Pedestal with coil, periscope type voice coil motor and manufacturing method thereof

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 voice coil motors, and manufacturing methods thereof, and particularly to pedestals, periscope voice coil motors, and manufacturing methods thereof for the field of electronic devices.

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 with the coil. Generally, assemblers of voice coil motors need to electrically assemble the above basic components. However, it is usually difficult to layout each component to meet 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 or the coil on the FPC. Conventional pedestals with coils and periscope voice coil motors usually achieve the line communication function by using the FPC surface assembly process. However, in the assembly process, there are limitations in 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, usually, a voice coil motor is used in the surface assembly process of a flexible printed circuit (FPC). The coil is arranged on the flexible printed circuit board and welded to the metal circuit in the pedestal to achieve the function of line communication. 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 printed circuit board (FPC). The injection molded product has a plurality of side walls sequentially connected in the circumferential direction to form a hollow cavity. A positioning cavity penetrating the hollow cavity is opened in one of the side walls. The flexible printed circuit board FPC is attached to the side wall having the positioning cavity. 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 the vertical surface of the plastic, and the subsequent mounted coil is also mounted on the vertical surface of the plastic. Then, it is necessary to go through the mounting by surface mount technology (SMT). Moreover, since the mounting by SMT requires that the side of the mounting surface be open, the winding and mounting of the coil are relatively difficult, and the requirements for the position design of the coil are very high. Therefore, integrating electrical elements (IC: Integrated Circuit) and coils on the 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 IC and the coil are integrated on a pedestal located on the 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 the pedestal individually, not in batch. In the case of a periscope-type voice coil motor, although the coil and the electrical element are mounted on the horizontal plane, there are four struts provided on the peripheral side of the insulating base, and it is difficult to assemble the coil and the electrical element in the space inside the four struts, and automation is also difficult.

[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 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, brittle, and quite costly by itself. So, 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 turns 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 with 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 periscope type voice coil motor, and their manufacturing methods.

Summary of the Invention

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

[0009] The object of the present invention is achieved by the following technical solution 1, that is, a pedestal with a coil used in a voice coil motor. The pedestal includes a metal circuit, an insulating base overmolded on the metal circuit by primary injection molding, an insulating frame overmolded on 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, and at least some of the branches include pins and welding parts. The welding part is fixed to and exposed on the insulating base. The pin is fixed to and exposed on the insulating frame. The coil is connected and fixed to the corresponding welding part so as to be electrically connected to the corresponding branch.

[0010] The object of the present invention is achieved by the following technical solution 2, that is, a periscope type voice coil motor including the above pedestal with a coil.

[0011] The object of the present invention is the following technical solution 3, that is, a manufacturing method of a pedestal with a coil used in a voice coil motor as described above, a first step of press-forming a plurality of sequentially continuous metal circuits on a material belt, the metal circuit having a plurality of branches, and at least some of the branches including pins and welding parts; a second step of performing primary injection molding on the metal circuit to form an insulating base, fixing and exposing the welding part on the insulating base; a third step of electrically connecting and fixing the coil to the corresponding welding part so as to be electrically connected to the corresponding branch; a fourth step of performing secondary injection molding around the metal circuit and the insulating base to form an insulating frame covering at least a part of the insulating base and the metal circuit, and fixing and exposing the pin on the insulating frame; and a fifth step of cutting the material belt connecting the plurality of metal circuits to form a plurality of independent and complete pedestals.

[0012] The object of the present invention is achieved by a manufacturing method of a periscope type voice coil motor including the steps of the following technical solution 4, that is, a manufacturing method of a pedestal with a coil as described above.

[0013] According to the pedestal with a coil of the present invention, through two injection moldings, an insulating base and an insulating frame are molded, realizing not only the embedding and fixing of a metal circuit, but also smoothly completing the electrical connection between the coil and the metal circuit and the integrated mounting in the pedestal, improving the design freedom of the periscope type voice coil motor, and realizing the reduction of assembly cost and the improvement of yield. At the same time, according to the present invention, in the manufacturing process of the pedestal, the coil can be directly integrated into the pedestal, making the structure of the product more compact and miniaturized. When the electronic device drops, the flexible circuit board with a coil is not too soft to fail. And in the manufacturing process, a plurality of pedestals can be connected to one material belt through the metal circuit, enabling mass production and automation.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Description of Symbols

