MXPA98001240A - A conta spring - Google Patents

Abstract

A conetacot spring consisting of a longitudinal spring means in one piece in accordance with the following. A first portion of the body essentially molded as a belt (22) extends along the longitudinal direction of the spring means. A second portion of the body (24) extending along and at a distance from the first portion of the belt (22) and connected thereto by means of arcuate connecting pieces (26) extending from a first edge lateral of one of the portions of the body towards a first adjacent lateral edge of the other portion of the body. The first contact tongues (32) are bent from the first lateral edge of the second portion of the body (22) in the direction of the other portion of the body and ends between the planes of the two portions of the body. The second contact portions (34) are bent from the first lateral edge of the first body portion (22) in the direction of the other portion of the body and terminate outside the plane of the second portion of the body. The third contact tongues (36) are bent from the other lateral edge of the first portion of the body (22) in the outward direction of the two portions of the body.

Description

A CONTACT SPRING Technical area The present invention relates generally to a contact spring consisting of a longitudinal spring means for use in particular in an electrical optical circuit.

An electrical optical circuit is known to comprise optical emitter and receiver components for the transformation of an electrical output signal into an emitted electrical signal and for the transformation of an optical signal received into an electrical input signal respectively; connection means for an opto conductor on which the optical output and received signals are transmitted; a sender for the electrical output signal and a receiver for the electrical input signal.

Electric optical circuits of this nature are used, for example, located on a printed circuit chart on a telecommunication switch. Each circuit chart carries a plurality of these electrical optical circuits and in the switch one or more boxes may contain a plurality of protected letter magazines, each of which contains a plurality of circuit cards. To increase the insensitivity to EMC, that is, electromagnetic disturbance radiation, shippers and receivers are conventionally located far away on the cards as seen from their edge located on the outer box wall, below the front of the box. On the front of the chart are seated a number of connection devices for connecting an outer opto conductor of two opto conductors guiding the sender and the receiver respectively, of a corresponding sender / receiver pair. To minimize the risk of interference between the sender and receiver of each sender / receiver pair, the sender and receiver are located remotely from each other on the chart.

This distribution of the components of the electric optical circuit counteracts an effort for a more compact architecture of switches of the type just described, while the insensitivity by the EMC is saved or improved, as well as the ESO, that is, electro discharges static To be careful with this, it was advantageous that the individual circuit forms a module with an electromagnetically protected housing containing the sending and receiving optical components and the connecting means for the opto conductor and that a two-sided printed circuit distribution carries the sender and the receiver located protected from each other on one side, each by means of an electrically conducting protection that is in connection with the housing to form three boxes of Faraday, one for the sender, one for the receiver and one formed of the accommodation in its entirety.

In a distribution of the aforementioned type, it is essential that an intimate contact is maintained between the grounding parts of the housing parts by the contact means taking as little space as possible.

State of the Art EP-124701 discloses a device for making contact with printed circuit boards inserted into brackets, in particular to provide connection to the ground between a housing and the printed circuit board. This includes a spring clip that surrounds the edge of the printed circuit board and is provided with hook type extensions that join the contact surfaces of the printed circuit board and that when the printed circuit board is inserted into the bracket it is They are in electrical contact with this.

EP-447942 describes a contact protrusion of metallic material for fitting over the edge of an element of the metal wall in order to provide a firm connection of interference radiation. The contact projection has a row of individual contact tongues that are not stamped and are bent out of the plane of the contact projection at a distance from each other, and a row of individual clamp elements distributed at a distance from the one to the other along their lengths.

Compendium of the invention An object of the invention is to provide a contact spring consisting of a longitudinal spring means which is simple and inexpensive to manufacture, and particularly that can be used as a contact spring module of which an amount can be used to make contact between the parts that make ground in an electro-optical circuit of nature that was previously exposed.

This object was made so that the longitudinal medium is molded in one piece with: a first core portion essentially molded as a belt extending along the longitudinal direction of the spring means, a second portion of the core extending along and at a distance from the first portion of the core and which is connected thereto by means of arcuate connection pieces extending from a first lateral edge of one of the portions of the core towards a first adjacent lateral edge of the other portion of the core, the first contact tongues bend from the first lateral edge of the second portion of the soul in a direction towards the second portion of the core and ending between the planes of the two portions of the soul, the second contact tongues bend arcuately from the first lateral edge of the first portion of the core in a direction towards the second portion of the core and ending outside the plane of the second portion of the core, the third contact tongues being bent from the second lateral edge of the first portion of the core in an outward direction from the two portions of the core.

