Lens Driving Apparatus Single-Point Spring Wiring
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Solution Overview
Problem
Existing lens driving apparatuses for camera phones and digital cameras face complexity in wiring patterns due to the need to supply electricity to coils positioned far apart in the optical axis direction, leading to space constraints and inefficiencies in current supply.
Innovation Solution
A lens driving apparatus with a spring member configured into multiple spring pieces at one location, allowing current to be supplied to coils at a single point, eliminating the need for dual-point current supply and reducing wiring complexity by gathering electrical wiring on the opposite side from the photographic subject.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If terminals are positioned at two places distanced in the optical axis direction to supply current to coils, then current can be supplied to the coils, but the wiring pattern becomes more complicated on the substrate
Solution Approach 1:
The spring member is divided into a first spring member and a second spring member at a position away from the coil, enabling current to be supplied at a single location rather than requiring two distant terminals. This segmentation allows the wiring to connect to both coils through the divided spring members, simplifying the wiring pattern while maintaining effective current supply to all coil components.
2Device complexity
If one terminal is pulled around to the vicinity of the other terminal to simplify wiring, then wiring complexity is reduced, but enough space cannot be obtained for pulling the terminals around in a downsized apparatus
Solution Approach 1:
Instead of pulling terminals around in the optical axis direction (one dimension), the invention divides the spring member and routes wiring through openings in the spring pieces (changing to a different spatial dimension). This allows wiring to connect to coils at locations away from the coil without requiring excessive space in the optical axis direction, thus simplifying wiring while maintaining a compact apparatus size.
3Device complexity
If spring member is divided into multiple spring pieces at one place, then current can be supplied at only one place, but the spring member structure becomes more complex
Solution Approach 1:
The spring member is segmented into a first spring member and a second spring member at a specific position away from the coil. This segmentation enables current to be supplied at a single location while maintaining the spring's functional integrity. The divided structure allows wiring to access both coil ends through the spring pieces without requiring complex multi-point connections, thus simplifying the current supply configuration while keeping the spring member structure manageable.
4Area of stationary object
If wiring is gathered on the side opposite from the photographic subject side, then wiring space is reduced, but other electrical wiring needs to be done on that side
Solution Approach 1:
The invention consolidates all wiring connections to the coils on the side opposite from the photographic subject side by dividing the spring member and routing all electrical connections through this single side. This merging of wiring locations reduces the overall wiring space required and simplifies the manufacturing process by concentrating all electrical work in one area, making the apparatus more suitable for downsizing while maintaining ease of manufacture.
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 configuration simplifies current supply to the movable body's coils, reduces wiring space, and enhances assembly efficiency by eliminating the need for additional terminals and space for terminal manipulation, while maintaining effective electromagnetic force and resilient support for precise lens movement.
Implementation Method 1
a fixed body for supporting the movable body via a spring member to move in the optical axis direction
Implementation Method 2
a magnetic drive mechanism which has coils held by the movable body and drives the movable body in the optical axis direction
Data Source
AI summary
A lens driving apparatus and method may include a movable body holding lenses; a fixed body for supporting the movable body via a spring member to move in the optical axis direction; and a magnetic drive mechanism which has coils held by the movable body and which drives said movable body in the optical axis direction. Additionally, the spring member may be configured with a plurality of spring pieces which are electrically divided at one location in the optical axis direction, and a plurality of coil end portions pulled out from the coils are respectively and electrically connected to different spring pieces of a plurality of spring pieces from each other.