DE3404482A1 - Plug socket - Google Patents

Abstract

The invention relates to an electrical plug socket for the alternative insertion of different plugs. Protected-contact plug sockets in accordance with DIN 49440, which were also equipped in Form F for alternative insertion of flat plugs in accordance with DIN 49464 have not been proven with respect to the safety requirements, which was a result, in particular, of the retention of the protected-contact spring bracket and the modification to the identifying studs. In order to prevent disadvantages of the aforementioned type, but on the other hand to enable a multiple plugging-in capability in a space-saving manner in a plug socket, the invention adopts the approach of equipping a plug socket which essentially conforms to DIN 49440 with a further four insertion openings for plug pins of flat plugs in accordance with DIN 49464, in Form F. In this case, at least one, and preferably two, blocking studs are provided in the region of the vertical axis, as the significant technical change. As a result of these blocking studs, flat plugs can be inserted only in the vertical direction. However, the contour of the blocking studs additionally also allows contoured plugs in accordance with DIN 49406 in the Form F or R to be inserted into the plug socket. However, the insertion of protected-contact plugs in accordance with DIN 49441 is in consequence blocked.

Description

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The invention relates to an electrical socket yemäß Preamble of claim 1.

Such a generic electrical socket is from DE 29 1 ^! j 816 Λ1 and hereinafter referred to as the Duoversal socket. The aim of the Duoversal plug socket is to use either a protective contact plug in accordance with DIN 49 441 or alternatively for the use of one or two plugs of protection class 11 in accordance with DIN 49 464, hereinafter referred to as flat plugs for short, qeeig-

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The socket outlet is used to implement this alternative use for earthing contact plugs and flat plugs in accordance with DIN 4 9 440 provided with four additional openings. These additional insertion openings are symmetrical to the central axis connecting the cam cams, hereinafter referred to as the horizontal axis. The corresponding Earthing contact spring contacts of the socket according to DIN 49 440 are accordingly on the horizontal axis below an angle of 90 ° in the center line intersecting the center, which is referred to below as the vertical axis. Two each the additional insertion openings are accordingly on a connecting line running parallel to the vertical axis, through the central insertion openings .for the Pins of an earthing contact plug according to DIN 49 441 can go.

To realize the possibility of combining a socket for a safety plug and for one or two flat plugs In the Duoversal system, the way to do this is to follow the cams of the safety socket DIN 49 440 essentially to be omitted or to be changed so seriously that in order to achieve an adaptation to the approximately right-angled tab connectors. In this embodiment it is With the Duoversal socket it is possible to arrange two flat plugs at the same time with a parallel offset to the horizontal axis. However, a disadvantage and critical aspect of this embodiment is that when the flat plug is inserted parallel to the vertical axis, the same potential is applied to the connector pins of the corresponding flat connector, which gives the user the impression of a defect in the electrical system.

Since the bipolar. Flat plug according to DIN 49 464 for double insulated Devices (protection class II) increasing use in the household area like — kitchen and bathroom as well as the video and Phono area, the requirements to be made of it with regard to contact protection, accidentally incorrect insertion, Sufficiently strong holding force in the contact sockets or terminals, to be observed very carefully.

In this regard, it has been found by expert bodies that in particular by changing the identification cams result in considerable risks. For example, the use of various foreign earthing contact plugs with three pins, one of which represents the protective contact pin, possible. In this way, for example, the housing of a Device of protection class I can be energized. In particular, the modification of the Kennocken a shockproof socket DIN 49440 rated critically so that with regard to an improvement the corresponding to the The aforementioned DIN standard specified identification cams in any case must be maintained.

More different from the point of view of the possibility of use Plug in a socket with the safety socket according to DIN 49 440 is the possibility of receiving a corresponding one Plug according to DIN 49 441 or a plug according to DIN 49 or a flat plug according to DIN 49 464. The connector after DIN 49 406 is referred to below as a contour plug and, like the flat plug, also belongs to protection class II at.

Furthermore, an adapter plug or plug-in device according to DIN 57 620 or an adapter according to DIN 49 437 can be used.

COPY

The aforementioned combination options are different Plugs in the protective contact socket especially leave the Recognize disadvantages with regard to the flat plug, especially the protection against accidental contact with the plug pins and an insufficiently secure fit in the corresponding contact book. Basically only a flat plug can be plugged into a socket according to DIN 49 440, is also from the point of view of optimal use the plug recess or the socket pot an improvement is desirable.

