EP3994779A1

EP3994779A1 - Electromagnetic shielding device

Info

Publication number: EP3994779A1
Application number: EP20735578.5A
Authority: EP
Inventors: Clément DOUSTEYSSIER; Ryan Christian GRAY
Original assignee: Delfingen FR Anteuil SA
Current assignee: Delfingen Industry
Priority date: 2019-07-02
Filing date: 2020-06-30
Publication date: 2022-05-11
Also published as: WO2021001384A1; CN114009159A; KR20220029720A; MX2021015580A; JP2022538650A

Abstract

The present invention relates to an electromagnetic shielding device (40) comprising at least one hollow textile protective sheath (50) having a mean diameter at rest D1 and an inner volume configured to receive one or more elongate elements (20, 21), at least one hollow textile connection sheath (60) having a diameter at rest D2, D2 being greater than D1. The textile protective sheath (50) comprises a substantially annular front portion (52) having an open front end (54), the textile connection sheath (60) comprising a substantially annular rear portion (62) having an open rear end (64), and the shielding device (40) comprises a first electrically conductive securing zone (70), in particular at least partially annular, in which the rear portion (62) of the connection sheath (60) and the front portion (52) of the protective sheath (50) are at least partially secured.

Description

ELECTROMAGNETIC SHIELDING DEVICE

Technical area

The present invention relates to an electromagnetic shielding device of the textile electromagnetic shielding sheath type.

Another subject of the present invention is a method for manufacturing an electromagnetic shielding device as well as a device for transmitting electrical energy comprising an electromagnetic shielding device.

Prior art

It is known to use electromagnetic shielding sheaths to protect mechanically and against electromagnetic interference the electric cables arranged in the internal volume of these sheaths and in connection at least one of their ends with an electrical connector, as well as for protect the external environment of these shielding sheaths from electromagnetic disturbances likely to be generated by the electrical cables enclosed in these shielding sheaths. These sheaths are made of electrically conductive metal wires, and cover, by means of at least one of their ends, an electrical connector provided with a grounding region. The dimensions of these sheaths must therefore be adapted to the electric cables and to the connector (s), which have very different dimensions. These sheaths can thus be deformable, in particular capable of expanding radially, to cover at least part of the connector and in particular said earthing zone, or have a sufficient diameter at rest, that is to say greater or equal to the largest external dimension of the connector. Said sheaths must also be configured to allow an electrical connection with the grounding zone, the latter generally being carried out by welding between the sheath and the grounding zone or by a tightening means tight around the sheath. at least partially covering the grounding area of the connector.

However, the entirely metallic shielding sheaths have the drawbacks that they do not expand radially, or very little and with difficulty, so that shielding sheaths have been proposed which mix metal wires and plastic wires in order to give them properties of radial expansion.

However, when a sheath is in the expanded state in operation, that is to say when it protects the electric cables and partially covers one or more connectors, it does not fully perform its shielding and shielding functions. protection against external mechanical attacks due to its expanded network which has large openings and therefore smaller areas of contact with the elements to be protected. In addition, all-metal sheaths are expensive, and have a high weight.

Furthermore, the electrical cable or cables to be protected and any connectors to which these cables are connected do not have the same external dimensions, the size of the connectors being generally greater than that of the cables. Thus, it is possible to use a shielding sheath selected so as to have a diameter sufficient to cover the connector, which diameter will be much larger than that necessary to receive the electric cables connected to the connector. The amount of shielding sheath protecting the cables is therefore excessive, thus resulting in a greater mass compared to that which would be necessary to mechanically protect the electric cables and against electromagnetic interference. However, these shielding sheaths can be used in the field of transport, for example automobile, in particular for electric or hybrid cars, for which precisely the optimization of their weight is essential because impacting their energy consumption. It is also possible to use a radially deformable shielding sheath so that the diameter of the latter at rest is adapted to the external diameter occupied by the electric cables, and that it is in the expanded state when it covers the connector. However, as mentioned above, the part of the expanded sheath does not correctly fulfill its role of shielding. In addition, it can be complex to have a shielding sheath having an appropriate diameter to cover the cables, and capable of expanding sufficiently to cover a connector.

US 2013/0068518 A1 thus relates to an electromagnetic shielding sheath, one open end of which is folded back on itself and capable of expanding radially. In order that the expanded terminal part retains shielding properties equivalent to those provided by the remainder of the sheath, the terminal part is folded back on itself, the folded internal part being disposed freely, and not expanded, against the part.

expanded external. The shielding sheath must however be chosen so that it can expand sufficiently to be able to cover the connector. The arrangement of the folded part with a free internal part is tedious to implement. In addition, even though the fold-back arrangement makes it possible to improve the preservation of the shielding properties, too much expansion risks opening up the textile structure of the expanded outer part too much to the detriment of the shielding performance.

Disclosure of the invention

An object of the present invention is to provide a shielding device whose shielding properties and mechanical protection function are similar at rest. (ie not fitted) and in operation, while optimizing the mass of the shielding device.

An aim of the present invention is to provide a shielding device that is simple to use and which adapts to the dimensions of the electric cables and of the connector (s) with which they are linked.

The present invention overcomes all or part of the aforementioned problems in that it relates, according to a first aspect, to an electromagnetic shielding device comprising:

at. At least one protective hollow textile sheath having a main diameter at rest DI and an internal volume configured to receive one or more elongated element (s),

b. At least one hollow textile connecting sheath having a diameter at rest D2, D2 being greater than Dl, the protective textile sheath comprises a substantially annular front part having an open front end, the connecting textile sheath comprises a substantially annular rear part having an open rear end, and said shielding device comprises a first electrically conductive connection zone, in particular at least partially annular, in which the rear part of the connection sheath and the front part of the protective sheath are secured to the less in part.

Advantageously, the shielding device comprises two textile sheaths having distinct diameters at rest but assembled at the level of one of their annular ends, so that the diameter of the connection sheath is adapted to the size of the connector independently of the diameter of the protective sheath, adapted for its part to the elongated elements to be protected. The size of the shielding device is therefore adapted to the connector (s) and to the elongated elements in a differentiated manner over its length, which makes it possible to adjust the weight of the device. In addition, advantageously, the body of the protective sheath in the extension of its annular front part, has a diameter at rest D1 corresponding substantially to its diameter in operation. Thus, when this protective sheath receives elongated elements to be protected, the body is not in the expanded state and maintains its shielding and mechanical protection properties. The same technical effect can be observed for the connection sheath. The diameter of the body of the connection sheath in the extension of its annular rear part may be approximately of the order of D2 in operation, or expand to adapt to the shape of the connector as described below.

Advantageously, the connection between the rear part of the connection sheath and the front part of the protective sheath is configured so that it is electrically conductive. Electricity is thus conducted from the protective sheath towards the connection sheath passing through the first joining zone, and vice versa.

In one embodiment, the shielding device comprises a second hollow textile connecting sheath having a diameter at rest D3, D3 being greater than D1, in particular D3 is of the order of D2 or different from D2. The second connection sheath comprises a substantially annular rear portion having an open rear end, the protective sheath comprises a substantially annular rear portion having an open rear end. The shielding device comprises a second electrically conductive joining zone, in particular at least partially annular, in which the rear part of the second connection sheath and the rear part of the protective sheath are at least partially joined.

