Base with coil, periscope-type voice coil motor, and method for manufacturing the same.

Abstract

To provide a pedestal with a coil, a periscope type voice coil motor and a manufacturing method thereof which can skillfully realize integrated fitting and electric connection with a metallic circuit in a pedestal of the coil to improve a degree of freedom of design of the periscope type voice coil motor.SOLUTION: A pedestal comprises: an insulation base (2) to which primary injection molding is performed; a metallic circuit (1) fitted into the insulation base; a coil electrically connected with the metallic circuit; and an insulation frame (3) subjected to secondary injection molding, and over-molded to the insulation base and the metallic circuit. The metallic circuit includes a plurality of branches, wherein at least a part of the branches includes: a pin fixed to the insulation frame to be exposed; and a welding part fixed to the insulation base to be exposed. The coil is connected with and fixed to the welding part to be electrically connected with the branches.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with an application date of April 7, 2021 and an application number of 202110372672.5, and all of its contents are incorporated herein by reference.

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

Background Art

[0003] Conventional pedestals with coils and voice coil motors usually 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 interacts with the coil. Generally, the assembler of the voice coil motor needs to electrically assemble the above basic components. However, it is usually 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 board (FPC) that needs to integrate an IC or a coil, it is necessary to reserve at least a part of the mounting space and design an assembly space for integrating the IC and the coil on the FPC. Conventional pedestals with coils and periscope-type voice coil motors usually use the FPC surface assembly process to achieve the line communication function. However, in the assembly process, there are limitations that high requirements are placed on the accuracy of the form and position tolerances of the members themselves, the repeated positioning accuracy, etc. Therefore, the current overall defect rate in this assembly is high and the mass productivity is not good.

[0004] Specifically, for example, there is a voice coil motor that typically uses a surface assembly process for flexible printed circuit boards (FPCs) to arrange coils on the flexible circuit board and weld them to a metal circuit in a base to achieve circuit connectivity. For example, utility model patent No. CN209134273U discloses a connection structure applicable to a voice coil motor including an injection-molded article and a flexible circuit board (FPC). The injection-molded article has a plurality of side walls sequentially connected in the circumferential direction to form a hollow cavity, a positioning cavity opening in one of the side walls that penetrates the hollow cavity, the flexible circuit board FPC is attached to the side wall having the positioning cavity, and ICs and coils are mounted or wound onto the FPC to achieve circuit conductivity.

[0005] Furthermore, as described in the invention patent application with publication number CN108989511A, in a base and voice coil motor having electrical elements, the electrical elements are integrated on a vertical plastic surface, and the subsequently mounted coils are also mounted on a vertical plastic surface, requiring subsequent mounting using surface mount technology (SMT). Moreover, SMT mounting requires the mounting surface to be open, making coil winding and mounting relatively difficult, and the requirements for coil position design are very high. For this reason, integrating electrical elements (ICs: Integrated Circuits) and coils on a vertical surface is difficult to automate, requires cumbersome manual operation, reduces efficiency, and compromises quality stability. On the other hand, even if ICs and coils are integrated on a base located on a horizontal plane, only one assembly can be performed at a time, resulting in very low automation efficiency for assembly. Currently, all commercially available SMT mounting equipment processes the base individually, not in batches. In the case of a periscope-type voice coil motor, the coils and electrical elements are mounted in the horizontal plane, but there are four support pillars on the periphery of the insulating base, and it is difficult to assemble the coils and electrical elements in the space inside these four pillars, making automation difficult.

[0006] The above problems primarily occur when conventional voice coil motor manufacturers produce voice coil motors. In this case, components must be outsourced and then positioned and assembled onto elements such as flexible circuit boards / domes. However, the positioning, processing, and assembly processes are complex, the operating space is limited, component defects are common, and overall costs become excessive. Furthermore, when producing these outsourced components, the combination of components is not considered, and the problem of combination space design is ignored. As a result, some mounting points must be left as spares when designing the voice coil motor, resulting in wasted space and preventing the product structure from becoming compact and miniaturized. In addition, existing coils generally need to be integrated with the metal circuit in the base by integrating them onto a separate FPC (flexible printed circuit). However, FPCs themselves are thin, brittle, and quite expensive, making it difficult to wind coils onto them or mount them, leading to defects. Moreover, the number of turns that can be wound and the thickness of the coil are affected by the thickness of the FPC, which in turn affects the magnitude of the coil current and increases circuit losses. In addition, when coils are wound or mounted on an independent FPC (Flexible Printed Circuit), the FPC is flexible, and if the electronic device is dropped, the voice coil motor with coils fixed to the FPC is prone to failure as a whole due to its weak integration strength.

[0007] Therefore, in order to overcome the above-mentioned shortcomings, there is certainly a need to provide new coil-mounted bases and voice coil motors, as well as methods for manufacturing them. [Overview of the project]

[0008] The object of the present invention is to provide a base with a coil, a periscope-type voice coil motor, and a method for manufacturing the same.

[0009] The object of the present invention is achieved by the following technical solution 1, namely a coil-mounted base used in a voice coil motor. The base includes a metal circuit, an insulating base overmolded onto the metal circuit by primary injection molding, an insulating frame overmolded onto the insulating base and the metal circuit by secondary injection molding, and a coil electrically connected to the metal circuit. The metal circuit has a plurality of branches, at least some of which include pins and welded portions. The welded portions are fixed to and exposed on the insulating base. The pins are fixed to and exposed on the insulating frame. The coil is connected to and fixed to the corresponding welded portions so as to be electrically connected to the corresponding branches.

[0010] The object of the present invention is achieved by the following technical solution 2, namely a periscope-type voice coil motor equipped with the above-described coil-equipped base.

