An auto-focusing driving motor and a camera device

Abstract

The utility model relates to an automatic focusing drive motor and camera device, automatic focusing drive motor includes base, shell, magnet, carrier, coil, upper spring and lower spring, the magnet is fixed in the inner wall of shell, the coil is fixed on the carrier, the carrier is suspended in the shell through the upper spring and the lower spring, the periphery of the central aperture of base is provided with at least one gap. The utility model provides an automatic focusing drive motor and camera device, reduces the assembly pollution risk through the physical structure optimization. Specifically through setting gap structure at the periphery of the central aperture of base, the gap forms the physical channel in the base entity structure, so that the jig can pass through the gap from the bottom of the motor and contact the carrier. The design changes the traditional force mode of "pressing spring from top to bottom" into "lifting carrier from bottom to top", avoiding the contact possibility of the jig and the dispensing area of the upper spring from the physical level.

Description

Technical Field

[0001] This utility model relates to the field of optical device driving technology, and in particular to an autofocus drive motor and a camera device. Background Technology

[0002] As the core driving component of the camera module, the autofocus drive motor's assembly precision directly affects the lens's focusing performance. In traditional motor structures, the central opening of the base uses a continuously closed ring design. This structure causes the base to completely obscure the bottom of the carrier, necessitating a specific process during assembly: a fixture must be used to directly press the inner ring of the upper spring from above, forcing the upper spring to adhere to the top of the carrier before applying adhesive for fixation.

[0003] This process faces two interrelated technical bottlenecks: 1. Operation path limitation: Since the base has no physical channel, the fixture cannot contact the carrier from the bottom, and the main force application point is located on the surface of the upper spring; 2. Risk of contamination transmission: Direct contact between the fixture and the upper spring adhesive application area may result in uncured adhesive adhering to the fixture's working surface. When the fixture is reused for subsequent product assembly, residual adhesive may detach and fall into the spring gaps, carrier movement tracks, or magnetic gap spaces.

[0004] The aforementioned problems may lead to increased drag on the carrier movement, trajectory deviation, and other abnormal conditions, thereby affecting the stability of focusing accuracy. Furthermore, frequent interruptions in production for cleaning fixtures are necessary to reduce contamination risks, hindering mass production efficiency. Therefore, a solution that fundamentally alters the force application path is urgently needed. Utility Model Content

[0005] In view of this, the present invention provides an improved autofocus drive motor and camera device, which reduces the risk of assembly contamination through physical structure optimization.

[0006] The objective of this utility model is achieved through the following technical solution: An autofocus drive motor includes a base, a housing, a magnet, a carrier, a coil, an upper spring, and a lower spring. The magnet is fixed to the inner wall of the housing, the coil is fixed to the carrier, and the carrier is suspended inside the housing by the upper spring and the lower spring. At least one notch is provided around the central opening of the base.

[0007] The core innovation lies in the notch structure around the central opening of the base. This design allows the base to maintain overall structural strength while providing an operating channel for external fixtures. Traditional bases, with their completely closed edges around the central opening, prevent fixtures from directly contacting the carrier from the bottom, necessitating pressing the spring downwards during assembly, which easily leads to glue contamination of the fixture. This structure breaks the base's complete obstruction of the carrier's bottom through the notch, allowing the fixture to extend from below and act on the carrier. This physical channel fundamentally changes the direction of force application on the carrier, transforming the traditional "pressing down on the spring" assembly mode into an "upward pushing on the carrier" mode. Since the fixture no longer needs to contact the spring's adhesive application area, it helps reduce the risk of glue contamination. Simultaneously, the notch design requires minimal structural modification to the base itself, does not affect its basic function of supporting the outer shell and magnets, and requires no additional parts or complex processes. This feature provides fundamental structural support for subsequent assembly process innovations and is a key physical prerequisite for solving the glue residue problem.

[0008] Preferably, the bottom of the carrier is provided with a protrusion corresponding to the position of the notch on the base.

