CZ311592A3 - electrical connector with sealed passage of conductors - Google Patents

Abstract

Electrical connector suitable for cars incorporating a body (12) insulating material, providing passages for mounting contacts (16) each having a conductor (18). Body (12) the contents are also a rear grommet (36) made of elastomer with at least two rows of individual passes (14) for the conductors (18) and held by the perforated plate (28), removably attached to the body (12). Each passage through the grommet comprising at least one sealing flap (26) whose shape in the resting position, it is adapted to close the corresponding one individual passage not occupied by conductor (18) wherein the grommet is held in place by the perforated plate (28).

Description

Technical field

FIELD OF THE INVENTION The invention relates to electrical connectors comprising an insulating body provided with contact receiving openings each having connection wires and rear elastomeric bushings provided with at least one row of individual conductor passages (and typically at least two rows side by side) and maintained by a plate connectable with the body exchangeable,

BACKGROUND OF THE INVENTION

Such connectors are currently widely used. Numerous applications, for example in automobiles, require that the connectors be waterproof so that contaminating fluids cannot penetrate between the conductors on the one hand, the conductors and the insulating body on the other.

One currently widely used solution for impermeability is to pour polymeric material in the back of the grommet or to replace the grommet. However, this solution gives a non-detachable connector, which is disadvantageous. One solution that allows the contact and the contact with the insulated conductor to be removed and exchanged is that there are no tangential cross-sections in the bulkhead. However, where it is desirable to use vehicles, some points of the individual passages form a sealing ring bend.

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SUMMARY OF THE INVENTION The present invention aims to provide an electrical connector of the type described above that would better meet these requirements than previously known. Mainly in that they allow both dismountability and tightness, especially when some places are unoccupied with contacts and conductors.

In order to solve this problem, the invention is based on the finding that there are now contacts which have non-corrosive front ends, i.e. plugs into the mouth of the grommet, whose cross section at rest is slightly smaller than the cross section of the contact. In particular, reference may be made to a squeegee contact of this type as described in EP-A-0 310437 and wherein the front ends consist of two sides formed by folds and where the edges of the two remaining sides are at rest with respect to the folds. This is a cake contact, the slats to be inserted into the squeegee contact as described in document EP-A-0 310437 having a chamfer _t r * £ * 5 Ú Γ * 1 2Γ 3 Π U

SUMMARY OF THE INVENTION

Thus, the present invention provides a connector of the type described above, wherein each passage of the grommet comprises at least one sealing flap whose rest shape is such that it closes the corresponding individual passage not occupied by the conductor while the grommet is held by the plate. The essence of the invention is also that recesses are left in the grommet to ram the elastomer from the son-in-law surrounding the flaps when these flaps are pressed against the conductor.

Another object of the invention is that the insert is a rigid insert having lateral sides for lateral insertion from one side and the other side of the rows and for laterally pressing the elastomeric material and that for each space between two rows the insert is provided with a transverse insert. arranged in the grommet half the distance between the two rows, the thickness of the lateral sides and partitions being proportional to the distance between the sealing flaps that occupy the passages so that the flaps are closed again in the absence of conductors and left in the grommet to the zones surrounding the flaps when these flaps are pressed against the conductor.

The recesses left in the grommets include from the right

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c * / 5z zc szze nas i ecu 'i z imz change2CMoc.v z /.z.zz.e 5 ~ ra? .y z zz z z z'z z z and z z.? z z z e z e z z z z e z. In the ranks of the Jews of several rows, these are cut out especially in the middle of the rectangle, which correspond to the axes of four adjacent passages for years.

The material of the elastomer is chosen to be sufficiently shaped so that the opposing portions of the flaps are impermeable to each other and that the material deformed by the presence of a large diameter conductor can be poured into the recess. In practice, the elastomer will usually be below 40

Shore.

One such arrangement to reconcile conflicting urgent requirements is demountability; if it is necessary to increase the contact placement step, the magnification is small and only in one direction. In practice, connectors with up to six rows of contacts are produced without particular difficulty.

If the plate is a flat perforated insert, the grommet may be prepared so that the contacts provided with its conductors are inserted after the grommet is placed in the body, but before the perforation of the perforated insert. It can also be prepared so that the contacts can be fitted with the location of the grommet and the insert.

The recesses left in the grommet may be different.

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all > o n r n cases z i skanka o i i known way may be bečme h walls bushings to the interior radia 1 mm pres i sknutim. Plate spirit perforated de stičkou holding bushings below t1akem,

in a simple way.

secured by pressing ni on the body wall, i.

if it is made up of a single skin, it shall be treated to ensure tightness.

