JP2011228207A - Coaxial connector, cable with connector and mounting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial connector, a cable with a connector and a mounting method, capable of obtaining good high-frequency characteristics with improvement of deteriorated characteristic impedance.SOLUTION: On a dielectric 9 and an outer conductor terminal 10, laser irradiation holes 15, 16 are respectively provided to connect the outside of the outer conductor terminal 10 to insertion holes 9a, 9b of the dielectric 9, so as to irradiate the inside of the insertion holes 9a, 9b of the dielectric 9 with a laser from the outside of the outer conductor terminal 10. Connection points between inner conductor terminals 8a, 8b and a core wire 4 of a coaxial cable 2 are disposed in the irradiation positions of the laser, passing through the laser irradiation holes 15, 16, at the insertion holes 9a, 9b, and are deposited by the laser.

Description

  The present invention relates to a coaxial connector, a cable with a connector, and a mounting method, and in particular, a coaxial connector to be attached to a terminal of a coaxial cable, a cable with a connector to which a coaxial connector is attached, and a coaxial connector to a terminal of a coaxial cable. It is related with the attachment method to attach.

  Conventionally, in the field of automobiles or the like, the coaxial connectors 100a and 100b connected to the terminal portion of the coaxial cable are known as shown in FIG. The coaxial connectors 100a and 100b are male and female connectors that are connected to each other. As shown in the figure, a coaxial cable 101 connected to the coaxial connectors 100a and 100b includes a core wire 103, an internal insulator 104 covering the core wire 103, and a braid 105 covering the outer periphery of the internal insulator 104. And an insulating sheath 106 covering the braid 105. The braid 105 is folded back onto the insulating sheath 106 and processed so that it can be connected to an outer conductor terminal 108 described later.

  Each of the coaxial connectors 100a and 100b includes an inner conductor terminal 107 connected to the core wire 103 of the coaxial cable 101, an outer conductor terminal 108 connected to the braid 105 of the coaxial cable 101, and a dielectric 109. Yes. The inner conductor terminal 107 includes a pair of inner conductor caulking pieces 110 that crimp the core wire 103 of the coaxial cable 101 and crimp the core wire 103, and a counterpart connection terminal 111 to which the counterpart inner conductor terminal is connected. Is formed.

  The outer conductor terminal 108 is formed by cutting and bending a single sheet metal. The outer conductor terminal 108 includes a bottom wall 112, an outer conductor caulking piece 114 that crimps the braid 105 erected from the bottom wall 112 and crimps the braid 105, and a dielectric erected from the bottom wall 112. A dielectric caulking piece 115 attached to the dielectric body 109 by caulking the body 109 is integrally formed. Further, the outer conductor terminal 108 of the coaxial connector 100a is further integrated with a cylindrical portion 113 which is erected from the bottom wall portion 112 and connected to the outer conductor terminal 108 of the coaxial connector 100b which is formed into a cylindrical shape by bending. Is formed.

  Next, a method for attaching the coaxial connectors 100a and 100b to the coaxial cable 101 described above will be described. First, the dielectric 109 is formed on the outer periphery of the mating connection terminal 111 by in-mold molding or the like. Next, the inner conductor caulking piece 110 of the inner conductor terminal 107 is crimped and crimped to the core wire 103 of the coaxial cable 101. Thereafter, the inner conductor terminal 107 attached to the coaxial cable 101 is disposed on the bottom wall portion 112 of the outer conductor terminal 108, the dielectric caulking piece 115 is crimped, and the outer conductor terminal 108 is attached to the inner conductor terminal 107. Further, the outer conductor caulking piece 114 is crimped to crimp the braid 105. The connector 100 described above can manufacture low-cost coaxial connectors 100a and 100b using sheet metal.

  In general, the characteristic impedance of the coaxial cable 101 is determined by the dielectric constant around the core wire 103 and the distance between the core wire 103 and the braid 105. However, in the conventional coaxial connectors 100a and 100b described above, since the core wire 103 is caulked with the inner conductor caulking piece 110, the outer periphery of the inner conductor caulking piece 110 cannot be covered with the dielectric 109. As a result, the characteristic impedance of the coaxial cable 101 is increased, resulting in a problem that the high frequency characteristics are deteriorated.

