JP2009054483A - Terminal crimping structure, and shielded connector equipped with this terminal crimping structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal crimping structure in which characteristic impedance matching with a shield electric wire is carried out by making lower the characteristic impedance increased in a connecting part position between an inner conductor terminal of a shielded connector and a signal conductor of the shield electric wire. <P>SOLUTION: This is the crimping structure of a terminal 2 in which a pair of crimping pieces 2e, 2f crimped and connected to a conductor Wa exposed by peeling of an insulator Wb of the electric wire W are formed upright on. A loop part 2g folded inside from the tip is formed at the one crimping piece 2e, and the loop part 2g is elastically contacted with the conductor Wa of the electric wire W in a crimping state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to connection of electric wires such as wire harnesses to electric devices such as automobiles, and more particularly to a crimping structure of a terminal connected to a conductor or the like of an electric wire and a shield connector provided with the terminal crimping structure. .

  In recent years, electrical signals transmitted to printed circuit boards for control mounted with electronic components and ICs (integrated circuits) incorporated in electrical devices of automobiles such as car navigation systems have been accelerated (increased in frequency). Circuit patterns formed on the printed circuit board are also densely packed and densified. Generally, a shielded wire is used to transmit such a high-frequency electric signal. However, as the transmitted electric signal is further increased in frequency, the shield connector connected to the shielded wire is further increased. There is a growing demand for higher frequencies.

  An example of a shielded wire is what is called a coaxial wire. Commonly used coaxial cables are a signal conductor that bundles a plurality of strands such as copper wires as a transmission path for electrical signals, a shield conductor that is composed of a braided wire formed by braiding a plurality of strands, and these An insulator interposed between conductors and an insulating sheath covering the outer periphery of the shield conductor are arranged coaxially, and the shield conductor covers the outer periphery of the signal conductor without any gaps. Shield to.

  Normally, a shield connector connected to the end portion of a coaxial cable that transmits such a high-frequency signal is connected to an inner conductor terminal that is connected to a signal conductor that transmits the high-frequency signal and a shield conductor such as a braided wire. Both are provided with an outer conductor terminal covering the outer periphery of the inner conductor terminal, and a dielectric having a predetermined relative dielectric constant interposed between the inner conductor terminal and the outer conductor terminal, and insulates the end portion of the coaxial cable. An inner conductor terminal and an outer conductor terminal are connected to the signal conductor and the shield conductor exposed by peeling off the body and the sheath, respectively.

  An example of such a shield connector is disclosed in Patent Document 1 below. FIG. 8 shows a longitudinal section of the shield connector. As shown in the figure, the shield connector 20 is connected to a portion where the insulator Wb and the sheath We of the coaxial cable W are peeled off and the signal conductor Wa and the shield conductor Wd are exposed. The inner conductor terminal 21 is connected to the signal conductor Wa via the crimping portion 21a, and the outer conductor terminal 4 is connected to the shield conductor Wd via the crimping portion 23a. A dielectric 22 that insulates both the terminals is provided. It is provided between both terminals.

  In general, the characteristic impedance of a coaxial cable in transmission of a high-frequency signal is set to, for example, 50Ω, and matching (matching) with the characteristic impedance of a circuit board or the like of an electric device to be connected is achieved. If a portion (mismatched portion) where the characteristic impedance is not matched exists in the transmission path of the high-frequency signal, problems such as a decrease in transmission efficiency due to signal reflection at the mismatched portion and generation of noise occur. Therefore, the characteristic impedance of the shield connector needs to be matched with the characteristic impedance of the coaxial cable.

  Normally, the characteristic impedance of a shielded connector is adjusted by adjusting the “ratio between the inner diameter of the shell of the outer conductor terminal and the outer diameter of the terminal of the inner conductor terminal” and the “dielectric constant of the dielectric” to match the impedance with the coaxial cable. However, as shown in FIG. 8, the outer diameter of the crimped portion 21a after crimping the inner conductor terminal 21 has a size and shape giving priority to the reliability of electrical connection with the signal conductor Wa. In general, since the diameter is smaller than the outer diameter of the terminal portion 21b, the “ratio of the inner diameter of the shell portion 23b of the outer conductor terminal 23 and the outer diameter of the crimp portion 21a of the inner conductor terminal 21” at the position of the crimp portion 21a The “ratio of the inner diameter of the shell portion 23b of the outer conductor terminal 23 and the outer diameter of the terminal portion 21b of the inner conductor terminal 21” at the position of the portion 21b is not the same. For this reason, the characteristic impedance in the crimping part 21 a of the inner conductor terminal 21 is not matched with the characteristic impedance of the coaxial cable W, and is higher than the characteristic impedance of the coaxial cable W.

  In such a portion where the characteristic impedance of the shield connector is not equal to that of the coaxial cable, the transmitted electrical signal is reflected or radiated, resulting in problems such as the signal not being transmitted correctly or causing noise. Or In particular, this tendency becomes remarkable in the transmission of high-frequency signals of several GHz.