[0011] The object of the present invention is the following technical solution 3, namely a method for manufacturing a coil-equipped base used in a voice coil motor as described above, Multiple sequentially continuous metal circuits are press-formed on a material belt, and the metal circuits have multiple branches, and at least some of the branches include a first step including pins and welded parts. A second step involves performing primary injection molding on the metal circuit to form an insulating base, and fixing and exposing the welded portion to the insulating base. A third step involves electrically connecting and fixing the coil to the corresponding welded area so that it is electrically connected to the corresponding branch. A fourth step involves performing secondary injection molding around the metal circuit and the insulating base to form an insulating frame that covers at least a portion of the insulating base and the metal circuit, and fixing and exposing the pins to the insulating frame. The process includes a fifth step of cutting a material belt connecting multiple metal circuits to form multiple independent, complete bases.

[0012] The object of the present invention is achieved by the following technical solution 4, namely, a method for manufacturing a periscope-type voice coil motor, which includes the steps of a manufacturing method for manufacturing a coil-equipped base as described above.

[0013] According to the coil-equipped base of the present invention, the insulating base and insulating frame are formed by two injection molding processes, enabling not only the fitting and fixing of the metal circuit but also the smooth completion of the electrical connection between the coil and the metal circuit and the integrated mounting on the base. This improves the design flexibility of the periscope-type voice coil motor, reduces assembly costs, and improves yield. At the same time, according to the present invention, the coil can be directly integrated into the base during the manufacturing process, making the product structure even more compact and smaller. The flexible circuit board with the coil attached will not be too soft and fail when the electronic device is dropped. Furthermore, during the manufacturing process, multiple bases can be connected to a single material belt via a metal circuit, enabling mass production and automation. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic perspective view of the periscope-type voice coil motor of the present invention. [Figure 2] This is a schematic perspective view of the base of the present invention, which has a chip-type flexible circuit coil attached. [Figure 3] This is a schematic perspective view of the base of the present invention, which is fitted with a wound coil. [Figure 4] Figure 3 is an exploded perspective view of the base. [Figure 5] Figure 4 is a further exploded perspective view. [Figure 6] Figure 5 is a partially enlarged view of the coil and insulating base. [Figure 7] This is a schematic perspective view of the metal circuit in the base before it is bent. [Figure 8] Figure 7 is a schematic perspective view of a metal circuit in which an insulating base has been primary injection molded. [Figure 9] This is a schematic perspective view of the upper and lower layers of a metal circuit. [Explanation of Symbols]

[0015] Periscope-type voice coil motor 1000, photosensitive assembly 1001, optical lens 1002, reflector element 1003, base 100, metal circuit 1, pin 1a, fillet 1b, connector 1c, upper metal circuit 1d, lower metal circuit 1e, bent part 1f, welded part 1g, horizontal branch 10, first branch 11, first pin 11a, first fillet 11b, first connector 11c, first bent part 11f, second branch 12, second pin 12a, second fillet 12b, second connector 12c, third branch 13, third Pin 13a, third fillet 13b, third connector 13c, fourth branch 14, fourth pin 14a, fourth fillet 14b, fourth connector 14c, fifth branch 15, fifth pin 15a, fifth fillet 15b, fifth connector 15c, fifth bend 15f, sixth branch 16, sixth pin 16a, sixth fillet 16b, sixth connector 16c, seventh branch 17, seventh pin 17a, seventh fillet 17b, seventh connector 17c, eighth branch 18, eighth pin 18a, eighth fillet 18b, 8th connection part 18c, 8th bend part 18f, column branch 19, column pin 19a, column fillet 19b, column connection part 19c, vertical column part 19d, 1st column branch 191, 1st column pin 191a, 1st column fillet 191b, 1st column connection part 191c, 1st vertical column part 191d, 2nd column branch 192, 2nd column pin 192a, 2nd column connection part 192c, 2nd vertical column part 192d, 3rd column branch 193, 3rd column pin 193a, 3rd column fillet 193b, 3rd column connection part 193c, 3rd vertical The following will be explained with reference to the reference numerals for the column portion 193d, the bent portion 194, the insulating base 2, the top surface 20, the first side edge 21, the second side edge 22, the third side edge 23, the fourth side edge 24, the welding groove 25, the bobbin 26, the positioning column 27, the welding groove 28, the outer peripheral side surface 29, the insulating frame 3, the frame body portion 30, the vertical portion 31, the first vertical portion 311, the second vertical portion 312, the third vertical portion 313, the fourth vertical portion 314, the top surface 32, the thin-walled portion 33, the coil 4, the flexible circuit coil 4', the welding pin 41, the lead terminal 42, the electrical element 5, and the first plane P1.

[0016] The present invention will be described in more detail with reference to the above drawings according to the following embodiments of the invention.

Embodiments for Carrying out the Invention

[0017] In the description of the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships 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.

[0018] In addition, in the description of the present invention, unless there are particularly clear regulations and limitations, 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.

[0019] For a periscope type voice coil motor according to the prior art, subsequent integration with a coil is required. Generally, a flexible printed circuit board (FPC) on which the coil is mounted or integrated is separately installed, and then the position of the flexible printed circuit board with respect to the pedestal is repositioned to assemble a complete voice coil motor. The pedestal integrated with the coil according to the present invention does not require separately installing a flexible printed circuit board that serves as a relay connection and positioning role, and performs integration by winding simultaneously with the injection molding of the pedestal, thus omitting the subsequent assembly work of the assembly manufacturer and the installation space for components. Also, in the prior art, when it is necessary to wind and mount a subsequent coil on the upper surface of the formed pedestal, it is restricted by the limited winding space and operation space inside the pedestal, which is disadvantageous for the assembly and integration of the pedestal and the coil. Specifically, when integrating the coil and electrical elements in the horizontal plane of the pedestal, there are vertical portions around the perimeter of the pedestal, and it is necessary to wind or mount the coil or electrical element in the insulating base between the vertical portions. The operation space is limited, positioning and integration are very difficult, and processing and integration are only performed on 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.

