Press-fit connector

Abstract

The present invention suppresses a degradation in connection reliability between a coated wire and a terminal fitting.　This press-fit connector (A) comprises: a terminal fitting (30) that has an insertion hole (40) and a press-fit groove (41) that are in communication with each other; and a movement restriction part (15) to which a coated wire (50) can abut. The coated wire (50) is inserted into the insertion hole (40). The press-fit groove (41) has a press-fit blade (42) that extends from the hole edge of the insertion hole (40), cuts an insulating coating (52) of the coated wire (50), and is press-fitted to a conductor (51) of the coated wire (50). In a state in which the press-fitting of the coated wire (50) to the terminal fitting (30) is complete, the coated wire (50) is restricted from moving toward the insertion hole (40) by abutting the movement restriction part (15).

Description

Press - fit connector

[0001] This disclosure relates to a press - fit connector.

[0002] Patent Document 1 discloses a press - fit terminal to which an electric wire is press - fitted. The press - fit terminal is formed with a slot having a press - fit blade and an insertion hole for guiding the electric wire into the slot. The insertion hole has an arc shape with a diameter larger than the outer diameter of the electric wire. When press - fitting the press - fit terminal and the electric wire, the electric wire is inserted into the insertion hole, and then the electric wire is moved into the slot, so that the coating of the electric wire is cut by the press - fit blade and the conductor is brought into contact with the press - fit blade.

[0003] Japanese Patent Application Laid - Open No. 2002 - 170603

[0004] In the press - fit terminal described in Patent Document 1, there is a risk that the press - fitted electric wire may be displaced toward the insertion - hole side. When the displaced electric wire reaches the insertion hole, the connection reliability between the conductor and the terminal fitting decreases.

[0005] The press - fit connector of this disclosure has been completed based on the above circumstances, and aims to suppress a decrease in connection reliability between a coated electric wire and a terminal fitting.

[0006] The press - fit connector of this disclosure includes: a terminal fitting having insertion holes and a press - fit groove communicating with each other; and a movement restricting portion against which the coated electric wire can abut. The coated electric wire is inserted into the insertion hole. The press - fit groove has a press - fit blade that extends from the hole edge of the insertion hole, cuts the insulating coating of the coated electric wire, and press - fits to the conductor of the coated electric wire. In a state where the press - fitting of the coated electric wire to the terminal fitting is completed, the movement of the coated electric wire toward the insertion - hole side is restricted by abutting against the movement restricting portion.

[0007] According to this disclosure, a decrease in connection reliability between a coated electric wire and a terminal fitting can be suppressed.

[0008] Figure 1 is a perspective view showing the insulated wire crimped to the crimp connector of Embodiment 1. Figure 2 is a perspective view of the housing. Figure 3 is a perspective view of the terminal fitting from diagonally above and behind. Figure 4 is a perspective view of the terminal fitting from diagonally below and in front. Figure 5 is a perspective view of the retainer. Figure 6 is a perspective view showing the terminal fitting mounted in the preset position relative to the housing. Figure 7 is a plan cross-sectional view showing the terminal fitting held in the preset position and the insulated wire inserted through the insertion hole. Figure 8 is a plan cross-sectional view showing the terminal fitting properly inserted into the terminal housing chamber and the crimping of the insulated wire to the terminal fitting completed.

[0009] [Description of Embodiments of the Disclosure] First, embodiments of the disclosure will be listed and described. Any combination of the following embodiments, insofar as they do not contradict each other, is also included as a form for carrying out the invention.

[0010] The crimp connector of this disclosure comprises (1) a terminal fitting having an insertion hole and a crimp groove communicating with each other, and a movement restricting part to which an insulated wire can be made contact, wherein an insulated wire is inserted through the insertion hole, and the crimp groove has a crimping blade that extends from the edge of the insertion hole to cut the insulating coating of the insulated wire and press it against the conductor of the insulated wire, and when the crimping of the insulated wire to the terminal fitting is completed, the movement of the insulated wire toward the insertion hole is restricted by contact with the movement restricting part. With this configuration, the crimped insulated wire does not move toward the insertion hole, so the connection state between the terminal fitting and the insulated wire is stable. That is, a decrease in connection reliability between the insulated wire and the terminal fitting can be suppressed.

