Crimping contact and crimping connector device

Abstract

To provide a contact for crimping an insulated core wire having a twisted conductor core wire, which has strong gripping force with little variation in gripping force.SOLUTION: A crimping contact includes a crimping contact 30 for crimping an insulated core wire having a conductor core wire formed by twisting a number of single wires together and an insulating coating that covers the conductor core wire, and a slit 31 into which the insulated core wire is introduced. At both edges defining the slit 31, a core wire guide portion 32 is formed at the open end and its width widens outward, and a curved recess 34 is formed with a curved shape that is concave on both sides.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an insulation displacement contact and an insulation displacement connector device. [Background technology]

[0002] IDC connectors (Insulation Displacement Connectors) are widely used as a method for connecting an insulated core wire, which includes a conductor core wire and an insulating coating covering the conductor core wire, to a terminal, or as a method for connecting such insulated core wires together (see, for example, Patent Documents 1 to 3). The IDC connector has a contact with a U-shaped slit. By pressing the contact so that the insulated core wire enters the slit, the insulating coating is stripped off and the conductor core wire is held in the slot of the contact. As a result, the insulated core wire is held in the contact, and the conductor core wire of the insulated core wire is electrically connected to the contact. As such contacts, contacts in which both edges of the slit are formed in various shapes are known, as described in Patent Documents 1 to 3. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-172623 [Patent Document 2] Japanese Utility Model Application Publication No. 56-112876 [Patent Document 3] Japanese Patent Application Publication No. 56-7364 Summary of the Invention [Problem to be solved by the invention]

[0004] There are two types of insulated core wires: those with a solid conductor core and those with a twisted conductor core, both of which are used in the field of communications. When the conductor core is twisted, even conventional contacts with slits may not provide sufficient gripping force, or the gripping force may vary, making it difficult to reliably obtain the desired gripping force.

[0005] The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a contact for crimping an insulated core wire having a stranded conductor core, which has little variation in gripping force and can obtain a desired gripping force. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided an insulation displacement contact for pressure welding an insulated core wire having a conductor core wire formed by twisting a plurality of single wires together and an insulating coating that covers the conductor core wire, characterized in that the insulation displacement contact has a slit into which the insulated core wire is introduced, and on both edges defining the slit, a core wire guide portion formed at the open end and expanding in width toward the outside, and a curved recess having a curved shape that is concave toward both sides are formed. According to the above aspect, when the insulated core wire is pressure-welded by the contact, the conductor core wire, which is formed by twisting a plurality of single wires, is guided into the slit by the core wire guide portion and disposed in the curved recess having a curved shape concave toward both sides. Therefore, the conductor core wire is disposed in the slit while maintaining its cross-sectional shape. Furthermore, since the curved recess that accommodates the conductor core wire is formed in a curved shape, the conductor core wire is held in the slit while maintaining its cross-sectional shape. This allows the contact to exert a sufficient holding force and suppresses variation in the holding force.

[0007] According to one aspect of the present invention, linear portions extending linearly are further formed between the core wire guide portions and the curved recesses on both edges that define the slit. According to the above aspect, since the straight portion is provided between the core wire guide portion and the curved recess, sharp corners can be prevented from being formed on the edge of the slit, thereby suppressing damage to the conductor core wire and deformation of the cross-sectional shape.

[0008] According to one aspect of the present invention, the curved recess is recessed toward both sides by 0.15 to 0.25 mm. According to the above aspect, the cross-sectional area of ​​the 2 mm 2 The conductor core of the insulated core can be gripped while maintaining its cross-sectional shape.

[0009] According to one aspect of the present invention, the length of the curved recess in the direction in which the slits extend is approximately equal to the distance between the maximum number of contact points of the outer single core that contact half of the circumscribing circle of the conductor core. According to the above-described aspect, since the multiple single-core wires are gripped in a state of abutting against the curved recess, the cross-sectional shape of the conductor core wire is maintained.

[0010] According to one aspect of the present invention, the core wire guide portions on both edges are tapered, and the angle of the tapered portions is 70 to 90 degrees. The core wire guide cuts the insulating coating and guides the conductor core wire to the center of the slit. If the angle of the tapered portion is too large, a large force acts on the conductor core wire during pressure welding, causing the cross-sectional shape and core wire arrangement to collapse or be cut. If the angle of the tapered portion is too small, the insulating coating cannot be cut or the conductor core wire cannot be guided. In contrast, according to the above embodiment, the conductor core wire can be reliably guided into the curved recess while maintaining the cross-sectional shape and arrangement of the conductor core wire.

