JP5287314B2 - Cable connector and cable with cable connector - Google Patents

Description

  The present invention relates to a cable connector and a cable with a cable connector, and particularly preferably relates to a cable connector in which impedance matching is achieved and a cable to which the cable connector is attached (that is, a cable with a cable connector). .

  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.

  In general, a cable connector attached to a terminal portion of a coaxial cable generally includes an inner conductor terminal electrically connected to an inner conductor, an outer conductor terminal electrically connected to an outer conductor, an inner conductor terminal, and an outer conductor terminal. And a dielectric (which is formed of a material having a predetermined dielectric constant) interposed between the conductor terminals. 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 a part where impedance is not matched (impedance irregularity) in the transmission path of the high-frequency signal, signal reflection will occur in that part, which may cause problems such as reduced transmission efficiency and noise. is there. 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. Further, it is preferable that there is no impedance irregular portion inside the cable connector.

  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 main body portion of the inner conductor terminal, and as a result, impedance irregularity occurs 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 crimp portion of the inner conductor terminal 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, the configuration using the cylindrical member has a problem in that the cost of components is increased.

Japanese Patent Laid-Open No. 2005-197068

  In view of the above situation, the problem to be solved by the present invention is that the impedance irregularity between the crimping part of the inner conductor terminal and the main body part can be reduced or the impedance irregularity can be eliminated (= impedance). To provide a cable connector and a cable with a cable connector, and in particular, between the crimping portion of the inner conductor terminal and the main body portion while maintaining the crimping force of the cable in the crimping portion of the inner conductor terminal. Providing cable connectors and cables with cable connectors that can reduce impedance irregularities or eliminate impedance irregularities, or increase the cost of components and complicate assembly work Reduce impedance imbalance between the crimping part of the terminal and the main body DOO you can do, or is to provide a cable connector and cable connector with the cable which can eliminate the impedance mismatch.

  In order to solve the above problems, the present invention provides a cable connector that is attached to a terminal portion of a shielded cable that has an inner conductor and has an outer conductor that electromagnetically shields the inner conductor, and crimps the inner conductor. An inner conductor terminal having a crimping portion on which a crimping piece is provided; a dielectric that accommodates the inner conductor terminal; and an outer body that accommodates the dielectric that accommodates the inner conductor terminal and is connected to an outer conductor of the shielded cable. And a conductor terminal, and the gist is that solder is placed on the outer periphery of the crimping portion in order to increase the electrical external dimension of the crimping portion.

  The present invention also includes a shielded cable having an inner conductor and an outer conductor that electrically shields the inner conductor, and the cable connector according to claim 1, wherein the inner conductor of the cable is the crimping piece. The solder is attached to the outer periphery of the crimp portion of the inner conductor terminal to which the inner conductor is crimped, and solder for increasing the electrical outer diameter of the crimp portion. It is what.

  According to the present invention, by placing solder on the outer periphery of the crimp portion of the inner conductor terminal, the electrical external dimension (cross-sectional dimension) of the crimp portion of the inner conductor terminal can be increased. Thereby, the electrical external dimension of the crimping | compression-bonding part of an inner conductor terminal can be brought close to the outer dimension of the main-body part of an inner conductor terminal, or can be made into the substantially same dimension.

  For this reason, the difference of the impedance in the crimping | compression-bonding part of an inner conductor terminal and the impedance in a main-body part can be made small, or both impedance can be made substantially the same. Therefore, the impedance irregularity can be reduced between the crimping part and the crimping part of the inner conductor terminal, or the impedance irregularity can be eliminated (= impedance matching can be achieved).

