Checked checkbox from controller

I have angular controller

$scope.event = {
  },
  type: {
    checked : false
  }
};

I use it like

<input id="show" name="type" type="checkbox" ng-model="event.type.checked">

When i page reload, my checkbox property checked disappear. How can i do condition, if event.type.checked == true, checkbox must be checked, else unchecked. Please, help