Lamp Light Shielding Portion Deflects Sunlight from Resin Lens Holder
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Solution Overview
Problem
Resin lens holders in outdoor lamps are susceptible to damage from condensed sunlight, leading to potential failure and increased manufacturing costs due to the need for heat-resistant materials.
Innovation Solution
Incorporating a light shielding portion formed by bending a portion of the base plate between the projection lens and the lens holder to deflect sunlight, thereby preventing damage and maintaining cost-effectiveness by using resin materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the lens holder is made of resin to reduce weight and manufacturing cost, then the weight and manufacturing cost are reduced, but the lens holder becomes susceptible to damage from condensed sunlight
Solution Approach 1:
A light shielding portion is introduced as an intermediary element between the projection lens and the lens holder. This light shielding portion intercepts sunlight before it can reach the lens holder, protecting the resin material from thermal damage while allowing the lens holder to remain made of lightweight resin material.
2Ease of manufacture
If the lens holder is made of resin to reduce manufacturing cost, then the manufacturing cost is reduced, but the lens holder becomes susceptible to damage from condensed sunlight
Solution Approach 1:
A light shielding portion is introduced as an intermediary element between the projection lens and the lens holder. This light shielding portion intercepts sunlight before it can reach the lens holder, protecting the resin material from thermal damage while allowing the lens holder to remain made of lightweight resin material.
3Reliability
If a light shielding portion is added to protect the lens holder from sunlight, then the resistance to sunlight damage is improved, but the device complexity increases
Solution Approach 1:
The light shielding portion is integrated with the base plate, merging two functional elements into a single component. The base plate serves both as the mounting structure for the light source and as the light shielding element that protects the lens holder from sunlight, thereby reducing overall device complexity.
Solution Approach 2:
The base plate is designed to perform multiple functions: it serves as the mounting structure for the light source, provides structural support, and acts as the light shielding portion that protects the lens holder from sunlight. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
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 effectively suppresses sunlight-induced damage to the lens holder while maintaining a reduced manufacturing cost by using resin components, ensuring the lamp's durability and efficiency in outdoor applications.
Implementation Method 1
a light shielding portion which is provided between the projection lens and the lens holder and extends toward the projection lens... the light shielding portion is formed by bending a portion of the base plate... at least a portion of sunlight incident through the projection lens from the outside of the lamp is not irradiated to the lens holder but is irradiated to the light shielding portion
Data Source
AI summary
A lamp includes a light source, a projection lens in which light from the light source is incident on one surface and the light is emitted from the other surface, a lens holder to which the projection lens is fixed and which extends to a side opposite to the direction of the light emitted from the projection lens, and a base plate disposed on the side opposite to a side of the lens holder to which the projection lens is fixed and having an opening through which the light from the light source passes. The base plate has a light shielding portion which is provided between the projection lens and the lens holder and extends toward the projection lens, and the light shielding portion is formed by bending a portion of the base plate.