JP4274381B2 - Terminal connection method for micro coaxial cable - Google Patents

Description

  The present invention relates to a terminal connection method for a micro coaxial cable in which a large number of micro coaxial cables are aligned with a connector at a narrow pitch, and a center conductor exposed at the end of each micro coaxial cable is electrically connected to a center contact of the connector.

  As electronic devices become smaller and more functional, coaxial cables are becoming thinner, and for example, ultra-fine coaxial cables with an outer diameter of the central conductor of about 0.3 mm are used. Due to demands for high-density mounting, miniaturization of electronic components, etc., connectors for connecting a large number of coaxial cables are also miniaturized, so that ultra-fine coaxial cables are connected to connectors at a narrow pitch.

  The ultra-fine coaxial cable has a central conductor, an intermediate dielectric, an outer conductor consisting of a shield wire from the center axis side, and an insulation jacket that covers the outer circumference, and is coaxially formed. Strip the jacket, outer conductor, and intermediate dielectric from the outer periphery of the end of the micro coaxial cable in order, expose the center conductor, intermediate dielectric, and outer conductor in that order from the front end, and connect the outer conductor to the ground bar attached to the connector. In addition to the connection, the center conductor is electrically connected to the center contact exposed at the corresponding portion of the connector.

  However, in order to connect the fine coaxial cable to the center contact arranged on the connector at a narrow pitch, it is necessary to align a number of fine coaxial cables according to the pitch of the center contact, and further, it is exposed at the front end thereof. It was necessary to take measures to prevent the central conductor from separating from the central contact. Therefore, conventionally, when connecting a large number of micro coaxial cables to a connector, the external conductors of a large number of micro coaxial cables are soldered to a single conductive ground bar and kept aligned, The center conductor at the front end is fixed to the anti-scattering portion, and the center conductor maintains the axial orientation of the micro coaxial cable, and is connected to the center contact (see, for example, Patent Document 1).

JP 2006-120364 A (specification items 0031 to 0036, FIGS. 1 to 3)

  Hereinafter, the terminal connection method of the conventional micro coaxial cable will be described with reference to FIGS. 7 and 8. The micro coaxial cable 100 with the center conductor 101 and the outer conductor 102 exposed is connected to the connector 110 before being connected to the connector 110. A number of micro coaxial cables 100 are aligned in accordance with the arrangement pitch of the center contacts 111 attached to 110.

  Then, as shown in FIG. 7, the outer conductors 102 of the aligned micro coaxial cables 100 are soldered to the ground bar 103 made of a single metal plate, and a number of micro coaxial cables 100 are aligned at intervals. Position. Further, the center conductor 101 exposed to the front of the outer conductor 102 is arranged to be disposed on the axis of each micro coaxial cable 100 so that the front end portion thereof is formed from a resin, an insulating film, or the like. It is firmly attached to and held so that it does not come apart.

  In this way, as shown in FIG. 8, a large number of micro coaxial cables 100 connected by the ground bar 103 and the anti-scattering portion 104 have the center conductor 101 of each micro coaxial cable 100 on the exposed portion of the center contact 111. It is set on the connector 110 made of an insulating material so as to be disposed.

  Subsequently, for each central conductor 101, the central conductor 101 and the central contact 111 that is in contact with the central conductor 101 are joined by fine welding, and both are electrically connected. After all the center conductors 101 are joined by welding, the center conductor 101 is cut along the AA line indicated by the broken line in FIG. 8, the detachment preventing portion 104 is separated from the end of each microcoaxial cable 100, and the microcoaxial cable 100. The terminal connection work to the connector 110 is completed.

  In the terminal connection method of the conventional micro coaxial cable 100 described above, a large number of micro coaxial cables 100 are aligned according to the pitch of the narrow center contacts 111 and solder-connected to the ground bar 103 while maintaining the aligned state. This is extremely difficult, requires a jig for maintaining the pitch in the arrangement direction, and requires another preliminary process before connecting the terminal to the connector 110.

  Further, it is necessary to use the anti-scattering portion 104 so that the central conductor 101 is separated and is not separated from the central contact 111 to be connected or between adjacent central conductors 101, and after the terminal is connected, A step of cutting the conductor 101 to cut off the scattering prevention unit 104 is necessary.

  Further, in the cutting operation of the center conductor 101, it is difficult to cut the flexible center conductor 101 so as not to protrude from the connector 110 with the same length, and the center conductors 101 that are cut unevenly are in contact with each other. Or contact with a shield case (not shown) covering the periphery of the connector 110 may cause a short circuit.

  The problem due to the dispersion of the center conductor 101 described above is that a normal coaxial cable having a relatively large outer diameter of the center conductor 101 has a pressure contact slit or pressure contact groove of the center contact 111 connected to the center conductor 101 by pressure contact or pressure contact. This can be solved by inserting and positioning the center conductor 101. However, the connecting portion connected to the center conductor 101 of the center contact 111 arranged at a narrow pitch has a sufficient size to form a pressure contact slit or a crimp groove. In the case of connecting a large number of terminals of the micro coaxial cable 100 to a miniaturized connector, the problem cannot be solved.