[0009] A protrusion structure corresponding to the notch in the base is added to the bottom of the carrier, forming a collaborative innovation with the notch. The protrusion serves as a dedicated force-bearing point on the carrier, its position strictly corresponding to the notch, ensuring the fixture can accurately contact the protrusion through the notch. Traditional carrier bottoms are flat or non-directional structures, which can easily lead to uneven force and tilting if directly lifted. The protrusion design concentrates the fixture's force on a specific protruding part, significantly improving the stability of the lifting process. The protrusion's height is slightly higher than the carrier's bottom surface, preventing accidental contact between other parts of the carrier and the base, ensuring a smooth lifting path. Furthermore, as a localized reinforcement structure, the protrusion can withstand repeated lifting operations without easily deforming, extending the carrier's service life. This feature, combined with the base notch, constructs a precise force transmission path of "fixture-notch-protrusion," making the carrier's lifting action more controllable, providing a reliable physical basis for the carrier's precise positioning, and is the core guarantee for achieving interference-free contact between the carrier and the spring.

[0010] Preferably, the number of notches on the base is four.

[0011] The four notches on the base are an optimized design element of the core innovation. These four notches are symmetrically distributed around the central opening on the base, forming a balanced force transmission channel. Compared to a single notch that might cause the carrier to tilt during lifting, the four-notch layout allows the jig pins to act simultaneously on the four corner bosses of the carrier, achieving complete horizontal lifting. The symmetrical distribution also disperses the stress on each pin, reducing the risk of deformation caused by localized stress concentration. The uniform circumferential arrangement of the four notches eliminates the limitation on the installation angle, improving the tolerance of the assembly process. Simultaneously, this number of notches, while ensuring lifting stability, minimizes the weakening of the base's structural integrity and avoids affecting its rigidity due to excessive openings. The four-notch design has been proven in engineering practice to be an optimal solution that balances reliability and process efficiency, effectively balancing structural strength and operational convenience.

[0012] Preferably, the boss protrudes from the bottom surface of the carrier.

[0013] The requirement that the boss protrude beyond the bottom surface of the carrier is a key constraint on the load-bearing structure. This protruding design makes the boss the highest point on the carrier's bottom, ensuring that the jig pins preferentially contact the boss rather than other areas of the carrier's bottom surface. This physical isolation avoids particulate contamination from accidental friction between the carrier's bottom surface and the base, while also reducing lifting resistance. The operating space created by the boss height difference allows for minor positioning deviations of the jig pins without affecting functionality. The protruding structure also increases the jig's contact area, dispersing localized pressure and preventing indentations on the carrier surface. This feature makes the boss a dedicated lifting interface, strictly limiting the force to a predetermined area and protecting the carrier's precision optical mounting surfaces from mechanical damage. The optimized boss height balances lifting stroke requirements with the overall thinness requirements of the motor, a necessary condition for reliable assembly of ultra-thin motors.

[0014] Preferably, the notch extends through the thickness direction of the base.

[0015] Emphasizing the penetrating characteristic of the notch ensures the physical feasibility of the fixture channel. Penetration along the thickness direction creates a true through-hole structure, eliminating interference with the movement of the fixture's ejector pins. If the notch is not penetrating, residual material may block the ejector pins or cause them to deviate, compromising lifting accuracy. The penetrating design allows the ejector pins to act perpendicularly on the boss, ensuring a force transmission path without angular deviation and guaranteeing the carrier's linear ascent. The through-hole structure also facilitates machining and cleaning, preventing debris accumulation from affecting motor performance. This feature is the fundamental guarantee for the notch's functionality, upgrading the base from a simple support component to an intelligent structure with process guidance capabilities.

[0016] Preferably, the inner ring of the upper spring is fixedly connected to the upper part of the carrier.

[0017] Clearly defining the connection between the inner ring of the upper spring and the upper part of the carrier is a fundamental feature of the motor's motion mechanism. This connection allows for precise transmission of carrier motion to the spring, ensuring linear control of lens focusing. The inner ring connection maximizes the utilization of the spring's deformation space, providing uniform suspension support force. The upper connection position avoids the carrier's optical path, preventing mechanical interference with imaging. The robust, fixed connection ensures it won't loosen under high-frequency movement, maintaining the motor's long-term stability. This feature is the structural basis for achieving optical image stabilization and high-precision focusing.

