Robot arm

A robot arm comprising:

• a motor portion;
• a support connected to the motor portion;
• first and second links connected to the motor portion and movable in a vertical direction;
• a first gimbal coupled to upper ends of the first and second links, respectively;
• third and fourth links, upper ends of which are respectively and directly coupled to the first gimbal;
• fifth and sixth links coupled to lower ends of the third and fourth links, respectively;
• seventh and eighth links coupled to central areas of the fifth and sixth links in the vertical direction;
• a second gimbal coupled to upper ends of the seventh and eighth links;
• ninth and tenth links, upper ends of which are respectively and directly coupled to the second gimbal;
• eleventh and twelfth links coupled to lower ends of the ninth and tenth links;
• and
• a top portion coupled to upper ends of the fifth and sixth links and upper ends of the eleventh and twelfth links;
• and
• a first wire, wherein one end of the first wire is coupled to an upper area of the second link, and another end of the first wire is coup ed to the motor portion,
• the first wire sequentially passes through the twelfth link, the top portion, and the fifth link while going from the one end to the another end of the first wire.