| 摘要 |
A tension device includes a cylinder with a chamber therein. A plunger having a rubber shoe on the outer end thereof slides within the cylinder and is urged outwardly therefrom by a coil spring. A pinion is eccentrically mounted to engage with a longitudinal rack on the surface of the plunger and is urged by a clip spring to move the plunger into the cylinder. The force of the coil spring is greater than that of the clip spring to normally urge the plunger outwardly from the cylinder and the rack out of engagement with the pinion due to the eccentric mounting of the pinion.
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