  In order to improve this, the outer diameter of the crimped part after crimping of the inner conductor terminal should be reduced because the characteristic impedance at the crimped part position of the inner conductor terminal should be lowered so as to match the characteristic impedance of the coaxial cable. It is possible to achieve impedance matching by increasing the diameter to the outer diameter of the terminal portion. Conventionally, as a method of increasing the outer diameter of the crimping portion, a method of attaching a cylindrical metal sleeve to the crimping portion has been adopted.

JP 2000-173725 A

  However, the method of attaching a cylindrical metal sleeve to the crimping part and increasing the outer diameter of the crimping part is that the metal sleeve is placed on an insulator that is exposed from the coaxial cable before crimping the crimping part of the inner conductor terminal. Therefore, there is a problem in that the work to pass through is complicated. Also, depending on the type of coaxial cable, the thickness of the signal conductor changes, and the outer diameter of the crimped part after crimping of the inner conductor terminal crimped to the signal conductor also changes. It will change. Therefore, in order to cope with a plurality of types of coaxial cables, it is necessary to prepare metal sleeves of various sizes or to limit the number of applied coaxial cables to one, resulting in an increase in the production cost of the shield connector, There was a problem that the versatility was reduced due to the limitation of the coaxial cable.

  The problem to be solved by the present invention is to reduce the characteristic impedance that has been increased at the position of the connecting portion between the inner conductor terminal of the shield connector and the signal conductor of the shielded wire, and to match the characteristic impedance with the shielded wire. In addition to providing a terminal crimping structure, it is desirable to provide a versatile shield connector without the need to prepare a plurality of types of metal sleeves as in the case of impedance matching by mounting the metal sleeves described above.

  In order to solve the above problems, the terminal crimping structure according to the present invention is a terminal crimping structure in which a pair of crimping pieces that are crimped and connected to a conductor exposed by stripping an insulator of an electric wire, One crimping piece is formed with a ring-shaped portion bent inward from the tip, and in a crimped state, the ring-shaped portion is elastically in contact with the conductor of the electric wire.

  In this case, in the crimped state, the other crimped piece is overlapped on the one crimped piece on which the ring-shaped part is formed, and the other crimped piece is also formed with a ring-shaped part bent inward from the tip. In the crimped state, the ring-shaped portion may be elastically in contact with the conductor of the electric wire together with the ring-shaped portion of the one crimping piece.

  The shield connector according to the present invention includes an inner conductor terminal connected to a signal conductor of a shielded electric wire, in which an insulator is interposed between the signal conductor and the shield conductor, and an outer periphery of the shield conductor is covered with the sheath. A shield connector having a conductor terminal accommodated in a state where a dielectric is interposed and an outer conductor terminal connected to a shield conductor, the signal conductor exposed to the inner conductor terminal by peeling off the insulator A pair of crimping pieces that are crimped and connected to each other are formed upright, and one crimping piece is formed with a ring-shaped portion bent inward from the tip, and in the crimped state, the ring-shaped portion is connected to the signal conductor. The gist is that they are elastically contacted.

  In this case, in the crimped state, the other crimped piece is overlapped on the one crimped piece on which the ring-shaped part is formed, and the other crimped piece is also formed with a ring-shaped part bent inward from the tip. In the pressure-bonded state, the ring-shaped portion may be configured to elastically contact the signal conductor together with the ring-shaped portion of the one pressure-bonding piece.

  Furthermore, another shield connector according to the present invention is an inner conductor terminal connected to a signal conductor of a shielded electric wire in which an insulator is interposed between the signal conductor and the shield conductor and the outer periphery of the shield conductor is covered with a sheath; A shield connector including an outer conductor terminal connected to a shield conductor, the inner conductor terminal being accommodated with a dielectric interposed therebetween, on an outer periphery of a connection portion of the inner conductor terminal connected to the signal conductor A crimping member in which a pair of crimping pieces are formed upright is crimped and connected, and one crimping piece of this crimping member is formed with a ring-shaped portion bent inward from the tip side and in a crimped state. Then, the gist is that the ring-shaped portion is elastically contacted with the connection portion of the inner conductor terminal connected to the signal conductor.

  In this case, in the crimped state, the other crimping piece of the crimping member is overlapped on the one crimping piece on which the ring-shaped portion is formed, or the other crimping piece of the crimping member is also folded inward from the tip. It is preferable that the ring-shaped portion is formed and elastically contacted with the connection portion of the inner conductor terminal connected to the signal conductor together with the ring-shaped portion of the one crimping piece in the crimped state.

  According to the terminal crimping structure having the above configuration, one of the pair of standing crimping pieces is formed with a ring-shaped portion bent inward from the tip, and in the crimped state, the ring-shaped portion is Since it is elastically in contact with the conductor of the electric wire, the conductor of the electric wire is not damaged, and the outer diameter of the crimped piece after crimping of the terminal crimped to the conductor can be set larger than before. .

