Acetabular cup removal device for artificial hip joints

An acetabular cup removal device for artificial hip joints, comprising:

• a main shaft that can be mounted on a power tool and rotated by a driving force of the power tool;
• and
• a cutter section provided at a front end of the main shaft, capable of tilting along an acetabulum where an acetabular cup is implanted, and cutting the acetabulum while being rotated by the main shaft,
• wherein the cutter section includes:
• a cutter tilting unit capable of tilting along the acetabulum around an imaginary tilting axis,
• a cutter mounting unit coupled to the cutter tilting unit in a manner that allows relative sliding toward or away from the imaginary tilting axis, and
• a cutter detachably mounted on the cutter mounting unit;
• wherein the cutter tilting unit includes:
• a first through-hole penetrating along the imaginary tilting axis,
• a connecting bar fixed at ends of the connecting bar to the cutter mounting unit, and
• a leaf spring fixed at ends of the leaf spring to the connecting bar, with a central portion between the ends of the leaf spring;
• wherein the main shaft includes:
• a cylinder member inserted into the first through-hole and having a second through-hole formed along a longitudinal direction of the cylinder member;
• wherein the connecting bar is positioned within the second through-hole and is capable of sliding toward or away from the imaginary tilting axis, and
• wherein the central portion of the leaf spring is supported by an inner wall of the second through-hole.