terminal block

Abstract

Terminal block (1) with an insulating housing (2) which has a snap-in foot (3) for snapping onto a mounting rail, with at least two conductor insertion openings (10, 24), a separating blade opening (17) and a plug-in receptacle (14) for receiving a component plug (40), and with at least three busbar sections (6, 7, 8) built into the insulating housing (2), wherein the first busbar section (6) has at least one conductor connection (9) for clamping an electrical conductor insertable into an associated conductor insertion opening (10) and, diametrically opposite the at least one conductor connection (9), a first plug contact (13) projecting into the plug receptacle (14) for electrically conductive contacting of a component plug (40) insertable into the plug receptacle (14), wherein the second busbar section (7) adjoins the first busbar section (6) and has at a first end a second plug contact (15) projecting into the plug receptacle (14) for electrically conductive contacting of the component plug (40) that can be inserted into the plug receptacle (14) and at its end opposite the first end a separating blade contact (16a) projecting into the separating blade opening (17) for electrically conductive contacting of a separating blade (18), and wherein the third busbar section (8) adjoins the second busbar section (7) and has a separating blade contact (16b) projecting into the separating blade opening (17) for electrically conductive contacting of the separating blade (18) and at least one conductor connection (22) for clamping an electrical conductor insertable into an associated conductor insertion opening (24), characterized in that the terminal block (1) has an electrically conductive bridging element (26) that the insulating housing (2) further comprises a channel (25) leading from the first busbar section (6) to the second busbar section (7) for receiving the electrically conductive bridging element (26), wherein the bridging element (26) is electrically conductively connected to the first and second busbar sections (6, 7), wherein the bridging element (26) is designed in the form of a current bar and is inserted through an opening of at least the first busbar section (6), wherein the free end of the bridging element (26) protruding from the upper side of the first busbar section (6) is electrically conductively connected with its side edges in an opening of the first busbar section as a plug-in contact.

Description

[0001] The invention relates to a terminal block with an insulating housing, which has a locking foot for snapping onto a mounting rail, at least two conductor insertion openings, a separating blade opening and a plug-in receptacle for receiving a component plug, and with at least three busbar sections built into the insulating housing, wherein the first busbar section has at least one conductor connection for clamping an electrical conductor that can be inserted into an associated conductor insertion opening and, diametrically opposite the at least one conductor connection, a first plug-in contact projecting into the plug-in receptacle for electrically conductive contacting of a component plug that can be inserted into the plug-in receptacle,wherein the second busbar section adjoins the first busbar section and has at a first end a second plug contact projecting into the plug receptacle for electrically conductive contacting of the component plug insertable into the plug receptacle and at its second end opposite the first end a disconnecting blade contact projecting into the disconnecting blade opening for electrically conductive contacting of a disconnecting blade, and wherein the third busbar section adjoins the second busbar section and has a disconnecting blade contact projecting into the disconnecting blade opening for electrically conductive contacting of the disconnecting blade and at least one conductor connection for clamping to an electrical conductor inserted into an associated conductor insertion opening.

[0002] Terminal blocks are also known in a variety of forms as isolating terminals with two separate busbar sections that can be electrically separated from one another or electrically connected to one another via a plug-in or pivoting isolating blade.

[0003] Furthermore, terminal blocks for carrying component connectors are known.

[0004] US 4,159,500 A describes such a conductor terminal block with two busbar sections leading to a slot for a component connector. The component connector can be connected to spring-loaded contacts with protruding contact legs, which are electrically connected to the respective busbar sections. When the component connector is removed, the spring contacts are short-circuited, so that the busbar sections are then electrically connected to each other.

[0005] DE 43 25 614 A1 discloses a terminal block arrangement with overvoltage protection devices which, on the one hand, contact a busbar of the terminal block and, on the other hand, a busbar (support rail) carrying the terminal block arrangement.

[0006] DE 10 2008 014 177 A1 shows a terminal block with two busbar sections that can be electrically connected or separated via a pivoting disconnect blade. Furthermore, cross-bridge openings are provided for accommodating cross-bridges. This allows two adjacent terminal blocks to be electrically connected to each other using a cross-bridge, which plugs into the corresponding busbar section.

[0007] WO 2013 / 167253 A1 discloses an electrical terminal block with a pivoting disconnect lever and two connection slots for accommodating, for example, cross jumpers. The connection slots lead to an associated busbar section for electrically connecting it with a cross jumper.

