Electrical contact for male electrical connector

Abstract

To provide an improved solution for sealing a male electrical connector with an electrical contact pin of rectangular cross-section.SOLUTION: The present invention relates to an electrical contact for a male electrical connector (100). The electrical contact (103a) includes an electrical contact pin (107a, 107b) and an O-ring (109a, 109b). The pin (107a, 107b) includes a first portion, a second portion, and a narrowed portion adapted to accommodate the O-ring (109a, 109b) between the first portion and the second portion, the O-ring (109a, 109b) being arranged at the pin (107a, 107b) so as to be accommodated in the narrowed portion. The present invention also relates to an electrical contact pin (107a, 107b), a connector housing (101), and a male electrical connector (100).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electrical contact for a male electrical connector. The present invention also relates to an electrical contact pin, a connector housing, and a male electrical connector.

Background Art

[0002] In the field of electrical connections, it is known to provide an electrical connector having at least one electrical contact pin and referred to as a male electrical connector, and a mating electrical connector having at least one mating electrical terminal, for example an electrical contact terminal, and referred to as a female electrical connector. Generally, the electrical contact pin is configured to establish electrical contact and includes a first portion disposed at a first end of the pin and a second portion configured to connect the pin to a conductor and disposed at a second end of the pin. Usually, the first portion may have a rectangular cross-section in a plane perpendicular to the elongation direction of the pin.

[0003] To seal the configuration of the electrical contact pin in the housing of the male electrical connector, a particular solution provides for providing a rectangular seal on the electrical contact pin, the rectangular seal being shaped to have a particular shape that matches the corresponding rectangular cross-section of the first portion. Thus, each type of rectangular cross-section requires a corresponding rectangular seal. Another, more expensive solution provides for potting the pins installed in the male electrical connector housing.

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the premise of the above, it is an object of the present invention to propose an improved solution for sealing a male electrical connector having an electrical contact pin with a rectangular cross-section.

Means for Solving the Problems

[0005] The object of the present invention is achieved by an electrical contact for a male electrical connector according to the present invention. The electrical contact according to the present invention comprises an electrical contact pin and an O-ring. The pin comprises a first portion configured to establish electrical contact with a mating electrical terminal, the first portion being arranged at a first end of the pin and having a rectangular cross-section in a plane orthogonal to the extending direction of the pin. The pin also comprises a second portion configured to connect the pin to a conductor, the second portion being arranged at a second end of the pin opposite the first end. The pin further comprises a constriction adapted to accommodate the O-ring between the first portion and the second portion. The O-ring is arranged on the pin so as to be accommodated in the constriction.

[0006] By configuring an electrical contact pin having a constriction adapted to accommodate an O-ring, an O-ring can be provided on the electrical contact pin despite the rectangular cross-section of its first portion. Thus, the risks associated with the installation of the O-ring in the rectangular cross-section of the first portion, in particular the risk of damage to the O-ring by the edges of the pin having a rectangular cross-section, and the risk of loss of sealing performance on the side surface of the pin having a rectangular cross-section, are reduced or, in some cases, eliminated.

[0007] Accordingly, the present invention provides a sealing solution for pins having a rectangular cross-section that is less expensive than those known from the prior art without causing a risk of deterioration related to loss of durability or sealing performance. On the other hand, the present invention can also achieve an increase in sealing performance compared to more expensive solutions of the prior art.

[0008] According to one aspect of the present invention, the constriction may have a rounded cross-section having a shape configured to fit the O-ring in a plane orthogonal to the extending direction of the pin. In this configuration, the constriction is further better adapted to accommodate the O-ring in a sealable manner.

[0009] According to one aspect of the present invention, the constriction may have an oval cross-section, or an elliptical cross-section, or a cross-section having two parallel sides, with the two parallel sides connecting two arcs arranged at both ends on their both sides therebetween. In particular, the arcs may be two circular arcs, for example semi-circular arcs. According to another aspect of the present invention, the constriction may have a cross-section having four parallel sides of 2×2, with the four parallel sides of 2×2 connecting four arcs arranged at their intersections, in particular four quarter semi-circular arcs, therebetween. Thus, the O-ring accommodated in the constriction can more favorably conform to the shape of the cross-section of the constriction, and the sealing performance of the accommodation of the O-ring in the constriction can be improved.

