FR3065587A1 - DEVICE FOR LOCKING AN ELECTRIC CONTACT OF AN INTERCONNECTION MODULE. - Google Patents

Abstract

A locking cover (32) of an electrical contact (22) in a cavity (18) of a cylindrical insulation housing (20) of the electrical contact (22), the cover (32) being adapted to be mounted on the housing (20) comprises a hollow cylindrical body (34) open on either side having a cylindrical wall (38) extending in a vertical direction from a low end (40) to a high end (42). ), the cylindrical wall (38) of the cover (32) being provided to be mounted on the cylindrical wall (16) of the housing (20); the wall (38) of the cover (32) comprises a first locking means (35) provided for locking the cover (32) on the housing (20); the wall (38) of the cover comprises a second locking means (55) provided for locking the electrical contact (22) inserted into the cavity (18) of the housing (20).

Description

Holder (s): DELPHI INTERNATIONAL OPERATIONS LUXEMBOURG S.A R.L. Limited liability company.

Extension request (s)

Agent (s): DELPHI FRANCE SAS Simplified joint-stock company.

DEVICE FOR LOCKING AN ELECTRICAL CONTACT OF AN INTERCONNECTION MODULE.

FR 3 065 587 - A1 (5 /) A locking cover (32) of an electrical contact (22) in a cavity (18) of a cylindrical insulation housing (20) of the electrical contact (22), the cover (32) being designed to be mounted on the housing (20), comprises a hollow cylindrical body (34) open on either side comprising a cylindrical wall (38) extending in a vertical direction from a low end ( 40) up to a high end (42), the cylindrical wall (38) of the cover (32) being designed to be mounted on the cylindrical wall (16) of the housing (20); the wall (38) of the cover (32) comprises a first locking means (35) provided for locking the cover (32) on the housing (20); the wall (38) of the cover comprises a second locking means (55) provided for locking the electrical contact (22) inserted in the cavity (18) of the housing (20).

Device for locking an electrical contact of an interconnection module.

TECHNICAL AREA

The invention relates to the field of interconnection modules for motor vehicles and more particularly a device for locking an electrical contact of an interconnection module.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

Interconnection modules for motor vehicles, such as fuse boxes, generally include multiple cavities into which male or female electrical contacts crimped onto vehicle electrical harnesses are inserted. The electrical contacts connect the electrical elements of the interconnection module to the electrical components of the vehicle.

The cavities are generally delimited by a cylindrical wall forming an insulation box around the electrical contact. The wall of the housing generally comprises a means for locking the electrical contact inserted in the cavity.

The walls of the cavities in certain cases have openings making it possible to insert, for example, electric bus bars connecting various electrical elements of the interconnection module to one another. The electrical contacts are then inserted into the cavities and come into contact with the bus bars.

The openings in the walls weaken the walls and can also inadvertently jam the beam so as to weaken the electrical contacts.

In addition, in order to further secure the locking of the electrical contacts in the cavity of the isolation boxes, it is necessary to design additional means for locking the electrical contacts. However, the openings in the walls reduce the possibilities of designing effective additional locking means for the electrical contacts inserted in the cavity of the insulation boxes.

It is therefore important to offer a new solution to these problems.

SUMMARY OF THE INVENTION

According to the invention, a cover for locking an electrical contact in a cavity of a cylindrical insulation box for the electrical contact, the cover being designed to be mounted on the housing, comprises a hollow cylindrical body open on either side. the other comprising a cylindrical wall extending in a vertical direction from a low end to a high end, the cylindrical wall of the cover being designed to be mounted on the cylindrical wall of the housing. The wall of the cover comprises a first locking means provided for locking the cover on the housing. The wall of the cover comprises a second locking means provided for locking the electrical contact inserted in the cavity of the housing.

The first locking means may comprise a first elastic tongue comprising a hook intended to cooperate with a lug of the cylindrical wall of the housing so as to prevent extraction of the cover when it is mounted on the housing.

