根据设定好的密码，采用二个按键实现密码的输入功能，当密码输入正确之后，锁就打开，如果输入的三次的密码不正确，就锁定按键3秒钟，同时发现报警声，直到没有按键按下3种后，才打开按键锁定功能；否则在3秒钟内仍有按键按下，就重新锁定按键3秒时间并报警。-Button 3 seconds, also found that alarm sound, press the button until the three kinds of not only after the Open button lock function　otherwise, there is still at 3 seconds press the button on the re-lock button 3 second time and alarm