Abstract: A zipper lock device for bags is provided, which has a function for locking and unlocking the slider of the zipper without exposing the lock mechanism to the outer appearance of the bags, aiming at improving the design and convenience. The zipper lock device is for locking a slider of a zipper provided on an opening edge of the bags, and comprises: a protrusion provided on a back side of the slider; and a lock unit provided inside the bags at a forward position of a closing direction of the zipper, for receiving the protrusion so as to lock the slider. The lock unit comprises: a lock mechanism for locking the slider by engaging with the protrusion; a drive unit for operating the lock mechanism; and an electronic circuit for receiving a wireless signal from outside of the bags and controlling the operation of the drive unit.

Abstract: Link plates are connected into a chain by means of forward and backward connecting pins in each chained link plate. Frictional blocks having slanting outer surfaces are mounted around the link plates and affixed thereto by the connecting pins projecting from the link plates into the frictional blocks. The blocks may have holding pins inserted above and below the connecting pins, whereby opposite parts of the frictional block are attached to one another, enclosing the projecting ends of the connecting pins. The opposite parts of the frictional blocks attached by the holding pins have slanting V-shaped outward-facing frictional transmittance faces, transverse to the chain run for riding in the circumferential V-groove of a pulley. The blocks also have slanting faces longitudinally along the chain run on the side of the chain to be oriented toward a pulley, and straight abutting faces on the side of the chain to be oriented away from the pulley.