JP2010092677A - Coaxial connector and coaxial multipole connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector and a coaxial multipole connector capable of preventing generation of loss such as reflection, attenuation, and resonance in a high frequency signal transmitting line composed of a signal terminal and a ground terminal, capable of connecting a large number of coaxial cables to a counterpart substrate without increasing sizes in its width and thickness directions, capable of properly corresponding to multi-polarization of a signal, improving durability, and improving reliability, although its structure is simple, its cost is low, and it is small. <P>SOLUTION: The signal terminal includes a signal tail part connected to a signal line in a semi-cylindrical part, and a signal contact part making contact with the counterpart signal terminal of a counterpart connector in a tongue-shaped part. The ground terminal includes a ground tail part connected to a ground line in a cylindrical part, a ground body part covering the upper part of the signal tail part in the semi-cylindrical part, and a ground contact part making contact with the counterpart ground terminal of the counterpart connector in the tongue-shaped part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coaxial connector and a coaxial multipolar connector.

  Conventionally, when connecting a coaxial cable that transmits a high-frequency signal to a printed circuit board or the like in electrical equipment, electronic equipment, etc., the signal terminal connected to the signal line of the coaxial cable, A coaxial terminal is connected to a coaxial multipolar connector that is mounted on a board, and includes a shield terminal connected to the shield of the cable (see, for example, Patent Document 1).

  FIG. 6 is a view showing a shield terminal of a conventional coaxial multipolar connector.

  In the figure, reference numeral 851 denotes a shield terminal of the coaxial multipolar connector, the lower end is connected to a ground pin protruding from the surface of the substrate (not shown), the upper end is connected to the end of the shield of the coaxial cable (not shown), A shield is electrically connected to the ground line of the substrate. Further, a signal pin (not shown) protruding from the surface of the substrate is inserted into the center of the hollow shield terminal 851 and connected to a signal line (not shown) of the coaxial cable.

  Here, the shield terminal 851 has a cylindrical portion 852 connected to the end of the shield of the coaxial cable, and a coaxial semi-cylindrical portion 853 integrally connected to the lower end of the cylindrical portion 852. The semi-cylindrical portion 853 has a pair of ground connection portions 854 that extend outward from both ends of the semicircle, and extends downward from the lower ends of the ground connection portions 854 and has a shape of an inward shape. And a pin contact portion 855 that bends in a shape. The cylindrical portion 852 includes a pair of shield contact portions 856 cut and raised toward the inside.

The shield terminal 851 is connected to the ground line of the substrate by the pair of pin contact portions 855 sandwiching the ground pin protruding from the surface of the substrate from both sides. On the other hand, the shield terminal 851 is connected to the shield of the coaxial cable by the pair of shield contact portions 856 sandwiching the end of the shield of the coaxial cable from both sides.
Japanese Patent Publication No. 8-21446

  However, in the conventional coaxial multipole connector, the structure of the high-frequency signal transmission line constituted by the signal pin and the shield terminal 851 surrounding the signal pin is the contact point between the shield of the coaxial cable and the shield contact portion 856. The transmission mode of the transmission line depending on the structure of the transmission line changes abruptly, and depending on the frequency band, reflection, attenuation, resonance, Loss of radiation or the like occurs, and transmission characteristics of high-frequency signals are degraded.

  In addition, when the number of coaxial multipolar connectors and the number of signal pins and ground pins protruding from the surface of the board increase due to an increase in the number of signal channels transmitted by the coaxial cable, the overall size of the connector increases. Therefore, when there is no allowance for the dimensions of the electronic device etc. on which the board is mounted and there are restrictions on the dimensions in the width direction of the connector, it is possible to sufficiently meet the demand for multi-channel transmission of signals, that is, multi-polarization. could not.

  The present invention solves the above-described conventional problems, and includes a semi-cylindrical grounding portion surrounding a half circumference of a signal line exposed from an end of a coaxial cable, a flat signal line connected to the signal line, and the semi-cylindrical member. A plate-shaped relay board having a flat ground wire connected to the ground portion in parallel and arranged on the upper surface in series is arranged in series in the axial direction, so that a high-frequency signal composed of a signal terminal and a ground terminal can be obtained. It can prevent loss of reflection, attenuation, resonance, radiation, etc. in the transmission line and can connect multiple coaxial cables to the other board without increasing the width and thickness dimensions. An object of the present invention is to provide a coaxial connector and a coaxial multipolar connector that are simple in structure, low in cost, small in size, can appropriately cope with multipolarization of signals, and have high durability and high reliability. .

  Therefore, in the coaxial connector of the present invention, the coaxial connector includes a signal terminal connected to the signal line of the coaxial cable and a ground terminal connected to the ground line of the coaxial cable, and has a terminal unit that transmits a high-frequency signal. The connector includes a cylindrical portion, a semi-cylindrical portion disposed in front of the cylindrical portion, and a tongue-shaped portion disposed in front of the semi-cylindrical portion. The signal terminal includes a signal tail portion connected to the signal line in the semi-cylindrical portion, and a signal contact portion in contact with a counterpart signal terminal of the counterpart connector in the tongue portion, and the ground terminal A ground tail portion connected to the ground line in the cylindrical portion, a ground body portion covering the signal tail portion in the semi-cylindrical portion, and a tongue portion There and a ground contact portion for contacting a counterpart ground terminal of the mating connector.

