DE2362143A1 - Multi-tier rotary stepping switch for printed circuit module - has pairs of facing etched wafer surfaces with staggered contact - Google Patents

Abstract

Multi-tier rotary stepping switch is for printed circuit modules. The wafers are formed by printed circuit boards with a number of etched contact ends terminating along the circumference of a circle. The wiper is part of a ring or section of a ring depending on the number of poles per wafer. Each switching tier is formed by two similar printed circuit boards with the etched surfaces facing each other. One wafer contact ring serves both printed circuit boards, each containing half the total number of switch contacts. The positions of the contacts of the two boards are staggered relative to each other so that any contact on one board will be opposite the gap between two consecutive contacts on the other board.

Description

standard Elektrik'Lorenz AG -, OQR Ί 1 / ο Stuttgart

¥. Rosi: 17 ■

Multi-step rotary switch for printed circuits.

The invention relates to a multi-step turning " switch for installation in printed circuits, - its _-. Schalterebeneη consist of printed circuit boards whose η .printed step contacts with η one-sided outwards, "led printed connections are connected and one after the other via the contact bridge of a rotor with a printed contact ring or contact ring segment "in electrical Can be linked. -

In the case of a rotary switch, its switch levels are off. Printed circuit boards exist, it is known that the conductor tracks leading to the printed contact parts are all on one side: to let the circuit board end, so that the switch with its circuit boards inserted into Einstecköffhungen a printed circuit board and the protruding connections can be soldered economically in the immersion process can. The number of led out on one side of the switch level Connections is determined by the number of printed contact parts arranged on the printed circuit board level, the step contacts, determined. Since the printed step contacts are arranged in a circle on the switch level. are brought and a printed one of each step contact

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Conductor track is routed to one and the same side of the switch level, the width and height of the bracket level and thus of the switch depend on the number of step contacts used. In many cases, for example when installing a switch in printed circuits, The arrangement of other components and elements set certain limits to the dimensions of the switch, especially with regard to its width and height. There is a requirement for installation in printed circuits in which the internal corner openings are in a grid-like arrangement with a grid spacing of 2.5 mm for a built-in element that is as flat and narrow as possible.

He keeps well-known Hehrfaeii-otuf endrehä e for installation in printed circuits, their printed so-holder levels up to 24 printed step contacts and thus on the Λη-end side Carrying up to 24 connections arranged next to one another, can meet the requirement of flat and narrow ones Components for installation in printed circuits no longer have to be fulfilled.

The invention is therefore based on the object of a multi-step relay holder for installation in printed To create circuits with particularly small dimensions hinsi hurries borrowed its construction height and width manufacturable is and also enables an efficient mass production of its individual parts. This task will in the case of a multi-fadi rotary switch of the type mentioned at the beginning Kind of the invention is solved by the fact that the Switch levels made up of two identical opposing printed circuit boards with n / 2 printed step contacts each, n / 2 printed connectors and one printed

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Contact ring or contact ring segment are built up, dab the otufenkontakt the one circuit board in the Gaps in the step contacts on the other circuit board are arranged and dai3 the step contacts alternately from one circuit board to the other with its associated contact ring or contact ring segment electrically connected to ground. The well-known Multiple rotary switches for installation in printed Circuits usually arranged on a circuit board contact parts are therefore according to the invention distributed on two circuit boards. This is done in such a way that in one example 24 step contacts carrying circuit board each 12 .cjtu-. fenkontakte arranged on a circuit board in this way are, there are 12 contacts on one circuit board when there are two opposing circuit boards lie in the gaps of the 12 step contacts on the other circuit board. This alternates between one to the other circuit board a total of 24 step contacts switched. '.

In the case of multi-step rotary switches for installation in printed circuits, it is known (DT-PS 1 287 185), two parallel to each other To assemble printed circuit boards zu.einer structural unit, between which one carrying the movable contact parts Contact piece is stored. However, in the known case, there are two opposite each other Contact parts of these circuit boards are electrically connected to one another by the movable contact part or separated from each other. The movable contact part consists for example of a U-shaped

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Contact bracket, the U-web of which is in a corresponding recess of the movable switching piece, the rotor, is held in a rotationally secure manner and the free ends of which are provided with embossed contacts. This U-shaped contact clip accordingly switches in each case on two opposite printed circuit boards arranged contact parts these circuit boards. The known solution is therefore unable to achieve the object on which the invention is based to solve.

