Camera module motor manufacturing method and motor device

Abstract

The application relates to a camera module motor manufacturing method and a motor device. The camera module motor manufacturing method comprises the following steps: inserting a magnet into each limiting piece of a material belt respectively, wherein the material belt comprises auxiliary material and a plurality of limiting pieces connected to the auxiliary material, and the limiting pieces are in a vertical state relative to the auxiliary material; through injection molding, injection molding material is formed around the limiting pieces and the magnets to form a plurality of motor devices; and the material belt is cut to separate the limiting pieces from the auxiliary material to obtain independent motor devices. The method uses the limiting pieces of the material belt to wrap and position the magnets, then performs pull belt injection molding, directly integrates the magnets in the motor device, can control the positioning precision error of the magnets within a range of + / -0.02mm, controls the thrust fluctuation within a range of + / -3%, and makes the focusing or anti-shake of the camera module faster and more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor of camera module, in particular to a camera module motor manufacturing method and motor device. BACKGROUND

[0002] In the motor of camera module, the magnet as a key component, its positioning accuracy directly affects the thrust performance, power consumption efficiency and overall reliability of the motor. In the traditional motor manufacturing method, the magnet is usually assembled into the motor component (such as carrier or stator) separately, which is easy to cause the problem of magnet position deviation.

[0003] According to the voice coil thrust relationship formula, F=B·I·L·sinθ, wherein B is the air gap flux, I is the current flowing in the coil, L is the effective length of the coil in the magnetic field, and θ is the effective angle of the coil cutting the magnetic field. When the magnet is once deflected by 0.1mm, the effective angle θ may have a difference of 3° to 5° at both ends of the stroke, resulting in the "tilt" or "tail drop" of the thrust curve. The working air gap between the magnet and the coil is usually controlled within a certain range, such as 0.10mm to 0.15mm. When the magnet positioning error is too large, the driving force decreases, resulting in insufficient thrust at the end of the camera module focusing or anti-shake stroke, which is easy to cause jamming. When the magnet is tilted, the coil needs an additional 10%-15% current to compensate for the loss of thrust, resulting in an increase in motor power consumption. In high load scenarios, the camera module is prone to overheating, shortening the component life.

[0004] In the existing camera module, the Hall chip relies on the change of magnetic flux to calculate the lens position. The angular or radial offset of the magnet will increase the linear error of the Hall output, causing the closed-loop positioning deviation to expand, affecting the imaging quality. Some multi-axis OIS (optical image stabilization) relies on the strict symmetry of the magnet-coil array. If the height difference between adjacent magnets is too large, the X / Y axis driving torque is unbalanced, and the anti-shake trajectory appears rotation error, resulting in the edge pixels of the photosensitive chip being offset, which is easy to produce trailing and the like.

[0005] In addition, the consistency of the shoulder height of the magnet determines the overall height of the camera module. If the positioning error of the magnet increases, the entire camera module needs to be additionally compensated by shims, affecting the shoulder height.

[0006] In summary, how to assemble the magnet in the motor and control the positioning accuracy of the magnet is a problem that needs to be solved at present. SUMMARY

[0007] Therefore, it is necessary to provide a camera module motor manufacturing method and motor device for how to assemble the magnet in the motor and control the positioning accuracy of the magnet.

[0008] In one aspect, the present application provides a camera module motor manufacturing method, comprising the following steps:

[0009] Magnets are inserted into the various limiting members of the strip, wherein the strip includes auxiliary material and a plurality of limiting members connected to the auxiliary material, and the limiting members are perpendicular to the auxiliary material.

[0010] By injection molding, injection molding material is formed around the limiting member and the magnet to form a plurality of motor devices; and

[0011] Cut the strip to separate the limiting member from the auxiliary material to obtain the independent motor device.

[0012] In one embodiment, the camera module motor manufacturing method further includes the step of preparing the material strip before the step of inserting the magnets into the respective limiting members of the material strip;

[0013] The steps for preparing the material strip include:

[0014] The auxiliary material and the limiting component before bending are formed by punching;

[0015] By bending and forming, the limiting member is made into a support portion and multiple claws connected to the support portion; and

[0016] The limiting member is bent so that it is perpendicular to the auxiliary material.