  In this case, in the crimped state, the other crimped piece is overlapped on the one crimped piece on which the ring-shaped part is formed, and the other crimped piece is also formed with a ring-shaped part bent inward from the tip. If the ring-shaped portion is elastically contacted with the signal conductor together with the ring-shaped portion of the one crimping piece in the crimped state, the outer diameter of the crimped piece after crimping the terminal crimped to the conductor is set to a predetermined value. Easy to set to size.

  Further, according to the shield connector having the above-described configuration, the inner conductor terminal is formed with the pair of crimping pieces standingly connected to the signal conductor exposed by peeling the insulator, and the one crimping piece Is formed with a ring-shaped portion bent inward from the tip, and since the ring-shaped portion is elastically contacted with the signal conductor in a crimped state, the signal conductor of the shielded wire is not damaged. The outer diameter of the crimping piece after crimping of the inner conductor terminal to be crimped to the signal conductor can be set larger than the conventional one. Thereby, the high impedance of the vicinity of the crimping piece after crimping of the inner conductor terminal, which has a smaller diameter than the terminal portion of the inner conductor terminal, can be lowered, and the impedance mismatch with the shielded electric wire can be eliminated.

  Also, since the outer diameter after crimping of the crimping piece of the inner conductor terminal connected to the signal conductor is simply set by the ring-shaped part, a conventional metal sleeve is attached to the connecting part of the inner conductor terminal connected to the signal conductor. Then, it is not necessary to pass the metal sleeve over the exposed insulator of the shielded wire as in the case of processing to increase the diameter of the inner conductor terminal connection, and processing to increase the diameter of the inner conductor terminal connection In addition to improving the performance, it is not necessary to prepare a plurality of types of metal sleeves as in the case of impedance matching by mounting the metal sleeves described above, and it is possible to deal with many types of shielded wires. Yes.

  In this case, in the crimped state, the other crimped piece is overlapped on the one crimped piece on which the ring-shaped part is formed, and the other crimped piece is also formed with a ring-shaped part bent inward from the tip. If the ring-shaped portion is elastically contacted with the signal conductor together with the ring-shaped portion of the one crimping piece in the crimped state, the outer diameter of the crimped piece after crimping of the inner conductor terminal to be crimped to the signal conductor Is easily set to a predetermined size.

  Further, according to another shielded connector having the above-described configuration, a crimp member in which a pair of crimp pieces is erected is crimped and connected to the outer periphery of the connection portion of the inner conductor terminal connected to the signal conductor. One crimping piece of the crimping member is formed with a ring-shaped portion bent inward from the tip side, and in the crimped state, the ring-shaped portion is elastically connected to the connection portion of the inner conductor terminal connected to the signal conductor. The contact does not damage the connection portion of the inner conductor terminal connected to the signal conductor, and the inner periphery of the inner conductor terminal connection portion of the inner conductor terminal connected to the signal conductor A crimping member that enlarges the diameter of the conductor terminal connection part is connected by crimping, and the high impedance near the inner conductor terminal connection part, which was smaller than the terminal part of the inner conductor terminal, can be reduced, and the shield Impedance with electric wire It is possible to solve the consistency.

  In addition, since the crimping member is simply crimped and connected to the outer periphery of the connecting portion of the inner conductor terminal connected to the signal conductor, a conventional metal sleeve is attached to the inner conductor terminal connecting portion and the inner conductor terminal connecting portion is attached. There is no need to pass the metal sleeve over the exposed insulator of the shielded wire as in the case of processing to increase the diameter, and the workability to increase the diameter of the inner conductor terminal connection is improved, There is no need to prepare a plurality of types of metal sleeves as in the case of impedance matching by mounting the metal sleeves described above, and it is possible to deal with many types of shielded wires.

  In this case, in the crimped state, the other crimping piece of the crimping member is overlapped on the one crimping piece on which the ring-shaped portion is formed, or the other crimping piece of the crimping member is also folded inward from the tip. If the ring-shaped portion formed is formed and the ring-shaped portion is elastically contacted with the connection portion of the inner conductor terminal connected to the signal conductor together with the ring-shaped portion of the one crimping piece in the crimped state, It is easy to set the outer diameter of the crimping member to be crimped to the connection portion of the inner conductor terminal connected to the signal conductor to a predetermined size.

  Hereinafter, a terminal crimping structure and a shield connector provided with the terminal crimping structure according to an embodiment of the present invention will be described in detail with reference to the drawings. First, the shield connector which concerns on the 1st Embodiment of this invention is demonstrated using FIGS. 1-3. 1 is a longitudinal sectional view of a shield connector connected to a coaxial cable, FIG. 2 is a procedure for crimping an inner conductor terminal crimping portion to a signal conductor, and FIG. 3 is a modification of the procedure for crimping in FIG. Yes. In the following description, the connection side of the shield connector with a mating connector (not shown) will be described.

  As shown in FIG. 1, the shield connector 1 has an inner conductor terminal 2 connected to a signal conductor Wa of the coaxial cable W at the end of the coaxial cable W, and the dielectric 3 accommodates and holds the inner conductor terminal 2. The dielectric 3 is constituted by an outer conductor terminal 4 which is connected to the shield conductor Wd of the coaxial cable W.

