Hall Effect Liquid Level Sensor Resinous Holder Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid level detecting devices face challenges in reducing size due to the use of lead wires and common capacitors and resistors, which are difficult to integrate without mechanical damage under high molding pressure.
Innovation Solution
A compact liquid level detecting device design incorporating a hall IC, chip capacitors, and a resinous holder that protects the electronic circuit from heat and mechanical stress, with a terminal member and chip mounts integrated into a mold body to form a detecting unit covered in resinous material, preventing damage from molding pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If chip capacitors are used to reduce device size, then the device size is reduced, but the chip capacitors are damaged by high molding pressure
Solution Approach 1:
A resinous holder is provided that protects the chip capacitors from molding pressure before the actual molding process occurs. The holder acts as a cushioning structure that absorbs and distributes the high molding pressure, preventing direct transmission of force to the fragile chip capacitors while still allowing for compact device integration.
Solution Approach 2:
The resinous holder serves as an intermediary between the molding process and the chip capacitors. It mediates the interaction by providing a protective interface that allows the molding pressure to be applied to the holder rather than directly to the chip capacitors, thus enabling size reduction while maintaining component integrity.
2Reliability
If lead wires and common capacitors are used, then the electronic circuit is protected, but the device size cannot be reduced
Solution Approach 1:
The invention changes the physical parameters of the protective structure by using a resinous holder with specific mechanical properties that can withstand molding pressure. This allows the transition from bulky protective structures (lead wires and common capacitors) to a compact resinous holder that provides equivalent or superior protection while enabling size reduction.
Solution Approach 2:
The resinous holder is formed as a composite structure that integrates multiple protective functions. It combines mechanical strength to resist molding pressure with electrical insulation properties to protect the electronic circuit, replacing the need for separate lead wires and common capacitors while achieving both protection and compactness.
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
The solution enables the creation of a compact, vibration-proof, and temperature-resistant liquid level detecting device that effectively measures liquid levels without mechanical damage to the chip capacitors, enhancing the device's reliability and accuracy.
Implementation Method 1
the electronic circuit is a hall IC
Implementation Method 2
field means for forming a magnetic field
Data Source
AI summary
A liquid level detecting device for detecting liquid level contained in a tank includes a float and an arm that moves in a prescribed manner when liquid level changes, a permanent magnet for forming a magnetic field, a hall IC for generating an electric signal in response to the motion of the magnetic field, a rotary member linked with the arm and the permanent magnet for moving the magnetic field relative to the hall IC as the float and the arm move, a terminal member for connecting the hall IC to an outside control circuit; and a mold body including a resinous holder for holding the hall IC and the terminal member. The resinous holder includes a sheath for insulating the hall IC from heat and mechanical stress generated when the mold body is formed.