Button Motor Structure With Unmetallic Elastic Member for Higher Drive Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing button motors have a large metal elastic member that occupies space, resulting in a smaller magnet size and reduced driven force.
Innovation Solution
A button motor design featuring an unmetallic elastic member made of silicone or rubber, sandwiched between the iron core and frame, allowing for a larger magnet size and improved driven force, with a stator comprising magnet units on both sides of the coil and a flexible circuit board configuration for precise displacement detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal elastic member is used to suspend the vibrator, then the vibrator can be supported with sufficient structural strength, but the elastic member occupies larger space in the motor, resulting in a smaller magnet size and lower driven force
Solution Approach 1:
The patent changes the material parameter of the elastic member from metal to unmetallic material (such as rubber or silicone). This material substitution allows the elastic member to achieve the required structural strength while occupying less space, thereby resolving the contradiction between strength and volume.
Solution Approach 2:
The patent employs composite material construction for the elastic member, combining unmetallic materials with appropriate structural design to achieve both flexibility and sufficient strength. This composite approach enables the elastic member to provide adequate support while minimizing space occupation.
2Force
If a metal elastic member is used, then the vibrator is properly supported, but the magnet size is reduced and driven force is lowered
Solution Approach 1:
By changing the material parameter from metal to unmetallic material, the elastic member occupies reduced space, which directly enables the magnet to be enlarged. This material substitution resolves the contradiction between driven force and magnet size.
3Force
If a larger magnet is used to increase driven force, then the motor performance is improved, but the overall motor size would increase
Solution Approach 1:
The patent changes the material parameter of the elastic member to unmetallic material, which reduces the space occupied by this component. This space reduction allows for a larger magnet within the same overall motor volume, thereby increasing driven force without expanding the motor size.
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 design reduces the space occupied by the elastic member, enabling a larger magnet size and enhanced driven force while improving precision in detecting press position and pressure.
Implementation Method 1
an unmetallic elastic member sandwiched between the iron core and the frame, configured to deform along the first direction
Implementation Method 2
a coil wound on the iron core and arranged opposite to the magnet unit
Implementation Method 3
a magnet unit mounted on the frame; a coil wound on the iron core and arranged opposite to the magnet unit
Implementation Method 4
a sensor configured to detect the displacement of the vibrator
Data Source
AI summary
The present disclosure discloses a button motor a frame, having a receiving space; a stator received in the receiving space, including a magnet unit mounted on the frame; a vibrator moving along a first direction relative to the stator, including: an iron core fixedly connected with the button; and a coil wound on the iron core and arranged opposite to the magnet unit; a button fixed on the vibrator; a FPC mounted on the frame and electrically connected with the coil; a sensor configured to detect the displacement of the vibrator; and an unmetallic elastic member sandwiched between the iron core and the frame, configured to deform along the first direction.