Insulation displacement connector device, connection structure of coated core wire, and coated core wire connection method

Abstract

To provide an insulation displacement connector device, capable of more firmly holding a coated core wire.SOLUTION: There is provided an insulation displacement connector device 1 that connects a pair of coated core wires which each include a conductor core wire and an insulation coating surrounding the conductor core wire and which extend from mutually opposite sides. The insulation displacement connector device includes a housing 10 and a contact 20 that can be accommodated within the housing 10. The housing 10 includes a holding part 80 that bends the pair of coated core wires and holds the coated core wires to extend toward the contact. The contact 20 has a pair of first slots each corresponding to each of the pair of coated core wires that are bended and extended, and is configured to bond the pair of coated core wires under pressure such that part of the insulation coating of each of the pair of coated core wire is peeled to be conducted with the conductor core wire in the first slot.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pressure-displacement connector device, a structure for connecting a covered core wire, and a method for connecting a covered core wire. [Background technology]

[0002] IDC connectors (Insulation Displacement Connectors) are widely used as a method for connecting a covered core wire, which has a conductor core wire and an insulating coating that covers the conductor core wire, to a terminal, or as a method for connecting such covered core wires together (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 52-135088 Summary of the Invention [Problem to be solved by the invention]

[0004] Fig. 16 is a schematic diagram showing how covered core wires extending coaxially in opposing directions are connected to each other by a pressure-displacement connector device. Fig. 17 is a perspective view showing contacts used in the pressure-displacement connector device shown in Fig. 16. The pressure-displacement connector device 301 has contacts 320 made of a conductive material and a housing 310 that accommodates the contacts 320. The contacts 320 have slots 323 at their ends. A pair of covered core wires 300A, 300B extending opposite each other are bent 90 degrees to be parallel to each other and introduced into the pressure-displacement connector device 301. Then, with the ends of the pair of covered core wires 300A, 300B inserted into the housing 310, the contacts 320 press the covered core wires 300A, 300B. As a result, the coated core wires 300A, 300B enter the slots 323, the coating of each coated core wire 300A, 300B is stripped, and the conductor core wires in the coated core wires 300A, 300B are gripped in the slots 323 of the contacts 320. The conductor core wires of both coated core wires 300A, 300B are electrically connected via the contacts 320.

[0005] 16, the insulation displacement connector device holds each covered core wire by pinching it in a single location in the contact slot, so there is a problem that the pull-out strength is not large and the covered core wires will come out if an excessive pulling force is applied. For this reason, in order to improve the pull-out strength, it becomes necessary to perform an operation such as twisting the pair of covered core wires 300A, 300B.

[0006] SUMMARY OF THE PRESENT INVETION The present invention has been made in consideration of the above problems, and has an object to provide a pressure-displacement connector device capable of more firmly holding a covered core wire. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided an insulation displacement connector device for connecting a pair of covered core wires extending from opposite sides, each of which has a conductor core wire and an insulating coating surrounding the conductor core wire, the insulation displacement connector device comprising: a housing; and contacts that can be accommodated in the housing, the housing having a covered core wire holding portion that bends the pair of covered core wires and holds them so that they extend in parallel toward the contacts, the contacts having a pair of first slots corresponding to each of the bent and extending covered core wires, and configured to crimp the portions of the pair of covered core wires extending in parallel so as to strip a portion of the insulating coating of the pair of covered core wires and establish electrical conductivity with the conductor core wires in the first slots, the covered core wire holding portion having a first holding portion that holds the portions of the pair of covered core wires extending toward the contacts, and a second holding portion that holds the portions of the pair of covered core wires extending in opposite directions. According to the above aspect, the covered core wire holding portion holds the pair of covered core wires bent toward the contact, so that even if a pulling force acts on the covered core wires, the pulling force directly acting on the contacts can be reduced. This makes it possible to hold the covered core wires more firmly. Also, according to the above aspect, the covered core wires are held on both sides of the bent portion of the covered core wires, so that the covered core wires can be reliably held in a bent state. Also, when a pulling load is applied to the covered core wires in opposite directions, the covered core wires come into contact with the first holding portion in a pressed manner, so that the pulling out of the covered core wires can be resisted by frictional force.

[0008] According to one aspect of the present invention, the contact has a first insulation displacement portion having a pair of first slots formed therein, and a second insulation displacement portion having paired second slots formed therein corresponding to each of the paired insulated core wires and spaced apart from the first insulation displacement portion. According to the above aspect, since the covered core wire is crimped at a plurality of points, the covered core wire can be held more firmly. Furthermore, since the covered core wire is surrounded in a bent state, the covered core wire can be held reliably.

