HarmonyOS @Builder函数接收的状态变量未引起内部ui变化

ChangePinPage界面唤起了自定义键盘，在自定义键盘的按钮组件中修改了currentKeyboardType键盘类型来切换中英文键盘，但是CustomKeyboard.ets中Text(${$$.currentKeyboardType})的值并未变化。

//xxxModel.ets
export class Tmp {
  inputController: TextInputController;
  currentKeyboardType: number;
  constructor(inputController: TextInputController, currentKeyboardType: number) {
    this.inputController = inputController;
    this.currentKeyboardType = currentKeyboardType
  }
}
# ChangePinPage.ets:
@Provide currentKeyboardType: number = Const.KEYBOARD_TYPE_NUMBER; 
...
TextInput()
.customKeyboard(KeyBoardWindow(new Tmp(this.oldPinController, this.currentKeyboardType)))
# CustomKeyboard.ets:
@Builder
export function KeyBoardWindow($$: Tmp) {
  Column() {
    Row() {
      Image($r("app.media.ic_keyboard_down"))// 标题行的”收起“图标
        .onClick(() => {
          $$.inputController.stopEditing()
        })
      Text(`${$$.currentKeyboardType}`)
   }
}
// xxxChild.ets ...
@Consume currentKeyboardType: number;
...
this.currentKeyboardType = 2;