JP5238533B2 - Manufacturing method of cable connector, cable with cable connector, cable with cable connector - Google Patents

Description

  The present invention relates to a cable connector, a cable with a cable connector, and a method of manufacturing a cable with a cable connector, and particularly preferably a cable connector in which impedance matching with a cable is achieved, and a cable ( Cable with cable connector), cable manufacturing method for this cable with cable connector, or cable connector with improved coupling strength with cable, cable with this cable connector (cable with cable connector), with this cable connector The present invention relates to a cable manufacturing method.

  Inside a vehicle such as an automobile, a wire harness for connecting electrical devices and electronic devices to each other is routed. Electric signals transmitted and received between these electric devices and electronic devices have been increased in speed (that is, increased in frequency). For this reason, a shielded cable may be used for the electric wire which comprises a wire harness so that a high frequency electric signal can be transmitted / received stably.

  Coaxial cables are widely used as a kind of shielded cable. A general coaxial cable includes an inner conductor that functions as an electrical signal path, an outer conductor that functions as a shield conductor, an insulator interposed between the inner conductor and the outer conductor, and a covering material that covers the outer conductor. Have. Then, the inner conductor, the insulator, the outer conductor, and the covering material are disposed concentrically. One or more conductive wires are applied to the inner conductor. As the outer conductor, a braided wire in which a plurality of conductive wires are knitted in a net shape or a foil made of a conductor is applied. The outer conductor covers the periphery of the inner conductor without any gap, so that the inner conductor is electromagnetically shielded.

  Generally, the cable connector attached to the end portion of the coaxial cable is generally composed of a terminal fitting (= inner conductor terminal) electrically connected to the inner conductor and a terminal fitting (= outer) electrically connected to the outer conductor. A conductor terminal) and a dielectric (this dielectric is formed of a material having a predetermined dielectric constant) interposed between the inner conductor terminal and the outer conductor terminal. The cable connector may include a connector housing that houses the inner conductor terminal, the outer conductor terminal, and the insulator. Then, at the end portion of the coaxial cable, the inner conductor terminal is attached to the inner conductor exposed by peeling off the insulator. In addition, an outer conductor terminal is attached to the outer conductor exposed by peeling off the covering material.

  As such a cable connector, the following configuration is disclosed (see Patent Document 1). Patent Document 1 discloses a configuration in which an insulator and a covering material of a coaxial cable are peeled off, and a cable connector is connected to the exposed inner conductor and outer conductor. Specifically, the inner conductor is crimped to the crimp portion of the inner conductor terminal, and the outer conductor is crimped to the crimp portion of the outer conductor terminal. The outer conductor terminal and the inner conductor terminal are kept in an electrically insulated state by the dielectric.

  By the way, the characteristic impedance of the coaxial cable in high-frequency signal transmission is set to 50Ω, for example, and matching (impedance matching) with the impedance of the circuit board of the electrical device or electronic device to be connected is achieved. Yes. If there is an impedance mismatched part (impedance irregularity) in the high-frequency signal transmission path, signal reflection occurs at the mismatched part, resulting in problems such as reduced transmission efficiency and noise. Sometimes. In particular, problems tend to occur as the frequency of the signal increases. Therefore, it is preferable that impedance matching between the cable connector and the coaxial cable be achieved.

  The impedance of the cable connector is the ratio of the inner diameter of the body part of the outer conductor terminal (= the part in which the dielectric and the inner conductor terminal are accommodated) and the outer diameter of the body part of the inner conductor terminal (= the part connected to the mating terminal). By adjusting this, matching with the characteristic impedance of the coaxial cable is achieved. However, the size and shape of the crimp portion of the inner conductor terminal are often set with priority given to the reliability of electrical connection with the inner conductor, and are generally set smaller than the outer diameter of the main body portion. That is, the ratio between the inner diameter of the main body portion of the outer conductor terminal and the outer diameter of the main body portion of the inner conductor terminal is different from the ratio of the inner diameter of the main body portion of the outer conductor terminal and the outer diameter of the crimp portion of the inner conductor terminal. For this reason, the impedance at the crimping portion of the inner conductor terminal is different from the impedance at the other part, resulting in impedance irregularities in the signal transmission path.

  Therefore, in order to eliminate impedance irregularities, a configuration in which a cylindrical member is mounted on the outer periphery of the crimping portion of the inner conductor terminal or a configuration in which a member having a predetermined shape is mounted is employed. According to such a configuration, the outer diameter of the crimping portion can be increased to be substantially the same as the outer diameter of the main body portion. Therefore, the ratio of the inner diameter of the body portion of the outer conductor terminal and the outer diameter of the body portion of the inner conductor terminal is substantially the same as the ratio of the inner diameter of the body portion of the outer conductor terminal and the outer diameter of the crimp portion of the inner conductor terminal. Impedance matching is achieved.

  However, the configuration in which the cylindrical member is attached to the outer periphery of the crimping portion is the cylindrical member before the crimping portion of the inner conductor terminal is crimped to the inner conductor of the coaxial cable in the operation of attaching the cable connector to the coaxial cable. Must first be passed over the insulation of the coaxial cable. For this reason, there has been a problem that the work becomes complicated. In addition, in the configuration in which a member having a predetermined shape is mounted, the member having the predetermined shape is required, so that there is a problem in that the cost of components is increased.

