Marker support for an electrical connection assembly

Abstract

A marking carrier (20) for an electrical connection arrangement (10) comprises a marking drum (21) on whose outer surface (22) at least two markings (25) are applied in the circumferential direction, wherein at least one locking recess (27) is provided on the outer surface (22) at at least one free end of the marking drum (21). Furthermore, a positioning recess (24) is provided in a base surface (23) of the marking drum (21) near the locking recess (27).The marking carrier can be positioned in a connection arrangement (10) in a receiving space (19) with a viewing opening (18), wherein the receiving space (19) has at least one locking lug (127) at the mouth of the receiving space (19), which is complementary to the at least one locking recess (27) of the marking drum (21) of the marking carrier (20), wherein the sum of the number of locking lugs (127) and locking recesses (27) is at least three, so that the marking drum (21) can be rotated and positioned in at least two locking positions for displaying a connection marking in the viewing opening (18).

Description

TECHNICAL FIELD

[0001] The present invention relates to a marking carrier for an electrical connection arrangement. The connection arrangement can be an electrical device such as a DIN rail-mounted device or an auxiliary contact element. STATE OF THE ART

[0002] Section L.3.2 of the EN 60947-1 standard describes how the terminals of auxiliary contact elements are to be marked. These are to be marked with two-digit numbers, with the units digit being a function digit and the tens digit being a sequence digit.

[0003] In order to implement standard-compliant connection marking in a modular switch concept that allows different combinations of normally closed and normally closed contacts in modules, the following variants have been developed so far: The switch manufacturer marks the connections directly on the contact switch housing, e.g., by printing. This requires the manufacturer to produce numerous print variants and to maintain variants. Catalog creation is a significant effort, and many item numbers must be managed. Customers also incur considerable effort for project-specific ordering and assembly. This results in limited flexibility in the event of changes to the project, and extensive inventory buildup is required by both the manufacturer and the customer. "Neutral" contact switches and separate individual parts (signs, stickers, etc.) are available for connection identification. This allows the manufacturer and the customer to reduce the number of variants and inventory for the actual contact switch. However, the customer faces significant assembly work to attach the relatively small individual parts for each contact section; this is better achieved by gluing, clipping, etc.Alternatively, the manufacturer may incur additional costs if preconfigured modules labeled in accordance with standards are delivered.

[0004] A subsequent change of the labeling is even more complex and there may be additional costs for labeling the individual parts at the customer's site if the manufacturer only supplies empty parts.

[0005] In DE 20 2010 121 833 A1 or EP 4 066 322 A1, marking plates are welded to a housing of the connection arrangement in order to create a material-tight connection.

[0006] DE 10 2019 108 298 A1 relates to a method for marking electrical devices arranged in series on a mounting rail using a laser head. Such mounting rails are used for snapping on terminal blocks in installation technology. These terminal blocks each have a plurality of connections. To facilitate wiring of the arrangement within the control box, the individual terminal blocks and their connections can be marked by providing corresponding marking surfaces.

[0007] EP 3 298 605 A1 describes label strips for a row of adjacent electrical terminals. Such label strips are used to label electrical terminals with an identifier that can provide any information relating to the associated terminal, such as electrical connection information. The label strips are releasably attached to an associated terminal block of the respective terminal, for example, by clipping. To avoid having to handle each label individually, label strips have been proposed in which label strips are arranged in a row next to each other and connected via connectors. This document improves their use.

[0008] EP 0 011 133 B1 discloses a switch arrangement with switch contacts that can be configured as either normally closed or normally open contacts. There is no provision for marking the selected setting.

[0009] DE 20 2005 001 637 U1 provides a label, in particular a terminal label for switching devices or the like, in which an attachable plate is provided which can be inscribed on both sides.

[0010] DE 22 50 241 C3 shows a switch arrangement with connection designations for the terminals, in which, for example, numbers in a window become visible - or not - depending on a contrasting background of the window. PRESENTATION OF THE INVENTION

[0011] Based on this state of the art, the invention is based on the object of reducing the variety of variants and the storage costs for manufacturers and customers and advantageously also reducing the time required for production / modification of switch modules with standard-compliant marking.

