DE4402904A1 - Refill holder, for pen, with clamp pliers and pressure mechanism - Google Patents

Abstract

The holder comprises a refill brake in the shaft point (3), for temporary retention of the refill. The shaft point has an axially inwardly directed extension (31), which is provided with at least one pressure edge (32). On the clamp pliers (6) is formed spring-shaped casing (61) directed forwardly to the shaft point, which has at least one pressure position (62). The axial pressure path of the clamp pliers and of the thumb-release is greater than the feed path of the clamp ring (7). The refill brake (8) is arranged on the radially sprung extension (31) of the shaft point and is of one-piece construction with it.

Description

The invention relates to a lead holder with pliers and Print mechanics.

Such lead holders are particularly so-called Mechanical pencils, fountain pens or fine pencils in principle known.

For example, in DE-PS 20 34 500 a mechanical pencil shown and described, the one clamp and one Clamping ring and a system for gradually advancing one Mine by pressing a trigger.

In addition, there is an axially movable lead tube with a Provide mine brake and into the shaft tip arranged retractable.

From US-PS 4,687,363 is also a mechanical Mechanical pencil known, at the tip of a shaft Mine brake is molded.

A disadvantage of the known pencils is that they are generally only suitable for relatively solid mines whose Surface is not too soft and safe thanks to the clamping pliers can be held. In the case of relatively soft mines, squeezes the pliers often and can firmly into the surface of the lead then the mine is no longer functional and safe release.

This often leads to malfunctions when in such pencils, for example wax leads, Eraser strands or other soft mines can be used should.

The object of the invention is therefore to provide a lead holder Clamping pliers and pressure mechanics create these disadvantages does not have and which is relatively softer for use  Mines is just as suitable as for normal burned mines relatively firm surface.

This object is achieved with the features of claim 1. Advantageous embodiments and further developments are in includes the further claims.

On the basis of some exemplary embodiments, the invention is described with With the help of the illustrations explained in more detail below.

Here shows:

Fig. 1 shows a mechanical pencil according to the invention in the depressed position,

Fig. 2 the mine holder acc. Fig. 1 in clamping position,

Fig. 3 the mine holder acc. Fig. 1 and 2 in the feed position, and

Fig. 4 the mine holder acc. Fig. 1 to 3 also in the fully depressed position.

In the lead holder 1 according to the invention shown in FIGS . 1 to 4 with a clamp pliers 6 and a pusher 4 , the clamp pliers 6 are assigned an axially limitedly movable clamping ring 7 for the gradual advancement of a lead 9 by actuating the pusher 4 . A mine brake 8 is arranged in the shaft tip 3 , for temporarily holding the mine 9 during the trigger actuation.

The shaft tip 3 in this case has an axially inward projection 31 which is provided with at least one pressure edge 32 .

An annular sleeve 61 which is directed toward the shaft tip 3 and has at least one pressure point 62 is formed on the clamping pliers 6 .

When the pusher is actuated, the axial pressure path 41 of the clamping pliers 6 or the pusher 4 is greater than the feed distance 71 of the clamping ring 7 .

The pressure edges 32 on the projection 31 act upon the spreading distance 63 of the clamping pliers 6 and in the advanced position of the clamping pliers 6 the pressure point (s) 62 arranged on the sleeve 61 , as a result of which the clamping pliers 6 are always forcibly opened.

The lead brake 8 is arranged on the radially resilient extension 31 of the shaft tip 3 and is formed in one piece with the extension and with the shaft tip 3 .

The axial pressure path 41 of the clamping pliers 6 or the pusher 4 results overall from the feed distance 71 of the clamping ring 7 and the lead 9 and the spreading distance 63 of the clamping pliers 6 .

It is also advantageous if the cooperating pressure edges 32 and pressure points 62 are chamfered or tapered.

The bore 64 of the sleeve 61 should also slide with play over the jacket 34 of the neck 31 .

Reference list

1 lead holder
2 shaft
3 shaft tip
31 approach (to 3 ),
32 printing edge (at 31 ),
33 stop,
34 coat (out of 31 );
4 pushers;
41 printing path,
42 pressure plate
5 spring;
51 support ring
6 clamp pliers;
61 sleeve (at 6 ),
62 pressure point (in 61 )
63 spreading distance (of 6 ),
64 holes (out of 6 );
7 clamping ring
71 feed path (mine 9 )
8 mine brake
9 mine
91 mine surface

Claims (5)

1. lead holder with clamping pliers and pressure mechanism, the clamping pliers being assigned an axially limitedly movable clamping ring for the gradual advancement of a lead by actuation of a pusher, and wherein a lead brake is arranged in the tip of the shaft for temporarily holding the lead,
characterized,
that the shaft tip ( 3 ) has an axially inward projection ( 31 ) which is provided with at least one pressure edge ( 32 ),
that an annular sleeve ( 61 ), which is directed towards the shaft tip ( 3 ) and has at least one pressure point ( 62 ), is formed on the clamping pliers ( 6 ),
that the axial pressure path ( 41 ) of the clamping pliers ( 6 ) or the pusher ( 4 ) is greater than the feed distance ( 71 ) of the clamping ring ( 7 )
and that the pressure edge ( 32 ) on the shoulder ( 31 ) when the spreading distance ( 63 ) of the clamping pliers ( 6 ) is covered and in the advanced position of the clamping pliers ( 6 ) the pressure point (s) ( 62 ) arranged on the sleeve ( 61 ) ) acted on, whereby the clamp ( 6 ) is always forced to open. 2. Mine holder according to claim 1, characterized in that the mine brake ( 8 ) on the radially resilient projection ( 31 ) of the shaft tip and is integrally formed therewith. 3. Mine holder according to claim 1 or 2, characterized in that the axial pressure path ( 41 ) of the clamping pliers ( 6 ) or the pusher ( 4 ) overall from the feed path ( 71 ) of the clamping ring ( 7 ) and the lead ( 9 ) and the spreading distance ( 63 ) of the clamping pliers ( 6 ). 4. Mine holder according to one of the preceding claims, characterized in that the interacting pressure edges ( 32 ) and pressure points ( 62 ) are chamfered or tapered. 5. Mine holder according to one of the preceding claims, characterized in that the bore ( 64 ) of the sleeve ( 61 ) with play over the jacket ( 34 ) of the projection ( 31 ) slides.