[0018] Preferably, the inner ring of the lower spring is fixedly connected to the lower part of the carrier, and the outer ring of the lower spring is fixedly connected to the base.

[0019] The dual connection of the lower springs defines a complete motion suspension system. The inner ring connects to the lower part of the carrier, providing basic support, while the outer ring connects to the base, forming a fixed reference frame. This layout maintains tension balance between the upper and lower springs, resulting in a more stable motion trajectory. The lower connection point and the upper connection point create symmetrical force distribution, reducing the risk of carrier tilting. The fixed outer ring base ensures precise alignment of the spring system with the motor housing, providing a stable operating environment for magnetic field drive. This feature is crucial for achieving long-stroke focusing, ensuring the carrier maintains attitude stability during long-distance movement.

[0020] Preferably, the outer casing is fixedly connected to the base.

[0021] Establishing a fixed connection between the outer casing and the base forms the core framework of the motor. This connection integrates the magnet fixing assembly and the carrier suspension system into a unified whole, ensuring that the magnetic gap accuracy is not affected by assembly errors. A robust connection suppresses operational vibration and reduces noise generation. The base serves as a mounting reference surface, allowing for accurate positioning of the outer casing and guaranteeing optimal coupling efficiency between the magnetic circuit and the coil. This feature is the structural foundation for maintaining the motor's mechanical precision and electromagnetic performance, directly affecting focusing speed and accuracy.

[0022] Preferably, the shape of the boss is adapted to the shape of the notch, so that the fixture can contact and lift the boss through the notch.

[0023] Specifying the shape fit between the boss and the notch is a key design feature for improving assembly accuracy. Shape fit includes geometric contour matching and dimensional tolerance accommodating, ensuring that the jig pins pass unimpeded through the notch and fully contact the boss's working surface. The fit design eliminates lateral displacement during lifting, ensuring the carrier moves strictly vertically. This precision fit reduces the number of adjustments needed, increasing production line cycle time. Specific shape combinations can also serve as a mistake-proofing design, preventing reverse installation of components. This feature upgrades the notch and boss from independent structures to a precision-fit system, significantly improving assembly reliability and efficiency.

[0024] Preferably, a camera device includes an autofocus drive motor as described above.

[0025] Protecting the camera device integrating this motor demonstrates the end-product value of the innovative structure. Optimized motor structure directly improves the reliability of the camera device: reduced glue contamination extends the lifespan of moving parts in the lens; more stable carrier movement improves continuous focusing performance; and increased assembly yield reduces overall device failure rate. These improvements are particularly significant in space-constrained devices such as mobile phones, where a thinner design allows space for components like batteries, and a longer stroke enhances long-range shooting capabilities. Improved motor performance consistency also reduces the difficulty of camera module calibration, shortening the product launch cycle. Extending the value of structural innovation to the end-product level forms a complete patent protection chain.

[0026] The advantages of this utility model compared to the prior art are: This invention creates a novel force transmission path by setting a notch structure around the central opening in the base, thereby producing positive effects in multiple dimensions: Core effect: Force path reconstruction The notch forms a physical channel in the base structure, allowing the fixture to pass through the notch from the bottom of the motor and contact the carrier. This design transforms the traditional "top-down spring pressing" force application method into "bottom-up carrier lifting," physically avoiding the possibility of contact between the fixture and the upper spring adhesive area.

[0027] Advantages of Derivative Technologies 1. Contamination Risk Control: The working end of the fixture only contacts the non-adhesive-dispensed area on the bottom of the carrier (such as the boss structure), which helps reduce the probability of adhesive adhesion. Even if there is a trace amount of adhesive residue, its location is far away from sensitive areas such as springs and magnetic gaps, reducing potential interference with the carrier's motion performance.

[0028] 2. Motion performance optimization: Preventing glue particles from entering the motion mechanism helps maintain smooth movement of the carrier within the magnetic gap space, which may improve the linearity of the focus response and the accuracy of repeatability.

