Light Source Electrode Assembly for Precise LED Positioning
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Solution Overview
Problem
Conventional light source devices for timepieces, which use LEDs with lead terminals, face issues with positional accuracy due to variations in the bent position of the leads and require additional steps for removal, including unbending and accessing from both sides.
Innovation Solution
A light source device with a light emitter supported by electrodes, where the electrodes include a support and a terminal extending opposite to the light emitting direction, and restrictors to prevent movement in specific directions, allowing the light emitting member to be fixed without bending the terminals, improving positional accuracy and simplifying the attachment and removal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lead terminals are bent to fix the light emitting member, then the light emitting member can be attached to the case member, but positional accuracy deteriorates due to variations in bent position
Solution Approach 1:
The electrode is divided into two distinct parts: a support portion that contacts the light emitter and a terminal portion that extends in the opposite direction of light emission. This segmentation eliminates the need to bend the terminal for fixation, as the support portion provides a dedicated contact area that maintains positional accuracy while the terminal portion remains straight for electrical connection.
Solution Approach 2:
The support portion acts as an intermediary between the light emitter and the case member. Instead of directly bending the terminal to attach the light emitter, the support portion serves as a mediator that provides a stable contact surface, thereby maintaining the straight configuration of the terminal and ensuring consistent positioning of the light emitter.
2Reliability
If lead terminals are bent for fixation, then the light emitting member can be secured, but additional steps are required for removal including unbending and accessing from both sides
Solution Approach 1:
By separating the electrode into a support portion and a terminal portion, the fixation function is assigned to the support portion while the terminal portion remains accessible and unbent. This allows the light emitting member to be securely fixed through the support portion while enabling easy removal by simply detaching from the terminal portion without requiring unbending or access from both sides.
Solution Approach 2:
Instead of bending the terminal to achieve fixation (conventional approach), the invention inverts the approach by using the support portion for fixation and leaving the terminal portion straight and accessible. This inversion of the traditional electrode configuration simplifies both attachment and removal operations.
Data Source
AI summary
Disclosed is a light source device including: a light emitter; an electrode including a support that supports the light emitter and a terminal that extends from the support in an opposite direction of a light emitting direction of the light emitter; a second restrictor that restricts a movement of the electrode in a second direction perpendicular to the light emitting direction; and a third restrictor that restricts a movement of the electrode in a third direction perpendicular to both of the light emitting direction and the second direction.