JP2011156811A5 - - Google Patents

Claims (3)

Interposed between the front barrel and a rear shaft rotatably and axially movably mounted relative to the rear shaft with fitted removably to said front barrel, wherein said front barrel comprising a center shaft for connecting the rear shaft relatively rotatably, a plurality of writing shaft body is inserted into said center shaft, - selectively protrudes from said front barrel tip by the relative rotation of the rear shaft and the front barrel Shisabotsu In a composite writing instrument to let
More in the fitting portion between said front barrel at the middle axle, together with a slit extending in the axial direction to face at a position bisecting the fitting portion in the radial direction are provided, the positions of both sides of each said slit the engaging rib of forming the circumferential direction, the inner peripheral surface of said front barrel is engaging groove for engaging the said retaining ribs are formed in the circumferential direction,
The composite writing instrument , wherein the locking rib is formed at a position deviated from an intermediate portion between the slits in the circumferential direction at the fitting portion .   2. The composite writing instrument according to claim 1, wherein the locking groove is an annular inner groove formed on the inner peripheral surface of the front shaft. A plurality of anti-rotation ribs extending in the axial direction are formed in the circumferential direction at a position behind the locking rib in the middle shaft, and at a position behind the locking groove on the inner peripheral surface of the front shaft, A plurality of anti-rotation grooves for engaging the anti-rotation rib are formed in the circumferential direction, and the engagement rib and the engagement groove are engaged with each other, and the anti-rotation rib and the anti-rotation groove are engaged with each other. The composite writing instrument according to claim 1 or 2, characterized in that