JP5156538B2 - Shield connector - Google Patents

Description

  The present invention relates to a connection of a cable such as a wire harness to an electric device such as an automobile, and more particularly to a shield connector connected to a terminal portion of a shielded cable connected to a printed circuit board or an antenna in the electric device. .

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

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

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

  An example of such a shield connector is disclosed in Patent Document 1 below. FIG. 8 shows a longitudinal section of the shield connector. As shown in the figure, the shield connector 50 is connected to a portion where the insulator Wb and the sheath We of the coaxial cable W are peeled off and the signal conductor Wa and the shield conductor Wd are exposed. The inner conductor terminal 51 is connected to the signal conductor Wa via the crimping portion 51a, and the outer conductor terminal 53 is connected to the shield conductor Wd via the crimping portion 53a. A dielectric 52 that insulates both the terminals is provided. It is provided between both terminals.

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

  Normally, the characteristic impedance of the shield connector is adjusted by adjusting the ratio of the inner diameter of the shell of the outer conductor terminal to the outer diameter of the terminal of the inner conductor terminal and the relative dielectric constant of the dielectric so that impedance matching with the coaxial cable can be achieved. As shown in FIG. 8, the outer diameter of the crimped portion 51a after the inner conductor terminal 51 is crimped has a size and shape giving priority to the reliability of electrical connection with the signal conductor Wa. In general, since the outer diameter of the terminal portion 51b is smaller than the outer diameter of the terminal portion 51b, the “ratio of the inner diameter of the shell portion 53b of the outer conductor terminal 53 to the outer diameter of the crimp portion 51a of the inner conductor terminal 51” at the position of the crimp portion 51a The “ratio between the inner diameter of the shell portion 53b of the outer conductor terminal 53 and the outer diameter of the terminal portion 51b of the inner conductor terminal 51” at the position 51b is not the same. For this reason, the characteristic impedance at the crimping portion 51 a of the inner conductor terminal 51 is not matched with the characteristic impedance of the coaxial cable W, and is higher than the characteristic impedance of the coaxial cable W.

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

  In order to improve this, the outer diameter of the crimped part after crimping of the inner conductor terminal should be reduced because the characteristic impedance at the crimped part position of the inner conductor body terminal should be lowered so as to match the characteristic impedance of the coaxial cable. It is possible to achieve impedance matching by increasing the diameter to the outer diameter of the terminal portion. Conventionally, as a method of increasing the outer diameter of the crimping portion, there is a method of winding a conductive tape around the crimping portion.

JP 2000-173725 A

  However, in the method of winding the conductive tape around the crimping part and increasing the conductor cross-sectional area of this part, the work of winding the thin conductive tape many times so that the cross-sectional area becomes a predetermined size always with good reproducibility There was a problem that it was difficult and complicated.

  Therefore, the problem to be solved by the present invention is to reduce the characteristic impedance, which has been high at the connection portion between the inner conductor terminal of the shield connector and the signal conductor of the shield cable, to the conductive tape at this connection portion. It is possible to provide a shield connector that can reduce the number of times of winding the wire and can form the outer diameter of the connecting portion in various sizes.

In order to solve the above-described problems, a shield connector according to the present invention is provided in the signal conductor of a shielded cable in which an insulator is interposed between the signal conductor and the shield conductor, and an outer periphery of the shield conductor is covered with a sheath. An inner conductor terminal to be connected; and an outer conductor terminal that accommodates the inner conductor terminal with a dielectric interposed therebetween and is connected to the shield conductor. The inner conductor terminal is connected to the signal conductor. A signal conductor connection portion is provided, and a conductive tape having a band shape is wound around the outer periphery of the signal conductor connection portion after connection in order to electrically increase the outer diameter of the signal conductor connection portion. In addition, the gist is that a conductive plate material is sandwiched between the conductive tape and the signal conductor connecting portion, and the conductive plate material is joined to one end of the conductive tape .

