DE1879858U - WRITING DEVICE, IN PARTICULAR BALLPOINT PEN. - Google Patents

Description

.-3 ft M * - ?. ?

PATENT LAWYERS "···« · "■ ' cut- Q ^ DR. LOTTERHOS - DR-ING. LOTTERHOS FRAHKFURT (MAIN)

ANNASTRASSE 19 TELEPHONE! (0611) 555061 TELEGRAMS: LOMOSAPATENT LANDESZENTRALBANK 4/951 DRESDNER BANK FFM., No. 524742 POSTSCHECK ACCOUNT FFM. 1667

IV / Mz

FRANKFURT (MAIN) _f June 6, 1965

Merz & Krell, Sehreibwarenfabrik, Groß-Bieberau

about Darmstadt

Writing utensils, in particular ballpoint pens

The firing concerns a stepless pressure mechanism for a writing implement, especially for ballpoint pens. This printing mechanism is produced in very large numbers and built in, so that an economical production method and an easy installation or assembly possibility of is of particular importance.

The writing instruments or ballpoint pens with stepless Printing mechanics have control cams in the housing, which are designed as teeth. Set these gears represent the control surfaces on which the cams of a substantially cylindrical part rotatable in the housing

slide as soon as a push of the operating button of the Pressure mechanics is exerted. Each time the The actuating button becomes the rotatable part by an angular amount determined by the formation of the toothing moved further, this rotatable part alternating an upper and a lower layer under the influence of the over the mine assumes spring force acting on it.

In known, essentially rigid rotatable parts with cams, the toothing must be made as a loose part, which is only attached to the housing during assembly.

According to the innovation, the rotatable part that interacts with the control cams is in at least one section designed to be resiliently compressible, so that it moves with its cams in the axial direction into the position between the or can be introduced next to the control cams. Preferably this resiliently compressible part also has one Snap connection for attachment to the actuation button of the push mechanism. It is useful to use the rotatable part as To form the sleeve and to manufacture this from a suitable, resilient plastic. To increase the Elasticity can be provided parallel to the axis of the sleeve slots.

In one embodiment of the innovation article, have the control cams facing each other surfaces, between which a pair of cams of the rotatable part or the sleeve lies. In another embodiment, the control surfaces are facing away from each other and the rotatable part or the

The sleeve has two pairs of cams above or below the the control surfaces bearing toothing. This embodiment has the advantage of particular simplicity.

The drawing shows exemplary embodiments of the subject of the innovation shown.

It shows:

lig. 1 shows an embodiment of the printing mechanism according to the novelty in not assembled condition, the writing lead partly broken off;

FIG. 2 shows the rotatable part, compared to that in FIG. 1

illustrated position rotated by 90 ° and

lig. 3 shows another embodiment of the subject of the innovation in a representation similar to that of IFig. 1.

The rotatable part designed as a sleeve 1 has four cams 2 which are arranged in pairs on the front and rear ends of the sleeve 1 on the outside. The housing part 4 of the writing instrument has a toothing 3 »on the inside, the control surfaces of which are denoted by 3a and 3b, facing away from one another. When inserting the sleeve 1 into the housing part 4, the front end of the sleeve 1 can be so strongly compressed due to the elasticity of the material and due to the attachment of the slots 5 that the front cams 2 through the toothing 3> their inner diameter is smaller ± st _} than the diameter of the housing part 4 ·, can pass. When the sleeve 1 is pushed in far enough, the front part of the spreads

Sleeve 1 with the squats 2. The control cams and the Cam-carrying bodies are therefore in the simplest possible way without that a bond or the like. Was necessary, assembled.

To connect the actuating button 6 to the sleeve 1, a bing flange 9 is provided in the sleeve, against which the annular surface 8 of the ZapfenMrpfes 7 rests on the push button S is. Push button 6, housing part 4 with toothing and control cams 3a »3b and the sleeve Λ are now assembled so that they cannot be lost. The described design of the individual parts makes production and assembly more economical and simpler than before.

In the embodiment illustrated in Fig. 3, the squat body 11 has only one pair of cams 12, which between the facing control surfaces 13a and 14a of the Toothing 13 and 14 is to be introduced. The mine is labeled 15.

Claims (5)

PA371 · Claims for protection 1. Writing implement, especially ballpoint pen with stepless pressure mechanism, the control cams within the Housing or a housing part and a rotatable in the housing, essentially cylindrical, with cams provided part, characterized in that the cylindrical part has at least one resiliently compressible portion which the axial introduction the cam in the position between the or *. next to the control curves / permitted » 2. Writing implement according to claim 1, characterized in that the rotatable part as a plastic sleeve, preferably is formed with slots parallel to its axis in the compressible portion. 3. Writing implement according to claim 1 or 2, characterized in that that a snap connection between the rotatable part or sleeve and the operating button of the Print mechanics is provided. 4 ·. Writing implement according to Claims 1 to 3, characterized in that that the control cams have remote control surfaces, and that the rotatable part or the sleeve is provided with two pairs of cams, which in the assembled state above and below the control surfaces lie. It 5. Writing implement according to claim 1 "to 3» marked thereby t that the control cams have mutually facing control surfaces and the rotatable! part or the Sleeve is provided with a pair of crouches, which lies in the assembled state between the control surfaces.