Toothbrush Structure Capable of Expanding Cleaning Depth

A toothbrush structure comprising:

• a body, a movable brush, and a protective unit;
• the body including a handle, a connecting neck, and a fixed head, wherein the handle is connected with the connecting neck and is configured to be gripped by a user;
• the connecting neck is connected with the handle and the fixed head, the fixed head has multiple first orifices for receiving multiple first bristles, and a slot is formed on a middle portion of the fixed head and extends to the handle;
• wherein the movable brush is accommodated and slides in the slot linearly, and the movable brush includes a push block, a slidable post, and a movable brushing portion, wherein the push block is disposed on a top of a first end of the slidable post, the movable brushing portion is mounted on a second end of the slidable post opposite to the push block, and the movable brushing portion has multiple second orifices for receiving multiple second bristles, the slidable post is received in the slot to slide the movable brushing portion in the slot;
• and
• wherein the protective unit is configured to cover the slot so that the movable brush is limited to slide in the slot.