Spring-Biased Attachment Lock for Tool-Free Accessory Swaps

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Consumer products such as watches, cameras, and glasses often lack user-friendly attachment systems, requiring special tools for accessory removal or replacement, and may not provide adequate retention force, affecting their elegance and usability.

Innovation Solution

An attachment system featuring a removable module with a spring-biased locking mechanism that securely attaches and detaches accessories from consumer products without the need for special tools, allowing for easy interchangeability of accessories and products, maintaining a sleek design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional attachment mechanisms (pins, screws) are used to attach accessories to consumer products, then adequate retention force is provided, but special tools are required for attachment and removal, and the process requires technician assistance

Engineering Contradiction:
ImproveEase of accessory attachment and removalVSAvoidComplexity of attachment mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The attachment system is divided into separate components: a receiver integrated into the consumer product and a separate attachment mechanism with a locking system. This segmentation allows the attachment mechanism to be designed independently for ease of operation while maintaining secure retention through the locking system's engagement features.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The attachment mechanism incorporates a self-locking feature where the locking system automatically engages with the receiver upon insertion, eliminating the need for special tools or technician assistance. The user can simply insert and remove accessories without requiring additional devices or skills.

Inventive Principle:
Principle #25Self-service

2Strength

If robust attachment mechanisms are used to provide adequate retention force, then secure accessory attachment is achieved, but the mechanism becomes large and adversely affects the elegance of the consumer product

Engineering Contradiction:
ImproveRetention force of attachment mechanismVSAvoidAesthetics and compactness of consumer product
Core Design Contradiction:
StrengthVSShape

Solution Approach 1:

The attachment mechanism is designed to nest within or alongside the consumer product's existing structure. The locking system engages with the receiver in a compact arrangement that minimizes external dimensions, allowing robust retention forces to be generated within a space-efficient configuration that preserves the product's elegant design.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The attachment mechanism utilizes thin-walled or flexible structural elements that can deform elastically during engagement and locking, providing adequate retention force through material flexibility rather than bulk. This allows the mechanism to maintain a sleek, minimal profile while delivering secure attachment.

Inventive Principle:
Principle #30Flexible shells and thin films

3Shape

If simple attachment mechanisms are used to maintain elegance and compactness, then the consumer product remains aesthetically pleasing, but adequate retention force is not provided

Engineering Contradiction:
ImproveAesthetics and compactness of consumer productVSAvoidRetention force of attachment mechanism
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The attachment mechanism replaces traditional robust mechanical fastening systems with a locking system that uses elastic deformation and friction-based engagement. This substitution allows the mechanism to maintain a compact, elegant appearance while generating adequate retention forces through material elasticity and precise geometric engagement rather than bulky mechanical components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Ease of operation

If user-friendly attachment systems are implemented to allow easy accessory replacement, then ease of operation is improved, but the attachment mechanism becomes more complex

Engineering Contradiction:
ImproveEase of accessory attachment and removalVSAvoidComplexity of attachment mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The attachment mechanism merges the locking and release functions into a single integrated system. The locking system automatically engages upon insertion, and the same structure provides the release mechanism, combining multiple functions into one compact assembly that simplifies user operation without requiring separate components or complex procedures.

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

The attachment system enhances user convenience by enabling tool-free attachment and detachment of accessories, providing secure retention while maintaining a compact and aesthetically pleasing design, allowing for various accessory and product combinations.

Implementation Method 1

a spring-biased locking mechanism that securely attaches and detaches accessories

Methodology Applied
Scientific EffectSpring: Spring

Data Source

PatentUS20250017326A1Attachment system for an electronic device
Publication Date: 2025.01.16 APPLE INC
  • US20250017326A1 patent drawing
  • US20250017326A1 patent drawing
  • US20250017326A1 patent drawing

AI summary

A removable module and a housing for an attachment system of a consumer product is described. The removable module includes a locking mechanism comprising a first portion having a substantially planar top surface and second portion that comprises a substantially non-planar bottom surface. The first portion and the second portion are coupled together. The locking mechanism also includes a first spring mechanism coupled between the first portion and the second portion. The first spring mechanism causes the first portion to be biased away from the second portion. The locking mechanism also includes a second spring mechanism. The second spring mechanism causes the substantially planar top surface of the first portion to be biased substantially flush with respect to the removable module and also causes the substantially non-planar bottom surface of the second portion to be biased proud with respect to the removable module.