| 摘要 |
It is required for a door to attach a door key assembly for the sake of caution and locking. The door key assembly to be attached to a door opposed to a door frame comprises a key body secured to an end face of the door and provided with a dead bolt and a fixing plate secured inside the door frame so as to oppose to the end face of the door. The fixing plate is provided with a vertically elongated recess having an opening facing the end face of the door and having a narrow portion and a groove formed on one side of the narrow portion. The recess and the groove are arranged vertically side by side so as to communicate with each other through a vertically elongated window portion. The key assembly further comprises a door opening angle limiting arm having one end engageable with the dead bolt and another end attached to the fixing plate, a slide pin disposed in the groove of the fixing plate to be vertically slidable in association with the movement of the door opening angle limiting arm, and a spring disposed in the groove of the fixing plate so as to urge the slide pin upward.
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