A VCM motor housing assembly, a VCM motor, a camera and an electronic device

Abstract

The utility model relates to a kind of VCM motor shell assembly, VCM motor, camera and electronic equipment, VCM motor shell assembly includes shell, magnet and the elastic sheet fixed in the top of shell, the frame of the elastic sheet is equipped with at least one limiting structure, the limiting structure is the limiting gap or limiting protrusion formed on frame, after the magnet is installed in position, its edge projection on the top surface of shell coincides or intersects with the contour boundary of the limiting structure.The utility model provides a kind of VCM motor shell assembly, VCM motor, camera and electronic equipment, limiting structure is set in elastic sheet frame, it can be gap or protrusion, its contour forms clear reference line in optical detection.When magnet is installed in position, by judging the coincidence / intersection relationship of magnet edge projection and gap contour, instead of directly identifying the edge of reflecting shell, anti-interference positioning is realized.

Description

Technical Field

[0001] This utility model relates to the field of camera motor technology, specifically a VCM motor housing assembly and related products for optimizing magnet installation detection. Background Technology

[0002] In existing VCM motor manufacturing processes, after the magnet is installed in a housing made of a magnetically conductive material (usually metal), visual inspection equipment (such as a CCD camera) is needed to scan multiple positioning points of the magnet and the housing to determine the accuracy of the magnet's installation position. This inspection method has the following significant drawbacks:

[0003] Low testing efficiency: It requires collecting and analyzing data points from multiple locations, resulting in excessively long testing times for a single product.

[0004] Limited positioning accuracy: The reflective properties of the metal casing make it difficult for the vision system to clearly and stably identify the actual position of the casing edge, which greatly interferes with the accurate positioning of the magnet edge, resulting in decreased detection accuracy and increased missed detection rate due to installation deviation.

[0005] High equipment and maintenance costs: In order to cope with complex multi-location point identification, anti-reflective interference and processing of cumulative errors, the system usually needs to be equipped with high computing power hardware and rely on complex identification algorithms, which significantly increases the equipment procurement and maintenance costs.

[0006] Although industry attempts have tried to improve the reflection problem by optimizing image processing algorithms or adding auxiliary light source compensation, these measures have not addressed the fundamental structural contradictions and have failed to completely solve the core bottleneck of inaccurate identification of magnet edges caused by shell reflection. Therefore, an innovative solution from the structural design level is urgently needed to overcome the bottlenecks in efficiency, accuracy, and cost of existing magnet installation position detection methods. Utility Model Content

[0007] In view of this, the present invention provides a VCM motor housing assembly, a VCM motor, a camera, and an electronic device. A limiting structure, which can be a notch or a protrusion, is set on the edge of the spring sheet, and its outline forms a clear baseline in optical detection. When the magnet is installed in place, anti-interference positioning is achieved by judging the coincidence / intersection relationship between the projection of the magnet edge and the notch outline, rather than directly identifying the edge of the reflective housing.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A VCM motor housing assembly includes a housing, a magnet, and a spring plate fixed to the top of the housing. The edge of the spring plate is provided with at least one limiting structure, which is a limiting notch or limiting protrusion formed on the edge. After the magnet is installed in place, the projection of its edge on the top surface of the housing coincides with or intersects with the contour boundary of the limiting structure.

[0010] By confining the projected position of the magnet's edge within the boundary of the limiting structure (for notches) or establishing a relationship with the boundary of the limiting structure (for protrusions), an intuitive physical positioning benchmark is constructed. This allows the vision inspection system to determine the magnet's installation status simply by identifying and comparing the positional relationship between the actual edge projection of the magnet and the boundary of the limiting structure within this single area from the top of the housing (when they coincide, the position is accurate; when they intersect, there is an acceptable offset; and when they are close, it indicates that the magnet is at the edge of the tolerance zone). This completely replaces the traditional multi-position scanning logic. This structure cleverly simplifies the inspection target from the complex positional relationship between the magnet and the housing to the verification of the inclusiveness of the notch contour to the magnet's edge projection. By using the clear contour of the limiting structure instead of the reflective metal housing edge as the positioning benchmark, visual recognition errors are eliminated. At the same time, the number of inspection points is drastically reduced, significantly lowering the equipment's computational load, shortening the inspection time for a single piece, and avoiding the cumulative error risk of multi-dimensional calibration. This design greatly reduces the difficulty of magnet installation and the reliance on high-precision equipment, allowing for rapid positioning and real-time / final quality inspection through relatively simple top vision (such as visual or machine vision). It effectively prevents motor performance degradation (such as uneven magnetic field, insufficient driving force, or deterioration of linearity) caused by installation deviations, and directly improves production efficiency and product yield.

