Connector

Abstract

To provide a connector simply improving a transmission characteristic.SOLUTION: A connector 1 which is fitted to an electric wire 100 including pair cables 101 surrounded by a metallic braid 105 includes: a cylindrical sleeve 20 arranged on an outer periphery of the braid 105 exposed outside; and an outer terminal 40 as a shield terminal which has a braid crimp part 42 crimping one part where the sleeve 20 by the electric wire 100 is arranged. The sleeve 20 has a plurality of caulking pieces 22 at a front end part 21e to be an end closer to the terminal of the pair cables 101 in an axial direction. When the sleeve 20 is arranged on the outer periphery of the braid 105, an end part 105a of the braid 105 is folded at the caulking pieces 22 and covers an outer periphery 21f of the sleeve 20; after the end part 105a of the braid 105 covers the outer periphery 21f of the sleeve 20, a plurality of caulking pieces 22 is folded in a direction approaching the pair cables 101.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a connector. [Background technology]

[0002] Conventionally, there are connectors for high-speed communication that are attached to electric wires such as twisted pair electric wires that include pair wires surrounded by a metal braid. For example, in a twisted pair electric wire, the cross-sectional shape of the outer circumference of the entire pair wire is elliptical, but the cross-sectional shape of the braid surrounding the pair wire is often annular, following the outer circumference shape of the twisted pair electric wire. In this case, when focusing on one of the two wires that make up the pair wire, the distance between the core wire and the braid differs between the direction in which the two wires are lined up and the direction perpendicular to the said direction, which may result in impedance mismatch and a deterioration in the transmission characteristics in high-speed communication.

[0003] In response to this, Patent Document 1 discloses a technology relating to a crimp ferrule attached to an electric wire such as a twisted pair electric wire. The crimp ferrule is a member that can function as an inner sleeve, which is one component of a connector, and has a pair of parallel tongues at the front end that can crimp a part with a non-circular cross section. The pair of tongues can be advantageous for impedance matching because the braid can be arranged on the outer periphery of the entire pair wire in accordance with the outer periphery shape of the entire elliptical pair wire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-8874 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the crimping ferrule disclosed in Patent Document 1, the pair of tongues must press the braid in accordance with the outer peripheral shape of the entire pair wire, so the orientation of the ellipse, which is the outer peripheral shape of the entire pair wire, must be known in advance before crimping. Therefore, in order to specify the orientation of the ellipse of the entire pair wire, the facility where crimping is performed requires a camera or the like for recognizing the orientation or position of the entire pair wire, which may lead to an increase in facility costs.

[0006] The present invention has been made in view of the problems inherent in the conventional technology, and an object of the present invention is to provide a connector that can easily improve transmission characteristics. [Means for solving the problem]

[0007] One aspect of the present invention is a connector that is attached to an electric wire including a pair wire surrounded by a metal braid, and includes a tubular sleeve that is placed on the outer periphery of the braid exposed to the outside, and a shielded terminal having a braid crimping portion that crimps a portion of the electric wire where the sleeve is placed, the sleeve has a plurality of crimping pieces at a front end that is the end axially closer to the terminal of the pair wire, and when the sleeve is placed on the outer periphery of the braid, the tip of the braid is folded back by the crimping pieces to cover the outer periphery of the sleeve, and after the tip of the braid has covered the outer periphery of the sleeve, the multiple crimping pieces are folded in a direction approaching the pair wire. Effect of the Invention