[0017] In one embodiment, the step of inserting the magnets into the respective limiting members of the strip includes:

[0018] Prepare magnetic materials, and magnetize each of the magnetic materials to form the magnet;

[0019] Each of the magnets is arranged in the same magnetic pole direction; and

[0020] The magnet is picked up through the suction nozzle and inserted into the limiting member.

[0021] In one embodiment, in the step of sucking up the magnet through the suction nozzle and inserting the magnet into the limiting member, the negative pressure value of the suction nozzle is monitored by an air pressure monitoring device to determine whether the magnet has been sucked up.

[0022] In one embodiment, in the step of picking up the magnet through the nozzle and inserting the magnet into the limiting member, AOI visual inspection is used to automatically detect whether the magnet is inserted into the limiting member, whether the insertion position of the magnet is correct, and whether the limiting member is deformed.

[0023] In one embodiment, the step of molding a plurality of motor devices by injection molding around the limiting member and the magnet includes:

[0024] The magnet is fixed in the injection mold by clamping at least three sides using a clamping mechanism.

[0025] Controlling injection pressure, injection temperature, and mold temperature, wherein the injection pressure is less than 180 MPa, the injection temperature is less than 350°C, and the mold temperature is less than 140°C; and

[0026] By injection molding, the injection molding material is injected into the injection mold to form a plurality of the motor devices.

[0027] In one embodiment, the clamping mechanism is an elastic clamping mechanism.

[0028] In one embodiment, the step of cutting the strip, separating the limiting member from the auxiliary material, to obtain the independent motor device includes:

[0029] The limiting component and the auxiliary material are cut using a cutting die, wherein the cutting die is made of a non-magnetic material; and

[0030] The motor component is removed from the cutting mold by a robotic arm.

[0031] In one embodiment, the step of cutting the strip, separating the limiting member from the auxiliary material, to obtain the independent motor device further includes:

[0032] The motor device is magnetized.

[0033] On the other hand, this application provides a motor device manufactured by any of the camera module motor manufacturing methods described above, comprising:

[0034] A limiting member, the limiting member including a support portion and at least two claws extending from different sides of the support portion; a magnet having a working surface and a non-working surface, the claws clamping the magnet to limit the magnet between the claws and the support portion, the working surface of the magnet protruding from between the claws, and the non-working surface of the magnet abutting against the support portion; and an injection molded part, the injection molded part being injection molded outside the limiting member and the magnet to embed the magnet within the injection molded part.

[0035] In one embodiment, the two claws are located on opposite sides of the support portion to clamp the opposite sides of the magnet.

[0036] In one embodiment, at least one of the claws is located at the bottom of the support to hold the bottom of the magnet.

[0037] In one embodiment, the limiting member further includes at least one connecting strap connected to the support portion, the connecting strap being used to connect to the auxiliary material.

[0038] In one embodiment, the limiting member further includes two connecting straps connected to the support portion, with one of the claws located between the two connecting straps.

[0039] In one embodiment, the surface of the magnet is coated.

[0040] In one embodiment, the limiting member is made of a magnetically conductive material.

[0041] In summary, the camera module motor manufacturing method of this application utilizes the limiting component of the material strip to wrap and position the magnet before performing pull-type injection molding, directly integrating the magnet into the motor device. This method can control the positioning accuracy error of the magnet within ±0.02mm, thereby controlling the thrust fluctuation within ±3%, making the focusing or image stabilization of the camera module faster and more stable.

