What is a medical device?
A medical device is a general term for machinery and instruments used for the diagnosis, treatment, prevention of disease, or to affect the structure or functions of the human body. Its scope ranges widely from small instruments like scalpels and scissors to advanced equipment such as ventilators, dialysis machines, X-ray CT scanners, MRI machines, and even medical robots designed for surgical assistance or rehabilitation support. Additionally, items used daily in life such as contact lenses, hearing aids, thermometers, blood pressure monitors, eyeglasses, and massage devices are also classified as medical devices. However, some of these items may not be included in the definition of medical devices depending on the country or region. To ensure the quality, effectiveness, and safety of medical devices, regulatory authorities in each country oversee them. For example, in the United States, the FDA (Food and Drug Administration) plays a central role in this regard.
Gears for medical devices
Gears are essential mechanical components in the design and manufacture of medical devices, widely used in everything from large equipment and medical robots to small, mass-produced diagnostic instruments. Their functions are diverse, including rotational power transmission, directional conversion, generation of linear motion, and torque amplification. Representative types include worm gears, spur gears, and rack-and-pinion systems. The medical field demands high precision and stable operation, often necessitating the use of high-precision gears achieved through grinding. Materials for these gears frequently include carbon steel for machine structural use, alongside stainless steel chosen for its superior corrosion resistance. KHK Gears also provides gear solutions meeting the stringent requirements of medical devices through its diverse product lineup.