Ventilator Cover Spring Mounting Structure to Prevent PBT Cracking
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Solution Overview
Problem
Ventilator cover made of PBT material is prone to cracks or breakage when a screw with a permeable chemical substance is directly screwed into it, leading to unstable mounting and a risk of the cover dropping from the body.
Innovation Solution
A fixing structure comprising a U-shaped protrusion with openings, a connector with cuts, and a movable part with a foot and head portion, where the connector and movable part are made of metal and connected by a screw, allowing the cover spring to be securely fitted without direct screwing into the cover, thus avoiding stress and potential damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a screw with permeable chemical substance is directly screwed into the PBT cover, then the mounting is simple and direct, but cracks or breakage occur in the cover due to residual stress and chemical penetration
Solution Approach 1:
A metal fixing component is introduced as an intermediary between the screw and the PBT cover. The screw fastens to the metal component, which in turn secures the spring to the cover through mechanical engagement (U-shaped protrusion with leg walls). This mediator prevents direct chemical interaction and stress concentration on the PBT material, eliminating cracks and breakage while maintaining secure mounting.
2Device complexity
If a screw is directly mounted on the fixing component, then the connection is direct and simple, but stress is generated on the fixing component causing the cover to potentially drop
Solution Approach 1:
The fixing system is segmented into distinct functional components: a connector (receiving the screw), a metal fixing component (with U-shaped protrusion and leg walls), and a spring mounting structure. This segmentation distributes stress across multiple components rather than concentrating it on the fixing component alone, enhancing durability while maintaining structural simplicity.
3Device complexity
If the cover spring is directly secured to the cover, then the mounting structure is simple, but the cover may not be stably mounted and may drop from the body
Solution Approach 1:
The fixing component features a U-shaped protrusion with two leg walls extending in opposite directions, creating a multi-dimensional engagement structure. The spring is secured between these leg walls, providing stability in multiple directions rather than a single-point attachment. This dimensional expansion ensures the cover remains stably mounted and prevents dropping.
Data Source
AI summary
Disclosed is a fixing structure for ventilator cover spring, comprising a fixing component, a connector, a movable part, and a cover spring. The fixing component is a U-shaped protrusion formed on a cover and has a top wall and two leg walls, a first opening and a second opening are respectively formed in the two leg walls. Two cuts are formed at two ends of the connector, wherein each cut is provided with a tongue, the connector being inserted through and fixed in the first opening and the second opening. The movable part has a head portion and a foot portion, wherein the head portion is fixed on the connector, and the foot portion extends toward the top wall. The cover spring is fitted over the foot portion and is confined on the foot portion.