  That is, the impedance at the crimping part of the inner conductor terminal is the external dimension (= electrical external dimension of the crimping part of the inner conductor terminal) combined with the crimping part of the inner conductor terminal and the mounted solder, and the outer conductor terminal. It depends on the ratio to the inner diameter of the main body. On the other hand, for example, the impedance in the main body portion of the inner conductor terminal depends on the ratio between the external dimension of the main body portion of the inner conductor terminal and the inner diameter dimension of the main body portion of the outer conductor terminal. And by placing solder on the outer periphery of the inner conductor terminal crimping part, the electrical external dimension of the inner conductor terminal crimping part can be increased, and the difference from the outer dimension of the inner conductor terminal body part can be reduced. Or approximately the same dimensions. According to such a configuration, the ratio of the external dimension combining the crimp portion of the inner conductor terminal and the mounted solder and the inner diameter dimension of the main body portion of the outer conductor terminal, and the outer dimension of the main body portion of the inner conductor terminal The difference from the ratio of the outer conductor terminal to the inner diameter of the main body can be reduced, or these ratios can be made substantially the same.

  Therefore, the difference between the impedance in the main body portion of the inner conductor terminal and the impedance in the crimping portion of the inner conductor terminal can be reduced, or these impedances can be made substantially the same. For this reason, the impedance irregularity between the main body portion of the inner conductor terminal and the crimping portion can be reduced, or the impedance irregularity can be eliminated (= impedance matching can be achieved). Therefore, according to the present invention, even when a high-frequency signal is transmitted, it is possible to prevent or suppress a decrease in transmission efficiency.

  According to the present invention, by mounting solder on the outer periphery of the crimping portion of the inner conductor terminal, the electrical external dimension of the crimping portion of the inner conductor terminal can be expanded. That is, the electrical external dimension of the crimping portion of the inner conductor terminal can be set without being limited by the actual external dimension. For this reason, the actual dimensional shape of the crimping portion of the inner conductor terminal can be made the optimum dimensional shape for crimping the inner conductor of the coaxial cable. Therefore, while maintaining the crimping force of the cable at the crimping portion of the inner conductor terminal, the impedance irregularity between the crimping portion of the inner conductor terminal and the main body portion can be reduced or the impedance irregularity can be eliminated. .

  According to the present invention, after the inner conductor of the coaxial cable is crimped to the crimping portion of the inner conductor terminal, it is only necessary to place solder on the outer periphery of the crimping portion of the inner conductor terminal. For this reason, compared with the structure using a cylindrical member, the number of parts can be reduced and the cost of parts can be reduced. Further, in the configuration using the cylindrical member, it is necessary to pass the cylindrical member through the cable in advance, but in the present invention, such a need is not required. Therefore, the work content can be simplified and the number of work steps can be reduced as compared with the configuration using the cylindrical member.

It is the fragmentary sectional view which showed typically the structure of the cable connector concerning 1st embodiment of this invention, and the structure of the terminal part of the cable with a cable connector concerning 1st embodiment of this invention. It is the external appearance perspective view which showed typically the structure of an inner conductor terminal, and the connection structure of an inner conductor terminal and the inner conductor of a coaxial cable, (a) is before the inner conductor of a coaxial cable is crimped | bonded to an inner conductor terminal. (B) shows the state where the inner conductor of the coaxial cable is crimped to the crimping part of the inner conductor terminal, and (c) shows the state where solder is placed on the outer periphery of the crimping part of the inner conductor terminal. Indicates. It is sectional drawing which showed typically the process of crimping | bonding the inner conductor of a coaxial cable to the crimping part of an inner conductor terminal, (a) shows the state before crimping, (b) shows the state after crimping. . It is the fragmentary sectional view which showed typically the structure of the cable connector concerning 2nd embodiment of this invention, and the structure of the terminal part of the cable with a cable connector concerning 2nd embodiment of this invention. It is the external appearance perspective view which showed typically the connection structure of the inner conductor terminal of the cable connector concerning 2nd embodiment of this invention, and the inner conductor of a coaxial cable, (a) is coaxial to the crimping | compression-bonding part of an inner conductor terminal. The state before crimping the inner conductor of the cable is shown, (b) shows the state where the inner conductor of the coaxial cable is crimped to the crimp portion of the inner conductor terminal, and (c) is the inner conductor where the inner conductor is crimped. The state in which solder is placed on the outer periphery of the crimping portion of the terminal is shown.