The cover may include a first stop stop intended to come into abutment against the upper end of the housing so as to block the vertical insertion of the cover on the housing.

The first stop may be a cylindrical rim at the top end of the hood.

The second locking means may comprise a second elastic tongue extending vertically towards a free end forming a protuberance oriented towards the inside of the cylindrical body of the cover, the protuberance forming a second stop intended to come into abutment against a surface. of the electrical contact inserted in the cavity of the housing so as to prevent extraction of the electrical contact from the cavity of the insulation housing.

The outer surface of the cylindrical wall of the cover may include a protective wall covering the second elastic tongue.

The cylindrical body of the cover may have a rectangular base so that the cover wall comprises four lateral faces, the first locking means being arranged on a first lateral face of the cover wall, the second locking means being arranged on a second side face of the cover wall adjacent to the first side face of the cover wall.

According to the invention, a housing for isolating an electrical contact comprises a cylindrical body of the housing comprising a through cavity provided for inserting the electrical contact, the cylindrical body of the housing comprising a cylindrical wall extending in a vertical direction from a lower end to an upper end. The wall of the housing includes a first locking means provided for locking a cover on the housing. The wall of the housing includes an opening provided for the insertion of a second locking means through the wall of the housing in order to lock the electrical contact inserted in the cavity of the housing.

The first locking means may include a lug designed to cooperate with a hook on the cover.

The opening may be formed by a vertical slot delimited on either side by a vertical border of the wall of the housing, the slot extending from the upper end to the lower end, the space between the two vertical edges of the wall of the housing being provided to arrange the second locking means through the wall of the housing.

The slot may include a first section extending from the upper end to a second section extending to the lower end, the space between the two vertical edges of the wall of the second section being reduced relative to at the space between the two vertical edges of the wall of the first section so as to form a step at the common end of the two sections forming a stop for the second locking means.

According to the invention, the assembly of the locking cover of an electrical contact described above with the insulation box of the electrical contact described above, is characterized in that the cylindrical wall of the cover is mounted on the wall cylindrical housing.

BRIEF DESCRIPTION OF THE DRAWINGS

Other characteristics, objects and advantages of the invention will appear on reading the detailed description which follows, and with reference to the appended drawings, given by way of non-limiting example and in which:

- Figure 1 is a schematic perspective view of an interconnection module comprising electrical contact isolation boxes fitted with electrical contact locking covers according to the invention.

- Figure 2 is a schematic view in longitudinal section of an electrical contact locked in the cavity of an insulation box by a locking cover of Figure 1.

- Figure 3 is a schematic perspective view of the locking cover locked on the electrical contact isolation box of Figure 2.

- Figure 4 is a schematic perspective view of the locking cover of Figure 2 without the protective wall.

- Figure 5 is a schematic view in longitudinal section of the electrical contact in the insertion phase in the cavity of the insulation box before locking by the locking cover of Figure 2.

- Figure 6 is a schematic perspective view of the insulation box of Figure 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

According to Figure 1, an interconnection module 10 for a motor vehicle is shown. In order to facilitate the description of the invention and without limitation, an orthonormal reference frame is defined comprising a longitudinal axis L, a transverse axis T and a vertical axis V. Orientations "bottom", "top", "top" , "Below", "lower" and "upper" are defined in the vertical direction.

The interconnection module 10 is generally of rectangular parallelepiped shape. It is generally positioned flat along a horizontal plane defined by the longitudinal axis L and the transverse axis T.

The upper face 12 of the module 10 is provided with a cover 14 comprising numerous housings allowing in particular the insertion of electrical elements such as fuses or switching relays. The upper face 12 of the module 10 is also provided with vertical cylindrical walls 16 comprising a cavity 18 making it possible to insert electrical connection contacts, in particular electrical contacts crimped onto conductive strands (not shown) of electrical harnesses. Each cylindrical wall 16 forms the body 19 of an insulation box 20 of an electrical contact. Each insulation box 20 therefore comprises a vertical cylindrical wall 16 of rectangular base extending from a lower end 28 to an upper end 30. The lower end 28 of the insulation box 20 is one end forming part of the upper face 12 of the cover 14 of the interconnection module 10.

