Retractable Pens

Retractable pens are pens which have a spring-loaded ink cartridge which retracts and extends outside a protective housing. By clicking downward on the top of the pen, the tip is extended and locks in place at the bottom of the housing for use.

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Detailed Description for Retractable Pens

Retractable pens are pens which have a spring-loaded ink cartridge which retracts and extends outside a protective housing. By clicking downward on the top of the pen, the tip is extended and locks in place at the bottom of the housing for use. Pen clicking is repeated pressing of the button of a retractable pen which produces a clicking sound

How a retractable pen works:

A click pen has several parts to it: the frame, a thruster, two cams, a guide pin, a spring, an ink cartridge with ink, a ballpoint at the end of the cartridge, and other parts that may vary. The spring provides the tension required to retract the ink cartridge. The cams provide a bistable system where in one position the ink cartridge is retracted and in the other it is extended. When the button end of the pen is pressed, the system moves from one position to the other. The guide pin is typically molded into the frame of the pen.

 

      

 

 


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