Chair type massage machine
A massage machine includes a seat portion, a backrest portion and a rocking mechanism center where the backrest portion reclines at a back portion side of the seat portion about a reclining center. The rocking mechanism portion swings the backrest portion and the seat portion about a rocking center, and the rocking center is apart or different from the reclining center.
1. A chair type massage machine, comprising:
a seat portion;
a backrest portion that reclines at a back portion side of the seat portion about a reclining center;
a rocking mechanism portion that swings the backrest portion in a reclining state and the seat portion about a rocking center, which is apart from the reclining center, wherein the rocking mechanism portion comprises a speed changing portion that lowers a swinging speed of the seat portion and the backrest portion as the seat portion and the backrest portion approach front and back track end portions;
wherein the speed changing portion comprises:
a decelerator and a link portion, wherein an output shaft of the decelerator rotates at a constant speed by a constant rotation of a motor,
and wherein the link portion converts a rotation movement of the output shaft into a reciprocating movement of the seat portion and the backrest portion and changes the reciprocating movement speed;
a fixed frame;
and a movable frame, wherein the movable frame supports the backrest portion and the seat portion and reciprocates with respect to the fixed frame;
wherein the link portion comprises:
a rotation member that rotates about a rotation center with a rotation of the output shaft,
an eccentric shaft attached to the rotation member eccentrically with respect to the rotation center, and
a crank member attached to the eccentric shaft, wherein the crank member converts a movement of the eccentric shaft about the rotation center into a reciprocating movement of the movable frame.
2. The chair type massage machine according to claim 1 , further comprising:
a power transmission releasing portion that releases a swinging force of the backrest portion and the seat portion to interrupt swinging the backrest portion and the seat portion.
3. The chair type massage machine according to claim 1 , further comprising:
a reaction member that produces a force to interrupt swinging the backrest portion and the seat portion.
4. The chair type massage machine according to claim 1 , wherein the rocking mechanism portion includes a drive unit that swings the backrest portion and the seat portion.
5. The chair type massage machine according to claim 1 , wherein the backrest portion comprises a massage tool.