Projection Apparatus Integration Rod Positioning Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projection apparatuses experience displacement and stress concentration on the integration rod module due to torque and vibrations, leading to incorrect positioning and reduced light projection ability.
Innovation Solution
A positioning device with a flexible element and a stop member is used to securely retain the integration rod module within the casing, utilizing a balanced urging action and an adjusting screw to prevent displacement and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lower flexible element provides elastic support, then the integration rod module is supported within the casing, but torque is generated that causes the front end to press tightly against the rod cover, leading to stress concentration and displacement
Solution Approach 1:
The flexible element is divided into multiple segments (first flexible element and second flexible element) positioned at different locations. This segmentation distributes the support function across multiple points, preventing concentrated torque generation while maintaining overall support stability. Each segment independently provides elastic support without creating excessive localized stress.
Solution Approach 2:
Different flexible elements are positioned at specific locations to provide localized support characteristics. The first flexible element provides support at one location while the second provides support at another, creating non-uniform local support qualities that prevent torque-induced stress concentration at any single point.
2Reliability
If the flexible element provides elastic support, then the integration rod module is retained within the casing, but displacement occurs under vibration or shock due to torque counteracting the elastic force
Solution Approach 1:
The flexible element is divided into multiple segments positioned at different locations within the casing. This segmentation creates multiple independent support points that collectively provide stable retention while distributing mechanical stresses. Under vibration or shock, the segmented structure prevents torque concentration that would otherwise cause displacement.
Solution Approach 2:
The flexible elements are pre-configured to provide elastic cushioning before shocks or vibrations occur. The elastic properties of the segmented flexible elements absorb and dissipate impact energies before they can cause displacement, maintaining position stability under adverse conditions.
3Reliability
If the front end of the integration rod module is in tight abutment against the rod cover, then retention is enhanced, but displacement occurs and retrieval to initial position becomes difficult
Solution Approach 1:
The flexible element is segmented into multiple sections that provide distributed support forces. This prevents excessive tight abutment at any single location, allowing the integration rod module to maintain secure retention while still being able to return to its initial position after displacement due to reduced friction and stress at contact points.
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 stabilizes the integration rod module, preventing displacement from shocks and maintaining optimal light projection performance.
Implementation Method 1
The flexible element has a fixing plate section adapted to be mounted securely on an inner surface of the casing and a first distal plate section extending integrally from one end of the fixing plate section toward the rod cover for resiliently urging the holder
Implementation Method 2
a counterclockwise torque M caused by the lower flexible element 19 causes the integration rod module 10 to uplift
Data Source
AI summary
A positioning device for positioning an integration rod module disposed in an optical path between a light source device and a projection lens within a projection apparatus includes a flexible element having a fixing plate section mounted securely on an inner surface of a casing interconnecting the light source device and the projection lens and enclosing the integration rod module, and a first distal plate section extending integrally from one end of the fixing plate section toward a rod cover mounted on the casing for resiliently urging a holder of the rod module to press against the inner surface of the casing at a position opposite to the flexible element. A stop member is disposed securely on the holder adjacent to the rod cover to facilitate abutment of the first distal plate section of the flexible element against the holder to enhance retention of the rod module within the casing.