Compact Sample Injection Mechanism for Biochemical Analyzer
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Solution Overview
Problem
Current sample feeding propulsion mechanisms for biochemical analyzers are bulky and occupy excessive mounting space due to their large size, despite being simple in structure.
Innovation Solution
A compact sample feeding propulsion mechanism is designed using a push plate, horizontal guide rails, a motor, a propulsive guide plate, a thrust roller, and a rotating wheel, where the propulsive guide plate slides on horizontal guide rails with a 90° included angle, and a thrust roller performs an eccentric motion to achieve efficient sliding, combined with a lifting structure and optical interrupter for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a stepping motor and synchronous belt are used to drive the sample feeding propulsion plate, then the structure is simple, but the mounting space occupied is large
Solution Approach 1:
The patent replaces the traditional stepping motor and synchronous belt mechanical transmission system with a cam mechanism. The cam profile is designed to directly convert rotational motion into the required reciprocating linear motion of the propulsion plate, eliminating the need for belts and complex transmission components, thus reducing mounting space while maintaining structural simplicity
Solution Approach 2:
The patent introduces a lifting dimension by adding a lifting structure with guide rollers that move along inclined guide grooves. This vertical lifting motion, combined with the horizontal reciprocating motion, creates a two-dimensional motion path that reduces the horizontal space requirement while achieving the same sample feeding function
2Area of stationary object
If the propulsive guide plate slides on horizontal guide rails with a 90° included angle, then the space occupancy is reduced, but the delivery efficiency must be maintained
Solution Approach 1:
The patent employs dynamic elements including the cam mechanism that provides variable speed motion during the reciprocating cycle, and the lifting structure with elastic sheets that enable smooth transitions. These dynamic components ensure that the reduced space configuration does not compromise the speed and efficiency of sample delivery
Solution Approach 2:
The lifting structure positions the push plate in advance at the correct height and angle before the reciprocating motion begins, ensuring that the sample is already prepared for optimal delivery. The elastic sheets pre-load the guide rollers to ensure smooth engagement with the guide grooves, maintaining delivery efficiency despite the compact 90° configuration
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
The mechanism achieves a simple, compact design with reduced space occupancy, improved delivery efficiency, and reliable operation by utilizing the eccentric motion and lifting structure, while the optical interrupter monitors movement for precise control.
Implementation Method 1
the thrust roller is eccentrically mounted on one side of the rotating wheel; the propulsive guide plate is provided with a guide groove forming an included angle with the horizontal guide rails in their length directions, and the thrust roller is in rolling fit in the guide groove
Implementation Method 2
the propulsive guide plate is in sliding fit on the horizontal guide rails
Implementation Method 3
the optical interrupter monitors movement for precise control
Data Source
AI summary
A sample feeding propulsion mechanism for biochemical analyzer, comprising a push plate (1), a horizontal guide rail (2), a motor (3), and it further comprises a propulsive guide plate (4), a thrust roller (5) and a rotating wheel (6), the propulsive guide plate (4) is in sliding fit on the horizontal guide rail (2), the push plate (1) is joined to the propulsive guide plate (4); the rotating wheel 6 is mounted on an output shaft of the motor; the thrust roller is eccentrically mounted on one side of the rotating wheel, the propulsive guide plate is provided with a guide groove forming an included angle with the horizontal guide rail in their length directions; and the thrust roller is in rolling fit in the guide groove. The sample feeding propulsion mechanism for biochemical analyzer in this disclosure is simple in structure, small in size and occupied mounting space.