To overcome the disadvantages mentioned above, a number of draft standards have been introduced, of which the most important in DIN 49 440, part 2, from November 1983 and of DIN 49 437, also from November 1983, can be seen. There are also drafts of DIN 57 6 20 A 24 from October 1983 or A 25 from November 1983 and A 26 from December 1983 each to DIN 57 620.

For example, in the draft of DIN 49 440, Part 2, it is proposed that a mobile multiple socket in a combination of a socket according to DIN 49 440 and one or more Sockets that are suitable for the sole inclusion of a single two-pin plug in accordance with DIN 49 464, Part 1, in the form F. is to empty. Such a multiple socket achieved a high safety standard, but the serious disadvantage is that these sockets of the protection class II not for all plugs of protection class II, especially not

in
can be used for connectors according to DTN 49 906 ^{v of} the form F and / or R, and_

therefore do not represent an optimally usable, space-saving socket version. The invention is therefore based on the object of designing a generic electrical socket so that it can be used for The plug of the protective flap II is almost unlimited and under consideration the security technical requirements usable is, with the space-saving aspects of a multiple arrangement

according to '' possibility. "Should be taken into account and the suitability, in particular for contour plugs according to DIN 49 406, should be given, however, the use with protective contact plugs according to DIN 4 9 441 should be reliably prevented.

This task is performed with an electrical socket according to the preamble of claim 1 solved according to the invention by the features of the characterizing part of claim 1.

The core idea of the invention is accordingly to be seen in the case of a socket which is included in the main criteria of DIN 49 corresponds to keeping the identification cams unchanged and instead of the earthing contact spring contacts in the corresponding Area as a whole to arrange at least one locking cam in the socket pot. In addition to the one in the middle of the Insertion openings provided on the horizontal axis a further four insertion openings are provided for receiving connector pins from a maximum of two flat plugs. Because of of the locking cam or cams, the tabs can only be inserted into the socket outlet parallel to the vertical axis. The locking cams are so dimensioned and / or placed in a largely radial direction protruding into the socket pot, that the insertion of a contour plug is possible, but the insertion of a safety plug or one Horizontal arrangement of a flat plug, at least in two of the additional four insertion openings intended for flat plugs, is reliably prevented.

In terms of the basic principle, the electrical socket is in accordance with, provided symmetrically to the horizontal axis DIN 49 440 equipped, which allows the largely form-fitting reception of the plug body of contoured plugs in accordance with DIN 49 406 in the form F or R as well as the inclusion of a

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Allow plug body according to DIN 49 464 in the form R. The corresponding insertion openings for the connector pins the aforementioned connectors are on the horizontal axis. The others also for the introduction of two flat steel core specific insertion openings are like this arranged that in each case one of these insertion openings comes to lie between the horizontal and vertical axis formed quadrants. The decisive factor here is that the flat plug in the form F according to DIN 49 464 parallel to the vertical axis must be used.

That d L- Os insert the tabs in a vertical direction done .nuss, is provided by the one or more in the area of the transition of the vertical axis into the edge of the socket pot Locking cam reached. Since the socket according to the invention is intended exclusively for protection class II plugs is, the protective spring contacts, as they are in the socket according to DIN 49 440, are completely omitted. the Locking cams are matched in their geometric size so that the insertion of a flat plug in the form F only in vertically lying quadrants is possible. The locking cams, which project approximately radially inward, preferably delimit them at least «a corresponding half of the plug recess so that one or both of them are inserted into the socket pot Flat plug are at least in slight form-fitting contact with the outer contour of the flat plug. on the other hand the edge sector between the locking cams and the cam cams also forms at least one guide area, if necessary even a contact area, so that largely a multi-digit form-fitting insertion of the blade terminal is given is. This opens up the possibility of manipulation, the flat connector For example, using it incorrectly with conscious effort, avoided. In particular, by the above Locking cams a horizontal insertion of the blade terminal at least in the outermost in the vertical direction

Insertion openings prevented, that is, a diagonal-onset or horizantales _r a tab in the form F in the region of the locking cam is made by these and by the addition Kennocken impossible. The distance between the central entry openings can be designed to be as large as possible in accordance with DIN. The introduction openings of two vertical quadrants then do not lie in the vertical direction on a straight connecting line, but rather the central introduction openings are offset radially outward from this connecting straight line. In this latter embodiment,. at least the accidental insertion of foreign protective contact plugs, for example the Italian protective contact plug according to the Italian standard CEJ 23/16, is prevented. Such a faulty sticking can be completely switched off by a correspondingly large locking cam.

