A voice coil motor (VCM) autofocus module typically uses a return spring so that when current is reduced or cut, the lens moves back toward a rest position.
NOT BSTOTAL BS
NOT BS — Verdict: True
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The Short Version
The claim matches how most mainstream VCM autofocus modules are designed. Technical sources describe the lens carrier as suspended by springs or flexures, with position set by the balance between magnetic drive force and restoring force. When current is reduced or removed, the lens typically returns toward a default rest or park position, though some less common VCM variants behave differently.
Caveats
“Return spring” often means flexures, leaf springs, or suspension springs—not necessarily a separate coil spring part.
Some VCM autofocus designs, such as certain guided or ball-bearing variants, may not show the same strong self-return behavior and can require hold current.
The exact zero-current rest position can vary by module design, orientation, friction, and mechanical stops.