EP0220977B1 - Locking device for a pin contact of a measuring apparatus - Google Patents

Locking device for a pin contact of a measuring apparatus Download PDF

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Publication number
EP0220977B1
EP0220977B1 EP86402078A EP86402078A EP0220977B1 EP 0220977 B1 EP0220977 B1 EP 0220977B1 EP 86402078 A EP86402078 A EP 86402078A EP 86402078 A EP86402078 A EP 86402078A EP 0220977 B1 EP0220977 B1 EP 0220977B1
Authority
EP
European Patent Office
Prior art keywords
locking device
plug
housing
hinge
socket
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.)
Expired - Lifetime
Application number
EP86402078A
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German (de)
French (fr)
Other versions
EP0220977A3 (en
EP0220977A2 (en
Inventor
Istvan Szoboszlai
Christian Roucher
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ITT Composants et Instruments SA
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ITT Composants et Instruments SA
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Publication date
Application filed by ITT Composants et Instruments SA filed Critical ITT Composants et Instruments SA
Publication of EP0220977A2 publication Critical patent/EP0220977A2/en
Publication of EP0220977A3 publication Critical patent/EP0220977A3/en
Application granted granted Critical
Publication of EP0220977B1 publication Critical patent/EP0220977B1/en
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Classifications

    • 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
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • 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
    • H01R13/627—Snap or like fastening
    • H01R13/6271—Latching means integral with the housing

