Magnetic Sensor Position Adjustment via Lid Body Threaded Hole
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Solution Overview
Problem
Conventional magnetic field detection devices cannot adjust the position of a magnetic sensor after being attached to an existing device, limiting flexibility in aligning the sensor with a magnet.
Innovation Solution
A magnetic field detection device with a lid body that includes a position adjuster, allowing the magnetic sensor to be moved to change the facing distance with the magnet, enabling adjustment even after attachment to an existing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the magnetic sensor is fixed on the housing, then the device structure is simple, but the sensor position cannot be adjusted after attachment
Solution Approach 1:
The lid body is designed with a threaded hole that allows the magnetic sensor to be positioned at different distances from the magnet by adjusting the depth of engagement. This dynamic adjustment capability enables the sensor position to be optimized after device attachment, resolving the contradiction between fixed simple structure and adjustable adaptability
Solution Approach 2:
The lid body is segmented into distinct functional portions: a first portion that covers the opening and a second portion that holds the magnetic sensor. This segmentation allows independent adjustment of the sensor position relative to the magnet while maintaining the overall structural integrity of the lid body
2Measurement precision
If the distance between magnet and magnetic sensor is fixed, then manufacturing is easier, but detection accuracy cannot be optimized for existing devices
Solution Approach 1:
The lid body is pre-designed with a threaded hole at a specific location that allows for preliminary positioning of the magnetic sensor. This preliminary structural preparation enables easy adjustment of the sensor-magnet distance during installation without requiring complex manufacturing processes
Solution Approach 2:
The distance parameter between the magnetic sensor and magnet can be changed by adjusting the position of the magnetic sensor along the threaded hole. This parameter adjustment capability allows optimization of detection accuracy for different existing devices without changing the fundamental manufacturing process
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
Enables precise adjustment of the magnetic sensor's position relative to the magnet, ensuring accurate detection of magnetic field changes, even in existing devices with manufacturing or mounting errors.
Implementation Method 1
a magnetic sensor disposed on the lid body at a position facing the magnet and being apart from the magnet, and configured to detect a change in a magnetic field caused by rotation of the magnet
Data Source
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Figure 2B
AI summary
To provide a magnetic field detection device capable of adjusting a position of a magnetic sensor even after being attached to an existing device. The magnetic field detection device includes: a lid body (110) that covers an opening (11A) of a housing(11), the housing having the opening and a space (11B) communicating with the opening; a magnet (130) disposed in the space and rotatable in the same plane as the opening in plan view; and a magnetic sensor (150) disposed on the lid body at a position facing the magnet and being apart from the magnet, and configured to detect a change in a magnetic field caused by rotation of the magnet. The lid body includes a position adjuster (112) capable of moving the magnetic sensor so as to change a facing distance (D) between the magnetic sensor and the magnet.