[0029] 3. Improved production efficiency: The reduced frequency of fixture contamination can reduce the number of production line downtimes for cleaning, and the number of defective products caused by contamination may also decrease, which has a positive impact on the overall production pass rate.

[0030] 4. Structural compatibility advantages: The notch feature achieves functional breakthroughs without significantly weakening the load-bearing capacity of the base, maintaining the stability of the support for the outer shell components; no additional parts are required, and it is naturally compatible with existing motor components; it also leaves room for the implementation of ultra-thin designs.

[0031] This structural innovation simultaneously optimizes product reliability, production economy, and process adaptability through a change in a single physical feature. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is an exploded view of an autofocus drive motor according to an embodiment of the present invention.

[0034] Figure 2 This is a structural diagram of an automatic focusing drive motor according to an embodiment of the present invention.

[0035] Figure 3 This is a structural diagram of the autofocus drive motor from another perspective, representing an embodiment of the present invention.

[0036] Figure 4 This is a top view of an autofocus drive motor according to an embodiment of the present invention.

[0037] Labeling explanation: 1. Base, 2. Outer shell, 3. Magnet, 4. Carrier, 5. Coil, 6. Upper spring, 7. Lower spring, 11. Notch, 41. Boss. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0042] The technical solutions in this application will now be described with reference to the accompanying drawings. Example 1

[0043] This embodiment provides an autofocus drive motor, including a base 1, a housing 2, a magnet 3, a carrier 4, a coil 5, an upper spring 6, and a lower spring 7. The magnet 3 is fixed to the inner wall of the housing 2, the coil 5 is fixed to the carrier 4, and the carrier 4 is suspended inside the housing 2 by the upper spring 6 and the lower spring 7. At least one notch 11 is provided at the periphery of the central opening of the base 1.

[0044] The core innovation lies in the notch 11 structure located around the central opening of the base 1. This design allows the base 1 to maintain its overall structural strength while providing an operating channel for external fixtures. Traditional base 1s, due to the completely closed edge of the central opening, prevent fixtures from directly contacting the carrier 4 from the bottom, necessitating pressing the spring 6 downwards during assembly, which easily leads to glue contamination of the fixture. This structure, through the notch 11, breaks the complete obstruction of the carrier 4's bottom by the base 1, allowing the fixture to extend from below the base 1 and act on the carrier 4. This physical channel fundamentally changes the direction of force applied to the carrier 4, transforming the traditional "pressing down on the spring 6" assembly mode into an "upward pushing on the carrier 4" mode. Since the fixture no longer needs to contact the glued area of ​​the spring 6, it helps reduce the risk of glue contamination. Simultaneously, the notch 11 design requires minimal structural modification to the base 1 itself, does not affect its basic function of supporting the outer shell 2 and magnet 3, and requires no additional parts or complex processes. This feature provides a fundamental structural support for subsequent assembly process innovations and is a key physical prerequisite for solving the glue residue problem.

[0045] In this embodiment, the bottom of the carrier 4 is provided with a boss 41 corresponding to the position of the notch 11 on the base 1.

[0046] A boss 41 structure corresponding to the notch 11 of the base 1 is added to the bottom of the carrier 4, forming a collaborative innovation with the notch 11. The boss 41 serves as a dedicated force-bearing point on the carrier 4, its position strictly corresponding to the notch 11, ensuring that the fixture can accurately contact the boss 41 through the notch 11. Traditional carrier 4 bottoms are flat or non-directional structures; direct lifting can easily lead to uneven force distribution and tilting. The boss 41 design concentrates the fixture's force on a specific protruding part, significantly improving the stability of the lifting process. The boss 41 is slightly higher than the bottom surface of the carrier 4, preventing accidental contact between other parts of the carrier 4 and the base 1, ensuring a smooth lifting path. Furthermore, as a localized reinforcement structure, the boss 41 can withstand repeated lifting operations without easily deforming, extending the service life of the carrier 4. This feature, in conjunction with the notch 11 of the base 1, constructs a precise force transmission path of "fixture 8 - notch 11 - boss 41," making the lifting action of the carrier 4 more controllable, providing a reliable physical basis for the precise positioning of the carrier 4, and is the core guarantee for achieving interference-free contact between the carrier 4 and the spring 6.