[0008] According to the present invention, it is possible to provide a connector that can easily improve transmission characteristics. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a connector according to one embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of a connector assembly in a connector according to one embodiment. [Diagram 3] 3 is a cross-sectional view of the connector assembly corresponding to the section III-III in FIG. 1. [Figure 4A]FIG. 4 is a perspective view of the sleeve before the crimping pieces are bent. [Figure 4B] 11 is a perspective view of the sleeve after the crimping pieces are bent. FIG. [Figure 5A] FIG. 4 is a perspective view of the electric wire terminal including the sleeve before the crimping piece is bent. [Figure 5B] 6 is a front view of the electric wire terminal as seen from a position corresponding to the VB-VB portion in FIG. 5. [Figure 6A] 11 is a perspective view of the electric wire terminal including the sleeve after the crimping piece is bent. FIG. [Figure 6B] 7 is a front view of the electric wire terminal as seen from a position corresponding to the VIB-VIB portion in FIG. 6. [Figure 7] 11 is a diagram showing a first example of another crimped state by the crimping pieces. FIG. [Figure 8] 13 is a diagram showing a second example of another crimping state by the crimping pieces. FIG. [Figure 9A] 13A and 13B are a side view and a cross-sectional view of another sleeve before the crimping pieces are bent. [Figure 9B] FIG. 13 is a side view of the other sleeve after the crimping pieces have been bent. [Figure 10] FIG. 11 is a front view of a wire end when another sleeve is used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, connectors according to each embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0011] Fig. 1 is a perspective view of a connector 1 according to one embodiment. Fig. 1 shows the connector 1 attached to an electric wire 100, with only the outer housing 60 separated. Hereinafter, the constituent units of the connector 1 excluding the outer housing 60 will be referred to as a "connector assembly 2."

[0012] Fig. 2 is an exploded perspective view of the connector assembly 2. Fig. 2 also shows an electric wire 100 in a state before the connector 1 is attached.

[0013] Fig. 3 is a cross-sectional view of the connector assembly 2 corresponding to the III-III portion in Fig. 1. In Fig. 3, the connector assembly 2 is cut at a plane passing through the second core wire 102b of the second wiring 101b which is one wiring of the pair wire 101 included in the electric wire 100.

[0014] Hereinafter, the directions referred to in explaining the structure of the connector 1 are defined as follows. The X direction corresponds to the connection direction when the connector 1 is connected to an external connection target. The X direction also corresponds to the axial direction of the sleeve 20 housed inside the connector 1. The cross sections at each position of each element constituting the connector 1 and the electric wire 100 are represented by a YZ plane that is perpendicular to the X direction and is defined by the Y and Z directions that are perpendicular to each other. The Y direction corresponds to the width direction of the sleeve 20. The Z direction corresponds to the height direction of the sleeve 20.

[0015] The connector 1 is attached to, for example, an electric wire 100 for vehicle mounting, and realizes high-speed digital signal transmission in a high-speed region and high-frequency band in accordance with current or future high-speed communication standards. In this embodiment, the electric wire 100 to which the connector 1 is attached includes a pair wire 101 consisting of two wires, a first wire 101a and a second wire 101b, as a differential wiring. Specifically, the electric wire 100 may be a shielded twisted pair wire (STP: Shielded Twisted Pair) or a shielded parallel pair wire (SPP: Shielded Parallel Pair). The first wire 101a includes a first core wire 102a which is a conductor and a first insulator 103a which covers the first core wire 102a. Similarly, the second wire 101b includes a second core wire 102b which is a conductor and a second insulator 103b which covers the second core wire 102b. Moreover, the electric wire 100 includes a metal foil 104 around which the pair wires 101 are integrally wound, a metallic braid 105 that covers the outer periphery of the metal foil 104, and an insulating sheath 106 that covers the outer periphery of the braid 105. The sheath 106 is made of, for example, a synthetic resin.

[0016] The connector 1 also includes two inner terminals 10 , a sleeve 20 , an inner housing 30 , an outer terminal 40 , and an outer housing 60 .

[0017] The inner terminal 10 is a terminal fitting that functions as a conductor for a signal line. The connector 1 has two inner terminals 10, a first terminal 10a and a second terminal 10b, which are identical in shape. The first terminal 10a is attached to an end of the first wiring 101a. The second terminal 10b is attached to an end of the second wiring 101b.

