Magnetic Field Generator Positioning via Guide Opening and Rod Member
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Solution Overview
Problem
In anti-shaking apparatuses for photographing devices, accurately positioning magnetic field generators relative to magnetic field sensors is challenging, especially when multiple hall elements are involved, leading to suboptimal detection capabilities.
Innovation Solution
A position detecting device with a movable unit, a hold unit, a magnetic field generator, a magnetic field sensor, a guide portion, and an engaged portion, where the magnetic field generator is slid along a guide opening and fixed using a rod member to ensure accurate positioning, allowing the magnetic field sensor to detect the position of the movable unit relative to the hold unit effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the movable unit and hold unit are built into one body unit after mounting hall elements and magnets, then assembly is simplified, but it becomes difficult to dispose the hall element so that it faces the center position of the magnet
Solution Approach 1:
The device is divided into separate movable unit and hold unit that can be assembled together. The guide portion with guide opening and engaged portion allows the magnetic field generator to be positioned independently on the movable unit relative to the magnetic field sensor on the hold unit, enabling precise positioning while maintaining assembly simplicity.
Solution Approach 2:
The guide portion acts as an intermediary mechanism between the movable unit and hold unit. The guide opening and engaged portion provide a reference structure that mediates the positioning relationship between the magnetic field generator and magnetic field sensor, ensuring accurate alignment during assembly.
2Measurement precision
If multiple hall elements are provided in the movable unit, then detection capability is enhanced, but it becomes even more difficult to dispose each hall element to face the center position of the magnet
Solution Approach 1:
Each magnetic field generator (magnet) is equipped with its own guide portion featuring a guide opening, and each engaged portion is positioned correspondingly. This segmented approach allows each hall element-magnet pair to be independently aligned using its dedicated guide structure, maintaining high positioning accuracy even when multiple elements are present.
Solution Approach 2:
The guide portion with guide opening and engaged portion is pre-formed on the movable unit before assembly with the hold unit. This preliminary preparation of positioning features ensures that when multiple magnetic field generators and hall elements are assembled, each pair can be quickly and accurately aligned without complex adjustment procedures.
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 ensures that the magnetic field generator is accurately positioned, enhancing the detection capability of the magnetic field sensor and improving the anti-shaking mechanism's effectiveness in reducing image blur.
Implementation Method 1
The magnetic field generator is provided on the first surface and generates a magnetic field
Implementation Method 2
The hall element detects the position of the movable unit based on the magnetic flux density generated by the magnet
Data Source
AI summary
A position detecting device has a movable unit, and a hold unit that movably holds the movable unit. One of the movable unit and the hold unit has a magnetic field generator having an engaged portion and a guide opening. A magnetic field sensor is provided on the other unit of the movable unit and hold unit. The sensor senses the magnetic field so as to detect the position of the movable unit relative to the hold unit. The magnetic field generator is fixed to the first surface after the magnetic field generator is slidingly moved by a rod member inserted into the guide opening and engaged with the engaged portion so as to dispose the magnetic field generator at a predetermined position.