  According to the shield connector having such a configuration, the outer diameter of the signal conductor connection portion is electrically increased on the outer periphery of the signal conductor connection portion of the inner conductor terminal after connection with the signal conductor. A conductive tape having a band shape is wound, and a conductive plate material is sandwiched between the conductive tape and the signal conductor connection portion, so that the diameter is smaller than the terminal portion of the inner conductor terminal. High impedance in the vicinity of the signal conductor connection can be reduced, eliminating impedance mismatch with the shielded cable, and reducing the number of times the conductive tape is wound to reduce the number of times the conductive tape is wound. The workability of winding the conductive tape around the signal conductor connecting portion can be improved, and the conductor cross-sectional area of this portion can always be formed in a predetermined size with good reproducibility. In addition, by changing the size of the sandwiched conductive plate material, the size of the signal conductor connecting portion when the diameter is increased can be formed in various sizes.

Further, since the conductive plate at one end of the conductive tape is a structure that has been joined, by simply winding such a conductive tape to the signal conductor connecting portion, and the conductive tape and the signal conductor connecting portion In addition to improving the workability when winding the conductive tape with the conductive plate sandwiched between the conductive tape and the conductive plate, the conductive tape and the conductive plate are joined and integrated. These are easy to handle.

  Further, if a conductive adhesive layer is formed on at least the inner surface of the conductive tape, the conductive tape wound around the signal conductor connection portion particularly when the thickness of the conductive tape is thin. Is prevented from accidentally coming off.

  Further, in the case where the upper surface of the signal conductor connecting portion has two ridge-shaped surfaces and a valley-shaped surface between the two ridge-shaped surfaces, the conductive tape is used at the upper surface position of the signal conductor connecting portion. If the lower surface of the conductive plate member to be sandwiched is wider than the valley-shaped surface, the conductive plate member is sandwiched while being stably fixed to the upper surface of the signal conductor connecting portion having such a shape with a conductive tape. be able to. In particular, when the signal conductor connecting portion of the inner conductor terminal is a general crimping portion, the upper surface usually has a shape composed of two ridged surfaces and a valleyd surface between the two ridged surfaces. Therefore, the height and width of the conductive tape and the conductive plate after winding can be formed constant in such a crimping portion.

  Then, if the conductive plate member is formed with a protruding portion that is fitted and positioned in the valley-like surface of the signal conductor connecting portion, the conductive plate member is placed at a predetermined position on the upper surface of the signal conductor connecting portion. The conductive plate material can be sandwiched stably. In addition, since the conductive plate is prevented from shifting in the left-right direction from the upper surface of the signal conductor connecting portion during winding with the conductive tape, the winding operation is easy to perform.

  According to the shield connector of the present invention, the outer periphery of the signal conductor connection portion of the inner conductor terminal after connection with the signal conductor has a band shape to electrically increase the outer diameter of the signal conductor connection portion. Since the conductive tape is wound and the conductive plate is sandwiched between the conductive tape and the signal conductor connection portion, the signal conductor has a smaller diameter than the terminal portion of the inner conductor terminal. The high impedance in the vicinity of the connecting part can be lowered, the impedance mismatch with the shield cable is eliminated, and the conductive tape is reduced by reducing the number of times the conductive tape is wound by the size of the conductive plate material. It is possible to improve the workability of winding around the signal conductor connecting portion. Further, the size of the signal conductor connecting portion can be formed in various sizes by changing the size of the sandwiched conductive plate material.

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

  As shown in FIG. 1, the shield connector 1 has an inner conductor terminal 2 connected to a signal conductor Wa of the coaxial cable W at the end of the coaxial cable W, and the inner conductor terminal 2 is accommodated and held by a dielectric 5. The dielectric 5 is constituted by an outer conductor terminal 6 which is connected to the shield conductor Wd of the coaxial cable W.

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

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

  The inner conductor terminal 2 of the shield connector 1 connected to the signal conductor Wa is formed by integrally bending a conductive plate material, has a so-called female terminal shape, and the signal conductor Wa. Are provided on the rear side, and a terminal part 4 connected to a male inner conductor terminal of a mating connector (not shown) is provided on the front side.