[0010] According to one aspect of the present invention, the pin may be provided with a first recess on a first side surface of the pin corresponding to a first length of a rectangular cross-section of a first portion, and may be provided with a second recess on a second side surface of the pin opposite to the first side surface, on the side opposite to the first recess, and the first recess and the second recess together form a constriction. The first length of the rectangular cross-section may correspond to the thickness of the first portion of the electrical contact pin. By forming two opposite recesses, a constriction capable of accommodating an O-ring more reliably than in the case of, for example, a single recess can be obtained. In particular, in this configuration, the movement of the O-ring along the extending direction of the pin can be prevented.

[0011] According to one aspect of the present invention, the first recess and / or the second recess may have a depth between 100% and 300%, preferably between 150% and 250%, of the first length of the rectangular cross-section of the first portion. With a recess of this depth, the housing of the O-ring can be made highly reliable enough not to cause the risk of its movement along the extending direction of the pin without impairing the structural integrity of the pin and / or the elasticity of the O-ring.

[0012] According to one aspect of the present invention, the first recess and / or the second recess may have a depth between 10% and 40%, preferably between 20% and 30% of a second length orthogonal to the first length of the rectangular cross-section of the first portion. The second length of the rectangular cross-section may correspond to the width of the first portion of the electrical contact pin. For example, when the electrical contact pin is of the tab type, the first length, i.e., the thickness, may be smaller than the second length orthogonal to the first length, i.e., the width, especially more than 80% smaller. Also, in this configuration, the O-ring housing can be made more reliable without impairing the integrity of the electrical contact.

[0013] According to one aspect of the present invention, the edges of the first recess and / or the second recess may be rounded, especially rounded along an oval or elliptical or circular arc. Thus, the risk of weakening of the O-ring when installed on the pin for accommodation in the constriction can be reduced.

[0014] The present invention also relates to an electrical contact pin for an electrical contact according to one of the above-described aspects. The pin is a first portion configured to establish electrical contact with a mating electrical terminal, the first portion being arranged at the first end of the pin and having a rectangular cross-section in a plane orthogonal to the extending direction of the pin, a first portion, a second portion configured to connect the pin to a conductor, the second portion being arranged at the second end of the pin opposite the first end, a second portion, and a constriction adapted to accommodate an O-ring between the first portion and the second portion. This pin can be mounted on an electrical contact according to one of the above-described aspects, thereby benefiting from the respective advantages of the aspects of the electrical contact.

[0015] The present invention further provides a connector housing for a male electrical connector. The housing forms a cavity configured to accommodate an electrical contact according to one of the above-described aspects, and has a first surface provided with an opening leading to the cavity. The opening has a rectangular cross-section configured to receive the electrical contact pins of the electrical contact. The connector housing includes a protrusion that extends along the periphery of the opening to form a sealing seat and has a shape configured to fit an O-ring accommodated in the constriction of the pin. The protrusion and the sealing seat can further stabilize the arrangement of the O-ring accommodated in the constriction.

[0016] The object of the present invention is further achieved by a male electrical connector comprising such a housing and an electrical contact according to one of the above-described aspects. The pin is accommodated in the cavity such that a second portion is disposed inside the housing and a first portion is disposed outside the housing. The O-ring is accommodated in the sealing seat of the housing so as to fit the shape of the protrusion extending along the periphery of the opening.

[0017] Therefore, without losing the sealing performance, the installation of the electrical contact pins to the connector housing can be sealed more quickly and inexpensively compared to the prior art solutions.

[0018] According to one aspect of the present invention, the male electrical connector may include a holding element that surrounds the electrical contact pin and is fixed to the protrusion so as to close the internal space formed by the protrusion. Thereby, the installation of the electrical contact to the connector housing can be further stabilized and sealed.

