Optical Scanning Device Lid Engagement for Dust-Proof Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical scanning devices face challenges in achieving a balance between secure attachment of the lid member to the housing to prevent dust ingress while allowing for easy and efficient disassembly for maintenance or replacement.
Innovation Solution
The optical scanning device incorporates a housing with groove portions and suspended portions that allow for secure attachment of the lid member using engagement protrusions and holes, and a disassembly method using a jig to elastically deform the suspended portions for easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the lid member is securely attached to the housing using engagement protrusions and grooves, then dust-proofness is improved, but disassembly difficulty increases
Solution Approach 1:
The suspended portion is designed as an elastic component that can dynamically change its state between engaged and disengaged positions. During assembly, the suspended portion elastically deforms to pass through the groove portion and engages with the side-wall engagement portion, providing secure attachment. During disassembly, the same elastic property allows the suspended portion to be easily deformed outward by the jig, enabling quick release without damaging components.
Solution Approach 2:
The engagement mechanism utilizes elastic deformation as a variable parameter. The suspended portion's elastic property allows it to change its physical state (deformed vs. engaged) based on applied force. This parameter change enables the same structure to provide both secure engagement during operation and easy disassembly during maintenance, resolving the contradiction between attachment strength and disassembly ease.
2Reliability
If multiple engagement portions are used to secure the lid member, then attachment reliability is improved, but device complexity increases
Solution Approach 1:
The engagement mechanism is segmented into multiple independent engagement portions, each consisting of a suspended portion with an engagement hole and a corresponding side-wall engagement portion. This segmentation allows each engagement point to function independently, providing reliable attachment through multiple points while maintaining simplicity in the overall design. The modular nature of the segmented engagement portions makes the structure easier to manufacture and assemble compared to a single complex engagement mechanism.
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
This configuration ensures dust-proofness during operation while facilitating smooth and simultaneous detachment of the lid member, enhancing maintenance efficiency.
Implementation Method 1
inserting the jig into a lateral space between the groove portion and the suspended portion to elastically deform the suspended portion in a direction away from the groove portion
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An optical scanning device (100) includes a scanning optical system (1), a housing (2), and a lid member (3). The housing (2) includes a groove portion (221) depressed inward from a laterally outer side of a side wall portion (22) and that extends in an up-down direction, and a side-wall engagement portion (222) disposed in the groove portion (221). The lid member (3) includes a suspended portion (321) hanging down from a peripheral portion (32) thereof, and a suspended engagement portion (322) disposed in the suspended portion (321). The groove portion (221) penetrates the side wall portion (22) in the up-down direction as seen from the up-down direction, and, in a state where the lid member (3) is attached to the housing (2), the suspended portion (321) is located in the groove portion (221) as a result of being inserted into the groove portion (221) from above, with the side-wall engagement portion (222) in engagement with the suspended engagement portion (322) in the up-down direction.