[0042] The camera module motor manufacturing method of this application eliminates the magnet assembly step, simplifies the motor assembly process, and can achieve cost reduction and efficiency improvement. Attached Figure Description

[0043] Figure 1 A schematic diagram of the steps in a method for manufacturing a camera module motor device is provided for one embodiment of this application;

[0044] Figure 2 A step-by-step schematic diagram of step S100 of the camera module motor device manufacturing method according to the above embodiments of this application is shown;

[0045] Figure 3 A step-by-step schematic diagram of step S200 of the camera module motor device manufacturing method according to the above embodiments of this application is shown;

[0046] Figure 4 A schematic diagram of step S300 of the camera module motor device manufacturing method according to the above embodiments of this application is shown;

[0047] Figure 5 A schematic diagram of step S400 of the camera module motor device manufacturing method according to the above embodiments of this application is shown;

[0048] Figure 6 A perspective view of a motor device provided for one embodiment of this application;

[0049] Figure 7 A perspective view of the magnet of the motor device according to the above embodiments of this application is shown;

[0050] Figure 8 A perspective view of the limiting member of the motor device according to the above embodiments of this application is shown;

[0051] Figure 9 A schematic diagram of a material strip provided for one embodiment of this application;

[0052] Figure 10 A perspective view of the strip without bending limit member according to the above embodiments of this application is shown;

[0053] Figure 11 A perspective view of the strip after bending and limiting member according to the above embodiment of this application is shown;

[0054] Figure 12 A perspective view of the strip after it has been inserted into a magnet according to the above embodiment of this application is shown;

[0055] Figure 13 A perspective view of a motor device formed by injection molding of a strip according to the above embodiments of this application is shown.

[0056] Reference numerals: 10, material strip; 11, limiting component; 111, supporting part; 112, claw; 113, connecting strip; 12, auxiliary material; 121, auxiliary material unit; 1211, material edge; 20, magnet; 30, injection molded part. Detailed Implementation

[0057] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0063] To address the problem of difficulty in controlling the positioning accuracy of magnets assembled in existing camera module motors, this application provides a camera module motor manufacturing method and motor device, which can simplify the motor assembly process and improve the relative position accuracy of magnets in the motor assembly.

[0064] According to one aspect of this application, such as Figure 1 As shown, the method for manufacturing the camera module motor may include the following steps:

[0065] S200. Insert magnets into the respective limiting members of the strip, wherein the strip includes auxiliary material and a plurality of limiting members connected to the auxiliary material, and the limiting members are perpendicular to the auxiliary material.

[0066] S300, By injection molding, injection molding material is formed around the limiting member and the magnet to form a plurality of motor devices; and

[0067] S400, Cut the strip to separate the limiting member from the auxiliary material to obtain the independent motor device.

[0068] It is understandable that the limiting member 11 of the strip 10 can be used to fix the magnet 20. By inserting the magnet 20 into the limiting member 11, the positioning accuracy of the magnet 20 can be accurately controlled by using the limiting member 11 for positioning. By setting multiple vertical limiting members 11 on the auxiliary material 12, not only can a rigid skeleton for positioning the magnet 20 be formed, but it can also support continuous production by pulling the strip, so that multiple motor devices can be formed by subsequent continuous injection molding. After multiple motor devices are formed by injection molding, multiple motor devices can be separated by cutting the strip 10. In this way, the camera module motor manufacturing method uses the limiting member 11 of the strip 10 to wrap and position the magnet 20 and then performs pull-type injection molding to directly integrate the magnet 20 into the motor device. This can control the positioning accuracy error of the magnet 20 within the range of ±0.02mm, thereby controlling the thrust fluctuation within the range of ±3%, making the focusing or image stabilization of the camera module faster and more stable. In addition, the camera module motor manufacturing method eliminates the assembly step of magnet 20, simplifies the motor assembly process, and can reduce costs and increase efficiency.

[0069] Optionally, such as Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown, in some embodiments, the camera module motor manufacturing method further includes, before the step of inserting magnets into the respective limiting members of the material strip: S100, preparing the material strip.

[0070] The steps for preparing the material strip include:

[0071] S110. The auxiliary material and the limiting member before bending are formed by punching.

[0072] S120. By bending and forming, the limiting member is made into a supporting part and a plurality of claws connected to the supporting part; and

[0073] S130. Bend the limiting member so that the limiting member is perpendicular to the auxiliary material.