[0015] With reference to the symbols of periscope type voice coil motor 1000, photosensitive assembly 1001, optical lens 1002, reflecting element 1003, pedestal 100, metal circuit 1, pin 1a, fillet 1b, connection part 1c, upper layer metal circuit 1d, lower layer metal circuit 1e, bending part 1f, welding part 1g, horizontal branch 10, first branch 11, first pin 11a, first fillet 11b, first connection part 11c, first bending part 11f, second branch 12, second pin 12a, second fillet 12b, second connection part 12c, third branch 13, third pin 13a, third fillet 13b, third connection part 13c, fourth branch 14, fourth pin 14a, fourth fillet 14b, fourth connection part 14c, fifth branch 15, fifth pin 15a, fifth fillet 15b, fifth connection part 15c, fifth bending part 15f, sixth branch 16, sixth pin 16a, sixth fillet 16b, sixth connection part 16c, seventh branch 17, seventh pin 17a, seventh fillet 17b, seventh connection part 17c, eighth branch 18, eighth pin 18a, eighth fillet 18b, eighth connection part 18c, eighth bending part 18f, column branch 19, column pin 19a, column fillet 19b, column connection part 19c, vertical column part 19d, first column branch 191, first column pin 191a, first column fillet 191b, first column connection part 191c, first vertical column part 191d, second column branch 192, second column pin 192a, second column connection part 192c, second vertical column part 192d, third column branch 193, third column pin 193a, third column fillet 193b, third column connection part 193c, third vertical column part 193d, bending part 194, insulating base 2, upper surface 20, first side 21, second side 22, third side 23, fourth side 24, welding groove 25, bobbin 26, positioning column 27, welding groove 28, outer peripheral side surface 29, insulating frame 3, frame body part 30, vertical part 31, first vertical part 311, second vertical part 312, third vertical part 313, fourth vertical part 314, top surface 32, thin part 33, coil 4, flexible circuit coil 4’, welding pin 41, lead terminal 42, electrical element 5, the symbol of the first plane P1 will be described.

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

Embodiment 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” 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 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.

[0019] For the periscope type voice coil motor according to the prior art, it is necessary to perform subsequent integration with the coil. 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 is repositioned with respect to the pedestal 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 plays the role of relay connection and positioning. Instead, integration by winding is performed simultaneously with the injection molding of the pedestal, 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 pedestal, and it is necessary to wind or mount the coil or electrical elements 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 electrical 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, so that the vertical portion (vertical column portion 19d) is insert-molded into the insulating frame 3. In the present invention, for the electrical element 5 and the coil 4, the electrical welding between the electrical element 5, the coil 4 and the metal circuit 1 has been completed before the vertical portion of the insulating frame 3 is molded, and it is not necessary to adopt the reassembly of the flexible printed circuit board (FPC) and the coil with the pedestal on which 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 a case where the space perpendicular to the mounting surface is vertically open. However, when there are two mounting surfaces that are spaced apart and parallel in the vertical direction, it is not advantageous for electrical assembly by mounting, and only manual work has to be adopted. Therefore, the technical problem that it is difficult to mount the electrical element 5 and the wound air-core coil 4 on 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 pedestal 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 limitation of the mobile phone, a normal vertical placement (i.e., facing outward on the surface of the mobile phone) form is adopted. However, since the focal length of the camera in the mobile phone is small, the optical zoom ability is limited. In contrast, in the present invention, different from the conventional vertical placement of the lens, as shown in FIG. 1, the periscope type voice coil motor 1000 is horizontally placed in the mobile phone. The periscope type voice coil motor 1000 includes a photosensitive assembly 1001, an optical lens 1002, a magnetic element (not shown) held by the optical lens 1002, a reflecting element 1003, a pedestal 100 integrated with a coil 4 that interacts with the magnetic element, 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 located between the photosensitive assembly 1001 and the reflecting element 1003. Thereby, ambient light is first reflected by the reflecting element 1003, and the propagation direction of the ambient light is changed so that the light incident vertically on the camera of the mobile phone changes to lateral light, and after passing through the optical lens 1002, it 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 being energized to move the lens holder. This will be described in detail below.

