DE1610437A1 - Retaining element for attaching a hollow push-button male part to a carrier material - Google Patents

Description

dr. w. Schalk - dipl. ~ ing. Peter Wirth

DIPL-ING. G.E. M. DANNENBERG · DR. V. SCHMIED-K.OWARZIK

6 FRANKFURTAM MAIN

CR. ESCHENHEIMER STR. 39

September 29, 1966

Da / Fa P-61-97-5

Soovill Manufacturing Company Waterbury, Oonneot./ USA

Retaining element for attaching a hollow push-button male part to a carrier material

The invention relates to fastening a hollow Push-button patrix on a carrier material and relates in particular to the permanent attachment of the patrix

When using holding elements with pegs to attach patrices, the hollow peg is usually upwards tapered with a sharp edge at the upper end, to pierce the material as it enters the hollow pin of the patrix. Further axial pressure is then used on Pin of the holding element whose open end is within the Patrix compressed or bent like a rivet »included however, it is always difficult to obtain a uniform deformation to reach the end of the pin on the retaining element

009843/0028

In some cases, a deformation occurs only on one side of the pin end and then results in a relatively weak and by no means reliable fastening, especially if the carrier material is heavy or relatively thick. In other cases, in turn, when the holding element is used for lighter carrier materials, the pin of the holder element occasionally shows the tendency to deform below the male neck, with shear stresses occurring in the longitudinal direction of the pin _{or the like}

These disadvantages are countered according to the invention in that a holding element for attaching the hollow Male part of a push button is provided, which has a bottom flange and a pin open at the top has an essentially cylindrical contour with a tapered upper hand part, and is characterized in that that on an inwardly deformed neck part an outwardly widening end portion at the open the free end of the pin is provided, as well as a convex area below the enlarged end section, which represents a zone of reduced resistance to axial pressure, which is below such an axial Outward pressure is deformable.

In the case of a holding element 009843/0028 designed according to the invention

is accordingly a predetermined weakened zone "when pressed together with the punch in place causes a deformation within the Patrizenkopfes. This arises as an inevitable consequence of the outwardly convex curved bead or surface portion on the pin of the supporting member below the inwardly directed neck portion ₀ In addition, a stronger and more uniform outward inclination of the end section is achieved by the neck part near the upper end of the pin, with a sharp edge on the outside which is particularly suitable for cutting into the carrier material

An embodiment of the invention is as follows described in more detail using the drawing, namely show:

Pig. 1 shows a holding element according to the invention in its position for attachment to the carrier material and for attachment to the patrix of a push button}

Fig. 2 shows the position of the in Fi / *. 1 parts shown when penetrating the carrier material;

3 shows the beginning of the "compression" or "upsetting";

Fig. 4 shows the final assembled form with a relatively strong carrier material and

Fig. 5 also shows the final assembled form with a thin carrier material.

009843/0 0 28

The push-button male part shown in the drawing has a conventional shape with a bottom flange 6, a head 7, with a depressed top 8 and a neck portion 9. This results in a narrowed inlet opening 10 and an annularly delimited space 11 for receiving the free end of a pin on the holding element.

The holding element also has a bottom flange and a pin open at both ends with a substantially cylindrical wall 13, which is different from the usual tapered pin - perpendicular extending upwards from the bottom flange «Mowing the upper end is an inwardly directed neck part on the pin 14 shaped in such a way that an outwardly widening end section 15 and a convex region 16 are formed will. This results in a uniform inclination of the end section 15 with an outer sharp edge 17, whose largest outer diameter is preferably slightly larger than that of the rest of the wall part 13 the diameter of this cutting edge 17 is a little larger than the inlet opening 10 of the patrix, so that the sharp edge cuts through the carrier material 18, as shown in Fig. 2 «

When the pin 13 penetrates into the annular space 11 of the patrix, the protruding end section jams

0098A3 / 0028

of the pin on the male wall and further pressure leads to the deformation of the pin wall 13 in the area of zone weakened by the convex section 16 · This not only results in a uniform one Compression and deformation of the pin wall at the desired point, but it "is advantageously." also the possibility of holding elements with a certain tenon length for a large range of different Thicknesses of the carrier material 18 to be used. So with relatively thick material (Fig. 4) the wall of the pin 13 is still sufficient in the area of the weakened zone 16 ostracized in order to ensure a secure hold of the patrix, while with thinner carrier material (Fig. 5) the expansive Endabsohnitt 15 is compressed more strongly within the annular space 11 and thereby leaves even more tree for further upsetting of the pin in the area of the convex section 16 »

- Expectations -

/ Ö0

Claims (2)

Claims 1. Retaining element for attaching a hollow push-button male part with a bottom flange and a pin open at the top and bottom with a substantially cylindrical Wall that inclines inward near the upper end, runs, characterized in that by an inwardly deformed neck part (14) an outward widening end portion (15) is formed at the free open end of the pin, as well as below the enlarged end section a convex area (16), which reduced a zone compared to axial pressure Represents resistance and is deformable outwards under such axial pressure 2. HaltaBlement according to claim 1, characterized in that that the pin wall (13) is of substantially uniform thickness and that the outer edge (17) of the widening end portion (15) a formed a relatively sharp edge for cutting through the substrate Patent attorney 00 884 3/002 8