  Further, the above-described conventional coaxial connectors 100a and 100b are opened on the inner conductor caulking piece 110 of the outer conductor terminal 108 as shown in FIG. 4 in order to caulk the outer conductor caulking piece 114 and the dielectric caulking piece 115. It is necessary to provide the part 108A. Since the substantial distance between the core wire 103 and the braid 105 fluctuates due to the opening 108A, this also causes deterioration of the high frequency characteristics.

  Therefore, conventionally, the diameter of the tool used for crimping has been reduced with the aim of reducing the size of the opening 108A. However, since it is difficult to reduce the size significantly due to the durability of a crimping tool or the like, the opening 108A remains as it is, and as a result, the high frequency characteristics are deteriorated due to an increase in characteristic impedance. This makes it difficult to use the coaxial connectors 100a and 100b for high-speed transmission.

JP 2009-224033

  Then, this invention makes it a subject to provide the coaxial connector which can improve deterioration of characteristic impedance, and can acquire a favorable high frequency characteristic, the cable with a connector, and the attachment method.

  The invention described in claim 1 for solving the above-described problem includes a connector inner conductor, a columnar connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylinder covering the connector dielectric. In the coaxial connector, the connector dielectric and the connector outer conductor communicate with the outside of the connector outer conductor and the insertion hole of the connector dielectric, A laser irradiation hole for irradiating a laser into the insertion hole of the connector dielectric from the outside of the conductor is provided, and the end of the conductor in the connector passes through the laser irradiation hole. It exists in the coaxial connector characterized by being arrange | positioned in the irradiation position.

  A second aspect of the invention resides in the coaxial connector according to the first aspect, wherein the connector outer conductor is formed by bending a sheet metal into a cylindrical shape.

  The invention according to claim 3 includes a connector inner conductor, a columnar connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylindrical connector outer conductor covering the connector dielectric. In a cable with a connector comprising a coaxial connector and a coaxial cable having the terminal connected to the coaxial connector, the connector dielectric and the connector outer conductor include an outside of the connector outer conductor and the connector dielectric. A laser irradiation hole is provided in communication with the insertion hole to irradiate a laser into the insertion hole of the connector dielectric from the outside of the connector outer conductor, and the connector inner conductor and the coaxial cable inner conductor. Is connected at the irradiation position in the insertion hole of the laser passing through the laser irradiation hole and welded by the laser. It resides in the connector cable characterized by Rukoto.

  According to a fourth aspect of the present invention, the end of the coaxial cable has a connector inner conductor, a columnar connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylindrical cover that covers the connector dielectric. And an outer conductor, wherein the end portion of the inner conductor of the coaxial cable is inserted into the insertion hole of the connector dielectric, and the inner conductor of the coaxial cable and the inside of the connector A process of contacting and connecting a conductor, and irradiating a laser from a laser irradiation hole communicating the connector dielectric and the outside of the connector outer conductor provided in the connector outer conductor and the insertion hole of the connector dielectric Then, there is a mounting method characterized by sequentially performing a step of laser welding a connection portion between the inner conductor of the coaxial cable and the inner conductor of the connector.

  As described above, according to the first aspect of the present invention, the connector dielectric and the connector outer conductor are communicated with the outside of the connector outer conductor and the insertion hole of the connector dielectric so that the connector can be connected from the outside of the connector outer conductor. Laser irradiation holes for irradiating a laser are respectively provided in the dielectric insertion holes, and the end portions of the conductors in the connector are arranged at the laser irradiation positions in the laser insertion holes passing through the laser irradiation holes. According to the above configuration, when the end portion of the inner conductor of the coaxial cable is inserted into the insertion hole of the connector dielectric, and the inner conductor of the coaxial cable and the inner conductor of the connector are brought into contact with each other, the connection portion is placed in the insertion hole. It is arranged at the laser irradiation position. Then, when the laser beam is irradiated to the connection portion through the laser irradiation hole, the connection portion between the inner conductor of the coaxial cable and the connector inner conductor can be laser-welded. Thus, the connector dielectric and the connector outer conductor are simply provided with a fine laser irradiation hole necessary for irradiating the laser, and the inner conductor of the coaxial cable and the connector inner conductor are covered with the connector dielectric and the connector outer conductor. Therefore, it is possible to improve the deterioration of characteristic impedance and obtain good high frequency characteristics.

  According to the invention described in claim 2, since the connector outer conductor is formed into a cylindrical shape by bending a single sheet metal, the characteristic impedance is deteriorated while maintaining a low cost by using the sheet metal. It can be improved and good high frequency characteristics can be obtained.

