Camera Mirror Shock-Absorbing Mechanism Design
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Solution Overview
Problem
Existing shock-absorbing mechanisms for movable mirrors in SLR cameras require separate components for different rotational positions, increasing production costs and potentially interfering with operational speed due to excessive loads.
Innovation Solution
A dual-shock-absorbing mechanism where identical first and second shock-absorbing members, supported by biasers and cam surfaces, absorb shocks during mirror rotations between viewfinder light-guiding and retracted positions, optimizing bounce suppression and reducing initial rotational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate shock-absorbing members are provided for different rotational positions of the movable mirror, then bounce suppression at each position is improved, but production cost increases
Solution Approach 1:
The patent applies universality by designing a single shock-absorbing member that performs multiple functions: it suppresses bounce at both the viewfinder light-guiding position and the retracted position of the movable mirror. This eliminates the need for separate shock-absorbing members for each position, thereby reducing production cost while maintaining effective bounce suppression at both positions.
2Reliability
If excessive load is applied by the bounce-suppressing member on the movable mirror, then bounce suppression is improved, but operational speed deteriorates
Solution Approach 1:
The patent applies dynamics by designing the shock-absorbing member with a biasing mechanism that dynamically adjusts the load applied to the movable mirror. The biasing force ensures that excessive load is not applied during initial rotation, allowing the mirror to rotate freely without resistance, while still providing adequate bounce suppression when needed. This dynamic adjustment maintains operational speed while preventing excessive loading.
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 mechanism improves continuous photographing capability by effectively suppressing mirror bounce at both positions while simplifying the structure and reducing production costs through component commonality.
Implementation Method 1
a first shock-absorbing member (41) which is pressed and moved by the pressing portion (16T) to absorb shock of the movable mirror (15)... supported to be movable linearly in a direction intersecting a rotational path of the movable mirror (15), and which is biased in a first biasing direction away from a rotational axis of the movable mirror (15) by a first biaser (42)
Implementation Method 2
a pressing portion (16T) which moves with the rotation of the movable mirror (15)... a first shock-absorbing member (41) which is pressed and moved by the pressing portion (16T)
Implementation Method 3
a first shock-absorbing member (41) which is pressed and moved by the pressing portion (16T) to absorb shock of the movable mirror (15) when the movable mirror (15) rotates from the retracted position (15B) to the viewfinder light-guiding position (15A)
Data Source
AI summary
A movable mirror shock-absorbing mechanism of a camera includes a movable mirror which is rotatable between a viewfinder light-guiding position and a retracted position, a pressing portion which moves with the rotation of the movable mirror, a first shock-absorbing member which is pressed and moved by the pressing portion to absorb shock of the movable mirror when the movable mirror rotates from the retracted position to the viewfinder light-guiding position, and a second shock-absorbing member which is pressed and moved by the pressing portion to absorb shock of the movable mirror when the movable mirror rotates from the viewfinder light-guiding position to the retracted position. The first and second shock-absorbing members are mutually identical in specifications.