Antenna Bobbin Inclined Surfaces to Protect the Core From Impact
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Solution Overview
Problem
Existing antenna devices are prone to core breakage due to impact transmission from the case to the bobbin and subsequently to the core.
Innovation Solution
The antenna device incorporates a bobbin with inclined surfaces that overlap the core, dispersing impact in the second and third directions, thereby reducing the force transmitted to the core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the case receives an impact, then the impact is transmitted from the case to the bobbin and from the bobbin to the core, but this may result in breakage of the core
Solution Approach 1:
The patent introduces an intermediary structure (the inclined surface on the bobbin) between the impact source and the core. This inclined surface acts as a mediator that transforms the direct impact force into a dispersed force pattern, preventing the core from receiving the full brunt of the impact while maintaining the structural integrity of the antenna device.
Solution Approach 2:
The patent converts the harmful impact force into a beneficial dispersal mechanism. By designing the bobbin with an inclined surface, the impact energy that would normally be transmitted directly to the core is instead transformed into a force that pushes the core along the inclined surface, dispersing the energy and preventing breakage.
2Object-affected harmful factors
If the inclined surface is positioned closer to the core than the winding, then the impact is dispersed in multiple directions, but the inclined surface must be precisely positioned to avoid contact with the core during normal operation
Solution Approach 1:
The patent employs parameter changes by carefully controlling the inclination angle and position of the inclined surface. By optimizing these geometric parameters, the design achieves a balance where the inclined surface is close enough to effectively disperse impact forces but positioned and angled such that it does not contact the core during normal antenna operation.
Solution Approach 2:
The patent applies local quality by creating a specific geometric feature (the inclined surface) with unique properties at a specific location on the bobbin. This localized structural modification provides impact dispersion functionality only where needed, without affecting the overall structure or requiring high precision throughout the entire component.
Data Source
AI summary
An antenna device includes an antenna body and a case that accommodates the antenna body. The antenna body includes a bobbin including a pair of side walls that extend in a first direction with inner surfaces that face each other in a second direction crossing the first direction. A winding is wound around the bobbin to surround the side walls while the axial direction is parallel to the first direction. A core is held by the side walls between the inner surfaces of the pair of side walls in an inner space defined by the winding. At least one of the inner surfaces includes inclined surfaces that overlaps the core in a third direction crossing both the first and second directions so as to be positioned closer to the core.