[0020] In the present invention, first, primary injection molding is performed on the horizontal plane where the metal circuit 1 is located to form the insulating base 2. Next, the electric element 5 and the coil 4 are electrically assembled or mounted on the insulating base 2. Then, the vertical portion (vertical column portion 19d) of the metal circuit 1 outside the insulating base 2 is bent, and secondary injection molding is performed on the outer peripheral side surface 29 of the insulating base 2 to form the insulating frame 3, thereby insert molding the vertical portion (vertical column portion 19d) into the insulating frame 3. In the present invention, for the electric element 5 and the coil 4, the electric welding between the electric element 5, the coil 4 and the metal circuit 1 has already been completed before the vertical portion of the insulating frame 3 is molded, and it is not necessary to adopt the recombination of the flexible printed circuit board (FPC) and the coil with the pedestal where the injection molding has been completed. The assembly cost is reduced, and the yield is improved. Moreover, the electrical mounting is advantageous even when applied to the case where the space perpendicular to the mounting surface is vertically open. However, when there are two mounting surfaces spaced apart and parallel in the vertical direction, it is not advantageous for the electrical assembly by mounting, and only manual operation has to be adopted. From this point, the technical problem that it is difficult to mount the electric element 5 and the wound air-core coil 4 on top of the vertical portion 31 is also solved, which helps to improve the degree of freedom in the internal space design of the periscope type voice coil motor 1000, and the internal structure of the periscope type voice coil motor product is also more compact and miniaturized. Hereinafter, with reference to FIGS. 1 to 9, the pedestal 100 of the present invention, the periscope type voice coil motor 1000 including the pedestal 100, and their manufacturing methods will be described.

[0021] In the present invention, the base 100 and the periscope-type voice coil motor 1000 can be applied to a periscope-type camera module in a mobile phone. Due to the thickness limitations of mobile phones, a conventional vertical orientation (i.e., facing outward on the surface of the mobile phone) is adopted. However, because the focal length of the camera in a mobile phone is small, the optical zoom capability is limited. In contrast, in the present invention, unlike the vertical orientation of conventional lenses, the periscope-type voice coil motor 1000 is horizontally positioned inside the mobile phone, as shown in Figure 1. The periscope-type voice coil motor 1000 comprises a photosensitive assembly 1001, an optical lens 1002, a magnetic element (not shown) held by the optical lens 1002, a reflective element 1003, a base 100 on which a coil 4 that interacts with the magnetic element is integrated, and a lens holder (not shown) whose movement is controlled by the metal circuit 1, the coil 4, and the magnetic element. Here, the optical lens 1002 is positioned between the photosensitive assembly 1001 and the reflecting element 1003. As a result, ambient light is first reflected by the reflecting element 1003, changing the propagation direction of the ambient light so that light incident perpendicular to the mobile phone camera is changed to light in the lateral direction. After passing through the optical lens 1002, the light is received by the photosensitive assembly 1001, and an image is acquired. The reflecting element 1003 may be a prism or a lens, and is not specifically limited. The metal circuit 1 can assist in focusing the optical lens 1002 by interacting with the magnetic element after power is applied and moving the lens holder. A detailed explanation follows below.

[0022] In conventional voice coil motors, an air-core coil wound on a flexible circuit board is provided on one side of the base 100 on which the optical lens 1002 is mounted, and further interacts with a magnetic element to adjust the optical lens. In the present invention, the coil 4 is integrated on the base 100. The magnetic element in the present invention may interact with the coil 4 to realize movement in the horizontal plane (in the X-axis or Y-axis direction) or vertical direction (in the Z-axis direction), and is not limited thereto. The form of the coil may be a wound-type hollow coil 4 or a chip-type flexible circuit coil (FP Coil) 4', and the present invention does not limit the specific form of the coil, but the most preferred form of the present invention employs a wound-type or chip-type flexible circuit coil. Figure 2 shows a chip-type flexible circuit coil 4', and Figure 3 shows a wound-type coil 4.

[0023] Referring to Figures 1 to 9, the base 100 comprises a rectangular insulating base 2, a metal circuit 1 insert-molded into the insulating base 2, an electrical element 5 and a coil 4 (flexible circuit coil 4') electrically connected to the metal circuit 1, and an insulating frame 3 insert-molded outside the insulating base 2. The insulating base 2 is horizontally positioned and has an outer peripheral side surface 29 and a top surface 20 provided on its outer circumference. The insulating frame 3 is located outside the outer peripheral side surface 29 of the insulating base 2. The insulating base 2 is located on a first plane P1. The insulating base 2 is overmolded onto the metal circuit 1 by primary injection molding, the coil 4 is provided on the upper surface 20 of the insulating base 2, and the base 100 includes an insulating frame 3 that covers the insulating base 2 and the metal circuit 1 by secondary injection molding, the insulating frame 3 includes a frame body portion 30 that completely seals and covers the outer peripheral side surface 29 of the insulating base 2 and is arranged horizontally, and vertical portions 31 that extend vertically from the four sides of the upper surface of the frame body portion 30. The insulating base 2 and the insulating frame 3 are integrally connected by secondary injection molding. The metal circuit 1 is insert-molded into the insulating base 2 by primary injection molding. In the present invention, the first plane P1 is a horizontal plane.

[0024] Referring to Figure 5, the insulating base 2 is provided in a rectangular shape with a first side 21 and a third side 23 facing each other, and a second side 22 and a fourth side 24 connecting the first side 21 and the third side 23. The insulating base 2 has an outer peripheral side surface 29 provided on its outer circumference and a surface exposed to the outside of the insulating frame 3. In the present invention, the outer peripheral side surface 29 is the side surface corresponding to the first side 21, the second side 22, the third side 23 and the fourth side 24, and in other embodiments, the outer peripheral side surface 29 is the side surface that contacts the insulating frame 3. In the present invention, the surface is the upper surface 20 of the insulating base 2, but in other embodiments, the surface may be another surface exposed to the insulating frame 3. The coil 4 is positioned on the insulating base 2 and fixed to the insulating base 2 by winding. In the present invention, the base 100 is provided with two coils 4 for interacting with the magnetic element to achieve autofocus, the two coils 4 are provided close to the first side 21 and the second side 22, respectively, and the longitudinal directions of the two coils 4 are orthogonal to each other. The insulating base 2 comprises a pair of bobbins 26 provided spaced apart in the extending direction of the first side 21 and the second side 22, a pair of positioning pillars 27 located inside the pair of bobbins 26, and welding grooves 28 located between each bobbin 26 and the corresponding positioning pillar 27 on the same side. The insulating base 2 is further provided with a plurality of welding grooves 25 for exposing the fillet 1b of the metal circuit 1 and enabling welding with the electrical element 5. In the present invention, the base 100 has three of the electrical elements 5.

