Communication Device Outer Cover with Integrated Antenna
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Solution Overview
Problem
The manufacturing of internal antennas in mobile communication devices is time-consuming and prone to human error, and the increasing trend towards lighter devices limits the distance between the antenna and the circuit board, affecting antenna efficacy.
Innovation Solution
The integration of an antenna into the outer cover of a communication device using an insert molding process, where the antenna is fixed at a predetermined position on the cover body's bottom surface, allowing for improved positioning and increased distance from the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal antenna is fixed to the main framework using heating fusing or sticking mode, then the antenna can be securely attached, but the manufacturing time increases and human error is introduced
Solution Approach 1:
The patent merges the antenna fixation process with the outer cover molding process into a single insert molding operation. The antenna is placed in the mold cavity before injection, allowing the outer cover to be molded directly onto the antenna in one step, eliminating separate fixation operations and reducing manufacturing time while maintaining reliability
Solution Approach 2:
The antenna is pre-positioned in the mold cavity before the outer cover material is injected. This preliminary positioning ensures accurate placement and secure attachment during the molding process itself, eliminating the need for subsequent fixation steps and reducing human error
2Weight of moving object
If the device is designed to be lighter and slimmer, then the device weight and thickness are reduced, but the distance between the internal antenna and circuit board is limited, affecting antenna efficacy
Solution Approach 1:
The patent utilizes the vertical dimension (thickness direction) more effectively by integrating the antenna into the outer cover structure. This allows the antenna to be positioned at an optimal distance from the circuit board within the limited thickness, maximizing antenna efficacy without increasing overall device weight or volume
3Strength
If multiple heat fusion pillars are formed at the back of the main framework, then the antenna is securely fixed, but the manufacturing complexity and time consumption increase
Solution Approach 1:
The patent combines the antenna fixation function with the outer cover structural function. The outer cover itself serves as the fixation structure through the insert molding process, eliminating the need for separate heat fusion pillars and reducing manufacturing process complexity while maintaining fixation strength
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
This method reduces manufacturing costs and time, enhances antenna efficacy by increasing the distance between the antenna and the circuit board, and improves the strength of the outer cover while maintaining device thickness.
Implementation Method 1
the antenna is fixed at a predetermined position on the bottom surface by an insert molding process
Data Source
AI summary
The invention provides an outer cover adapted to a communication device, a communication device including the same and a method for manufacturing the same. The outer cover according to the invention includes a cover body and an antenna. The cover body has a bottom surface. Particularly, the antenna is fixed at a predetermined position on the bottom surface by an insert molding process.