Shield Cover With Perpendicular Press Plates For Resin Package Positioning
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Solution Overview
Problem
Conventional light receiving modules face difficulties in proper mounting of the shield cover due to mismatched dimensions, leading to inefficient manufacturing processes and entanglement issues during mass production.
Innovation Solution
A light receiving module design featuring a shield cover with two press plates that apply perpendicular forces to ensure precise positioning of the resin package, reducing the risk of entanglement and facilitating easy handling during mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the inner dimension of the shield cover is adjusted to fit the resin package, then the mounting precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The shield cover is segmented into a body portion and multiple press plates (first press plate and second press plate) that extend from the body. This segmentation allows the press plates to independently contact and position the resin package at different locations, achieving precise mounting without requiring complex adjustment of the entire shield cover structure.
Solution Approach 2:
The press plates are designed to preliminarily position the resin package during the mounting process by pressing against its side surfaces. This preliminary positioning action ensures accurate alignment before final fixation, improving mounting precision while maintaining a relatively simple overall structure.
2Ease of manufacture
If the shield cover inner dimension is made larger for easier handling, then the ease of manufacture is improved, but the positioning precision deteriorates
Solution Approach 1:
By dividing the positioning function into multiple press plates distributed around the resin package, the design achieves both easy handling (larger overall dimensions) and precise positioning (multiple contact points). The press plates can be positioned at optimal locations to provide both accessibility and accuracy.
Solution Approach 2:
The shield cover combines multiple functions into a single structure: electromagnetic shielding, positioning (through press plates), and mechanical support. This merging allows the shield cover to maintain larger dimensions for easy handling while the integrated press plates ensure precise positioning of the resin package.
3Productivity
If multiple shield covers are handled collectively during mass production, then the productivity is improved, but the entanglement risk increases
Solution Approach 1:
The first press plate and second press plate are positioned asymmetrically relative to each other in the insertion direction. This asymmetric arrangement creates a unique orientation for each shield cover, preventing them from nesting or entangling when handled collectively during mass production, thereby maintaining high productivity.
Solution Approach 2:
The press plates are designed to create a balanced positioning force distribution around the resin package. This equipotential positioning approach ensures that shield covers maintain a stable, uniform orientation when stacked or handled collectively, reducing entanglement risks while preserving manufacturing efficiency.
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 design ensures proper two-dimensional positioning of the resin package and shield cover, preventing entanglement and improving manufacturing efficiency by allowing precise alignment and reduced space between press plate ends.
Implementation Method 1
The shield cover 95 serves as an electromagnetic shield by converting incoming electromagnetic waves into weak electric currents and releasing the currents to an external ground line through the ground terminal 95a
Data Source
AI summary
A light receiving module includes a substrate, a light receiving element mounted on the substrate, a resin package covering the light receiving element, and a shield cover into which the resin package is inserted in an insertion direction. The shield cover includes first and second press plates configured to press the resin package in two different directions that are perpendicular to the insertion direction. The first press plate and the second press plate include a first end and a second end, respectively, which are adjacent but different in position in the insertion direction.