[0009] According to one aspect of the present invention, the contact further includes a cutter provided on the tip side with respect to the first slot of the mating covered core wire. According to the above aspect, by pushing in the contact, the insulated core wire can be pressure-welded and the excess portion of the insulated core wire can be cut off.

[0010] According to one aspect of the present invention, the covered core wire holding portion is configured so that the ratio of the distance from the bent portion of the mating covered core wire to the contact with respect to the outer diameter of the covered core wire is 1 to 1.5. According to the above embodiment, it is possible to ensure a tensile strength equal to or greater than that in the case where the covered core wire is connected by the crimp sleeve.

[0011] According to one aspect of the present invention, there is provided a connection structure in which a pair of covered core wires each including a conductor core wire and an insulating coating surrounding the conductor core wire and extending from opposite sides are connected by the above-mentioned insulation displacement connector device, wherein the pair of covered core wires extending from opposite sides are bent and held by a covered core wire holding portion so as to extend in the same direction, and the contacts hold the pair of covered core wires and the conductor core wires within the covered core wires, respectively, and the conductor core wires of the pair of covered core wires are electrically connected.

[0012] According to one aspect of the present invention, there is provided a method for connecting a pair of covered core wires extending from opposite sides, each of which has a conductor core wire and an insulating coating surrounding the conductor core wire, using an insulation displacement connector device, the insulation displacement connector device including a housing and contacts that can be accommodated in the housing, the housing having a covered core wire holding portion, and the contacts having paired first slots corresponding to each of the paired covered core wires, the method including the steps of: pressing the contacts with a tool to peel off a portion of the insulating coating of the paired covered core wires and crimping portions of the paired covered core wires extending in parallel so as to establish electrical conductivity with the conductor core wires in the first slots; and bending the paired covered core wires extending from opposite sides by the covered core wire holding portion and holding them so that they extend in parallel toward the contacts. Effect of the Invention

[0013] According to the present invention, it is possible to provide a insulation displacement connector device capable of more firmly holding a covered core wire. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a insulation displacement connector device according to a first embodiment of the present invention; [Diagram 2] 1 is a vertical sectional view showing an insulation displacement connector device according to a first embodiment of the present invention; [Diagram 3] 1 is a horizontal sectional view showing an insulation displacement connector device according to a first embodiment of the present invention in a pre-assembled state; [Figure 4] 1 is a horizontal sectional view showing an insulation displacement connector device according to a first embodiment of the present invention in an assembled state; [Diagram 5] 1 is a perspective side view showing a contact of an insulation displacement connector device according to a first embodiment of the present invention; [Figure 6] 1 is a perspective view, seen from below, showing a contact of the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 7A] 1 is a perspective view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 7B] 1 is a perspective view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 7C] 1 is a perspective view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 7D] 1 is a perspective view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 8A] 1 is a horizontal sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 8B]1 is a horizontal sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 8C] 1 is a horizontal sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 9A] 1 is a vertical cross-sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 9B] 1 is a vertical cross-sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 9C] 1 is a vertical cross-sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 9D] 1 is a vertical cross-sectional view illustrating a method of connecting a pair of covered core wires using the insulation displacement connector device according to the first embodiment of the present invention. FIG. [Figure 10] FIG. 11 is a perspective view showing the configuration of an insulation displacement connector device according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a perspective view showing a contact of the insulation displacement connector device according to the second embodiment of the present invention. [Figure 12] 13 is a graph showing the relationship between the moving distance and the pressing force when a covered core wire is pressure-welded into each of two pressure-welding slots. [Figure 13] 13 is a graph showing the relationship between the moving distance of the cutter member and the pressing force when cutting two insulated core wires with a cross-sectional area of ​​2 mm2. [Figure 14] This is a graph showing the results of a tensile strength experiment when a coated core wire with a cross-sectional area of ​​2 mm2 and an outer diameter of an insulating coating of 3.3 mm was pressure welded. [Figure 15] This is a graph showing the results of a tensile strength experiment when a coated core wire with a cross-sectional area of ​​a conductor core wire of 1.25 mm2 and an outer diameter of an insulating coating of 2.2 mm was pressure welded. [Figure 16] 1 is a schematic diagram showing how insulated core wires extending coaxially in opposite directions are connected to each other by a pressure-displacement connector device; [Figure 17] 17 is a perspective view showing a contact used in the insulation displacement connector device shown in FIG. 16. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A first embodiment of the insulation displacement connector device and the method for connecting a coated core wire according to the present invention will be described below in detail with reference to the drawings. In the following description, the direction in which the lid of the housing opens is defined as the upper side, and the direction in which the bottom of the housing is located is defined as the lower side. However, the insulation displacement connector device according to each embodiment of the present invention does not necessarily need to be used in a position in which the lid is located at the upper side, and may be used in a position in which the lid is located to the side or below.

