Fixing an insulation displacement contact

Abstract

An arrangement (1) comprising an insulation displacement contact (2), a conductor (3), a holder (4) with a socket (5), and an end molding (6), wherein the insulation displacement contact (2) has a first region (7) with two elastic cutting arms (8), a second region (9) with a plug contact (10), and a third region (11) with a cutout (19), wherein the third region (11) is arranged between the first region (7) and the second region (9), wherein the first region (7) of the insulation displacement contact (2) is arranged in the socket (5) of the holder (4), and wherein the conductor (3) is clamped between the cutting arms (8) of the first region (7), wherein the end molding (6) encloses the socket (5) of the holder (4) such that at least the second region (9) with the plug contact (10) of the insulation displacement contact (2) protrudes, and wherein the end molding (6) an undercut in the cutout (19) of the insulation displacement contact (2) is formed.

Description

[0001] The present invention relates to an insulation displacement contact, an arrangement comprising an insulation displacement contact, a method for manufacturing the arrangement and a connection for an electric motor.

[0002] Insulation displacement contacts (IDCs) serve as connecting elements in electrical engineering. With IDCs, the insulation of a conductor is cut, and an electrical connection is established.

[0003] Insulation displacement contacts (IDCs) are used in electric motors, among other applications. These IDCs are inserted into slots on the stator of the electric motor, known as pockets, and connect to a phase wire of a stator winding. A printed circuit board can then be connected to the IDC contact.

[0004] Conventional insulation displacement contacts (IDCs) have the problem that vibrations can cause them to at least partially detach from their pockets or even slip out completely, thus displacing the circuit board connected to the IDCs. This can shift the circuit board from its intended position. As a consequence, sensor signals from the circuit board can be disrupted, and the operation of the electric motor can be impaired.

[0005] The object of the present invention is to fix the insulation displacement contact in a holder with particular reliability, starting from the prior art described above. A further object is to connect a printed circuit board to an electric motor with particular reliability, also starting from the prior art described above.

[0006] These tasks are solved by the arrangement, the method, the connection for electric motors, and the insulation displacement contact according to the independent claims. Further advantageous embodiments are specified in the dependent claims. The features described in the claims and in the description can be combined with one another in any technologically meaningful way.

[0007] According to the invention, an arrangement is presented which comprises an insulation displacement contact (IDC), a conductor, a holder with a socket, and an end-molding. The IDC has a first region with two elastic cutting arms, a second region with a plug contact, and a third region with a cutout. The third region is arranged between the first region and the second region. The first region of the IDC is arranged in the socket of the holder. The conductor is clamped between the cutting arms of the first region. The end-molding surrounds the socket of the holder such that at least the second region with the plug contact of the IDC protrudes. The end-molding forms an undercut in the cutout of the IDC.

[0008] The arrangement is preferably used in electric motors, especially in electric vehicles.

[0009] The insulation displacement contact has a first area with two elastic cutting arms, a second area with a plug contact, and a third area with a cutout. The third area is located between the first and second areas.

[0010] A boundary between the areas is not necessarily defined by structural features of the insulation displacement contact. It is only important that the first area has two elastic cutting arms, the second area has a plug contact, and the third area has a cutout. Preferably, the first area is separated from the second area by the third area.

[0011] The final overmolding encases the holder's slot in such a way that at least the second area, containing the plug contact of the insulation displacement connector, protrudes. For this purpose, a thermoplastic is injected around the holder and the third area of ​​the insulation displacement connector in an injection molding process.

[0012] The end injection molding creates an undercut in the cutout of the insulation displacement contact. This means that material from the end injection molding is injected into the cutout of the insulation displacement contact and forms a positive-locking connection with the contact.

[0013] The first section of the insulation displacement contact (IDC) is located in the holder's slot. Specifically, the first section of the IDC, including its cutting arms, is positioned within the holder's slot. The IDC contact can be clamped in the holder's slot by its cutting arms. The end coating may be in contact with a portion of this first section.

[0014] The second area is not covered by the end molding. "Not covered" in this context means that this area is not in contact with the end molding. The third area can be covered by the end molding, and the cutout is undercut by the end molding. An undercut means, in particular, that the end molding in the cutout in the third area of ​​the insulation displacement contact is positively connected to the insulation displacement contact.

[0015] The positive-locking connection between the end molding and the encapsulation of the holder's slot by the end molding offers the technical advantage of preventing the insulation displacement contact from shifting relative to the end molding and relative to the holder's slot. This effectively prevents the insulation displacement contact from slipping out of the slot due to vibrations.

