Optical Element Driving Mechanism with Overlapping Sensing Assembly
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Solution Overview
Problem
Electronic products face challenges in reducing volume and protecting internal components from damage due to collisions, as existing mechanisms do not effectively utilize space and safeguard against component collisions.
Innovation Solution
A driving mechanism for optical elements that includes a holding unit, base unit, elastic element, and sensing assembly, where the elastic element and sensing assembly overlap in the optical axis direction, utilizing magnetic field sensing and a housing with extending portions to minimize size and protect components, and a frame with a stopping portion to prevent circuit board damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the interior space is utilized more effectively to reduce volume, then the overall volume of the electronic product is reduced, but the risk of component damage due to collision increases
Solution Approach 1:
The sensing assembly is nested within the space between the elastic element and the base unit, with the sensing magnet positioned on the elastic element and the magnetic field sensing element positioned on the base unit. This nesting arrangement allows the sensing function to be integrated into the existing structural space without increasing the overall volume of the driving mechanism, while still providing collision detection capability to protect against component damage.
2Volume of moving object
If the elastic element and sensing assembly are positioned to overlap in the optical axis direction, then the volume is minimized, but the complexity of arranging components increases
Solution Approach 1:
The elastic element serves dual functions: it provides the driving force for optical element movement and carries the sensing magnet for collision detection. Similarly, the base unit serves as both the mounting structure and the location for the magnetic field sensing element. This multi-functionality reduces the need for separate dedicated components, simplifying the overall arrangement while achieving compact volume through overlapping positioning in the optical axis direction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism achieves miniaturization and protects electronic components by overlapping the elastic and sensing assemblies, reducing volume and preventing damage from collisions, while maintaining accurate displacement detection and auto-focusing functionality.
Implementation Method 1
the sensing assembly further includes a magnetic field sensing element disposed on the base unit, and a sensing magnet disposed on the holding unit
Data Source
AI summary
A driving mechanism is provided and configured to drive an optical element. The driving mechanism includes a base unit, a holding unit, a driving assembly, a sensing assembly, and a first circuit component. The holding unit is configured to hold an optical element that has an optical axis. The driving assembly is configured to drive the optical element to move relative to the base unit. The sensing assembly is configured to detect the movement of the holding unit relative to the base unit. The first circuit component is disposed in the base unit and electrically connected to the sensing assembly, wherein the first circuit component extends in a direction that is substantially parallel to the optical axis.