| 摘要 |
PROBLEM TO BE SOLVED: To provide a convenient device for warning omission in locking and confirmation on locking while going out, thereby avoiding a need to return home to check whether a door has been locked because of worry.SOLUTION: A lock confirmation device includes a thumb-turn side device and a key-side terminal, the thumb-turn side device capable of making wireless communication for exchanging information. The thumb-turn side device includes a circuit for detecting whether a lock is in a locked state or an unlocked state based on an angle of a thumb-turn knob, a timing circuit, a wireless communication circuit and the like, and conveys lock state data and date and time data to the key-side terminal through wireless communication when the lock state has changed. The key-side terminal includes a wireless communication circuit, a display circuit and the like, retains the latest data received from the thumb-turn side device and displays the lock state and the date and time of operation based on the data. A warning is issued to urge locking, when the key-side terminal leaves a wireless communication area or if the lock is unlocked when the key has been placed in a storage.SELECTED DRAWING: Figure 1 |