When the cavities -cooking cavities are formed in the side baffles of the grommet, the tightness can be ensured by pressing against the body of the plane of one or several ribs with which the grommet is provided around the set of passages.

The tightness between the grommet and the body may also be achieved by pressing against the body of the plane of one or more ribs formed on the grommet around the set of passages. Keeping the ribs in the thrust may be provided by the bottom of the plate provided with means for engaging the body.

The invention will be better understood from the description and drawings of a particular exemplary embodiment of the invention, but is not limited thereto.

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;.; e * r. ou ficu ξ ζ.οιη'ό. <racA ™,; r?: 5? z. <;r; e / .tcr; ep T í £ 7 QI '-' - ^r W 3 L - ¹ S ti. O i? and P 3 C ii 'd £ Τ Q H' · ^r * 3 monosubstituted, grommet according to the embodiment applicable to the connector of FIG two rows of passages shown in the free state. Fig. 3 shows the bushing of Fig. 2 and the rigid associated plate in cross section along line III-III of Fig. 2. Fig. 4 is a cross-sectional view of Fig. 2 taken along line IV-IV in Fig. 2; Fig. 5 is similar to Fig. 3 and shows a bushing according to one variant of the embodiment of the invention, wherein the flaps close the passages, particularly in an unoccupied state. Figures 5 and 7, similar to Figure 3, are similar embodiments of the grommet; Figure 3 is a rear view of the grommet of Figure 6. FIGS. 9 and 10, similar to FIG. 2, and in section along the line λ-λ, show yet another embodiment. Fig. Li represents a connector with two rows of contact locations. This is a simplified cross-sectional view of a plane perpendicular to the rows, wherein the connector is provided with a bushing according to another embodiment of the invention. Fig. 12 is a rear view of a grommet according to an exemplary embodiment of the invention applicable to the connector of Fig. 1 with two rows of two passages drawn in an unoccupied state. Fig. 13 shows the bushing of Fig. 12 and the rigid associated plate in cross section: -x:

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DETAILED DESCRIPTION OF THE INVENTION

The connector shown in FIG. 1 has an essentially classical construction. It is intended to be coupled to an additional connector, the end portion of which is shown in dashed lines.

This connector 10 comprises a body 12 of electrically insulating material which is provided with passages 14 into which contacts 16 are inserted, each of which is equipped with a connecting conductor 12. In the case shown in FIG. 1, the connector body comprises two rows of passages 14, but this number is not limiting. These passageways are intended to be fitted with contacts that are non-corrosive at the front ends and free of protruding sharp edges. The drawn contacts are socket contacts, the construction of which is described in EP-A-0 210487. These contacts are cage-shaped and have holes for a retaining pin. 20, supported by a resilient thumb 20 which is part of the body and is held in place by the front plate 18. The contacts will also be of the roller type and be formed by tongues or slats having front ends tapered as shown on the front of FIG.

The invention can also be used for other types of contacts and other types of connectors, in particular for connectors whose insulating body is housed in a sheath of material other than that of the bodies.

The rear part of the body, which in the drawing case has a thickness less than the thickness of the part containing the contacts and the transition between the conductors 13 and the contacts 16, holds a sealing bushing 24 provided with individual passages for each conductor 13 also divided into rows corresponding to each one of the passages of the insulating body.

The bushing according to the exemplary embodiment of the invention shown in Figures 2 to 5 is particularly useful when the contacts have a front wall of approximately square shape. It consists of a piece of flexible elastomer, usually with a lower hardness of up to 40 Shore, made by pressing. Each of the passages for insertion of the conductor has a loop shape or a rectangular elongated cross-sectional shape with the undulations forming the flaps 26, in the illustrated case in the number of two. These flaps have a depth h substantially greater than the depth used on the conventional grommets for a given step between the passages. At rest, each flap defines an orifice of diameter d small enough to reseal the flap itself and to provide tightness in the absence of a conductor when the grommet is deformed by inserting a rear rigid plate 23, which will be described below,

In order to insert the conductors having a much larger diameter than the diameter d of the mouth at rest into at least some of the passages, recesses are provided in the passage. In the cases shown in Fig. 2a 4, these recesses include zones on one side on the other hand, wide cut-outs 32 arranged in the insulator between successive passages of one and the same row.

The impermeability between the body 12 and the grommet 24 can be ensured in various ways. In the case shown in FIG. 3, this is done by a flat support: the grommet 22 comprises one circumferential rib 38 (not limited thereto) intended to be supported on the body surface 36.

The impermeability can also be well ensured by a simple lateral grommet.

