Gear-Driven Pattern Maker with Cam Oscillation

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Solution Overview

Problem

Existing methods for creating patterns on substrates are labor-intensive and lack uniformity, as they rely on manual drawing with markers or writing instruments.

Innovation Solution

A drawing device with a gear assembly and cam mechanism that rotates to intermittently engage a cam follower, causing a marker carriage to pivot and move laterally, creating predetermined patterns on a substrate when pushed over it.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual drawing with markers or writing instruments is used to create patterns, then the process is simple and requires minimal equipment, but the process is labor-intensive and lacks uniformity

Engineering Contradiction:
Improvepattern uniformityVSAvoidpattern creation efficiency
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The device allows a single user to operate the entire pattern-making system by themselves. The user simply pushes the device forward, and the internal mechanical components (wheels, gear assemblies, cams, and arms) automatically execute the complex lateral movements of the marker carriage without requiring manual intervention for each movement phase.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The device employs dynamic mechanical components including rotating wheels, gear assemblies, and cams that convert the simple forward pushing motion into complex lateral movements. The cam mechanism specifically creates the oscillating motion of the arms that guide the marker carriage side-to-side, transforming uniform linear input motion into varied output motion patterns.

Inventive Principle:
Principle #15Dynamics

2Productivity

If a mechanical drawing device with gear assembly and cam mechanism is used, then pattern uniformity and efficiency are improved, but the device complexity increases

Engineering Contradiction:
Improvepattern creation efficiencyVSAvoidmechanical structure complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The device is divided into distinct functional modules: wheel assemblies for movement, gear assemblies for motion transmission, cam mechanisms for oscillation generation, and marker carriages for drawing execution. Each module performs a specific function and can be independently analyzed or adjusted, making the complex system manageable through functional segmentation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mechanical components serve multiple functions: the wheels provide both movement and rotational motion, the gear assemblies transmit and modify motion while also providing mechanical advantage, and the cam mechanism generates oscillating motion that controls the marker carriage. This multi-functionality reduces the need for separate dedicated components for each function.

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

Data Source

PatentUS11975563B2Pattern maker
Publication Date: 2024.05.07 CRAYOLA LLC
  • US11975563B2 patent drawing
  • US11975563B2 patent drawing
  • US11975563B2 patent drawing

AI summary

The present disclosure relates to a drawing device for creating a pattern, wherein the drawing device comprises a gear assembly that rotates upon movement of the device, the gear assembly being operatively coupled to a cam and a cam follower, such that rotation of the gear assembly rotates the cam and causes the cam to bear against the cam follower. Movement of the cam follower thereby causes lateral movement of a marker carriage housing at least one writing instrument.