[0074] Referring to the above steps, the strip 10 is a stamped part. It can first be formed by punching to form the auxiliary material 12 and the unbent limiting part 11; then, by bending, the unbent limiting part 11 is bent into a structure including a support part 111 and multiple claws 112. The claws 112 are arranged around the support part 111 and can cooperate with the support part 111 to clamp the magnet 20; finally, by bending the limiting part 11, the limiting part 11 is kept perpendicular to the auxiliary material 12 so that the magnet 20 can be inserted into the limiting part 11 later.

[0075] Optionally, such as Figure 9 As shown, in some embodiments, the limiting member 11 is disposed on the inner edge of the auxiliary material 12, which makes the layout of the limiting member 11 and the auxiliary material 12 more reasonable, thereby saving the raw material cost of the strip 10.

[0076] Optionally, such as Figure 9 As shown, in some embodiments, the auxiliary material 12 may include a plurality of auxiliary material units 121, which are arranged sequentially in one direction so that a strip 10 can be used for pull-type injection molding. Each auxiliary material unit 121 may include at least two limiting members 11 so that each auxiliary material unit 121 can be used for injection molding of at least two motor devices.

[0077] Optionally, in some embodiments, each auxiliary material unit 121 may include four material edges 1211 arranged in a rectangle, and each material edge 1211 may be provided with at least one limiting member 11, forming a double-sided arrangement structure, a three-sided arrangement structure, and / or a four-sided arrangement structure. In this way, the limiting members 11 can be arranged more compactly, thereby further saving raw material costs.

[0078] It is worth noting that the limit punching dimensions of strip 10 can be controlled within a material thickness range of 0.05mm to 0.2mm, as well as a material width and gap of 1.5mm × 1.5mm.

[0079] Optionally, in some embodiments, during the preparation of the strip 10, the punching shape accuracy of the auxiliary material 12 and the limiting member 11 is controlled within the range of ±0.005mm, and the bending accuracy of the claw 112 is controlled within the range of ±0.005mm, so as to ensure the positioning accuracy of the limiting member 11 on the magnet 20.

[0080] Furthermore, such as Figure 3 and Figure 12 As shown, in some embodiments, the step of inserting the magnets into the respective limiting members of the strip includes:

[0081] S210. Prepare magnetic materials, and magnetize each of the magnetic materials to form the magnet;

[0082] S220, Arrange each of the magnets in the same magnetic direction; and

[0083] S230. The magnet is picked up through the suction nozzle and inserted into the limiting member.

[0084] Referring to the above steps, by arranging each magnet 20 material in the same magnetic direction, the direction of the magnetic force can be 100% controlled, so that the magnetic force direction is oriented, which facilitates the suction nozzle to pick up the magnet 20 for subsequent magnet 20 insertion. This enables the suction nozzle to pick up the magnet quickly and continuously, thereby improving production efficiency.

[0085] Because there is a risk of the magnet 20 falling off during the automatic insertion of the magnet 20 through the suction nozzle, in some embodiments, during the step of picking up the magnet through the suction nozzle and inserting it into the limiting member, a pneumatic pressure monitoring device monitors the negative pressure value of the suction nozzle to determine whether the magnet has been picked up. By monitoring the negative pressure value of the suction nozzle in real time during the picking process, it is determined whether the magnet 20 is adsorbed on the suction nozzle. If there is negative pressure on the suction nozzle, it means that the magnet 20 is adsorbed; if there is no negative pressure on the suction nozzle, it means that the magnet 20 is not adsorbed. In this way, it is possible to monitor whether the magnet 20 is adsorbed on the suction nozzle in real time, preventing the risk of material leakage.

[0086] Furthermore, the automatic insertion of the magnet 20 via the suction nozzle carries risks such as missed insertion, improper insertion, or deformation of the limiting member 11 after insertion. In some embodiments, during the step of picking up the magnet via the suction nozzle and inserting it into the limiting member, AOI visual inspection is used to automatically detect whether the magnet is inserted into the limiting member, whether the insertion position is correct, and whether the limiting member is deformed. Thus, visual inspection enables closed-loop control throughout the entire process, completely eliminating potential risks during the automatic picking up and insertion of the magnet 20 via the suction nozzle.

