EP0274605B1 - Plug with protective contact provided with pin supporting bridge and protection cap - Google Patents
Plug with protective contact provided with pin supporting bridge and protection cap Download PDFInfo
- Publication number
- EP0274605B1 EP0274605B1 EP19870116636 EP87116636A EP0274605B1 EP 0274605 B1 EP0274605 B1 EP 0274605B1 EP 19870116636 EP19870116636 EP 19870116636 EP 87116636 A EP87116636 A EP 87116636A EP 0274605 B1 EP0274605 B1 EP 0274605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- bridge
- protective
- connecting web
- projection
- 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
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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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/655—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding with earth brace
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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
- H01R2103/00—Two poles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
- H01R24/30—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable with additional earth or shield contacts
Definitions
- the present invention relates to a safety plug according to the preamble of patent claim 1.
- Plugs of this type are known and on the whole have also proven themselves. Basically, these protective contact plugs hate the task of not allowing the handling of an electrical device, i.e. connecting this device when the connector is plugged into the mains socket, to endanger people, for example due to a so-called earth fault.
- the person who puts the plug in the socket can suffer health damage that can even lead to death.
- the finished earthing contact plugs are individually checked for their electrical safety using so-called contour testing devices.
- the plug is inserted into a test form corresponding to its shape and electrically charged from the outside.
- plugs with individual wires that protrude outwards or are too close apart can be eliminated.
- this is associated with considerable production costs.
- protective caps were designed, which are molded onto the plug bridge before the protective contact plug is molded around be plugged in to secure the space around the soldering points of the current conductors and the protective conductor to the outside.
- This protective cap is designed according to the contour of the plug bridge; it is inserted over the free space corresponding to the U-shape of the connector bridge and is flush with the inner bottom surface of the U.
- the protective cap is non-positively latched onto the connector bridge via two locking lugs that extend laterally across the bottom of the U.
- the object on which the present invention is based is to specify a protective contact plug of the generic type in which the electrical safety is further optimized.
- this object is achieved in that the protective cap has a shoulder projecting beyond the connecting web of the U in the region of the open sides.
- the concept according to the invention has, in addition to the advantage achieved according to the task, the advantage over the prior art that less material is required when encapsulating the assembly unit consisting of plug bridge and protective cap, that is to say when producing the end product "protective contact plug".
- the material for overmolding the assembly unit mentioned that is, the soft-elastic plastic, more expensive than the hard-elastic or inelastic plastic from which the protective cap is made; and the space filled by the approach according to the invention finally no longer needs to be sprayed out.
- the plug bridge (1) according to Fig. 1a consists essentially of a U-shaped molded part (10) made of hard elastic plastic.
- the two legs (11, 12) of the U delimit a free space (13) and are connected to one another via a connecting web (14).
- the connecting web (14) protrudes laterally on both sides of the U and has an approximately trapezoidal outer contour, the shorter diagonal of which is dimensioned in accordance with the standardized spacing of the contact pins or contact sockets of the mains socket.
- the plug bridge (1) described so far with regard to the basic mechanical shape is electrically equipped as follows: On the outside of the connecting web (14) protrude at the standardized distance mentioned and with a standardized length to the outside (with the contact pins 15 the plug ultimately becomes 15) into an electrical outlet introduced).
- the contact pins (15) are firmly seated in corresponding bores of the connecting web (14) and they are (at the second end) extended to the rear to such an extent that they protrude into the interior of the U-shaped part (10) in the form of connecting pins (16). With these connection pins (16), the current conductors of a consumer line (17) are ultimately mechanically crimped or crimped.
- the electrical system is completed by a protective conductor (18) which, as part of the consumer line (17), is connected to a third connecting pin (19) on the inside of the connecting web (14).
- the connection pins (16) of the power line and this third connection pin (19) are arranged in a triangle to one another.
- the connector pin (19) is connected to contact springs arranged on the outer sides of the legs (11, 12) of the U-shaped molded part (10), which when the protective contact plug is plugged into the mains socket, these are connected to a coupling located in the device to be connected, so that the protective conductor of the consumer line and thus the device itself have a ground fault.