  As shown in FIG. 2A, the crimping portion 3 of the inner conductor terminal 2 before crimping is directed upward from the bottom plate portion of the crimping portion 3 on which the signal conductor Wa terminal portion of the coaxial cable W is placed. A pair of pressure-bonding pieces 3a, 3a having a belt-like shape extending in this manner is formed. The crimping pieces 3a, 3a are widened toward the top and have a sufficient length so that they can be wound around signal conductors of coaxial cables of various diameters.

  As shown in the figure, the crimping portion 3 is crimped by a crimper 101 disposed above and an anvil 102 disposed below. In this case, the crimper 101 has a bilaterally symmetrical inner surface shaped like two ridges having the same height, and the left and right depressions 101a, 101a and the central portion where these two depressions 101a, 101a are connected. A protrusion 101b is formed on the surface. Further, the upper surface of the anvil 102 has a substantially arc shape. With such a crimper 101 and an anvil 102, the pair of left and right crimping pieces 3a, 3a are bent at the same timing.

  As shown in FIG. 2A, when the crimper 101 descends from above the signal conductor Wa placed on the upper surface of the bottom plate portion of the crimping portion 3, the left and right crimping pieces are first placed in the recesses 101 a and 101 a of the crimper 101. The tips of 3a and 3a come into contact with each other, and the crimping pieces 3a and 3a begin to bend inward along the recesses 101a and 101a. Then, the tips of the crimping pieces 3a and 3a come into contact with each other at the center protruding portion 101b and bend downward, whereby the crimping pieces 3a and 3a are crimped to the signal conductor Wa as shown in FIG. Connected.

  As shown in FIG. 1, the terminal portion 4 of the inner conductor terminal 2 has a substantially cylindrical shape, and is provided with a pair of elastic contact pieces 4 a and 4 a formed by being folded inside the terminal portion 4. Yes. These elastic contact pieces 4a and 4a can be elastically bent and deformed, and elastically when a tab portion of a male inner conductor terminal of a mating connector (not shown) is inserted between the elastic contact pieces 4a and 4a. The signal can be exchanged by contact. Further, on the upper surface of the terminal portion 4, a locking piece 4 b is provided so as to be elastically bent and deformable upward.

  The dielectric 5 that accommodates and holds the inner conductor terminal 2 is integrally formed in a substantially cylindrical shape with an insulating synthetic resin having a predetermined dielectric constant, and the inner conductor terminal 2 is formed by the dielectric 5. And the outer conductor terminal 6 are insulated. A terminal accommodating chamber 5a that opens in the front-rear direction is formed through the dielectric 5 so that the inner conductor terminal 2 is accommodated and held in the terminal accommodating chamber 5a. A locking hole 5b for locking the locking piece 4b of the inner conductor terminal 2 is formed in the ceiling surface behind the terminal accommodating chamber 5a, and the locking of the inner conductor terminal 2 is performed in the locking hole 5b. When the piece 4b is locked, the inner conductor terminal 2 is held so as not to easily come out of the terminal accommodating chamber 5a. A lock protrusion 5c is provided on the lower surface of the rear side of the dielectric 5 so as to protrude downward.

  The outer conductor terminal 6 in which such a dielectric 5 is housed is formed by integrally forming a conductive plate material by bending it, and the front of the substantially cylindrical shell portion 7 in which the dielectric 5 is housed. And a crimping portion 8 to which the coaxial cable W is fixed by crimping.

  On the lower surface on the front side of the shell portion 7 is a stabilizer 7a that is inserted into a slit formed in the bottom surface of the housing portion of the connector housing when the outer conductor terminal 6 is housed in the housing portion of the connector housing (not shown). Is formed to protrude. The direction in which the outer conductor terminal 6 is inserted into the connector housing is regulated by the stabilizer 7a. Further, at the tip of the opening 7b generated by the formation of the stabilizer 7a, when the outer conductor terminal 6 is inserted into the connector housing, the stabilizer 7a is guided by the bottom slit of the housing portion of the connector housing. Is formed in a tapered shape.