[0011] (2) In (1), it is preferable that the device is provided with a housing into which the terminal fitting is inserted, and that the movement restricting portion is integrally formed with the housing. With this configuration, the number of parts can be reduced compared to when the movement restricting portion is formed as a separate part from the housing.

[0012] (3) In (2), it is preferable that the insertion hole is connected to the front end of the crimping groove, the housing has a terminal housing chamber into which the terminal fitting is inserted from the rear of the housing, and the movement restricting portion is located on the rear surface of the housing. When manufacturing the crimping connector, the insulated wire is passed through the insertion hole and the terminal fitting is inserted into the terminal housing chamber with the movement restricting portion facing the rear. During the insertion of the terminal fitting, the insulated wire, which is in contact with the movement restricting portion, is displaced relatively backward within the crimping groove, causing the insulation coating of the insulated wire to be cut by the crimping blade, and the conductor of the insulated wire to be connected to the crimping blade. With this crimping connector, the process of inserting the terminal fitting into the terminal housing chamber and the process of crimping the terminal fitting and the insulated wire can be performed in one action, thus reducing the number of manufacturing steps.

[0013] (4) In (3), it is preferable that the movement restricting portion has an arc-shaped pressure receiving surface along the outer surface of the insulated wire. With this configuration, displacement of the insulated wire in the width direction intersecting the insertion direction of the terminal fitting into the terminal housing chamber can be suppressed.

[0014] (5) In (3) to (4), it is preferable that the terminal fitting has a stopper formed therein that closes the rear end of the crimping groove. With this configuration, it is possible to prevent the crimped insulated wire from coming off the crimping groove to the rear.

[0015] In (6) and (5), when the terminal fitting is properly inserted and the crimp contact between the terminal fitting and the insulated wire is completed, it is preferable that the conductor of the insulated wire is in contact with the stopper or is in close proximity to and facing the stopper. With this configuration, the forward and backward displacement of the insulated wire after crimp contact can be prevented or suppressed by the stopper and the movement restricting part.

[0016] In (7) and (6), when the terminal fitting is viewed in the axial direction of the insulated wire, it is preferable that the stopper has an arc shape along the outer surface of the conductor. With this configuration, deformation of the conductor can be suppressed when the insulated wire is pulled backward.

[0017] [Details of Embodiments of the Disclosure] [Example 1] An example of the crimp connector A embodying the present disclosure will be described with reference to Figures 1 to 8. The present invention is not limited to these examples, but is shown by the claims, and all modifications within the meaning and scope of the equivalents of the claims are included. In this example 1, the front-to-back direction is defined as direction F in Figures 1 to 8. The up-and-down direction is defined as direction H in Figures 1 to 6. The left-to-right direction is defined as direction R in Figures 1 to 8. In the following description, the left-to-right direction and the width direction are synonymous. The axial direction and the up-and-down direction of the insulated wire 50 are synonymous. The plan view of the crimp connector A from above and the axial view of the insulated wire 50 in the axial direction are synonymous.

[0018] The press-fit connector A of this embodiment 1 is constructed by assembling a housing 10 with a plurality of terminal fittings 30. Multiple insulated wires 50 are press-fitted into the press-fit connector A. The insulated wires 50 are conductive paths of a well-known form in which a conductor 51 is surrounded by an insulating coating 52. In a cross-section obtained by cutting the insulated wire 50 perpendicular to its length, the conductor 51 is circular in shape, and the outer surface of the insulating coating 52 is circular in shape concentric with the conductor 51. The insulated wires 50 are press-fitted into the terminal fittings 30 with their axes oriented in the vertical direction.

[0019] The housing 10 is constructed by assembling a terminal housing member 11 made of synthetic resin and a retainer 20 made of synthetic resin. Inside the terminal housing member 11, a plurality of terminal housing chambers 12 for housing terminal fittings 30 are formed (see Figures 7 and 8). The plurality of terminal housing chambers 12 are divided into, for example, two upper and lower tiers, and arranged in the left-right direction in each tier. The terminal housing chambers 12 are elongated spaces in the front-to-back direction. Stepped primary locking portions 13 are formed on the inner wall surface of the terminal housing chambers 12. The rear end of the terminal housing chamber 12 opens as a terminal insertion opening 14 on the rear surface 10R of the housing 10 (terminal housing member 11).

