The present disclosure relates to the field of electronic components, for example to a base with an electronic component and a voice coil motor.
The base with Hall element in the voice coil closed-loop motor of mobile phone camera module includes the Hall element, a flexible printed circuit board (FPC) and a plastic shell. The Hall element is welded on the FPC, and the whole of the Hall element and the FPC is embedded in the plastic shell. The production cost of the FPC in the base with the above structure is high, which leads to a high overall cost of the base. In addition, in the production process of the base, the Hall element is welded on the FPC, and it is further necessary to assemble the FPC with the Hall element to the plastic shell of the base, which increases the assembly steps and reduces the work efficiency.
Based on the above problems, there is a need for a base with an electronic component and a voice coil motor, which can solve the problems of complex process, low production efficiency and high production cost in related technologies.
The present disclosure provides a base with an electronic component and a voice coil motor to solve the problems of complex process, low production efficiency and high production cost in the related technologies.
The present disclosure provides a base with an electronic component, the base includes:
In an embodiment, the first plastic part includes a plurality of positioning assemblies configured to limit the first end of each branch circuit connected to the electronic component in at least three different directions.
In an embodiment, the first plastic part includes a plurality of positioning assemblies connected to the plurality of branch circuits in a one-to-one correspondence, and each positioning assembly is configured to limit the first end of the corresponding branch circuit connected to the electronic component in at least three different directions.
In an embodiment, each positioning assembly includes at least three limiting blocks, and different limiting blocks abut against different positions on the corresponding branch circuit.
In an embodiment, the metallic circuit includes a metal substrate and a protective layer, the plurality of branch circuits are made of the metal substrate, and the protective layer covers an outer surface of the metal substrate.
In an embodiment, the protective layer includes an anti-oxidation layer, and a flux layer that covers an outside of the anti-oxidation layer.
In an embodiment, the first plastic part is integrally formed with the metallic circuit by injection molding.
In an embodiment, the second plastic part is integrally formed with the metallic circuit by injection molding.
In an embodiment, the metallic circuit is stamped from a plate material.
In an embodiment, the electronic component and the metallic circuit are welded by Surface Mount Technology (SMT).
The present disclosure further provides a voice coil motor including the above-mentioned base with the electronic component, and the electronic component is a Hall element.
In the base with the electronic component provided by the present disclosure, the FPC is replaced by the metallic circuit, so that there is no need to produce FPC, which simplifies the production process of the base and reduces the material cost.
1. electronic component; 2. metallic circuit; 3. first plastic part; 4. second plastic part; 5. sheet material;
21. branch circuit; 31. limiting block; 51. positioning hole.
The solutions of the present disclosure will be described below in conjunction with the drawings and specific embodiments.
The present embodiment relates to a base with an electronic component. As shown in
In the present embodiment, the metallic circuit 2 is connected to the electronic component 1. As shown in
In the present embodiment, the metallic circuit 2 includes a metal substrate and a protective layer. The plurality of branch circuits 21 are made of the metal substrate, and the protective layer covers an outer surface of the metal substrate.
The metal substrate is made of materials such as copper or stainless steel, etc. The thickness of the metal substrate ranges from 0.05 mm to 0.2 mm, for example, it can be selected as 0.06 mm, 0.08 mm, 0.10 mm, 0.11 mm, 0.13 mm, 0.15 mm, 0.16 mm, 0.18 mm or 0.19 mm. The metal base material is stamped from a plate material, and the stamping forming is simple and has high production efficiency. In addition to forming the metal substrate by the stamping forming, other process such as wire cutting can also be adaptively adopted, which are all within the scope of implementation of the present embodiment.
The protective layer includes an anti-oxidation layer and a flux layer that covers an outside of the anti-oxidation layer. The anti-oxidation layer is a nickel layer that prevents the metallic circuit 2 from being oxidized, so as to ensure the service life of the metallic circuit 2. The nickel layer is formed by electroplating. In other embodiments, the metal substrate can be protected by plating other anti-oxidation metals, which can be specifically selected based on actual conditions. At the same time, other surface treatment methods for forming the anti-oxidation layer can also be selected.
The flux layer is a gold layer, a tin layer, or a combination of the gold layer and the tin layer, which is beneficial to improve the welding quality of the electronic component 1 and the metallic circuit 2 when welding. The flux layer is formed by electroplating. Of course, other surface treatment methods for forming the anti-oxidation layer can also be selected.
As shown in
Since each branch circuit 21 of the metallic circuit 2 is connected to the electronic component 1, in the case of the small size of the electronic component 1, the distance between adjacent branch circuits 21 is small, and the limiting blocks 31 corresponding to different branch circuits 21 can be shared or connected as a whole, thereby enhancing the effect of stably supporting the branch circuit 21 and ensuring the stability of the metallic circuit 2.
As shown in
In the present embodiment, the first plastic part 3 and the second plastic part 4 are integrally formed with the metallic circuit 2 by injection molding. There is no need to produce the metallic circuit 2, the first plastic part 3, and the second plastic part 4 individually, and there is no need to perform an assembly process afterwards, thereby simplifying the assembly process and improving the production efficiency of the base.
In the base with the electronic component of the present embodiment, FPC is replaced by the metallic circuit 2, so that there is no need to produce FPC, which simplifies the production process of the base and reduces the material cost. At the same time, in order to ensure the stability of the metallic circuit 2 during the production process of the base, all the branch circuits 21 of the metallic circuit 2 are connected through the first plastic part 3 to realize the connection and reinforcement of the plurality of branch circuits 21 of the metallic circuit 2, thereby obtaining the base with high quality.
The electronic component 1 and the metallic circuit 2 are welded by SMT, which can improve the welding efficiency.