[0022] In a voice coil motor according to the prior art, on one side of the pedestal 100 on which the optical lens 1002 is placed, there is provided an air-core coil wound around a flexible circuit board, and further, it interacts with a magnetic element to adjust the optical lens. In the present invention, the coil 4 is integrated with the pedestal 100. Also, the magnetic element in the present invention may interact with the coil 4 to realize movement in the horizontal plane (in the X-axis direction or Y-axis direction) or movement in the vertical direction (Z-axis direction), and is not limited herein. The form of the coil may adopt a wound hollow coil 4, a chip-type flexible circuit coil (FP Coil) 4', 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 wound or chip-type flexible circuit coil is adopted. Shown in FIG. 2 is a chip-type flexible circuit coil 4', and shown in FIG. 3 is a wound coil 4.

[0023] Referring to FIGS. 1 to 9, the pedestal 100 includes 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 arranged and has an outer peripheral side surface 29 and an upper surface 20 provided on the outer periphery. The insulating frame 3 is located outside the outer peripheral side surface 29 of the insulating base 2. The insulating base 2 is located in a first plane P1. The insulating base 2 is overmolded on the metal circuit 1 by primary injection molding. The coil 4 is provided on the upper surface 20 of the insulating base 2. The pedestal 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 is hermetically covered and horizontally arranged on the outer peripheral side surface 29 of the insulating base 2, and a vertical portion 31 that extends vertically from the four circumferences 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 FIG. 5, the insulating base 2 is provided in a rectangular shape having a first side 21 and a third side 23 provided opposite to 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 the outer peripheral side surface 29 provided on its outer periphery and a surface exposed outside the insulating frame 3. In the present invention, the outer peripheral side surface 29 is a side surface corresponding to the first side 21, the second side 22, the third side 23, and the fourth side 24. In other embodiments, the outer peripheral side surface 29 is a side surface in contact with 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, two coils 4 for realizing autofocus by interacting with the magnetic element are provided on the pedestal 100. The two coils 4 are respectively provided close to the first side 21 and the second side 22, and the longitudinal directions of the two coils 4 are orthogonal to each other. The insulating base 2 includes a pair of bobbins 26 provided at intervals in the extending directions of the first side 21 and the second side 22 respectively, a pair of positioning posts 27 located inside the pair of bobbins 26, and welding grooves 28 located between each bobbin 26 and the corresponding positioning post 27 on the same side thereof. The insulating base 2 is further provided with a plurality of welding concave grooves 25 for exposing the fillet 1b of the metal circuit 1 to enable welding with the electrical element 5. In the present invention, the pedestal 100 has three electrical elements 5.

[0025] The insulating frame 3 is secondarily injection-molded so as to be integrally connected to the insulating base 2. The insulating frame 3 includes a horizontally arranged frame body portion 30, a vertical portion 31 arranged perpendicular to the first plane P1 and vertically extending from the four peripheries of the upper surface of the frame body portion 30, and a top surface 32 located on the surface of the vertical portion 31. The insulating frame 3 is formed so as to entirely seal and cover, and has a thin-walled portion 33. The thin-walled portion 33 is formed on one side of the frame body portion 30. In the present invention, the thin-walled portion 33 is provided corresponding to the first side 21. A pin 1a, which will be described later, is exposed on the surface of the thin-walled portion 33. Since the insulating frame 3 is formed so as to entirely seal and cover, the structural strength of the pedestal 100 after injection molding is better. Also, since the thin-walled portion 33 is thinned, attachment to an external circuit board (not shown) becomes easier, and the thickness space after mounting does not increase either. The vertical portion 31 includes a first vertical portion 311 provided at the intersection position of the first side 21 and the second side 22, a second vertical portion 312 provided at the intersection position of the first side 21 and the fourth side 24, a third vertical portion 313 provided at the intersection position of the fourth side 24 and the third side 23, and a fourth vertical portion 314 provided at the intersection position of the second side 22 and the third side 23.

