| 摘要 |
An enhanced structure for measuring tape, comprises a tape casing having a wheel disposed in its interior, a metal tape being wound around said wheel 11 and having a tail end fixedly connected to said wheel so as to generate elastic force to let said tape eject automatically from said tape casing when no braking force is applied; a press button pivotally connects to the top of said tape casing, said press button having a curved tooth face disposed at top of inner wall thereof, with said curved tooth face and a removable transmission element meshing with each other; and a driving element and a power receiving element mesh with each other and are disposed near said transmission element, wherein said power receiving element links with said wheel; a user can use one hand to eject the tape, when he/she wants to retract the tape, he/she can press said press button with the hand that holds the measuring tape to let said curved tooth face inside said press button to rotate downward for an angle, and then to drive said transmission element to move down a length to let said transmission element mesh with said driving element, thus causing said transmission element to receive power from said driving element and to drive said power receiving element to rotate for an angle, so as to drive said wheel to turn reversely to retract a length of said tape, when said press button is not being pressed, an elastic force of said retracting element returns said press button to an original position to let said transmission element break away from said driving element. By repeating the above steps, said tape is retracted to said tape casing, while all operations are done with one hand.
|
