| 摘要 |
A double ratchet structure includes a base, a first directional member, a second directional member, two resetting members, a choosing member, a driving member and a pivoting member. The first and second directional members are pivotally disposed on the base, the first directional member pivots oppositely to the second directional member. The resetting members are respectively disposed between the first or the second directional member and the base for protruding the first or the second directional member from the base. The choosing member is coaxially and pivotally disposed on the base and covers the first and the second directional members. The choosing member catches the first or the second to pivot toward the base. The driving member is coaxially and pivotally disposed on the base through the pivoting member for engaging with the first or the second directional member. |
| 主权项 |
1. A double ratchet structure comprising:
a base; a first directional member having a first pivot portion and a first claw, wherein the first claw is pivotally connected to the base via the first pivot portion; a second directional member having a second pivot portion and a second claw, wherein the second claw is pivotally connected to the base via the second pivot portion, and the second claw pivots oppositely to the first claw; two resetting members, wherein one of the resetting members is against and disposed between the first directional member and the base for protruding the first claw from the base, and the other resetting members is against and disposed between the second directional member and the base for protruding the second claw from the base; a choosing member coaxially and pivotally disposed on the base and covering the first directional member and the second directional member, the choosing member having a detent portion, wherein the detent portion is for catching the first claw or the second claw, and the catched first claw or the catched second claw is pivoted toward the base; a driving member coaxially disposed on the base and rotatably covering an outside of the first directional member and an outside of the second directional member, the driving member having an inner jaw portion for engaging with the first claw or the second claw; and a pivoting member coaxially disposed to the driving member and coaxially and pivotally disposed on the base, wherein the driving member is coaxially and pivotally disposed on the base via the pivoting member. |