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

  First, a cable connector and a cable with a cable connector according to a first embodiment of the present invention will be described. FIG. 1 is a partial cross-sectional view schematically showing the configuration of the cable connector 1a according to the first embodiment of the present invention and the configuration of the terminal portion of the cable 4a with cable connector according to the first embodiment of the present invention. is there. The cable connector 1a according to the first embodiment of the present invention is a female shield connector. The cable 4a with a cable connector according to the first embodiment of the present invention includes the shielded cable 2 and the cable connector 1a according to the first embodiment of the present invention, and the first embodiment of the present invention at the terminal portion of the shielded cable 2. The cable connector 1a is attached.

  For convenience of explanation, the side connected to the counterpart connector is referred to as the front end side of each member of the cable connector 1a and the cable connector 1a according to the first embodiment of the present invention, and the opposite side is referred to as the rear end side. In FIG. 1, the left side is the front end side, and the right side is the rear end side.

  A coaxial cable having a general configuration is applied to the shielded cable 2. Briefly described is as follows. As shown in FIG. 1, the coaxial cable 2 includes an internal conductor 21 that functions as an electrical signal path, an external conductor 23 that electromagnetically shields the internal conductor 21, and an intermediary between the internal conductor 21 and the external conductor 23. And an insulating material 22 that covers the outer conductor 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. For the internal conductor 21, a plurality of conductive wires or a single conductive wire is applied. 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.

  As shown in FIG. 1, the cable connector 1a according to the first embodiment of the present invention includes an inner conductor terminal 11a, an outer conductor terminal 12a, and a dielectric 13a.

  The outer conductor terminal 12a includes a main body portion 121a that houses the inner conductor terminal 11a and the dielectric 13a, and a crimping portion 122a for crimping the coaxial cable 2. The main body 121a is formed in a substantially cylindrical shape having a hollow inside. The crimping portion 122a is provided with a first crimping piece 123a for crimping the outer conductor 23 of the coaxial cable 2 and a second crimping piece 124a for crimping the coating material 24 of the coaxial cable 2. The first pressure-bonding piece 123a and the second pressure-bonding piece 124a are portions extending in a tongue-like shape, and are formed so that the first pressure-bonding pieces 123a face each other substantially in parallel. The crimping pieces 124a are formed so as to face each other substantially in parallel. For this reason, the crimping | compression-bonding part 122a is formed in a cross-sectional substantially U shape. The outer conductor terminal 12a is made of a metal plate or the like, and is formed into a shape as shown in FIG. 1 by pressing or the like.

  The dielectric 13a is a member having a function such as holding the inner conductor terminal 11a electrically insulated from the outer conductor terminal 12a. An opening that can accommodate the inner conductor terminal 11a is formed in the dielectric 13a. In addition, the shape and dimension of the outer periphery of the dielectric 13a is set so as to be housed inside the main body 121a of the outer conductor terminal 12a. For this reason, the dielectric 13a has a substantially cylindrical shape as a whole. The dielectric 13a is formed of a material having a predetermined dielectric constant (for example, a synthetic resin material).

  FIG. 2 is an external perspective view schematically showing the configuration of the inner conductor terminal 11 a and the connection structure between the inner conductor terminal 11 a and the inner conductor 21 of the coaxial cable 2. (A) shows the state before the inner conductor 21 of the coaxial cable 2 is crimped to the inner conductor terminal 11a, and (b) shows the inner conductor 21 of the coaxial cable 2 to the crimping portion 112a of the inner conductor terminal 11a. (C) shows a state in which solder is placed on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a.