[0025] The insulating frame 3 is injection-molded to be integrally connected to the insulating base 2. The insulating frame 3 includes a horizontally positioned frame portion 30, a vertical portion 31 positioned perpendicular to the first plane P1 and extending vertically from the four sides of the upper surface of the frame portion 30, and a top surface 32 located on the surface of the vertical portion 31. The insulating frame 3 is formed to be completely sealed and cover, and has a thin-walled portion 33. The thin-walled portion 33 is formed on one side of the frame portion 30, and in this invention, the thin-walled portion 33 is provided corresponding to the first side edge 21. The pin 1a, which will be described later, is exposed on the surface of the thin-walled portion 33. Because the insulating frame 3 is formed to be completely sealed and cover, the structural strength of the base 100 after injection molding is better. Also, because the thin-walled portion 33 is thinned, it becomes easier to attach to an external circuit board (not shown), and the thickness space after mounting does not increase. The vertical portion 31 includes a first vertical portion 311 provided at the intersection of the first side 21 and the second side 22, a second vertical portion 312 provided at the intersection of the first side 21 and the fourth side 24, a third vertical portion 313 provided at the intersection of the fourth side 24 and the third side 23, and a fourth vertical portion 314 provided at the intersection of the second side 22 and the third side 23.

[0026] Referring to Figure 9, the metal circuit 1 is a metal circuit having two layers, an upper metal circuit 1d and a lower metal circuit 1e, along a first direction. In the present invention, the first direction is a vertical direction perpendicular to the first plane P1. In other embodiments, it may be another direction. The metal circuit 1 includes a horizontal portion insert-molded within the insulating base 2 and a vertical portion insert-molded within the insulating frame 3, the horizontal portion and the vertical portion being bent to form a bent portion 194, and the bent portion 194 is housed within the insulating frame 3. The vertical portion of the metal circuit 1 is insert-molded within the insulating frame 3.

[0027] The metal circuit 1 includes a plurality of horizontal branches 10 located on the first plane P1, and a plurality of branches consisting of at least two columnar branches 19 located on the circumferential side of the plurality of horizontal branches 10. One end of each of the plurality of horizontal branches 10 is formed as pins 1a exposed outside the insulating base 2, arranged in parallel and spaced apart, and the other end of each horizontal branch 10 is formed as fillets 1b electrically connected to the pins of the electrical element 5, with a connection portion 1c formed between the fillet 1b and the pins 1a of each horizontal branch 10. The horizontal branches 10 include 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, and an eighth branch 18, arranged from right to left. The first branch 11, the fifth branch 15, and the eighth branch 18 constitute the upper metal circuit 1d located in the upper layer, and the second branch 12, the third branch 13, the fourth branch 14, the sixth branch 16, the seventh branch 17, and the column branch 19 constitute the lower metal circuit 1e located in the lower layer. Between the fillet 1b and the connection portion 1c of the upper metal circuit 1d, a bent portion 1f is provided so that the fillet 1b of the upper metal circuit 1d and the fillet 1b of the lower metal circuit 1e are located on the same plane and welded to the same electrical element 5. In the present invention, the horizontal branch 10 forms a part of the horizontal portion of the metal circuit 1.

[0028] In the present invention, the base 100 has three column branches 19. Each column branch 19 includes a horizontal portion and a vertical portion, the vertical portion of the column branch 19 being distributed around the outer circumference of one side of the insulating base 2, and the electrical element 5 and coil 4 being provided in the horizontal portion between the vertical portions of at least two of the column branches 19. Specifically, one end of the column branch 19 is provided with a column pin 19a exposed on the top surface 32 of the insulating frame 3, and the other end is arranged and formed as a column fillet 19b welded to the electrical element 5, and a column connection portion 19c having the vertical column portion 19d located on the circumferential side of the horizontal branch 10 is formed between the column pin 19a and the column fillet 19b. The vertical column portion 19d is perpendicular to the first plane P1, located outside the insulating base 2 and inside the insulating frame 3, and the connection point between the vertical column portion 19d and the column connection portion 19c on the first plane P1 is bent to form the bent portion 194. The column branch 19 includes a first column branch 191 provided at the intersection of the first side 21 and the second side 22, a second column branch 192 provided on the fourth side 24, and a third column branch 193 provided at the intersection of the second side 22 and the third side 23. In this case, the vertical column portion 19d is located outside the insulating base 2 and inside the vertical portion 31 of the insulating frame 3.

[0029] Specifically, the horizontal portion of the metal circuit 1 consists of the horizontal branch 10, the column fillet 19b of the column branch 19, and a part of the column connection portion 19c located within the first plane P1, while the vertical portion of the metal circuit 1 consists of the vertical column portion 19d and the column pin 19a of the column branch 19. The horizontal portion is insert-molded into the insulating base 2, the vertical portion is insert-molded into the insulating frame 3, and the bent portion 194 between the vertical portion and the horizontal portion is located outside the insulating base 2 and insert-molded inside the insulating frame 3.

[0030] The column branch 19 is included in either the upper metal circuit 1d or the lower metal circuit 1e. In the present invention, the column branch 19 is a part of the lower metal circuit 1e. However, in other embodiments, the column branch 19 may be a part of the upper metal circuit 1d, or it may consist of both a part of the upper metal circuit 1d and a part of the lower metal circuit 1e.