  According to the third aspect of the present invention, the connector dielectric and the connector outer conductor communicate with the outside of the connector outer conductor and the insertion hole of the connector dielectric, and the connector dielectric insertion hole from the outside of the connector outer conductor. A laser irradiation hole for irradiating a laser is provided in each, and the connection point between the connector inner conductor and the inner conductor of the coaxial cable is arranged at the laser irradiation position in the laser insertion hole passing through the laser irradiation hole, It is welded by laser. Thus, the connector dielectric and the connector outer conductor are simply provided with a fine laser irradiation hole necessary for irradiating the laser, and the inner conductor of the coaxial cable and the connector inner conductor are covered with the connector dielectric and the connector outer conductor. Therefore, it is possible to improve the deterioration of characteristic impedance and obtain good high frequency characteristics.

  According to the fourth aspect of the present invention, the step of inserting the end portion of the inner conductor of the coaxial cable into the insertion hole of the connector dielectric and contacting the inner conductor of the coaxial cable and the inner conductor of the connector, and the connector A laser is irradiated from a laser irradiation hole that communicates the outside of the connector outer conductor provided in the dielectric and the connector outer conductor with the insertion hole of the connector dielectric, and the connection portion between the inner conductor of the coaxial cable and the connector inner conductor is laser-exposed. And sequentially performing the welding process. Thus, the connector dielectric and the connector outer conductor are simply provided with a fine laser irradiation hole necessary for irradiating the laser, and the inner conductor of the coaxial cable and the connector inner conductor are covered with the connector dielectric and the connector outer conductor. Therefore, it is possible to improve the deterioration of characteristic impedance and obtain good high frequency characteristics.

(A) And (B) is a side view which respectively shows one Embodiment of the cable with a female connector and the cable with a male connector as a cable with a connector of this invention. (A) And (B) is a top view of the cable with a female connector and the cable with a male connector which are shown in FIG. 1, respectively. (A) is the II sectional view taken on the line with a female connector shown in FIG. 1, (B) is the II-II sectional view taken on the cable with a male connector shown in FIG. (A) And (B) is a perspective view which shows an example of the conventional coaxial connector, respectively.

  Hereinafter, the coaxial connector, the cable with connector, and the mounting method of the present invention will be described with reference to FIGS. As shown in the figure, each of the cable with a female connector 1a and the cable with a male connector 1b as a cable with a connector includes a coaxial cable 2 and coaxial connectors 3a and 3b attached to the ends of the coaxial cable 2. Yes. As shown in FIG. 3, the coaxial cable 2 includes a core wire 4, an internal insulator 5 that covers the core wire 4, a braid 6 that covers the outer periphery of the internal insulator 5, and a sheath 7 that covers the braid 6. And is composed of. The braid 6 is folded on the insulating sheath 7 and processed so as to be connectable to coaxial connectors 3a and 3b described later.

  The coaxial connector 3a is a female connector, and the coaxial connector 3b is a male connector. The coaxial connectors 3a and 3b are connected to each other by a connector. As shown in FIG. 3, the coaxial connectors 3a and 3b include inner conductor terminals 8a and 8b as connector inner conductors connected to the core wire 4 of the coaxial cable 2, and insertion holes 9a into which the inner conductor terminals 8a and 8b are inserted. , 9b, and a dielectric 9 as a cylindrical connector dielectric, and an outer conductor terminal 10 as a connector outer conductor connected to the braid 6 of the coaxial cable 2.

  The inner conductor terminal 8a is provided with a cylindrical female terminal portion into which the inner conductor terminal 8b enters at the end portion on the coaxial connector 3b side, and at the end portion of the core wire 4 of the coaxial cable 2 at the end portion on the coaxial cable 2 side. A bar-shaped contact connecting portion that contacts is provided. The inner conductor terminal 8b is provided with a male terminal portion that penetrates into the female terminal portion of the inner conductor terminal 8a at the end portion on the coaxial connector 3a side, and the end of the core wire 4 of the coaxial cable 2 at the end portion on the coaxial cable 2 side. A rod-like contact connecting portion that contacts the portion is provided. When the male terminal portion of the inner conductor terminal 8b is inserted into the female terminal portion of the inner conductor terminal 8a, the inner conductor terminal 8a and the inner conductor terminal 8b are electrically connected to each other.