A bushing having the shape shown in section in FIG. 3 would be sufficient to provide tightness between the bushing and the conductors of at least d diameter. Conversely, passages not occupied by the conductor would allow the entry of impurities. These passages are closed when the rigid plate 23 of axial compression of the grommet and the pressing of the flaps are inserted into the body 12. This plate 23 is provided with means for hanging on the body. In the case shown in Figures 2 and 5, these means are formed by one or more pins 42 which engage in holes provided in the body. The positioning of the openings is such that when the plate 28 is engaged, the ribs 28 press against the body support surface and ensure tightness between the body and the grommet. This positioning is also such that the elastomer is pressed again to close the unoccupied openings.

The recess provided in the grommet allows the conductor 15 to occupy the grommet to deform the elastomer and fill the cavities to release the necessary cross-section as shown in FIG. 1,

In practice, it is generally possible to insert wires whose diameter is at most equal to the diameter D of the half height of the flaps 26.

The spacing of the passage spacing in the same row may be equal to the spacing usually used in flaps with flaps. Conversely, it may be advantageous to adjust the pitch spacing slightly larger between the rows.

For example, it can be determined that the grommet according to the embodiment shown in Figs. 2 and 4, when the contacts are inserted prior to the placement of the rigid plate, can be provided with contacts having a maximum cross-section of lx • Λ mm. 5 mm in a row, mm with spacing spacing rnm between rows, measured at rest even mm.

2 and 4, a difficulty cross section can be made by casting longitudinally from the molding.

The embodiment shown in Fig. 5 differs practically from the embodiment shown in Fig. 2 only by the resting shape of the sealing flaps, these flaps defining a simple narrow groove. This arrangement is particularly advantageous in the case of tongue or lamella pin contacts or squeegee contacts of rectangular longitudinal cross-section.

The embodiment shown in FIG. 6 (where parts corresponding to those already described with the same reference numeral a) is distinguished from the embodiment of FIGS. 2-4 by having a cavity 46 forming a recess on the right side of each rib. for filling with elastomer. Similarly, the cavities 45 are arranged in the side walls of the grommets from both sides of the rows. The disadvantage of this bushing, except that the center bar is left, is that it can only be made in eighth with the transverse slide

7 and 3, the semicircular cavities 46 and 48 of FIG. 6 are replaced by the cavities in the coin and the coin in the plane of the plane of approximately the same thickness,

All of the examples of the invention described heretofore have been designed to accommodate the same contacts 16, the embodiment shown in FIGS. 9 and 10 makes it possible to accommodate contacts having two different widths in the connector. 9 and 10 (where parts corresponding to those previously described are designated with the same reference numeral with the letter c) comprising two rows, each of three passages. The width of the connector is much greater than that of the conductor, the grommet being equipped with a flange 34 on which a tubular partition extending the rigid plate can rest.

The connector of FIG. 11 is of a comparable design to that of FIG. 1 and the corresponding parts are designated by the same reference numerals plus 100.

The bushing according to the embodiment of FIGS. 12 and 15 still consists of a piece of flexible flexible elastomer. Each of the passages intended to be fitted with a swiveling conductor with undulations forms flaps 126, in the illustrated case two flaps. These flaps still have a depth h somewhat greater than the depth of conventional bushings, for the spacing step given between the passes. In the rest position, each flap defines one orifice of diameter d sufficiently small such that the flap closes itself again and flushes in tightness when the conductor is unoccupied when the grommet is deformed by insertion of the rigid plate 12 '. whose shape and function will be described below.

A constant thickness gauge 130 is arranged in the elastomer at the center of each interval separating the two rows of passages. To permit the insertion of conductors of larger diameter than the diameter d of the orifice in the rest state, at least some of the passages, the diameter d in the rest position of the orifice of the holes are provided in the recess in the recess. 12 and 15, the recesses comprise, on one side, a rear zone between the flaps 12, and on the other side a wide cutout 132 arranged in the insulator between successive passages of one and the same row.

The tightness between the body 112 and the bushing 124 is provided by a support surface. To this end, the bushing 125 comprises a flange 13.1 which is supported on the body support surface 13o and which is provided with one circumferential rib 133 (this number is not limiting).

A grommet having the shape shown in the cross-section of the figure would be sufficient to ensure tightness between the grommet and the wires with a diameter greater than d. Conversely, passages unoccupied with the wires would present the possibility of impurities entering. According to the invention, these passages are closed when the rigid insert 123 for pushing the flaps is inserted into the body 112. This insert consists of a bottom carrying four parallel sides: walls 14 intended to be inserted from both sides of the rows, between the body 112 and bushing 12. The insert 123 is provided with means for hanging on the body. 13 and 15, these means are formed by one or more spurs 142 which engage in apertures formed in the body. The location of the aperture is such that the insert 125, in the retracted state, pushes the rim 154 onto the body support face and provides a seal between the body and the grommet.