The diameter at rest D1 is measured outside the front part of the protective sheath, on the body of the protective sheath projecting from the substantially annular front part, in particular between the substantially annular front and rear parts.

The diameter at rest D2 (or D3) is measured outside the substantially annular rear part disposed in the first joining zone, (or in the second joining zone), on the body of the connection sheath. D2 (or D3) is / are measured in particular between the substantially annular front and rear parts of the (first or second) connection sheath.

The (first or second) connection sheath comprises an interior volume opening into the interior volume of the protective sheath.

Preferably, the (first and / or second) connection sheath (s) and / or said at least one protective sheath is / are configured to expand radially, and this in a reversible manner, so that their diameter (s) at rest is (are) increased.

The said elongate element (s) is / are preferably one or more electric cables, and optionally optical fibers.

The connector (s) to which the elongate element (s) is / are connected, may / may have a round, oval, square, rectangular, or any other form necessary for the desired connection.

The (external) diameter (Dl) of the protective sheath is preferably greater than or equal to 3 mm, and less than or equal to 120 mm, more preferably greater than or equal to 5 mm and less than or equal to 100 mm.

The diameter (s) (external (s)) (D2, D3) of the connection sheath (s) is / are preferably greater than or equal / equal to 3 mm, and less than (s) or equal / equal to 120 mm, more preferably greater than or equal / equal to 20 mm and less than or equal / equal to 100 mm. The length of the protective sheath depends on the length of the electric cable (s) to be protected.

The length of the protective sheath is preferably greater than or equal to 10 cm, and less than or equal to 10 meters.

The length of the connection sheath depends on the length of the connector to be partially covered. The length of the connection sheath is preferably greater than or equal to 3 cm, and less than or equal to 50 cm, for example less than or equal to 40 cm or 15 cm, in particular less than or equal to 10 cm.

In one embodiment, the diameter D2 of the connection sheath is greater than or equal to 1.10 times, preferably 1.20 times, more preferably 1.30 times, than the diameter DI of the protective sheath (D2³l, 10 * DI; preferably D2³l, 20 * Dl, more preferably D2³l, 30 * Dl).

Said at least one connecting textile sheath and the protective textile sheath are each obtained by mechanical manipulation of at least one thread.

Said at least one connecting textile sheath and the protective textile sheath each comprise at least one non-electrically conductive wire and at least one electrically conductive wire.

The hollow textile sheaths each have a substantially tube shape so that it is possible, at rest and therefore without stress, to measure their external diameters. The textile sleeves are flexible so that they can be folded and their cross sections can be substantially deformed, with or without expansion, in a reversible manner so as to adapt to the shape of the elongated elements and the connectors.

Preferably, the connection sheath has a longitudinal axis L2 and the protective sheath has a longitudinal axis L1, the connection sheath and the protective sheath are co-axial. The axes L1 and L2 are thus preferably combined.

Said yarn (s) in the present invention (conductor (s) of electricity or not) can / can be a monofilament yarn, a yarn spun fibers or else a multifilament yarn.

The shielding device can be used in the following industries: aeronautics, automotive, aerospace, rail, marine, telecommunications, household appliances, electrical generators and transformers, lighting, and in particular in the automotive industry, aeronautics, and rail.

The function of the electromagnetic shielding device according to the invention is to protect the electric cables from external mechanical attacks, but also from electromagnetic interference.

An electromagnetic interference is considered in this text to be any disturbance generated by a source, for example electrical, placed outside the shielding device, or inside the shielding device (by electric cables), capable (s) of producing an electric circuit by electromagnetic induction, electrostatic coupling, or conduction, or even a combination of these.

The shielding device therefore also protects the external environment of said shielding device from electromagnetic interference which may be emitted by the electric cables which it contains.

The frequency of an interference is preferably greater than 0 KHz and less than or equal to 2 GHz.

In one embodiment, the shielding device complies with the IEC 62153-4-3: 2013 (IEC for International Electrotechnical Commission) standard entitled "Metallic Communication Cable Test Methods - Part 4-3: Electromagnetic Compatibility (EMC) - Transfer surface impedance - Triaxial method "or" Metallic communication cable test methods - Parts 4-3: Electromagnetic compatibility (EMC) - Surface transfer impedance - Triaxial method ". This method determines the protection effectiveness of a shielding device by applying a predefined current and voltage to determine the transfer surface impedance. This method is used in particular for electromagnetic disturbances of low frequencies, that is to say between 0 KHz and 100 MHz. Preferably, the attenuation for low frequencies obtained according to standard IEC 62153-4-3: 2013 is greater than or equal to 30 dB, more preferably greater than or equal to 60 dB.

In one embodiment, the shielding device complies with standard IEC 61000-4-21: 2011 (IEC for International Electrotechnical Commission) entitled "Electromagnetic Compatibility (EMC) - Part 4-21: - Test and measurement techniques - Methods reverberation chamber test ”or“ Electromagnetic compatibility (EMC) - Parts 4-21: Testing and measurement techniques - Reverberation chamber test methods ”. This method determines the effectiveness of the protection of a shielding device in reverberation chambers. This method is used in particular for electromagnetic disturbances of high frequencies, that is to say greater than 100 MHz.

Preferably, the attenuation for high frequencies obtained according to standard IEC 61000-4-21: 2011 is greater than or equal to 30 dB, more preferably greater than or equal to 50 dB.

In one embodiment, the resistivity of the protective textile sheath and / or the resistivity of the connecting textile sheath is / are greater (s) or equal (s) than 0.1 itiW (miliohm) / meter, and less (s) or equal (s) to 10 mQ / meter, in particular less than or equal (s) to 5 mO / meter.

In one embodiment, the breaking force of the shielding device is greater than or equal to 1000 Newtons, in particular greater than or equal to 3000 Newtons, more particularly greater than or equal to 5,000 Newtons, in particular less than or equal to 100,000 Newtons.

In one embodiment, the first joining zone has a width greater than or equal to 5 mm, in particular greater than or equal to 10 mm, more particularly less than or equal to 50 mm, in particular less than or equal to 30 mm.

In one embodiment, the protective textile sheath and / or the connecting textile sheath does not / include a longitudinal opening.

In the present text, the diameter at rest of a textile sheath is understood to mean its external diameter in the unexpanded state, without any deformation being applied to it. In the present text, the diameter in the expanded state of a textile sheath is understood to mean its external diameter in the expanded state, under the application of a radial deformation. In a variant, the connection sheath comprises a front part having a substantially annular open front end having a diameter D2 at rest, said front part being configured to expand radially to adopt a diameter D2 'in the expanded state greater than or equal. to 1.20 times, preferably greater than or equal to 1.30 times, more preferably greater than or equal to 1.40 times, in particular less than or equal to 1.80 times, the diameter D2.

The annular front part of the connection sheath thus easily adapts to different shapes of connectors, which are in particular square or rectangular. Preferably, the protective sheath is configured to expand radially to adopt a diameter D1 'in the expanded state greater than or equal to the diameter D2 at rest. In a variant, the front part of the protective sheath is in a radially expanded state and has a diameter D1 'approximately equal to the diameter D2 of the connection sheath.