  The dielectric 9 of the coaxial connector 3a has the entire inner conductor terminal 8a inserted in the insertion hole 9a. Further, the core wire 4 is inserted into the insertion hole 9a from the opening on the coaxial cable 2 side, and the end portion of the core wire 4 inserted into the insertion hole 9a is in contact with the contact connection portion of the inner conductor terminal 8a. . In the dielectric 9 of the coaxial connector 3b, the contact connecting portion of the inner conductor terminal 8b is inserted into the insertion hole 9b. The male terminal portion of the inner conductor terminal 8b protrudes from the dielectric 9 toward the coaxial connector 3a. Further, the core wire 4 is inserted into the insertion hole 9b from the opening on the coaxial cable 2 side, and the end portion of the core wire 4 inserted into the insertion hole 9b is in contact with the contact connection portion of the inner conductor terminal 8b. .

  The outer conductor terminal 10 is formed by cutting and bending a single sheet metal. The outer conductor terminal 10 includes a bottom wall portion 11, a pair of cable caulking pieces 12 for caulking the sheath 7 of the coaxial cable 2 erected from the edge in the width direction of the bottom wall portion 11, and the bottom wall portion 11 A pair of outer conductor caulking pieces 13 for crimping the braid 6 by crimping the braid 6 standing from the edge in the width direction and a dielectric 9 standing from the edge in the width direction of the bottom wall 11 are added. A pair of dielectric caulking pieces 14 to which the dielectric 9 is fastened are integrally formed.

  As shown in FIGS. 1 and 3, the dielectric 9 and the outer conductor terminal 10 communicate with the insertion holes 9 a and 9 b of the dielectric 9 from the outside of the outer conductor terminal 10. Laser irradiation holes 15 and 16 for irradiating a laser are provided in the insertion holes 9a and 9b of the dielectric 9, respectively. The laser irradiation holes 15 and 16 are minute holes that can be irradiated with laser in the insertion holes 9a and 9b. And the contact connection location of inner conductor terminal 8a, 8b and the core wire 4 of the coaxial cable 2 is arrange | positioned in the irradiation position in the insertion holes 9a and 9b of the laser which passes the said laser irradiation holes 15 and 16, and it welds with a laser Has been.

  Next, a procedure for attaching the coaxial connectors 3a and 3b to the terminal of the coaxial cable 2 having the above-described configuration will be described. First, the dielectric 9 is formed in advance around the inner conductor terminals 8a and 8b by insert molding or the like. In this state, the contact connection portions of the inner conductor terminals 8a and 8b are arranged at the irradiation positions in the laser insertion holes 9a and 9b passing through the laser irradiation hole 15. Next, the insulation sheath 7 at the end of the coaxial cable 2 is removed to expose the braid 6. Then, the exposed braid 6 is folded back onto the insulating sheath 7. Further, the inner insulator 5 at the end of the coaxial cable 2 is removed to expose the core wire 4.

  Next, the exposed end portion of the core wire 4 of the coaxial cable 2 is inserted into the insertion holes 9a and 9b of the dielectric 9, and the end portion of the core wire 4 and the contact connection portion of the inner conductor terminals 8a and 8b are brought into contact with each other. Connect. As described above, the contact connection portions of the inner conductor terminals 8a and 8b are disposed at the irradiation positions in the laser insertion holes 9a and 9b that pass through the laser irradiation hole 15, so that the core wire 4 and the inner conductor terminal 8a are naturally formed. , 8b are also arranged at the laser irradiation positions in the insertion holes 9a, 9b.

  Next, the dielectric 9 into which the core wire 4 and the inner conductor terminals 8a and 8b of the coaxial cable 2 described above are inserted is disposed on the bottom wall portion 11 between the pair of dielectric caulking pieces 14, and the insulating sheath 7 of the braid 6 is disposed. The portion folded upward is disposed on the bottom wall portion 11 between the pair of outer conductor caulking pieces 13, and the coaxial cable 2 is disposed on the bottom wall portion 11 between the pair of cable caulking pieces 12. Thereafter, the pair of dielectric caulking pieces 14 are caulked to form a cylindrical shape covering the dielectric 9, and the outer conductor terminal 10 is attached to the dielectric 9. At this time, the laser irradiation hole 16 provided in the outer conductor terminal 10 and the laser irradiation hole 15 provided in the dielectric 9 overlap and communicate with each other. Further, the outer conductor caulking piece 13 is crimped and the braid 6 is crimped. Further, the cable caulking piece 12 is caulked, and the outer conductor terminal 10 is attached to the coaxial cable 2.

