Hold N Drive: A Dual Mode Mechanical Desk Product

Project Overview

Hold N Drive is a dual purpose mechanical desk accessory designed to function both as a stable pen holder and as a rolling toy. The product incorporates a simple mechanical transformation that allows the wheels to retract or deploy depending on user interaction, balancing playful engagement with everyday usability.

Final product package design.

Design Requirements & Constraints

Create a compact desk product with two distinct functional states.
Ensure stability during use as a stationery holder.
Introduce a controlled mechanical transformation triggered by user input.
Design components suitable for repeatable manufacture and assembly.
Maintain durability and ease of use.

Mechanical Design & CAD Development

The product was designed around a dual mode mechanism in which the wheels remain retracted during normal desk use. A removable fuel shaped insert engages an internal linkage that deploys the wheels outward, transforming the product into a rolling object. The mechanism was modelled in CAD to control wheel travel, alignment, and clearance, ensuring smooth motion without compromising stability.

CAD models showing internal geometry and load-bearing design.

Prototyping & Iteration

Physical prototypes were produced and assembled to validate the mechanical behaviour. Testing focused on wheel deployment consistency, friction, and the repeatability of the transformation. Iterative refinements were made to improve motion reliability and ensure the product returned to a stable configuration when the insert was removed.

Segmented components being loaded - planned for transport and assembly.

Outcome & Learning

The final prototype successfully demonstrated a reliable dual mode function, combining everyday utility with mechanical interaction. The project strengthened practical skills in mechanism design, tolerance awareness, and translating CAD intent into a functional physical product.

Images of the structure during live performance.