Detachable Cover Attachment Structure to Prevent Unintended Falling Off

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Solution Overview

Problem

Existing electronic devices with covering members face challenges in easily detaching the covering member without it unintentionally falling off, and existing solutions like screws can complicate the detachment process and affect the device's appearance.

Innovation Solution

The electronic device incorporates a housing with a specific geometry and a covering member attached via an attachment part, which includes projections and accommodation parts to securely attach and detach the covering member. This design ensures easy detachment while preventing unintended falling off without the need for screws.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a covering member is detachably attached to a housing, then the covering member can be easily detached, but the covering member may unintentionally fall off

Engineering Contradiction:

Improveease of detachmentVSAvoidprevention of unintended falling off

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The attachment part is divided into multiple independent attachment portions (first attachment portion with first projection and first accommodation part, second attachment portion with second projection and second accommodation part). Each attachment portion independently secures the covering member, providing both ease of detachment and reliable prevention against unintended falling off through distributed attachment points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The projections are inserted into the accommodation parts, forming a nested structure where the covering member's attachment features fit within the housing's receptacles. This nesting mechanism enables simple insertion and removal while maintaining secure attachment during normal use.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If screws are used to attach the covering member, then the covering member is securely fixed, but the device's appearance is affected and detachment becomes complicated

Engineering Contradiction:

Improvesecure fixationVSAvoidcomplexity of attachment structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The traditional screw fastening mechanism is extracted and replaced with a projection-accommodation part interface. This eliminates the need for threaded fasteners, simplifying the attachment structure while maintaining secure fixation and preserving the device's aesthetic appearance by hiding the attachment mechanism within the housing.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The projection and accommodation part act as an intermediary mechanism between the covering member and housing, providing secure attachment without requiring visible screws or complex fastening systems. The geometric interlocking of these elements achieves reliable fixation while maintaining a clean external appearance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the covering member is tightly attached to prevent falling off, then reliability is improved, but ease of detachment deteriorates

Engineering Contradiction:

Improvesecure attachmentVSAvoidease of detachment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The attachment system provides dynamic characteristics where the projection fits snugly into the accommodation part during normal use (providing secure attachment), but can be easily removed when intentional force is applied (enabling easy detachment). The geometric interface allows for both stable engagement and controlled disengagement.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of using a mechanism that requires complex operations for detachment (like screws needing unscrewing), the design inverts the approach by using a simple insertion-based attachment where detachment is achieved by reversing the insertion motion. This makes the detachment process as simple as the attachment process.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12235685B2Electronic device

Publication Date: 2025.02.25 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

An electronic device includes a housing, a covering member that covers the housing, and an attachment part that detachably attaches the covering member to the housing. The attachment part includes a one-side attachment part and at least one other-side attachment part. The one-side attachment part includes a first projection of the covering member extending from a first member toward a second member, a first accommodation part of the housing that accommodates the first projection, and a first movement restriction part that restricts movement of the first projection. The other-side attachment part includes a protrusion of the covering member extending from a second member toward a third surface of the housing, a second projection extending from the protrusion in a direction away from the first member, a second accommodation part of the housing that accommodates the second projection, and a second movement restriction part that restricts movement of the second projection.