While the button itself is not a primary safety device, it contributes indirectly to seatbelt usability. Safety experts have long recognized that convenience plays an important role in encouraging proper seatbelt use.
When a seatbelt is easy to locate and fasten, people are more likely to wear it correctly. Even small frustrations can discourage proper use over time.
The stopper button helps ensure that the latch remains positioned where users expect to find it. This consistency can make a difference, particularly for children, elderly passengers, or individuals with limited mobility.
Automotive designers often focus on small details that most people never notice. Yet these details collectively contribute to a smoother and safer driving experience.