  Further, in the micro coaxial cable 100 in which the center conductor 101 itself has a small diameter, when the center conductor 101 is connected to the center contact 111 by crimping or pressure contact, the center conductor 101 comes out of the center contact 111 or a gap is generated, and the center contact is made with a predetermined contact pressure. Therefore, the connection method is not suitable for terminal connection of the micro coaxial cable 100. Therefore, it is necessary to connect each center conductor 101 to the center contact 111 by soldering or welding. However, the connection work performed by bringing the flexible center conductor 101 in which a plurality of conductive wires are bundled close to the center contact 111 is performed. Combined with wiring with a narrow pitch, it was extremely difficult and the workability was poor.

  The present invention has been made in consideration of such conventional problems, and it is not necessary to position a large number of micro coaxial cables arranged in accordance with the pitch of the center contact of the connector before the terminal connection work. An object of the present invention is to provide a terminal connection method for a fine coaxial cable that can be connected to each terminal of the fine coaxial cable.

  It is another object of the present invention to provide a terminal connection method for a fine coaxial cable in which the central conductors are aligned without using the anti-scattering portion, and the central conductor of the fine coaxial cable does not come into contact with a shield case to cause a short circuit.

In order to achieve the above-mentioned object, the terminal connection method of the micro coaxial cable according to claim 1 is a large number of micro coaxial cables formed by alternately covering the intermediate dielectric, the outer conductor, and the jacket coaxially from the center conductor toward the outer periphery. A cable is arranged on a plane of an insulating housing of a connector at a predetermined interval, and a center conductor exposed at a front end portion of each of the micro coaxial cables is electrically connected to a center contact fixed to the insulating housing. A terminal connection method,
An insulating cylinder having an outer peripheral surface of the intermediate dielectric or the jacket is left at the front end of each of the micro coaxial cables, and the center conductor, the intermediate dielectric, and the outer conductor are alternately arranged backward from the insulating cylinder. A first step of exposing, a first guide groove recessed in the arrangement direction of the plurality of micro coaxial cables on the plane of the insulating housing at a predetermined interval, and corresponding to the front of each of the first guide grooves The outer conductor or the jacket, which is exposed behind the center conductor of the micro coaxial cable, and the insulating tube portion are arranged in the second guide groove provided in a recess on the plane of the insulating housing, respectively. The coaxial cables are aligned at predetermined intervals in the arrangement direction, and the outer conductor or the outer conductor exposed behind the central conductor of each of the micro coaxial cables is formed by the first guide groove and the second guide groove. Is a second step of guiding the jacket and the insulating cylindrical portion along the axial front-rear direction of each of the micro coaxial cables, and each of the above-mentioned center contacts protruding rearward of the second guide groove. A third step of aligning the multiple micro-coaxial cables in the front-rear direction so that a central conductor of the micro-coaxial cable is disposed; a pressing plate is bridged over the multiple micro-coaxial cables; A fourth step of clamping the outer conductor or jacket of the micro coaxial cable between the first guide groove and the pressing plate and fixing the micro coaxial cable to the insulating housing by fixing to the insulating housing. And electrically connecting the center conductor of each of the micro coaxial cables to the center contact protruding to the corresponding portion by welding or soldering. Characterized by comprising a fifth step of connection.

  In the second step, by arranging the outer conductor or jacket of the micro coaxial cable in the first guide groove and the insulating tube part at the front end thereof in the second guide groove, many micro coaxial cables can be adjusted to the pitch of the center contact. Align in the array direction at regular intervals. The first guide groove and the second guide groove guide the micro coaxial cable in the front-rear direction, and the front end of the micro coaxial cable is an insulating cylinder portion that is less bent than the center conductor. The micro coaxial cables can be aligned together in the front-rear direction by abutting against the same plane such as a jig.

  The central conductor formed by bundling a large number of conductive wires is exposed in a bundled state without being individually separated because the insulating cylinder portion is left at the front end.

  In the second and third steps, a large number of micro coaxial cables aligned in the arrangement direction and the front-rear direction have an outer conductor or jacket sandwiched between the holding plate and the first guide groove in the fourth step. On the other hand, since the center conductor is arranged in the vicinity of the center contact in the third step, the large number of micro coaxial cables that are positioned and fixed can be electrically connected to each other by welding or soldering.

In the terminal connection method of the micro coaxial cable according to claim 2 , in the fourth step, the outer conductor of the micro coaxial cable sandwiched between the first guide groove and the pressing plate is in the first guide groove. It is electrically connected to a ground contact fixed to the insulating housing so as to protrude.

