Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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TECH

The Claim

A voice coil motor (VCM) used for smartphone autofocus has no gears and no friction.

Verified by Lenz ·

The Short Version

Smartphone autofocus VCMs are generally gearless, but they are not frictionless. Stronger technical sources describe direct electromagnetic motion alongside real mechanical suspensions, guides, springs, or contact surfaces where friction and wear must be managed. The claim overstates a true feature of VCMs and turns it into an inaccurate absolute.

Caveats

  • "No gears" does not mean "no friction"; friction can arise from guides, springs, rails, and other contact interfaces.
  • The phrase "no friction" is an absolute claim and is contradicted by engineering descriptions of smartphone camera module design.
  • Some promotional or simplified explanations overstate VCM smoothness and omit the mechanical parts that introduce friction and wear.

The Receipts

  1. Design of VCM actuator with L-shape coil for smartphone cameras

    ADS (Harvard & Smithsonian)

  2. A mobile auto-focus actuator based on a rotary VCM with the zero holding current

    PubMed

  3. Voice coil motor (VCM) optical image stabilization (OIS) actuator module

    Google Patents

  4. Liquid lens Autofocus vs Voice Coil Motor (VCM) Autofocus

    e-con Systems

  5. Zero Hold Power with SMA: Power-saving technology for variable aperture

    Cambridge Mechatronics Ltd.

  6. What is a VCM? Photography terms explained - EOS magazine

    EOS magazine

  7. Optical Image Stabilization with Miniature Actuators

    NMB Technologies

  8. Silky Swift Voice Coil Motor (VCM) | DPReview Forums

    DPReview Forums

  9. VCM spring

    United Precision Technologies Co., Ltd.

  10. Voice Coil Motor M12 Lens Mount with 23.5mm hole spacing

    Commonlands

+ 13 more sources — see the full list on Lenz

Filed Under

Smartphone AutofocusVoice Coil Motor

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