[0011] According to one aspect of the present invention, there is provided an insulation displacement connector device for connecting an insulated core wire having a conductor core wire formed by twisting a plurality of single wires together and an insulating coating that covers the conductor core wire, the insulation displacement connector device including a contact and a housing that accommodates the contact, the contact having a slit into which the insulated core wire is introduced, and on both edges defining the slit, a core wire guide portion formed at the open end and expanding in width toward the outside, and a curved recess having a curved shape that is concave toward both sides are formed. Effect of the Invention

[0012] According to the present invention, there is provided a contact for crimping an insulated core wire having a stranded conductor core, which has little variation in gripping force and can obtain a desired gripping force. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of an insulation displacement connector device according to an embodiment of the present invention, showing a state in which one insulated core wire is attached; [Diagram 2] 1 is a perspective view of an insulation displacement connector device according to an embodiment of the present invention, showing a state in which a pair of insulated core wires are attached; [Diagram 3] 1 is a longitudinal sectional view showing an insulation displacement connector device according to an embodiment of the present invention; [Figure 4] 1 is a cross-sectional view of an insulation displacement connector device according to one embodiment of the present invention; [Diagram 5] 1A and 1B are diagrams illustrating contact shapes according to an embodiment of the present invention. [Figure 6] 13 is a diagram for explaining a method for determining the length of the curved recess of the contact in the extending direction of the slit. FIG. [Figure 7] 1 is a graph showing the measurement results of the tensile strength of the stranded wire in Experiment 1. [Figure 8] 1 is a graph showing the gripping force of each contact sample and the width of the contact after crimping the insulated wire. [Figure 9A]11 is a photograph showing the shape of the contact and the shape of the conductor core of Sample 1 after pressure welding of the insulated core wire in Experiment 2. [Figure 9B] 13 is a photograph showing the shape of the contact and the shape of the conductor core of Sample 2 after pressure welding of the insulated core wire in Experiment 2. [Figure 10A] FIG. 13 shows a contact used in Experiment 3, in which the open end of the slit is rounded. [Figure 10B] FIG. 13 is a diagram showing a contact used in Experiment 3, in which the open end of the slit is tapered. [Figure 11] 13 is a graph showing the number of effective core wire contacts and gripping force in Experiment 3. [Figure 12] 13 is a diagram showing the arrangement of conductor core wires immediately adjacent to a contact after pressure welding in a contact having a tapered opening end in Experiment 3. FIG. [Figure 13] FIG. 13 is a diagram showing the arrangement of conductor core wires immediately adjacent to a contact after pressure welding in a contact having an R-shaped opening end in Experiment 3. [Figure 14A] FIG. 13 is a diagram showing the shape of the contact of Sample 1 used in Experiment 4. [Figure 14B] FIG. 13 is a diagram showing the shape of the contact of Sample 2 used in Experiment 4. [Figure 14C] FIG. 13 is a diagram showing the shape of the contact of Sample 3 used in Experiment 4. [Figure 15A] 13 is a diagram showing the cross sections and arrangement of the contacts and conductor core wires of Sample 1 after pressure welding in Experiment 4. FIG. [Figure 15B] FIG. 13 is a diagram showing the cross sections and arrangement of the contacts and conductor core wires of Sample 2 after pressure welding in Experiment 45. [Figure 15C] 13 is a diagram showing the cross sections and arrangement of the contacts and conductor core wires of Sample 3 after pressure welding in Experiment 4. FIG. [Figure 16] 13 is a graph showing the gripping force of each sample in Experiment 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an insulation displacement connector device and insulation displacement contacts according to the present invention will now be described in detail with reference to the drawings. 1 to 4 show a pressure-displacement connector device according to an embodiment of the present invention, in which Figs. 1 and 2 are perspective views, Fig. 3 is a vertical cross-sectional view, and Fig. 4 is a horizontal cross-sectional view. Fig. 1 shows a state in which one insulated core wire is attached, and Fig. 2 shows a state in which a pair of insulated core wires is attached. The pressure-displacement connector device 1 of this embodiment is for connecting a pair of insulated core wires 100A and 100B to each other and electrically connecting the conductor core wires of the insulated core wires 100A and 100B. The insulated core wires 100A and 100B are each made of a twisted wire formed by twisting conductor core wires, and are formed by covering the twisted wires with an insulating coating. As shown in Figs. 1 to 3, the insulated core wires 100A and 100B extend linearly, and the connection side ends face each other. Terminals 110A and 110B are attached to the connection side ends of the insulated core wires 100A and 100B, respectively.