- FIG. 1b this protective cap (2) is shown in perspective, in a view showing the assignment to the connector bridge (1) according to Fig. 1a.
- the plug bridge (1) and the protective cap (2) are joined together in the direction of arrow X to form an assembly unit.
- the protective cap (2) has the shape and effect of a cover.
- the outer contours are fundamentally adapted to the free space (13) of the plug bridge (1) or are designed in accordance with the arrangement of the connecting pins (16, 19), namely in an approximately triangular basic shape.
- At the tip of this triangle there is a receiving slot (21) which, when assembled, lies above the consumer line (17).
- the interior (22) of the protective cap (2) forms approximately a triangular shaft, which can be pushed from the open side over the connecting pins (16) of the current conductor and the connecting pin (19) of the protective conductor.
- the protective cap (2) has a cantilevered projection (23) at the edge of the triangular sides adjacent to the receiving slot (21), which adjoins the triangular shaft (interior 22) in a step-like manner.
- the depth of the step is selected corresponding to the outer contour of the connecting web (14) of the plug bridge (1); the step height corresponds to the thickness of the connecting web (14).
- the lugs (23) are each provided with a latching lug (24) which is on the front of the connecting web (14), that is to say on the side from which the contact pins (15) stick out, latch.
- these detents (24) are designed so that they protrude from the free edge of the lugs (23).
- the subsequent collar part of the extension (23) is recessed up to the edge of the triangular shaft in order to give the locking lug (24) the required elasticity.
- Fig. 2 shows the protective cap (2) in a detailed construction drawing.
- the upper illustration shows the protective cap (2) viewed in the direction of the receiving slot (21).
- the outer contour is shown in a view according to which the triangular interior (22) is hidden behind the plane shown, namely the plane shown corresponds to the outside of the base side of the triangle and the tip of the triangle with the receiving slot (21) lies behind the plane of the drawing .
- the projections (23) and the locking lugs (24) provided on both sides of the triangular shaft can be seen in particular from the front view.
- the lugs (23) connect to the triangular shaft and are partially extended by the locking lugs (24).
- the top view shows the basic shape of the triangular interior (22).
- the receiving slot (21) extends from the triangular tip; on the triangular sides (25) adjacent to the receiving slot (21) the protruding lugs (23) are provided, which after the connection of the protective cap (1) and the connector bridge (2) project beyond their connecting web (14).
- the locking lugs (24) are also shown.
- the cut side view shows in particular the receiving slot (21) and the locking lugs (24) with the shoulders (23).
- the two elements plug bridge (1) and protective cap (2) are joined together in a positive and non-positive manner.
- the assembly unit created in this way is overmolded with flexible plastic, so that a finished protective contact plug (3) can be removed from the injection mold.
- This consists - as shown - of a plug head, behind which the elements according to FIG. 1a "plug bridge” and FIG. 1b (or 2) "protective cap” are hidden and which can be plugged into the mains plug via the contact pins (15) to connect a device connected to the consumer line (17) and to supply it with electrical energy.
Description
Die vorliegende Erfindung bezieht sich auf einen Schutzkontaktstecker nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a safety plug according to the preamble of
Stecker dieser Gattung sind bekannt und sie haben sich im großen und ganzen auch bewährt. Grundsätzlich haßen diese Schutzkontaktstecker die Aufgabe, die Handhabung eines elektrischen Gerätes, das heißt das Anschließen dieses Gerätes beim Einstecken des Anschlußsteckers in die Netzsteckdose, nicht zu einer Gefahr dahingehend werden zu lassen, daß etwa aufgrund eines sogenannten Erdschlusses Personen gefährdet sind.Plugs of this type are known and on the whole have also proven themselves. Basically, these protective contact plugs hate the task of not allowing the handling of an electrical device, i.e. connecting this device when the connector is plugged into the mains socket, to endanger people, for example due to a so-called earth fault.
