Design Explana on: Trigger-Based Slider Mechanism
1. Working of the Mechanism
This mechanism is designed to convert a manual rota onal input into a controlled linear output.

Input Stage: The user pulls the handle of the Trigger Lever, which pivots around a fixed axis
created by the Axle Pin.

Transmission Stage: As the lever rotates, its lower curved profile makes contact with the rear
face of the Slider.

Output Stage: The rota onal force is transferred as a linear push, driving the Slider and the
a ached Slider Rod forward through the housing.
2. Technical Specifica ons
Below are the key dimensions used in the assembly to ensure proper fit and func on:
Component
Key Dimension
Purpose
Main Housing Internal Slot Width
Provides a guided path for the slider
Slider Rod
Length & Diameter
Determined by the required stroke length
Axle Pin
Housing Width + 2mm Secures the lever while allowing rota on
Spring
Free Length
Ensures the slider returns to the home posi on
3. Design Choices

Ergonomic Lever: The lever features an elongated handle for be er mechanical advantage,
making it easier to compress the spring.

Curved Contact Face: The lever’s contact point is curved to ensure a consistent tangent
rela onship with the slider, reducing fric on and ensuring a smooth stroke.

Integrated Rail System: The housing serves as both a structural frame and a guide rail,
ensuring the slider moves linearly without l ng.
4. Return Mechanism
The mechanism u lizes a Helical Compression Spring for automa c rese ng.

As the slider moves forward, it compresses the spring against the internal wall of the
housing.

When the trigger is released, the spring pushes the slider back to its original posi on.

This return force subsequently pushes the lever back to its star ng state.
5. Manufacturing Approach

Prototyping: Parts are op mized for 3D Prin ng (FDM) using PLA for func onal tes ng.

Mass Produc on: The design is compa ble with Injec on Molding, featuring standard dra
angles and uniform wall thicknesses.

Assembly: The axle pin and spring are off-the-shelf components to reduce custom machining
costs.