EP2362496A1 - Connection element production method for bayonet connector and connection device - Google Patents
Connection element production method for bayonet connector and connection device Download PDFInfo
- Publication number
- EP2362496A1 EP2362496A1 EP11154593A EP11154593A EP2362496A1 EP 2362496 A1 EP2362496 A1 EP 2362496A1 EP 11154593 A EP11154593 A EP 11154593A EP 11154593 A EP11154593 A EP 11154593A EP 2362496 A1 EP2362496 A1 EP 2362496A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- wall
- lug
- connection
- connection element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000000295 complement effect Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 description 9
- 238000000151 deposition Methods 0.000 description 6
- 230000008021 deposition Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 4
- 238000009713 electroplating Methods 0.000 description 4
- 239000002964 rayon Substances 0.000 description 4
- 208000031968 Cadaver Diseases 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
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- 230000009897 systematic effect Effects 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/625—Casing or ring with bayonet engagement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/18—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing bases or cases for contact members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
- Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
Definitions
- the invention relates to a method for producing a connection element, such as a base, for a bayonet connector. More specifically, the invention relates to the assembly of lugs participating in the bayonet system of the connector on the main body of the corresponding connection element.
- the plug is provided with a locking ring fixed in translation and adapted to be locked on the outer wall of the complementary base when the connection between the contacts of the plug and the contacts of the base is made.
- the main body of the base is itself provided with lugs projecting radially outwardly from the outer wall of the base. These lugs are intended to cooperate with grooves dug in the inner wall of the locking ring. At the end of locking of the ring around the base, the lugs open into holes formed at the ends of the grooves, in order to make the locking of the plug and the irreversible base, or at the very least to make the unlocking unintentional impossible.
- bayonet locking device is of great interest from the point of view of the speed of locking. It is therefore widely used in many fields, such as that of civil or military aeronautics, or any other application in a severe environment.
- the lugs on the body of the base are known.
- the lugs can be cut in the mass. They are then made of the same material as the body of the base and have the mechanical characteristics of this material.
- the lugs being wear parts, when the body is light alloy, the wear resistance is then less than when the body is stainless steel. Otherwise, the lugs can be reported mechanically and, in this case, they can be in a different material, including stainless steel, to meet the wear requirements.
- the body of the base must, however, be treated to resist corrosion. Such treatment consists of more often in a protective layer, applied by chemical or electrolytic deposition or electroplating. This protective layer allows such a connector to withstand various environmental hazards and, in particular, to withstand humid environments by eliminating the risk of corrosion or rust.
- connection element for bayonet connector such as a base
- Another object of the invention is to provide a connection element for bayonet connector, provided with lugs, and which is able to withstand mechanical stresses especially at the area of connection with the lugs, whatever the nature coating that can cover said connecting element.
- the invention proposes to flatten, for example by countersinking, the surface bordering the open end of the orifices provided on the wall of the connecting element and intended to receive the lugs. More specifically, according to the invention, the burrs on the external surface of the connection element, consecutive to the piercing and bordering the corresponding orifice, are removed, or at least driven outwards, so that the surface external of the connection element has a flat surface, without asperities or bosses, at least facing the head of the pin that will come into contact with it. Indeed, when piercing the wall of the body of the connecting element, there is a material reflux forming a ring of material around the open end of the orifice obtained.
- the head of the lug then comes into contact with a flat and smooth surface, which makes it possible to limit the mechanical stresses between the lug head and the external surface of the connection element.
- the wall of the connecting element bordering the orifice may be planed to form a convex rounding and to eliminate any sharp edge between the surface plane bordering the orifice and the orifice proper. The presence of this rounding at the orifice makes it easier to introduce the lug and to avoid having a sharp circular imperfection between the orifice and the bottom of the countersink.
- a sharp angle intersection may have fine machining burrs that weaken the protection covering the part.
- the thickness of the deposited layer is difficult to control in this intersection because of the peak effect.
- the fact of making a rounding, or at least chamfering this intersection eliminates the risk of over-thickness and thus burrs during the anti-corrosion deposit. This smooths the contact area between the shoulder of the lug, at the junction between the head of the lug and the body of said lug, and the wall of the connecting element.
- the body of the connection element can be made by molding or machining. It has a cylindrical through hole extending along the longitudinal axis of said body, and opening at both ends of said body. This orifice is intended to receive an insulator also cylindrical in which extend along the longitudinal axis of the contacts of the connection element.
- flat surface is meant a surface that does not have defects or irregularities in surfaces, such as bosses, asperities, etc.
- the outer surface of the connecting element is hollowed, so that the flat surface ring is set back from the rest of the outer surface of the connection element,
- the operations a) to c) are repeated for each of the lugs to be mounted on the wall of the connection element.
- steps a) and b) simultaneously, by means of any known tool, notably allowing the simultaneous drilling and counterboring of the wall.
- the lug is inserted into force in the corresponding bore, whose diameter is at best equal to the diameter of the pin, so as to meet the mechanical requirements and functional constraints to allow the lugs to perform their functions.
- convex connection radius means a junction area between two surfaces, not having a sharp edge.
- the convex connection radius may consist of a round, but also a chamfered surface.
- the convex connection radius is produced on the wall of the body of the connection element so that it is strictly greater than a concave connection radius at the junction between the head and the body of the lug to be inserted into the corresponding hole.
- the flat surface formed around the bore has a diameter at least equal to the diameter of the head of the lug to pass through said bore.
- the method according to the invention advantageously makes it possible to apply an anti-corrosion protection on the external surface of the wall of the connection element after having made the bore, and before having inserted the pin into said bore, while guaranteeing the integrity of the anticorrosive surface.