  The inner conductor terminal 11a has a main body portion 111a for connecting to the inner conductor terminal of the counterpart connector, and a crimping portion 112a for crimping the inner conductor 21 of the coaxial cable 2. The shape of the main body 111a is set according to the shape of the inner conductor terminal of the mating connector. For example, if the cable connector 1a according to the first embodiment of the present invention is a female connector, the main body portion 111a of the inner conductor terminal 11a has a predetermined cross-sectional shape, and the tip surface can insert the inner conductor terminal of the mating connector. It is formed in a substantially cylindrical shape opened in Specifically, for example, as shown in FIG. 2, the main body portion 111a of the inner conductor terminal 11a is formed in a rectangular tube shape having an open end. The crimping part 112a of the inner conductor terminal 11a has a bottom part 114a and a crimping piece 113a. The crimping piece 113a of the inner conductor terminal 11a has a function of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 112a. The crimping piece 113a of the inner conductor terminal 11a is a portion formed in a tongue-like shape, and the pair of crimping pieces 113a are formed so as to be substantially opposed to the left and right sides of the bottom surface portion 114a. For this reason, the crimping part 112a of the inner conductor terminal 11a is formed in a substantially U-shaped cross section as a whole. The inner conductor terminal 11a is made of a metal plate or the like, and is formed into a shape as shown in FIG. 2 (particularly see FIG. 2 (a)) by pressing.

  The assembly structure of the cable connector 1a according to the first embodiment of the present invention having such a member and the assembly structure of the cable 4a with cable connector according to the first embodiment are as follows. A description will be given with reference to FIG. 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 to the crimping part 112a of the inner conductor terminal 11a by the crimping piece 113a of the inner conductor terminal 11a. The solder 5a is placed on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a to which the inner conductor 21 is crimped. 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 122a of the outer conductor terminal 12a by the first crimping piece 123a of the outer conductor terminal 12a. Further, at the terminal portion of the coaxial cable 2, the covering material 24 is crimped to the crimping portion 122a of the outer conductor terminal 12a by the second crimping piece 124a of the outer conductor terminal 12a. The dielectric 13a is accommodated in the main body 121a of the outer conductor terminal 12a, and the inner conductor terminal 11a is accommodated in the opening formed in the dielectric 13a. Therefore, the inner conductor terminal 11a is held inside the main body 121a of the outer conductor terminal 12a while being electrically insulated from the outer conductor terminal 12a by the dielectric 13a.

  Next, the procedure for assembling the cable connector 1a according to the first embodiment of the present invention to the coaxial cable 2 (that is, the method for manufacturing the cable 4a with cable connector according to the first embodiment of the present invention) will be described.

  First, as shown in FIG. 2A, the covering material 24 and the insulator 22 at the end of the coaxial cable 2 are peeled off to expose the external conductor 23 and to project the internal conductor 21. Specifically, 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 has a predetermined length (for example, the first crimping piece 123 a of the outer conductor terminal 12 a. Expose only the length necessary for crimping by). Then, the insulator 22 protrudes from the tip of the outer conductor 23 by a predetermined length, and further, the inner conductor 21 is protruded from the tip of the insulator 22 by a predetermined length (for example, for crimping to the crimping portion 112a of the inner conductor terminal 11a). Project only the required length).

  Next, as shown in FIG. 2B, the protruding inner conductor 21 is crimped to the crimping portion 112a of the inner conductor terminal 11a. Thereafter, as shown in FIG. 2C, the solder 5a is placed on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a to which the inner conductor 21 is crimped.

  This will be described in detail as follows. FIG. 3 is a cross-sectional view schematically showing a process of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 112a of the inner conductor terminal 11a. FIG. 3A shows a state before pressure bonding, and FIG. 3B shows a state after pressure bonding. 3A corresponds to FIG. 2A, and FIG. 3B corresponds to FIG. 2B.

  As shown in FIGS. 3A and 3B, a crimper 92 and an anvil 91 are used in the step of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 112a of the inner conductor terminal 11a. The crimper 92 has an inner surface of a right and left target shape in which two depressions 921 having substantially 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. 3A, the crimping portion 112 a of the inner conductor terminal 11 a is disposed between the crimper 92 and the anvil 91. For example, the crimping part 112 a of the inner conductor terminal 11 a is placed on the upper surface of the anvil 91. At this time, the tip of the crimping piece 113 a is opposed to the crimper 92, and the bottom surface portion 114 a is opposed to the anvil 91. Further, the inner conductor 21 of the coaxial cable 2 is disposed on the crimping portion 112a of the inner conductor terminal 11a. For example, the inner conductor 21 of the coaxial cable 2 is placed on the bottom surface portion 114a of the crimping portion 112a of the inner conductor terminal 11a.

