Linear Vibrator Pole Plate Recess Shock Absorption

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Linear vibrators with a parallel vibrating direction face issues where the vibrating unit can crash onto the housing when dropped, causing noise or damage due to movement perpendicular to the vibrating direction, which existing designs fail to adequately address.

Innovation Solution

A linear vibrator design featuring a weight suspended by elastic members, a magnet assembly, and magnetic fluids, where the weight includes a pole plate and recess to absorb shocks and prevent damage, with the magnetic fluids acting as a damper to prevent the vibrating unit from crashing during drops.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If the vibrating unit moves in a direction parallel to the mounting surface to decrease vibrator height, then the height is reduced, but the vibrating unit may crash onto the housing when dropped causing noise or damage

Engineering Contradiction:

Improvevibrator heightVSAvoiddamage resistance during dropping

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The patent applies beforehand cushioning by providing a receiving space within the housing that is configured to receive the vibrating unit when it moves perpendicular to the vibrating direction during dropping. This pre-designed space prevents the vibrating unit from crashing onto the housing, thereby resolving the reliability issue while maintaining the low-height parallel vibration design.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent uses the receiving space as an intermediary structure between the vibrating unit and the housing. When the vibrating unit moves during dropping, the receiving space absorbs the impact and prevents direct contact with the housing, thus mediating the harmful effect and preventing damage or noise.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the vibrating unit moves perpendicular to the mounting surface to generate vibration, then the tactile feedback is effective, but the height of the vibrator increases

Engineering Contradiction:

Improvetactile feedback effectivenessVSAvoidvibrator height

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent changes the vibration direction from perpendicular to parallel with the mounting surface, effectively moving the vibration from one dimension (vertical) to another dimension (horizontal). This dimensional change allows the vibrator to maintain low height while still providing effective tactile feedback through parallel vibration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If the vibrating unit is allowed to move freely during dropping, then the structure remains simple, but noise or damage occurs due to crashing onto the housing

Engineering Contradiction:

Improvestructural simplicityVSAvoidnoise and damage from dropping

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The receiving space is pre-configured within the housing structure to cushion the vibrating unit during dropping. This beforehand cushioning approach prevents noise and damage without requiring complex active control systems, maintaining relative structural simplicity while eliminating harmful effects.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent converts the harmful impact motion during dropping into a beneficial cushioning effect by designing the receiving space to accommodate and absorb the vibrating unit's movement. The harmful crashing motion is transformed into a controlled movement within the receiving space, preventing damage and noise.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 effectively prevents damage and noise by allowing the vibrating unit to move parallel to the mounting surface while absorbing shocks, ensuring the magnetic fluids recover and maintain their position, thus protecting the unit and housing.

Implementation Method 1

a coil positioned on the bottom wall and generating an electromagnetic force to drive the weight to vibrate

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

a plurality of elastic member 14, a weight 15 suspended by the elastic members 14

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

with the magnetic fluids acting as a damper to prevent the vibrating unit from crashing during drops

Methodology Applied

Scientific EffectDamping: Damping

Data Source

PatentUS9048718B2Linear vibrator having pole plate positioned in weight thereof

Publication Date: 2015.06.02 AMERICAN AUDIO COMPONENTS

AI summary

A linear vibrator is disclosed. The linear vibrator includes a housing having a base and a cover, a number of elastic members connected to the housing, a vibrating unit suspended in the housing by the elastic members, and a coil positioned in the housing. The vibrating unit includes a pole plate received in a recess formed in the vibrating unit, and a damper positioned on the pole plate by magnetic flux.