[0016] 1 to 4 show a crimping connector device according to a first embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a vertical cross-sectional view, FIG. 3 is a horizontal cross-sectional view in a state before assembly, and FIG. 4 is a horizontal cross-sectional view in an assembled state. As shown in FIGS. 1 to 4, the crimping connector device 1 has a housing 10 and contacts 20. The crimping connector device 1 of this embodiment is a device for connecting one covered core wire 100A having a conductor core wire and an insulating coating provided around the conductor core wire, and the other covered core wire 100B. One covered core wire 100A and the other covered core wire 100B extend coaxially from opposite sides. Note that extending coaxially refers to a state in which the conductor core wires of one covered core wire 100A and the other covered core wire 100B are arranged in a straight line.

[0017] 5 and 6 are perspective views showing a contact of the insulation displacement connector device according to this embodiment, with FIG. 5 being a perspective view seen from the side and FIG. 6 being a perspective view seen from below. As shown in FIGS. 5 and 6, the contact 20 is made of a conductive material and is formed in a U-shape in side view. The contact 20 has a rectangular plate-like base 21 extending horizontally, a first plate-like insulation displacement portion 22 extending from one end of the base 21 in a direction perpendicular to the base 21, and a second plate-like insulation displacement portion 23 extending from the other end of the base 21 in a direction perpendicular to the base 21. The width and thickness of the base 21, the first plate-like insulation displacement portion 22, and the second plate-like insulation displacement portion 23 are constant.

[0018] The first plate-shaped pressure-displacement portion 22 is formed with one first slot 24 corresponding to one covered core 100A and the other first slot 25 corresponding to the other covered core 100B. The second plate-shaped pressure-displacement portion 23 is formed with one second slot 26 corresponding to one covered core 100A and the other second slot 27 corresponding to the other covered core 100B. The one first slot 24 and the one second slot 26 are aligned vertically to the first plate-shaped pressure-displacement portion 22 and the second plate-shaped pressure-displacement portion 23, and the other first slot 25 and the other second slot 27 are aligned vertically to the first plate-shaped pressure-displacement portion 22 and the second plate-shaped pressure-displacement portion 23.

[0019] The slots 24, 25, 26, 27 formed in the contact 20 have the same shape, and the widths of the slots 24, 25, 26, 27 are constant, but the widths may be narrowed toward the bottoms of the slots 24, 25, 26, 27. Alternatively, the bottoms of the slots may be widened to accommodate the expansion of the slots that occurs when the insulated core wires are inserted into the slots. The widths of the slots 24, 25, 26, 27 are narrower at least in part (in the present embodiment, in their entirety) than the diameter of the conductor core wire of the covered core wire to be connected. The material for forming the contact 20 may be, for example, a copper alloy such as C5191-H (phosphor bronze), but is not limited to this as long as it is a conductive material.

[0020] The housing 10 has a storage section 60, a lid section 70 rotatably connected to one edge of the upper surface of the storage section 60, and a holding section 80 that holds the pair of covered core wires 100A, 100B in the storage section 60. The housing 10 can be manufactured by injection molding a resin such as polypropylene.

[0021] The accommodating section 60 is formed in a rectangular parallelepiped shape. The accommodating section 60 has one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B that run parallel from the front surface (the surface diagonally downward to the right in FIG. 1) to the rear surface. The one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B are adjacent to each other in the horizontal direction and communicate with each other. A partition plate 60B is provided between the one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B.

[0022] A first pressure contact guide hole 62A and a second pressure contact guide hole 62B are formed on the upper surface of the accommodating portion 60 at a distance in the front-rear direction. The first pressure contact guide hole 62A and the second pressure contact guide hole 62B are each rectangular, and have a thickness and width substantially equal to the first plate-shaped pressure contact portion 22 and the second plate-shaped pressure contact portion 23 of the contact 20. This allows the first pressure contact guide hole 62A and the second pressure contact guide hole 62B to be inserted with the first plate-shaped pressure contact portion 22 and the second plate-shaped pressure contact portion 23 of the contact 20, respectively. The first pressure contact guide hole 62A and the second pressure contact guide hole 62B are connected to one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B, respectively. Furthermore, the portion of the upper surface of the accommodating portion 60 between the first pressure contact guide hole 62A and the second pressure contact guide hole 62B is recessed to match the thickness of the base portion 21 of one of the contacts 20.