- connection element for a bayonet connector comprising a hollow cylindrical main body, intended to receive electrical or optical contacts, a connection portion of the main body, intended to be connected to a complementary connection element, comprising at least one at least one through bore for receiving a lug projecting radially outwardly from the outer surface of the wall of the main body, characterized in that it has a flattened surface ring hollowed from the outer surface of the wall, said flattened surface ring surrounding at least one through bore for receiving a lug.
- FIG. 1 On the figure 1 is represented a bayonet connector base 1 provided with three pins 4 (only two visible on the figure 1 ).
- the base 1 is provided with a main body 2, a connection end 3 carries the lugs or protuberances 4 of the bayonet system.
- the lugs 4 extend on an outer perimeter of the main body 2.
- the lugs protrude outwardly from the outer surface 10 of the wall 5 of said main body 2, in order to cooperate with a locking ring provided with complementary orifices (not shown).
- the main body 2 of the base 1 is provided with an insert 6 extending longitudinally in the hollow body of the main body 2, said insert 6 being provided with four longitudinal housings 7 in which contacts are intended to extend.
- FIG. figure 2 there can be seen an enlargement of a protuberance 4 of a base as described in FIG. figure 1 which has been put in place according to the method of the invention.
- the figure 3 represents the same enlargement in cross section.
- the lug 4 protrudes from the outer surface 10 of the wall 5 of the main body 2 of the base 1. More specifically, the lug 4 passes through the wall 5, so that the body 13 of said lug is less partially accommodated in a through-orifice 12 formed in said wall 5, and in such a way that the head 8 of said lug 4 projects from the outer surface 10 of said wall 5.
- a flattened surface ring 11, or flat surface ring, is hollowed from the outer surface 10 of the wall 5 and surrounds the head 8 of the lug 4.
- the diameter D of the flattened surface ring 11 is strictly greater than the diameter d of the head 8 of the lug 4.
- the flattened surface ring 11 has a perfectly smooth surface, without roughness, roughness or other surface defects.
- the flattened surface ring 11 being hollowed from the outer surface 10 of the wall 5, a part of the head 8 of the lug 4 is set back relative to the outer surface 10 of said wall 5.
- the height h of the housing formed by the flattened surface ring 11 is small relative to the height H of the lug head 8, so that it can cooperate with the grooves of the locking ring to be mounted around the base 1.
- the height refers to the dimension extending radially from the wall of the base.
- the flattened surface ring 11 can be obtained, in particular by counterboring or machining, simultaneously or subsequently with the drilling of the through orifice 12 formed in the wall 5 of the main body 2 of the base 1 and intended to receive the body 13 of the the lug 4.
- the through bore 12 is formed radially in the wall 5 of the main body 2 of the base 1, and thus opens by a first end 15 at the outer surface 10 of said wall 5, and by a second end 18, opposite at the first, at an inner surface 17 of said wall 5.
- the inner surface 17 borders the cylindrical orifice 9 of the base 1.
- the diameter d of the head 8 of the lug 4 is strictly greater than the diameter of the through bore 12, so that the head 8 of the lug 4 rests on the flattened surface ring 11.
- the shoulder 14 corresponding to the connection between the head 8 and the cylindrical body 13 of the lug 4 rests against the flattened surface ring 11.
- the surface on which the shoulder 14 rests is perfectly flat, thus reducing the mechanical stresses.
- a convex connection radius R2 is provided at the intersection between the flat surface of the ring 11, and the first end 15 of the bore 12. This avoids having a sharp intersection between the edge of the bore 12 and the angle of the shoulder 14
- This convex connection radius R2 facilitates the introduction of the cylindrical body 13 of the lug 4 which, often, must be mounted in force in the bore 12.
- the presence of this convex connecting radius R2 also reduces the risks embrittlement of an optionally deposited coating on the outer surface 10 of the wall 5.
- the shoulder 14 of the lug 4 has a concave connection radius R1 at the junction between the lower flat surface 19 of the head 8, intended to rest against the flattened surface ring 11 , and the cylindrical portion 13 of said lug 4, which reduces the mechanical stresses at the level of the contact zone between the head 8 of the lug 4 and the external surface 10 of the wall 5 of the base. 1.
- the convex connection radius R2 of the bore 12 is strictly greater than the concave connection radius R1 of the lug 4.
- connection radius R2 equal to 0.05 cm, plus or minus 0.005 cm, is preferably chosen for a lug of dimensions between 0.15 and 0.30 cm, provided always that the convex connection radius R2 is strictly greater than concave connection radius R1.
- convex connection radius R2 of very low value, makes it possible to retain the largest possible bearing surface at the flattened surface ring 11, for the head 8 of the lug 7.
- the outer surface 10 of the wall 5 is covered with a protective coating against corrosion, or the like.
- the deposition of this coating can be achieved by any known means and in particular by chemical deposition, electrolytic or electroplating. According to the invention, this deposit is advantageously made once the through bores 12 made on the outer wall 5 of the base 1, and before the introduction of the lugs 4 in the corresponding bores 12.
- the rear end 16 of the body 13 of the lug 4 protrudes from the inner surface 17 of the wall 5. It is thus possible to crimp the rear end 16 on the inner surface 17 of the wall 5, so as to guarantee the holding in position of the lug 4 even in case of very strong stresses.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insertion Pins And Rivets (AREA)
- Connection Of Plates (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
L'invention concerne un procédé de réalisation d'un élément de connexion, tel qu'une embase, pour un connecteur à baïonnette. Plus précisément, l'invention concerne le montage d'ergots participant au système à baïonnette du connecteur sur le corps principal de l'élément de connexion correspondant.The invention relates to a method for producing a connection element, such as a base, for a bayonet connector. More specifically, the invention relates to the assembly of lugs participating in the bayonet system of the connector on the main body of the corresponding connection element.