[0019] According to one aspect of the present invention, the holding element may be fixed to the outer surface of the protrusion, particularly by form-fitting means. Thereby, the electrical contact can be manually locked by the holding element, and in particular, the locked state can be visually confirmed.

[0020] The objects, features, and advantages of the present invention as outlined above will be more comprehensively understood and evaluated by considering the following more detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0022] The technical features and attendant advantages of the embodiments described below may be freely combined one by one or adapted to a specific embodiment as long as the gist of the present invention as described above is respected.

[0023] Hereinafter, the same reference numerals in the drawings and the description are used to refer to elements of the same nature. Unless otherwise specified in the text, the objects shown in the drawings are not drawn to a fixed scale relative to each other, nor are they drawn to a fixed scale in their Cartesian dimensions relative to each other.

[0024] Figure 1 shows an exploded view of a male electrical connector according to a first embodiment of the present invention. According to this first embodiment, the electrical connector 100 is a power connector for vehicle use, particularly in the field of electric motor vehicles. The electrical connector 100 includes a connector housing 101, two identical electrical contacts 103a, 103b, and two identical holding elements 105a, 105b. In this embodiment, the two electrical contacts 103a, 103b are identical to each other, and the two holding elements 105a, 105b are also identical to each other. Therefore, hereinafter, only a single electrical contact 103a and a single holding element 105a will be described. Each electrical contact 103a, 103b includes electrical contact pins 107a, 107b and O-rings 109a, 109b.

[0025] The connector housing 101, the electrical contacts 103a, 103b, and the electrical contact pins 107a, 107b will be described hereinafter as part of the electrical connector 100 according to the first embodiment of the present invention. However, it should be noted that the connector housing 101 is also a connector housing for a male electrical connector according to a second embodiment of the present invention, and each electrical contact 103a, 103b is also an electrical contact for a male electrical connector according to a third embodiment of the present invention. Similarly, each electrical contact pin 107a, 107b is also an electrical contact pin according to a fourth embodiment of the present invention.

[0026] The connector housing 101 is made of an elastomer so as to form, for each of the electrical contacts 103a, 103b, a cavity configured to accommodate the respective electrical contacts 103a, 103b as particularly shown in FIG. 3. The housing 101 has a first outer surface 111, for each of the electrical contacts 103a, 103b, with an opening leading to each of the cavities as shown in FIG. 3. The housing 101 includes projecting portions 113a, 113b that project outward from the first surface 111 of the housing 101 in the connection direction 115 of the connector 100 for each of the electrical contacts 103a, 103b. Each of the projecting portions 113a, 113b extends along the respective perimeters 117a, 117b of the openings, thereby forming a closed edge portion around each of the openings.

[0027] Each of the projecting portions 113a, 113b includes a plurality of, in this example two, fixing elements for fixing a holding element such as one of the holding elements 105a, 105b. In the present embodiment, the fixing elements are projections 119a, 119b formed on the outer surfaces 121a, 121b of the respective projecting portions 113a, 113b. The projections 119a, 119b are configured as form-fitting means for fixing the holding elements 105a, 105b to the respective projecting portions 113a, 113b. Specifically, each of the projections 119a, 119b is configured to elastically deflect the respective legs 123a, 123b, 123c, 123d of the holding elements 105a, 105b during installation of the holding elements 105a, 105b until form engagement occurs by accommodation of the hooks 125a, 125b of the rearward legs 123a, 123b of the projections 119a, 119b. This form engagement will be further described with reference to FIG. 3.

[0028] Next, referring to FIG. 2, the electrical contact pin 107a for the connector 100 will be described. The pin 107a is a metal part extending along the extending direction 200, preferably made of a copper alloy. The pin 107a includes a first portion 201, a constricted portion 203, and a second portion 205 in the extending direction 200. The constricted portion 203 is disposed between, i.e., sandwiched between, the first portion 201 and the second portion 203 and is adapted to accommodate the O-rings 109a, 109b. The first portion 201 is disposed at the first end 207 of the pin 107a, the second portion is disposed at the second end 209 of the pin 107a, and the second end 209 is on the opposite side of the first end 207.