Definitions

  • the present invention relates to a locking device for retaining an electrical connection plug inserted in a measuring device.
  • locking devices In the field of electrical connection means, locking devices are generally known which consist of an elastic element integral with the device and cooperating by its shape with a part of the plug, to retain it. This element can be elastically deformed to release the plug.
  • Measuring devices generally have two leads terminated by plugs on the device side and probes on the measuring point side.
  • the plugs of these cords are plugged into two or more sockets provided in the device housing. These plugs are held in place by the friction between the plug and socket connection members.
  • connection members can be damaged, on the other hand, the connection can be released unexpectedly.
  • locking means for retaining the plugs of measuring devices is therefore desirable.
  • the locking device is not always necessary and one should avoid providing a special version of the device incorporating a locking device.
  • the tightness of the case must obviously be preserved. It is also necessary to keep the aesthetics of the device.
  • the locking device in itself, must be reliable and inexpensive.
  • the invention therefore provides a locking device meeting all these conditions in a particularly original way.
  • the invention provides a device for locking an electrical connection plug in a socket of a measuring device, characterized in that it comprises an elastically deformable element connected to the device by a joint and s' engaging by cooperation of shapes with a part of the plug in order to retain it in the socket, the release of the plug being obtained by elastic deformation of the element which comprises a tongue arranged transversely in front of the orifice of the socket and being provided with 'A recess, intended to be traversed by the plug, disposed eccentric with respect to the socket body and whose edge opposite to said articulation cooperates by its shape with said plug part when it is inserted.
  • the tongue acts as a link at least partially surrounding the plug and working in traction when the cord is pulled, the engagement of the edge of the tongue on the plug increasing with the tensile force, so the plug is retained reliably.
  • the joint is a bent part, one end of which supports the tongue at a certain distance from the surface of the housing of the device, the other end of this bent part extending towards this surface.
  • the deformations of the bent part will allow the tongue to move elastically, for unlocking and locking.
  • a push button associated with the joint.
  • a device having several sockets each will be provided with locking means by providing several tongues each associated by an articulation with a common locking adapter. This will include fixing means for removable mounting on the housing.
  • the entire locking device can finally take the form of a piece of molded plastic material adaptable to the housing of a device that can be used without this piece, of which it will constitute an inexpensive accessory.
  • the device of FIG. 1 is a conventional measuring device in which a housing 1, in two parts, 2 and 3, is recognized, between which there is a recess 4 marking the joint plane, the screen 5 of a display digital and range switch 6.
  • the locking device 7 conceals the orifices of four connection sockets for cords.
  • This device comprises two wings, 8 and 9, joined by a cross member 10 and constituting a locking adapter carrying the four tabs 11, 12, 13, 14 corresponding to the four sockets.
  • These four tabs are provided with recesses 15, 16, 17, 18 in which the plugs of the cords are inserted as required. The tabs are used to retain the cards as we will now see with reference to Figures 2 and 3.
  • FIG. 3 showing the end of the housing 1, in longitudinal section through the axis of the recess 18 of the tongue 14. We therefore find the upper (3) and lower (2) parts of the housing 1 , as well as the step 4 materializing the joint plane between these two parts.
  • a cylindrical body 19 containing a socket 20 In the upper part 3 of the housing is mounted a cylindrical body 19 containing a socket 20.
  • the socket 20 is made of conductive metal and is extended by a pin 21 passing through the bottom of the body 19 in a sealed manner.
  • FIG. 3 also illustrates a plug 30 essentially comprising a body 31 and a pin 32.
  • the plug body is made of insulating plastic, while the pin 32, of conductive metal, is connected, in a manner not shown, to the internal conductor of the cord. 34.
  • the external surface 33 of the pin 32 adapts to the internal surface 22 of the socket 20 for appropriate electrical contact.
  • this plug 30 has two circular grooves 35, 36 which, in the absence of the locking device 7, would remain outside the housing 1 to materialize the depth of insertion of the plug and offer a grip by facilitating the manual extraction.
  • the locking device 7 With the tongue 14 and the cross-member 10.
  • the latter bears against part 3 of the housing and includes a rib 37, which may be only partial, fitting in in the recess 4.
  • the locking device also comprises a rib 38, perpendicular to the rib 37, cooperating with a groove 39 in the part 3 of the housing 1, at the two ends of the device.
  • These means allow the removable mounting of the device 7 on the housing 1 by engagement and sliding of the ribs 38 in the grooves 39 until the rib 37 snaps into the recess 4, situation illustrated in Figure 1.
  • the shape in dovetail of the ribs 38 and of the grooves 39 is such that the device 7 can only be separated from the housing 1 by a vertical force from the bottom up which cannot happen accidentally.
  • the tongue 14 (fig. 3) is associated with the cross-member 10 by an articulation 40 comprising a bent part, one end 41 of which supports the tongue 14, in its extension and the other end 42 of which extends towards the surface 43 of the housing 1 and is extended beyond by the crosspiece 10.
  • this bent part are such that the tongue 14, at rest, in the position shown in particular in Figures 1 and 3, is parallel to the surface 43 of the housing in which the connection sockets are arranged, at a certain distance from this one.
  • This articulation 40 further carries a projection pushing 44. By pushing on the push 44 towards the end of the tongue 14, the plug 30 can be unlocked as will be seen later.
  • the recess 18 of the tongue 14 is eccentric relative to the sleeve body 19, as can be seen by comparing the two halves of Figure 2 and observing the sectional view of Figure 3.
  • the edge 45 of this recess opposite the articulation 40, therefore encroaches on the orifice of the sleeve body 19.
  • the recess 18 comprises a chamfer 46 on the side of the edge 45.
  • FIG. 2 at the same time as FIG. 1, it can be seen that the tongues, flat and parallel, are also aligned with the upper edge of the wings 7, 9, forming a thin block which covers the angle of the device housing without breaking the line. Between these tabs and wings, the slots such as 50 are wide enough to avoid jamming, but lateral teeth such as 51 make it possible to limit any lateral movement. These provisions satisfy both mechanical needs and aesthetic concerns.
  • the entire device 7, as shown, can be made in a single piece of molded plastic and of low cost.
  • the only modification made to the device is the addition grooves 39 in the mass of the housing, so that the tightness of this housing, in particular, is in no way affected.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Description

La présente invention a pour objet un dispositif de verrouillage pour retenir une fiche de connexion électrique enfichée dans un appareil de mesure.The present invention relates to a locking device for retaining an electrical connection plug inserted in a measuring device.