  Next, the crimper 92 and the anvil 91 are brought close to each other. For example, the crimper 92 is moved in the direction of the arrow a (see FIG. 3A). When the crimper 92 approaches the anvil 91, the left and right crimping pieces 113a of the inner conductor terminal 11a come into contact with the inner peripheral surfaces of the left and right depressions 921 of the crimper 92, as shown in FIG. Bend along the peripheral surface toward the inside (so that the tips of the crimping pieces 113a approach each other). Then, the tips of the crimping pieces 113 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 113a each have a substantially arcuate cross section following the shape of the recess 921 of the crimper 92. Further, the bottom surface portion 114 a of the crimping portion 112 a of the inner conductor terminal 11 a has a substantially circular arc shape in cross section following the shape of the upper surface of the anvil 91. As a result, the inner conductor 21 of the coaxial cable 2 is crimped by the crimping piece 113a of the inner conductor terminal 11a to a region surrounded by the bottom surface part 114a of the crimping part 112a of the inner conductor terminal 11a and the crimping piece 113a. And the inner conductor 21 and the inner conductor terminal 11a of the coaxial cable 2 are electrically connected.

  After the inner conductor 21 of the coaxial cable 2 is crimped to the crimping part 112a of the inner conductor terminal 11a, the solder 5a is placed on the outer periphery of the crimping part 112a of the inner conductor terminal 11a. Specifically, the solder 5a is placed on the outer periphery of the crimping piece 113a caulked in a substantially arc shape in cross section.

  The method for placing the solder 5a on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a is not particularly limited. Various methods such as hot-air soldering and infrared soldering can be applied in addition to a method using a general soldering iron or a soldering gun. Also, the type of solder to be arranged is not particularly limited.

  Next, as shown in FIG. 1, the dielectric 13a is attached to the outer periphery of the inner conductor terminal 11a, and the outer conductor terminal 12a is attached to the outer periphery of the attached dielectric 13a. Alternatively, the dielectric 13a may be accommodated in the body 121a of the outer conductor terminal 12a first, and then the inner conductor terminal 11a may be inserted into an opening formed in the dielectric 13a. Then, the first crimping piece 123a and the second crimping piece 124a provided in the crimping part 122a of the outer conductor terminal 12a are caulked (= plastically deformed), and the outer conductor 23 of the coaxial cable 2 is formed by the first crimping piece 123a. And the covering material 24 of the coaxial cable 2 is crimped by the second crimping piece 124a. When the outer conductor 23 of the coaxial cable 2 is crimped to the crimping portion 122a of the outer conductor terminal 12a by the first crimping piece 123a, the outer conductor terminal 12a and the outer conductor 23 of the coaxial cable 2 are electrically connected. The first crimping piece 123 a crimps the outer conductor 23 of the coaxial cable 2, and the second crimping piece 124 a crimps the coating material 24 of the coaxial cable 2, so that the outer conductor terminal 12 a is coupled to the coaxial cable 2. In addition, a predetermined coupling strength can be obtained between the outer conductor terminal 12a and the coaxial cable 2.

  Through such steps, the coaxial cable 2 (= the cable with cable connector 4a according to the first embodiment) to which the cable connector 1a according to the first embodiment of the present invention is attached is obtained.

  The impedance at the crimping part 112a of the inner conductor terminal 11a depends on the ratio between the external dimension (cross-sectional dimension) of the crimping part 112a of the inner conductor terminal 11a and the inner diameter dimension of the main body part 121a of the outer conductor terminal 12a. Moreover, the impedance in the main body part 111a of the inner conductor terminal 11a depends on the ratio between the external dimension of the main body part 111a of the inner conductor terminal 11a and the inner diameter dimension of the main body part 121a of the outer conductor terminal 12a. For this reason, if the external dimension of the crimping part 112a of the inner conductor terminal 11a is smaller than the outer dimension of the main body part 111a, the impedance differs between the crimping part 122a of the inner conductor terminal 11a and the main body part 111a.

