Mechanical pencil

B - Operations – Transporting – 43 – K

Patent

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Details

B43K 21/20 (2006.01) B43K 21/22 (2006.01)

Patent

CA 2542879

The invention relates to a mechanical pencil, comprising a body (2) which extends between a rear end and a front end (2a) and a lead feeding mechanism which comprises: a moving member (20), having a bearing surface (21a), a clamp (30), connected to the moving member, a clamping ring (18) which cooperates with the clamp head (32) and an elastic element (19), having a rear end (19b) which is supported on the bearing surface (21a). Said elastic element tensions the ring (18) against the head (32) when the feeding mechanism is at rest. A moving sleeve (40) is arranged between the clamping ring (40) and the front end (19a) of the elastic element. The clamp (30) is movable in relation to the moving member (20) along a determined stroke length. The body (2) has a stop (4b) for limiting the forward movement of the sleeve (40).

Porte-mine comprenant un corps (2) s'étendant entre une extrémité arrière et une extrémité avant (2a), et un mécanisme d'avance de la mine qui comporte : - un organe mobile (20) présentant une surface d'appui (21a) ; - une pince (30) reliée à l'organe mobile ; - une bague de serrage (18) coopérant avec la tête (32) de la pince; - un élément élastique (19) présentant une extrémité arrière (19b) en appui contre la surface d'appui (21a). L'élément élastique sollicite la bague (18) contre la tête (32) lorsque le mécanisme d'avance est en position de repos. Une douille (40) mobile est agencée entre la bague de serrage (40) et l'extrémité avant (19a) de l'élément élastique. La pince (30) est mobile par rapport à l'organe mobile (20) sur une course déterminée. Le corps (2) présente une butée (4b) pour limiter le déplacement vers l'avant de la douille (40).

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