[0020] Multiple movement restricting portions 15 are formed on the rear surface 10R of the terminal housing member 11. The movement restricting portions 15 are arranged, for example, near the upper and lower positions of each terminal insertion opening 14. That is, when viewed from the rear, the movement restricting portions 15 are arranged on both sides in the vertical direction of each terminal insertion opening 14. When viewed from the rear, the movement restricting portions 15 have a portion that is provided along the opening edge of the terminal housing chamber 12 near the opening edge of the terminal housing chamber 12 on the rear surface 10R. The movement restricting portions 15 are, for example, plate-shaped with their thickness direction oriented vertically and protruding rearward from the rear surface 10R of the terminal housing member 11. The movement restricting portions 15 have a pressure-receiving surface 16 formed at their rear end face, which is recessed. In plan view, the pressure-receiving surface 16 has a semi-circular arc shape. The radius of curvature of the pressure-receiving surface 16 is set to be the same as, or slightly larger than, the radius of curvature of the outer surface of the insulated wire 50 (insulating coating 52).

[0021] The terminal housing member 11 has mounting holes 17 for attaching the retainer 20. The mounting holes 17 open in a vertically elongated slit shape on the side surface of the terminal housing member 11. The mounting holes 17 communicate with a plurality of terminal housing chambers 12 at a position rearward from the primary locking portion 13.

[0022] As shown in Figure 5, the retainer 20 is a single component having a rectangular frame portion 21 and a pair of upper and lower locking arms 22. The retainer 20 is inserted into the mounting hole 17. The retainer 20 is held in a temporary locking position (see Figure 7) and a permanent locking position (see Figure 8) with respect to the terminal housing member 11 within the mounting hole 17 by engaging the locking arms 22 with locking portions (not shown) within the mounting hole 17. Multiple secondary locking portions 25 are formed on the upper edge portion 23 and lower edge portion 24 that constitute the frame portion 21, and they protrude upward. A holding portion 26 is formed on the side surface of each secondary locking portion 25. The holding portion 26 has a cantilevered shape that protrudes diagonally forward and is elastically deformable in the left-right direction.

[0023] The terminal fitting 30 is a single, elongated component in the front-to-back direction. The terminal fitting 30 has a rectangular tubular terminal body portion 31, a connecting portion 32, and a rectangular tubular pressure contact portion 33. The terminal body portion 31 constitutes the front end portion of the terminal fitting 30, and the pressure contact portion 33 constitutes the rear end portion of the terminal fitting 30. The connecting portion 32 is the portion that connects the rear end of the terminal body portion 31 and the front end of the pressure contact portion 33.

[0024] The terminal body portion 31 has a plate-shaped lance 34 that extends diagonally backward from the outer surface of the terminal body portion 31 in a cantilevered manner. The lance 34 is elastically deformable in the left-right direction. On the outer surface of the terminal body portion 31 opposite to the lance 34, a preset locking portion 35 with a stepped recessed shape is formed. At the boundary between the front end of the pressure contact portion 33 and the connecting portion 32, a retaining locking portion 36 with a stepped recessed shape is formed.

[0025] The upper plate portion 37 and the lower plate portion 38 that constitute the pressure contact portion 33 each have through holes 40 formed therein. The through holes 40 are used to insert the insulated wire 50 in a direction intersecting the insertion direction of the terminal fitting 30 into the terminal housing chamber 12. The through holes 40 penetrate the upper plate portion 37 and the lower plate portion 38 in the vertical direction. In a plan view, the shape, size, and arrangement of the through holes 40 formed in the upper plate portion 37 are the same as those formed in the lower plate portion 38. The plan view shape of the through holes 40 is circular. The inner diameter of the through holes 40 is the same as, or slightly larger than, the outer diameter of the insulated wire 50.

[0026] The upper plate portion 37 and the lower plate portion 38 each have a pressure contact groove 41 that extends rearward from the insertion hole 40. The pressure contact groove 41 penetrates the upper plate portion 37 and the lower plate portion 38 in the vertical direction. In a plan view, the shape, size, and arrangement of the pressure contact groove 41 formed in the upper plate portion 37 are the same as those formed in the lower plate portion 38. In plan view, the shape of the pressure contact groove 41 is, for example, a constant width and an elongated shape that extends in the front-to-back direction. The left and right opening edges of the pressure contact groove 41 function as a pair of pressure contact blades 42. The groove width of the pressure contact groove 41 (the distance between the opposing pairs of pressure contact blades 42) is set to be smaller than the insertion hole 40 and slightly smaller than the outer diameter of the conductor 51 of the insulated wire 50.