  In another coaxial connector according to the present invention, the signal tail portion may be a flat plate, the signal contact portion may include a flat contact surface portion that contacts a counterpart signal terminal, and the ground main body portion may include the signal tail portion. A semi-cylindrical portion that covers the top of the contact surface portion, the ground contact portion includes a flat contact surface portion that contacts a mating ground terminal, and the contact surface portion of the signal contact portion and the contact surface portion of the ground contact portion are flush with each other. And extend in the axial direction of the terminal unit in parallel with each other at equal intervals.

  In still another coaxial connector of the present invention, the signal terminal further includes a signal connecting portion that connects the signal tail portion and the signal contact portion, and the ground terminal connects the ground tail portion and the ground contact portion. A connecting portion is provided, and the distance between the signal tail portion and the ground tail portion is equal to the distance between the signal connecting portion and the ground connecting portion and the distance between the signal contact portion and the ground contact portion.

  In still another coaxial connector of the present invention, the outer diameter of the cylindrical portion and the semicylindrical portion and the width of the tongue-like portion are substantially equal to the outer diameter of the coaxial cable.

  In still another coaxial connector of the present invention, the thickness of the tongue-like portion is not more than the radius of the coaxial cable.

  In the coaxial multipolar connector of the present invention, the terminal unit includes a signal terminal connected to the signal line of the coaxial cable, a ground terminal connected to the ground line of the coaxial cable, and transmits the high-frequency signal; A coaxial multipolar connector comprising a terminal support member for supporting the unit and having a housing that fits (mates) with a mating housing of the mating connector, the terminal unit comprising a cylindrical portion and a front of the cylindrical portion A signal tail connected to the signal line in the semi-cylindrical portion, and a semi-cylindrical portion disposed in front of the semi-cylindrical portion. And a signal contact portion that contacts a counterpart signal terminal of the counterpart connector at the tongue portion, and the ground terminal is connected to the ground line at the cylindrical portion. Comprising a ground tail portion, wherein the ground body portion for covering the upper side of the signal tail portion in the semi-cylindrical portion, and a ground contact portion for contacting a counterpart ground terminal of the counterpart connector in the tongue to be.

  In another coaxial multipolar connector according to the present invention, the open side of the semi-cylindrical portion is further arranged to face each other.

  According to the present invention, the coaxial connector is connected to the semi-cylindrical grounding portion that surrounds the half circumference of the signal line exposed from the end of the coaxial cable, the flat signal wire connected to the signal line, and the semi-cylindrical ground portion. A strip-shaped relay board on which the flat plate-like grounding wires arranged in parallel on the upper surface are arranged in series in the axial direction. As a result, it is possible to prevent the occurrence of losses such as reflection, attenuation, resonance, and radiation in the transmission line of the high-frequency signal composed of the signal terminal and the ground terminal, and increase the dimensions in the width direction and the thickness direction. A large number of coaxial cables can be connected to the other party's board, and the configuration is simple, low cost, small size, and can appropriately cope with multi-polarization of signals, improving durability and reliability Can be increased.

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

  FIG. 1 is a perspective view showing a state before the cable connector is fitted in the embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a state where the cable connector in the embodiment of the present invention is fitted to the board connector.

  In the figure, reference numeral 1 denotes a cable connector as a coaxial multipolar connector which is an example of a coaxial connector in the present embodiment, which is a connector connected to the tips of a plurality of cables 91 constituting a wire. Then, as shown in FIG. 2, the cable connector 1 is fitted with a board connector 101 as a mating connector connected to one side face (right side face in FIG. 2) of the board 191.

  The board 191 includes, for example, a printed circuit board, a flexible printed circuit (FPC), and a flexible flat cable (FFC) that are used in electronic equipment such as a computer and electrical equipment such as a home appliance. ) Etc., and any type of cable may be used.

  A plurality of connection electrodes (not shown) are arranged on the surface of the substrate 191 so as to be arranged in the width direction of the substrate 191 (direction perpendicular to the drawing in FIG. 2) at a predetermined pitch. Each of the connection electrodes is formed on the surface of the substrate 191 and is connected to each of a plurality of conductive traces (not shown) arranged in the width direction of the substrate 191 at a predetermined pitch. The pitch and number of the connection electrodes and conductive traces can be set as appropriate.

  The cable 91 may be any type of cable. For example, the cable 91 is a thin coaxial cable suitable for transmitting a high-frequency signal. As will be described later, the cable 91 includes a conductive core wire 92 as a signal line disposed in the center, and a metal mesh disposed so as to surround the core wire 92. It is a linear body having a substantially circular cross section provided with a conductive shield member 94 as a ground line composed of the like. The cables 91 are arranged side by side in the width direction of the cable connector 1 and form a plurality of rows. Although the pitch and number of the cables 91 can be set as appropriate, in the example shown in the figure, the cables 91 are arranged side by side in the width direction of the cable connector 1 to form two rows.

  In the present embodiment, the upper, lower, left, right, front, rear, etc. directions are used to explain the configuration and operation of each part included in the cable connector 1, the board connector 101, and other members. The expression shown is relative rather than absolute, and is appropriate when each part included in the cable connector 1, the board connector 101, and other members is in the posture shown in the figure. When the posture of each part included in the board connector 101 and other members changes, it should be interpreted according to the change in posture.

