of positive significance for improving the overall performance and reliability of voice coil motors. Utility Model Content

[0004] In view of this, the present invention provides a voice coil motor with a gradually changing avoidance structure. By setting an avoidance structure with a gradually changing depth on the upper surface of the carrier, the optimal allocation of the spring movement space is achieved, thereby significantly improving the structural strength and overall reliability of the carrier while ensuring smooth movement.

[0005] The objective of this utility model is achieved through the following technical solution: A voice coil motor with a gradually avoiding structure includes a housing, a base coupled to the housing, a magnet assembly fixed inside the housing, a carrier movably disposed inside the housing, a coil wound on the carrier, and an upper spring and a lower spring connected between the carrier and the housing and / or the base. The upper surface of the carrier is provided with an avoidance structure for avoiding the upper spring, and the recess depth of the avoidance structure gradually increases from the fixed connection area corresponding to the upper spring to the elastic arm area corresponding to the upper spring.

[0006] By incorporating a clearance structure on the upper surface, with the recess depth gradually increasing from the fixed connection area to the elastic arm area, this design effectively adapts to the deformation characteristics of the upper spring in different regions. The fixed connection area exhibits less deformation, and the shallower recess depth provides necessary clearance space to avoid motion interference; the elastic arm area experiences greater deformation, and the gradually deepening recess depth ensures ample clearance to prevent collisions. This gradient structure optimizes the use of carrier space, enhancing structural integrity and strength by retaining more material in the fixed connection area, improving impact resistance, and reducing stress concentration points. This makes the carrier less prone to cracking or deformation upon impact, extending the motor's lifespan. Simultaneously, this design simplifies the assembly process, allowing for more precise fit, reducing production adjustment steps, improving efficiency and consistency, and enhancing durability while ensuring smooth movement, providing a reliable guarantee for stable operation.

[0007] Preferably, the avoidance structure is a gradient groove or gradient slope formed on the upper surface of the carrier.

[0008] Gradient grooves or gradient ramps, as specific implementation methods, can achieve gradual changes in depth with simple manufacturing processes, providing uniform clearance space, reducing local stress concentration, and lowering the risk of fatigue damage to the carrier. Gradient grooves smoothly transition depth through continuous recessed areas, while gradient ramps connect different depth areas in an inclined manner, optimizing hydrodynamic characteristics and potentially reducing air resistance during high-speed motion. Both forms facilitate integrated molding, reducing additional parts or assembly steps, improving production efficiency and cost-effectiveness, while allowing flexible adjustment of clearance dimensions to accommodate different upper spring specifications, enhancing motor versatility and adaptability.

[0009] Preferably, the cross-sectional profile of the gradient groove or gradient slope in the extension direction is wedge-shaped or arc-shaped.

[0010] Wedge-shaped or arc-shaped profiles offer optimized geometry, effectively distributing stress and improving motion compatibility. Wedge-shaped profiles gradually change depth in a straight line, facilitating manufacturing control and replication, reducing machining errors, providing linear clearance support, and avoiding localized interference. Arc-shaped profiles smoothly transition depth with curves, reducing stress concentration points, enhancing fatigue resistance, and extending service life. Both profile types improve the stiffness and stability of clearance structures, distribute loads evenly, reduce vibration and noise, facilitate design optimization, achieve a better performance balance, and improve reliability and user experience.

[0011] Preferably, the thickness of the carrier at the avoidance structure is gradually set, being thicker near the fixed connection area and gradually thinning towards the elastic arm area.

[0012] The gradual change in solid thickness is coordinated with the varying depth of the clearance structure, optimizing the structural strength and weight distribution of the carrier. The thicker fixed connection area provides additional material support, enhancing impact resistance and load-bearing capacity, and reducing the risk of cracks or deformation due to stress concentration. The gradual thinning towards the elastic arm area reduces weight, maintains clearance space, lowers inertia, and improves response speed and energy efficiency. This design balances material usage, avoids excessive processing waste, makes the carrier easier to form and cool, reduces internal defects, and simultaneously disperses energy during impact, reducing localized damage and improving durability and safety.

