EP1178569A2 - Electric connecting element - Google Patents

Abstract

An electrical connector element has a split taper socket (10), into which the end of a wire can be inserted and clamped fast, and an insulating sleeve (20) connected to it, which has a connector contact (21). As the split taper socket and the insulating sleeve are connected together, the connector contact for the insulating sleeve is brought into contact with the wire end and held there as the wire insulation is removed.

Description

The present invention relates to an electrical connection element, that to an electrically insulated end of a wire Can be connected with the end of the wire when connecting the connection element stripped and secure at the same time is fastened in the connecting element.

When connecting connection elements such as electrical sockets or electrical plugs, to an electrical wire the end of the wire is conventionally stripped and then by means of a clamp or screw connection with the connection element connected. However, there are applications where when connecting a connection element to a wire of stripped wire must not be touched. For example, this is in medical technology the case when e.g. B. a external pacemaker connected to the heart muscle Cables leading out of the body can be connected should. In this case, those led out of the body may Lines are not touched in their conductive core. A Touching the conductive core of the wire could be an electrostatic Cause discharge. Such an electrostatic Discharge can lead to severe cardiac arrhythmias cause ventricular fibrillation. In this exemplary case So the connector needs to be cut to the, but continue to connect electrically insulated end of the wire be removed without first removing the wire insulation becomes.

From the state of the art are especially from the company Multi-Contact AG, Basel so-called clamp plugs, where the insulated wire is clamped in the connector and at the same time the insulation is removed, known. These plugs but are relatively complex, prone to errors, voluminous and cumbersome to use because it a. a spring element and include a push button. There are also various connector elements known for stripped wires.

The invention has for its object an electrical connection element for connection to an electrically insulated Provide end of a wire with the wire end in front the connection does not have to be stripped, which is easy to do handle and that is a small size and a simple Has structure.

The object is achieved by the electrical Connection element that those listed in the main claim Features resolved. The subclaims give preferred Training courses.

The electrical connection element according to the invention consists of two parts, a so-called clamping sleeve and a so-called Insulation sleeve that can be connected to each other. The electrically insulated end of the wire to which the electrical Connection element to be connected is first in the clamping sleeve inserted and provisionally clamped there. For this purpose it can be trained in a corresponding, for example Channel of the clamping sleeve are inserted and clamped.

This channel is preferably designed such that the end of the wire inserted in a double force relief loop and is held.

The clamping sleeve and insulation sleeve are designed so that if they are screwed together, for example be connected, clamp the wire between itself and its Eliminate the insulation, using a connection contact that at the insulation sleeve is provided in electrical contact comes with the now stripped end of the wire.

This pinching and stripping the wire end at the same time to enable, the clamping sleeve preferably has one to the connection point with the insulation sleeve in diameter widening recess, for example in the form of a Funnel can be designed on. The end of the wire is advantageously inserted so far into the clamping sleeve that the end of the wire is roughly at the junction located between the clamping sleeve and insulation sleeve. The connection contact the insulation sleeve includes a forward tapered crimp contact element, which is designed so that when connecting the ferrule and insulation sleeve in penetrates the recess of the clamping sleeve. It squeezes it end of the wire located there against the wall of the recess the clamping sleeve.

The crimp contact element can take into account the above specified shape can be designed differently. It can, for example, from a screw thread, from several disks arranged one behind the other at a distance, which taper in diameter, or from several in diameter ever smaller cylinders exist. critical is that when the pinch contact element penetrates the The end of the wire is not compressed, but securely against the wall the recess of the clamping sleeve is pressed, and at the same time the insulation of the wire end is removed. The outer Edges of the crimp contact element must therefore be so sharp be that they remove the insulation from the wire end can, but again they must not be so sharply trained be that they cut through the wire. A offers further security against cutting the wire strand a certain flexibility of the clamping sleeve material.

The connection contact of the insulation sleeve also shows Pinch contact element advantageously also with this Crimp contact element electrically connected connecting element on. At this connecting element, for example in Formed a plug pin or a socket can be a corresponding matching socket or a connector pin are connected so that to the invention Connection element a further electrical Line and electrical wires are connectable. The The plug pin and the socket should be as possible be isolated from the outside so that it can be prevented that a user connects to the stripped wire comes.