  Here, the cable connector 1 includes a first housing 11 as a housing integrally formed of an insulating material such as a synthetic resin, and a terminal support member 17 disposed in the first housing 11. The terminal support member 17 is a rectangular plate-like member integrally formed of an insulating material such as synthetic resin, and a terminal unit 50 connected to the tip of the cable 91 is attached to the front and back surfaces thereof. It is done. As shown in FIG. 1, a plurality of terminal units 50 are arranged side by side in the width direction of the terminal support member 17, that is, the width direction of the cable connector 1, on the front and back surfaces of the terminal support member 17.

  The first housing 11 includes a terminal accommodating opening 13 that accommodates the terminal support member 17 therein. The terminal accommodating opening 13 is an opening whose periphery is defined by the upper and lower top plate portions 12 and the left and right side plate portions 14 and whose fitting surface side is open. And in the terminal accommodation opening part 13, it is divided | segmented into two upper and lower parts by the terminal support member 17, and the terminal unit 50 is accommodated in each of these two parts. Note that a latching opening 11 a for latching a latching piece 73 d of each terminal unit 50 is formed on the outer surface of the top plate 12.

  The terminal unit 50 connected to the tip of each cable 91 is inserted and fixed to the upper and lower portions of the terminal support member 17 from the back surface (surface opposite to the fitting surface) of the first housing 11. The terminal unit 50 is connected to a relay board 31 which will be described later integrally formed of an insulating material such as a synthetic resin, and is fixed to the relay board 31 and connected to the shield member 94 of the cable 91 by soldering or the like. And a metal ground terminal 71. A plate-like signal contact portion 52 connected to the core wire 92 of the cable 91 and a plate-like ground which is a tip portion of the ground terminal 71 are provided on the upper surface of the strip-like tongue portion 32 of the relay substrate 31. The contact portion 72 is disposed in parallel. Thereby, a plurality of elongated plate-like signal contact portions 52 and ground contact portions 72 extending in the fitting direction of the cable connector 1 are alternately arranged in parallel on the upper and lower surfaces of the terminal support member 17. Arranged one by one. The pitch and number of the terminal units 50 on the upper and lower surfaces of the terminal support member 17 can be set as appropriate.

  On the other hand, the board connector 101 includes a second housing 111 as a counterpart housing formed of an insulating material such as a synthetic resin, and a plurality of conductive members that are formed of a metal having conductivity and loaded into the second housing 111. The other party terminal 161 is provided.

  As shown in FIG. 2, the second housing 111 is provided with a counterpart opening 113 whose fitting surface side is opened, and from the tip of the terminal support member 17 in a state where the board connector 101 and the cable connector 1 are fitted. A predetermined range enters the counterpart opening 113.

  The counterpart terminal 161 is loaded into a plurality of terminal receiving grooves 114 formed on the upper and lower inner surfaces of the second housing 111. The terminal receiving groove 114 also extends into the counterpart opening 113. The counterpart terminal 161 includes a counterpart signal terminal that contacts the signal terminal 51 described later and a counterpart ground terminal that contacts the ground terminal 71. However, since the counterpart signal terminal and the counterpart ground terminal have the same structure, the counterpart terminal 161 will be described here without being identified.

  The counterpart terminal 161 includes a main body portion 162 attached to the terminal receiving groove 114, a cantilever-like contact arm portion 163 extending forward from the main body portion 162, that is, toward the fitting surface, and the contact arm portion. A contact bulging portion 164 protruding toward the center in the thickness direction (vertical direction in FIG. 2) of the second housing 111 in the vicinity of the tip of 163, and a rear side from the main body portion 162, that is, a direction opposite to the fitting surface And a contact leg portion 165 that is formed by bending the middle portion of the second housing 111 and projects outward in the thickness direction of the second housing 111. Note that at least a part of the contact leg 165 is exposed behind the second housing 111.

  The contact bulge portion 164 contacts the signal contact portion 52 and the ground contact portion 72 arranged on both surfaces of the terminal support member 17 in a state where the board connector 101 and the cable connector 1 are fitted. In this case, since the contact arm portion 163 having elasticity functions as a leaf spring, the contact bulge portion 164 is biased to the surfaces of the signal contact portion 52 and the ground contact portion 72 by the biasing force exerted by the contact arm portion 163. The contact with the signal contact portion 52 and the ground contact portion 72 is reliably maintained.

  Further, the substrate 191 and the substrate connector 101 are in contact with connection electrodes (not shown) whose contact legs 165 are exposed on both surfaces of the substrate 191 and are fixed by a conductive fixing means such as solder.

  In this way, when the cable connector 1 is fitted to the board connector 101 coupled to the board 191, the signal contact portion 52 and the ground contact portion 72 of the terminal unit 50 connected to each cable 91 are connected via the counterpart terminal 161. Then, it is electrically connected to the corresponding connection electrode of the substrate 191. Accordingly, the signal line and the ground line of each cable 91 are electrically connected to the corresponding conductive traces on the substrate 191.

  Note that the pitch and number of the counterpart terminals 161 can be appropriately set so as to match the pitch and number of the signal contact portions 52 and the ground contact portions 72 and the pitch and number of the connection electrodes.

  Next, the configuration of the terminal unit 50 will be described in detail.

  3 is a perspective view showing the positional relationship between the terminal unit and the counterpart terminal in the embodiment of the present invention, FIG. 4 is a four-view diagram and a sectional view showing the configuration of the terminal unit in the embodiment of the present invention, and FIG. It is the perspective view and exploded view which show the structure of the terminal unit in embodiment of invention. 4A is a top view, FIG. 4B is a front view, FIG. 4C is a rear view, FIG. 4D is a side view, and FIG. 4E is a sectional view taken along the line ZZ in FIG. (F) is a cross-sectional view taken along the line YY of (a), (g) is a cross-sectional view taken along the line XX of (a), FIG. 5 (a) is a perspective view, and (b) is a ground view. FIG. 3C is an exploded view with the terminals removed, FIG. 3C is an exploded view of the relay board, and FIG.