[0018] The inner terminal 10 also has a connection portion 11, a joint portion 12, and a linking portion 13. The connection portion 11 is used to insert a mating signal terminal fitting when the connector 1 is connected to an external connection target. The connection portion 11 is cylindrical with an axial direction along the length direction. A part of the open end of the connection portion 11 is composed of a pair of elastic contact pieces. The joint portion 12 joins the first core wire 102a or the second core wire 102b by crimping. The joint portion 12 of the first terminal 10a joins the first core wire 102a of the first wiring 101a. The joint portion 12 of the second terminal 10b joins the second core wire 102b of the second wiring 101b. The linking portion 13 is located between the connection portion 11 and the joint portion 12 along the length direction, and links the connection portion 11 and the joint portion 12.

[0019] 4A and 4B are perspective views of a sleeve 20 having a plurality of crimping pieces 22. Fig. 4A is a diagram showing the sleeve 20 in a state before each of the crimping pieces 22 is bent. Meanwhile, Fig. 4B is a diagram showing the sleeve 20 in a state after each of the crimping pieces 22 has been bent.

[0020] The sleeve 20 is a cylindrical metal member arranged on the outer periphery of the braid 105 exposed to the outside of the electric wire 100. The sleeve 20 may be, for example, a member that is machined from a sheet metal material having a certain thickness to have an overall shape in which the cross section before being crimped to the electric wire 100 is C-shaped. In this case, the sleeve 20 has a first circumferential end 21a and a second circumferential end 21b. The first circumferential end 21a and the second circumferential end 21b face each other while being separated from each other in the circumferential direction of the sleeve 20. Here, the first circumferential end 21a may have an engagement recess 21c, and the second circumferential end 21b may have an engagement protrusion 21d. When the sleeve 20 is arranged on the outer periphery of the braid 105 and then crimped to the braid crimping portion 42 of the outer terminal 40, the engagement protrusion 21d is fitted into the engagement recess 21c.

[0021] Moreover, the sleeve 20 has a plurality of crimping pieces 22 at a front end 21e, which is an end closer to the terminal of the pair wire 101 in the axial direction. In the present embodiment, as an example, the sleeve 20 has four crimping pieces 22, namely, a first crimping piece 22a, a second crimping piece 22b, a third crimping piece 22c, and a fourth crimping piece 22d. With respect to the width of each crimping piece 22 along the circumferential direction of the sleeve 20, the width of the tip is narrower than the width of the base. By setting the width of the tip of the crimping piece 22 narrower, it becomes easier to avoid interference between adjacent crimping pieces 22 after bending the crimping pieces 22. On the other hand, by setting the width of the base of the crimping piece 22 wider, it becomes easier for the crimping piece 22 to obtain a strength sufficient to withstand bending.

[0022] 5A and 5B are diagrams showing an end portion of the electric wire 100 before the sleeve 20 is disposed on the outer periphery of the braid 105 and the crimping pieces 22 are bent. FIG. 5A is a perspective view of the end portion of the electric wire 100. In FIG. 5A, two inner terminals 10 are shown together: a first terminal 10a attached to an end of the first wiring 101a and a second terminal 10b attached to an end of the second wiring 101b. FIG. 5B is a front view of the end portion of the electric wire 100 seen in the direction opposite to the X direction from a position cut on a plane corresponding to the VB-VB portion in FIG. 5A. Note that in FIG. 5B, the metal foil 104 is omitted for convenience.

[0023] When the sleeve 20 is disposed on the outer periphery of the braid 105, first, a tip portion 105a having a length dimension approximately equal to the length of the sleeve 20 is secured on the outer periphery of the braid 105, and the sleeve 20 is disposed upstream of the tip portion 105a in the X direction. Next, the tip portion 105a is folded back by each of the crimping pieces 22 to cover the outer periphery 21f of the sleeve 20. At this stage, the sleeve 20 contacts the braid 105 at both the outer periphery 21f and the inner periphery 21g, i.e., the entire sleeve 20 is covered by the braid 105.