[0029] The electrical contact pin 107a is a tab-type pin punched from a thin metal plate, in this example a copper alloy. Alternatively, the pin 107a may be manufactured by milling. The first portion 201 of the pin 107a has a rectangular cross-section in a plane orthogonal to the extending direction 200. The rectangular cross-section has a first length 211 and a second length 213 orthogonal to the first length. The first length 211 corresponds to the thickness of the pin 107a in the first portion 201, particularly the thickness of the thin metal plate used. The second length 213 corresponds to the width of the pin 107a in the first portion 201. In this embodiment, the second length 213 is at least 6 times, preferably 7 to 10 times larger than the first length corresponding to the thickness 211 of the pin 107a.

[0030] In this embodiment, the thickness of the pin 107a is substantially uniform along the extending direction 200. The width of the pin 107a is not uniform. In particular, the second length 213, i.e., the width of the pin 107a in the first portion 201, is 3% to 10% larger than the width 215 of the pin in the second portion 205.

[0031] The first portion 201 is configured to establish electrical contact with a mating electrical terminal when the male electrical connector 100 mates with a female electrical connector. The second portion 205 is configured to connect the pin 107a to a conductor, particularly for crimping or welding with the conductive core of a cable.

[0032] The second portion 205 further includes a central rectangular perforation 217. A portion of the second portion 205 adjacent to the central rectangular perforation 217 is partially cut and bent with respect to the other portion of the second portion 205 to form a locking tab 219 for locking the pin 107a to the housing 101. The locking of the pin 107a by the locking tab 219 will be further described with reference to FIG. 3.

[0033] A first recess 221 is formed between the first portion 201 and the second portion 205 on a first side surface 223 of the pin 107a between the first portion 201 and the second portion 205. A second recess 225 is formed between the first portion 201 and the second portion 205 on a second side surface 227 of the pin 107a opposite to the first side surface 223, on the side opposite to the first recess 221. The first side surface 221 and the second side surface 223 correspond to the thickness of the pin 107a, i.e., the side surface of the first length 211. Both the first recess 221 and the second recess 223 form a constriction 203. Thus, the constriction 203 has a thickness corresponding to the first length 211 and a width 229 smaller than the width 213 of the first portion 201 and the width 215 of the second portion 205.

[0034] The edges of the recesses 221, 225 are machined to be rounded. Thus, the constriction 203 has a rounded cross-section at the width 229, i.e., in a plane perpendicular to the extending direction 200. The shape of the rounded cross-section will be further described with reference to FIG. 4. FIG. 2 shows an enlarged view of the pin 107a in the first recess 221, where the edge 231 of the recess 221 extending in a direction parallel to the extending direction 200 is rounded, and the edges 233, 235 of the recess 221 extending in a direction perpendicular to the extending direction 200 are also rounded. The rounded edge 231 of the constriction 203 allows O-rings such as the seals 109a, 109b to be received in the constriction 203 to fit the shape of the rounded cross-section of the constriction 203. That is, the rounded shape of the cross-section of the constriction 203 at the width 229 is configured to fit the O-rings 109a, 109b.

[0035] In this embodiment, the edges 231, 233, 235 are rounded in an elliptical shape in this example. In a modified example, the edges 231, 233, 235 may be rounded in an oval or circular shape. Therefore, the rounding of the edges 231, 233, 235 corresponds to an optional chamfering step of the ridge portion of the pin 107a, as shown by the chamfered portion 237 in FIG. 2, either separately or additionally.

[0036] In this embodiment, the depressions 221, 225 have a depth 237 in a direction perpendicular to the extending direction 200, between 10% and 40%, preferably between 20% and 30%, of the second length 213 of the first portion 201. Similarly, the depth 237 of the depressions 221, 225 is further between 100% and 300%, preferably between 150% and 250%, of the thickness of the first portion 201, that is, the first length 211.

