| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that it is difficult to open a door by utilizing the principle of leverage. <P>SOLUTION: For an inside/outside pressure difference dissolving device in a latch lock, a drive cam to be rotated by the operation force of operation means, a slide control body engaged with the drive cam at the rear end part and slid to either front side or rear wall side of a lock box of the latch lock opposing the energizing force by energizing means for energizing in a prescribed direction by the drive force of the drive cam, and a swing type pressurizing body connected at the inner end to the distal end of the slide control body through connection means, pivoted through a vertical shaft, and provided with an engaging distal end projected at all times from the front on the distal end side, are respectively incorporated in the lock box. When opening the door, when the engaging distal end of the swing type pressurizing body is brought into press contact with an abutting part on a door frame side through the drive cam operated by the operation force of the operation means and the slide control body, reaction based on the pressure contact force acts in the direction of opening the door itself. <P>COPYRIGHT: (C)2012,JPO&INPIT |
