FI89116C - Wiring and procedure for its manufacture - Google Patents

Description

ι 89116

Wire connector and method of making it.

Ledningskoppling ocfarfarande för dess framställning.

The invention relates to a conductor connector comprising a plate-shaped body strip from which a tongue with a tapered shape is extruded and a bend is bent in the vicinity of the base to shorten the tongue. The invention also relates to a method of manufacturing a connector, in which a tongue having a tapered shape is punched out of a plate-like body strip and a bend is bent near the base of the tongue to shorten the tongue so that the tongue can pass through its punching opening.

The conductor connector according to the invention is used in particular for automatically connecting a lacquer-insulated winding wire to an electrical appliance. Such a need for use occurs, for example, in the gas discharge lamp choke connector. It is characteristic of the connector that automatic connection can be performed without having to remove the lacquer insulation of the winding wire before connection.

Such a connector is already known from patent publication SE-427600. The connector shown therein has a tongue punched from the body strip, the edges of which, as well as the edges of the punching opening, are sharpened during punching so that when the winding wire is pulled or pushed between the tongue and the body strip. The tongue used in this known connector is slightly smaller in width than the punching hole in the body strip, which means that when thin winding wires (thinner than 0.25 mm) are connected, the tongue is pushed back into the punching hole, cutting the winding wire. For this reason, with this known connector construction, only winding wires thicker than 0.25 mm can be reliably connected. For this reason, thinner winding wires are connected to the welding rod. Because the welding tips wear during the welding process and insulation waste evaporating from the winding wire is stuck to them, the welding machine requires constant maintenance and cleaning. This results in significant additional costs and quality inequalities. Thin winding wire can also be joined by soldering, but winding wires with high heat resistance must first be mechanically removed, which results in high manufacturing costs.

It is also known to install a winding wire in a narrow gap stamped on a connector metal. This method requires that the gap be fitted separately for each yarn thickness and that the variation in thickness allowed be small. Thus, a separate connector is required for each wire thickness. In this case, several connector tools are needed, which become expensive because the gap must be small and its tolerances are difficult to control (at least for thin threads less than 0.2 mm).

The object of the invention is to eliminate the above-mentioned drawbacks and to provide a conductor connector and its manufacturing method which allow the thickness of the wire to vary, e.g. in the range 0.1 to 1 mm, using only one connector dimension, while eliminating the risk of breaking thin wires and connecting the winding wire without insulation. deletion and fully automatically.

This object is achieved by a wire connector according to the appended claim 1 and a method for manufacturing the same according to the claim.

Compared to the use of the welding method, the connector according to the invention reduces the manufacturing costs of joints of thin wires of less than 0.2 mm by about 30%.

Some embodiments of the invention will now be illustrated with reference to the accompanying drawings, in which Figure 1 shows a top view of a finished connector.

Figure 2 shows a side view of the conductor connector in the preliminary stage of its manufacture when the manufacture is performed in the so-called in the queue tool.

Fig. 2A shows a section taken along the line A-A in Fig. 2.

Fig. 3 shows the finishing step of the manufacture of the wire connector in the queuing tool, and Fig. 3A shows a section taken along the line A-A in Fig. 3.

Fig. 4 shows a side view of the finished conductor connector before the installation of the winding wire, and Fig. 4A shows a section taken along the line A-A in Fig. 4.

Fig. 4B shows a detail of the magnification of Fig. 4A.

Fig. 5 shows a side view of the connector spring after connecting the winding wire, and Fig. 5A shows a section taken along the line A-A in Fig. 5.

Figures 6 and 7 show partial plan views of alternative embodiments of the invention, and Figure 8 shows in cross-section another alternative embodiment of the invention.

Fig. 9 shows a cable connector according to the invention mounted in the terminal housing of an electrical device.

A tongue 2 with a shape tapering towards the tip is stamped out of the plate-shaped body strip 1. A bend is bent near the base of the tongue 2 to shorten the tongue so that the tongue can pass through its stamping opening. In the preliminary stage of manufacture, the cutting and bending of the tongue 2 is performed according to Fig. 2 so that the tongue 2 remains above the plane of the body strip 1.

Figures 3 and 3A show how the insertion tool insert 3 pushes the tongue 2 slightly below the level of the body strip 1 and at the same time the insert 3 and the counterpart 4 press the body strip 1 into thinnings 1.1 (see Fig. 4B), reducing the width B of the stamping opening 2a to prevent the tongue 2 from returning. upper side 1 e.

Figures 4, 4A and 4B show the structure of a finished conductor connector, in which the tongue 2 is pressed against the body strip 1 at its flattening die 1.1 by its own spring force. In the case of flattening stamping 1.1, the tongue 2 is substantially parallel to the plane of the body strip 1, while in the region of the tip portion and the base bend the direction of the tongue differs from the plane direction of the body strip 1. Figure 4B also shows how sharp edges 2.2 are made in the cutting phase on the edges of the tongue and the stamping opening, by means of which electrical contact is made with the insulated winding wire.

Figure 5 shows the installation of the winding wire 5 from the direction of the arrow P so that the yarn 5 while opening the flap, and two sharp cutting edges 2.2 of the winding wire insulation, creating electrical connection. Since the tongue 2 is dimension x wider than the opening li 5 89116 2a, the spring force of the tongue 2 cannot cut even a thin winding wire. The prestressing of the tongue 2 ensures the required contact pressure between the winding wire and the body strip 1.

In the embodiment of Figure 6, fingers 8 are stamped on the edges of the opening 2a, which are bent inwards to narrow the opening 2a.

In the embodiment of Fig. 7, the brackets 10 between the opening 2a and the holes 9 stamped in the body strip 1 are bent towards the opening 2a in order to narrow it.

In the case of Fig. 8, a tongue stamping 2.2 has been made on the tongue 2 so that the tongue 2 has become wider than the opening 2a.

Fig. 9 shows a connector mounted in the body housing 11, in which the connecting cable 7 coming from the outside is mounted between the tongue 6 and the body strip 2. Such an installation method is already known, for example, from FI patent publication 52907.

Claims (4)

1. Conduit coupling piece consisting of a disc-shaped body strip (1), out of which a tongue (2), which has a tapered shape towards its tip and in the vicinity of its base, has a bend to shorten the tongue, characterized in that material of the strip strip (1) or tongue (2) is transmitted to make the punch opening narrower or the tongue (2) wider so that the tongue (2) does not fit to pass through the punch opening and that the tongue (2) is utilized to utilize its spring force. press against the stern strip (1) in the vicinity of the tapering of the aperture or the edges of the widening of the tongue. A method for producing a conduit coupling piece according to claim 1, in which a method is cut from a disc-shaped body strip (1), a tongue (2) having a tapered shape towards its tip, and in the vicinity of the base of the tongue a bend is bent to shorten the tongue. said that it is capable of passing through its punching opening, and at the same time the tongue (2) bends out from the plane (1) of the body strip, characterized in that the tongue (2) is swung through the punching opening to the opposite side of the body strip (1) against the spring force of the tongue and at the same time, material is transferred by the stem strip (1) or the tongue (2) to narrow the punch opening or the tongue wider so that the tongue (2) does not fit back through the punch opening, but remains to press against the stem strip while retaining its spring force. Method according to Claim 2, characterized in that said material transfer is made by flattening punching either on the body strip (1) near the edges of the opening or on the tongue (2). Method according to claim 3, characterized in that, during the flattening punch (1.1), the tongue (2) extends substantially in the direction of the path of the streamer (1), and on both sides thereof or near the base and tip of the tongue (2). deviating from the direction of the strip strip (1).