Lens Adapter Linear Aperture Control Mechanism
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Solution Overview
Problem
Existing lens adapters do not ensure a linear proportional relationship between the rotation angle of the manual aperture controlling ring and the change in aperture size, making it inconvenient for users to control the aperture effectively.
Innovation Solution
A lens adapter with an adjusting mechanism comprising a barrier and a driven portion, where the barrier's special curve ensures that the rotation angle of the manual aperture controlling ring is linearly proportional to the aperture size variation, achieved through the movement of the lens aperture controlling rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a latch member is provided on the inside track of the manual aperture controlling ring and plug and plugged with the lens aperture controlling rod, then the lens adapter can be equipped with different lenses according to different shooting demands, but the rotation angle of the manual aperture controlling ring is not linearly proportional to the change in size of the aperture
Solution Approach 1:
The patent introduces an adjusting mechanism as an intermediary component between the manual aperture controlling ring and the lens aperture controlling rod. This mechanism includes an adjusting member that can rotate independently and an adjusting slot with a curved trajectory. The curved slot transforms the rotational motion of the adjusting member into linear motion of the aperture controlling rod, thereby establishing a linear proportional relationship between the rotation angle of the manual aperture controlling ring and the aperture size change, while maintaining lens adaptability through the detachable mounting structure.
2Adaptability or versatility
If the stroke of the lens aperture controlling rod is limited within an arc-shaped slot whose center is on the central axis of the lens, then the lens adapter can accommodate different lens specifications, but the rotation angle of the manual aperture controlling ring is completely consistent with the moving angle of the lens aperture controlling rod which is not linearly proportional to the aperture size change
Solution Approach 1:
The patent applies dynamics by making the adjusting mechanism movable and adjustable. The adjusting member can rotate within the adjusting slot, and its position can be adjusted along the curved trajectory. This dynamic structure allows the mechanism to adapt to different lens specifications while maintaining precise linear control over the aperture size, transforming the fixed arc-shaped slot limitation into a flexible adjustable system that achieves both compatibility and precision.
Data Source
AI summary
A lens adapter is provided, comprising a cylindrical base, one end of the base is provided with a first mounting seat for connecting with a lens and a manual aperture controlling ring sheathed on the base, the other end of the base is provided with a second mounting seat for connecting with a camera. The lens adapter also comprises an adjusting mechanism connected to a lens aperture controlling rod and the manual aperture controlling ring. The manual aperture controlling ring is adjusted by the adjusting mechanism to make the rotation angle of the manual aperture controlling ring linearly proportional to the size variation of the lens aperture. The lens adapter allows the rotation angle of the manual aperture controlling ring linearly proportional to the size variation of the lens aperture in a manner of synchronously changing, thus facilitating the user to control the lens aperture.