Diagonal Draw Bar Micro Ventilation via Latching Lever
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Solution Overview
Problem
Conventional diagonal draw bars require a high conventional stroke to achieve micro ventilation, which can lead to instability in the implementation of this state due to the locking point matching structure.
Innovation Solution
A diagonal draw bar structure incorporating a first lever, second lever, retaining lever, spring, latching member, and actuating lever, where the positioning hook on the first lever latches with the latching member, allowing for a limited rotation angle without the need for increased stroke distance, maintaining the original locking point structure and ensuring positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking point matching structure is adopted to achieve micro ventilation state, then the micro ventilation function can be realized, but the required stroke distance becomes extremely high leading to instability
Solution Approach 1:
The diagonal draw bar is divided into multiple levers (first lever, second lever, retaining lever) connected by rivets, with the latching member segmented into parts that can independently engage with the positioning hook. This segmentation allows the micro ventilation function to be achieved through localized engagement rather than requiring the entire stroke distance to be increased.
Solution Approach 2:
The latching member acts as an intermediary element between the actuating lever and the positioning hook. When the actuating lever moves, it pushes the latching member which then engages with the positioning hook to limit the rotation angle. This intermediary mechanism allows for precise positioning without requiring excessive stroke distance.
2Measurement precision
If the stroke distance is increased to ensure positioning accuracy, then positioning accuracy can be improved, but the system complexity and instability increase
Solution Approach 1:
The system uses dynamic engagement between the latching member and the positioning hook. The latching member can move freely until it engages with the positioning hook, at which point the rotation angle is limited. This dynamic mechanism provides precise positioning without requiring a complex or excessively long stroke distance.
Solution Approach 2:
The invention changes the parameter of rotation angle limitation through the latching mechanism. Instead of increasing stroke distance to achieve positioning accuracy, the system uses the latching member to directly limit the rotation angle of the first lever, providing precise positioning through angular constraint rather than linear displacement.
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 solution enhances the micro ventilation functionality by stabilizing the stroke distance, ensuring accurate positioning without modifying the existing locking point structure, thus effectively addressing the instability issues in conventional systems.
Implementation Method 1
The spring latched within the through hole. The latching member extends through the spring.
Data Source
AI summary
A diagonal draw bar having a micro ventilation function includes a first lever, a second lever, a retaining lever, a spring, a latching member, and an actuating lever. The first lever defines a first rivet hole, a second rivet hole, and provides a positioning hook. The second lever defines a third rivet hole and connects with the first lever. The retaining lever defines a fourth rivet hole and connects with the retaining lever, the retaining lever defines a through hole. The spring is latched within the through hole. The latching member extends through the spring. The actuating lever is provided with a projection for pushing the latching member upward.