[0013] Preferably, the carrier has at least one reinforcing rib around the periphery of the avoidance structure.

[0014] Reinforcing ribs provide additional structural support around the perimeter of the avoidance structure, compensating for reduced material coverage and enhancing overall stiffness and resistance to deformation. Their perimeter distribution forms a frame-like protection, reducing edge stress concentration under movement or impact, and preventing crack propagation or fatigue failure. This design maintains lightweight construction while improving mechanical strength and optimizing dynamic performance, such as reducing vibration and misalignment during high-speed focusing. The reinforcing ribs are achieved through integrated molding, without increasing production costs, improving component consistency and reliability, while guiding stress dispersion, improving durability, and ensuring stable avoidance functionality.

[0015] Preferably, the carrier is a lens barrel for mounting the lens.

[0016] The lens barrel, serving as a carrier, is directly applicable to optical imaging systems such as cameras, where high precision and stability are required. The gradient avoidance structure on the upper surface prevents interference with the upper spring during focusing, ensuring smooth and precise motion, improving image quality and focusing speed. The dedicated lens barrel design allows for better thermal management and size optimization, reducing unnecessary mass through the avoidance structure and enhancing adaptability to compact spaces. Furthermore, it facilitates integration with lens modules, simplifying the assembly process, reducing error points, and improving production efficiency and consistency, making it suitable for the consumer electronics market.

[0017] Preferably, the magnet assembly is fixed to the inner peripheral wall of the housing.

[0018] The magnet assembly, fixed around the inner wall of the housing, provides a uniform magnetic field distribution, ensuring consistent electromagnetic force when the coil is energized, thus enhancing the smoothness and accuracy of carrier movement. This arrangement optimizes magnetic circuit efficiency, reduces magnetic leakage and energy loss, and improves energy efficiency and output performance. The surrounding fixation facilitates installation and securement, achieving reliable connections through a simple mechanical structure, reducing the risk of loosening, and maintaining stability in vibrating environments. It also allows for a compact motor layout, saving space and increasing structural rigidity, making it suitable for portable devices.

[0019] Preferably, the lower spring is clamped between the carrier and the base.

[0020] The lower spring clamp provides stable suspension and support between the carrier and the base, working in conjunction with the upper spring to ensure motion balance and alignment, reducing tilting or misalignment. This arrangement distributes load and vibration, absorbing shock energy through its elastic properties and protecting components from damage. The clamping design simplifies assembly, allowing for press-fit or adhesive fastening, improving production efficiency and connection reliability. Furthermore, the lower spring acts as a damping element, reducing noise and wear, extending service life, and enhancing performance consistency in frequent start-stop applications.

[0021] Preferably, the coil interacts with the magnet assembly when energized, generating an electromagnetic force that drives the carrier to move along its optical axis.

[0022] The electromagnetic interaction between the coil and magnet components enables efficient energy conversion, driving the carrier to move precisely along the optical axis, which is crucial for focusing or zoom applications. An optimized obstacle avoidance structure facilitates smoother movement, reduces friction and interference energy loss, and improves response speed and positioning accuracy. This design allows for precise adjustment of the carrier position via current control, enhancing autofocus performance, such as stable operation in low-light conditions. The high efficiency of the electromagnetic drive helps reduce power consumption and heat generation, extending battery life and reducing the risk of thermal deformation, thus improving applicability and reliability.

[0023] Preferably, the gradually increasing depth avoidance structure is configured to prevent any part of the upper spring from contacting and interfering with the carrier during carrier movement.

[0024] This configuration ensures comprehensive protection of the avoidance structure throughout the entire range of motion, preventing any part of the upper spring from contacting the carrier and eliminating the risk of performance degradation or damage due to interference. The gradually increasing depth design adapts to the deformation characteristics of the upper spring, providing minimal necessary avoidance in the fixed connection area and ample space in the elastic arm area, optimizing the carrier structural integrity and reducing unnecessary material removal. This comprehensive avoidance function improves reliability and durability, for example, by preventing noise, wear, or failure caused by collisions in high-speed or high-load applications. Simultaneously, it simplifies the design verification process, reduces testing and adjustment time, improves production efficiency and yield, and ensures consistent performance under different conditions.