[0008] DE 10 2006 052 894 A1 shows a terminal block with a spring-loaded contact area for accommodating the contact plug of a test plug. When the test plug is not plugged in, the spring-loaded contact legs in the area are electrically connected to each other, thus connecting the busbar sections. When the test plug is inserted, the contact legs open and are electrically connected to the test plug.

[0009] DE 20 2011 108 572 U1 discloses an adapter for electrically connecting at least one busbar in a terminal block. The adapter has offset terminals for electrically connecting stacked busbar sections.

[0010] DE 20 2010 009 293 U1 discloses a terminal block for electrical conductors with a lower part and an upper part. The upper part is detachably attached to the lower part and can be plugged onto it.

[0011] DE 42 37 732 A1 showed a protective conductor terminal with a contact foot that can be electrically connected to a busbar section on one side and to the mounting rail on the other. This allows the protective conductor terminal to be connected to ground potential for grounding a system.

[0012] In addition, catalogs (online & printed) as well as other documented publications, such as product sheets, from WAGO and Phoenix Contact show terminal blocks, some of which include disconnect blades, connector receptacles and / or bridging elements.

[0013] Based on this, it is the object of the present invention to create a special terminal block which can be used as a base terminal with a disconnect function, is suitable for plugging in a component connector and whose internal bridging element can be plugged in particularly easily, reversibly and with reliable contact within the framework of optimized production.

[0014] The object is achieved with the terminal block having the features of claim 1. Advantageous embodiments are described in the subclaims.

[0015] For a generic terminal block, it is proposed that the insulating material housing further comprises a channel leading from the first busbar section to the second busbar section for receiving an electrically conductive bridging element which can be electrically connected or is firmly connected to the first and second busbar sections.

[0016] The isolating blade, which can be inserted into the isolating opening, can either be pivoted onto the insulating housing. The isolating blade can also be designed separately from the terminal block and inserted into the isolating blade opening to connect the second and third busbar sections.

[0017] In a terminal block with a disconnect blade opening for accommodating a disconnect blade, which has three busbar sections and a snap-in foot for snapping onto a mounting rail, the channel leading from the first to the second busbar section creates a bridge between the first and second busbar sections using a bridging element accommodated in the channel. This allows the base terminal to be configured at the factory or by the user by installing a bridging element so that the first and second busbar sections are electrically connected to one another. In this case, a plugged-in component plug would make electrical contact between the first and second busbar sections and the at least one electrical conductor that may be clamped to the associated conductor connection. The component plug thus enables potential tapping.A component connector plugged across at least two terminal blocks arranged parallel to each other on the mounting rail can fulfill additional electrical functions. Such a component connector can, for example, be a lightning protection module plugged onto several adjacent terminal blocks, one of which is connected to ground (GND) and at least one other terminal block is non-isolated.

[0018] The terminal block can optionally also be used without a bridging element. In this case, the component plug is electrically connected to the first busbar section on the one hand and to the second busbar section on the other hand by means of the plug contacts protruding into the plug receptacle. The additional channel between the first and second busbar sections thus makes it possible to accommodate an additional bridging element. There is no need for a complex design of the plug contacts so that they automatically create an electrically conductive connection between the first and second busbar sections when a component plug is removed. Furthermore, the plug receptacle for the component plug remains free, compared to the simplest solution in which a bridging plug bridging the first and second plug contacts of the first and second busbar is simply inserted into the plug receptacle instead of a component plug.

[0019] The terminal block thus forms a universal base terminal that can be specifically adapted through simple modification.

[0020] It is particularly advantageous if the locking foot has an electrically conductive locking arm for electrically conductive connection to a mounting rail when the terminal block is snapped onto a mounting rail. If the channel leads to the locking arm in the preferred embodiment, the bridging element can be electrically conductively connected to the locking arm.

[0021] It is therefore optionally possible at the factory or by the user to electrically connect at least one of the first or second busbar sections or both busbar sections together with the locking arm and thus with the mounting rail and thus to use the base terminal as a PE terminal.

[0022] These options are provided by providing a corresponding channel in the insulated housing to accommodate a suitable bridging element.