[0031] The first branch 11 includes two first pins 11a located on the first side 21 and the fourth side 24 of the insulating base 2, a first fillet 11b welded to the electrical element 5, a first connection portion 11c connecting the first fillet 11b and the first pins 11a, and a first bent portion 11f located inside the first fillet 11b and connected to the first connection portion 11c.

[0032] The second branch 12 includes a second pin 12a located on the first side 21, a second fillet 12b welded to the same electrical element 5 as the first fillet 11b and located in the same plane as the first fillet 11b, and a second connecting portion 12c connecting the second pin 12a and the second fillet 12b. The first fillet 11b is arranged in two rows different from the second fillet 12b, but is commonly welded to the same electrical element 5.

[0033] The third branch 13 includes a third pin 13a located on the first side 21, a third fillet 13b welded to the same electrical element 5 as the first fillet 11b and located in the same plane as the first fillet 11b, and a third connector 13c connected between the third pin 13a and the third fillet 13b. The third fillet 13b is located to the right of the second fillet 12b in the same row and is provided opposite the first fillet 11b.

[0034] The fourth branch 14 includes a fourth pin 14a located on the first side 21, a fourth fillet 14b welded to the same electrical element 5 as the first fillet 11b and located in the same plane as the first fillet 11b, and a fourth connector 14c connected between the fourth pin 14a and the fourth fillet 14b. The fourth fillet 14b is located to the left of the first fillet 11b in the same row and is provided opposite the second fillet 12b.

[0035] Each of the electrical elements 5 has four pins welded to the first fillet 11b, the second fillet 12b, the third fillet 13b, and the fourth fillet 14b, respectively. The first bent portion 11f is formed such that the first fillet 11b and the second fillet 12b, the third fillet 13b, and the fourth fillet 14b are located on the same plane.

[0036] The fifth branch 15 includes two fifth pins 15a located on the first side 21 and the fourth side 24 of the insulating base 2, a fifth fillet 15b welded to an electrical element 5 different from the first fillet 11b, a fifth connection portion 15c connected between the fifth fillet 15b and the fifth pins 15a, and a fifth bent portion 15f located inside the fifth fillet 15b and connected to the fifth connection portion 15c.

[0037] The sixth branch 16 includes two sixth pins 16a located on the first side 21 and the third side 23 of the insulating base 2, a sixth fillet 16b welded to the same electrical element 5 as the fifth fillet 15b, and a sixth connector 16c connected between the sixth fillet 16b and the sixth pins 16a. The sixth fillet 16b is provided opposite the fifth fillet 15b.

[0038] The seventh branch 17 includes a seventh pin 17a located on the first side 21 of the insulating base 2, a seventh fillet 17b located to the right of the fifth fillet 15b and welded to the same electrical element 5 as the fifth fillet 15b, another seventh fillet 17b welded to another electrical element 5 different from the electrical element 5 welded to either the first fillet 11b or the fifth fillet 15b, and a seventh connector 17c connecting the seventh fillet 17b and the seventh pin 17a.

[0039] The eighth branch 18 includes a total of five eighth pins 18a, one located on the first side 21 of the insulating base 2, two located on the second side 22, one located on the third side 23, and one located on the fourth side 24; an eighth fillet 18b located opposite the seventh fillet 17b and welded to the same electrical element 5 as the fifth fillet 15b; another eighth fillet 18b welded to the same electrical element 5 as the other seventh fillet 17b; an eighth connector 18c connecting the eighth fillet 18b and the eighth pin 18a; and an eighth bend 18f located inside the eighth fillet 18b and connected to the eighth connector 18c. The seventh branch 17 has two seventh fillets 17b, and the eighth branch 18 has two eighth fillets 18b. The eighth branch 18 has two eighth bent portions 18f such that the eighth fillet 18b, the fifth fillet 15b, and the other seventh fillet 17b are located on the same plane and welded to the same electrical element 5. The fifth bent portion 15f is also provided such that the fifth fillet 15b and the other fillets welded to the same electrical element 5 are located on the same plane.

[0040] The electrical element 5 welded to the fifth fillet 15b has six pins, and the fillets 1b welded to these pins are the fifth fillet 15b, the sixth fillet 16b, the seventh fillet 17b, and the eighth fillet 18b, respectively, and the other two fillets 1b are the first column fillet 191b of the first column branch 191 and the third column fillet 193b of the third column branch 193, which is provided opposite the first column fillet 191b.

[0041] The third electrical element 5 has two pins welded to the other seventh fillet 17b and the other eighth fillet 18b, respectively. In the insulating base 2, one welding groove 25 is provided at each location corresponding to the welding position between the electrical element 5 and the fillet.

[0042] In this embodiment, there are three electrical elements 5. The number of electrical elements 5 affects the number and arrangement of the horizontal branches 10 and column branches 19. The first pin 11a, the second pin 12a, the third pin 13a, the fourth pin 14a, the fifth pin 15a, the sixth pin 16a, the seventh pin 17a, and the eighth pin 18a are all referred to as pin 1a.

[0043] These first fillets 11b, second fillets 12b, third fillets 13b, fourth fillets 14b, fifth fillets 15b, sixth fillets 16b, seventh fillets 17b, and eighth fillets 18b are all called fillets 1b.

[0044] These first connection part 11c, second connection part 12c, third connection part 13c, fourth connection part 14c, fifth connection part 15c, sixth connection part 16c, seventh connection part 17c, and eighth connection part 18c are all referred to as connection part 1c.

[0045] The first folded portion 11f, the fifth folded portion 15f, and the eighth folded portion 18f are all referred to as folded portion 1f.