The electrical contacts are kept locked in the cavities 18 of the cylindrical walls 16 by locking covers 32 arranged on the insulation boxes 20.

By way of example and without limitation, as illustrated in FIG. 2, the electrical contact 22 inserted in the cavity 18 comprises an electrical contact section 24 coming into contact with an electrical bus bar 26 electrically connecting various electrical elements of the interconnection module 10 between them such as fuses and electrical switching relays. The electrical contact 22 includes an electrical connection zone 25 intended to be crimped onto the stripped termination of a conductive strand. A flat support surface 76 allowing the electrical contact 22 to be locked in the cavity is arranged on the electrical contact 22, at the junction between the connection zone 25 and the electrical contact section 24.

According to FIG. 3, the locking cover 32 is locked on the insulation box 20.

Each locking cover 32 comprises a hollow cylindrical body 34 that has a rectangular base mounted on each cylindrical body 19 of the insulation boxes 20. Each cylindrical body 34 of the covers 32 opens out so that it can be mounted by sliding in the vertical direction around of each cylindrical body 19 of the insulation boxes 20 and so as not to obstruct the insertion of electrical contacts 22 into the cavity 18 of each insulation box 20.

The cylindrical body 34 of the cover 32 has a cylindrical wall 38 extending along the vertical axis from a low end 40 to a high end 42. The cylindrical body 34 of the cover 32 has a generally rectangular base so as to include four lateral faces 44, 46. The dimension, that is to say the length and the width, of the rectangular base of the cover 32 is adapted to the dimension of the rectangular base of the insulation box 20 so that the cylindrical wall 38 of the locking cover 32 can be mounted on the cylindrical wall 16 of the insulation box 20 and in that the four lateral faces 44, 46 of the cover 32 are all in contact with the cylindrical wall 16 of the housing insulation 20 when the locking cover 32 is mounted on the insulation box 20.

By way of example and without limitation, the cylindrical wall 38 of the cover 32 extends vertically over a length of about fifteen millimeters. The generally rectangular base of the cylindrical body 34 of the cover 32 is approximately of dimension, that is to say the length and the width, of some seventeen millimeters by fifteen millimeters.

A first lateral face 44 of the cover 32 comprises a first locking means 35 locking the cover 32 on the insulation box 20. More specifically, the first locking means 35 is formed by a first elastic tongue 36 extending vertically from the the upper end 42 of the cover 32 to its free end 48, the free end 48 of the first tongue 36 extending slightly beyond the lower end 40 of the cylindrical wall 38 of the cover 32. The end free 48 of the first tongue 36 has the shape of a hook 49 oriented towards the plane of the lateral face 45 opposite the first lateral face 44 so as to be able to lock the cover 32 on a lug 50 protruding towards the outside of the wall 16 of the insulation box 20.

By way of example and without limitation, the first tongue 36 has a vertical length of about nineteen millimeters.

According to the embodiment shown in Figure 3, the first tab 36 is of generally rectangular shape. The first tongue 36 came integrally with the locking cover 32. The first tongue 36 is arranged in continuity with the first lateral face 44 of the cylindrical wall 38 of the cover 32 so as to split the first face 44 into two parts. The first tongue 36 is therefore arranged between the first part and the second part of the first lateral face 44. In other words, the first tongue 36 is comparable to a cutout of the first lateral face 44. The thickness of the first tongue 36 is substantially similar to the thickness of the first lateral face 44 so that the first tongue 36 is substantially in the same plane as the first lateral face 44. The width of the tongue is a few millimeters. By way of example and without limitation, the tongue may be of a width of approximately three to four millimeters.

