Lens Barrel Shield Plate Magnetic Flux Leakage
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Solution Overview
Problem
In imaging devices, the close proximity of actuators leads to magnetic flux leakage, which can cause malfunctions in adjacent actuators, affecting the performance of image blurring correction and shutter devices.
Innovation Solution
The lens barrel design incorporates a shield plate with a main body and protrusion to absorb magnetic flux, positioning the main body between the actuator and magnet, and the protrusion to intercept lines of magnetic force from both poles, reducing magnetic flux leakage between actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If actuators are disposed close together to make the imaging device more compact, then the device size is reduced, but magnetic flux leakage from one actuator affects other actuators causing malfunction
Solution Approach 1:
A shield plate is introduced as an intermediary component between actuators to block magnetic flux leakage. The shield plate is positioned between the first actuator and the second actuator, creating a magnetic barrier that prevents harmful magnetic fields from affecting adjacent actuators while allowing the actuators to remain in close proximity for compact device design.
Solution Approach 2:
The harmful magnetic flux is extracted and redirected away from adjacent actuators using the shield plate. The shield plate captures the leaking magnetic flux lines and channels them through designated paths, preventing the magnetic flux from interfering with the operation of nearby actuators.
2Area of stationary object
If actuators are disposed close together, then space utilization is improved, but magnetic flux leakage causes harmful effects on adjacent actuators
Solution Approach 1:
The shield plate serves as a magnetic intermediary that blocks and redirects magnetic flux lines. It is strategically positioned between actuators to intercept harmful magnetic flux while allowing the actuators to maintain close spacing for efficient space utilization.
Solution Approach 2:
The shield plate converts the harmful magnetic flux leakage into a controlled magnetic path. By providing a dedicated magnetic return path through the shield plate, the previously harmful leaked flux is transformed into a controlled magnetic circuit that does not interfere with adjacent actuators.
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 effectively minimizes the impact of magnetic flux leakage on adjacent actuators, ensuring reliable operation of image blurring correction and shutter devices even when actuators are closely disposed, thereby enhancing the overall performance and compactness of the imaging device.
Implementation Method 1
The shield plate includes a main body that is provided between the actuator and the magnet and is disposed at a position that is opposite the magnet, and a protrusion that protrudes from the main body. The main body is provided at a position through which pass lines of magnetic force generated from the first magnetic pole, out of the lines of magnetic force produced from the actuator when the actuator is driven. The protrusion is provided at a position through which pass lines of magnetic force generated from the second magnetic pole, out of the lines of magnetic force produced from the actuator.
Data Source
AI summary
A lens barrel (1) comprises an actuator (430), and an image blurring correction device (500) provided near the actuator (430). The image blurring correction device (500) has a magnetic sensor (524), a magnet (515), and a shield plate (514). The shield plate (514) comprises a main body (514a) that is opposite the magnet (515), and a protrusion (514b) that protrudes from the main body (514a). The main body (514a) is provided at a position through which pass lines of magnetic force generated from a first magnetic pole, out of the lines of magnetic force produced from the actuator (430). The protrusion (514b) is provided at a position through which pass lines of magnetic force generated from a second magnetic pole, out of the lines of magnetic force produced from the actuator (430).