  In the present embodiment, the terminal unit 50 is connected to the tip of each cable 91 as described above. As shown in FIG. 5B, the cable 91 includes a conductive core wire 92 as a signal line disposed at the center, an insulating inner covering 93 covering the periphery of the core wire 92, and the inner covering 93. A conductive shield member 94 as a ground line made of a metal mesh or the like disposed so as to cover the periphery of the shield member, and an insulating outer covering 95 covering the periphery of the shield member 94. It is a linear body. At the tip of the cable 91, the outer cover 95, the shield member 94, and the inner cover 93 are sequentially removed, and the shield member 94, the inner cover 93, and the core wire 92 are sequentially exposed.

  Further, the terminal unit 50 is fixed to the relay board 31 and integrally connected to the shield member 94 of the cable 91 by soldering or the like, and is integrally formed with an insulating material such as a synthetic resin. A metal ground terminal 71 and a metal strip-like signal terminal 51 coupled to the relay substrate 31 by integral molding. The terminal unit 50 is divided into a cylindrical portion 50a, a semi-cylindrical portion 50b, and a tongue-like portion 50c from the rear to the front in the axial direction.

  As shown in FIG. 5 (c), the relay substrate 31 has a central portion 33 located in the semi-cylindrical portion 50b, and extends forward (leftward in the figure) from the central portion 33, and has a tongue-like portion 50c. A band plate-like tongue portion 32 positioned at the tip portion, a tip portion 37 formed at the tip end of the tongue portion 32 and located at the tongue-like portion 50c, and extending rearward (rightward in the figure) from the central portion 33; The cable receiving part 34 located in the semi-cylindrical part 50b, and the positioning protrusion 35 which protrudes upward in the connection part of the said center part 33 and the cable receiving part 34, and is located in the semi-cylindrical part 50b are provided.

  A covering housing recess 34 a is formed on the top surface of the cable receiving portion 34 to store a portion of the cable 91 where the inner covering 93 is exposed. The positioning projection 35 is formed with a groove 35a through which the exposed core 92 can pass. Further, a tail accommodating recess 33 a for accommodating the signal tail portion 53 of the signal terminal 51 is formed on the upper surface of the central portion 33. Further, a bridge 33b that connects the side walls on both sides of the tail receiving recess 33a is formed above the front end of the tail receiving recess 33a, and the signal received in the tail receiving recess 33a as shown in FIG. 4 (f). The upward displacement of the tail portion 53 is restricted, and the signal tail portion 53 is prevented from being pulled out from the tail accommodating recess 33a. FIG. 5C shows a state in which the signal terminal 51 and the relay board 31 are disassembled in order to facilitate understanding of the structure of the relay board 31. As shown in FIG. 5 (d), a member that cannot be removed from the relay substrate 31 is formed integrally with the relay substrate 31 by a molding method such as overmold molding using a resin. Further, hooking projections 36 for hooking the ground terminal 71 are formed on both side surfaces of the cable receiving portion 34 and the central portion 33.

  Further, on the upper surface of the tongue portion 32, a signal contact portion accommodating recess 32c for accommodating the contact surface portion 52a of the signal contact portion 52 of the signal terminal 51 and a contact surface portion 72a of the ground contact portion 72 of the ground terminal 71 are accommodated. The ground contact portion receiving recess 32b is formed in parallel. And the part between the said signal contact part accommodation recessed part 32c and the ground contact part accommodation recessed part 32b is the elongate linear boundary convex part 32a extended in the axial direction of the cable 91, ie, the axial direction of the terminal unit 50. It has become. The boundary convex portion 32a has a substantially constant width, thereby maintaining a constant distance between the signal contact portion 52 and the ground contact portion 72. Further, the height of the boundary convex portion 32a, that is, the dimension from the upper surface of the signal contact portion accommodating recess 32c and the upper surface of the ground contact portion accommodating recess 32b to the upper surface of the boundary convex portion 32a is determined by the contact surface portion 52a of the signal contact portion 52 and The thickness of the contact surface portion 72a of the ground contact portion 72 is substantially equal to the thickness of the contact surface portion 72a of the ground contact portion 72, and the upper surface of the boundary convex portion 32a is shown in FIG. 4 (e) with the signal terminal 51 and the ground terminal 71 attached to the relay substrate 31. As shown, the contact surface portion 52a of the signal contact portion 52 and the contact surface portion 72a of the ground contact portion 72 are flush with each other.

  Further, an inclined surface 37 a that is inclined forward and downward is formed at the upper end of the distal end edge of the distal end portion 37. The inclined surface 37a functions as a guide surface that guides the contact bulging portion 164 of the counterpart terminal 161. When the cable connector 1 and the board connector 101 are fitted together, the contact bulging portion 164 has an inclined surface 37a. As a result of relatively moving along, the contact surface portion 52a of the signal contact portion 52 and the contact surface portion 72a of the ground contact portion 72 can be smoothly contacted. Concave portions 37b and 37c are formed at the boundary between the tip portion 37 and the ground contact portion receiving recess 32b and the signal contact portion receiving recess 32c. By accommodating the distal end portion 72c of the ground contact portion 72 and the distal end portion 52c of the signal contact portion 52 in the concave portions 37b and 37c, the upper surface of the distal end portion 37 and the contact surface portion 72a and the signal contact portion 52 of the ground contact portion 72 are accommodated. Therefore, when the cable connector 1 and the board connector 101 are fitted together, the contact bulging portion 164 of the mating terminal 161 can be smoothly guided.

