Base, voice coil motor, and method for manufacturing the same

Abstract

The present invention provides a base comprising at least two plastic barriers located on a vertical plane and arranged at intervals along a continuous locus, a metal circuit including a plurality of branches consisting of pins exposed outside the plastic barriers and arranged at intervals in parallel, a fillet exposed on a side surface of the plastic barrier, and a connection part connecting the pin and the fillet, and a coil electrically connected to the metal circuit, the plastic barriers being molded by primary injection molding, a part of the connection part being exposed between two adjacent plastic barriers, the connection part being formed by folding the plastic barriers to be located on different planes to form a folding part, and at least one connection pillar part connecting between the two adjacent plastic barriers being formed by secondary injection molding outside the folding part. According to the present invention, the technical problem of not being able to vertically mount coils and electronic products is solved, which helps to improve the design freedom of voice coil motors.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with an application date of February 5, 2021 and an application number of 202110166191.9, and all of its contents are incorporated herein by reference.

[0002] The present invention relates to the technical field of pedestals with integrated coils, voice coil motors, and manufacturing methods thereof, and particularly to pedestals, voice coil motors for the field of electronic devices, and manufacturing methods thereof.

Background Art

[0003] Conventional pedestals with coils and voice coil motors generally include a pedestal, a metal wire injection-molded in the pedestal, an electrical element welded to the metal wire, a coil formed by winding or a coil assembled by mounting, and a drive assembly such as a magnetic structure that operates interactively with the coil. Generally, the assembler of a voice coil motor needs to electrically assemble the above basic components, but usually, it is difficult to layout each component according to the layout and mounting needs of various components, and it is also necessary to reserve an assembly space for certain relay connection components. For example, in the case of a flexible printed circuit (FPC) that needs to integrate an IC or a coil, it is necessary to reserve at least a part of the vertical space and design an assembly space for integrating the IC or the coil on the FPC.

[0004] Specifically, for example, usually, a voice coil motor is used to arrange a coil on a flexible circuit board (FPC: Flexible Printed Circuit) and weld it to a metal circuit in a pedestal to achieve a line connection function by using a surface assembly process of the flexible circuit board. For example, the utility model patent with the publication number CN209134273U discloses a connection structure applied to a voice coil motor including an injection molded product and a flexible circuit board (FPC). The injection molded product has a plurality of side walls sequentially connected in the circumferential direction to form a hollow cavity, and a positioning cavity penetrating the hollow cavity is opened in one of the side walls. The flexible circuit board FPC is attached to the side wall having the positioning cavity, and an IC and a coil are mounted or wound on the FPC to achieve the function of circuit conduction.

[0005] Also, like the invention patent application with the publication number CN108989511A, in a base and a voice coil motor having electrical elements, the electrical elements are integrated on a vertical surface of plastic, and the subsequent mounted coils are also mounted on the vertical surface of plastic. Then, it is necessary to go through the mounting by surface mount technology (SMT: Surface Mount Technology). Moreover, since the mounting by SMT requires that the side of the mounting surface be open, the winding and mounting of the coils are relatively difficult, and the requirements for the position design of the coils are very high. Therefore, integrating electrical elements (IC: Integrated Circuit) and coils on a vertical surface is difficult to automate, requires complicated manual operations, results in reduced efficiency, and is inferior in quality stability. On the other hand, even if the ICs and coils are integrated on a pedestal located on a horizontal plane, only one-by-one assembly can be performed, and the automation efficiency of the assembly is very low. It should be noted that all currently commercially available SMT mounting equipment processes pedestals one by one instead of in batch.

[0006] The above problems occur concentratedly when conventional voice coil motor manufacturers produce voice coil motors. In this case, it is necessary to outsource parts and then position and assemble them on elements such as flexible circuit boards / domes. However, the positioning, processing, and assembly processes are complex, the operating space is limited, it is easy to cause part defects, and furthermore, the overall cost becomes excessive. At the same time, when producing these outsourced parts, the problem of the combination space design is ignored without considering the combination cases. Therefore, it is necessary to reserve some mounting sites when designing the voice coil motor, resulting in waste of space and inability to make the product structure compact and miniaturized. In addition, existing coils generally need to be integrated with the metal circuit in the pedestal by being integrated on an independent FPC. However, the FPC is thin and brittle by itself and the cost is quite high. Therefore, it is difficult to wind the coil around the FPC or mount the coil, and it is easy to cause defects. Moreover, the number of windings that can be wound and the thickness of the coil are affected by the thickness of the FPC, which further affects the magnitude of the energizing current of the coil and increases the circuit loss. In addition, when winding or mounting the coil on an independent FPC, since the FPC is flexible, when the electronic device drops, the voice coil motor having the coil fixed to the FPC is likely to fail as a whole because its integration strength is weak.

[0007] Therefore, in order to overcome the above drawbacks, there is indeed a need to provide a new pedestal with a coil, a voice coil motor, and their manufacturing methods.

Summary of the Invention

[0008] An object of the present invention is to provide a pedestal with an integrated coil, a voice coil motor, and their manufacturing methods.