Preferably, the substantially annular front part of the protective sheath is in an expanded state in the first joining zone, in particular has an external diameter greater than Dl, in particular of the order of Dl '.

The diameter Dl 'is approximately equal to the (external) diameter D2, within +/- one or two thickness (s) of the connection sheath.

Advantageously, the protective sheath being configured to expand radially, this facilitates its connection with the connection sheath.

In one embodiment, when the shielding device comprises a second textile connection sheath, the substantially annular rear part of the protective sheath is in a radially expanded state in the second securing zone, in particular has a diameter D1 "to the expanded state greater than or equal to D3 at rest.

This ability to expand the protective sheath makes it possible to obtain a first area of attachment, for example of superposition, and therefore of contact, of the part. annular front of the protective sheath with the annular rear part of the connection sheath, improving the conduction of electricity between the two sheaths and therefore the preservation of the electromagnetic shielding effect over the entire length of the shielding device. The same effect applies for the second joining zone when it is present.

The protective sheath is configured to expand such that the diameter (s) DI 'and / or Dl "is / are greater than or equal to / equal to 1.20 times, preferably greater than (s). or equal / equal to 1.30 times, more preferably greater than or equal / equal to 1.40 times, in particular greater (s) or equal / equal to 1.80 times, than the diameter (s) ) D2 and / or D3.

In a variant, the rear part of the connection sheath is folded back on itself in the first joining zone, in particular in substantially U-shape along a longitudinal section plane P passing through the longitudinal axis L2 of the sheath. connection.

This arrangement makes it possible to have a clean, rounded junction between the textile connection and protection sheaths, thus avoiding any risk of catching on the path of the shielding device. The tear resistance of the thus formed junction is also improved compared to a junction whereby the annular front part of the protective sheath would be placed inside the non-folded annular rear part of the connecting sheath.

In particular, the front part of the protective sheath comprises a single textile layer in the first joining zone and the rear part of the connecting sheath comprises two superimposed textile layers, in particular in the first joining zone.

Preferably, the rear part of the connection sheath is folded inside its interior volume.

It is understood by folded back on itself that the rear part of the connection sheath comprises a folded portion facing the connection sheath, directly against the connection sheath or around (that is to say by sandwiching) one or more elements, for example around at least a portion of the protective sheath.

In a variant, the rear part of the connection sheath comprises an internal portion at least in part secured to the protective sheath, in particular to the front part of the latter, and an external portion, superimposed on the internal portion and in the extension of the internal portion.

The internal and external portions of the rear part of the connection sheath each comprise opposite internal and external faces, the external faces being oriented towards the outside of the internal volume of the connection sheath. The front part of the protective sheath comprises opposite internal and external faces, the internal face being oriented opposite the internal volume of the protective sheath.

Preferably, the internal face of the internal portion of the rear part of the connection sheath is in contact with the external face of the front part of the protective sheath.

In one embodiment, the external face of the internal portion of the rear part of the connection sheath is in contact with the internal face of the external portion of the connection sheath.

In another embodiment, the external face of the internal portion of the rear part of the connection sheath is in contact, in particular secured, with the front part of the protective sheath, in particular with the external face of the protective sheath.

In a variant, the front part of the protective sheath is folded back on itself, in particular in the first joining zone, in particular in the shape of a substantially U along a longitudinal section plane P passing through the longitudinal axis L1 of the protective shealth.

Preferably, the front part of the protective sheath is folded back outside the protective sheath, for example so as to form a U facing outwards.

This arrangement allows the front part of the protective sheath to have a rounded face opening into its internal volume, and thus prevents damage to the electric cables arranged in its internal volume.

It is understood by folded back on itself that the front part of the protective sheath comprises a folded portion facing the protective sheath, directly against the protective sheath or around one or more elements, for example around other elements. minus a portion of the connection sheath.

In a variant, the front part of the protective sheath comprises an outer portion at least in part secured to the connection sheath, and an internal portion covered at least in part by the outer portion of the front part of the protective sheath and in the extension of the external portion.

In a sub-variant, the external portion of the front part of the protective sheath is secured at least in part to the rear part of the connection sheath, in particular to the internal portion of the rear part of the connection sheath.

In a sub-variant, the internal portion of the front part of the protective sheath is oriented facing the internal volume of the protective sheath.

In a variant, the front part of the protective sheath is folded back on itself around, at least partially, a portion of the rear part of the connection sheath, in particular the internal portion of the connection sheath. The inner portion of the rear part of the connection sheath is disposed between the outer and inner portions of the front part of the protective sheath.

In a variant, the folded front part of the protective sheath is superimposed with the folded back part of the connection sheath.

Preferably, the outer portion of the front part of the protective sheath and the inner portion of the rear part of the connection sheath are arranged between the inner portion of the front part of the protective sheath, and the outer portion of the rear part of the connection duct.

The folded front part of the protective sheath is thus not partially nested with the folded back part of the connection sheath.

In a variant, the front part of the protective sheath comprises a front annular edge and the rear part of the connection sheath comprises a rear annular edge, the front annular edge of the protective sheath and the rear annular edge of the protective sheath. connection being arranged edge to edge in the first joining zone without superimposition of the protective sheath by the connection sheath.

In another variant, the front part of the protective sheath is superimposed with the rear part of the connection sheath in the first joining zone.

Preferably, the front part of the protective sheath and the rear part of the connection sheath each comprise a single textile layer.

Preferably, the front part of the protective sheath is arranged inside the connection sheath, in contact with the internal face of the rear part of the connection sheath.

In a variant, the first electrically conductive joining zone comprises three or four textile layers joined in their thicknesses in an electrically conductive manner, including at least two textile layers of the protective textile sheath, and at least one textile layer. of the connection sheath.

Preferably, the outer portion of the rear part of the connection sheath is not secured in its thickness, in particular in an electrically conductive manner, to the front part of the protective sheath, that is to say to the internal and / or external portion of the front part of the protective sheath, and / or to the internal portion of the rear part of the connection sheath. In particular, the external portion of the connection sheath does not include any solder.

In one embodiment, the three joined textile layers comprise the external and internal portions of the front part of the protective sheath and the internal portion of the rear part of the connection sheath. In one embodiment, the four joined textile layers comprise the external and internal portions of the front part of the protective sheath and the internal and external portions of the rear part of the connection sheath.

In a variant, the first electrically conductive connection zone is covered with at least a portion of the rear part of the connection sheath, in particular by the outer portion of the rear part of the connection sheath.

Advantageously, the outer portion of the rear part of the connection sheath is not secured, in particular welded, in its thickness to the front part of the protective sheath so that it can move relative to the front part of the protective sheath.

This arrangement is found when the connection sheath has been returned during the manufacturing process of the shielding device.

This arrangement prevents a weld from opening to the outside of the shielding device and abrading the surrounding elements by contact.

In one variant, the protective sheath is in one or more textile (s) chosen from: a braid, a fabric, a knit, a nonwoven, or a combination thereof.

In one variant, the connection sheath is in one or more textile (s) chosen from: a braid, a fabric, a knit, a nonwoven, or a combination thereof.

In a variant, the protective sheath and / or the connection sheath is / (are each) a tubular braid or a tubular knit.

