Three-axis voice coil motor for controlling camera movement

Abstract

The invention discloses a three-axis voice coil motor for controlling camera movement. The three-axis voice coil motor comprises a casing formed by a bottom cover and a magnet yoke, a camera base arranged in the casing, at least two translation coils arranged on the periphery of the camera base and at least one spring sheet connected with the end of the camera base and the end of the casing. One end of the camera base is sleeved with a focusing coil, and the inner wall of the magnetic yoke is provided with a magnet interacting with the translation coil and the focusing coil. The three-axis voice coil motor for controlling camera movement is simple in structure, capable of achieving the anti-vibration function of a camera, easy to match with a drive circuit, suitable for various cell phones and favorable for mass production.

Description

technical field [0001] The invention relates to a motor device, in particular to a voice coil motor capable of controlling lens movement. Background technique [0002] With the popularization of smart phones, people have higher and higher requirements for the functions of smart phones. For example, many users hope that the smart phones they carry around all the time can take perfect photos just like digital cameras. However, digital cameras that can achieve optical image stabilization (OIS) and tilt-shift photography require a relatively complex mechanical structure to control the multi-dimensional movement of the lens. Although smartphone manufacturers have also been committed to research and development in this area, TDK, Mistumi, Foxconn, as representatives, have developed a voice coil motor (VCM) with OIS function, but the voice coil motors produced by the above-mentioned manufacturers have their own shortcomings, for example, it is difficult to mass produce, and it is n...

AI Technical Summary

Problems solved by technology

However, digital cameras that can achieve optical image stabilization (OIS) and tilt-shift photography require a relatively complex mechanical structure to control the multi-dimensional movement of the lens. Although smartphone manufacturers have also been committed to research and development in this area, TDK, Mistumi, Foxconn, as representatives, have developed a voice coil motor (VCM) with OIS function, but the voice coil motors produced by the above-mentioned manufacturers have their own shortcomings, for example, it is difficult to mass produce, and it is not easy to match the motor drive circuit. High power consumption, slightly larger volume, etc.

[0003] For example, on the basis of the existing auto-focus motor, the OIS VCM produced by some manufacturers adds a corresponding drive structure to the outer four sides of the structure to realize the OIS function, resulting in the overall size of the OIS VCM reaching about 10mmx10mm. Larger, unable to comply with the trend of ultra-light and ultra-thin smartphones, so most mobile phones cannot be equipped with this kind of autofocus motor

[0004] Moreover, due to its principle, the existing OIS VCM is driven by multiple sets of motors, and the corresponding parts cannot be shared, resulting in a large number of parts. For example, the number of magnets needs to be 6-8 pieces, and the number of springs (coil springs) needs to be 4-6. One, the structure is complicated, the assembly process is also more troublesome and time-consuming, and the overall production cost is higher

[0005] Furthermore, the existing OIS VCM generally uses 3 sets of coils to be controlled separately, and its pins are generally 6 or more, so the required control chip is relatively demanding, the control process is complicated, and the control cost is high

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