[0023] Furthermore, it is advantageous if the insulating housing has at least one jumper slot for accommodating a cross jumper. This jumper slot leads to one of the busbar sections, and a push-button contact for a cross jumper plug-in contact is provided on this associated busbar section. Such cross jumpers usually have electrically conductive contact blades or spring pins that are inserted into openings in the busbar sections, such as elongated holes.

[0024] The channel for accommodating the bridging element is preferably arranged in the space between the locking foot and the first and second busbar sections. This leaves the space above the busbar sections, in which the conductor entry openings for the electrical conductors to be connected, the plug-in receptacle for accommodating a component connector, and the isolating opening for accommodating a isolating blade are located, free of the bridging element. Instead, the bridging element is accommodated in the area below the busbar, facing the mounting rail or the locking foot. In this area, there is usually still sufficient space available in a terminal block, even taking into account the required clearance and creepage distances.

[0025] The bridging element can, for example, be a cable or busbar piece that is soldered, welded, riveted, or pressed onto the first and second busbar sections. This is particularly useful when the terminal block is factory-fitted.

[0026] It is also conceivable, however, for the first and / or second busbar section to have plug-in contact elements for plugging the bridging element into the associated busbar section. For example, a spring clamp contact can be provided for clamping a cable or bridging element to the first and / or second busbar section.

[0027] It is particularly advantageous if the first and / or second busbar section has an opening, such as a slotted hole, for receiving and contacting an associated free end of the bridging element. The bridging element is then inserted into the opening, for example, with a flattened free end, and electrically connected there. This can also be achieved or supported by a spring element or other mechanical and / or thermal connection.

[0028] In all described embodiments, the bridging element may be a cable, a wire, a pin, a current bar or the like.

[0029] The invention is explained in more detail below using exemplary embodiments and the accompanying drawings. They show: Fig. 1 - Side view of a first embodiment of a terminal block; Fig. 2 - Detail view in area A of the terminal block from Fig. 1; Fig. 3 - Sectional view in section BB of the terminal block cutout in Fig. 2; Fig. 4 - perspective view of the terminal block from Fig. 1; Fig. 5 - Side view of a second embodiment of a terminal block; Fig. 6 - perspective view of the terminal block from Fig. 5; Fig. 7 - Perspective view of a terminal block arrangement with three terminal blocks arranged next to each other and a component connector plugged across the terminal blocks.

[0030] The Fig. Figure 1 shows a side view of a first embodiment of a terminal block 1 having an insulating housing 2. The insulating housing 2 has a locking foot 3 in its lower area with a movably mounted locking arm 4 and locking lugs 5 for engaging underneath a mounting rail when the terminal block 1 is mounted on such a known mounting rail. The terminal block 1 is then locked onto the mounting rail using the locking lugs 5.

[0031] Furthermore, three busbar sections 6, 7, 8 are installed in the insulating housing 2. The first busbar section 6 has a conductor connection 9 for clamping an electrical conductor that can be inserted into an associated conductor entry opening 10 in the insulating housing on the side opposite the locking foot 3. The conductor connection is designed, for example, as a spring-loaded terminal connection with a clamping spring 11 that is hooked into a conductor receiving opening in the first busbar section 6. The conductor entry opening 10 is provided with a perforated collar 12 through which an electrical conductor is guided laterally.

[0032] Other types of conductor connections 9 are conceivable, such as conductor connections with cage clamps, screw terminal contacts, insulation displacement contacts or plug contacts for receiving mating connectors or similar.

[0033] At the end of the first busbar section 6 opposite the conductor terminal 9, a plug contact 13 is provided, which protrudes upward from the plane of the first busbar section 6, pointing away from the locking foot 6. This plug contact 13 protrudes into a plug receptacle 14 formed in the insulating housing 2 for receiving a component plug 40. This plug receptacle thus forms a receiving space for a plug contour of a component plug 40, which can be electrically connected to the plug contact 13 using suitable mating contacts 41.

[0034] Adjacent to the first busbar section 6, a second busbar section 7 is arranged in the insulating housing 2. This busbar section 7 has a plug contact 15 at its first end, which also projects into the plug receptacle 14. This plug contact 15 is bent away from the plane of the second busbar section 7.

[0035] At the end of the second busbar section 7 opposite this plug contact 15, there is a isolating blade contact 16a, which is also bent away from the plane of the second busbar section 7, pointing away from the locking foot, and projects into a isolating blade opening 17.