[0087] It is worth noting that during the insertion of the magnet 20 into the limiting member 11, it is easy to generate dust by friction with the limiting member 11. At this time, a coating can be applied to the surface of the magnet 20 to increase the hardness of the magnet 20, thereby protecting the magnet 20 and preventing the magnet 20 from generating dust by friction with the limiting member 11.

[0088] Optionally, such as Figure 4 and Figure 13 As shown, in some embodiments, the step of molding a plurality of motor devices by injection molding around the limiting member and the magnet includes:

[0089] S310. The magnet is fixed in the injection mold by clamping at least three sides using a clamping mechanism.

[0090] S320, controlling injection pressure, injection temperature, and mold temperature, wherein the injection pressure is less than 180 MPa, the injection temperature is less than 350°C, and the mold temperature is less than 140°C; and

[0091] S330. The injection material is injected into the injection mold by tape injection molding to form a plurality of the motor devices.

[0092] Following the steps outlined above, by clamping at least three sides of the magnet 20, it is ensured that the magnet 20 is fixed in the injection mold, preventing deviations during injection molding and ensuring precise positioning of the injection molded part 30 and the magnet 20, thereby improving the positioning accuracy of the magnet 20. By controlling the injection pressure, injection temperature, and mold temperature, the injection molded part 30 can be molded at a low mold temperature, avoiding the influence of high mold temperature and high material temperature on the magnet 20, which could lead to magnetic attenuation. Controlling the injection pressure to less than 180 MPa is beneficial for the molding of the injection molded part 30, and controlling the injection temperature to less than 350°C and the mold temperature to less than 140°C can control the demagnetization rate of the magnet 20 to less than 5%.

[0093] Furthermore, in the step of clamping at least three sides of the magnet to fix the magnet in the injection mold by means of the clamping mechanism, the clamping mechanism clamps six sides of the magnet to ensure that the injection molded part 30 and the magnet 20 can be positioned more accurately.

[0094] Because high pressure can easily cause the magnet 20 to crack, in some embodiments, the clamping mechanism is an elastic clamping mechanism. This elastic clamping mechanism provides a certain buffer, preventing the magnet 20 from cracking.

[0095] It is worth noting that during injection molding, the magnet 20 is held and positioned in the injection mold by the clamping mechanism, so the part held by the clamping mechanism will be exposed. Normally, the clamping mechanism clamps and positions the material strip 10 at the jaws 112 and the connecting strip 113. After injection molding, the material strip 10 at the jaws 112 and the connecting strip 113 will be exposed.

[0096] Optionally, such as Figure 5 As shown, in some embodiments, the step of cutting the strip and separating the limiting member from the auxiliary material to obtain the independent motor device includes:

[0097] S410. The limiting member and the auxiliary material are cut using a cutting die, wherein the cutting die is made of a non-magnetic material; and

[0098] S420. The motor device is removed from the cutting mold by a robotic arm.

[0099] Following the steps outlined above, after removing auxiliary material 12 using the cutting die, a single motor component with magnet 20 can be obtained. The cutting die is made of non-magnetic material, preventing it from adhering to the motor component and ensuring no tilting or jamming occurs during the unloading process. The robotic arm can employ a contour-following gripper structure to maintain the motor component's center of gravity balance during placement and handling.

[0100] It is worth noting that in the above-mentioned camera module motor manufacturing method, the scheme of pre-magnetizing the magnet 20 requires a demagnetization rate of less than 5%. If the magnetic loss of the magnet 20 is too large during the injection molding process of the motor component, and the demagnetization rate exceeds 5%, then a scheme of injection molding followed by magnetization can be adopted. Therefore, if... Figure 5 As shown, in some embodiments, the step of cutting the strip and separating the limiting member from the auxiliary material to obtain the independent motor device further includes:

[0101] S430, Magnetize the motor device.

