Segmented Handset Lens Case with Snap-Fit Mounting

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Solution Overview

Problem

Existing holding cases for installing handset add-on lenses are bulky, inconvenient to carry, and difficult to assemble and disassemble, as they can only mount a back add-on lens and obstruct the camera due to their large size and weight, and require manual adjustment for accurate alignment.

Innovation Solution

A compact holding case with a housing body that allows simultaneous mounting of front and back add-on lenses, featuring a snap-fit structure with resilient strips for easy assembly and disassembly, and a connection system that prevents obstruction of the camera and reduces abrasion, enabling secure and convenient attachment of external lenses and fill lights.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the holding case is mounted on the entire back of the handset by snap-fitting, then the back add-on lens can be securely mounted, but the holding case becomes large and heavy, making it inconvenient to carry and mount

Engineering Contradiction:
Improvesecure mounting of back add-on lensVSAvoidweight of holding case
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The holding case is divided into a first holding portion for the back add-on lens and a second holding portion for the front add-on lens, with each portion having its own snap-fit connection structure. This segmentation allows the case to be mounted only where needed rather than covering the entire back of the handset, reducing overall size and weight while maintaining secure mounting capability.

Inventive Principle:
Principle #1Segmentation

2Reliability

If the holding case is mounted on the entire back of the handset by snap-fitting, then the back add-on lens can be securely mounted, but the holding case becomes large and bulky, making it inconvenient to carry around

Engineering Contradiction:
Improvesecure mounting of back add-on lensVSAvoidvolume of holding case
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The holding case is divided into separate first and second holding portions that can be selectively positioned on the handset. Only the necessary portions are mounted, reducing the overall volume of the holding case while maintaining secure mounting capability for the back add-on lens.

Inventive Principle:
Principle #1Segmentation

3Reliability

If the holding case is mounted on the entire back of the handset, then the back add-on lens can be mounted, but the camera becomes obstructed and the case is inconvenient to mount and demount

Engineering Contradiction:
Improvemounting of back add-on lensVSAvoidease of mounting and demounting
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The holding case uses separate snap-fit connection structures for the first and second holding portions, allowing selective mounting and demounting of only the necessary portions. This reduces the complexity of mounting and demounting operations compared to a full-back mounting approach, while still ensuring reliable attachment of the back add-on lens.

Inventive Principle:
Principle #1Segmentation

4Device complexity

If only a back add-on lens is mounted on the holding case by snap-fitting, then the mounting structure is simple, but a front add-on lens cannot be mounted at the same time

Engineering Contradiction:
Improvesimplicity of mounting structureVSAvoidability to mount front and back add-on lenses
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The holding case is divided into a first holding portion with a snap-fit connection structure for the back add-on lens and a second holding portion with a snap-fit connection structure for the front add-on lens. This segmentation allows both front and back add-on lenses to be mounted simultaneously while maintaining relative simplicity of the mounting structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The holding case is designed with multiple holding portions that can accommodate different types of add-on lenses (both front and back), making it a multi-functional accessory that can be adapted to various photographing needs while maintaining a unified mounting mechanism.

Inventive Principle:
Principle #6Universality (Multi-functionality)

5Device complexity

If manual adjustment is required for accurate alignment of the holding case with the camera, then the mounting structure is simple, but the alignment process becomes inconvenient and time-consuming

Engineering Contradiction:
Improvesimplicity of mounting structureVSAvoidtime for alignment adjustment
Core Design Contradiction:
Device complexityVSLoss of time

Solution Approach 1:

The holding case is pre-designed with alignment features and positioning structures that automatically guide the add-on lenses into correct alignment with the handset cameras during the mounting process. This preliminary design of alignment capabilities eliminates the need for manual adjustment after mounting, reducing the time required while maintaining structural simplicity.

Inventive Principle:
Principle #10Preliminary action

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 solution provides a compact and convenient way to attach both front and back add-on lenses, ensuring secure and easy connection, preventing camera obstruction, and allowing for enhanced photography features like long-distance shooting, optical zooming, and light compensation without affecting the handset's portability or usability.

Implementation Method 1

a snap-fit connection structure comprising a connection body and a resilient strip, wherein the resilient strip is adapted for elastically deforming under the action of external force

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3288244B1Holding case for installing handset add-on lens, handset external lens connection structure, and handset installation case
Publication Date: 2020.05.20 GUANGDONG SIRUI OPTICAL CO LTD
  • EP3288244B1 patent drawingFigure 1
  • EP3288244B1 patent drawingFigure 2~3
  • EP3288244B1 patent drawingFigure 4~6

AI summary

The present application relates to a holding case for installing handset add-on lens. The holding case comprises a housing body, the housing body has a front side wall and a back side wall that are oppositely disposed, a space between the front side wall and the back side wall is adapted for fitting one end of a handset provided with a front camera and a back camera, a front add-on lens snapping opening is provided in the front side wall and corresponds to the front camera of the handset, and a back add-on lens snapping opening is provided in the back side wall and corresponds to the back camera of the handset. In addition, the present application also discloses a connection fastener assembly and a handset external lens connection structure.