Soldered Beam Connection Structure for Fast Optical Scanner Assembly
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Solution Overview
Problem
Conventional optical scanning apparatuses face challenges in quickly and securely fixing beams to substrates due to the weak adhesive strength of conductive adhesives and the need for adhesive hardening before proceeding with manufacturing.
Innovation Solution
A beam configuration that includes a base connecting part, a coil connecting part, and a beam part, with soldering parts that have a first connecting part and a second connecting part, allowing for electrical and mechanical connection by soldering, which enhances strength and reduces connection time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conductive adhesive is used to fix beams to substrates, then the manufacturing process can proceed without additional bonding steps, but the adhesive strength is weak and manufacturing time is extended due to hardening requirements
Solution Approach 1:
The patent replaces the chemical bonding mechanism of adhesives with a mechanical connection system. The beam includes protrusions that fit into recesses on the substrate, creating a mechanical interlock that provides immediate structural strength without requiring chemical hardening time. This mechanical substitution resolves the contradiction by eliminating the waiting period for adhesive hardening while maintaining strong bonding.
Solution Approach 2:
The beam is segmented into multiple functional parts: a body portion, protrusions for mechanical engagement, and a conductive portion for electrical connection. This segmentation allows the mechanical connection (protrusions) to provide immediate structural strength while the conductive portion can be separately optimized for electrical conductivity, resolving the time-strength contradiction by decoupling structural and electrical functions.
2Reliability
If conductive adhesive is used to connect beams and substrates, then electrical conductivity can be achieved, but the adhesive strength remains insufficient compared to mechanical bonding
Solution Approach 1:
The patent merges multiple functions into the beam structure: mechanical support through the beam body, electrical conductivity through the conductive portion, and positional alignment through the protrusions. This merging of functions creates a unified connection system that simultaneously achieves mechanical strength and electrical conductivity, resolving the reliability-strength contradiction by integrating rather than separating these requirements.
Solution Approach 2:
The beam employs composite construction with different portions optimized for different functions: the beam body provides mechanical strength, while the conductive portion ensures electrical connectivity. This composite approach allows each portion to be optimized independently, achieving both high bonding strength and reliable electrical connection without the limitations of using a single material for both purposes.
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 described beam configuration enables faster and stronger connections to substrates compared to using conductive adhesives, ensuring reliable operation of the optical scanning apparatus.
Implementation Method 1
at least one of the base connecting part and the coil connecting part has a soldering part to be soldered to the base substrate or the coil substrate
Implementation Method 2
an electromagnetic drive element that uses a Lorentz force generated when an electric current is passed through a magnetic field is utilized in order to swing the mirror
Data Source
AI summary
A beam includes a base connecting part to be connected to a base substrate, a coil connecting part to be connected to a coil substrate, and a beam part coupling the base connecting part to the coil connecting part. At least one of the base connecting part and the coil connecting part has a soldering part to be soldered to the base substrate or the coil substrate, and the soldering part includes a first connecting part and a second connecting part adjacent to the first connecting part, and when a direction in which the first connecting part and the second connecting part are adjacent to each other is defined as an adjacent direction, a cross-section of the first connecting part orthogonal to the adjacent direction is smaller in area than a cross-section of the second connecting part orthogonal to the adjacent direction.