Il est connu de verrouiller la connexion entre une fiche et une embase de connecteur électrique, par exemple, au moyen d'un système à baïonnette. Plus précisément, la fiche est munie d'une bague de verrouillage fixe en translation et apte à être verrouillée sur la paroi externe de l'embase complémentaire lorsque la connexion entre les contacts de la fiche et les contacts de l'embase est réalisée. Le corps principal de l'embase est, lui, muni d'ergots s'étendant en saillie radiale vers l'extérieur depuis la paroi externe de l'embase. Ces ergots sont destinés à coopérer avec des rainures creusées dans la paroi interne de la bague de verrouillage, En fin de verrouillage de la bague autour de l'embase, les ergots débouchent dans des orifices ménagés en extrémités des rainures, afin de rendre le verrouillage de la fiche et l'embase irréversible, ou tout le moins de rendre le déverrouillage involontaire impossible.It is known to lock the connection between a plug and an electrical connector base, for example, by means of a bayonet system. More specifically, the plug is provided with a locking ring fixed in translation and adapted to be locked on the outer wall of the complementary base when the connection between the contacts of the plug and the contacts of the base is made. The main body of the base is itself provided with lugs projecting radially outwardly from the outer wall of the base. These lugs are intended to cooperate with grooves dug in the inner wall of the locking ring. At the end of locking of the ring around the base, the lugs open into holes formed at the ends of the grooves, in order to make the locking of the plug and the irreversible base, or at the very least to make the unlocking unintentional impossible.
Un tel dispositif de verrouillage à baïonnette présente un grand intérêt du point de vu de la rapidité du verrouillage. Il est donc très utilisé dans de nombreux domaines, tels que celui de l'aéronautique civile ou militaire, ou toute autre application en milieu sévère.Such a bayonet locking device is of great interest from the point of view of the speed of locking. It is therefore widely used in many fields, such as that of civil or military aeronautics, or any other application in a severe environment.
On connaît de nombreuses formes de réalisation des ergots sur le corps de l'embase. Par exemple, les ergots peuvent être taillés dans la masse. Ils sont alors réalisés dans la même matière que le corps de l'embase et ont les caractéristiques mécaniques de cette matière. Les ergots étant des pièces d'usure, lorsque le corps est en alliage léger, la tenue à l'usure est alors moindre que lorsque le corps est en inox. Autrement, les ergots peuvent être rapportés mécaniquement et, dans ce cas, ils peuvent être dans un matériau tout autre, et notamment en inox, afin de répondre aux exigences d'usure. Ainsi, il est connu de rapporter des ergots en inox sur un corps d'embase en alliage d'aluminium. Le corps de l'embase doit cependant être traité de manière à résister à la corrosion. Un tel traitement consiste le plus souvent en une couche de protection, appliquée par dépôt chimique ou électrolytique ou galvanoplastie. Cette couche de protection permet à un tel connecteur de supporter différentes agressions de l'environnement et, notamment, de supporter des environnements humides en supprimant les risques de corrosion ou de rouille.Numerous embodiments of the lugs on the body of the base are known. For example, the lugs can be cut in the mass. They are then made of the same material as the body of the base and have the mechanical characteristics of this material. The lugs being wear parts, when the body is light alloy, the wear resistance is then less than when the body is stainless steel. Otherwise, the lugs can be reported mechanically and, in this case, they can be in a different material, including stainless steel, to meet the wear requirements. Thus, it is known to report stainless steel pins on an aluminum alloy base body. The body of the base must, however, be treated to resist corrosion. Such treatment consists of more often in a protective layer, applied by chemical or electrolytic deposition or electroplating. This protective layer allows such a connector to withstand various environmental hazards and, in particular, to withstand humid environments by eliminating the risk of corrosion or rust.
Des normes en connectique exigent un repère visuel, de couleur, au sommet des ergots. L'utilisateur doit pouvoir voir les ergots à travers les trous de la bague de verrouillage lorsque le verrouillage est obtenu. Le plus souvent les ergots sont rapportés sur le corps de l'embase une fois le dépôt de la couche de protection anticorrosion réalisé, afin que le corps de l'embase présente une couleur uniforme, correspondant à celle de la couche anticorrosion, différente de celles des ergots rapportés ultérieurement. Autrement, il est aussi possible de procéder au dépôt anticorrosion après la mise en place des ergots sur le corps de l'embase. Dans ce cas, il faut par la suite peindre les sommets des ergots d'une couleur différente. Cette seconde solution s'avère minutieuse et couteuse.Standards in connectivity require a visual cue, color at the top of the pins. The user must be able to see the lugs through the holes in the locking ring when locking is achieved. Most often the lugs are reported on the body of the base once the deposition of the anticorrosion protection layer made, so that the body of the base has a uniform color, corresponding to that of the anticorrosive layer, different from those studs reported later. Otherwise, it is also possible to proceed with the anti-corrosion deposit after the establishment of the lugs on the body of the base. In this case, it is necessary later to paint the tops of the lugs of a different color. This second solution is meticulous and expensive.
C'est pourquoi, le plus souvent, on préfère procéder dans un premier temps au dépôt de la couche de protection, puis ensuite à la mise en place des ergots.This is why, in most cases, it is preferable to first proceed with the deposition of the protective layer and then with the placement of the lugs.