[0027] A stopper 43 is formed on the upper plate portion 37 and the lower plate portion 38, respectively. The stopper 43 is the part that closes the rear end of the pressure contact groove 41. The plan view shape of the stopper 43 is, for example, a semicircle. The stopper 43 is in the shape of an arc along the outer surface of the conductor 51. The stopper 43 is connected tangentially to the rear end of the pressure contact blade 42. Therefore, the radius of curvature of the stopper 43 is set to a dimension slightly smaller than the radius in the cross-section of the conductor 51.

[0028] Next, the assembly procedure for the crimp connector A will be described. First, the retainer 20 is inserted into the mounting hole 17 of the terminal housing member 11, and the retainer 20 is held in a temporary locking position relative to the terminal housing member 11. When the retainer 20 is in the temporary locking position, as shown in Figure 7, the secondary locking portion 25 is located outside the terminal housing chamber 12, and the extended end of the holding portion 26 is extended into the terminal housing chamber 12. Next, the terminal fitting 30 is inserted into the terminal housing chamber 12 from the rear of the housing 10. During the insertion of the terminal fitting 30, the holding portion 26 is elastically deformed due to interference with the outer surface of the terminal body portion 31, and the extended end of the holding portion 26 slides against the outer surface of the terminal body portion 31. Similarly, during the insertion of the terminal fitting 30, the lance 34 slides against the inner wall surface of the terminal housing chamber 12 in an elastically deformed state.

[0029] When the terminal fitting 30 reaches the preset position, the holding portion 26 elastically returns to its original position, and the extended end of the holding portion 26 engages with the preset locking portion 35. This engagement holds the terminal fitting 30 in the preset position. When the terminal fitting 30 is in the preset position, as shown in Figures 6 and 7, the pressure contact portion 33 of the terminal fitting 30 protrudes outward from the rear of the terminal housing chamber 12, and the insertion hole 40 and the pressure contact groove 41 are located behind the rear surface 10R of the housing 10. As shown in Figure 7, in a plan view, the circular insertion hole 40 and the semicircular pressure receiving surface 16 of the movement restricting portion 15 are arranged concentrically.

[0030] With the terminal fitting 30 temporarily held in a preset position, each insulated wire 50 is inserted through the pair of upper and lower insertion holes 40. After inserting the insulated wires 50 through the insertion holes 40, the terminal fitting 30 is pushed forward to advance its insertion into the terminal housing chamber 12. During the insertion of the terminal fitting 30, the insulated wires 50 are in contact with the pair of upper and lower movement restricting parts 15 (pressure receiving surfaces 16) from behind, so even if the terminal fitting 30 moves forward, the insulated wires 50 do not move forward, and the insulated wires 50 move backward relative to the terminal fitting 30. Therefore, as the insertion of the terminal fitting 30 progresses, the insulated wires 50 move from the insertion holes 40 into the pair of upper and lower pressure contact grooves 41, and as they move within the pressure contact grooves 41, the insulating coating 52 is cut by the two pairs of upper and lower pressure contact blades 42, and the conductor 51 comes into contact with the pressure contact blades 42.

[0031] When the terminal fitting 30 reaches the insertion completion position, the lance 34 elastically returns and engages with the primary locking portion 13. The engagement between the lance 34 and the primary locking portion 13 prevents the terminal fitting 30 from coming loose. After all the terminal fittings 30 are held in the insertion completion position, the retainer 20, which is in the temporary locking position, is pushed to the permanent locking position. When the retainer 20 reaches the permanent locking position, the secondary locking portion 25 of the retainer 20 engages with the anti-dislodgement locking portion 36 of the terminal fitting 30. As a result, the terminal fitting 30 is prevented from moving relative to the terminal housing member 11 in the front-rear direction by the retainer 20. The primary locking action by the engagement between the lance 34 and the primary locking portion 13, and the secondary locking action by the anti-dislodgement locking portion 36 and the secondary locking portion 25, hold the terminal fitting 30 in a state where it cannot come loose at the insertion completion position.