[0012] A marking carrier for an electrical connection arrangement according to the invention is characterized by the features of claim 1.

[0013] This marker carrier is particularly suitable for contact switches with normally closed and / or normally open contact paths, each with two terminals. It can be installed multiple times on modules for use on a manually operated switching device, in short, on an electrical connection arrangement.

[0014] The marking carrier is characterized in that it has a marking drum, on whose outer surface at least two markings are applied in the circumferential direction, wherein at least one locking recess is provided on the outer surface at at least one free end of the marking drum and that a positioning recess is provided in a base surface of the marking drum close to the locking recess. The term drum is understood to mean a cylindrical, rotatable element. According to the general definition, the cylinder shape is a geometric body in which two parallel, flat, congruent base surfaces are connected to one another by a shell. This shell does not have to be regularly shaped, but its cross-section can deviate from the said congruent base surfaces.

[0015] The invention also relates to a connection arrangement with at least one marking carrier according to claim 1, which is characterized in that the connection arrangement has a receiving space with a viewing opening for the marking carrier which can be rotatably inserted into the connection arrangement, wherein the receiving space has at least one locking lug at the mouth of the receiving space, which is complementary to the at least one locking recess of the marking drum of the marking carrier, wherein the sum of the number of locking lugs and locking recesses is at least three, so that the marking drum can be rotated into at least two locking positions for displaying a connection marking in the viewing opening. In particular, the display can serve to display the respective standard-compliant connection marking.

[0016] In an advantageous marking carrier, a number of locking recesses is provided that corresponds to the number of markings. The markings are arranged at regular angular intervals (180 degrees, 120 degrees, 90 degrees for two, three, or four markings, with correspondingly smaller angular intervals for more markings). The locking recesses are then advantageously provided at the corresponding intervals.

[0017] The marking drum can have an octagonal cross-section, allowing the markings to be applied to essentially flat areas. If the receiving space is hollow cylindrical, the marking drum can be held in place by the locking lug(s) engaging in the locking recess(es).

[0018] Advantageously, an insertion recess can be provided that runs through the longitudinal direction of the marker carrier and is not congruent with any of the locking recesses in the circumferential direction. This means that they are provided at different angular positions in the circumferential direction, in particular centrally between two locking recesses. Particularly in the case of the aforementioned octagonal shape, the insertion groove is then also provided in an otherwise flat section.

[0019] A positioning recess can be provided in at least one of the base surfaces of the marking drum. This means that at one or both free ends of the marking drum, there is a base surface that advantageously does not protrude laterally beyond a connection arrangement after assembly. The positioning recess then allows the engagement of an assembly tool such as an Allen key or a screwdriver, which rotates the marking carrier in the connection arrangement in a positive fit.

[0020] Each of the markings may have two numbers or symbols arranged next to each other, in particular to ensure that a connection arrangement is identified in accordance with the standard.

[0021] The marking carrier can be divided into two parts transversely to its longitudinal direction, with one of the two digits or symbols being arranged on each of the parts. Each of the parts has a positioning recess at one free end and a central surface running perpendicular to the longitudinal axis of the marking carrier at the opposite free end. This allows the positioning to be broken down to a single digit, so that with, for example, four digits in the ones and tens places, sixteen combinations result instead of four.

[0022] Finally, the marking carrier can also have at least two pairs of numbers or symbols arranged next to each other, so that double connection arrangements can also be marked with a single marking carrier.

[0023] The above-mentioned connection arrangement can have a viewing opening which is limited by an arc-shaped cover. In this case, at least one retaining web which limits the receiving space can then be provided opposite the cover.

[0024] In addition to a terminal arrangement for switches provided on a module holder, the marker carriers can also be designed for series arrangements of auxiliary contact elements if they have flat inner and outer sides, so that a plurality of terminal arrangements can be arranged side by side, with the receiving space extending transversely between the inner and outer sides and the viewing opening provided on the front and / or rear. Individual terminal arrangements, which are mounted on a rail, for example, can then be individually removed and replaced, with the markings being adjusted accordingly before assembly.