The particular advantage of the invention is to be seen in the fact that in multi-step rotary switches for the Installation in printed circuits with a relatively large number of step contacts the width, and The overall height of the switch can be kept much smaller than in the known cases. So devoted For example, 24 step contacts on a printed circuit board, 24 connections on one side with a grid dimension of 2.54 mm with known multi-step rotary switches. In contrast, in the embodiment according to the invention only half of these connections, i.e. in the example only 12 connections on one Side of the circuit board arranged in the grid. The invention also offers the advantage that by the Distribution of the step contacts on two circuit boards, the electrical load capacity and the service life each switch level is increased significantly, since only half of the in the on each circuit board known cases - arranged on a circuit board Step contacts used; isir. As in the embodiment according to the invention each switch level

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on the whole by the printed circuit method can be produced, the advantage of a rational mass production remains compared to the known Cases received. .

According to an advantageous further development of the invention each printed circuit board has an opening to accommodate a double-sided switching rotor, which is in an opening , one under spring action in the axial direction Carries double contact bridge, the contact surfaces of which are arranged mirror-symmetrically in the radial direction, The use of a double contact bridge in which the individual bridges are not electrically isolated from one another must be, since alternating from one circuit board to the other is switched, results in the possibility of a rational mass production. So it can be more beneficial Further development of the invention, the double contact bridge can be formed from two flat, TT-shaped, identical individual bridges, which are mirror-symmetrical Arrangement with the formation of a common opening, for receiving a helical spring generating the contact pressure, opposite one another and optionally means have for guiding the helical spring. These individual bridges can be produced using a stamping process and can be easily mounted in the rotor.

The invention will be explained in more detail with reference to the drawing, in which, for better illustration, an embodiment of the invention is compared to the prior art- " is posed. Show it:

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FIG. 1 shows a plan view of a switch level for one. Multi-step rotary switch according to the stand of the technique;

Figure 2 the circuit board of a switch level for.

a multi-step rotary switch according to the invention compared to the prior art according to Figure 1;

Figures 3 and 4 show the arrangement in a schematic representation of the circuit boards of a switch level for a multi-step rotary switch according to the invention;

FIG. 5 shows, in section, a complete switch level for a multi-step rotary switch according to the invention for making the switching rotor visible and the moving contact parts.

The switch level shown in FIG. 1 for a multi-step rotary switch according to the prior art consists of the circuit board 1 with 24 step contacts 2, a contact ring 3, and the connections 4, 5. The step contacts 2, the contact ring 3 and the connections 4, 5 are produced using the printed circuit method. For the sake of simplicity, these items are therefore referred to below as "printed" step contacts 2, “Printed” contact ring 3 and “printed” connections 4, 5, which are in the form of conductor tracks, are designated. The printed connections 4 assigned to the step contacts 2 and the printed connections assigned to the contact ring 3 Terminal 5 all end on one side of the circuit board 1 and are arranged there in a grid with a spacing of 2.54 mm. By one not shown

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Rotor, taken from the breakthrough 6 of the circuit board 1 on is, the printed step contacts 2 can be "moveable" via one or more rotor-supported ones Contact parts are electrically connected to the contact ring 3 one after the other. How without further ado Figure 1 can be seen, the dimensions of the circuit board 1 and thus the width and height of the associated Multi-step rotary switch by the number of the step contacts used.

In FIG. 2, 1 is the printed circuit board according to the prior art that can be seen from FIG. 1, and 10 denotes the printed circuit board used in the multi-step rotary switch according to the invention. The dashed lines in FIG. 2 indicate the size ratios between that in the embodiment according to FIG Invention used circuit board and in a multi-step rotary switch according to the prior art used circuit board clearly. It can be easily seen below that the multi-step rotary switch according to the invention both in terms of its width and its overall height smaller dimensions having. ■ '-. "....." "

The switch level of a multiple step switch according to the invention consists of two identical, each other opposite circuit boards 10, 20. When η desired. Carries step contacts for a switch level each of these circuit boards has n / 2 printed step contacts 11, 21, n / 2 printed connections 12, 13, 22 ,. 23 and