In one embodiment, the protective sheath and / or the connection sheath is / are each obtained by braiding a number of strands included in the interval [16; 144], especially in the interval [32; 144], each wick comprising at least one electrically conductive wire and / or at least one non-electrically conductive wire, preferably each wick comprising at least two non-electrically conductive wires.

In one embodiment, the number of crossings per inch of the strands of the braided protective sheath and / or of the braided connection sheath is greater than 0 and less than or equal to 20, preferably greater than or equal to 5 and less than or equal to 15. A wick may include one or more threads and is supported by a spindle (corresponding to a spool) on the braiding machine.

In a variant, the protective sheath and / or the connection sheath comprises / (each comprise) at least one electrically conductive yarn, in particular a monofilament yarn and / or a multifilament yarn and / or a spun yarn of fibers, and / or electrically conductive fibers.

The electrically conductive yarn is preferably a monofilament yarn or a multifilament yarn.

In one embodiment, the monofilament of the electrically conductive monofilament yarn or some or all of the filaments of the multifilament yarn Electrically conductive may / may each be of the core-coating type, with a coating, such as a mantle, in at least one electrically conductive material such that the outer coating conducts electricity. The core is also preferably in at least one electrically conductive material. In this case, the wire can be a tinned wire, for example made of tinned copper, in particular comprising a copper core and a tin or nickel coating.

In another embodiment, the monofilament of the monofilament yarn or some or all of the filaments of the multifilament yarn may / may each be in at least one electrically conductive material.

Preferably, when the conductive yarn is a multifilament yarn, it comprises from 2 to 50 filaments, more preferably from 2 to 40 filaments, in particular from 4 to 25 filaments, particularly from 5 to 20 filaments.

Preferably, the diameter of each of at least some or all of the filaments of the multifilament yarn is greater than 0 mm and less than or equal to 1 mm, more preferably less than or equal to 0.50 mm, preferably less than or equal to equal to 0.30 mm, in particular of the order of 0.10 mm.

Said at least one electrically conductive material is chosen from metals, preferably chosen from: copper, stainless steel, iron, silver, aluminum and nickel.

In one variant, the protective sheath and / or the connection sheath comprises / (each comprise) at least one yarn, in particular a monofilament yarn and / or a multifilament yarn and / or yarn spun fibers, non-conductive of electricity , and or fibers that are not electrically conductive.

Said yarn and / or the non-conductive / electrically conductive fibers comprises / comprise at least one non-electrically conductive material, in particular at least one synthetic material, in particular at least one polymer material, in particular at least in part hot melt. This latter arrangement facilitates the manufacture of the first electrically conductive joining zone by welding (ultrasound, by friction, etc.).

Said at least one electrically non-conductive material is preferably chosen from the list consisting of: polyesters, in particular polyethylene terephthalate, polybutylene terephthalate; aramids, especially para-aramid and meta-aramid; polyamides, in particular PA 6-6, PA 4-6, PA 6; polypropylene, polyethylene, in particular high molecular weight polyethylene, polysulfone, carbon (carbon fibers), base (base fibers), glass (glass fibers) or a mixture of these.

Preferably, the monofilament yarn has a diameter greater than 0 mm, and less than or equal to 1 mm, more preferably less than or equal to 0.50 mm, in particular less than or equal to 0.30 mm. Preferably, the multifilament yarn or the spun yarn of fibers has a count greater than 0 dtex and less than or equal to 3000 dtex, more preferably less than or equal to 1500 dtex, in particular less than or equal to 800 dtex, in particular greater than or equal to at 200 dtex and less than or equal to 800 dtex, for example of the order of 550 dtex to within +/- 100 dtex.

In one variant, the braided or knitted protective sheath and / or the braided or knitted connection sheath has / have an optical coverage greater than or equal to 60% (in particular between 60% and 100%).

The optical coverage is measured on the textile sheath at rest, according to the body of the latter, outside the electrically conductive connection zones. This coverage rate can be measured using ANSI / SCTE 51 2007.

In a variant, the protective sheath and the connection sheath are joined at least partially in the first joining zone using at least one connecting means chosen from the list consisting of: an ultrasonic welding, a welding by electron bombardment, friction weld, braze weld, seam with at least one electrically conductive wire, or a combination thereof (list I), preferably a bonding medium selected from the list consisting in: ultrasonic welding, friction welding, brazing welding, seaming with at least one electrically conductive wire, or a combination of these (list II).

Ultrasonic welding is preferred because it makes it possible to obtain good conductivity in the first joining zone, as well as good mechanical resistance (in particular breaking strength) compared to other types of welding.

Alternatively, the connecting means comprises a mechanical securing member, in particular electrically conductive, for example a tightening ring or securing member comprising first and second fasteners configured to cooperate together for their closure (reversibly or not).

Said mechanical securing member can be combined with a connecting means chosen from the above list (list I or II).

The present invention relates, according to a second aspect, to a method of manufacturing an electromagnetic shielding device according to any one of the preceding variant embodiments with reference to a first aspect of the invention, comprising: (i) - a step of providing a protective hollow textile sheath having an outer diameter at rest DI and an inner volume configured to receive one or more elongate element (s), and comprising a substantially annular front portion having an open front end , on at least one expansion device; in particular a region of a shape, said region having an external perimeter (in particular a diameter) greater than or equal to D2; causing expansion at least of the substantially annular front part of the protective sheath along an outer perimeter (in particular a diameter) Dl 'substantially equal to D2;

(ii) - a step of providing a connecting hollow textile sheath having a main diameter at rest D2, D2 being greater than D1, and a substantially annular rear part having a rear open end, and a step of bringing into contact the rear part of the connecting sheath with the front part of the protective sheath;

(iii) - a step of forming a first electrically conductive joining zone, in particular at least partially annular, in which the rear part of the connection sheath and the front part of the protective sheath are joined at least in part;

(v) - obtaining the shielding device.

Preferably, said at least one protective sheath and / or said at least one connection sheath is / are manufactured on a braiding machine or a knitting machine. The connection sheath and the protective sheath are tubular braids or different tubular knits, which makes it possible to differentiate their properties and their diameters.

The form is a tool for shaping, in particular for expanding, at least the front part of the protective sheath. Said at least one region of the form may have any shape, in particular conical or rectangular, as long as the perimeter or circumference of the form corresponds to the desired expansion for the front part of the protective sheath.

In a variant, step (ii) comprises the superposition, or the juxtaposition, at least partially, of the front part of the protective sheath with the rear part of the connection sheath.

In a variant, the protective sheath comprises a protective textile body projecting from its annular front part, and the connection sheath comprises a connecting textile body projecting from its annular rear part. During step ii), the rear part of the connection sheath is superimposed on the front part of the protective sheath on at least the expansion device, in particular said region of the form, the front part of the protective sheath. protection being arranged between at least said expansion device, in particular at least said one region of the form, and the rear part of the connection sheath. During step iii), said protective and connecting textile bodies are at least partly superimposed. The method comprises a step iv), before step v), comprising the turning of the body of the connection sheath.

In particular, the turning of the body of the connection sheath is carried out so that the connection sheath and the protective sheath are superimposed in particular only, according to the rear part of the connection sheath, and according to the front part of the protective sheath.