The first tongue 36 has a recess 52 over its entire vertical length, so that the edge of the free end 48 of the first tongue 36 is arranged under the lug 50 of the wall 16 of the housing 20. The lug 50 is arranged in the recess 52, so as to block the cover 32 against vertical extraction. The edge of the free end 48 of the first tongue 36 is slightly beveled vertically downwards towards the outside of the first lateral face 44 so as to facilitate the sliding of the edge of the free end 48 of the first tongue 36 on the lug 50 during assembly of the cover 32 on the insulation box 20. The edge of the free end 44 of the first tongue 36 acts as a hook 49 abutting under the lug 50, thus blocking the extraction cover 32.

Alternatively, the first tongue 36 can be shorter and can extend over the first lateral face 44 from another origin than the upper end 42 of the cover 32. The important thing is that the first tongue 36 is elastic and can come lock on the lug 50 of the insulation box 20.

According to Figure 3, the upper end 42 of the cylindrical wall 38 of the locking cover 32 has a cylindrical rim 54. The rim 54 is oriented towards the inside of the body 34 of the locking cover 32 and extends over the entire periphery of the upper end 42 of the cylindrical wall 38 of the cover 32. The rim 54 extends planarly towards inside the body 34 of the locking cover 32 so as to form a stop against the upper end 30 of the cylindrical wall 16 of the insulation box 20 when it is inserted around the insulation box 20. The cylindrical rim 54 therefore blocks the locking cover 32 against a vertical insertion going beyond the upper end 30 of the insulation box 20.

Alternatively, the upper end 42 of the cylindrical wall 38 of the locking cover 32 may have one or more flanges which do not extend over the entire periphery of the upper end 42.

The mounting of the locking cover 32 is done by vertical sliding of the cylindrical wall 38 of the cover 32 around the cylindrical wall 16 of the insulation box 20, the sliding causing friction of the cylindrical wall 38 of the cover 32 with the wall 16 cylindrical of the insulation box 20. The first tongue 36 is elastic so that the hook 49 can be arranged around the lug 50 when the locking cover 32 is mounted on the insulation box 20. The insertion of the locking cover 32 is blocked when the cylindrical rim 54 of the cover 32 abuts against the upper end 30 of the insulation housing 20.

According to FIG. 4, in order to lock the electrical contact 22 in the cavity 18 of the insulation box 20, a second lateral face 46 of the cover 32 comprises a second locking means 55. To facilitate the description of the second locking means, the Figure 4 locking cover has been shown without a protective wall (option described later) present in all the other figures and covering the second locking means.

The second locking means 55 comprises a second elastic tongue 56 extending vertically from a first end 58 slightly lower than the upper end 42 of the locking cover 32, that is to say a few millimeters lower than the high end 42 of the cover 32, up to its free end 60. The free end 60 of the second tab 56 extends slightly beyond the bottom end 40 of the second lateral face 46 of the cover 32. The second tab 56 came integrally with the locking cover 32. The second tab 56 is rectangular. The second tongue 56 is arranged in a rectangular opening in the second side face 46 extending from the first end 58 of the second tongue 56 to the bottom end 40 of the second side face 46. The second tongue 56 is comparable to a cutout of the second lateral face 46. Preferably, the second lateral face 46 is a face adjacent to the first lateral face 44 comprising the first tongue 36.

The free end of the second tongue forms a protrusion extending beyond the plane of the second lateral face 46 towards the plane of the lateral face 47 opposite to the second lateral face 46. The free end of the second tongue forms a stop intended to come against the flat bearing surface 76 of the electrical contact 22 in order to lock it in the cavity of the insulation box 20.

By way of example and without limitation, the free end 60 of the second tab 56 is distant from the high end 42 of the locking cover 32, along the vertical axis V, approximately twenty millimeters.

According to FIG. 2, the electrical contact is locked in the cavity of the insulation housing by the protuberance of the second tab, the protuberance 70 being arranged through the cylindrical wall 16 of the insulation housing 20.

More specifically, the second tongue 56 comprises an inner face 62 oriented towards the inside of the cylindrical body 34 of the locking cover 32, and an outer face 64 oriented towards the outside of the cylindrical body 34 of the locking cover 32.