[0015] The insulation displacement connector device 1 of this embodiment comprises a housing 10 and an insulation displacement fitting 20. The housing 10 is open at the top, and has an accommodating portion 11 formed therein that can receive a pair of terminals 110A, 110B.

[0016] The insulation displacement fitting 20 has a pair of first contacts 22A, 22B, a pair of second contacts 23A, 23B, and a pair of third contacts 24A, 24B arranged from the inside to the outside. The first contact 22A, the second contact 23A, and the third contact 24A are for crimping one insulated core wire 100A, and are arranged in parallel at equal intervals at the end of the one insulated core wire 100A side. The first contact 22B, the second contact 23B, and the third contact 24B are for crimping the other insulated core wire 100B, and are arranged in parallel at equal intervals at the end of the other insulated core wire 100B side. The insulation displacement fitting 20 and the contacts that constitute it are formed from a conductive metal plate such as copper, brass, or phosphor bronze.

[0017] The first contact 22A on one side and the first contact 22B on the other side are connected by a plate-shaped base 25. The base 25 is a plate-shaped portion extending along the bottom of the housing 10. The first contact 22A on one side and the second contact 23A on one side are connected by the first connection portion 26A on one side. The first connection portion 26A on one side is a plate-shaped portion extending between the first contact 22A on one side and the lower portion of the second contact 23A on one side. The first contact 22B on the other side and the second contact 23B on the other side are connected by the first connection portion 26B on the other side. The first connection portion 26B on the other side is a plate-shaped portion extending between the first contact 22B on one side and the lower portion of the second contact 23B on one side.

[0018] The second contact 23A on one side and the third contact 24A on one side are connected by the second connection portion 27A on one side. The second connection portion 27A on one side is a plate-shaped portion extending along the bottom of the housing 10 between the lower edges of the second contact 23A on one side and the third contact 24A on one side. The second contact 23B on the other side and the third contact 24B on the other side are connected by the second connection portion 27B on the other side. The second connection portion 27B on the other side is a plate-shaped portion extending along the bottom of the housing between the lower edges of the second contact 23B on one side and the third contact 24B on the other side.

[0019] The first contacts 22A, 22B, the second contacts 23A, 23B, and the third contacts 24A, 24B are plate-like members of the same shape with slits. The first contacts 22A, 22B, the second contacts 23A, 23B, and the third contacts 24A, 24B are provided so that the slits open upward.

[0020] As shown in Fig. 1, when connecting the insulated core wires 100A and 100B, the terminal 110A attached to one of the insulated core wires 100A is pushed from above into the receiving portion 11 of the housing 10. As a result, the insulating coating of one of the insulated core wires 100A is stripped by one of the first contacts 22A, one of the second contacts 23A, and one of the third contacts 24A, and the conductor core wire is held in the slot of the contacts. As a result, one of the insulated core wires 100A is held by one of the first contacts 22A, one of the second contacts 23A, and one of the third contacts 24A, and the conductor core wire of one of the insulated core wires 100A is electrically connected to one of the first contacts 22A, one of the second contacts 23A, and one of the third contacts 24A.

[0021] Also, the terminal 110B attached to the other insulated core wire 100B is pushed from above into the accommodating portion 11 of the housing 10. As a result, the insulating coating of the other insulated core wire 100B is stripped by the other first contact 22B, the other second contact 23B, and the other third contact 24B, and the conductor core wire is gripped in the slot of the contact. As a result, the other insulated core wire 100B is held by the other first contact 22B, the other second contact 23B, and the other third contact 24B, and the conductor core wire of the other insulated core wire 100B is electrically connected to the other first contact 22B, the other second contact 23B, and the other third contact 24B.

[0022] Then, one insulated core wire 100A is pressure-welded by one first contact 22A, one second contact 23A, and one third contact 24A, and the other insulated core wire 100B is pressure-welded by the other first contact 22B, the other second contact 23B, and the other third contact 24B, thereby electrically connecting one insulated core wire 100A and the other insulated core wire 100B.

[0023] The following describes the shapes of the contacts 22A, 22B, 23A, 23B, 24A, and 24B of the insulation displacement connector apparatus 1. In the following description, the contacts will be denoted by the reference numeral 30, and this contact 30 corresponds to the contacts 22A, 22B, 23A, 23B, 24A, and 24B of the insulation displacement connector apparatus 1.