Dans le domaine des moyens de connexion électrique, on connaît des dispositifs de verrouillage généralement constitués par un élément élastique solidaire de l'appareil et coopérant par sa forme avec une partie de la fiche, pour la retenir. Cet élément peut être élastiquement déformé pour libérer la fiche.In the field of electrical connection means, locking devices are generally known which consist of an elastic element integral with the device and cooperating by its shape with a part of the plug, to retain it. This element can be elastically deformed to release the plug.

Les appareils de mesure comportent généralement deux cordons terminés par des fiches, côté appareil, et des sondes, côté points de mesure. Les fiches de ces cordons s'enfichent dans deux ou plusieurs douilles prévues dans le boîtier de l'appareil. Ces fiches tiennent en place par la friction entre les organes de connexion de la fiche et de la douille.Measuring devices generally have two leads terminated by plugs on the device side and probes on the measuring point side. The plugs of these cords are plugged into two or more sockets provided in the device housing. These plugs are held in place by the friction between the plug and socket connection members.

Il arrive toutefois que les fiches subissent des forces relativement importantes résultant d'un effort de traction sur le cordon et, d'une part, les organes de connexion peuvent en être endommagés, d'autre part, la connexion peut être libérée de façon inopinée.However, it happens that the plugs undergo relatively large forces resulting from a tensile force on the cord and, on the one hand, the connection members can be damaged, on the other hand, the connection can be released unexpectedly. .

L'adjonction de moyens de verrouillage pour retenir les fiches d'appareils de mesure est donc souhaitable. Elle se heurte cependant à de nombreuses conditions dont la première est que l'appareil ne subisse que des modifications minimes et aucun coût supplémentaire. En effet, le dispositif de verrouillage n'est pas toujours nécessaire et on doit éviter de prévoir une version spéciale de l'appareil incorporant un dispositif de verrouillage. L'étanchéité du boîtier doit évidemment être préservée. Il y a par ailleurs lieu de conserver l'esthétique de l'appareil. Bien entendu, enfin, le dispositif de verrouillage, en lui-même, doit être fiable et peu coûteux.The addition of locking means for retaining the plugs of measuring devices is therefore desirable. However, it faces many conditions, the first of which is that the device undergoes only minimal modifications and no additional cost. Indeed, the locking device is not always necessary and one should avoid providing a special version of the device incorporating a locking device. The tightness of the case must obviously be preserved. It is also necessary to keep the aesthetics of the device. Of course, finally, the locking device, in itself, must be reliable and inexpensive.

L'invention propose donc un dispositif de verrouillage répondant à toutes ces conditions de façon particulièrement originale.The invention therefore provides a locking device meeting all these conditions in a particularly original way.

En effet, l'invention propose un dispositif de verrouillage d'une fiche de connexion électrique dans une douille d'un appareil de mesure, caractérisé en ce qu'il comprend un élément déformable élastiquement relié à l'appareil par une articulation et s'engageant par coopération de formes avec une partie de la fiche afin de la retenir dans la douille, la libération de la fiche étant obtenue par déformation élastique de l'élément qui comporte une languette disposée transversalement devant l'orifice de la douille et étant pourvue d'un évidement, destiné à être traversé par la fiche, disposé excentré par rapport au corps de douille et dont le bord opposé à ladite articulation coopère par sa forme avec ladite partie de fiche lors de son insertion.Indeed, the invention provides a device for locking an electrical connection plug in a socket of a measuring device, characterized in that it comprises an elastically deformable element connected to the device by a joint and s' engaging by cooperation of shapes with a part of the plug in order to retain it in the socket, the release of the plug being obtained by elastic deformation of the element which comprises a tongue arranged transversely in front of the orifice of the socket and being provided with 'A recess, intended to be traversed by the plug, disposed eccentric with respect to the socket body and whose edge opposite to said articulation cooperates by its shape with said plug part when it is inserted.