  The coaxial cable W includes a signal conductor Wa formed by twisting and bundling a plurality of strands such as copper wires as a transmission path for electrical signals, a shield conductor Wd composed of a braided wire formed by braiding a plurality of strands, and these The insulator Wb interposed between the conductors and the insulating sheath We covering the outer periphery of the shield conductor Wd are coaxially arranged, and the shield conductor Wd has no gap around the signal conductor Wa. The signal conductor Wa is electromagnetically shielded by covering.

  As shown in the figure, the coaxial wire W has a sheath We peeled off for a predetermined length to expose a shield conductor Wd, an exposed shield conductor Wd is peeled off for a predetermined length to expose an insulator Wb, and exposed insulation. The body Wb is peeled off by a predetermined length to expose the signal conductor Wa.

  The inner conductor terminal 2 of the shield connector 1 connected to the signal conductor Wa is formed integrally by bending a conductive plate material, and has a so-called female terminal shape. A crimping part 2a, which is a connecting part of the connector, is provided on the rear side, and a terminal part 2b connected to a male inner conductor terminal of a mating connector (not shown) is provided on the front side.

  The terminal portion 2b is provided with a pair of elastic contact pieces 2c, 2c formed by being folded back into the terminal portion 2b. These elastic contact pieces 2c are formed so as to be elastically deformable. When a tab portion of a male inner conductor terminal of a mating connector (not shown) is inserted between the elastic contact pieces 2c and 2c, the elastic contact pieces 2c and 2c are in contact with each other to deliver signals. Will be able to. Further, a locking piece 2d is provided on the upper surface of the terminal portion 2b so as to be bent upward and deformable.

  The dielectric 3 that accommodates and holds the inner conductor terminal 2 is integrally formed in a substantially cylindrical shape by an insulating synthetic resin having a predetermined relative dielectric constant, and the inner conductor terminal 2 is formed by the dielectric 3. And the outer conductor terminal 4 are insulated. A terminal accommodating chamber 3a that opens in the front-rear direction is formed through the dielectric 3 so that the inner conductor terminal 2 is accommodated and held in the terminal accommodating chamber 3a. A locking hole 3b for locking the locking piece 2d of the inner conductor terminal 2 is formed in the ceiling surface behind the terminal accommodating chamber 3a, and the locking of the inner conductor terminal 2 is performed in the locking hole 3b. When the piece 2d is locked, the inner conductor terminal 14 is held so as not to easily come out of the terminal accommodating chamber 3a. A lock protrusion 3c is provided on the lower surface of the rear side of the dielectric 3 so as to protrude downward.

  The outer conductor terminal 4 in which the dielectric body 3 is housed is integrally formed by bending a conductive plate material, and the substantially cylindrical shell portion 4a in which the dielectric body 3 is housed is a front part. In addition, a crimping portion 4b to which the coaxial electric wire W is fixed by crimping is provided at the rear.

  A stabilizer 4c that is inserted into a slit formed on the bottom surface of the connector housing when the outer conductor terminal 4 is accommodated in a connector housing (not shown) is formed on the front lower surface of the shell portion 4a so as to protrude downward. Yes. The direction in which the outer conductor terminal 4 is inserted into the connector housing is regulated by the stabilizer 4c. Further, at the tip of the opening 4d generated by the formation of the stabilizer 4c, when the outer conductor terminal 4 is inserted into the connector housing, a guide piece 4i guided by the bottom slit of the connector housing is tapered. Is formed.

  A lock piece 4e that engages with a lock protrusion 3c protruding from the rear lower surface of the dielectric 3 is formed on the rear lower surface of the shell 4a so as to be able to bend and deform upward. When the body 3 is inserted into the shell portion 4a of the outer conductor terminal 4 from the front, the dielectric 3 is held so as not to come off easily. In addition, on both the left and right side walls of the shell portion 4a, tongue-shaped contact pieces (not shown) that elastically contact the outer wall of the outer conductor terminal of the mating connector are formed.

  The crimping portion 4b of the outer conductor terminal 4 is formed in a stepped shape so that the shield conductor Wd terminal portion and the sheath We terminal portion of the coaxial cable W are appropriately placed. The crimping portion 4b is provided with a pair of strip-shaped sheath crimping pieces 4g and 4g similar to the pair of strip-shaped shield conductor crimping pieces 4f and 4f formed extending from the bottom surface of the crimping portion 4b. These crimping pieces have a sufficient length so that they can be wound around various coaxial wires.

  A through hole 4h is formed at the center of the bottom surface of the crimping part 4b on which the shield conductor Wd terminal portion is placed. When the shield conductor Wd terminal part is crimped by the shield conductor crimping pieces 4f and 4f, the shield conductor Wd A part thereof enters the through hole 4h.