[0009] The object of the present invention is achieved by a pedestal comprising the following technical solution 1, namely at least two plastic barriers located in a vertical plane and arranged at intervals along a continuous locus, pins embedded in at least two of the plastic barriers, exposed outside the plastic barriers and arranged in parallel at intervals, fillets exposed on the side surfaces of the plastic barriers, and a metal circuit including a plurality of branches composed of connecting portions connecting the pins and the fillets, a coil electrically connected to the metal circuit, wherein the at least two plastic barriers are formed by one-shot injection molding, the coil is welded to the fillet, a part of the connecting portion is exposed between two adjacent plastic barriers, the connecting portion is bent so that the at least two plastic barriers are located in different planes to form a bent portion, and at least one connecting post portion connecting between two adjacent plastic barriers is formed by secondary injection molding outside the bent portion.

[0010] Furthermore, it further includes a base for positioning and connecting at least two of the plastic barriers.

[0011] Furthermore, the base is provided integrally with the connecting post portion or separately.

[0012] Furthermore, the base surrounds an adjustment space together with the plastic barrier and the connecting post portion.

[0013] Furthermore, the adjustment space is a columnar space that is not sealed in the vertical direction.

[0014] Furthermore, the pedestal has four sides, there are three plastic barriers, which are respectively arranged on three of the sides to form a U shape, and the remaining side of the four sides is open.

[0015] Furthermore, an attachment space is formed on the remaining side where the three plastic barriers are not provided on the base.

[0016] Furthermore, every two adjacent plastic barriers are integrally connected via the connecting post portion and are formed by planar transfer molding.

[0017] Furthermore, a certain angle is formed between every two adjacent plastic barriers.

[0018] Furthermore, an electrical element welded to the fillet is provided on the plastic barrier.

[0019] Furthermore, the electrical element is a drive integrated circuit element including a Hall element or a Hall sensor.

[0020] Furthermore, the pins of each branch are located in a horizontal plane perpendicular to the vertical plane, and the fillet is located in the vertical plane.

[0021] Furthermore, the pins are located outside any one of the plastic barriers.

[0022] The object of the present invention is achieved by the following technical solution 2, that is, a voice coil motor provided with the above pedestal.

[0023] Furthermore, the voice coil motor is a periscope type voice coil motor, includes a reflecting element provided in the adjustment space, and the reflecting element is a mirror or a prism.

[0024] The object of the present invention is achieved by the following technical solution 3, that is, a voice coil motor having an anti-shake function, which comprises an external casing, a mounting casing, an anti-shake magnetic element mounted on the mounting casing, an autofocus magnetic element, a movable module composed of a lens and a holder for mounting the lens, and the above pedestal.

[0025] The object of the present invention is the following technical solution 4, that is, A first step of forming a plurality of independent metal circuits including a plurality of branches each consisting of pins 1a arranged in parallel at intervals on a material belt, fillets 1b provided opposite to the pins 1a, and connecting portions 1c connecting the pins 1a and the fillets 1b; A second step of injection molding at least two plastic barriers arranged at intervals along a continuous locus located in a vertical plane on the metal circuit, and exposing a part of the connecting portion between two adjacent plastic barriers; A third step of welding a coil to the plastic barrier; A fourth step of bending the connecting portion so that at least two of the plastic barriers are located in different vertical planes to form a bent portion; A fifth step of secondarily injection molding a connecting post portion connecting two adjacent plastic barriers at the bent portion to form a first semi-finished product; It is achieved by a manufacturing method for manufacturing the above pedestal, including a sixth step of cutting the material belt corresponding to the first semi-finished product to form a plurality of independent complete pedestals.

[0026] Furthermore, in a seventh step between the first step and the second step, the pins are bent so that the pins and the fillets are located in different planes. There are three plastic barriers in the second step, and the fifth step further includes secondarily injection molding a base connecting the three plastic barriers.

[0027] The object of the present invention is achieved by a manufacturing method for a voice coil motor including the following technical solution 5, that is, a manufacturing method for manufacturing the above pedestal.

[0028] According to the pedestal with integrated coils of the present invention, a metal circuit is provided on the pedestal, and coils interacting with magnetic elements are integrated. The metal circuit provided on the horizontal plane has a plurality of branches. At least two plastic barriers are injection-molded at intervals on the metal circuit, and the connection part of the branches between at least two plastic barriers is bent so that at least two plastic barriers are located in different vertical planes. Further, a base connecting the at least two plastic barriers is secondarily injection-molded at the connection part. Also, the normal base is located on the horizontal plane, and at least two plastic barriers are located in two vertical planes perpendicular to the base, thereby realizing a pedestal with a three-dimensional structure. There is no need to separately mount a flexible circuit board, reducing the assembly cost and improving the yield. At the same time, the technical problem that coils and electronic products cannot be vertically mounted is solved, which helps to improve the design freedom of the voice coil motor. Also, since both the coils and the electrical elements are integrated on the plastic barriers, the structure of the product becomes more compact and smaller. When the electronic device drops, the bobbin with coils is not too soft to fail. Also, the pedestal can manufacture a plurality of pedestals on one material belt by injection-molding two plastic barriers on the same plane, enabling mass production and automation.

