WO2022166082A1

WO2022166082A1 - Base having coils integrated therein, voice coil motor, and manufacturing method therefor

Info

Publication number: WO2022166082A1
Application number: PCT/CN2021/102320
Authority: WO
Inventors: 吴俊辉; 杜锋; 谌龙模; 刘松华
Original assignee: 苏州昀冢电子科技股份有限公司
Priority date: 2021-02-05
Filing date: 2021-06-25
Publication date: 2022-08-11
Also published as: JP2024520107A; CN112994400B; CN112994400A

Abstract

The present invention is a base, comprising: at least two plastic retaining walls which are located in a vertical plane and arranged at intervals along a continuous trajectory, metal circuits which are embedded in the at least two plastic retaining walls, and coils which are electrically connected to the metal circuits. The metal circuits comprise a plurality of branches. The branches comprise pins which are exposed outside the plastic retaining walls and arranged in parallel at intervals, solder fillets which are exposed to side surfaces of the plastic retaining walls, and connecting portions which connect the pins and the solder fillets. The plastic retaining walls are formed by means of a first injection molding. The connecting portions are partially exposed between two adjacent plastic retaining walls. The connecting portions are bent to form bending portions such that the plastic retaining walls are located on different planes. At least one connecting column is formed outside the bending portions by means of a second injection molding and connects two adjacent plastic retaining walls. The technical problem that a coil and an electronic product cannot be vertically mounted is solved, thereby helping improve the design freedom of the voice coil motor.

Description

A base with integrated coil, voice coil motor and manufacturing method thereof

This application claims the priority of the Chinese patent application with an application date of February 5, 2021 and an application number of 202110166191.9, the entire contents of which are incorporated into this application by reference.

technical field

The invention relates to the technical field of a base integrated with a coil, a voice coil motor and a manufacturing method thereof, in particular to a base for the field of electronic equipment, a voice coil motor and a manufacturing method thereof.

Background technique

Existing bases and voice coil motors with coils usually include a base, a metal circuit injected into the base, an electronic component welded to the metal circuit, a coil formed by winding or mounted and assembled, and a coil connected to the coil. Actuating magnetic structures and other drive components. Generally, assemblers of voice coil motors need to electrically assemble the above basic components. In order to match the layout and installation requirements of various components, the layout of each component is usually difficult, and some additional assembly space needs to be reserved. For switching components, such as flexible printed circuit boards (FPC, Flexible Printed circuit) that need to integrate ICs or coils, at least part of the vertical space needs to be reserved, and the assembly space for integrated ICs or coils and FPCs needs to be designed.

For example, for a voice coil motor, a flexible printed circuit (FPC, Flexible Printed circuit) surface assembly process is usually used, so that the coil is arranged on the flexible circuit board and welded with the metal circuit in the base to achieve circuit connection. For example, the utility model patent with the publication number CN209134273U discloses a connection structure applied in a voice coil motor, including an injection molded part and a flexible circuit board (FPC). The injection molded part has a plurality of side walls that are connected in sequence to form the hollow cavity. One of the side walls is provided with a positioning cavity that penetrates through the hollow cavity. The side walls of the cavity are attached, and the FPC is mounted or wound with integrated ICs and coils, so as to achieve the effect of circuit conduction.

Another example is the invention patent application with publication number CN108989511A, a base with electronic components and a voice coil motor. On the surface, it needs to be mounted by SMT (Surface Mount Technology) in the future, and because the side of the surface to be mounted is open, the coil winding or mounting is difficult, and the position design requirements for the coil are very high. Therefore, it is difficult to automate the integrated electronic components (IC, Integrated Circuit) or coils on the vertical plane, requiring tedious manual operations, low efficiency, and poor quality stability. And when ICs or coils are integrated on a base located on a horizontal plane, they can only be assembled one by one, and the automation efficiency of assembly is very low. And now the SMT placement equipment on the market is all a processing base, there is no batch processing.

The above problems mainly occur when the existing voice coil motor manufacturers produce voice coil motors, they need to purchase parts and then position and assemble components such as flexible circuit boards/shrapnel. The positioning, processing and assembly procedures are complicated and the operating space is limited. , it is easy to cause defective parts, and then cause the overall cost to be too high. At the same time, since these purchased parts are reproduced without considering their combination and ignoring the problem of combination space design, it is necessary to reserve some installation positions when designing the voice coil motor, resulting in a waste of space and making the product The structure cannot be compact and miniaturized. And because the original coil generally needs to be integrated with the metal circuit in the base by being integrated on an independent FPC, the FPC itself is very thin and fragile, and the cost is very high. It is very difficult to install the coil, which is easy to cause defects, and the number of coils that can be wound and the thickness of the coil are affected by the thickness of the FPC, which in turn affects the size of the coil energized current and increases the loss of the circuit. In addition, the coil is wound or mounted on an independent FPC. Since the FPC is very soft, when the electronic device falls, the voice coil motor with the coil fixed on the FPC is easy to cause overall failure due to its weak integration strength.

Therefore, it is necessary to provide a new base with a coil, a voice coil motor and a manufacturing method thereof to overcome the above-mentioned defects.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a base integrated with a coil, a voice coil motor and a manufacturing method thereof.

