Vibrator Unit Back Yoke Holding Part Design
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Solution Overview
Problem
Existing vibration generators with elastic body components suffer from fatigue at the joint parts, leading to changes in securing state and potential breakdown due to fracturing, especially when the back yoke is fitted into a slit in the elastic body component.
Innovation Solution
A vibrator unit with a magnet and back yoke, where an elastic member is used to support the vibrator, featuring a planar part and a holding part that bends towards the frame, with projecting parts fitted into holes to securely attach the vibrator, distributing stress and preventing fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the back yoke is fitted into a slit in the elastic body component, then the elastic body component can be used as a holding part, but the joint part becomes fatigued and may fracture due to repeated vibration
Solution Approach 1:
The back yoke is divided into a planar part and a holding part, where the holding part is a separate structure that embraces the vibrator attachment part. This segmentation allows the holding part to be designed as a robust embracing structure rather than a simple fitted joint, reducing fatigue at the connection point.
Solution Approach 2:
The holding part is formed by bending the planar part of the back yoke, merging the structural support function with the holding function in a single integrated component. This eliminates separate joint parts that would be susceptible to fatigue, as the holding structure becomes an inherent part of the back yoke itself.
2Strength
If the projecting part is fitted in the slit of the elastic body component, then the components are connected, but stress concentration occurs at the joint part leading to fatigue
Solution Approach 1:
The holding part is designed with a specific bending structure that distributes stress away from concentrated points. The embraced configuration creates a local structural quality that provides both strong connection and fatigue resistance through optimized stress distribution in the critical joint area.
Solution Approach 2:
The holding part's bending structure is designed in advance to cushion and distribute vibrational stresses before they can concentrate at a single point. This preemptive stress distribution prevents fatigue accumulation that would otherwise lead to failure at the joint part.
3Ease of manufacture
If the back yoke and elastic body component are integrally formed, then manufacturing is simplified, but fatigue at the joint part still occurs
Solution Approach 1:
The holding part is designed with a bending structure that provides dynamic flexibility while maintaining structural integrity. This dynamic design allows the holding part to accommodate vibrational movements without creating rigid stress concentration points, even when integrally formed with the back yoke.
Solution Approach 2:
The holding part replicates the embracing function of a separate component through the bending of the planar part. This copying of the holding function within the integral structure achieves both manufacturing simplicity and fatigue resistance by eliminating weak joint interfaces while maintaining the necessary holding capability.
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 solution provides a highly durable vibrator unit and vibration generator by reducing stress concentration and preventing local deformation of the elastic members, enhancing the reliability and longevity of the device.
Implementation Method 1
an elastic member including: a vibrator attachment part attached to the vibrator; a housing attachment part attached to the housing; and an arm part coupling the vibrator attachment part and the housing attachment part, said arm part displaceably supporting the vibrator attachment part at least in a horizontal direction
Implementation Method 2
the back yoke including a planar part arranged on or above the magnet and a holding part bending the planar part toward the frame from the planar part, the vibrator attachment part being held and embraced by the holding part
Implementation Method 3
the holding part includes a hole, the vibrator attachment part includes a projecting part, and the projecting part is fitted in the hole
Data Source
AI summary
A vibrator unit capable of being attached to a housing of a vibration generator includes a vibrator including a magnet and a back yoke arranged on or above the magnet, and an elastic member. The elastic member includes a vibrator attachment part attached to the vibrator, a housing attachment part attached to the housing, and an arm part coupling the vibrator attachment part and the housing attachment part, said arm part displaceably supporting the vibrator attachment part at least in a horizontal direction with respect to the housing attachment part. The back yoke includes a planar part arranged on or above the magnet and a holding part bending the planar part toward the frame from the planar part. The vibrator attachment part is held and embraced by the holding part.