Brief Description of the Drawings

[0029]

Figure 1

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Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0030] In the description of the present invention, the terms indicating the orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of clarifying and simplifying the description of the present invention, and do not indicate or imply that the shown device or member must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0031] In addition, in the description of the present invention, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the situation.

[0032] In the prior art, both the coil and the electrical element in a normal voice coil motor are integrated on a flexible printed circuit board (FPC) or within a vertical plane, and it is necessary to wind or mount the coil or the electrical element within the vertical plane. The operating space is limited, positioning and integration are very difficult, and processing and integration are only carried out for a single pedestal and a single coil or electrical element, so the integration efficiency is low, which is disadvantageous for reducing the cost and improving the efficiency of automated mass production. In contrast, in the present invention, first, three plastic barriers 3 are injection-molded at intervals on a horizontal plane located in the same plane as the metal circuit 1. Next, the electrical element 4 and the coil 2 are electrically assembled or mounted on the plastic barrier 3. Next, a part of the metal circuit 1 located between the three plastic barriers 3 is bent so that the three plastic barriers 3 are located in different vertical planes. Further, secondary injection molding is performed to form a base 5 connecting the horizontal planes of the three plastic barriers 3, thereby integrating the coil 2 and the electrical element 4 in the voice coil motor on the plastic barrier 3 in a vertical plane perpendicular to the horizontal plane. In this way, after the injection molding is completed, there is no need to perform recombination and mounting of the flexible printed circuit board (FPC) and the coil, and the assembly cost is reduced and the yield is improved. In addition, electrical mounting is advantageous even when applied when the space perpendicular to the mounting surface is vertically open. However, when there are two mounting surfaces that are parallel with a vertical interval, it is not advantageous for electrical assembly by mounting, and only manual work has to be adopted. Therefore, the technical problem that the vertical mounting of the wound air-core coil 2 and the electrical element 4 is difficult is also solved, which helps to improve the degree of freedom in the internal space design of the voice coil motor 1000, and the internal structure of the voice coil motor product is also more compact and miniaturized. Hereinafter, with reference to FIGS. 1 to 11, the pedestal 100 of the present invention, the voice coil motor 1000 including the pedestal 100, and their manufacturing methods will be described.

[0033] The voice coil motor is an important component used for camera focusing and anti-shake. The main principle of the voice coil motor is to control the tensile position of the spring piece and move the lens up and down by changing the magnitude of the direct current in the coil within the permanent magnetic field. In the cameras of mobile phones, the autofocus function using the voice coil motor is widely used, and the position of the lens can be adjusted by the voice coil motor to present a clear image.

[0034] In the drive by a conventional open-loop voice coil motor for auto focusing (AF), the stroke that needs to be moved during focusing cannot be known, and it is necessary to take the full stroke. Requirements are satisfied as parameters such as contrast, recorded in the current, and the current is resupplied to the coil of the voice coil motor to perform focusing. The closed-loop voice coil motor has a hall sensor mounted on its internal drive IC. This sensor is a type of position sensor that can measure the magnetic flux amount (gauss value) in a magnetic field and further determine the position of an object. The closed-loop voice coil motor introduces a function of detecting current using this sensor, that is, by adding a closed-loop control of negative feedback, it can be made more accurate for each movement of the lens. In other words, the number of reciprocating movements of the lens can be reduced, and the focusing speed can be improved. The linearity of the open-loop voice coil motor is determined by the change in the magnitude of the magnetic thrust at different strokes of the coil and the auto-focus magnetic element and the change due to the non-linearity of the elastic piece. In contrast, the closed-loop voice coil motor is completely determined by the arrangement of the hall sensor and the hall magnetic element and the linearity compensation of the drive IC. The closed-loop voice coil motor applies a vibration damping adhesive to control oscillation, reducing the convergence time to stability when the movable module reaches the position. Also, the position of the closed-loop voice coil motor does not depend on the current but on the positions of the hall sensor and the hall magnetic element, so the posture difference is greatly reduced. Moreover, when the drive IC writes to the motor, it performs a linearity compensation calculation using the hall value and the code, and can greatly optimize the linearity. The advantage of the open-loop voice coil motor is that auto focusing is achieved, and Chinese technology is mature and stable, with low labor costs and material costs. Its disadvantages are that it takes time for focusing, the positioning point is not accurate, and it has a blurring effect on the video. The advantages of the closed-loop voice coil motor are its fast focusing speed and high focusing accuracy. Its disadvantages are that Chinese technology is not very mature, the production difficulty is high, the cost is high, and it is prone to generating abnormal sounds at high frequencies.The advantages of the optical image stabilization voice coil motor are that it has an image stabilization function, the image is clear, the noise is reduced, and the shooting quality in a dark environment is improved. Its disadvantages are that Chinese technology is not very mature, the manufacturing process is quite complicated, and the cost is relatively high.

