DE2450583A1 - Two-colour retractable ball pen - double helical cam slots in telescopic sleeves for raising and lowering writing units - Google Patents

Abstract

The two colour retractable ball pen with two writing units mounted inside the casing, as in the main patent, has an improved retracting mechanism intended to give an adequate length of movement for each unit (15, 16) which includes a semicircular adaptor (9, 10) supporting each refill unit, with a peg (11) secured near the top, extending outwards, so as to pass through an inner sleeve (1) with a curved helical cam slot each side, for the two pegs, each slot being of opposite hand, and also passing through an intermediate sleeve (2) which has two similar cam slots each side, crossing one another in X formation, the peg passing through their junction point. The effect of the opposed cam slots is to lift one unit while lowering the other.

Description

ADDITIONAL "two-color pen, especially ballpoint pen" to . ... ... (P 23 15 698.1) The invention relates to a development of the Two-color interchangeable pen, especially a ballpoint pen according to the patent. ... ... (P 23 1 »698.1) with cam-controlled forward and return mechanism.

The two-color interchangeable pen, esp. -E ballpoint pen with cam-controlled Forward and return mechanism according to the main patent is characterized in that the two mine carriers in oppositely intersecting screw curves one rotatable arranged coulisse grip, with the mine carrier with end bends in the screw curves on the rotating backdrop, while the lead ends in longitudinal slots a guide sleeve pushed over the backdrop slide back and forth.

According to this embodiment, there is a relatively large rotary path for the retrieval of one mine carrier and the subsequent advance of the second Mine carrier.

It is now the object of the invention to develop the interchangeable pen design According to the main patent, a significant shortening of the return and feed rotation path to reach.

The two-color interchangeable pen, especially a ballpoint pen with cam-controlled Forward and return mechanism, with the two mine carriers crossing each other in opposite directions Screw curves according to the patent. .. ... (P 23 15 698.1) work together according to of the invention, is now characterized in that at intersecting screw curves in the form of opposing screw slots on two nested and against each other rotatable link sleeves (inner and outer sleeve) on their when turning shifting intersections engage the mine carrier ends, whereby the screw slots can be arranged steeply and thereby errenhen a significant rotation shortening leaves.

In detail, the inner link sleeve can be rotated in the outer Link sleeve to be suspended and the inner sleeve at the end that ripens through the end sleeve and the outer sleeve at the front end carries the front sleeve.

The two mine carrier ends run in an advantageous manner by means of a (plastic) half cylinder in the inner sleeve and grip each with an inserted guide pin through the intersection of the screw slots of the both link sleeves.

An embodiment of the two-color interchangeable writing pen according to FIG The invention is shown schematically, for example, in the drawing, namely show: F i g. 1 and 2 each have a central longitudinal section through the pen mechanism with twisted position, FIG. 3 a juxtaposition of the sleeves and individual parts, F i g. 4 shows the view of the two link sleeves in the starting position and FIG. 5 shows a leading end of the mine carrier in an enlarged view.

As can be seen from the drawing, the two-color change pen consists of esp. ballpoint pen with cam-controlled Forward and Rüc @ holmechanik from two nested and mutually rotatable link sleeves 1 and 2, d.

H. the inner sleeve 1 is rotatably suspended in the outer sleeve 2.

The link sleeves 1 and 2 have counter-rotating screw slots 3 and 4, their intersection points 5 accordingly upwards when turned or hike down.

The inner sleeve 1 carries on the penetrating and by means of snap ring 6 rotatably suspended end the pen end sleeve 7 and the outer sleeve 2 at the front End of the pen front sleeve 8. The two lead carrier ends are plastic half-cylinders 9 and 10 are formed and run in the inner sleeve 1, where they are inserted with the guide pin 11 through the respective intersection point 5 of the screw slots 3 and 4 of the two Link sleeve 1 and 2 are enough and accordingly when turning the inner sleeve 1 by means of the end sleeve 7 in the outer sleeve 2 with the front sleeve 8 held in place. be returned.

After the clip 12 has been interposed, the end cap is on the end sleeve 7 13 screwed in or screwed on at the end. As usual, the mine carriers run in front-e in receiving tubes 14 15 for the writing leads 16 from.

Claims (3)

Patent claims: Two-color interchangeable pen, especially ballpoint pen with cam-controlled Forward and return mechanism, with the two mine carriers crossing each other in opposite directions Screw curves according to the patent. ... ... (P 27 15 698.1) work together, thereby characterized in that at intersecting screw curves in the form of opposite directions Screw slots on two nested and mutually rotatable Link sleeves (inner and outer sleeve) on their shifting when turning The ends of the mine girders at the intersections. 2. Two-color changeable pen according to claim 1, characterized in that that the inner link sleeve is rotatably suspended in the outer link sleeve and the inner sleeve at the penetrating end, the end sleeve and the outer sleeve at the front End carries the front sleeve. 3. Two-color interchangeable pen according to claim 1 or 2, characterized characterized in that both mine carrier ends are each in the form of a (plastic) half-cylinder run in the inner sleeve and each with an inserted guide pin through the Grab the intersection of the screw slots of the two link sleeves. L e r s e i t e