Patent ID: 8122573

Claim:
A thin slider for a slide fastener comprising: a slider body in which front end portions of upper and lower blades are connected by a connecting post, a Y-shaped element guide passage is provided between the upper and lower blades and a tab attaching portion is disposed on each of the right and left side faces of the upper blade; a tab having an arm portion pivotably fixed to the right and left tab attaching portions and a tab main body formed integrally with the arm portion; a locking pawl which is journaled by the slider body; and a resilient member accommodated in the connecting post, wherein the locking pawl comprises a pawl lever portion which is extended backward from a journaling portion which serves as a rotation shaft and in which a pawl portion capable of being inserted into and pulled out of the element guide passage are provided projectingly at a rear end portion thereof; a first projecting piece disposed below the journaling portion; and a second projecting piece disposed above the journaling portion, the first projecting piece being urged in a first rotation direction for inserting the pawl portion into the element guide passage by the resilient member, wherein the upper blade is connected to the connecting post and comprises a first upper blade having a guide portion disposed on a top face thereof in a back and forth direction and a second upper blade which is attached slidably to the first upper blade along the guide portion, wherein the second upper blade comprises a second upper blade main body in a thin plate shape disposed on the top face of the first upper blade and an operating piece drooping from a front end portion of the second upper blade main body along the connecting post, wherein a first operating portion for pressing the first projecting piece in a second rotation direction for pulling the pawl portion out of the element guide passage when the second upper blade is slid backward is disposed on an inner face of the operating piece, and a second operating portion for pressing the second projecting piece in the second rotation direction when the second upper blade is slid forward is disposed on a side of a sliding face of the second upper blade main body and wherein the second upper blade main body is equal to or larger than the first upper blade.