The invention relates to a direction-changing structure of an endoscope. The direction-changing structure essentially comprises multiple serially coupled joint units. Each joint unit comprises two joint rings separated from each other and two rotation cores. Each rotation core is disposed between the two joint rings and comprises a first core block and a second core block. The first and second core blocks each comprise an embedded part that is fit in a linear hole of the two joint rings. In addition, the second core block contact an end of the first core block with a spherical convex part. Such a direction-changing structure allows an image capturing device of the endoscope to change the direction thereof steadily.本發明有關於一種內視鏡之轉向結構,轉向結構主要是由多數個關節單元串接而成,各關節單元具有二相互間隔之關節環及二轉軸,各轉軸設於兩關節環之間且具有一第一軸塊及一第二軸塊,第一、第二軸塊分別具有一嵌卡部,用以分別嵌設於兩關節環之一線孔內,而且,第二軸塊藉由一球形凸面抵靠在第一軸塊之一端,如此的轉向結構便能使內視鏡之一取像裝置能夠穩定地進行轉向動作。30‧‧‧關節單元40a、40b‧‧‧關節環42‧‧‧第一線孔44‧‧‧第二線孔50‧‧‧轉軸60‧‧‧第一軸塊62‧‧‧第一抵接部64‧‧‧第一嵌卡部66‧‧‧第一穿孔68‧‧‧球形凹面70‧‧‧第二軸塊72‧‧‧第二抵接部74‧‧‧第二嵌卡部76‧‧‧第二穿孔78‧‧‧球形凸面
