Entertainment button device and game machine

An entertainment button device comprising:

• an entertainment button that a player can push;
• and
• a button-up-and-down mechanism configured to move the entertainment button up and down from a predetermined normal operation position to a protruding position in which the entertainment button protrudes upward from the normal operation position,
• the button-up-and-down mechanism including:
• a bias member configured to bias the entertainment button in a moving-up direction;
• a shaft member extending from the normal position to the protruding position of the entertainment button;
• a rotating mechanism configured to rotate the shaft member;
• an engagement part configured to move up and down together with the entertainment button;
• and
• a spiral guide part formed on an outer periphery of the shaft member in a spiral manner,
• wherein the engagement part engages with the spiral guide part, wherein the rotating mechanism rotates the shaft member, and therefore the spiral guide part moves the engagement part in a moving direction, so that the entertainment button moves up and down between the predetermined normal operation position to the protruding position, and
• wherein the spiral guide part includes a first spiral guide portion and a second spiral guide portion, wherein the second spiral guide portion continues to a front end of the first spiral guide portion and has a greater angle of inclination than of the first spiral guide portion.