  The ground terminal 71 is a member integrally formed by punching or bending a metal plate. And it is located in the said semi-cylindrical part 50b, The ground main-body part 73 which covers the upper surface and side surface of the center part 33 of the relay substrate 31, and the cable receiving part 34, and extends forward from this ground main-body part 73, and a tongue-like part A belt-like ground contact portion 72 located at 50c, a belt-like ground tail portion 74 extending rearward from the ground body portion 73 and located at the cylindrical portion 50a, and a ground contact with the ground body portion 73 And a ground connecting portion 75 that connects the portion 72.

  As shown in FIG. 4G, the ground main body 73 includes a semi-cylindrical semi-cylindrical portion 73a covering the central portion 33 of the relay board 31 and the upper surface of the cable receiving portion 34, and the semi-cylindrical portion 73a. A side surface portion 73b that extends downward from the lower ends of both sides and covers the side surface of the central portion 33 and the cable receiving portion 34, and a hole formed in the side surface portion 73b, and a hooking projection 36 of the relay board 31. A latching hole 73c that is latched on the upper surface of the semi-cylindrical portion 73a, and a cut-and-raised piece formed by raising the upper surface of the semi-cylindrical portion 73a. When it is inserted into this part, it is provided with a latching piece 73d that functions as a retaining member of the terminal unit 50 by being latched by the latching opening 11a of the first housing 11.

  The ground tail portion 74 is a winding portion 74a wound around the exposed shield member 94 of the cable 91, and an opening formed in the upper surface of the winding portion 74a, and is made of a conductive material such as solder. By applying the fixing agent, the ground tail portion 74 and the shield member 94 are physically fixed, and the connection opening 74b is electrically connected. As shown in FIG. 4C, the winding portion 74a preferably covers and contacts the periphery of the shield member 94 within a range of 180 degrees or more and less than 360 degrees.

  Further, the ground contact portion 72 includes a contact surface portion 72a parallel to the upper surface of the tongue portion 32 and a side surface portion 72b parallel to the side surface of the tongue portion 32, and as shown in FIG. The cross-sectional shape is provided. The side surface portion 72 b covers the side surface of the tongue portion 32, and forms the same plane as the side surface portion 73 b of the ground connecting portion 75 and the ground main body portion 73. Further, the ground contact portion 72 includes a distal end portion 72 c formed at the distal end and accommodated in the concave portion 37 b of the distal end portion 37.

  The signal terminal 51 is a member integrally formed by punching or bending a metal plate. And the signal tail part 53 which is located in the said semi-cylindrical part 50b, and contacts the metal core 92 which the cable 91 exposed, and it extends forward from this signal tail part 53, and is a strip | belt-plate shape located in the tongue-like part 50c. The signal contact part 52 and the signal tail part 53 and the signal contact part 52 are provided.

  The signal tail portion 53 is a rectangular flat member, and is accommodated in the tail accommodating recess 33 a of the relay substrate 31. Then, as shown in FIG. 4G, the cored bar 92 is in contact with the upper surface of the signal tail portion 53. Desirably, the signal tail portion 53 and the cored bar 92 are physically fixed and electrically connected by applying a conductive fixing agent such as solder.

  Further, the signal contact portion 52 includes a contact surface portion 52a parallel to the upper surface of the tongue portion 32 and a side surface portion 52b parallel to the side surface of the tongue portion 32, and as shown in FIG. The cross-sectional shape is provided. Like the signal tail portion 53, the contact surface portion 52a extends in the axial direction of the terminal unit 50, but is offset in the width direction of the terminal unit 50 with respect to the signal tail portion 53 as viewed from above. Therefore, the signal connecting portion 55 extends obliquely with respect to the axial direction of the terminal unit 50. The side surface portion 52 b covers the side surface of the tongue portion 32. Further, the signal contact part 52 includes a tip part 52 c formed at the tip and housed in the recess 37 c of the tip part 37.

  As described above, the signal terminal 51 is integrally formed with the relay substrate 31 as shown in FIG. 5D by a molding method such as overmolding with resin. Then, as shown in FIG. 5B, the tip of the cable 91 where the shield member 94, the inner coating 93 and the core wire 92 are sequentially exposed is connected to the relay substrate 31. In this case, the inner sheath 93 is accommodated in the sheath accommodating recess 34a, and the core wire 92 is a signal in which a part thereof is fitted (fitted) into the groove 35a of the positioning projection 35 and the other portion is accommodated in the tail accommodating recess 33a. It is placed on the tail portion 53. Note that the axial positioning of the cable 91 with respect to the relay substrate 31 is performed by bringing the front end of the inner covering 93 into contact with the positioning protrusion 35. Desirably, the signal tail portion 53 and the cored bar 92 are physically fixed and electrically connected by applying a conductive fixing agent such as solder.