Die Herstellung und Konzeption der Schutzkontaktstecker unterliegen strengen Auflagen und Vorschriften. Bei der modernen Massenherstellung ist besonderes Augenmerk darauf zu richten, daß die Stromleiter, die mit der Steckerbrücke verbunden sind, und die elektrische Verbindung zwischen dem Elektrizitätswerk einerseits und dem Gerät andererseits herstellen, einen hinreichenden Sicherheitsabstand zur Außenseite des Schutzkontaktsteckers haben. Schließlich besteht die Gefahr, daß sich einzelne Drähte der Stromleiter während der Herstellung beim Einführen in die Bohrung der Steckerstifte verbiegen und verkanten und von der Steckerbrücke nach außen abstehen. Wird dies nicht bemerkt, so kann es vorkommen, daß beim abschließenden Umspritzen der Steckerbrücke die abstehenden Einzeldrähte durch die Oberfläche des Schutzkontaktsteckers hindurchragen oder so nahe zur Außenseite hin liegen, daß bei der Handhabung ein Erdschluß entsteht.The manufacture and design of the safety plug are subject to strict requirements and regulations. In modern mass production, special attention should be paid to the fact that the current conductors, which are connected to the plug bridge, and establish the electrical connection between the power plant on the one hand and the device on the other hand, have a sufficient safety distance from the outside of the protective contact plug. Finally, there is a risk that individual wires of the current conductors bend and tilt during manufacture when inserted into the bore of the connector pins and protrude outward from the connector bridge. If this is not noticed, it can happen that when the connector bridge is finally encapsulated, the protruding individual wires protrude through the surface of the safety plug or are so close to the outside that an earth fault occurs during handling.
Die Person, die den Stecker in die Steckdose steckt, kann dadurch einen gesundheitlichen Schaden erleiden, der sogar zum Tod führen kann.The person who puts the plug in the socket can suffer health damage that can even lead to death.
Aus diesem Grunde werden die fertigen Schutzkontaktstecker jeweils einzeln mittels sogenannter Konturprüfeinrichtungen auf ihre elektrische Sicherheit geprüft. Der Stecker wird dazu in eine seiner Form entsprechende Prüfform eingelegt und von außen elektrisch beaufschlagt. Auf diese Weise können Stecker mit nach außen durchstehenden oder einen zu geringen Abstand aufweisenden Einzeldrähten eliminiert werden. Dies ist jedoch mit erheblichen Produktionskosten verbunden.For this reason, the finished earthing contact plugs are individually checked for their electrical safety using so-called contour testing devices. For this purpose, the plug is inserted into a test form corresponding to its shape and electrically charged from the outside. In this way, plugs with individual wires that protrude outwards or are too close apart can be eliminated. However, this is associated with considerable production costs.
Um die genannten Gefahren von vornherein zu reduzieren, wurden sogenannte Schutzkappen konzipiert, die vor dem Umspritzen des Schutzkontaktsteckers auf die Steckerbrücke gesteckt werden, um den Raum um die Lötstellen der Stromleiter und des Schutzleiters nach außen abzusichern. Diese Schutzkappe ist der Kontur der Steckerbrücke entsprechend ausgebildet; sie wird über den der U-Form der Steckerbrücke entsprechenden Freiraum gesteckt und steht bündig an der inneren Bodenfläche des U an. Über zwei seitlich über den Boden des U übergreifende Rastnasen wird die Schutzkappe kraftschlüssig an der Steckerbrücke eingeklinkt.In order to reduce the dangers mentioned from the outset, so-called protective caps were designed, which are molded onto the plug bridge before the protective contact plug is molded around be plugged in to secure the space around the soldering points of the current conductors and the protective conductor to the outside. This protective cap is designed according to the contour of the plug bridge; it is inserted over the free space corresponding to the U-shape of the connector bridge and is flush with the inner bottom surface of the U. The protective cap is non-positively latched onto the connector bridge via two locking lugs that extend laterally across the bottom of the U.