  Next, the procedure of crimping by the crimping portion 2a of the inner conductor terminal 2 on the outer periphery of the signal conductor Wd terminal portion will be described. FIG. 2 sequentially shows the procedure of crimping by the crimping portion 2a of the inner conductor terminal 2 on the outer periphery of the signal conductor Wd terminal portion. As shown in the figure, a pair of band-shaped crimping pieces 2e and 2f formed upright from the bottom surface of the crimping portion 2a on which the signal conductor Wa terminal portion of the coaxial cable W is placed on the crimping portion 2a of the inner conductor terminal 2. Is provided. The crimping pieces 2e and 2f are widened toward the top and have a sufficient length so that they can be wound around the signal conductors of coaxial cables of various diameters. In this case, as shown in FIG. 2 (a), one crimping piece 2e has a ring-shaped portion 2g whose tip is bent inward, and an R-shaped convex surface 2i is formed inside the ring-shaped portion 2g. Has been.

  As shown in FIG. 2A, first, the signal conductor Wa terminal portion is placed on the bottom surface of the crimp portion 2 a of the inner conductor terminal 2. Thereafter, by performing a crimping process using a crimping machine (not shown), the respective crimping pieces 2e and 2f are bent inward, and are in a state as shown in FIGS. 2 (b) and 2 (c). As a result, the inner conductor terminal 2 is electrically connected to the signal conductor Wa via the crimping portion 2a.

  At this time, the crimping piece 2f is overlapped on the crimping piece 2e formed with the ring-shaped portion 2g, and the ring-shaped portion 2g of the crimping piece 2e has its R-shaped convex surface 2i elastically in contact with the signal conductor Wa. ing. Thus, the ring-shaped portion 2g formed on the crimping piece 2e elastically contacts the signal conductor Wa, so that the signal conductor Wa is not damaged, and the signal conductor Wa is prevented from being cut.

  In addition, the outer diameter of the crimping portion 2a after crimping of the inner conductor terminal 2 to be crimped to the signal conductor Wa, that is, the outer diameter of the crimping pieces 2e and 2f can be set larger than the conventional portion by the amount of the annular portion 2g. . As a result, the high impedance in the vicinity of the crimped portion after crimping of the inner conductor terminal, which has been smaller than the terminal portion of the inner conductor terminal, can be lowered, and impedance mismatch with the shielded wire can be eliminated. it can.

  Moreover, since the size of the outer diameter of the crimping pieces 2e, 2f of the inner conductor terminal 2 connected to the signal conductor Wa can be set by the size of the ring-shaped portion 2g, a conventional metal sleeve can be used as the signal conductor. There is no need to pass the metal sleeve over the exposed insulator of the shielded wire as in the case of processing to increase the diameter of the inner conductor terminal connecting portion by attaching it to the connecting portion of the connected inner conductor terminal, The workability of increasing the diameter of the connection portion between the signal conductor and the inner conductor terminal has been improved, and there is no need to prepare a plurality of types of metal sleeves as in the case of impedance matching by mounting the metal sleeve described above, It is possible to deal with many types of shielded wires.

  FIG. 3 shows a modification of FIG. 2, in which the procedure of crimping by the crimping portion 2 a of the inner conductor terminal 2 on the outer periphery of the signal conductor Wd terminal portion is shown in order. As shown in the figure, a pair of band-shaped crimping pieces 2e and 2f formed upright from the bottom surface of the crimping portion 2a on which the signal conductor Wa terminal portion of the coaxial cable W is placed on the crimping portion 2a of the inner conductor terminal 2. Is provided. The crimping pieces 2e and 2f are widened toward the top and have a sufficient length so that they can be wound around the signal conductors of coaxial cables of various diameters. In this case, as shown in FIG. 3 (b), both of the crimping pieces 2e and 2f are formed with ring-shaped portions 2g and 2h whose ends are bent inward, respectively, inside the ring-shaped portions 2g and 2h. R-shaped convex surfaces 2i and 2j are formed.

  As shown in FIG. 3A, first, the signal conductor Wa terminal portion is placed on the bottom surface of the crimp portion 2 a of the inner conductor terminal 2. Thereafter, by performing a crimping process using a crimping machine (not shown), the respective crimping pieces 2e and 2f are bent inward, and the state shown in FIGS. 3B and 3C is obtained. As a result, the inner conductor terminal 2 is electrically connected to the signal conductor Wa via the crimping portion 2a.

  At this time, the ring-shaped portions 2g and 2h of the crimping pieces 2e and 2f have their R-shaped convex surfaces 2i and 2j elastically in contact with the signal conductor Wa. As described above, the ring-shaped portions 2g and 2h formed on the crimping pieces 2e and 2f elastically contact the signal conductor Wa so that the signal conductor Wa is not damaged. Further, the outer diameters of the crimped portions 2a after crimping of the inner conductor terminal 2 to be crimped to the signal conductor Wa, that is, the outer diameters of the crimping pieces 2e and 2f are set to be larger than the conventional ones because the annular portions 2g and 2h are formed. Can do. As a result, the high impedance in the vicinity of the crimping piece after crimping of the inner conductor terminal, which has been smaller in diameter than the terminal portion of the inner conductor terminal, can be lowered, and the impedance mismatch with the shielded wire can be eliminated. it can.

