Surgical Punching Instrument Spring Guide Groove
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Solution Overview
Problem
Existing surgical punching instruments face difficulties in handling and maintenance due to the placement and removal of restoring springs, which can fatigue and fail to provide adequate restoring force, making them difficult to use and clean.
Innovation Solution
The restoring spring is designed as a compression coil spring and guided within a groove of the punching slide, allowing for direct action on the slide and easy removal and reconnection for cleaning purposes, with stop faces ensuring reliable contact and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restoring spring is arranged between the handle and the actuating lever as in prior art, then the spring can provide restoring force, but the spring becomes difficult to remove and replace for cleaning and maintenance
Solution Approach 1:
The restoring spring is segmented from the handle assembly and relocated to the punching slide. The spring is now attached to the punching slide rather than being integrated into the handle, allowing the spring to be removed with the punching slide as a unit. This segmentation enables easy removal and replacement of the spring for cleaning and maintenance while maintaining its restoring function.
2Stability of the object's composition
If the punching slide and punching bar are rigidly connected as in prior art, then structural stability is maintained, but the components cannot be separately removed for cleaning
Solution Approach 1:
The connection between the punching slide and punching bar is changed from rigid to detachable. The punching slide is now equipped with a mounting part that can be selectively attached and detached from the punching bar using guide elements with T-shaped profiles. This dynamic connection allows the components to be separated for cleaning while maintaining structural stability during operation.
3Volume of moving object
If the restoring spring is designed as a coil spring arranged between axial stops as in prior art, then the spring can be compact, but the entire assembly must be removed together making maintenance difficult
Solution Approach 1:
The restoring spring is extracted from the handle assembly and relocated to the punching slide. The spring remains compact as a coil spring between axial stops, but is now taken out from its previous integrated position in the handle. This extraction allows the spring to be removed and replaced by detaching the punching slide from the punching bar, enabling maintenance without removing the entire handle assembly.
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 design enhances the reliability of the surgical punching instrument's operation, simplifies cleaning and maintenance, and facilitates the assembly and disassembly of the punch shafts, allowing for easy replacement of the spring.
Implementation Method 1
The restoring spring is designed as a compression coil spring and guided within a groove of the punching slide
Implementation Method 2
guide elements, which are profiled in a T-shaped manner, engage one another in a positive-locking manner
Data Source
AI summary
A surgical punching instrument is provided with a fixed handle (14) attached to a punching bar (2) and with an actuating lever (16), which is mounted thereon in a pivotingly movable manner and which is connected via a short lever arm (17) to a punching slide (1), which is in turn under the action of a restoring spring (23). The punching slide (1) lies with its flat sliding surface (3) on a flat guiding surface (4) of the punching bar (2) over its entire length and is guided at same in an axially movable manner by means of guide elements (5 through 8), which have a T-shaped profile, engage one another in a positive-locking manner and are detachable by longitudinal displacement. To make it possible to remove the restoring spring, which is not arranged between the handle and the actuating lever, from the punching bar in a simple manner, for example, for cleaning purposes, and to bring it into connection with same again, the restoring spring (23), designed as a compression coil spring, is arranged and guided at least partially in a guide groove (24) of the sliding surface of the punching slide (1) by means of a guide shaft (22, 22/1), which passes axially through it. A distal stop face (27), which is rigidly connected to the punching slide (1), is provided as a step bearing for the rear spring end of the restoring spring (23), and the restoring spring (23) is in contact by its front end with a proximal stop face (30) of the punching slide (1) when the punching slide (1) is removed, and with a proximal stop face (26) of the punching bar (2) when the punching slide (1) is mounted ready for operation.