| 摘要 |
PURPOSE: A shoestring fastener is provided to push a movement sawtooth unit in one direction without a spring. CONSTITUTION: A shoestring fastener comprises a main body(100) and a movement sawtooth unit. In the main body, a front side(110) and a back side(120) face each other and a pair of sidewalls(130) face each other on both sides thereof. In the lower part of the main body, an inlet is formed so that a shoestring can enter the main body. In the upper part of the main body, an outlet is formed so that the shoestring can be withdrawn from the main body. The movement sawtooth unit is received into the main body, moves up and down, and includes a circular sawtooth and a connection rod. |
