Ophthalmologic Apparatus Chin Rest Elevation Adjustment
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Solution Overview
Problem
Existing ophthalmologic apparatuses struggle to perform examinations on individuals whose faces are not perpendicular, particularly elderly persons with weak knees, due to the fixed arrangement of chin and forehead rests.
Innovation Solution
The ophthalmologic apparatus allows for integral elevation angle adjustment of the chin rest, forehead rest, and objective lens with respect to the stand, enabling flexible alignment and posture support through a movable frame and grip handle, accommodating non-perpendicular facial orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the chin rest part and forehead rest are fixed in position relative to the objective lens, then the apparatus structure is simple and stable, but it cannot accommodate examinees whose faces are not perpendicular to the examination axis
Solution Approach 1:
The chin rest part and forehead rest are made movable relative to the objective lens through an elevation mechanism. The chin rest can be adjusted in the elevation direction (up-down movement) while the forehead rest remains fixed or moves differently, allowing dynamic adaptation to examinees with non-perpendicular facial alignment without requiring complete restructuring of the apparatus
Solution Approach 2:
The support structure is divided into independent components: the objective lens is fixed on the main body, while the chin rest part is separable and movable relative to it. This segmentation allows the chin rest to be independently adjusted in elevation to accommodate various facial angles, while the overall apparatus structure remains relatively simple
2Ease of operation
If the chin rest part is made movable to adjust elevation angle, then examinees with non-perpendicular alignment can be accommodated, but the apparatus structure becomes more complex
Solution Approach 1:
The chin rest part is equipped with a manual elevation adjustment mechanism that allows operators to easily change the elevation angle according to the examinee's facial alignment requirements. The mechanism uses simple mechanical components that can be operated without complex controls or additional power sources, maintaining ease of operation while minimizing structural complexity
Data Source
AI summary
Provided is an ophthalmologic apparatus, which is configured to perform observation and photographing of an eye to be examined via an objective lens, and which allows the observation or the like of the eye to be examined irrespective of a posture of an examinee. The ophthalmologic apparatus includes: a main body part including an optical system and the objective lens that are configured to perform the observation and the photographing; a stand part configured to support the main body part with respect to an installation surface; a chin rest part configured to place a chin of an examinee thereon; and a forehead rest configured to bring a forehead of the examinee into abutment therewith. In the ophthalmologic apparatus, the chin rest part, the forehead rest, and the objective lens can be integrally changed in elevation angle with respect to the stand part.