Imaging Apparatus Wiring Substrate Fixation via Stopper Hook
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Solution Overview
Problem
Existing biometric authentication apparatuses, such as those imaging palm veins, face challenges in securely fixing wiring substrates within the housing structure, leading to potential dislodgment under applied loads.
Innovation Solution
The imaging apparatus employs a stopper mechanism with stopper claw parts that engage with the housing's outer peripheral surface and hook onto the housing's protruding parts, effectively sandwiching the wiring substrate between the housing and stoppers, ensuring secure fixation and preventing dislodgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple engagement structure is used to fix the wiring substrate, then the device complexity is reduced, but the reliability of fixation deteriorates leading to potential dislodgment under load
Solution Approach 1:
The stopper is divided into multiple functional segments: engagement parts that attach to the housing outer peripheral surface, hook parts that engage with protruding parts of the housing, and substrate pressing parts that contact the wiring substrate. This segmentation allows each part to perform its specific function efficiently, achieving reliable fixation without requiring a complex overall structure
Solution Approach 2:
The stopper components are nested within the housing structure, with engagement parts inserted into engagement grooves on the housing outer surface, and hook parts engaging with protruding parts extending from the housing. This nested arrangement secures the wiring substrate within the housing using the housing's own structural features, achieving reliable fixation with minimal additional complexity
2Stability of the object's composition
If the wiring substrate is securely fixed using multiple engagement points, then the stability under load is improved, but the ease of manufacture deteriorates due to more complex assembly
Solution Approach 1:
Multiple fixation functions are merged into a single stopper component: the engagement parts attach to the housing, the hook parts engage with protruding parts, and the substrate pressing parts secure the wiring substrate. This merging allows the substrate to be firmly fixed at multiple points while maintaining ease of manufacture, as the entire fixation mechanism is implemented through one integrated part rather than multiple separate components
Solution Approach 2:
The stopper is designed to be inserted from the rear surface side of the wiring substrate, with the engagement parts automatically engaging with the housing outer surface and the hook parts automatically hooking onto the protruding parts during insertion. This self-service design eliminates the need for complex assembly operations, allowing stable fixation to be achieved easily during manufacturing
Data Source
AI summary
An image apparatus includes an imaging unit, a housing that houses the imaging unit, a wiring substrate, and a stopper that sandwiches the wiring substrate between the housing and the stopper. The housing has a protruding part that protrudes from a back surface of a side opposite to a front surface on the side of the imaging unit in the wiring substrate. The stopper has an engagement part that engages with an outer peripheral surface of the housing, and a hook part that is hooked onto an inner peripheral surface of the protruding part of the housing.