  Moreover, in the structure which crimps | bonds the inner conductor of a coaxial cable to the crimping part of an inner conductor terminal, when the outer diameter of an inner conductor becomes thin, crimping force will become weak and the joint strength of an inner conductor and an inner conductor terminal will fall. Problems can arise. That is, in order to maintain the crimping force by the crimping piece, the crimping piece needs to be in close contact with the inner conductor. However, when the diameter of the inner conductor is reduced, it is difficult to deform the crimping piece so as to be in close contact with the inner conductor. In addition, after the crimping piece is plastically deformed, the crimping piece may try to return to its original shape by a springback. In this case, when the outer diameter of the inner conductor is thin, the crimping force by the crimping piece is greatly reduced even if the crimping piece is only about to return to its original shape.

Japanese Patent Laid-Open No. 2005-197068

  In view of the above circumstances, the problem to be solved by the present invention is to provide a cable connector, a cable with a cable connector, and a method of manufacturing a cable with a cable connector that can achieve impedance matching between the crimping portion of the inner conductor terminal and other portions. Cable connector, cable with cable connector, with cable connector that can achieve impedance matching between the crimping part of the inner conductor terminal and other parts without increasing the cost of parts or complicating work. A cable connector, a cable connector with a cable connector, a cable with a cable connector, and a cable connector capable of maintaining or improving the crimping force by a crimping piece even when the cable conductor (inner conductor) has a small diameter It is providing the manufacturing method of the cable with a connector.

In order to solve the above problems, the present invention provides a cable connector that is attached to a terminal portion of a cable including an inner conductor and an outer conductor that electromagnetically shields the inner conductor, and a crimping piece that crimps the inner conductor. An inner conductor terminal having a crimping portion provided; a dielectric containing the inner conductor terminal; an outer conductor terminal containing the dielectric containing the inner conductor terminal and connected to the outer conductor; and the crimping A crimping member that is crimped to the crimping part by the crimping piece together with the inner conductor, and the crimping member is substantially the same as or equal to the length dimension of the crimping part. The gist of the invention is that it is a substantially rod-shaped member having the above length dimension .

  The present invention includes an inner conductor, a cable having an outer conductor that electromagnetically shields the inner conductor, and the cable connector, and the inner conductor and the member to be crimped are gathered together by the crimping piece into the crimping portion. The gist is to be crimped.

  The member to be bonded is preferably bonded, brazed or spot welded to the inner conductor.

  The present invention is a method of manufacturing a cable with a cable connector, wherein the member to be crimped is bonded to the inner conductor in advance, and then the member to be crimped and the inner conductor terminal are put together by the crimping piece. The gist is to pressure-bond to the part.

  Adhesion, brazing, or spot welding can be suitably applied as a method of joining the member to be crimped to the inner conductor.

  According to the present invention, since the inner conductor of the cable is crimped to the crimping portion of the inner conductor terminal by the crimping piece together with the crimped member, the outer dimension of the crimping portion of the inner conductor terminal can be increased by the amount of the crimped member. it can. For this reason, the outer dimension of the crimping part of the inner conductor terminal can be brought close to the outer dimension of the main body part (= the difference between the outer dimension of the crimping part and the outer dimension of the main body part can be reduced) or substantially the same. Can be dimensioned. Therefore, the ratio between the inner diameter of the outer conductor terminal body and the outer dimension of the inner conductor terminal main body, and the ratio of the outer conductor terminal body diameter and the inner conductor terminal crimp section should be close to each other. Therefore, the impedance irregularity between the main body portion of the inner conductor terminal and the crimping portion can be reduced or eliminated. For this reason, even if it is a case where a high frequency signal is transmitted, the fall of transmission efficiency can be prevented or suppressed.

  Further, the configuration in which the member to be crimped and the inner conductor of the cable are crimped together is substantially the same as the configuration in which the outer diameter of the inner conductor of the cable is increased. Therefore, even when the outer diameter of the inner conductor of the cable is thin, it is possible to prevent or suppress a decrease in the crimping force (bonding strength) due to the crimping piece.

  The length dimension of the member to be crimped is approximately the same as or larger than the length dimension of the crimp piece of the inner conductor terminal (the length dimension here refers to the length dimension in the axial direction of the cable). For example, the member to be crimped and the inner conductor of the cable can be crimped over the entire length of the crimping piece. Therefore, the crimping force (bonding strength) of the inner conductor of the cable by the crimping piece can be improved.

  As the member to be bonded, a bar having a predetermined length can be applied, and it is not necessary to perform special processing or processing on the member to be bonded. For this reason, it is only necessary to cut various commercially available bar materials to a predetermined length. Therefore, compared with a configuration using a cylindrical member for impedance matching or a configuration using a member having a predetermined shape, the cost of components can be reduced.

  According to the present invention, it is only necessary to crimp the member to be crimped and the inner conductor together. For this reason, for example, the number of work steps can be reduced as compared with a configuration in which a tubular member is passed through a cable in advance and attached to the outer periphery of the crimped portion after crimping, such as a configuration using a tubular member. .

  Further, according to the present invention, a method using brazing, an adhesive, or spot welding can be applied to the connection between the inner conductor of the cable and the member to be pressed. Since these operations are simple operations, the operations are not complicated.

