The ballpoint pen presses the refill to extend and lock, and press the refill again to retract into the pen holder. It is simple and practical. Static friction makes an object move.
Structural composition: The components of the automatic telescopic locking mechanism of the ballpoint pen include: locking parts, pressure rods, and guide rails, as shown in the following figure:
The upper and lower tooth columns of the automatic ballpoint pen (for the time being), the upper tooth column is pressed by hand, and the lower tooth column is the one that can be rotated inside. The meshing of the upper and lower tooth columns is incomplete, only the tip of the tooth is partially engaged, and the guide ribs behind the two engaged teeth are designed to slide in the same guide groove, and the lower tooth column is pushed down by the upper tooth column. After the groove, due to the action of the spring, the teeth of the lower tooth column will slide along the inclined surface of the teeth of the meshing upper tooth column, so that under the action of the inclined surface, the lower tooth column will turn an angle and slide to the other side. , it is pressed down, and this repetition can realize the function of the ballpoint pen. I don’t know if the expression is clear or not. It’s best to observe the ballpoint pen carefully to confirm my statement.