[0026] Referring to FIG. 9, the metal circuit 1 is a metal circuit provided with two layers including an upper layer metal circuit 1d and a lower layer 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, other directions may also be possible. 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. A bent portion 194 is formed by bending between the horizontal portion and the vertical portion, and the bent portion 194 is accommodated 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 including at least two column branches 19 located on the peripheral side of the plurality of horizontal branches 10. One ends of the plurality of horizontal branches 10 are arranged in parallel at intervals as pins 1a exposed outside the insulating base 2, and the other ends of the horizontal branches 10 are arranged as fillets 1b electrically connected to the pins of the electrical element 5, and a connection portion 1c is formed between the fillet 1b and the pin 1a for 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 layer 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 layer metal circuit 1e located in the lower layer. Between the fillet 1b and the connection portion 1c of the upper layer metal circuit 1d, a bent portion 1f is provided so that the fillet 1b of the upper layer metal circuit 1d and the fillet 1b of the lower layer metal circuit 1e are located in 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 pedestal 100 has three of the column branches 19. Each of the column branches 19 includes the horizontal portion and the vertical portion. The vertical portion of the column branch 19 is distributed on the outer periphery of one side surface of the insulating base 2. The electrical element 5 and the coil 4 are provided on the horizontal portion between the vertical portions of at least two of the column branches 19. Specifically, at one end of the column branch 19, a column pin 19a exposed on the top surface 32 of the insulating frame 3 is provided, and the other end is arranged as a column fillet 19b welded to the electrical element 5. Between the column pin 19a and the column fillet 19b, a column connection portion 19c having a vertical column portion 19d located on the circumferential side of the horizontal branch 10 is formed. The vertical column portion 19d is perpendicular to the first plane P1 and is located outside the insulating base 2 and inside the insulating frame 3. The connection portion between the vertical column portion 19d and the column connection portion 19c in 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 position 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 position of the second side 22 and the third side 23. At this time, 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 is 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 in the first plane P1. The vertical portion of the metal circuit 1 is composed of the vertical column portion 19d and the column pin 19a of the column branch 19. The horizontal portion is insert-molded on the insulating base 2, the vertical portion is insert-molded on 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-layer metal circuit 1d or the lower-layer metal circuit 1e. In the present invention, the column branch 19 is a part of the lower-layer metal circuit 1e. However, in other embodiments, the column branch 19 may be a part of the upper-layer metal circuit 1d, or may be composed of both a part of the upper-layer metal circuit 1d and a part of the lower-layer 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 pin 11a, and a first bending 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 connection portion 12c connecting the second pin 12a and the second fillet 12b. The first fillet 11b is arranged in two different rows 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 connection portion 13c connected between the third pin 13a and the third fillet 13b. The third fillet 13b is arranged on the right side in the same row as the second fillet 12b and is provided opposite to 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 connection portion 14c connected between the fourth pin 14a and the fourth fillet 14b. The fourth fillet 14b is arranged on the left side in the same column as the first fillet 11b and is provided opposite to the second fillet 12b.

[0035] One of the electrical elements 5 has four pins respectively welded to the first fillet 11b, the second fillet 12b, the third fillet 13b, and the fourth fillet 14b. The first bending portion 11f is formed such that the first fillet 11b, the second fillet 12b, the third fillet 13b, and the fourth fillet 14b are located in 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 pin 15a, and a fifth bending 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 connection portion 16c connected between the sixth fillet 16b and the sixth pin 16a. The sixth fillet 16b is provided opposite to 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 on the right side 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 connection part 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 on the opposite side of 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 connection part 18c connecting the eighth fillet 18b and the eighth pin 18a, and an eighth bending part 18f located inside the eighth fillet 18b and connected to the eighth connection part 18c. The seventh branch 17 has two of the seventh fillets 17b, and the eighth branch 18 has two of the eighth fillets 18b. The eighth branch 18 has two of the eighth bending parts 18f such that the eighth fillet 18b, the fifth fillet 15b, and the other seventh fillets 17b are located in the same plane and welded to the same electrical element 5. The fifth bending part 15f is also provided such that the fifth fillet 15b and other fillets welded to the same electrical element 5 as it are located in 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 respectively the fifth fillet 15b, the sixth fillet 16b, the seventh fillet 17b, and the eighth fillet 18b. The other two fillets 1b are respectively the first column fillet 191b of the first column branch 191 and the third column fillet 193b provided opposite to the first column fillet 191b of the third column branch 193.

[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, welding grooves 25 are provided one by one at positions corresponding to each welding position of 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. These first pin 11a, second pin 12a, third pin 13a, fourth pin 14a, fifth pin 15a, sixth pin 16a, seventh pin 17a, and eighth pin 18a are all called pin 1a.

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

[0045] The first bending part 11f, the fifth bending part 15f, and the eighth bending part 18f are all called bending part 1f.