BRIEF DESCRIPTION OF THE DRAWINGS It is the external appearance perspective view which showed typically the connection structure of the terminal metal fitting (inner conductor terminal) of the cable connector concerning embodiment of this invention, and the conducting wire (inner conductor of a coaxial cable), (a) is crimping | compression-bonding. The former state is shown, (b) shows a state where a member to be crimped is joined to the cable conductor, and (c) shows a state where the cable conductor is crimped by the crimping piece of the terminal fitting. It is sectional drawing which showed typically the process of crimping | crimping the crimping piece of the terminal metal fitting (inner conductor terminal) of the cable connector concerning embodiment of this invention to the conducting wire (inner conductor of a coaxial cable), (a) The state before crimping is shown, and (b) shows the state after crimping. It is the fragmentary sectional view which showed typically the state by which the terminal metal fitting (inner conductor terminal) of the cable connector concerning embodiment of this invention was mounted | worn with the conducting wire of the cable (inner conductor of a coaxial cable). It is the fragmentary sectional view which showed typically the state (namely, structure of the cable with a cable connector concerning embodiment of this invention) in which the cable connector concerning embodiment of this invention was mounted | worn with the terminal part of the cable. BRIEF DESCRIPTION OF THE DRAWINGS It is the external appearance perspective view which showed typically the connection structure of the terminal metal fitting (inner conductor terminal) of the cable connector concerning embodiment of this invention, and the conducting wire (inner conductor of a coaxial cable), (a) is crimping | compression-bonding. The former state is shown, (b) shows a state where a member to be crimped is joined to the cable conductor, and (c) shows a state where the cable conductor is crimped by the crimping piece of the terminal fitting. It is the fragmentary sectional view which showed typically the state (namely, structure of the cable with a cable connector concerning embodiment of this invention) in which the cable connector concerning embodiment of this invention was mounted | worn with the terminal part of the cable.

  Hereinafter, various embodiments of the present invention will be described in detail with reference to the drawings.

  First, a first embodiment will be described. The cable connector 4 according to the first embodiment of the present invention is a female shield connector. Moreover, the cable connector-attached cable 6a according to the first embodiment of the present invention is obtained by attaching the cable connector 4 according to the first embodiment to the coaxial cable 2.

  FIG. 1 is an external perspective view schematically showing a connection structure between the inner conductor terminal 1a of the cable connector 4 and the inner conductor 21 of the coaxial cable 2 according to the first embodiment of the present invention. (A) shows a state before the inner conductor 21 of the coaxial cable 2 is crimped to the inner conductor terminal 1a and before the member 3 to be crimped is joined to the inner conductor 21 of the coaxial cable 2, b) shows a state in which the member 3 to be crimped is joined to the inner conductor 21 of the coaxial cable 2, and (c) shows a state in which the inner conductor 21 of the coaxial cable 2 is crimped by the crimping piece 12a of the inner conductor terminal 1a. . For convenience of explanation, the side connected to the counterpart connector is referred to as the cable connector and the front end side of each member of the cable connector, and the opposite side is referred to as the rear end side. In FIG. 1, the lower left side is the front end side, and the upper right side is the rear end side.

  A general coaxial cable 2 is applied to the cable 6a with a cable connector according to the first embodiment of the present invention. In particular, as shown in FIG. 1A, a general coaxial cable 2 includes an inner conductor 21 that functions as an electric signal path, an outer conductor 23 that electromagnetically shields the inner conductor 21, and an inner conductor 21 and an outer conductor. It has the insulator 22 interposed between the conductors 23 and the covering material 24 covering the outer conductors 23. The inner conductor 21, the insulator 22, the outer conductor 23, and the covering material 24 are disposed concentrically. Since the outer conductor 23 covers the periphery of the inner conductor 21 without any gap, the inner conductor 21 is electromagnetically shielded by the outer conductor 23. One or a plurality of conducting wires are applied to the inner conductor 21. As the outer conductor 23, a braided wire in which a plurality of conductive wires are knitted in a net shape is applied. A synthetic resin or the like is applied to the insulator 22 and the covering material 24.

  The inner conductor terminal 1a of the cable connector 4 according to the first embodiment of the present invention includes a main body portion 11a for connecting to the inner conductor terminal of the mating connector and a crimping portion 14a for connecting to the inner conductor 21 of the coaxial cable 2. And have. The shape of the main body portion 11a is set according to the shape of the inner conductor terminal of the mating connector. For example, if the cable connector 4 according to the embodiment of the present invention is a female connector, it has a predetermined cross-sectional shape, and the tip end surface is formed in a substantially cylindrical shape that is open so that the inner conductor terminal of the mating connector can be inserted. FIG. 1 shows a configuration in which the main body portion 11a is formed in a rectangular tube shape. The crimping part 14a has a bottom face part 13a and a crimping piece 12a. The crimping piece 12a has a function of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 14a. The crimping piece 12a is a portion formed in a tongue-like shape, and is formed so that the pair of crimping pieces 12a are substantially opposed to both the left and right sides of the bottom surface portion 13a. For this reason, the crimping | compression-bonding part 14a is formed in a cross-sectional substantially U shape as a whole. The inner conductor terminal 1a is made of a metal plate or the like, and is formed into a shape as shown in FIG. 1 by pressing.