[0011] Preferably, the contour of the limiting structure includes at least one boundary line that is perpendicular or not perpendicular to the side of the housing.

[0012] By defining the directionality of the boundary lines of the limiting structure, more flexible and targeted limiting designs are provided. Boundary lines perpendicular to the side of the housing (such as straight lines) can precisely constrain and detect the displacement of the magnet edge in a direction parallel to that side, which is particularly suitable for applications requiring strict control of the magnet's position in a specific axial direction. Boundary lines not perpendicular to the side of the housing (such as oblique lines or lines at specific angles) provide more complex limiting strategies, which can simultaneously constrain the displacement of the magnet edge in multiple directions or detect offsets at specific angles. This directional design allows the limiting structure to better adapt to the positioning requirements of magnets of different shapes (such as non-rectangular ones), or to situations in motor designs where the magnet needs to be installed at a specific angle to optimize the magnetic field distribution. By selecting boundary lines with different directions, the limited space of the spring clip frame can be utilized more effectively to design limiting features that best meet the positioning accuracy requirements of specific magnets, improving the adaptability and optimization potential of the design.

[0013] Preferably, the boundary line is a straight line or an arc.

[0014] The morphology of the limiting structure boundary line is further specified, providing two effective implementation methods. Straight boundary lines offer advantages such as simple manufacturing and convenient inspection. In visual positioning or inspection, straight edges are clear and easily identifiable, making it easy to identify and measure their distance or overlap with the magnet's edge projection. Calculations are simple, and the requirements for inspection equipment are relatively low. Curved boundary lines provide better matching with magnets having curved edges. When the magnet's edge is curved, using a corresponding curved boundary line can more accurately define the magnet's position and angle, reducing positioning errors or misjudgments caused by shape mismatch. The curved design allows for a more natural and fitting constraint of magnets with specific curved contours, optimizing the constraint effect in contact or adjacent areas. The choice between these two forms depends on the actual edge shape of the magnet and the required limiting characteristics, providing designers with greater flexibility to achieve the best balance between processing convenience, inspection efficiency, and positioning accuracy, meeting diverse product design requirements.

[0015] Preferably, the limiting structure is distributed at the corner of the spring sheet frame, and the limiting structure is provided on both adjacent sides of the corner.

[0016] The optimal location for the limiting structure is defined as the corner of the spring frame, with additional structures on both adjacent sides. The corner is a relatively robust and space-efficient location within the spring structure. Placing the limiting structure at the corner, covering both adjacent sides, allows for precise constraint and position detection of a corner region of the magnet in two mutually perpendicular directions (typically corresponding to the X and Y axes of the motor). This layout maximizes the use of corner space, avoiding excessive weakening of local strength that might result from notches in the middle of the straight edge of the frame. Simultaneously, by constraining the corner points of the magnet, the overall translational and rotational degrees of freedom of the magnet can be controlled most effectively, as changes in the corner point's position comprehensively reflect the overall position and angular deviation of the magnet. During inspection, only the projection of a point in the corner region and its relationship with the two limiting structures need to be considered to quickly determine whether the magnet's position and angle in the plane are acceptable, simplifying the inspection process and improving efficiency and reliability. This layout is particularly efficient and accurate for positioning rectangular or near-rectangular magnets.

[0017] Preferably, it also includes a reference notch, which is used for installation positioning. Its projection on the top surface of the housing does not overlap with the projection of the magnet edge, and the distance between the projection outline of the magnet edge on the top surface of the housing and the outline of the reference notch is greater than the width of the limiting structure.

