DE1219825B - Pen, especially ballpoint pen, with a length-adjustable refill - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B43k

German KL: 70 b-S / 20

Number:

File number:

Ahem

Display day:

R29525Vnb / 70b
January 24, 1961
June 23, 1966

The invention relates to a pen, in particular Ballpoint pen, with longitudinally adjustable writing refill ") in which the displacement of the writing lead with a thrown from behind in the hollow stylus introduced pressure pen and the locking of the writing lead in writing and rest position with the help one arranged directly on the pressure pin, in particular stepped locking nose in cooperation with an opening in the pen shank is effected.

There are ballpoint pens with adjustable length This type of writing mine is known, but where the Äffetiernäse on a springy, on the longitudinal shifting device Pressure pin seated tongue is arranged; which on the one hand offers the possibility of using the push pin v © a to be built into the back of the pen, and on the other hand, the locking lug engages in the opening that interacts with it effected in the pen shaft. The locking nose can take the form of a simple elevation $ z. B. a cone, in which case in your SeÖrSibstiftsöhaft two hftitereiöaöderltegeHde through ' fereenungen must be provided, of which the the front one is used to lock in the writing position, the rear zux lock in the rest position. It can but only one breakthrough must be provided in the pen shaft, in this case the Locking nose be designed stepped or it must be both the locking nose and the opening an appropriate, z. B. Have a T-shaped design *

The formation of the adjustment device for the writing lead in the manner described above Although it has the advantage that the pen - apart from the lead and the adjustment spring - consists of only two parts, namely Pen shaft and pressure pen, can be produced, however, has the disadvantage that the Tension of the resilient tongue diminishes over time and consequently the locking effect and thus the Operational safety are impaired, including the tongue's susceptibility to bruising as a further disadvantage comes.

It is also not new to arrange the locking tab directly on the pressure pin. Thus, the disadvantages resulting from the arrangement of the low nose on a tongue come ifi omission. The known designs of this type, however, have other disadvantages, which result in particular from the fact that a pressure pen fitted with a nose cannot easily be inserted into the pen shaft and removed from it again. For this reason, they require more dreary, less complicated, writing pens, especially ballpoint pens,
with longitudinally adjustable refill

Applicant:

Jacob Ritter K. G., Brensbach (ödenw.)

Named as inventor:

Wilhelm Ritter, Brensbach (Odenw.);

Erich Schödterer, Erbach (Ödenw.)

solutions that serve to overcome this difficulty.

In the case of the pen mentioned at the beginning, the invention consists in the fact that the pen shaft has an on seven well-known, longitudinal slit running forwards at the rear ift that of the Dumhbfeeh five for dgft passage opposite the locking nose WändtSil provided with resilient border walls is and the pressure pin as a support for the pressure finger is a well-known, after the same Wall part has inclined oblique pressure surface. With a pressure pin designed in this way The disadvantages of the known pens, in which the adjustment of the refill of a locking nose sitting on a resilient tongue is caused, as well as the difficulties that arise directly on the push pin when a locking nose is arranged. So there are no both There are parts that have a subsequent effect as well as parts that are susceptible to breakage and there are also none

Difficulties in assembling and disassembling the pen. Since the boundary walls of the rear edge of the shaft forward running cage slide Resiliently yield »is retained by the locking lug on the pressure pin when it is pressed in of the pressure pen in the pen shaft, enough plate to insert the pressure pen into the pen shaft to enterj where, when the shaft breakthrough is reached, under the action of the spring-back Longitudinal slot boundaries jump into this.

The resilient boundary walls of the longitudinal seat allow the removal in an equally simple manner the push pin out of the shaft and by actuation

609 580/50

of the pressure pin alternately transferring the stepped locking lug or the mine into Writing and resting position. The larger step will jump in when the pressure pin is actuated ensured by the beveled pressure surface provided in the pen according to the invention of the pressure pin in cooperation with the resilient longitudinal slot in the shaft, the functionally related Represent features. Their interaction is the prerequisite for production a pen consisting of only two injection-molded parts, namely the pen shaft and the pressure pen created, in which the locking nose instead of a tongue arranged on the pressure pin directly attached to the push pin itself.

