DE29508095U1 - Modular connector system - Google Patents

Description

HTS-Elektrotechnik GmbH

Ohlenhohnstrasse 53819 Neunkirchen

» I

·

Ne/Bl (0788) P94576DE00

Modular connector system

Description

The invention relates to module insertion frames for receiving contact modules for insertion into connector housings, with a frame body made of two cheek parts and two head pieces, which are each parallel to one another and form a receiving opening for the contact modules, with holding means on the cheek parts, by which the contact modules are fixed and held, with guide means on the head pieces, which on the one hand comprise a positive/male guide element and on the other hand a negative/female guide element, and with protective contact means which are formed on the head pieces. The invention further relates to contact modules with at least one pin contact or at least one socket contact for insertion into such module insertion frames. The invention further relates to a connector combination, which comprises two housings, one of which accommodates a module insertion frame with at least one pin contact module and the other a module insertion frame with at least one socket contact module.

Connector housings with die-cast module insertion frames and with contact modules of the type mentioned inserted therein are known in different designs. In this case, one of the connector housings, usually the housing for accommodating a module insertion frame for socket contact modules, is used for fastening to a control cabinet wall or to a machine housing, to which it is firmly screwed, while the second connector housing, i.e. the one for accommodating a module insertion frame for pin contact modules, can be freely connected to it.

can be inserted and can be used to connect a measuring or testing device via a cable if required or to establish a permanent connection to an external control or regulating unit. The insertion frames used usually differ in terms of various design components. Firstly, these are the holding means adapted to the respective plug-in contact modules/ which are individually designed for the two different types of plug-in contact modules; secondly, the two insertion frames differ from one another in terms of their mutual engagement. Finally, the protective contact elements on the two insertion frames are designed in pairs as screw-on tabs at both ends.

Based on this, the object of the present invention is to provide insertion frames and contact modules that have a simplified structure and with which the number of parts and designs to be kept in stock can be reduced while allowing for variable adaptation to the practical application.

The solution consists of module insertion frames, which are characterized in that the protective contact means are formed by one of the guide elements itself, which is connected in one piece to the frame body, and a single protective contact spring, which is attached to the other of the guide elements. With the design of such module insertion frames, it is possible to standardize the previously different frame types, regardless of how many different frame sizes are considered necessary. This results in logistical advantages with regard to delivery and storage, but above all the main advantage for the manufacturer of only having to produce one mold for module insertion frames for each connector combination. By limiting the assembly to just one protective contact spring, the assembly time is also reduced.

for the frames. The frames are screwed into the respective connector housings in the usual way.

The combined protective contact and guide means, which are designed "on the fold" on the frame body, have rib parts on one head piece and a block element with a slot on the other head piece, which mutually engage with one another when a plug connection is made between two housings, i.e. the rib part on one frame engages in the slot of the block element on the other frame and vice versa. The protective contact means comprise a single contact spring element, which comes into conductive contact with the other frame when a plug connection is made between two housings. In particular, this contact spring element is U-shaped with legs pointing in the direction of the plug connection and is fixed with a cross leg in a bottom recess of the above-mentioned slot. The legs of the contact spring element are curved in such a way that when a plug connection is made between two housings, these legs are clamped between the walls of the slot and the flanks of the rib parts of the module insertion frame.

In an advantageous embodiment, it is provided that the holding means for securing plug contact modules and socket contact modules are identical to one another, i.e. these holding means are completely identical both in terms of their distance from one another and in their position relative to the respective plug connection levels, so that the frame construction becomes correspondingly simpler and less complicated. The idea addressed here of course requires a corresponding design of the contact modules provided for the module insertion frames. Preferably the holding means in the frame and the corresponding means on the contact modules are differentiated in such a way that only one single clear relative insertion position between the frames

and the modules is possible by the holding means, which are located opposite each other in pairs, differing from each other.

In a further embodiment, a plurality of pairs of opposing holding means are designed to fix one plug contact module each along the extension of the frame. In this way, plug contact modules can be used that only take up part of the length of the frame, so that a plurality of plug contact modules can be inserted into one frame. This enables the frames to be equipped with plug contact modules in a variety of ways. This makes it possible to create a plug connection with an individual combination of different contact modules. If only a small number of connection contacts are required, a subset of contact modules can be inserted into a larger frame to reduce the cost. This further reduces the requirements for storage and logistics, and in particular with regard to the variety of tools.

