Medical knife
A medical knife that can be assembled with different blade spacings, provided with only one handle includes a pair of side walls on respective sides of the handle, at least in the forward portions of the handle the side walls being formed individually on different handle-constituting parts and a pair of blades separately mounted on the insides of these side walls; and the handle before being assembled to constitute a medical knife is configured such that the two handle-constituting parts forward of a connecting part can be spread apart and closed together, centered on the connecting part, and such that the spacing distance between the two side walls is adjustable.
1. A disposable medical knife comprising a handle, a spacing maintenance member, and two blades, the handle comprising a pair of facing handle-constituting parts, each of the handle-constituting parts having, spaced from a proximal end of the handle, a side wall facing the side wall of the other handle-constituting part and the handle-constituting parts being joined by a connecting part forming the proximal end of the handle, the handle-constituting parts and the connecting part being integrally formed of the same flexible material which allows the two handle-constituting parts to be spread apart and closed together for assembling the disposable medical knife;
wherein:
a respective fitting hole is formed in each of the side walls;
a respective fitting protrusion is provided on each of respective sides of the spacing maintenance member facing respective said side walls;
each of the blades has an insertion hole; and
the spacing maintenance member is situated between the two side walls, and each of the blades is situated between a respective one of the sides of the spacing maintenance member and a respective one of the side walls, and each of the fitting protrusions on the spacing maintenance member is inserted through the insertion hole in a respective one of the blades and fitted into the fitting hole in a respective one of the side walls, whereby the blades are fixed between the spacing maintenance member and the side walls.