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String pinching and release mechanism in market ?

Externet
in Engineering

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Hi.

Trying to find if there is in the market a mechanism that holds a string under pulling force by pinching and releases it by a solenoid or lever.

Or an off the shelf device/gadget that can be re-purposed.

String wound  ------------------------pinching mechanism------------------------>20 Newton pulling force
in a bobbin                           ^release solenoid^

Have you seen such in everyday items ? Sort of clothesline extender, window blind or something alike... Just trying to reuse instead of re-invent/design. If possible plastic, or non-corroding. Not self-rewinding as a measuring tape.

that holds a string under pulling force by pinching and releases it by a solenoid or lever.

 

There is look at the 3 minute mark.

 

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