In a favorable design, the receiving openings from the cable connection side in the plug connection direction are designed without undercuts. This enables the plug contact modules to be installed from the cable connection side into the frames, with the option of wiring the individual plug contact modules outside the frames and then being inserted into the frames from the cable connection side and secured in them.

In a further embodiment, the holding means for securing the contact modules comprise guide pockets in the cheeks. This eliminates the need for stop and flange surfaces within the receiving opening, so that the design of the frame is significantly simplified. In a preferred embodiment, windows are formed in the middle of the guide pockets, which are closed by outer webs running transversely to the plug connection direction.

Furthermore, the holding means for securing the contact modules preferably comprise stop edges on the plug connection side.

In adaptation to this design, the pin contact modules and the socket contact modules are designed identically to one another in the area of a frame insertion section and preferably comprise elastic elements there for establishing snap-in connections with the frames. It is a significant advantage that this eliminates the need for any screw connections between the module insertion frame and the contact modules.

In adaptation to the aforementioned design of the frames, the contact modules are provided with pairs of opposing guide bases for engaging in the guide pockets of the frames. In addition, elastic tongues are arranged on the guide bases, which are hinged on one side and are provided with locking means that can engage in holding means on the frame. These locking means are designed in particular in the form of transverse grooves on the elastic tongues, which can lock into the window webs of the frames that are opposite the aforementioned stop edges. By pressing down the free ends of these tongues, the locking mechanisms can be released again and the contact modules can be pulled out of the frame towards the cable connection side.

In a particularly advantageous embodiment of the contact modules according to the invention, it is provided that the elastic tongues are hinged on the plug connection side of the frame insertion sections so that their free ends point towards the cable connection side, whereby the contact module can be inserted into a module insertion frame from this cable connection side. It is also particularly advantageous to design the contact modules in such a way that the tongues only engage in the frames on the inside and do not enclose them on the outside.

so that the tongues are largely protected against damage and cannot get caught or broken when the contact modules are inserted into the frame.

A connector combination according to the invention is characterized in that the module insertion frames in both connector housing parts are designed identically to one another and each have identical means for securing plug contact modules as well as socket contact modules, that the pin contact modules and the socket contact modules comprise frame insertion sections that are designed identically to one another, and that combined protective contact and guide means are designed to be complementary to one another, i.e. positive/male on the one hand and negative/female on the other, each with a single protective contact element, so that two module insertion frames can be connected to one another in a plug-in connection.

The connector housings have mutually complementary locking means. Such locking means are to be arranged in such a way that they comprise, for example, locking brackets on one housing and corresponding locking pins on the other housing, so that when two connector housings are brought together, the locking brackets of one housing engage behind the locking pins of the other housing.

At least one of the housings must be provided with suitable sealing means at the connecting openings. When plugged into one another, the housings should interlock in such a way that they can absorb transverse forces relative to the direction of the plug connection and thus keep the contact modules free from such forces.

Locking brackets and pins of this type are known and are described, for example, in EP 0 405 168.

Preferred embodiments are shown in the drawings. Here, in detail,

Fig. 1 a module insertion frame in side view with the plug connection side on top;

Fig. 2 shows a module insertion frame according to Fig. 1 in plan view of the plug connection side;

Fig. 3 shows a module insertion frame according to Fig. 1 in vertical section along the longitudinal center plane;

Fig. 4 shows a module insertion frame according to Fig. 1 in a plan view of the cable connection side with a partial section according to the section line from Fig. 3;

Fig. 5 shows a module insertion frame according to Fig. 1 in a representation similar to Fig. 3 with a vertical partial section along the longitudinal center plane;

Fig. 6 shows a module insertion frame according to Fig. 1 in a vertical cross section through the end section shown in Fig. 5;

Fig. 7 shows a module insertion frame according to Fig. 1 in a representation similar to Fig. 1 with a vertical partial section through the longitudinal center plane;

Fig. 8 shows a module insertion frame according to Fig. 1 in a vertical cross section through the end section shown in Fig. 7;

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Fig. 9 the module insertion frames according to the representations in Figures 5 and 7 in the position assigned to one another as if the plug connection had been made;

Fig. 10 the module insertion frames according to the illustrations in Figures 6 and 8 in a position associated with one another as when the plug connection has been established;