[0035] The present invention relates to a voice coil motor (VCM: Voice Coil Motor) 1000. The form of this voice coil motor can be selected from types such as a switch voice coil motor, a closed-loop voice coil motor, a ball-type voice coil motor, or a periscope-type voice coil motor. In the present invention, a voice coil motor that drives mainly in at least two directions on a horizontal plane is applied. In the embodiment for implementing the present invention, since three barriers are provided, specifically, it is applied to a scene where the voice coil motor 1000 that moves in the X-axis direction, Y-axis direction on a horizontal plane, and Z-axis direction in a vertical plane is driven. The present invention relates to a periscope-type voice coil motor 1000 or a ball-type voice coil motor 1000 with an image stabilization function. In the present invention, the voice coil motor 1000 with an image stabilization function is taken as an example.

[0036] As shown in FIG. 1, the voice coil motor 1000 includes an external casing 1001, a mounting casing 1002, a pair of anti-shake magnetic elements 1003 and autofocus magnetic elements 1003' mounted on the mounting casing 1002, a movable module (lens 1004, a holder 1005 for mounting the lens 1004), and a pedestal 100 on which a coil 2 interacting with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' is integrated. The anti-shake magnetic element 1003, the autofocus magnetic element 1003', the lens 1004, and the holder 1005 for mounting the lens 1004 are called a movable module. In the present invention, by integrating the coil 2 on the pedestal 100 and realizing the movement in each direction (X-axis, Y-axis, and Z-axis) together with the movable module, various functions of the voice coil motor 1000 are realized. Specifically, the type of the voice coil motor according to the present invention may specifically be a periscope type voice coil motor. In the periscope type voice coil motor, the movable module may specifically include a prism or a mirror that is a linear motion drive target or an anti-shake processing target.

[0037] Referring to FIGS. 1 to 11, the voice coil motor 1000 having the anti-shake function includes a pair of anti-shake magnetic elements 1003. In accordance with the anti-shake magnetic element 1003, a drive coil 2 integrated on the pedestal 100 is further provided. The drive coil 2 integrated on the pedestal 100 drives the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' to realize the anti-shake function of the voice coil motor and the movement in the circumferential direction (X-axis, Y-axis, Z-axis). The present invention will be specifically described below with reference to FIGS. 1 to 9.

[0038] The external casing 1001 is for fixing, attaching, and protecting the external physical structure of the voice coil motor 1000, and is usually made of a metal material. The lens 1004 is attached to the adjustment space 51 described later to realize the movement of the lens in the horizontal direction (X-axis and Y-axis) or the vertical direction (Z-axis), and to realize the focusing and anti-shake control. The anti-shake magnetic element 1003 and the autofocus magnetic element 1003' generate a magnetic field, and usually have a driving and anti-shake adjustment effect of interacting with the coil 2 to drive the lens to move. When the coil 2 is energized, it generates a driving torque and cooperates with the magnetic fields generated by the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' to adjust the movement of the lens 1004. The holder 1005 is for mounting and placing the lens 1004. The pedestal 100 is for fixing these members and providing a circuit for supplying power to the coil 2 and the focus coil attached to the holder 1005. In the prior art, the holder 1005 for placing the lens 1004 has an air-core coil wound around the outer periphery of the holder 1005, and further interacts with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' to adjust the lens. In the present invention, the coil 2 is integrated into the pedestal 100 without providing the coil 2 in the holder 1005 for placing the lens 1004. At the same time, the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' in the present invention can interact with the coil 2 to realize the movement in the horizontal direction (X-axis and Y-axis) and the vertical direction (Z-axis).

[0039] Referring to FIGS. 1 to 11, the present invention relates to a pedestal 100 applicable to the voice coil motor 1000 described above. This pedestal 100 is provided with at least two plastic barriers 3 in at least two vertical planes corresponding to the focusing function and the anti-shake function of the voice coil motor 1000. The plastic barrier 3 is provided with a coil 2 for realizing the focusing function and the anti-shake function. In order to facilitate the integrally molding of at least two plastic barriers 3 by primary injection molding in the same plane, the separated plastic barriers 3 are individually molded. Next, the metal circuit 1 exposed between at least two plastic barriers 3 is bent so that the three plastic barriers 3 are positioned in at least two vertical planes. Furthermore, a base 5 for positioning and connecting at least two of the plastic barriers 3 is secondarily injection molded between at least two of the plastic barriers 3. The plastic barrier 3 is provided with an electrical element 4 and a coil 2 having at least an inductive function according to the positions and magnetic drive requirements of the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' of the voice coil motor. The welding of the electrical element 4 and the coil 2 to the metal circuit 1 can be performed collectively in the same plane after the primary injection molding. Furthermore, three plastic barriers can be automatically integrally molded in the same plane, and then the automated welding with the electrical element 4 and the coil 2 can be realized in the same plane. In this way, it is not only advantageous for the positioning clamp of the injection molding, but also advantageous for the welding yield of the electrical element 4 and the coil 2, which is beneficial to improving the molding and assembly efficiency and yield of the pedestal 100 of the voice coil motor 1000 and improving the production efficiency of automated manufacturing. The integrated electrical element 4 can realize a closed-loop control function for focusing, and the corresponding integrated coil 2 can cooperate with the corresponding anti-shake magnetic element 1003 and autofocus magnetic element 1003' to realize focusing drive and anti-shake drive. The number of the electrical elements 4 is not limited, and the number of the electrical elements 4 can be determined according to the specific number of inductances integrated in the voice coil motor.The number of the coils 2 needs to be at least three in order to act in accordance with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003'. The form of the coil may adopt a wound hollow coil, a chip-type flexible circuit coil (FP Coil), etc. In the present invention, the specific form of the coil is not limited, but in the most preferred form of the present invention, a chip-type flexible circuit coil 2 or a wound coil 2' is adopted. In the present invention, three plastic barriers 3 are provided.