  Subsequently, as shown in FIG. 5B, the ground terminal 71 is attached from above the relay substrate 31 to which the tip of the cable 91 is connected. In this case, the ground main body 73 covers the upper surface of the central portion 33 and the cable receiving portion 34 of the relay substrate 31 and the cored bar 92 and the inner cover 93 of the cable 91, and the ground tail portion 74 is the upper surface of the shield member 94 of the cable 91. , So that the contact surface portion 72a of the ground contact portion 72 is accommodated in the ground contact portion accommodating recess 32b of the relay substrate 31. Then, the latching protrusions 36 of the relay substrate 31 are latched in the latching holes 73 c of the ground main body 73. Further, the ground tail portion 74 is deformed so as to cover the periphery of the shield member 94 within a range of 180 degrees or more and less than 360 degrees. Further, by applying a conductive adhesive such as solder to the connection opening 74b, the ground tail portion 74 and the shield member 94 are physically fixed and electrically connected. Thereby, the terminal unit 50 to which the tip of the cable 91 is connected can be obtained.

  In the terminal unit 50, the signal terminal 51 is connected to the core wire 92 of the cable 91, which is a coaxial cable, and functions as a signal line in the transmission line of the high-frequency signal. The ground terminal 71 is connected to the shield member 94 of the cable 91 and functions as a shield that blocks noise, and also functions as a ground line in a transmission line for high-frequency signals. The transmission mode of the transmission line that transmits the high-frequency signal changes according to the structure of the transmission line, specifically, the shape, size, arrangement relationship, etc. of the signal line and the ground line. When the shape, dimensions, arrangement relationship, etc. change abruptly, the transmission mode of the transmission line changes abruptly as explained in the above-mentioned “Problem to be Solved by the Invention”. Depending on the frequency band, reflection, attenuation, resonance As a result, loss of radiation or the like occurs, and the transmission characteristics of the high-frequency signal deteriorate.

  Therefore, in the present embodiment, in the terminal unit 50, the shape, size, arrangement relationship, and the like of the signal terminal 51 functioning as a signal line and the ground terminal 71 functioning as a ground line are gradually changed, so that the high frequency signal The transmission modes of the signal terminal 51 and the ground terminal 71, which are the transmission lines of FIG. More specifically, an elongated belt-like signal tail portion 53 connected to the lower end of the thin cylindrical core wire 92, and a semi-cylinder that covers the signal tail portion 53 over a range of 180 degrees or more. The signal line consisting of the portion 73a and the side surface portion 73b and the ground line are arranged in the form of an elongated strip-like signal connecting portion 55 and an elongated strip-like ground connecting portion 75 extending perpendicularly to the signal connecting portion 55. The arrangement relationship between the signal line and the ground line is changed to the arrangement relationship between the signal line and the ground line, and the signal line 52 and the ground contact portion 72 each having an L-shaped cross section extending in parallel with each other. The transmission mode of the high-frequency signal transmitted by changing to is gradually changed.

  4 (f) and 4 (g), the distance between the signal coupling part 55 and the ground coupling part 75 at the closest part is the distance between the signal tail part 53 and the ground body part 73 at the closest part. It can be seen that they are almost equal. That is, in the range from the signal tail part 53 and the ground main body part 73 to the signal connection part 55 and the ground connection part 75, the distance between the signal line and the ground line is substantially constant.

  4A, the distance between the contact surface portion 72a of the ground connection portion 75 and the ground contact portion 72 and the contact surface portion 52a of the signal connection portion 55 and the signal contact portion 52 is at the tip of the ground main body portion 73. That is, it can be seen that it is substantially constant over substantially the entire range of the tongue 32. That is, in almost the entire range of the tongue portion 32, the distance between the signal line and the ground line formed in parallel on the same plane is substantially constant.

  As described above, in the terminal unit 50, since the distance between the signal line and the ground line is kept constant, the transmission mode of the transmission line does not change abruptly, and losses such as reflection, attenuation, resonance, radiation, etc. occur. It does not occur, and the transmission characteristics of high frequency signals are improved. Therefore, by connecting the terminal unit 50 to the cable 91, which is a coaxial cable, the arrangement relationship between the signal line located at the center and the ground line concentrically surrounding the signal line is abruptly changed in the transmission mode. Arrangement of signal lines and ground lines arranged in parallel on the same plane while maintaining good transmission characteristics of high-frequency signals without causing loss of reflection, attenuation, resonance, radiation, etc. Can be converted into a relationship.

  Further, the outer diameter of the cable 91 is substantially equal to the outer diameter of the cylindrical portion 50a and the semicylindrical portion 50b of the terminal unit 50, and the width of the tongue-like portion 50c is also substantially equal to the outer diameter. That is, as shown in FIG. 4A, the width of the terminal unit 50 is formed to be substantially equal to the outer diameter of the cable 91. And the signal contact part 52 and the ground contact part 72 in the tongue-like part 50c are also arrange | positioned so that it may be settled in the said width | variety. Therefore, as shown in FIG. 3, the pair of counterpart terminals 161 that are in contact with the signal contact portion 52 and the ground contact portion 72 can also be disposed so as to be within the width.

  Further, as shown in FIG. 4D, the height of the cylindrical portion 50 a and the semicylindrical portion 50 b of the terminal unit 50 is also set to the outer diameter of the cable 91 except for the latching piece 73 d of the ground body portion 73. It is formed to be almost equal. Further, the thickness of the tongue-shaped portion 50c, that is, the height of the contact surface portion 52a of the signal contact portion 52 and the contact surface portion 72a of the ground contact portion 72 on the upper surface of the tongue portion 32 is the height below the center of the cable 91, The dimension is equal to or smaller than the radius of the cable 91. Therefore, as shown in FIG. 2, the protruding amount of the contact arm portion 163 from the main body portion 162 in the counterpart terminal 161 in a state in which the contact surface portion 52 a of the signal contact portion 52 and the contact surface portion 72 a of the ground contact portion 72 are in contact with each other is It can be set so as to be within the height of the terminal unit 50.