  Since the outer conductor is sandwiched between the holding plate and the guide groove, the outer conductor is electrically connected to the ground contact protruding into the guide groove.

4. The terminal connection method for a micro coaxial cable according to claim 3 , wherein the holding plate is a ground bar made of a conductive metal plate that sandwiches the outer conductor of the micro coaxial cable with the first guide groove in the fourth step. And further comprising a sixth step of electrically connecting the outer conductor of the micro coaxial cable, which is positioned and fixed to the insulating housing, and the ground bar by soldering before or after the fifth step. And

  The ground bar sandwiches and solders the outer conductor of each micro-coaxial cable between the first guide groove, so that a large number of micro-coaxial cables are simultaneously fixed to the insulating housing, and each outer conductor is electrically connected to the ground bar. Connecting.

5. The terminal connection method for a micro coaxial cable according to claim 4, wherein the center contact protruding rearward of the second guide groove is formed with a bifurcated tip, and the center of each micro coaxial cable is formed in the fifth step. The conductor is electrically connected between the two forks of the center contact.

The method for connecting terminals of a micro coaxial cable according to claim 5 is characterized in that a plurality of micro coaxial cables formed by alternately covering intermediate dielectrics, outer conductors, and jackets coaxially from the center conductor toward the outer periphery are insulated at predetermined intervals. A terminal connection method of a micro coaxial cable, wherein the center conductor arranged on the plane of the housing and exposed to the front terminal portion of each micro coaxial cable is electrically connected to a center contact fixed to the insulating housing,
An insulating cylinder having an outer peripheral surface of the intermediate dielectric or the jacket is left at the front end of each of the micro coaxial cables, and the center conductor, the intermediate dielectric, and the outer conductor are alternately arranged backward from the insulating cylinder. The first guide to be exposed and the second guide grooves are recessed at the same pitch as the predetermined intervals on the plane of the insulating housing in which the first guide grooves are recessed at predetermined intervals in the arrangement direction of the multiple micro coaxial cables. A second step of disposing the provided guide jig so that the second guide groove is disposed corresponding to the front of each first guide groove; and the first guide groove and the second guide groove in front of the first guide groove The outer conductor or the jacket exposed behind the center conductor of the micro coaxial cable and the insulating tube portion are arranged, and the plurality of micro coaxial cables are aligned in the arrangement direction at predetermined intervals, and the first Plan The outer conductor or jacket exposed behind the center conductor of each of the micro coaxial cables and the insulating cylinder portion are guided by the groove and the second guide groove along the longitudinal front-rear direction of the micro coaxial cables. And a third step of aligning the plurality of micro coaxial cables in the front-rear direction so that a center conductor of each micro coaxial cable is disposed in the vicinity of the center contact projecting rearward of the second guide groove. And an outer conductor of the micro coaxial cable between the first guide groove and the press plate by spanning a press plate over the plurality of micro coaxial cables and fixing the press plate to the insulating housing. Alternatively, a fifth step of sandwiching a jacket and positioning and fixing the micro coaxial cable to the insulating housing, and the micro coaxial cables A sixth step of electrically connecting the central conductor of the bull to the central contact projecting to the corresponding portion by welding or soldering; and before or after the sixth step, the guide jig is removed from the plane of the insulating housing. And 7 steps.

  By arranging the outer conductor or jacket of the micro coaxial cable in the first guide groove and the intermediate dielectric at the front end in the second guide groove, a large number of micro coaxial cables are arranged at equal intervals according to the pitch of the center contact Align in the direction. The first guide groove and the second guide groove guide the micro coaxial cable in the front-rear direction, and the front end of the micro coaxial cable is an insulating tube portion that is less likely to be bent than the center conductor. The micro coaxial cables can be aligned together in the front-rear direction by abutting against the same plane such as a jig.

  A large number of micro coaxial cables aligned in the arrangement direction and the front-rear direction have an outer conductor or jacket sandwiched between the presser plate and the first guide groove, and are positioned and fixed with respect to the insulating housing. In the coaxial cable, since the central conductor is disposed in the vicinity of the central contact, both can be electrically connected by welding or soldering.

  Since the second guide groove is formed in a jig that is removed from the insulating housing in the seventh step and is not recessed in the insulating housing, the insulating housing does not have a complicated shape and is miniaturized.

According to the first and fifth aspects of the present invention, since the front end of each of the micro coaxial cables is an insulating cylindrical portion that covers the outer periphery of the center conductor, the center conductors are scattered and the center conductors of the adjacent micro coaxial cables are adjacent to each other. There is no short circuit, and there is no need to use an anti-scattering portion or the like for fixing the central conductors of the micro coaxial cables together.

  In addition, since the insulating cylindrical portion at the front end of each micro coaxial cable is less likely to bend than the center conductor, it is easy to place in the second guide groove for alignment in the arrangement direction, and the front end of each micro coaxial cable is pushed in, It is also easy to align in the front-rear direction.

