Snap Fit Connection Fastening Part for Display Barrel
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Solution Overview
Problem
Conventional image pickup apparatuses with electronic view finders using snap fit connections face issues with the connection releasing during the pull-out state, leading to potential detachment and ease of assembly challenges, especially due to individual differences in user force and deformation of the outer case.
Innovation Solution
The design incorporates a fastening part at the connection edge of the first barrel to suppress snap fit connection release in the pulled-out state while allowing release in the stored state, enhancing connection strength and maintaining ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the inner surface of the outer case and the connection part is set smaller than the connection amount of the snap fit connection, then the snap fit connection is reinforced, but the ease of assembly in manufacturing is lowered
Solution Approach 1:
The invention applies local quality by providing a fastening part only at the connection end of the first barrel where connection to the second barrel occurs, rather than uniformly across the entire structure. This localized fastening mechanism specifically addresses the snap fit connection reliability issue at the critical location while maintaining ease of assembly elsewhere in the structure.
2Reliability
If the elastic piece is hardened to prevent snap fit connection from releasing, then connection reliability is improved, but ease of assembly in manufacturing is lowered
Solution Approach 1:
The invention segments the connection system into distinct functional components: the snap fit connection elastic piece for flexible connection, the fastening part for preventing release, and the engagement part for mechanical interlocking. This segmentation allows each component to be optimized independently - the elastic piece remains soft for easy assembly while the fastening part provides the necessary reliability.
3Reliability
If the outer case is made more rigid to prevent deformation under pulling force, then snap fit connection reliability is improved, but device complexity increases
Solution Approach 1:
The invention applies dynamics by creating a adaptive connection system where the fastening part engages with the connection part based on the operational state. During normal operation, the snap fit connection provides flexibility, but when pulling force is applied, the fastening part activates to prevent release. This dynamic response eliminates the need for a uniformly rigid outer case while maintaining connection reliability.
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
This solution effectively prevents snap fit connection release in the pulled-out state while allowing it in the stored state, reinforcing connection strength and ensuring ease of assembly and manufacturing efficiency.
Implementation Method 1
The elastic piece is elastically deformed by the projection when the connecting member is slidden along the lens moving member. When the elastic piece is slidden to a predetermined position, the elastic piece elastically returns and the connection part is engaged with the engagement part.
Data Source
AI summary
An image pickup apparatus that can store a display device in an apparatus body and that prevents snap fit connection from releasing in a pulled-out state where the display device is pulled out while keeping ease of assembly in manufacturing. The image pickup apparatus includes a first barrel, a second barrel that is connected to the first barrel and achieves a stored state and the pulled-out state of the display device by relatively moving with respect to the first barrel, and a third barrel that is connected to the second barrel by snap fit connection. The first barrel has a fastening part at its end of connection with the second barrel so that the fastening part suppresses release of the snap fit connection in the pulled-out state and does not suppress the release of the snap fit connection in the stored state.