[0047] In this embodiment, there are four notches 11 on the base 1.

[0048] The inclusion of four notches 11 in the base 1 is an optimized design element representing a core innovation. These four notches 11 are symmetrically distributed around the central opening of the base 1, forming a balanced force transmission channel. Compared to the potential tilting of the carrier 4 caused by a single notch 11, the four-notch layout allows the jig pins to simultaneously act on the four corner bosses 41 of the carrier 4, achieving a completely horizontal lifting of the carrier 4. The symmetrical distribution also disperses the stress on each pin 8, reducing the risk of deformation due to localized stress concentration. The uniform circumferential arrangement of the four notches 11 eliminates the limitation on the installation angle of the carrier 4, improving the tolerance of the assembly process. Simultaneously, this number minimizes the weakening of the structural integrity of the base 1 while ensuring lifting stability, avoiding the impact of excessive openings on the rigidity of the base 1. The four-notch design has been verified in engineering practice as an optimal solution that balances reliability and process efficiency, effectively balancing structural strength and operational convenience.

[0049] In this embodiment, the boss 41 protrudes from the bottom surface of the carrier 4.

[0050] The requirement that boss 41 protrude beyond the bottom surface of carrier 4 is a key constraint on the load-bearing structure. This protruding design makes boss 41 the highest point on the bottom of carrier 4, ensuring that the jig pins preferentially contact boss 41 rather than other areas of the bottom surface of carrier 4. This physical isolation avoids particulate contamination caused by accidental friction between the bottom surface of carrier 4 and base 1, while also reducing lifting resistance. The operating space created by the height difference of boss 41 allows for minor positioning deviations of the jig pins without affecting functionality. The protruding structure also increases the contact area of ​​the jig, dispersing local pressure and preventing indentations on the surface of carrier 4. This feature makes boss 41 a dedicated lifting interface, strictly limiting the force to a predetermined area and protecting the precision optical mounting surface of carrier 4 from mechanical damage. The optimized height of boss 41 balances lifting stroke requirements with the overall thinness requirements of the motor, a necessary condition for reliable assembly of ultra-thin motors.

[0051] In this embodiment, the notch 11 extends through the thickness direction of the base 1.

[0052] The penetrating characteristic of notch 11 is emphasized to ensure the physical feasibility of the fixture channel. Penetrating through the thickness direction allows notch 11 to form a true through-hole structure, eliminating interference with the movement of the fixture ejector pins. If notch 11 were not penetrating, residual material might block the ejector pin 8 or cause it to deviate, compromising lifting accuracy. The penetrating design allows the ejector pin 8 to act perpendicularly on the boss 41, ensuring a force transmission path without angular deviation and guaranteeing the linear ascent of the carrier 4. The through-hole structure also facilitates machining and cleaning, preventing debris accumulation from affecting motor performance. This feature is the fundamental guarantee for the functionality of notch 11, upgrading the base 1 from a simple support component into an intelligent structure with process guidance capabilities.

[0053] In this embodiment, the inner ring of the upper spring 6 is fixedly connected to the upper part of the carrier 4.

[0054] The clear connection between the inner ring of the upper spring 6 and the upper part of the carrier 4 is a fundamental feature of the motor's motion mechanism. This connection ensures the precise transmission of motion from the carrier 4 to the spring 6, guaranteeing linear control of lens focusing. The inner ring connection maximizes the utilization of the spring 6's deformation space, providing uniform suspension support. The upper connection position avoids the optical path of the carrier 4, preventing mechanical interference with imaging. The robust fixed connection ensures it won't loosen under high-frequency movement, maintaining the motor's long-term stability. This feature is the structural basis for achieving optical image stabilization and high-precision focusing.

[0055] In this embodiment, the inner ring of the lower spring 7 is fixedly connected to the lower part of the carrier 4, and the outer ring of the lower spring 7 is fixedly connected to the base 1.