[0025] A marking carrier for an electrical connection arrangement thus comprises a marking drum, on whose outer surface at least two markings are applied in the circumferential direction, wherein at least one locking recess is provided on the outer surface at at least one free end of the marking drum. Furthermore, a positioning recess is provided in a base surface of the marking drum near the locking recess.The marking carrier can be positioned in a connection arrangement in a receiving space with a viewing opening, wherein the receiving space has at least one locking lug at the mouth of the receiving space, which is complementary to the at least one locking recess of the marking drum of the marking carrier, wherein the sum of the number of locking lugs and locking recesses is at least three, so that the marking drum can be rotated and positioned in at least two locking positions for displaying a connection marking in the viewing opening.

[0026] The advantages of such a marking carrier are at least two clearly defined locking positions, which can be achieved by rotation. Short and long marking drums can be provided for one or multiple contact switches. Split drums can be implemented for each contact switch connection for separate adjustment of the individual digit. Positioning in the connection arrangements is simple and position-oriented using a mounting groove and locking in the end position, and the adjustable marking content is achieved by simply rotating the drum using a screwdriver or Allen key. The numbers or symbols of the markings can be applied by laser engraving, printing, or 2K injection molding.

[0027] Further embodiments are specified in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Preferred embodiments of the invention are described below with reference to the drawings, which are for illustrative purposes only and are not to be construed as limiting. In the drawings: Fig. 1 a perspective view of a switch with four terminal arrangements, each having a marking carrier; Fig. 2 a perspective view of one of the terminal arrangements from Fig. 1 ; Fig. 3 a perspective view of a double connection arrangement; Fig. 4 a perspective view of two connection arrangements for attachment to the left and right of a module holder in the not yet assembled state; Fig. 5A a perspective view of a marking carrier for single connection arrangements according to one embodiment; Fig. 5B a perspective view of a marking carrier for single connection arrangements according to another embodiment; Fig. 6 a perspective view of a section of a connection arrangement from Fig. 1 with a focus on the recording room; Fig. 7 a perspective view like Fig. 6 from a different angle; Fig. 8 a perspective view of the marker carrier for single connection arrangements, positioned on a receiving space of a connection arrangement; Fig. 9 a perspective view of the marker carrier of the Fig. 8 in the receiving space of a connection arrangement; Fig. 10 a perspective view of a marking carrier for double connection arrangements according to Fig. 3 ; Fig. 11 a perspective view of a section of a connection arrangement from Fig. 3 with a focus on the receiving space; Fig. 12 a perspective view of another, here split, marker carrier for single connection arrangements; Fig. 13 a perspective view of a section of a connection arrangement from Fig. 3 with a focus on the recording room; and Fig. 14 a perspective view as Fig. 13 from a different angle; Fig. 15 a perspective view of the marking carrier according to Fig. 12 for single connection arrangements, positioned in a receiving space of a connection arrangement. DESCRIPTION OF PREFERRED EMBODIMENTS

[0029] The Fig. 1 shows a perspective view of a switch 1 with four connection assemblies 10, each having a marking carrier 20. This switch 1 has a central module holder 2 with two mounting levels, onto which two NC switching elements are flanged one above the other on the left and right sides as connection assemblies 10. These connection assemblies 10 have a housing 11, which has an opposing outer side 12 and inner side 12', wherein the inner side 12', in addition to a flat surface abutting the module holder 2, also has elements for being in an operative connection with the module holder 2. The outer side 12 can, in particular, be designed to be flat. The top side 13 and the bottom side 14 of the housing 11 can be designed to be substantially flat with optional complementary form-fitting elements to enable the stacking of the connection assemblies 10, as in the Fig. 1 shown. Reference numeral 30 designates the screw with which each of the lines can be fastened to the connection arrangement 10.

[0030] This leaves a front side 15 and a rear side 16 of the housing 11 freely designable, in which the marking carriers 20 can be arranged. Fig. 1 In the illustrated embodiment, one marking carrier 20 is provided on the front side 15 and one on the rear side 16. Of course, only one marking carrier can also be provided. The marking carrier 20 is a cylinder 21 that is inserted into a substantially hollow-cylindrical receiving space 19 under a cover 17 and is secured to the housing 11.

