Replicating human body movements in sex dolls involves complex engineering and material science. Most advanced dolls feature internal skeletons made of metal or high-strength plastics, providing structural support and articulation. These skeletons are equipped with joints—ball-and-socket, hinge, or rotary—that enable movement of limbs, neck, and hips, allowing users to pose the doll naturally.
To achieve realistic movement, actuators such as motors or pneumatic systems are often incorporated, controlled via embedded microcontrollers. These components facilitate controlled, smooth motions, mimicking muscle movements and joint flexibility. Some high-end dolls feature motorized or servo-driven mechanisms that can simulate breathing, head turns, or limb adjustments, enhancing realism.
Surface materials like silicone and TPE are designed to deform naturally under pressure, mimicking human skin’s elasticity. These materials are often reinforced with internal structures to prevent tearing or stretching. Advanced models also incorporate sensors to respond to touch or movement, adding an interactive dimension.
Overall, the combination of articulated internal skeletons, responsive surface materials, and sometimes motorized actuation allows sex dolls to mimic human body movements convincingly. Continuous innovations aim to improve fluidity, range of motion, and responsiveness, making these dolls increasingly lifelike.