[0025] The advantages of this utility model compared to the prior art are: The voice coil motor with a gradually varying avoidance structure of this invention exhibits many beneficial effects through its gradually varying recess depth avoidance structure set on the upper surface of the carrier.

[0026] First, this design achieves a good balance between motion avoidance and structural strength. The depth of the recess in the avoidance structure gradually increases from the fixed connection area of ​​the upper spring to its elastic arm area. This gradual change can more effectively adapt to the deformation characteristics of different parts of the spring. In the fixed connection area with less deformation, the shallower recess provides the necessary avoidance space while retaining more carrier material, which helps to enhance the local strength of this area and makes the carrier less prone to cracking under external impact. In the elastic arm area with greater deformation, the gradually deepening recess provides more space for swinging, thereby reducing the possibility of contact interference between the upper spring and the carrier, ensuring the smooth and stable movement of the carrier.

[0027] Secondly, this smooth transition in depth helps reduce stress concentration. Compared to structures with abrupt changes in depth, a gradual transition in depth allows for a more uniform distribution of loads and stresses, which helps delay material fatigue and extend the service life of the carrier and the entire motor.

[0028] Furthermore, this structural design also has a positive impact on manufacturing processes and product consistency. The one-piece, gradually changing avoidance structure typically eliminates the need for additional complex manufacturing steps, which facilitates quality control during production and promotes improved assembly efficiency and product yield. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded view of a voice coil motor with a gradual avoidance structure according to an embodiment of the present invention.

[0031] Figure 2 This is a partial structural diagram of the carrier 4 and the upper spring 3 in one embodiment of the present invention.

[0032] Labeling explanation: 1. Outer shell, 2. Magnet assembly, 3. Upper spring, 31. Fixed connection area, 32. Elastic arm area, 4. Carrier, 41. Avoidance structure, 5. Base, 6. Lower spring, 7. Coil. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and 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. Therefore, they should not be construed as limitations on this application.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0037] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0038] This embodiment provides a voice coil motor with a gradually avoiding structure, including a housing 1, a base 5 connected to the housing 1, a magnet assembly 2 fixed inside the housing 1, a carrier 4 movably disposed inside the housing 1, a coil 7 wound on the carrier 4, and an upper spring 3 and a lower spring 6 connected between the carrier 4 and the housing 1 and / or the base 5. The upper surface of the carrier 4 is provided with an avoidance structure 41 for avoiding the upper spring 3. The recess depth of the avoidance structure 41 gradually increases from the fixed connection area 31 corresponding to the upper spring 3 to the elastic arm area 32 corresponding to the upper spring 3.

[0039] By incorporating a clearance structure 41 on the upper surface, with the recess depth gradually increasing from the fixed connection area 31 to the elastic arm area 32, this design effectively adapts to the deformation characteristics of the upper spring in different regions. The fixed connection area 31, as the part directly connected to the carrier, has relatively small deformation; therefore, the shallow recess depth is sufficient to provide the necessary clearance space, preventing contact interference between the upper spring and the carrier. Simultaneously, the elastic arm area 32, as the main deformation part of the upper spring, has larger deformation; the gradually deepening recess depth ensures sufficient clearance space in this area, preventing collisions between the upper spring and the carrier during swing. This gradual clearance structure 41 not only optimizes the space utilization of the carrier but also enhances the structural integrity of the fixed connection area 31 by maintaining a greater proportion of material, thereby improving the overall strength and impact resistance of the carrier. In the operation of a voice coil motor with a gradual clearance structure, the carrier frequently needs to withstand external impacts or vibrations. This structure, through reasonable material distribution, reduces stress concentration points, making the carrier less prone to cracking or deformation under impact, thus extending the motor's service life. Furthermore, this design simplifies the assembly process because the gradual change in the clearance structure 41 allows for more precise fit, reducing adjustment steps in the production process and contributing to improved production efficiency and product consistency. Overall, this solution ensures smooth movement while enhancing the durability of the carrier, providing a reliable guarantee for the stable operation of voice coil motors with gradual clearance structures in various applications.