The external face 64 of the second tongue 56 is in the same plane as the external face of the second lateral face 46.

The inner face 62 of the second tongue 56 has a first part 66 extending vertically in a planar manner from the first end 58 of the second tongue 56 to a second end located approximately at mid-vertical length of the second tongue 56. inner face 62 of the second tongue comprises a second part 68 in continuity with the first part 66, the second part 68 extending from the second end to the free end 60 of the second tongue 56.

The first part 66 of the second tongue 56 has a thickness substantially similar to the thickness of the second lateral face 46, so that the internal face 62 of the first part 66 is in the plane of the internal face of the second lateral face 46.

The second part 68 forms the protuberance 70 projecting towards the plane of the lateral face 47 opposite the second lateral face 46. The protuberance 70 of the second part 68 of the second tongue 56 extends over the entire vertical length of the second part 68. The free end 60 of the second tab 56 forms a part of the protuberance 70. The free end 60 forms a rectangular flat bottom surface 72 extending beyond the plane of the second lateral face 46 towards the plane from the side face 47 opposite the second side face 46. The width of the second tongue 56 forms the width of the lower surface 72. The lower surface 72 extends towards the plane of the side face 47 opposite the second side face 46 to a stop end 74 along a length ίο sufficient to form a stop stop against the flat support surface 76 of the electrical contact 22 inserted in the cavity 18 of the bo tier insulation 20 on which the locking cap 32 is mounted. The stop stop prevents the extraction of the electrical contact 22.

By way of example and without limitation, the lower surface 72 extends up to a third of the length separating the second lateral face 46 and its opposite face 47 in a direction almost perpendicular to the second lateral face 46.

The protrusion 70 has a flat surface inclined 78 along the vertical axis V in the direction of the stop end 74 extending from the second end of the first part 66 towards the stop end 74. The junction between the flat surface inclined 78 and the lower surface 72 is produced by a surface comparable to a chamfer 80 so as not to have a sharp edge at the junction between the inclined flat surface 78 and the lower surface 72 so as not to damage the electrical contact 22 locked by the protuberance 70.

According to FIG. 5, when the electrical contact is in the insertion phase in the cavity of the housing equipped with the locking cover, the second elastic tongue inclines relative to the vertical axis towards the exterior of the wall 16 of the housing of insulation 20 and therefore towards the outside of the second lateral face 46.

The inclined flat surface 78 of the protuberance 70 is designed to come into contact with the electrical contact section 24 of the electrical contact 22 when it is inserted vertically in the direction D into the cavity 18 of the insulation housing 20, so that during from the insertion of the electrical contact 22, the sliding of the electrical contact 22 on the inclined flat surface 78 of the protuberance 70 causes the second tongue 56, and therefore of the protuberance 70, to tilt towards the exterior of the wall 16 of the insulation box 20 and therefore towards the outside of the second lateral face 46. The inclined flat surface 78 of the protuberance 70 acts as a control ramp.

When the electrical contact 22 is fully inserted, in the cavity 18, according to FIG. 2, that is to say arranged in the locked position, the second tab 56 returns to its initial position so that the lower surface 72 of the second tongue 56 bears on the bearing surface 76 of the electrical contact

22.

According to Figure 3, the outer surface of the second side face 46 of the cylindrical wall 38 of the locking cover 32 has a protective wall 82 covering the second tongue 56. More particularly, according to the embodiment shown, the protective wall 82 comprises a first wall 84 vertically covering the second tongue 56 and a second wall 86 horizontally covering the first end 58 of the second tongue 56.

The first wall 84 connects the two vertical edges of the rectangular opening of the second lateral face 46. The first wall 84 extends vertically over the entire length of the vertical edges. The first wall 84 is curved towards the outside of the second lateral face 46 so as to leave a free space 88 between the first wall 84 and the second tongue 56. The first wall 84 therefore partially partially covers the second tongue 56; the free end 60 of the second tongue 56 extending beyond the lower end 40 of the second lateral face 46.

