Flash Light Source Device with Conductive Housing and Shielded Cable
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Solution Overview
Problem
Existing flash light source devices face challenges in further miniaturization and suppression of electromagnetic noise emission.
Innovation Solution
A flash light source device incorporating a conductive housing, a wiring board with a circuit, and an electromagnetic shield cable with a directly connected wire and exposed electromagnetic shield layer, which is electrically connected to the housing, reducing installation space and electromagnetic noise emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the wiring board and electromagnetic shield cable are connected via a connector, then the connection is reliable and easy to assemble, but the installation space increases
Solution Approach 1:
The patent merges the connector function into the wiring board by directly forming connection terminals on the wiring board itself. The electromagnetic shield cable is directly connected to these terminals, eliminating the need for separate connectors. This integration reduces the number of components and assembly steps while maintaining reliable electrical connection, thereby reducing installation space without significantly increasing device complexity.
Solution Approach 2:
The patent extracts the connector component from the system by implementing direct connection terminals on the wiring board. This eliminates the intermediate connector element, allowing the electromagnetic shield cable to be directly mounted to the wiring board. This extraction reduces the overall installation space while the direct terminal design maintains connection reliability.
2Object-affected harmful factors
If the electromagnetic shield layer is completely covered with insulating protective layer, then the insulation performance is improved, but the electromagnetic noise shielding capability at the opening is reduced
Solution Approach 1:
The patent applies local quality by selectively covering the electromagnetic shield layer with an insulating protective layer. The insulating layer is applied to portions of the electromagnetic shield cable that are not at the opening, providing insulation where needed. At the opening portion, the electromagnetic shield layer remains exposed and is electrically connected to the housing, maintaining electromagnetic shielding capability. This localized differentiation of insulation coverage resolves the contradiction between insulation performance and electromagnetic noise shielding.
Solution Approach 2:
The patent segments the electromagnetic shield layer into two functional zones: a covered portion with insulating protective layer for electrical insulation, and an exposed portion at the opening for electromagnetic shielding and electrical connection to the housing. This segmentation allows each zone to perform its specific function optimally, with the covered portion providing insulation and the exposed portion providing electromagnetic noise suppression.
3Volume of moving object
If the flash light source device is further miniaturized, then the installation space is reduced, but the suppression of electromagnetic noise becomes more difficult
Solution Approach 1:
The patent merges the electromagnetic shielding function with the housing structure by providing a conductive housing that serves as both the device enclosure and the electromagnetic shield. The exposed electromagnetic shield layer at the opening is directly connected to this conductive housing, creating a continuous shielding path. This integration allows effective electromagnetic noise suppression without requiring additional space for separate shielding components, enabling miniaturization while maintaining noise suppression capability.
Solution Approach 2:
The patent implements multi-functionality by designing the housing to serve dual purposes: as the structural enclosure of the device and as the electromagnetic shield. The conductive housing material and structure provide both mechanical protection and electromagnetic noise suppression. This universal design eliminates the need for separate shielding components, reducing overall device size while maintaining effective electromagnetic noise suppression.
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 enables a reduction in installation space and effective suppression of electromagnetic noise, ensuring reliable electrical connections and preventing short circuits.
Implementation Method 1
an electromagnetic shield layer that covers the wire, and an insulating protective layer that covers the electromagnetic shield layer... the part corresponding to the opening in the electromagnetic shield layer is electrically connected to a part defining the opening in the housing
Data Source
AI summary
A flash light source device includes: a flash lamp; a wiring board that is provided with a circuit configured to cause the flash lamp to emit light; a housing that is formed of a conductive material and accommodates the flash lamp and the wiring board; and an electromagnetic shield cable that includes a wire directly connected to the wiring board, an electromagnetic shield layer that covers the wire, and an insulating protective layer that covers the electromagnetic shield layer, and extends to the inside and outside of the housing through an opening formed in the housing. The electromagnetic shield layer is exposed at least at a part corresponding to the opening. The part corresponding to the opening in the electromagnetic shield layer is electrically connected to a part defining the opening in the housing.