  A lock piece 7d that engages with a lock protrusion 5c protruding from the rear lower surface of the dielectric 5 is formed on the lower lower surface of the shell portion 7 so as to be able to bend and deform upward. When the body 5 is inserted into the shell portion 7 of the outer conductor terminal 6 from the front, the dielectric 5 is held so as not to easily come off. In addition, on the left and right side walls of the shell portion 7, tongue-shaped contact pieces (not shown) that elastically contact the outer wall of the outer conductor terminal of the mating connector are formed.

  The crimping portion 8 of the outer conductor terminal 6 is formed in a step shape so that the shield conductor Wd terminal portion and the sheath We terminal portion of the coaxial cable W are appropriately placed. The crimping portion 8 includes a pair of strip-shaped shield conductor crimping pieces 8a and 8a extending upward from the bottom surface of the crimping portion 8 and a pair of strip-shaped sheath crimping pieces 8b and 8b. In order. These crimping pieces 8a and 8b have a sufficient length so as to be wound around coaxial cables having various diameters.

  A through-hole 8c is formed in the center of the bottom surface of the crimping portion 8 where the shield conductor Wd terminal portion is placed, and the shield conductor Wd terminal portion is crimped by the shield conductor crimping pieces 8b and 8b. Then, a part of the shield conductor Wd enters the through hole 8c.

  As shown in FIGS. 3B and 3C, the outer periphery of the crimping portion 3, which is a connection portion between the inner conductor terminal 2 of the shield connector 1 having such a configuration and the signal conductor Wa, is connected to the signal conductor Wa. The conductive tape 9 is wound so as to cover the outer periphery of the crimped portion 3 after the crimping process, that is, the upper surface 3b, the left and right side surfaces 3e, 3e, and the lower surface 3f. Further, a conductive plate 10 is sandwiched between the upper surface 3a of the crimping part 3 and the wound conductive tape 9. The conductive tape 9 and the conductive plate member 10 are electrically connected to the crimping portion 3, so that the outer diameter of the crimping portion 3 is electrically increased.

  As shown in FIG. 3A, the conductive tape 9 is formed in a band shape having a predetermined thickness, and a conductive plate 10 is joined to one end. As this conductive tape 9, a metal tape or conductive resin formed into a tape shape is used. The conductive plate 10 is formed by punching a plate-like member having conductivity, such as a metal plate, into a rectangular cross section, and the corners of four corners are rounded. The conductive plate 10 is joined to the conductive tape 9 by a conductive adhesive, welding, or the like. Thus, by making the structure which joined the electroconductive board | plate material 10 to the end of the electroconductive tape 9, the electroconductive tape 9 is pinched | interposed between the electroconductive tape 9 and the crimping | compression-bonding part 3, and the electroconductive tape 9 is wound. The workability at the time is improved, and the conductive plate 10 and the conductive tape 9 are integrated by joining, so that they can be easily handled before winding.

  As shown in the drawing, the crimping portion 3 crimped to the signal conductor Wa has an upper surface 3b having two mountain-shaped surfaces 3c and 3c, and a valley-shaped surface 3d between the two mountain-shaped surfaces 3c and 3c. It has a shape with.

  Corresponding to the shape of the upper surface 3 b of the crimping part 3, the contact surface 10 a that is the lower surface of the conductive plate 10 in contact with the upper surface 3 b is wider than the valley-shaped surface 3 d of the upper surface 3 b of the crimping part 3. More specifically, the left and right widths of the contact surface 10a are longer than the length connecting the apexes of the adjacent mountain surfaces 3c, 3c.