  Next, a shield connector according to a second embodiment of the present invention will be described with reference to FIGS. 4 is a longitudinal sectional view of the shield connector connected to the coaxial cable, FIG. 5 is a procedure for crimping the inner conductor terminal crimping portion to the signal conductor, and FIG. 6 is an inner conductor terminal crimping portion connected to the signal conductor. FIG. 7 shows a modification of the procedure of the crimping process of FIG. 6, and FIG. In addition, about the same structure as the shield connector 1 in 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  A crimping member 5 is wound around the crimping portion 2a of the inner conductor terminal 2 of the shielded connector 10 as illustrated so as to cover the outer periphery of the crimping portion 2a after being crimped to the signal conductor Wa. . This crimping member 5 is formed into a band shape having a predetermined length by punching a conductive plate material, and the crimping member 5 is electrically connected to the crimping portion 2a of the inner conductor terminal 2 so that the crimping portion Thus, the outer diameter of 2a is electrically increased.

  Next, the procedure of crimping by the crimping portion 2a of the inner conductor terminal 2 on the outer periphery of the signal conductor Wd terminal portion and the crimping process by the crimping member 5 on the outer periphery of the crimping portion 2a after the crimping processing of the inner conductor terminal 2 are performed. The procedure will be described.

  FIG. 5 sequentially shows the procedure of crimping by the crimping portion 2a of the inner conductor terminal 2 on the outer periphery of the signal conductor Wd terminal portion. As shown in the figure, the crimping portion 2a of the inner conductor terminal 2 has a pair of band-shaped crimping pieces 2k extending from the bottom surface of the crimping portion 2a on which the signal conductor Wa terminal portion of the coaxial cable W is placed. 2k is provided. The crimping pieces 2k, 2k are widened toward the top and have a sufficient length so that they can be wound around the signal conductor Wa.

  As shown in FIG. 5A, first, the signal conductor Wa terminal portion is placed on the bottom surface of the crimp portion 2 a of the inner conductor terminal 2. Thereafter, by performing a crimping process using a crimping machine (not shown), each of the crimping pieces 2k and 2k is bent inward to be in a state as shown in FIGS. 5 (b) and 5 (c). As a result, the inner conductor terminal 2 is electrically connected to the signal conductor Wa via the crimping portion 2a.

  And the crimping | compression-bonding member 5 mentioned above is wound by the crimping process to the crimping | compression-bonding part 2a of the inner conductor terminal 2 of this state. FIG. 6 sequentially shows the procedure of the crimping process by the crimping member 5 on the outer periphery of the crimping part 2a after the crimping process of the inner conductor terminal 2. As shown in FIG. 6 (a), the left and right crimping pieces 5b, 5c of the crimping member 5 are expanded from the bottom surface 5a of the crimping member 5 so as to expand toward the upper side, and the inner conductors have various diameters. It has a sufficient length so that it can be wound around the crimped part after crimping the terminal. In this case, as shown in FIG. 6A, one crimping piece 5b is formed with a ring-shaped portion 5d whose tip is bent inward, and an R-shaped convex surface 5f is formed inside the ring-shaped portion 5d. Has been.

  As shown in FIG. 6A, first, the crimping portion 2 a after crimping the inner conductor terminal 2 is placed on the bottom surface 5 a of the crimping member 5. Thereafter, by performing a crimping process by a crimping machine (not shown), the respective crimping pieces 5b and 5c are bent inward to be in a state as shown in FIGS. 6 (b) and 6 (c). At this time, the crimping piece 5c is overlapped on the crimping piece 5b on which the annular portion 5d is formed, and the annular portion 5d of the crimping piece 5b has an R-shaped convex surface 5f on the crimping portion 2a of the inner conductor terminal 2. It is in elastic contact.

  Thus, the outer diameter of the crimping part 2a is increased by winding the crimping member 5 around the outer periphery of the crimping part 2a after the crimping process of the inner conductor terminal 2. As a result, the high characteristic impedance in the vicinity of the crimped portion 2a after the crimping process, which has a smaller diameter than the terminal portion 2b of the inner conductor terminal 2, is the characteristic impedance of the portion other than the position of the crimped portion 2a of the coaxial cable W or the shield connector 10. Can be lowered to match.

  Further, the outer diameter of the crimping portion 2a is increased simply by crimping the crimping member 5 made of a conductive plate material to the crimping portion 2a after the inner conductor terminal 2 is crimped. It is not necessary to pass a metal sleeve over the exposed insulator Wb of the coaxial cable W as in the case where the diameter of the crimping part 2a is increased by mounting, and the diameter of the crimping part 2a of the inner conductor terminal 2 is increased. Workability is improved.

