Bone Plate Locking Slider with Curved Contours
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Solution Overview
Problem
Current bone plate technologies face difficulties in adjusting screw direction and pressure distance, leading to inconvenient operations and suboptimal treatment effects due to fixed and unadjustable screw positions.
Innovation Solution
A locking and compression device featuring an elongate slippery hole with a locking slider and cone-shaped screw hole, allowing for adjustable pressure distance and screw direction, facilitated by arc-shaped contours and a middle notch for secure locking and easy adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional metal bone plate with fixed screw mounting holes is used, then the structure is simple and easy to manufacture, but the screw direction cannot be adjusted and the pressure effect is poor
Solution Approach 1:
The bone plate incorporates an elongate slippery hole instead of a fixed mounting hole, allowing the locking slider and cone-head screw to be positioned at any location along the elongate direction. This dynamic positioning capability enables adjustment of screw direction and pressure distance according to clinical requirements, resolving the contradiction between adaptability and structural complexity.
2Adaptability or versatility
If pressure bone plates with inclined screw holes are used, then some pressure effect is achieved, but the pressure distance is short and the screw direction is unadjustable
Solution Approach 1:
The locking slider can be positioned at any location within the elongate slippery hole along its elongate direction, allowing the pressure distance to be arbitrarily adjusted. This dynamic adjustment capability provides both extended pressure distance and improved surgical convenience, as the slider can be easily repositioned before final locking.
Solution Approach 2:
The locking slider is divided into two symmetrical sections by a middle notch, with each section capable of independent movement. This segmentation allows the slider to be compressed inward for locking while maintaining adjustability along the elongate direction, resolving the contradiction between pressure distance adjustment and operational ease.
3Reliability
If a locking mechanism with curved surfaces is used, then the locking slider is prevented from releasing, but the device complexity increases
Solution Approach 1:
The elongate slippery hole features intrados curved surfaces on its two sides, while the locking slider has corresponding external arc surfaces. This curved surface design creates a cambered surface locking mechanism that prevents the slider from releasing after installation, ensuring reliable locking while maintaining relatively simple structural forms for both the hole and slider.
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 simplifies bone plate operations by enabling precise adjustment of screw direction and pressure distance, enhancing treatment efficacy and reducing surgical complexity.
Implementation Method 1
The two sides of the elongate slippery hole are intrados, that is, the shapes of the contour line at the two inner sides of the holes cross section are arc-shaped and the two sides of the locking slider are shaped with corresponding external curvatures; the locking slider is prevented from releasing after the screw has been screwed in
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A locking and compression device for a bone plate is disclosed. The body of the bone plate (1) has an elongate slippery hole (2), in which there is a locking slider (3); on the slider (3) there is a cone-shaped screw hole (3-3) with a cone-head screw (4) mounted inside. The shapes at the two inner sides of the elongate slippery hole (2) cross section are arc-shaped, and the two sides of the locking slider (3) are shaped with corresponding external curvatures (3-1); in the middle of the locking slider (3) there is a notch (3-2). The locking slider (3) can slide in the elongate slippery hole (2) to meet the pressure requirement, and also can sway from side to side to adjust the direction of the cone-head screw (4) according to the requirement. The two sides of the locking slider (3) are of curved shapes, so that the locking slider is prevented from releasing after the screw (4) has been screwed in.