Dadurch, daß die Schutzkappe bündig auf der Innenseite der Steckerbrücke aufsteht, besteht noch immer die Möglichkeit und Gefahr, daß einzelne Leiterdrähte zwischen den Anlageflächen von Steckerbrücke einerseits und Schutzkappe andererseits nach außen abstehen.Because the protective cap stands flush on the inside of the connector bridge, there is still the possibility and risk that individual conductor wires protrude outwards between the contact surfaces of the connector bridge on the one hand and the protective cap on the other.
Die der vorliegenden Erfindung zugrundeliegende Aufgabe besteht darin, einen Schutzkontaktstecker der gattungsgemäßen Art anzugeben, bei dem die elektrische Sicherheit weiter optimiert ist.The object on which the present invention is based is to specify a protective contact plug of the generic type in which the electrical safety is further optimized.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Schutzkappe einen den Verbindungssteg des U im Bereich der offenen Seiten überkragenden Ansatz aufweist.According to the invention, this object is achieved in that the protective cap has a shoulder projecting beyond the connecting web of the U in the region of the open sides.
Weiterbildungen dieser Schutzkappe sind Gegenstand der Unteransprüche.Developments of this protective cap are the subject of the subclaims.
Die erfindungsgemäße Konzeption hat zusätzlich zu dem aufgabengemäß erzielten Vorzug dem Stand der Technik gegenüber noch den Vorteil, daß beim Umspritzen der aus Steckerbrücke und Schutzkappe bestehenden Montageeinheit, das heißt beim Herstellen des Endprodukts "Schutzkontaktstecker" weniger Material erforderlich ist. Schließlich ist das Material zum Umspritzen der genannten Montageeinheit, das heißt der weichelastische Kunststoff, teurer als der hartelastische beziehungsweise inelastische Kunststoff, aus dem die Schutzkappe besteht; und der vom erfindungsgemäßen Ansatz ausgefüllte Raum braucht schließlich nicht mehr ausgespritzt zu werden.The concept according to the invention has, in addition to the advantage achieved according to the task, the advantage over the prior art that less material is required when encapsulating the assembly unit consisting of plug bridge and protective cap, that is to say when producing the end product "protective contact plug". Finally, the material for overmolding the assembly unit mentioned, that is, the soft-elastic plastic, more expensive than the hard-elastic or inelastic plastic from which the protective cap is made; and the space filled by the approach according to the invention finally no longer needs to be sprayed out.
Die Erfindung wird im folgenden anhand der Zeichung näher erläutert:
- Fig. 1a
- zeigt eine Steckerbrücke in Perspektivdarstellung;
- Fig. 1b
- zeigt eine Schutzkappe in Perspektivdarstellung;
- Fig. 2
- zeigt die Schutzkappe nach Fig. 1a in konstruktiver Detaildarstellung;
- Fig. 3
- zeigt einen fertigen Schutzkontaktstecker.
- Fig. 1a
- shows a jumper in perspective view;
- Fig. 1b
- shows a protective cap in perspective;
- Fig. 2
- shows the protective cap of Figure 1a in a constructive detailed view.
- Fig. 3
- shows a finished protective contact plug.
Die Steckerbrücke (1) nach Fig. 1a besteht im wesentlichen aus einem U-förmigen Formteil (10) aus hartelastischem Kunststoff. Die beiden Schenkel (11,12) des U begrenzen einen Freiraum (13) und sind über einen Verbindungssteg (14) miteinander verbunden.The plug bridge (1) according to Fig. 1a consists essentially of a U-shaped molded part (10) made of hard elastic plastic. The two legs (11, 12) of the U delimit a free space (13) and are connected to one another via a connecting web (14).
Der Verbindungssteg (14) kragt zu beiden Seiten des U seitlich aus und hat eine etwa trapezförmige Außenkontur, deren kürzere Diagonale dem genormten Abstand der Kontaktstifte beziehungsweise Kontaktbuchsen der Netzsteckdose entsprechend dimensioniert ist.The connecting web (14) protrudes laterally on both sides of the U and has an approximately trapezoidal outer contour, the shorter diagonal of which is dimensioned in accordance with the standardized spacing of the contact pins or contact sockets of the mains socket.