The free space 88 provides sufficient space between the second tongue 56 and the first wall 84 so as not to block the inclination of the second tongue 56 towards the outside of the wall of the insulation box 20 and therefore towards the outside of the second lateral face 46 when the electrical contact 22 is inserted into the cavity 18 of the insulation box 20.

The protective wall 82 therefore partially covers the second tongue 56, thus avoiding any manual action by an operator on the second tongue 56 during the insertion of the electrical contact 22 into the cavity 18 of the insulation box 20 fitted with the locking cover. 32.

The protective wall 82 is not essential to the invention. The locking cover 32 can be designed without the protective wall 82. The protective wall 82 does not directly interfere with the locking of the cover 32 on the housing 20 as well as with the locking of the electrical contact 22 on the cover 32. The protective wall 82 makes it difficult to interact between a manual operation and the second locking tab 56.

According to Figure 6, the cylindrical wall 16 of rectangular base of the insulation housing 20 has four side faces 90, 92. The four side faces 90, 92 extend from the upper end 30 of the housing 20 to the lower end 28 of the housing 20. In other words, the four lateral faces 90, 92 of the insulation housing 20 extend vertically from the upper face of the cover 12 to their upper end 30.

A first lateral face of the housing 90 comprises the lug 50 cooperating with the hook 49 of the first tongue 36 of the locking cover 32, thus allowing the locking of the cover 32 on the insulation housing 20.

A second lateral face 92 of the insulation box 20 comprises a vertical opening 94 delimited on either side by a vertical border 96, 98 of the second lateral face 92. The vertical opening 94 forms a vertical slot 100 extending from the upper end 30 of the second lateral face 92, to the lower end 28 of the second lateral face 92. Preferably, the second lateral face 92 is adjacent to the first lateral face 90. Preferably, the slot 100 is arranged in the center of the second lateral face 92 of the insulation box 20. The vertical slot 100 is delimited on either side by the vertical border 96, 98 of the second lateral face 92.

According to the embodiment, the slot 100 extends vertically in continuity along a first section 102 from the upper end 30 of the housing 20 to a second section 104 extending to the lower end 28 of the housing 20 The space between the two vertical edges 96, 98 of the first section 102, that is to say the width of the first section 102, is just dimensioned so that the protuberance 70 of the second tongue 56 of the cover of lock 32 can be inserted vertically. The space between the two vertical edges 106, 108 of the second section 104, that is to say the width of the second section 104, is relatively reduced compared to the space between the two vertical edges 96, 98 of the first section 102 so as to form a step 110, 112 at the common end of the two sections 102, 104 forming a stop for the free end 60 of the second tongue 56. The space between the two vertical edges 106, 108 of the second section 104 is just sized to slide in this space the electric busbar 26 electrically connecting various electrical elements of the interconnection module 10 to each other such as fuses and electrical switching relays.

More particularly, the first section 102 of the slot 100 and the second section 104 of the slot 100 are centered vertically along the same vertical axis of symmetry S. The junction between each edge 96, 98 of the first section 102 with each edge 106, 108 of the second section 104 forms the step 110, 112 inside the first section 102 so that the counter step 114, 116 is formed by each edge 106, 108 of the second section 104. The two steps 110, 112 formed by the restriction of the width of the slot together form the stop of the free end 60 of the second locking tab 56 of the locking cover 32.