  The solder 5a is a conductive material, and the solder 5a placed on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a is electrically connected to the inner conductor terminal 11a. For this reason, the configuration in which the solder 5a is arranged on the outer periphery of the crimping part 112a of the inner conductor terminal 11a is electrically increased by the cross-sectional dimension of the solder 5a on which the external dimension of the crimping part 112a of the inner conductor terminal 11a is arranged. Is equal to That is, by placing the solder 5a on the outer periphery of the crimping portion 112a of the inner conductor terminal 11a, the electrical external dimension of the crimping portion 112a of the inner conductor terminal 11a can be increased. Therefore, the electrical external dimension of the crimp part 112a of the inner conductor terminal 11a (= the external dimension obtained by combining the crimp part 112a of the inner conductor terminal 11a and the solder 5a) is set to the external dimension of the main body part 111a of the inner conductor terminal 11a. You can get closer.

  For this reason, the difference between the electrical external dimension of the crimping part 112a of the inner conductor terminal 11a and the outer dimension of the main body part 111a of the inner conductor terminal 11a can be reduced, and the impedance at the crimping part 112a of the inner conductor terminal 11a can be reduced. The difference between the impedance of the inner conductor terminal 11a and the main body 111a can be reduced. Therefore, the impedance irregularity between the crimping part 112a and the main body part 111a of the inner conductor terminal 11a can be reduced.

  In particular, when the solder 5a is mounted on the crimping portion 112a, and the outer dimensions of the crimping portion 112a and the solder 5a are made substantially the same as the outer dimensions of the main body portion 111a of the inner conductor terminal 11a, the inner conductor terminal 11a The electrical external dimension of the crimping part 112a is substantially equal to the external dimension of the main body part 111a of the inner conductor terminal 11a. For this reason, the impedance in the crimping | compression-bonding part 112a of the inner conductor terminal 11a and the impedance in the main-body part 111a of the inner conductor terminal 11a can be made substantially the same.

  According to such a configuration, the impedance irregularity can be reduced or the impedance irregularity can be eliminated between the main body portion 111a and the crimping portion 112a of the inner conductor terminal 11a. Accordingly, even when a high frequency signal is transmitted, it is possible to prevent or suppress the occurrence of signal reflection between the crimping portion 112a of the inner conductor terminal 11a and the main body portion 111a, thereby preventing a decrease in transmission efficiency. Or it can be suppressed.

  In the cable connector according to the first embodiment of the present invention, the electrical external dimension (particularly the cross-sectional dimension) of the crimping portion 112a of the inner conductor terminal 11a is adjusted by adjusting the amount of solder 5a to be mounted. Can do. For this reason, the actual size and shape of the crimping part 112a of the inner conductor terminal 11a and the electrical external dimension can be set without affecting each other. Accordingly, the actual size of the bottom surface portion 114a of the crimping portion 112a and the crimping piece 113a of the inner conductor terminal 11a is set to an optimum size and shape for crimping the inner conductor 21 of the coaxial cable 2, and the inner conductor terminal 11a is crimped. The electrical external dimension of the portion 112a can be adjusted. For this reason, while maintaining the physical crimping strength and electrical connection reliability of the inner conductor 21 of the coaxial cable 2 in the crimping part 112a of the inner conductor terminal 11a, the crimping part 112a and the main body part 111a of the inner conductor terminal 11a are maintained. The impedance irregularity can be reduced, or the impedance irregularity can be eliminated.

  Although the female shield connector is shown as the cable connector 1a according to the first embodiment of the present invention, 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. 4 is a partial cross-sectional view schematically showing the configuration of the cable connector 1b according to the second embodiment of the present invention and the configuration of the terminal portion of the cable 4b with cable connector according to the second embodiment of the present invention. is there. As shown in FIG. 4, the cable connector 1b according to the second embodiment of the present invention includes an inner conductor terminal 11b, an outer conductor terminal 12b, and a dielectric 13b.

