Camera Lens Mount Elastic Biasing for Backlash and Noise Reduction
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Solution Overview
Problem
Existing camera systems with bayonet-mounted lens units lack optimal feedback mechanisms for operator comfort during lens mounting and operation, leading to potential discomfort and noise due to unexamined spring member positions.
Innovation Solution
A camera system design featuring a lens unit with a cylindrical portion and bayonet claws, and a camera body with an elastic member that biases the cylindrical portion radially, improving the feeling and sound experienced by the operator during mounting and operation by adjusting the torque required and reducing backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring member is used to bias the lens unit in the radial direction to absorb backlash, then backlash is reduced, but operator comfort deteriorates due to discomfort and noise during mounting and operation
Solution Approach 1:
A resin layer is introduced as an intermediary between the spring member and the lens unit's cylindrical portion. This resin layer acts as a cushioning medium that absorbs the impact and reduces the transmission of vibration and noise to the lens unit, thereby maintaining backlash absorption while improving operator comfort during mounting and operation
Solution Approach 2:
The resin layer is pre-applied to the cylindrical portion of the lens unit before the spring member is installed. This beforehand cushioning ensures that when the spring member biases the lens unit radially, the force is already cushioned through the resin layer, preventing direct hard contact and reducing discomfort and noise generation
2Reliability
If the spring member position is not optimized, then backlash absorption is achieved, but operator feeling deteriorates with discomfort and noise during mounting and operation
Solution Approach 1:
Instead of uniformly biasing the entire lens unit, the spring member is positioned to bias only the cylindrical portion locally through the resin layer. This localized biasing approach maintains effective backlash absorption at the mounting interface while minimizing the transmission of force that causes discomfort and noise during operation
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
Enhances operator comfort by providing a better feeling and reducing noise during lens mounting and operation, allowing for adjustable torque and reduced backlash through strategic placement of the elastic member and cylindrical portion contact.
Implementation Method 1
an elastic member that has a contact surface to be in contact with the cylindrical portion; and the elastic member biases the cylindrical portion in the radial direction
Data Source
AI summary
There are provided a camera system, a lens unit, and a camera body that can improve feeling and sound to be given to an operator at the time of mounting of the lens unit and the time of operation of the lens unit. A camera system includes a lens unit that includes a lens mount and a camera body that includes a body mount. The lens mount includes a lens-reference surface that is to be in contact with the body mount, a cylindrical portion that extends toward the body mount from the lens-reference surface, and a plurality of bayonet claws that are provided in a circumferential direction of the cylindrical portion and extend outward in a radial direction. The body mount includes a body-reference surface that is to be in contact with the lens-reference surface, a body claw that is to be engaged with the bayonet claws, and an elastic member that has a contact surface to be in contact with the cylindrical portion. The elastic member biases the cylindrical portion in the radial direction in a case where the lens unit is mounted on the body mount.