The one or more locking cams is or are largely complementary in shape in their geometric contour, at least in the radial plane plus 3 recesses in the contour plugs or the round plug in the form R according to DIN 4 9. For example, the locking cam in the radial plane have a width of about 3.5 to 6 mm. Preferably however, a width is selected in the lower area that still reliably enables the use of a safety plug according to DIN 4 9 441 prevented. In the radial extent, the When arranged in the vertical axis, locking cams, for example, have a dimension in the range from 3.5 to 6 mm.

To ensure the greatest possible protection against incorrect connector manipulation to have, the locking cam is preferably in one piece, similar to the cam, directly on the cylindrical peripheral wall of the socket pot formed. As an alternative to this, the locking cam, similar to the earthing contact spring contacts,

protrude from the base of the socket, what for example by means of an approximately U-shaped under the base plate The bracket attached to the socket can be realized. It is essential here that the locking cams are rigid with respect to the cylindrical circumferential wall of the socket pot must be fixed, so that intentional wrong ones even with the use of force Plugging processes can be switched off.

As an alternative to an arrangement of the locking cam (s) in the vertical axis, the locking cam fulfills its function even with a slight offset to the vertical axis. In this case, there are two opposing locking cams in the arrangement these are preferably arranged point-symmetrically to the intersection of the vertical and horizontal axes, so that in each case a locking cam forms a form-fitting limitation when inserting the Flachsteckefs. In this type of locking cam too be designed with an overall smaller geometric configuration. For reasons of form fit, however, the arrangement in particular two locking cams opposite in the vertical axis are preferred. It is particularly advantageous if the radially inner end of the locking cam is adapted to the insertion contour, for example the flat plug bevel, wherein this can be done in the form of a trapezoidal end formation.

Due to the interaction of the locking cam with a region of the cylindrical circumferential wall of the plug-in pot when it is inserted of a flat plug in the form of a form-fitting connection, bending of the flat plug in the direction of the horizontal axis is also possible largely prevented during the insertion process. This and the spatial reduction of the connector recess by means of the locking cams or, if necessary, a second flat plug that has already been inserted, the

Required protection against accidental contact is largely taken into account. The positive guide when inserting a blade terminal in the form F also allows a relatively precise geometric Design of the contact sockets arranged underneath, so that the shape guidance when plugging in and the resulting results rende insertion accuracy also an improved contact between "the plug pins and the contact sockets and a Improvement of the holding forces can be brought about.

Since some features of the shockproof socket are taken over includes the feature of the generic design of the socket pot, essentially according to DIN 49 440, that here on the design of the cam and the diameter of the socket pot is turned off. "With regard to the distance between the central insertion openings, however, this is in principle for contour plugs designed. The depth of the socket pot or the distance between the inner base plate and the edge of the Socket pot can be adapted in accordance with the new findings of the draft standards, as it is based on the special features of the protective contact system and the resulting safety reasons with regard to the immersion depth of the plug no consideration needs to be taken in the socket pot. This advantage is mainly due to the interpretation of the socket according to the invention for plug of protection class II and the omission of the protective spring contacts.

The design of the contact socket is well known and can, for example, be elec- trically conductive flat material can be realized. From the circuit principle associated with the individual inlet openings Contact sockets must be taken into account that the two central contact sockets are always in the horizontal plane, as well like the external contact sockets assigned to one another

in the vertical direction for a flat connector on different Potential. The connection between the individual contact sockets can be of various kinds be.

The socket according to the invention therefore provides an alternative plug-in option for flat plugs according to DIN 49 464 and contour plugs according to DIN 4 9 406 in a single socket, so that the socket can be used throughout Europe, especially for plugs of protection class II. Plug options that are to be viewed as critical from a safety point of view, for example with a protective contact plug according to DIN 49 441 or the comparable most important European protective contact plug systems, are therefore excluded. What is particularly noteworthy is the possibility of using the sockets for contour plugs and flat plugs, which take into account the safety-related knowledge, especially since this has not been taken into account in a new draft standard. The socket is suitable as an installed but also as a mobile socket, the latter form being able to be combined with other sockets, for example according to DIN 49 440, multiple sockets, the advantage of covering the entire spectrum of plug-in systems. Embodiments as adapters, adapter plugs, plug-in devices or coupling sockets can also be implemented with the socket according to the invention,

The invention is described below with reference to schematic drawings of an exemplary embodiment and three circuit alternatives explained in more detail. Show it:

1 shows a plan view of a socket, for example as a flush-mounted socket, with an outlined outline a flat plug according to DIN 49 464 in the form F inserted in the left half;

Fig. 2 'is a schematic representation of the electrical' '^ "connection of the under the inner base plate

the socket lying contact socket; and

3 and 4 further circuit alternatives with opposite

2 different line routing.

