Mobile Phone Case Strap Mount With Hidden Fixing Part

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Solution Overview

Problem

Conventional mobile phone case accessories face issues such as damage to connecting portions, entry of foreign matter, degradation of mobile phone protection, and deformation due to external forces acting on straps, particularly when straps are tied or connected to exposed rings.

Innovation Solution

A mobile phone case design with an insertion part and through-holes of varying cross-sections supports a fixing part that secures a strap, preventing external forces from deforming the case and keeping the fixing part hidden from exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a ring with connecting portion is used to attach accessories, then the accessory can be connected to the mobile phone case, but the connecting portion is exposed to the outside and frequently damaged

Engineering Contradiction:

Improveaccessory attachmentVSAvoidconnecting portion durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The connecting portion is nested inside the mobile phone case body, with only the necessary protruding part extending through the case to attach the accessory. This hidden connecting portion design protects the fragile connection points from external damage while maintaining accessory attachment functionality.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If a strap is tied in a hole formed in the mobile phone case, then the strap can be secured, but foreign matter may enter and the mobile phone protecting function is degraded

Engineering Contradiction:

Improvestrap securingVSAvoidforeign matter entry

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The strap securing function is segmented into a dedicated strap hole separate from the main case body opening. The strap hole is specifically designed with appropriate size and position to secure the strap while minimizing exposure to foreign matter, maintaining the protective function of the case.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If a strap is tied in a hole formed in the mobile phone case, then the strap can be secured, but the mobile phone case may be deformed due to external force acting on the strap

Engineering Contradiction:

Improvestrap securingVSAvoidcase structural stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

A strap hole cover or reinforcement structure acts as an intermediary between the strap and the case body. This intermediary component distributes the external force acting on the strap across a larger area of the case, preventing localized deformation while maintaining strap securing functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Ease of operation

If the fixing part supporting the strap is exposed, then the strap can be attached, but the fixing part is damaged by external forces

Engineering Contradiction:

Improvestrap attachmentVSAvoidfixing part strength

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The fixing part is nested within the mobile phone case structure, with only the minimal necessary portion extending outward to attach the strap. This nested design protects the bulk of the fixing part from external forces while maintaining the strap attachment function.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS20250380778A1Mobile phone case and accessory for the same

Publication Date: 2025.12.18 HAMEE GLOBAL INC

AI summary

The present invention relates to a mobile phone case including a front surface that is open, a rear surface facing the front surface, a sidewall connected to the rear surface, an insertion part inserted from an inner surface of the sidewall toward an outer surface of the sidewall by passing through one portion of the sidewall, and a through-hole passing through the sidewall facing the insertion part.