  The member 3 to be bonded is a substantially rod-shaped member. The length dimension is set to a dimension that is substantially the same as or longer than the length dimension of the crimping piece 12a of the inner conductor terminal 1a (here, the dimension in the axial direction of the coaxial cable 2). Moreover, although a cross-sectional shape is not specifically limited, In the state crimped | bonded to the crimping part 14a by the crimping piece 12a of the inner conductor terminal 1a, the inner peripheral surface of the crimping part 14a of the inner conductor terminal 1a or the coaxial cable 2 It is preferable to have a shape with few irregularities and corners so that the gap with the internal conductor 21 is small or can be contacted without a gap. For example, a substantially circular cross section or a substantially elliptical cross section can be applied. In FIG. 1, the structure by which the to-be-bonded member 3 is formed in a round bar shape is shown.

  The cross-sectional area of the member 3 to be crimped is set based on the outer dimensions of the crimping portion 14a of the inner conductor terminal 1a after the inner conductor 21 of the coaxial cable 2 and the member 3 to be crimped are crimped. The outer dimensions of the crimping portion 14a of the inner conductor terminal 1a after the inner conductor 21 of the coaxial cable 2 and the crimped member 3 are crimped are the cross-sectional area of the inner conductor 21 of the coaxial cable 2 (the inner conductor 21 is composed of a plurality of conductors. In this case, it depends on the total cross-sectional area of the conducting wire) and the cross-sectional area of the member 3 to be bonded. Therefore, the outer dimensions of the crimping portion 14a of the inner conductor terminal 1a after the inner conductor 21 of the coaxial cable 2 and the member 3 to be crimped are crimped are set in advance, and the cross-sectional area necessary for achieving the set outer dimension. Is calculated and set. A preferable outer dimension of the crimping portion 14a of the inner conductor terminal 1a after the inner conductor 21 of the coaxial cable 2 and the crimped member 3 are crimped will be described later.

  A conductor such as a metal or a conductive resin material can be suitably applied to the material of the member 3 to be bonded. Specifically, copper, aluminum, brass (brass) and the like can be suitably applied. However, an electrically insulating material may be used. For example, various resin materials can be applied.

  In addition, the to-be-bonded member 3 can be obtained by cutting commercially available various metal rods or various resin rods into the predetermined length.

  Then, as shown in FIG. 1B, the member to be crimped 3 is joined to the inner conductor 21 of the coaxial cable 2, and thereafter, as shown in FIG. 1C, the inner conductor 21 of the coaxial cable 2 and the member to be crimped 3 are joined. Are collectively crimped to the crimping portion 14a by the crimping piece 12a.

  Soldering (brazing), bonding using an adhesive, or spot welding (resistance spot welding) is applied to the method of joining the member to be crimped 3 to the inner conductor 21 of the coaxial cable 2. For example, when the inner conductor 21 of the coaxial cable 2 and the member to be crimped 3 are formed of a material that can be easily brazed (soldered) (for example, copper or brass), brazing (soldering) is preferably applied. it can. Further, when the inner conductor of the coaxial cable and the member to be crimped are made of materials that are difficult to solder (for example, aluminum, aluminum alloy, resin material, etc.), adhesion with an adhesive can be suitably applied. As the adhesive, various commercially available adhesives can be applied, and the kind thereof is not limited. However, in order to shorten the working time, it is preferable that it can be bonded in a short time. Further, when the inner conductor 21 of the coaxial cable 2 and the member to be crimped 3 are made of materials that can be welded (for example, formed of a metal material), spot welding can be suitably applied.

  Next, the process of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 14a of the inner conductor terminal 1a will be described. FIG. 2 is a cross-sectional view schematically showing a process of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 14a of the inner conductor terminal 1a. FIG. 2A shows a state before pressure bonding, and FIG. 2B shows a state after pressure bonding. 2A corresponds to FIG. 1B, and FIG. 2B corresponds to FIG. 1C.

  A crimper 92 and an anvil 91 are used for crimping the inner conductor 21 of the coaxial cable 2. As shown in FIG. 2, the crimper 92 has an inner surface of a right and left target shape in which two depressions 921 having the same depth are connected. That is, on the lower surface of the crimper 92 (= the surface facing the anvil 91), two recesses 921 are formed on the left and right, and a protrusion 922 is formed at the central portion where the two recesses 921 are connected. The upper surface of the anvil 91 (= the surface facing the crimper 92) is formed in a curved surface that is recessed in a substantially arc shape.

  First, as shown in FIG. 2A, the crimping portion 14 a of the inner conductor terminal 1 a is disposed between the crimper 92 and the anvil 91. For example, the crimping portion 14 a of the inner conductor terminal 1 a is placed on the upper surface of the anvil 91. At this time, the tip of the crimping piece 12 a is opposed to the crimper 92, and the bottom surface portion 13 a is opposed to the anvil 91. Further, the inner conductor 21 of the coaxial cable 2 to which the member 3 to be crimped is joined is disposed in the crimping portion 14a (the region surrounded by the crimping piece 12a and the bottom surface portion 13a) of the inner conductor terminal 1a. For example, the inner conductor 21 of the coaxial cable 2 to which the member 3 to be crimped is bonded is placed on the bottom surface portion 13a of the crimping portion 14a of the inner conductor terminal 1a.