Les normes environnementales de plus en plus strictes interdisent désormais l'utilisation de certains composés, considérés comme nuisibles pour l'environnement. Ainsi, le Cadmium et les Chromes VI se sont vus interdits pour la réalisation de telles couches de protection du fait de leur forte toxicité pour l'environnement. Il a donc été nécessaire de trouver des substituants pour la réalisation de ce dépôt anticorrosion. Cependant, les compositions actuellement utilisées pour la réalisation de la couche de protection ne présentent pas la même ductilité que celles riches en Cadmium et sont donc beaucoup plus cassantes que celles-ci. Dans les dispositifs actuels, il est donc courant que les contraintes mécaniques entre certains points de contact des ergots sur l'embase recouverte de la couche anticorrosion entraînent des cassures de cette couche de protection. De plus, la mise en place même des ergots sur l'embase, qui nécessite une insertion en force dudit ergot dans l'orifice correspondant ménagé sur l'embase, peut causer des fissures dans la couche de protection. Ces fissures et cassures sont donc concentrées dans la zone de contact entre l'ergot et le l'orifice sur l'embase, laissant apparaître la matière première utilisée pour réaliser le corps d'embase. La fonction anticorrosion de la couche de protection n'est donc pas maintenue dans ces zones. Le dispositif dans son ensemble s'en trouve fragilisé.Increasingly stringent environmental standards now prohibit the use of certain compounds that are considered harmful to the environment. Thus, Cadmium and Chromes VI have been banned for the realization of such protective layers because of their high toxicity to the environment. It has therefore been necessary to find substituents for the realization of this anticorrosion deposit. However, the compositions currently used for producing the protective layer do not have the same ductility as those rich in cadmium and are therefore much more brittle than these. In current devices, it is therefore common for the mechanical stresses between certain points of contact of the lugs on the base covered with the anticorrosive layer to cause breaks in this protective layer. In addition, the establishment of even the lugs on the base, which requires a force insertion of said lug into the corresponding hole formed on the base, can cause cracks in the protective layer. These cracks and breaks are therefore concentrated in the contact zone between the lug and the orifice on the base, revealing the raw material used to make the base body. The anticorrosion function of the protective layer is therefore not maintained in these areas. The device as a whole is weakened.
Aussi, dans l'invention, on cherche à fournir un procédé de réalisation d'un élément de connexion pour connecteur à baïonnette, tel qu'une embase, qui ne présente pas tout ou partie des inconvénients cités ci-dessus. Un autre but de l'invention est de réaliser un élément de connexion pour connecteur à baïonnette, muni d'ergots, et qui soit apte à résister aux contraintes mécaniques notamment au niveau de la zone de liaison avec les ergots, quelle que soit la nature du revêtement pouvant recouvrir ledit élément de connexion.Also, in the invention, it is sought to provide a method of producing a connection element for bayonet connector, such as a base, which does not have all or part of the disadvantages mentioned above. Another object of the invention is to provide a connection element for bayonet connector, provided with lugs, and which is able to withstand mechanical stresses especially at the area of connection with the lugs, whatever the nature coating that can cover said connecting element.
Pour cela, l'invention propose d'aplanir, par exemple par lamage, la surface bordant l'extrémité débouchante des orifices ménagés sur la paroi de l'élément de connexion et destinés à recevoir les ergots. Plus précisément, selon l'invention, les bavures sur la surface externe de l'élément de connexion, consécutives au perçage et bordant l'orifice correspondant, sont supprimées, ou au moins chassées vers l'extérieur, de manière à ce que la surface externe de l'élément de connexion présente une surface plane, sans aspérités ni bossages, au moins en regard de la tête de l'ergot qui va venir en contact contre elle. En effet, lorsque l'on perce la paroi du corps de l'élément de connexion, il y a un reflux de matière formant un anneau de matière autour de l'extrémité débouchante de l'orifice obtenu. Or, c'est justement au niveau de cette bavure, concentrée donc sur le pourtour externe de l'orifice, que la tête de l'ergot logé dans l'orifice vient appuyer. Comme la surface de la tête de l'ergot est très faible, la pression exercée par la tête sur l'élément de connexion se concentre au niveau de cette surface irrégulière. Les contraintes mécaniques étant donc très élevées dans cette zone de contact de faibles dimensions, lorsque la surface sur laquelle ces contraintes s'exercent est peu ductile, notamment dans le cas où l'élément de connexion est recouvert d'une couche anticorrosion, des cassures et fissures peuvent apparaître. L'invention propose donc de supprimer, ou repousser au-delà de la zone de contact entre l'élément de connexion et la tête d'ergot, ce reflux de matière première. On ménage ainsi une surface parfaitement plane et lisse autour de l'extrémité débouchante de l'orifice. La tête de l'ergot vient alors en contact d'une surface plane et lisse, ce qui permet de limiter les contraintes mécaniques entre la tête d'ergot et la surface externe de l'élément de connexion. Par ailleurs, selon l'invention, afin de diminuer encore les potentielles contraintes mécaniques au niveau de la zone de contact entre la tête de l'ergot et la surface externe de l'élément de connexion, on peut raboter la paroi de l'élément de connexion bordant l'orifice, pour former un arrondi convexe et supprimer toute arête vive entre la surface plane bordant l'orifice et l'orifice proprement dit. La présence de cet arrondi au niveau de l'orifice permet de faciliter l'introduction de l'ergot et d'éviter d'avoir une imperfection circulaire à angle vif entre l'orifice et le fond du lamage. En effet, une intersection à angle vif peut présenter de fines bavures d'usinage qui fragilisent la protection recouvrant la pièce. De plus, même sans bavure, lors de l'opération de dépôt de la couche de protection, par exemple par galvanoplastie, l'épaisseur de la couche déposée est difficile à maîtriser dans cette intersection du fait de l'effet de pointe. Le fait de réaliser un