[0037] FIG. 3 shows a cross-sectional view of the male electrical connector 100 in an assembled state along the cross-section line 127 shown in FIG. 1. The electrical contact 103a is installed in the connector housing 101. Specifically, the electrical contact pin 107a is received in the cavity 301 such that the second portion 205 is disposed inside the cavity 301 and the first portion 201 is disposed outside the cavity 301 and the housing 101, and is configured to receive the pin 107a.

[0038] For this purpose, the pin 107a is inserted into the cavity 301 through the opening 303 in the first surface 111 of the housing 107 along the insertion direction 300 that is parallel to the extending direction 200 and opposite to the connection direction 115. In order to be able to accommodate the pin 107a in the insertion direction without losing the sealing property, the opening 303 has a rectangular cross-section that substantially has the dimensions of the second portion 205 of the pin 107a, particularly the thickness 211 and the width 215.

[0039] By inserting the pin 107a through the opening 303, the lock tab 219 elastically flexes until it passes beyond the opening 303 and then returns to its transverse rest state, thereby engaging in shape with the inner edge 305 of the housing 101.

[0040] The protrusion 113a extending along the periphery 117a of the opening 303 is formed such that the outer surface 121a of the protrusion 113 has protrusions 119a, 119c. Further, the protrusion 113a is formed such that the inner surface 307 of the protrusion 113a defines an internal open space 309. The space 309 is a sealing seat for the O-ring 109a as will be described below with reference to FIG. 4.

[0041] FIG. 3 shows, as in FIG. 1, the electrical contact 103a in an assembled state with an O-ring 109a provided on the electrical contact pin 107a. The O-ring 109a is received in the constriction 203 of the pin 107a. For this purpose, the O-ring 109a elastically expands until it returns to a more contracted rest state in the depressions 221, 225 and slides over the first portion 201. In this case, the O-ring 109a is a rubber O-ring of, for example, the vinyl methyl siloxane (VMQ) type or the ethylene propylene diene monomer (EPDM) type.

[0042] The connector 100 as shown in the assembled state in FIG. 3 includes a holding element 105a and a central portion 311 from which legs 123b, 123d extend. Each leg 123b, 123d includes hooks 125b, 125d disposed at respective ends of the legs 123b, 123d. The central portion 311 includes a through slot 313 having substantially the dimensions of the rectangular cross-section of the first portion 201 of the electrical contact pin 107a, in particular the thickness 211 and the width 213. Thus, the holding element 105a is configured to slide over the first portion 201 of the pin 107a through the through slot 313 passing through the central portion 311.

[0043] When the retaining element 105a slides onto the pin 107a, the legs 123b, 123d approach the protrusion 113a and elastically flex on the protrusions 119a, 119c, so that when passing over the protrusions 119a, 119c, a form fit can be formed between the protrusions 119a, 119c and the hooks 125b, 125d. The hooks 125b, 125d and the protrusions 119a, 119c are complementary elements of a form-fitting means for fixing the retaining element 105a in the connector housing 101.

[0044] Thus, the retaining element 105a surrounds the pin 107a, in particular the constriction 203 of the pin 107, and is fixed to the protrusion 113a. The central part 311 closes, in particular seals, the open inner space 309 of the sealing seat, thereby enhancing the sealing of the installation of the electrical contact 103 and stabilizing the contact 103a.

[0045] FIG. 4 shows a cross-sectional view of the male electrical connector 100 along the section line 315 of FIG. 3. Specifically, FIG. 4 shows the cross-section of the connector 100 in the assembled state at the protrusion 113a. Thus, the cross-section of the O-ring 109a and the cross-section 400 of the pin 107a are shown. The cross-section 400 of the pin 107a is a cross-section in a plane perpendicular to the extending direction 200 of the pin 107a.

[0046] As also explained with reference to FIG. 2, the constriction 203 is machined to have a rounded cross-section 400. In particular, FIG. 4 shows that the rounded cross-section 400 is, in the present embodiment, a stadium-shaped cross-section, i.e., a cross-section having two parallel sides 401a, 401b, and two elliptical arcs 403a, 403b arranged at both ends on both sides thereof connecting between them. In this case, the arc 403b corresponds to the edge 231 of FIG. 2. In a variant, the cross-section 400 may have four parallel sides in a 2×2 arrangement, and four quarter semi-circular arcs arranged at their intersections may connect between the four parallel sides in a 2×2 arrangement.

