Projection Device Case Structure With Elastic Buckling
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Solution Overview
Problem
In the design of case structures for projection devices, there is a challenge in achieving both high appearance quality and engaging force while maintaining assembly simplicity and cost-effectiveness, particularly in limited spaces where complex designs increase assembly steps and tolerance precision matching difficulties.
Innovation Solution
A case structure design featuring a cover plate and base with elastic members, slide groove structures, and inclined pillars that engage and buckle to provide a strong connection, allowing for smooth sliding and secure closure, thus achieving good engaging force and maintaining appearance quality without complex assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a complex design is used to improve engaging force and appearance quality, then the engaging force and appearance quality requirements can be met, but the assembly steps increase and the cost of parts increases
Solution Approach 1:
The patent combines multiple functions into integrated structures: the engaging portions and positioning portions are merged into the cover plate and base itself rather than being separate components; the elastic members are integrated within the base structure; the slide groove structures are formed directly on the cover plate. This merging reduces the number of separate parts and assembly steps while maintaining the required engaging force and positioning accuracy.
Solution Approach 2:
The cover plate and base are designed with multi-functional features: the engaging portions provide both connection and positioning functions; the positioning portions serve both alignment and location functions; the elastic members provide both engagement force and shock absorption; the slide groove structures provide both guidance and movement functions. This multi-functionality reduces the need for additional specialized components, simplifying the overall assembly.
2Manufacturing precision
If a complex design is used to improve engaging force and appearance quality, then the engaging force and appearance quality requirements can be met, but the cost of parts increases
Solution Approach 1:
The patent combines multiple functions into integrated structures: the engaging portions and positioning portions are merged into the cover plate and base itself rather than being separate components; the elastic members are integrated within the base structure; the slide groove structures are formed directly on the cover plate. This merging reduces the number of separate parts and assembly steps while maintaining the required engaging force and positioning accuracy.
Solution Approach 2:
The elastic members are designed to automatically engage and disengage the cover plate from the base without requiring additional tools or complex mechanisms. The slide groove structures provide self-guidance during assembly, ensuring proper alignment and positioning automatically. This self-service capability simplifies the manufacturing process and reduces the need for precision tooling and specialized assembly equipment.
3Strength
If a complex design is used to improve engaging force and appearance quality, then the engaging force and appearance quality requirements can be met, but the difficulty of tolerance precision matching increases
Solution Approach 1:
The elastic members act as intermediaries that accommodate tolerance variations between the cover plate and base. By providing elastic compliance, they absorb dimensional variations and misalignments that would otherwise require tight tolerance control. The slide groove structures serve as intermediaries that guide the cover plate into proper alignment during assembly, reducing the impact of tolerance accumulation.
Solution Approach 2:
The patent utilizes the elastic properties of the elastic members to change the mechanical parameters of the connection system. The elastic members can deform within their elastic limit to accommodate tolerance variations, effectively transforming rigid dimensional requirements into flexible force-based engagement. This parameter change allows for broader tolerance ranges while maintaining adequate engaging force.
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
The design ensures a strong and secure connection between the cover plate and base with optimized appearance quality and simplified assembly, reducing assembly complexity and costs while maintaining performance under tests like drop and vibration tests.
Implementation Method 1
multiple elastic members and multiple slide groove structures located on the third cover plate side and the fourth cover plate side... each of the elastic members has a first end connected to the cover plate and a second end extending toward the first cover plate side... each of the pillars has an inclined surface, and when the cover plate moves to the closed position, each of the hooks slides from one side of each of the pillars to another side of each of the pillars along each of the inclined surfaces and is buckled with each of the pillars
Data Source
AI summary
A case structure, adapted for a projection device, includes an enclosure, a base and a cover plate. The enclosure has an opening. The base is located at the opening and has a receiving groove. The cover plate slides relative to the base to move to a closed position. The cover plate includes a first engaging portion on a first cover plate side, a first positioning portion on a second cover plate side, multiple elastic members and multiple slide groove structures on a third cover plate side and a fourth cover plate side. The slide groove structures are located between the elastic members and the first positioning portion in the first direction. The base includes a second engaging portion on a first base side, a second positioning portion on a second base side, multiple pillars and multiple sliders on a third base side and a fourth base side.