Description of the Drawings The invention will now be described more closely with reference to the accompanying drawings, in which: Figure 1 is a perspective view of a housing for an electrical optical circuit mounted on a printed motherboard chart.

Figure 2 shows a scanned view of the housing shown in Figure 1 with the parts thereof, as well as the components enclosed by it that are shown in perspective.

Figure 3 shows a perspective view of a contact spring module according to the invention used in the housing and intended to be used between the different elements, forming parts of the housing according to Figure 1, a printed circuit board introduced in the accommodation and the mother letter.

Figures 4 and 5 show sections in the direction of the arrows IV-IV in Figure 3, through the contact spring module for an illustration cooperation thereof with elements shown in Figure 3.

Figure 6 shows a perspective view of the housing for a contact means 5.

Figure 7 shows a scanned view of a housing shown in Figure 6 with parts thereof, as well as a housing enclosed therein in perspective.

Figure 8 shows a perspective view of a component enclosed in the housing in accordance with Figures ß and 7 and with a turn of 90 ° opposite the clock in the same plane as the corresponding perspective view in Figure 7.

Figure 9 shows a perspective view of the same component as in Figure 8, although with a 180 ° turn about an elongated axis with respect to the perspective view corresponding to the perspective view in Figure 7.

Fig. 10 shows a longitudinal section of another component enclosed in the housing according to Fig. 7.

Preferred Modality Figure 1 shows the housing for an electric optical circuit according to the invention, generally designated 2, and mounted on a motherboard 4. The housing 2, whose design appears more closely from Figure 2, contains the connecting means in the form of a housing ß with a receiver tube 7 for receiving one end of an opto conductor. The opto conductor is fixedly retained by a connection device generally designated with the 8 and received in an opening in a part of the guide, generally designated with the 9. The connection device 8 will be described more closely below.

The housing 6 contains an electrical optical component which is not shown and comprises parts of the optical component dispenser and receiver for transforming an electrical output signal into an optical output signal, and for transforming an opto-received signal into an electrical signal of entry respectively. The parts of the sender component and the optical receiver can be combined into one unit, for example, Duplex-2 from ABB HAFO, which supports the use of a single opto fiber to transfer in both directions to and from the electrical optical component.

The housing 2 also encloses a distribution of printed circuit board 10 on which the housing 6 is attached. The distribution of the printed circuit board 10 is in the form of a letter 10 of the printed circuit of the sender / receiver and therefore is, for simplicity's sake, termed "printed circuit letter" or alternatively, "printed letter from the sending / receiving circuit" despite the fact that, as described below, it may consist of a sandwich of two printed circuit cards. The printed letter of the circuit 10 on one side carries a sending circuit for the electrical output signal and on the other side a receiving circuit for the electrical input signal. The circuits are indicated for the highest part of the card in 12 and for the lower side of the card with an arrow 13, but they are not shown more closely for the rest. The chart 10 also carries connections, which are not shown, between the inputs and outputs of the sender and receiver circuits respectively; on the one hand, and connection clips 14 on the other side, which extend through the housing towards the outside thereof for the connection of external circuits on the motherboard 4.

The housing 2 has a lower part 16 and a higher part 18, both metal parts each comprising the half of 9a and 9b respectively, of the guide in part 9. Between the lower part or lower part 16 and upper part or higher 18, the printed letter of the sender / receiver circuit 10 is located; the housing contains the contact means which is described more closely below, between the parts of the housing and between the housing and the grounding parts of the printed letter of the sender / receiver circuit 10 and the outer card 4 respectively. As will become clearer below, the grounding parts of the motherboard are part of a metallic layer applied to the chart in parallel with the two laterals and between these two laterals of the letter company of the circuit. The printed circuit letter 10 may then consist of a single printed circuit chart in which the metallic layer is formed by a conductive layer integrated between the sides of the card. However, the printed circuit letter 10 may be a sandwich type composed of two printed circuit boards connected together side by side through the metal layer. The metallic layer may also include a magnetic material, for example, in the form of a nickel plate for protection against inductive cross induction. By means of the design of the housing 2 described above, three Faraday boxes are formed. Each of two boxes encloses one of the circuits 12 and 13 of the shipper and the receiver respectively, one consisting of the lower part 16 of the housing and the metallic layer of the printed letter of the circuit 10, and the other consisting of the upper part 18. of the housing and the metallic layer of the printed circuit letter. The third box is housing 2 in its entirety.