Fig. 11 shows a module insertion frame as shown in Fig. 5 in a shortened version;

Fig. 12 shows the module insertion frame according to Fig. 11 in a vertical cross section through the end section shown in Fig. 11;

Fig. 13 shows a module insertion frame as shown in Fig. 7 in a shortened version according to Fig. 11;

Fig. 14 shows the module insertion frame according to Fig. 13 in a vertical cross section through the end section shown in Fig. 13;

Fig. 15 shows a module insertion frame in a representation as in Fig. 5 in a further shortened version;

Fig. 16 the module insertion frame according to Fig. 15 in a vertical cross section through the end section shown in Fig. 15;

Fig. 17 shows a module insertion frame as shown in Fig. 7 in a further shortened version according to Fig. 15;

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Fig. 18 shows the module insertion frame according to Fig. 17 in a vertical cross section through the end section shown in Fig. 17;

Fig. 19 shows a module insertion frame in a representation as in Fig. 5 in a further shortened version;

Fig. 20 shows the module insertion frame according to Fig. 15 in a vertical cross section through the end section shown in Fig. 15;

Fig. 21 shows a module insertion frame as shown in Fig. 7 in a further shortened version according to Fig. 19;

Fig. 22 the module insertion frame according to Fig. 21 in a vertical cross-section through the end section shown in Fig. 21?

Fig. 23 a pin contact module with power and switching contacts for solder connection

a) in vertical section

b) in side view

c) View of the connector side

d) in view of the cable connection side;

Fig. 24 a socket contact module with power and switching contacts for solder connection

a) in vertical section

b) in side view

c) View of the connector side

d) in view of the cable connection side;

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Fig. 25 a multi-contact module housing for 15 pin contacts

a) in vertical section

b) in side view

c) View of the connector side

d) in view of the cable connection side;

Fig. 26 a multi-contact module housing for 15 socket contacts

a) in vertical section

b) in side view

c) View of the connector side

d) in view of the cable connection side;

Fig. 27 a pin contact insert with clamp connection

a) in vertical section

b) in side view

c) View of the connector side

d) in view of the cable connection side;

Fig. 28 Pin contact modules in various designs in view of the plug contact side

a) with one power plug contact and two switching plug contacts

b) with two power plug contacts and two switching plug contacts

c) with six plug contacts

d) with eight plug contacts

(e) with fifteen plug contacts;

Fig. 29 Module insertion frame with inserted contact modules in vertical section

a) a module with pin contact insert

b) a module with socket contact insert

c) the modules according to a) and b) with the plug connection established;

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Fig. 30 a connector housing combination of lower part and plug part, each with an inserted module insertion frame without modules

a) in longitudinal section in the direction of the plug connection

b) in cross-section in the direction of the plug connection.

Figures 1 to 4 are described together below. They show the type of uniform module insertion frame 1, on which a rectangular receiving opening 3 can be seen between two cheek parts 4, 5 and two head pieces 6, 7. A plug connection side 8 and a cable connection side 9 are identified on the frame 1. First and second guide elements 10, 11 directed towards the plug connection side and aligned in the direction of the plug connection axis A can be seen on the head pieces 5, 7. The guide element 10 has the shape of a rib with a first slightly wider and shorter rib part 12 and a narrower rib part 13 with a greater length and a resulting cam projection 14. The guide element 11 is essentially designed in the form of a column with a T-shaped cross section, which has a central slot 15. This slot has a first narrower section 16 that opens outwards and a section 17 that is wider than the first and is designed with a base recess 18 in which a central rivet 19 is formed as one piece. The guide element 10 and the slot 15 in the guide element 11 are each designed symmetrically to the longitudinal center plane B and are arranged approximately symmetrically to the longitudinal center plane C relative to one another. The shape of the slot 15 is complementary to the shape of the rib-shaped guide element 10; the height of the cam projection 14 corresponds to the depth of the base recess 18 of the slot section 17.