The object of the present invention is achieved through the following technical solution: a base, comprising: at least two plastic retaining walls located on a vertical plane and spaced along a continuous track, embedded in at least two of the plastic retaining walls A metal circuit in the wall and a coil electrically connected to the metal circuit, the metal circuit includes a plurality of branches, and the plurality of branches include pins exposed outside the plastic retaining wall and arranged in parallel and spaced apart , The welding feet exposed on the side of the plastic retaining wall and the connecting portion connecting the pins and the welding legs, the at least two plastic retaining walls are formed by one injection molding, and the coils are welded to the For the welding leg, part of the connecting portion is exposed between two adjacent plastic retaining walls, the connecting portion is bent to form a bending portion so that at least two of the plastic retaining walls are located on different planes, and the bending portion is At least one connecting column portion connecting between two adjacent plastic retaining walls is formed by secondary injection molding on the outside.

Further, the base also includes a base for positioning and connecting at least two of the plastic retaining walls.

Further, the base and the connecting column are integrally arranged or separately arranged.

Further, the base, together with the plastic retaining wall and the connecting column portion form an adjustment space.

Further, the adjustment space is a columnar space that is not closed in the vertical direction.

Further, the base includes four sides, the base includes three plastic retaining walls, the three plastic retaining walls are respectively located on the three sides and are arranged in a U shape, the four The remaining side of the side is open.

Further, an installation space is formed on the remaining side of the base where the three plastic retaining walls are not provided.

Further, every two adjacent plastic retaining walls are connected into one body through the connecting column portion and are formed by plane transition.

Further, every two adjacent plastic retaining walls are arranged at a certain angle.

Further, the plastic retaining wall is provided with electronic components welded to the solder legs.

Further, the electronic element is a Hall element or a driver integrated circuit element including a Hall sensor.

Further, the pins of each branch are located on a horizontal plane perpendicular to the vertical plane, and the solder pins are located on the vertical plane.

Further, the pins are located outside any one of the plastic retaining walls.

The object of the present invention is achieved by the following technical solution 2: a voice coil motor, comprising the above-mentioned base.

Further, the voice coil motor is a periscope voice coil motor, the voice coil motor includes a reflection element disposed in the adjustment space, and the reflection element is a reflector or a prism.

The object of the present invention is achieved by the following technical solution 3: a voice coil motor, the voice coil motor is a voice coil motor with an anti-shake function, and the voice coil motor comprises an outer casing, a bearing casing, a The anti-shake magnetic element, the auto-focusing magnetic element, the movable module composed of the lens and the bracket for carrying the lens, and the above-mentioned base.

The object of the present invention is achieved through the following technical solutions four: a manufacturing method for manufacturing the above-mentioned base, comprising the steps:

The first step is to form several independent metal circuits on the same material strip, the metal circuits include several branches, and the several branches include pins 1a arranged in parallel and spaced apart, and are arranged opposite to the pins 1a the soldering pin 1b and the connecting part 1c connecting the pin 1a and the soldering pin 1b;

The second step is to injection-mold at least two plastic retaining walls on a vertical plane and spaced along a continuous track at the metal circuit, and part of the connecting portion is exposed between two adjacent plastic retaining walls ;

The third step is to weld the coil on the plastic retaining wall;

the fourth step, bending the connecting portion to form a bending portion so that at least two of the plastic retaining walls are located in different vertical planes;

the fifth step, forming a first semi-finished product by injection-molding a connecting column portion connecting two adjacent plastic retaining walls for the second time at the bending portion;

In the sixth step, the first semi-finished product is cut with a material strip to form several independent and complete bases.

Further, the seventh step between the first step and the second step: bending the pins so that the pins and the solder pins are on different planes; the plastic retaining wall in the second step is three; the fifth step further includes over-injection molding and connecting the bases of the three plastic retaining walls.

The object of the present invention is achieved by the following technical solution 5: a method for manufacturing a voice coil motor, including the above-mentioned method for manufacturing a base.

In the base with integrated coil in the present invention, by arranging a metal circuit on the base and integrating a coil interacting with the magnetic element, and by arranging a metal circuit with a number of branches on the horizontal plane, injection molding is performed at intervals on the metal circuit At least two plastic retaining walls are formed, and the at least two plastic retaining walls are located in different vertical planes by bending the connecting parts of the branches between the at least two plastic retaining walls, and then pass the second time at the connecting parts. A base connecting the at least two plastic retaining walls is injection-molded. Usually, the base is located on a horizontal plane and the at least two plastic retaining walls are located in two vertical planes perpendicular to the base, so as to realize the base of a three-dimensional structure. There is no need to mount the flexible circuit board, which reduces the assembly cost and improves the yield. At the same time, it solves the technical problem that coils and electronic products cannot be mounted vertically, which helps to improve the freedom of voice coil motor design. And because the coils and electronic components are integrated on the plastic retaining wall, the structure of the product is more compact and miniaturized. When the electronic device is dropped, it will not fail because the winding post attached to the coil is too soft. And since the base is injection-molded with two plastic retaining walls on the same plane, multiple bases can be manufactured on the same material belt, which can realize mass production and automation.

