this invention the auxiliary locking mechanism which locks the body and lid approximately half way open prevents inadvertent spil1ing of articles contained in the case due to complete opening of the lid when the locking mechanism or the case is released further locking mechanism 5 on both sides of the case is released by one button as shown allowing the lid to be opened by one hand for ease of operation another embodiment of auxiliary locking mechanism is shown in fig5 through 7 in which body 22 and lid 23 are connected by a hinge 21 and an auxiliary locking mechanism 24 as shown in fig5 and 6 the auxiliary locking mechanism 24 is comprised of a case 25 attached to body 22 a first link 27 rotatably supported at one end in case 25 by a pin 26 a second link 30 rotatably connected to the lid 23 by pin 28 at one end and connected to the first link 27 by a pin 29 at the other end and a ball 31 locking part retained in the case 25 at the engaging end 27a of first link 27 as shown in fig5 the ball 31 moves to the position shown by the dotted line when the case is in a vertical position as shown in fig7 engaging the end 27a of link 27 preventing rotation and holding lid 23 in a partially opened positioned on the.