Medical Test Strip Ejection Mechanism with Stopping Portions

The ejection mechanism is divided into multiple independent components: a push plate for applying force, a push rod for transmitting force, and a spring for providing resilient force. This segmentation allows each component to perform its specific function optimally, with the spring providing consistent force through controlled compression and expansion, thereby eliminating the loose structure and sticking issues while maintaining automatic ejection functionality

A push rod is introduced as an intermediary component between the spring and the test strip. The push rod transmits the resilient force from the spring to the push plate, ensuring uniform force distribution. This intermediary mechanism prevents direct contact between the spring and test strip, eliminating uneven stress concentration and the resulting sticking problems, while maintaining the automatic ejection function

The design controls the spring's resilient force parameters by selecting appropriate spring constants and pre-compression values. The spring is designed to generate sufficient force for rapid ejection while remaining within elastic limits to prevent excessive vibrations. This parameter optimization ensures high ejection speed is achieved without compromising structural stability or causing loose connections

The push plate is designed with a surface area that distributes the spring's resilient force over a larger region of the test strip. This beforehand cushioning effect prevents stress concentration that could cause vibrations and structural loosening, while still delivering sufficient total force to achieve high ejection speed. The distributed force application stabilizes the structure during the ejection process