Dental Socket Radial Expansion Tolerance Compensation
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Solution Overview
Problem
Existing sockets for plug-in connections of toothed ring or jaw segments on model bases face challenges in achieving a secure and firm connection while being easy to manufacture and using soft, flexible materials, often resulting in high force requirements for disconnection and potential material damage.
Innovation Solution
A socket made of non-metallic materials like plastic or ceramic, featuring slit-shaped recesses for radial expansion and cam-shaped elevations to reduce friction and ensure secure, friction-locking connections, with design elements like webs and notches for stability and error tolerance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conical recess design is used to achieve a firm connection, then connection security is improved, but disconnection force requirement increases and material damage risk occurs
Solution Approach 1:
The conical recess is segmented into two distinct conical sections with different cone angles (first conical section with larger cone angle, second conical section with smaller cone angle). This segmentation allows the first section to provide strong connection security while the second section enables easier disconnection, resolving the contradiction between firm connection and low disconnection force requirement.
Solution Approach 2:
Different regions of the recess have different geometric properties - the first conical section has a larger cone angle for secure connection, while the second conical section has a smaller cone angle for facilitated disconnection. This local differentiation of geometric quality allows simultaneous achievement of connection security and easy disconnection.
2Ease of manufacture
If a soft, flexible material is used for the socket, then ease of manufacture is improved and manufacturing tolerance compensation is enabled, but connection firmness may be reduced
Solution Approach 1:
The patent changes the geometric parameters of the recess by introducing two conical sections with different cone angles. This parameter modification allows the soft material to be compressed asymmetrically during insertion, providing both easy manufacture/tolerance compensation and firm connection, as the material deformation adapts to the dual-cone geometry.
3Stability of the object's composition
If the connecting pin lies flat over its entire axial length, then connection stability is improved, but friction increases making insertion and extraction difficult
Solution Approach 1:
The connecting pin is segmented into different axial sections with different functional characteristics. The conical sections provide stability through flat contact, while the cylindrical section reduces friction by not lying flat. This segmentation resolves the contradiction between stability and friction reduction.
Solution Approach 2:
Different axial regions of the connecting pin have different contact properties - conical sections are designed to lie flat for stability, while the cylindrical section is designed not to lie flat for reduced friction. This local differentiation of contact quality achieves both stability and low friction.
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 solution provides a structurally simple, easy-to-manufacture socket with a secure and firm connection that adapts to manufacturing tolerances, reducing the risk of material damage during disconnection and ensuring precise guidance and stability.
Implementation Method 1
The conical, spaced sections in the socket are connected to one another via a cylindrical section, which ensures that the shank of the connecting pin does not lie flat over its entire axial length to reduce friction, but only with its conical sections on the inner wall of the socket
Implementation Method 2
The connecting section is designed as a slit-shaped or slit-like recess and ensures sufficient flexibility of the piece sleeve in the radial direction, it reduces the rigidity of the socket and allows a radial expansion of the socket within certain limits when the plug shafts of the connecting pin are inserted
Data Source
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AI summary
The invention relates to a receiver for a plug-in connection for fixing tooth crown and jaw segments based on a model, comprising two plug recesses for accommodating two parallel plug shafts of a connector pin. A web runs between the plug recesses in the receiver in which a slot connecting the two plug recesses is arranged.