  In addition, since the center conductor of the micro coaxial cable is surrounded by an insulating insulating cylinder at the front end, the center conductor protrudes forward by cutting the center conductor without being short-circuited to the shield case disposed in front. There is no need to adjust the length of the micro coaxial cable.

  According to the second aspect of the present invention, since the external conductor is electrically connected to the ground contact in the fourth step of positioning and fixing each of the micro coaxial cables to the insulating housing, the connection step to the ground contact becomes unnecessary.

  According to the invention of claim 3, each of the micro coaxial cables is insulated more firmly because the outer conductor is sandwiched between the ground bar and the first guide groove and soldered to the ground bar in the sixth step. Fixed to the housing. In addition, since the ground bar is electrically connected at the connection positions with a large number of external conductors and is equipotential, a high shielding effect can be obtained.

According to the fifth aspect of the present invention, since the second guide groove for guiding the front end of each micro coaxial cable is not formed in the insulating housing, the connector can be reduced in size.

   Hereinafter, a terminal connecting method of a micro coaxial cable according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing an intermediate process of connecting the ends of a number of micro coaxial cables 1, 1... To a male connector 10, and FIG. 3 is an enlarged exploded perspective view of the main part of FIG. 1, FIG. 4 is a longitudinal sectional view of the male connector 10 to which the micro coaxial cable 1 is connected, and FIG. 5 is the male connector of FIG. 10 is a longitudinal sectional view showing a state where 10 is connected to the female connector 30. FIG. Hereinafter, the configuration of each part will be described with the vertical direction in FIGS. 4 and 5 being the vertical direction, the right side being the front, and the left side being the rear.

  The micro coaxial cable 1 has an outer diameter in which a plurality of conductive wires are bundled. An intermediate dielectric 3, an outer conductor 4 made of a shield wire, and an insulating jacket 5 covering the outer periphery are coaxially formed around a central conductor 2 wired along a central axis of about 3 mm. In the embodiment, as shown in FIG. 4, the jacket 5 and the outer conductor 4 are sequentially peeled from the outer periphery of the front end (right end in FIG. 4) of the micro coaxial cable 1, and the intermediate dielectric 3 exposed in front of the outer conductor 4. The middle conductor is exposed to expose the central conductor 2, and the intermediate dielectric 3 serving as an insulating cylinder is left at the front end.

  The male connector 10 for connecting the end of the micro coaxial cable 1 is an insulating housing formed in an elongated plate shape with the arrangement direction (direction orthogonal to the paper surface in FIG. 4) of a number of micro coaxial cables 1, 1. 11, center contacts 12, 12... Fixed to the insulating housing 11 corresponding to each micro coaxial cable 1 to be connected, and one sheet fixed to the insulating housing 11 along the arrangement direction behind the center contact 12. A grounding contact 13, a conductive ground bar 14 that spans on a plane (upper surface) of the insulating housing 11 and is fixed to both sides in the arrangement direction of the insulating housing 11, and further above the ground bar 14. A shield case 15 is provided to cover the upper and front sides of the insulating housing 14.

  The insulating housing 11 is formed into an elongated plate shape with an insulating synthetic resin, and a first guide groove 6 recessed in a wave shape from the rear end to the front is formed on the plane along the arrangement direction. Many recesses are provided at regular intervals. The inner diameter of the first guide groove 6 is slightly larger than the outer diameters of the outer conductor 4 and the insulation jacket 5 of the micro coaxial cable 1, so that the portion of the outer conductor 4 or the insulation jacket 5 of the micro coaxial cable 1 is formed in the first guide groove. 6 are guided in the front-rear direction without rattling, and a large number of the micro-coaxial cables 1 arranged in the first guide grooves 6 are disturbed between the pitches in the arrangement direction. There is no, and it arranges at equal intervals.

  In front of the plane of the insulating housing 11, guide ribs 7 are erected along the arrangement direction, and an extension line of each first guide groove 6 is left at the front end of the micro coaxial cable 1 at a portion intersecting the guide ribs 7. A second guide groove 8 for guiding the intermediate dielectric 3 in the front-rear direction is opened upward and is recessed. Since the 1st guide groove 6 and the 2nd guide groove 8 are formed on the same axis line of the front-back direction, the terminal of the micro coaxial cable 1 is guided to the front-back direction, without the front end varying.

  Fixing grooves 16 for fixing a pair of fixing pieces 13a on both sides of a ground contact 13 to be described later by press-fitting in a plane direction from the bottom are formed on both sides along the arrangement direction of the insulating housings 11, as shown in FIG. As described above, a press-fit groove 17 that is continuous with the fixed groove 16 and that faces the ground contact portion 13b at one end of the fixed piece 13a is recessed from the plane. The press-fitting groove 17 has a groove width equal to or slightly thinner than the press-fitting piece 14b so as to prevent a press-fitting piece 14b of the ground bar 14 to be described later and to fix the ground bar 14 to the insulating housing 11. .