Die soweit bezüglich der mechanischen Grundform beschriebene Steckerbrücke (1) ist elektrisch wie folgt bestückt: An der Außenseite des Verbindungsstegs (14) ragen im erwähnten genormten Abstand zueinander und mit genormter Länge Kontaktstifte (15) nach außen (mit den Kontaktstiften 15 wird der Stecker letztlich in eine Netzsteckdose eingeführt). Die Kontaktstifte (15) sitzen fest in entsprechenden Bohrungen des Verbindungstegs (14) und sie sind (am zweiten Ende) rückseitig soweit verlängert, daß sie in Form von Anschlußstiften (16) ins Innere des U-förmigen Formteils (10) ragen. Mit diesen Anschlußstiften (16) werden letztlich die Stromleiter einer Verbraucherleitung (17) mechanisch angecrimpt oder verquetscht.The plug bridge (1) described so far with regard to the basic mechanical shape is electrically equipped as follows: On the outside of the connecting web (14) protrude at the standardized distance mentioned and with a standardized length to the outside (with the
Das elektrische System wird durch einen Schutzleiter (18) komplettiert, der als Teil der Verbraucherleitung (17) mit einem dritten Anschlußstift (19) an der Innenseite des Verbindungsstegs (14) verbunden ist. Die Anschlußstifte (16) der Stromleitung und dieser dritte Anschlußstift (19) sind im Dreieck zueinander angeordnet. Der Anschlußstift (19) ist mit an den Außenseiten der Schenkel (11, 12) des U-förmigen Formteils (10) angeordneten Kontaktfedern verbunden, die beim Einstecken des Schutzkontaktsteckers in die Netzsteckdose diese mit einer sich im anzuschließenden Gerät befindlichen Kupplung verbinden, so daß der Schutzleiter der Verbraucherleitung und damit das Gerät selbst Erdschluß haben.The electrical system is completed by a protective conductor (18) which, as part of the consumer line (17), is connected to a third connecting pin (19) on the inside of the connecting web (14). The connection pins (16) of the power line and this third connection pin (19) are arranged in a triangle to one another. The connector pin (19) is connected to contact springs arranged on the outer sides of the legs (11, 12) of the U-shaped molded part (10), which when the protective contact plug is plugged into the mains socket, these are connected to a coupling located in the device to be connected, so that the protective conductor of the consumer line and thus the device itself have a ground fault.
Die soweit beschriebene Steckerbrücke (1) ist Stand der Technik. Beim Umspritzen dieser Steckerbrücke zwecks Endfertigung des Schutzkontaktsteckers können nun die eingangs genannten Probleme auftreten. Bei seitlich abstehenden Einzeldrähten der Stromleiter kann es vorkommen, daß diese bis nach außen durch den gespritzten Steckerkopf ragen.The plug bridge (1) described so far is state of the art. When encapsulating this plug bridge for the purpose of finishing the protective contact plug, the problems mentioned at the beginning can now occur. With individual wires protruding from the side, it can happen that they protrude outwards through the molded plug head.
Um dieses Risiko gänzlich auszuschalten, wird die Schutzkappe (2) nach Fig. 1b und Fig. 2 vorgeschlagen. Diese Art von Schutzkappe gilt sowohl für Schukostecker, Konturenstecker als auch für Eurostecker.In order to completely eliminate this risk, the protective cap (2) according to FIGS. 1b and 2 is proposed. This type of protective cap applies to both Schuko plugs, contour plugs and Euro plugs.
In Fig. 1b ist diese Schutzkappe (2) perspektivisch dargestellt, und zwar in einer Ansicht, die die Zuordnung zur Steckerbrücke (1) nach Fig. 1a zeigt. Die Steckerbrücke (1) und die Schutzkappe (2) werden in Richtung des Pfeils X zu einer Montageeinheit zusammengefügt.In Fig. 1b this protective cap (2) is shown in perspective, in a view showing the assignment to the connector bridge (1) according to Fig. 1a. The plug bridge (1) and the protective cap (2) are joined together in the direction of arrow X to form an assembly unit.