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a printed contact ring 14> 24 The step contacts 11, 21 are arranged on the circuit board 10, 20 in such a way that the step contacts 11 of one circuit board 10 are arranged in the gaps of the step contacts 12 of the other circuit board 20 when both circuit boards are opposite one another and the printed organs of both circuit boards face each other. When producing the circuit board 10, 20 ', care must therefore be taken that the step contacts 11 and 21 are not arranged symmetrically with respect to the center lines shown in FIGS after completely identical circuit boards can be used. In particular, Figure 4 by the second circuit board 20 is used simply in relation to the first printed circuit board 10 in a 180 ° -um the vertical center axis rotated position makes it clear ä & ti the switch plane 30 from zv / ei completely identical circuit boards 10 can be constructed 20.

So that the step contacts 11, 21 alternate from one to the other circuit board 10, 20 with their "associated" Contact ring 14, 24 can be electrically connected, each circuit board has an opening 15> · 25 for receiving a double-sided switching rotor 40. This rotor carries a in an opening 41 in the axial direction under spring action double contact bridge 50, which consists of two flat, U-shaped, the same individual bridges 51, 52 is formed. The two individual bridges 5t, 52 are located in the opening 41 of the Rotor 40 in a mirror-symmetrical arrangement below

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Formation of a common opening 42 for receiving a coil spring 60 generating the contact pressure opposite one another. The contact surfaces of the individual bridges that extend in the radial direction 51, 52 are thus also arranged mirror-symmetrically to one another, so that the step contacts: 11, 21 alternating from one to the other circuit board 10, 20 through these contact surfaces with their associated Contact ring 14, 24 are switched can. For better guidance of the coil spring The two individual bridges 51, 52 can have guide means, as is known per se. In the from Figure 5 apparent switching position of the double contact bridge 50 connects this one step contact. 11 with the contact ring H of the circuit board 10, while the single bridge 52 is just on the gap between the step contacts 21 of the circuit board 20 lies and only with the contact ring 24 of this ■ Circuit board is electrically connected.

Since the power supply in the embodiment according to the invention via the printed connection 13 of the associated contact ring 14 takes place and such a power connection also on the circuit board is arranged, certain measures must be taken, the connection diagram, the installation of the Multi-step rotary switch used printed Circuit board adapt. Depending on the number of desired switch positions or the number the desired pole is a certain conductor path on the printed circuit .der mounting plate necessary.

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List of reference signs

1 5 20th Circuit board 2 21 Step contact 3 13, 22 Contact ring 4, 24 Connection 6th 25th breakthrough 10, Circuit board 11 Step contact 12, Connection H, 50 Contact ring 15, 52 Breakthrough 30th Switch level 40 rotor 41 common opening 42, Double contact "bridge 51, Single bridge 60 Coil spring

3 claims
2 sheets of drawings

5-0 8826/0041

Claims (2)

Claims Multi-step rotary switch for installation in printed Circuits whose switch levels are made from printed circuit boards "exist whose η printed step contacts with η printed connections leading outwards on one side are connected and one after the other via the contact bridge of a rotor with a printed contact ring or Contact ring segment brought into electrical connection can be, thereby g e k e η η ζ e i suspects that the switch levels (30) each consist of two identical, opposing printed circuit boards (10, 20) each with n / 2 printed step contacts (11, 21), n / 2 printed connections (12, 13 »22) and one printed contact ring (14, 24) or contact ring segment are constructed that the step contacts of the one Circuit board are arranged in the gaps of the step contacts of the other circuit board / and that the step contacts alternating from one circuit board to the other with its associated contact ring or Kontaktrihgse.gment can be electrically connected. · 2.). Step switch according to claim 1,. characterized, that each circuit board (10, 20) has an opening (15, 25) for receiving a double-sided switching rotor (40) which in an opening (41) has a double contact bridge under the effect of leather in the axial direction (50) whose contact surfaces are arranged mirror-symmetrically in the radial direction. 509 8 28/00 41 3.) Step switch according to claim 2, characterized in that the double contact bridge (50) consists of two flat, TJ-shaped, identical individual prints (51, 52)
which are opposite one another in a mirror-symmetrical arrangement, forming a common opening (42) for receiving a helical spring (60) generating the contact pressure. Kb / on - 10.12.1973 09828/00 L e r s e i t e