DE1006975B - Contact spring set for relay or the like. - Google Patents

Description

GERMAN

The invention relates to contact spring sets for relays, switches or the like. To these contact spring sets To ensure the required contact pressure, the contact springs must be pretensioned be. The preload must be particularly important in the case of spring sets for relays in telecommunications and telephony, which must provide reliable contact despite the low switching capacity, must be set very precisely. Up to now, this setting has generally been carried out on the layered contact spring set or by means of precise information Adjusting the individual contact springs. But there is also the option of using the contact springs preload or deform before layering together so that they are after the assembly of the contact spring set in cooperation with the mating contacts or other external support points required preload. The subsequent adjustment of the layered contact spring set requires a lot of assembly time. The pretensioning of the contact springs before they are layered however, requires a special pretensioning device and possibly a particularly careful one Storage of loose springs.

Although it is already known to save the actual adjustment work in that to build the Contact spring sets wedge-shaped intermediate layers are used. In this known stratification is but it is not possible to achieve a preload without additional components or support elements. For this purpose, special counter supports are required. The invention has the task of these counter-faces, the manufacturing and assembly-wise the effort for the manufacture of contact spring sets to combine with the liners. According to the invention, this is achieved by that the mutually braced insulating pieces both fastening and counter-position of the contact springs form. Due to the specially designed insulating intermediate layers, it is therefore possible to use the To bring stacked contact springs not only in a predetermined position, but also an insulating one To create counter-support for the contact springs. Of course, the mostly disc-shaped ones have to be Insulating pieces for this purpose can be produced in a very form-fitting and fitting manner. But this is off Plastic pressed or injection-molded insulating washers can be achieved because the compression or injection molds are to be provided only once or only in very small numbers and are therefore manufactured extremely precisely can be and then to press or to press molded parts that are completely true to size and are identical to each other Allow injections.

Several exemplary embodiments of the invention are shown in the drawing.

Contact spring set for relays or the like.

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Witteisbacherplatz 4

Josef Fischer, Alois Ruhland

and Werner Lindner, Munich,

have been named as inventors

Fig. 1 shows in a side view, partially in section, how a thin spring sheet metal contact spring 1 is inserted between two insulating plates 2 and 3, the plate 2 having a protruding nose 2 _a for supporting the spring 1. The lower plate 2 has on its upper side projecting pins 4, 4 ₀ of the upper plate 3 fit into corresponding beads and serve to fix the contact springs and the insulating discs 2, 3 with each other. The section shown is at the point where the spring 1 passes behind the pin 4. The left end I _{0 of} the spring serves as a soldering eye for the electrical connection of the contact. The spring between the mating surfaces of the insulating plates 2 and 3, seen from the left, run horizontally and are then beveled downwards from point 5, so that the spring 1 is bent downwards when the insulating plates are stacked and receives a certain preload.

The embodiment according to FIG. 1 a is essentially the same as that of FIG. 1, but in this case the surfaces of the plates 2 and 3 that engage between them are flat and generally beveled, so that, in contrast to FIG. 1, the l solder lugs protrude _a correspondingly obliquely from the contact spring assembly. The angle a by which the spring 1 must be bent away from the center line in order to obtain a certain contact pressure can be calculated precisely for a given spring from the values f _E , L _n , F and L given in FIG.

Fig. 3 shows a layered set of springs with a changeover contact. Of the three required for this Springs 6, 7 and 8 lie the lower and the upper

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Spring with bias on the supporting edge 6 'or 8' of the underlying insulating plate 6 _a or 8 _tt , while the middle spring 7 with the contact 7 _a on it rests against the corresponding mating contact of the spring 6 with bias. The spring 7 is extended to the right and is lifted there in a manner not shown by the relay armature directly or via intermediate links when the relay is energized, so that it moves away from the contact of the spring 6 and against the upper contact of the spring 8. The latter stands out from the supporting edge 8 ', with its bias determining the contact pressure.

FIG. 4 shows another embodiment with contact springs 6 to 8 which are pretensioned alternately. The middle spring engages through the plate 12 arranged on the relay armature, which when it is moved upwards switches the contact.

Since the insulating plates 6 _a to 9 _a are supported on each other after they have been stacked and clamped together, the bending stresses that occur on the support roller are eliminated. With the great accuracy with which the pressed or injection-molded insulating plates from pressing material or thermoplastics come out of the mold, a very precise alignment of the contact springs to the actuating plate 12 can be achieved.

5 shows, in a front view, an example with two sets of contact springs lying next to one another in a layer plane. With only two differently shaped plates, several changeover, working or break contacts can be connected to the, for example, in Fig. 6 shown contact spring set are summarized, which then subsequently by a tubular rivet or a screw connection 13 is firmly clamped.

The centering of the springs within the spring set as well as between the individual insulating washers can also be achieved by means of differently shaped centering means as shown in FIGS. 1 and la can be achieved. Likewise, the bias of the Feather-causing surfaces instead of just being curved or also have certain approaches, which the spring from its perpendicular to the construction center line of the contact spring set Bend the position in the direction of the desired preload. As the insulating pieces generally go through Presses or syringes are made from plastic, they are also in complicated form using to obtain great uniformity and accuracy from the form, which can only be produced once.

Claims (4)

Patent claims: 1. Contact spring set for relays or the like, in which the contact springs are stacked between one another and braced against each other are braced insulating pieces, characterized in that that the mutually braced insulating pieces both fastening and counter-position the feathers form. 2. Contact spring set according to claim 1, characterized in that the contact springs between mating surfaces of the insulating pieces from a perpendicular to the construction axis of the Contact spring set running level in the direction of the preload to be given to the springs are curved or inclined. 3. Contact spring set according to claim 1 or 2, characterized in that the springs between The surfaces of the insulating pieces covering each other approximately up to the construction axis of the layered one Spring set run perpendicular to this and from there inclined or curved. 4. Contact spring set according to claim 1, 2 or 3, characterized in that the springs between capturing surfaces of the insulating pieces centering lugs, z. B. in corresponding wells the opposite surface matching pins for the springs and the insulating pieces exhibit among each other. Considered publications:
German patent specification No. 379 682. 1 sheet of drawings © 709 5Mß49 4.57