[0046] The first column branch 191 includes a first vertical column portion 191d insert-molded into the first vertical portion 311, a first column pin 191a extending upward from the tip of the first vertical column portion 191d and exposed on the top surface 32 of the first vertical portion 311, a first column fillet 191b welded to the same electrical element 5 as the fifth fillet 15b, and a first column connection portion 191c connected between the first column pin 191a and the first column fillet 191b. The first vertical column portion 191d is provided with a bent portion 194 at a position perpendicular to the first plane P1. The first vertical column portion 191d is formed by bending vertically from the first column connection portion 191c located on the first plane P1, and includes the bent portion 194. The bent portion 194 is located outside the insulating base 2 and inside the insulating frame 3. In the present invention, the first column connection portion 191c is located inside at least one of the insulating base 2 and the insulating frame 3, but in other embodiments, the vertical column portion 19d and the bent portion 194 may be located outside the insulating base 2 and inside the insulating frame 3, and the column connection portion 19c may be located inside the insulating base 2 and outside the insulating frame 3, and is not limited thereto. In the present invention, the first column connection portion 191c is located outside the insulating base 2 and inside the insulating frame 3.

[0047] The second column branch 192 includes two second vertical column sections 192d held within the second vertical section 312 and the third vertical section 313, two second column pins 192a extending upward from the tips of the second vertical column sections 192d and exposed on the top surfaces 32 of the second vertical section 312 and the third vertical section 313, and a second column connection section 192c connecting the two second vertical column sections 192d. In this case, the second column connection section 192c is located outside the insulating base 2 and inside the insulating frame 3. The second vertical column section 192d is formed by bending vertically from the second column connection section 192c located on the first plane P1, and includes the bent section 194. The bent section 194 is located outside the insulating base 2 and inside the insulating frame 3.

[0048] The third column branch 193 includes a third vertical column portion 193d held within the fourth vertical portion 314, a third column pin 193a extending upward from the tip of the third vertical column portion 193d and exposed on the top surface 32 of the fourth vertical portion 314, a third column fillet 193b welded to the same electrical element 5 as the fifth fillet 15b, and a third column connection portion 193c connected between the third column pin 193a and the third column fillet 193b. The third vertical column portion 193d is provided with a bent portion 194 at a position perpendicular to the first plane P1. The third vertical column portion 193d is formed by bending vertically from the third column connection portion 193c located on the first plane P1, and includes the bent portion 194. The bent portion 194 is located outside the insulating base 2 and inside the insulating frame 3. In the present invention, the third column connection portion 193c is located outside the insulating base 2 and inside the insulating frame 3.

[0049] These first vertical column section 191d, second vertical column section 192d, and third vertical column section 193d are all referred to as vertical column sections 19d.

[0050] The first column pin 191a, the second column pin 192a, and the third column pin 193a are all referred to as column pins 19a.

[0051] The first column fillet 191b and the third column fillet 193b are both referred to as column fillets 19b.

[0052] These first column connection section 191c, second column connection section 192c, and third column connection section 193c are all referred to as column connection section 19c.

[0053] Each of the first side 21 and second side 22 of the insulating base 2 is provided with two spaced welding grooves 28 to expose two spaced welding portions 1g in the branch, and the coil 4 is provided with two welding pins 41 corresponding to the two welding grooves 28 of the insulating base 2 for welding to the branch. The welding portions 1g may be provided on the same branch or on different branches, and in the present invention, one pair of welding portions 1g may be provided on different branches and the other pair of welding portions 1g may be provided on the same branch. Specifically, the welding portions 1g corresponding to the coil 4 located on the first side 21 are located at the second connection portion 12c of the second branch 12 and the sixth connection portion 16c of the sixth branch 16. The welding portion 1g corresponding to the coil 4 on the second side 22 is located at the first column connection portion 191c of the first column branch 191. In other embodiments, the welded portions 1g corresponding to the two welding pins 41 may protrude from the insulating base 2 and be directly exposed on the surface of the insulating base 2, that is, it may not be necessary to provide the welding groove 28.

[0054] In the present invention, the method for holding the coil 4 on the insulating base 2 can be selected from either winding the coil 4 on the insulating base 2 or mounting a chip-type coil using the SMT (Surface Mount Technology) method. If the former method is selected and the coil is assembled, it is necessary to provide bobbins 26 and positioning posts 27 on the insulating base 2 with respect to the welding groove 28, but the number of bobbins 26 and positioning posts 27 to be installed is not limited and is installed according to the needs of the product. If the latter method is selected, it is not necessary to provide bobbins 26 and positioning posts 27. However, in either case, it is necessary to achieve welding between the coil 4 and the metal circuit 1 by providing a welding area 1g. In this embodiment, the coil 4 is fixed to the insulating base 2 by winding, and a pair of bobbins 26 arranged at intervals and positioning posts 27 located below the bobbins 26 are provided on the first side 21 and second side 22 of the insulating base 2, respectively, and in this case, the welding groove 28 is provided between the bobbins 26 and the positioning posts 27. The coil 4 is fixed to a pair of bobbins 26 by winding, and the coil 4 is further provided with a pair of lead terminals 42 fixed to the positioning column 27. Finally, the welding pins 41 inside the lead terminals 42 of the coil 4 are welded to the welding portion 1g exposed within the welding groove 28, and the portion of the welding pins 41 outside is cut off.

[0055] Each of the aforementioned branches and the welded end of the coil 4 is injection molded within the insulating base 2. At least two of the coils 4 are located on the same insulating base 2, and each is independently positioned on the surface of the insulating base 2.

[0056] All electrical elements 5 are located on the same insulating base 2 as the coil 4, and are located either within or outside the area where the coil 4 is wound, but are not limited thereto. In this invention, there are three electrical elements 5, some of which are located within the area where the coil 4 is wound, and others which are located outside the area where the coil 4 is wound. The electrical elements 5 are mounted on the upper surface 20 of the insulating base 2 by surface mount technology (SMT). Surface mount technology (SMT) refers to a technology that attaches electrical elements to a printed circuit board and forms electrical connections by soldering, and in this invention, it refers to a technology that mounts the electrical elements 5 on the upper surface 20 of the insulating base 2. The placement of the electrical elements 5 affects the arrangement of the horizontal branches 10 and the column branches 19.

[0057] Furthermore, the present invention relates to a manufacturing method for producing a base 100 with a coil 4, and specifically includes the following steps.