[0036] In this illustrated embodiment, a separating blade 18 is pivotally mounted in the separating blade opening 17. For this purpose, a bearing shaft 19 is arranged on the side opposite the plug contact 16 of the second busbar section 7, above a third busbar section 8. In this way, the separating blade 18 can be pivoted away from the plug receptacle 14 and a component plug 40 inserted therein.

[0037] The separating knife 18 has an electrically conductive knife part 20 which is molded or attached to a handle part 21 of the separating knife 18 which is made of insulating material.

[0038] The third busbar section 8 also has a separating blade contact 16b, which leads into the separating blade opening 17 and is aligned with respect to the first separating blade contact 16a and the blade part 20 of the separating blade 18 such that when the separating blade 18 is pivoted into the insulating housing 2, the blade element 20 electrically contacts and bridges the two separating blade contacts 16a, 16b. The separating blade contacts 16a, 16b can, for example, be designed as fork contacts with two fork prongs spaced apart by a slot for receiving the blade element 20.

[0039] In a corresponding manner, the plug contacts 13, 15 for the component connector can also be designed as fork contacts.

[0040] The third busbar section 8 also has a conductor connection 22 on its side opposite the isolating blade contact 16b, which is designed, for example, as a spring-loaded terminal connection with a clamping spring 23. In this regard, reference can be made to the design of the first busbar section 6. Here, too, a conductor insertion opening 24 for inserting an electrical conductor is provided on the side of the insulating housing 2 opposite the locking foot 3. The conductor insertion opening 24 leads to the conductor connection 22.

[0041] It is now provided that in the space between the underside of the first and second busbar sections 6, 7 and the locking foot 3, a channel 25 for receiving an electrically conductive bridging element 26 is present. This creates a space in which an electrically conductive bridging element 26, for example in the form of a cable, a current bar (busbar), a wire or pin or the like, can optionally be received. This channel 25 leads to the area of ​​the first busbar section 6 located between the conductor connection 9 and the plug contact 13, as well as to an area between the plug contact 15 and the isolating blade contact 16a of the second busbar section 7. These areas are provided to create an electrically conductive connection between the bridging element 26 and the first and second busbar sections 6, 7. The bridging element 26 can be mechanically fixed, e.g.by soldering, welding, riveting, crimping, caulking, or the like with the associated first and second busbar sections 6, 7. However, it is also conceivable that the first and second busbar sections 6, 7 have a plug-in contact element that enables subsequent, simple plug-in contacting of a bridging element 26.

[0042] Furthermore, it can be seen that, for example, the first busbar section 6, adjacent to the contact point for the bridging element 26, has a jumper contact 27 with a contact spring 28, which is suspended in a suitable recess in the first busbar section 6. A cross-bridge opening 29 leads to this jumper contact 27 for accommodating one or two cross-bridges next to one another, each of which can be electrically connected to the jumper contact 27 with its contact leg.

[0043] In a corresponding manner, it is conceivable that a spring element is also suspended in a slot in the first busbar section 6 for the bridging contact 26 in order to enable a spring-force plug-in contact of a bridging element 26, preferably in the form of a cable, a wire or current bar.

[0044] Fig. 2 shows a partial view in section A of the Fig. 1. This shows the area where the bridging element 26 is connected to the first busbar section 6 more clearly. It can be seen that the bridging element 26 is inserted through an opening, e.g., an elongated hole, in the first busbar section 6, with the free end of the bridging element 26 protruding from the top side of the first busbar section 6 having a greater width than the part of the bridging element 26 located below it. This widened free end is guided through the correspondingly narrow elongated hole and is electrically connected to the side edges of the bridging element 26 of the elongated hole.

[0045] Fig. 3 shows a sectional view in section BB of the Fig. 2 in the plan view of the first busbar section 6. It is clear that the free end of the bridging element 26 in the form of a current bar has undergone a flattening compared to the usual width B of the bridging element.

[0046] The free end 30 thus has a smaller width B' than the width B of the bridging element 26.

[0047] Fig. 4 omits a perspective view of terminal block 1 Fig. 1. It is clear that the bridging element 26 is bent in the form of an electrically conductive rod or current bar, leading from the first busbar section 6 through the channel 25 to the second busbar section 7. The free ends 30 of the bridging element 26 are guided through elongated holes 31 in the respective busbar section 6, 7 and are electrically conductively connected to the associated first or second busbar section 6, 7 in the region of the elongated hole 31.