  Next, as shown in FIG. 2A, the crimper 92 and the anvil 91 are brought close to each other. For example, the crimper 92 is moved in the direction of arrow a. When the crimper 92 approaches the anvil 91, the left and right crimping pieces 12a of the inner conductor terminal 1a come into contact with the inner peripheral surfaces of the left and right depressions 921 of the crimper 92, as shown in FIG. It bends inward along the peripheral surface (so that the tips of the crimping pieces 12a approach each other). Then, the tips of the crimping pieces 12 a come into contact with each other at the center protruding portion 922 of the crimper 92. As a result, the left and right crimping pieces 12a each have a substantially arcuate cross section following the shape of the recess 921 of the crimper 92. Further, the bottom surface portion 13 a of the crimping portion 14 a has a substantially arc shape in cross section following the shape of the upper surface of the anvil 91. As a result, the inner conductor 21 and the member 3 to be crimped of the coaxial cable 2 are crimped to the region sandwiched between the bottom surface portion 13a of the crimping portion 14a and the crimping piece 12a by the crimping piece 12a. And the inner conductor 21 of the coaxial cable 2 and the inner conductor terminal 1a are electrically connected.

  At this time, the inner conductor 21 of the coaxial cable 2 and the member to be pressed 3 are also deformed by the compression force applied by the crimper 92 and the anvil 91. In the configuration in which the member 3 to be bonded is bonded to the inner conductor 21 of the coaxial cable 2 by an adhesive, an adhesive layer is formed on the surface of the inner conductor 21 of the coaxial cable 2 or the surface of the member 3 to be bonded. Even if the inner conductor 21 of the coaxial cable 2 and the member 3 to be pressed are deformed, the adhesive layer is destroyed. For this reason, even when the adhesive is made of an electrically insulating material, the inner conductor 21 of the coaxial cable 2 directly contacts the inner peripheral surface of the crimping portion 14a of the inner conductor terminal 1a. Therefore, the inner conductor 21 of the coaxial cable 2 is electrically connected to the crimping portion 14a of the inner conductor terminal 1a. In addition, since the adhesive layer formed on the surface of the member 3 to be bonded is also destroyed, when the member 3 to be bonded is formed of a conductive material, the inner conductor 21 of the coaxial cable 2 and the member to be bonded are bonded. 3 is electrically connected.

  FIG. 3 is a partial cross-sectional view schematically showing a state where the inner conductor 21 of the coaxial cable 2 is crimped to the crimping portion 14a of the inner conductor terminal 1a. The outer dimension of the crimping part 14a of the inner conductor terminal 1a is preferably close to the outer dimension of the main body part 11a (= small dimensional difference), and more preferably substantially the same as the outer dimension of the main body part 11a. As shown in FIG. 3, the inner conductor 21 of the coaxial cable 2 and the member to be crimped 3 are collectively crimped to the crimping portion 14a of the inner conductor terminal 1a by the crimping piece 12a. For this reason, when compared with the configuration in which only the inner conductor 21 of the coaxial cable 2 is crimped, the outer dimension of the crimping portion 14a becomes larger because the member 3 to be crimped exists. Therefore, the outer dimension of the crimping part 14a can be increased to approach the outer dimension of the main body part 11a, or can be approximately the same as the outer dimension of the main body part 11a. In addition, the external dimension of the crimping | compression-bonding part 14a can be set by adjusting the width direction dimension of the bottom face part 13a, the height dimension of the crimping | compression-bonding piece 12a, and the external dimension (especially cross-sectional area) of the to-be-bonded member 3. Therefore, by adjusting these dimensions, the outer dimension of the crimping part 14a can be made substantially the same as the outer dimension of the main body part 11a.

  Further, according to such a configuration, even when the diameter of the inner conductor 21 of the coaxial cable 2 is small, the coupling strength between the inner conductor 21 of the coaxial cable 2 and the crimping portion 14a of the inner conductor terminal 1a is maintained or Improvements can be made. That is, in the configuration in which the inner conductor 21 of the coaxial cable 2 is crimped by the crimping piece 12a, when the diameter of the inner conductor 21 of the coaxial cable 2 is reduced, the inner conductor 21 is crimped so as to be in close contact with the inner peripheral surface of the crimping portion 14a. It becomes difficult to deform the piece 12a. Further, when the diameter of the inner conductor 21 is reduced, the coupling strength is greatly reduced even when a slight gap is generated in the crimping portion 14a of the inner conductor terminal 1a.

  On the other hand, according to the structure concerning 1st embodiment of this invention, the same effect as the diameter of the inner conductor 21 of the coaxial cable 2 became thick is acquired. When the diameter of the inner conductor 21 of the coaxial cable 2 is increased, the inner conductor 21 of the coaxial cable 2 is easily brought into close contact with the crimping portion 14a of the inner conductor terminal 1a. Even if a slight gap is generated between the inner peripheral surface of the crimping portion 14a of the inner conductor terminal 1a and the inner conductor 21 of the coaxial cable 2, the coupling strength is not significantly reduced. Therefore, it is possible to maintain or improve the coupling strength between the inner conductor 21 of the coaxial cable 2 and the crimping portion 14a of the inner conductor terminal 1a.

  In particular, when the length dimension of the member 3 to be crimped is set to be substantially the same as or longer than the length dimension of the crimping piece 12a, the inner conductor 21 of the coaxial cable 2 is crimped over the entire length of the crimping piece 12a. . Therefore, the coupling strength between the inner conductor 21 of the coaxial cable 2 and the crimping portion 14a of the inner conductor terminal 1a can be improved.

