Examination Table Parallelogram Linkage X-Ray Shadow Elimination
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Solution Overview
Problem
Existing examination and treatment tables with individually movable seat and back cushions suffer from 'shadows' caused by frames and bases during X-ray procedures, require excessive space due to curved movement, and cannot achieve a vertical position, limiting their usability.
Innovation Solution
The table is attached to a lifting and lowering base via a pivot pin on one side, utilizing parallelogram link systems for vertical movement, and equipped with motors for independent cushion control, allowing full accessibility for X-rays and reduced space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the table uses frames and bases for suspending cushions, then the table structure is stable and functional, but shadows are created during X-ray procedures
Solution Approach 1:
The patent removes the base structure from underneath the table, extracting the source of X-ray shadows. The table is suspended only at one side by a pivot pin, eliminating the interfering base and frames from the X-ray path while maintaining structural support through the parallelogram link system.
Solution Approach 2:
The table is divided into separate cushions (seat cushion and back cushion) that are individually movable and suspended independently. This segmentation allows each component to be positioned optimally for both structural stability and X-ray accessibility, with frames positioned along the sides rather than underneath.
2Device complexity
If the table moves along a curved line during lifting, then the lifting mechanism is simple, but more space is required around the table
Solution Approach 1:
The patent employs a dynamic parallelogram link system that enables the table to move vertically while maintaining its orientation. The linkage mechanism transforms the lifting motion into a controlled vertical trajectory, allowing the table to adapt its position dynamically without requiring excessive clearance space.
3Device complexity
If the table cannot reach vertical position, then the structure remains simple, but versatility for different procedures is limited
Solution Approach 1:
The parallelogram link system provides dynamic positioning capability, allowing the table to be raised to various heights and angles including vertical positions. The mechanism maintains structural simplicity while enabling full range of motion through the coordinated movement of the linkage components.
Data Source
AI summary
An examination and treatment table having a base (1) adapted to lift and lower a table (2) attached thereto, the table comprises a seat cushion (4) and a back cushion (3), which are individually movable. The table (2) is only attached at one side to the base (1) by means of a pivot pin (12) and that the seat cushion (4) and the back cushion (3), respectively, has a suspending frame (29, 30) each connected to the pivot pin (12) and extending along, at least partially, one side of the cushion (3, 4), which is the same side as the pivot pin (12) is provided.