[0031] The Fig. 5A shows a perspective view of a marking carrier 20 for single connection arrangements, e.g. for the connection arrangement 10 according to Fig. 1 The cylinder 21 of the marking carrier 20 has, as shown in more detail in the further drawings, a three-part casing 22, 22', 22 and a base surface 23, which advantageously does not protrude beyond the outer sides 12 of the housing 11 and in which a positioning recess 24 (at one end or at both ends) can be provided. The positioning recess 24 is provided for the engagement of a positioning tool such as an Allen key or a screwdriver, in particular for a positive connection in order to rotate the cylinder 21 by turning the positioning tool and thus rotate the desired markings into a viewing opening. In the embodiment according to Fig. 5B There is a continuous lateral surface 122 with otherwise the same features mentioned above.

[0032] Between the cover 17 and the housing 11 on the front 15 or rear 16 of the connection assembly 10, the viewing opening 18 is provided through which a user can see numbers as markings 25 on the casing 22 of the marking carrier 20. In the Fig. 1 From top left to bottom right these are the number combinations 13, 21, 41 and 31. The marker carrier 20 of the Fig. 1 is a 4-way marking drum designed to allow four identical switching elements to be arranged as connection arrangements of 10 with different 10-digit numbers. The units digit here is 1 for NC = "normally closed in," while the numbers 1, 2, 3, and 4 are arranged on each 90-degree section of the casing, allowing a consecutive 10-digit number to be set by rotating the marking drum. A units digit with the value 2 can then represent "normally closed out."

[0033] The Fig. 2 shows a perspective view of one of the connection arrangements 10 from Fig. 1 . The Fig. 3 shows a perspective view of a double connection arrangement 10' and the Fig. 4 shows a perspective view of two connection assemblies 10 for mounting on the left and right sides of a module holder 2 in an unassembled state. Identical features bear identical reference numerals. Similar features in different embodiments are given similar reference numerals.

[0034] In the Fig. 2 Particularly noteworthy for the simple connection arrangement 10 are the engagement elements 120 (here an eyelet projecting beyond the inner side 12), which are designed to complement corresponding elements in the module holder 2 (or 2', etc.) in order to fasten the connection arrangement 10. Since the connection arrangement 10 will abut against this module holder 2 with its inner side 12' relative to the module holder 2 to be flanged, the surface of the inner side 12' is closed with respect to the hollow cylindrical receiving space 19, so that the marking carrier 20 can only be inserted into it from the left.

[0035] The Fig. 3 shows a double connection arrangement 10', also for attachment to a module holder 2 from the left. The engagement elements 120 serve to fasten the double connection arrangement 10'. Both switching contact units are connected here by a common intermediate wall 12" of the double connection arrangement 10'. Similar to the connection arrangement 10 according to Fig. 2 Here, a (double) marking carrier 20' is inserted from the left into the continuous receiving space 19, whereby an opening for the receiving space 19 is also provided in the intermediate wall 12".

[0036] Similar to the later described explanations according to Fig. 12 bis 15 In other embodiments, two individual marking carriers 20 can also be provided, in which case an insertion opening must be provided in the inner side 12' and the insertion and setting of the numbers of the marking carrier directly adjacent to the module holder 2 must be carried out before mounting on the module holder 2.

[0037] The Fig. 4 shows a perspective view of two connection assemblies 10 for left and right mounting on a module holder 2 in an unassembled state. The two connection assemblies 10 can be identical; for this, a rotation of a connection assembly 10 positioned on the left by 180 degrees around the longitudinal axis of the module holder 2 is sufficient to reach the position of the connection assembly 10 positioned on the right. Care must be taken to ensure the correct setting of the markings 25.

[0038] The Fig. 5A shows a perspective view of a marking carrier 20 for single connection arrangements 10 according to an exemplary embodiment. The cylinder 21 has, as already mentioned above, three different casing parts: an outer casing part 22, which is essentially round-cylindrical, and a central casing part 22', which is square in cross-section and thus provides four flat surfaces, on each of which two digits 25 are arranged. If these are used according to the standard mentioned above, there is a digit 225 (tens digit), which is a switch number from 1 to X, and a second digit 125 (units digit), which, for example, in the case of the applicant's switches, lies between 1 and 4: 1 - in NC contact, 2 - out NC contact, 3 - in NO contact, 4 - out NO contact.