  Moreover, if it is such a structure, what is necessary is just to crimp | bond together the to-be-crimped member 3 and the internal conductor 21 collectively. For this reason, for example, the number of work steps can be reduced as compared with a configuration in which a tubular member is passed through a cable in advance and attached to the outer periphery of the crimped portion after crimping, such as a configuration using a tubular member. .

  And the method using brazing, an adhesive agent, or spot welding can be applied to the joining between the inner conductor of the cable and the member to be pressed. Since these operations are simple operations, the operations are not complicated.

  Next, the overall structure of the cable connector 4 according to the first embodiment of the present invention and the cable 6a with cable connector according to the first embodiment will be described. FIG. 4 is a partial cross-sectional view schematically showing the configuration of the cable connector 4 according to the first embodiment of the present invention and the configuration of the terminal portion of the cable connector-equipped cable 6a according to the first embodiment of the present invention. is there. As shown in FIG. 4, the cable connector 4 according to the first embodiment of the present invention includes an inner conductor terminal 1 a, an outer conductor terminal 41, a dielectric 42, and a member to be crimped 3. The configurations of the inner conductor terminal 1a and the crimping member 3 are as described above.

  The outer conductor terminal 41 has a main body portion 411 that can accommodate the inner conductor terminal 1a and the dielectric 42 and a crimping portion 412 for crimping the coaxial cable 2. The main body 411 is formed in a substantially cylindrical shape having a hollow inside. The crimping portion 412 is provided with a first crimping piece 413 for connecting to the outer conductor 23 of the coaxial cable 2 and a second crimping piece 414 for crimping the coating material 24 of the coaxial cable 2. Each of the first pressure-bonding piece 413 and the second pressure-bonding piece 414 is a portion extending in a tongue-like shape, and is formed such that a pair of pressure-bonding pieces 413 and 414 face each other substantially in parallel. For this reason, the crimping | compression-bonding part 412 is formed in a cross-sectional substantially U shape. The outer conductor terminal 41 is made of a metal plate or the like, and is formed into a shape as shown in FIG. 4 by pressing or the like.

  The dielectric 42 is a member having a function of holding the inner conductor terminal 1a in a state of being electrically insulated from the outer conductor terminal 41. An opening that can accommodate the inner conductor terminal 1a is formed in the dielectric 42. In addition, the shape and dimension of the outer periphery of the dielectric 42 is set so as to be housed inside the main body 411 of the outer conductor terminal 41. For this reason, this dielectric 42 has a substantially cylindrical shape as a whole. The dielectric 42 is formed of a material having a predetermined dielectric constant (for example, a synthetic resin material).

  As shown in FIG. 4, the insulator 22 at the end of the coaxial cable 2 is peeled off, and the internal conductor 21 is exposed. The exposed inner conductor 21 is crimped together with the member 3 to be crimped to the crimping portion 14a by the crimping piece 12a of the inner conductor terminal 1a. Further, the covering material 24 at the end of the coaxial cable 2 is peeled off, and the outer conductor 23 is exposed. The exposed outer conductor 23 is crimped to the crimping portion 412 by the first crimping piece 413 of the outer conductor terminal 41. Further, at the terminal portion of the coaxial cable 2, the covering material 24 is crimped to the crimping portion 412 by the second crimping piece 414 of the outer conductor terminal 41. The dielectric 42 is accommodated in the main body 411 of the outer conductor terminal 41, and the inner conductor terminal 1 a is accommodated in the opening formed in the dielectric 42. For this reason, the inner conductor terminal 1 a is held inside the main body 411 of the outer conductor terminal 41 in a state where it is electrically insulated from the outer conductor terminal 41 by the dielectric 42.

  The procedure for assembling the cable connector 4 according to the first embodiment of the present invention to the coaxial cable 2 (that is, the method for producing the cable with cable connector 6a according to the first embodiment of the present invention) is as follows. First, the covering material 24 and the insulator 22 at the end portion of the coaxial cable 2 are peeled off to expose the outer conductor 23 and to project the inner conductor 21. That is, as shown in FIG. 4, the outer conductor 23, the insulator 22, and the inner conductor 21 are protruded from the tip of the covering material 24, and the outer conductor 23 is made a predetermined length (for example, the first of the outer conductor terminal 41 (Only the length necessary for crimping by the crimping piece 413) is exposed. Then, the insulator 22 is projected from the tip of the outer conductor 23 by a predetermined length, and the inner conductor 21 is projected from the tip of the insulator 22 by a predetermined length (for example, for crimping to the crimping portion 14a of the inner conductor terminal 1a). Project only the required length).

  Next, the member to be crimped 3 is joined to the protruding inner conductor 1a, and the inner conductor 21 and the member to be crimped 3 are crimped to the crimping portion 14a of the inner conductor terminal 1a. These steps are as described above.