Clamping screws 21, 2 2 with spring washers 23, 24 underneath are inserted into the head pieces 6, 7. These are used for clamping

of protective contact conductors. Furthermore, through-holes 25, 26, 27, 28 are provided in the head pieces 6, 7 for fastening the frame in a connector housing. Four openings in the form of rectangular windows 29, 30, 31, 32, 33, 34, 35, 36 are provided in each of the cheek parts 4, 5. Guide pockets 37, 38, 39, 40, 41, 42, 43, 44 are provided around these windows on the inside of the cheeks. The window webs 45, 46 on the cable connection side have the same material thickness as the cheeks in the area of the guide pockets 37, 38, 39, 40, 41, 42, 43, 44; the window webs 47, 48 on the plug connection side are limited by stop edges 49, 50, which close off the guide pockets 37, 38, 39, 40, 41, 42, 43, 44 on one side. Of two guide pockets 37/41, 38/42, 39/43, 40/44 located opposite one another in the cheek parts 4, 5, one is wider than the other, so that correspondingly designed contact modules can only be used with a certain, unambiguous orientation.

Figures 5 to 10 are described together below. In Figures 5 and 9, a first module insertion frame 1 is shown in the position as the frame in Figure 3, but only in partial section; in Figures 7 and 9, a second module insertion frame 2 is shown in the position as the frame in Figure 1, but in partial section. The frames 1, 2 are shown in relation to one another in positions rotated by 180° about an axis perpendicular to the cutting plane. In Figure 9, the frames 1, 2 according to Figures 5 and 7 are shown in an associated, interlocking position, as occurs when a plug connection is made between connector housings not shown here. The essential details are designated with the same reference numbers as known from Figures 1 to 4 and have the same meaning. The details are designated with the index 1 for frame 1 and with the index 2 for frame 2.

In the sectional view on the left side of Figure 9 it can be seen how the rib-shaped guide element 1O ₁ of the frame

1 engages in the slot 15 ₂ of the guide element H ₂ of the frame 2. Accordingly, it is at least vaguely recognizable that the rib-shaped guide body 10 ₂ of the frame 2 engages in the non-recognizable slot of the guide body H ₁ of the frame 1.

In the sectional views 6, 8 and 10 associated with Figures 5, 7 and 9, the rib-shaped form of the guide element 10 ₁ in Figure 6 can be seen again in detail, as well as the slot shape of constant width of the slot 15 ₂ in the guide element H ₂ in Figure 8. As a further detail, a U-shaped protective contact spring _{20 2} can be seen in Figures 8 and 10, which is fastened with the rivet body 19 ₂ in the bottom recess 18 ₂ of the slot 15 _2. The spring 20 provides a conductive protective contact between the two module insertion frames 1,

2. Since the frames are metallically conductive, only one protective contact conductor needs to be connected to one of the terminal screws 22, 23.

In the illustrations, play is provided on all sides between the interlocking guide elements 10, 11. The guide elements 10, 11 are used for the first mutual insertion when establishing a plug connection between two connector housings. Transverse forces - related to the plug connection axis A - between the connector housings are absorbed by the direct contact of the two connector housings themselves when the plug connection is in place.

Figures 11 to 22 are described together below. The representation of the module insertion frames 1, 2 in Figures 11 to 14, 15 to 18 and 19 to 22 corresponds to the representation in Figures 5 to 8 with regard to the details shown.

Other corresponding details are designated with the same reference numbers. The recognizable differences are that, in contrast to the frames from Figures 5 to 8, which have four pairs of windows in the cheek parts 4, 5, here the number of pairs of windows is reduced, namely to three pairs in Figures 11 to 14, to two pairs in Figures 15 to 18 and to one pair in Figures 19 to 22. Since the size of the windows and their distance from each other and from the head pieces remains unchanged, the overall length of the frames is reduced in each case.

Figures 23 to 29 are described together below. Figures 23, 25, 27 and 29 show pin contact modules 51 in various designs; Figures 24, 26 and 28 show socket contact modules 52 in designs which are designed for plug-in connection with the pin contact modules 51 according to Figures 23, 25 and 27. The pin contact modules 51 have a cable connection part 53, a middle housing insert part 54 and a front plug connection part 55 lying one behind the other in the direction of the plug connection axis A. The socket contact insert 52 has a cable connection section 56, a frame insertion section 57 and a plug connection section 58 lying one behind the other in the direction of the plug connection axis. The outer contour of the cable connection sections 53, 56 on both the pin contact modules 51 and the socket contact modules 52 in Figures 23 and 24 correspond to one another, although this is not essential to the function. In Figures 25 to 29, a cable connection section is not particularly pronounced.