[0016] Furthermore, it is possible that the first and second areas each have a cutout. However, cutouts in the first and second areas differ from the cutout in the third area in that they are not covered by the final overmolding and / or are undercut.

[0017] The conductor is clamped between the cutting arms of the first section. This allows an electrical connection to be established between the conductor and the insulation displacement contact. If the conductor has an insulating layer, this can be cut through by the cutting arms, thus establishing an electrical connection between the conductor and the cutting arms. The conductor is preferably an electrically conductive wire.

[0018] The plug connector can be designed as a press-fit connection. For example, the plug connector can be designed like a plug connector sold under the name "Elopin".

[0019] This arrangement has the technical advantage that the insulation displacement contact is particularly reliably fixed in the holder's slot. This arrangement effectively prevents the insulation displacement contact from being dislodged from the holder's slot.

[0020] A preferred embodiment of the arrangement comprises three configurations of the arrangement.

[0021] In a first embodiment, the cutout is formed at a first edge of the insulation displacement contact in the third region. The edge of the insulation displacement contact can be described as its outline. A cutout at a first edge of the insulation displacement contact in the third region particularly relates to a section of the outline of the insulation displacement contact that is located neither in the first nor in the second region. The third region of the insulation displacement contact is thus preferably in contact with the end overmolding.

[0022] Preferably, the cutout at the first edge of the insulation displacement contact in the third region is notch-shaped. In particular, the cutout is a notch.

[0023] The notch can be a tapered or wedge-shaped cut in the cutting edge contact. A rounded notch is particularly preferred.

[0024] A rounded notch has the advantage of lower stress concentrations in the insulation displacement contact. In particular, the cutout is a rounded incision.

[0025] The depth of the cutout is not of primary importance here. The cutout is preferably shaped and designed so that the final overmolding engages the cutout of the third area in a recessed manner. In particular, the cutout is shaped so that the final overmolding secures the insulation displacement contact in the slot of the holder.

[0026] Preferably, a second cutout is formed on a second edge of the insulation displacement contact opposite the first edge. This has the advantage that the end overmolding is symmetrical and the insulation displacement contact is therefore also held symmetrically by the end overmolding.

[0027] In a second embodiment, the cutout is an opening in the third area. The end overmolding forms an undercut through the opening of the insulation displacement contact. The shape of the opening in the third area is not particularly important.

[0028] Preferably, the third area has further openings, wherein the end overmolding can form an undercut through the further openings of the third area of ​​the insulation displacement contact.

[0029] A third design is a combination of the first design and the second design.

[0030] The three embodiments offer the advantage that the insulation displacement contact is even more reliably fixed in the holder's slot. These three embodiments also more effectively prevent the insulation displacement contact from being dislodged from the holder's slot.

[0031] In a further preferred embodiment of the arrangement, the cutting arms of the insulation displacement contact each have a through-hole. In particular, the through-holes are not undercut by the end injection molding.

[0032] This design has the technical advantage that the cutting arms are particularly elastic and flexible.

[0033] In a further preferred embodiment of the arrangement, the cutting arms each have a cutting area on their opposing sides. The cutting area on the opposing sides can be used to cut through an insulating layer around the conductor. The insulating layer around the conductor is particularly effectively cut when the conductor is clamped between the cutting arms.

[0034] This embodiment has the technical advantage that a conductor is connected to the cutting arms in a particularly reliable electrical manner.

[0035] In another preferred embodiment of the arrangement, the end overmolding is made of plastic.

[0036] This has the technical advantage that the third area of ​​the insulation displacement contact can be particularly well electrically insulated, and in the first embodiment the cutout and in the second embodiment the opening in the third area of ​​the insulation displacement contact can be undercut particularly safely by the final overmolding.

[0037] In another preferred embodiment of the arrangement, the insulation displacement contact has a stop spaced apart from the plug contact in the second area.

[0038] In another preferred embodiment of the arrangement, the arrangement comprises a printed circuit board (PCB). The PCB is connected to the plug connector and rests against the stop. The insulation displacement contact (IDC) can be inserted into the PCB via the plug connector. The stop serves as an axial end position for the PCB against the IDC contact. The stop thus forms an axial stop for the PCB. The stop determines how far the plug connector can be inserted axially into or through the PCB. The stop allows the plug connector to be inserted into the PCB to a desired position. In this way, for example, optimal contact pressure can be achieved for the plug connector within the PCB.

