Bone Punching Instrument Folding Mechanism for Easier Cleaning
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Solution Overview
Problem
Existing surgical instruments for punching bones are unwieldy during cleaning due to their design, making the process cumbersome and inefficient.
Innovation Solution
A surgical instrument with a shaft and a sliding part that includes a folding device for beak-like unfolding in a cleaning position, featuring a spreading device with a spreading spring to secure the sliding part and limit the opening angle, ensuring it cannot be accidentally locked, and a guide profile to prevent loss, facilitating easy cleaning and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the surgical instrument is designed with a sliding part that is longitudinally displaceable on the shaft, then the instrument can perform bone punching function, but the instrument becomes unwieldy during cleaning
Solution Approach 1:
The surgical instrument is divided into separable components: a shaft with a first cutting element and a sliding part with a second cutting element. The sliding part can be longitudinally displaceable on the shaft during operation, but can be separated or positioned apart during cleaning, allowing each component to be cleaned independently without the unwieldy complexity of a fully integrated design.
2Ease of operation
If the sliding part is made longitudinally displaceable on the shaft for bone punching, then the cutting function is enabled, but accidental locking during folding may occur
Solution Approach 1:
A spreading device acts as an intermediary mechanism between the sliding part and the shaft. This spreading device includes a spreading spring that actively prevents accidental locking by maintaining a controlled spacing or engagement state between the sliding part and the shaft during the folding motion, ensuring reliable operation without unintended locking.
3Reliability
If the sliding part is secured in cleaning position to prevent accidental locking, then safety is improved, but the device complexity increases
Solution Approach 1:
The spreading device with the spreading spring provides an automatic securing mechanism for the sliding part in the cleaning position. The spring-loaded design self-activates to prevent accidental locking without requiring additional manual securing steps or complex external locking mechanisms, maintaining reliability while minimizing added complexity.
4Volume of moving object
If the spreading device is arranged between the shaft and sliding part, then a compact design is achieved, but the spreading force may be insufficient
Solution Approach 1:
The spreading spring in the spreading device is designed with optimized parameters (spring constant, pre-compression, material properties) to generate sufficient spreading force within the compact space between the shaft and sliding part. By adjusting the spring parameters rather than increasing the device size, the design achieves both compactness and adequate spreading force to prevent accidental locking.
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 instrument allows for simpler and more efficient cleaning by securing the sliding part in an open position, preventing accidental closure, and ensuring easy handling and assembly post-cleaning.
Implementation Method 1
the spreading device includes a spreading spring
Data Source
AI summary
The present disclosure relates to a surgical instrument for punching bones, including a shaft having a first cutting element, a sliding part having a second cutting element slidably arranged on the shaft in a working position, and a folding device for beak-like unfolding of the sliding part and the shaft in a cleaning position, including a spreading device for spreading the sliding part and the shaft.