Bent Electrical Connection Member for Screw-Clamping Stress Relief
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Solution Overview
Problem
Conductive structures in electronic devices experience stress concentration and disconnection issues due to deformation caused by screw clamping, leading to unreliable electrical connections when connected to flexible substrates.
Innovation Solution
An electrical connection member with a first fixing portion having a first and second bent portion bent in opposite directions, featuring a through hole for screw penetration, to stabilize the connection and reduce stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tension structure is implemented to prevent loosening after clamping, then clamping reliability is improved, but deformation of the electrical connection member occurs during screw clamping
Solution Approach 1:
The first fixing portion is divided into multiple bent portions (first bent portion, second bent portion, third bent portion) that are segmented along the bent line. This segmentation allows each bent portion to independently deform and absorb clamping stress, preventing overall deformation of the electrical connection member while maintaining clamping reliability.
Solution Approach 2:
The first fixing portion is designed with a bent line that includes multiple bent portions forming curved structures. These curved bent portions can elastically deform during screw clamping to absorb stress, preventing rigid deformation and maintaining the shape stability of the electrical connection member.
2Reliability
If the electrical connection member is clamped through a screw, then electrical connection is achieved, but stress concentration occurs on the flexible substrate
Solution Approach 1:
The stress concentration issue is extracted and isolated to the first fixing portion through the bent line design. The bent portions absorb and distribute the clamping stress locally at the first fixing portion, preventing stress from being transmitted to the flexible substrate while maintaining electrical connection reliability.
Solution Approach 2:
The bent portions in the first fixing portion act as pre-designed stress absorption elements that cushion the clamping force before it reaches the flexible substrate. This beforehand cushioning prevents stress concentration on the substrate while ensuring reliable electrical connection.
3Force
If the tension structure generates deformation during screw clamping, then clamping force is applied, but accurate clamping at corresponding locations cannot be achieved
Solution Approach 1:
The bent line is designed with different bent portions (first, second, third bent portions) that have different characteristics along the bent line. This local quality variation allows specific bent portions to deform under clamping force while others maintain position accuracy, enabling both adequate clamping force and precise clamping location.
Data Source
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AI summary
An electronic device includes a housing, a first substrate disposed in an internal space of the housing, a conductive structure disposed at a location isolated from the first substrate, a second substrate electrically connected to the conductive structure and the first substrate, and an electrical connection member electrically connecting the second substrate to the conductive structure. The electrical connection member may include a first fixing portion fixed to the conductive structure, a second fixing portion fixed to the second substrate, and a connection portion connecting the first fixing portion and the second fixing portion. The first fixing portion includes a first bent portion bent along a first bent line from a neck portion, that is, a boundary area with the connection portion, and a second bent portion bent along a second bent line from the first bent portion. The first bent portion is bent in a first direction becoming distant from the conductive structure, and The second bent portion is bent in a second direction opposite to the first direction.