Electrical connector shield.

MEMORY

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<td>one</td><td>The invention relates to a shield for an electrical connector, and in particular to a device for providing provide such shielding. There is a growing need for electrical shielding</td>

<td>- 5</td><td>effective for electrical connectors, not only in sophisticated military applications, but also to prevent interference in commercial computer equipment and^v * ζ 9 communications. * · "' It is important that these shields can fabricSa&gt; •</td>

<td>10</td><td>economically with mass production techniques and pue'dar * * *. quickly assemble "in situ" if necessary, for example during installation or operation of the equipment. without the need for specialized assembly tools. "PÓi consequently, the shields must consist of a few parts. * .. *</td>

<td>fifteen</td><td>• · · · · Separate for easy storage and assembly and no rAdeA sitar, for example, accessories, such as joints, para-ianic open coupling A well-known team to provide the shielding for an electrical connector that has a first and a se-</td>

<td>twenty</td><td>second connector members engageable with each other comprises a first and a second housing or boxes, metallic, intended to receive respective connector members, you The first box is located at the back for application with the shielding layer of an armored cable.</td>

<td>25</td><td>One drawback of the team above the &gt;&gt; rite is that It is relatively difficult and expensive to manufacture these metal boxes with closed joints, particularly with · a metal garué so it may be required to provide the necessary shielding feature. In addition, to apply</td>

<td>30</td><td>To send a box to a connecting member requires an emphasis</td>

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extensive, which consumes time and creates a permanent installation, which can be disadvantageous.

According to the invention, the second box is intended to receive the first box when the connector members are mutually coupled, the first box being formed in two parts and comprising a pair of mutually aeoplatable, half bodies to define a cavity receiving the first connector member.

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The half bodies can easily be shaped and made of metal of suitable caliber, while • • • • •. The fact that the faculty of mutual coupling of the media makes it possible also to achieve an enclosure without abieitetas unions, avoiding the need for joints. In addition, the media'cJÚelr te 20 fe te 'fe-,'

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The devices can be mounted quickly on an on-site constipation member, if necessary, while desmont '' ge '' is also relatively easy. ···. *.

Examples of the invention will now be described, with reference to the accompanying drawings, in which:

Figure 1 is an exploded, perspective view of equipment for providing a shield according to the invention, associated with a known electrical connector;

Figure 2 is a perspective view of the shield mounted from the equipment in the connector member;

Figure 3 is a view similar to that of Figure 2, with the connector members engaged;

Figure 4 is a partial sectional view, taken along line 4-4 of Figure 3; Figure 5 is a plan view, in partial section, taken along line 5-5 of Figure 3;

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Figure 6 is a fragmentary view, sectioned on line 6-6 of Figure 3;

Figure 7 is a perspective view of an alternative shield and clamp, mounted on a connector member; and figure 8 is a fragmentary view, in perspective. tiva, of the shield assembly of Figure 7, with another ab.

As shown in particular in Figures I a '· * • · ·

6, the equipment to provide electromagnetic shielding ** · includes a first and a second metal boxes ll and 12&gt;, · · •

respectively, intended to receive the respective connectors, mutually coupled, 13 and 14. ···· * ·

The first box 11 is formed in two parts and * .. ·. · »..

It consists of a pair of half bodies 16 and 17 stamped out of a single piece. The cuvette means comprise respective base walls 18 and 19, from which opposite longitudinal edges rise side walls 21 and 22, respectively, converging backwards, to form respective semi-cylindrical appendices 23 and 24. The side walls 22 of a half body 17 are made with a plurality of flying beams 26, which are raised up from the base 19, and provided with blocking protuberances 27 along with their free ends. the base 1&gt; is of smaller width than the base 18 of the other half body, so that the two half bodies can be assembled by snapping around the connector member 14 with the prc&gt;

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HoJh nAm. 4 of the base of the half-body 16. Projections 30 and 31. of connector positioning are provided on the base 18 of one of the half bodies, at the front end thereof, and separated from it respectively. A tab and appendixes 32 and 33 for positioning the connector are provided in the base 19 of the other half body, erJ &amp; l ·, · ** · front end and spaced apart from it, respectively. * »... *

The second box 12 is punched and shaped.

as a single piece in the form of an inverted channel otea • · · comprises a base 34 from whose longitudinal edges.

• • • • Opposite sidewalls 35 are erected. Mounting flanges 36 are bent outward from the free edges of the sidewalls, and a series of raftered beams extend from the base and sidewalls in CÚifsL. • · · ♦ connector receiving mouth 40, the beams of which are doubled · · · · · · · · k · in reverse so that their free ends are inside the second box 12. Blocking projections 39 are provided together with Free ends of the Swing beams extending from the base 34. A tab 41 for positioning the connector is provided on the back of the base 34.

The contacts of the connector member 13 terminate signal wires 43 of a. shielded cable 44 provided with a shielding layer 45 of braided shielding mesh, and the equipment is preferably provided with a clamp in the form of split metal cylinder 46. An extension tool 47 holds the clamp in an expanded condition. The connector member 14 is a pin collector having pins 49 curved at right angles and welded into openings connected to conductive tracks of a plate 52

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of circuit having a metallic layer 53 of shielding.

The second case 12 is mounted on the connector member 14 holding the flanges 36 against the shield layer 53 of the printed circuit board. Before assembling the first box 11 in the connector member 13 and the cable 44, the split metal cylinder 46 is placed preloaded on the cable 44. Then, the half bodies 16 «y · λ · * ·:

They gather around him. Connector member 13, apply »-.

· · · · · · Positioning the positioning pins 30, 31, 32 and 33 with the «« «· connector member, and the braid 45 moves over them •

appendices 23 and 24. During the movement of meeting the * * half bodies, the flying beams 26 are flexed in sliding application with the side walls 21 of the mediq

9 * · ⁹ · 9 ⁹ body 18 and blocking protrusions 27 remain, alloyed.

• • • • in the openings 28 fitting with elastic jump. Next, the cylindrical ^ Atalic 46 is aligned on the braid covering the appendages and the extension tool 47 is removed from the joint to allow the cylinder 46 to contract by firmly holding the braid against the appendages. So, 3ka first box 11 that hosts the connecting member 13 *

The second housing engages with the second housing, the beams 38 being elastically deformed and the locking protuberances 39 suddenly lodged in the openings 29.

The coupled connector members are effectively shielded by the boxes without the need for joints at the contact surfaces of the boxes. Semi-cylindrical appendices 23 and 24 completely encircle the signal wires to provide effective shielding. The assembly of the boxes in the connector members can be easily carried out in situ "without the need for expensive tools and

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complicated. Disassembly of the box members is also relatively easy.

The coupling surfaces of the boxes, which are left and shaped, can receive a surface treatment that ensures good contact, avoiding the need for a joint.

The shielding can provide an effective protection against the interferences that arise, for example, dQ. ,

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* · T the circuits to earth due to equipment that they work with.

• 4 different outputs of current and electrical discharges, the latter being the cause of the greatest concern • • • in work with computers.

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The shield can have several configurations., • ** 'as for example a first alternative box 56 represents ·· · · τ. · · · Given in Figure 7, and alternative clamping members can · -. &gt; · ». »*.

They include a known spring clip 57 or an upset ring 58, shown in Figure 8.

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