In Fig. 1, a socket 1 is shown as a flush-mounted socket with a square outer contour. The socket pot 2 has a circular shape and essentially corresponds to DIN 49 440. To simplify the characterization of the position of the essential elements of the socket, a horizontal axis H and a vertical axis V which intersects the center of the circle are drawn in. Edge area ci £ s socket pot 2 are symmetrical to the horizontal axis according to DIN 49 440 in plan, in principle triangular cam 4 formed in the socket.

In contrast to the earthing contact spring clips present in a socket outlet, a locking cam 3 or 3 'protrudes radially inward in the socket for plugs of protection class II in the direction of the vertical axis from the cylindrical circumferential wall of the socket pot. In the example, the locking cams 3 and 3 'are designed symmetrically to the vertical axis V, the area of a protective contact spring clip in the radial plane being indicated by a broken line at the locking cam 3' for better clarity. While the locking cam 3 ^; Top view has the shape of an elongated rectangle, the radially inner region of the lower locking cam 3 is slightly beveled in order to be able to bring about an improved form-fitting contact without impairing the inserted flat plug.

Adapted to the spacing of the connector pins for contour plugs according to DIN 49 406 or plug according to DIN 49 464 in the

Copy *

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Form R lead-in openings 8 and 9 in the base plate 17 de r socket I are provided on the horizontal axis. To realize the vertical connection capability for I-'lachstecker 10 are in the respective quadrants I to IV each have a further insertion opening ^ l 1 _r 11, 12 are formed, 12 '. The distance between two assigned insertion openings 11, or 11, 12 * in the vertical direction is adapted to the pin distance for flat plugs in the form F. In the example, the central insertion openings, which are provided in particular for contour plugs, are offset slightly radially outward in comparison to the straight line connecting two associated insertion openings 11 and 12.

In the right half of the socket 1, the corresponding contact sockets are in the corresponding insertion openings 11 and 12 15 and a corresponding contact socket 16 indicated under the insertion opening 9. To improve the Haltebzw. Clamping forces with respect to the inserted connector pins, these contact sockets are designed slightly oval, so that Spreading forces have to be overcome during insertion.

The locking cams 3 and 3 are preferably formed from the same insulation material as the socket housing itself, similar to the identification cams 4. In terms of safety and production technology, they are preferably made in one piece with the cylindrical peripheral wall of the socket pot 2 is formed. It is not necessary that they go over the entire depth of the socket pot, but one with • The aim should be to achieve a height comparable to that of the cam.

Due to the unchanged identification cams 4 according to DIN 49 440 and the larger configuration or position-specific arrangement of the locking cams 3 and 3 ¹ , the insertion of a flat plug according to DIN 49 464 in the form F is only parallel to the vertical axis V in the assigned quadrants I and IV or . II and III possible.

The Fl acha Locker H), which is in the left half of the socket 1 is indicated with a broken line, is largely forntschl üssicj on the locking cam and partially with his tapering approximately right-angled end also on the cylindrical peripheral wall of the socket pot 2. Force effects in The direction of the horizontal axis therefore do not have to be taken up by the plug pins inserted into the contact sockets but can rather be on the socket 1 via the form fit of the locking cams and the cylindrical peripheral wall be transmitted.

The flat plug indicated in the outline contour can be inserted in the horizontal direction, apart from the central insertion openings 8 and 9, prevented by the unchanged cam cams and the radially inwardly projecting locking cams.

The same also applies to a safety plug according to DIN 49 441, its insertion due to the locking cams blocked. In this context, it is advisable to place the locking cams almost in the edge of the socket pot to run out, so that any accidental insertion, even just over a certain depth, can be excluded.

For the sake of simplicity, a flat plug that can be inserted into the socket 1 in parallel and at the same time has been omitted in the right half of the socket 1 to facilitate the illustration of the insertion openings and the contact sockets 15 or 16 underneath. As can be seen, this socket is also suitable for the egg. set further plugs of protection class II, in particular the contour plugs according to DIN 4 9 406 in the form F and R or flat plugs according to DIN 49 464 in the form R. The dimensions of the locking cams 3 and 3 ¹ are particularly important with regard to to design the plug body of the contour plug so that a complementary engagement of the locking cams with the corresponding recesses in the plug body takes place.