[0018] An additional reference notch is introduced, explicitly designed for installation positioning and defining its spatial relationship with the magnet projection. The reference notch provides a clear and distinct positioning reference point or area, independent of the locating structure. During installation, the operator or equipment can initially use the reference notch for preliminary, approximate positioning, such as moving the magnet towards the approximate area indicated by the notch. A key feature is that after the magnet is in place, its edge projection must not overlap with the reference notch outline and must have a gap greater than the width of the locating structure. This ensures that the reference notch is not obscured by the magnet, remains clearly visible, and serves as a permanent positional reference mark. The larger gap requirement clearly distinguishes the functions of the reference notch and the locating structure: the reference notch is used for coarse positioning and orientation identification, while the locating structure is used for fine positioning and tolerance verification. This design avoids visual confusion and improves the intuitiveness and logic of positioning operations. The presence of the reference notch is particularly beneficial for machine vision positioning algorithms in automated assembly, providing additional feature points for calibration or auxiliary positioning, enhancing the system's robustness and fault tolerance.

[0019] Preferably, the limiting structure extends from the outer edge of the spring frame to the inner edge, or from the inner edge of the spring frame to the outer edge.

[0020] Two possible extension methods for the limiting structure in the thickness direction of the spring frame are defined. These two methods offer different design options to adapt to different spring structures, manufacturing processes, or inspection requirements. One method involves a notch extending from the outer edge to the inner edge, with its opening located at the outer edge of the spring. This design may be easier to process during spring stamping, and the outer opening of the notch may be easier to observe during visual inspection, especially when the viewing angle at the edge of the housing assembly is limited. The other method involves a notch extending from the inner edge to the outer edge, with its opening located at the inner edge of the spring. This design may be more advantageous during magnet installation, allowing observation of the relationship between the magnet edge and the notch boundary from the inner space of the spring (typically the area where moving parts such as coils are located), or when specific avoidance is required on the inner side of the spring. Both extension methods effectively form geometric features (notches) on the frame for positioning and inspection, while their core function (providing a projected boundary for comparing magnet positions) remains unchanged. Designers can choose the most suitable notch extension direction based on the specific product structure layout, assembly process, and inspection methods to achieve optimal manufacturability, assemblability, and inspectability.

[0021] Preferably, the inner peripheral wall of the housing is provided with a boss, the bottom surface of the spring sheet abuts against the top surface of the boss, and the top surface of the boss is lower than the top surface of the limiting structure, forming a height difference between the two.

[0022] An internal boss structure and its spatial relationship with the spring and limiting structure were introduced. The boss provides a precise and reliable mounting reference surface (top surface) for the spring, ensuring that the spring is positioned at a predetermined height inside the housing. This is crucial for ensuring sufficient space for the magnetic gap and moving parts within the motor. The bottom surface of the spring rests against the top surface of the boss, forming a stable support, enhancing the overall rigidity and stability of the assembly, reducing deformation of the spring due to force or vibration, and indirectly ensuring the positional accuracy of the magnet fixed to the spring. A key feature is that the top surface of the boss is lower than the top surface of the limiting structure, creating a height difference. This design ensures that when observing from above, the limiting structure area (part of the spring frame) is the most "prominent" or "visible" part of the spring in the projection direction, and is not obstructed by the boss or other structures. Light or lines of sight can be projected unobstructed onto the contour boundary of the limiting structure, making the comparison between the magnet edge projection and the notch contour boundary clear, accurate, and undisturbed. This height difference is a key structural guarantee for the effective implementation of the aforementioned core projection positioning detection method. It avoids the problem of visual detection failure or accuracy reduction due to component obstruction, and improves the reliability and accuracy of detection.

[0023] A VCM motor comprising the VCM motor housing assembly as described above.

[0024] Due to the aforementioned advantages of this housing assembly (such as precise magnet positioning, convenient and efficient installation and testing, robust and reliable structure, and strong adaptability), the overall performance of the VCM motor using this housing assembly is significantly improved. Precise magnet positioning is the foundation for the VCM motor to generate uniform, stable, powerful, and highly linear driving force, directly affecting the accuracy, speed, and stability of focusing or optical image stabilization (OIS). Convenient and efficient installation and testing reduce the motor's manufacturing cost, improving production efficiency and yield. The structural robustness of the housing assembly ensures the motor's reliability under long-term use or harsh environments (such as vibration and temperature changes). Design flexibility (such as notch direction, shape, and position selection) allows the motor to better adapt to the design requirements of different optical modules. Therefore, this VCM motor can provide superior autofocus or optical image stabilization performance, with higher production efficiency and reliability, meeting the growing demand for high-precision, miniaturized, and low-cost camera modules.

