Writing instrument having color indication-changeable grip

A writing instrument having a color indication-changeable grip, comprising:

• a barrel;
• plural identifying marks disposed in parallel in a circumferential direction at a front portion of the barrel and having different identification characteristics that distinguish the identifying marks from one another;
• a gripping tube rotatably held on the barrel and covering the identifying marks;
• a window portion formed on the gripping tube and through which is visible an identifying mark selected by rotating the gripping tube relative to the barrel;
• locking means disposed between the gripping tube and the barrel for locking the gripping tube in releasable contact with the barrel;
• and a locking piece housed to undergo movement in a longitudinal direction within the barrel behind the gripping tube, wherein the locking means comprises a locking pawl and a locking groove which engages with the locking pawl, the locking groove is disposed on one of the gripping tube and the locking piece, the locking pawl is disposed on the other of the locking piece and the gripping tube, and the locking piece is urged by a locking spring in a direction that engages the locking pawl with the locking groove.

A writing instrument having a color indication-changeable grip, comprising:

• a barrel;
• plural identifying marks disposed in parallel in a circumferential direction at a front portion of the barrel and having different identification characteristics that distinguish the identifying marks from one another;
• a gripping tube rotatably held on the barrel and covering the identifying marks;
• a window portion formed on the gripping tube and through which is visible an identifying mark selected by rotating the gripping tube relative to the barrel;
• and locking means disposed between the gripping tube and the barrel for locking the gripping tube in releasable contact with the barrel, the locking means comprising a locking groove formed at a rear end of the gripping tube, and a locking pawl protruding from the barrel in the direction towards the gripping tube so that it engages with the locking groove, and connection and release of the locking means is effected by displacing the gripping tube in a longitudinal direction of the barrel.

A writing instrument having a color indication-changeable grip, comprising:

• a barrel;
• a cylindrical color piece inserted over a front end of the barrel;
• plural identifying marks disposed in parallel in a circumferential direction on the color piece and having different identification characteristics that distinguish the identifying marks from one another;
• a gripping tube rotatably held on the color piece and covering the identifying marks;
• means attaching the color piece in a rotation-prevented state between the gripping tube and the front end of the barrel;
• a window portion formed on the gripping tube and through which is visible an identifying mark selected by rotating the gripping tube relative to the color piece;
• and locking means disposed between the gripping tube and the barrel for releasably locking the gripping tube in releasable contact with the barrel.