[0024] Fig. 5 is a diagram showing the shape of a contact according to one embodiment of the present invention. As shown in Fig. 5, contact 30 has a slit 31. Both edges defining slit 31 are shaped to be line-symmetrical with respect to the center line of slit 31 as the axis of symmetry.

[0025] Further, on both edges defining the slit 31, from the open end side toward the depth, there are formed a core wire guide portion 32, a first straight portion 33, a curved recess 34, and a second straight portion 35. The deepest portion 36 of the slit 31 is arc-shaped, and both edges are connected.

[0026] The core wire guide portions 32 are formed at the open ends of both edges of the slit 31. The core wire guide portions 32 are tapered so that the width between the both edges increases outward. That is, the core wire guide portions 32 on both edges are linearly slanted outwardly so as to move away from the central axis. The angle θ of the core wire guide parts 32 on both edges is preferably 70 to 90 degrees. That is, each core wire guide part 32 is formed at an angle of 30 to 45 degrees with respect to the central axis.

[0027] In this embodiment, the core wire guide portion 32 is formed with a taper, but is not limited to this. For example, the core wire guide portion may be curved (R-shaped). However, when the core wire guide portion 32 is tapered, the shape and arrangement of the conductor core wires can be more effectively maintained during pressure welding.

[0028] The first straight portion 33 is formed continuous with the core wire guide portion 32. The first straight portion 33 is formed in a straight line parallel to the central axis. By interposing this first straight portion 33 between the core wire guide portion 32 and the curved recess 34, sharp corners are not generated at the edge of the slit 31, and damage to the insulated core wire and the conductor core wire can be suppressed.

[0029] The curved recess 34 is formed in a curved shape that is concave toward both sides. Particularly, in this embodiment, the curved recess 34 is formed by a single arc-shaped recess. The center of this arc-shaped recess is located at the middle position in the depth direction. The length B of the curved recess 34 in the extending direction of the slit is approximately equal to the linear distance B' between the contact points B1 and B2 of the outer single core wire 210 that contact the half portion (the portion between A1 and A2) of the circumscribing circle C1 of the conductor core wire 200 in the maximum number of times as shown in FIG. 6. Here, approximately equal does not only mean the same, but also includes the case where the difference is about -AB1 from AB1, where AB1 is the midpoint between A1 and B1.

[0030] The depth X of the deepest part of the curved recess 34 relative to the first straight part 33 and the second straight part 35, which is determined by the intersection of the arc of the diameter calculated from the twisted wire arrangement in Fig. 6 with B1 and B2 for the slit width E set for a single core wire having the same diameter as the entire twisted wire, is 0.15 to 0.25 mm, and the distance D between the deepest parts of the paired curved recesses is 0.8 to 1.0 mm, which is expressed as D = E + 2X. That is, the curved recess 34 is recessed toward both sides by 0.15 to 0.25 mm. This dimension is one example for this twisted wire wiring, and is calculated each time depending on the number of twisted wires and the diameter of the single core wire.

[0031] The second straight portion 35 is formed continuously with the curved recess 34. The second straight portion 35 is formed in a straight line parallel to the central axis. The width of the first straight portion 33 and the width of the second straight portion 35 are equal.

[0032] According to this embodiment, the core wire guide portion 32 formed at the open end and widening outward, and the curved recess 34 curved and concave toward both sides are formed on both edges that define the slit 31. As a result, when the insulated core wires 100A, 100B are crimped by the contact 30, the conductor core wire formed by twisting a plurality of single wires is guided into the slit 31 by the core wire guide portion 32 and arranged in the curved recess 34 curved and concave toward both sides. Therefore, the conductor core wire is arranged in the slit 31 while maintaining its cross-sectional shape and arrangement. Furthermore, since the curved recess 34 that accommodates the conductor core wire is formed in a curved shape, the conductor core wire is held in the slit 31 while maintaining its cross-sectional shape and arrangement. As a result, the contact 30 can exert a sufficient gripping force and suppress the variation in the gripping force.

[0033] Furthermore, according to this embodiment, a first straight portion 33 extending linearly is further formed between the core wire guide portion 32 and the curved recess 34 on both edges that define the slit 31. In this manner, the first straight portion 33 is provided between the core wire guide portion 32 and the curved recess 34, thereby preventing sharp corners from being generated on the edges of the slit and suppressing damage to the conductor core wire and deformation of the cross-sectional shape.

