| 摘要 |
A power operated tape measure enables measuring tape extension through a drive mechanism, as well as measuring tape retraction. A tape cartridge assembly including an annular reel, a measuring tape wound onto the reel, as well as a spring coupled with the reel, and is positioned within a housing shell of the tape measure. A drive mechanism accomplishes tape extension out of the housing shell, and optionally, tape retraction into the housing shell by engaging with a surface of the measuring tape. A primary actuator initiates input on one or more switches that selectively control operation of the drive mechanism, and includes a lever arm for a user to make selections regarding tape extension and retraction. A retraction actuator is moveable by a user to cause the drive mechanism to become disengaged from the surface of the tape, whereby spring powered retraction of the tape is permitted.
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