[0048] The plug-in receptacle 14 and the separating blade opening 17, diametrically opposite the locking foot 3, are also clearly visible on the top side of the insulating housing 2.

[0049] It can also be seen that the handle part 21 of the separating knife 18 has an actuating opening 32 for receiving, for example, the free end of a screwdriver in order to transfer the separating knife from the bridging position C, also sketched, into the pivoted-out open position D.

[0050] Fig. Figure 5 shows a side view of a second embodiment of a terminal block 1. Here, too, three busbar sections 6, 7, 8 are present, so that reference can essentially be made to what has been said previously.

[0051] In contrast to the first embodiment, the locking foot 3 has an electrically conductive locking arm 33 with a spring-elastic locking finger 34 for electrically conductively contacting the likewise electrically conductive mounting rail when latched in place. This provides a PE terminal block that enables a ground connection. For this purpose, the bridging element 26 is guided along the locking arm 33 and electrically conductively contacted there. For example, the locking arm 33 can be inserted with its free, spread-out end 35 into a contact opening in the bridging element 26 adapted thereto and electrically conductively connected to the bridging element 26.

[0052] In this embodiment, there is no isolating blade 18 pivotably mounted in the insulating housing 2. Instead, a separate isolating plug (not shown) is provided, which can be inserted into the isolating blade opening 17 and there electrically connected to the isolating blade contacts 16a, 16b. Page 13

[0053] Fig. 6 omits a perspective view of the second embodiment of the terminal block 1 Fig. 5. This makes it even clearer that a separate separating plug 36 is inserted into the separating blade opening 17.

[0054] It can also be seen that the electrically conductive locking arm 33 with its spreading end 35 designed as a fork contact engages around the bridging element 26 and contacts it in an electrically conductive manner, whereby an additional material connection can also be advantageous.

[0055] Otherwise, reference can be made to the first embodiment.

[0056] In the first embodiment, a separating plug 36 of the second embodiment can also be provided instead of the pivotable separating blade 18. However, it is also conceivable that in the second embodiment, a pivotable separating blade 18 of the first embodiment is provided instead of the plug-in separating plug 36.

[0057] Fig. Figure 7 shows a perspective view of a terminal block arrangement with three terminal blocks 1a, 1b, 1c arranged side by side. For the construction of these terminal blocks, reference can be made to the above description of the terminal blocks 1 in conjunction with the Fig. 1 to 6.

[0058] It is clear that the two outer terminal blocks 1a and 1c each have a pivoting separating blade 18 and thus the Fig. 1 and Fig. 4 shown versions of the terminal blocks 1. The middle terminal block 1b, however, has a plug-in isolating plug 36 instead of a pivoting isolating blade and is therefore, like the terminal block 1, in the Fig. 5 and Fig.6. In the illustrated embodiment, the middle terminal block 1b is used for signal transmission. The isolating plug 36 and the bridging section 6 for the first and second busbar sections 6 and 7 in the middle terminal block 1b ensure that a signal fed in, for example, via an electrical cable through the conductor entry opening 24 of the middle terminal block 1b is also present at an electrical conductor inserted into the opposite conductor entry opening 10, even without a component plug 40. The pluggable isolating plug 36 ensures that a signal cannot be easily interrupted, as can happen when a pivoting isolating blade 18 is opened.

[0059] The two outer terminal blocks 1a and 1c of the terminal blocks 1a, 1b, 1c arranged directly adjacent to one another on a mounting rail (not shown) are, however, connected to voltage potential or ground.

[0060] In this illustrated terminal block arrangement, a component plug 40 is now placed across all three adjacent terminal blocks 1a, 1b, 1c, wherein the component plug 40 is electrically connected in the plugged-on state to the first and second busbar sections 6, 7 of several of the adjacent terminal blocks 1a, 1b, 1c by means of mating contacts 41, which are adapted to the plug contacts 13, 15 of the terminal blocks 1a, 1b, 1c.

