Front Sheet Fixing Structure Thermal Expansion Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing front sheet fixing structures for display devices and control panels are prone to wrinkling or deformation due to thermal expansion differences between the housing and the front sheet, especially in larger-screen displays, and the solutions that use a metal frame with a resin bezel are complex and costly, while covering the entire operation surface results in a flat design lacking three-dimensional distinction.
Innovation Solution
A front sheet fixing structure that attaches a front sheet to the inner bottom surface of a housing using a front metal plate with a thermal expansion coefficient matching the sheet, featuring a plate-like mounting portion and oblong slots, and a fixing metal plate with an L-shaped cross-section to absorb dimensional differences, preventing deformation while maintaining a three-dimensional appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the front sheet is affixed directly to the molded housing, then the structure is simple and low cost, but the front sheet becomes wrinkled or deformed due to thermal expansion differences
Solution Approach 1:
A metal frame is introduced as an intermediary component between the molded housing and the front sheet. The metal frame has a thermal expansion coefficient that matches that of the front sheet, serving as a mediator that prevents thermal expansion mismatch deformation while maintaining structural support.
Solution Approach 2:
The solution employs a composite structure combining metal frame and resin bezel materials. The metal frame provides thermal expansion compatibility with the front sheet, while the resin bezel integrates with the molded housing, creating a multi-material assembly that resolves the thermal expansion contradiction.
2Manufacturing precision
If a metal frame is integrally molded with a resin bezel to prevent front sheet deformation, then front sheet flatness is maintained, but production processes become more complicated and costly
Solution Approach 1:
The structure is segmented into separate components: a metal frame and a resin bezel. These components are manufactured independently and then assembled together, allowing each part to be optimized separately and simplifying production compared to integral molding while maintaining the functional benefits of the combined structure.
3Reliability
If the entire operation surface is covered by the front sheet, then protection is maximized, but the design becomes flat and lacks three-dimensional distinction
Solution Approach 1:
The front surface is segmented into two distinct zones: a front sheet covering area for protection (display and control areas) and a resin bezel covering area for three-dimensional design. This segmentation allows the protected areas to be separated from the decorative three-dimensional areas, achieving both protection and aesthetic goals simultaneously.
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
Prevents deformation of the front sheet due to temperature changes while allowing a three-dimensional design, using conventional manufacturing methods and reducing complexity and cost compared to integrated metal and resin solutions.
Implementation Method 1
having a thermal expansion coefficient substantially equal to that of the front sheet
Implementation Method 2
The mounting surface of the mounting portion is affixed to a reverse surface of the housing with an adhesive or a double-sided tape
Implementation Method 3
a gap for absorbing a dimensional difference between the second part and the vertical surface of the front metal plate is formed
Data Source
AI summary
In a front sheet fixing structure configured to attach a front sheet to a housing having an opening for a display device or control panel, the front sheet is attached to an inner bottom surface of the housing so as to close the opening of the housing by means of a front metal plate having an opening corresponding to the opening of the housing and having a thermal expansion coefficient substantially equal to that of the front sheet.