Linear Vibration Motor Support Frame With Rolling Impact Resistance
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Solution Overview
Problem
Existing linear vibration motors using leaf springs suffer from poor impact resistance and vibration resistance, leading to deformation and damage during falling impacts and repeated vibrations, with challenges in determining suitable thickness and material for improved elasticity and strength.
Innovation Solution
A linear vibration motor design featuring a support frame with receiving grooves and support members, utilizing magnetic members to maintain the support frame at an initial position and drive it along a straight line, with balls or rollers supporting the frame to prevent deformation and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the leaf spring is increased to improve impact resistance and vibration resistance, then the elasticity and strength of the leaf spring are improved, but the supporting effect and controllability of the leaf spring are reduced
Solution Approach 1:
The patent replaces the traditional leaf spring mechanical support system with a magnetic field-based support system. Magnetic members are arranged between the support frame and the case to provide magnetic repulsion force, eliminating the need for physical leaf springs. This substitution allows the support frame to be held at a predetermined position through magnetic force while maintaining full controllability through the driver, thereby resolving the contradiction between impact resistance and controllability.
2Reliability
If the material of the leaf spring is changed to improve vibration resistance and impact resistance, then the durability is improved, but the strength is reduced
Solution Approach 1:
The patent replaces the mechanical leaf spring system with a magnetic field-based support system. By using magnetic members to provide support force, the system eliminates the need for material-dependent mechanical springs. The magnetic repulsion force provides both the necessary support strength and vibration/impact resistance without the trade-offs associated with material selection for traditional springs.
3Device complexity
If a leaf spring is used as a support member to fix and support the vibrator, then the结构简单性 is improved, but the falling test performance and life test performance are poor
Solution Approach 1:
The patent replaces the mechanical leaf spring support system with a magnetic field-based support system. The magnetic members provide support force without physical contact, eliminating the deformation and damage problems that occur with traditional leaf springs during falling tests and life tests. This substitution maintains structural simplicity while dramatically improving reliability under harsh conditions.
4Ease of operation
If the thickness of the leaf spring is reduced to improve controllability, then the ease of operation is improved, but the impact resistance and vibration resistance are reduced
Solution Approach 1:
The patent replaces the mechanical leaf spring system with a magnetic field-based support system. The magnetic repulsion force provides support and resistance to impact and vibration without requiring a physical spring structure. This allows the support frame to be easily controlled through the driver while maintaining high impact and vibration resistance through the magnetic field, resolving the contradiction between controllability and reliability.
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 provides high impact resistance and vibration resistance, preventing deformation and damage, and allows for precise control of the support frame movement, improving the motor's reliability and durability.
Implementation Method 1
when the driver drives the support frame to move relative to the case, the support member rolls relative to the case and the support frame
Implementation Method 2
the second magnetic member is configured to cooperate with the first magnetic member to maintain the support frame at an initial position when the coil is powered off, and drive the first magnetic member to drive the support frame to move along the straight line when the coil is powered on
Data Source
AI summary
Provided are a linear vibration motor and an electronic device. In a receiving space enclosed by a case, a follower is at a support frame of a vibrator, and a driver is opposite to the follower for driving the follower to drive the support frame to move along a straight line. The support frame is provided with receiving grooves. Each receiving groove is provided with at least one support member, part of which is located outside the receiving groove. The support member is pressed against the case by the support frame and configured to support the support frame. When the driver drives the support frame to move relative to the case, the support member rolls relative to the case and the support frame, the support frame stably moves, and the receiving groove is located in the receiving space and does not deform due to an influence of any impact.