  In this case, the area of the contact surface 10a of the conductive plate 10 is made narrower than the valley-shaped surface 3d, and the contact surface 10a is in contact only with the concave-shaped valley-shaped surface 3d, that is, the contact surface 10a is small. When the conductive plate 9 is wound in a state where the conductive plate 10 is slightly shifted in either the left or right direction, the contact surface 10a is turned into the valley-shaped surface 3d. Does not touch and contacts one of the mountain-shaped surfaces 3c, and as a result, enters the valley-shaped surface 3d and contacts one of the mountain-shaped surfaces 3c without entering the valley-shaped surface 3d. In this case, the heights of the cross-sectional areas of the conductors at the position of the crimping part 3 after winding differ.

  Therefore, in the case where the upper surface 3b of the crimping part 3 has two mountain-shaped surfaces 3c and 3c and a valley-shaped surface 3d between the two mountain-shaped surfaces 3c and 3c as shown in the drawing, the crimping is performed. By making the contact surface 10a of the conductive plate 10 that is in contact with the upper surface 3b of the portion 3 wider than the valley-shaped surface 3d and making contact with only the mountain-shaped surfaces 3c and 3c, the conductive plate 10 Even when the conductive tape 9 is wound in a state where is slightly deviated in either of the left and right directions, it is possible to prevent the heights of the conductor cross-sectional areas from being different at the position of the crimping portion 3 after winding. .

  As a result, the conductive tape 10 can be wound in a state where the contact surface 10a of the conductive plate 10 is in contact with the upper surface 3b of the crimping portion 3 in a predetermined state. It becomes easy to form the height of these conductor cross-sectional areas at three positions to a predetermined length, and the conductor cross-sectional area of this portion can always be formed to a predetermined size with good reproducibility. .

  Next, a procedure for connecting the crimping portion 3 of the inner conductor terminal 2 to the terminal portion of the signal conductor Wd by crimping, and winding the conductive tape 9 around the outer periphery of the crimping portion 3 after the crimping processing of the inner conductor terminal 2 The procedure to do is demonstrated.

  As shown in FIG. 2A, first, the signal conductor Wa terminal portion is placed on the bottom plate portion of the crimp portion 3 of the inner conductor terminal 2. Thereafter, the crimping process is performed by the crimper 101 and the anvil 102, whereby the respective crimping pieces 3a and 3a are bent inward to be in a state as shown in FIG. 2 (b) and FIG. 2 (c). As a result, the inner conductor terminal 2 is electrically connected to the signal conductor Wa via the crimping portion 3.

  Then, the conductive tape 9 in which the conductive plate member 10 is bonded to the one end described above is wound around the crimp portion 3 of the inner conductor terminal 2 in this state. As shown in FIG. 3A, first, the conductive plate 10 is disposed above the crimping portion 3, and the conductive plate 10 is lowered and placed on the upper surface 3 b of the crimping portion 3. After that, by winding the conductive tape 9 a plurality of times, the state shown in FIGS. 3B and 3C is obtained, and the conductive plate 10 and the conductive tape 9 are electrically connected to the crimping portion 3. Thus, the diameter of the crimping portion 3 is electrically increased.

  Thereby, the high characteristic impedance in the vicinity of the crimping part 3 after the crimping process, which has a smaller diameter than the terminal part 4 of the inner conductor terminal 3, is matched with the characteristic impedance of the part other than the crimping part 3 of the coaxial cable W or the shield connector 1. Can be as low as possible.

  Thus, by the structure which winds the electroconductive tape 9 so that the electroconductive board | plate material 10 may be pinched | interposed into the crimping | compression-bonding part 3, the frequency | count of winding the electroconductive tape 9 can be reduced by the magnitude | size of the electroconductive board | plate material 10 conventionally. Therefore, the workability of winding the conductive tape 9 around the crimping part 3 is improved. Further, by changing the size of the conductive plate 9 to be sandwiched, these conductor cross-sectional areas at the position of the crimping portion 3 after winding can be formed in various sizes. Conventionally, in order to greatly change the conductor cross-sectional area at the position of the crimping portion 3 after winding, the number of times of winding the conductive tape must be increased. In the present invention, the conductive tape 9 is attached to the crimping portion 3. The conductor cross-sectional area at the position of the crimping portion 3 can be greatly changed by simply changing the size of the conductive plate 10 to be sandwiched without changing the number of windings.