[0039] Adjacent to the base surfaces 23 there is a bevelled chamfer 26 for easier insertion of the marking carrier 20 into the receiving space 19. The marking carrier 20 is at a different angle than in the Fig. 8 shown so that the insertion recess 29 in the Fig. 5A only partially visible with its opening at the free end 23. In other designs, the insertion recess 29 can also be congruent with the locking recess 27 extending to the free end. According to the square cross-section, there are also four locking recesses 27 spaced 90 degrees apart. If six surfaces are required in the central casing 22', the cross-section is a hexagon with six flat surfaces and also six locking recesses 27.

[0040] The Fig. 5B shows a perspective view of a marking carrier 20 for single-connection arrangements 10 according to another exemplary embodiment. The cylinder 21 has a substantially octagonal surface 122, on which two digits 25 are arranged, namely a ones digit 125 and a tens digit 225.

[0041] Adjacent to the base surfaces 23 there is a bevelled chamfer 26 for easier insertion of the marking carrier 20 into the receiving space 19. The marking carrier 20 is similar to the marking carrier 20 from the Fig. 5A shown so that the insertion recess 29 in the Fig. 5B is not visible here at all, since it coincides with a locking recess 27.

[0042] At both free ends in the area of ​​the chamfers 26, locking recesses 27 are provided.

[0043] Here, there are four locking recesses 27 at a 90-degree distance from each other along the circumference of the casing. Each locking recess 27 is rounded in the circumferential direction and arranged in relation to the markings 25 such that a pair of markings is visible in the viewing opening 18 when locking lugs 127, as described later, are engaged. If not four markings 25 are provided, but for example three, which are spaced at an angular distance of 120 degrees from each other, then three locking recesses 27 are arranged at the corresponding distance from each other. In an embodiment according to Fig. 5A the cross section is then a triangle with only three faces for the digits 25. The same applies to two, five or six markings 25. A larger number, such as eight markings 25, would then be connected at an angular distance of 45 degrees, so that the viewing opening 18 would then release a very small arc angle in order to have exactly one marking 25 visible in the window.

[0044] Fig. 6 shows a perspective view of a section of a connection arrangement. 10 from Fig. 1 with a focus on recording room 19 and Fig. 7 shows a perspective view like Fig. 6 from a different angle. In the area of ​​the opening of the receiving space 19, a locking lug 127 is provided. This is in the Fig. 6 und 7 In the embodiment shown, it is arranged at the free end of the cover 17. However, it can also be provided at a different location at the mouth of the receiving space 19. Several locking lugs 127 can also be provided, which are then of course arranged at the correct angular distance from one another. The inner surface 123 is a cylindrical surface with an inner diameter that is sufficiently large for the insertion of the marking carrier 20, i.e., for a marking carrier 20 according to Fig. 5A with a diameter such that the round-cylindrical outer surfaces 22 are inserted and advantageously also guided. At the mouth of the hollow-cylindrical receiving space 19, there is a flat abutment surface 112, which belongs to the wall of the inner side 12' of the connection arrangement 10.

[0045] The Fig. 8 shows a perspective view of an embodiment of a marking carrier 20 for single connection arrangements, positioned in a receiving space 19. An insertion recess 29 can be seen, which has the same rounded design as the locking recesses 27, but between two locking recesses 27 and then over the entire length of the two round-cylindrical outer surfaces 22 corresponding to the longitudinal axis of the marking carrier 20. To assemble the marking carrier 20, it is aligned such that the insertion recess 29 is arranged opposite the locking lug 127, so that the marking carrier 20 can be inserted into the receiving space 19 over its entire length. It is then rotated about its longitudinal axis into the desired position so that the desired markings 25 are visible.For this purpose, the positioning recess 24 is provided in the base surface 23, into which an Allen key or screwdriver can be inserted, allowing the marker carrier 20 to be rotated about its longitudinal axis. Instead of an insertion recess 29, additional insertion recesses 29 can also be provided between each pair of locking recesses 27. The insertion recess(es) 29 can also be referred to as insertion grooves.