The external contours and the structural details of the frame insertion sections 54, 57 on the pin contact modules 51 on the one hand and on the socket contact modules 52 on the other hand are completely identical. This enables the combination

of both module types as desired with the uniform module insertion frame according to the invention. The plug connection sections 55 on the pin contact modules 51 and the plug connection sections 58 on the socket contact modules 52 are essentially designed to complement one another, so that they engage with one another when a plug connection is made between two plug connector housings. On the pin contact modules 51, the plug connection sections 55 are designed in the shape of a frame, so that they immediately surround the block-shaped plug connection sections 58 of the socket contact modules 52 on the outside in order to extend the creepage distances.

On opposite side surfaces of the frame insertion sections 54, 57, guide bases 59, 60, 61, 62 are attached on both sides, which are essentially rectangular and which, when a contact module is inserted into a module insertion frame in the direction of the plug connection axis, fit with their outer contour into pairs of opposing guide pockets 37/41, 38/42, 39/43, 40/44 in the cheek parts of the frames, with the stop edges 49, 50 forming an end stop which fixes the position of the contact modules within the frames. Of the opposing guide bases 59, 60, 61, 62, one is wider than the other, so that the contact modules can only be inserted into the frames with a certain, clear orientation. In the middle of the guide bases 59, 60, 61, 62, individual spring tongues 63, 64, 67, 68 are formed, which are hinged on one side and extend from the edges pointing to the stop edges 49, 50 and at the free ends of which a transverse groove 65, 66, 69, 70 is formed. The width of the tongues 63, 64, 67, 68 is less than the width of the windows 29, 30, 31, 32, 33, 34, 35, 36 in the cheek parts of the frames. When a contact module is inserted into a frame in the direction of the plug connection axis, the guide bases 59, 60, 61, 62 snap into place on the stop edges 49, 50.

opposite window webs 45, 46 into the transverse grooves 65, 66, 69, 70 of the tongues 63, 64, 67, 68. The plug contact modules can be released from the frames by deliberately pressing down the two opposite tongues 63, 64, 67, 68 by exerting pressure on the free ends of the tongues. The inserted plug contact modules 51, 52 are secured in the frames against any movement, so that plug connections can be made between two connector housings with inserted module insertion frames with plug contact modules or sets of plug contact modules that are matched to one another.

The design of the pin contact elements 73 or socket contact elements 78 within the contact modules is known in principle. For each contact element, a through opening 71, 76 must be provided from the connection side to the plug connection side. The contact elements 73, 7 8 are locked into the elastic plastic material of the contact modules 51, 52 by means of the engagement of an inner collar 72, 7 7 in an annular groove 74, 7 9.

In Figure 23, a cable connection socket 7 5 can be seen on the rear of two power pin contact elements 7 3. In addition to the power pin contact elements 73, two switching contact elements 85 of essentially the same design and fastening are shown. However, they are shorter relative to the corresponding socket contact element, so that they are interrupted before the power contact elements when a plug connection is disconnected. This controls a power contactor that interrupts the power supply to the power contact elements.

In Figure 24, a cable connection socket 80 is provided on the rear of two spring-elastic power socket contact elements 76. In addition to the two power socket contact elements 76, two switch socket contact elements 86 of essentially the same design and fastening are provided, which are connected to the

The previously mentioned switching pin contact elements 85 from Figure 23 interact in the manner already described.

In Figure 25, only the basic housing of a multi-pin contact module 51 is shown. The through-opening 71 for inserting the contact pins is provided with insulating collars 99 alternately in a diagonal grid on the plug connection side.

Figure 26 shows a housing of a multi-contact socket module 52, in which the through-openings 7 6 for the contact sockets on the plug connection side are provided in a diagonal grid with countersinks 100 for the previously mentioned insulating collars 99 from Figure 25.

Figure 27 shows pin contact elements 84 which have spring contact connections. Tools can be inserted through the cable connection-side assembly openings 81, which deform the spring clamps 82 in such a way that a cable end can be inserted into a connection opening 83 and the cable end is clamped when the spring clamp 82 is relieved. The contact elements 84 are attached in a suitable manner in the contact insert 51. Here, six contacts are combined in one contact insert.

Figure 28 shows that the shape and number of electrical contact elements (in this case pin contacts) within a plug-in contact module can be varied in many ways, with the electrical load capacity decreasing with the size. From a) to e) variations are shown one after the other: a) with one power contact for 100 A and two switching contacts, b) with two power contacts for 63 A each and two switching contacts, c) with six contacts for 40 A each, d) with eight contacts for 16 A each and e) with fifteen contacts for 10 A maximum load each. The scale is 1:1.