[0102] This ensures that the magnet 20 has sufficient magnetic force, eliminating the defect of excessive magnetic force loss in the magnet 20 that exists in the method of integral injection molding of motor components.

[0103] On the other hand, such as Figure 6 , Figure 7 and Figure 8 As shown, this application provides a motor device that can be manufactured by any of the camera module motor manufacturing methods described above. The motor device may include a limiting member 11, a magnet 20, and an injection-molded part 30. The limiting member 11 may include a support portion 111 and at least two claws 112 extending from different sides of the support portion 111. The magnet 20 has a working surface and a non-working surface. The claws 112 clamp the magnet 20 so that the magnet 20 is confined between the claws 112 and the support portion 111. The working surface of the magnet 20 protrudes from between the claws 112, and the non-working surface of the magnet 20 abuts against the support portion 111. The injection-molded part 30 is injection-molded outside the limiting member 11 and the magnet 20 to embed the magnet 20 within the injection-molded part 30.

[0104] In this way, compared with the traditional motor assembly scheme, the assembly step of the magnet 20 is eliminated. Instead, a one-piece injection molding process is used, in which the magnet 20 is fixed to the limiting member 11 and embedded in the injection molded part 30. This not only improves the positioning accuracy of the magnet 20, but also reduces the assembly cost of the motor, achieving cost reduction and efficiency improvement. The working surface of the magnet 20 is exposed between the claws 112 of the limiting member 11, and can interact with the coil to generate magnetic induction force.

[0105] Optionally, such as Figure 7 and Figure 8As shown, in some embodiments, two claws 112 are located on opposite sides of the support portion 111 to clamp opposite sides of the magnet 20. In this way, the two claws 112 can respectively limit the two sides of the magnet 20, ensuring the structural stability of the magnet 20 and the limiting member 11.

[0106] Optionally, such as Figure 7 and Figure 8 As shown, in some embodiments, at least one claw 112 is located at the bottom of the support portion 111 to clamp the bottom of the magnet 20. In this way, the claw 112 can support the bottom of the magnet 20, strengthen the limiting of the magnet 20, and further improve the structural stability of the magnet 20 and the limiting member 11.

[0107] Optionally, such as Figure 7 and Figure 8 As shown, in some embodiments, the limiting member 11 further includes at least one connecting strip 113 connected to the supporting portion 111, and the connecting strip 113 is connected to the auxiliary material 12. Thus, the supporting portion 111 of the limiting member 11 is connected to the auxiliary material 12 via the connecting strip 113. Cutting the connecting strip 113 allows the supporting portion 111 of the limiting member 11 to be separated from the auxiliary material 12. After injection molding, the motor component can be removed from the auxiliary material 12 simply by cutting the connecting strip 113.

[0108] Optionally, such as Figure 7 and Figure 8 As shown, in some embodiments, the limiting member 11 further includes two connecting straps 113 connected to the supporting portion 111, with one claw 112 located between the two connecting straps 113. In this way, by providing two connecting straps 113, the connection between the limiting member 11 and the auxiliary material 12 can be enhanced.

[0109] Optionally, in some embodiments, the surface of the magnet 20 is provided with a coating. This coating is used to increase the surface mechanical strength of the magnet 20 and prevent damage when the magnet 20 is inserted into the limiting member 11. The coating can be a nickel-based coating (Ni-Cu-Ni) or a DLC diamond-like carbon coating.

