Lockable slider for slide fasteners

A lockable slider for a slide fastener including a pair of interengaging element rows to be coupled and uncoupled by the lockable slider, said lockable slider comprising:

• (a) a slider body including an upper wing and a lower wing joined at one end of the slider body by a connecting neck so as to define therebetween a generally Y-shaped guide channel;
• a pair of confronting walls and a substantially C-shaped wall provided on the upper surface of the upper wing and separated from each other longitudinally of the slider body, the C-shaped wall being open toward the confronting walls, the confronting walls and the opposed side walls of the C-shaped wall being arranged substantially in parallel to each other, the upper wing having a through aperture formed therethrough to communicate with the Y-shaped guide channel and positioned in a region defined by the C-shaped wall and the confronting walls but partly deviated from the region;
• (b) a pull tab having a axle provided on its one end;
• (c) an attachment cover attached to respective upper sides of the confronting walls and the C-shaped wall with the axle of the pull tab arranged between the confronting walls;
• and the C-shaped wall;
• and
• (d) a locking key including a lock bar, a grip lever provided at one end thereof so as to extend radially outwardly therefrom and a locking prong provided at an intermediate position thereof so as to extend radially outwardly therefrom and substantially normally to the grip lever;
• the locking key being disposed within the C-shaped wall and between the confronting walls with the locking bar deviated relative to the longitudinal axis of the slider body toward the through aperture, the locking key being rotatable on its own axis between a first position in which to bring the locking prong through the aperture into the guide channel and a second position in which to retract the locking prong through the aperture from the guide channel.