Cam transmission mechanism with ball followers

A cam transmission mechanism, comprising:

• a revolving disk rotatable about a first axis, including a disc-shaped body having a periphery formed with a plurality of projections, any two adjacent ones of said plurality of projections which defining an accommodating recess therebetween;
• and
• a camshaft adjoining said rotary disk along a second axis that is perpendicular to the first axis and rotatable about a third axis that is perpendicular to both said first axis and said second axis, said camshaft including:
• a shaft rod, and
• a cam body sleeved on said shaft rod, said cam body having an outer surface abutting against said periphery and at least one groove that is formed in said outer surface and that is communicated with some of said accommodating recesses, said at least one groove and said accommodating recesses cooperating to form a plurality of confining spaces, respectively, each extending partially along a tangential direction of said rotary disk;
• a plurality of contact members, each accommodated freely rollably in said confining spaces for transmitting rotational power of said camshaft to said rotary disk;
• and
• a housing receiving said rotary disk so as to confine said contact members therebetween and in said confining spaces, respectively.