Optical Module Ball Bearing Protrusion for Smooth Rotation
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Solution Overview
Problem
Existing camera modules with reflective modules experience deviations in force application during rotation, leading to non-smooth rotational movement and potential image stabilization issues.
Innovation Solution
An optical module design featuring a housing, a guide member, an optical member, and a first ball member with a plurality of balls that roll on a protrusion, ensuring consistent contact and smooth rotation, while also incorporating magnets and coils for rotational control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a plurality of balls are used to support rotational movement of the reflective module, then rotational movement is enabled, but force deviation occurs during rotation leading to non-smooth movement
Solution Approach 1:
The patent introduces a protrusion with a curved surface (specifically a truncated cone shape) that the balls roll against during rotation. This curved surface ensures consistent contact and force distribution throughout the rotational movement, eliminating the force deviation that occurs with flat contact surfaces. The spherical balls rolling on the curved protrusion surface maintain uniform pressure and smooth rotational motion.
2Stability of the object's composition
If balls are in contact with both reflective module and housing, then rotational support is provided, but contact force deviation occurs during rotation
Solution Approach 1:
The patent changes the geometric parameters of the contact surface by introducing a protrusion with a specific curved profile (truncated cone shape). This parameter change in the contact surface geometry transforms the interaction from flat-to-flat contact to spherical-rolling-contact, ensuring that the contact point continuously adapts to maintain consistent force application throughout the rotation, thereby improving both stability and smoothness.
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 optical module achieves improved optical image stabilization by maintaining consistent force application and smooth rotational movement, enhancing the overall performance of camera modules.
Implementation Method 1
the plurality of balls of the first ball member are configured to roll while being in contact with an outer surface of the protrusion
Implementation Method 2
incorporating magnets and coils for rotational control
Data Source
AI summary
An optical module includes a housing; a guide member disposed in the housing and configured to be rotatable about a first rotational axis; an optical member configured to be rotatable about the first rotational axis together with the guide member; a first ball member disposed between the housing and the guide member and including a plurality of balls; and a protrusion disposed on the housing or the guide member and protruding in a direction of the first rotational axis, wherein the plurality of balls of the first ball member are configured to roll while being in contact with an outer surface of the protrusion.