Child-resistant zipper and packaging bag incorporating said zipper

A zipper packaging bag provided with a zipper unit comprising a pair of adhesion band members adhered to inner opposing side surfaces of an opening of the packaging bag, and a fit-engagement body configured to releasably engage opposing surfaces of the adhesion band members,

• wherein the fit engagement body comprises a sealing zipper which releasably engages the inner side surfaces of the opening in a sealed state which is released with the opening operation of the opening of the packaging bag;
• and a locking zipper comprising a first fit-engagement portion with at least one fit-engagement protrusion, and a second fit-engagement portion with at least one fit-engagement recess, wherein the first and second fit-engagement portions are on opposing surfaces of the fit engagement body and the fit-engagement protrusion and recess are adapted to releasably engage the first and second fit-engagement portions in a locked state, the locking zipper also comprising releasing cutout portions provided in the fit-engagement body, wherein engagement of the fit-engaging protrusion and recess is released from the releasing cutout portion,
• wherein releasing cutout portions are alternately provided along the first and second fit-engagement portions between the protrusions and recesses, respectively, and locked state of the locking zipper is released when engaged fit-engagement protrusions and the fit-engagement recesses are caused to slide oppositely toward the adjacent releasing cutout portion, and
• wherein the locking zipper is provided as the first zipper at the opening of the packaging bag, and the sealing zipper is provided as the second zipper accessible on release of the locking zipper.

A zipper packaging bag provided with a zipper unit comprising a pair of adhesion band members adhered to inner opposing side surfaces of an opening of a packaging bag, and a fit-engagement body configured to releasably engage opposing surfaces of the adhesion band members,

• wherein the fit engagement body comprises a sealing zipper which releasably engages the inner side surfaces of the opening in a sealed state and which is released with the opening operation of the opening of the packaging bag;
• and a locking zipper comprising a first fit-engagement portion with at least one fit-engagement protrusion, and a second fit-engagement portion with at least one fit-engagement recess, wherein the first and second fit-engagement portions are on opposing surfaces of the fit engagement body and the fit-engagement protrusion and recess are adapted to releasably engage the first and second fit-engagement portions in a locked state, the locking zipper also comprising a releasing cutout portion provided in the fit-engagement body, wherein engagement of the fit-engaging protrusion and recess is released from the releasing cutout portion,
• wherein the releasing cutout portion is provided at a longitudinal end portion of the fit-engagement body, and the locked state of the locking zipper is released by inserting a finger into the releasing cutout portion, and
• wherein the locking zipper is provided as the first zipper at the opening of the packaging bag, and the sealing zipper is provided as the second zipper accessible when the locking zipper is released.