  Next, a shield connector according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a longitudinal sectional view of the shield connector connected to the coaxial cable, and FIG. 5 shows a procedure for winding the conductive tape so that the conductive plate material is sandwiched between the crimp portions of the inner conductor terminals connected to the signal conductor. Yes. In addition, about the same structure as the shield connector 1 of 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  As shown in FIG. 4, the shield connector 20 is electrically bonded to the inner surface of the conductive tape 9 wound around the crimping portion 3 after the crimping process of the inner conductor terminal 2 with the shield connector 1 of FIG. The difference is that the layer 9a is formed.

  As shown in FIG. 5 (a), a conductive adhesive layer 9a is formed on the entire inner surface of the conductive tape 9, and the conductive plate 10 is conductive through the conductive adhesive layer 9a. The adhesive tape 9 is bonded to one end. Since the conductive adhesive layer 9a is formed on the inner surface of the conductive tape 9, as shown in FIGS. 5 (b) and 5 (c), the wound conductive tapes 9 overlap each other. The portions are conductively connected and bonded by the conductive adhesive layer 9a. Therefore, by forming the conductive adhesive layer 9a on at least the inner surface of the conductive tape 9 in this manner, especially when the thickness of the conductive tape 9 is thin, the wound conductive tape is careless. It is prevented from slipping out or coming off.

  Next, a shield connector according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a longitudinal sectional view of the shield connector connected to the coaxial cable, and FIG. 7 shows a procedure for winding the conductive tape so that the conductive plate is sandwiched between the crimp portions of the inner conductor terminals connected to the signal conductor. Yes. In addition, about the same structure as the shield connector 1 of 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  As shown in FIG. 6, the shield connector 30 is electrically connected to one end of a conductive tape 9 wound around the crimping portion 3 after the crimping process of the inner conductor terminal 2 with the shield connector 1 of FIG. 1. The difference is that a convex portion is formed on the contact surface 10 a of the plate 10.

  As shown in FIG. 7A, a convex portion 10 b that protrudes downward is formed at the center of the contact surface 10 a that is the lower surface of the conductive plate 10. The convex portion 10b is sized to fit into the valley-like surface 3d of the upper surface 3b of the crimping portion 3 after the crimping process. Therefore, as shown in FIG. 7B, when the conductive plate 10 is placed on the upper surface 3 b of the crimping portion 3, the convex portion 10 b of the conductive plate 10 is fitted into the valley-shaped surface 3 d of the crimping portion 3. Since the positioning is performed, it is possible to prevent the conductive plate 10 from being displaced from the upper surface 3b of the pressure-bonding portion 3 in the left-right direction during the winding with the conductive tape 9, and the winding operation is facilitated. Further, even after winding, the conductive plate 10 is positioned on the upper surface 3b of the crimping portion 3 by the convex portion 10b, so that the conductive plate 10 is prevented from being displaced due to vibration or the like.

  According to the shield connector 1 (20, 30) described above, the outer periphery of the signal conductor connection portion (crimping portion) 3 of the inner conductor terminal 2 after connection with the signal conductor Wa is provided outside the signal conductor connection portion 3. In order to increase the diameter electrically, a conductive tape 9 having a band shape is wound, and a conductive plate 10 is sandwiched between the conductive tape 9 and the signal conductor connecting portion 3. Therefore, the workability of winding the conductive tape 9 around the signal conductor connecting portion 3 can be improved by reducing the number of times of winding the conductive tape 9 as compared with the conventional size by the size of the conductive plate 10. In addition, the conductor cross-sectional area of this portion can always be formed to a predetermined size with good reproducibility.

