Stepping Motor Snapping Boss and Securing Pins
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Solution Overview
Problem
The existing method of directly securing stepping motors to a circuit board, where current conducting terminal pins are soldered, leads to increased distance between pins, resulting in inferior working efficiency, wire breakage, and design limitations due to compulsory wire guiding.
Innovation Solution
A stepping motor structure featuring an axially protruding boss portion that snaps into the circuit board, with current conducting terminal pins and securing pins arranged to sandwich the boss portion, allowing for soldering at two locations to distribute stress and provide flexibility in wire guiding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current conducting terminal pins are arranged at the end surface of the stepping motor for direct soldering to the circuit board, then the motor can be secured to the circuit board, but the distance between the terminal pins increases, limiting wire guiding flexibility and causing wire breakage
Solution Approach 1:
The patent divides the securing function into two separate components: current conducting terminal pins for electrical connection and snapping front boss with securing holes for mechanical mounting. This segmentation allows the terminal pins to be positioned optimally for wire guiding while the boss provides stable mechanical support, resolving the contradiction between securing reliability and wire guiding flexibility
Solution Approach 2:
The snapping front boss acts as an intermediary component between the motor body and the circuit board. It provides additional mounting points and structural support, enabling the terminal pins to be arranged with optimal spacing for wire guiding without compromising the overall securing reliability of the motor assembly
2Device complexity
If only current conducting terminal pins are used for soldering to secure the motor, then the structure is simple, but stress concentrates on the terminal pins, reducing their reliability
Solution Approach 1:
The securing function is segmented between the snapping front boss (providing mechanical support and additional soldering points) and the current conducting terminal pins (providing electrical connection). This distribution of functions reduces stress concentration on the terminal pins while maintaining structural simplicity
Solution Approach 2:
The snapping front boss serves multiple functions: it provides mechanical support, enables additional soldering points for stress distribution, and maintains electrical isolation. This multi-functionality allows the system to improve terminal pin reliability without significantly increasing overall device complexity
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 structure prevents stress concentration on current conducting terminal pins, enhances wire guiding flexibility, and ensures reliable motor securing to the circuit board, reducing the risk of wire breakage and design limitations.
Implementation Method 1
an axially protruding boss portion accommodating a rotation axis in the inside, which boss portion is provided to be snapped into the circuit board
Implementation Method 2
axially protruding current conducting terminal pins that are made so as to be soldered to the circuit board, and securing pins that are made so as to be soldered to the circuit board
Data Source
AI summary
A structure reliably secures a stepping motor to a circuit board. The stepping motor has an axially protruding boss portion accommodating a shaft in the inside, which boss portion is provided to be snapped into a circuit board, axially protruding current conducting terminal pins that are made so as to be soldered to the circuit board, and securing pins not functioning as electrodes, which securing pins are made so as to be soldered to the circuit board and are arranged in a position whereby they sandwich the boss portion between themselves and the current conducting terminal pins.