Clamping sleeve and insulating sleeve can be made in different ways be connected to each other. For example, you can do this with suitable screw threads or a connecting device in the form of a bayonet lock or a Luer lock lock be provided.

Clamping sleeve and insulation sleeve must be made of one electrical insulating material. For example an impact resistant and at the intended application temperatures little flowing plastic are used. When used in the medical field, it is advantageous if a plastic or other material is chosen is easily sterilized, for example by ethylene oxide can be. So even under unfavorable operating conditions no corrosion occurs and always a good electrical one Contact is guaranteed, it is advantageous if the electrically conductive parts, such as the connection contact the insulation sleeve, made of non-corrosive materials, such as stainless steel. Furthermore these materials can still be coated, e.g. B. brass gold-plated to further improve the electrical contact.

In a further preferred embodiment of an electrical Connection element can be the clamping sleeve and the insulating sleeve by a snap ring against an unintentional mutual loosening, for example by screwing be secured. The clamping sleeve can be adjacent to this Provide an external thread on the outside with a projection be inserted in a gap on the circumference of the locking ring is and a locking connection between the clamping sleeve and locking ring manufactures.

In a preferred embodiment, the locking ring when screwing the clamping sleeve and the insulation sleeve together when a cogging torque is exceeded due to deformation Overcome the lead. The head start is dimensioned that if the two sleeves are screwed further, they are in the internal thread the insulation sleeve disappears and no interaction has more with the locking ring. The sleeves can then without screwed further resistance and the inserted wire be squeezed.

The insulation sleeve can have a peripheral bead on its outside and provided at least one axially directed web be a stop for at least one on the Forms locking hooks arranged on the inside of the locking ring, provided that the clamping sleeve is locked together with the one that is locked with it Snap ring is screwed into the insulation sleeve, whereby the at least one latching hook cannot be detached from the circumferential bead can be snapped in and thereby unscrew the clamping sleeve and insulation sleeve prevented.

After installing the clamping sleeve and the insulating sleeve so that the locking ring ensures that the insulation sleeve and no longer twist the clamping sleeve against each other and thereby can separate from each other again. Preferably, the Insulation sleeve on four axially directed webs, the stops for four snap hooks arranged on the snap ring. This can ensure that practically none Rotational movement of the insulation sleeve relative to the clamping sleeve possible is.

Overall, the electrical connection element according to the invention an easy to use, simply constructed, small one Connection element that is secure on a non-stripped Wire can be attached, the user with the electrically conductive part of the wire not in contact comes, so that the electrical connection element according to the invention especially in medical technology, for example in Connection of an external pacemaker, particularly advantageous can be used.

Two embodiments of a designed according to the invention electrical connection element are based on the accompanying drawings explained. In the drawings are same elements in all drawing figures with the same Reference numbers marked.

Fig. 1

einen schematischen Querschnitt durch eine Ausführungsform eines erfindungsgemäßen elektrischen Anschlusselements im auseinandergezogenen Zustand;

Fig. 2

einen schematischen Querschnitt durch das in Fig. 1 dargestellte erfindungsgemäße Anschlusselement im zusammengefügten Zustand;

Fig. 3

eine andere Ausführungsform des Anschlusskontaktes der Isolationshülse;

Fig. 4

eine nochmals andere Ausführungsform des Anschlusskontaktes der Isolationshülse;

Fig. 5

ein Beispiel für die Anwendung des erfindungsgemäßen elektrischen Anschlusselements beim Anschluss eines Herzschrittmachers;

Fig. 6

eine perspektivische Ansicht eines weiteren Ausführungsbeispiels eines Anschlusselements im auseinandergezogenen Zustand;

Fig. 7

einen Längsschnitt durch das Anschlusselement aus Fig. 6 im aufgeschraubten Zustand, wie es vor und während der Einführung eines Drahtes vorliegt; und

Fig. 8

einen Längsschnitt durch das Anschlusselement aus Fig. 6 im zugeschraubten Zustand, wie es nach der Montage an den Draht vorliegt.

