Endoscope Optical Unit Voice Coil Motor Nesting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing endoscope optical units face challenges in reducing size and weight while maintaining efficient movement and zoom functionality, particularly in using voice coil motors for movable parts.
Innovation Solution
The optical unit incorporates a tubular fixed part with a voice coil motor and magnetically polarized movable part, where the movable part is positioned within the front or back frame parts, allowing for reduced size and weight by optimizing the placement of coils and magnets, and ensuring stable magnetic fields for efficient movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the movable part is positioned within the front or back frame parts to reduce size and weight, then the size and weight of the optical unit are reduced, but the magnetic field stability may be compromised
Solution Approach 1:
The movable part is positioned within the front or back frame parts, nesting the voice coil motor components inside the existing structural framework. This nesting arrangement reduces the overall size and weight of the optical unit while maintaining the magnetic field stability through proper spatial configuration of the coil and magnet assemblies within the confined space.
Solution Approach 2:
The magnetic polarization direction is specifically configured to be orthogonal to the optical axis, creating localized magnetic field characteristics that enable efficient linear actuation. The coil and magnet are positioned to generate a stable magnetic field in the specific region where the movable part operates, ensuring field stability despite the compact arrangement.
2Power
If the voice coil motor uses a coil in the fixed part and magnet in the movable part with orthogonal magnetic polarization, then the driving efficiency is enhanced, but the device complexity increases
Solution Approach 1:
The voice coil motor replaces traditional mechanical transmission mechanisms (gears, belts, linkages) with an electromagnetic actuation system. The coil and magnet assembly directly converts electrical energy to linear motion, eliminating the need for intermediate mechanical components and reducing overall device complexity despite the specialized magnetic configuration.
Solution Approach 2:
The voice coil motor assembly serves multiple functions: it provides precise linear actuation for the movable part, enables rapid positioning for quick zoom changes, and integrates within the compact optical unit structure. The orthogonal magnetic polarization configuration allows the same component arrangement to achieve both efficient driving and compact integration.
3Speed
If the movable part is rapidly repositioned for quick zoom changes, then the zoom response speed is improved, but the positioning precision may be affected
Solution Approach 1:
The voice coil motor provides dynamic control of the movable part position, enabling rapid acceleration and deceleration for quick zoom changes. The electromagnetic actuation system can be precisely controlled to achieve fast response while maintaining positioning accuracy through controlled deceleration and positioning algorithms.
Solution Approach 2:
The optical unit incorporates position detection mechanisms that provide feedback on the movable part location. This feedback enables closed-loop control of the voice coil motor, ensuring that rapid movements result in accurate positioning at the target zoom positions, thereby maintaining positioning precision despite high-speed operation.
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
This configuration enables rapid and unerring movement of the movable part, reducing the size and weight of the optical unit while enhancing driving efficiency and compatibility with quick zoom changes and image capture.
Implementation Method 1
a voice coil motor that is capable of moving the movable part relatively with respect to the fixed part in a direction of the axis by a coil located in the fixed part and a magnet located in the movable part and magnetically polarized in a direction orthogonal to the axis
Data Source
AI summary
The optical unit is including a tubular fixed part, a front frame part, a back frame part, a movable part, and a voice coil motor that is capable of moving the movable part relatively with respect to the fixed part in a direction of the axis by a coil located in the fixed part and a magnet located in the movable part and magnetically polarized in a direction orthogonal to the axis, wherein at least a part of the movable part is included in a portion of the front frame part projected in the axis direction.