[0046] The first column branch 191 includes a first vertical column portion 191d insert-molded within 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 connecting 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 vertically bending from the first column connection portion 191c located in 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 within at least one of the insulating base 2 and the insulating frame 3. However, in other embodiments, it is sufficient that the vertical column portion 19d and the bent portion 194 are 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 herein. 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 portions 192d held within the second vertical portion 312 and the third vertical portion 313, two second column pins 192a extending upward from the tips of the second vertical column portions 192d and exposed on the top surfaces 32 of the second vertical portion 312 and the third vertical portion 313, and a second column connection portion 192c connecting between the two second vertical column portions 192d. At this time, the second column connection portion 192c is located outside the insulating base 2 and inside the insulating frame 3. The second vertical column portion 192d is formed by vertically bending from the second column connection portion 192c located in 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.

[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 vertically bending from the third column connection portion 193c located in 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 portions 191d, second vertical column portions 192d, and third vertical column portions 193d are all called vertical column portions 19d.

[0050] These first column pins 191a, second column pins 192a, and third column pins 193a are all called column pins 19a.

[0051] These first column fillets 191b and third column fillets 193b are both called column fillets 19b.

[0052] These first column connection portions 191c, second column connection portions 192c, and third column connection portions 193c are all called column connection portions 19c.

[0053] On each of the first side 21 and the second side 22 of the insulating base 2, two of the welding grooves 28 are provided at intervals for exposing two spaced welding sites 1g in the branch. For the coil 4 to be welded to the branch, two welding pins 41 are provided corresponding to the two welding grooves 28 of the insulating base 2 respectively. The welding sites 1g may be provided on the same branch or on different branches. In the present invention, a pair of the welding sites 1g are provided on different branches, and another pair of the welding sites 1g are provided on the same branch. Specifically, the welding site 1g corresponding to the coil 4 located on the first side 21 is 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 site 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 another embodiment, the welding sites 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 is not necessary to provide the welding grooves 28.

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

[0055] One end side of each of the branches welded to the coil 4 is injection-molded inside the insulating base 2. At least two of the coils 4 are both located on the same insulating base 2, and each is independently positioned on the surface of the insulating base 2.

[0056] All of the electrical components 5 are located on the same insulating base 2 as the coil 4. The electrical components 5 are located within or outside the area where the coil 4 is wound, but are not limited here. In the present invention, there are three electrical components 5, some of which are provided within the area where the coil 4 is wound, and some are provided outside the area where the coil 4 is wound. The electrical component 5 is mounted on the upper surface 20 of the insulating base 2 by surface mount technology (SMT: Surface Mount Technology). The surface mount technology (SMT) mentioned here is a technology for attaching electrical components to a printed circuit board and forming an electrical connection by soldering. In the present invention, it is a technology for mounting the electrical component 5 on the upper surface 20 of the insulating base 2. The installation position of the electrical component 5 affects the arrangement of the horizontal branch 10 and the column branch 19.

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

[0058] On two material belts, a plurality of continuous upper-layer metal circuits 1d and a plurality of continuous lower-layer metal circuits 1e are press-formed respectively, and the upper-layer metal circuit 1d and the lower-layer metal circuit 1e are stacked vertically to form a plurality of continuous metal circuits 1. The metal circuit 1 includes a horizontal portion located in a horizontal plane and a vertical portion located on the outer peripheral side of the horizontal portion. The horizontal plane at this time is the first plane P1, and the horizontal portion of the metal circuit 1 is composed of a part of the horizontal branch 10, the column fillet 19b of the column branch 19, and the column connection portion 19c located on the first plane P1. The vertical portion of the metal circuit 1 is 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 periphery of the horizontal branch 10. At this time, the column branch 19 is located in the same plane as the horizontal branch 10. One ends of the plurality of horizontal branches 10 are formed by arranging pins 1a in parallel and at intervals, and the other ends of the branches are formed by arranging fillets 1b. A connection portion 1c is formed between the pin 1a and the fillet 1b. Welding sites 1g with intervals 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 periphery of the horizontal branch 10, and the other end is formed by arranging column fillets 19b located in the same plane as the fillet 1b. 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 the welding sites 1g is formed at the first column connection portion 191c located in a horizontal plane.

[0059] In the horizontal portion of the metal circuit 1, a rectangular insulating base 2 is formed by primary injection molding. In this case, the insulating base 2 is horizontally arranged and has an outer peripheral side surface 29 and an upper surface 20 provided on the outer periphery. 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 concave groove 25 is provided at a position corresponding to the fillet 1b in the insulating base 2, and a bobbin 26, a positioning column 27, and a welding groove 28 that is located between the bobbin 26 and the positioning column 27 and exposes the welding portion 1g are provided on the insulating base 2. In the welding concave 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 with the fillet 1b and the column fillet 19b.