arrondi, ou au moins de chanfreiner cette intersection, permet d'éliminer les risques de sur-épaisseur et donc de bavures lors du dépôt anticorrosion. On lisse ainsi la zone de contact entre l'épaulement de l'ergot, au niveau de la jonction entre la tête de l'ergot et le corps dudit ergot, et la paroi de l'élément de connexion.For this, the invention proposes to flatten, for example by countersinking, the surface bordering the open end of the orifices provided on the wall of the connecting element and intended to receive the lugs. More specifically, according to the invention, the burrs on the external surface of the connection element, consecutive to the piercing and bordering the corresponding orifice, are removed, or at least driven outwards, so that the surface external of the connection element has a flat surface, without asperities or bosses, at least facing the head of the pin that will come into contact with it. Indeed, when piercing the wall of the body of the connecting element, there is a material reflux forming a ring of material around the open end of the orifice obtained. Now, it is precisely at the level of this burr, concentrated therefore on the outer periphery of the orifice, that the head of the lug housed in the orifice comes to support. As the surface of the pin head is very small, the pressure exerted by the head on the connecting element is concentrated at this irregular surface. The mechanical stresses are therefore very high in this small contact area, when the surface on which these stresses are exerted is not ductile, especially in the case where the connection element is covered with an anticorrosion layer, breaks and cracks may appear. The invention therefore proposes to eliminate, or push back beyond the contact area between the connection element and the lug head, this reflux of raw material. This provides a perfectly flat and smooth surface around the open end of the orifice. The head of the lug then comes into contact with a flat and smooth surface, which makes it possible to limit the mechanical stresses between the lug head and the external surface of the connection element. Moreover, according to the invention, in order to further reduce the potential mechanical stresses at the level of the zone of contact between the head of the lug and the external surface of the connecting element, the wall of the connecting element bordering the orifice may be planed to form a convex rounding and to eliminate any sharp edge between the surface plane bordering the orifice and the orifice proper. The presence of this rounding at the orifice makes it easier to introduce the lug and to avoid having a sharp circular imperfection between the orifice and the bottom of the countersink. Indeed, a sharp angle intersection may have fine machining burrs that weaken the protection covering the part. In addition, even without burr, during the deposition operation of the protective layer, for example by electroplating, the thickness of the deposited layer is difficult to control in this intersection because of the peak effect. The fact of making a rounding, or at least chamfering this intersection, eliminates the risk of over-thickness and thus burrs during the anti-corrosion deposit. This smooths the contact area between the shoulder of the lug, at the junction between the head of the lug and the body of said lug, and the wall of the connecting element.
L'invention a donc pour objet un procédé de réalisation d'un élément de connexion, tel qu'une embase, à baïonnette pour connecteur, notamment électrique ou optique, selon lequel on réalise un corps d'élément de connexion, de forme générale cylindrique creuse, caractérisé en ce qu'il comporte les étapes supplémentaires suivantes :
- a) on réalise un alésage traversant par perçage de la paroi du corps de l'élément de connexion, depuis la surface externe de ladite paroi ;
- b) on usine la surface externe de la paroi autour de l'alésage de manière à creuser une surface plane autour dudit alésage ;
- c) on insère un ergot dans l'alésage, depuis la surface externe de la paroi, de manière à ce qu'une tête de l'ergot soit en saillie de la surface externe de ladite paroi.
- a) a through bore is made by drilling the wall of the body of the connecting element from the outer surface of said wall;
- b) the outer surface of the wall is machined around the bore so as to dig a planar surface around said bore;
- c) inserting a lug in the bore, from the outer surface of the wall, so that a head of the lug protrudes from the outer surface of said wall.
Le corps de l'élément de connexion peut être réalisé par moulage ou usinage. Il présente un orifice traversant cylindrique s'étendant selon l'axe longitudinal dudit corps, et débouchant au niveau des deux extrémités dudit corps. Cet orifice est destiné à recevoir un isolant également cylindrique dans lequel s'étendront selon l'axe longitudinal les contacts de l'élément de connexion.The body of the connection element can be made by molding or machining. It has a cylindrical through hole extending along the longitudinal axis of said body, and opening at both ends of said body. This orifice is intended to receive an insulator also cylindrical in which extend along the longitudinal axis of the contacts of the connection element.
Par surface plane, on entend une surface ne présentant pas de défauts ou irrégularités de surfaces, tels que des bossages, aspérités etc.By flat surface is meant a surface that does not have defects or irregularities in surfaces, such as bosses, asperities, etc.
La surface externe de l'élément de connexion est creusée, de sorte que l'anneau de surface plane est en retrait par rapport au reste de la surface externe de l'élément de connexion,The outer surface of the connecting element is hollowed, so that the flat surface ring is set back from the rest of the outer surface of the connection element,
Avantageusement, on répète les opérations a) à c) pour chacun des ergots devant être montés sur la paroi de l'élément de connexion.Advantageously, the operations a) to c) are repeated for each of the lugs to be mounted on the wall of the connection element.
Selon le procédé de réalisation de l'invention, il est possible de réaliser les étapes a) et b) simultanément, au moyen de tout outil connu, permettant notamment le perçage et le lamage simultanés de la paroi.According to the embodiment method of the invention, it is possible to perform steps a) and b) simultaneously, by means of any known tool, notably allowing the simultaneous drilling and counterboring of the wall.