[0040] The pedestal 100 includes three plastic barriers 3 arranged vertically at intervals, a metal circuit 1 embedded in the plastic barrier 3, a coil 2 electrically connected to the metal circuit 1, an electrical element 4 welded to the metal circuit 1, and a base 5 for positioning and connecting the plastic barriers 3. The metal circuit 1 includes a plurality of branches 10 composed of pins 1a exposed outside the plastic barrier 3 and arranged in parallel at intervals, fillets 1b exposed on the side surfaces of the plastic barrier 3, and connection portions 1c connecting the pins 1a and the fillets 1b. The plastic barrier 3 is overmolded on the metal circuit 1 by primary injection molding. The coil 2 is provided in the plastic barrier 3. A part of the connection portion 1c is exposed between each of the plastic barriers 3. A part of the exposed connection portion 1c is bent to form a bent portion 1d so that the three plastic barriers 3 are located in different vertical planes perpendicular to the horizontal plane. The bent portion 1d is located outside the plastic barrier 3 and is formed in the base 5 connecting the three plastic barriers 3 by secondary injection molding. In this process, a connecting post portion composed of a first connecting post portion 531 and a second connecting post portion 532 connecting between two adjacent plastic barriers 3 is formed. The base 5 is provided integrally with the connecting post portion 531 / 532 or separately. Each time at least two plastic barriers 3 are molded, at least one connecting post portion may be molded.

[0041] Referring to FIGS. 2 to 11, the pedestal 100 is provided with a first side 101 and a second side 102 that are provided opposite to each other, and a third side 103 and a fourth side 104 that connect the first side 101 and the second side 102.

[0042] The three plastic barriers 3 include a first plastic barrier 31 vertically arranged on the third side 103, a second plastic barrier 32 located on the first side 101, and a third plastic barrier 33 located on the fourth side 104. The first plastic barrier 31, the second plastic barrier 32, and the third plastic barrier 33 are provided at intervals and integrally connected through a part of the metal circuit 1. Between every two adjacent plastic barriers 3, they are arranged at a certain angle. In the present invention, two adjacent plastic barriers 3 are arranged vertically to enclose a hollow adjustment space 51 for mounting the lens 1004 (of course, in a periscope type voice coil motor, the lens 1004 may be a prism) driven by the anti-shake magnetic element 1003 and the autofocus magnetic element 1003'. The coils 2 in the three plastic barriers 3 interact with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' respectively to adjust the position of the lens 1004, so that the driving requirements of the voice coil motor 1000 are met. The adjustment space 51 has a rectangular cross-section and is surrounded corresponding to the first side 101, the second side 102, the third side 103, and the fourth side 104. The adjustment space 51 is a columnar space that is not sealed in the vertical direction. Here, the adjustment space 51 is provided hollowly, that is, the base 5 is not arranged directly below the three plastic barriers 3. This is to make the adjustment space 51 of the lens 1004 large enough so that the vertical movement of the components in the adjustment space 51 is not restricted by the base 5 at the bottom. The base 5 has an open side where the three plastic barriers 3 are not provided, and an installation space 52 is formed, which makes it easy to secure a space for arranging other components in the horizontal plane and prevents the horizontal movement of other components from being restricted by the side base 5. Specifically, the base 5 forms the installation space 52 for mounting other members in the voice coil motor 1000, such as a photosensitive element, a camera with a lens, etc., by providing a third part 56 on the second side 102.The mounting space 52 here may select a non-hollow state to fit the structure of other members to be placed, and there is no need for direction adjustment either.

[0043] The base 5 includes a first portion 54 joined between the first plastic barrier 31 and the second plastic barrier 32, a second portion 55 joined between the second plastic barrier 32 and the third plastic barrier 33, and a third portion 56 joined between the first plastic barrier 31 and the third plastic barrier 33. The first portion 54, the second portion 55, and the third portion 56, together with these three plastic barriers 3, form by surrounding the mounting space 52. In this embodiment, the pedestal 100 has three plastic barriers 3 for placing three coils 2. In other embodiments, plastic barriers 3 may be provided on all four sides of the pedestal 100 to place more coils 2, or more sides may be provided on the pedestal 100 to perform lens driving in more directions, and more plastic barriers 3 may be correspondingly formed. The corresponding base 5 is provided with a portion connecting at least between adjacent plastic barriers 3 to achieve fixing and sealing of the metal circuit portion between adjacent plastic barriers 3.