[0025] A camera that includes a VCM motor as described above.

[0026] As a core driving component of the camera (typically used for autofocus (AF) in lens assemblies, and possibly for optical image stabilization (OIS), the VCM motor's performance directly determines the camera's focusing speed, accuracy, quietness, stability, and reliability. Employing a VCM motor with high-precision magnetic positioning, high structural stability, and high production yield means the camera can achieve faster, more accurate, and quieter focusing, quickly locking onto the target and reducing blur when shooting still images or videos. If the motor is used in OIS, it provides more effective image stabilization, improving image sharpness, especially in low-light or telephoto scenarios. The motor's high reliability and stability ensure the camera's durability during long-term use in mobile devices such as smartphones, reducing malfunctions. Simultaneously, the efficient manufacturing process helps reduce the overall cost of the camera module. Therefore, cameras incorporating this VCM motor offer superior imaging performance (fast and accurate focusing, effective image stabilization), high reliability, and a more competitive cost advantage, making them suitable for various applications such as smartphones, digital cameras, security monitoring, and automotive imaging.

[0027] An electronic device comprising a camera as described above.

[0028] An electronic device integrating the aforementioned high-performance camera (typically a smartphone, but also includes tablets, laptops, drones, smart cars, security equipment, AR / VR devices, etc.) is described. The camera is one of the core functional modules of modern electronic devices, especially mobile smart devices, directly impacting user experience (such as taking photos, video calls, facial recognition, QR code scanning, AR applications, etc.). Electronic devices equipped with cameras featuring fast, accurate, and stable autofocus and / or optical image stabilization can provide users with a significantly superior imaging experience: clearer and sharper photos, smoother and more stable videos, significantly improved image quality in low-light environments, and faster and more accurate facial unlocking or QR code scanning. The high reliability of the camera also enhances the overall durability and user satisfaction of the electronic device. Furthermore, the design and manufacturing advantages of the VCM motor and its housing components upon which the camera relies help control the cost and supply chain stability of key components (camera modules) in electronic devices, which is strategically significant for electronic device manufacturers to maintain product performance and cost advantages in fierce market competition. Therefore, this electronic device is more attractive in the market due to its superior imaging capabilities and potential cost-effectiveness.

[0029] The advantages of this utility model compared to the prior art are:

[0030] Significantly improved detection efficiency: By simplifying the magnetic positioning detection to determining the positional relationship (coincidence, intersection, or separation) between the magnetic edge projection and the boundary of the limiting structure, the number of required detection points is greatly reduced, shortening the detection time for a single piece.

[0031] Significantly enhanced anti-interference performance: Using the clear, stable, and easily identifiable contour of the upper limit structure of the spring sheet as the optical positioning reference, the problem of blurred shell edge recognition failure caused by reflection on the surface of the magnetic shell is effectively avoided, thus improving the reliability of detection.

[0032] Positioning accuracy is intuitively apparent: The non-vertical (tilted or curved) boundary line design amplifies the positional deviation of the magnet (including translation and rotation angles), making minute offsets easier to detect in visual comparison and reducing reliance on high-precision sensors and complex algorithms.

[0033] Manufacturing costs are effectively reduced: thanks to the simplified single-area positioning and determination logic, the complex multi-axis scanning positioning mechanism and the corresponding high-cost image processing equipment in traditional solutions can be eliminated or simplified, thereby reducing the overall cost of manufacturing equipment and systems.

[0034] Material selection notes: When the shell is made of a magnetically conductive material (such as iron alloy), the positioning accuracy of the magnet can be optimized simultaneously with the uniformity of the magnetic field; when the shell is made of a non-magnetically conductive material (such as stainless steel or plastic), this design can still solve the positioning detection problem caused by edge reflection, but the magnetic field performance needs to be guaranteed by the design of the magnet itself. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a structural diagram of a VCM motor housing assembly according to an embodiment of the present invention.

[0037] Figure 2 This is a front view of a VCM motor housing assembly according to an embodiment of the present invention.

