Drive Apparatus Power Terminal Positioning for Stable Lens Actuation
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Solution Overview
Problem
Existing drive apparatuses for lens systems face instability in power supply due to unstable contact pressure between connecting portions, leading to potential insufficient power delivery, which necessitates larger electrical components to stabilize power flow.
Innovation Solution
A drive apparatus with a first fixing portion, an actuator for rotating the operation ring, and an electrical connection portion featuring terminals for stable power supply, where the first terminal for voltage and second terminal for reference potential are positioned closer to the fixing portion, ensuring consistent power delivery without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of electrical components is increased to stabilize power supply, then power supply stability is improved, but device size increases
Solution Approach 1:
The patent applies local quality by positioning the first terminal and second terminal (power supply terminals) closer to the first fixing portion compared to other terminals. This localized arrangement ensures that the power supply path has shorter length and more stable contact pressure precisely where needed, achieving stable power supply without requiring larger electrical components throughout the entire device.
2Reliability
If contact pressure of connecting portions is increased to stabilize power supply, then power supply stability is improved, but device size increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning the first terminal and second terminal closer to the first fixing portion during the design stage. This preliminary arrangement ensures that when the drive apparatus is attached to the lens apparatus, the power supply terminals naturally achieve stable contact pressure with shorter connecting portions, eliminating the need for additional stabilization measures that would increase device size.
Data Source
AI summary
The plurality of contact pins include a VBAT terminal to which a driving power source for driving the motor is supplied and a PGND terminal corresponding to a ground level of the driving power source, and the VBAT terminal and the PGND terminal are disposed closer to the fastening member than, any other contact pins of the plurality of contact pins than the VBAT terminal and the PGND terminal.