Camera Lens Frame Circuit Board Fixing Mechanism
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Solution Overview
Problem
Conventional cameras face manufacturing inefficiencies due to the difficulty in fixing circuit boards to lens holding frames and suffer from flare issues caused by light reflection from the lead-out portions.
Innovation Solution
The camera design incorporates a lens holding frame with convex restricting members and a circuit board featuring a flexible substrate with a reinforcing plate, where the reinforcing plate is positioned between the restricting members to facilitate easy fixation and reduce flare by directing the circuit board's lead-out portion above the lens's horizontal center line and ensuring non-coincidence of normal and vertical lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If restricting pins are inserted into restricting holes to fix the circuit board, then the circuit board can be fixed reliably to the lens holding frame, but the manufacturing process becomes difficult and inefficient due to the small size of the restricting holes
Solution Approach 1:
Instead of inserting pins through holes in the circuit board (conventional approach), the invention inverts the approach by providing protrusions on the circuit board that fit into recesses in the lens holding frame. This eliminates the need for small restricting holes and pins, making manufacturing easier while maintaining reliable fixing.
Solution Approach 2:
The fixing structure is segmented into multiple protrusions distributed at different locations on the circuit board, each fitting into corresponding recesses in the lens holding frame. This segmentation allows for reliable fixing without requiring precise alignment of single small holes, improving manufacturing efficiency.
2Reliability
If the lead-out portion is positioned to facilitate electrical connection, then electrical connectivity is established, but flare is caused by light beam reflection from the lead-out portion
Solution Approach 1:
The lead-out portion is positioned asymmetrically relative to the lens optical axis, specifically located above the horizontal center line when the camera is in erect posture. This asymmetric positioning prevents light beams from reflecting off the lead-out portion into the lens, eliminating flare while maintaining electrical connectivity.
Data Source
AI summary
An image pickup apparatus of the present invention includes: a lens holding frame 10 that holds a lens 30, on the periphery of which a first pair of restricting members composed of convex members 101 and 102 are provided at at least two places; and a circuit board 20 that connects the lens holding frame 10 with a camera main body electrically. The circuit board 20 includes a flexible substrate 21 with wiring that establishes electrical connection, and a reinforcing plate 22 fixed to a part of the flexible substrate 21. The circuit board 20 is fixed to the lens holding frame 10, such that at least a part of the reinforcing plate 22 is disposed between the first pair of restricting members, and that both ends of the part of the reinforcing plate 22 disposed between the first pair of restricting members are restricted by the first pair of restricting members. Consequently, it is possible to provide a camera that is easy to manufacture or to provide a camera that causes little flare.