[0038] Labeling: 1. Shell 11. Boss 2. Magnet edge 21. Spring 3. Spring edge 31. Limiting structure of edge 311. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0043] The technical solutions in this application will now be described with reference to the accompanying drawings. Example 1

[0044] This embodiment discloses a VCM motor housing 1 assembly, including a housing 1, a magnet 2, and a spring piece 3 fixed to the top of the housing 1. The frame 31 of the spring piece 3 is provided with at least one limiting structure 311. In this embodiment, the limiting structure 311 is a limiting notch formed on the frame. After the magnet 2 is installed in place, the projection of its edge 21 on the top surface of the housing 1 coincides with or intersects with the outline boundary of the limiting structure 311.

[0045] By confining the projection position of the edge 21 of magnet 2 within the contour boundary of the limiting structure 311, an intuitive physical positioning reference is constructed. This allows the vision inspection system to determine the installation status of magnet 2 simply by identifying and comparing the positional relationship between the actual projection of the edge 21 of magnet 2 and the contour boundary of the limiting structure 311 within this single area from the top of the housing 1. Specifically, when the two coincide, the position is accurate; when they intersect, an acceptable offset exists; and when they are close, the position is at the edge of the tolerance zone, thus completely replacing the traditional multi-position scanning logic. This structure cleverly simplifies the detection target from the complex positional relationship between magnet 2 and housing 1 to the verification of the inclusiveness of the notch contour to the projection of the edge 21 of magnet 2. If housing 1 is made of metal, its surface is prone to reflection, making edge recognition difficult. By using the clear contour of the limiting structure 311 as an optical positioning reference, the vision system can accurately determine the relative position of the edge 21 of magnet 2 and the notch boundary. At the same time, due to the sharp reduction in the number of detection points, the computational load of the equipment is significantly reduced, the time for single-piece inspection is shortened, and the risk of cumulative errors in multi-size calibration is avoided. This design greatly reduces the difficulty of installing the magnet 2 and the dependence on high-precision equipment, allowing for rapid positioning and real-time / final quality inspection through relatively simple top vision, such as visual inspection or machine vision. It effectively prevents motor performance degradation caused by installation deviations, common problems such as uneven magnetic field, insufficient driving force or deterioration of linearity, and directly improves production efficiency and product yield.

[0046] In this embodiment, the outline of the limiting structure 311 includes a boundary line perpendicular to the side of the housing 1. The boundary line is a straight line.

[0047] The boundary line perpendicular to the side of the housing 1, a straight line, can accurately constrain and detect the displacement of the edge 21 of the magnet 2 in the direction parallel to that side, and is particularly suitable for applications that require strict control of the position of the magnet 2 in a certain axial direction.

[0048] In this embodiment, the limiting structure 311 is distributed at the corner of the edge 31 of the spring piece 3, and the limiting structure 311 is provided on both adjacent sides of the corner.

[0049] The preferred position of the limiting structure 311 is defined at the corner of the frame 31 of the spring piece 3, and it is also set on both adjacent sides. The corner is a relatively robust and space-efficient location in the spring piece 3 structure. By placing the limiting structure 311 at the corner and covering the adjacent sides, it is possible to simultaneously and precisely constrain and detect the position of a corner area of ​​the magnet 2 in two mutually perpendicular directions, typically corresponding to the X and Y axes of the motor. This layout maximizes the use of corner space and avoids excessive weakening of local strength that might be caused by opening a notch in the middle of the straight edge of the frame 31. At the same time, by constraining the corner point of the magnet 2, the translational and rotational degrees of freedom of the magnet 2 can be controlled most effectively, because the positional changes of the corner point can comprehensively reflect the overall position and angular deviation of the magnet 2. During inspection, only the projection of a point in the corner area and its relationship with the two limiting structures 311 need to be considered to quickly determine whether the position and angle of the magnet 2 in the plane are qualified, simplifying the inspection process and improving inspection efficiency and reliability. This layout is particularly efficient and accurate for the positioning of rectangular or quasi-rectangular magnets 2.

[0050] In this embodiment, the limiting structure 311 extends from the inner edge of the spring sheet 3 frame 31 to the outer edge.

[0051] The notch extends from the inner edge to the outer edge, with its opening located at the inner edge of the spring piece 3. This design may be more advantageous during the installation of the magnet 2, allowing observation of the relationship between the edge 21 of the magnet 2 and the notch boundary from the inner space of the spring piece 3, which is typically the area where moving parts such as coils are located, or when specific avoidance is required inside the spring piece 3.