The present embodiment further relates to a voice coil motor including the above-mentioned base with the electronic component, and the electronic component 1 is a Hall element. The production process and the cost of the base with the electronic component are simplified and reduced, respectively, so that it is beneficial to simplify the assembly process of the voice coil motor and improve the production efficiency of the voice coil motor.
The present embodiment further relates to a production process of a base with an electronic component, as shown in
S10, a long-strip shaped sheet material 5 is stamped into a plurality of interconnected metal substrates with a preset shape, and a reel packaging is performed.
In a traditional spot-tin welding process, the electronic component 1 is welding to the FPC by spot welding. Therefore, it is necessary to perform repeated positioning for each FPC, and it has a high requirement for the accuracy of the repeated positioning for the FPC. In the actual production process, the accuracy of each positioning cannot be fully guaranteed. At the same time, FPC itself has geometric tolerances. Based on the above situation, the overall defect rate of the base produced by the assembly process is high, and welding after positioning one by one leads to a low production efficiency and a poor mass production.
In step S10, by stamping a plurality of interconnected metal substrates on the long-strip shaped sheet material 5, a continuous production or mass production can be realized in subsequent multiple steps, which is beneficial to improve production efficiency. As shown in
In the present embodiment, the long-strip shaped sheet material 5 is made of materials such as copper or stainless steel, etc. In other embodiments, according to specific conditions, the long-strip shaped sheet material 5 may also be selected as a long-strip shaped sheet material of other metals or alloys, as long as it capable of conducting electricity and being welded to the electronic component 1. The thickness of the long-strip shaped sheet material ranges from 0.05 mm to 0.2 mm, for example, it can be selected as 0.06 mm, 0.08 mm, 0.10 mm, 0.11 mm, 0.13 mm, 0.15 mm, 0.16 mm, 0.18 mm or 0.19 mm.
The metal substrate is treated by the reel packaging. When processing in the next step, the reel can be driven to rotate by an automatic traction device or a feeding device, which is beneficial to realize automatic feeding.
S20, an anti-oxidation layer is plated on the surface of the metal substrate.
In an embodiment, the anti-oxidation layer is formed by plating nickel to prevent the metallic circuit 2 from being oxidized, so as to ensure the service life of the metallic circuit 2. In other embodiments, the metal substrate can be protected by plating other anti-oxidation metals, which can be specifically selected based on actual conditions; at the same time, other surface treatment methods for forming the anti-oxidation layer can also be selected.
S30, a flux layer is plated outside the anti-oxidation layer to form a plurality of continuous metallic circuits 2 and the reel packaging is performed.
In an embodiment, the flux layer is formed by plating gold or tin outside the anti-oxidation layer, or by plating both gold and tin to achieve a better flux effect. The flux layer facilitates the welding process, so that it can improve the welding quality when the metallic circuit 2 and the electronic component 1 are welded to each other.
The formed metallic circuit 2 is treated by the reel packaging. When processing in the next step, the reel can be driven to rotate by an automatic traction device or a feeding device, which is beneficial to realize automatic feeding.
S40, the first plastic part is formed by the injection molding on a position on the metallic circuit 2 where the electronic component 1 is connected, so as to form a first semi-finished product, as shown in
In an embodiment, when performing the injection molding, the injection temperature ranges from 250 degrees Celsius (° C.) to 390 degrees Celsius (° C.), for example, it can be selected as 260° C., 270° C., 280° C., 290° C., 300° C., 310° C., 320° C., 330° C., 340° C., 350° C., 360° C., 370° C. or 380° C. The injection time ranges from 5 seconds (s) to 15 seconds (s), for example, it can be selected as 6 s, 7 s, 8 s, 9 s, 10 s, 11 s, 12 s, 13 s or 14 s.
S50, the electronic component 1 is welded to the first semi-finished product by SMT process to form a second semi-finished product, as shown in
In an embodiment, the welding temperature of the SMT process ranges from 150° C. to 350° C., for example, it can be selected as 160° C., 170° C., 180ºC, 190° C., 200° C., 210° C., 220° C., 230° C., 240° C., 250° C., 260° C., 270° C., 280° C., 290° C., 300° C., 310° C., 320° C., 330° C., 340° C. or 350° C.
S60, the metallic circuit 2 in the second semi-finished product is cut, as shown in
S70, the metallic circuit 2 in the second semi-finished product after cutting is bent.
In an embodiment, at the position marked with dotted lines in
S80, the second plastic part 4 is formed by injection molding on the second semi-finished product after bending to form a plurality of interconnected bases.
The injection temperature ranges from 250° C. to 390° C., for example, it can be selected as 260° C., 270° C., 280° C., 290° C., 300° C., 310° C., 320° C., 330° C., 340° C., 350° C., 360° C., 370° C. or 380° C. The injection time ranges from 5 s to 15 s, for example, it can be selected as 6 s, 7 s, 8 s, 9 s, 10 s, 11 s, 12 s, 13 s or 14 s.
S90, the plurality of interconnected bases are cut to form single bases, as shown in
In an embodiment, this step includes cutting a material band of the long-strip shaped sheet material 5 connected to the plurality of bases, and further includes cutting off connecting parts in each metallic circuit connected to the different branch circuits 21. A cutting machine used in this step has functions of cutting off the material band and cavity dividing, which can cut a plurality of interconnected bases into a plurality of single bases at one time, thereby improving the work efficiency.
Number | Date | Country | Kind |
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201811114105.4 | Sep 2018 | CN | national |
This application is a divisional application of U.S. patent application Ser. No. 17/276,726, filed on Jun. 12, 2019, which claims priority to Chinese Patent Application No. 201811114105.4, filed on Sep. 25, 2018, the content of which is incorporated herein by reference in its entirety.
Number | Date | Country | |
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Parent | 17276726 | Mar 2021 | US |
Child | 18642056 | US |