[0047] With the rounded cross-section 400, the constriction 203 is particularly adapted for the accommodation of the O-ring 109a. In particular, the cross-section 400 has a shape configured such that the O-ring 109 fits. In this case, the pin 107a is provided with an O-ring 109a accommodated in the constriction 203, and the O-ring 109a conforms to the cross-section 400, i.e., the outer shape, of the constriction 203.

[0048] In this configuration, due to the rectangular cross-section of the first portion 201 of the pin 107a, the O-ring 109a can seal the insertion of the pin 107a into the opening 303a without losing the sealing performance or durability. In other words, the radial sealing performance and cost efficiency of the O-ring are adapted to a male electrical connector having a pin with a rectangular cross-section. Thus, the present invention provides an improved solution for sealing the installation of a pin having a rectangular cross-section into an electrical connector housing. As an example, with a conventional O-ring, a sealing performance up to IP54 can be achieved.

[0049] The inner surface 307 of the protrusion 113a forming the open inner space 309 has a shape configured such that the O-ring 109a fits. In particular, in a plane orthogonal to the insertion direction 300, the open inner space 309 has a stadium-shaped cross-section corresponding to the shape and thickness 405 of the seal 109a when accommodated in the constriction 203. That is, the protrusion 113a is shaped to surround the O-ring 109a such that the O-ring 109a can be sealingly fitted to the inner surface 307. Thus, as shown in FIG. 4, the O-ring 109a is accommodated in the sealing seat 309 of the housing 101 so as to conform to the shape of the protrusion 113a. Thus, the sealing performance of the connector 100 is improved and the O-ring 109a is protected from external environmental effects.

[0050] In a modification of the connector 100, the male electrical connector of the present invention may include only a single electrical contact. Alternatively, the male electrical connector may include a plurality of electrical contacts, for example, three, six, or eight. In other modifications, the electrical connector may not include holding elements such as the holding elements 105a, 105b. In other modifications, locking means for the contact pins 107a, 107b different from or in addition to the present lock tab system 219 may be considered.

Explanation of Signs

[0051] 100 Male electrical connector 101 Connector housing 103a, 103b Electrical contacts 105a, 105b Holding elements 107a, 107b Contact pins 109a, 109b O-rings 111 First surface of the housing 113a, 113b Protrusions on the first surface 115 Connection direction 117a, 117b Around the opening 119a, 119b, 119c Protrusions on the protrusion 121a, 121b Outer surfaces of the protrusion 123a, 123b, 123c, 123d Legs of the holding element 125a, 125b, 125c, 125d Hooks of the legs 127 Section line in FIG. 3 200 Extending direction of the pin 201 First part 203 Narrow part 205 Second part 207 First end 209 Second end 211 First length of the cross-section of the first part 213 Second length of the cross-section of the first part 215 Perforated part in the second part 219 Lock tab 221 First depression 223 First side 225 Second depression 227 Second side 229 Width of the constriction 231 Edge of the longitudinal depression 233 First edge of the orthogonal depression 235 Second edge of the orthogonal depression 237 Chamfer at the ridge of the pin 239 Depth of the depression 300 Insertion direction 301 Cavity in the housing 303 Opening on the first face of the housing 305 Inner edge in the housing 307 Inner face of the protrusion 309 Open internal space defined by the protrusion 311 Central part of the holding element 313 Through slot in the central part 315 Section line in Figure 4 400 Rounded cross-section of the constriction 401a, 401b Parallel sides 403a, 403b Arcs connecting the parallel sides 405 Thickness of the O-ring