[0052] In this embodiment, the inner peripheral wall of the housing 1 is provided with a boss 11, the bottom surface of the spring piece 3 is attached to the top surface of the boss 11, and the top surface of the boss 11 is lower than the top surface of the limiting structure 311, forming a height difference between the two.

[0053] A boss 11 structure is introduced within the housing 1, along with its spatial relationship to the spring 3 and the limiting structure 311. The boss 11 provides a precise and reliable mounting reference surface, i.e., the top surface, for the spring 3, ensuring that the spring 3 is positioned at a predetermined height within the housing 1. This is crucial for ensuring sufficient space for the magnetic gap and moving parts within the motor. The bottom surface of the spring 3 abuts against the top surface of the boss 11, forming a stable support, enhancing the overall rigidity and stability of the assembly, reducing deformation of the spring 3 due to force or vibration, and indirectly ensuring the positional accuracy of the magnet 2 fixed to the spring 3. A key feature is that the top surface of the boss 11 is lower than the top surface of the limiting structure 311, creating a height difference. This design ensures that when observing from above, the area of ​​the limiting structure 311, which belongs to the edge 31 of the spring 3, is the most prominent or visible part of the spring 3 in the projection direction and is not obstructed by the boss 11 or other structures. Light or lines of sight can be projected unobstructed onto the contour boundary of the limiting structure 311, making the comparison between the projection of the magnet 2 edge 21 and the notch contour boundary clear, accurate, and undisturbed. This height difference is a key structural guarantee for the effective implementation of the aforementioned core projection positioning detection method. It avoids the problem of visual detection failure or accuracy reduction due to component obstruction, and improves the reliability and accuracy of detection.

[0054] As another implementation of the limiting structure, the limiting structure 311 can also be a limiting protrusion formed on the frame 31 of the spring piece 3. The limiting protrusion also has a clear outline boundary. After the magnet 2 is installed in place, the projection of its edge 21 on the top surface of the housing 1 must coincide with or intersect the outline boundary of the limiting protrusion. The outline of the limiting protrusion can also include straight lines and arcs, and can be distributed at corners. Its detection principle is similar to that of the limiting notch, both using the clear and stable outline of the protrusion itself as an optical positioning reference to replace the easily reflective edge of the housing for projection position comparison, thereby achieving anti-interference accurate positioning and efficient detection. The height difference design where the top surface of the boss 11 is lower than the top surface of the limiting protrusion is also applicable to ensure that the outline of the limiting protrusion is clearly visible in the projection direction. Example 2

[0055] As an alternative to Embodiment 1, the inner peripheral wall of the housing 1 in this embodiment does not have a boss, and the bottom surface of the spring piece 3 is directly attached to the inner peripheral wall of the housing 1. Example 3

[0056] In this embodiment, a reference notch is also included. The reference notch is used for installation positioning. Its projection on the top surface of the housing 1 does not overlap with the projection of the edge 21 of the magnet 2. The distance between the projection outline of the edge 21 of the magnet 2 on the top surface of the housing 1 and the outline of the reference notch is greater than the width of the limiting structure 311.

[0057] An additional reference notch is introduced, its function explicitly defined for installation positioning, and it defines its spatial relationship with the projection of magnet 2. The reference notch provides a clear and distinct positioning reference point or area, independent of the limiting structure 311. During installation, the operator or equipment can first use the reference notch for preliminary, approximate positioning, such as moving magnet 2 towards the approximate area indicated by the reference notch. A key feature is that after magnet 2 is installed, the projection of its edge 21 must not overlap with the outline of the reference notch and must have a gap greater than the width of the limiting structure 311. This ensures that the reference notch is not obscured by magnet 2, remains clearly visible, and serves as a permanent positional reference mark. The larger gap requirement clearly distinguishes the functions of the reference notch and the limiting structure 311, where the reference notch is used for coarse positioning and orientation identification, while the limiting structure 311 is used for fine positioning and tolerance verification. This design avoids visual confusion and improves the intuitiveness and logic of positioning operations. The presence of the reference notch is particularly beneficial to machine vision positioning algorithms in automated assembly, providing additional feature points for calibration or auxiliary positioning, enhancing the robustness and fault tolerance of the system. Example 4

[0058] In this embodiment, the contour of the limiting structure 311 includes at least one boundary line that is not perpendicular to the side of the housing 1, and the boundary line can be a straight line or an arc.

