Elastic Body Identification Marks for Keypad Mold Repair
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Solution Overview
Problem
The existing elastic bodies for keyswitch assemblies face difficulties in adhering to thin film circuit boards due to uneven surfaces caused by marking parts on the upper surface, which complicates the repair of poorly designed or damaged molds.
Innovation Solution
The elastic body features identification marks on the side of its annular base, allowing for quick positioning and repair of poor-quality cavities without affecting adhesion to the circuit board, using a combination of ribs and air vents with distinct markings and characters to identify mold positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If identification marks are placed on the upper surface of the elastic body base, then mold cavity identification is enabled, but the surface becomes uneven and adhesion to the circuit board deteriorates
Solution Approach 1:
The identification marks are relocated from the upper surface (horizontal plane) to the side surface (vertical plane) of the elastic body base. This dimensional transition allows the marks to be positioned on the lateral face of the base, separating the identification function from the adhesion surface. The side surface marking enables mold cavity identification while preserving the smoothness and adhesion quality of the upper surface that contacts the circuit board.
2Productivity
If multiple molds are used for injection molding, then production efficiency is improved, but quality control and defect identification become more difficult
Solution Approach 1:
Different identification marks are assigned to different mold cavities and molds, creating unique local identifiers for each production source. This allows quality issues to be traced back to specific molds or cavities by examining the identification marks on defective elastic bodies, enabling targeted quality control measures without reducing production efficiency from using multiple molds simultaneously.
Data Source
AI summary
The present invention disclosed an elastic body for keyswitch assembly, comprising a body and identification marks. The body has an annular base and an elastic pressing part, and the elastic pressing part is disposed on the annular base. The identification marks are disposed on the side of the annular base. Therefore, the mold producing poor elastic body and cavities on it can be identified by the identification marks on the elastic body, so damaged cavities can be repaired quickly and effectively then. The location and means of marking of the identification marks does not affect the adhesion of the elastic body to the prefabricated thin film circuit board. The present invention further provides a keyswitch assembly comprising the elastic body of the present invention.