To provide an artificial joint device which realizes a prosthetic limb allowing twisting motions without using a driving source and achieves the reduction of the size and the cost when using the driving source, and to provide a parallel link mechanism which can realize the artificial joint device.
The artificial joint device 2 for an ankle joint of a prosthetic leg 1 is equipped with the parallel link mechanism 10 to connect between a foot part 3 and an attachment plate 4a. The parallel link mechanism 10 is equipped with a fixed link 11, having the upper end part secured to the attachment plate 4a and the lower end part connected to the foot part 3 through a ball joint 12, and four extending/retracting links 13 having the upper and lower end parts connected to the foot part 3 and to the attachment plate 4a respectively through upper and lower ball joints 14a, 14b.
KIYOMOTO HIROSHI
USUKURA ISAO
NAKAHARA YOICHI
IWASAKI HARUYUKI
UMEDA SHUNGO
YAMAMOTO KAZUNORI
SHIONO MASAMITSU
OKADA KAZUO
NAKAYAMA MANABU
KUBO ATSUSHI