[0060] The insulating base 2 is wound with a horizontally arranged coil 4 for positioning, or a flexible circuit coil 4' is mounted. The coil 4 includes two welding pins 41, and the two welding pins 41 are respectively arranged corresponding to the welding groove 28 of the insulating base 2 so as to correspond to the welding portion 1g exposed in the welding groove 28.

[0061] The connection portion between the horizontal portion and the vertical portion of the metal circuit 1 outside the insulating base 2 is bent to form a bent portion 194, and a vertical portion including a vertical column portion 19d and a column pin 19a provided vertically on the horizontal portion is formed to form a first semi-finished product. At this time, both the bent portion 194, the vertical column portion 19d, and the column pin 19a are located outside the insulating base 2.

[0062] The first semi-finished product is subjected to secondary injection molding to form the insulating frame 3, thereby forming the pedestal 100. That is, secondary injection molding is performed around the metal circuit and the insulating base 2 to entirely seal and cover the outer peripheral side surface 29 of the insulating base 2 and form an insulating frame 3 provided with a frame body portion 30 disposed horizontally and a vertical portion 31 extending vertically from the four circumferences of the upper surface of the frame body portion 30. The metal circuit 1 is insert-molded into both the insulating base 2 and the insulating frame 3. The insulating frame 3 covers the column connection portion 19c and has a vertically disposed vertical portion 31 for fitting the vertical column portion 19d. 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 entirely seals and covers and has a thin-walled portion 33 corresponding to the first side 21. The fillet 1b protruding from the first side 21 of the horizontal branch 10 is arranged in a row parallel to the outside of the thin-walled portion 33, and attachment of an external circuit board can be more easily performed corresponding to the thin-walled portion 33.

[0063] A plurality of the pedestals 100 are formed by connecting the material belts of the plurality of pedestals 100 and cutting the material belts at the connection locations between the horizontal branch 10 and the column branch 19 of the metal circuit 1.

[0064] The manufacturing method of the periscope type voice coil motor 1000 includes the step of manufacturing the pedestal 100 described above.

[0065] In the present invention, by means of two injection moldings, the insulating base 2 and the insulating frame 3 are integrally injection molded. First, the coil 4 (flexible circuit coil 4') and the electrical element 5 are electrically integrated on the rectangular insulating base 2. Next, the portion of the column connection portion 19c of the column branch 19 of the metal circuit 1 that is located outside the insulating base 2 is bent to form a vertical column portion 19d (vertical portion) perpendicular to the horizontal plane. Furthermore, by means of secondary injection molding, the portion of the metal circuit 1 that is located outside the insulating base 2 is insert molded and an insulating frame 3 for positioning the insulating base 2 is formed. Prior to forming the vertically arranged vertical portion 31 of the pedestal 100 in the periscope type voice coil motor 1000, electrical integration (surface mounting or winding) of the coil 4 and the electrical element 5 is realized. There is no need to individually perform assembly by mounting a flexible circuit board (FPC) and a flexible coil for each single pedestal, the assembly cost is reduced, and the yield is improved. At the same time, the technical problem that the coil 4 and the electrical element 5 cannot be horizontally mounted on the pedestal 100 of the periscope type voice coil motor 1000 with the vertical portion 31 present is solved, which helps to improve the design freedom of the periscope type voice coil motor 1000. Also, since both the coil 4 and the electrical element 5 are integrated on the insulating base 2, the structure of the product becomes more compact and smaller. More importantly, for the pedestal 100, since the insulating base 2 is injection molded on the horizontal plane and the metal circuit 1 is bent after mounting the coil and the electrical element, a plurality of pedestals can be manufactured on one material belt, enabling mass production and automation. Furthermore, due to the primary injection molded insulating base 2, the fillets 1b and the column fillets 19b, which are one ends of the plurality of branches, are fixed and exposed on its upper surface 20. Due to the secondary injection molded insulating frame 3, the pins 1a and the column pins 19a, which are the other ends of the plurality of branches, are fixed and exposed on its upper surface. More specifically, the pin 1a is exposed on the upper surface of the frame body portion 30 of the insulating frame 3, and the column pin 19a is exposed on the top surface 32 of the vertical portion 31 of the insulating frame 3, which can improve the manufacturing accuracy of the pedestal 100 and reduce the manufacturing difficulty of injection molding.