  In this case, the outer diameter of the crimping member 5 when the outer diameter of the crimping portion 2a of the inner conductor terminal 2 connected to the signal conductor Wa is increased can be set by the size of the ring-shaped portion 5d. Insulator in which the metal sleeve is exposed from the shielded electric wire as in the case of mounting the metal sleeve to the connecting portion of the inner conductor terminal connected to the signal conductor to increase the diameter of the inner conductor terminal connecting portion There is no need to pass through the top, the workability of increasing the diameter of the connection portion between the signal conductor and the inner conductor terminal is improved, and there are a plurality of types as in the case of impedance matching by mounting the metal sleeve described above. There is no need to prepare a metal sleeve, and it is possible to deal with many types of shielded wires.

  FIG. 7 shows a modification of FIG. 6, and sequentially shows the procedure of the crimping process by the crimping member 5 on the outer periphery of the crimping part 2 a after the crimping process of the inner conductor terminal 2. As shown in FIG. 7 (a), the left and right crimping pieces 5b, 5c of the crimping member 5 are expanded from the bottom surface 5a of the crimping member 5 so as to expand toward the upper side, and the inner conductors of various diameters. It has a sufficient length so that it can be wound around the crimped part after crimping the terminal. In this case, as shown in FIG. 7 (b), both the crimping pieces 5b and 5c are formed with ring-shaped parts 5d and 5e whose ends are bent inward, and the ring-shaped parts 5d and 5e have an R inside. Convex convex surfaces 5f and 5g are formed.

  As shown in FIG. 7A, first, the crimping portion 2 a after crimping the inner conductor terminal 2 is placed on the bottom surface 5 a of the crimping member 5. After that, by performing a crimping process using a crimping machine (not shown), the respective crimping pieces 5b and 5c are bent inward to be in a state as shown in FIGS. 7 (b) and 7 (c). At this time, the crimping pieces 5b and 5c of the crimping member 5 are bent inward to form ring-shaped parts 5d and 5e, and the ring-shaped parts 5d and 5e are crimped to the inner conductor terminal 2 by the R-shaped convex surfaces 5f and 5g. It is in elastic contact with the part 2a.

  Thus, the outer diameter of the crimping part 2a is increased by winding the crimping member 5 around the outer periphery of the crimping part 2a after the crimping process of the inner conductor terminal 2. As a result, the high characteristic impedance in the vicinity of the crimped portion 2a after the crimping process, which has a smaller diameter than the terminal portion 2b of the inner conductor terminal 2, is the characteristic impedance of the portion other than the position of the crimped portion 2a of the coaxial cable W or the shield connector 10. Can be lowered to match.

  Further, the outer diameter of the crimping portion 2a is increased simply by crimping the crimping member 5 made of a conductive plate material to the crimping portion 2a after the inner conductor terminal 2 is crimped. It is not necessary to pass a metal sleeve over the exposed insulator Wb of the coaxial cable W as in the case where the diameter of the crimping part 2a is increased by mounting, and the diameter of the crimping part 2a of the inner conductor terminal 2 is increased. Workability is improved.

  In this case, the outer diameter of the crimping member 5 when the outer diameter of the crimping portion 2a of the inner conductor terminal 2 connected to the signal conductor Wa is increased can be set by the size of the ring-shaped portions 5d and 5e. The metal sleeve was exposed from the shielded wire as in the case of processing to increase the diameter of the inner conductor terminal connection part by attaching the metal sleeve to the connection part of the inner conductor terminal connected to the signal conductor as in the past There is no need to pass through the insulator first, the workability of increasing the diameter of the connecting portion of the signal conductor and the inner conductor terminal is improved, and a plurality of impedance matching is achieved by mounting the metal sleeve as described above. There is no need to prepare various kinds of metal sleeves, and it is possible to cope with many kinds of shielded wires.

  As mentioned above, although embodiment of the terminal crimping structure concerning this invention and the shield connector provided with this terminal crimping structure was described, this invention is not limited to such embodiment at all, and does not deviate from the summary of this invention. Needless to say, the present invention can be implemented in various ways within the scope. For example, in the above-described embodiment, the form in which the crimping member is crimped to increase the diameter of the crimping part as the connection part between the inner conductor terminal and the signal conductor has been described. Needless to say, the present invention can also be applied to connection parts such as a welding connection part connected by welding and a solder connection part connected by soldering as a connection part with the signal conductor of the inner conductor terminal.