Avec une telle solution, la languette agit comme un lien entourant au moins partiellement la fiche et travaillant en traction lorsque l'on tire sur le cordon, l'engagement du bord de la languette sur la fiche augmentant avec l'effort de traction, de sorte que la fiche est retenue de manière fiable.With such a solution, the tongue acts as a link at least partially surrounding the plug and working in traction when the cord is pulled, the engagement of the edge of the tongue on the plug increasing with the tensile force, so the plug is retained reliably.

Selon une caractéristique préférée de l'invention, l'articulation est une partie coudée dont une extrémité supporte la languette à une certaine distance de la surface du boîtier de l'appareil, l'autre extrémité de cette partie coudée s'étendant vers cette surface.According to a preferred characteristic of the invention, the joint is a bent part, one end of which supports the tongue at a certain distance from the surface of the housing of the device, the other end of this bent part extending towards this surface. .

Ainsi, les déformations de la partie coudée permettront de mouvoir élastiquement la languette, pour le déverrouillage et le verrouillage. Pour faciliter ces actions, on a prévu, de plus un poussoir associé à l'articulation.Thus, the deformations of the bent part will allow the tongue to move elastically, for unlocking and locking. To facilitate these actions, there is also provided a push button associated with the joint.

Un appareil ayant plusieurs douilles, chacune sera pourvue de moyens de verrouillage en prévoyant plusieurs languettes associées chacune par une articulation à un adaptateur de verrrouillage commun. Celui-ci comprendra des moyens de fixation pour un montage amovible sur le boîtier. L'ensemble du dispositif de verrouillage pourra enfin prendre la forme d'une pièce de matière plastique moulée adaptable sur le boîtier d'un appareil utilisable sans cette pièce, dont elle constituera un accessoire peu coûteux. 〈Un dispositif de verrouillage d'une fiche de connexion électrique dans une douille est décrit dans le document DE-A- 3105 808.〉A device having several sockets, each will be provided with locking means by providing several tongues each associated by an articulation with a common locking adapter. This will include fixing means for removable mounting on the housing. The entire locking device can finally take the form of a piece of molded plastic material adaptable to the housing of a device that can be used without this piece, of which it will constitute an inexpensive accessory. 〈A device for locking an electrical connection plug in a socket is described in document DE-A-3105 808.〉

Les différents objets et caractéristiques de l'invention seront maintenant détaillés dans la description qui va suivre, faite à titre d'exemple non limitatif, en se reportant aux figures annexées qui représentent :

  • la figure 1, une vue en perspective d'un appareil de mesure pourvu du dispositif de verrouillage de l'invention,
  • la figure 2, une vue partielle de cet appareil, avec et sans le dispositif de verrouillage de l'invention,
  • la figure 3, une vue en coupe partielle de l'extrêmité de l'appareil de mesure, avec une fiche enfichée et verrouillée.
The various objects and characteristics of the invention will now be detailed in the description which follows, given by way of nonlimiting example, with reference to the appended figures which represent:
  • FIG. 1, a perspective view of a measuring device provided with the locking device of the invention,
  • FIG. 2, a partial view of this device, with and without the locking device of the invention,
  • Figure 3, a partial sectional view of the end of the measuring device, with a plug inserted and locked.

L'appareil de la figure 1 est un appareil de mesure classique dans lequel on reconnaît un boîtier 1, en deux parties, 2 et 3, entre lesquelles on discerne un décrochement 4 marquant le plan de joint, l'écran 5 d'un afficheur numérique et le commutateur de gamme 6.The device of FIG. 1 is a conventional measuring device in which a housing 1, in two parts, 2 and 3, is recognized, between which there is a recess 4 marking the joint plane, the screen 5 of a display digital and range switch 6.