Die Schutzkappe (2) hat die Form und Wirkung einer Abdeckhaube. Die Außenkonturen sind grundsätzlich dem Freiraum (13) der Steckerbrücke (1) angepaßt beziehungsweise der Anordnung der Anschlußstifte (16, 19) entsprechend ausgebildet, und zwar einer etwa dreieckförmigen Grundform entsprechend. An einer Spitze dieses Dreiecks ist ein Aufnahmeschlitz (21) vorgesehen, der im montierten Zustand über der Verbraucherleitung (17) liegt. Der Innenraum (22) der Schutzkappe (2) bildet etwa einen dreieckförmigen Schacht, der von der offenen Seite her über die Anschlußstifte (16) der Stromleiter und den Anschlußstift (19) des Schutzleiters geschoben werden können.The protective cap (2) has the shape and effect of a cover. The outer contours are fundamentally adapted to the free space (13) of the plug bridge (1) or are designed in accordance with the arrangement of the connecting pins (16, 19), namely in an approximately triangular basic shape. At the tip of this triangle there is a receiving slot (21) which, when assembled, lies above the consumer line (17). The interior (22) of the protective cap (2) forms approximately a triangular shaft, which can be pushed from the open side over the connecting pins (16) of the current conductor and the connecting pin (19) of the protective conductor.
Die Schutzkappe (2) weist am Rand der dem Aufnahmeschlitz (21) benachbarten Dreieckseiten je einen auskragenden Ansatz (23) auf, der stufenförmig an den dreieckförmigen Schacht (Innenraum 22) anschließt. Die Stufentiefe ist der Außenkontur des Verbindungsstegs (14) der Steckerbrücke (1) entsprechend gewählt; die Stufenhöhe entspricht der Stärke des Verbindungsstegs (14).The protective cap (2) has a cantilevered projection (23) at the edge of the triangular sides adjacent to the receiving slot (21), which adjoins the triangular shaft (interior 22) in a step-like manner. The depth of the step is selected corresponding to the outer contour of the connecting web (14) of the plug bridge (1); the step height corresponds to the thickness of the connecting web (14).
Beim Zusammenführen von Steckerbrücke (1) und Schutzkappe (2) übergreift der Ansatz (23) somit den Verbindungssteg (14) im Bereich der offenen Seite des U-förmigen Formteils (10).When the connector bridge (1) and protective cap (2) are brought together, the extension (23) thus overlaps the connecting web (14) in the region of the open side of the U-shaped molded part (10).
Zur kraftschlüssigen Verbindung der beiden Teile Steckerbrücke (1) und Schutzkappe (2) sind die Ansätze (23) je mit einer Rastnase (24) versehen, die an die Vorderseite des Verbindungsstegs (14), das heißt an der Seite, von der die Kontaktstifte (15) abstehen, einklinken. In erfindungsgemäßer Ausführungsform sind diese Rastnasen (24) so konzipiert, daß sie von der freien Kante der Ansätze (23) abstehen. Der anschließende Kragenteil des Ansatzes (23) ist bis zur Kante des dreieckförmigen Schachtes ausgespart, um der Rastnase (24) die erforderliche Elastizität zu geben.For the non-positive connection of the two parts of the connector bridge (1) and protective cap (2), the lugs (23) are each provided with a latching lug (24) which is on the front of the connecting web (14), that is to say on the side from which the contact pins (15) stick out, latch. In the embodiment according to the invention, these detents (24) are designed so that they protrude from the free edge of the lugs (23). The subsequent collar part of the extension (23) is recessed up to the edge of the triangular shaft in order to give the locking lug (24) the required elasticity.
Fig. 2 zeigt die Schutzkappe (2) in detaillierter Konstruktionszeichnung.Fig. 2 shows the protective cap (2) in a detailed construction drawing.
