Rotatable Lens Control Assembly With Variable Damping Feedback
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Solution Overview
Problem
Existing follow focus systems lack adjustability in damping strength, failing to meet the tactile feedback preferences of different users.
Innovation Solution
A rotatable control assembly with variable damping strength based on rotation angle, featuring a pressure-applying member that moves axially relative to the rotating shaft, altering the contact area between a damping member and a fixed assembly, allowing for adjustable damping feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If damping grease or oil is applied between the rotating and fixed parts of the handwheel, then damping effect is achieved, but adjustability in damping strength is lost
Solution Approach 1:
The patent applies the Dynamics principle by making the damping strength adjustable rather than fixed. The pressure-applying member can move axially relative to the rotating shaft, allowing the contact area between the damping member and fixed assembly to be dynamically changed based on rotation angle, thus providing variable damping strength to meet different user preferences
Solution Approach 2:
The patent implements Parameter changes by varying the contact area between the damping member and fixed assembly through axial movement of the pressure-applying member. This changes the physical parameter of damping strength, allowing the system to transition from a fixed damping state (using grease/oil) to a variable damping state that can be adjusted according to rotation angle
2Ease of operation
If fixed damping grease or oil is used, then damping between rotating and fixed parts is provided, but tactile feedback preferences of different users cannot be met
Solution Approach 1:
The system transitions from static damping (fixed grease/oil) to dynamic damping where the contact area and damping force can be adjusted in real-time based on rotation angle, allowing the tactile feedback to be dynamically adapted to different user preferences during operation
3Adaptability or versatility
If variable damping strength is implemented through axial movement of pressure-applying member, then adjustability is achieved, but device complexity increases
Solution Approach 1:
The patent merges the damping function with the existing rotational control structure. The pressure-applying member is integrated into the rotating assembly, and the axial movement mechanism is combined with the rotational movement, allowing variable damping to be achieved without adding a completely separate adjustment system
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
Enables the lens parameter adjustment device to provide customizable damping tactile feedback, accommodating the preferences of various users by varying damping strength with rotation angle.
Implementation Method 1
a damping member (142), wherein the damping member (142) is located between the fixed assembly and the pressure-applying member (141)
Implementation Method 2
the pressure-applying member (141) is configured to move axially relative to the rotating shaft during rotation, and the adjustment member (124) is mounted on the pressure-applying member (141); when rotated by an external force, the adjustment member (124) drives the pressure-applying member (141) to rotate, causing it to move axially relative to the rotating shaft, abut the damping member (142), and alter the contact area between the damping member (142) and the fixed assembly
Data Source
AI summary
A lens parameter adjustment device includes a main body and a rotatable control assembly. The damping strength of the rotatable control assembly can vary according to the rotation angle, hereby enabling the lens parameter adjustment device to meet the damping tactile feedback needs of different users.