[0024] Here, with reference to FIG. 5B, the arrangement of each crimping piece 22 at the front end 21e will be described. First, two imaginary planes, a first imaginary plane P1 and a second imaginary plane P2, which include the axial center AX of the sleeve 20 and are perpendicular to each other, are assumed. The first imaginary plane P1 is an imaginary plane represented by the XY plane. The second imaginary plane P2 is an imaginary plane represented by the XZ plane. In the example of FIG. 5B, the first wiring 101a and the second wiring 101b constituting the pair wire 101 are aligned along the Y direction. At this time, the central axes of the first wiring 101a and the second wiring 101b are approximately on the first imaginary plane P1.

[0025] In this case, the first crimping piece 22a and the third crimping piece 22c, and the second crimping piece 22b and the fourth crimping piece 22d are each symmetrical with respect to the first imaginary plane P1. At the same time, the first crimping piece 22a and the second crimping piece 22b, and the third crimping piece 22c and the fourth crimping piece 22d are each symmetrical with respect to the second imaginary plane P2. In other words, the multiple crimping pieces 22 are arranged so that they can be considered as multiple combinations of pairs of crimping pieces 22 that are symmetrical with respect to an imaginary plane including the axial center AX of the sleeve 20.

[0026] Further, the pair of the first and second crimping pieces 22a and 22b and the pair of the third and fourth crimping pieces 22c and 22d are arranged symmetrically with respect to the first imaginary plane P1. At the same time, the pair of the first and third crimping pieces 22a and 22c and the pair of the second and fourth crimping pieces 22b and 22d are arranged symmetrically with respect to the second imaginary plane P2.

[0027] Also, a first interval S1 between the first crimping piece 22a and the second crimping piece 22b is narrower than a second interval S2 between the first crimping piece 22a and the third crimping piece 22c. However, the first interval S1 is preset to an extent that the first crimping piece 22a and the second crimping piece 22b adjacent to each other do not interfere with each other when they are bent. In the example of FIG. 5B, the interval between the third crimping piece 22c and the fourth crimping piece 22d is also represented by the first interval S1, and the interval between the second crimping piece 22b and the fourth crimping piece 22d is also represented by the second interval S2.

[0028] Further, attention is paid to the first wiring 101a of the two wirings constituting the pair wire 101. Here, the distance between the line center AX1 of the first wiring 101a and the braid 105 closest to the first wiring 101a along the Y direction in which the first wiring 101a and the second wiring 101b are aligned is defined as a first distance L1. Meanwhile, the distance between the line center AX1 of the first wiring 101a and the braid 105 closest to the first wiring 101a along the Z direction perpendicular to the Y direction is defined as a second distance L2. Here, when a part of the sheath 106 is cut off at the end of the electric wire 100 and a part of the braid 105 is exposed to the outside, a gap is generated between the pair wire 101 and the braid 105, and the second distance L2 becomes longer than the first distance L1 as shown in FIG. 5B.

[0029] 6A and 6B are views showing an end portion of the electric wire 100 after a plurality of crimping pieces 22 are bent following the state shown in Fig. 5A and Fig. 5B. Fig. 6A is a perspective view of the end portion of the electric wire 100 shown in accordance with Fig. 5A. Fig. 6B is a front view of the end portion of the electric wire 100 seen in the direction opposite to the X direction from a position cut at a plane corresponding to the VIB-VIB portion in Fig. 6A. Note that in Fig. 6B, the metal foil 104 is omitted for convenience.

[0030] After the tip 105a of the braid 105 covers the outer periphery 21f of the sleeve 20, each crimping piece 22 is bent in a direction approaching the pair wire 101 as shown in Figs. 6A and 6B. As a result, in this embodiment, the pair wire 101 is crimped so as to be sandwiched in the Z direction between a pair of the first crimping piece 22a and the second crimping piece 22b and a pair of the third crimping piece 22c and the fourth crimping piece 22d. At this time, as each crimping piece 22 is bent, the braid 105 covering the crimping piece 22 also approaches the pair wire 101, so that the second distance L2 becomes shorter as shown in Fig. 6B than in the state shown in Fig. 5B. Specifically, in this embodiment, the value of the second distance L2 is equal to the value of the first distance L1.

