To provide a door lock suitable for use as a door lock provided with a display lock or a partition lock, having a simple structure, being easily and inexpensively manufactured, and capable of preventing a door from being locked if a thumb-turn knob is locked and operated by mischief or the like and the door is closed, ensuring the use of an indoor space to cope with the mischief, allowing the use of the display lock and the partition lock in common inexpensively and rationally, and improving its appearance.
This door lock is provided with a lever cam 56 capable of moving simultaneously with the rotational displacement of lever handles 6, 39, a latch bolt 4 capable of advancing and retracting in linkage with the lever cam 56, and a rock cam 57 capable of moving simultaneously with the rotational displacement of the thumb-turn knob 96 to prevent the latch bolt 4 from being retracted and displaced through the locking and rotational displacement of the rock cam 57. One end of the lever cam 56 is arranged to engage with the locking and rotating region of the rock cam 57.
| JP4572201 | Locking device |
| JPS5838118 | [Title of the device] Cylinder lock for construction |
NAKAGAWA YOSHINORI
TAKAHASHI KOICHI
TAKAHASHI KOICHI
| JPH0658030A | 1994-03-01 |
Next Patent: NOZZLE DEVICE AND SANITARY WASHING DEVICE USING THE SAME