In Figure 29a) it is clear in vertical section how a pin contact module 51 is inserted into a first module insertion frame 1 and in Figure 29b) how a socket contact module 52 is inserted into a second module insertion frame 2. For details, reference is made to the terms from the description of Figures 23 to 27; identical details are designated here with the same reference numbers. It is clear how the lower edges of the bases each rest on the stop edges and the grooves of the tongues each snap into the upper window webs of the frames. In this way, a plug connection can be made as shown in Figure 29c). The frame-shaped plug connection section of the pin contact module 51 encompasses the block-shaped plug connection section of the socket contact module 52 in such a way that the effective creepage distances are extended. As already shown and described previously, the module insertion frames 1, 2 are electrically connected to one another at least via the protective contact springs 20.

In Figure 30, a connector housing plug part 101 and a connector housing lower part 102 are shown in a mutually assigned position when the plug connection has been made. A rubber seal 103 seals the housing openings lying on top of one another to the outside. In the connector part 101, there is necessarily a cable feedthrough to the outside, which cannot be seen in the sections shown (Figure 30a: longitudinal section; Figure 30b): cross section). A first module insertion frame 1 is inserted into the connector part 101 and screwed to it. A second module insertion frame 2 is inserted into the connector lower part 102 and screwed in. The two frames 1, 2 assume the relative position to one another already shown and explained in Figures 9 and 10.

In this illustration, no contact modules are inserted into the frames. However, it is easy to understand that the

To create a complete plug connection, the contact modules to be inserted into the frame will assume the relative position to one another as shown in Figure 29c.

HTS-Elektrotechnik GmbH Ohlenhohnstrasse 53819 Neunkirchen

16 May 1995 Ne/Bl (0788) P94576DE00

Modular connector system

List of reference symbols

1 Module insert frame 2 Module insertion frame 3 Receiving opening 4 Cheek part 5 Cheek part 6 Headpiece 7 Headpiece 8th Connector side 9 Cable connection side 10 Guide element 11 Guide element 12 Rib part 13 Rib part 14 cam 15 slot 16 Slot section 17 Slot section 18 Soil depression 19 rivet 20 Contact spring 21 screw 22 screw 23 Spring washer 24 Spring washer 25 Through hole 26 Through hole 27 Through hole

28 through hole

29 windows

30 windows

31 windows

32 windows

33 windows

34 windows

35 windows

36 windows

37 Guide pocket

38 Guide pocket

39 Guide pocket

40 Guide pocket

41 Guide pocket

42 Guide pocket

43 Guide pocket

44 Guide pocket

45 Window bridge

46 Window bridge

47 Window bridge

48 Window bridge

49 Stop edge

50 stop edge

51 Pin contact module

5 2 socket contact module

5 3 Cable connection section

54 Frame insertion section

55 Plug connection section

56 Cable connection section

57 Frame insertion section

58 Connector section

59 Guide base

60 Guide base

61 Guide base

62 Guide base 63 Tongue 64 Tongue 65 Cross groove 66 Cross groove 67 Tongue 68 Tongue 69 Cross groove 70 Cross groove 71 Passage opening 72 Inner waistband 73 Pin contact element 74 Ring groove 75 Cable connection socket 76 Passage opening 77 Inner waistband 78 Socket contact element 79 Ring groove 80 Cable connection socket 81 Mounting opening 82 Spring clamp 83 Connection opening 84 Contact pin 85 Pin contact element 86 Socket contact element

99 protective collar

100 countersinks

101 Connector housing/plug part

102 Connector housing/base

103 Seal

Claims (1)