Show it:

Fig. 1

a schematic cross section through an embodiment of an electrical connection element according to the invention in the exploded state;

Fig. 2

a schematic cross section through the connecting element according to the invention shown in Figure 1 in the assembled state.

Fig. 3

another embodiment of the connection contact of the insulation sleeve;

Fig. 4

yet another embodiment of the connection contact of the insulation sleeve;

Fig. 5

an example of the application of the electrical connection element according to the invention when connecting a pacemaker;

Fig. 6

a perspective view of another embodiment of a connecting element in the exploded state;

Fig. 7

a longitudinal section through the connecting element of Figure 6 in the screwed state, as it is before and during the insertion of a wire. and

Fig. 8

a longitudinal section through the connecting element of Fig. 6 in the screwed state, as it is after mounting on the wire.

Fig. 1 shows a schematic cross section through an embodiment of the electrical connection element according to the invention. The individual elements are for a clearer representation of the connecting element in the pulled-apart state shown. The electrical connection element according to the invention consists of two parts, namely a clamping sleeve 10 and one Insulation sleeve 20. The end of the wire is in the clamping sleeve 30, which is to be connected to the connecting element, introduced. For this purpose, the clamping sleeve 10 has an opening in which the wire 30 can be inserted. In the illustrated here Embodiment, this opening consists of a channel 12 and a funnel-shaped inlet 14, through which the Wire 30 introduced in the form of a force relief loop can be. The clamping sleeve 10 points to the insulation sleeve 20 facing end a widening recess 16, which is designed here in the form of a funnel. In this recess 16 the wire 30 is later clamped. The wire 30 must be inserted so far into the clamping sleeve 10 that its end approximately with the end of the recess 16.

In this recess 16 of the clamping sleeve 10 engages when the clamping sleeve 10 and insulation sleeve 20 are connected to one another, the crimp contact element 22 of the connection contact 21 of the Insulation sleeve 20 and clamps the end of the wire 30, as can be seen better in FIG. 2 described below can. The crimp contact element 22 has a Diameter tapering to the front with edges is on. The crimp contact element 22 shown here is in the form of a screw.

The connection contact 21 of the insulation sleeve 20 also has an electrically connected to the crimp contact element Connecting element 23. This is in the form of a direct one with the pin contact element 22 connected connector pin shown. On the connecting element 23, so here the Plug pin, can be a socket, not shown here are connected to the connecting element according to the invention to connect with other electrical wires, for example used to connect an external pacemaker can be. So that the user with the electrical Wire does not come into contact, is the connecting element 23 preferably insulated from the outside. So here is the as Connecting element 23 serving plug pin simply in one outer shell 24 out.

The clamping sleeve 10 and the insulation sleeve 20 must be together get connected. Here is the ferrule 10 with a External thread 18 and the insulation sleeve 20 with an internal thread 25 provided so that the two sleeves together can be screwed. Of course there are also others Connection options, such as a bayonet lock or a Snap connection, conceivable.

Fig. 2 shows in the form of a schematic cross section in Fig. 1 shown connector element according to the invention in the assembled Status. The clamping sleeve 10 and the insulation sleeve 20 are screwed together here and thus together connected. It can be seen how the end of the wire 30 between the crimp contact element 22 and the wall of the recess 16 is squeezed. The edges of the crimp contact element 22, here the outer edges of the screw at the same time the insulation of the wire 30 aside, so that electrical contact between the wire 30 and the Crimp contact element 22 is produced and the electrical Wire 30 at the same time safely between crimp contact element 22 and the wall of the recess 16 is held. At the right end the insulation sleeve 20 can be seen how that as a connector pin trained connecting element 23 is in its shell 24.

Fig. 3 shows another embodiment of the connection contact 21 of the insulation sleeve 20. The crimp contact element 22 the connection contact 21 here consists of several at a distance mutually arranged disks 26, one towards the front have ever smaller diameters.

Fig. 4 shows yet another embodiment of the connection contact 21 of the insulation sleeve 20. The crimp contact element 22 of the connection contact consists of several cylinders 27 arranged one behind the other, the diameter the cylinder 27 is getting smaller and smaller towards the front.