[0061] If the component connector 40 is a surge protection element, the component connector 40 can, for example, have electronics with which the voltage-carrying busbar sections 6, 7 of one of the terminal blocks, e.g., terminal block 1c, are connected to the busbar sections 6, 7 of the opposite outer terminal block, e.g., terminal block 1a, for energy dissipation in the event of an overvoltage, which is connected to ground potential. An electrically conductive connection between the component connector 40 and the signal-conducting terminal block 1b is not necessarily required. However, other variants and electronics of component connectors 40 are also conceivable, in which the electronics are electrically connected to other combinations of the terminal block or to one of the terminal blocks 1a, 1b, 1c, or to all terminal blocks 1a, 1b, 1c when plugged in.

Claims

[1] Terminal block (1) with an insulating housing (2) having a snap-in foot (3) for snapping onto a mounting rail, with at least two conductor insertion openings (10, 24), a separating blade opening (17) and a plug-in receptacle (14) for receiving a component plug (40), and with at least three busbar sections (6, 7, 8) built into the insulating housing (2), wherein the first busbar section (6) has at least one conductor connection (9) for clamping an electrical conductor insertable into an associated conductor insertion opening (10) and, diametrically opposite the at least one conductor connection (9), a first plug contact (13) projecting into the plug receptacle (14) for electrically conductive contacting of a component plug (40) insertable into the plug receptacle (14), wherein the second busbar section (7) adjoins the first busbar section (6) and has at a first end a second plug contact (15) projecting into the plug receptacle (14) for electrically conductive contacting of the component plug (40) that can be inserted into the plug receptacle (14) and at its end opposite the first end a separating blade contact (16a) projecting into the separating blade opening (17) for electrically conductive contacting of a separating blade (18), and wherein the third busbar section (8) adjoins the second busbar section (7) and has a separating blade contact (16b) projecting into the separating blade opening (17) for electrically conductive contacting of the separating blade (18) and at least one conductor connection (22) for clamping an electrical conductor insertable into an associated conductor insertion opening (24), characterized by , that the terminal block (1) has an electrically conductive bridging element (26) that the insulating housing (2) further comprises a channel (25) leading from the first busbar section (6) to the second busbar section (7) for receiving the electrically conductive bridging element (26), wherein the bridging element (26) is electrically conductively connected to the first and second busbar sections (6, 7), wherein the bridging element (26) is designed in the form of a current bar and is inserted through an opening of at least the first busbar section (6), wherein the free end of the bridging element (26) protruding from the upper side of the first busbar section (6) is electrically conductively connected with its side edges in an opening of the first busbar section as a plug-in contact. [2] Terminal block (1) according to claim 1, characterized bythat the locking foot (3) has an electrically conductive locking arm (33) for electrically conductive connection to a support rail when the terminal block (1) is snapped onto a support rail, wherein the bridging element (26) can be or is connected to the locking arm (33) in an electrically conductive manner. [3] Terminal block (1) according to one of claims 1 or 2, characterized by that the insulating material housing (2) further has a jumper shaft (29) for receiving a cross jumper, wherein the jumper shaft (29) leads to one of the busbar sections (6, 7, 8) and a jumper contact (27) for a cross jumper plug contact element is provided on the busbar section (6, 7, 8) assigned to this. [4] Terminal block (1) according to one of the preceding claims, characterized by that the channel (25) for receiving the bridging element (26) is arranged in the space between the locking foot (3) and the first and second busbar sections (6, 7). [5] Terminal block (1) according to one of the preceding claims, characterized by that the bridging element (26) is a current bar piece that is firmly soldered, welded, riveted or pressed onto the first and second busbar sections (6, 7). [6] Terminal block (1) according to one of the preceding claims, characterized by that the second busbar section (6, 7) has an opening for receiving and contacting an associated free end (30) of the bridging element (26). [7] Terminal block (1) according to claim 6, characterized by that the opening for receiving and contacting an associated free end (30) of the bridging element (26) has the shape of an elongated hole. [8] Terminal block (1) according to one of the preceding claims, characterized bythat the free end of the bridging element (26) protruding from the top side of the first busbar section (6) has a greater width than the underlying part of the bridging element (26). [9] Terminal block (1) according to one of the preceding claims, characterized by that the separating blade (18) is part of the terminal block (1) and is pivotally connected to the insulating housing (2). [10] Terminal block (1) according to one of claims 1 to 8, characterized by that the separating blade (18) is designed separately from the terminal block (1) and can be inserted into the separating blade opening (17).

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