| 摘要 |
A multiple unit writing instrument includes end to end relatively rotatable barrel section housing a body member rotatable with the front barrel section and a cylindrical cam rotatable with the rear barrel section and having in its outer face a longitudinal guide groove extending to the raised portion of the end cam face and slidably engaged by an actuating member. A pair of writing elements are slidable in guideways in the body member between advanced and retracted positions and carry followers engaging guide slots and the cam face. One of the writing elements is a mechanical pencil including a pencil lead engaging clutch controlled by a rearwardly projecting spring biased plunger which is engaged by a corresponding follower so that when the cam is turned to advance this element to its operative position and the actuating member then longitudinally advanced to depress the plunger the pencil lead is propelled, the further forward movement of the pencil element being restricted by the barrel front opening border. A spring retracted rear push button is coupled to the actuating member and the followers are spring retracted to engage the cam face.
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