Description of drawings

FIG. 1 is an exploded perspective view of a ball-type voice coil motor with anti-shake function according to the present invention.

FIG. 2 is a perspective view of the base of the present invention.

FIG. 3 is a perspective view of FIG. 2 from another angle.

4 is an exploded perspective view of the base of the present invention.

FIG. 5 is a perspective view of the base before the second injection molding after the first injection molding and bending according to the present invention.

FIG. 6 is an exploded perspective view of FIG. 5 .

FIG. 7 is a three-dimensional schematic diagram of the base without being bent after the first injection molding.

FIG. 8 is a schematic perspective view of FIG. 7 viewed from another angle.

FIG. 9 is another embodiment of a different assembling manner of the coil in FIG. 7 .

FIG. 10 is a three-dimensional schematic diagram of the lead of the metal circuit after bending.

FIG. 11 is a three-dimensional schematic diagram of an unbent lead of a metal circuit.

Detailed ways

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense. For those of ordinary skill in the art, the above-mentioned term can be understood in the present invention under specific circumstances. specific meaning.

In the prior art, the coils and electronic components in a voice coil motor are usually integrated on a flexible circuit board (FPC) or in a vertical plane, and the coils or electronic components need to be wound or mounted in the vertical plane. , the operating space is limited, the positioning integration is very difficult, and the processing integration is limited to a single base and a single coil or electronic component, and the integration efficiency is low, which is not conducive to the cost reduction and efficiency improvement of automated mass production. First, three plastic retaining walls 3 are injection-molded at intervals on the horizontal plane on the same plane as the metal circuit 1 , and then the electronic components 4 and the coil 2 are electrically assembled or mounted on the plastic retaining walls 3 , and then the three plastic retaining walls 3 are electrically assembled or mounted on the Part of the metal circuit 1 between the plastic retaining walls 3 is bent so that the three plastic retaining walls 3 are located on different vertical planes, and then a second injection molding is performed to form a base 5 connecting the horizontal planes of the three plastic retaining walls 3, The coil 2 and the electronic components 4 in the voice coil motor are integrated on the plastic retaining wall 3 of the vertical plane perpendicular to the horizontal plane, and there is no need to re-assemble and mount the flexible circuit board (FPC) and the coil after the injection molding is completed, so that the The assembly cost is reduced, and the yield rate is improved; and the technical problem that the wound air-core coil 2 and the electronic component 4 are difficult to mount vertically is solved (electrical mounting is only applicable to the vertical corresponding space of the mounting surface is vertically open, It is conducive to mounting, but if there are two mounting surfaces in the vertical direction, it is not conducive to the electrical assembly of the mounting method, and it is forced to use manual methods), which helps to improve the voice coil motor. 1000 degrees of freedom in internal space design, and the internal structure of voice coil motor products is also more compact and miniaturized. Hereinafter, the base 100 of the present invention, the voice coil motor 1000 having the base 100 and the manufacturing method thereof will be described with reference to FIGS. 1 to 11 .

The voice coil motor is an important part for camera focusing and anti-shake. The main principle of the voice coil motor is to control the stretching position of the spring sheet by changing the DC current of the coil in the motor in a permanent magnetic field, thereby driving the lens to move up and down. Mobile phone cameras widely use the voice coil motor to realize the auto-focus function, and the position of the lens can be adjusted through the voice coil motor to present a clear image.

The traditional auto-focusing (AF, Auto Focusing) open-loop voice coil motor drive cannot know the travel required to move when focusing. It needs to travel the full travel, and depends on parameters such as contrast to meet the individual parts, and record it in the current, and supply it again After the voice coil motor coil current is in focus. The closed-loop voice coil motor has a bearing Hall sensor in the internal driver IC, which is a kind of position sensor, which can measure the magnetic flux (Gauss value) in the magnetic field, and then judge the position of the object; the closed-loop voice coil motor uses this The sensor introduces a current detection function, which is equivalent to a closed-loop control with additional negative feedback, so that each movement of the lens can be more accurate, which can reduce the number of back and forth movements of the lens and improve the focusing speed. The linearity of the open-loop voice coil motor depends on the change of the magnetic thrust of the coil and the AF magnetic element on different strokes and the change caused by the nonlinearity of the shrapnel; the closed-loop voice coil motor is completely determined by the configuration of the Hall sensor and the Hall magnetic element. Linearity compensation with driver IC. The closed-loop voice coil motor needs damping glue to control the vibration, so that when the movable module reaches the position, the stable convergence time is reduced; because the position of the closed-loop voice coil motor is not related to current, but is related to the position of the Hall sensor and the Hall magnetic element. Therefore, the posture difference is greatly reduced; when the driver IC is programming the motor, the Hall value and the code can be used for linearity compensation calculation, so that the linearity is greatly optimized. The advantage of the open-loop voice coil motor is that it can achieve automatic focusing, and the domestic technology is mature and stable, and the labor cost and material cost are low. The advantages of the closed-loop voice coil motor are that the focusing speed is fast and the focusing accuracy is high. The disadvantages are that the domestic technology is relatively immature, the production is difficult and the cost is high, and abnormal sounds are prone to occur at high frequencies. The advantages of the optical anti-shake voice coil motor are that it has anti-shake function, the image is clear, the noise is reduced, and the shooting quality in the dark light environment is improved. .