In one embodiment, when the rear part of the connection sheath is superimposed at least partially with the front part of the protective sheath during step ii):

a) the front part of the protective sheath (in particular not folded back on itself) is arranged between the expansion device, in particular said at least one region of the form, and the rear part of the connection sheath (in particular not folded in on itself); or

b) the front part of the protective sheath is folded around at least a portion of the connection sheath, in particular around the internal portion of the rear part of the connection sheath; or

c) the rear part of the folded protective sheath is covered, at least partially, by the rear part (in particular not folded back on itself) of the connection sheath.

Preferably, for the arrangement a), the first electrically conductive joining zone comprises (consists of) two textile layers which are joined together electrically conductive in their thicknesses.

Preferably, for the arrangements b) and c), the first electrically conductive joining zone comprises (consists of) three textile layers which are joined together in an electrically conductive manner in their thicknesses.

Preferably, the first securing zone is covered with a portion of the connection sheath, in particular with the outer portion of the rear part of the connection sheath, turned against the outer and inner portions of the front part of the connection sheath. protection and against the internal portion of the rear part of the connection sheath.

In a variant, the step of forming the first electrically conductive joining zone is carried out using at least one connecting means chosen from the list consisting of: an ultrasonic welding, a welding by bombardment of 'electrons, friction weld, braze weld, seam with at least one electrically conductive wire, or a combination of these (list I), preferably a bonding medium selected from the list consisting of: ultrasonic welding, friction welding, brazing welding, seaming with at least one electrically conductive wire, or a combination of these (List II). Ultrasonic welding is preferred because it makes it possible to obtain good conductivity in the first joining zone, as well as good mechanical resistance (in particular breaking strength) compared to other types of welding.

Alternatively, the connecting means comprises a mechanical securing member, in particular a conductor of electricity, for example a ring of clamp or securing member comprising first and second fasteners configured to cooperate together for their closure (reversible or not).

Said mechanical securing member can be combined with a connecting means chosen from the above list (list I or II). The present invention relates, according to a third aspect, to an electricity transmission device comprising at least one connector having a grounding zone, and one or more elongated conductive element (s). electricity, in particular configured (s) each to transmit an electrical signal and / or electrical power, comprising an electromagnetic shielding device according to any one of the variant embodiments with reference to the first aspect of the invention.

In a variant, the front part of the connection sheath is secured at least in part to the grounding zone.

The front part of the connection sheath can be secured to the grounding zone of the connector by means of a solder or, preferably, by means of a clamping member, such as a link. clamp, pressing the electrically conductive inner face of the front portion of the connection sleeve against the surface of the grounding area.

The variants, embodiments, definitions according to the first, second, and third aspects of the invention can be combined with one another, independently of one another.

Description of the drawings

The invention will be better understood on reading the following description of embodiments of the invention given by way of non-limiting example, with reference to the appended drawings, in which:

[Fig. 1] FIG. 1 illustrates a first example of a connector in connection with two electric cables;

[Fig. 2] FIG. 2 illustrates a first example of an electromagnetic shielding device arranged on the connector and the electric cables shown in FIG. 1 forming a transmission device according to the invention;

[Fig. 3] FIG. 3 represents a first step of a preferred example of the method of manufacturing the shielding device shown in FIG. 2;

[Fig. 4] FIG. 4 represents a first example of a shielding device obtained after the first step of the manufacturing process shown schematically in FIG. 3;

[Fig. 5] FIG. 5 represents a step in the manufacturing process of the shielding device shown in FIG. 2;

[Fig. 6] FIG. 6 illustrates the first example of the shielding device of FIG. 2; [Fig. 7] FIG. 7 illustrates the first example of a shielding device along the plane P of longitudinal section VII-VII shown in FIG. 6;

[Fig.8] FIG. 8 illustrates a second example of a shielding device according to the invention; and

[Fig.9] FIG. 9 illustrates a third example of a shielding device according to the invention; and

[Fig.10] FIG. 10 illustrates a fourth example of a shielding device according to the invention; and

[Fig.11] FIG. 11 illustrates a fifth example of a shielding device according to the invention; and

[Fig.12] FIG. 12 illustrates a step in the manufacturing process of the fourth example of the shielding device shown in FIG. 10.

Description of embodiments

Shielding device

The connector 10 shown in Figure 1 comprises a grounding zone 15 and two electrical outlets 17,18 to which two elongated elements 20,21, in particular electrical cables, are connected.

FIG. 2 represents a transmission device 30 comprising the connector 10 and the electric cables (20,21) represented in FIG. 1 as well as a first example of an electromagnetic shielding device 40 according to the invention. This shielding device 40 comprises a protective hollow textile sheath 50 having a main diameter at rest DI and an internal volume configured to receive the electric cables 20 and 21. The shielding device 40 also comprises a hollow textile connecting sheath 60 having a diameter at rest D2. As shown in Figure 7, the protective textile sheath 50 includes a substantially annular front portion 52 having an open front end 54, and the connecting textile sheath 60 includes a substantially annular rear portion 62 having an open rear end 64. The shielding device 40 comprises a first electrically conductive joining zone 70, in particular at least partially annular, in which the rear part 62 of the connection sheath 60 and the front part 52 of the protective sheath 50 are joined at least in part.

The connection sheath 60 comprises a front portion 67 having a substantially annular front open end 69 having a diameter D2 at rest, said front portion 67 being configured to expand radially to adopt a diameter D2 'in the expanded state greater than or equal. to 1.40 times the diameter D2 as shown in Figure 2 in order to at least partially cover the grounding area 15.

The protective sheath 50 is configured to expand radially to adopt a diameter D1 'in the expanded state, greater than or equal to approximately the diameter D2 at rest, in particular in the first joining zone 70. In FIG. 7, the diameter Dl 'seems slightly smaller than the diameter D2 in order to facilitate understanding of the construction of the shielding device 40. In practice, Dl' is of the order of D2. up to two layers of textile layers of connection sheath. In general in the figures, the thicknesses of welded textile layers are shown not crushed, whereas in practice, being secured, in particular welded, they are substantially flattened.

The rear part 62 of the connection sheath 60 is folded back on itself, in particular in the first securing zone 70, in particular in the shape of a substantially U along a longitudinal section plane P VII-VII shown in FIG. 6 and passing by the longitudinal axis L2 of the connection sheath 60.

The rear part 62 comprises an internal portion 66 at least in part secured to the protective sheath 50, in particular to the front part 52 of the latter, and an external portion 68, superimposed on the internal portion 66 and in the extension of the portion internal 66. The first joining zone 70 comprises the front part 52 of the protective sheath 50 and the internal portion 66 of the rear part 62 of the connection sheath 60 joined together in an electrically conductive manner in their thicknesses. The first securing zone 70 is covered by the external portion 68 of the rear part 62 of the connection sheath 60, which is therefore able to move relative to the internal portion 66 and to the front part 52.

The protective sheath 50 and the connection sheath 60 are each in a hollow tubular braid comprising electrically conductive multifilament yarns and monofilament or multifilament yarns made of PET (polyethylene terephatalate). The protective sheath 50, and therefore the body 51, have a diameter Dl of the order of 30 mm. The protective sheath is configured to expand by at least 30%, and is obtained on a braiding machine, each spindle of which supports two electrically conductive wires and two non-electrically conductive wires. The number of crosses per inch is preferably on the order of 12.

