Leaf Spring Frame Member Breaking Region Design
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Solution Overview
Problem
In the manufacturing of camera module drive mechanisms, the thin and small leaf springs deform easily, leading to issues with connection strength and burr formation when separated from the support frame, which affects the quality and precision of the camera module.
Innovation Solution
A leaf spring frame member design featuring a breaking region with a half etching part and bank parts, where the breaking region's outer edge is situated inside the leaf spring product part, preventing burrs from protruding outward during separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the connection strength of the connection parts is increased, then the deformation of leaf springs is reduced, but the separation of the support frame becomes difficult and burrs may protrude from the cutting position
Solution Approach 1:
The connection part is divided into two distinct regions: a first region with sufficient thickness for strong connection between the leaf spring and support frame, and a second region with reduced thickness for easy separation. This segmentation allows the connection part to fulfill both functions of strong attachment and clean detachment without burr formation.
Solution Approach 2:
Different regions of the connection part are given different thickness properties: the first region maintains original thickness for strong connection, while the second region has reduced thickness for controlled breaking. This local differentiation of material properties enables the connection part to exhibit different mechanical behaviors in different locations.
2Volume of moving object
If the leaf springs are made thinner to reduce camera module profile, then the spring strength decreases, but increasing thickness is required when heavy lenses are used
Solution Approach 1:
The thickness parameter of the connection part is changed locally in the second region to create a breaking region. This parameter change allows the connection part to be easily separated from the support frame after assembly, solving the problem of difficult removal when using thin, strong leaf springs for low-profile camera modules.
3Extent of automation
If automatic assembly is implemented to improve assembly accuracy and quality, then manual handling of thin leaf springs is reduced, but the leaf springs still deform easily during automated processes
Solution Approach 1:
The connection part is pre-designed with a breaking region having reduced thickness before the assembly process. This preliminary structural preparation ensures that the connection part can be easily separated from the support frame during automated assembly, preventing deformation of the thin leaf springs while maintaining assembly automation.
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 design stabilizes the breaking position and prevents burrs from forming on the outer edge, enhancing the assembly quality and precision of camera module drive mechanisms by ensuring consistent separation and reducing the risk of mechanical failures.
Implementation Method 1
A breaking region, which is breakable, is formed in the connection part. Specifically, a half etching part is formed in the connection part.
Data Source
AI summary
A leaf spring frame member (50) comprises: a plurality of leaf spring product parts (11A) each of which includes an outer frame part (11a), an inner frame part (11b) and spring parts (11c); and a support frame (51) which is arranged around the leaf spring product parts (11A) and supports the leaf spring product parts (11A). Each of the leaf spring product parts (11A) and the support frame (51) are connected to each other by connection parts (52). A breaking region (53), which is breakable, is formed in the connection part (52). An outer edge (53a) of the breaking region (53) is situated on the inside of an outer edge (11h) of the leaf spring product part (11A).