[0032] When the terminal fitting 30 reaches the insertion completion position, the conductor 51 of the insulated wire 50 reaches the rear end of the crimping groove 41 (crimping blade 42), and the crimping of the insulated wire 50 to the terminal fitting 30 is completed. Once the crimping is complete, the conductor 51 is in a state where it is approaching the pair of upper and lower stoppers 43 from the front, or in a state where it is in contact with the pair of upper and lower stoppers 43 from the front. Above and below the stoppers 43, the insulating coating 52 of the insulated wire 50 is maintained in a state where it is in contact with the pair of upper and lower movement restricting parts 15 (pressure receiving surface 16) from the rear. Therefore, one insulated wire 50 is held in a state where it is sandwiched in the front-rear direction between the pair of movement restricting parts 15 and the pair of stoppers 43. As a result, the process of inserting the terminal fitting 30 into the housing 10 and the process of crimping the insulated wire 50 to the terminal fitting 30 are completed simultaneously.

[0033] The crimp connector A of this embodiment 1 comprises a terminal fitting 30 having an insertion hole 40 and a crimp groove 41 that communicate with each other, and a movement restricting part 15 to which a covered wire 50 can abut. The covered wire 50 is inserted through the insertion hole 40. The crimp groove 41 has a crimping blade 42 that extends from the edge of the insertion hole 40, cuts the insulating coating 52 of the covered wire 50, and crimps it onto the conductor 51 of the covered wire 50. When the crimping of the covered wire 50 to the terminal fitting 30 is completed, the movement of the covered wire 50 toward the insertion hole 40 is restricted by abutting the movement restricting part 15. With this configuration, the crimped covered wire 50 does not move toward the insertion hole 40, so the connection state between the terminal fitting 30 and the covered wire 50 is stable. That is, a decrease in connection reliability between the covered wire 50 and the terminal fitting 30 can be suppressed.

[0034] The press-fit connector A of this embodiment 1 includes a housing 10 into which the terminal fitting 30 is inserted. The movement restricting portion 15 is integrally formed with the housing 10. With this configuration, the number of parts can be reduced compared to when the movement restricting portion 15 is formed as a separate part from the housing 10.

[0035] The insertion hole 40 is connected to the front end of the pressure contact groove 41, the housing 10 has a terminal housing chamber 12 into which the terminal fitting 30 is inserted from the rear of the housing 10, and the movement restricting portion 15 is located on the rear surface 10R of the housing 10.

[0036] When manufacturing the crimp connector A, the insulated wire 50 inserted through the insertion hole 40 is positioned facing the movement restricting portion 15 from the rear, and the terminal fitting 30 is inserted into the terminal housing chamber 12. During the insertion process of the terminal fitting 30, the insulated wire 50, which is in contact with the movement restricting portion 15, is displaced relatively backward within the crimp groove 41, causing the insulating coating 52 of the insulated wire 50 to be cut by the crimp blade 42, and the conductor 51 of the insulated wire 50 to be connected to the crimp blade 42. According to the crimp connector A of this embodiment 1, the process of inserting the terminal fitting 30 into the terminal housing chamber 12 and the process of crimping the terminal fitting 30 and the insulated wire 50 can be performed in a single action, thus reducing the number of manufacturing steps. As described above, the movement restricting section 15 not only prevents the crimped insulated wire 50 from moving into the insertion hole 40, but also has the function of enabling the insertion of the terminal fitting 30 into the terminal housing chamber 12 and the crimping of the insulated wire 50 into the terminal fitting 30 to be performed in a single action.

[0037] The movement restricting section 15 has an arc-shaped pressure receiving surface 16 that is aligned with the outer surface of the insulated wire 50 (insulating coating 52). With this configuration, displacement of the insulated wire 50 in the width direction intersecting the insertion direction of the terminal fitting 30 into the terminal housing chamber 12 can be suppressed.

[0038] The terminal fitting 30 has a stopper 43 formed therein that closes the rear end of the crimping groove 41. With this configuration, it is possible to prevent the crimped insulated wire 50 from coming loose from the crimping groove 41 to the rear.

[0039] When the terminal fitting 30 reaches the insertion completion position in the terminal housing chamber 12 and is properly inserted, and the crimp contact between the terminal fitting 30 and the insulated wire 50 is completed, the conductor 51 of the insulated wire 50 is in contact with or close to the stopper 43. With this configuration, the forward and backward displacement of the insulated wire 50 after crimp contact can be prevented or suppressed by the stopper 43 and the movement restricting part 15.

[0040] In an axial view of the terminal fitting 30 along the axis of the insulated wire 50, the stopper 43 has an arc shape that follows the outer surface of the conductor 51. With this configuration, deformation of the conductor 51 can be suppressed when the insulated wire 50 is pulled backward.

