Transmission device of massage chair

A transmission device of a massage chair comprising:

• a base and a massager;
• wherein the base includes a frame, two first ropes connected on two sides of a front end of the frame, and two second ropes connected on two sides of a rear end of the frame, wherein the two first ropes and the two second ropes are a steel cable;
• wherein the massager includes a first rotary shaft and a second rotary shaft which are rotatably connected on a front end and a rear end of the massager, the first rotary shaft includes two first rotatable wheels connected on two sides thereof, and a respective one first rotatable wheel has a first threaded section formed thereon, the respective one first rope is rolled on the first threaded section of the respective one first rotatable wheel, wherein the second rotary shaft includes two second rotatable wheels connected on two sides thereof, and a respective one second rotatable wheel has a second threaded section formed thereon, and the respective one second rope is rolled on the second threaded section of the respective one second rotatable wheel;
• wherein the massager includes a motor configured to drive the first rotary shaft or the second rotary shaft, a drive wheel is meshed with the respective one first rotatable wheel and the respective one second rotatable wheel so as to drive the respective one first rotatable wheel and the respective one second rotatable wheel to rotate in a same direction, wherein the respective one first rotatable wheel is configured to roll the first rope, and the respective one second rotatable wheel is configured to unroll the second rope, alternatively, the respective one first rotatable wheel is configured to unroll the first rope, and the respective one second rotatable wheel is configured to roll the second rope, such that the massager moves forward and backward reciprocately along an inner wall of the frame, and the massager includes a massage element configured to massage a user sit on the base.