Method for operating a sleep mode in a massage chair using progressive muscular relaxation and the massage chair capable of using the same

A method for operating a sleep mode of a massage chair comprising:

• a seat portion having a massage ball assembly provided therein;
• a backrest portion being pivotally fixed to one side of the seat portion and including shoulder fixing portions on both left and right sides;
• leg fixing portions being pivotally fixed to one side of the seat portion;
• a support frame holding the seat portion and including arm fixing portions positioned therein;
• and
• an operating portion,
• wherein the method comprises steps of:
• (a) applying a sleep massage signal through the operating portion;
• (b) sensing a neck position and moving the massage ball assembly to a height of the neck position and operating the same;
• (c) actuating shoulder airbags within the shoulder fixing portions;
• (d) actuating arm airbags in the arm fixing portions;
• (e) pivoting the backrest portion and the leg fixing portions to a predetermined sleep angle;
• (f) lowering and operating the massage ball assembly from a back position;
• (g) actuating and releasing pelvic airbags in the seat portion and leg airbags in the leg fixing portions;
• (h) releasing the arm airbags;
• and
• (i) releasing the shoulder airbags.