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In the examples according to FIGS. 2 to 4 , three alternatives of different connection possibilities are th of the contact socket uar-jesr.eiLc provided in the socket 1 overall. It is essential that the central contact sockets untc-f the insertion openings 8 and J -and the vercikal üuyoorciaocor. Contact sockets of the insertion openings 11 and 12 or 11 and different polarity or different potential obtained. In the example according to FIG. 2, the Kor.cakt sockets of the corresponding insertion openings 11, 11 and 9 are therefore electrically connected to one another. The second contact bridge runs over the contact sockets of the Einf ührungsöffnumjen 8, 12 and 12 ^r .

3 shows a diagonal connection, the insertion openings 11, 12 'and 9 via the electrical connection 23 and the insertion openings 8 , 12 and 11' via the bridging electrical connection 24 being at the same potential.

As a further embodiment, FIG. 4 shows an electrical connection 26 between the insertion openings 11, 8 and 12 '. The electrical connection 25 of different polarity is for the insertion openings 9, 11 ^; and 12 manufactured.

Claims (8)

i ι .r: - ι N&L Elektrotechnik GmbH Lessinastraße (S D-8757 Karlstein 1 socket claims 1. Electrical socket for alternative use of different Plugs, especially two-pole plugs of protection class II, their socket pot the DIN 49 440 corresponding identification cams and two central openings for plug pins on the has the axis of symmetry (horizontal axis) connecting the cam cams, and on both sides to the horizontal axis and the central insertion openings each have an insertion opening for receiving one of the connector pins of a connector UERGSTRASSE 48 ¹ Ii D-BO35 MIJNCHCN-GAUTINÜ TELEPHON: (ObO) U & O3O3O TELEX: QSI 777 ikiu ii according to DIN 4 9 4 64 (flat plug of the form F) with 90 ° against · - "'" the horizontal axis provided connecting line of the connector pins of the connector DIN 49 464 is arranged, characterized in that instead of the one in the vertical axis (V) Socket according to DIN 49 440 provided two earthing contact spring contacts a total of at least one locking cam (3.3 ') in the area of the vertical axis (V) -so - is dimensioned and arranged that a plug according to DIN 4 9 406 (contour plug) or alternatively one or two parallel plugs (10) according to DIN 49 464 (flat plug form F) can be used approximately parallel to the vertical axis (V), whereby at least the insertion of a protective contact plug according to DIN 49 441 can be blocked ^{by the locking cam or cams (3, 3 1)} . 2. Socket according to claim 1, ^{characterized in that two locking cams (3, 3 1} ) provided point-symmetrically to the point of intersection (S) of the horizontal axis (H) with the vertical axis (V) are arranged in the area of the vertical axis (V). 3. Socket according to claim 1 or 2,
characterized in that two opposing locking cams (3, 3 ¹ ) symmetrical to the vertical axis (V) are provided. 4. Socket according to one of claims 1 to 3, characterized in that the one or more locking cams (3, 3 ¹ ) in plan view of the socket pot (2) essentially the contour of a square or a square beveled at the corner areas oriented towards the center point, in particular an elongated square. 5. Socket according to one of claims 1 to 4, characterized g e k ο η η ζ calibration η ο t, that the central Iiinf ührungsöf fnungen (8, 9) for a contour plug on the horizontal axis (II) with respect to the vertical connecting lines (13 ) two insertion openings (11, 12; 11 ', 12') assigned to a flat plug (19) are arranged offset radially outward. 6. Socket according to one of claims 1 to 5, characterized in that that the electrical circuit of the insertion openings (8, 9, 11, 11 ', 12, 12') assigned to the contact sockets (15, 16) is made so that the central contact sockets (16) one below the other and those opposite one another in the vertical direction Contact sockets (15) for the pins of a flat plug (10) are always different from one another Potential. 7. Socket according to one of claims 1 to 6, characterized in that that the locking cams (3, 3 ') are an integral part of the socket (1), in particular in one piece with the socket pot (2) are formed, or can be fixed rigidly in the socket pot (2). 8. Use of a socket according to one of claims 1 to 7 as a stationary or mobile socket, in particular in Combination to a safety socket according to DIN 4 9 as a multiple socket, as an adapter, adapter or plug-in device with molded plug part or an electrical cable. COPY