[0056] The dual connection of the lower spring 7 defines a complete motion suspension system. The inner ring connects to the lower part of the carrier 4, providing basic support, while the outer ring connects to the base 1, forming a fixed reference frame. This layout maintains tension balance between the upper and lower springs 6 and 7, resulting in a more stable motion trajectory. The lower connection point and the upper connection point create symmetrical force distribution, reducing the risk of tilting of the carrier 4. The fixed base 1 ensures precise alignment between the spring system and the motor housing 2, providing a stable working environment for magnetic field drive. This feature is crucial for achieving long-stroke focusing, ensuring that the carrier 4 maintains posture stability during long-distance movement.

[0057] In this embodiment, the outer shell 2 is fixedly connected to the base 1.

[0058] The fixed connection between the outer shell 2 and the base 1 forms the core framework of the motor. This connection integrates the magnet 3 fixing assembly and the carrier 4 suspension system into a unified whole, ensuring that the magnetic gap accuracy is not affected by assembly errors. A robust connection suppresses operational vibration and reduces noise generation. The base 1 serves as a mounting reference surface, accurately positioning the outer shell 2 and ensuring optimal coupling efficiency between the magnetic circuit and the coil 5. This feature is the structural basis for maintaining the motor's mechanical precision and electromagnetic performance, directly affecting focusing speed and accuracy.

[0059] In this embodiment, the shape of the boss 41 is adapted to the shape of the notch 11, so that the fixture can contact and lift the boss 41 through the notch 11.

[0060] Specifying the shape compatibility between boss 41 and notch 11 is a key design feature for improving assembly accuracy. Shape compatibility includes geometric contour matching and dimensional tolerance fit, ensuring that the jig pins pass unobstructed through notch 11 and fully contact the working surface of boss 41. The compatibility design eliminates lateral displacement during the lifting process, ensuring the carrier 4 moves strictly vertically. This precision fit reduces the number of adjustments needed, increasing production line cycle time. Specific shape combinations also serve as a mistake-proofing design, preventing reverse installation of components. This feature upgrades notch 11 and boss 41 from independent structures into a precision-fitted system, significantly improving assembly reliability and efficiency. Example 2

[0061] This embodiment provides another implementation of an autofocus drive motor. Its basic structure is similar to that of Embodiment 1, also including a base 1, a housing 2, a magnet 3, a carrier 4, a coil 5, an upper spring 6, and a lower spring 7. The magnet 3 is fixed to the inner wall of the housing 2, the coil 5 is fixed to the carrier 4, and the carrier 4 is suspended inside the housing 2 by the upper spring 6 and the lower spring 7. The key feature is that at least one notch 11 is provided around the central opening of the base 1.

[0062] In this embodiment, the bottom of the carrier 4 does not have the dedicated boss structure described in Embodiment 1. However, thanks to the notch 11 provided on the base 1, during assembly, the external fixture can still directly contact the bottom surface of the carrier 4 through the physical channel formed by the notch 11 from the bottom of the motor. The fixture pin can apply upward force through the notch 11, acting on the corresponding area of ​​the bottom of the carrier 4, thereby lifting the carrier 4 upward and making it fit tightly against the upper spring 6 for adhesive fixing.

[0063] The key advantage of this structural design is that it avoids the need for the fixture to directly press the inner ring of the upper spring 6 from above, as is required in traditional assembly processes. Because the fixture contacts the carrier 4 itself from the bottom via the notch 11, rather than the upper spring 6 in the glued area, the risk of glue contamination of the fixture's working surface is reduced. Even without a specially designed boss at the bottom of the carrier 4, the operating channel provided by the notch 11 is sufficient to change the force path, transforming the "downward pressing spring" into an "upward pushing carrier," thereby reducing the potential for glue contamination of internal moving parts of the motor, such as the upper spring 6, lower spring 7, magnetic gap space, and carrier movement track. This improves the long-term motion stability and assembly yield of the product. The design change to the notch 11 is minor, maintaining the main structural strength and support function of the base 1. Example 3

[0064] This embodiment provides an implementation scheme for the notch shape of an autofocus drive motor. Based on embodiment 1 or 2, the notch 11 formed at the periphery of the central opening of the base 1 can have various geometric configurations, and specific implementations include, but are not limited to, the following forms: Rectangular notch: The cross-section of notch 11 is rectangular, and its sidewalls are perpendicular to the upper surface of base 1. This shape facilitates stamping and provides a straight guide surface for the jig ejector pin, reducing lateral displacement during the lifting process.