The aforementioned contact means consists of a quantity of longitudinal spring means 20 along the sides of the housing parts 16 and 18. Each spring means 20 is made in one piece and comprises a number of contact points for the printed letter of the receiver / sender circuit 10, a number of contact points for the upper part of the housing 18 and a number of contact points for the motherboard 4.

Each spring means comprises a first core portion essentially in the form of a projection 22 extending along the longitudinal direction of the spring means. A second part of the core 24 extends along and at a distance from the first part of the core 22 and is connected thereto by means of arcuate connecting pieces 26 extending from a first lateral edge 28 of the first part of the core to a first near lateral edge 30 of the second part of the core. The first contact tongues 32 are bent away from the first lateral edge 30 of the second part of the core in a direction towards the first part of the core 22 and the end between the planes of the two parts of the core. The second contact tongues 34 are bent arcuately away from the first lateral edge 28 of the first part of the core 22 in an outward direction of the two parts of the core. Each of the third contact tongues 36 has an inner leg 38 bent outwardly from the first part of the core 22 and an outer leg 40 connected thereto and bent outwardly from the inner leg to form an acute angle between the two legs .

The part of the core 22 extends between the interior of the side wall 42 raised from the lower wall of the lower part 16 and an opposite lateral edge 44 of the printed letter of the sending / receiving circuit 10. The part of the core 24 extends between the exterior of the side wall 42 of the bottom part and the interior of an interior wall 46 extending downwardly from the top wall of the top part 18. The contact tongues 32 are located in contact with the exterior of the side wall 42 of the lower part 16. The contact tongues 34 are located in contact with the interior of the side wall 46 of the upper part of the housing 18.

The contact tongues 36 extend between the grounding parts and are limited to these, not shown, on the lower side of the printed letter of the sending / receiving circuit 10 and the upper side of the mother card 4. The inner leg 38 of each contact tongue 36 has an upper side formed with a contact projection 48 which makes contact with the grounding part of the printed letter of the sending / receiving circuit 10. The outer leg 40 makes contact with the grounding part. of the mother card 4. In Figures 4 and 5 the aforementioned inner metallic layer of the letter 10 is indicated at 50, as well as the outer continuation of the same 52, which extends outwardly on the edge 28 of the letter 10 towards its lower side to form the part that touches the earth of the letter 10 there.

In Figures 6-10 one embodiment of the connecting device 8 is illustrated more closely with respect to its design and function, which is intended to connect one end of a covered opto fiber 60 to the electrical opto component enclosed in the housing 6.

The connecting device 8 includes, while particularly referring to Figure 7, a retainer sleeve generally designed 62 for a portion of the fiber that is connected to the end of the opto fiber optic 60, a support structure, generally designated 64 for the retainer sleeve 62 provided to be fixed with respect to the electrical opto component so that it is more closely disclosed below, and a spring 66 acting between retainer sleeve 62 and support structure 64. More particularly, the spring 66 should compensating the tolerance in the direction along the retainer sleeve 62 with respect to the electric opto component in the connection with the optoelectric component in the housing 6.

In a manner to be described more closely below, the spring 66 and the support structure 64 are mutually molded to first admit the insertion of the retainer sleeve 62 with the covered fiber 60 conserved by means of this in the direction of the arrow 68 in front of the spring 66 that can be inserted thereon in the direction of arrow 70 and conforms to dotted lines 72 and 74 laterally in the support structure.

The spring 66 is made in a piece of two legs of the spring 16 and 18 bent in a V-shape and placed in parallel and joined together at the end of the leg of the respective V by means of the ties 80 and 82 respectively. On the location in the support structure 64 the spring 66 straddles the retainer sleeve 62 with the V-shaped spring legs 76 and 78 on each side thereof and commonly acting between a contiguity 84 on the sleeve 62 that it extends around the circumference of the sleeve 62 and a contiguity 86 in the support structure.