[0046] The cover surface 17 is designed as a thinner cover surface 126 due to a draft angle in the injection molding tool provided for the exemplary embodiment, but can also have a consistent thickness throughout. The nose 128 is a rounded portion that serves as an extension of the support web 117 to prevent contact when joining the housing parts. However, the support web 117 can also be designed in the same way as on the other side of the viewing opening 18.

[0047] The Fig. 9 shows a perspective view of the marker carrier of the Fig. 8 in the receiving space 19 of a connection arrangement 10, before it has been rotated into a position for identifying the connection arrangement 10. At the inlet end of the receiving space 19 near the side surface 12', opposite the cover 17, there is a retaining web 117 which laterally closes off the visible surface 18 and represents a continuation of the inner lateral surface 123.

[0048] The Fig. 10 shows a perspective view of a marker carrier 20' for double connection arrangements 10' according to Fig. 3 The only difference between the marker carrier 20 to Fig. 5A and the marking carrier 20' is double its length and the provision of two pairs of markings 25. It would also be possible to design the middle flattened shell surface part 22' round-cylindrical, since it is located opposite a support web 117". In a design with a different cross-section such as the mentioned octagonal one according to Fig. 5B then the lateral surface is continuous.

[0049] The Fig. 11 shows a perspective view of a section of a connection arrangement 10' from Fig. 3 with a focus on the receiving space 19. The essential difference lies only in the provision of a support web 117" in the intermediate wall 12", which effectively divides the viewing opening 18 in two.

[0050] The Fig. 12 shows a perspective view of a split marker carrier 20" for single connection arrangements 10. The design of the split marker carrier 20" corresponds to that of the undivided marker carrier 20 with the only difference that it is divided along a transverse plane into two parts, which touch each other at a central surface 28 in the assembled state. However, it is then necessary that the positioning recesses 24 are provided on both sides and also that the locking recesses 27 are provided at both free ends. In the assembled design, the split marker carrier 20" looks as in Fig. 1 , wherein in the hollow cylindrical receiving space 19, not one but two half-length marking carriers are inserted, which abut one another at the surfaces 28. One has the numbers of the 1s digit, for example 1 to 4, to indicate NC and NO switches, and the numbers of the 10s digit, for example from 1 to 4 or from 5 to 8, so that up to eight switches can be marked with three marking carriers 20" in accordance with the standard. It can also be provided that the end of the outer surface 22' at the surfaces 28 is again round-cylindrical, at least in a narrow end section, if a support web (see Fig. 15 ) is provided. A marking carrier according to Fig. 5B can be shared in the same way.

[0051] The Fig. 13 shows a perspective view of a section of a double connection arrangement 10' from Fig. 3 with a focus on recording room 19 and Fig. 14 shows a perspective view like Fig. 13 from a different perspective. The round-cylindrical inner surface shows that the surfaces 22, 22', or 122 can be designed differently and also have different cross-sections.

[0052] Fig. 15 shows a perspective view of the split marker carrier 20" according to Fig. 12for single connection arrangements 10, positioned on both sides of a receiving space 19 of such a connection arrangement 10. The insertion recesses 29 are positioned opposite the locking lugs 127, and upon corresponding insertion until flush with the base surface 23, the central surfaces 28 then touch each other, and the two markings 25 can be adjusted separately. The numbers 4-4 here indicate an NO contact of the fourth switch. They are each supported on the outside by the holding webs 117. A support web (not shown in the drawings) can be provided centrally in the window 18, which projects to the free ends on the surfaces 28. LIST OF REFERENCE SYMBOLS

[0053] 1 Switch 2 Module holder (two levels) 2 Module holder (one level) 10 Terminal arrangement (single) (left and right have the same designation) 10 Double terminal arrangement (left) 11 Housing 12 Outside 12 Inside 12 Partition 13 Top 14 Bottom 15 Front 16 Rear 17 Cover 18 Viewing opening 19 Mounting space 20 Marking carrier (single, two digits) 20 Marking carrier (double, two times two digits) 20 Marking carrier (single, one digit) 21 Cylinder 22 Casing (outer segment) 22 Casing (middle segment) 23 Base surface 24 Positioning recess 25 Marking 26 Chamfer 27 Locking recess 28 Middle surface 29 Insertion recess 30 Clamping screw 112Abutment surface 117Retaining web 117Support web 120Engaging element 122Octagonal surface 123Hollow cylindrical / round cylindrical inner surface 125Units digit 126Thinner cover surface 127Locking lug 128Loop 225Tens digit