[0031] The task of bending the crimping piece 22, i.e., the task of crimping the crimping piece 22 to the pair wire 101, may be performed by a worker as one step in the task of attaching the connector 1 to the end of the electric wire 100, or may be performed automatically by a work robot in appropriate equipment.

[0032] The inner housing 30 is an insulating member for matching impedance between the first wiring 101a and the second wiring 101b. The material of the inner housing 30 is, for example, a synthetic resin. The inner housing 30 has a longitudinal direction in the X direction and two parallel through holes 33 that each penetrate between a first end face 31 on the downstream side and a second end face 32 on the upstream side. One of the through holes 33 accommodates the entire first terminal 10a. The other through hole 33 accommodates the entire second terminal 10b. The cross-sectional shape of the inner housing 30 is approximately elliptical so that the thickness of the outer periphery of each of the two through holes 33 is ensured to be equal.

[0033] The outer terminal 40 is a shield terminal that functions as a shielding conductor. The outer terminal 40 has a shield connecting portion 41, a braid crimping portion 42, and a sheath crimping portion 43.

[0034] The shield connection part 41 engages with a mating terminal fitting for shielding when the connector 1 is connected to an external connection target. The shield connection part 41 has an axial direction in the X direction and is cylindrical with a cross section that is approximately elliptical to match the outer shape of the inner housing 30. The shield connection part 41 accommodates the inner housing 30 with the inner terminal 10 accommodated in the through hole 33 in an internal space surrounded by an inner circumferential surface 41b. The connection port 41a of the shield connection part 41 opens the first end surface 31 of the inner housing 30 outward.

[0035] The braid crimping portion 42 is a tubular portion coaxially connected to the shield connecting portion 41, and engages the braid 105 of the electric wire 100 by crimping when the tip of the electric wire 100 is inserted from the electric wire inlet 43a and the shield connecting portion 41 accommodates the inner housing 30. In this embodiment, the braid crimping portion 42 crimps a portion of the electric wire 100 where the sleeve 20 is disposed.

[0036] The sheath crimping portion 43 is a tubular portion coaxially connected to the braid crimping portion 42, and engages the sheath 106 of the electric wire 100 by crimping while the braid crimping portion 42 is crimping the braid 105.

[0037] The outer housing 60 is an insulating member forming the exterior of the connector 1. The material of the outer housing 60 is, for example, synthetic resin. The outer housing 60 is cylindrical with an axial direction in the X direction and a cross section that is approximately rectangular. The outer housing 60 has a housing portion 63 that penetrates along the axial direction between a tip surface 61 and an electric wire connection surface 62. The housing portion 63 houses the connector assembly 2. In the connector 1 in a completed state, the opening on the tip surface 61 side of the housing portion 63 opens the first end surface 31 of the inner housing 30 and the connection port 41a of the shield connection portion 41 to the outside. In addition, the outer housing 60 may have an engagement portion 64 on a part of its outer wall surface that engages with a locking portion provided in advance on the connection object when the connector 1 is connected to an external connection object. The engagement portion 64 functions as a so-called lock mechanism that prevents the connector 1 from falling off from the connection object.

[0038] Next, the effects of the connector 1 will be described.

[0039] The connector 1 is attached to an electric wire 100 including a pair wire 101 surrounded by a metal braid 105. The connector 1 includes a cylindrical sleeve 20 arranged on the outer periphery of the braid 105 exposed to the outside, and an outer terminal 40 as a shield terminal having a braid crimping portion 42 that crimps a portion of the electric wire 100 where the sleeve 20 is arranged. The sleeve 20 has a plurality of crimping pieces 22 at a front end 21e, which is an end portion closer to the terminal of the pair wire 101 in the axial direction. When the sleeve 20 is arranged on the outer periphery of the braid 105, a tip portion 105a of the braid 105 is folded back by the crimping piece 22 to cover an outer periphery 21f of the sleeve 20. After the tip portion 105a of the braid 105 covers the outer periphery 21f of the sleeve 20, the plurality of crimping pieces 22 are bent in a direction approaching the pair wire 101.

