Slide fastener
AssigneeYKK Corporation
InventorYuichi Iwase
Life of this patent
Estimating the term…
Abstract
A slide fastener with a slider locking mechanism comprising a slider body, a tab attached to the slider body rotatably, and a slider having a locking pawl formed integrally with the tab, wherein the locking pawl has a pawl portion fitted into between the elements, and the pawl portion comprises: a first contact surface which, when the tab is rotated after sliding operation of the slider is ended, contacts with a first element of an element row attached to a fastener stringer to stop the tab's rotation temporarily; and a second contact surface which, when the slider starts a forced movement in an element separating direction with the tab's rotation stopped, contacts with a second element to stop the slider's forced movement in a state where the tab restarts to rotate and the pawl portion is fitted into between the elements.
Claims12
A slide fastener with a slider locking mechanism having a pair of right and left fastener stringers in which element rows are attached to opposing tape side edge portions of a pair of fastener tapes and a slider, through which the element rows are inserted, the slider comprising a slider body in which element guide passages are formed between an upper blade having at least one window portion and a lower blade;
- a tab attached rotatably to a top face side of the upper blade;
- at least one locking pawl which is formed integrally on the tab and projected into the element guide passages through the at least one window portion in the upper blade to be capable of fitting into between elements constituting the element row, and locking means for stopping a rotation of the tab toward a rear mouth side of the slider at a rotation limit of the tab,
- the locking pawl having at least one pawl portion to fit into between the elements, wherein
- a first contact surface configured for contacting a first element of the element rows is formed on a front face of the at least one pawl portion, and a second contact surface configured for contacting a second element of the element rows adjoining the first element in a rear side direction is formed on a rear face of the at least one pawl portion, the rear face being on a side of the at least one pawl portion that is opposite to the first contact surface;
- the first contact surface comes into contact with the first element of the element rows so as to temporarily stop a free rotation of the tab under a weight of the tab toward a rear mouth side of the slider;
- a second contact surface comes into contact with the second element of the element rows so as to stop a forced movement of the slider when the pawl portion is fitted between the first and second elements, and
- the locking means is configured to stop the free rotation of the tab at its rotation limit and the forced movement of the slider when the forced movement of the slider occurs while the second element remains in contact with the second contact surface.
Dependencies are inferred from the claim text.