[0066] Finally, the above embodiments are merely 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.

[0067] 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 shall be included in the scope of the claims of the present invention.

Claims

1. A pedestal with a coil used in a voice coil motor, wherein the pedestal includes a metal circuit (1), an insulating base (2) overmolded on the metal circuit (1) by primary injection molding, an insulating frame (3) overmolded on the insulating base (2) and the metal circuit (1) by secondary injection molding, and a coil (4) electrically connected to the metal circuit (1). The metal circuit (1) has a plurality of branches, and at least some of the branches include pins (1a, 19a) and welding parts (1g). The welding parts (1g) are fixed to and exposed on the insulating base (2), the pins (1a, 19a) are fixed to and exposed on the insulating frame (3), and the coil (4) is connected and fixed to the corresponding welding parts (1g) so as to be electrically connected to the corresponding branches. A pedestal with a coil is characterized by the above.

2. The insulating base (2) is provided with a welding groove (28) for exposing the welding part (1g), and the coil (4) is provided with two welding pins (41) respectively welded to the two welding grooves (28). The pedestal with a coil according to Claim 1 is characterized by the above.

3. Furthermore, it includes an electrical element (5) electrically connected to the metal circuit (1). At least some of the branches further include fillets (1b, 19b) and connection parts (1c, 19c) located between the pins (1a, 19a) and the fillets (1b, 19b). The fillets (1b, 19b) are fixed to and exposed on the insulating base (2), and the electrical element (5) is welded and fixed to the fillets (1b, 19b). The pedestal with a coil according to Claim 1 is characterized by the above.

4. 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 where the coil (4) is wound. The pedestal with a coil according to Claim 3 is characterized by the above.

5. A welding groove (25) is arranged at a position corresponding to the fillets (1b, 19b) of the insulating base (2), the fillets (1b, 19b) are exposed in the welding groove (25), the electrical element (5) is accommodated inside the welding groove (25), and is mounted by being welded to the fillets (1b, 19b) by surface mounting technology. The pedestal with a coil according to claim 4, characterized in that.

6. 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) covers the insulating base (2) and has a horizontally arranged frame portion (30) and a vertical portion (31) that extends vertically from the upper surface of the frame portion (30) and is located around the coil (4). The pedestal with a coil according to claim 4, characterized in that.

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

8. The branch includes a horizontal portion insert-molded in the insulating base (2), a vertical portion insert-molded in the vertical portion (31), and a bent portion (194) connected between the horizontal portion and the vertical portion. The bent portion (194) is located outside the insulating base (2) and is insert-molded inside the frame portion (30). The pedestal with a coil according to claim 6, characterized in that.

9. The plurality of the branches include a plurality of column branches (19), the pins (1a, 19a) include column pins (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 column fillets (19b) formed at the other end of the column branch (19) and exposed on the insulating base (2), the column fillets (19b) are formed on the horizontal portion, and a vertical column portion (19d) that constitutes 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 insert-molded on the vertical portion (31), and the column pin (19a) is formed to extend from the vertical column portion (19d). The pedestal with coil according to claim 8, characterized in that.

10. A periscope type voice coil motor, characterized by including the pedestal with coil according to any one of claims 1 to 9.

11. A method for manufacturing a pedestal with coil used in a voice coil motor, Press-molding a plurality of sequentially continuous metal circuits (1) on a material belt, the metal circuit (1) having a plurality of branches, and at least a part of the branches including a first step of including pins (1a, 19a) and welding parts (1g); Performing primary injection molding on the metal circuit (1) to form an insulating base (2), and a second step of fixing and exposing the welding part (1g) on the insulating base (2); A third step of electrically connecting and fixing the coil (4) to the corresponding welding part (1g) so as to be electrically connected to the corresponding branch; Performing secondary injection molding around the metal circuit (1) and the insulating base (2) to form an insulating frame (3) covering at least a part of the insulating base (2) and the metal circuit (1), and a fourth step of fixing and exposing the pins (1a, 19a) on the insulating frame (3); A method for manufacturing a pedestal with coil according to any one of claims 1 to 9, characterized by including a fifth step of cutting a material belt connecting the plurality of metal circuits (1) to form a plurality of independent complete pedestals (100).

12. A method for manufacturing a periscope type voice coil motor, characterized by including the steps of the manufacturing method for manufacturing the pedestal with coil according to claim 11.

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