Le dispositif de verrouillage 7 cache les orifices de quatre douilles de raccordement de cordons. Ce dispositif comprend deux ailes, 8 et 9, jointes par une traverse 10 et constituant un adaptateur de verrouillage portant les quatre languettes 11, 12, 13, 14 correspondant aux quatre douilles. Ces quatre languettes sont pourvues d'évidements 15, 16, 17, 18 dans lesquels sont enfichées les fiches des cordons selon les besoins. Les languettes servent à retenir les fiches comme on va le voir maintenant en se reportant aux figures 2 et 3.The locking device 7 conceals the orifices of four connection sockets for cords. This device comprises two wings, 8 and 9, joined by a cross member 10 and constituting a locking adapter carrying the four tabs 11, 12, 13, 14 corresponding to the four sockets. These four tabs are provided with recesses 15, 16, 17, 18 in which the plugs of the cords are inserted as required. The tabs are used to retain the cards as we will now see with reference to Figures 2 and 3.

On considèrera d'abord la figure 3 représentant l'extrémité du boîtier 1, en coupe longitudinale par l'axe de l'évidement 18 de la languette 14. On retrouve donc les parties supérieure (3) et inférieure (2) du boîtier 1, ainsi que le décrochement 4 matérialisant le plan de joint entre ces deux parties.We will first consider Figure 3 showing the end of the housing 1, in longitudinal section through the axis of the recess 18 of the tongue 14. We therefore find the upper (3) and lower (2) parts of the housing 1 , as well as the step 4 materializing the joint plane between these two parts.

Dans la partie supérieure 3 du boîtier est monté un corps cylindrique 19 contenant une douille 20. Le corps 19, en matière plastique isolante, tout comme le boîtier 1 est soudé ou vissé à celui-ci. La douille 20 est en métal conducteur et se prolonge par une broche 21 traversant le fond du corps 19 de manière étanche.In the upper part 3 of the housing is mounted a cylindrical body 19 containing a socket 20. The body 19, made of insulating plastic, just like the housing 1 is welded or screwed to it. The socket 20 is made of conductive metal and is extended by a pin 21 passing through the bottom of the body 19 in a sealed manner.

La figure 3 illustre encore une fiche 30 comprenant essentiellement un corps 31 et une broche 32. Le corps de fiche est en matière plastique isolante, tandis que la broche 32, en métal conducteur est connectée, de manière non représentée, au conducteur interne du cordon 34. Comme on peut le voir par des traits interrompus sur la figure, la surface externe 33 de la broche 32 s'adapte à la surface interne 22 de la douille 20 pour un contact électrique approprié.FIG. 3 also illustrates a plug 30 essentially comprising a body 31 and a pin 32. The plug body is made of insulating plastic, while the pin 32, of conductive metal, is connected, in a manner not shown, to the internal conductor of the cord. 34. As can be seen by broken lines in the figure, the external surface 33 of the pin 32 adapts to the internal surface 22 of the socket 20 for appropriate electrical contact.

Par ailleurs, cette fiche 30 comporte deux rainures circulaires 35, 36 qui, en l'absence du dispositif de verrouillage 7, resteraient à l'extérieur du boîtier 1 pour matérialiser la profondeur d'enfichage de la fiche et offrir une prise en facilitant l'extraction manuelle.Furthermore, this plug 30 has two circular grooves 35, 36 which, in the absence of the locking device 7, would remain outside the housing 1 to materialize the depth of insertion of the plug and offer a grip by facilitating the manual extraction.

