Voice coil motor and manufacturing method thereof

Abstract

The invention discloses a voice coil motor and a manufacturing method thereof. The manufacturing method of the voice coil motor comprises the steps of providing winding parts, wherein each winding part comprises a support body, and winding columns are arranged on the support body; providing a lower spring, wherein the lower spring comprises at least two spring bodies, and the third connecting position and the fourth connecting position of the support body are electrically connected with different spring bodies of the lower spring respectively; setting a coil on the winding columns of the support body, and enabling the two ends of the coil to be electrically connected with the first connecting position and the second connecting position of the support body respectively; and forming a carrier in an injection molding manner. According to the voice coil motor and the manufacturing method thereof, the coil is electrically connected with the winding parts, and then the winding parts are electrically connected with the lower spring, so that conduction connection between the coil and the lower spring is realized, removal of a varnished wire of the coil is not needed, wire end arrangement by the working staff is avoided, production efficiency is improved and cost is lowered, the problem of exposure of a welding point is avoided, long lasting and firmness of the welding point can be ensured, process difficulty is lowered, and consumption of glue consumable material caused by rubber coating processing can be avoided.

Description

technical field [0001] The invention relates to the field of camera technology, in particular to a method for manufacturing a voice coil motor and the voice coil motor. Background technique [0002] Along with the progress of science and technology, the application of camera is more and more extensive, at present, except camera, mobile phone, computer and other electronic products are all equipped with camera, to facilitate people to take pictures anytime and anywhere, to bring convenience and fun to people's life. [0003] At present, in the production of auto-focus voice coil motors, the carrier and the lower spring are generally formed first, and then the coil is wound on the carrier, and then the end of the coil is electrically connected to the Lower the spring leaf and fix the lower spring leaf. However, this production method has the following problems: [0004] First, when the coil is electrically connected to the lower spring, the surface of the coil has an insulat...

AI Technical Summary

Problems solved by technology

[0004] First, when the coil is electrically connected to the lower spring, the surface of the coil has an insulating enamel coating, which requires the winding supplier to remove the enamel coating, or the voice coil motor factory arranges labor or equipment removal by itself, which will increase the cost and process. If If it is manual removal, it will have higher requirements for operators, and it is more difficult to train personnel

Solder paste soldering is required after removing the enamelled layer, which increases the solder paste and increases the cost of raw materials

Moreover, after adding solder paste, it also increases the huge risk of foreign matter generated by the flux, which leads to the need to add liquid medicine for cleaning in the subsequent process

Some manufacturers use the resistance welding method, which also requires the size of the carrier pad, which makes it difficult to miniaturize the motor

[0005] Second, if the coil and the lower spring are welded without removing the enamelled layer, and other welding methods are used, the staff will need to tidy up the thread ends, resulting in increased labor costs. Staff resignation will lead to a significant drop in production line yield and efficiency

[0006] Thirdly, the solder joints between the coil and the lower spring are leaking. The current process requires encapsulation, otherwise there will be foreign matter problems. At the same time, the solder joints cannot be guaranteed to be stable for a long time, which increases the difficulty of the process and increases the consumption of glue consumables.

[0007] Fourth, the line between the welding point of the coil and the lower spring and the coil body is very easy to disconnect during the reliability test, resulting in a bad open circuit of the voice coil motor

[0008] Fifth, the connection between the lower spring piece and the carrier also requires glue bonding, or hot riveting, or glue and hot riveting at the same time, which increases the complexity of the process and increases the cost of glue consumption

[0009] Sixth, the traditional production process requires a large number of fixtures, which also results in higher costs

[0010] Seventh, the traditional process is that the carrier is first injection molded, and then the coil is wound on the carrier, which will cause a drastic change in torque, which has higher requirements for carrier molding manufacturers and winding manufacturers

At the same time, it also increases the difficulty of control for VCM autofocus motor manufacturers

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