[0059] Boundary lines that are not perpendicular to the side of the housing 1, such as oblique lines or lines at a specific angle, provide a more complex limiting strategy. They can simultaneously constrain the displacement of the edge 21 of the magnet 2 in multiple directions or detect offsets at specific angles. This directional design allows the limiting structure 311 to better adapt to magnets 2 of different shapes, such as non-rectangular positioning requirements, or for situations in motor designs where the magnet 2 needs to be installed at a specific angle to optimize the magnetic field distribution.

[0060] The morphology of the boundary line of the limiting structure 311 is further specified, providing two effective implementation methods. A straight boundary line offers advantages such as simple manufacturing and convenient inspection. In visual positioning or inspection, a straight edge is clear and easily identifiable, making it easy to identify and measure its distance or overlap with the projection of the magnet 2 edge 21. Calculation is simple, and the requirements for inspection equipment are relatively low. An arc-shaped boundary line provides a better match with the curved edge 21 of the magnet 2. When the edge 21 of the magnet 2 is arc-shaped, using a corresponding arc-shaped boundary line can more accurately define the position and angle of the magnet 2, reducing positioning errors or misjudgments caused by shape mismatch. The arc design allows for a more natural and fitting constraint of the magnet 2 with a specific curved profile, optimizing the constraint effect in contact or adjacent areas. The choice between these two forms depends on the actual shape of the magnet 2 edge 21 and the required limiting characteristics, providing designers with greater flexibility to achieve the best balance between processing convenience, inspection efficiency, and positioning accuracy, meeting diverse product design requirements. Example 5

[0061] In this embodiment, the limiting structure 311 extends from the outer edge of the spring piece 3 frame 31 to the inner edge.

[0062] The notch extends from the outer edge to the inner edge, with its opening located at the outer edge of the spring piece 3. This design may facilitate machining during the stamping of the spring piece 3, and the outer opening of the notch may be easier to observe during visual inspection, especially when the viewing angle at the edge of the housing 1 assembly is limited.

[0063] 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 VCM motor housing assembly, characterized in that, The device includes a housing (1), a magnet (2), and a spring piece (3) fixed to the top of the housing. The frame (31) of the spring piece (3) is provided with at least one limiting structure (311). The limiting structure is a limiting notch or a limiting protrusion formed on the frame. After the magnet (2) is installed in place, the projection of its edge (21) on the top surface of the housing (1) coincides with or intersects with the outline boundary of the limiting structure (311).

2. The VCM motor housing assembly according to claim 1, characterized in that, The outline of the limiting structure (311) includes at least one boundary line that is perpendicular or not perpendicular to the side of the housing.

3. The VCM motor housing assembly according to claim 2, characterized in that, The boundary line can be a straight line or an arc.

4. The VCM motor housing assembly according to claim 1, characterized in that, The limiting structure (311) is distributed at the corner of the spring sheet frame (31), and the adjacent two sides at the corner are provided with limiting structures.

5. The VCM motor housing assembly according to claim 1, characterized in that, It also includes a reference notch, which is used for installation positioning. Its projection on the top surface of the housing (1) does not overlap with the projection of the edge of the magnet (2), and the distance between the projection outline of the edge of the magnet (2) on the top surface of the housing (1) and the outline of the reference notch is greater than the width of the limiting structure (311).

6. The VCM motor housing assembly according to claim 1, characterized in that, The limiting structure (311) extends from the outer edge of the spring frame (31) to the inner edge, or from the inner edge of the spring frame (31) to the outer edge.

7. The VCM motor housing assembly according to claim 1, characterized in that, The inner peripheral wall of the housing (1) is provided with a boss (11), the bottom surface of the spring piece (3) is attached to the top surface of the boss (11), and the top surface of the boss (11) is lower than the top surface of the limiting structure (311), forming a height difference between the two.

8. A VCM motor, characterized in that, It includes the VCM motor housing assembly as described in any one of claims 1-7.

9. A camera, characterized in that, It includes the VCM motor as described in claim 8.

10. An electronic device, characterized in that, Includes the camera as described in claim 9.

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