[0110] In some embodiments, the limiting member 11 is made of a magnetically conductive material. In this way, the limiting member 11 can serve as a magnetically conductive sheet for the magnet 20, guiding and optimizing the magnetic field emitted by the magnet 20, concentrating the magnetic field within the effective range of the coil, thereby significantly increasing the magnetic field line density (B value) cut by the coil. According to the thrust formula F=BIL, the greater the magnetic field line density (B value) cut by the coil, the higher the efficiency of the motor.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A camera module motor manufacturing method, characterized by, The method comprises the following steps: inserting magnets into each of the limiting members of a material strip, wherein the material strip comprises a material and a plurality of limiting members connected to the material, and the limiting members are perpendicular to the material; molding injection material around the limiting members and the magnets by injection molding to form a plurality of motor devices; and cutting the material strip to separate the limiting members from the material to obtain independent motor devices. The method further comprises a step of preparing the material strip before the step of inserting the magnets into each of the limiting members of the material strip. The step of preparing the material strip comprises: forming the material and the limiting members before bending by punching; bending the limiting members to form a supporting portion and a plurality of claws connected to the supporting portion; and bending the limiting members to make the limiting members perpendicular to the material.

2. The camera module motor manufacturing method of claim 1, wherein, The step of inserting the magnets into each of the limiting members of the material strip comprises: preparing magnet materials, magnetizing each of the magnet materials to form the magnets; arranging each of the magnets in the same magnetic pole direction; and sucking the magnets by a suction nozzle and inserting the magnets into the limiting members.

3. The camera module motor manufacturing method of claim 2, wherein, In the step of sucking the magnets by the suction nozzle and inserting the magnets into the limiting members, a gas pressure monitoring device is used to monitor the negative pressure value of the suction nozzle to determine whether the magnets are sucked.

4. The camera module motor manufacturing method of claim 2, wherein, In the step of sucking the magnets by the suction nozzle and inserting the magnets into the limiting members, an AOI visual inspection is used to automatically detect whether the magnets are inserted into the limiting members, whether the insertion positions of the magnets are correct, and whether the limiting members are deformed.

5. The camera module motor manufacturing method of claim 1, wherein, The step of molding injection material around the limiting members and the magnets by injection molding to form a plurality of motor devices comprises: clamping at least three surfaces of the magnets by a clamping mechanism to fix the magnets in an injection mold; controlling injection pressure, injection temperature, and mold temperature, wherein the injection pressure is less than 180 MPa, the injection temperature is less than 350°C, and the mold temperature is less than 140°C; and injecting the injection material into the injection mold by injection molding to form a plurality of the motor devices.

6. The camera module motor manufacturing method of claim 5, wherein, The clamping mechanism is an elastic clamping mechanism.

7. The camera module motor manufacturing method of claim 1, wherein, The step of cutting the material strip to separate the limiting members from the material to obtain independent motor devices comprises: cutting the limiting members and the material by a cutting mold, wherein the cutting mold is made of a non-magnetic material; and removing the motor devices from the cutting mold by a mechanical hand.

8. The camera module motor manufacturing method of claim 7, wherein, The step of cutting the material strip to separate the limiting members from the material to obtain independent motor devices further comprises: magnetizing the motor devices.

9. A motor device characterized by comprising: A camera module motor manufactured by the method according to any one of claims 1 to 8, comprising: a limiting member comprising a supporting portion and at least two claws extending from different sides of the supporting portion. A magnet having a working surface and a non-working surface, the clamping claws clamping the magnet so that the magnet is limited between the clamping claws and the supporting part, the working surface of the magnet being exposed from between the clamping claws, and the non-working surface of the magnet abutting against the supporting part; and An injection molded part formed by injection molding outside the limiting part and the magnet to embed the magnet in the injection molded part.

10. The motor device according to claim 9, characterized by Two of the clamping claws are respectively located on opposite sides of the supporting part to clamp opposite sides of the magnet.

11. The motor device according to claim 9, characterized by At least one of the clamping claws is located at the bottom of the supporting part to clamp the bottom of the magnet.

12. The motor device according to claim 9, characterized by The limiting part further comprises at least one connecting band connected to the supporting part, the connecting band being used to be connected to the auxiliary material.

13. The motor device according to claim 12, characterized by The limiting part further comprises two connecting bands connected to the supporting part, and one of the clamping claws is located between the two connecting bands.

14. The motor device according to claim 9, characterized by The surface of the magnet is provided with a plating layer.

15. The motor device according to claim 9, characterized by The limiting part is made of a magnetic conductive material.

Images