[0023] An engagement protrusion 69 is formed on the side of the storage section 60 opposite to the side to which the lid section 70 is connected. The engagement protrusion 69 extends horizontally in the depth direction, and the lower surface is formed perpendicular to the side surface. In addition, a recess 60A having a rectangular cross section extends from the front edge of the upper part of the storage section 60.

[0024] The holding portion 80 has a first holding portion 63 standing on the front surface of the storage portion 60, and a second holding portion 64 rotatably connected to the lower edge of the front surface of the first holding portion 63.

[0025] The first holding portion 63 includes one guide tube 63A and the other guide tube 63B that are erected along the edges of the one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B. The one guide tube 63A and the other guide tube 63B are each cylindrical and can hold the covered core wires 100A and 100B in a parallel state in the front-rear direction. The lateral inner parts of the one guide tube 63A and the other guide tube 63B are omitted, and the internal spaces communicate with each other through these parts. The lateral outer edges of the front ends of the one guide tube 63A and the other guide tube 63B are formed with U-shaped cutouts 64A and 64B that match the shapes of the one covered core wire 100A and the other covered core wire 100B, respectively. The height of the upper surface of the one guide tube 63A and the other guide tube 63B is located above the bottom surface of the recess 60A of the storage portion 60. The first holding portion 63 holds the portions of one covered core wire 100A and the other covered core wire 100B that extend toward the contact 20.

[0026] The second holding portion 64 has a rectangular plate-shaped plate portion 66 rotatably connected to the front lower edge of the first holding portion 63, and a flap portion 68 erected on the edge of the plate portion 66 opposite the first holding portion 63.

[0027] The plate portion 66 is formed from a rectangular plate material, and is formed with a groove portion 67 extending in the horizontal direction. The cross-sectional shape of the groove portion 67 is formed in an arc shape that matches the shapes of the one coated core wire 100A and the other coated core wire 100B.

[0028] The flap portion 68 is rectangular and stands perpendicular to the plate portion 66. An engaging protrusion 69 is formed at the end of the flap portion 68 opposite the plate portion 66 and stands perpendicular along the edge.

[0029] The holding portion 80 is configured so that the ratio R of the distance (D in Figs. 8A and 9B) of the portion extending in a substantially straight line from the bent portion of the one covered core wire 100A and the other covered core wire 100B to the front surface of the first plate-shaped press-fit portion 22 of the contact 20 to the outer diameter of the one covered core wire 100A and the other covered core wire 100B is 1 to 1.5. This distance corresponds to the distance from the horizontal bottom of the cutout portions 64A, 64B to the front surface of the contact 20.

[0030] The lid portion 70 has a plate portion 71 rotatably connected to one side of the upper surface of the storage section 60, a front portion 72 erected along the front edge of the plate portion 71, a rear portion 73 erected along the rear edge of the plate portion 71, and a flap portion 74 erected along the edge of the plate portion 71 opposite the storage section 60.

[0031] The plate portion 71 is formed in a rectangular plate shape capable of covering the entire width and the entire depth of the upper portion of the storage portion 60 .

[0032] The front surface portion 72 is formed in a long and narrow rectangular shape that corresponds to the recessed portion 60A of the storage portion 60. The height and depth of the front surface portion 72 are set to a height and depth that can be accommodated within the recessed portion 60A of the storage portion 60.

[0033] The rear surface portion 73 comprises an upper rear surface 73A that covers the upper part of the rear surface of the accommodating section 60 over a predetermined height, and a lower rear surface 73B that is spaced apart from the portions that correspond to one coated core wire insertion hole 61A and the other coated core wire insertion hole 61B on the rear surface of the accommodating section 60.

[0034] The flap portion 74 is formed in a rectangular plate shape, and has an engagement portion 75 extending along its lower edge (the upper edge when the lid portion 70 is open as shown in FIG. 1). The upper surface of the engagement portion 75 (the lower surface when the lid portion 70 is open as shown in FIG. 1) is perpendicular to the flap portion 74.

[0035] The second holding portion holds portions of one covered core wire 100A and the other covered core wire 100B that extend in opposite directions. The following describes a method for connecting a pair of covered core wires using the insulation displacement connector device 1 of this embodiment. Figures 7A to 7D, 8A to 8C, and 9A to 9D are diagrams for explaining a method for connecting a pair of covered core wires using the insulation displacement connector device of this embodiment, with Figures 7A to 7D being perspective views, Figures 8A to 8C being horizontal cross-sectional views, and Figures 9A to 9D being vertical cross-sectional views.

