Why We Use Spring Tactors

Why We Use Spring Tactors

The Problem with Conventional Designs

In conventional vibrating glove designs, the vibration motor (buzzer) is typically mounted directly against the finger, separated only by a thin layer of glove material. While simple, this approach has limitations:

• The vibration sensation can feel weak or diffuse
• Much of the vibration energy is absorbed by the mounting rather than transmitted to the skin
• Direct mounting can cause discomfort during extended use

The Spring Tactor Solution

BlueBuzzah uses a spring-mounted tactor design that significantly improves vibration transmission to the fingertip:

How It Works

1. The buzzer (LRA) is mounted inside a 3D-printed housing
2. A small spring connects the buzzer to a contact pad
3. The contact pad presses against the fingertip through a hole in the glove
4. When the buzzer vibrates, the spring amplifies and focuses the vibration onto the contact point

Benefits

• Stronger perceived vibration at lower power levels
• More focused sensation at the fingertip
• Reduced motor wear due to efficient energy transfer
• Adjustable pressure based on glove fit

Tactor Components

Each tactor assembly consists of:

Component	Description
LRA Buzzer	Linear Resonant Actuator
Spring	Small compression spring
Housing	3D-printed tactor body
Contact Pad	Surface that touches the fingertip
Wiring	Connection to the PCB

Every glove uses five of these tactor assemblies, one per finger — index, middle, ring, pinky, and thumb.

Design Considerations

The spring tactor design was developed through extensive testing to optimize:

• Spring tension for comfortable but effective contact
• Housing geometry for reliable assembly
• Contact pad size for focused vibration
• Wire routing to prevent fatigue failures

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