CIS Housing Mechanical Fixing for Adhesive-Free Disassembly
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Solution Overview
Problem
Existing image reading devices, such as CIS modules, face difficulties in disassembly and recycling due to the use of adhesive agents for fixing light guide bodies and image forming optical devices, which hinders efficient recycling and component separation.
Innovation Solution
An image reading device design that employs a holding unit with an insertion hole and a concave groove, allowing the light guide body and image forming optical device to be securely held without adhesives, enabling easy disassembly and improved recycling efficiency, where the light guide body partially overlaps with the image forming optical device, and a biasing unit ensures proper alignment and light incidence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive agents are used to fix the light guide body and image forming optical device to the housing, then the components are securely fixed in position, but the device becomes difficult to disassemble and recycle
Solution Approach 1:
The patent replaces the chemical bonding system (adhesive agents) with a mechanical interlocking system. The holding unit features an insertion hole that receives the light guide body and a concave groove that fits the image forming optical device, creating secure mechanical fixation without adhesives. This allows the components to be firmly held while remaining easily removable for disassembly and recycling.
2Reliability
If adhesive agents are used to assemble the light guide body and image forming optical device, then the components are firmly fixed, but recycling efficiency deteriorates
Solution Approach 1:
The patent segments the housing into distinct functional areas: a holding unit with an insertion hole for the light guide body and a separate concave groove for the image forming optical device. This segmentation allows each component to be independently installed and removed, enabling firm fixation during use while facilitating efficient separation and recycling when the device reaches end-of-life.
3Stability of the object's composition
If the light guide body and image forming optical device are fixedly disposed using adhesive agents, then the assembly is stable, but the device complexity increases due to additional fixing materials
Solution Approach 1:
The patent merges the fixing function into the structural design of the holding unit itself. The insertion hole and concave groove are integrated features of the housing that simultaneously provide structural support and mechanical fixation. This eliminates the need for separate adhesive materials and simplifies the overall assembly process while maintaining stable component positioning.
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 allows for the image reading device to be assembled and disassembled without adhesives, enhancing recycling efficiency and preventing light leakage, thus improving the device's environmental sustainability and operational efficiency.
Implementation Method 1
a rod-shaped light guide body guiding light from a light source to an object to be read
Implementation Method 2
an image forming optical device that condenses reflected light from the object which is incident on the incidence surface, thereby forming an erect equal-magnification image on a sensor
Data Source
AI summary
A light guide inserted into an inclined groove is disposed so as to partially overlap with a lens unit that is fitted into a concave groove disposed parallel to the inclined groove when seen in a plan view, to regulate the separation of the lens unit from the concave groove and hold the lens unit in an insertion state by the light guide. Therefore, a fixing unit such as an adhesive agent is not required in fixedly disposing the light guide and the lens unit at a predetermined position of a frame, and a CIS module is assembled without using an adhesive agent, thereby allowing the CIS module that is easily disassembled when being discarded and that improves recycling efficiency to be provided.