Lens Actuator Terminal Layout for Faster Autofocus Assembly
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Solution Overview
Problem
Conventional subminiature digital cameras require a large number of connection points for power supply, leading to difficulties in the connection process and increased time due to non-concentric arrangement and narrow working space for auto-focus implementation.
Innovation Solution
A lens moving apparatus with a housing supporting a driving magnet and a bobbin with a coil, where electromagnetic interaction moves the bobbin parallel to the optical axis, and elastic members connect the bobbin to the housing, allowing both ends of the coil to be connected to an external power source through a printed circuit board with terminals aligned on the same side, facilitating easier connection and reducing the connection time without increasing the manufacturing cost of the elastic members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If connection points are distributed around the subminiature digital camera to receive power from external power source, then power supply coverage is improved, but connection process complexity increases and connection time increases
Solution Approach 1:
The patent merges multiple distributed connection points into a single concentrated connection region. The coil and elastic members are configured so that all electrical connections are made at one location on the housing, eliminating the need for multiple distributed soldering points around the camera module.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, acts as a connection interface for power supply, and serves as a mounting platform for the coil and elastic members. This multi-functionality reduces the need for separate connection components distributed throughout the module.
2Adaptability or versatility
If connection points are distributed around the subminiature digital camera, then power supply coverage is improved, but working space for connection becomes narrower
Solution Approach 1:
Multiple connection functions are merged into a single working space area on the housing. The coil terminals and elastic member connections are both accessed through one concentrated region, providing adequate working space for connection tools and operations.
3Reliability
If conventional connection method is used with distributed connection points, then power supply is achieved, but connection time increases
Solution Approach 1:
The coil and elastic members are pre-configured and positioned before final assembly. The connection points are pre-aligned on the housing, allowing for rapid connection during assembly without requiring complex positioning or alignment procedures during the connection process.
4Reliability
If terminals are arranged on different sides of the housing, then electrical connection is achieved, but connection process becomes more difficult
Solution Approach 1:
Terminals that would traditionally be arranged on different sides of the housing are merged into a single concentrated arrangement. Both the coil terminals and elastic member connection points are positioned to access the same working space region, allowing simultaneous or sequential connection from one location.
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 apparatus simplifies the connection process between the lens moving apparatus and the external power source, significantly reducing the time required for connection while maintaining space efficiency and cost-effectiveness.
Implementation Method 1
the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil
Data Source
AI summary
Embodiments provide a lens moving apparatus including housing to support a driving magnet, a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil, a lower elastic member to connect a lower portion of the housing and a lower portion of the bobbin to each other, both ends of the coil being electrically connected to the lower elastic member, the lower elastic member having a first terminal electrically connected to an external power source so as to supply external power to the ends of the coil, and a printed circuit board provided at one side surface of the housing, the printed circuit board having a second terminal electrically connected to the external power source.