Claims (12)

E Locking cover (32) of an electrical contact (22) in a cavity (18) of a cylindrical insulation housing (20) of the electrical contact (22), the cover (32) being designed to be mounted on the housing (20), characterized in that the cover (32) comprises a hollow cylindrical body (34) open on either side comprising a cylindrical wall (38) extending in a vertical direction from a low end (40 ) up to an upper end (42), the cylindrical wall (38) of the cover (32) being designed to be mounted on the cylindrical wall (16) of the housing (20); the wall (38) of the cover (32) comprises a first locking means (35) provided for locking the cover (32) on the housing (20); the wall (38) of the cover comprises a second locking means (55) provided for locking the electrical contact (22) inserted in the cavity (18) of the housing (20). 2. Locking cover (32) according to claim 1, characterized in that the first locking means (35) comprises a first elastic tongue (36) comprising a hook (49) provided to cooperate with a lug (50) of the cylindrical wall (16) of the housing (20) so as to prevent extraction of the cover (32) when it is mounted on the housing (20). 3. Locking cover (32) according to any one of the preceding claims, characterized in that the cover (32) comprises a first stop stop (54) intended to come into abutment against the upper end (30) of the housing (20) so as to block the vertical insertion of the cover (32) on the housing (20). 4. Locking cover (32) according to claim 3 characterized in that the first stop stop (54) is a cylindrical flange of the upper end (42) of the cover (32). 5. Locking hood (32) according to any one of the preceding claims, characterized in that the second locking means (55) comprises a second elastic tongue (56) extending vertically towards a free end (60) forming a protuberance (70) oriented towards the inside of the cylindrical body (34) of the cover (32), the protuberance (70) forming a second stop stop intended to come into abutment against a bearing surface (76) of the electrical contact ( 22) inserted into the cavity (18) of the housing (20) so as to prevent extraction of the electrical contact (22) from the cavity (18) of the insulation housing (20). 6. Locking cover (32) according to claim 5 characterized in that the outer surface of the cylindrical wall (38) of the cover (32) comprises a protective wall (82) covering the second elastic tongue (56). 7. Locking cover (32) according to any one of the preceding claims, characterized in that the cylindrical body (34) of the cover (32) is of rectangular base so that the wall (38) of the cover (32) includes four side faces (44, 46); the first locking means (35) being arranged on a first lateral face (44) of the wall (38) of the cover (32); the second locking means (55) being arranged on a second lateral face (46) of the wall (38) of the cover (32) adjacent to the first lateral face (44) of the wall (38) of the cover (32). 8. Isolation housing (20) of an electrical contact (22) comprising a cylindrical body (19) of housing comprising a through cavity (18) intended to insert the electrical contact (22), the cylindrical body (19) of housing (20) having a cylindrical wall (16) extending in a vertical direction from a lower end (28) to an upper end (30), characterized in that the wall (16) of the housing (20) comprises first locking means (50) provided for locking a cover (32) on the housing (20); the wall (16) of the housing (20) comprises an opening (94) provided for the insertion of a second locking means (70) through the wall (16) of the housing (20) in order to lock the electrical contact (22) inserted in the cavity (18) of the housing (20). 9. Insulation housing (20) according to claim 8 characterized in that the first locking means (50) comprises a lug provided to cooperate with a hook (49) of the cover (32). 10. Insulation housing (20) according to any one of claims 8 to 9 characterized in that the opening (94) is formed by a vertical slot (100) delimited on either side by an edge ( 96, 98) vertical to the wall (16) of the housing (20), the slot (100) extending from the upper end (30) to the lower end (28), the space between the two vertical edges (96, 98) of the wall (16) of the housing (20) being provided to arrange the second locking means (70) through the wall (16) of the housing (20). 11. Insulation housing (20) according to claim 10, characterized in that the slot (100) comprises a first section (102) extending from the upper end (30) to a second section (104) extending to the lower end (28), the space between the two vertical edges (106, 108) of the wall (16) of the second section (104) being reduced relative to the space between the two vertical edges (96,98) of the wall (16) of the first section (102) so as to form a step (110) at the common end of the two sections (102, 104) forming a stop for the second locking means (56). 12. Assembly of a locking cover (32) of an electrical contact (22) according to any one of claims 1 to 7 with an insulation box (20) of the electrical contact (22) according to any one claims 8 to 11; the cylindrical wall (38) of the cover (32) being mounted on the cylindrical wall (16) of the housing (20). 1/4 σ> co CM