The connection sheath 60, and therefore the body 61, have a diameter D2 of the order of 40 mm. The connection sheath is configured to expand by at least 30%, and is obtained on a braiding machine, each spindle of which comprises two electrically conductive wires and two non-electrically conductive wires. The number of crosses per inch is preferably on the order of 11.

Electrically conductive threads are multifilament threads, each thread comprising 8, or 10, or 16 filaments. Each filament has a diameter of about 0.10 mm. Each filament is made of tinned copper, especially with a tin or nickel coating. The electrically non-conductive yarns are preferably polyethylene terephthalate multifilament yarns, each of the order of 550 dtex. In operation for an application in which the length of the cables 20, 21 to be protected is of the order of 80 cm, their combined external diameters of the order of 30 mm, and the length of the connector to be protected is 20 cm with a diameter or outer perimeter of the order of 40 mm, the shielding device 40 comprises a protective sheath 50 having a length of 80 cm and a diameter ID of 30 mm, and a connection sheath 60 having a diameter D2 of the order of 40 mm, and a length of 20 cm. The mass of this device is 216.6 g (ie 149.3 g for the protective sheath 50 and 67.6 g for the connection sheath 60).

By way of comparison, a shielding device of the prior art comprises a single sheath with a diameter of 40 mm having a length of 100 cm, which represents a mass of 336.5 g. In this specific example, the shielding device 40 according to the invention thus advantageously has a mass 36% less than the mass of the comparative shielding device.

FIG. 8 represents a second example of a shielding device 400 according to the invention in which the front part 520 of the protective sheath 500 comprises a front annular edge 540 and the rear part 620 of the connection sheath 600 comprises a rear annular edge 660. The front annular edge 540 of the protective sheath 520 and the rear annular edge 660 of the connection sheath 600 are arranged edge to edge in the first electrically conductive joining zone 700 without overlapping the protective sheath 500 through the connection sheath 600.

FIG. 9 represents a third example of a shielding device 450 according to the invention in which the front part 820 of the protective sheath 800 is superimposed with the rear part 920 of the connection sheath 900 in the first conductive connection zone of the electricity 750, the front part 820 is disposed against the internal face of the rear part 920 of the connection sheath 900.

FIG. 10 represents a fourth example of a shielding device 1000 according to the invention in which the front part 1015 of the protective textile sheath 1010 is folded back on itself towards the outside. The folded front part 1015 has a substantially U-shape along a longitudinal section plane P passing through the longitudinal axis L1 of the protective sheath 1010 having a diameter Dl. The front part 1015 of the protective sheath 1010 is folded around the internal portion 1025 of the rear part 1030 of the connection sheath 1035. The rear part 1030 of the connection sheath 1035 is also folded back on itself, in particular towards the inside of its internal volume 1037 around the external portion 1040 of the front part 1015 of the protective sheath 1010. The front part 1015 of the protective sheath 1010 thus comprises superimposed internal 1045 and external 1040 portions. The rear part 1030 of the connection sheath 1035 comprises internal 1025 and external 1050 portions which are also superimposed. Internal portions 1045 and outer 1040 of the front part 1015 of the protective sheath 1010, substantially annular in shape, are secured in an electrically conductive manner at least partially with the inner portion 1025, of substantially annular shape, of the rear part 1030 of the connection sheath 1035, in particular by ultrasound.

This variant makes it possible to combine a mechanically resistant weld, and improves the protection, in particular against abrasion, of the elongated elements arranged in the internal volume of the protective sheath, and possibly in the internal volume of the connection sheath. Indeed, the front part of the protective sheath offers an end opening into its rounded interior volume. This same effect is obtained for the surrounding elements arranged outside the shielding device 1000 and coming into contact with the rounded surface of the rear part of the folded back connection sheath 1035. The first electrically conductive joining zone 1020 thus comprises three textile layers: the thicknesses or layers originating from the internal 1045 and external 1040 portions of the protective sheath 1010 and the internal portion 1025 of the connection sheath 1035 superimposed and secured between they in their thicknesses using a connecting means resulting from the sheaths themselves, for example by welding or ultrasound. The first securing zone 1020 is covered by a portion, in particular the external portion 1050, of the connection sheath 1035.

Alternatively, the first joining zone can comprise four textile layers joined together in their thicknesses: the internal 1045 and external 1040 portions of the protective sheath 1010, and the internal 1025 and external 1050 portions of the connection sheath 1035 , are joined together, for example by ultrasonic welding. In this case, the manufacturing process does not include turning the body of the connection sheath. The rear part of the connection sheath and the front part of the protective sheath are superimposed according to their final arrangements in the shielding device, then joined together in an electrically conductive manner.

FIG. 11 shows a fifth variant embodiment of a shielding device 1100 according to the invention comprising protective sheaths 1110 of diameter DI and connection 1150 of diameter D2. The front part 1115 of the protective sheath 1110 is folded back on itself towards the outside of the protective sheath 1110, and comprises superimposed internal 1120 and external 1125 portions. The rear part 1155 of the connection sheath 1150 is also folded back on itself, in its internal volume, and comprises superimposed internal 1160 and external 1165 portions. The front part 1115 of the folded protective sheath 1110 is superimposed on the rear part 1155 of the folded back connection sheath 1150. In this specific example, the internal portion 1160 of the connection sheath 1150 and the portion 1125 of the protective sheath 1110 are arranged between the external portion 1165 of the connection sheath and the internal portion 1120 of the protective sheath. The internal portions 1160 and 1120 and the external portion 1125 are joined together by means of a connecting means, in particular originating from the sheaths themselves, for example by ultrasonic welding, and thus form a first joining zone 1170 electrically conductive comprising three textile layers. The first electrically conductive area 1170 is covered by a portion, in particular the outer portion 1165, of the connection sheath 1150, in particular not secured to the first conductive securing area 1170. The first electrically conductive joining area 1170 can alternatively comprise four superimposed textile layers joined together in an electrically conductive manner, by welding the outer portion 1165 with the portions 1160, 1125 and 1120. In this case , the manufacturing process does not include turning the body of the connection sheath. The rear part of the connection sheath and the front part of the protective sheath are superimposed according to their final arrangements in the shielding device, then joined together in an electrically conductive manner.