[0040] In this embodiment, the avoidance structure 41 is a gradient groove or gradient slope formed on the upper surface of the carrier 4.

[0041] Gradient grooves or gradient ramps, as a specific implementation of the avoidance structure 41, can achieve a gradually changing depth effect with a simple and efficient manufacturing process. Gradient grooves form a continuous recessed area on the upper surface of the carrier through machining or injection molding, with its depth smoothly transitioning from the fixed connection area 31 to the elastic arm area 32. This helps provide uniform avoidance space during upper spring movement, reducing local stress concentration and thus lowering the risk of carrier fatigue damage. Gradient ramps connect different depth areas in an inclined manner, making the avoidance structure 41 easier to manufacture and inspect, while optimizing the carrier's hydrodynamic characteristics and potentially reducing air resistance during high-speed movement. Both structural forms are suitable for mass production because they can be integrally molded with other features of the carrier, reducing additional parts or assembly steps and improving production efficiency and cost-effectiveness. Furthermore, the design of gradient grooves or gradient ramps allows for more flexible adjustment of the avoidance dimensions to accommodate upper springs of different specifications, enhancing the versatility and adaptability of voice coil motors with gradient avoidance structures.

[0042] In this embodiment, the cross-sectional profile of the gradient groove or gradient slope in the extension direction is wedge-shaped or arc-shaped.

[0043] The wedge-shaped or arc-shaped cross-sectional profile provides an optimized geometry for the avoidance structure 41, enabling more effective stress distribution and improved motion compatibility. The wedge-shaped profile, with its gradually changing depth in a straight line, makes the avoidance structure 41 easy to control and replicate during manufacturing, reducing machining errors. It also provides linear avoidance support during spring oscillation, preventing localized interference between the carrier and spring caused by sudden depth changes. The arc-shaped profile, with its curved transition, further smooths the depth change, reduces stress concentration points, and enhances the carrier's fatigue resistance, especially in applications with frequent start-stop cycles, extending motor lifespan. Both profile forms contribute to improving the overall stiffness and stability of the avoidance structure 41, reducing carrier vibration and noise during motion by evenly distributing the load. Furthermore, the wedge-shaped or arc-shaped profile facilitates optimization during the design and simulation phases, allowing engineers to adjust parameters according to specific applications to achieve a better performance balance, thereby improving the reliability and user experience of voice coil motors with gradually changing avoidance structures.

[0044] In this embodiment, the thickness of the carrier 4 at the avoidance structure 41 is gradually set, being thicker near the fixed connection area 31 and gradually thinning towards the elastic arm area 32.

[0045] The gradual thickness of the solid body, coordinated with the depth variation of the avoidance structure 41, further optimizes the structural strength and weight distribution of the carrier. Near the fixed connection area 31, the thicker solid body provides additional material support, enhancing the impact resistance and load-bearing capacity of this area and reducing the risk of cracking or deformation due to stress concentration at the upper spring fixing point. As the thickness gradually decreases towards the elastic arm area 32, the carrier weight is reduced while maintaining sufficient avoidance space. This helps reduce overall inertia and improves the response speed and energy efficiency of the voice coil motor with the gradual avoidance structure. This gradual thickness design also avoids over-processing or waste by balancing material usage, making the carrier easier to shape and cool during production and reducing the formation of internal defects such as shrinkage marks or bubbles. Furthermore, the reasonable distribution of the solid body thickness helps disperse energy in impact events, reducing localized damage and thus improving the motor's durability and safety performance, making it suitable for applications with high reliability requirements.

[0046] like Figure 2 As shown, the upper surface of the carrier 4 is provided with a relief structure 41, which is a gradually changing groove with a wedge-shaped cross-section. The depth of the groove gradually increases from the left side (corresponding to the fixed connection area 31 of the upper spring 3) to the right side (corresponding to the elastic arm area 32 of the upper spring 3). The fixed connection area 31 of the upper spring 3 is fixed to the platform of the carrier 4 by welding or bonding, and its elastic arm area 32 is suspended above the gradually changing groove, thereby obtaining sufficient deformation space.

