Automobile Meter LCD Assembly Structure for Compact Fixation
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Solution Overview
Problem
Conventional LCD assembly structures for automobile meters rely on elastic locking nails that require a large assembly space due to the need for bending space for nail protrusions, leading to reduced locking strength and increased protrusion height, which compromises reliability and space efficiency.
Innovation Solution
The proposed LCD assembly structure employs corner fixing pieces, extension pieces, and elastic pressing pieces to securely fix the liquid crystal plate without the need for nail protrusions, allowing for a smaller assembly space by using a sandwiching mechanism that reduces the protrusion height and eliminates the requirement for a large bending space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic locking nails are used to prevent rising of the liquid crystal plate, then the liquid crystal plate is secured against upward movement, but the fixed-portion protruding dimension must be maintained large enough to ensure locking strength
Solution Approach 1:
The fixing structure is segmented into multiple independent elastic locking nails distributed at different positions (corners and edges) of the liquid crystal plate. Each locking nail independently provides locking force, allowing the protruding dimension to be reduced while maintaining overall locking strength through the cumulative effect of multiple segmentation points.
Solution Approach 2:
The elastic locking nails are strategically positioned at corners and edges where the liquid crystal plate is most susceptible to upward movement. This local quality approach concentrates the locking function at critical positions rather than uniformly distributing it, enabling reduced protruding dimensions while maintaining reliability at key fixation points.
2Volume of moving object
If elastic locking nails are used with reduced fixed-portion protruding dimension, then space is saved, but the locking strength declines
Solution Approach 1:
The elastic locking nails utilize elastic deformation dynamics to provide locking force. The nails are designed with specific elastic properties that allow them to deform during assembly and then maintain a constant locking force on the liquid crystal plate, ensuring sufficient locking strength even with reduced protruding dimensions.
Solution Approach 2:
The locking structure employs composite functionality by combining the elastic properties of the locking nails with the rigid support of the holder body. This composite approach allows the system to achieve high locking strength through the synergistic combination of material properties rather than relying solely on increased protruding dimension.
3Reliability
If elastic locking nails are used, then the liquid crystal plate is securely fixed, but a bending space must be provided on the back surface for nail protrusion
Solution Approach 1:
The locking nails are designed to protrude from the side walls of the holder body rather than requiring back surface bending space. This dimensional change moves the bending and deformation space from the back surface area to the side wall volume, eliminating the need for additional bending space on the liquid crystal plate assembly area.
Solution Approach 2:
The elastic locking nails are nested within recesses formed in the holder body, with only the necessary locking portions protruding. This nesting approach minimizes the space required for nail storage and bending by integrating the nail bodies into the holder structure, eliminating the need for separate bending space.
4Reliability
If elastic locking nails are used, then the liquid crystal plate is locked, but the assembly space must be larger than the outer shape of the liquid crystal plate
Solution Approach 1:
The locking nails are integrated directly into the holder body structure, merging the fixing mechanism with the housing. This consolidation eliminates the need for separate fixing components and reduces the overall assembly space by combining multiple functions (support, locking, positioning) into a single integrated holder structure.
Solution Approach 2:
The holder body serves multiple functions simultaneously: it provides structural support, contains recesses for positioning the liquid crystal plate, incorporates elastic locking nails for securing, and eliminates the need for separate bending space. This multi-functionality reduces the total assembly space by consolidating multiple components into one universal holder structure.
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 configuration enables reliable fixation of the liquid crystal plate with enhanced locking strength while minimizing the assembly space, allowing for a more compact design and easier assembly without backlash.
Implementation Method 1
a bottom-wall elastic pressing piece disposed in a protruding manner on a bottom wall of the liquid-crystal plate accommodating recess, and configured to bias a back surface of the liquid crystal plate from the bottom wall in a direction of separation
Implementation Method 2
first elastic pressing pieces disposed in between a pair of the corner fixing pieces, and configured to press and bias one edge face of the liquid crystal plate toward the extension pieces
Data Source
AI summary
An LCD assembly structure of a meter for automobile includes a liquid crystal plate; a liquid-crystal plate accommodating recess formed in a liquid crystal holder; a bottom-wall elastic pressing piece configured to bias a back surface of the liquid crystal plate from the bottom wall in a direction of separation; corner fixing pieces configured to extend outward parallel to a front surface of the liquid crystal holder at a pair of corners adjoining the liquid-crystal plate accommodating recess, and abut against a front surface of the liquid crystal plate; extension pieces configured to extend outward parallel to the holder front surface of the liquid crystal holder at a pair of corners opposite to the corner fixing pieces, and abut against the front surface of the liquid crystal plate; and first elastic pressing pieces configured to press and bias one edge face of the liquid crystal plate toward the extension pieces.