[0039] Preferably, the insulation displacement contact has at least two plug contacts. This has the advantage of increasing the current-carrying capacity, also known as the current-carrying capacity. A further advantage is that the circuit board can be positively connected to the insulation displacement contact, and the contact can also be secured against rotation relative to the circuit board. The circuit board can thus be attached to the holder particularly securely via the insulation displacement contact.

[0040] As a further aspect of the invention, a method for manufacturing the described arrangement is presented. The method comprises the following steps: a) Punching the insulation displacement contact from a stamped strip, b) Inserting the conductor into the slot, c) Insert the insulation displacement contact with the cutting arms into the slot of the holder, d) Forming the end overmolding around the slot and forming the undercut through the cutout of the insulation displacement contact.

[0041] The described advantages and features of the arrangement are applicable and transferable to the process, and vice versa.

[0042] In a preferred embodiment of the method, in step a) the section is also punched out from the die-cutting strip.

[0043] The die-cutting strip can comprise several insulation displacement contacts (IDCs), which are connected to each other, in particular via the material to be cut. In step a), the material to be cut is therefore cut off as waste between two IDCs. In addition, the cutout from the IDC is then punched out. This cutout can be formed, in particular, at a first edge of the respective IDC in the third region and / or the cutout can be an opening in the third region.

[0044] Another aspect of the invention is a connection for an electric motor.

[0045] The connection comprises a circuit board and the described assembly. The holder is a stator and the conductor is a phase wire. The circuit board is connected to the insulation displacement contact via the plug connector.

[0046] The described advantages and features of the arrangement and the method are applicable and transferable to the connection, and vice versa.

[0047] The arrangement used according to the connection is preferably designed like the arrangement described.

[0048] In a preferred embodiment of the connection, the insulation displacement contact has a stop in the second region, spaced apart from the plug contact. The printed circuit board rests against this stop. The insulation displacement contact can be inserted into the printed circuit board along with the plug contact. The stop serves as an axial end position for the printed circuit board against the insulation displacement contact. The stop thus forms an axial stop for the printed circuit board. The stop determines how far the plug contact can be inserted axially into or through the printed circuit board. The stop allows the plug contact to be inserted into the printed circuit board to a desired position. In this way, for example, optimal contact pressure can be achieved for the plug contact within the printed circuit board.

[0049] Preferably, the insulation displacement contact has at least two plug contacts. This has the advantage that the circuit board can be positively connected to the insulation displacement contact and, furthermore, the insulation displacement contact can be secured against rotation relative to the circuit board. The circuit board can thus be attached to the holder particularly securely via the insulation displacement contact.

[0050] Another aspect of the invention is a cutting clamp contact.

[0051] The insulation displacement contact is stamped from a strip and comprises a first section with two elastic cutting arms, a second section with a plug contact, and a third section with a cutout. The third section is positioned between the first and second sections.

[0052] The cutout is formed at a first edge of the insulation displacement contact in the third area and / or the cutout is an opening in the third area.

[0053] The described advantages and features of the arrangement, the method for manufacturing the arrangement and the connection for an electric motor are applicable and transferable to the insulation displacement contact, and vice versa.

[0054] The invention is explained in more detail below with reference to the figures. The figures show a particularly preferred embodiment, to which, however, the invention is not limited. It should be noted in particular that the figures, and especially the depicted proportions, are only schematic. The same reference numerals denote the same objects, so that explanations from other figures may be used as a supplement. The figures and the proportions shown therein are only schematic. They show: Fig. 1: a sectional view of the arrangement according to the invention in a first embodiment, Fig. 2: a perspective view of the insulation displacement contact according to the invention in a first embodiment, Fig. 3: a sectional view of an arrangement according to the invention in a second embodiment, Fig. 4: a perspective view of a partial area of ​​the arrangement according to the invention Fig. 3, Fig. 5: a perspective view of the arrangement according to the invention Fig. 1, Fig. 6: a sectional view of a connection according to the invention for electric motors.