Claims

1. An electrical contact for a male electrical connector (100), comprising: The electrical contacts (103a, 103b) - electrical contact pins (107a, 107b), - O-rings (109a, 109b), The pins (107a, 107b) are - a first portion (201) configured to establish an electrical contact with a matching electrical terminal, said first portion (201) being arranged at a first end (207) of said pin (107a, 107b) and having a rectangular cross section in a plane perpendicular to the extension direction (200) of said pin (107a, 107b); - a second part (205) configured to connect said pins (107a, 107b) to an electrical conductor, said second part (205) being arranged at a second end (209) of said pins (107a, 107b) opposite said first end (207); - between said first portion (201) and said second portion (205), a constriction (203) adapted to receive an O-ring (109a, 109b); Equipped with The O-rings (109a, 109b) are arranged on the pins (107a, 107b) so as to be received in the narrowed portion (203). Electrical contacts.

2. the constriction (203) has, in a plane perpendicular to the extension direction (200) of the pins (107a, 107b), a rounded cross section (400) having a shape adapted to accommodate an O-ring (109a, 109b); 2. The electrical contact of claim 1.

3. the constriction (203) has an oval or elliptical cross section or a cross section (400) with two parallel sides, said parallel sides connecting two arcs, in particular two circular arcs, located at the opposite ends of said parallel sides, 3. The electrical contact of claim 2.

4. a first recess (221) on a first side (223) of the pin (107a, 107b) corresponding to a first length (211) of the rectangular cross section of the first portion (201), and a second recess (225) on a second side (227) of the pin (107a, 107b) opposite the first side (223) to the first recess (221), the first recess (221) and the second recess (225) together forming the constriction (203); 4. An electrical contact according to any one of claims 1 to 3.

5. the first recess (221) and / or the second recess (225) have a depth (239) between 100% and 300%, preferably between 150% and 250%, of the first length (211) of the rectangular cross section of the first portion (201); 5. The electrical contact of claim 4.

6. the edges (231, 233, 235) of the first recess (221) and / or the second recess (225) are rounded, in particular rounded along an oval or elliptical or circular arc; 6. An electrical contact according to claim 4 or 5.

7. said first recess (221) and / or said second recess (225) have a depth of between 10% and 40%, preferably between 20% and 30%, of said rectangular cross-section of said first portion (201), preferably of a second length (213) perpendicular to said first length (211); 7. An electrical contact according to any one of claims 4 to 6.

8. 8. An electrical contact pin for an electrical contact (103a, 103b) according to any one of claims 1 to 7, said pin (107a, 107b) comprising: a first portion (201) configured to establish electrical contact with a mating electrical terminal, said first portion (201) being disposed at a first end (207) of said pin (107a, 107b) and having a rectangular cross section in a plane perpendicular to an extension direction (200) of said pin (107a, 107b); a second portion (205) configured to connect the pins (107a, 107b) to a conductor, the second portion (205) being disposed at a second end (209) of the pins (107a, 107b) opposite the first end (207); a constriction (203) between said first portion (201) and said second portion (205) adapted to receive an O-ring (109a, 109b); Equipped with Electrical contact pin.

9. A connector housing for a male electrical connector (100), comprising: The housing (101) has a first surface (111) defining a cavity (301) configured to receive an electrical contact (103a, 103b) according to any one of claims 1 to 7 and with an opening (303) leading to the cavity (301); The opening (303) has a rectangular cross-section configured to receive the pin (107a, 107b); the connector housing (101) includes protrusions (113a, 113b) extending along the periphery (117a, 117) of the opening (303) so as to form a sealing seat (309) and having a shape adapted to accommodate an O-ring (109a, 109b) housed in the constriction (203) of the pin (107a, 107b); Connector housing.

10. A male electrical connector comprising a housing (101) according to claim 9 and electrical contacts (103a, 103b) according to any one of claims 1 to 7, the pins (107a, 107b) are received in the cavity (301) such that the second portion (205) is disposed inside the housing (101) and the first portion (201) is disposed outside the housing (101); the O-ring (109a, 109b) is received in the sealing seat (309) of the housing (101) so as to conform to the shape of the protrusion extending along the periphery (117a, 117b) of the opening (303); Male electrical connector.

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