Camera Accessory Mount Recessed Portion for Elastic Member Deformation
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Solution Overview
Problem
Existing dust-proof and drip-proof structures for camera accessories can become difficult to mount or demount due to excessive compression of elastic members when back-focus is adjusted by cutting a plane perpendicular to the optical axis, leading to increased friction and operational challenges.
Innovation Solution
Incorporating an annular space portion on the external ring that allows the elastic member to deform and escape, reducing friction and enabling easier mounting and demounting by providing a recessed area for the elastic member to enter when the accessory is mounted, thus maintaining a watertight seal while minimizing operational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the back-focus is adjusted by cutting the plane of the component on the camera accessory side that is perpendicular to the optical axis, then the back-focus can be corrected to the designed value, but the elastic member may be excessively squashed when the accessory is mounted on the camera body
Solution Approach 1:
The patent introduces a recessed portion in the cylindrical member that extends in the optical axis direction, creating a three-dimensional space for the elastic member to deform into. This dimensional approach allows the elastic member to be accommodated during mounting without excessive compression, resolving the contradiction between back-focus adjustment precision and mounting ease.
Solution Approach 2:
The recessed portion is designed in advance to provide a cushioning space for the elastic member before it is excessively compressed. This pre-prepared space prevents the harmful effect of excessive squashing that would occur without such accommodation, allowing the elastic member to deform smoothly during the mounting process.
2Reliability
If the elastic member is excessively squashed when the accessory is mounted on the camera body, then the dust-proof and drip-proof seal may be improved, but it becomes difficult to demount the accessory from the camera body
Solution Approach 1:
By providing a recessed portion that extends in the optical axis direction, the patent creates additional space for the elastic member to deform into during mounting. This prevents excessive squashing while maintaining the seal, allowing the accessory to be demounted easily without compromising dust-proof and drip-proof reliability.
Solution Approach 2:
The recessed portion changes the spatial parameters of the mounting structure, providing a controlled environment for elastic member deformation. This parameter change allows the elastic member to achieve sufficient compression for sealing while preventing excessive squashing that would hinder demounting.
3Reliability
If the elastic member is excessively squashed when the accessory is mounted on the camera body, then the contact pressure may be increased for better sealing, but it becomes difficult to perform mounting by rotating the accessory relative to the camera body
Solution Approach 1:
The recessed portion is designed beforehand to cushion the elastic member's deformation during rotational mounting. This prevents excessive squashing that would increase friction and make rotational mounting difficult, while still maintaining sufficient contact pressure for effective sealing.
Solution Approach 2:
By introducing the recessed portion, the patent changes the spatial parameters of the mounting interface, allowing the elastic member to deform in a controlled manner during rotation. This maintains adequate sealing pressure without creating excessive friction that would hinder rotational mounting.
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
The solution effectively reduces friction and enhances the ease of mounting and demounting camera accessories, ensuring a secure and water-tight connection without the need for additional adjustment members, thereby improving the usability and reliability of the accessory system.
Implementation Method 1
an elastic member configured to contact the camera body when the accessory is mounted on the camera body
Data Source
AI summary
An accessory mountable on and demountable from a camera body includes a first mount unit including a plurality of first bayonet claw portions, a second mount unit including a plurality of second bayonet claw portions configured to be engaged with the plurality of first bayonet claw portions, an elastic member configured to contact the camera body when the accessory is mounted on the camera body, and a holding member configured to hold the elastic member. The holding member is provided with a recessed portion which a part of the elastic member can enter when the accessory is mounted on the camera body.