Magnetically Guided Vibrator for Flat Frequency Response

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Solution Overview

Problem

Conventional vibration generating devices face challenges in flattening the frequency characteristic due to the use of elastic members, which limits the bandwidth of peak resonant frequency.

Innovation Solution

A vibrator design that supports a movable body with a support mechanism allowing oscillation in the left-right direction without using an elastic member, utilizing a core and permanent magnets to generate alternating magnetic fields, and restricting movement in the front-rear and vertical directions while allowing movement in the left-right direction, enhancing the frequency characteristic.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an elastic member is used to support the vibrator, then the vibrator can be supported and oscillate, but the frequency characteristic cannot be flattened and the bandwidth of peak resonant frequency is limited

Engineering Contradiction:

Improvefrequency characteristic flatnessVSAvoidsupport structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention extracts and removes the elastic member from the support structure. By eliminating the elastic member that causes frequency characteristic degradation, the vibrator can oscillate without the harmful elastic effects while maintaining structural support through alternative means (housing walls or rigid supports).

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces the mechanical elastic support system with an alternative support mechanism that does not rely on elastic deformation. The vibrator is supported by rigid structures (housing walls or fixed supports) that constrain movement in unwanted directions while allowing oscillation in the intended direction, substituting elastic mechanical support with rigid mechanical constraints.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If the movable body is allowed to oscillate freely in multiple directions, then the oscillation range is increased, but vibrations in unwanted directions (front-rear and vertical) cannot be restricted

Engineering Contradiction:

Improveoscillation direction controlVSAvoidunwanted direction vibrations

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The invention applies asymmetric constraints to the movable body. The support structure provides different levels of constraint in different directions: it allows free oscillation in the left-right direction while providing strong constraints in the front-rear and vertical directions. This asymmetric support approach enables controlled oscillation while suppressing unwanted vibrations.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The invention converts the potential harmful effect of unrestricted oscillation into a beneficial controlled oscillation. By strategically placing constraints that restrict movement in unwanted directions (front-rear and vertical) while permitting movement in the desired direction (left-right), the structure transforms what would be harmful multi-directional vibrations into useful controlled oscillations.

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 vibrator achieves a flattened frequency characteristic, increasing the bandwidth of the peak resonant frequency and reducing vibrations in the front-rear and left-right directions.

Implementation Method 1

An alternating current is supplied to an electromagnet provided in the vibrator, generating an alternating magnetic field around the electromagnet

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

This alternation produces attractive and repulsive forces between the electromagnet and the permanent magnet, causing the vibrator to oscillate

Methodology Applied

Scientific EffectMagnetic force interaction: Magnetism

Implementation Method 3

both poles of which face one end of the core, and are arranged along the left-right direction... move leftward when a current in one direction flows through the coil, with a further movement leftward being restricted by an attractive force between the one end of the core and one pole of the permanent magnet

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentUS20250274025A1vibrator

Publication Date: 2025.08.28 ALPS ALPINE CO LTD

AI summary

A vibrator includes a housing, a movable body, and a support to support the movable body, wherein the movable body includes a core and a coil, a permanent magnet is fixed inside the housing, and both poles of which face one end of the core, an inertial force in a direction opposite to a movement of the movable body is alternately transmitted to the housing, the support is a guide, and the movable body moves leftward when a current in one direction flows through the coil, with a further movement leftward being restricted by an attractive force between the one end of the core and one pole of the permanent magnet, and moves rightward when a current in another direction flows through the coil, with a further movement rightward being restricted by an attractive force between the one end of the core and another pole of the permanent magnet.