Dual-Shock Damping Structure for Electronic Devices

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Solution Overview

Problem

Conventional shock damping structures in electronic devices, such as wristwatches, are limited in their ability to absorb both strong and weak external shocks, as they rely solely on elastic deformation of shock damping members, which may not effectively absorb weak shocks and can transmit strong shocks to internal modules.

Innovation Solution

A dual-shock damping structure comprising a first shock absorbing member that deforms elastically to absorb strong shocks and a second shock absorbing member that changes volume to absorb and escape both strong and weak shocks, ensuring comprehensive shock absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single shock damping member made of elastic material is used, then strong shocks can be absorbed through elastic deformation, but weak shocks cannot be absorbed and are transmitted directly to the module

Engineering Contradiction:

Improveshock absorption capabilityVSAvoidshock transmission to module

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The shock damping member is divided into two distinct parts: a first shock absorbing member made of elastic material for absorbing strong shocks, and a second shock absorbing member made of viscoelastic material for absorbing weak shocks. This segmentation allows each part to specialize in different shock intensity ranges, solving the problem of weak shock transmission while maintaining strong shock absorption capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses composite materials with different damping characteristics - combining elastic material (for strong shock absorption) and viscoelastic material (for weak shock absorption). This composite approach enables the shock damping member to effectively handle both weak and strong shocks, resolving the contradiction between absorbing strong shocks and preventing weak shock transmission

Inventive Principle:

Principle #40Composite materials

2Device complexity

If elastic material is used for shock damping, then the structure maintains simplicity, but the range of shock forces that can be absorbed is limited

Engineering Contradiction:

Improvedamping member structureVSAvoidshock force absorption range

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

Different regions of the shock damping member are assigned different material properties: the first shock absorbing member uses elastic material optimized for strong shocks, while the second shock absorbing member uses viscoelastic material optimized for weak shocks. This local quality differentiation expands the overall shock absorption range while maintaining relatively simple structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention changes the material parameter (elasticity vs. viscoelasticity) of different parts of the shock damping member to match different shock force ranges. By adjusting material parameters locally, the system achieves versatile shock absorption across a wide range of forces without significantly increasing structural complexity

Inventive Principle:

Principle #35Parameter changes

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 dual-shock damping structure securely absorbs any external shock, whether strong or weak, protecting the internal module and electronic parts by distributing and dissipating the shock force effectively, thereby enhancing the durability of electronic devices.

Implementation Method 1

a first shock absorbing member disposed to cover a predetermined part of the upper and outer peripheral surface portions of the holding member, deformed elastically when the external shock is applied on the device case, and absorbing the shock elastically

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a second shock absorbing member disposed to cover the other part of the upper and outer peripheral surface portions of the holding member, the other part excluding the predetermined part, getting the external shock earlier than the first shock absorbing member when the external shock is applied on the device case, changing its volume in accordance with the shock force, and absorbing and escaping the external shock

Methodology Applied

Scientific EffectVolume change: Compression

Data Source

PatentUS8708552B2Damping member, shock damping structure in electronic device, and electronic device using the shock damping structure

Publication Date: 2014.04.29 CASIO COMPUTER CO LTD

AI summary

A damping member includes a body provided between a device case and a module encased within the case and damping an external shock applied on the case. The body includes a holding member having upper and side surfaces and disposed between an inner peripheral surface of the case and an outer peripheral surface of the module, a first shock absorbing member covering a predetermined part of the upper and side surfaces of the holding member, deformed elastically when the shock is applied on the case, and elastically absorbing the shock, and a second shock absorbing member covering the other part of the holding member, getting the shock earlier than the first shock absorbing member when the shock is applied on the case, each changing its volume in accordance with the shock, and absorbing and escaping the shock. A damping structure used for an electronic device uses the damping member.