Massage device

A massage device comprising:

• a base including a first positioning plate, a second positioning plate, and a pair of notches formed at upper and lower ends of the base,
• a drive unit including a main seat, an engaging recess arranged at a bottom of the main seat, a drive member provided on the main seat, a rotary shaft penetrating the drive member, a pair of massage members each rotatably mounted on a respective end of the rotary shaft in an eccentric manner, massage bodies ends mounted on opposed ends of each massage member, and a unidirectional bearing and a first bevel gear mounted on one end of the rotary shaft, and
• a transmission unit including two positioning blocks, a worm shaft connected between the two positioning blocks and formed with a cross screw thread thereon, a second bevel gear mounted on the worm shaft, a movable member mounted on the worm shaft and including a linkage member, an accommodation groove defined between the second bevel gear and the movable member, a fixed seat and an upper cover connected to the accommodation groove, the fixed seat being secured on the main seat, the first bevel gear meshing with the second bevel gear, and the linkage member being engaged with the cross screw thread,
• wherein the linkage member is biased by a spring, and
• wherein the spring abuts against a positioning piece fixed to the movable member with a screw.