[0034] According to this embodiment, the curved recess 34 is recessed toward both sides by 0.15 to 0.25 mm. 2 The conductor core wire of the insulated core wire can be held while maintaining the cross-sectional shape and arrangement. In addition, the shape of the curved recess can be calculated each time from the depth X of the curved recess, which is obtained by the intersection of B1, B2 and the arc of the diameter calculated from the twisted wire arrangement, as in Fig. 6, for the slit width E set for a single core wire having the same diameter as the entire twisted wire diameter.

[0035] According to this embodiment, the length of the curved recess 34 in the extending direction of the slit 31 is approximately equal to the distance between the maximum number of contact points of the outer single core wire that contacts half of the circumscribing circle of the conductor core wire. As a result, a large number of single-core wires are held in a state of abutment within the curved recess 34, so that the cross-sectional shape and arrangement of the conductor core wires are maintained.

[0036] According to this embodiment, the core wire guides 32 on both edges are tapered, and the taper angle is 70 to 90 degrees. The core wire guides 32 cut the insulating coating and guide the conductor core wire to the center of the slit. If the taper angle of the core wire guides is too large, a large force acts on the conductor core wire during pressure welding, causing the cross-sectional shape and arrangement to be distorted or cut. If the taper angle is too small, the insulating coating cannot be cut or the conductor core wire cannot be guided. In contrast, according to this embodiment, the insulating coating can be cut and the conductor core wire can be reliably guided to the curved recess 34 while maintaining the cross-sectional shape and arrangement of the conductor core wire.

[0037] Hereinafter, an experiment conducted by the inventors to optimize the shape of the slits in this embodiment will be described. (Experiment 1) First, the inventors measured the tensile strength of the twisted wire. 2 A seven-stranded wire was used. The twisted wire was held at two points and a load was applied to separate the held points. Figure 7 is a graph showing the measurement results of the tensile strength of the twisted wire in experiment 1. As shown in Figure 7, when the pulling speed was 10 mm / min and 50 mm / min, there was no variation in the tensile strength, which was approximately 400 N.

[0038] In addition, several contact samples were created with a slit width of 0.5 mm, plate thickness of 0.7 mm, and made of phosphorus bronze, and the gripping force was measured. Figure 8 is a graph showing the gripping force of each contact sample and the contact width after crimping the insulated core wire. The predicted gripping force and contact width areas are indicated by arrows in the figure. As shown in Figure 8, the gripping force of each contact was close to the prediction, with some variation occurring around 245 N.

[0039] (Experiment 2) In order to investigate the cause of this variation in gripping force, the inventors cut the insulated core wire at the slit surface position after crimping the insulated core wire for samples 1 and 2 of contacts having two slits, and checked the shape of the slit and the conductor core wire of the insulated core wire.

[0040] 9A and 9B are photographs showing the shapes of the contacts and the shapes of the conductor core wires of Samples 1 and 2, respectively, after the insulated core wires were crimped in Experiment 2. As shown in Figs. 9A and 9B, the degree of contact opening differs for each sample, and the state in which the conductor core wires are sandwiched and arranged also differs for each sample. In Sample 2, even with the same degree of contact opening, the state in which the core wires are sandwiched and arranged differs. For this reason, the inventors considered that keeping the state in which the conductor core wires are held and arranged constant would lead to a stable gripping force.

[0041] (Experiment 3) In order to study the slit shape that reduces the variation in gripping force, the inventors tested contacts with R-shaped and tapered slit openings, with a conductor core with a cross-sectional area of ​​2 mm 2 The insulated core wires were welded under pressure. Fig. 10A and Fig. 10B respectively show a contact with an R-shaped opening end of the slit and a contact with a tapered shape used in Experiment 3. As shown in Fig. 10A and Fig. 10B, in this experiment, an experiment was performed using a sample in which both edges of the slits 131 and 231 are parallel. As shown in Fig. 10A, the opening end 132 of one contact 130 is R-shaped, that is, formed in an arc shape. Also, as shown in Fig. 10B, the opening end 232 of the other contact 230 is formed in a tapered shape. The conductive core wires were welded under pressure by these contacts, and the cross-sectional shape and arrangement state of the conductor core wires in the slits were measured by non-destructive testing (CT scan), and the gripping force was measured. Furthermore, the number of single core wires (effective core wire contact number) that contacted the edge of the slit and maintained 70% or more of their shape was counted from the cross-sectional shape of the conductor core wire.

[0042] Fig. 11 is a graph showing the number of effective contact cords and the gripping force in experiment 3. As shown in Fig. 11, the gripping force tended to be proportional to the number of effective contact cords.

