| 摘要 |
<p>Today the door locks on the entrance doors are used to provide security, to open and close the door. The latch mechanism of these door locks on the entrance door is used to effectively open and close the door and does not provide security if it is used solely without dead bolt, in that case intruders can enter the house by using simple method. With this invention, the dead bolt does not have to be used to prevent intruders to enter. Without changing the door opening-closing habits of people, changing the known shape of the latch and its function how it works, enables the door lock to be used only by people who are permitted to use it. In addition it provides safety to the door even when the dead bolt is not used.</p> |