It is known per se to obliquely form the pressure surface of the pressure pen of pens with an adjustable refill at the rear. As a rule, however, this is an "arbitrary measure which has no significance with a technical effect. In a known case in which the oblique formation of the printing surface is intended to achieve a technical effect, the oblique printing surface is intended to achieve that the locking lug on the pressure pin emerges more easily from its holder when the lock is released, ie it is intended to produce an effect opposite to that of the inventive pen. Also the arrangement of "a slot running forward from the rear edge of the shaft" is known per se, but the slot in the known designs also serves a different purpose than in the case of the invention. It is also not important in the invention that the features of the invention are known individually, but rather that they are decisive according to the invention the simultaneous use of a shaft slot with resilient boundary walls and a push pin Fte's with an inclined pressure surface "and scratching directly on the pressure pin: two-stage locking nose which, when used at the same time, leads to the described result.
. The invention is illustrated, for example, in the drawing and is explained in more detail below with reference to the drawing.

F i g. 1 of the drawing shows a ballpoint pen in longitudinal section; "."

Fig.2 shows the same ballpoint pen, however only in the rear part · cut lengthways;

F i g. 3 shows the rear part of an empty pen shaft; "ίγ: ·"

Fig. 4 shows a push pin with clip.
'Der'in den Fi'g ^x .: Tt "-ün'd" 2 shown ballpoint pen consists of the pen shaft 1 and the push pin 2. On the push pin 2 sits a stepped locking nose 3, the front step with 3 α and the rear .Stufe with 3 3 is designated. A clip 4 is also attached to the pressure pin ^ and in the pressure pin there is provided a recess 5 which is directed from the front inward and tapers inwardly in a conical shape and in which the rear end of the writing lead 6 is supported The pressure surface 8 of the pressure pin 2 is designed to run obliquely forward from the nose side.

In the pen shaft 1 there is an opening 9 intended to interact with the locking lug 3. Furthermore, the pen shaft is provided on the opposite side with a contactor 10 extending from the rear to the front. If, as shown in the embodiment example, a pressure pin with clip 4 is provided, the slot is so wide that the clip with its attachment part on the pressure pin 2 can slide back and forth in the slot 10 and thus cannot hinder the movements of the pressure pin. The appearance of the ballpoint pen is not affected by this, since the slot is covered by the clip and therefore not

ίο is visible. If a pressure pin 2 without a clip is provided, so it is sufficient if the pen shaft is simple and runs from the back to the front Incision is slit. How the adjustment device works is described below using the illustrations.

When assembling the adjustment device, the pressure pin is inserted into the pen shaft from behind, until it jumps into the opening 9 with the front nose step 3 α. Since the slit at the back

ao pen shaft yields elastically, the locking lug 3 is not an obstacle during assembly in this way. '■ "" -. ■ ---

Fig. 1 shows the writing lead 6 in the rest position. When pressure is exerted on the inclined pressure surface 8 of the

s5 pressure pin 2, this slides forward until the rear step 3 b of the locking lug 3 reaches the area of the opening 9 and jumps into it. In this position, which is shown in Fig: 2, the writing lead is in the writing position. The locking lug 3 is in this position with the step

·. 3 & held at the rear edge of the opening 9 and the pressure pin 2 is consequently at the front with a slight inclination on the slotted shaft wall at.

"" To solve the writing lead from the in Fi g. 2 like-

• the given ■ feed position a short one is sufficient Pressure on the locking lug 3 or at the back against the pressure pin 2. The possible directions for the release pressure on the pressure pin are drawn by

Arrows marked. '

Claims (2)

Patent claims: 1. Pen, especially ballpoint pen, with a longitudinally adjustable refill, in which the Adjustment of the writing lead with the help of one inserted into the hollow pen shaft from behind .Pressure pen and the- "locking of the writing lead in writing and rest position with With the help of a locking lug arranged directly on the pressure pin, in particular a stepped locking lug is effected in cooperation with an opening in the pen shaft, thereby characterized on the pen shaft (1) a known per se, from the rear Shank edge running forward longitudinal slot (10) in which the opening (9) for the passage of the locking lug (3) opposite wall part with resilient limiting T 'walls is provided and the pressure pin (2) as a support for the pressure finger is a known, has inclined pressure surface (8) towards the same wall part. 2. Writing pen, especially ballpoint pen according to spoke 1, characterized in that the longitudinal slot (10), as known per se, so is formed wide that a on the pressure pin (2) 5 6 Fixed clip (4) with its attachment end in German utility model No. 1804 638; it can slide back and forth. French patents No. 1109 615, 1118 319, 1248 510; References considered: British Patent No. 822 245; German Auslegeschrift No. 1075 981; 5 U.S. Patent No. 2,933,067. 1 sheet of drawings 609 580/50 6.66 © Bundesdruckerei Berlin