The liner 128 also includes a partition 144 parallel to the lateral sides and is intended to be inserted into each slot 130. The thickness of the partition 144 is greater than the thickness of the groove 130 at rest. The thickness of the lateral sides and baffle is proportional to the thickness of the groove 130 and the flap shape 126 so that the elastomer is pushed to close the missing conductor holes as shown in the upper portion of Figure 15.

The recesses provided in the grommet allow the conductor 115 to occupy the grommet to deform the elastomer and fill the recess and to release the necessary cross-section, as shown at the bottom of Figure 15.

In practice, the presence of recesses or cavities allows the placement of conductors whose diameter is greater than the diameter p of the flaps 12, as shown in Figure 13, but does not substantially exceed the diameter of the flaps.

The step of placing the passages in the same row may be equal to the step usually used in the passages = flaps, and vice versa, it is necessary to adjust the step spacing between the rows slightly larger.

By way of example, it can be shown that the throughput as shown in FIGS. 12 to 15 can be designed to accommodate conductors c having a maximum diameter of 2.7 mm.

with step split passages, which j e r oven 5 mm h řa 6, 6 mm between rows with diameter U 511 in calm i mm. Bushing as shown 1 ena on Fig. 12 and 14, can apartment made without difficulty pouring with pode 1nym from

forming.

An example of a similar embodiment shown in FIG.

(where the corresponding parts are indicated with the same reference numeral and the letter a) differ from the embodiment of Figs. 12 and 14, in that the slot 130a does not have a constant width but has a cavity 14o on the right side of each flap forming part recessed for filling In a similar manner, cavities 148 are arranged in the side sheaths from one side of the rows.

17 and 18, the semicircular cavities 146 and 148 of FIG. 6 are replaced by coin-shaped cavities that give an approximately constant depth of elastomer in a plane perpendicular to the rows.

While up to positive all of the described variants ”; the pleats are intended to accommodate the same contacts 115, the variant of Figs. 19 and 20 allows to fit in the same. connector with two different widths. The bushing 12c shown in FIGS. 19 and > 0 even where parts corresponding to the frequently described ones are indicated by the same reference numeral with the letter cj comprising two rows of three passes each. In each row, the two passages are separated by a larger step than the step separating the third pass, which is also narrower than the other two passages. 19 and 20 may be extended to a plurality of passages in each row or to a number of enlarged rows.

Claims (9)

PATENT REQUIREMENTS c4 <? C / g SOclt <Eu \ y Electrical connector crfs wires: from body to body provided with conductor contact passages and comprising an elastomer back bushing with at least two rows of units . you cr. The guide passageway and the retained raincoat plate are fixed at a fixed load, wherein each passageway passage comprises at least one sealing flap whose rest shape is such that it closes a corresponding a single passage not occupied by the conductor, while the passage is held by an apertured plate, leaving in the passage recessed elastomer packed from the zones surrounding the flaps as these flaps rest against the conductor. 1 n e b o 2 That recess includes cavities (40) disposed between the passages of the row of the row 2. The electrical connector of claim 1, wherein the plate comprises a rigid insert (123) provided with two lateral sides (140) for laterally sliding from either side of the crayfish or row and for laterally compressing the elastomer and for each gap therebetween. 120, 130a, 120b) arranged in the bushing at half the distance between the two rows, the thickness of the lateral sides i, 140) and the possible rungs C 144 1 is defined by the distances defined by the sealing flap 18, including 2 6, 12 and 1 of 6 b, 126 c to clear passages and notch distances, and to close the flap on itself in the absence of conductors, while irradiators are left recessed for ramming the elastomer away from the zones surrounding the flaps when the flaps are supported by the conductor and when the rigid insert is inserted. 3. The electrical connector according to item 1, characterized in that the elastomeric material has a hardness of less than 40 Corps 4. The electrical connector of item 1, wherein the grommet comprises at least one rib (30, 38a, 38b, 36c) for supporting the flat on the body surface around the set of passages. Electrical connector according to claim 1 or 2, characterized in that it comprises means (42) for suspending the rigid plate (28) on the body in a position in which it sufficiently compresses the conductor to close all the flaps. O. The electrical connector of claim 1, or wherein the recesses retained in the bushing include zones between flaps of the same passage and cutout (32) between rows. point or point 7. An electric generator according to any of the above. The punchings comprise zones or sidecut C32ί between successive passages from each side of the corresponding row. 8. The electrical connector according to the point is three, 9. The electrical connector of claim S, wherein the cavities (4c) have a tax shape so that the grommet is almost constant in a plane perpendicular to the rows. lu. Electrical connector according to claim 2, characterized in that the recesses comprise cavities (46) disposed in the slit or slots.