[0036] Before the start of connection of the coated core wires 100A and 100B, the plate portion 71 of the cover portion 70 is open 180 degrees relative to the upper surface of the housing portion 60, and the tips of the first plate-shaped insulation displacement portion 22 and the second plate-shaped insulation displacement portion 23 of the contact 20 are inserted into the first insulation displacement guide hole 62A and the second insulation displacement guide hole 62B, respectively. In this state, the tips of the first plate-shaped insulation displacement portion 22 and the second plate-shaped insulation displacement portion 23 of the contact 20 have not reached the one coated core wire insertion hole 61A and the other coated core wire insertion hole 61B. In addition, before the start of connection, the plate portion 66 of the second holding portion 64 of the holding portion 80 is open so as to extend downward.

[0037] In this state, as shown in Figures 7A, 8A, and 9A, one covered core wire 100A and the other covered core wire 100B are inserted into one covered core wire insertion hole 61A and the other covered core wire insertion hole 61B, respectively, until their tips protrude from the rear surface of the accommodating section 60. Then, the base end side portions of one covered core wire 100A and the other covered core wire 100B are bent and arranged to extend laterally through the cutout portions 64A and 64B, respectively. As a result, the tip sides of the bent portions of one covered core wire 100A and the other covered core wire 100B extend toward the contact 20 in a parallel state.

[0038] Next, as shown in Fig. 7B and Fig. 9B, the contact 20 is pressed into the receiving portion 60 of the housing 10 using a jig. By pressing the contact 20, both sides of the first slot 24 and the second slot 26 of the first plate-shaped press-fitting portion 22 and the second plate-shaped press-fitting portion 23 of the contact 20 strip the coating of the one covered core wire 100A. At the same time, both sides of the first slot 25 and the second slot 27 of the first plate-shaped press-fitting portion 22 and the second plate-shaped press-fitting portion 23 of the contact 20 strip the coating of the other covered core wire 100B. This exposes the conductor core wires of the one covered core wire 100A and the other covered core wire 100B. Then, by pressing the contact 20 further, the side of the exposed conductor core wire of the one covered core wire 100A is sandwiched between the first slot 24 and the second slot 26 of the contact 20. At the same time, the side of the exposed conductor core of the other covered core wire 100B is sandwiched in the other first slot 25 and the other second slot 27 of the contact 20. In this way, the covering of one covered core wire 100A engages with the first plate-shaped pressure-displacement portion 22 and the second plate-shaped pressure-displacement portion 23, and the conductor core of one covered core wire 100A is held by the contact 20 in the one first slot 24 and the one second slot 26. In addition, the covering of the other covered core wire 100B engages with the first plate-shaped pressure-displacement portion 22 and the second plate-shaped pressure-displacement portion 23, and the conductor core of the other covered core wire 100B is held by the contact 20 in the other first slot 25 and the other second slot 27. As a result, the conductor core of one covered core wire 100A and the conductor core of the other covered core wire 100B are electrically connected via the contact 20. At the same time, the conductor core wires of one covered core wire 100A and the other covered core wire 100B are fixed to the housing 60 via the contacts 20.

[0039] Next, as shown in FIGS. 7C, 8B, and 9C, a jig is used to cut off the portions of one covered core wire 100A and the other covered core wire 100B that protrude from the rear surface of the housing 10 at their base ends.

[0040] Next, as shown in Figs. 7D, 8C, and 9D, the second holding portion 64 is rotated to close the front surface of the first holding portion 63. By rotating the second holding portion 64 180 degrees, the engaging protrusions 69 of the second holding portion 64 engage with the upper edges of the one guide tube 63A and the other guide tube 63B on the accommodation portion 60 side. This allows the second holding portion 64 to be fixed. By closing the second holding portion 64, the grooves 67 of the plate portion 66 come into contact with the front surfaces of the one covered core wire 100A and the other covered core wire 100B. This allows the second holding portion 64 to hold the one covered core wire 100A and the other covered core wire 100B in a state where they are bent by 90 degrees.

[0041] Furthermore, the lid portion 70 is rotated until the plate portion 71 abuts against the upper surface of the storage portion 60. As a result, the flap portion 74 is positioned along the side surface of the storage portion 60, and the engagement portion 75 engages with the engagement protrusion 69 formed on the side surface of the storage portion 60. As a result, the upper surface of the storage portion 60 is held by the lid portion 70, and the rotation of the lid portion 70 relative to the storage portion 60 is restricted. In this manner, a connection structure between one coated core wire 100A and the other coated core wire 100B is formed.