  A fitting recess 19 for fitting and connecting the female connector 30 is provided on the bottom surface of the insulating housing 11. As shown in FIG. 4, a plurality of mounting grooves 9 communicating with each first guide groove 6 are formed along the rear inner wall surface of the fitting recess 19, and will be described later from the inner top surface of the fitting recess 19. A support protrusion 11a for positioning and fixing the center contact 12 is suspended.

  The center contact 12 is formed by punching a band-shaped conductive metal plate and press-worked. The center contact 12 is folded back into a U shape in the middle, and the folded forward portion is further bent forward at a right angle and folded back. The leading end of the portion is a central conductor connecting portion 12a that is bifurcated. The same number of center contacts 12 as the number of first guide grooves 6 are provided, and each center contact 12 is insert-molded when the insulating housing 11 is molded corresponding to each first guide groove 6 and folded back into a U-shape. The intermediate portion and the support protrusion 11a are integrally formed. As shown in FIG. 4, in the state of being integrally molded and fixed to the insulating housing 11, the center conductor connecting portion 12 a of the center contact 12 is insulated from the second guide groove 8 in front of the first guide groove 6. The housing 11 protrudes in the plane, and the lower folded portion is exposed on the surface of the support protrusion 11 a facing the rear inner wall surface of the fitting recess 19. Further, the front end portion bent at a right angle toward the front from the folded portion is exposed along the bottom surface of the second guide groove 8.

  The ground contact 13 is formed by stamping a single conductive metal plate into a strip shape longer than the length of the insulating housing 11 in the longitudinal direction, and is arranged along the rear inner wall surface of the fitting recess 19. Corresponding to the connecting piece 13d and the portion of the first guide groove 6, the height of the outer conductor connecting portion 13c is substantially the same as the height of the outer conductor connecting portion 13c protruding above the connecting piece 13d and bifurcated at the upper end. It is provided with a pair of fixed pieces 13a that are bent at both sides of the connecting piece portion 13d at a right angle.

  This ground contact 13 is one in which a pair of fixing pieces 13a on both sides from the bottom surface side of the insulating housing 11 is press-fitted into the fixing groove 16 and attached to the insulating housing 11. As shown in FIG. The conductor connecting portion 13 c protrudes from the mounting groove 9 into the first guide groove 6, and the lower connecting piece portion 13 d is exposed along the rear inner wall surface of the fitting recess 19. The ground contact portion 13 b at one end of the fixed piece 13 a intersects the press-fit groove 17 and projects into the press-fit groove 17.

  Therefore, the ground contact 13 and the center contact 12 are exposed along the rear inner wall surface of the fitting recess 19 and the surface of the support protrusion 11a facing the rear inner wall surface, and as shown in FIG. The contacts 31 and 32 of the female connector 30 to be fitted and connected to are contacted.

  The ground bar 14 is formed by punching a single conductive metal plate in a strip shape so as to be bridged in the arrangement direction on the plane of the insulating housing 11 in which the first guide grooves 6 are recessed. It consists of a strip-shaped main body 14a and a pair of press-fitting pieces 14b that are suspended from both sides in the longitudinal direction. The band-shaped main body 14a is fixed on the insulating housing 11 by press-fitting a pair of press-fitting pieces 14b into the press-fitting groove 17, and in the fixed state, the portion of the band-shaped main body 14a facing the first guide groove 6 above. Is bent into a waveform having a convex surface upward. A large number of apertures 14c are formed in the middle of the strip-shaped main body 14a along the longitudinal direction (arrangement direction).

  The shield case 15 is a conductive metal plate, and includes a top plate that covers the top of the insulating housing 11 and a front plate that is bent at a right angle to the front and covers the front of the insulating housing 11. Engaging portions (not shown) formed on both sides along the lower side of the front plate are engaged with the insulating housing 11 and attached. The shield case 15 attached to the insulating housing 11 is in elastic contact with the upper surface of the ground bar 14 and is electrically connected to the ground bar 14.

  Hereinafter, a process of connecting a number of terminals of the micro coaxial cable 1 to the male connector 10 configured as described above will be described. Each of the micro coaxial cables 1 is processed so that the intermediate conductor 3 is left at the front end, and the center conductor 2, the intermediate dielectric 3, and the outer conductor 4 are sequentially exposed behind the intermediate dielectric 3. 6, the outer conductor 4 and the insulating jacket 5 are all placed on the plane of the insulating housing 11 so that the outer conductor 4 and the insulating jacket 5 are connected to the second guide groove 8 in front of the outer conductor 4. Deploy.