  Next, the dielectric 42 is attached to the outside of the inner conductor terminal 1a, and the outer conductor terminal 41 is attached to the outside of the attached dielectric 42. Alternatively, the dielectric 42 may be accommodated first in the main body 411 of the outer conductor terminal 41, and then the inner conductor terminal 1a may be inserted into an opening formed in the dielectric 42. Then, the first crimping piece 413 and the second crimping piece 414 provided on the crimping portion 412 of the outer conductor terminal 41 are caulked (= plastically deformed), and the outer conductor 23 of the coaxial cable 2 is connected by the first crimping piece 413. And the covering material 24 of the coaxial cable 2 is crimped by the second crimping piece 414. When the outer conductor 23 of the coaxial cable 2 is crimped by the first crimping piece 413, the outer conductor terminal 41 and the outer conductor 23 of the coaxial cable 2 are electrically connected. The first crimping piece 413 crimps the outer conductor 23 of the coaxial cable 2, and the second crimping piece 414 crimps the coating material 24 of the coaxial cable 2 so that the outer conductor terminal 41 is coupled to the coaxial cable 2. In addition, a predetermined coupling strength is obtained between the outer conductor terminal 41 and the coaxial cable 2.

  Through such steps, the coaxial cable 2 (the cable with cable connector 6a according to the first embodiment) to which the cable connector 4 according to the first embodiment of the present invention is attached is obtained.

  According to such a configuration, the difference between the outer dimension of the main body part 11a of the inner conductor terminal 1a and the main body dimension of the crimping part 12a can be reduced or substantially the same. Therefore, the ratio of the inner diameter of the main body portion 411 of the outer conductor terminal 41 to the outer dimension of the main body portion 11a of the inner conductor terminal 1a, and the outer diameter of the main body portion 411 of the outer conductor terminal 41 and the outer crimping portion 14a of the inner conductor terminal 1a. The difference from the dimensional ratio can be reduced, or the ratio can be set to approximately the same value. Therefore, can the impedance irregularity be reduced between the main body portion 11a of the inner conductor terminal 1a and the crimping portion 14a? Or it can be solved.

  Further, as the member 3 to be bonded, a commercially available bar material cut into a predetermined length can be applied. And it is not necessary to perform special processing and processing on the member 3 to be bonded. For this reason, in order to achieve impedance matching, the component cost can be reduced as compared with a configuration using a cylindrical sleeve or a configuration using a member having a predetermined shape.

  In the first embodiment, a female shield connector is shown as the cable connector 4, but a male shield connector is also applicable. Therefore, as a second embodiment of the present invention, a configuration to which a male shield connector is applied will be briefly described below.

  FIG. 5 is an external perspective view schematically showing a connection structure between the inner conductor terminal 1b of the cable connector 5 and the inner conductor 21 of the coaxial cable 2 according to the second embodiment of the present invention. (A) shows a state before the inner conductor 21 of the coaxial cable 2 is crimped to the inner conductor terminal 1b, and (b) shows a state where the member 3 to be crimped is joined to the inner conductor 21 of the coaxial cable 2. (C) shows the state where the inner conductor 21 of the coaxial cable 2 is crimped by the crimping piece 12b of the inner conductor terminal 1b.

  The inner conductor terminal 1 b includes a main body portion 11 b for connecting to the inner conductor terminal of the counterpart connector, and a crimping portion 14 b for connecting to the inner conductor 21 of the coaxial cable 2. The shape of the main body portion 11b is set according to the shape of the inner conductor terminal of the counterpart connector. If the cable connector 5 according to the second embodiment of the present invention is a male connector, it is formed in a substantially rod shape or a substantially cylindrical shape having a predetermined cross-sectional shape. FIG. 5 shows a configuration in which the main body portion 11b is formed in a quadrangular prism shape and the tip portion is formed in a tapered shape so that it can be easily inserted into the inner conductor terminal of the mating connector. The crimping part 14b has a bottom face part 13b and a crimping piece 12b. The crimping piece 12 b is for crimping the inner conductor 21 of the coaxial cable 2. The crimping piece 12b is a portion formed in a tongue-like shape, and the pair of crimping pieces 12b are formed so as to be opposed substantially parallel to the left and right sides of the bottom surface portion 13b. For this reason, the crimping | compression-bonding part 14b is formed in a cross-sectional substantially U shape as a whole. The inner conductor terminal 1b is made of a metal plate or the like, and is formed into a shape as shown in FIG. 5 by pressing.

  The same member as the member 3 to be bonded of the cable connector 4 according to the first embodiment is applied to the member 3 to be bonded. Therefore, explanation is omitted.

  Then, the member 3 to be bonded is joined to the inner conductor 21 of the coaxial cable 2 as shown in FIG. The same method as in the first embodiment is applied as the bonding method. Then, as shown in FIG. 5C, the inner conductor 21 of the coaxial cable 2 to which the member 3 to be crimped is joined is crimped to the crimping portion 14b by the crimping piece 12b of the inner conductor terminal 1b. The same process as the first embodiment can be applied to this crimping process (see FIG. 2).

  FIG. 6 is a portion schematically showing the configuration of the cable connector 5 according to the second embodiment of the present invention and the configuration of the cable connector and the terminal portion of the cable 6b with cable connector according to the second embodiment of the present invention. It is sectional drawing. As shown in FIG. 6, the cable connector 5 according to the second embodiment of the present invention includes an inner conductor terminal 1 b, an outer conductor terminal 51, a dielectric 52, and a member to be crimped 3. The configurations of the inner conductor terminal 1b and the member 3 to be bonded are as described above.

