Hall Sensor Mounting Structure for Lens Shake Correction Alignment
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Solution Overview
Problem
Existing optical vibration-proof devices face challenges in accurately and reliably attaching magnetic sensors for lens shake correction due to issues such as misregistration caused by impact or aging.
Innovation Solution
The optical vibration-proof device incorporates a base member with a positioning part that integrates a sensor attachment member, allowing the magnetic sensor to be securely attached without misregistration, using a flexible print substrate and sensor attachment members with elastic parts to ensure precise positioning and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the magnetic sensor is attached to the base member using a flexible substrate, then the attachment process is simplified, but misregistration may occur due to impact or aging
Solution Approach 1:
The base member is divided into two functional parts: a positioning part that provides precise positioning through contact with the magnetic sensor, and a sensor attachment member that secures the flexible substrate. This segmentation allows the positioning function to be isolated from the attachment function, preventing misregistration while maintaining ease of manufacture.
Solution Approach 2:
The positioning part acts as an intermediary element between the magnetic sensor and the base member structure. It provides a dedicated contact surface that ensures accurate positioning without requiring the entire base member to be complex, thus resolving the contradiction between simplicity and precision.
2Device complexity
If the positioning part is integrally formed with the base member, then structural complexity is reduced, but the sensor attachment member loses positioning capability
Solution Approach 1:
The base member is segmented into a positioning part and a sensor attachment member, even though they are integrally formed. This segmentation allows the positioning part to maintain its integral formation for simplicity while the sensor attachment member provides dedicated positioning capability through its separate functional design.
Solution Approach 2:
The sensor attachment member serves multiple functions: it attaches the flexible substrate to the base member and simultaneously provides positioning through its contact with the positioning part. This multi-functionality allows the structure to remain simple while maintaining positioning accuracy.
3Manufacturing precision
If the magnetic sensor is securely fixed to prevent misregistration, then positioning accuracy is improved, but the attachment process becomes more complex
Solution Approach 1:
The attachment process is segmented into two independent steps: first, the flexible substrate is attached to the sensor attachment member; second, the sensor attachment member is positioned and secured to the base member. This segmentation allows each step to be simple while achieving secure fixation and positioning accuracy overall.
Solution Approach 2:
The positioning part is designed to automatically provide positioning when the sensor attachment member is installed. The contact between the positioning part and the magnetic sensor self-aligns the sensor, eliminating the need for complex alignment procedures or additional positioning mechanisms.
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 method enables simple, accurate, and reliable attachment of magnetic sensors, preventing misregistration and ensuring effective shake correction in optical devices.
Implementation Method 1
a magnetic material that is moved integrally with the lens holding frame and generates a magnetic field, a magnetic sensor that detects a change in the magnetic field in accordance with movement of the lens holding frame
Implementation Method 2
a hall element that detects a change in a magnetic field of a magnet provided in the lens holding frame
Implementation Method 3
the sensor attachment member has an elastic part, and biases the magnetic sensor by an elastic force generated in the elastic part to bring the magnetic sensor into contact with the positioning part
Data Source
AI summary
Optical vibration-proof device, optical device, and fixing method for attaching a magnetic sensor that detects a position of a lens for shake correction to a base member. An optical vibration-proof device including a base member, a lens holding frame configured to be movable, a magnetic material that is moved integrally with the lens holding frame and generates a magnetic field, a position detection hall element that detects a change in the magnetic field in accordance with movement of the lens holding frame, and a sensor attachment member fixed to the base member. The base member includes a positioning part. The sensor attachment member brings the position detection hall element into contact with the positioning part to position the position detection hall element. The base member is formed integrally with the positioning part as a same member and is formed as a separate member from the sensor attachment member.