Lens Module Riveting Portion for Projection Device Assembly
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Solution Overview
Problem
Existing projection lens modules face high manufacturing costs, poor assembling accuracy, and low reliability due to traditional fixing methods such as pressured rings, glue, or wire springs, with riveting processes being limited by original design constraints.
Innovation Solution
A projection device and lens module design featuring a lens barrel with an inner wall and riveting portions that have a gap, allowing easy extension of riveting equipment to press and overlay the riveting portion onto the lens' light emitting surface for secure fixation, reducing manufacturing costs and improving accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixing methods (pressured ring, glue, wire spring) are used to fix the lens, then the lens can be secured in the lens barrel, but the manufacturing cost increases, assembling accuracy deteriorates, and reliability decreases
Solution Approach 1:
The lens barrel is segmented into distinct functional regions: a fixing portion with an outer contour matching the lens outer contour for mechanical support, and a riveting portion extending onto the light emitting surface for secure fixation. This segmentation allows each portion to perform its specific function optimally, achieving reliable lens fixation through a cost-effective riveting process rather than expensive traditional methods
Solution Approach 2:
The riveting portion extends from the side surface of the lens barrel onto the light emitting surface of the lens, adding a dimensional element that enables riveting access. This dimensional extension allows the riveting process to be implemented without requiring complex destructive operations, thereby reducing manufacturing cost while improving fixation reliability
2Manufacturing precision
If traditional fixing methods are used, then the lens can be secured, but the assembling accuracy becomes poor
Solution Approach 1:
By dividing the lens barrel into a fixing portion and a riveting portion, the design enables precise positioning through the fixing portion's outer contour match while achieving secure fixation through the riveting portion. This segmentation allows the assembling process to be performed with high precision using simple riveting operations, improving both assembling accuracy and fixation reliability simultaneously
Solution Approach 2:
The fixing portion is designed with an outer contour that naturally matches the lens outer contour, allowing the lens to be self-positioned during assembly. This self-service feature eliminates the need for complex alignment procedures, thereby improving assembling accuracy while maintaining high fixation reliability through the riveting portion
3Reliability
If a riveting knife is used to form folded pieces at the lens barrel in a destructive way, then the lens can be fixed, but the manufacturing cost remains high, assembling accuracy remains poor, and reliability remains low
Solution Approach 1:
The lens barrel is divided into a fixing portion and a riveting portion, where the riveting portion is specifically designed to extend onto the light emitting surface. This segmentation eliminates the need for destructive folded pieces by providing a dedicated riveting access path, thereby simplifying the riveting process structure while maintaining high fixation reliability
Solution Approach 2:
The riveting portion extends onto the light emitting surface, creating a new dimensional access path for the riveting process. This dimensional change eliminates the need for complex destructive operations inside the lens barrel, simplifying the overall device structure while achieving reliable lens fixation through a straightforward riveting process
Data Source
AI summary
A projection device includes a main body, a light source, a light valve, and a lens module. The light source produces an illumination beam. The light valve converts the illumination beam into an image beam. The lens module disposed at the main body includes a lens barrel and a lens. The lens barrel has an inner wall, a containing space and a riveting portion. The inner wall surrounds the containing space. The riveting portion is located in the containing space. There is a gap between the riveting portion and the inner wall. The lens disposed in the containing space has a light emitting surface and a side surface. The side surface leans against the riveting portion. An end of the riveting portion extends to the light emitting surface to limit the lens in the containing space The image beam passes through the lens to form a projection beam.