  Since each first guide groove 6 and the second guide groove 8 in front of the first guide groove 6 are formed in the front-rear direction at equal intervals in the arrangement direction, all the arranged micro coaxial cables 1 are aligned at the same pitch in the arrangement direction. Is done. Since the first guide groove 6 and the second guide groove 8 guide the outer conductor 4 and insulating jacket 5 of the micro coaxial cable 1 and the intermediate dielectric 3 at the front end in the front-rear direction, the first guide groove 6 and the second guide groove 8 protrude from the second guide groove 8 to the front end. The intermediate dielectric 3 is pushed backward, and the center conductor 2 faces in a position close to the center conductor connecting portion 12a of the center contact 12 protruding in the middle between the first guide groove 6 and the second guide groove 8. Adjust the position of the direction.

  Here, each center conductor connecting portion 12a is projected at a position equidistant from the front surface of the insulating housing 11, while all the micro coaxial cables 1 are also centered from the intermediate dielectric 3 at a position equal to the distance from the front end. The conductor 2 is stripped off. Thereby, using a jig (not shown) that abuts on the front surface of the insulating housing 11, the micro coaxial cables 1 protruding from the front surface are pushed together and the positions of all the micro coaxial cables 1 in the front-rear direction are set. It can be adjusted in one step.

  Subsequently, an elongated solder plate 20 is bridged along the arrangement direction on the outer conductors 4 of all the micro coaxial cables 1 arranged in the first guide groove 6 and the second guide groove 8, and is shown in FIG. Similarly, the ground bar 14 is bridged so that the belt-like main body 14a covers the solder plate 20 from above.

  Thereafter, a heater (not shown) having a pressurizing mechanism is placed on the belt-like main body 14a of the ground bar 14, and the whole belt-like main body 14a is heated by the heater while being pressed downward. The solder plate 20 is heated and pressurized via a ground bar 14 heated by a heater, and the melted solder flows into each external conductor 4 of the micro coaxial cable 1, and soldering between the external conductor 4 and the ground bar 14 is performed collectively. Done. At the same time, since the entire ground bar 14 is pushed downward, the press-fitting pieces 14b on both sides in the arrangement direction are press-fitted into the press-fitting grooves 17 and pressed against the ground contact portion 13b of the ground contact 13 facing the press-fitting grooves 17, and the ground bar 14 is fixed to the insulating housing 11. The fixing to the insulating housing 11 by pressurizing the ground bar 14 downward may be performed before the heating step, separately from the heating step of the solder plate 20.

  As shown in FIGS. 2 and 4, the outer conductor 4 of the micro coaxial cable 1 is sandwiched between the ground bar 14 formed in a waveform and the first guide groove 6 by a soldering process for melting the solder plate 20. The micro coaxial cable 1 that is electrically connected to the ground barter 14 and aligned in the arrangement direction and the front-rear direction is positioned and fixed to the ground bar 14 that is fixed to the insulating housing 11 in the aligned state. Whether or not each outer conductor 4 and the ground bar 14 are surely soldered can be visually confirmed from the opening 14c. If insufficient, soldering is supplemented through the opening 14c.

  Further, by pushing the ground bar 14 in the direction of the insulating housing 11, the outer conductor 4 of each micro coaxial cable 1 is connected to the outer conductor connecting portion 13 c of the ground contact 13 projecting into the first guide groove 6. The ground bar 14 is electrically connected to the ground contact 13 at a number of positions of the external conductor 4 connected to the external conductor connection portion 13c and the ground contact portion 13b.

  Each micro coaxial cable 1 in which the outer conductor 4 is positioned and fixed to the insulating housing 11 via the ground bar 14 has a center conductor 2 exposed in front of the outer conductor 4 and a center conductor protruding in front of the first guide groove 6. Since it is disposed at a position close to the connecting portion 12a, the central conductor 2 can be easily electrically connected to the central contact 12 by any electrical connection means such as pressure welding, welding, adhesion using a conductive adhesive, or soldering. be able to.

  In the present embodiment, since the intermediate dielectric 3 that is difficult to bend is left at the front end of each micro coaxial cable 1, the front terminal portion including the central conductor 2 is not scattered, Since it is guided in the front-rear direction without being bent by the second guide groove 8, all the central conductors 2 are accurately arranged at positions where the corresponding central conductor connecting portions 12a protrude, and both are easily soldered and connected. be able to.

  The center conductors 2 of all the micro coaxial cables 1 are electrically connected to the corresponding center contacts 12 to complete the terminal connection work to the male connector 10. The assembly of the male connector 10 is further as shown in FIG. Then, the shield case 15 covering the upper and front sides of the insulating housing 11 is engaged with the insulating housing 11 to complete the process. In the assembled male connector 10, since the front end of the micro coaxial cable 1 is covered with the intermediate dielectric 3, the center conductor 2 is short-circuited to the shield case 15 even if it contacts the shield case 15 by mistake due to an assembly error. There is no.

