Retractable pen

Retractable pens are a type of ink pen 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.

The Frawley Pen Company, founded in 1949 by Patrick J. Frawley, claims to have made the “first pen with a retractable ballpoint tip” in 1950.

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.

Pen clicking is repeated pressing of the button of a retractable pen which produces a clicking sound. In its normal use, the button is only pressed when someone wants the nib of the pen to be exposed so they can write with it. This makes a noise, which varies in tone, dynamic and timbre depending on the size and make of the pen. When the noise is heard repeatedly it can have a psychological effect on the doer or anyone in the vicinity. The action can either be a conscious or a subconscious action. It is often associated with boredom, inattentiveness thinking, hiding something, or nervousness. Pen clicking is one type of harassment that can be done while on foot. Clicking pens is one of the physical symptoms of OCD. It has been described as a nervous habit a form of fidgeting. It can also be described as a “distracting activity that releases nervous energy”. Some people find it hard to concentrate when others are pen-clicking, and so the action can often be thought of as a pet peeve. Clicking a pen can be a type of autistic stimming behavior, but it is unique in that “a person can do in public without drawing much attention to themselves,” as opposed to some others which are not socially acceptable.

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