  The outer conductor terminal 12b has a main body 121b that can accommodate the inner conductor terminal 11b and the dielectric 13b, and a crimping part 122b for crimping the coaxial cable 2. The main body portion 121b of the outer conductor terminal 12b is formed in a substantially cylindrical shape having a hollow inside. On the crimping portion 122b of the outer conductor terminal 12b, a first crimping piece 123b for crimping the outer conductor 23 of the coaxial cable 2 and a second crimping piece 124b for crimping the coating material 24 of the coaxial cable 2 are provided. Is provided. Each of the first pressure-bonding piece 123b and the second pressure-bonding piece 124b is a portion extending in the shape of a tongue piece. The two first pressure-bonding pieces 123b are formed so as to be substantially opposed to each other, and the two second pressure-bonding pieces 124b are formed to be substantially opposed to each other. For this reason, the crimping part 122b of the outer conductor terminal 12b is formed in a substantially U-shaped cross section. The outer conductor terminal 12b 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 13b is a member having a function such as holding the inner conductor terminal 11b electrically insulated from the outer conductor terminal 12b. An opening capable of accommodating the inner conductor terminal 11b is formed in the dielectric 13b. Further, the shape and dimensions of the outer periphery of the dielectric 13b are set so as to be housed inside the main body 121b of the outer conductor terminal 12b. For this reason, this dielectric 13b has a substantially cylindrical shape as a whole. The dielectric 13b is formed of a material having a predetermined dielectric constant (for example, a synthetic resin material).

  FIG. 5 is an external perspective view schematically showing a connection structure between the inner conductor terminal 11b of the cable connector 1b and the inner conductor 21 of the coaxial cable 2 according to the second embodiment of the present invention. (A) shows the state before crimping the inner conductor 21 of the coaxial cable 2 to the crimping part 112b of the inner conductor terminal 11b, and (b) shows the condition of the coaxial cable 2 on the crimping part 112b of the inner conductor terminal 11b. The state which crimped the inner conductor 21 is shown, (c) shows the state by which the solder 5b was mounted on the outer periphery of the crimping part 112b of the inner conductor terminal 11b to which the inner conductor 21 was crimped.

  The inner conductor terminal 11 b has a main body portion 111 b for connecting to the inner conductor terminal of the counterpart connector, and a crimping portion 112 b for connecting to the inner conductor 21 of the coaxial cable 2. The shape of the main body portion 111b of the inner conductor terminal 11b is set according to the shape of the inner conductor terminal of the counterpart connector. If the cable connector 1b 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. For example, as shown in FIG. 5, the main body portion 111b of the inner conductor terminal 11b is formed in a quadrangular prism shape, and the tip end 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 112b of the inner conductor terminal 11b has a bottom part 114b and a crimping piece 113b. The crimping piece 113 b is for crimping the inner conductor 21 of the coaxial cable 2. The crimping piece 113b is a part formed in a tongue-like shape, and the pair of crimping pieces 113b are formed so as to face the left and right sides of the bottom portion substantially in parallel. For this reason, the crimping part 112b of the inner conductor terminal 11b is formed in a substantially U-shaped cross section as a whole. The inner conductor terminal 11b is made of a metal plate or the like, and is formed into a shape as shown in FIG. 5 by press working.

  The configuration of the cable connector 1b according to the second embodiment of the present invention having such a member and the configuration of the terminal portion of the cable 4b with cable connector according to the second embodiment of the present invention are as follows. Referring to FIG. 4, the insulator 22 is stripped off at the end of the coaxial cable 2, and the internal conductor 21 is exposed. The exposed inner conductor 21 is crimped to the crimping portion 112b of the inner conductor terminal 11b by the crimping piece 113b of the inner conductor terminal 11b. The solder 5b is placed on the outer periphery of the crimping portion 112b of the inner conductor terminal 11b to which the inner conductor 21 of the coaxial cable 2 is crimped. 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 122b of the outer conductor terminal 12b by the first crimping piece 123b of the outer conductor terminal 12b. Further, at the terminal portion of the coaxial cable 2, the covering material 24 is crimped to the crimping portion 122b of the outer conductor terminal 12b by the second crimping piece 124b of the outer conductor terminal 12b. The dielectric 13b is accommodated in the main body 111b of the outer conductor terminal 12b, and the inner conductor terminal 11b is accommodated in the opening formed in the dielectric 13b. For this reason, the inner conductor terminal 11b is held inside the main body 111b of the outer conductor terminal 12b in a state of being electrically insulated from the outer conductor terminal 12b by the dielectric 13b.