It is a longitudinal section of the shield connector concerning a 1st embodiment of the present invention. 1 shows a procedure for connecting a signal conductor of a coaxial cable to the crimping part of the inner conductor terminal shown in FIG. 1 by crimping, and (a) shows the crimping part of the inner conductor terminal before crimping and the signal conductor of the coaxial cable. Cross-sectional view, (b) is a cross-sectional view of the crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable, and (c) is a crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable. It is a longitudinal cross-sectional view. It is the figure which showed the modification of the procedure of the crimping process of FIG. 2, (a) is a cross-sectional view of the crimping part of the inner conductor terminal before a crimping process, and the signal conductor of a coaxial electric wire, (b) is after crimping process FIG. 4C is a cross-sectional view of the crimping portion of the inner conductor terminal and the signal conductor of the coaxial cable, and FIG. 8C is a longitudinal sectional view of the crimping portion of the inner conductor terminal and the signal conductor of the coaxial cable after crimping. It is a longitudinal section of the shield connector concerning a 2nd embodiment of the present invention. 4 shows a procedure for connecting the signal conductor of the coaxial cable to the crimping portion of the inner conductor terminal shown in FIG. 4 by crimping, and (a) shows the crimping portion of the inner conductor terminal before crimping and the signal conductor of the coaxial cable. Cross-sectional view, (b) is a cross-sectional view of the crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable, and (c) is a crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable. It is a longitudinal cross-sectional view. It is the figure which showed the procedure which connects a crimping | compression-bonding member to the crimping part of the inner conductor terminal after the crimping process shown in FIG. 5 by crimping, (a) is the crimping part of the inner conductor terminal after crimping and before the crimping process (B) is a cross-sectional view of the crimped portion of the inner conductor terminal after crimping and the crimped piece of the connecting portion after crimping, and (c) is a cross-sectional view of the inner conductor terminal after crimping. It is a longitudinal cross-sectional view of the crimping | compression-bonding part and the connection part crimping piece after a crimping process. It is the figure which showed the modification of the procedure of the crimping | compression-bonding process of FIG. 6, (a) is a cross-sectional view of the crimping part of the inner conductor terminal after a crimping process, and the connection part crimping piece before a crimping process, (b) is crimping | bonding. The cross-sectional view of the crimped portion of the inner conductor terminal after processing and the crimped piece of the connecting portion after crimping, (c) is the longitudinal sectional view of the crimped portion of the inner conductor terminal after crimping and the crimped piece of connecting portion after crimping It is. It is the longitudinal cross-sectional view which showed schematic structure of the shield connector used conventionally.

Explanation of symbols

1,10 Shield connector 2 Inner conductor terminal 2a Crimp part 2b Crimp part 2e, 2f Crimp piece 2g, 2h Ring-like part 2i, 2j Convex surface 2k Crimp piece 5 Crimp piece member 5b, 5c Crimp piece 5d, 5e Ring-like part 5f, 5g Convex surface W Coaxial cable Wa Signal conductor Wb Insulator Wd Shield conductor We Sheath

Claims (9)

  A crimping structure of a terminal in which a pair of crimping pieces that are crimped and connected to a conductor exposed by stripping the insulator of an electric wire is erected, and one crimping piece has a ring-shaped portion bent inward from the tip The terminal crimping structure is characterized in that, in a crimped state, the ring-shaped portion is in elastic contact with the conductor of the electric wire.   2. The terminal crimping structure according to claim 1, wherein in the crimped state, the other crimping piece is overlapped on the one crimping piece on which the annular portion is formed.   The other crimping piece is also formed with a ring-shaped portion bent inward from the tip, and in a crimped state, the ring-shaped portion is elastically contacted with the conductor of the electric wire together with the ring-shaped portion of the one crimping piece. The terminal crimping structure according to claim 1.   An insulator is interposed between the signal conductor and the shield conductor, and the outer periphery of the shield conductor has an inner conductor terminal connected to the signal conductor of the shielded electric wire covered with the sheath, and the inner conductor terminal is in a state in which the dielectric is interposed. A shield connector provided with an outer conductor terminal to be accommodated and connected to the shield conductor, wherein the inner conductor terminal is connected to the signal conductor exposed by peeling of the insulator and is connected to the pair of crimps A piece is formed upright, and one crimping piece is formed with a ring-shaped portion bent inward from the tip, and the ring-shaped portion is elastically contacted with the signal conductor in a crimped state. Shield connector.   The shield connector according to claim 4, wherein in the crimped state, the other crimping piece is overlapped on the one crimping piece on which the ring-shaped portion is formed.   The other crimping piece is also formed with a ring-shaped portion bent inward from the tip, and in a crimped state, the ring-shaped portion is elastically contacted with the signal conductor together with the ring-shaped portion of the one crimping piece. The shield connector according to claim 4.   An insulator is interposed between the signal conductor and the shield conductor, and the outer periphery of the shield conductor has an inner conductor terminal connected to the signal conductor of the shielded electric wire covered with the sheath, and the inner conductor terminal is in a state in which the dielectric is interposed. A shield connector including an outer conductor terminal to be accommodated and connected to the shield conductor, wherein a pair of crimp pieces are erected on the outer periphery of the connection portion of the inner conductor terminal connected to the signal conductor. A member is connected by crimping, and one crimping piece of the crimping member is formed with a ring-shaped portion bent inward from the tip side, and the ring-shaped portion is connected to the signal conductor in a crimped state. A shield connector characterized in that it is elastically contacted with a connection portion of an inner conductor terminal.   The shield connector according to claim 7, wherein in the crimped state, the other crimping piece of the crimping member is overlapped on the one crimping piece on which the annular portion is formed.   The other crimping piece of the crimping member also has a ring-shaped portion bent inward from the tip, and in the crimped state, the ring-shaped portion is connected to the signal conductor together with the ring-shaped portion of the one crimping piece. The shield connector according to claim 7, wherein the shield connector is elastically contacted with the connecting portion.

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