Tkinter :有没有办法不用tab键插入凸起的框架后面的小部件？

import tkinter as tk

root = tk.Tk()

frame = tk.Frame(root, relief="raised", borderwidth=2)
frame.pack()

button = tk.Button(frame, text="Button")
button.pack()

# 设置焦点到按钮上
button.focus_set()

root.mainloop()

import tkinter as tk

def insert_widget(event):
    # 在框架后面插入小部件
    button = tk.Button(root, text="Button")
    button.pack()

root = tk.Tk()

frame = tk.Frame(root, relief="raised", borderwidth=2)
frame.pack()

# 绑定回车键事件
frame.bind("<Return>", insert_widget)

root.mainloop()