Display Device Rear-Chassis Stud Retention During Equipment Replacement
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Solution Overview
Problem
Existing display devices face challenges in preventing studs from separating from the rear chassis when coupling members are detached, leading to potential misalignment and vibration issues.
Innovation Solution
The display device incorporates a stud with a chassis coupling portion and a coupling member with specific thread configurations and contact areas to maintain frictional engagement, along with vibration-reducing elements and a resin layer to stabilize the electronic equipment on the rear chassis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the coupling member is separated from the stud to replace electronic equipment, then the electronic equipment can be replaced, but the stud may be separated from the rear chassis causing misalignment
Solution Approach 1:
The coupling system is divided into three distinct components: the stud (fixed to rear chassis), the coupling member (detachable), and the electronic equipment. This segmentation allows the coupling member to be removed for equipment replacement while the stud remains permanently secured to the rear chassis through friction engagement, preventing misalignment.
Solution Approach 2:
The stud is pre-installed and friction-coupled to the rear chassis before the coupling member is attached. This preliminary securing action ensures that when the coupling member is later removed for equipment replacement, the stud remains firmly in position and does not separate from the rear chassis.
2Strength
If the coupling member is tightly coupled to the stud to prevent separation, then the coupling strength is increased, but the friction force between stud and rear chassis may be insufficient
Solution Approach 1:
Different regions of the stud have different functional qualities: the first region (engagement portion) is designed for strong thread engagement with the coupling member, while the second region (friction portion) is designed with specific surface characteristics to maximize friction force with the rear chassis. This local differentiation allows both strong coupling and sufficient friction retention.
Solution Approach 2:
The stud's geometric parameters are optimized: the friction portion has a larger diameter than the engagement portion, creating a shoulder that increases contact area and friction force with the rear chassis. The thread pitch and engagement depth are also specifically designed to provide sufficient coupling strength while maintaining friction engagement.
3Stability of the object's composition
If the stud is firmly fixed to the rear chassis to prevent misalignment, then the structural integrity is maintained, but the coupling member cannot be easily separated for maintenance
Solution Approach 1:
The system segments the permanent connection (stud to rear chassis via friction) from the detachable connection (coupling member to stud via threads). This allows the stud to remain firmly fixed for stability while the coupling member can be easily detached for maintenance by unscrewing threads.
Solution Approach 2:
The coupling system transitions from a static tight connection to a dynamic system where the coupling member can be rotated and detached from the stud, while the stud itself remains statically fixed to the rear chassis through friction engagement.
4Reliability
If the coupling member has a large head to prevent decoupling, then the retention is improved, but the insertion through the electronic equipment hole becomes difficult
Solution Approach 1:
The coupling member is segmented into a large-diameter head (for retention) and a smaller-diameter shank (for insertion). The head portion provides the necessary retention force to prevent decoupling, while the smaller shank easily passes through the electronic equipment's insertion hole during assembly.
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 ensures the stud remains coupled to the rear chassis during decoupling of the coupling member, reducing vibration transfer and maintaining structural integrity, thereby preventing misalignment and enhancing operational stability.
Implementation Method 1
a friction force between a stud and a rear chassis is greater than a friction force between the stud and a coupling member
Implementation Method 2
the coupling member may include a stud coupling portion including a coupling member thread configured to be inserted into the stud, and wherein the coupling member thread has a greater pitch than the stud thread
Implementation Method 3
the stud may include a stud supporting portion provided between the electronic equipment and the rear chassis for spacing the electronic equipment from the rear chassis to prevent vibration generated in the electronic equipment from being transferred to the display panel
Data Source
AI summary
A display device includes a display panel, a rear chassis supporting the display panel, electronic equipment adjacent to the rear chassis and comprising an insertion hole, a stud coupled to the rear chassis with a first coupling, and a coupling member penetrating the insertion hole of the electronic equipment and coupled to the stud with a second coupling force to install the electronic equipment on the rear chassis. The coupling member being decouplable from the stud and including a coupling member head having a greater diameter than the insertion hole. The second coupling force is weaker than the first coupling force such that, while the electronic equipment is decoupled from the rear chassis by separating the coupling member from the stud, coupling of the stud and the rear chassis is maintained.