Claims

1. A marking carrier (20, 20', 20") for an electrical connection arrangement (10), comprising a marking drum (21) on whose outer surface (22, 22'; 122) at least two markings (25) are applied in the circumferential direction, wherein at least one locking recess (27) is provided on the outer surface (22) at least at one free end of the marking drum (21) and a positioning recess (24) is provided in a base surface (23) of the marking drum (21) close to the locking recess (27).

2. Marking carrier (20, 20', 20") according to claim 1, characterized in that a number of locking recesses (27) corresponding to the number of markings (25) are present.

3. Marking carrier (20, 20', 20") according to claim 1 or 2, characterized in thatthe outer surface of the marking drum (21) is a round-cylindrical outer surface (22) at the opposite free ends and has a regular polygonal shape in cross-section in a central outer surface (22') of the marking drum (21).

4. Marking carrier (20, 20', 20") according to claim 1 or 2, characterized in that the outer surface (22) of the marking drum (21) has a continuously round-cylindrical shape (22) or an octagonal shape (122) in cross-section.

5. Marking carrier (20, 20', 20") according to one of claims 1 to 4, characterized in that an insertion recess (29) is provided which is continuous in the longitudinal direction of the marking carrier (20, 20', 20") and which is not congruent with any of the locking recesses (27) in the circumferential direction.

6. Marking carrier (20, 20', 20") according to one of claims 1 to 5, characterized in thata positioning recess (24) is provided in at least one of the base surfaces (23) of the marking drum (21).

7. Marking carrier (20, 20', 20") according to one of claims 1 to 6, characterized in that each of the markings (25) comprises two numbers (125, 225) or symbols arranged side by side.

8. Marking carrier (20") according to claim 7, characterized in that the marking carrier (20") is divided into two parts transversely to its longitudinal direction, one of the two numbers or symbols (125 or 225) is arranged on each of the parts, each of the parts has a positioning recess (24) at one free end and a central surface (28) running perpendicular to the longitudinal axis of the marking carrier (20") at the opposite free end.

9. Marking carrier (20') according to one of claims 1 to 7, characterized in that the marking carrier (20') has at least two pairs of numbers or symbols arranged next to one another.

10. Connection arrangement (10, 10') with at least one marking carrier (20, 20', 20") according to one of claims 1 to 9, characterized in that the connection arrangement (10, 10') has a receiving space (19) with a viewing opening (18) for the marking carrier (20) which can be rotatably inserted into the connection arrangement (10, 10'), wherein the receiving space (19) has at least one locking lug (127) at the mouth of the receiving space (19), which is complementary to the at least one locking recess (27) of the marking drum (21) of the marking carrier (20), wherein the sum of the number of locking lugs (127) and locking recesses (27) is at least three, so that the marking drum (21) can be rotated and positioned in at least two locking positions for displaying a connection marking in the viewing opening (18).

11. Connection arrangement (10, 10') according to claim 10, characterized in that the viewing opening (18) is limited by an arcuate cover (17) 12. Connection arrangement (10, 10') according to claim 11, characterized in that at least one retaining web (117, 117") is provided opposite the cover (17) and delimits the receiving space (19).

13. Connection arrangement (10, 10') according to one of claims 10 to 12, characterized in that the receiving space (19) has a hollow cylindrical inner surface (123).

14. Connection arrangement (10, 10') according to one of claims 10 to 13, characterized in that the receiving space (19) is delimited on its side opposite the mouth by an abutment surface (112).

15. Connection arrangement (10) according to one of claims 10 to 14, characterized in that it has flat inner sides (12') and outer sides (12), so that a plurality of connection arrangements (10) can be arranged next to one another, wherein the receiving space (19) extends transversely between the inner side (12') and the outer side (12) and the viewing opening (18) is provided on the front side (15) and / or the rear side (16).

Images