Généralement, l'ergot est inséré en force dans l'alésage correspondant, dont le diamètre est au mieux égal au diamètre de l'ergot, de manière à répondre aux exigences mécaniques et aux contraintes fonctionnelles pour permettre aux ergots de remplir leurs fonctions.Generally, the lug is inserted into force in the corresponding bore, whose diameter is at best equal to the diameter of the pin, so as to meet the mechanical requirements and functional constraints to allow the lugs to perform their functions.
Dans un exemple de réalisation particulier de l'invention, on peut prévoir de disposer deux, trois ou plus ergots sur la paroi externe de l'élément de connexion. Dans ce cas, les étapes a à c sont répétées autant de fois qu'il y a d'ergots à apporter sur la paroi de l'élément de connexion. Selon un exemple de mise en oeuvre du procédé selon l'invention, il est possible de réaliser l'étape supplémentaire suivante :
- on ménage un rayon de raccordement convexe au niveau de la jonction entre la surface plane autour de l'alésage et ledit alésage, sur toute une circonférence dudit alésage avant d'insérer l'ergot dans l'alésage.
- providing a convex connection radius at the junction between the planar surface around the bore and said bore, over a circumference of said bore before inserting the pin into the bore.
Par rayon de raccordement convexe, on entend une zone de jonction entre deux surfaces, ne présentant pas d'arête vive. Ainsi, le rayon de raccordement convexe peut consister en un arrondi, mais également en une surface chanfreinée.By convex connection radius means a junction area between two surfaces, not having a sharp edge. Thus, the convex connection radius may consist of a round, but also a chamfered surface.
Dans ce cas, avantageusement, on réalise le rayon de raccordement convexe sur la paroi du corps de l'élément de connexion de manière à ce qu'il soit strictement supérieur à un rayon de raccordement concave au niveau de la jonction entre la tête et le corps de l'ergot devant être inséré dans l'orifice correspondant.In this case, advantageously, the convex connection radius is produced on the wall of the body of the connection element so that it is strictly greater than a concave connection radius at the junction between the head and the body of the lug to be inserted into the corresponding hole.
Préférentiellement, la surface plane ménagée autour de l'alésage a un diamètre au moins égal au diamètre de la tête de l'ergot devant traverser ledit alésage.Preferably, the flat surface formed around the bore has a diameter at least equal to the diameter of the head of the lug to pass through said bore.
Afin de garantir le maintien en position de l'ergot sur la paroi de l'élément de connexion, il est possible de réaliser l'étape supplémentaire suivante :
- e) on sertit l'extrémité arrière de l'ergot, monté dans l'alésage correspondant, sur la surface interne de la paroi de l'élément de connexion.
- e) the rear end of the lug, mounted in the corresponding bore, is crimped onto the inner surface of the wall of the connecting element.
Le procédé selon l'invention permet avantageusement d'appliquer une protection anticorrosion sur la surface externe de la paroi de l'élément de connexion après avoir réalisé l'alésage, et avant d'avoir inséré l'ergot dans ledit alésage, tout en garantissant l'intégrité de la surface anticorrosion.The method according to the invention advantageously makes it possible to apply an anti-corrosion protection on the external surface of the wall of the connection element after having made the bore, and before having inserted the pin into said bore, while guaranteeing the integrity of the anticorrosive surface.
Bien entendu, il est également possible de procéder au dépôt de la couche anticorrosion une fois seulement que les ergots sont fixés à la paroi de l'élément de connexion, dans ce cas, comme exposé plus haut, il est souvent nécessaire de procéder à une étape ultérieure supplémentaire de colorisation, ou autre, des têtes d'ergots,Of course, it is also possible to proceed with the deposition of the anticorrosion layer only once the lugs are attached to the wall of the connecting element, in this case, as explained above, it is often necessary to proceed to a subsequent further step of coloring, or other, pins heads,
L'invention concerne également un élément de connexion pour connecteur à baïonnette comportant un corps principal cylindrique creux, destiné à recevoir des contacts électriques ou optiques, une portion de connexion du corps principal, destinée à être connectée à un élément de connexion complémentaire, comportant au moins un alésage traversant destiné à recevoir un ergot en saillie radiale vers l'extérieur depuis la surface externe de la paroi du corps principal, caractérisé en ce qu'il présente, un anneau de surface aplanie creusé depuis la surface externe de la paroi, ledit anneau de surface aplanie entourant au moins un alésage traversant destiné à recevoir un ergot.The invention also relates to a connection element for a bayonet connector comprising a hollow cylindrical main body, intended to receive electrical or optical contacts, a connection portion of the main body, intended to be connected to a complementary connection element, comprising at least one at least one through bore for receiving a lug projecting radially outwardly from the outer surface of the wall of the main body, characterized in that it has a flattened surface ring hollowed from the outer surface of the wall, said flattened surface ring surrounding at least one through bore for receiving a lug.
Selon des exemples de réalisation de l'élément de connexion pour connecteur à baïonnette selon l'invention, il est possible de prévoir tout ou partie des caractéristiques supplémentaires suivantes :
- l'anneau de surface aplanie présente un diamètre au moins égal au diamètre de la tête de l'ergot que l'alésage correspondant est destiné à recevoir.
- une jonction entre l'anneau de surface aplanie et la partie cylindrique de l'alésage présente rayon de raccordement convexe.
- l'élément de connexion comporte au moins un ergot logé dans un alésage ménagé sur la paroi dudit élément de connexion, ledit ergot présentant, au niveau d'une jonction entre la tête et le corps un rayon de raccordement concave strictement inférieur au rayon de raccordement convexe de l'alésage dans lequel il est logé.
