Vibration Motor Coil Isolation Structure Against Casing Contact
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Solution Overview
Problem
Existing vibration motors face challenges in ensuring that the coil lead is securely attached to the coil, leading to potential electrical contact with the casing under pressure or impact, which can cause damage and adverse effects.
Innovation Solution
A vibration motor design that includes a circuit board with a bonding pad and a coil with a lead wire, where an avoiding portion with back glue isolates the lead wire from the casing, preventing electrical contact and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coil lead is welded and fixed to the circuit board without additional isolation measures, then the manufacturing process is simple, but the lead wire may contact the casing under pressure or impact causing electrical contact and damage
Solution Approach 1:
The patent introduces an avoiding portion (isolation structure) between the lead wire and the casing that prevents direct contact. This intermediary structure acts as a mediator that physically separates the electrical conductor from the metal casing, eliminating the risk of electrical contact while maintaining overall structural simplicity.
Solution Approach 2:
The circuit board is divided into functional areas including a bonding pad area and an avoiding portion. This segmentation separates the electrical connection zone from the isolation zone, allowing the lead wire to be securely welded to the bonding pad while the avoiding portion provides physical separation from the casing edges.
2Reliability
If the coil lead is tightly attached to the coil, then the electrical connection is secure, but the lead wire remains vulnerable to contact with the casing under pressure or impact
Solution Approach 1:
The avoiding portion serves as an intermediary barrier between the secured lead wire and the casing. Even when the lead wire is tightly attached to ensure electrical reliability, the avoiding portion maintains physical separation that prevents impact forces from causing the lead wire to contact the casing.
Solution Approach 2:
The avoiding portion is designed in advance to anticipate and prevent potential contact between the lead wire and casing under pressure or impact. This proactive isolation structure cushions against harmful effects before they can occur.
3Volume of moving object
If the circuit board is positioned close to the casing to save space, then the device compactness is improved, but the lead wire is more likely to contact the casing under pressure
Solution Approach 1:
The circuit board layout is segmented into different functional zones: the bonding pad area for electrical connection and the avoiding portion for isolation. This segmentation allows the circuit board to be positioned close to the casing for compactness while the avoiding portion maintains the necessary clearance to prevent lead wire contact.
Solution Approach 2:
The avoiding portion provides localized isolation quality at the critical area where the lead wire exits the circuit board. This local quality enhancement ensures electrical isolation reliability specifically where needed, while the rest of the device can maintain compact dimensions.
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 use of back glue in the avoiding portion effectively isolates the lead wire from the casing, preventing electrical contact and damage to the coil, thereby enhancing the motor's stability and reliability.
Implementation Method 1
the avoiding portion is provided with back glue that isolates the lead wire from the casing
Implementation Method 2
A vibration motor is a transmission device that directly converts electrical energy into linear motion mechanical energy
Data Source
AI summary
The vibration motor includes a casing, a stator, a vibrator, and an elastic connector suspended inside the casing. The stator includes a circuit board fixed to the casing and a coil fixedly connected to the circuit board. The circuit board includes a bonding pad, and the coil includes a coil body and a lead wire. The circuit board is provided with an avoiding portion that avoids a junction between the lead wire and the coil body, and the avoiding portion is provided with back glue that isolates the lead wire from the casing. The vibration motor of the present application isolates the lead wire of the coil and the casing by adding back glue at the avoiding portion, which prevents the lead wire of the coil from being in electrical contact with the casing caused by the coil being damaged under pressure or impact, thereby preventing adverse effects.