Medical Headlamp Rigid-Flex Circuit and Seamless Housing
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Solution Overview
Problem
Prior medical headlamp assemblies are uncomfortable due to rigid polymer used to support batteries, and they have seams that facilitate fungal growth and cleaning agent penetration, potentially damaging electrical components.
Innovation Solution
A battery headlamp assembly with a light engine bezel and adjustable linkage, featuring a rigid-flex circuit embedded in a polymer material with protective cans and a unitary headband design that positions batteries behind the ears, eliminating seams and using a softer polymer for comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid polymer is used to support batteries, then structural strength is improved, but comfort is worsened
Solution Approach 1:
The patent applies different material properties to different regions of the headband. The battery mounting region uses a softer, more compliant material compared to other structural areas, allowing the headband to maintain overall strength while providing comfort where it contacts the user's head during extended wear.
2Ease of manufacture
If separate elements are fastened together to create housing, then ease of manufacture is improved, but reliability is worsened due to seams
Solution Approach 1:
The patent transitions from a multi-piece construction with seams to a unitary, seamless housing structure. This eliminates the seams that would otherwise trap moisture and facilitate fungal growth, while maintaining ease of manufacture through injection molding or similar processes that can produce complex seamless shapes.
3Device complexity
If batteries are positioned closer to the headband, then device complexity is reduced, but comfort is worsened due to pressure on ears
Solution Approach 1:
The patent redistributes battery weight along the longitudinal axis of the headband, positioning batteries toward the rear away from the ears. This spatial rearrangement balances the center of gravity and reduces pressure points on the ears, improving comfort during extended wear while maintaining a relatively simple overall structure.
4Ease of manufacture
If seams are present in headband housing, then ease of manufacture is improved, but manufacturing precision is worsened due to difficult-to-clean areas
Solution Approach 1:
The patent employs a seamless unitary construction that eliminates crevices and joints where debris and contaminants could accumulate. This seamless design allows for thorough cleaning and sterilization, which is critical for medical applications, while still enabling efficient manufacturing through modern molding techniques.
Data Source
AI summary
A battery headlamp assembly that includes a light engine bezel, an adjustable linkage supporting the bezel and including an electrically conductive system terminating at the bezel. Also, a headband assembly supports the adjustable linkage and includes a longitudinal rigid-flex circuit assembly. This assembly has a strip of rigid-flex circuit having two longitudinally opposed ends and including battery contacts on the ends. Also, two networks of electrical components are each supported by and electrically connected together, and to one of the battery contacts, by the strip of rigid-flex circuit, which includes conductive traces connecting both the networks to the electrically conductive system and to each other, to power the bezel from the battery contacts and to permit communications between the networks. In addition, a further electrically conductive element, electrically connects at least one conductive trace of the rigid-flex circuit to the electrically conductive system of the adjustable linkage.