[0042] In the above embodiment, the positions of the two covered core wires 100A, 100B are determined, and then the tips of the covered core wires 100A, 100B are bent to arrange the covered core wires 100A, 100B in a parallel state toward the insulation displacement connector device 1, but the present invention is not limited to this. For example, the covered core wires may be bent one by one to determine their positions, and then introduced into the insulation displacement connector device. Also, the tips of the two covered core wires may be introduced into the insulation displacement connector device, and the two covered core wires may be bent after being pressure-connected by the connector.

[0043] According to this connection structure, the first covered core wire 100A and the second covered core wire 100B are each crimped at two points by the contacts 20, so that the first covered core wire 100A and the second covered core wire 100B are firmly held in the insulation displacement connector device 1. Furthermore, since the first covered core wire 100A and the second covered core wire 100B are each bent in the holding portion 80, the first covered core wire 100A and the second covered core wire 100B are held by friction in the holding portion 80, and even if a pulling force acts on the first covered core wire 100A and the second covered core wire 100B, this pulling force is prevented from acting as a pulling force on the crimped points by the contacts 20, and is transmitted to each other via the insulation displacement connector device 1. This improves the holding force of the insulation displacement connector device 1 for the first covered core wire 100A and the second covered core wire 100B.

[0044] According to this embodiment, the pair of coated core wires 100A, 100B are bent and held by the holding portion 80 so as to face the contact 20, so that even if a pulling force acts on the coated core wires 100A, 100B, the pulling force that acts directly on the contact 20 can be reduced. This makes it possible to hold the coated core wires more firmly.

[0045] According to this embodiment, the holding portion 80 has a first holding portion 63 that holds the portions of the one and other covered core wires 100A, 100B that extend toward the contacts, and a second holding portion 64 that holds the portions of the one and other covered core wires 100A, 100B that extend in opposite directions. This holds the covered core wires on both sides of the bent portions of the covered core wires 100A, 100B, respectively, so that the covered core wires 100A, 100B can be reliably held in a bent state. In addition, the second holding portion 64 comes into contact with the covered core wires 100A, 100B, so that the pull-out of the covered core wires 100A, 100B can be resisted by frictional force.

[0046] According to the present embodiment, the contact 20 has a first plate-shaped insulation displacement portion 22 in which one and the other first slots 24, 25 are formed, and a second plate-shaped insulation displacement portion 23 in which one and the other second slots 26, 27 corresponding to the paired coated core wires 100A, 100B are formed and provided apart from the first plate-shaped insulation displacement portion 22. This allows the coated core wires 100A, 100B to be more firmly held because the coated core wires 100A, 100B are compressed at multiple points. Furthermore, the coated core wires 100A, 100B are surrounded in a bent state, so that the coated core wires 100A, 100B can be reliably held.

[0047] Furthermore, according to this embodiment, the holding portion 80 is configured so that the ratio of the distance from the bent portions of the one and other covered core wires 100A, 100B to the contact 20 to the outer diameter of the one and other covered core wires 100A, 100B is 1 to 1.5. This makes it possible to ensure a tensile strength equal to or greater than that in the case where the covered core wires are connected by a crimping sleeve.

[0048] Next, a pressure-displacement connector device 201 according to a second embodiment of the present invention will be described with reference to the drawings. Note that the same components as those in the first embodiment are given the same reference numerals and detailed description will be omitted.

[0049] FIG. 10 is a perspective view showing the configuration of an insulation displacement connector according to a second embodiment of the present invention, and FIG. 11 is a perspective view showing contacts of the insulation displacement connector according to the second embodiment.

[0050] As shown in Figures 10 and 11, the insulation displacement connector device 201 of this embodiment differs from the first embodiment mainly in that the contact 220 has a cutter portion 290 and the accommodating portion 260 has a cutter guide hole 62C corresponding to the cutter portion 290.

[0051] The contact 220 according to the second embodiment comprises a first plate-shaped pressure-displacement portion 22, a second plate-shaped pressure-displacement portion 23, a cutter portion 290, a first base portion 224 connecting the first plate-shaped pressure-displacement portion 22 and the second plate-shaped pressure-displacement portion 23, and a second base portion 226 connecting the second plate-shaped pressure-displacement portion 23 and the cutter portion 290.

[0052] The configurations of the first plate-shaped pressure contact portion 22 and the second plate-shaped pressure contact portion are the same as those in the first embodiment. The first base portion 224 connects the first plate-shaped pressure contact portion 22 and the upper portion of the second plate-shaped pressure contact portion .