The support structure 64 is essentially box-shaped and comprises, while referring to Figures 7-9, a passage for the retainer sleeve 62 which extends in the direction of the arrow 68. This passage includes, in turn, in the direction of the arrow 68, a hole 88 located in an end wall 90, a hole 92 located in an intermediate wall 94, and an end hole 96, which is located at the other end of the structure 64 with respect to the end wall 90. The end wall 90 and the intermediate wall 94 delimit each upper edge as seen in Figures 7 and 9, together with the side walls 98 and 100 extending therebetween; a side hole opening toward the passage for inserting the spring 66 in the direction of the arrow 70. As shown in Figure 9 the contiguity 86 is located in this side hole on the side of the end wall 90 facing 1 side hole .

When the spring 66 is located in the support structure 64 it is retained in place by the edge of the V of the respective V-shaped spring portions 76 and 78 loosening below the free end 102 and 104 respectively, of each tongue 106 and 108 respectively, the legs of the spring portions 76 and 78 facing the wall 94 then limit the contiguity 84 of the sleeve 62 on each of the sides of the sleeve, and the attachment 82 of the spring 66 limits the contiguity 86 The contiguity 84, which according to is located between the walls 90 and 94, forms a side of a radial extension from the sleeve,; the other side 110 of which by connection with the intermediate wall 94 delimits the movement of the sleeve 62 in the direction of the arrow 68. The movement of the sleeve 62 in the other direction is limited by the connection of the spring 66 with the same . In Figure 10 the locations for the contiguity 86 and the intermediate wall 95 with respect to the sleeve 94 are indicated when the sleeve is in its position mounted on the support structure 6.

Also with reference to Figure 10, the sleeve is assembled in the manner shown, of two mutually concentric parts, viz. a conservative fiber in the part 112 and a guide fiber in the part 114. Both parts 112 and 114 have essentially the bottle shape with a neck portion 116 and 118 respectively, and a mantle portion 120 and 122 respectively with a base open, the mantle portion 122 carries the radial extension 84/110. The mantle portion 120 is further surrounded by a collar 124 that extends outwardly from its base edge and is essentially the same length as the mantle portion 120 and extends parallel thereto, so as to demarcate the gap therebetween, , the width of which is somewhat larger than the thickness of the mantle portion 122 of the part 114. the parts 112 and 114 are interconnected with the open end portion of the mantle portion 122 that extends into the recess 126 .

The neck portion 116 of a part 112 serves to hold the covered fiber 60, which is not shown in Figure 10, which extends upwardly from the mouth 128 of the neck portion 118 abuttingly in its place. with a width corresponding to the thickness of the opto fiber without coating.

When mounting the sleeve 62 with the opto fiber 60 fixedly seated thereon, it is carried out by first pulling a suitable length of the opto-coated fiber through the neck portion 116 and hugging it into the neck portion 116 by means of a suitable clamp tool. Then the part of the opto fiber that extends outside the neck portion 116 is cut to a length that is greater than the distance between the outer ends of the neck portions 116 and 118 when the sleeve 62 is already assembled. After, the end opto fiber is discovered by removing an adequate length of its mantle, glue is applied on an end portion of the mantle portion 122 turned from its neck portion 118, and this end is inserted into the recess 126 toward the base of the same. This is done while simultaneously ensuring that the end of the discovered fiber is guided towards the mouth 128, so that it will at least exit therefrom. The thus projecting end is then cut along the end surface at the neck portion 118.

A conceivable and advantageous alternative to the embodiment of the sleeve 62 shown in re 10 and described above is that the part 114 is replaced by a layer directly sprayed on the part 112 and the covered opto fiber embraced therein and which has the same contour of part 122 when it is required. The part 112 then suitably modifies so that the collar 124 disappears.

The parts 62-66 are disengaged and mutually molded so that in their already assembled state, the support structure 64 surrounds the sleeve 62 essentially on a portion thereof extending from the rear end of the sleeve 62 to the transition between mantle portion 122 and neck portion 118.

The parts 62-66 are enclosed in an outer housing with an adapter sleeve tube 130 joined thereto in one piece, through which the coated opto fiber 60 is guided in the sleeve 62. The housing is shown in re 7 as divided into an upper housing half 132 and a lower housing half 134, which are shown in re 6 in a state mounted by means of screw connections 136 and 138. In res 1 and 2 the same view of the device connection 8 is shown as in re 6. On the ears 140 and 142 extending from each of the halves of the housing 132 and 134 respectively, they are shown containing screw holes. With reference also to res 1 and 2 the upper part 18 and the lower part 16 of the housing 2 have ears 144 and 146 which extend correspondingly, with screw holes. The ears 140 and 144 which are provided with holes with a screw passing through them, on one side, and the ears 142 and 146 are provided with holes with a screw passing through them on the other hand; each forms a screw joint, for joining, according to the dotted lines 148 and 150 respectively; the contact device 8 with the housing 2, with the housing 130/132 guided in the part of the guide 9. In this position the mouth 128 of the sleeve 62 in the housing 6 is in a correct position with respect to the optical component electrical enclosed in it. The receiver tube 7 then extends in the support structure 64 approximately to its intermediate wall 94; the tolerance of the retainer sleeve 62 in its long direction with respect to the electrical optical component is lifted by the spring 66.

