Side Key Connection Device for Mobile Terminals
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Solution Overview
Problem
Existing side key connection structures in mobile terminals are costly, complex in assembly, and increase the thickness of the device due to the use of dome switches or tact switches, which are expensive and require extensive manufacturing processes.
Innovation Solution
A side key connection device that eliminates the need for dome or tact switches by using a conductive connection member and elastic members to electrically connect a side key directly to extended row and column terminal pads on the main circuit board, reducing assembly complexity and cost while allowing for thinner designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If dome switch or tact switch is used for side key connection, then electrical connection between side key and main circuit board is achieved, but device thickness increases and assembly complexity increases
Solution Approach 1:
The patent extracts and eliminates the dome switch or tact switch from the side key connection structure. Instead of using these separate switching components, the invention directly connects the side key to the main circuit board through a simplified connection structure that integrates the connection function into the housing and circuit board assembly, thereby reducing device thickness.
Solution Approach 2:
The patent merges the side key connection function with the housing and circuit board structure. The side key is directly mounted to the main circuit board or housing without requiring separate dome switches or tact switches, combining multiple functions into a unified structure that reduces overall complexity and thickness.
2Reliability
If dome switch or tact switch is used for side key connection, then electrical connection is established, but manufacturing cost increases and assembly process becomes complex
Solution Approach 1:
The patent removes the dome switch or tact switch components from the assembly, eliminating the complex manufacturing and assembly processes associated with these components. The side key is directly connected to the main circuit board through a simplified structure that maintains electrical connection reliability without requiring separate switching elements.
Solution Approach 2:
The invention merges the side key mounting and electrical connection functions into a single integrated structure. The side key is directly attached to the main circuit board or housing with built-in electrical contacts, eliminating the need for separate dome switches or tact switches and their associated complex assembly processes.
3Ease of operation
If FPCB is used for dome switch attachment, then side key function is achieved, but manufacturing cost increases and mounting space increases
Solution Approach 1:
The patent extracts and eliminates the FPCB (flexible printed circuit board) from the side key assembly. Instead of attaching dome switches to an FPCB and then connecting the FPCB to the main circuit board, the invention directly mounts the side key to the main circuit board or housing, removing the intermediate FPCB layer and reducing mounting space requirements.
Solution Approach 2:
The invention merges the side key mounting function directly onto the main circuit board or housing structure, eliminating the need for a separate FPCB. This integration reduces the mounting space required on the main circuit board while maintaining the side key functionality.
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 solution simplifies the side key structure, reduces costs, and decreases the overall thickness of the mobile terminal by eliminating the need for expensive FPCBs and tact switches, thereby enhancing manufacturing efficiency and design flexibility.
Implementation Method 1
a pair of elastic members, each having one end coupled to an end of a side surface of the side key opposite to the side surface of the main circuit board and having the other end coupled to the side surface of the main circuit board in order to elastically move the side key
Implementation Method 2
a conductive connection member housed in a housing groove formed in the side key in order to electrically connect the side row and column terminal pad
Data Source
AI summary
A side key connection device of a mobile terminal simplifies a connection structure between a side key and a main circuit board. The mobile terminal includes a side key and a row and column terminal pad. The mobile terminal also includes a side key connection device installed between the side key and the row and column terminal pad. The side key connection device is electrically connected to the side key and the row and column terminal pad. Thereby, by simplifying a connection structure of a side key, a key cost, an assembly process, and a surface mounting cost can be reduced.