[0040] First, according to connector 1, each crimping piece 22 covered with braid 105 is bent in a direction approaching pair wire 101, so that braid 105 covering crimping piece 22 also approaches pair wire 101, narrowing the gap between pair wire 101 and braid 105. That is, as illustrated above by comparing Fig. 5B and Fig. 6B, the value of second distance L2 can be brought closer to the value of first distance L1, which contributes to impedance matching and, as a result, can improve the transmission characteristics in high-speed communication.

[0041] In the above example, the first distance L1 is defined along the direction in which the first wiring 101a and the second wiring 101b are aligned, i.e., along the Y direction, and the second distance L2 is defined along the direction perpendicular to the first distance L1, i.e., along the Z direction. In this case, if the multiple crimping pieces 22 are not bent, the gap between the pair wire 101 and the braid 105 in the Z direction will be large, as shown in Fig. 5B. In contrast, since the pair wire 101 is crimped by the multiple crimping pieces 22 along the Z direction, most of the gap between the pair wire 101 and the braid 105 can be narrowed, as shown in Fig. 6B.

[0042] However, in the operation of attaching the connector 1 to the end of the electric wire 100, the direction in which the gap between the pair wire 101 and the braid 105 is large does not necessarily coincide with the direction in which the multiple crimping pieces 22 crimp the pair wire 101. Below, Figs. 7 and 8 show examples of the crimping state by the multiple crimping pieces 22 when the direction in which the gap between the pair wire 101 and the braid 105 is large does not coincide with the direction in which the multiple crimping pieces 22 crimp the pair wire 101.

[0043] Fig. 7 is a diagram showing a first example of another crimping state by the crimping piece 22, in which the direction in which the first wiring 101a and the second wiring 101b are arranged is inclined so as to be approximately along the direction connecting the second crimping piece 22b and the third crimping piece 22c. Note that Fig. 7 is drawn based on Fig. 6B.

[0044] 7, the second crimping piece 22b and the third crimping piece 22c face each other in the direction in which the first wiring 101a and the second wiring 101b are arranged, and therefore cannot be bent significantly. However, the first crimping piece 22a can be bent closer to the second wiring 101b, and similarly, the fourth crimping piece 22d can be bent closer to the first wiring 101a. Therefore, although the gap between the pair wire 101 and the braid 105 remains overall, the value of a part of the second distance L2 can be shortened, which can be advantageous for impedance matching.

[0045] Fig. 8 is a diagram showing, as a second example of another crimping state by the crimping pieces 22, a case in which the direction in which the first wiring 101a and the second wiring 101b are arranged coincides with the direction in which the crimping pieces 22 crimp the pair wire 101. Note that Fig. 8 is drawn based on Fig. 6B.

[0046] 8, not all of the crimping pieces 22 are bent significantly. However, both the first crimping piece 22a and the second crimping piece 22b approach the second wiring 101b, and similarly, both the third crimping piece 22c and the fourth crimping piece 22d approach the first wiring 101a. Therefore, for example, the gaps in the portions indicated by the third distance L3, which is the distance between the braid 105 in the vicinity of the third crimping piece 22c, and the fourth distance L4, which is the distance between the braid 105 in the vicinity of the fourth crimping piece 22d, become smaller, which is advantageous for impedance matching.

[0047] In this way, according to the connector 1, each crimping piece 22 is bent to follow the outer circumferential shape of the entire pair wire 101, regardless of whether the direction in which the gap between the pair wire 101 and the braid 105 is large coincides with the direction in which the multiple crimping pieces 22 crimp the pair wire 101. Then, as illustrated in Fig. 7 and Fig. 8, whichever crimping state is selected by the multiple crimping pieces 22, it acts in a direction that improves impedance matching. In other words, according to the connector 1, it is not necessary to specify the direction of the outer circumferential shape of the entire pair wire 101 in advance when arranging the sleeve 20 on the braid 105, so that the installation work of the connector 1 to the terminal of the electric wire 100 can be simplified.

