ONE-WAY RESISTANCE ROLL-UP APPARATUS

摘要

A roll-up apparatus, which provides a unidirectional resistance, includes an outer barrel, an inner barrel, damping oil, a clutch device, and a driving device. The outer and the inner barrels each has a concentric-circle structure therein. The inner barrel has first ratchet teeth. The outer barrel is fitted to the inner barrel, and the concentric-circle structures are engaged. The damping oil is received in a space between the concentric-circle structures. The clutch device has second ratchet teeth to disengage and engage the first ratchet teeth of the inner barrel when the clutch device is moved to a first position and a second position. The driving device moves the clutch device between the first position and the second position.

主权项

1. A roll-up apparatus, comprising:
an outer barrel having an open end and a closed end at opposite sides, and having a first concentric-circle structure therein; an inner barrel having an open end and a closed end at opposite sides, and having a second concentric-circle structure therein and first ratchet teeth on the closed end; wherein the outer barrel is fitted to the inner barrel to engage the first concentric-circle structure with the second concentric-circle structure; damping oil received in a space between the first concentric-circle structure and the second concentric-circle structure; a clutch device having second ratchet teeth; a driving device for moving the clutch device between a first and a second position, wherein the second ratchet teeth of the clutch device is disengaged with the first ratchet teeth of the inner barrel when the clutch device is moved to the first position, and the second ratchet teeth of the clutch device is engaged with the first ratchet teeth of the inner barrel when the clutch device is moved to the second position.