Positioning Tabs Align Display in Cosmetic Mirror
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Solution Overview
Problem
The existing cosmetic mirrors with digital display screens face inefficiencies in mounting due to potential deviations in positioning the display screen, requiring multiple adjustments to align characters with the window, making the process time-consuming.
Innovation Solution
The cosmetic mirror design incorporates a bottom shell with multiple positioning tabs that accurately position the PCBA board, ensuring the display apparatus is correctly aligned with the character displaying windows on the mirror body, thereby simplifying the mounting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the digital display screen is positioned and fixed only by a screw, then the mounting process is simple, but the positioning accuracy deteriorates and multiple adjustments are needed
Solution Approach 1:
Positioning tabs are pre-formed on the PCBA board before assembly. These tabs are designed to fit into corresponding cavities in the bottom shell, establishing accurate positioning relationships in advance. This preliminary positioning structure eliminates the need for complex adjustment processes during assembly while maintaining simplicity.
Solution Approach 2:
The positioning tabs act as intermediary elements between the PCBA board and the bottom shell. These tabs transmit and ensure accurate positioning information, allowing the display screen to be correctly aligned with the character displaying windows without requiring multiple adjustment operations.
2Manufacturing precision
If multiple adjustments are made to align characters with the window, then the positioning accuracy is improved, but the mounting time increases
Solution Approach 1:
The positioning tabs are designed and formed in advance on the PCBA board, creating a pre-established positioning system. This preliminary structure ensures that when the board is assembled into the bottom shell, the characters automatically align with the character displaying windows, eliminating the need for time-consuming adjustments during assembly.
Solution Approach 2:
The positioning tabs enable the PCBA board to self-position correctly within the bottom shell through the fit between the tabs and their corresponding cavities. This self-positioning mechanism automatically achieves accurate alignment without requiring external adjustment operations, thereby reducing mounting time while maintaining precision.
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 design enhances the positioning accuracy of the display apparatus, reducing the need for repeated adjustments and streamlining the mounting process, making it more efficient and user-friendly.
Implementation Method 1
Light reflection of a mirror body mainly is achieved based on a metal layer (a light reflection layer) plated thereon
Data Source
AI summary
A cosmetic mirror includes: a bottom shell, a mirror body, a PCBA board, and a display apparatus. The bottom shell defines a mounting cavity having an opening. A plurality of first positioning tabs are arranged in the mounting cavity. The mirror body is mounted at the opening and covers the opening. The mirror body includes a transparent layer and a light reflective layer. A character displaying window is arranged on the light reflective layer. The PCBA board is fixedly mounted in the mounting cavity. Each side of the PCBA board abuts against at least one first positioning tab. The display apparatus is welded to mounted on the PCBA board and electrically connected to the PCBA board. A character lamp is arranged on the display apparatus and is selectively illuminated to display a number or a symbol. The character lamp is disposed corresponding to the character displaying window.