| 摘要 |
PURPOSE:To prevent the flap to a bag from being carelessly opened by a method wherein, a lock fitting utilizing a permanent magnet in order to engage the flap of a bag with a tongue, the hole of the female part is formed into long and narrow shape in the direction crossing at right angle with the opening and closing direction of the flap of the bag, and at the same time, the monitor diameter of the female part hole and the diameter of the protruded stem of the male part are formed almost in coincidence with each other. CONSTITUTION:As the hole 4a of the case 4 in a female part A is formed in a long and narrow shape in the direction crossing at right angle with the opening and closing direction of the flap c' of the bag, a protruded stem 3a can be inserted very easily into the hole 4a by inserting it from the longitudinal direction of the hole 4a. Pertaining to the pulling out of the protruded stem 3a, if the side end of the tongue c'' of the bag is lifted up, the attraction between the tongue c'' and a ferromagnetic member is removed by the lever-like movement in the direction having a margin between the tongue c'' and the hole 4a, and the protruded stem 3a can be pulled out easily. The hole 4a is formed narrow in width in the opening and closing direction of the flap c' of the hole 4a, and as the minor diameter D and the diameter d on one side of the protruded stem 3a are almost in coincidence with each other, the protruded stem 3a can not perform the lever-like movement and it does not come off even when the engagement of the lock fitting is going to be removed by lifting the lower end of the tongue c''. |
