| 摘要 |
A cord winder includes a base, a rotating disc, a spiral spring, a cord, a cord positioning element, a push button, and a top cover. When a first end part of the cord is pulled, the rotating disc and the cord positioning element are rotated in a first direction, and two protruding blocks of the push button are moved along an inner surface of the cord positioning element. When the first end part of the cord is no longer pulled, the two protruding blocks are respectively contacted with two notches of the inner surface of the cord positioning element. Consequently, the rotating disc and the cord positioning element are not rotated. When the push button is pressed down, the rotating disc and the cord positioning element are rotated in a second direction in response to a restoring force of the spiral spring. Consequently, the cord is retracted back. |
| 主权项 |
1. A cord winder, comprising:
a base comprising a protruding post; a rotating disc disposed on said base, and comprising a perforation and a fixing recess communicated with each other, wherein said protruding post is penetrated through said rotating disc; a spiral spring disposed on said rotating disc, and wound around said protruding post, wherein an inner end of said spiral spring is fixed on said protruding post, and an outer end of said spiral spring is fixed on said rotating disc; a cord sequentially wound on a first surface of said rotating disc, penetrated through said perforation, fixed in said fixing recess, and wound on a second surface of said rotating disc, wherein a first end part of said cord is exposed outside said base, and a second end part of said cord is fixed on a sidewall of said base and exposed outside said base; a cord positioning element connected with said rotating disc, wherein two notches are formed in an inner surface of said cord positioning element; a push button comprising a pressing part and two protruding blocks, wherein said two protruding blocks are in contact with said inner surface of said cord positioning element for limiting rotation of said cord positioning element; a position-restoring element arranged between said push button and said base for providing a restoring force to said push button; a top cover connected with said base, and comprising a hollow portion, wherein said hollow portion is formed in a top surface of said top cover, wherein said pressing part of said push button is inserted into said hollow portion, and said push button is not rotated relative to said top cover; a covering plate fixed on said rotating disc for preventing said cord and said spiral spring from being detached from said rotating disc, wherein said protruding post is penetrated through said covering plate and said cord positioning element is fixed on said covering plate; and a position-limiting mechanism connected with said protruding post of said base and located near said covering plate for preventing said covering plate and said rotating disc from being detached from said protruding post of said base, wherein said position-restoring element is arranged between said position-limiting mechanism and said push button, wherein when said first end part of said cord is pulled away from said base, said rotating disc and said cord positioning element are rotated in a first direction, and said two protruding blocks of said push button are moved along said inner surface of said cord positioning element, wherein when said first end part of said cord is no longer pulled, said two protruding blocks are respectively contacted with said two notches, so that said rotating disc and said cord positioning element are not rotated, wherein when said push button is pressed down, said two protruding blocks are separated from said inner surface of said cord positioning element, and said rotating disc and said cord positioning element are rotated in a second direction by said spiral spring, so that said cord is retracted back. |