  Thus, the outer dimension of the terminal unit 50 connected to each cable 91 does not protrude from the outer dimension of the cable 91 except for the hooking piece 73d in the cross-sectional direction of the cable 91. Further, the external dimensions of the pair of counterpart terminals 161 corresponding to the terminal unit 50 do not protrude from the external dimensions of the cable 91 except for the portion on the board 191 side in the cross-sectional direction of the cable 91. Therefore, a large number of cables 91 can be connected to the mating board 191 without increasing the width and thickness dimensions of the cable connector 1 and the board connector 101.

  Thus, in the present embodiment, the cable connector 1 includes the signal terminal 51 connected to the core 92 of the cable 91 and the ground terminal 71 connected to the shield member 94 of the cable 91, and transmits a high-frequency signal. And a terminal support member 17 that supports the terminal unit 50, and a first housing 11 that fits with the second housing 111 of the board connector 101. The terminal unit 50 includes a cylindrical portion 50a, a semi-cylindrical portion 50b disposed in front of the cylindrical portion 50a, and a tongue-like portion 50c disposed in front of the semi-cylindrical portion 50b. The signal terminal 51 includes a signal tail portion 53 connected to the core wire 92 in the semi-cylindrical portion 50b, and a signal contact portion 52 that contacts the mating terminal 161 of the board connector 101 in the tongue-like portion 50c. Includes a ground tail portion 74 connected to the shield member 94 in the cylindrical portion 50a, a ground main body portion 73 covering the signal tail portion 53 in the semicylindrical portion 50b, and a counterpart of the board connector 101 in the tongue-like portion 50c. A ground contact portion 72 that contacts the terminal 161 is provided.

  Thereby, generation | occurrence | production of losses, such as reflection in the transmission line of the high frequency signal of the terminal unit 50, attenuation | damping, resonance, radiation | emission, can be prevented.

  The signal tail portion 53 has a flat plate shape, the signal contact portion 52 includes a flat contact surface portion 52 a that contacts the counterpart terminal 161, and the ground main body portion 73 includes a semi-cylindrical portion 73 a that covers the signal tail portion 53. The ground contact portion 72 includes a flat contact surface portion 72a that contacts the mating terminal 161, and the contact surface portion 52a of the signal contact portion 52 and the contact surface portion 72a of the ground contact portion 72 are flush with each other. The terminal units 50 extend in the axial direction parallel to each other at intervals. As a result, the arrangement relationship between the signal line located at the center and the ground line surrounding it concentrically does not cause a loss of reflection, attenuation, resonance, radiation, etc. without abruptly changing the transmission mode. In addition, while maintaining good transmission characteristics of the high-frequency signal, it can be converted into an arrangement relationship between the signal line and the ground line arranged in parallel on the same plane.

  Furthermore, the signal terminal 51 includes a signal connecting portion 55 that connects the signal tail portion 53 and the signal contact portion 52, and the ground terminal 71 includes a ground connecting portion 75 that connects the ground tail portion 74 and the ground contact portion 72, The distance between the signal tail portion 53 and the ground tail portion 74 is equal to the distance between the signal connection portion 55 and the ground connection portion 75 and the distance between the signal contact portion 52 and the ground contact portion 72. As a result, the distance between the signal line and the ground line is kept constant, so that the transmission mode of the transmission line does not change abruptly, no loss of reflection, attenuation, resonance, radiation, etc. occurs, and high frequency Signal transmission characteristics are improved.

  Further, the outer diameter of the cylindrical portion 50 a and the semicylindrical portion 50 b and the width of the tongue-like portion 50 c are substantially equal to the outer diameter of the cable 91. As a result, the pair of counterpart terminals 161 that contact the signal contact portion 52 and the ground contact portion 72 can also be disposed so as to be within a predetermined width. Therefore, the dimensions of the cable connector 1 and the board connector 101 in the width direction. A large number of cables 91 can be connected to the other board 191 without increasing the number of cables 91.