In the present invention, it relates to a voice coil motor (VCM, Voice Coil Motor) 1000. The voice coil motor can be selected in the form of a switch voice coil motor, a closed-loop voice coil motor, a ball voice coil motor, or a periscope voice coil motor, etc. type. In the present invention, it is mainly applied to a voice coil motor that is driven in at least two directions on a horizontal plane. In the specific embodiment of the present invention, there are three retaining walls. Therefore, it is specifically applied to the scenario where the voice coil motor 1000 moves in the X-axis, Y-axis in the horizontal plane and Z-axis in the vertical plane. In the present invention, it relates to a periscope voice coil motor 1000, or a ball voice coil motor 1000 with anti-shake function. In the present invention, a voice coil motor 1000 with anti-shake function is taken as an example.

Referring to FIG. 1 , the voice coil motor 1000 includes an outer casing 1001 , a carrying casing 1002 , a pair of anti-shake magnetic elements 1003 and an auto-focusing magnetic element 1003 ′ mounted on the carrying casing 1002 , a movable mold A group (a lens 1004, a bracket 1005 carrying the lens 1004) and a base 100 integrating a coil 2 interacting with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003'. The anti-shake magnetic element 1003, the auto-focusing magnetic element 1003', the lens 1004, and the bracket 1005 carrying the lens 1004 are called a movable module. In the present invention, various functions of the voice coil motor 1000 are realized by integrating the coil 2 in the base 100 and then realizing the movement in various directions (X-axis, Y-axis and Z-axis) with the movable module. Specifically, the type of voice coil motor involved in the present invention can be a periscope voice coil motor. Prisms or mirrors that handle image stabilization.

Referring to FIGS. 1 to 11 , the voice coil motor 1000 with anti-shake function is provided with a pair of anti-shake magnetic elements 1003 , and in conjunction with the anti-shake magnetic elements 1003 an additional driving coil 2 integrated on the base 100 is provided. The driving coil 2 integrated on the base 100 drives the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003 ′ to realize the anti-shake function of the voice coil motor and the movement in the circumferential direction (X axis, Y axis and Z axis). Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 9 .

The outer casing 1001 is used to fix, install and protect the external physical structure of the voice coil motor 1000, and is usually made of metal material. The lens 1004 is installed in the adjustment space 51 below, and is used to realize the movement of the lens in the horizontal (X-axis and Y-axis) or vertical direction (Z-axis) to realize focusing and anti-shake control. The anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003', which generate a magnetic field, usually interact with the coil 2 to play a driving and anti-shake adjustment effect by interacting with the lens to move. The coil 2 is energized to generate a driving torque, and interacts with the magnetic field generated by the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003' to move and adjust the lens 1004. The bracket 1005 is used to install and carry the lens 1004 . The base 100 is used to fix the above various components, and at the same time provides a circuit for supplying power to the coil 2 and the focusing coil installed in the bracket 1005 . In the prior art, the bracket 1005 carrying the lens 1004 has a hollow coil wound around the outer periphery of the bracket 1005, and then interacts with the anti-shake magnetic element 1003 and the autofocus magnetic element 1003' to adjust the lens. In the present invention, the coil 2 is not provided on the bracket 1005 carrying the lens 1004 , and the coil 2 is integrated on the base 100 . At the same time, the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003' in the present invention can interact with the coil 2 to realize the movement in the horizontal direction (X-axis and Y-axis) and vertical direction (Z-axis).

Referring to FIGS. 1 to 11 , the present invention mainly relates to a base 100 that can be applied to the above-mentioned voice coil motor 1000 . The base 100 cooperates with the focusing function and the anti-shake function of the voice coil motor 1000 , and is correspondingly provided with at least Plastic retaining walls 3 in two vertical planes, the plastic retaining walls 3 are provided with coils 2 for realizing focusing function and anti-shake function. In order to facilitate one-time molding of at least two plastic retaining walls 3 in the same plane by one-time injection molding, the present invention designs to form spaced plastic retaining walls 3 respectively, and then target the exposed metal circuits between the at least two plastic retaining walls 3 1. Bending to position the three plastic retaining walls 3 in at least two vertical planes, and then positioning and connecting the at least two plastic retaining walls by a second injection molding between the at least two plastic retaining walls 3 The base 5 of the wall 3, the plastic retaining wall 3 corresponds to the position and magnetic drive requirements of the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003' of the voice coil motor, and at least an electronic element 4 and a coil 2 with an induction function are arranged , the welding of the electronic components 4 and the coil 2 and the metal circuit 1 can be achieved in a unified plane after one injection molding, and then three plastic retaining walls can be automatically formed in the same plane at one time, and then the same The automatic welding of the electronic component 4 and the coil 2 in the plane can not only facilitate the positioning and clamping of the injection molding, but also facilitate the welding yield of the electronic component 4 and the coil 2, and increase the molding and assembly efficiency and good quality of the base 100 of the voice coil motor 1000. rate, which is conducive to improving the production efficiency of automated manufacturing. The integrated electronic element 4 can realize the closed-loop control function of focusing; the integrated corresponding coil 2 can cooperate with the corresponding anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003' to realize focus driving and anti-shake driving. The number of the electronic components 4 is not limited, and the number of the electronic components 4 may correspond to the number of inductions that need to be integrated by the voice coil motor. The number of the coils 2 needs to be at least three to correspond to the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003'. The form of the coil can also be a wound air-core coil or a patch-type flexible circuit coil (FPC coil), etc. The specific coil form is not limited in the present invention, but the patch-type flexible circuit is used in the best mode of the present invention. Circuit coil 2 or wire wound circuit coil 2'. In the present invention, three plastic retaining walls 3 are provided.

