DE1257633B - Exchange pen - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 43 k

German KL: 70 b -5/20

Number: 1257 633

File number: R 39209 VII b / 70 b

. Filing date: November 10, 1964

Open date: December 28, 1967

The invention relates to an interchangeable pen with several, each in a rest and Writing position displaceable writing medium carriers, with a locking lug on each of the writing medium carriers is provided on which the writing medium carrier located in each case in the writing position through a rotatable locking disc is held, which in turn under the influence of a pen housing anchored torsion spring and which by the next advanced writing medium carrier can be rotated out of its position in which the first writing medium carrier could be locked.

An interchangeable pen, which in principle shows such a structure, is from the German patent specification 915 905 known.

The invention has now set itself the task of manufacturing by reducing the number of individual parts or to simplify the assembly of such an interchangeable pen.

This object is achieved according to the invention in that the torsion spring is formed by a spring bar is, which is integrally connected to both the locking disc and a counter bearing is, which can be set in the pen housing.

The invention is explained in more detail below using an exemplary embodiment with reference to the drawing. The same components are provided with the same reference symbols in all figures. It shows

F i g. 1 a longitudinal section through the pen,

F i g. 2 the spring bar according to the invention with locking disk, counter bearing and guide cylinder and

F i g. 3 the locking disc in plan view.

In the present embodiment it is assumed that it is an interchangeable pen with four writing medium carriers. In Fig. 1 shows two of these writing medium carriers 10 and 12, the writing tips 1 and 3 of which are pressed in the writing position through a recess in the housing 2 of the interchangeable pen. Push buttons 15 and 17 are used to actuate the individual writing medium carriers. These press buttons are provided with locking lugs 21, 22 which engage in a rotatable locking disc so that the writing medium carriers are held in their position (rest or writing position). This locking disk consists of as many projections 27 and recesses 26 as there are writing medium carriers - in the exemplary embodiment according to FIG. 3 so four each.

The locking disk 26, 27 is integrally connected to a spring bar 30, which is the torsion spring Exchange pen

Applicant:

Real Patent Evaluation Institute, Vaduz

(Liechtenstein)

Representative:

Dr. D. Louis, patent attorney,

Nuremberg, Keßlerplatz 1

Claimed priority:

Switzerland of June 27, 1964 (8474)

forms, with which the locking disc 26, 27 can be rotated. As in Fig. 2 is the spring bar also integrally connected to a counter bearing 9 and an upper guide cylinder 31. That Counter bearing 9 is used to fix the spring rod 30 acting as a torsion spring in the housing 2 and at the same time to guide the writing medium carrier 10, 12, which through corresponding holes 8 of the counter-bearing 9 are passed through.

The spring bar according to the invention, which is shown in FIG. 2 can be clearly seen, is complete with guide cylinder 31, locking disc 26, 27 and counter bearing 9 made as a one-piece component. This will not only considerable assembly time saved, but also, above all, assembly using automatic machines is possible made.

The material for the new molded part is such. B. nylon or any synthetic resin whose elasticity sufficient to allow the required torsion of the spring bar 30, which is stiff at the same time is enough that the protrusions 27 of the locking disc by the pressure acting on them not be bent.

Claims (3)

Patent claims: 1. Interchangeable pen with several, each displaceable in a rest position and a writing position Writing medium carriers, a locking lug being provided on each of the writing medium carriers is, on which the writing medium carrier located in each case in writing position by a rotatable Locking disc is held, which in turn is under the influence of a torsion spring anchored in the pen housing and which is advanced by the next 709 710/155 benen writing medium carrier can be rotated out of its position in which the first writing medium carrier was locked, characterized in that the torsion spring is formed by a spring rod (30) which is connected to both the Locking disc (26, 27) as well as with a counter bearing (9) is integrally connected, which can be fixed in the pen housing (2). 2. An interchangeable pen according to claim I _1, characterized in that the spring rod (30) is integrally connected to a guide cylinder (31) at the end opposite the counter bearing (9). 3. Interchangeable pen according to one or both of the preceding claims, characterized in that that the locking disc with recesses (26) and projections (27) accordingly the number of intended writing medium carriers (15, 17) is provided. Considered publications:
German patent specification No. 915 905. 1 sheet of drawings 709 710/155 12.67 © Bundesdruckerei Berlin