Helical Spacer Tolerance Compensation Display Assembly
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Solution Overview
Problem
Existing display units face challenges in preventing distortions due to high demands for parallelism between screw domes and support domes, leading to complex and expensive production processes.
Innovation Solution
Incorporating spacer pieces between screw domes and support domes with helically constructed faces that engage with securing screws, allowing for tolerance compensation and adjustment, eliminating the need for precise tolerances and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high precision tolerances are maintained between screw domes and support domes to prevent display distortions, then display quality is improved, but production complexity and cost increase
Solution Approach 1:
The patent introduces spacer pieces as intermediary elements between the screw domes and support domes. These spacer pieces have helical abutting surfaces that engage with corresponding helical surfaces on the support domes, allowing the spacer pieces to be rotated into position during assembly. This intermediary mechanism transforms the assembly process from requiring precise pre-aligned parallel surfaces to allowing insertion followed by rotational engagement, significantly reducing manufacturing precision requirements while maintaining display quality.
2Manufacturing precision
If high precision tolerances are maintained between screw domes and support domes to prevent display distortions, then display quality is improved, but production cost increases
Solution Approach 1:
The spacer pieces serve as cost-effective intermediary components that eliminate the need for expensive precision machining of parallel support faces. By using simple cylindrical spacer pieces with helical engagement surfaces that can be easily manufactured and assembled through rotation, the patent significantly reduces production costs while effectively preventing display distortions.
3Manufacturing precision
If narrow tolerances are complied with for abutting components to prevent display distortions, then display quality is improved, but assembly complexity increases
Solution Approach 1:
The spacer pieces with helical abutting surfaces act as intermediaries that simplify assembly. The helical geometry allows the spacer pieces to be inserted into the housing and then rotated along the helical paths of the support domes, automatically achieving proper positioning and engagement. This rotational assembly method is much simpler than attempting to align and bolt components with precisely machined parallel surfaces, significantly improving ease of operation.
4Manufacturing precision
If precise parallelism is maintained between support faces to prevent display distortions, then display quality is improved, but device simplicity decreases
Solution Approach 1:
The patent replaces the complex requirement for precisely machined parallel support faces with simple cylindrical spacer pieces that have helical engagement surfaces. The spacer pieces act as intermediaries that absorb positioning tolerances and allow for simpler, less precise manufacturing of the housing and display module mounting surfaces, thereby reducing overall device complexity while maintaining display quality.
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 effectively prevents display distortions while reducing production complexity and costs, ensuring a distortion-free display without requiring narrow tolerances or complex processing, particularly effective for liquid crystal displays.
Implementation Method 1
the threaded shaft of which is frictionally engaged up to a specific torque with the inner wall of the spacer piece opening
Data Source
AI summary
A display unit having a display module, which has a display having a rear display wall with bosses having support surfaces. A housing covers the of the display has support bosses through which fastening screws are guided and can be screwed into holes of the screw bosses to brace the display module against the housing. A spacer is arranged between each screw and support. The surface of the spacer extends parallel to the rear display wall. The spacer is supported on the support boss. The spacer surface and the supporting surface of the support boss rise helically in opposite directions and are concentric to a through-hole. The threaded shaft of the fastening screw protrudes through a spacer through-opening and is frictionally locked to the inner wall of the spacer through-opening to a certain torque.