  A female connector 30 is fitted and connected to the male connector 10 in the fitting recess 19. As shown in FIG. 5, when the female connector 30 is connected, the ground contact 13 and the center contact 12 come into contact with the contacts 31 and 32 of the female connector 30, respectively, and the outer conductor 4 of each micro coaxial cable 1 is connected to the contact 31. The center conductor 2 is electrically connected to the corresponding contact 32.

  In the above-described embodiment, since the conductive ground bar 14 is used as the holding plate, it also functions as a shield plate that is electrically connected to the outer conductor 4 of each micro coaxial cable 1 by soldering. For the purpose of fixing the micro coaxial cables 1 aligned with each other to the insulating housing 11 before the center conductor 2 is soldered, it is not always necessary to solder to the outer conductor 4, and it is also necessary to form the conductor with a conductive material. Absent.

  Further, the holding plate may be one that sandwiches and fixes the outer conductor 4 and the jacket 5 behind the first guide groove 6, and if electrical connection with the outer conductor 4 is not required, Only the jacket 5 may be clamped and fixed.

Further, the front end of the micro coaxial cable 1, but leaving the hard intermediate dielectric 3 bends have an insulating tubular portion, but it may also as an insulating tubular portion to leave jacket 5.

  Further, the second guide groove for guiding the intermediate dielectric 3 left at the front end of the micro coaxial cable 1 in the front-rear direction is not necessarily formed on the insulating housing 11 such as the guide rib 7 or the like, as shown in FIG. The guide jig 25 may be formed on the plane of the insulating housing 11.

  The guide jig 25 used in the second embodiment shown in FIG. 6 has a large number of second guide grooves 26 recessed at the same pitch as the first guide grooves 6 from the bottom surface facing the plane of the insulating housing 11. Thus, the guide jig 25 is arranged at the front end of the flat surface of the insulating housing 11 along the arrangement direction so that the second guide groove 26 is in front of the first guide groove 6. In this embodiment, the positioning protrusions that fit into the openings of the second guide grooves 26 on the insulating housing 11 side so that the first guide grooves 6 and the second guide grooves 26 coincide on the same axis in the front-rear direction. 11b protrudes.

  A number of micro coaxial cables 1 arranged in the first guide groove 6 and arranged at equal intervals in the arrangement direction are guided in the front-rear direction by inserting the intermediate dielectric 3 left at the front end into the second guide groove 26. Is done. Therefore, by pushing in the front end, the center conductor 2 can be aligned in the front-rear direction so that the center conductor connection portion 12a of all the micro coaxial cables 1 protrudes. Further, after fixing the fine coaxial cable 1 aligned in the arrangement direction and the front-rear direction with the pressing plate to the insulating housing 11 and solder-connecting the center conductor 2 to the center conductor connecting portion 12a, the guide jig 25 is placed on the insulating housing 11. The shape of the assembled male connector 10 can be simplified and reduced in size.

  In the second embodiment, the second guide groove 26 is recessed in the bottom surface of the guide jig 25. However, the guide jig 25 may be provided as long as it can be disposed on the same axis as the first guide groove 6. The second guide groove 26 may be a through-hole that penetrates the groove or a groove that is recessed in a plane.

  The present invention is suitable for a connector to which a terminal of an ultrafine coaxial cable having a very thin outer diameter of a central conductor is connected.

It is a disassembled perspective view which shows the process of the terminal connection method of the microfine coaxial cable which concerns on one embodiment of this invention. 1 is a perspective view showing a state in which a micro coaxial cable is connected to a male connector 10. FIG. It is a principal part expansion disassembled perspective view of FIG. 1 is a longitudinal sectional view of a male connector 10 to which an extra fine coaxial cable 1 is connected. 3 is a longitudinal sectional view showing a state where the male connector 10 is connected to the female connector 30. FIG. It is a longitudinal cross-sectional view which shows the intermediate process of the terminal connection method of the micro coaxial cable which concerns on other embodiment. It is a top view which shows the preliminary | backup process of the terminal connection method of the conventional microfine coaxial cable. It is a top view which shows the intermediate | middle process for the conventional terminal connection method of a micro coaxial cable.

Explanation of symbols

1 Micro Coaxial Cable 2 Center Conductor 3 Intermediate Dielectric 4 Outer Conductor 5 Jacket 6 First Guide Groove (Guide Groove)
8 Second guide groove 10 Male connector (connector)
DESCRIPTION OF SYMBOLS 11 Insulation housing 12 Center contact 13 Ground contact 13b Ground contact part 13c External conductor connection part 14 Ground bar (pressing plate)
14b Press-fit piece 17 Press-fit groove 20 Solder plate 25 Guide jig 26 Second guide groove

Claims (5)