Manufacturing process of the shielding device

The shielding device 40 is preferably manufactured according to a manufacturing method described below with reference to FIGS. 3 to 6. The method firstly comprises a step of arranging the protective hollow textile sheath 50 on at least one region. 80 of a shape 90, said region 80 having an external perimeter corresponds to the external diameter Dr greater than or equal to D2, causing the expansion at least of the substantially annular front part 52 according to a diameter D1 'substantially equal to D2. The protective sheath 50 comprises a protective textile body 51 projecting from its annular front part 52, and the connection sheath 60 comprises a connecting textile body 61 projecting from its annular rear part 62, said protective textile bodies and connection (51, 61) being substantially superimposed as shown in FIGS. 3 and 4. Then, the method comprises a step of connecting the hollow textile connection sheath 60 with the front part 52 of the connection sheath 50. In particular , the rear part 62 of the connection sheath 60 is superimposed on the front part 52 so that the front part 52 is disposed between said at least one region 80 of the form 90 and the rear part 62 of the connection sheath 62. The method then comprises a step of forming the first electrically conductive joining zone 70, in particular at least partially annular, in which the rear part 62 of the connection sheath 60 and the pa front rtie 52 of the protective sheath 50 are secured at least in part. The first securing zone 70 is preferably formed using at least one bonding means selected from the list consisting of: ultrasonic weld, electron bombardment weld, friction weld, solder weld, seam with at least one wire electrically conductive, or a combination of these, preferably using ultrasonic welding. This type of connection makes it possible to form a joining zone that is resistant to tearing but also perfectly conductive of electricity so that the shielding effect is constant throughout the shielding device 40. The method finally comprises a step of inverting the body 61 of the connection sheath 60, as shown in FIG. 5, so that the connection sheath 60 and the protective sheath 50 are superimposed, in particular only, in the first joining zone 70.

In operation, the body 51 of the protective sheath 50 has a diameter suitable for the electric cables 20, 21 that it comprises in its internal volume without the body expanding, thus retaining its shielding and protection properties against attacks. exterior mechanics. The connection sheath 60 is secured to the protective sheath 50 by means of a first connection zone conducting electricity 70. The annular front part 67 of the connection sheath 60 can also expand according to a diameter or a perimeter D2 ′ so as to perfectly cover at least part of the earthing zone 15. Preferably, the front part 67 is kept in contact with the earthing zone 15 by means of a clamping collar. clamp or adhesive surrounding the connector and the front part 67.

The shielding device 40 according to the invention thus has a differentiated size over its length adapted on the one hand to electric cables and on the other hand to the connector, which makes it possible to optimize its mass. In addition, in operation, the body 61 is not deformed and therefore retains its shielding properties. The shielding device 40 thus has better resistance to the cables to be protected, which do not move in the protective sheath since it is adjusted. Moreover, the protective sheath being less bulky than the connection sheath, the shielding device has a reduced volume and is therefore less bulky. This arrangement is particularly advantageous when the shielding device is fitted, for example, in electric or hybrid cars, making it possible to reduce the size of the engine space, thus freeing up space for other needs.

A step of the manufacturing process of the shielding device 1000 is shown in Figure 12.

There is (i) first of all a protective hollow textile sheath 1010 having an outer diameter at rest DI and an inner volume 1005 configured to receive one or more elongate element (s), and comprising a substantially annular front part 1015 having an open front end, on at least one device expansion (not shown), causing expansion at least of the substantially annular front part 1015 of the protective sheath 1010 along an outer perimeter Dl 'substantially equal to D2. Provided is (ii) a connecting hollow textile sheath 1035 having a main diameter at rest D2, D2 being greater than D1, and a substantially annular rear portion 1030 having an open rear end. The rear part 1030 of the connection sheath 1035 is brought into contact with the front part 1015 of the protective sheath 1010 so that the front part 1015 of the protective sheath 1010 is folded outwards and around the internal portion 1025 of the rear part 1030 of the connection sheath 1035. Then, forming (iii) the first electrically conductive connection zone 1020, in particular at least partially annular, in which the rear part 1030 of the connection sheath 1035 and the front part 1015 of the protective sheath 1010 are at least partially secured. The protective sheath 1010 comprises a protective textile body 1008 projecting from its annular front part 1015, and the connection sheath 1035 comprises a connecting textile body 1032 projecting from its annular rear part 1030 as shown in FIG. 12. During step ii), the rear part 1032 of the connection sheath 1035 is at least partially superimposed on the front part 1015 of the protective sheath 1010 on at least the expansion device, the front part 1015 of the sheath protection 1010 being disposed between said at least expansion device, and the rear part 1030 of the connection sheath 1035. The protective sheath 1010 comprises a protective textile body 1008 projecting from its annular front part 1015, and the sheath connection 1035 comprises a textile connection body 1032 projecting from its annular rear part 1035. During step iii), said textile protective body 1008 and connection 1032 are at least in part superimposed. The method then comprises the reversal (iv) of the body 1032 of the connection sheath 1035 so that the connection sheath 1035 and the protective sheath 1010 are superimposed, in particular only, according to the rear part 1030 of the connection sheath 1030 and the front part 1015 of the protective sheath 1010.

It should be noted that for the manufacture of the device 1100 shown in FIG. 11, the method described above is similar with the only difference that when the sheaths 1110 and 1150 are brought into contact, the front part 1115 folded towards the exterior is superimposed at least partially with the non-folded rear part of the connection sheath, in particular superimposed with the internal portion of the rear part of the connection sheath.

Claims

1. Electromagnetic shielding device (40,400,450,1000,1100) comprising: a. At least one protective hollow textile sheath (50,500, 800,1010,1100) having a main diameter at rest DI and an interior volume configured to receive one or more elongated element (s) (20,21),

b. At least one hollow textile connection sheath (60,600, 900,1035,1150) having a diameter at rest D2, D2 being greater than Dl,

characterized in that the protective textile sheath (50,500, 800,1010,1100) comprises a substantially annular front part (52, 520,820,1015,1115) having an open front end (54), the connecting textile sheath (60,600,900, 1150,1035) includes a substantially annular rear portion (62,620,920,1030,1155) having an open rear end (64), and the shielding device (40,400,450,1000,1100) includes a first electrically conductive bonding area ( 70,700,750,1170,1020), in particular at least partially annular, in which the rear part (62,620,920,1030,1155) of the connection sheath (60,600,900,1035,1150) and the front part (52,520, 820,1015,1115) of the protective sheath (50,500,800,1010,1110) are at least partially secured.

2. A shielding device (40,400,450,1000,1100) according to claim 1, characterized in that the connection sheath (60, 600,1030,1150) comprises a front part (67) having an open front end (69) substantially annular having a diameter D2 at rest, said front part (67) being configured to expand radially to adopt a diameter D2 'in the expanded state greater than or equal to 1.20 times the diameter D2.

3. Shielding device (40,400,450,1000,1100) according to either of claims 1 and 2, characterized in that the front part (52,520,1015,1115) of the protective sheath (50,500,1010, 1110) is in an expanded state and has a diameter D1 'approximately equal to the diameter D2 of the connection sheath (60, 600,1035,1150).

4. A shielding device (40,1000,1100) according to any one of claims 1 to 3, characterized in that the rear part (62,1035,1155) of the connection sheath (60,1030,1150) is folded back on itself, in particular in the shape of a substantially U along a longitudinal section plane P passing through the longitudinal axis L2 of the connection sheath (60,1030,1150).

5. A shielding device (40,1000,1100) according to claim 4, characterized in that the rear part (62,1155,1030) of the connection sheath (60,1035,1150) comprises an internal portion (66,1160,1025) at least partly integral with the protective sheath (50,1010,1110), in particular to the front part (52,1015,1115) of the latter, and an external portion ( 68,1050,1165) superimposed on the internal portion (66,1025,1160) and in the extension of the internal portion (66,1025,1160).