- the flattened surface ring has a diameter at least equal to the diameter of the head of the lug that the corresponding bore is intended to receive.
- a junction between the flattened surface ring and the cylindrical portion of the bore has convex connection radius.
- the connection element comprises at least one lug housed in a bore formed on the wall of said connection element, said lug having, at a junction between the head and the body, a concave connection radius strictly less than the connection radius convex of the bore in which it is housed.
L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles-ci sont présentées à titre indicatif et nullement limitatif de l'invention. Les figures représentent :
-
Figure 1 : une représentation schématique d'un corps d'embase pour connecteur à baïonnette, muni d'ergots ; -
Figure 2 : une représentation schématique d'une embase à baïonnette selon l'invention au niveau d'un alésage muni d'un ergot ; -
Figure 3 : une représentation en coupe transversale de l'embase à baïonnette de lafigure 2 .
-
Figure 1 : a schematic representation of a base body for bayonet connector, provided with lugs; -
Figure 2 : a schematic representation of a bayonet base according to the invention at a bore provided with a lug; -
Figure 3 : a cross-sectional representation of the Bayonet Base of thefigure 2 .
Sur la
L'embase 1 est munie d'un corps principal 2 dont une extrémité de connexion 3 porte les ergots, ou protubérances, 4 du système à baïonnette. Les ergots 4 s'étendent sur un périmètre externe du corps principal 2. Les ergots sont en saillie vers l'extérieur depuis la surface externe 10 de la paroi 5 dudit corps principal 2, afin de pouvoir coopérer avec une bague de verrouillage munie d'orifices complémentaires (non représentée). Le corps principal 2 de l'embase 1 est muni d'un insert 6 s'étendant longitudinalement dans le corps creux du corps principal 2, ledit insert 6 étant muni de quatre logements longitudinaux 7 dans lesquels des contacts sont destinés à s'étendre.The
Sur la
La
L'ergot 4 est en saillie de la surface externe 10 de la paroi 5 du corps principal 2 de l'embase 1. Plus précisément, l'ergot 4 traverse la paroi 5, de manière à ce que le corps 13 dudit ergot soit au moins partiellement logé dans un orifice 12 traversant ménagé dans ladite paroi 5, et de manière à ce que la tête 8 dudit ergot 4 soit en saillie de la surface externe 10 de ladite paroi 5.The
Un anneau de surface aplanie 11, ou anneau de surface plane, est creusé depuis la surface externe 10 de la paroi 5 et entoure la tête 8 de l'ergot 4. Le diamètre D de l'anneau de surface aplanie 11 est strictement supérieur au diamètre d de la tête 8 de l'ergot 4. L'anneau de surface aplanie 11 présente une surface parfaitement lisse, sans rugosités, aspérités ou autres défauts de surface.A flattened
L'anneau de surface aplanie 11 étant creusé depuis la surface externe 10 de la paroi 5, une partie de la tête 8 de l'ergot 4 est en retrait par rapport à la surface externe 10 de ladite paroi 5. Avantageusement, la hauteur h du logement formé par l'anneau de surface aplanie 11 est faible par rapport à la hauteur H de la tête d'ergot 8, de manière à ce qu'elle puisse coopérer avec les rainures de la bague de verrouillage devant être montée autour de l'embase 1. La hauteur s'entend de la dimension s'étendant radialement depuis la paroi de l'embase.The flattened
L'anneau de surface aplanie 11 peut être obtenu, notamment par lamage ou usinage, simultanément ou ultérieurement au perçage de l'orifice traversant 12 ménagé dans la paroi 5 du corps principal 2 de l'embase 1 et destiné à recevoir le corps 13 de l'ergot 4.The flattened
L'alésage traversant 12 est ménagé radialement dans la paroi 5 du corps principal 2 de l'embase 1, et débouche ainsi par une première extrémité 15 au niveau de la surface externe 10 de ladite paroi 5, et par une seconde extrémité 18, opposée à la première, au niveau d'une surface interne 17 de ladite paroi 5. la surface interne 17 borde l'orifice cylindrique 9 de l'embase 1.The through
Le diamètre d de la tête 8 de l'ergot 4 est strictement supérieur au diamètre d' de l'alésage traversant 12, de sorte que la tête 8 de l'ergot 4 repose sur l'anneau de surface aplanie 11.The diameter d of the
Plus précisément, l'épaulement 14 correspondant à la liaison entre la tête 8 et le corps cylindrique 13 de l'ergot 4 repose contre l'anneau de surface aplanie 11. Dans la mesure où toutes les impuretés et irrégularités de surface de la paroi externe 5 ont été chassée lors du lamage au-delà dudit anneau 11, la surface sur laquelle repose l'épaulement 14 est parfaitement plane, réduisant ainsi les contraintes mécaniques.More specifically, the
Par ailleurs, afin de faciliter l'insertion du corps cylindrique 13 de l'ergot 4 dans l'alésage 12 correspondant, on ménage un rayon de raccordement convexe R2 au niveau de l'intersection entre la surface plane de l'anneau 11, et la première extrémité 15 de l'alésage 12. On évite ainsi d'avoir une intersection à angle vif entre le bord de l'alésage 12 et l'angle de l'épaulement 14Moreover, in order to facilitate the insertion of the
Ce rayon de raccordement convexe R2 facilite l'introduction du corps cylindrique 13 de l'ergot 4 qui, bien souvent, doit être monté en force dans l'alésage 12. La présence de ce rayon de raccordement convexe R2 permet également de réduire les risques de fragilisation d'un éventuellement revêtement déposé sur la surface externe 10 de la paroi 5.This convex connection radius R2 facilitates the introduction of the