[0047] In this embodiment, the carrier 4 has at least one reinforcing rib around the periphery of the avoidance structure 41.

[0048] The reinforcing ribs, placed around the perimeter of the avoidance structure 41, provide additional structural support, effectively compensating for the material reduction area caused by the avoidance, and enhancing the overall rigidity and deformation resistance of the carrier. Distributed around the perimeter, the reinforcing ribs form a frame-like protection, reducing stress concentration at the edges of the avoidance structure 41 under motion or external impact, preventing crack propagation or localized fatigue failure. This design also allows the carrier to maintain a lightweight profile while possessing high mechanical strength, thereby optimizing the dynamic performance of the voice coil motor with the gradient avoidance structure, such as reducing vibration and offset during high-speed focusing. The addition of reinforcing ribs is typically achieved through integral molding, without significantly increasing production costs or complexity, but rather improving component consistency and reliability. Furthermore, the reinforcing ribs can guide stress along a predetermined path, further improving the carrier's durability and ensuring stable avoidance function during long-term use.

[0049] In this embodiment, the carrier 4 is a lens barrel for mounting the lens.

[0050] By embodying the lens barrel as a carrier, the voice coil motor with its gradient avoidance structure can be directly applied to optical imaging systems, such as cameras or photographic equipment. The lens barrel, as the support structure for the lens, requires extremely high precision and stability. By incorporating the gradient avoidance structure 41 on its upper surface, the lens barrel avoids interference with the upper spring during lens focusing, ensuring smooth and precise movement, thereby improving image quality and focusing speed. The dedicated design of the lens barrel also allows for better thermal management and size optimization, such as reducing unnecessary mass through the avoidance structure 41, enhancing adaptability in compact spaces. Furthermore, the realization of the lens barrel as a carrier facilitates integration with other components of the lens module, simplifying the overall assembly process, reducing potential error points, improving production efficiency and product consistency, and making it suitable for the mass-market consumer electronics sector.

[0051] In this embodiment, the magnet assembly 2 is fixed around the inner peripheral wall of the outer casing 1.

[0052] The design of the magnet assembly, which is fixed around the inner wall of the housing, provides a uniform magnetic field distribution, ensuring that the coil is driven by a consistent electromagnetic force when energized, thereby enhancing the smoothness and precision of the carrier's movement. This arrangement optimizes magnetic circuit efficiency, reduces magnetic leakage and energy loss, and improves the energy efficiency and output performance of voice coil motors with a gradually avoiding clearance structure. The surrounding fixation also facilitates the installation and securement of the magnet assembly, achieving a reliable connection through a simple mechanical structure, reducing the risk of loosening or displacement, and maintaining stability, especially in vibrating environments. Furthermore, this design allows for a more compact motor layout, saving space and increasing the rigidity of the overall structure, making it suitable for portable devices with strict size and weight requirements.

[0053] In this embodiment, the lower spring 6 is clamped between the carrier 4 and the base 5.

[0054] The lower spring, clamped between the carrier and the base, provides stable suspension and support. Working in conjunction with the upper spring, it ensures the carrier remains balanced and aligned during movement, reducing tilting or shifting. This arrangement helps distribute load and vibration, absorbing some impact energy through the lower spring's elastic properties, protecting the carrier and other components from damage. The clamping design also simplifies the assembly process, allowing the lower spring to be fixed by press-fitting or bonding, improving production efficiency and connection reliability. Furthermore, as a damping element, the lower spring reduces noise and wear, extends motor life, and enhances performance consistency in applications with frequent start-stop cycles.

[0055] In this embodiment, the coil 7 interacts with the magnet component 2 when energized, generating an electromagnetic force that drives the carrier 4 to move along its optical axis.