6. A shielding device (1000,1100) according to any one of claims 1 to 5, characterized in that the front part (1015,1115) of the protective sheath (1010,1110) is folded back on itself, in particular in the shape of a substantially U along a longitudinal section plane P passing through the longitudinal axis L1 of the protective sheath (1010,1110).

7. A shielding device (1000,1100) according to claim 6, characterized in that the front part (1015,1115) of the protective sheath (1010,1110) comprises an outer portion (1040,1125) at least partly secured to the connection sheath (1035,1150), and an internal portion (1045,1120) covered at least in part by the external portion (1040,1125) of the front part (1015,1115) of the protective sheath ( 1010,1110) and in the extension of the external portion (1040,1125).

8. Shielding device (1000) according to either of claims 6 and 7, characterized in that the front part (1015) of the protective sheath (1010) is folded back on itself around, at least partially, a portion (1025) of the rear part (1030) of the connection sleeve (1035), in particular the internal portion (1025) of the connection sleeve (1035).

9. Shielding device (1100) according to either of claims 6 and 7, characterized in that the front part (1115) folded over of the protective sheath (1110) is superimposed with the rear part (1155) folded back of the connection sheath (1150).

10. A shielding device (400) according to any one of claims 1 to 3, characterized in that the front part (520) of the protective sheath (500) comprises a front annular edge (540) and the rear part ( 620) of the connection sleeve (600) includes a rear annular edge (660), the front annular edge (540) of the protective sleeve (500) and the rear annular edge (660) of the connection sleeve (600) being arranged edge to edge in the first joining zone (700) without superposition of the protective sheath (500) by the connection sheath (600).

11. A shielding device (40,450,1000,1100) according to any one of claims 1 to 5, characterized in that the front part (52,820,1015,1115) of the protective sheath (50, 800,1010,1100) is superimposed with the rear part (62, 920,1030,1155) of the connection sheath (60, 900,1035,1150) in the first joining zone (750, 1020,1170).

12. A shielding device (40,450,1000,1100) according to any one of claims 1 to 11, characterized in that the first joining zone (70,920,1020,1170) comprises three or four textile layers joined together in their thicknesses of electrically conductive manner in which at least two textile layers (1040, 1045; 1120, 1125) of the protective textile sheath (50,800,1010,1110), and at least one textile layer (1025; 1160) of the protective sheath connection (60,900,1035,1150).

13. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 12, characterized in that the protective sheath (50,500,

800,1010,1110) is in one or more textile (s) chosen from: a braid, a fabric, a knit, a nonwoven, or a combination thereof.

14. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 13, characterized in that the connection sheath (60,600,

900,1035,1150) is in one or more textile (s) chosen from: a braid, a fabric, a knit, a nonwoven, or a combination thereof.

15. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 14, characterized in that the protective sheath (50,500,

800,1010,1110) and / or the connecting sheath (60,600,900,1035,1150) is / (are each) a tubular braid or a tubular knit.

16. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 15, characterized in that the protective sheath (50,500,

800,1010,1110) and or the connection sheath (60,600,900,1035,1150) comprises / (each include) at least one electrically conductive wire and / or electrically conductive fibers.

17. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 16, characterized in that the protective sheath (50,500,

800,1010,1110) and / or the connection sheath (60, 600, 900,1035,1150) comprises / (each include) at least one non-electrically conductive wire and / or non-conductive fibers of the electricity.

18. A shielding device (40,400,450,1000,1100) according to any one of claims 1 to 17, characterized in that the protective sheath (50,500, 800,1010,1110) and the connection sheath (60,600,900,1035, 1150) are joined at least partially in the first joining zone (70,700, 750,1020,1170) using at least one connecting means chosen from the list consisting of: an ultrasonic welding, a welding by bombardment of electrons, a friction weld, a braze weld, a seam with at least one electrically conductive wire, or a combination of these.

19. A method of manufacturing an electromagnetic shielding device (40,400, 450,1000,1100) according to any one of claims 1 to 18, characterized in that it comprises:

(i) - a step of arranging a protective hollow textile sheath (50,500, 800,1010,1110) having an outside diameter at rest DI and an inside volume configured to receive one or more elongated element (s) , and comprising a substantially annular front portion (52,520,820,1015,1115) having an open front end, on at least one expansion device, causing the expansion of at least the substantially annular front portion (52,520,820,1015,1115) of the protective sheath (50,500, 800,1010,1110) along an external perimeter DI 'substantially equal to D2;

(ii) - a step of providing a connecting hollow textile sheath (60,600,

900.1035.1150) having a principal diameter at rest D2, D2 is greater than D1, and a substantially annular rear part (62,620,920,1030,1155) having an open rear end, and a step of contacting the rear part (62 , 620,920,1030,1155) of the connection sheath (60,600,900,1035,1150), with the front part (52,520,820,1015,1115) of the protective sheath (50,500, 800,1010,1110);

(iii) - a step of forming a first electrically conductive joining zone (70,700,750,1020,1170), in particular at least partially annular, in which the rear part (62,620,920,1030,1155) of the sheath connection (60,

600.900.1035.1150) and the front part (52,520,820,1015,1115) of the protective sheath (50,500,800,1010,1110) are at least partially joined;

(v) obtaining the shielding device (40,400,450,1000,1100).

20. The manufacturing method according to claim 19, characterized in that step (ii) comprises the at least partial superposition, or juxtaposition, of the front part (52,520,820,1015,1115) of the protective sheath (50,500,800, 1010,1110) with the rear part (62,620,920,1030,1155) of the connection sheath (60,600,

900.1035.1150).

21. The manufacturing method according to either of claims 19 and 20, characterized in that the protective sheath (50,1010) comprises a protective textile body (51,1008) projecting from its annular front part (52.1015), and the connection sheath (60.1035) comprises a connecting textile body (61.1032) projecting from its annular rear part (62.1030), in that during step ii) the rear part (62,1030) of the connection sheath (60,1035) is at least partially superimposed on the front part (52,1015) of the protective sheath (50,1010) on at least the expansion device , the front part (52,1015) of the protective sheath (50,1010) being disposed between said at least expansion device, and the rear part (62,1030) of the connection sheath (60,1035), in that during step iii), said protective textile bodies (51,1008) and connection (61,1032) are at least partly superimposed, and in that the method comprises a step iv), before l 'step e v), comprising the reversal of the body (61.1032) of the connection sheath (60.1035).

22. A method of manufacturing a shielding device according to any one of claims 19 to 21, characterized in that the step of forming the first joining zone (70,700,750,1020,1170) is carried out using at least one connecting means chosen from the list consisting of: an ultrasonic weld, an electron bombardment weld, a friction weld, a brazing weld, a seam with at least one electrically conductive wire, or a combination of these.

23. Device for transmitting electricity (30) comprising at least one connector (10) having a grounding zone (15), and one or more elongated element (s) conductive (s) of the cable. electricity (20,21), in particular configured (s) each to transmit an electrical signal and / or electrical power, comprising an electromagnetic shielding device (40,400,450,1000,1100) according to any one of claims 1 to 18 .

24. Device for transmitting electricity (30) according to claim 23, wherein the front part (67,1015,1115) of the connection sheath (60,600,900,1035,1150) is secured at least in part to the area. earthing (15).