Toujours sur la figure 3, on retrouve donc le dispositif de verrouillage 7, avec la languette 14 et la traverse 10. Cette dernière s'appuie contre la partie 3 du boîtier et comprend une nervure 37, qui peut être partielle seulement, s'encastrant dans le décrochement 4. On peut voir, sur la figure 2, que le dispositif de verrouillage comprend aussi une nervure 38, perpendiculaire à la nervure 37, coopérant avec une saignée 39 de la partie 3 du boîtier 1, aux deux extrémités du dispositif. Ces moyens permettent le montage amovible du dispositif 7 sur le boîtier 1 par engagement et coulissement des nervures 38 dans les saignées 39 jusqu'à ce que la nervure 37 s'encliquete dans le décrochement 4, situation illustrée par la figure 1. La forme en queue d'aronde des nervures 38 et des saignées 39 est telle que le dispositif 7 ne peut être séparé du boîtier 1 que par un effort vertical de bas en haut qui ne peut se produire accidentellement.Still in FIG. 3, there is therefore the locking device 7, with the tongue 14 and the cross-member 10. The latter bears against part 3 of the housing and includes a rib 37, which may be only partial, fitting in in the recess 4. It can be seen, in FIG. 2, that the locking device also comprises a rib 38, perpendicular to the rib 37, cooperating with a groove 39 in the part 3 of the housing 1, at the two ends of the device. These means allow the removable mounting of the device 7 on the housing 1 by engagement and sliding of the ribs 38 in the grooves 39 until the rib 37 snaps into the recess 4, situation illustrated in Figure 1. The shape in dovetail of the ribs 38 and of the grooves 39 is such that the device 7 can only be separated from the housing 1 by a vertical force from the bottom up which cannot happen accidentally.

La languette 14 (fig. 3) est associée à la traverse 10 par une articulation 40 comprenant une partie coudée dont une extrémité 41 supporte la languette 14, dans son prolongement et dont l'autre extrémité 42 s'étend vers la surface 43 du boîtier 1 et se prolonge au-delà par la traverse 10.The tongue 14 (fig. 3) is associated with the cross-member 10 by an articulation 40 comprising a bent part, one end 41 of which supports the tongue 14, in its extension and the other end 42 of which extends towards the surface 43 of the housing 1 and is extended beyond by the crosspiece 10.

Les dimensions de cette partie coudée sont telles que la languette 14, au repos, dans la position représentée en particulier aux figures 1 et 3, est parallèle à la surface 43 du boîtier dans laquelle sont disposées les douilles de connexion, à une certaine distance de celle-ci.The dimensions of this bent part are such that the tongue 14, at rest, in the position shown in particular in Figures 1 and 3, is parallel to the surface 43 of the housing in which the connection sockets are arranged, at a certain distance from this one.

Cette articulation 40 porte de plus une saillie faisant poussoir 44. En poussant sur le poussoir 44 en direction de l'extrémité de la languette 14, on peut déverrouiller la fiche 30 comme on le verra ultérieurement.This articulation 40 further carries a projection pushing 44. By pushing on the push 44 towards the end of the tongue 14, the plug 30 can be unlocked as will be seen later.

L'évidement 18 de la languette 14 est excentré par rapport au corps de douille 19, comme on peut le voir en comparant les deux moitiés de la figure 2 et en observant la vue en coupe de la figure 3. Le bord 45 de cet évidement, opposé à l'articulation 40, empiète donc sur l'orifice du corps de douille 19. La fiche 30, lors de son insertion dans le corps de douille 19, écarte, vers la gauche sur la figure, le bord 45 qui glisse sur la surface extérieure de la fiche jusqu'à venir s'engager dans la rainure 35. Alors, l'enfichage est complet. Pour faciliter le mouvement d'enfichage, l'évidement 18 comprend un chanfrein 46 du côté du bord 45.The recess 18 of the tongue 14 is eccentric relative to the sleeve body 19, as can be seen by comparing the two halves of Figure 2 and observing the sectional view of Figure 3. The edge 45 of this recess , opposite the articulation 40, therefore encroaches on the orifice of the sleeve body 19. The plug 30, when inserted into the sleeve body 19, spreads, to the left in the figure, the edge 45 which slides on the outer surface of the plug until it engages in groove 35. Then, the insertion is complete. To facilitate the plug-in movement, the recess 18 comprises a chamfer 46 on the side of the edge 45.