The base 100 includes three plastic retaining walls 3 vertically spaced apart, a metal circuit 1 embedded in the plastic retaining walls 3 , a coil 2 electrically connected to the metal circuit 1 , and the metal circuit 1 . 1. The welded electronic components 4 and the base 5 that is positioned and connected to the plastic retaining wall 3. The metal circuit 1 includes a plurality of branches 10 , and the plurality of branches 10 include pins 1 a exposed to the outside of the plastic retaining wall 3 and arranged in parallel and spaced apart, and solder pins exposed to the side surface of the plastic retaining wall 3 . 1b and the connecting portion 1c connecting the pins 1a and the solder pins 1b, the plastic retaining wall 3 is overmolded on the metal circuit 1 by one-shot injection molding, and the coil 2 is disposed on the plastic. A portion of the connecting portion 1c is exposed between each of the plastic retaining walls 3, and the exposed portion of the connecting portion 1c is bent to form a bending portion 1d so that the three plastic retaining walls are formed. 3 are located in different vertical planes perpendicular to the horizontal plane, and the bent portion 1d is located outside the plastic retaining wall 3 and is formed in the base 5 connecting the three plastic retaining walls 3 through secondary injection molding. During this process, connecting column portions connecting the two adjacent plastic retaining walls 3 are formed, which are respectively a first connecting column portion 531 and a second connecting column portion 532 . The base 5 and the connecting column portions 531/532 are integrally arranged or separately arranged. When forming at least two plastic retaining walls 3 , at least one connecting column portion may be formed.

Referring to FIGS. 2 to 11 , the base 100 is provided with a first side 101 and a second side 102 opposite to each other and a third side connecting the first side 101 and the second side 102 side 103 and fourth side 104 .

The three plastic retaining walls 3 include a vertically disposed first plastic retaining wall 31 located on the third side edge 103 , a second plastic retaining wall 32 located on the first side edge 101 and a fourth side edge The third plastic retaining wall 33 of 104 . The first plastic retaining wall 31 , the second plastic retaining wall 32 and the third plastic retaining wall 33 are spaced apart and connected together through a part of the metal circuit 1 . Every two adjacent plastic retaining walls 3 are arranged at a certain angle. In the present invention, two adjacent plastic retaining walls 3 are vertically arranged to enclose a hollow adjustment space 51 for installing the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003'. The lens 1004 (of course, in the periscope voice coil motor, the lens 1004 can also be a prism) is connected to the anti-shake magnetic element 1003 and the auto-focusing magnetic element 1003 respectively through the coils 2 on the three plastic retaining walls 3 ' interact to adjust the position of the lens 1004 to meet the driving requirements of the voice coil motor 1000. The cross section of the adjustment space 51 is rectangular, and is correspondingly enclosed in the first side 101 , the second side 102 , the third side 103 and the fourth side 104 . The adjustment space 51 is a columnar space that is not closed in the vertical direction. The adjustment space 51 here is hollowed out, that is, the base 5 is not disposed directly below the three plastic retaining walls 3 , in order to make the adjustment space 51 of the lens 1004 large enough to make the adjustment space 51 The components inside are not restricted by movement in the vertical direction of the bottom base 5 . The side of the base 5 not provided with the three plastic retaining walls 3 is open and an installation space 52 is formed so as to leave the arrangement space for other components in the horizontal plane, so that other components are not affected by the side base 5 . movement limit in the horizontal direction. Specifically, the base 5 is provided with a third portion 56 on the second side 102 to form the installation space 52 for installing other components in the voice coil motor 1000 , such as a photosensitive element, a lens with a lens, and the like. The installation space 52 here can optionally be set to a non-hollowed state, so as to adapt to the setting of other components that need to be carried, and the direction does not need to be adjusted.

The base 5 includes a first portion 54 that joins between the first plastic retaining wall 31 and the second plastic retaining wall 32 and is joined between the second plastic retaining wall 32 and the third plastic retaining wall 33 and the third portion 56 between the first plastic retaining wall 31 and the third plastic retaining wall 33 . The first portion 54 , the second portion 55 , and the third portion 56 together with the three plastic retaining walls 3 surround the installation space 52 . In this embodiment, the base 100 has three plastic retaining walls 3 to carry three coils 2 . In other embodiments, the base 100 can also be provided with plastic retaining walls 3 on four sides to carry more The coil 2 or the base 100 is provided with more sides to form more plastic retaining walls 3 correspondingly to perform lens driving in more directions. Correspondingly, at least a portion of the base 5 is provided to connect adjacent plastic retaining walls 3 to realize the fixing and sealing of the metal circuit portion between the plastic retaining walls 3 .

