Electronic Cover Latching Structure for Blind Assembly and Quiet Fit
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Solution Overview
Problem
Existing electronic device housings face challenges in attaching covers without direct visual alignment, leading to difficult positioning and potential noise due to wobbling under external vibrations.
Innovation Solution
A cover-equipped electronic device design featuring a projecting latch and a receiving hole or recess, with a restraining guide that allows easy attachment and minimizes noise by reducing points of contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple engagement points (fitting protrusions and holes, catches and slide grooves) are used to attach the cover to the case, then the attachment reliability is improved, but noise is generated due to wobbling at the engagement points under external vibrations
Solution Approach 1:
The patent extracts and removes the restraining guide (including restraining ribs and restraining grooves) from the structure after the cover is attached to the case. This removal eliminates the engagement points that cause wobbling and noise under external vibrations, while the attachment reliability is maintained by the permanent engagement of fitting protrusions with holes and catches with slide grooves.
2Ease of operation
If the cover is attached to the back face of the case without direct visual alignment, then the ease of operation is improved, but the positioning process becomes difficult
Solution Approach 1:
The patent incorporates a positioning guide that protrudes from the case and fits into a corresponding groove on the cover before the actual attachment. This preliminary positioning action guides the cover into the correct position relative to the case, making the attachment process easier even when working from the back face without direct visual alignment of all engagement points.
Data Source
AI summary
A press-contact guide, a restraining guide, and a latching mechanism are provided between a housing of a device body and a cover. A restraining projection provided on the cover is inserted into an introduction opening to cause a press-contact projection to be pressed into contact with a press-contact slide part. In this state, the cover is slid in a latching-force-acting direction. Then, the cover moves with a restraining projection being restrained by the restraining guide and cause a projecting latch to latch into a receiving hole. When such a latched state is established, the cover and the housing go out of contact with each other at the press-contact guide and the restraining guide.