  Thus, the workability of winding the conductive tape 9 can be improved, and the high impedance in the vicinity of the signal conductor connecting portion 3 having a smaller diameter than the terminal portion 4 of the inner conductor terminal 2 can be reduced, and the shield Impedance mismatch with the cable W is eliminated. In addition, by changing the size of the conductive plate member 10 to be sandwiched, the size of the signal conductor connecting portion 3 when the diameter is increased can be formed in various sizes.

  In this case, since the conductive plate 10 is joined to one end of the conductive tape 9, the conductive tape 9 and the signal conductor connecting portion can be simply wound around the signal conductor connecting portion 3. Since the conductive plate material 10 is sandwiched between the conductive plate material 10 and the conductive tape 9 is wound, the workability of the conductive tape material 10 is improved and the conductive plate material 10 and the conductive tape 9 are joined and integrated. These are easy to handle before winding.

  In this case, if the conductive adhesive layer 9a is formed on at least the inner surface of the conductive tape 9, the conductive tape 9 is wound around the signal conductor connecting portion 3 particularly when the conductive tape 9 is thin. It is possible to prevent the conductive tape 9 from being inadvertently detached due to vibration or the like.

  Further, when the upper surface 3b of the signal conductor connecting portion 3 has two mountain-shaped surfaces 3c, 3c and a valley-shaped surface 3d between the two mountain-shaped surfaces 3c, 3c, the upper surface of the signal conductor connecting portion 3 is used. Since the lower surface of the conductive plate 10 sandwiched between the conductive tapes 9 at the position 3b is wider than the valley-shaped surface 3d, the conductive plate 10 is placed on the upper surface 3b of the signal conductor connecting portion 3 having such a shape. 9 can be pinched while being stably fixed. In particular, as described above, when the signal conductor connecting portion of the inner conductor terminal 2 is the general crimping portion 3, the upper surface 3b is usually two crest surfaces 3c, 3c and the two crest surfaces 3c, Since it has the shape which consists of the valley-shaped surface 3d between 3c, the height and width | variety of the electroconductive tape 9 and the electroconductive board | plate material 10 after winding are formed in such a crimping | compression-bonding part 3 uniformly. Can do.

  And if the convex part 10b which fits and is positioned in the trough-shaped surface 3d of the upper surface 3b of the signal conductor connection part 3 is protrudingly formed in the electroconductive board | plate material 10, the predetermined | prescribed upper surface 3b of the signal conductor connection part 3 is predetermined. The conductive plate 10 can be sandwiched stably at the position. In addition, since the conductive plate 10 is prevented from shifting in the left-right direction from the upper surface 3b of the signal conductor connecting portion 3 during winding with the conductive tape 9, the winding operation is easy to perform.

  The embodiments of the shield connector according to the present invention have been described above. However, the present invention is not limited to these embodiments, and can of course be implemented in various modes without departing from the gist of the present invention. It is. For example, although the said embodiment demonstrated the form which winds the electroconductive tape 9 so that the electroconductive board | plate material 10 may be pinched | interposed into the crimping | compression-bonding part 3 as a connection part with the signal conductor Wa of the inner conductor terminal 2, The conductive tape according to the present invention is also applied to connection portions such as a weld connection portion connected by welding as a connection portion with a signal conductor and a solder connection portion connected by soldering as a connection portion with a signal conductor of an inner conductor terminal. It is possible to increase the diameter electrically by winding the wire so as to sandwich the conductive plate material.

  Further, the configuration in which the sandwiching position of the conductive plate 10 is the upper surface 3b has been described, but the sandwiching position of the conductive plate 10 may be the bottom surface 3f and the side surface 3e. It is not limited. Further, two conductive plate members 10 may be used, for example, sandwiched between the upper surface 3b and the lower surface 3f of the crimping portion 3 by winding with the conductive tape 9, and the number of the conductive plate members 10 used is also the above-described embodiment. It is not limited to.