[0041] The terminal fitting 30 is movable relative to the housing 10 between a preset position in which the insertion hole 40 is positioned outside the housing 10 and a completed crimping position in which it is properly inserted into the terminal housing chamber 12 and crimping with the insulated wire 50 is completed. Preferably, the housing 10 is provided with a holding part 26 for holding the terminal fitting 30 in the preset position. With this configuration, when performing manual maintenance, the stroke of the insulated wire 50 from the position in which it is inserted into the insertion hole 40 to the position in which crimping with the crimping blade 42 is completed can be controlled to be a constant dimension.

[0042] The housing 10 is comprised of a terminal housing member 11 having a terminal housing chamber 12 and a retainer 20. The retainer 20 is a component that prevents the terminal fitting 30 from being removed from the terminal housing chamber 12 by being attached to the terminal housing member 11. A holding portion 26 is formed on the retainer 20. With this configuration, the retainer 20 for preventing the terminal fitting 30 from being removed also has the function of holding the terminal fitting 30 in a preset position, so the number of parts can be reduced compared to a configuration in which a dedicated part with a holding portion 26 is provided. In addition, because the terminal fitting 30 can be held in a preset position by the holding portion 26 of the retainer 20, it is easy to insert the insulated wire 50 into the insertion hole 40.

[0043] [Other Embodiments] The present invention is not limited to the embodiments described above and drawn, but is shown in the claims. The present invention includes the meaning of equivalences to the claims and all modifications within the claims, and also includes the following embodiments. The movement restrictor may be formed as a separate component from the housing. The rear end of the crimp groove may be open to the rear of the terminal fitting. In axial view, the shape of the stopper may not be semicircular. The pressure-receiving surface of the movement restrictor may be flat, triangular, etc. The crimping of the insulated wire to the terminal fitting may be completed before the terminal fitting is inserted into the terminal housing chamber.

[0044] A...Crimping connector 10...Housing 10R...Rear surface of housing 11...Terminal housing member 12...Terminal housing chamber 13...Primary locking part 14...Terminal insertion opening 15...Movement restricting part 16...Pressure receiving surface 17...Mounting hole 20...Retainer 21...Frame part 22...Lock arm 23...Upper edge part 24...Lower edge part 25...Secondary locking part 26...Holding part 30...Terminal fitting 31...Terminal body part 32...Connecting part 33...Crimping part 34...Lance 35...Preset locking part 36...Retaining locking part 37...Upper plate part 38...Lower plate part 40...Through hole 41...Crimping groove 42...Crimping blade 43...Stopper 50...Insulated wire 51...Conductor 52...Insulation coating

Claims

1. A crimp connector comprising: a terminal fitting having mutually communicating through-holes and crimp grooves; and a movement restricting portion to which an insulated wire can be made contact, wherein the insulated wire is inserted through the through-holes; the crimp grooves have crimp blades extending from the edge of the through-holes to cut the insulating coating of the insulated wire and make crimp contact with the conductor of the insulated wire; and when the crimp contact of the insulated wire with the terminal fittings is completed, the movement of the insulated wire toward the insertion-hole side is restricted by contact with the movement restricting portion.

2. The crimp connector according to claim 1, comprising a housing into which the terminal fitting is inserted, wherein the movement restricting portion is integrally formed with the housing.

3. The press-fit connector according to claim 2, wherein the insertion hole is connected to the front end of the press-fit groove, the housing has a terminal housing chamber into which the terminal fitting is inserted from the rear of the housing, and the movement restricting portion is located on the rear surface of the housing.

4. The pressure-receiving connector according to claim 3, wherein the movement restricting portion has an arc-shaped pressure-receiving surface along the outer surface of the insulated wire.

5. The pressure-fitting connector according to claim 3 or claim 4, wherein the terminal fitting has a stopper formed therein that closes the rear end of the pressure-fitting groove.

6. The crimp connector according to claim 5, wherein when the terminal fitting is properly inserted and the crimp contact between the terminal fitting and the insulated wire is completed, the conductor of the insulated wire is in contact with the stopper or is in close proximity to and facing the stopper.

7. The crimp connector according to claim 6, wherein, in an axial view of the terminal fitting viewed in the axial direction of the insulated wire, the stopper has an arc shape along the outer surface of the conductor.

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