TV Wall-Mount Fastening Structure to Limit Screw Protrusion
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Solution Overview
Problem
Conventional television attachment fixtures face challenges such as material and technical difficulties in forming deep-drawn cavities, leading to increased defects and costs, and risk of electrical malfunctions due to misapplication of machine screws, which can protrude and contact internal components.
Innovation Solution
A connecting structure featuring a fastening member with a threaded hole and a cap to prevent screws from protruding, formed by folding a sheet metal member, which includes a receiving part and bent parts to securely attach a wall-mount fixture to a display device, reducing assembly complexity and preventing screw misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deep-drawn cavity is used to form the threaded hole in the attachment fixture, then the screw can be securely retained, but material and technical difficulties increase leading to more defects and higher costs
Solution Approach 1:
The attachment fixture is divided into two separate components: a base member with a through-hole and a separate cap member with a threaded hole. This segmentation eliminates the need for complex deep-drawn cavity formation while maintaining secure screw retention. The cap member can be简单地 formed with external threads that engage with the through-hole in the base member.
Solution Approach 2:
The cap member is designed to fit over and engage with the base member, creating a nested structure. The cap member's external threads engage with the internal through-hole of the base member, forming a secure connection without requiring complex deep-drawn cavity formation in a single piece.
2Strength
If a machine screw is used to fix the wall-mount fixture, then the attachment is secure, but the screw may protrude and contact internal components causing electrical malfunctions
Solution Approach 1:
The cap member is pre-formed with a threaded hole that has a controlled depth, preventing the screw from protruding beyond a safe length before the attachment is even assembled. This preliminary preparation of the threaded hole depth eliminates the risk of screw protrusion contacting internal components.
Solution Approach 2:
The cap member acts as an intermediary between the machine screw and the wall-mount fixture. It provides a controlled threaded engagement that limits screw protrusion, while also providing an interface for attaching the wall-mount fixture, thus protecting internal components from direct contact with the screw.
3Ease of manufacture
If a simple through-hole is used instead of a deep-drawn cavity, then manufacturing is easier and costs are reduced, but the screw may not be securely retained
Solution Approach 1:
The fastening function is segmented between the base member's through-hole and the cap member's threaded hole. The through-hole provides easy manufacturing and alignment, while the separate cap member with its threaded hole provides secure screw retention through external threading that engages with the through-hole.
Solution Approach 2:
The cap member serves as an intermediary that transforms the simple through-hole into a secure fastening structure. By fitting the cap member with external threads over the through-hole, the simple through-hole gains the screw retention capability of a threaded hole while maintaining manufacturing simplicity.
4Adaptability or versatility
If multiple separate components are used for the attachment fixture, then design flexibility increases, but assembly complexity increases
Solution Approach 1:
The base member and cap member are designed to assemble through a simple interference fit where the cap member's external threads engage with the base member's through-hole. This merging of two simple components creates a functional equivalent to a complex deep-drawn cavity structure without increasing assembly complexity.
Data Source
AI summary
A connecting structure for attaching a wall-mount fixture to an external portion of a display device includes a fastening member. The fastening member is integrally formed as a one-piece, unitary member. The fastening member includes a receiving part, and first and second bent parts that extend from the receiving part, the first bent part having a first end plate with a threaded hole, the second bent part having a second end plate with a screw insertion hole, the first and second end plates overlapping with respect to each other and facing with the receiving part. The receiving part is configured and arranged to receive a distal end of a screw that extends through the insertion hole of the second end plate and is screwed into the threaded hole of the first end plate such that the screw is prevented from being screwed beyond the receiving part.