[0044] In the present invention, the metal circuit 1 includes 12 branches 10, namely, a first branch 11, a second branch 12, a third branch 13, a fourth branch 14, a fifth branch 15, a sixth branch 16, a seventh branch 17, an eighth branch 18, a ninth branch 19, a tenth branch 110, an eleventh branch 111, and a twelfth branch 112, which are arranged in parallel at intervals. Each of the branches 10 includes the pins 1a arranged in parallel at intervals along the third side 103, the fillets 1b in a plane different from that of the pins 1a, and a connecting portion 1c connecting between the pins 1a and the fillets 1b. The pins 1a are located in a first plane P1, and the fillets 1b are located in a second plane P2. The pins 1a of each of the branches 10 are located in a horizontal plane perpendicular to the vertical plane, and the fillets 1b are located in the vertical plane. In the present invention, a portion of the connecting portion 1c is exposed between adjacent plastic barriers 3, and a bending portion 1d is provided at the exposed portion of the connecting portion 1c such that the three plastic barriers 3 are distributed in different vertical planes. Therefore, in the present invention, two bending portions 1d are formed at two locations between two adjacent ones of the three plastic barriers 3. Specifically, a first bending portion 1d1 is formed between the first plastic barrier 31 and the second plastic barrier 32, and a second bending portion 1d2 is formed between the second plastic barrier 32 and the third plastic barrier 33. Eight of the branches 10 are connected to the location where the first bending portion 1d1 is formed in the metal circuit 1, that is, here, the connecting portions 1c of the eight branches 10 are bent to form the first bending portion 1d1. Two of the branches 10 are connected to the location where the second bending portion 1d2 is formed in the metal circuit 1, that is, here, the connecting portions 1c of the two branches 10 are bent to form the second bending portion 1d2. In other embodiments, the number of the branches 10 may be adjusted and set according to the number of electrical elements 4 and coils 2 to be arranged. However, the number of the branches 10 to be bent with respect to the bending portion 1 changes depending on the position with respect to the pins 1a. Specifically, the farther the bending portion 1 is from the position of the pins 1a, the fewer the number of the branches 10.The first bending portion 1d1 and the second bending portion 1d2 are located outside the plastic barrier 3 and inside the base 5. The first bending portion 1d1 and the second bending portion 1d2 are respectively embedded in the first connecting post portion 531 and the second connecting post portion 532. Every two adjacent plastic barriers 3 are integrally connected via the first connecting post portion 531 and the second connecting post portion 532 and are formed by planar transfer molding.

[0045] In the present invention, the pin 1a and the fillet 1b of each branch 10 are located in different planes. The first plastic barrier 31 includes a vertically arranged vertical portion 311 and a bending extension portion 312 arranged perpendicular to the vertical portion 311, that is, horizontally arranged. The pin 1a protrudes from the bending extension portion 312 to form a bending portion 1e at the position of the bending extension portion 312. The pin 1a is located in the first plane P1, and the fillet 1b is located on the vertical portion 311 of the first plastic barrier 31, the second plastic barrier 32, and the third plastic barrier 33. Since none of the vertical portion 311, the second plastic barrier 32, and the third plastic barrier 33 are flush with the bending extension portion 312, the pin 1a of each branch 10 is located in a plane different from that of the fillet 1b. In the present invention, the pin 1a is located outside any of the three plastic barriers 3. Specifically, the pin 1a is located outside the first plastic barrier 31 or outside the third plastic barrier 33.

[0046] The plastic barrier 3 has the electric element 4 welded and held to the fillet 1b. The plastic barrier 3 is provided with a welding concave groove (not numbered) for accommodating the electric element 4 corresponding to the branch 1b so that the electric element 4 is welded to the metal circuit 1. The electric element 4 is a hole element.

[0047] In the present invention, the coil 2 and the electrical element 4 are both located on a first plastic barrier 31, a second plastic barrier 32, and a third plastic barrier 33 in a vertical plane. The first plastic barrier 31, the second plastic barrier 32, and the third plastic barrier 33 have an inner surface close to the base 5 and an outer surface far from the base 5. The coil 2 and the electrical element 4 are located on at least one of the inner surface and the outer surface, that is, the coil 2 may be located on the inner surface or the outer surface, or a plurality of the coils 2 located on both the inner surface and the outer surface may be provided. The arrangement of the electrical element 4 is the same.