It is a longitudinal section of the shield connector concerning a 1st embodiment of the present invention. FIG. 2 shows a procedure for connecting a signal conductor of a coaxial cable to the crimping portion of the inner conductor terminal shown in FIG. 1 by crimping, and (a) shows the crimping portion of the inner conductor terminal before crimping and the signal conductor of the coaxial cable. Cross-sectional view, (b) is a cross-sectional view of the crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable, and (c) is a crimped portion of the inner conductor terminal after crimping and the signal conductor of the coaxial cable. It is a longitudinal cross-sectional view. It is the figure which showed the procedure which winds an electroconductive tape so that an electroconductive board | plate material may be inserted | pinched in the crimping | compression-bonding part of the inner conductor terminal after the crimping process shown in FIG. 2, (a) is the inner conductor terminal after the crimping process. The cross-sectional view of the conductive tape and the conductive plate before being wound around the crimp portion, (b) is the cross section of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process FIG. 4C is a longitudinal sectional view of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process. It is a longitudinal section of the shield connector concerning a 2nd embodiment of the present invention. It is the figure which showed the procedure which winds an electroconductive tape so that an electroconductive board | plate material may be inserted | pinched in the crimping | compression-bonding part of the inner conductor terminal after the crimping process shown in FIG. 4, (a) is the inner conductor terminal after the crimping process. The cross-sectional view of the conductive tape and the conductive plate before being wound around the crimp portion, (b) is the cross section of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process FIG. 4C is a longitudinal sectional view of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process. It is a longitudinal section of the shield connector concerning a 3rd embodiment of the present invention. It is the figure which showed the procedure which winds a conductive tape so that an electroconductive board | plate material may be inserted | pinched in the crimping | compression-bonding part of the inner conductor terminal after the crimping process shown in FIG. 6, (a) is the inner conductor terminal after the crimping process. The cross-sectional view of the conductive tape and the conductive plate before being wound around the crimp portion, (b) is the cross section of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process FIG. 4C is a longitudinal sectional view of the conductive tape and the conductive plate after being wound around the crimp portion of the inner conductor terminal after the crimping process. It is the longitudinal cross-sectional view which showed schematic structure of the shield connector used conventionally.

Explanation of symbols

1, 10, 20 Shield connector 2 Inner conductor terminal 3 Signal conductor connection (crimp)
3a Crimp piece 3b Upper surface 3c Mountain surface 3d Valley surface 3e Side surface 3f Lower surface 4 Terminal portion 5 Dielectric 6 Outer conductor terminal 7 Shell portion 8 Crimp portion 9 Conductive tape 9a Conductive adhesive layer 10 Conductive plate material 10a Contact surface 10b Protrusion W Coaxial cable Wa Signal conductor Wb Insulator Wd Shield conductor We Sheath W Coaxial cable Wa Signal conductor Wb Insulator Wd Shield conductor We Sheath

Claims (4)

An insulator is interposed between the signal conductor and the shield conductor, and an inner conductor terminal connected to the signal conductor of the shielded cable in which a sheath is coated on an outer periphery of the shield conductor; And an outer conductor terminal connected to the shield conductor, and a signal conductor connecting portion connected to the signal conductor is provided on the inner conductor terminal, and the signal conductor after connection is provided. A conductive tape having a band shape is wound around the outer periphery of the connection portion in order to electrically increase the outer diameter of the signal conductor connection portion, and the conductive tape and the signal conductor connection portion A shield connector, wherein a conductive plate is sandwiched between the conductive tapes, and the conductive plate is joined to one end of the conductive tape . The shield connector according to claim 1 , wherein a conductive adhesive layer is formed on at least an inner surface of the conductive tape. In the case where the upper surface of the signal conductor connection portion has two ridge-shaped surfaces and a valley-shaped surface between the two ridge-shaped surfaces, the signal conductor connection portion is sandwiched by the conductive tape at the upper surface position of the signal conductor connection portion. shield connector according to claim 1 or claim 2 the lower surface of the conductive plate is equal to or wider than the trough surface. 4. The shield connector according to claim 3 , wherein the conductive plate member has a protruding portion that is fitted and positioned in the valley-like surface of the signal conductor connecting portion.

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