Optical Element Driving Device with Retainer Recesses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing optical element driving devices face resistance issues due to grease scattering and sticking between the retainer and surrounding members, which can occur during external impacts like dropping, leading to increased movement resistance.
Innovation Solution
The optical element driving device incorporates a supporting part with rolling members held by a retainer, featuring recesses on the outer and inner peripheral surfaces to prevent grease from sticking, ensuring smooth movement by maintaining a gap between the retainer and the surfaces, thereby reducing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If grease is applied to the ball for lubricity, then the rolling smoothness is improved, but the grease may scatter during external impact and cause sticking between the retainer and surrounding member
Solution Approach 1:
A retainer is introduced as an intermediary component between the rolling member and the surrounding structure. The retainer holds the rolling member in a rollable manner while preventing direct contact between grease and the surrounding member, thus avoiding sticking while maintaining rolling smoothness
Solution Approach 2:
The harmful effect of grease scattering is extracted and isolated by containing it within the retainer structure. The retainer prevents grease from reaching the surrounding member, separating the lubrication function from the potential contamination risk
2Productivity
If the retainer moves in the optical axis direction together with the ball, then the driving function is achieved, but resistance is generated when sticking occurs
Solution Approach 1:
The retainer acts as a mediator that enables the driving function by allowing the rolling member to move in the optical axis direction while preventing sticking with surrounding members, thus maintaining smooth movement without excessive resistance
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 effectively prevents the generation of resistance to the movement of optical elements, ensuring stable and efficient operation even under external impacts.
Implementation Method 1
a plurality of rolling members configured to be held by a retainer in a rollable manner
Data Source
AI summary
An optical element driving device configured to drive an optical element, the optical element driving device including: a holding part configured to hold an optical element; a housing part configured to house inside the holding part; and a supporting part interposed between an outer peripheral surface of the holding part and an inner peripheral surface of the housing part, and including a plurality of rolling members configured to be held by a retainer in a rollable manner, the supporting part being configured to support the holding part with the plurality of rolling members such that the holding part is movable with respect to the housing part. At least one of the outer peripheral surface and the inner peripheral surface includes a first recess formed at a portion facing the retainer.