Electronic Cigarette Case

What is this patent about?

’961 is related to the field of storage containers for electronic cigarettes, specifically focusing on the mechanical design of flip-top cases. Traditional cases often rely on manual operation or complex torsional springs that are prone to mechanical failure and can negatively impact the device's aesthetic profile. There is a need for a simplified, internal mechanism that provides a smooth, semi-automatic user experience without external clutter.

The underlying idea behind ’961 is to utilize a cam-like interaction between a spring-loaded plate and a curved protrusion on the lid to drive the opening and closing actions. By positioning a flexible spring piece within the body to exert constant pressure against an arc-shaped bulge on the cover, the system creates a mechanical tipping point. Once the user moves the lid past a specific threshold, the stored elastic energy is released to complete the motion automatically.

The claims of ’961 focus on an opening and closing mechanism comprising a spring piece housed within the box body and an arc-shaped bulge integrated into the box cover. The independent claim specifies that the bulge is clamped between the spring piece and the inner wall of the body. The geometry is designed such that rotating the cover to a first predetermined angle triggers the spring to push the bulge toward a fully open state, while rotating it to a second angle triggers a push toward the fully closed state.

In practice, the mechanism functions by shifting the moment of force relative to the hinge axis. When the case is closed, the contact point between the spring and the bulge resides below the hinge, creating a torque that holds the lid shut. As the user manually initiates the opening, the bulge slides along the spring until the contact point crosses above the hinge line. At this transition, the spring pressure flips the direction of the torque, driving the lid to its fully extended position.

This approach differs from prior art by eliminating the need for external buttons or visible torsional springs wrapped around the hinge pin. By using a horizontally mounted spring to bias a vertical spring piece, the invention achieves a bi-stable snap action using fewer, more robust components. The integration of a V-shaped hinge interface further constrains the lid's range of motion, ensuring the semi-automatic transition occurs reliably without exposing the internal mechanics to the user.