[0048] Referring to FIGS. 7 and 8, in the first embodiment of the present invention, the method of holding the coil 2 on the plastic barrier 3 can be selected from winding the coil 2 around the plastic barrier 3 and mounting a chip-type coil by the SMT (Surface Mount Technology) method. In the present embodiment, the coil 2 is mounted on the plastic barrier 3 by the SMT (Surface Mount Technology) method and is electrically connected to the metal circuit 1. The pedestal 100 further includes an adhesive sheet 6 located outside the coil 2 to hold the coil 2 so as not to drop. Referring to FIG. 9, the coil 2 is a wound coil 2' and a chip-type coil 2. Specifically, the wound coil 2' is provided on the first plastic barrier 31 and the third plastic barrier 33, and the chip-type coil 2 is provided on the second plastic barrier 32. A pair of bobbins 34 are provided on both the first plastic barrier 31 and the third plastic barrier 33, and the wound coil 2' is held by being wound around the pair of bobbins 34. The wound coil 2 further has lead terminals (not shown) welded to a part of the metal circuit 1 exposed on the plastic barrier 3. In other embodiments, the wound coil 2' and the chip-type coil 2 can be selected as needed and are not limited here.

[0049] Furthermore, the present invention relates to a manufacturing method for manufacturing a pedestal 100 with a coil, and specifically includes the following steps.

[0050] On a single material belt, a plurality of independent metal circuits 1 are formed at intervals. The metal circuit 1 includes a plurality of branches 10 composed of pins 1a arranged in parallel at intervals, a fillet 1b provided opposite to the pins 1a, and a connecting portion 1c connecting the pins 1a and the fillet 1b.

[0051] Three plastic barriers 3, namely a first plastic barrier 31, a second plastic barrier 32, and a third plastic barrier 33, are injection-molded at intervals on the metal circuit 1, and a part of the connecting portion 1c is exposed between two adjacent plastic barriers 3, that is, a part of the connecting portion 1c is exposed between the first plastic barrier 31 and the second plastic barrier 32 and between the second plastic barrier 32 and the third plastic barrier 33.

[0052] An electrical element 4 and a coil 2 electrically connected to the metal circuit 1 are provided on each of the plastic barriers 3. The coil 2 is electrically connected to the fillet 1b of the metal circuit by welding after winding or mounting by SMT, and the electrical element 4 is welded to the fillet 1b of the metal circuit 1 by reflow soldering.

[0053] The connecting portion 1c is bent perpendicularly to the extending direction of the branch 10 of the metal circuit 1 so that the three plastic barriers 3 are located in different vertical planes. The three different vertical planes are all perpendicular to the same plane. At this time, eight branches 10 are bent between the first plastic barrier 31 and the second plastic barrier 32 to form a first bending portion 1d1, and two branches 10 are bent between the second plastic barrier 32 and the third plastic barrier 33 to form a second bending portion 1d2.

[0054] Bend the pin 1a located outside the first plastic barrier 31 so that the pin 1a and the fillet 1b are located in different planes. This process may be completed when the plastic barrier 3 has not been injection-molded. That is, when forming the metal circuit 1, the pin 1a may be bent without limitation here.

[0055] Secondary injection-mold a base 5 that connects the three plastic barriers 3 to the first bending portion 1d1 and the second bending portion 1d2 to integrally connect two adjacent plastic barriers 3 and form a first semi-finished product of the pedestal 100 through planar transfer molding.

[0056] Cut the material belt corresponding to the first semi-finished product to form a plurality of independent and complete pedestals 100.

[0057] In the present invention, by two injection moldings, the coil 2 and the electrical element 4 are installed on three plastic barriers 3 in the same plane. Next, the metal circuit 1 connecting the three plastic barriers 3 is bent so that the three plastic barriers 3 are located in different planes and vertically arranged. Furthermore, a base 5 connecting the three plastic barriers 3 is formed by secondary injection molding to form a pedestal 100 with a three-dimensional structure. This eliminates the need to mount the flexible printed circuit (FPC) and the flexible coil in a vertical plane or in a sealed mounting space, realizing a reduction in assembly cost and an improvement in yield. At the same time, the technical problem of inability to vertically mount the coil or electronic products is solved, which helps to improve the design freedom of the voice coil motor. Also, since both the coil 2 and the electrical element 4 are integrated on the plastic barrier 3, the structure of the product becomes more compact and miniaturized. In addition, since the pedestal 100 is injection-molded with three plastic barriers on the same plane, a plurality of pedestals 100 can be manufactured on one material belt, enabling mass production and automation. The manufacturing method of the voice coil motor 1000 includes the manufacturing method of the pedestal 100 and has the same effects.

[0058] In other embodiments, both the magnetic element 1003 and the magnetic element 1003' may be anti-shake magnetic elements, whereby anti-shake of driving in different directions is achieved by the drive coil 2 integrated in the pedestal 100, or both may be autofocus magnetic elements, whereby driving with stronger power is realized by the drive coil 2 integrated in the pedestal 100.

[0059] Finally, the above embodiments are only for explaining the technical solutions of the present invention and do not limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or equivalently replace some or all of their technical features. It should be understood that these modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

[0060] What has been described above is only some embodiments of the present invention, not all embodiments. Any equivalent changes made by those skilled in the art to the technical solutions of the present invention by reading the specification of the present invention are all included in the scope of the claims of the present invention.