[0055] Fig. Figure 1 shows a sectional view of the arrangement 1 according to the invention in a first embodiment. The arrangement 1 comprises an insulation displacement contact 2, a conductor 3, a holder 4 with a socket 5, and an overmolding 6. The insulation displacement contact 2 has a first region 7 with two elastic cutting arms 8, a second region 9 with a plug contact 10, and a third region 11 with a cutout 19. The third region 11 is arranged between the first region 7 and the second region 9. The first region 7 of the insulation displacement contact 2 is arranged with the cutting arms 8 in the socket 5 of the holder 4. The conductor 3 is clamped between the cutting arms 8 of the first region 7. The overmolding 6 surrounds the socket 5 of the holder 4 such that at least the plug contact 10 of the insulation displacement contact 2 protrudes. The end overmolding 6 forms an undercut in the cutout 19 of the insulation displacement contact 2.

[0056] The cutting arms 8 of the insulation displacement contact 2 each have a through-opening 13. The cutting arms 8 each have a cutting area 15 on their facing sides 14.1 and 14.2. The end coating 6 is made of plastic. The insulation displacement contact 2 has a stop 16 in the second area 9, spaced apart from the plug contact 10.

[0057] In the first embodiment, the cutout 19 is formed on a first edge 20.1 of the insulation displacement contact 2 in the third region 11. A further cutout 19 is formed on a second edge 20.2 of the insulation displacement contact 2 opposite the first edge 20.1. The cutouts 19 are each rounded notches 21 in the insulation displacement contact 2.

[0058] The cutting arms 8 of the insulation displacement contact 2 each have a through-opening 13. The cutting arms 8 each have a cutting area 15 on their facing sides 14.1 and 14.2. The end coating 6 is made of plastic. The insulation displacement contact 2 has a stop 16 in the second area 9, spaced apart from the plug contact 10.

[0059] To produce the described arrangement 1 in its first embodiment, the procedure comprises the following steps: a) Punching the insulation displacement contact 2 from a stamping strip, b) Inserting conductor 3 into slot 5, c) Insert the insulation displacement contact 2 with the cutting arms 8 into the slot 5 of the holder 4, d) Forming the end overmolding 6 around the slot 5 and forming the undercut in the respective cutout 19 of the insulation displacement contact 2.

[0060] In step a), the cutouts 19 are punched out of the insulation displacement contact 2.

[0061] Fig. Figure 2 shows a perspective view of the insulation displacement contact 2 according to the invention in a first embodiment. The insulation displacement contact 2 is stamped from a die-cut strip and comprises a first region 7 with two elastic cutting arms 8, a second region 9 with a plug contact 10, and a third region 11 with a cutout 19. The third region 11 is arranged between the first region 7 and the second region 9. The cutout 19 is formed on a first edge 20.1 of the insulation displacement contact 2 in the third region 11. A further cutout 19 is formed on a second edge 20.2 of the insulation displacement contact 2 opposite the first edge 20.1.

[0062] Fig. Figure 3 shows a sectional view of an arrangement 1 according to the invention in a second embodiment. The arrangement 1 comprises an insulation displacement contact 2, a conductor 3, a holder 4 with a socket 5, and an overmolding 6. The insulation displacement contact 2 has a first region 7 with two elastic cutting arms 8, a second region 9 with a plug contact 10, and a third region 11 with a cutout 19. In the first embodiment, the cutout 19 is an opening 12. The third region 11 is arranged between the first region 7 and the second region 9. The first region 7 of the insulation displacement contact 2 is arranged with the cutting arms 8 in the socket 5 of the holder 4. The conductor 3 is clamped between the cutting arms 8 of the first region 7. The overmolding 6 surrounds the socket 5 of the holder 4 such that at least the plug contact 10 of the insulation displacement contact 2 protrudes.The end overmolding 6 forms an undercut through the opening 12 of the insulation displacement contact 2.

[0063] The cutting arms 8 of the insulation displacement contact 2 each have a through-opening 13. The cutting arms 8 each have a cutting area 15 on their facing sides 14.1 and 14.2. The end coating 6 is made of plastic. The insulation displacement contact 2 has a stop 16 in the second area 9, spaced apart from the plug contact 10.

[0064] To produce the described arrangement 1 in the second embodiment, the procedure comprises the following steps: a) Punching the insulation displacement contact 2 from a stamping strip, b) Inserting conductor 3 into slot 5, c) Insert the insulation displacement contact 2 with the cutting arms 8 into the slot 5 of the holder 4, d) Forming the final overmolding 6 around the slot 5 and through the opening 12 of the insulation displacement contact 2.

[0065] In step a), the opening 12 is punched out of the insulation displacement contact 2.

[0066] Fig. Figure 4 shows a perspective view of a partial area of ​​the arrangement 1 according to the invention. Fig. 3. In Fig. Figure 4 shows the arrangement 1 without the final overmolding 6.

