Abstract: A universal joint is provided with a rotation shaft having a ball portion provided at an end thereof and a pair of projections formed on a diameter line of the ball portion, and a rotation body having guide grooves formed for receiving insertion of the respective projections of the rotation shaft and a holding hole formed for holding the ball portion, the ball portion being rotatable about an axis line of the projections and rotatable while inclining the projections along the guide grooves. In the universal joint pins serving as a stopper are provided in the holding hole for inhibiting the ball portion from slipping off.

Abstract: Prevention of movement of the rotational center of a spherical member provided at one end of a rotary shaft is achieved with an inexpensive structure. A universal joint is equipped with a rotary shaft 21 having a spherical member 22 provided at one end and having a pair of shafts 24 provided on the diameter line of the spherical member 22; and a rotating body 26 having guide grooves 28 formed therein for receiving the shafts of the rotary shaft, and a holding cage 27 formed therein for trapping the spherical member 22, the spherical member rotating about the axis of the shafts and also rotating while tilting the shafts along the guide grooves. Raised portions 30 are provided in the holding cage for preventing the spherical member from falling out of position.

Abstract: In inexpensive structure, a rotation center of a ball portion provided on a rotation shaft is prevented from moving. A universal joint is provided with a rotation shaft (21) having a ball portion (22) provided at an end thereof and a pair of projections (24, 25) formed on a diameter line of the ball portion (22), and a rotation body (26) having guide grooves (28) formed for receiving insertion of the respective projections of the rotation shaft and a holding hole (27) formed for holding the ball portion (22), the ball portion being rotatable about an axis line of the projections and rotatable while inclining the projections along the guide grooves. In the universal joint pins (32, 33) serving as a stopper are provided in the holding hole for inhibiting the ball portion from slipping off.