[0058] Multiple continuous upper metal circuits 1d and multiple continuous lower metal circuits 1e are press-formed onto two material belts, and multiple continuous metal circuits 1d and lower metal circuits 1e are stacked vertically to form multiple continuous metal circuits 1. The metal circuit 1 includes a horizontal portion located on a horizontal plane and a vertical portion located on the outer periphery of the horizontal portion, the horizontal plane being the first plane P1, the horizontal portion of the metal circuit 1 being composed of the horizontal branch 10, the column fillet 19b of the column branch 19 and a part of the column connection portion 19c located on the first plane P1, and the vertical portion of the metal circuit 1 being composed of the vertical column portion 19d of the column branch 19 and the column pin 19a. The metal circuit 1 includes a plurality of horizontal branches 10 and a column branch 19 located on the outer circumference of the horizontal branches 10, wherein the column branch 19 is located on the same plane as the horizontal branches 10, one end of the plurality of horizontal branches 10 is formed as pins 1a arranged in parallel and spaced apart, the other end of the branches is formed as fillets 1b arranged together, a connection portion 1c is formed between the pins 1a and the fillets 1b, spaced-apart welded portions 1g are provided at the second connection portion 12c and the sixth connection portion 16c, one end of the column branch 19 is formed as a column pin 19a located on the outer circumference of the horizontal branches 10, and the other end is formed as a column fillet 19b located on the same plane as the fillets 1b, and a column connection portion 19c is formed between the column pin 19a and the column fillet 19b of the column branch 19. The other pair of welded portions 1g are formed on the first column connection portion 191c which is located in the horizontal plane.

[0059] A rectangular insulating base 2 is formed in the horizontal portion of the metal circuit 1 by primary injection molding. In this case, the insulating base 2 is positioned horizontally and has an outer peripheral side surface 29 and an upper surface 20 provided on its outer circumference. At this time, the vertical portion is outside the insulating base 2, and the column connection portion 19c is located outside the insulating base 2. The welding portion 1g is exposed on the upper surface 20 of the insulating base 2. A welding groove 25 is provided in the insulating base 2 at a position corresponding to the fillet 1b. The insulating base 2 is also provided with a bobbin 26 and a positioning column 27, and a welding groove 28 located between the bobbin 26 and the positioning column 27 that exposes the welding portion 1g. Within the welding groove 25, the electrical element 5 is mounted on the upper surface 20 of the insulating base 2 by surface mount technology (SMT), and further mounted by welding to the fillet 1b and column fillet 19b.

[0060] A horizontally positioned coil 4 is wound around the insulating base 2 and positioned, or a flexible circuit coil 4' is mounted, the coil 4 including two welding pins 41, the two welding pins 41 each positioned in the insulating base 2 corresponding to the welding groove 28, the welding portion 1g exposed in the welding groove 28.

[0061] The connection point between the horizontal and vertical portions of the metal circuit 1, which is located outside the insulating base 2, is bent to form a bent portion 194, and the vertical portion consists of the vertical column portion 19d and the column pin 19a, which are provided perpendicularly to the horizontal portion, thereby forming a first semi-finished product. At this time, the bent portion 194, the vertical column portion 19d, and the column pin 19a are all located outside the insulating base 2.

[0062] The first semi-finished product is subjected to secondary injection molding to form an insulating frame 3, thereby forming the base 100. Specifically, secondary injection molding is performed around the metal circuit and the insulating base 2 to form an insulating frame 3 which has a horizontally positioned frame body portion 30 that completely seals and covers the outer peripheral side surface 29 of the insulating base 2, and vertical portions 31 that extend vertically from the four sides of the upper surface of the frame body portion 30. The metal circuit 1 is then insert-molded into both the insulating base 2 and the insulating frame 3. The insulating frame 3 has a vertically positioned vertical portion 31 that covers the column connection portion 19c and into which the vertical column portion 19d is fitted, and the column pin 19a of the vertical column portion 19d is located on the top surface 32 of the vertical portion 31. The insulating frame 3 is completely sealed and covered, and has a thin-walled portion 33 corresponding to the first side 21. The fillets 1b protruding from the first side 21 of the horizontal branch 10 are arranged in a parallel line outside the thin-walled portion 33, making it easier to mount an external circuit board corresponding to the thin-walled portion 33.

[0063] Multiple independent, complete bases 100 are formed by cutting the material belt connecting the multiple bases 100, and the material belt at the connection points between the horizontal branch 10 and the column branch 19 of the metal circuit 1.

[0064] The manufacturing method for the periscope-type voice coil motor 1000 includes the process of manufacturing the base 100 described above.

[0065] In this invention, the insulating base 2 and insulating frame 3 are integrally injection-molded by two injection molding processes. First, the coil 4 (flexible circuit coil 4') and electrical elements 5 are electrically integrated onto the rectangular insulating base 2. Next, the portion of the column connection 19c of the column branch 19 of the metal circuit 1 located outside the insulating base 2 is bent to form a vertical column portion 19d (vertical portion) perpendicular to the horizontal plane. Furthermore, the portion of the metal circuit 1 located outside the insulating base 2 is insert-molded by secondary injection molding, and the insulating frame 3 that positions the insulating base 2 is formed. This enables the electrical integration (surface mounting or winding) of the coil 4 and electrical elements 5 to be performed prior to forming the vertical portion 31 that is vertically positioned on the base 100 of the periscope-type voice coil motor 1000. This eliminates the need to individually assemble the flexible circuit board (FPC) and flexible coil for each individual base, reducing assembly costs and improving yield. At the same time, the technical problem that the coil 4 and the electrical element 5 could not be mounted horizontally on the base 100 of the periscope-type voice coil motor 1000 due to the presence of a vertical section 31 is solved, which helps to improve the design flexibility of the periscope-type voice coil motor 1000. In addition, since both the coil 4 and the electrical element 5 are integrated on the insulating base 2, the structure of the product has become more compact and smaller. More importantly, since the base 100 is manufactured by injection molding the insulating base 2 on a horizontal surface and bending the metal circuit 1 after mounting the coil and electrical element, multiple bases can be manufactured on a single material belt, enabling mass production and automation. Furthermore, the primary injection-molded insulating base 2 has the fillets 1b and column fillets 19b, which are one end of the multiple branches, fixed to and exposed on its upper surface 20, and the secondary injection-molded insulating frame 3 has the pins 1a and column pins 19a, which are the other ends of the multiple branches, fixed to and exposed on its upper surface. More specifically, the pins 1a are exposed on the upper surface of the frame portion 30 of the insulating frame 3, and the column pins 19a are exposed on the top surface 32 of the vertical portion 31 of the insulating frame 3. This improves the manufacturing accuracy of the base 100 and reduces the difficulty of injection molding.