[0065] Semicircular notch: The cross-section of notch 11 is a semicircular outline. The arc transition can disperse the stress concentration at the edge of the opening of base 1 and reduce the risk of structural cracking.

[0066] Trapezoidal notch: The cross-section of notch 11 is trapezoidal, and its opening width is greater than its bottom width. This tapered design ensures the passage of the jig pins while reducing noise generated by airflow disturbance during the movement of the carrier 4.

[0067] Technical effect description: Rectangular notches are suitable for space-constrained motors, maximizing the fixture's operating channel within a limited area; The semi-circular notch reduces debris accumulation by smoothing the contour, thus improving the structural durability of base 1; The trapezoidal notch guide slope helps the jig pins to automatically align, reducing the accuracy requirements for assembly positioning.

[0068] All notch configurations maintain the characteristic of penetrating the thickness direction of the base 1, ensuring the realization of the fixture channel function, and forming a shape adaptation relationship with the boss 41 (if present) at the bottom of the carrier 4. Example 4

[0069] This embodiment relates to a camera device, the core component of which includes the autofocus drive motor with a base notch structure as described in Embodiment 1, Embodiment 2 or Embodiment 3 above.

[0070] This camera device inherits the structural advantages of the aforementioned autofocus drive motor. Because the motor employs a process of lifting the carrier through a notch in the base during assembly, the risk of glue contamination from contact between the fixture and the spring-loaded adhesive area is effectively reduced. This improvement helps maintain the smooth movement of the carrier within the magnetic gap space, reducing potential problems such as increased motion resistance or trajectory deviation caused by contaminants.

[0071] Therefore, camera devices incorporating this improved motor may exhibit superior performance in terms of imaging stability, focusing accuracy reliability, and overall lifespan. The improved motor assembly yield also helps reduce the overall failure rate of the camera device. This structural optimization is particularly beneficial for camera devices with compact design requirements and high demands for component reliability and slimness, such as mobile phone camera modules.

[0072] 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. An autofocus drive motor, comprising a base (1), a housing (2), a magnet (3), a carrier (4), a coil (5), an upper spring (6), and a lower spring (7), wherein the magnet (3) is fixed to the inner wall of the housing (2), the coil (5) is fixed to the carrier (4), and the carrier (4) is suspended inside the housing (2) by the upper spring (6) and the lower spring (7), characterized in that, At least one notch (11) is provided around the central opening of the base (1).

2. The autofocus drive motor according to claim 1, characterized in that, The bottom of the carrier (4) is provided with a boss (41) corresponding to the position of the notch (11) on the base (1).

3. The autofocus drive motor according to claim 1 or 2, characterized in that, The number of notches (11) on the base (1) is four.

4. The autofocus drive motor according to claim 2, characterized in that, The boss (41) protrudes from the bottom surface of the carrier (4).

5. The autofocus drive motor according to claim 3, characterized in that, The notch (11) extends through the thickness direction of the base (1).

6. The autofocus drive motor according to claim 1, characterized in that, The inner ring of the upper spring (6) is fixedly connected to the upper part of the carrier (4).

7. The autofocus drive motor according to claim 1, characterized in that, The inner ring of the lower spring (7) is fixedly connected to the lower part of the carrier (4), and the outer ring of the lower spring (7) is fixedly connected to the base (1).

8. The autofocus drive motor according to claim 1, characterized in that, The outer shell (2) is fixedly connected to the base (1).

9. The autofocus drive motor according to claim 2, characterized in that, The shape of the boss (41) is adapted to the shape of the notch (11) so that the fixture can contact and lift the boss (41) through the notch (11).

10. A camera device, characterized in that, It includes an autofocus drive motor as described in any one of claims 1-9.

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