[0048] As described above, according to the present embodiment, it is possible to provide a connector 1 that improves transmission characteristics in a simple manner.

[0049] In the above description, a case has been exemplified in which one of the multiple crimping pieces 22 is symmetrical to any of the other crimping pieces 22 with respect to the first imaginary plane P1 or the second imaginary plane P2. However, as long as the same effect is achieved, at least one of the crimping pieces 22 may be arranged in a manner that is not symmetrical to the other crimping pieces 22.

[0050] Furthermore, in the connector 1, the multiple crimping pieces 22 may be multiple combinations of pairs of crimping pieces 22 that are symmetrical with respect to an imaginary plane that includes the axial center AX of the sleeve 20.

[0051] Here, the imaginary plane including the axial center AX of the sleeve 20 may be either the first imaginary plane P1 or the second imaginary plane P2 exemplified above.

[0052] According to this connector 1, each of the crimping pieces 22 is disposed in a well-balanced manner at the front end 21e of the sleeve 20. Therefore, regardless of the orientation of the outer circumferential shape of the entire pair wire 101 relative to the posture of the sleeve 20, each of the crimping pieces 22 can be easily made to conform to the outer circumferential shape of the entire pair wire 101 when the multiple crimping pieces 22 are bent.

[0053] On the other hand, in the above explanation, an example was given of the case where the multiple fastening pieces 22 are four, namely, the first fastening piece 22a, the second fastening piece 22b, the third fastening piece 22c, and the fourth fastening piece 22d, but in accordance with the above regulations, the sleeve 20 can be modified as follows.

[0054] 9A and 9B are views of a sleeve 50 having multiple crimping pieces 52, which is an alternative to sleeve 20. Fig. 9A is a combined side and cross-sectional view of sleeve 50 before multiple crimping pieces 52 are bent. Fig. 9B is a side view of sleeve 50 after multiple crimping pieces 52 have been bent.

[0055] Fig. 10 is a front view of the end portion of the electric wire 100 as viewed in the direction opposite to the X direction when the sleeve 50 is used. Fig. 10 is drawn based on Fig. 6B when the sleeve 20 is used.

[0056] The sleeve 50 is cylindrical with the same diameter as the sleeve 20, and has eight crimping pieces 52 at the front end 51e. That is, the crimping pieces 52 are a first crimping piece 52a, a second crimping piece 52b, a third crimping piece 52c, a fourth crimping piece 52d, a fifth crimping piece 52e, a sixth crimping piece 52f, a seventh crimping piece 52g, and an eighth crimping piece 52h. In this example, the first crimping piece 52a and the fifth crimping piece 52e are symmetrical with respect to the second imaginary plane P2. The second crimping piece 52b and the eighth crimping piece 52h, the third crimping piece 52c and the seventh crimping piece 52g, and the fourth crimping piece 52d and the sixth crimping piece 52f are symmetrical with respect to the first imaginary plane P1. At the same time, the second crimping piece 52b and the fourth crimping piece 52d, and the sixth crimping piece 52f and the eighth crimping piece 52h are symmetrical with respect to the second imaginary plane P2. With such a plurality of crimping pieces 52, for example, by arranging the third crimping piece 52c and the seventh crimping piece 52g on the second imaginary plane P2, the braid 105 can be easily inserted into the gap between the first wiring 101a and the second wiring 101b. Therefore, as can be seen by comparing with FIG. 6B in which the sleeve 20 is used, the sleeve 50 can narrow the gap between the pair wire 101 and the braid 105, and as a result, the transmission characteristics can be improved.

