| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a latch device with door opening auxiliary mechanism with a simple structure capable of smoothly opening a door by eliminating an atmospheric pressure difference between the indoors and the outdoors. <P>SOLUTION: An inverted latch mechanism and a door opening auxiliary rod 13 are installed in a lock box, and the door opening auxiliary rod 13 is guided to be movable in the longitudinal direction vertical to a front plate 14 in the lock box and the front end constituting an inclined plane 15 is made to face a vertical roller 17 installed on a door frame 16 side to engage with the roller 17. When a door is opened, the door opening auxiliary rod 13 is pushed in the direction of the roller 17 through a compression coil spring 19 by a cam body rotating with a handlebar and a knob, and a door D is opened a little by the wedge action generated between the inclined plane 15 and the roller 17. <P>COPYRIGHT: (C)2012,JPO&INPIT |