1. Module insertion frame (1, 2) for holding contact modules for insertion into connector housings - with a frame body made up of two cheek parts (4, 5) and two head pieces (8, 9), which are each parallel to each other and form a receiving opening (3) for the contact modules, - with holding means on the cheek parts (4, 5) by which the contact modules are fixed and held, - with guide means on the head pieces (8, 9), which on the one hand comprise a positive/male guide element (10) and on the other hand a negative/female guide element (11), and with protective contact means which are formed on the head pieces (8, 9), characterized, that the protective contact means by - one of the guide elements (10, 11) itself, which is integrally connected to the frame body, and - a single protective contact spring (20) attached to the other of the guide elements (11, 10), be formed. 2. Frame according to claim 1, characterized, that the positive/male guide element (10) and the negative/female guide element (11) are complementary to each other, so that a plug connection with effective protective contact can be formed between two housings with a pair of identical frames (1, 2). 3. Frame according to claim 1 or 2,
characterized, that a plurality of holding means arranged in pairs for fixing a contact module each are arranged along the extension of the cheeks (4, 5). 4. Frame according to one of claims 1 to 3,
characterized, that the holding means for securing pin contact modules (51) and socket contact modules (52) are identical to one another. 5. Frame according to one of claims 1 to 4,
characterized, that the holding means for securing the contact modules comprise guide pockets (37 - 44) in the cheeks (4, 5). 6. Frame according to one of claims 1 to 5,
characterized, that windows (29 36) are formed centrally in the guide pockets (37 - 44), which are delimited by transversely running outer webs (45, 46, 47, 48). 7. Frame according to claim 5,
characterized, that the holding means for securing the contact modules comprise stop edges (49, 50) located on a first side of the frame body - the plug connection side (8). 8. Frame according to one of claims 1 to 7, characterized in that the first guide element (10) comprises rib parts (12, 13) and the second guide element (11) comprises a block element with a slot (15), which mutually engage with one another when a plug connection is made between two housings with a pair of identical frames (1, 2). 9. Frame according to one of claims 1 to 8, characterized in that the rib parts (12, 13) are T-shaped in cross-section and the slot (15) is laterally open in cross-section. 10. Frame according to one of claims 1 to 9, characterized in that the protective contact spring element (20) is U-shaped and runs with its legs in the longitudinal direction of the slot (15) and is fixed with its transverse leg in a bottom recess (18) of the slot (15). 11. Frame according to one of claims 1 to 10,
characterized , that the legs of the protective contact spring element (20) are curved and, when a plug connection is made between two housings, are clamped between the walls of the slot (15) and the flanks of the rib parts (12, 13) with a pair of identical frames (1, 2). 12. Frame according to one of claims 1 to 11,
characterized, that the head pieces (10, 11) have screwing means (25 - 28) for connection to a connector housing (101, 102). 13. Frame according to one of claims 1 to 12,
characterized, that the cheek parts (4, 5) each have means for securing a plurality of contact modules and the length of the receiving openings (3) of the module insertion frames (1, 2) corresponds to a multiple of the width of the individual contact modules (51, 52). 14. Contact module (51, 52) with at least one pin contact or at least one socket contact for module insertion frame (1, 2) according to one of claims 1 to 13, characterized, that a frame insertion section (54, 57) with elastic elements is provided for producing locking connections with a module insertion frame (1, 2). 15. Contact module according to claim 14,
characterized, that a pin contact module (51) and a socket contact module (52) comprise frame insertion sections (54, 57) that are identical to one another. 1β. Contact module according to one of claims 14 or 15,
characterized, that on the frame insertion sections (54, 57) opposite guide bases (59 - 62) are formed in pairs for engagement in guide pockets of the module insertion frames (1, 2). 17. Contact module according to claim 16,
characterized, that elastic tongues (63, 64, 67, 68) are arranged on the guide sock In (59 - 62) and are hinged on one side in the direction of the plug connection and are provided with locking means which can engage in holding means on the cheek parts (4, 5) of module insertion frames (1, 2). 18. Contact module according to claim 17,
characterized, that transverse grooves (65, 66, 69, 70) are formed in the elastic tongues (63, 64, 67, 68) into which the window webs of the cheek parts (4, 5) of the module insertion frames (1, 2) can snap into place. 19. Contact module according to one of claims 14 to 18,
characterized, that the elastic tongues (63, 64) 67, 68) are hinged on the plug connection side of the frame insertion sections (54, 57) so that their free ends point towards the cable connection side wherein the contact module (51, 52) can be inserted from this cable connection side into a module insertion frame (1, 2). 20. Connector combination comprising two housings (101, 102), one of which accommodates a module insertion frame (1) with at least one pin contact module (51) and the other a module insertion frame (2) with at least one socket contact module (52) , characterized, that the module insertion frames (1, 2) are designed according to one of claims 1 to 13 and the contact modules (51, 52, 53) are designed according to one of claims 14 to 19.