Par ailleurs, de manière assez systématique, l'épaulement 14 de l'ergot 4, présente un rayon de raccordement concave R1 à la jonction entre la surface plane inférieure 19 de la tête 8, destinée à reposer contre l'anneau de surface aplanie 11, et la partie cylindrique 13 dudit ergot 4, ce qui permet de diminuer d'autant les contraintes mécaniques au niveau de la zone de contact entre la tête 8 de l'ergot 4 et la surface externe 10 de la paroi 5 de l'embase 1.Moreover, in a fairly systematic manner, the
Avantageusement, le rayon de raccordement convexe R2 de l'alésage 12 est strictement supérieur au rayon de raccordement concave R1 de l'ergot 4.Advantageously, the convex connection radius R2 of the
Par ailleurs, on choisit préférentiellement un rayon de raccordement R2 égal à 0,05 cm, plus ou moins 0,005 cm, pour un ergot de dimensions comprises entre 0.15 et 0.30 cm, sous réserve toujours que le rayon de raccordement convexe R2 soit strictement supérieur au rayon de raccordement concave R1. Un tel rayon de raccordement convexe R2, de valeur très faible, permet de conserver la plus grande surface d'appui possible au niveau de l'anneau de surface aplanie 11, pour la tête 8 de l'ergot 7.Furthermore, a connection radius R2 equal to 0.05 cm, plus or minus 0.005 cm, is preferably chosen for a lug of dimensions between 0.15 and 0.30 cm, provided always that the convex connection radius R2 is strictly greater than concave connection radius R1. Such a convex connection radius R2, of very low value, makes it possible to retain the largest possible bearing surface at the flattened
La surface externe 10 de la paroi 5 est recouverte d'un revêtement protecteur contre la corrosion, ou autre. Le dépôt de ce revêtement peut être réalisé par tout moyen connu et notamment par dépôt chimique, électrolytique ou galvanoplastie. Selon l'invention, ce dépôt est avantageusement réalisé une fois les alésages traversant 12 réalisés sur la paroi externe 5 de l'embase 1, et avant l'introduction des ergots 4 dans les alésages 12 correspondants.The
L'extrémité arrière 16 du corps 13 de l'ergot 4 est en saillie depuis la surface interne 17 de la paroi 5. Il est ainsi possible de sertir l'extrémité arrière 16 sur la surface interne 17 de la paroi 5, de manière à garantir le maintien en position de l'ergot 4 même en cas de très fortes sollicitations.The
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1051359A FR2956781B1 (en) | 2010-02-25 | 2010-02-25 | METHOD FOR MAKING A CONNECTING ELEMENT FOR A CONNECTOR FOR A BAIONNETTE AND CONNECTING DEVICE |
Publications (2)
Publication Number | Publication Date |
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EP2362496A1 true EP2362496A1 (en) | 2011-08-31 |
EP2362496B1 EP2362496B1 (en) | 2013-12-25 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP11154593.5A Active EP2362496B1 (en) | 2010-02-25 | 2011-02-15 | Connection element production method for bayonet connector and connection device |
Country Status (3)
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US (1) | US8348690B2 (en) |
EP (1) | EP2362496B1 (en) |
FR (1) | FR2956781B1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102013018639A1 (en) * | 2013-11-06 | 2014-07-24 | Fresenius Medical Care Deutschland Gmbh | Connector for connecting bag and hose system for providing e.g. medical solution during extraporal blood treatment for patient, has cone only opening sealing element when projection of one part is inserted in retainer of other part |
JP1612015S (en) * | 2018-01-24 | 2018-08-27 | ||
USD989000S1 (en) * | 2020-07-21 | 2023-06-13 | Vertiv Corporation | Connector |
FR3122043B1 (en) | 2021-04-19 | 2023-03-24 | Souriau | Method for producing a bayonet connection element for a connector |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3470524A (en) * | 1967-06-19 | 1969-09-30 | Deutsch Co Elec Comp | Push-pull connector |
US5256077A (en) * | 1990-11-14 | 1993-10-26 | Matrix Science Corporation | Electrical connector shell reinforcement means and method for fabricating same |
US6808407B1 (en) * | 2003-08-22 | 2004-10-26 | Agilent Technologies, Inc. | Locking precision male BNC connector with latch mechanism allowing cable rotation |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0840404B1 (en) * | 1993-10-07 | 2000-12-27 | Andrew A.G. | Surge Protector |
-
2010
- 2010-02-25 FR FR1051359A patent/FR2956781B1/en not_active Expired - Fee Related
-
2011
- 2011-02-15 EP EP11154593.5A patent/EP2362496B1/en active Active
- 2011-02-25 US US13/035,165 patent/US8348690B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3470524A (en) * | 1967-06-19 | 1969-09-30 | Deutsch Co Elec Comp | Push-pull connector |
US5256077A (en) * | 1990-11-14 | 1993-10-26 | Matrix Science Corporation | Electrical connector shell reinforcement means and method for fabricating same |
US6808407B1 (en) * | 2003-08-22 | 2004-10-26 | Agilent Technologies, Inc. | Locking precision male BNC connector with latch mechanism allowing cable rotation |
Also Published As
Publication number | Publication date |
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FR2956781B1 (en) | 2012-09-14 |
FR2956781A1 (en) | 2011-08-26 |
US20110206333A1 (en) | 2011-08-25 |
US8348690B2 (en) | 2013-01-08 |
EP2362496B1 (en) | 2013-12-25 |
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