[0067] Fig. Figure 5 shows a perspective view of the arrangement 1 according to the invention. Fig. 1.

[0068] The final overmolding encloses the holder 4 with the slot 5. Only the second area 9 of the insulation displacement contact 2 protrudes from the final overmolding 6.

[0069] Fig. Figure 6 shows a sectional view of a connection 18 according to the invention for electric motors.

[0070] The connection 18 for an electric motor comprises a circuit board 17 and the described arrangement 1. The holder 4 is a stator and the conductor 3 is a phase wire. The circuit board 17 is connected to the insulation displacement contact 2 via the plug connector 10.

[0071] The insulation displacement contact 2 has a stop 16 in the second area 9, spaced apart from the plug contact 10. The circuit board 17 rests against the stop 16. Reference symbol list 1. Arrangement 2 insulation displacement contacts 3 conductors 4 brackets 5 slots 6. Final injection 7 first area 8 cutting arms 9 second area 10 plug contacts 11 third area 12 Opening 13 Passage opening 14.1; 14.2 Sides of the cutting arms 15 cutting area 16 attacks 17 circuit boards 18 connection 19 Excerpt 20, 20.1, 20.2 Margin 21st notch

Claims

[1] Arrangement (1) encompassing a cutting clamp contact (2), a ladder (3), a holder (4) with a slot (5), and a final overspray (6), wherein the insulation clamp contact (2) has a first area (7) with two elastic cutting arms (8), a second area (9) with a plug contact (10), and a third area (11) with a cutout (19), wherein the third area (11) is arranged between the first area (7) and the second area (9), wherein the first area (7) of the insulation displacement contact (2) is arranged in the slot (5) of the holder (4) and wherein the conductor (3) is clamped between the cutting arms (8) of the first area (7), wherein the end molding (6) encloses the slot (5) of the holder (4) such that at least the second area (9) with the plug contact (10) of the insulation displacement contact (2) protrudes, and wherein the end molding (6) forms an undercut in the cutout (19) of the insulation displacement contact (2). [2] Arrangement (1) according to claim 1, wherein the cutout (19) is formed on a first edge (20.1) of the insulation displacement contact (2) in the third region (11). and / or wherein the cutout (19) is an opening (12) in the third area (11), wherein the end overmolding (6) forms an undercut through the opening (12) of the insulation displacement contact (2). [3] Arrangement (1) according to one of the preceding claims, wherein the cutting arms (8) each have a cutting area (15) on the sides (14.1; 14.2) facing each other. [4] Arrangement (1) according to one of the preceding claims, wherein the end overmolding (6) is made of plastic. [5] Arrangement (1) according to one of the preceding claims, wherein the insulation displacement contact (2) has a stop (16) in the second area (9) spaced apart from the plug contact (10). [6] Arrangement (1) according to claim 5, wherein the arrangement (1) comprises a printed circuit board (17), and wherein the printed circuit board (17) is connected to the plug contact (10) and wherein the printed circuit board (17) rests against the stop (16). [7] Method for manufacturing an arrangement (1) according to any one of claims 1 to 6, comprising the steps: a) Punching the insulation displacement contact (2) from a stamping strip, b) Inserting the conductor (3) into the slot (5), c) Inserting the insulation displacement contact (2) with the cutting arms (8) into the slot (5) of the holder (4), d) Forming the end overmolding (6) around the slot (5) and forming the undercut in the cutout (19) of the insulation displacement contact (2). [8] Connection (18) for an electric motor comprising a printed circuit board (17) and an arrangement (1) according to one of claims 1 to 5, wherein the holder (4) is a stator and the conductor (3) is a phase wire, wherein the printed circuit board (17) is connected to the insulation displacement contact (2) via the plug contact (10). [9] Connection (18) according to claim 8, wherein the insulation displacement contact (2) in the second area (9) has a stop (16) spaced apart from the plug contact (10), and wherein the circuit board (17) rests against the stop (16). [10] Insulation clamp contact (2) punched from a stamped strip comprising: a first area (7) with two elastic cutting arms (8), a second area (9) with a plug contact (10), and a third area (11) with a section (19), wherein the third area (11) is arranged between the first area (7) and the second area (9), wherein the cutout (19) is formed at a first edge (20.1) of the insulation displacement contact (2) in the third area (11). and / or where the cutout (19) is an opening (12) in the third area (11).

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