In the present invention, the metal circuit 1 includes twelve branches 10, which are a first branch 11, a second branch 12, a third branch 13, a fourth branch 14, a first branch 11, a second branch 12, a third branch 13, a fourth branch 14, a The fifth branch 15, the sixth branch 16, the seventh branch 17, the eighth branch 18, the ninth branch 19, the tenth branch 110, the eleventh branch 111 and the twelfth branch 112. Each of the branches 10 includes the pins 1a arranged at the third side 103 in parallel and spaced apart, and the solder pins 1b located on different planes from the pins 1a and connecting the pins 1a and the pins 1a. The connection portion 1c between the solder legs 1b. The pins 1a are located on the first plane P1, and the solder pins 1b are located on the second plane P2. The lead 1a of each branch 10 is located on a horizontal plane perpendicular to the vertical plane, and the solder leg 1b is located on the vertical plane. In the present invention, a portion of the connecting portion 1c is exposed between the adjacent plastic retaining walls 3, and the exposed portion of the connecting portion 1c is provided with a bending portion 1d so that three plastic retaining walls are formed. 3 are distributed in different vertical planes. In the present invention, two of the bending portions 1d are formed between two adjacent positions of the three plastic retaining walls 3 . Specifically, the first plastic retaining wall 31 and the second plastic retaining wall A first bending portion 1d1 is formed between the walls 32 , and a second bending portion 1d2 is formed between the second plastic retaining wall 32 and the third plastic retaining wall 33 . The metal circuit 1 is connected with the eight branches 10 where the first bending portion 1d1 is formed, that is, the connecting portions 1c of the eight branches 10 are bent to form the first Bending portion 1d1. The metal circuit 1 is connected with the two branches 10 where the second bending portion 1d2 is formed, that is, the connecting portion 1c of the two branches 10 is bent to form the second branch 10 . Bending portion 1d2. In other embodiments, the number of the branches 10 can be adjusted and set according to the number of electronic components 4 and coils 2 to be configured, and the number of the bent branches 10 involved at the bending part 1 will be due to the relative The position of the pin 1a changes, specifically, the farther from the position of the pin 1a, the smaller the number of branches 10 at the bending portion 1 . The first bending portion 1d1 and the second bending portion 1d2 are located outside the plastic retaining wall 3 and located in the base 5 . The first bending portion 1d1 and the second bending portion 1d2 are embedded in the first connecting column portion 531 and the second connecting column portion 532, respectively. Every two adjacent plastic retaining walls 3 are connected together through the first connecting column portion 531 and the second connecting column portion 532 and are formed into a plane transition shape.

In the present invention, the pins 1a and the solder pins 1b of each branch 10 are located on different planes. The first plastic retaining wall 31 includes a vertical portion 311 disposed vertically and a horizontally disposed bending extension portion 312 disposed perpendicular to the vertical portion 311 . The pin 1a protrudes from the bending extension portion 312 and forms a bending portion 1e at the bending extension portion 312, the pin 1a is located on the first plane P1, and the solder pin 1b is located in the first plane P1. The vertical portion 311 of the plastic retaining wall 31 , the second plastic retaining wall 32 and the third plastic retaining wall 33 . Since the vertical portion 311 , the second plastic retaining wall 32 and the third plastic retaining wall 33 are not coplanar with the bending extension portion 312 , the pins 1 a of each of the branches 10 are not coplanar. It is on a different plane from the solder fillet 1b. In the present invention, the pin 1a is located outside any one of the three plastic retaining walls 3, specifically, the pin 1a is located outside the first plastic retaining wall 31 or the third plastic retaining wall Outside wall 33.

The electronic components 4 welded to the solder legs 1 b are welded and fixed on the plastic retaining wall 3 . The plastic retaining wall 3 is provided with a welding groove (not numbered) corresponding to the welding leg 1b to accommodate the electronic component 4 so that the electronic component 4 is welded with the metal circuit 1 . The electronic element 4 is a Hall element.

In the present invention, the coil 2 and the electronic element 4 are located on the first plastic retaining wall 31 , the second plastic retaining wall 32 and the third plastic retaining wall 33 in the vertical plane. The plastic retaining wall 32 and the third plastic retaining wall 33 have an inner side close to the base 5 and an outer side away from the base 5 . The coil 2 and the electronic component 4 are located at least on one of the inner side and the outer side, that is, the coil 2 can be located on the inner side or the outer side, or the coils 2 can be arranged in a plurality of them, and they are arranged on the outer side at the same time. The inner and outer sides. The arrangement of the electronic components 4 is the same.

