Conical Lens Mount Assembly for Optical Sensor Alignment
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Solution Overview
Problem
Conventional variable-focal-length electronic camera systems are cumbersome and costly due to the need for complex and expensive welding of motor connectors and precise XY positioning of the lens mount, which also introduces mechanical weaknesses.
Innovation Solution
A simplified assembly system using a conical cover and frame elements with complementary clipping means, allowing for resilient contact between motor blades and pads on the support board, eliminating the need for welding and precise positioning tools, and enabling accurate alignment and movement of the objective along the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motor connectors are connected to pads on the optical card by flexible connection requiring weldings, then electrical connection is achieved, but manufacturing cost increases and mechanical strength decreases
Solution Approach 1:
The patent replaces the welding process (thermal/mechanical system) with a direct mechanical insertion system. The motor connector is inserted directly into the motor socket without welding, using mechanical engagement features such as positioning protrusions and elastic elements to secure the connection. This eliminates the need for complex welding operations while maintaining connection reliability.
2Manufacturing precision
If the lens mount is glued on the support board with complex XY positioning means, then optical alignment precision is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent incorporates preliminary positioning features directly into the lens mount structure. The lens mount includes pre-formed positioning protrusions that engage with corresponding positioning recesses on the support board, establishing accurate optical alignment before the assembly is finalized. This preliminary mechanical positioning eliminates the need for complex post-assembly adjustment mechanisms.
Solution Approach 2:
The lens mount structure includes self-aligning features such as elastic elements and positioning protrusions that automatically guide the lens into the correct position during assembly. The elastic elements provide self-adjusting pressure to maintain optical alignment without requiring external positioning tools or complex adjustment mechanisms.
3Strength
If conventional heavy-duty assembly methods are used for variable-focus systems, then structural strength is ensured, but system weight increases
Solution Approach 1:
The patent divides the assembly into modular components: the lens mount, the support board, the motor assembly, and the cover. Each component is independently designed with optimized structural features. The lens mount and support board are connected through localized reinforcement areas rather than heavy-duty universal mounting, reducing overall weight while maintaining structural integrity at critical points.
Solution Approach 2:
The patent applies structural reinforcement only where needed. The support board includes localized reinforcement areas around the motor socket and lens mount positioning points, rather than being uniformly thick throughout. The lens mount includes localized strengthening at the positioning protrusions and elastic element mounting areas, maintaining strength where required while minimizing overall material usage and weight.
Data Source
AI summary
An assembly structure of a mobile objective above an optical sensor assembled on a support board includes a cover assembled on the support board with an opening facing the sensor, this cover having a conical external surface with an axis orthogonal to the support board. The structure also includes a frame having first and second elements, shiftable with respect to each other under the action of an electric motor. The first frame element has a conical internal surface capable of mating with the conical external surface of the cover to ensure its positioning and to put resilient connection blades of a fixed portion of the motor in contact with pads formed on the support board, and the second frame element supports the objective and a shiftable portion of the motor.