Patent ID: 8497427

Claim:
A cable sheath comprising plural adapter tubes, each of the adapter tubes having a first end and a second end, each of the adapter tubes comprising: a metal outer tube, formed with a head section, an extension section, an abutting section, and an end section from the first end to the second end, the extension section and the head section having a same inner diameter, an inner diameter of the abutting section being larger than the inner diameter of the extension section, an inner diameter of the end section being gradually enlarged from the abutting section toward the second end; a plastic inner tube, having a fixed section and a protective section which extends from the fixed section, an outer diameter of the fixed section corresponding to the inner diameter of the abutting section, an outer diameter of the protective section corresponding to the inner diameter of the head section and the extension section, the plastic inner tube being inserted into the metal outer tube from the end section so as to make the fixed section abut against the abutting section; wherein, the end section of each of the adapter tubes is adapted to be abutted against by the head section of another adapter tube; wherein, an axial length of the fixed section is smaller than an axial length of the abutting section, so that a spare space is formed inside of the abutting sectionsurface, the spare space is adapted to receive the head section of another adapter tube therein when two of the adapter tubes are slantingly joined to each other, so that a slant angle range between those joined adapter tubes is enlarged.