  Thereafter, a laser is incident on the laser irradiation holes 15 and 16 from the outside of the outer conductor terminal 10. As a result, the laser beam that has passed through the laser irradiation holes 15 and 16 is irradiated to the connecting portion between the core wire 4 and the inner conductor terminals 8a and 8b, and the core wire 4 and the inner conductor terminals 8a and 8b are laser welded together.

  According to the above-described embodiment, the dielectric body 9 and the outer conductor terminal 10 communicate with the outside of the outer conductor terminal 10 and the insertion holes 9 a and 9 b of the dielectric body 9, and the dielectric body from the outside of the outer conductor terminal 10. 9 are provided with laser irradiation holes 15 and 16 for irradiating a laser, respectively, and the connection points between the inner conductor terminals 8a and 8b and the core wire 4 of the coaxial cable 2 are connected to the laser irradiation holes 15 and 15, respectively. 16 is disposed at the laser irradiation position in the insertion holes 9a and 9b of the laser passing through 16, and is welded by the laser. As a result, the dielectric 9 and the outer conductor terminal 10 are simply provided with the fine laser irradiation holes 15 and 16 necessary for irradiating the laser, and the core wire 4 and the inner conductor terminals 8a and 8b of the coaxial cable 2 are dielectrically formed. Since it can be covered with the body 9 and the outer conductor terminal 10, it is possible to improve the deterioration of the characteristic impedance and obtain good high frequency characteristics.

  In addition, according to the above-described embodiment, the outer conductor terminal 10 is formed into a cylindrical shape by bending a single sheet metal, so that deterioration of characteristic impedance is maintained while maintaining low cost using the sheet metal. This improves the high frequency characteristics.

  According to the embodiment described above, the outer conductor terminal 10 is formed into a cylindrical shape by bending a single sheet metal, but the present invention is not limited to this. Other methods may be used as a method of manufacturing the outer conductor terminal 10.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1a Cable with female connector 1b Cable with male connector 2 Coaxial cable 3a Coaxial connector 3b Coaxial connector 4 Core wire (inner conductor of coaxial cable)
8a Inner conductor terminal (connector inner conductor)
8b Inner conductor terminal (connector inner conductor)
9a Insertion hole 9b Insertion hole 9 Dielectric (connector dielectric)
10 Outer conductor terminal 15 Laser irradiation hole 16 Laser irradiation hole

Claims (4)

In a coaxial connector comprising a connector inner conductor, a cylindrical connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylindrical connector outer conductor covering the connector dielectric,
The connector dielectric and the connector outer conductor communicate with the outside of the connector outer conductor and the insertion hole of the connector dielectric, and from the outside of the connector outer conductor into the insertion hole of the connector dielectric. Laser irradiation holes for irradiating lasers are respectively provided,
The coaxial connector is characterized in that an end of the conductor in the connector is disposed at an irradiation position in the insertion hole of the laser that passes through the laser irradiation hole. The coaxial connector according to claim 1, wherein the connector outer conductor is formed in a cylindrical shape by bending a single sheet metal. A coaxial connector having a connector inner conductor, a cylindrical connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylindrical connector outer conductor covering the connector dielectric; A coaxial cable with a connector connected thereto, and a cable with a connector,
The connector dielectric and the connector outer conductor communicate with the outside of the connector outer conductor and the insertion hole of the connector dielectric, and from the outside of the connector outer conductor into the insertion hole of the connector dielectric. Laser irradiation holes for irradiating lasers are respectively provided,
The connector is characterized in that a connection point between the connector inner conductor and the inner conductor of the coaxial cable is disposed at an irradiation position in the insertion hole of the laser that passes through the laser irradiation hole, and is welded by the laser. With cable. Coaxial cable having a connector inner conductor, a cylindrical connector dielectric provided with an insertion hole into which the connector inner conductor is inserted, and a cylindrical outer conductor covering the connector dielectric at the end of the coaxial cable A mounting method for attaching a connector,
Inserting the end portion of the inner conductor of the coaxial cable into the insertion hole of the connector dielectric, and abutting and connecting the inner conductor of the coaxial cable and the inner conductor of the connector;
The inner conductor of the coaxial cable and the connector are irradiated with laser from a laser irradiation hole that communicates the outside of the connector outer conductor provided on the connector dielectric and the connector outer conductor with the insertion hole of the connector dielectric. A step of laser welding the connection portion with the inner conductor;
The attachment method characterized by performing sequentially.

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