Referring to FIG. 7 and FIG. 8 , in the first embodiment of the present invention, the method of holding the coil 2 on the plastic retaining wall 3 can be selected to realize the winding of the coil 2 on the plastic retaining wall 3 or alternatively adopt the SMT (Surface Mount Technology) method to mount the patch coil. In this embodiment, the coil 2 is mounted on the plastic retaining wall 3 by means of SMT (Surface Mount Technology) and is electrically connected to the metal circuit 1 . The base 100 further includes a rubber plate 6 located outside the coil 2 to hold the coil 2 from falling. Referring to FIG. 9 , the coil 2 is a wire-wound coil 2 ′ and a patch-type coil 2 . Specifically, a wire-wound coil is provided on the first plastic retaining wall 31 and the third plastic retaining wall 33 2 ′, the patch coil 2 is arranged on the second plastic retaining wall 32 . A pair of winding posts 34 are disposed on the first plastic retaining wall 31 and the third plastic retaining wall 33 , and the winding coil 4 is wound around the pair of winding posts 34 for holding the winding posts 34 . Wire coil 4. The wire wound coil 2 also has a lead terminal (not shown), which is welded with a part of the metal circuit 1 exposed to the plastic retaining wall 3 . In other embodiments, the wound coil 2' and the patch coil 2 can be selected as required, which is not limited here.

The present invention also relates to a method for manufacturing the base 100 with coils, which specifically includes the following steps:

Several independent metal circuits 1 are formed on the same material strip at intervals. The metal circuit 1 includes a plurality of branches 10, and the plurality of branches 10 include pins 1a arranged in parallel and spaced apart from the pins 1a. The provided soldering pin 1b and the connecting portion 1c connecting the pin 1a and the soldering pin 1b;

Three plastic retaining walls 3 are injection-molded on the metal circuit 1 at intervals, which are a first plastic retaining wall 31 , a second plastic retaining wall 32 and a third plastic retaining wall 33 in sequence, and some of the connecting portions 1c are exposed to adjacent ones. Between the two plastic retaining walls 3 , that is, part of the connecting portion 1 c is exposed between the first plastic retaining wall 31 and the second plastic retaining wall 32 and the second plastic retaining wall 32 and the third plastic retaining wall 33 between;

An electronic component 4 and a coil 2 electrically connected to the metal circuit 1 are arranged on each of the plastic retaining walls 3 , and the coil 2 is electrically connected to the solder pins of the metal circuit by soldering or SMT mounting after winding. 1b, the electronic components 4 are soldered to the solder pins 1b of the metal circuit 1 by reflow soldering;

The connecting portion 1c is bent perpendicular to the extending direction of the branch 10 of the metal circuit 1 to form a bending portion 1d so that the three plastic retaining walls 3 are located in different vertical planes, and the three different vertical The planes are all perpendicular to the same plane. At this time, eight branches 10 are bent between the first plastic retaining wall 31 and the second plastic retaining wall 32 to form a first bending portion 1d1, and the second plastic retaining wall 32 is bent. Two branches 10 are bent between the plastic retaining wall 32 and the third plastic retaining wall 33 to form a second bending portion 1d2;

Bend the pins 1a outside the first plastic retaining wall 31 so that the pins 1a and the soldering legs 1b are on different planes. This step can also be performed before the plastic retaining wall 3 has been injection molded It is completed when the metal circuit 1 is formed, that is, when the metal circuit 1 is formed, the bending of the lead 1a can be bent, which is not limited here;

The bases 5 connecting the three plastic retaining walls 3 are injection-molded for the second time at the first bending portion 1d1 and the second bending portion 1d2, so as to connect the two adjacent plastic retaining walls 3 as The first semi-finished product of the base 100 is formed in one piece and through a plane transition;

The first semi-finished product is cut with material strips to form several independent and complete bases 100 .

In the present invention, through two injection molding, the coil 2 and the electronic component 4 are firstly arranged on the three plastic retaining walls 3 on the same plane, and then the metal circuit 1 connected to the three plastic retaining walls 3 is bent. folded to form three vertically arranged plastic retaining walls 3 located on different planes, and then through secondary injection molding to form the base 5 connecting the three plastic retaining walls 3 to form the base 100 of the three-dimensional structure, no need to perform any further steps. The mounting of the flexible circuit board (FPC) and the flexible coil in a vertical plane or in a closed mounting space reduces the assembly cost and improves the yield. At the same time, it solves the technical problem that coils and electronic products cannot be mounted vertically, which helps to improve the freedom of voice coil motor design. In addition, since the coil 2 and the electronic element 4 are integrated on the plastic retaining wall 3, the structure of the product is more compact and miniaturized. Moreover, since the base 100 is injection-molded with three plastic retaining walls on the same plane, several bases 100 can be manufactured on the same material belt, which can realize mass production and realize automation. The manufacturing method of the voice coil motor 1000 includes the manufacturing method of the base 100 described above, so that it has the same effect.

In other embodiments, the

magnetic elements

1003 and 1003 ′ can also be anti-shake magnetic elements at the same time, so that the driving coil 2 integrated on the base 100 can realize the driving anti-shake in different directions; or can be auto-focusing magnetic elements at the same time, Therefore, stronger power propulsion is achieved through the driving coil 2 integrated on the base 100 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

The above descriptions are only part of the embodiments of the present invention, not all of the embodiments. Any equivalent changes to the technical solutions of the present invention taken by those of ordinary skill in the art by reading the description of the present invention are covered by the claims of the present invention. .