5 shows an application of the invention Connection element when connecting an external pacemaker 40 on a heart wire 50, i.e. H. one with the heart muscle 52 connected and led out of the body Wire 50, which is shown here in the form of a pair of wires. The external pacemaker 40 has two connecting lines 42, each provided with plugs 44 at its end are. These plugs 44 are each with the connecting element 23 of the two inventions used here electrical connection elements 60 connected. The top Connection element 60 according to the invention is here in its pulled apart Condition and the lower connection element according to the invention 60 shown in its assembled state.

6 are the individual parts of a further connection element shown. All parts, with the exception of the connection contact 21, are made of plastic, preferably transparent hard PVC, PC or ABS. Alternatively to cover 24 Fig. 1 here is a touch protection cap 80 for the connection contact 21 provided to avoid their loss via a connecting web 82 with a retaining ring 81 connected is. Touch protection cap 80 should be improved Frictional clamping on the connection contact 21 from a softer Plastic, such as B. PE or PP exist. When using the Connection element for connecting an external pacemaker can the protective cap 80 for marking for the user the implantation position of a pacemaker electrode 30 be color-coded. The retaining ring 81 becomes a backup over the outer surface of the funnel-shaped recess 16 pushed in part 10. Is located on this outer surface also a projection 19 in the form of a raised cylinder sector in front of the external thread 18. The height of the projection 19 is dimensioned so that they the radial thread play between the external thread 18 and internal thread 25 (Fig. 7) corresponds. Thereby the subsequent screw assembly is not affected. The circumferential width of the projection 19 corresponds to the width of one Gap 72 of a locking ring 70 for securing the parts 10 and 20.

When assembling the connection element according to FIGS. 7 and 8 the locking ring 70 is first on the outer surface of the Recess 16 clipped. The projection 19 must be in the gap 72 lie. After inserting the connector 21 into the Insulation sleeve 20, the external thread 18 in the first thread of the internal thread 25 screwed. The rest Locking hook 71 of the locking clamp ring 70 via a circumferential bead 32 the insulation sleeve 20 a. They come between axial webs 28 to lie on the outer surface of the sleeve 20. The locking ring 70 prevents an unintentional in this way Unscrew the parts 10 and 20. The axial webs 28 prevent the locking clip ring from rotating via the locking hooks 71 70. After pushing on the protective cap 80 on the connection contact 21, the connection element is in its ready-to-use condition (Fig. 7).

FIG. 7 also shows how a user operates a Wire, for example the extracorporeal end of an implanted Pacemaker electrode 30 through the funnel-shaped Inlet 14 to an insertion cone 29 of the connection contact 21 slides past along an insertion path 31. The Projection 19 on part 10 in the gap 72 of the locking ring 70 (Fig. 6) ensures the anti-rotation of the locking ring 70 for a light screw-down protection of the entire connector configuration. Through this screw lock it is guaranteed that the user always has a screwed-on, but still connected, ready-to-install connection element after unpacking the item in your hands holds. After inserting the wire 30 or the pacemaker electrode is done by screwing the two together Parts 10 and 20 the fixation by the projection 19 and Gap 72 overcome and finally the wire 30 between the funnel-shaped recess 16 and the pinch contact element 22 (Fig. 6) clamped and stripped.

Fig. 8 shows the connected functional connection element. Before inserting it into a temporary pacemaker 40 (FIG. 5), the touch protection cap 80 must be removed from the connection contact 21 are deducted. When executing a Connection element with a fixed sleeve 24 for protection against contact as in Fig. 1 and the presence of corresponding Safety sockets on the temporary pacemaker can the protective cap 80 can also be dispensed with.

LIST OF REFERENCE NUMBERS

10

collet

12

channel

14

funnel-shaped inlet

16

Recess (funnel-shaped)

18

external thread

19

head Start

20

insulation sleeve

21

connection contact

22

crimp contact

23

connecting element

24

shell

25

inner thread

26

disc

27

cylinder

28

axial webs

29

lead-in chamfer

30

wire

31

Wire 30 insertion distance

32

bead

40

external pacemaker

42

connecting cable

44

plug

50

heartwire

52

heart muscle

60

electrical connection element

70

Rest clamping ring

71

latch hook

72

gap

80

The safety cap

81

retaining ring

82

connecting web

Claims (19)