Die obere Darstellung (Vorderansicht) zeigt die Schutzkappe (2) in Richtung des Aufnahmeschlitzes (21) betrachtet. Dargestellt ist die Außenkontur in einer Ansicht, gemäß der hinter der gezeigten Ebene sich der dreieckförmige Innenraum (22) verbirgt, und zwar entspricht die gezeigte Ebene der Außenseite der Grundseite des Dreiecks und die Spitze des Dreiecks mit dem Aufnahmeschlitz (21) liegt hinter der Zeichenebene.The upper illustration (front view) shows the protective cap (2) viewed in the direction of the receiving slot (21). The outer contour is shown in a view according to which the triangular interior (22) is hidden behind the plane shown, namely the plane shown corresponds to the outside of the base side of the triangle and the tip of the triangle with the receiving slot (21) lies behind the plane of the drawing .
Aus der Vorderansicht sind insbesondere die beiderseits des dreieckförmigen Schachts vorgesehenen Ansätze (23) und die Rastnasen (24) zu ersehen. Die Ansätze (23) schließen an den dreieckförmigen Schacht an und sind partiell um die Rastnasen (24) verlängert.The projections (23) and the locking lugs (24) provided on both sides of the triangular shaft can be seen in particular from the front view. The lugs (23) connect to the triangular shaft and are partially extended by the locking lugs (24).
Die Aufsicht zeigt die Grundform des dreieckförmigen Innenraums (22). Von der Dreieckspitze geht der Aufnahmeschlitz (21) aus; an den dem Aufnahmeschlitz (21) benachbarten Dreieckseiten (25) sind die abstehenden Ansätze (23) vorgesehen, die nach der Verbindung der Schutzkappe (1) und der Steckerbrücke (2) deren Verbindungssteg (14) überkragen. Die Rastnasen (24) sind ebenfalls dargestellt.The top view shows the basic shape of the triangular interior (22). The receiving slot (21) extends from the triangular tip; on the triangular sides (25) adjacent to the receiving slot (21) the protruding lugs (23) are provided, which after the connection of the protective cap (1) and the connector bridge (2) project beyond their connecting web (14). The locking lugs (24) are also shown.
Der geschnittenen Seitenansicht sind insbesondere der Aufnahmeschlitz (21) und die Rastnasen (24) mit den Ansätzen (23) zu entnehmen.The cut side view shows in particular the receiving slot (21) and the locking lugs (24) with the shoulders (23).
Anhand von Fig. 3 soll das Endprodukt "Schutzkontaktstecker" gezeigt werden.3, the end product "protective contact plug" is to be shown.
Die beiden Elemente Steckerbrücke (1) und Schutzkappe (2) sind form- und kraftschlüssig zusammengefügt. Die so entstandene Montageeinheit wird mit weichelastischem Kunststoff umspritzt, so daß ein fertiger Schutzkontaktstecker (3) der Spritzform entnommen werden kann. Dieser besteht - wie dargestellt - aus einem Steckerkopf, hinter dem sich die Elemente gemäß Fig. 1a "Steckerbrücke" und Fig. 1b (beziehungsweise 2) "Schutzkappe" verbergen und der über die Kontaktstifte (15) in den Netzstecker gesteckt werden kann, um ein mit der Verbraucherleitung (17) verbundenes Gerät anzuschließen und mit elektrischer Energie zu versorgen.The two elements plug bridge (1) and protective cap (2) are joined together in a positive and non-positive manner. The assembly unit created in this way is overmolded with flexible plastic, so that a finished protective contact plug (3) can be removed from the injection mold. This consists - as shown - of a plug head, behind which the elements according to FIG. 1a "plug bridge" and FIG. 1b (or 2) "protective cap" are hidden and which can be plugged into the mains plug via the contact pins (15) to connect a device connected to the consumer line (17) and to supply it with electrical energy.
Claims (4)
- A safety plug for electrical appliances which can be plugged into a mains socket, having a substantially U-shaped plug bridge (1) the arms (11, 12) of which are connected to one another via a connecting web (14), which is for receiving and fixing in the open region of the U the conductor and the protective conductor of a consumer's cable and which is for receiving at the base of the U the contact pins conductively connected to the conductors, the safety plug also having a one-piece protective cover (2) which can be placed over the open region of the U and can be locked to the plug bridge by means of catching means engaging on the underside of the plug bridge, characterized in that the protective cover (2) has a projection (23) jutting over the connecting web (14) of the U in the region of the open sides.
