Slider for slide fastener

A slider for a slide fastener wherein a tab attaching rod retaining a tab is integrally formed in a cantilevered state on an upper surface of an upper blade of a slider body having the upper blade and lower blade,

• the tab attaching rod has a fixed end portion which rises from the upper blade, and a free end portion which provides an insertion gap capable of receiving a part of the tab with respect to the upper blade,
• a blocking member blocking the insertion gap when arranged in the slider body,
• the slider body has a mounting portion for mounting a part of the blocking member,
• the mounting portion includes a concave groove on the upper surface of the upper blade,
• the concave groove is provided across the insertion gap from the free end portion of the tab attaching rod,
• the concave groove includes a bottom surface which is lower than the upper surface of the upper blade, a pair of right and left side surfaces which rise from the bottom surface and face each other, and a front surface which rises from the bottom surface and is formed between the right and left side surfaces, and
• the concave groove extends from a rear end of the upper blade toward a front end of the upper blade,
• wherein when the blocking member is mounted to the concave groove the blocking member is firmly fixed,
• wherein the slider is provided with an occlusion retaining structure which retains a blocked state of the insertion gap when the blocking member is firmly fixed,
• wherein the tab attaching rod has a fixing portion which engages at least a part of the blocking member when the blocking member is mounted to the concave groove so as to fix the blocking member with respect to the free end portion,
• the blocking member has a main body portion which is mounted to the mounting portion, a resilient piece portion which is configured to be resiliently deformable in an up and down direction, and an engaging and disengaging portion which is arranged in the resilient piece portion and is capable of engaging with and disengaging from the fixing portion,
• wherein the occlusion retaining structure includes the engaging and disengaging portion and the fixing portion,
• wherein the fixing portion is constructed by a step portion which is arranged in the free end portion,
• the resilient piece portion is arranged in such a manner that a part of the resilient piece portion is in contact with or close to the free end portion of the tab attaching rod when the block member is firmly fixed,
• the engaging and disengaging portion includes a protruding portion which protrudes from an upper surface of the resilient piece portion, and
• wherein an upper end of the protruding portion is movable to a height position of a lower end of the step portion.