Claims

A base (100), comprising: at least two plastic retaining walls (3) located on a vertical plane and spaced along a continuous track; A metal circuit (1), a coil (2) electrically connected to the metal circuit (1), the metal circuit (1) comprising a plurality of branches (10), the plurality of branches (10) comprising exposed Pins (1a) outside the plastic retaining wall (3) and arranged at intervals in parallel, soldering legs (1b) exposed on the side surface of the plastic retaining wall (3), and connecting the pins (1a) with The connecting portion (1c) of the welding leg (1b) is characterized in that: the at least two plastic retaining walls (3) are formed by one injection molding, and the coil (2) is welded to the welding leg (3). 1b), part of the connecting portion (1c) is exposed between two adjacent plastic retaining walls (3), the connecting portion (1c) is bent to form a bent portion (1d) so that at least two of the plastic retaining walls (3) are bent. The plastic retaining walls (3) are located on different planes, and at least one connecting column portion for connecting between two adjacent plastic retaining walls (3) is formed by over-injection molding on the outside of the bending portion (1d).
The base (100) according to claim 1, characterized in that: the base (100) further comprises a base (5) positioned and connected to at least two of the plastic retaining walls (3).
The base (100) according to claim 2, characterized in that: the base (5) and the connecting column portion are integrally provided or provided separately.
The base (100) according to claim 3, characterized in that: the base (5), together with the plastic retaining wall (3) and the connecting column portion, form an adjustment space (51).
The base (100) according to claim 4, characterized in that: the adjustment space (51) is a columnar space that is not closed in the vertical direction.
The base (100) according to claim 5, characterized in that: the base (100) comprises four side edges, the base (100) comprises three of the plastic retaining walls (3), three Each of the plastic retaining walls (3) are respectively located on the three sides and are arranged in a U-shape, and the remaining sides of the four sides are open.
The base (100) according to claim 6, wherein an installation space (52) is formed on the remaining side of the base (5) where the three plastic retaining walls (3) are not provided .
The base (100) with a coil according to claim 7, characterized in that: every two adjacent plastic retaining walls (3) are connected together through the connecting column portion and are formed into a plane transition.
The base (100) with coils according to claim 8, characterized in that: every two adjacent plastic retaining walls (3) are arranged at a certain angle.
The base (100) with a coil according to claim 1, characterized in that: the plastic retaining wall (3) is provided with electronic components (4) welded to the soldering legs (1b).
The base (100) with a coil according to claim 10, characterized in that: the electronic element (4) is a Hall element or a driving integrated circuit element including a Hall sensor.
The base (100) with a coil according to claim 1, characterized in that: the pin (1a) of each branch (10) is located on a horizontal plane perpendicular to the vertical plane, so The welding leg (1b) is located on the vertical plane.
The base (100) with a coil according to claim 1, wherein the pin (1a) is located at any position of one of the plastic retaining walls (3) in the plastic retaining walls (3). other than one.
A voice coil motor (1000), characterized in that: the voice coil motor (1000) comprises the base (100) according to any one of claims 1 to 13.
The voice coil motor (1000) according to claim 14, characterized in that: the voice coil motor (1000) is a periscope voice coil motor, and the voice coil motor comprises a A reflective element, the reflective element is a mirror or a prism.
A voice coil motor (1000), characterized in that: the voice coil motor (1000) is a voice coil motor with an anti-shake function, and the voice coil motor comprises an outer casing (1001), a bearing casing (1002), An anti-shake magnetic element (1003), an auto-focusing magnetic element (1003'), and a movable lens (1003) and a bracket (1005) for carrying the lens (1003) mounted on the carrying case (1002) Module and base (100) according to any one of claims 1 to 13.
A method of manufacturing the base (100) according to any one of claims 1-13, characterized in that, comprising the steps of:

The first step is to form a plurality of independent metal circuits (1) on the same material strip, the metal circuits (1) include a plurality of branches (10), and the plurality of the branches (10) include parallel and spaced apart a pin (1a), a solder leg (1b) disposed opposite to the pin (1a), and a connecting portion (1c) connecting the pin (1a) and the solder leg (1b);

In the second step, at least two plastic retaining walls (3) located on a vertical plane and spaced along a continuous track are injection-molded at the metal circuit (1), and part of the connecting portion (1c) is exposed to the phase between two adjacent plastic retaining walls (3);

The third step is to weld the coil (2) on the plastic retaining wall (3);

the fourth step, bending the connecting portion (1c) to form a bending portion (1d) so that at least two of the plastic retaining walls (3) are located in different vertical planes;

In the fifth step, a second injection-molding connecting column portion connecting the two adjacent plastic retaining walls (3) is formed at the bending portion (1d), and a first semi-finished product is formed;

In the sixth step, the first semi-finished product is cut with material strips to form several independent and complete bases (100).
A method for manufacturing a voice coil motor, further comprising a seventh step between the first step and the second step: bending the lead (1a) so that the lead and the soldering The feet (1b) are located on different planes; the number of plastic retaining walls (3) in the second step is three; and the fifth step further includes a secondary injection molding and connecting the three plastic retaining walls (3) base (5).
A method for manufacturing a voice coil motor, characterized in that it includes the method for manufacturing a base according to claim 17 or 18.