- A safety plug in accordance with Claim 1, characterized in that the projection (23) is adapted to the connecting web (14) so that they are positively locked.
- A safety plug in accordance with Claim 1 or 2, characterized in that the projection (23) is an inelastic plastics formed part.
- A safety plug in accordance with any one of Claims 1 to 3, characterized in that the catching means are part of the projection (23) in so far as the latter has a bridge-shaped protrusion projecting away from the protective cover (2), this protrusion having for its part catching noses (24) to engage on the underside of the plug bridge (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863640914 DE3640914C2 (en) | 1986-11-29 | 1986-11-29 | Earthing contact plug with jumper and protective cap |
| DE3640914 | 1986-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0274605A1 EP0274605A1 (en) | 1988-07-20 |
| EP0274605B1 true EP0274605B1 (en) | 1992-02-26 |
Family
ID=6315149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19870116636 Expired - Lifetime EP0274605B1 (en) | 1986-11-29 | 1987-11-11 | Plug with protective contact provided with pin supporting bridge and protection cap |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0274605B1 (en) |
| DE (1) | DE3640914C2 (en) |
| ES (1) | ES2030034T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8817241U1 (en) * | 1988-03-09 | 1995-05-11 | Taller Gmbh | Earthing contact plug with jumper and hollow cylindrical connecting pins for the current conductor and the protective conductor |
| DE4316962C2 (en) * | 1993-05-21 | 1996-08-08 | Taller Gmbh | Electrical device plug with a molded-on plug part and a holding plate for the contact springs |
| CN101615740B (en) * | 2008-06-25 | 2012-07-04 | 建通精密工业股份有限公司 | Improved structure of internal-frame pressure cover of powder supply plug with grounding spring piece |
| DE102012107902A1 (en) * | 2012-08-28 | 2014-03-06 | Lapp Engineering & Co. | Plug unit and electrical device with such a plug unit |
| CN104577497A (en) * | 2014-12-09 | 2015-04-29 | 东莞市永晟电线科技股份有限公司 | Circuit system power plug |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522341A (en) * | 1948-06-21 | 1950-09-12 | Emile P Brus | End plug connection to cord |
| DE1007403B (en) * | 1953-08-05 | 1957-05-02 | Bayerische Elektrozubehoer G M | Soft rubber plug |
| DE1108767B (en) * | 1957-05-02 | 1961-06-15 | Busch Jaeger Duerener Metall | Electrical plug |
| DE1490034B2 (en) * | 1964-06-30 | 1971-06-03 | CROSS-DIVIDED PLUG | |
| DE7025981U (en) * | 1970-05-18 | 1970-12-10 | Milanese Conduttori S P A Fab | ELECTRIC PLUG. |
| DE2532872C3 (en) * | 1975-07-23 | 1979-11-15 | Kabelwerke Reinshagen Gmbh, 5600 Wuppertal | Electrical connector and process for their manufacture |
| GB1595783A (en) * | 1977-09-30 | 1981-08-19 | Lucas Industries Ltd | Electrical plug and lead assembly |
| GB2060283B (en) * | 1979-10-04 | 1983-06-29 | Lucas Industries Ltd | Electrical plugs |
| GB2095924B (en) * | 1981-03-19 | 1984-12-19 | Bicc Plc | An electric plug |
| DE8324887U1 (en) * | 1983-08-30 | 1985-06-13 | Hehl, Karl, 7298 Loßburg | Cable connector for multi-core cables |
-
1986
- 1986-11-29 DE DE19863640914 patent/DE3640914C2/en not_active Expired - Lifetime
-
1987
- 1987-11-11 EP EP19870116636 patent/EP0274605B1/en not_active Expired - Lifetime
- 1987-11-11 ES ES87116636T patent/ES2030034T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3640914C2 (en) | 1994-11-03 |
| ES2030034T3 (en) | 1992-10-16 |
| EP0274605A1 (en) | 1988-07-20 |
| DE3640914A1 (en) | 1988-06-09 |
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