Electric Device Housing Vibration Isolation via Elastic Member

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Solution Overview

Problem

Existing electric devices with battery packs face vibration issues due to insufficient vibrational absorption, leading to potential electrical disconnection between the battery pack and the device's main body, which affects durability and reliability.

Innovation Solution

The electric device incorporates a first and second housing with an elastic member in between, along with restricting portions to absorb vibrations and prevent separation, ensuring secure electrical connection and enhanced durability by dispersing stress and preventing direct contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the second housing is connected directly to the first housing, then structural simplicity is improved, but electrical disconnection risk increases due to vibration

Engineering Contradiction:

Improvehousing connection structureVSAvoidelectrical connection stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The buffer member serves as an intermediary connection element between the first housing and second housing. It maintains the connection while isolating vibrations, thereby preventing electrical disconnection without significantly increasing structural complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The buffer member functions as a flexible element that allows the second housing to remain connected to the first housing while accommodating vibrational movements. This flexible connection prevents electrical disconnection while maintaining structural simplicity.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If the elastic member is positioned close to the housing connection, then vibration absorption is improved, but stress concentration increases

Engineering Contradiction:

Improvevibration absorption efficiencyVSAvoidstress distribution

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The buffer member is positioned at a specific location between the first housing and second housing where it can effectively absorb vibrations without creating stress concentration. The local positioning optimizes both vibration absorption efficiency and stress distribution.

Inventive Principle:

Principle #3Local quality

3Reliability

If restricting portions are added to prevent housing separation, then connection stability is improved, but device complexity increases

Engineering Contradiction:

Improvehousing connection stabilityVSAvoidrestricting portion structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The restricting portions are integrated into the existing housing structure, merging the separation prevention function with the overall housing design. This combining approach improves connection stability without significantly increasing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

This configuration effectively suppresses vibration transmission to the battery pack, prevents electrical disconnection, and enhances the durability of the electric device by absorbing vibrations and distributing stress, thereby improving the device's operational reliability and longevity.

Implementation Method 1

vibration generated in the load portion due to power consumption is absorbed by the elastic member to restrain transmission of vibration to the second housing

Methodology Applied

Scientific EffectVibration absorption: Damping

Implementation Method 2

the elastic member is deformed and the first restricting portion and the second restricting portion are engaged with each other

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 3

the first restricting portion and the second restricting portion are engaged with each other to prevent the second housing from being separated from the first housing

Methodology Applied

Scientific EffectMechanical engagement: Mechanical Fastener

Implementation Method 4

the second elastic member can prevent the first housing from coming into direct contact with the second housing

Methodology Applied

Scientific EffectElastic cushioning: Damping

Data Source

PatentUS11577376B2Electric device

Publication Date: 2023.02.14 KOKI HLDG CO LTD

AI summary

Provided is an electric device capable of suppressing vibration of a battery pack. Included are: a first housing 21 accommodating a load portion that consumes electric power; a second housing 22 having one end portion connected to the first housing 21 and another end portion to which a battery pack 9 is connectable; and an elastic member 40 interposed between the first housing and the second housing. The first housing includes a first restricting portion 42 positioned away from the elastic member, and the second housing includes a second restricting portion 44 positioned away from the elastic member and engageable with the first restricting portion. In a case where the second housing is urged to be separated from the first housing, the elastic member is deformed and the first restricting portion and the second restricting portion are engaged with each other to prevent separation.