Coil Spring PCB Terminal Structure Without Solder Assembly
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Solution Overview
Problem
Existing electronic component assembly methods using soldering or conductive adhesive for connecting terminals to printed circuit boards are costly, time-consuming, and environmentally harmful, and apply unnecessary stress to electrical connections.
Innovation Solution
An electronic component with a coil spring terminal that fits into a guidance groove of the component body, allowing expansion and contraction, and contacts the printed circuit board in a compressed state, eliminating the need for soldering and conductive adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soldering is performed to connect terminal to printed circuit board, then electrical connection is achieved, but assembly cost increases and environmental load is generated
Solution Approach 1:
The invention extracts and eliminates the soldering process from the assembly method. Instead of using solder to connect the terminal to the printed circuit board, the terminal directly contacts the board through its own elastic structure, removing the need for additional soldering materials and processes, thereby reducing assembly cost and environmental load while maintaining electrical connection reliability
Solution Approach 2:
The terminal structure serves its own connection function through its elastic body design. The coil spring terminal inherently provides both electrical conductivity and mechanical connection through its compressed state against the printed circuit board, eliminating the need for separate soldering operations to achieve electrical connection
2Manufacturing precision
If soldering is performed by soldering robot, then connection precision is improved, but facility cost increases
Solution Approach 1:
The invention removes the requirement for soldering robots and associated facility investments. The mechanical contact design allows for simple assembly processes that do not require precision soldering equipment, thereby reducing facility costs while maintaining adequate connection precision through the elastic terminal structure
Solution Approach 2:
Instead of using complex automated soldering equipment to achieve precise connections, the invention inverts the approach by designing a terminal structure that achieves reliable connection through its own mechanical properties (elasticity and compression), eliminating the need for expensive soldering infrastructure
3Reliability
If operator performs soldering, then connection is achieved, but number of man-hours increases
Solution Approach 1:
The invention extracts the time-consuming soldering operation from the assembly process. The terminal's elastic structure enables direct mechanical and electrical connection that can be achieved through simpler, faster assembly methods, significantly reducing the man-hours required while maintaining reliable electrical connection
Solution Approach 2:
The terminal structure performs its own connection function through elastic compression, eliminating the need for manual soldering operations. The coil spring design inherently provides both mechanical retention and electrical conductivity, allowing for rapid assembly without skilled labor or time-intensive soldering processes
4Force
If impact is applied to electronic component, then mechanical force is transmitted, but load is applied to electrical connection portion
Solution Approach 1:
The elastic body of the terminal acts as a cushioning element that absorbs and distributes mechanical impact forces before they can be transmitted to the electrical connection portion. This beforehand cushioning protects the solder joints or connection points from excessive stress while still allowing the terminal to maintain electrical contact
Solution Approach 2:
The terminal structure incorporates dynamic elasticity through its coil spring design, allowing it to flex and absorb mechanical shocks. This dynamic response enables the terminal to withstand impact forces by deforming elastically rather than transmitting rigid stress to the electrical connection portion, thereby maintaining connection reliability under mechanical stress
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
Reduces assembly costs and stress on electrical connections while minimizing environmental impact and improving handling and transportability of electronic components.
Implementation Method 1
the terminal is a coil spring that is fitted to a guidance groove provided in the electronic component main body in a manner capable of expanding and contracting
Data Source
AI summary
This electronic component, electronic component terminal structure and electronic device do not use solder, and as a result, make it possible to prevent an environmental impact, reduce assembly cost and reduce the burden on an electrical connecting section. An electronic component equipped with an electronic component main body and a conductive terminal, wherein the terminal is a coil spring which is expandably fitted into a guide groove provided to the electronic component main body, and contacts a printed circuit board while in a compressed state. For example, the guide groove extends in a prescribed direction and connects the interior of the electronic component main body and the exterior thereof to one another, and the coil spring is supported so as not to fall to the exterior side of the electronic component main body from the guide groove.