Lens Device Base Member Restriction Ends for Compact Design
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Solution Overview
Problem
Existing lens devices for miniaturized optical systems, such as digital cameras, face challenges in compact design due to the need for additional space for collision prevention mechanisms between movable lens members, which hinders further miniaturization.
Innovation Solution
The lens device incorporates a base member with object and image side restriction ends to prevent excessive movement of the moving members, eliminating the need for additional collision prevention components by integrating these restrictions into the base member itself, allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate member is added to prevent collision between movable members, then collision prevention is improved, but device size increases
Solution Approach 1:
The base member integrates multiple functions: it holds the shaft member, provides guide portions for movement guidance, and includes restriction ends for collision prevention. By merging these previously separate components into a single base member, the lens device achieves compact size while maintaining reliable collision prevention between movable members.
Solution Approach 2:
The base member serves multiple purposes simultaneously: structural support (holding shaft member), movement guidance (providing guide portions), and safety (restriction ends for collision prevention). This multi-functionality eliminates the need for separate intermediate members, reducing overall device volume while ensuring reliable operation.
2Reliability
If additional collision prevention components are added, then movement control is improved, but device complexity increases
Solution Approach 1:
The base member combines structural support, movement guidance, and collision prevention functions into a single integrated component. This reduces the total number of parts while maintaining effective movement control through the restriction ends that prevent excessive displacement of movable members.
Solution Approach 2:
The base member is designed as a multi-functional component that simultaneously provides mechanical support, guides movement through engaged guide portions, and controls movement limits via restriction ends. This universal design simplifies the overall device structure while ensuring reliable movement control.
Data Source
AI summary
A lens device includes a first moving member configured to hold an optical element and move in an optical axis direction, a first shaft member configured to engage with a first guide portion of the first moving member and configured to guide a movement of the first moving member in the optical axis direction, a base member configured to hold one end portion of the first shaft member, and a holding member configured to hold the other end portion of the first shaft member, wherein the base member is provided with an object side restriction end and an image side restriction end, the object side restriction end being configured to restrict the movement of the first moving member in a direction toward an object side, the image side restriction end being configured to restrict the movement of the first moving member in a direction toward an image side.