[0053] The cutter portion 290 is a portion having a sharp lower edge, and is provided parallel to the first plate-shaped pressure contact portion 22 and the second plate-shaped pressure contact portion 23. The second base portion 226 connects the second plate-shaped pressure contact portion 23 and the cutter portion 290 at their sides.

[0054] The accommodation portion 260 has a first pressure contact guide hole 62A, a second pressure contact guide hole 62B, and a cutter guide hole 62C formed on the upper surface. The cutter guide hole 62C is rectangular, and has a thickness and width substantially equal to those of the cutter portion 290 of the contact 220.

[0055] In the first embodiment, when connecting one covered core wire 100A and the other covered core wire 100B, the contact 20 is pressed to crimp the one covered core wire 100A and the other covered core wire 100B, and then the excess length of the one covered core wire 100A and the other covered core wire 100B is cut off by a jig. In contrast, according to the second embodiment, by pressing the contact 20, the one covered core wire 100A and the other covered core wire 100B are crimped together, and the excess length of the one covered core wire 100A and the other covered core wire 100B can be cut off by the cutter portion 290.

[0056] The inventors experimentally investigated the force required to press-connect a coated core wire with a plate-shaped press-connecting member having a slot. In this experiment, a plate-shaped contact having a slot was made of a copper alloy (C2680-EH). The thickness of the contact material was 0.8 mm, and the width of the slot was 0.6 mm. A plate-shaped contact with such a slot was used to press-connect a coated core wire with a cross-sectional area of ​​2 mm2. 2 The contact was pressed against a covered core wire having a seven-strand conductor core wire and an insulating coating, and the movement distance in the pressing direction of the contact and the pressing force required to move the contact were measured.

[0057] Figure 12 is a graph showing the relationship between the moving distance and the pressing force when the coated core wire is press-welded into each of two press-welding slots. As shown in the figure, 2 It was confirmed that a pressing force of about 800 N is required when simultaneously pressing two coated core wires having a conductor core wire of 100 mm through two slots provided in one pressing member.

[0058] The inventors also conducted an experimental study on the force required to cut the coated core wire with a plate-shaped cutter. In this experiment, a plate-shaped cutter member having a cutter similar to the cutter 28 of the contact 20 was made from a copper alloy (C5191-H). The thickness of the base of the cutter member was 0.8 mm, the thickness of the cutter tip was 0.1 mm, and the angle of the tip was 30°. 2 The cutter member was pressed against a covered core wire having a seven-strand conductor core wire and an insulating coating, and the movement distance in the pressing direction and the pressing force required for the movement were measured.

[0059] Figure 13 shows the movement distance of the cutter member and the cross-sectional area of ​​the cutter 2 This is a graph showing the relationship between the pressing force when cutting two insulated core wires of a general cross-sectional area of ​​2 mm 2 It was confirmed that a pressing force of about 800 N is required to cut two coated wires having a conductor core with one cutter member.

[0060] The inventors also experimentally investigated the relationship between the ratio R of the distance (distance D in Figs. 8A and 9B) of the portion extending in a substantially straight line from the bent portion of the covered core wire to the front surface of the first plate-shaped insulation displacement portion of the contact to the outer diameter of the covered core wire in the insulation displacement connector device 1 of the first embodiment, and the tensile strength of the covered core wire. In this experiment, several examples of the insulation displacement connector device described in the first embodiment, which have different ratios R, were created. Then, 2 When the insulation sheath is crimped with a core wire with an outer diameter of 3.3 mm, the cross-sectional area of ​​the conductor core is 1.25 mm. 2 In each example, a tensile force was applied to the insulated core wire to examine its tensile strength. 2 15 shows a graph of the tensile strength test results when a conductor core with an insulating coating having an outer diameter of 3.3 mm is crimped. 2 14 and 15 show graphs of tensile strength test results when a covered core wire with an insulating coating having an outer diameter of 2.2 mm is crimped. Each graph also shows the tensile strength of a crimp sleeve as a comparative example. As shown in Figs. 14 and 15, it was confirmed that a tensile strength equivalent to that of a crimp sleeve can be obtained when the ratio R of the distance (distance D in Figs. 8A and 9B) of the portion extending in a substantially straight line from the bent portion of the covered core wire to the front surface of the first plate-shaped crimping portion of the contact to the outer diameter of the covered core wire is 1.0 or more. Also, when the cross-sectional area of ​​the conductor core wire is 2 mm 2 When a core wire with an insulating coating having an outer diameter of 3.3 mm is pressure welded, if the ratio R exceeds 2.0, the tensile strength does not increase even if the ratio R increases, and the cross-sectional area of ​​the conductor core is 1.25 mm 2 However, when a coated core wire having an outer diameter of an insulating coating of 2.2 mm is pressure welded, it was confirmed that when the ratio R exceeds 1.5, the tensile strength does not increase even if the ratio R increases. Therefore, it was confirmed that the ratio R is preferably 1.0 to 2.0, and more preferably 1.0 to 1.5. [Explanation of symbols]

