ES316162A3 - Improvements in instruments of writing bolita writer. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in writing balls of writing ball, of the type comprising a loading tube provided with a writing ball on its tip, axially housed displaceable in a hollow handle and combined with a recoil spring so that by the action of a pushbutton and a retention member can occupy an advanced or writing position, in which the writing tip protrudes from the free end of said handle through a corresponding exit hole thereof, as well as a retracted position, to which it is brought by said spring when the aforementioned retention member is released and in which the aforementioned writer tip is hidden inside the handle, characterized by the push button of the loading tube to the advanced or writing position, as well as the organ for retaining said tube, they are constituted by a single piece adapted to be fitted in an axially slidable manner at the rear end of the instrument handle. and comprising a rear cylindrical guide and bearing portion against the rear end of said tube, as well as three longitudinal tabs forming an extension of the cylindrical surface of said rear portion and determining an axial housing for the rear end portion of the repeated tube. two of these diametrically opposite tongues being provided and the intermediate tongue, which is longer than those, being provided on the external face of its free end with a retention protrusion in the manner of a sawtooth, adapted to cooperate with two openings of fit made in the wall of the instrument handle, longitudinally aligned and separated from each other, to retain the loading tube in the advanced or writing position, and in the retracted position, respectively. (Machine-translation by Google Translate, not legally binding)