Planar Spring with Arc Segments for Stress Distribution
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Solution Overview
Problem
Conventional torsion springs used in mobile terminal slide driving modules have stress concentration issues and are not suitable for thinning due to their thickness and limited driving distance, which hinders the miniaturization and functionality of mobile terminals.
Innovation Solution
A spring design combining a compression spring portion and a torsion spring portion, where both are located in the same plane, comprising straight and arc segments, effectively distributing stress and reducing thickness, allowing for increased driving range and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional torsion spring is used, then the spring strength is high and the life time is long, but the spring thickness is thicker and the driving distance is too short
Solution Approach 1:
The spring is divided into multiple arc segments (first arc segment, second arc segment, third arc segment) connected by straight segments. This segmentation allows the spring to distribute stress across multiple deformation zones, maintaining high spring strength while reducing the overall thickness of the spring structure.
Solution Approach 2:
The spring transitions from a conventional three-dimensional spiral torsion spring to a substantially planar structure with multiple arc segments arranged in sequence. This dimensional change from volumetric spiral to planar configuration reduces the thickness direction dimension while maintaining the torsional functionality through the arc segment deformations.
2Strength
If a conventional torsion spring is used, then the spring strength is high and the life time is long, but the driving distance is too short
Solution Approach 1:
The spring is divided into multiple arc segments (first arc segment, second arc segment, third arc segment) connected by straight segments. This segmentation allows the spring to distribute stress across multiple deformation zones, maintaining high spring strength while reducing the overall thickness of the spring structure.
Solution Approach 2:
The spring transitions from a conventional three-dimensional spiral torsion spring to a substantially planar structure with multiple arc segments arranged in sequence. This dimensional change from volumetric spiral to planar configuration reduces the thickness direction dimension while maintaining the torsional functionality through the arc segment deformations.
3Length of moving object
If the spring main body is located in the same plane, then the spring thickness is reduced, but the stress concentration needs to be reduced
Solution Approach 1:
The spring is divided into multiple arc segments (first arc segment, second arc segment, third arc segment) connected by straight segments. This segmentation allows the spring to distribute stress across multiple deformation zones, maintaining high spring strength while reducing the overall thickness of the spring structure.
Solution Approach 2:
Different segments of the spring have different functional characteristics - arc segments are designed for deformation and stress distribution, while straight segments provide structural connectivity. This local differentiation of properties allows the planar spring to achieve both thinness and stress distribution without concentration points.
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 combined spring design reduces stress concentration, increases spring life, and facilitates the thinning of mobile terminal components, enabling longer driving distances and improved module performance.
Implementation Method 1
during elastic deformation, a plurality of arc segments of the torsion spring deform, in which the stress is uniform
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention disclosed a spring and a spring assembly formed by the spring. The spring which comprises a first end, a second end, and a spring main body connected between the first end and the second end, in which the spring main body comprises a compression spring portion and a torsion spring portion, and the spring main body is substantially located in a same plane. The spring according to the present invention comprises a compression spring portion and a torsion spring portion, so that a plurality of segments of the spring deforms during deformation of the spring, the stress is allocated among the plurality of segments and the spring life is increased. In addition, the spring thickness may be reduced, which is advantageous for thinning of the spring driving module and mobile terminal.