  The outer conductor terminal 51 includes a main body portion 511 that can accommodate the inner conductor terminal 1b and the dielectric 52, and a crimping portion 512 for crimping the coaxial cable 2. The main body 511 is formed in a substantially cylindrical shape having a hollow inside. The crimping portion 512 is provided with a first crimping piece 513 for connecting to the outer conductor 23 of the coaxial cable 2 and a second crimping piece 514 for crimping the coating material 24 of the coaxial cable 2. Each of the first pressure-bonding piece 513 and the second pressure-bonding piece 514 is a portion extending like a tongue piece, and is formed so that the pair of pressure-bonding pieces 513 and 514 are substantially opposed to each other. For this reason, the crimping | compression-bonding part 512 is formed in a cross-sectional substantially U shape. The outer conductor terminal 51 is made of a metal plate or the like, and is formed into a shape as shown in FIG. 6 by pressing or the like.

  The dielectric 52 is a member having a function of holding the inner conductor terminal 1b in a state of being electrically insulated from the outer conductor terminal 51. An opening that can accommodate the inner conductor terminal 1 b is formed inside the dielectric 52. Further, the shape and dimensions of the outer periphery of the dielectric 52 are set so as to be housed inside the main body 511 of the outer conductor terminal 51. For this reason, the dielectric 52 as a whole has a substantially cylindrical shape. The dielectric 52 is formed of a material having a predetermined dielectric constant (for example, a synthetic resin material).

  As shown in FIG. 6, the insulator 22 is stripped off at the end of the coaxial cable 2 to expose the internal conductor 21. The exposed inner conductor 21 is crimped to the crimping portion 14b together with the member 3 to be crimped by the crimping piece 12b of the inner conductor terminal. Further, the covering material 24 is peeled off at the end portion of the coaxial cable 2, and the external conductor 23 is exposed. The exposed outer conductor 23 is crimped to the crimping portion 512 by the first crimping piece 513 of the outer conductor terminal 51. Further, at the terminal portion of the coaxial cable 2, the covering material 24 is crimped to the crimping portion 512 by the second crimping piece 514 of the outer conductor terminal 51. Further, the dielectric 52 is accommodated in the main body 511 of the outer conductor terminal 51, and the inner conductor terminal 1 b is accommodated in the opening formed in the dielectric 52. For this reason, the inner conductor terminal 1 b is held inside the main body of the outer conductor terminal 51 in a state where it is electrically insulated from the outer conductor terminal 51 by the dielectric 52.

  The procedure for assembling the cable connector 5 according to the second embodiment of the present invention to the coaxial cable 2 can be the same as the procedure for the cable connector 4 according to the first embodiment. Therefore, explanation is omitted.

  Thus, even if it is a male type shield connector, the structure similar to a female type shield connector is applicable. And the effect similar to the cable connector 4 concerning 1st embodiment can be show | played.

  As mentioned above, although various embodiment of this invention was described in detail, this invention is not limited to each said embodiment at all, and various modification | change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the cable connector applied to the coaxial cable has been described. However, the present invention can also be applied to cable connectors of other various cables.

1a, 1b Inner conductor terminal 11a, 11b Main body part 12a, 12b Crimp piece 13a, 13b Bottom face part 14a, 14b Crimp part 2 Coaxial cable 21 Inner conductor 22 Insulator 23 Outer conductor 24 Covering material 3 Crimped member 4 Cable connector according to one embodiment 41 Outer conductor terminal 411 Main body part 412 Crimp part 413 First crimping piece 414 Second crimping piece 42 Dielectric 5 Cable connector according to the second embodiment of the present invention 51 Outer conductor terminal 511 Main body Part 512 Crimping part 513 First crimping piece 514 Second crimping piece 52 Dielectric 6a Cable 6b with cable connector according to the first embodiment of the present invention Cable 91 with cable connector according to the second embodiment of the present invention Anvil 92 Crimper 921 Depression 922 Projection

Claims (5)

A cable connector attached to a terminal portion of a cable including an inner conductor and an outer conductor that electromagnetically shields the inner conductor, and an inner conductor terminal having a crimping portion provided with a crimping piece for crimping the inner conductor; A dielectric that accommodates the inner conductor terminal; an outer conductor terminal that accommodates the dielectric that accommodates the inner conductor terminal; and is connected to the outer conductor; A member to be crimped to the crimping part by the crimping piece together with a conductor , and
The cable connector according to claim 1, wherein the member to be crimped is a substantially rod-shaped member having a length dimension substantially equal to or greater than a length dimension of the crimping portion . A cable having an inner conductor and an outer conductor that electromagnetically shields the inner conductor, and the cable connector according to claim 1 , wherein the inner conductor and the member to be crimped are gathered together by the crimping piece and the crimping portion. Cable with cable connector, characterized by being crimped to. The cable with a cable connector according to claim 2 , wherein the member to be crimped is bonded, brazed, or spot welded to the inner conductor. It is a manufacturing method of the cable with a cable connector of Claim 3 , Comprising: The said to-be-crimped member is joined to the said internal conductor beforehand, The said to-be-crimped member and the said inner conductor terminal are put together by the said crimping piece after an appropriate time. A method for manufacturing a cable with a cable connector, wherein the cable is crimped to a crimping portion. The method for manufacturing a cable with a cable connector according to claim 4 , wherein the member to be crimped is joined to the inner conductor by bonding, brazing, or spot welding.

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