FI74840C - Connection terminal for uncollection-free connection of electrical wiring to telecommunication devices, especially with distributors of call switching devices. - Google Patents

Description

74840

Connecting clamp for peel-free connection of electrical cables in splitters for telecommunication devices, especially telephone exchanges

The invention relates to a connecting pin for peeling electrical cables peel-free in splitters of telecommunication devices, in particular telephone transmission devices, which connecting pin consists of two longitudinally separated and rigidly connected spring arms at one end. in one piece of metallic strip material and the spring arms are separated in the fastening area by cutting.

Such a connecting clamp is known, for example, from DE publication 12 32 232. Due to its structure, this type of connecting clamp is simple to manufacture. The disadvantage, however, is that the connecting clamp thus formed does not in practice often meet the high requirements for contact safety.

The object of the present invention is to improve a connecting clamp of the type mentioned at the beginning so that, while the connecting clamp is simple to manufacture, the high requirements for contact safety are met.

This task is solved by placing the spring arms transversely perpendicular to the longitudinal direction about a bending plane in the plane of the connecting clamp with respect to each other so that the spring arms are displaced at the outer end of the fastening area by a predetermined amount relative to each other.

By crossing both spring arms, the connecting clamp according to the invention also meets the high requirements for contact safety, while at the same time it can be manufactured simply and at low cost. When the cable is inserted, the 2 74840 spring arms cut into the wire and are thus secured in this position. The grooves formed in the shear are displaced by a small distance due to the cross-alignment of both spring arms. If the cable is now pushed further downwards to its final position, the spring arms will be twisted so that an additional torque is present which substantially improves the contact properties of the connecting clamp according to the invention.

Other preferred embodiments of the connecting clamp according to the invention are set out in the subclaims and in the following description of exemplary embodiments.

Exemplary embodiments and a method of operation of the connecting clamp according to the invention are described in more detail below with reference to the drawing. In the drawing, Fig. 1 shows a perspective view of a simple connection pin according to the invention, Fig. 2 shows a side view of this simple connection pin, Fig. 3 shows a perspective view of a double connection point according to the invention, Figs. 4-12 show different states of a simple connection pin

The simple connecting clamp 1 shown in Figs. -hole 2. This mounting area is made by simple separating cutting. In this case, the connection between the two fixing jaws 3 and 4 takes place in the form of a brush, which is crucial for the operation of the connection pin according to the invention. As a result of this brushing, the peeling edges 6 and 7 of the fastening jaws 3 and 4 are spaced apart at their ends facing the fastening side 5.

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Figure 3 shows a double junction clamp for connecting two insulated electrical wires according to the present invention. This double connection clamp 8 is made in principle in the same way as the simple connection clamp shown in Figures 1 and 2, however, here two separating cuts per pin are required. A tongue 9 protrudes between the two fixing jaws 10 and 11, which is rigidly connected at its free end with the non-free ends of both fixing jaws 10 and 11. The double connection pin has two longitudinal holes 12 and 13 and two mounting sides 14 and 15, between each of which there are mounting areas. Both peeling edges of the fastening area are then formed in each case from one edge of the second fastening jaw 10 and 11 and from the other edge of the tongue 9. Also in this embodiment of the connecting clamp according to the invention, the peel edges of the two fastening areas are spaced apart at their respective ends facing the respective fastening side.

Figures 4-13 will now explain the operation of the connecting clamp according to the invention. In this case, Figs. 4, 6, 8 and 10 show a front view of the connecting pin 1 and Figs. 5, 7, 9 and 11 show a top view or cross-sectional view of the connecting pin 11 at the height of the power line, while Fig.

The electrical wire 14 inserted through the chamfer selected in the connection pin 1 of the mounting side 5 slightly presses the connection pin 1 before the electrical wire 14 reaches the shell edges 6 and 7 with its insulation 15 (see Fig. 4). When the electric wire 14 is pressed between the peel edges 6 and 7 (see Fig. 6-9), the peel edges cut into the wire 16 and secure both fixing jaws 3 and 4 in this position. Since the fixing jaws 3 and 4 are placed crosswise with respect to each other in the cutting operation - as described above - both grooves provided by the peeling edges 6 and 7 in the guide 16 are displaced at a distance a.

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If the electric wire 14 is now pressed along the stripping edges 6 and 7, which are fastened by grooves in the wire 16 to this wire 16, in its final position in the fastening area, i.e. shortly before the longitudinal hole 2 (see Fig. 10-12), the contact pressure of both fixing jaws 3 and 4 on the line 16 is strengthened because the distance between the electric line 14 and the closed lower end of the longitudinal hole is reduced.

By passing the electric cable 14 to the connection point 1, the peeling edges 6 and 7 turn to the side due to the rigid connection of both fixing jaws 3 and 4 below the longitudinal hole 2. At the same time, due to the predetermined brushing of the peel edges 6 and 7, one of the peel edges 6 and 7 pivots forward relative to the plane of the connecting pin 1, while one of these peel edges 6 and 7 pivots backwards. Thus, at a certain angle with respect to the plane of the connecting pin 1, a wedge-shaped gap delimited by the peel edges 6 and 7 is formed, which widens towards the fastening side 5. This gap causes both fixing jaws 3 and 4 to warp, so that the fixing jaws 3 and 4 are subjected to an additional torque p. The grooves in the line 16 thus form additional steps which form an additional contact surface on the outside.

By brushing the spring arms, the contact surfaces formed by the separating cut can be galvanically supplied with contact substances, e.g. Agr or Sn. The simple connecting clamps or, as the case may be, the double connecting clamps according to the invention act - as extended from the base - as separation or coupling springs in the distributor components.

Claims (4)

74840 1. A connecting pin for peeling electrical wires freely in strip distributors of telecommunication devices, in particular telephone transmission devices, which connecting pin consists of two longitudinally separated and rigidly connected spring arms at one end, the spring arms are separated in the fastening area by cutting, characterized in that the spring arms are arranged perpendicular to each other vertically about a longitudinal direction around a bending edge in the plane of the connecting pin (1) so that the spring arms are offset from each other by a predetermined amount outside the fastening area. Connecting clamp according to Claim 1, characterized in that a tongue (9) is arranged between the two spring arms, which in each case delimits the fastening area and the longitudinal hole (12, 13) with the second spring arm, and that the spring arms are arranged vertically vertically with respect to the connecting clamp. 8) around the bending edge running in the plane with respect to the tongue (9) so that the spring arms are displaced at the outer ends of the fastening areas by a predetermined amount with respect to the tongue (9). Connecting clamp according to Claim 1 or 2, characterized in that the fastening mouth is formed in the part adjacent to the fastening area (3, 4; 6, 7) in a parabolic shape. Connecting clamp according to one of the preceding claims, characterized in that the contact surfaces are coated in the fastening area with contact substances (e.g. Ag or Sn). 74840