Side Grounded Structure for Mobile Battery Lid
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Solution Overview
Problem
Existing side grounding structures for stainless steel battery lids in mobile communications terminals face challenges such as small grounding area, poor contact quality, high product defect rates, and costly production processes, which affect antenna performance and stability.
Innovation Solution
A side grounded structure combining a stainless steel battery lid with a plastic layer and an elastic contact sheet, eliminating the need for a 90-degree curve, facilitating easier assembly and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a 90 degree curve grounding part is used on the edge of the stainless steel battery lid, then the grounding area is increased, but the grounding contact is poor and grounding requirements are hardly met
Solution Approach 1:
The grounding structure is segmented into multiple components: the stainless steel battery lid, a separate plastic layer, and an elastic contact sheet. This segmentation allows each component to perform its specific function optimally, with the elastic contact sheet providing reliable grounding contact while the plastic layer ensures smooth side appearance, resolving the contradiction between grounding area and grounding contact quality.
Solution Approach 2:
The invention uses a composite structure combining stainless steel, plastic, and elastic materials. The plastic layer provides a smooth surface for appearance requirements, while the elastic contact sheet with conductive material ensures reliable grounding contact. This composite approach allows both the smooth side appearance and reliable grounding contact to be achieved simultaneously.
2Shape
If a 90 degree curve grounding part is used to ensure smooth side appearance, then the electric requirements of grounding contact are met, but the product defect rate is quite high
Solution Approach 1:
By separating the smooth side appearance function (plastic layer) from the grounding function (elastic contact sheet), the invention eliminates the need for complex 90 degree curve molding that causes high defect rates. Each component can be manufactured independently with standard processes, significantly improving product yield while maintaining both appearance and grounding performance.
Solution Approach 2:
The plastic layer acts as an intermediary between the stainless steel battery lid and the elastic contact sheet, providing a smooth surface for appearance requirements while allowing the elastic contact sheet to make reliable grounding contact with the lid edge, thus achieving both smooth appearance and high product yield.
3Area of stationary object
If a 90 degree curve is used for side grounding, then the grounding area is increased, but the cost of the mold is rather high and the production process is complex
Solution Approach 1:
The grounding structure is divided into separate components that can be manufactured using standard molding processes without requiring expensive 90 degree curve molds. The elastic contact sheet with conductive material can be produced through conventional methods, and the plastic layer can be molded separately, greatly simplifying the production process and reducing mold costs while maintaining adequate grounding area.
Solution Approach 2:
The invention merges the grounding function with the side structure by using the side structure itself as the grounding contact surface. The elastic contact sheet makes contact with the edge of the stainless steel battery lid, utilizing the existing structure for grounding purposes and eliminating the need for separate complex curve grounding components, thus reducing manufacturing complexity and cost.
4Ease of manufacture
If no side grounding is done, then the production process is simplified, but the antenna performance is unstable with poor speech quality
Solution Approach 1:
The side structure itself serves as the grounding contact surface, utilizing the existing stainless steel battery lid edge for grounding purposes. This self-service approach provides reliable grounding for antenna performance stability without requiring additional complex grounding components or processes, thus maintaining production simplicity while ensuring reliable antenna performance.
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
The solution achieves stable and high-quality RF performance, reduces product defects, and simplifies the production process, thereby improving yield and lowering costs.
Implementation Method 1
Between the aforementioned stainless steel battery lid 210 and the aforementioned plastic layer 220 an elastic contact sheet 230 is arranged
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3C
AI summary
A side grounded structure for combined battery lid of mobile communication terminal is provided, which comprises a metallic battery lid, and there is a plastic layer set in the metallic battery lid, and a spring contact slice is set between the metallic battery lid and the plastic layer, the spring contact slice is connected to the metallic battery lid and has a curve contact section used to connect the grounded down-lead of the circuit board. By adopting the combined structure of battery lid and equipping the spring contact slice in the battery lid, the side grounded structure for combined battery lid of mobile communication terminal in present invention conveniently realizes the ground contact, assures the efficiency of the contact, enables the convenient production, improves the product yield and reduces consumption and cost in manufacture.