Electrical connecting element for connection to an electrically insulated end of a wire, characterized in that it has a clamping sleeve (10) into which the end of the wire (30) can be inserted and clamped, and an insulating sleeve (20) which can be connected to it and which can be connected to a Connection contact (21) is provided, wherein when connecting the clamping sleeve (10) and insulation sleeve (20) the connection contact (21) of the insulation sleeve (20) is brought into contact with the end of the wire (30) while removing the insulation of the wire and is held. Electrical connection element according to Claim 1, characterized in that the clamping sleeve (10) has a recess (16) which widens in diameter to the point of connection to the insulation sleeve (20) and into which the connection contact (21) of the insulation sleeve (20) which is a according to the recess (16) tapered crimp contact element (22) is inserted, the wire (30) being clamped between the crimp contact element (22) and the recess (16) of the clamping sleeve (10) while removing its insulation. Electrical connection element according to claim 2, characterized in that the crimp contact element (22) has on its outside a screw thread, the outer edges of which are rounded. Electrical connection element according to Claim 2, characterized in that the crimp contact element (22) comprises individual disks (26) which are arranged one behind the other at a distance and are becoming ever smaller in diameter. Electrical connection element according to claim 2, characterized in that the crimp contact element (22) comprises individual cylinders (27), which are arranged one behind the other and become ever smaller in diameter. Electrical connection element according to claims 2 to 5, characterized in that the connection contact (21) in addition to the crimp contact element (22) also a connection element (23) in the form of an externally insulated socket or an externally insulated plug for connecting a connection plug or comprises a connection socket. Electrical connection element according to one of the preceding claims, characterized in that the connection between the clamping sleeve (10) and the insulation sleeve (20) takes place via a screw thread (18, 25). Electrical connection element according to one of Claims 1 to 6, characterized in that the connection between the clamping sleeve (10) and the insulation sleeve (20) is made via a bayonet catch. Electrical connection element according to one of claims 1 to 6, characterized in that the connection between the clamping sleeve (10) and the insulation sleeve (20) is made via a Luer lock. Electrical connection element according to one of the preceding claims, characterized in that the clamping sleeve (10) has a channel (12) into which the end of the wire (30) can be inserted in the form of a double force relief loop. Electrical connection element according to one of the preceding claims, characterized in that the clamping sleeve (10) and the insulation sleeve (20) consist of impact-resistant, poorly flowing plastic which can be sterilized by ethylene oxide. Electrical connection element according to one of the preceding claims, characterized in that the connection contact (21) of the insulation sleeve (20) consists of stainless steel. Electrical connection element according to claim 12, characterized in that the stainless steel connection contact (21) is provided with a layer to improve the electrical contact. Electrical connection element according to one of the preceding claims, characterized in that it is used for connecting an external pacemaker (40) to electrical wires (50) which are connected to the heart muscle (52) and are led out of the body. Electrical connection element according to one of the preceding claims, characterized in that the clamping sleeve (10) and the insulating sleeve (20) are secured against unintentional mutual loosening by a snap-in clamping ring (70). Electrical connection element according to claim 15, characterized in that the clamping sleeve (10) adjacent to the external thread (18) is provided on its outside with a projection (19) which can be inserted into a gap (72) on the circumference of the latching clamping ring (70). Electrical connection element according to claim 16, characterized in that the locking clamp ring (70) overcomes the projection (19) when the clamping sleeve (10) and the tsolation sleeve (20) are screwed together when a locking torque is exceeded. Electrical connection element according to Claims 15 to 17, characterized in that the insulation sleeve (20) is provided on its outside with a circumferential bead (32) and at least one axially directed web (28), which has a stop for at least one on the inside of the locking ring ( 70) arranged latching hooks (71), provided the clamping sleeve (10) is screwed into the insulation sleeve (20) together with the latching clamping ring (70) which is locked with it, the at least one latching hook (71) being non-releasably latched over the peripheral bead (32) and thereby prevents the clamping sleeve (10) and insulation sleeve (20) from being screwed apart. Electrical connection element according to claim 18, characterized in that the insulation sleeve (20) is provided with four axially directed webs (28) which form stops for four latching hooks (71) arranged on the latching clamping ring (70).

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