[0061] 1: Pressure connector device 10: Housing 20: Contact 21: Base 22: First plate-shaped pressure-welding portion 23: Second plate-shaped pressure-welded portion 24: First slot on one side 25: the other first slot 26: Second slot on one side 27: The other second slot 28: Cutter 60: Storage section 60A: Recess 60B: Partition plate 61A: One of the covered core wire insertion holes 61B: The other coated core wire insertion hole 62A: First pressure-welding guide hole 62B: Second pressure-welding guide hole 62C: Cutter guide hole 63: First holding part 63A: One guide tube 63B: The other guide tube 64: Second holding part 64A: One notch 64B: Other cutout 66: Plate part 67: Groove 68: Flap section 69: Engagement convex part 70: Lid 71: Board part 72: Front part 73: Rear part 73A: Upper rear surface 73B: Lower rear 74: Flap section 75: Engagement part 80: Holding part 100A: One coated core 100B: The other coated core wire 201: Pressure connector device 220: Contact 224: First base 226: Second base 260: Storage unit 290: Cutter section

Claims

1. A pressure-displacement connector device for connecting a pair of covered core wires extending from opposite sides, each of which includes a conductor core wire and an insulating cover surrounding the conductor core wire, Housing and a contact receivable within the housing; the housing has a covered core wire holding portion that bends the pair of covered core wires and holds them so as to extend toward the contact in a parallel state, the contact has a pair of first slots corresponding to each of the pair of bent and extending covered core wires, and is configured to press-contact portions of the pair of covered core wires extending in parallel so as to strip a portion of the insulating coating of the pair of covered core wires and electrically connect the corresponding conductor core wires in the first slots, The coated core wire holding portion is a first holding portion that holds a portion of the mating covered wire extending toward the contact; and a second holding portion that holds the portions of the pair of covered core wires that extend in opposite directions to each other. Pressure connector device.

2. The contact is a first insulation displacement portion having the pair of first slots formed therein; a second insulation displacement portion having a pair of second slots corresponding to the pair of covered wires, the second insulation displacement portion being spaced apart from the first insulation displacement portion; having 2. The insulation displacement connector assembly of claim 1.

3. The contact is The wire further includes a cutter provided on a tip side of the first slot of the pair of covered wires.

2. The insulation displacement connector assembly of claim 1.

4. the coated core wire holding portion is configured so that a ratio of a distance from a bent portion of the mating coated core wire to the contact with respect to an outer diameter of the coated core wire is 1 to 1.

5.

2. The insulation displacement connector assembly of claim 1.

5. A connection structure in which a pair of covered core wires each including a conductor core wire and an insulating cover surrounding the conductor core wire and extending from opposite sides to each other are connected by the insulation displacement connector device according to any one of claims 1 to 4, the pair of coated core wires extending from the opposite sides are bent and held by the coated core wire holding portion so as to extend in the same direction, a contact for holding each of the pair of covered core wires and electrically connecting the core wires of the pair of covered core wires, the contact being configured to connect the covered core wires to each other;

6. A method for connecting a pair of covered core wires, each of which includes a conductor core wire and an insulating cover surrounding the conductor core wire, extending from opposite sides of the pair of covered core wires, using an insulation displacement connector device, comprising the steps of: The insulation displacement connector device comprises: Housing and a contact receivable within the housing; The housing has a covered core wire holding portion, The contact has a pair of first slots corresponding to each of the pair of covered wires, pressing the contact with a jig to strip a portion of the insulating coating of the pair of covered core wires and crimp the parallel extending portions of the pair of covered core wires so as to be electrically connected to the conductor core wires in the first slots; bending the pair of coated core wires extending from opposite sides by the coated core wire holding portion and holding the coated core wires so as to extend in parallel toward the contact; Including, A method for connecting a covered core wire, wherein in the holding step, a first portion of the covered core wire holding portion holds portions of the pair of covered core wires extending toward the contact, and a second portion of the covered core wire holding portion holds portions of the pair of covered core wires extending in opposite directions.

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