[0066] Finally, the above embodiments are merely for illustrating the technical solutions of the present invention and do not limit them. While the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in the above embodiments or to replace some or all of their technical features with equivalent ones, and that such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0067] The foregoing describes only some embodiments of the present invention, not all embodiments, and any equivalent modifications made by a person skilled in the art by reading the specification of the present invention are all included within the scope of the claims of the present invention.

Claims

1. A base with a coil used in a voice coil motor, The base consists of a metal circuit (1) and An insulating base (2) having a structure in which the aforementioned metal circuit (1) is embedded inside, An insulating frame (3) having a structure that covers the insulating base (2) and the metal circuit (1), The metal circuit (1) includes a coil (4) electrically connected to it. The metal circuit (1) has a plurality of branches, and at least some of the branches include pins (1a, 19a) and welded parts (1g), The aforementioned welded portion (1g) is fixed to the insulating base (2) and is exposed. The aforementioned pins (1a, 19a) are fixed to the insulating frame (3) and are exposed. The coil-equipped base is characterized in that the coil (4) is connected to and fixed to the corresponding welded portion (1g) so as to be electrically connected to the corresponding branch.

2. The coiled base according to claim 1, characterized in that the insulating base (2) is provided with a welding groove (28) for exposing the welding portion (1g), and the coil (4) is provided with two welding pins (41) welded to the two welding grooves (28), respectively.

3. The coiled base according to claim 1, further comprising an electrical element (5) electrically connected to the metal circuit (1), and at least some of the branches further comprising fillets (1b, 19b) and connecting portions (1c, 19c) located between the pins (1a, 19a) and the fillets (1b, 19b), wherein the fillets (1b, 19b) are fixed to and exposed on the insulating base (2), and the electrical element (5) is welded to and fixed to the fillets (1b, 19b).

4. The coiled base according to claim 3, characterized in that the electrical element (5) and the coil (4) are simultaneously fixed to the insulating base (2), and the electrical element (5) is located within the region in which the coil (4) is wound.

5. The coiled base according to claim 4, characterized in that a welding groove (25) is positioned on the insulating base (2) at a position corresponding to the fillets (1b, 19b), the fillets (1b, 19b) are exposed in the welding groove (25), the electrical element (5) is housed inside the welding groove (25), and is mounted by welding to the fillets (1b, 19b) using surface mounting technology.

6. The coiled base according to claim 4, characterized in that the insulating base (2) is arranged horizontally, the electrical element (5) and the coil (4) are simultaneously arranged horizontally on the upper surface of the insulating base (2), and the insulating frame (3) is provided with a frame body portion (30) that covers the insulating base (2) and is arranged horizontally, and a vertical portion (31) that extends vertically from the upper surface of the frame body portion (30) and is located around the coil (4).

7. The coiled base according to claim 6, characterized in that the entire frame portion (30) of the insulating frame (3) seals and covers the outer peripheral side surface (29) of the insulating base (2), and the vertical portion (31) is formed extending vertically from the upper surface of the frame portion (30).

8. The coiled base according to claim 6, wherein the branch includes a horizontal portion insert-molded into the insulating base (2), a vertical portion insert-molded into the vertical portion (31), and a bent portion (194) connected between the horizontal portion and the vertical portion, the bent portion (194) being located outside the insulating base (2) and insert-molded inside the frame portion (30).

9. The coiled base according to claim 8, wherein the plurality of branches include a plurality of column branches (19), the pins (1a, 19a) include a column pin (19a) formed at one end of the column branch (19) and exposed on the top surface (32) of the vertical portion (31), the fillets (1b, 19b) include a column fillet (19b) formed at the other end of the column branch (19) and exposed on the insulating base (2), the column fillet (19b) is formed in the horizontal portion, a vertical column portion (19d) constituting the vertical portion is formed between the column pin (19a) and the column fillet (19b) of the column branch (19), the vertical column portion (19d) is located outside the insulating base (2) and is insert molded into the vertical portion (31), and the column pin (19a) extends from the vertical column portion (19d).

10. A periscope-type voice coil motor characterized by including a coil-equipped base as described in any one of claims 1 to 9.

11. A method for manufacturing a coil-equipped base used in a voice coil motor, Multiple sequentially continuous metal circuits (1) are press-formed on a material belt, and the metal circuits (1) have multiple branches, and at least some of the branches include a first step of including pins (1a, 19a) and a welded portion (1g), A second step involves performing primary injection molding on the metal circuit (1) to form an insulating base (2), and fixing and exposing the welded portion (1g) to the insulating base (2), A third step involves electrically connecting and fixing the coil (4) to the corresponding welded portion (1g) so as to the corresponding branch, A fourth step involves performing secondary injection molding around the metal circuit (1) and the insulating base (2) to form an insulating frame (3) that covers at least a portion of the insulating base (2) and the metal circuit (1), and fixing and exposing the pins (1a, 19a) to the insulating frame (3), A method for manufacturing a coiled base according to any one of claims 1 to 9, comprising a fifth step of cutting a material belt connecting a plurality of metal circuits (1) to form a plurality of independent complete bases (100).

12. A method for manufacturing a periscope-type voice coil motor, characterized by including a step in the manufacturing method for manufacturing a coil-equipped base as described in claim 11.

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