A ce moment le verrouillage de la fiche est effectif. Un effort d'extraction axial tend à soulever la languette 14 en même temps que la fiche. Cela se traduit par une force appliquée au bord 45 et supportée au point d'appui 47 où l'extrémité 42 de la partie coudée atteint la surface 43. Cette force est transversale et engage fortement la languette dans la rainure et toute la fiche contre la paroi opposée du corps 19 de la douille. Les nervures 37 et 38 résistent et la fiche est maintenue efficacement et de façon fiable.At this moment the locking of the plug is effective. An axial extraction force tends to lift the tongue 14 at the same time as the plug. This results in a force applied to the edge 45 and supported at the fulcrum 47 where the end 42 of the bent part reaches the surface 43. This force is transverse and strongly engages the tongue in the groove and the entire plug against the opposite wall of the body 19 of the sleeve. The ribs 37 and 38 resist and the plug is held efficiently and reliably.

Pour retirer la fiche, il faut exercer une force sur le poussoir 44 ou directement sur la languette 14, afin de déformer la partie coudée et d'écarter vers la gauche, sur la figure 3, le bord 45, pour le faire sortir de la rainure 35. Alors une traction sur la fiche peut la libérer.To remove the plug, it is necessary to exert a force on the pusher 44 or directly on the tongue 14, in order to deform the bent part and to spread to the left, in FIG. 3, the edge 45, to bring it out of the groove 35. Then a pull on the plug can release it.

En considérant maintenant la figure 2, en même temps que la figure 1, on voit que les languettes, plates et parallèles sont également alignées avec le bord supérieur des ailes 7, 9, formant un bloc de faible épaisseur qui vient recouvrir l'angle du boîtier de l'appareil sans en rompre la ligne. Entre ces languettes et ailes, les fentes telles que 50 sont assez larges pour éviter tout coincement, mais des dents latérales telles que 51 permettent de limiter tout déplacement latéral. Ces dispositions satisfont à la fois des besoins mécaniques et des préoccupations esthétiques.Now considering FIG. 2, at the same time as FIG. 1, it can be seen that the tongues, flat and parallel, are also aligned with the upper edge of the wings 7, 9, forming a thin block which covers the angle of the device housing without breaking the line. Between these tabs and wings, the slots such as 50 are wide enough to avoid jamming, but lateral teeth such as 51 make it possible to limit any lateral movement. These provisions satisfy both mechanical needs and aesthetic concerns.

L'ensemble du dispositif 7, tel que représenté, peut être réalisé en une seule pièce de matière plastique moulée et d'un faible coût. On remarquera enfin que la seule modification apportée à l'appareil est l'adjonction des rainures 39, dans la masse du boîtier, de sorte que l'étanchéité de ce boîtier, en particulier, n'est en aucune manière atteinte.The entire device 7, as shown, can be made in a single piece of molded plastic and of low cost. Finally, note that the only modification made to the device is the addition grooves 39 in the mass of the housing, so that the tightness of this housing, in particular, is in no way affected.

Claims (6)

  1. Locking device for an electrical connection plug (30) into a socket (20) of a measuring apparatus, characterized in that it comprises an elastically deformable element connected to the apparatus by means of a hinge and engaging by means of cooperating shapes with a portion (35) of the plug (30) so as to retain it in the socket, the release of the plug being obtained by elastic deformation of the element which comprises a tab (14) transversally arranged in front of the opening of the socket (19) and being provided with a recess (18), through which the plug passes, arranged excentrically with respect to the body of the socket, and the edge (45) of which opposed to said hinge (40) cooperates by its shape with said portion of plug during its insertion.
  2. Locking device as claimed in claim 1, characterized in that said hinge (40) is an elbowed section whose one end (41) supports said tab (14) at a distance from the instrument housing, the other end (42) of this elbowed section extending towards the surface (43) of the housing (1) of the instrument.
  3. Locking device as claimed in claim 2, characterized in that a push part (44) is associated to said hinge (40) so as to move, through elastic deformation of the hinge, the tab in the direction of the housing and parallel to its surface.
  4. Locking device as claimed in any one of the preceding claims, characterized in that, as the instrument has several sockets, the locking device contains a number of tabs (11, 12, 13, 14), each connected by a hinge to a common locking adapter.
  5. Locking device as claimed in claim 4, characterized in that the said locking adapter comprises fastening means (37, 38) in view of detachable mounting onto the housing (4, 39).
  6. Locking device as claimed in any one of the preceding claims, characterized in that it is produced as a single part of molded material.
EP86402078A 1985-09-23 1986-09-23 Locking device for a pin contact of a measuring apparatus Expired - Lifetime EP0220977B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8514046 1985-09-23
FR8514046A FR2587849B1 (en) 1985-09-23 1985-09-23 PLUG LOCKING DEVICE FOR MEASURING APPARATUS