[0043] Fig. 12 is a diagram showing a cross section of the conductor core wire after pressure welding in a contact having a tapered opening end in Experiment 3. Fig. 13 is a diagram showing a cross section of the conductor core wire after pressure welding in a contact having an R-shaped opening end in Experiment 3. When the opening end is R-shaped as shown in Fig. 13, there is a large deformation in the cross section of the conductor core wire and a disturbance in the arrangement. In contrast, when the opening end is tapered as shown in Fig. 12, there is little deformation in the cross section of the conductor core wire and a disturbance in the arrangement.

[0044] (Experiment 4) In order to study the shape of the slit that would increase the number of effectively contacting core wires that come into contact with the edges of the slit, the inventors conducted a study by pressing the insulated core wires against samples in which recesses of different shapes were formed on both edges of the slit.

[0045] 14A, 14B, and 14C are diagrams showing the shapes of the contacts of Samples 1 to 3 used in Experiment 4. As shown in FIGS. 14A to 14C, the contact 330A of Sample 1 has one arc-shaped recess 334A formed therein, the contact 330B of Sample 2 has two arc-shaped recesses 334B formed therein, and the contact 330C of Sample 3 has three arc-shaped recesses 334C formed therein. The contacts of Samples 1 to 3 were examined. Sample 1 was examined when the distance between the deepest parts of the recesses (hole width) was 0.8 mm, 0.9 mm, and 1.0 mm, Sample 2 was examined when the distance between the deepest parts of the recesses was 0.8 mm and 0.9 mm, and Sample 3 was examined when the distance between the deepest parts of the recesses was 0.9 mm.

[0046] 15A to 15C are diagrams showing cross sections of the contacts and conductor core wires of Samples 1 to 3 after pressure welding, respectively, in Experiment 4. As shown in Fig. 15A to 15C, the cross-sectional shape of the conductor core wire made of a twisted wire was maintained to be approximately circular in Sample 1, whereas the shape of the conductor core wire was slightly deformed in Sample 2 and was more deformed in Sample 3.

[0047] Moreover, Fig. 16 is a graph showing the gripping force of each sample in Experiment 4. As shown in Fig. 16, the gripping force was the largest and had the smallest variation when there was one arc-shaped recess, the slit width was 0.5 mm, the plate thickness was 0.7 mm, the hole width was 1.0 mm, and the material was phosphor bronze. [Explanation of symbols]

[0048] 1: Pressure connector device 10: Housing 11: Storage section 20: Pressure welding fitting 22A: First contact on one side 22B: The other first contact 23A: Second contact on one side 23B: The other second contact 24A: Third contact on one side 24B: The other third contact 25: Base 26A: One of the first connection parts 26B: The other first connection part 27A: One of the second connection parts 27B: The other second connection part 30: Contact 31: Slit 32: Wire guide section 33: First straight section 34: Curved recess 35: Second straight section 36: The Deepest Part 100A, 100B: Insulated core wire 110A, 110B: Terminals

Claims

1. 1. A pressure-displacement contact for pressure-displacement of an insulated core wire having a conductor core wire formed by twisting a plurality of single-core wires and an insulating coating that covers the conductor core wire, A slit is provided through which the insulated core wire is introduced. On both edges defining the slit, a core wire guide portion formed at the open end portion and expanding outwardly; A curved recess having a curved shape that is concave toward both sides; 1. A pressure contact comprising:

2. 2. The insulation displacement contact according to claim 1, further comprising straight portions extending straight between said core wire guide portions and said curved recesses on both edges defining said slit.

3. The curved recess is recessed toward both sides by 0.15 to 0.25 mm.

2. The insulation displacement contact of claim 1.

4. a length of the curved recess in a direction in which the slit extends is substantially equal to a distance between the maximum number of contact points of the outer single core wire that contacts half of the circumscribing circle of the conductor core wire; 2. The insulation displacement contact of claim 1.

5. The core wire guide portions at both edges are tapered, and the angle of the tapered portion is 70 to 90 degrees.

2. The insulation displacement contact of claim 1.

6. 1. A pressure-displacement connector device for connecting an insulated core wire having a conductor core wire formed by twisting a plurality of single-core wires and an insulating coating that covers the conductor core wire, The connector includes a contact and a housing that receives the contact, The contact has a slit into which the insulated core wire is introduced, On both edges defining the slit, a core wire guide portion formed at the open end portion and expanding outwardly; A curved recess having a curved shape that is concave toward both sides; 13. An insulation displacement connector device, comprising:

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