[0057] Furthermore, in the connector 1, two imaginary planes, a first imaginary plane P1 and a second imaginary plane P2, which are perpendicular to each other, are assumed, and the multiple crimping pieces 22 may include a first crimping piece 22a, a second crimping piece 22b, a third crimping piece 22c, and a fourth crimping piece 22d. A pair of the first crimping piece 22a and the second crimping piece 22b and a pair of the third crimping piece 22c and the fourth crimping piece 22d may have symmetrical shapes with respect to the first imaginary plane P1. A pair of the first crimping piece 22a and the third crimping piece 22c and a pair of the second crimping piece 22b and the fourth crimping piece 22d may have symmetrical shapes with respect to the second imaginary plane P2.

[0058] This connector 1 corresponds to the case where the above-mentioned example sleeve 20 is used, and although there is a larger gap between the pair wire 101 and the braid 105 than when the sleeve 50 is used, it is advantageous for improving the transmission characteristics with a simpler configuration.

[0059] Furthermore, in the connector 1, the first interval S1 between the first crimping piece 22a and the second crimping piece 22b may be narrower than the second interval S2 between the first crimping piece 22a and the third crimping piece 22c.

[0060] According to this connector 1, the direction in which pair wire 101 is crimped is specified as the direction in which a pair of first crimping piece 22a and second crimping piece 22b and a pair of third crimping piece 22c and fourth crimping piece 22d face each other. Therefore, as shown in the example of Fig. 6B, it is advantageous to narrow the gap between pair wire 101 and braid 105 with a smaller number of crimping pieces 22 arranged.

[0061] Furthermore, as illustrated in FIG. 9A, in connector 1, sleeve 50 may have linear grooves 53 along the circumferential direction at the base of each crimping piece 52, on inner wall 51g of sleeve 50.

[0062] According to this connector 1, each crimping piece 52 can be easily bent toward pair wires 101. Note that such a groove 53 may be provided at the base of each crimping piece 22 in sleeve 20.

[0063] Although the embodiments have been described above, the embodiments are not limited to these, and various modifications are possible within the scope of the gist of the embodiments. [Explanation of symbols]

[0064] 1 Connector 20,50 sleeve 21e,51e Front end 21f,51f outer circumference 22,52 Crimping piece 22a First crimp piece 22b 2nd caulking piece 22c Third crimp piece 22d Fourth crimp piece 40 Outer terminal 42 Braid Crimp 51g inner wall 53 Groove 100 wire 101 Pair Wire 105 Braid AX axis center P1 First virtual surface P2 Second virtual surface S1 First interval S2 2nd interval

Claims

1. A connector to be attached to an electric wire including a pair of wires surrounded by a metal braid, A cylindrical sleeve disposed on the outer periphery of the braid exposed to the outside; a shield terminal having a braid crimping portion that crimps a portion of the electric wire where the sleeve is disposed, the sleeve has a plurality of crimping pieces at a front end portion which is an end portion closer to an end of the pair wires in the axial direction, When the sleeve is disposed on the outer periphery of the braid, a tip portion of the braid is folded back by the crimping piece to cover the outer periphery of the sleeve; After the tip portion of the braid covers the outer periphery of the sleeve, the multiple crimping pieces are bent in a direction approaching the pair wires.

2. The connector according to claim 1 , wherein the plurality of crimping pieces are a combination of a pair of the crimping pieces that are symmetrical with respect to an imaginary plane including an axial center of the sleeve.

3. Two imaginary planes, a first imaginary plane and a second imaginary plane, are assumed to be perpendicular to each other; The plurality of crimping pieces include a first crimping piece, a second crimping piece, a third crimping piece, and a fourth crimping piece, a pair of the first crimping piece and the second crimping piece and a pair of the third crimping piece and the fourth crimping piece have symmetric shapes with respect to the first imaginary plane, The connector of claim 2, wherein a pair of the first fastening piece and the third fastening piece and a pair of the second fastening piece and the fourth fastening piece are symmetrical with respect to the second imaginary plane.

4. The connector according to claim 3 , wherein a distance between the first and second crimping pieces is narrower than a distance between the first and third crimping pieces.

5. 3. The connector according to claim 1, wherein the sleeve has linear grooves extending in a circumferential direction at the base of each of the crimping pieces and on an inner wall of the sleeve.

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