Claims

1. A pedestal (100) comprising: at least two plastic barriers (3) located in a vertical plane and arranged at intervals along a continuous locus; pins (1a) embedded in at least two of the plastic barriers (3), exposed outside the plastic barriers (3) and arranged at parallel intervals; fillets (1b) exposed on the side surfaces of the plastic barriers (3); and a metal circuit (1) including a plurality of branches (10) composed of a connecting portion (1c) connecting the pins (1a) and the fillets (1b); and a coil (2) electrically connected to the metal circuit (1), wherein the at least two plastic barriers (3) are formed by primary injection molding, the coil (2) is welded to the fillet (1b), a part of the connecting portion (1c) is exposed between two adjacent plastic barriers (3), the connecting portion (1c) is bent so that the at least two plastic barriers (3) are located in different planes to form a bent portion (1d), and at least one connecting post portion connecting between two adjacent plastic barriers (3) is formed by secondary injection molding outside the bent portion (1d).

2. The pedestal (100) according to claim 1, further comprising a base (5) for positioning and connecting at least two of the plastic barriers (3).

3. The pedestal (100) according to claim 2, wherein the base (5) is provided integrally with the connecting post portion or separately.

4. The pedestal (100) according to claim 3, wherein the base (5) surrounds an adjustment space (51) together with the plastic barrier (3) and the connecting post portion.

5. The pedestal (100) according to claim 4, wherein the adjustment space (51) is a columnar space that is not sealed in the vertical direction.

6. The pedestal (100) according to claim 5, having four sides, with three plastic barriers (3) respectively arranged on three of the sides to form a U shape, and the remaining side of the four sides being open.

7. The pedestal (100) according to claim 6, wherein the base (5) has a mounting space (52) formed on the remaining side where the three plastic barriers (3) are not provided.

8. The pedestal (100) according to claim 7, wherein each two adjacent plastic barriers (3) are integrally connected via the connecting post portion and are formed by planar transfer molding.

9. The pedestal (100) according to claim 8, wherein a certain angle is formed between each two adjacent plastic barriers (3).

10. The pedestal (100) according to claim 1, wherein an electrical element (4) welded to the fillet (1b) is provided on the plastic barrier (3).

11. The pedestal (100) according to claim 10, wherein the electrical element (4) is a drive integrated circuit element including a Hall element or a Hall sensor.

12. The pedestal (100) according to claim 1, wherein the pins (1a) of each branch (10) are located in a horizontal plane perpendicular to the vertical plane, and the fillet (1b) is located in the vertical plane.

13. The pedestal (100) according to claim 1, wherein the pins (1a) are located outside any one of the plastic barriers (3).

14. A voice coil motor (1000) comprising the pedestal (100) according to any one of claims 1 to 13.

15. The voice coil motor (1000) according to claim 14, wherein the voice coil motor (1000) is a periscope type voice coil motor, and includes a reflecting element provided in an adjustment space (51) formed by being surrounded by the base (5), the plastic barrier (3), and the connecting post portion, and the reflecting element is a mirror or a prism.

16. A voice coil motor having an anti-shake function, comprising an external casing (1001), a mounting casing (1002), an anti-shake magnetic element (1003) mounted on the mounting casing (1002), an autofocus magnetic element (1003'), a lens (1004), a holder (1005) for mounting the lens (1004), and a movable module, and the pedestal (100) according to any one of claims 1 to 13.

17. A first step of forming a plurality of independent metal circuits (1) including a plurality of branches (10) each consisting of pins (1a) arranged in parallel at intervals on a material belt, a fillet (1b) provided opposite to the pins (1a), and a connecting portion (1c) connecting the pins (1a) and the fillet (1b); A second step of injection molding at least two plastic barriers (3) arranged at intervals along a continuous locus and located in a vertical plane on the metal circuit (1), and exposing a part of the connecting portion (1c) between two adjacent plastic barriers (3); A third step of welding a coil (2) to the plastic barrier (3); A fourth step of bending the connecting portion (1c) so that at least two of the plastic barriers (3) are located in different vertical planes to form a bent portion (1d); A fifth step of secondarily injection molding a connecting post portion connecting two adjacent plastic barriers (3) on the bent portion (1d) to form a first semi-finished product; A sixth step of cutting the material belt corresponding to the first semi-finished product to form a plurality of independent complete pedestals (100); A manufacturing method for manufacturing the pedestal (100) according to any one of claims 1 to 13, characterized by including the above steps.

18. The manufacturing method further includes a seventh step of bending the pins (1a) so that the pins and the fillet (1b) are located in different planes between the first step and the second step. The number of plastic barriers (3) in the second step is three, and the fifth step further includes secondarily injection molding a base (5) connecting the three plastic barriers (3). The manufacturing method for manufacturing the pedestal according to claim 17 is characterized by the above.

19. A manufacturing method for a voice coil motor, characterized by including the manufacturing method for manufacturing the pedestal according to claim 17.

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