A plurality of micro coaxial cables formed by alternately covering intermediate dielectrics, outer conductors, and jackets from the central conductor toward the outer periphery are arranged on the plane of the insulating housing of the connector at predetermined intervals, and each of the micro coaxial cables is arranged. A terminal connection method for a micro coaxial cable for electrically connecting a center conductor exposed at a front terminal portion of the center conductor to a center contact fixed to the insulating housing,
An insulating cylinder having an outer peripheral surface of the intermediate dielectric or the jacket is left at the front end of each of the micro coaxial cables, and the center conductor, the intermediate dielectric, and the outer conductor are alternately arranged backward from the insulating cylinder. A first step of exposing;
On the plane of the insulating housing, a first guide groove that is recessed at a predetermined interval in the arrangement direction of the multiple micro coaxial cables, and on the plane of the insulating housing corresponding to the front of each first guide groove. The outer conductor or the jacket, which is exposed behind the center conductor of the micro coaxial cable, and the insulating tube portion are arranged in the recessed second guide groove, and the plurality of micro coaxial cables are arranged at predetermined intervals. The outer conductor or the jacket and the insulating tube portion exposed at the rear of the center conductor of each of the micro coaxial cables are aligned with each other in the direction and are exposed by the first guide groove and the second guide groove. A second step of guiding along the longitudinal direction of the
A third step of aligning the multiple micro coaxial cables in the front-rear direction so that a center conductor of each of the micro coaxial cables is disposed in the vicinity of the center contact protruding rearward of the second guide groove;
An outer conductor or jacket of the micro coaxial cable is interposed between the first guide groove and the pressing plate by bridging a pressing plate above the multiple micro coaxial cables and fixing the pressing plate to the insulating housing. A fourth step of sandwiching and positioning and fixing the micro coaxial cable with respect to the insulating housing;
And a fifth step of electrically connecting the center conductor of each of the micro coaxial cables to the center contact protruding to the corresponding portion by welding or soldering. In the fourth step, the outer conductor of the micro coaxial cable sandwiched between the first guide groove and the pressing plate is fixed to the insulating housing so as to protrude into the first guide groove. The terminal connection method of a micro coaxial cable according to claim 1 , wherein the terminal is electrically connected to the terminal. The holding plate is a ground bar made of a conductive metal plate that sandwiches the outer conductor of the micro coaxial cable with the first guide groove in the fourth step, and before or after the fifth step, The micro coaxial cable according to claim 1 or 2 , further comprising a sixth step of electrically connecting the outer conductor of the micro coaxial cable positioned and fixed to the insulating housing and the ground bar by soldering. Terminal connection method. The center contact projecting rearward of the second guide groove is formed with a bifurcated tip, and in the fifth step, the center conductor of each of the micro coaxial cables is electrically connected between the fork of the center contact. The terminal connection method of a micro coaxial cable according to any one of claims 1 to 3, characterized in that: A plurality of micro coaxial cables formed by alternately covering intermediate dielectrics, outer conductors, and jackets from the central conductor toward the outer periphery are arranged on the plane of the insulating housing of the connector at predetermined intervals, and each of the micro coaxial cables is arranged. A terminal connection method for a micro coaxial cable for electrically connecting a center conductor exposed at a front terminal portion of the center conductor to a center contact fixed to the insulating housing,
An insulating cylinder having an outer peripheral surface of the intermediate dielectric or the jacket is left at the front end of each of the micro coaxial cables, and the center conductor, the intermediate dielectric, and the outer conductor are alternately arranged backward from the insulating cylinder. A first step of exposing;
A guide jig having second guide grooves recessed at the same pitch as the predetermined intervals on a plane of the insulating housing having first guide grooves recessed at predetermined intervals in the arrangement direction of the multiple micro coaxial cables. A second step of arranging the second guide grooves so as to correspond to the front of each of the first guide grooves;
The outer conductor or the jacket exposed to the rear of the center conductor of the micro coaxial cable and the insulating tube portion are respectively arranged in the first guide groove and the second guide groove in front of the first guide groove, and the plurality of micro coaxial cables are arranged. The outer conductor or jacket exposed behind the center conductor of each of the micro coaxial cables and the insulating tube portion are aligned with each other by the first guide groove and the second guide groove. A third step of guiding along the longitudinal direction of the axial direction of the coaxial cable;
A fourth step of aligning the multiple micro coaxial cables in the front-rear direction so that a center conductor of each of the micro coaxial cables is disposed in the vicinity of the center contact protruding rearward of the second guide groove;
An outer conductor or jacket of the micro coaxial cable is interposed between the first guide groove and the pressing plate by bridging a pressing plate above the multiple micro coaxial cables and fixing the pressing plate to the insulating housing. A fifth step of sandwiching and positioning and fixing the micro coaxial cable with respect to the insulating housing;
A sixth step of electrically connecting the center conductor of each of the micro coaxial cables to the center contact protruding to the corresponding portion by welding or soldering;
A terminal connection method for an ultrafine coaxial cable, comprising: a seventh step of removing the guide jig from a plane of the insulating housing before or after the sixth step.

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