  The procedure for assembling the cable connector 1b 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 1a according to the first embodiment. The same method as the cable connector 1a according to the first embodiment can be applied to the method of crimping the inner conductor 21 of the coaxial cable 2 to the crimping portion 112b of the inner conductor terminal 11b (see FIG. 3). The same joining structure and method as the cable connector 1a according to the first embodiment of the present invention can be applied to the method of placing the solder 5b on the outer periphery of the crimping portion 112b of the inner conductor terminal 11b. 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 embodiment, the cable connector applied to the coaxial cable as the shielded cable has been described. However, the present invention can also be applied to cable connectors of other various shielded cables.

DESCRIPTION OF SYMBOLS 1a Cable connector concerning 1st embodiment of this invention 11a Inner conductor terminal of cable connector concerning 1st embodiment of this invention 111a Main-body part 112a of inner conductor terminal of cable connector concerning 1st embodiment of this invention This invention Crimped portion 113a of the inner conductor terminal of the cable connector according to the first embodiment of the present invention. 113a Crimp piece of the inner conductor terminal of the cable connector according to the first embodiment of the present invention 114a 12a Outer conductor terminal of the cable connector according to the first embodiment of the present invention 121a Main body portion 122a of the outer conductor terminal of the cable connector according to the first embodiment of the present invention Cable according to the first embodiment of the present invention Crimp part 123a of outer conductor terminal of connector Cable connector according to the first embodiment of the present invention The first crimping piece 124a of the outer conductor terminal of the cable The second crimping piece 1b of the outer conductor terminal of the cable connector according to the first embodiment of the present invention The cable connector 11b according to the second embodiment of the present invention Inner conductor terminal 111b of the cable connector according to the second embodiment Main body 112b of the inner conductor terminal of the cable connector according to the second embodiment of the present invention 113b The crimp portion 113b of the inner conductor terminal of the cable connector according to the second embodiment of the present invention. The crimping piece 114b of the inner conductor terminal of the cable connector according to the second embodiment of the present invention 114b The bottom surface portion 12b of the inner conductor terminal of the cable connector according to the second embodiment of the cable connector of the cable connector according to the second embodiment of the present invention. Outer conductor terminal 121b Main body portion 122b of the outer conductor terminal of the cable connector according to the second embodiment of the present invention Crimp part 123b of the outer conductor terminal of the cable connector according to the second embodiment 123b First crimping piece 124b of the outer conductor terminal of the cable connector according to the second embodiment of the present invention The cable connector according to the second embodiment of the present invention Second crimping piece 13a, 13b of outer conductor terminal Dielectric 2 Coaxial cable 21 Inner conductor of coaxial cable 22 Insulator of coaxial cable 23 Outer conductor of coaxial cable 24 Coaxial cable covering material 4a In the first embodiment of the present invention Cable 4b with cable connector Cable 5a, 5b with cable connector according to the second embodiment of the present invention Solder 91 Anvil 92 Crimper 921 Crimper depression 922 Crimper protrusion

Claims (2)

  A cable connector attached to a terminal portion of a shielded cable having an inner conductor and electromagnetically shielding the inner conductor, the inner conductor having a crimping portion provided with a crimping piece for crimping the inner conductor An outer conductor terminal that includes a terminal, a dielectric that accommodates the inner conductor terminal, and an outer conductor terminal that accommodates the dielectric in which the inner conductor terminal is accommodated and is connected to an outer conductor of the shielded cable. In the cable connector, solder is mounted to increase the electrical external dimension of the crimping portion.   A shielded cable having an inner conductor and an outer conductor that electrically shields the inner conductor, and the cable connector according to claim 1, wherein the inner conductor of the cable is crimped to the crimping portion by the crimping piece. And a cable with a cable connector, characterized in that solder for enlarging the electrical outer diameter of the crimping portion is provided on the outer periphery of the crimping portion of the inner conductor terminal to which the inner conductor is crimped. .

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