Publications (3)

Publication Number Publication Date
EP0220977A2 EP0220977A2 (en) 1987-05-06
EP0220977A3 EP0220977A3 (en) 1988-07-13
EP0220977B1 true EP0220977B1 (en) 1992-03-11

Family

ID=9323140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402078A Expired - Lifetime EP0220977B1 (en) 1985-09-23 1986-09-23 Locking device for a pin contact of a measuring apparatus

Country Status (6)

Country Link
US (1) US4687271A (en)
EP (1) EP0220977B1 (en)
JP (1) JPS62110281A (en)
KR (1) KR870003590A (en)
DE (1) DE3684233D1 (en)
FR (1) FR2587849B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4861276A (en) * 1988-02-25 1989-08-29 Hayes Microcomputer Products, Inc. Adaptor with notched strain relief plate
FR2637153B1 (en) * 1988-09-27 1993-03-26 Itt Composants Instr ELECTRICAL DEVICE WITH IMPROVED BATTERY COMPARTMENT
FR2637152B1 (en) * 1988-09-27 1994-04-15 Itt Composants Instruments WATERPROOF CASE, ESPECIALLY FOR AN ELECTRICAL APPARATUS
DE4438239C1 (en) * 1994-10-26 1996-06-05 Mueller & Weigert Battery operated measuring device, in particular a clamp application device
US6676428B2 (en) * 2001-02-28 2004-01-13 Burton Technologies, Llc Securing device for electrical connectors
US7686930B2 (en) * 2005-02-25 2010-03-30 Thermo Orion, Inc. Secure meter
US8944844B2 (en) * 2013-01-18 2015-02-03 Tyco Electronics Corporation Connector mating assurance

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US1928580A (en) * 1928-05-15 1933-09-26 Douglas K Warner Apparatus for cooling
GB580821A (en) * 1944-04-04 1946-09-20 Dunlop Rubber Co An improved electric connection device of the plug and socket type
GB896119A (en) * 1959-07-21 1962-05-09 Burndy Corp Locking terminal block
US3046513A (en) * 1961-01-30 1962-07-24 Gen Electric Detachable electrical connector
US3643205A (en) * 1969-10-13 1972-02-15 Bunker Ramo Telephone handset connector
US3659248A (en) * 1970-05-04 1972-04-25 Gen Electric Combined socket cover and plug retainer
DE2308294C3 (en) * 1973-02-16 1980-09-11 Cavis - Cavetti Isolati S.P.A., Felizzano, Alessandria (Italien) Plug connection for light guide channel
US3874763A (en) * 1973-11-26 1975-04-01 Amp Inc Plug for patch systems
US4227762A (en) * 1979-07-30 1980-10-14 Vaughn Corporation Electrical connector assembly with latching bar
US4319733A (en) * 1980-01-22 1982-03-16 Amp Incorporated Locking spring clip
DE3105808A1 (en) * 1981-02-18 1982-09-09 Stocko Metallwarenfabriken Henkels Und Sohn Gmbh & Co, 5600 Wuppertal Electrical plug connector
US4407556A (en) * 1981-09-21 1983-10-04 Teletype Corporation Retaining clip for an electrical connector

Also Published As

Publication number Publication date
KR870003590A (en) 1987-04-18
JPS62110281A (en) 1987-05-21
FR2587849A1 (en) 1987-03-27
DE3684233D1 (en) 1992-04-16
EP0220977A3 (en) 1988-07-13
EP0220977A2 (en) 1987-05-06
US4687271A (en) 1987-08-18
FR2587849B1 (en) 1989-11-10

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