[0056] The electromagnetic interaction between the coil and the magnet assembly enables highly efficient energy conversion, driving the carrier to move precisely along the optical axis, which is crucial for focusing or zooming applications. By optimizing the avoidance structure 41, the carrier movement is smoother, reducing energy loss due to friction and interference, thereby improving the motor's response speed and positioning accuracy. This design also allows for precise adjustment of the carrier position by controlling the current, enhancing the performance of autofocus systems, such as maintaining stable operation in low-light conditions. Furthermore, the efficiency of the electromagnetic drive helps reduce power consumption and heat generation, extending battery life and reducing the risk of thermal deformation, thus improving the applicability and reliability of voice coil motors with a gradient avoidance structure in various electronic devices.

[0057] In this embodiment, the gradually increasing depth avoidance structure 41 is configured to prevent any part of the upper spring 3 from contacting and interfering with the carrier 4 when the carrier 4 moves.

[0058] This configuration ensures that the avoidance structure 41 provides comprehensive protection throughout the entire range of motion of the carrier, preventing any part of the upper spring from contacting the carrier, thereby eliminating the risk of performance degradation or damage due to interference. Through a design with gradually increasing depth, the avoidance structure 41 adapts to the deformation characteristics of the upper spring, providing minimal necessary clearance in the fixed connection area 31 and ample space in the elastic arm area 32. This optimizes the structural integrity of the carrier and reduces unnecessary material removal. This comprehensive avoidance function helps improve the reliability and durability of voice coil motors with a gradually increasing avoidance structure, for example, avoiding noise, wear, or failure caused by spring-carrier collisions in high-speed or high-load applications. Furthermore, this configuration simplifies the design verification process, reduces testing and adjustment time, improves production efficiency and product yield, while ensuring consistent performance under different operating conditions.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A voice coil motor with a gradual avoidance structure, comprising a housing (1), a base (5) coupled to the housing (1), a magnet assembly (2) fixed within the housing (1), a carrier (4) movably disposed within the housing (1), a coil (7) wound on the carrier (4), and an upper spring (3) and a lower spring (6) connected between the carrier (4) and the housing (1) and / or the base (5), characterized in that, The upper surface of the carrier (4) is provided with a clearance structure (41) for avoiding the upper spring (3). The recess depth of the clearance structure (41) gradually increases from the fixed connection area (31) corresponding to the upper spring (3) towards the elastic arm area (32) corresponding to the upper spring (3).

2. The voice coil motor with a gradual avoidance structure according to claim 1, characterized in that, The avoidance structure (41) is a gradient groove or gradient slope formed on the upper surface of the carrier (4).

3. The voice coil motor with a gradual avoidance structure according to claim 2, characterized in that, The cross-sectional profile of the gradient groove or gradient slope in the extending direction is wedge-shaped or arc-shaped.

4. The voice coil motor with a gradual avoidance structure according to claim 1, characterized in that, The thickness of the carrier (4) at the avoidance structure (41) is gradually set, being thicker near the fixed connection area (31) and gradually thinning towards the elastic arm area (32).

5. The voice coil motor with a gradual avoidance structure according to claim 1, characterized in that, The carrier (4) has at least one reinforcing rib on the periphery of the avoidance structure (41).

6. The voice coil motor with a gradual avoidance structure according to any one of claims 1 to 5, characterized in that, The carrier (4) is a lens barrel used to mount the lens.

7. The voice coil motor with a gradual avoidance structure according to any one of claims 1 to 5, characterized in that, The magnet assembly (2) is fixed around the inner peripheral wall of the outer shell (1).

8. The voice coil motor with a gradual avoidance structure according to any one of claims 1 to 5, characterized in that, The lower spring (6) is sandwiched between the carrier (4) and the base (5).

9. The voice coil motor with a gradual avoidance structure according to any one of claims 1 to 5, characterized in that, When the coil (7) is energized, it interacts with the magnet assembly (2) to generate an electromagnetic force that drives the carrier (4) to move along its optical axis.

10. The voice coil motor with a gradual avoidance structure according to claim 1, characterized in that, The gradually increasing depth avoidance structure (41) is configured to prevent any part of the upper spring (3) from contacting or interfering with the carrier (4) when the carrier (4) moves.

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