Claims (7)

1. A contact spring consisting of a longitudinal spring means is characterized in that the spring means is molded in one piece with; a first core portion essentially molded as a belt (22) extending along the longitudinal direction of the spring means, a second portion of the core (24) extending along and at a distance from the first portion of the core (22) and is unitized therewith by means of arcuate connecting pieces (26) extending from a first lateral edge from one of the portions of the soul to a first adjacent lateral edge of the other portion of the core, the first contact tongues (32) bent from the first lateral edge of the second portion of the core (22) in one direction towards the second portion of the core and ending between the planes of the two portions of the core, the second contact tongues ( 34) arcuately bent from the first lateral edge of the first portion of the web (22) in a direction towards the second portion of the web and ending outside the plane of the second web portion, the third contact tongues (36) bent from the second lateral edge of the first portion of the core (22) in an outward direction of the two portions of the core.

2. A contact spring according to claim 1, characterized in that a first (32) and a second (34) contact tongue are pairs placed in spaces between the arcuate connecting pieces (26) between the portions of the core ( 22, 24).

3. A contact spring according to claim 2, characterized in that each of the third contact tongues (36) has a first inner leg (38) bent outwardly from the first portion of the core (22) and one leg outer (40) connecting to this and bent outwardly from the inner leg to form an acute angle between the two legs.

4. A device in an electrical optical circuit that is characterized in that, the electrical optical circuit forms a module with an electro-magnetically protected housing (2) containing a double printed circuit distribution of double circuit (10) that carries circuit components located protected from each other on each side by means of a protection of electrically conducting (50) which is in connection with the housing (2), the contact means (22) are provided between the housing (2) and the grounding portions of the printed circuit layout (10); the protection between the sender and the receiver, and a printed letter of the external circuit (4) on which the module can be attached, the housing (2) has a lower portion (16) and an upper portion (18) between which the printed circuit distribution of the circuit (10) is located, and the contact means comprises a number of longitudinal spring means (22) along the interior of the housing parts; each one molded in one piece and has a number of points and contact (48) for the distribution of the printed circuit letter (10); a number of contact points (32) for the lower portion (16.42); a number of contact points (34) for the upper portion (18, (46) and a number of contact points (40) for the printed outer circle chart (4).

5. A device according to claim 4, characterized in that each spring means is molded in one piece with: a first portion of the web (22) extending along the longitudinal direction of the spring means between the inside of a side wall extending around (42) of the bottom part (16) and a side edge (44) ) in front of this side wall of the distribution of the printed circuit board (10), a second portion of the core (24) that extends between the outside of the side wall (42) of the bottom part (16) and the interior of the side wall extending around (42) of the upper portion (18), first contact tongues (32) bent from an upper edge of the second portion of the core (24) to make contact with the exterior of the side wall (42) of the lower portion (16), second contact tongues (34) bent from an upper edge of the first portion of the core (22) to make contact with the interior of the side wall (46) of the upper portion (18), third contact languages (36) that limit and extend between the grounding portions (4) of the printed circuit distribution of the circuit (10) and the printed letter of the outer circuit.

6. A device according to claim 5, characterized in that the first (22) and the second (24) portion of the core are interconnected by means of arcuate connecting pieces (26) that extend over the side wall (42) of the lower portion (16) and that a first (32) and second (34) contact tongue are pairs distributed in spaces between the connecting pieces (26).

7. A device according to claim 5 or 6, characterized in that each of the third contact languages (36) has an inner leg (38) bent from the first portion of the core (22) between the distribution of the letter printed circuit (10) and the printed letter of the outer circuit (4) and the upper side that is molded to make contact with the grounding portion of the distribution printed circuit (10) and an outer leg (40) which is bent from the inner leg at an acute angle towards the printed letter of the outer circuit (4) to make contact with the grounding portion thereof.