  Further, the thickness of the tongue-like portion 50 c is equal to or less than the radius of the cable 91. Thereby, since the protrusion amount from the main-body part 162 of the contact arm part 163 in the other party terminal 161 can be set so that it may be settled in the height of the terminal unit 50, the thickness direction of the cable connector 1 and the board | substrate connector 101 is sufficient. A large number of cables 91 can be connected to the mating board 191 without increasing the size.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a perspective view which shows the state before the fitting of the cable connector in embodiment of this invention. It is sectional drawing which shows the state which fitted the cable connector in embodiment of this invention to the board | substrate connector. It is a perspective view which shows the positional relationship of the terminal unit and counterpart terminal in embodiment of this invention. It is a four-view figure and sectional view showing composition of a terminal unit in an embodiment of the present invention, (a) is a top view, (b) is a front view, (c) is a rear view, (d) is a side view, e) is a cross-sectional view taken along the line ZZ of (a), (f) is a cross-sectional view taken along the line Y-Y of (a), and (g) is a cross-sectional view taken along the line XX of (a). It is the perspective view and exploded view which show the structure of the terminal unit in embodiment of this invention, (a) is a perspective view, (b) is the exploded view which removed the ground terminal, (c) is the exploded view of a relay board, (D) is a perspective view of a relay board. It is a figure which shows the shield terminal of the conventional coaxial multipolar connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable connector 11 1st housing 11a Latching opening 12 Top plate part 13 Terminal accommodation opening part 14 Side board part 17 Terminal support member 31 Relay board 32 Tongue part 32a Boundary convex part 32b Ground contact part accommodation recessed part 32c Signal contact part accommodation recessed part 33 Central portion 33a Tail receiving recess 33b Bridge 34 Cable receiving portion 34a Cover receiving recess 35 Positioning projection 35a Groove 36 Latching projection 37, 52c, 72c Tip portion 37a Inclined surface 37b, 37c Recess 50 Terminal unit 50a Cylindrical portion 50b Semi-cylindrical 50c Tongue 51 Signal terminal 52 Signal contact 52a, 72a Contact surface 52b, 72b, 73b Side surface 53 Signal tail 55 Signal connection 71 Ground terminal 72 Ground contact 73 Ground body 73a, 853 Semi-cylindrical part 73c Latching hole 73d Latching piece 74 Gland Tail part 74a Winding part 74b Connection opening 75 Ground connection part 91 Cable 92 Core wire 93 Inner coating 94 Shield member 95 Outer coating 101 Substrate connector 111 Second housing 113 Counterpart opening 114 Terminal receiving groove 161 Counterpart terminal 162 Body part 163 Contact Arm portion 164 Contact bulge portion 165 Contact leg portion 191 Substrate 851 Shield terminal 852 Cylindrical portion 854 Ground connection portion 855 Pin contact portion 856 Shield contact portion

Claims (7)

(A) a signal terminal (51) connected to the signal line (92) of the coaxial cable (91) and a ground terminal (71) connected to the ground line (94) of the coaxial cable (91); A coaxial connector (1) having a terminal unit (50) for transmitting a high-frequency signal,
(B) The terminal unit (50) includes a cylindrical part (50a), a semi-cylindrical part (50b) disposed in front of the cylindrical part (50a), and the semi-cylindrical part (50b). And a tongue-like portion (50c) disposed in front of the
(C) The signal terminal (51) includes a signal tail portion (53) connected to the signal line (92) in the semi-cylindrical portion (50b), and the counterpart connector ( 101) a signal contact portion (52) in contact with the other party signal terminal (161),
(D) The ground terminal (71) includes a ground tail portion (74) connected to the ground line (94) in the cylindrical portion (50a) and the signal tail portion in the semicylindrical portion (50b). A ground main body portion (73) covering the upper side of (53), and a ground contact portion (72) that contacts the mating ground terminal (161) of the mating connector (101) in the tongue-shaped portion (50c). Features coaxial connector (1). The signal tail portion (53) has a flat plate shape, and the signal contact portion (52) includes a flat contact surface portion (52a) that contacts the counterpart signal terminal (161).
The ground body portion (73) includes a semi-cylindrical portion (73a) that covers the signal tail portion (53), and the ground contact portion (72) is a flat contact surface portion that contacts the mating ground terminal (161). (72a)
The contact surface portion (52a) of the signal contact portion (52) and the contact surface portion (72a) of the ground contact portion (72) are flush with each other and parallel to each other at equal intervals in the axial direction of the terminal unit (50). 2. The coaxial connector (1) according to claim 1, which extends to. The signal terminal (51) includes a signal connecting part (55) for connecting the signal tail part (53) and the signal contact part (52),
The ground terminal (71) includes a ground connecting part (75) for connecting the ground tail part (74) and the ground contact part (72).
The distance between the signal tail part (53) and the ground tail part (74) is the distance between the signal connection part (55) and the ground connection part (75), and the signal contact part (52) and the ground contact part ( 72. The coaxial connector (1) according to claim 1 or 2, wherein the coaxial connector (1) is equal in distance to 72). The outer diameter of the cylindrical portion (50a) and the semicylindrical portion (50b) and the width of the tongue-like portion (50c) are substantially equal to the outer diameter of the coaxial cable (91). The coaxial connector (1) according to item. The coaxial connector (1) according to any one of claims 1 to 4, wherein a thickness of the tongue (50c) is equal to or less than a radius of the coaxial cable (91). (A) a signal terminal (51) connected to the signal line (92) of the coaxial cable (91) and a ground terminal (71) connected to the ground line (94) of the coaxial cable (91); A terminal unit (50) for transmitting a high-frequency signal;
(B) A coaxial multipolar connector (1) having a terminal support member (17) for supporting the terminal unit (50) and having a housing (11) fitted to a counterpart housing (111) of the counterpart connector (101). Because
(C) The terminal unit (50) includes a cylindrical portion (50a), a semi-cylindrical portion (50b) disposed in front of the cylindrical portion (50a), and the semi-cylindrical portion (50b). And a tongue-like portion (50c) disposed in front of the
(D) The signal terminal (51) includes a signal tail part (53) connected to the signal line (92) in the semi-cylindrical part (50b), and the counterpart connector ( 101) a signal contact portion (52) in contact with the other party signal terminal (161),
(E) The ground terminal (71) includes a ground tail portion (74) connected to the ground line (94) in the cylindrical portion (50a) and the signal tail portion in the semicylindrical portion (50b). A ground main body portion (73) covering the upper side of (53), and a ground contact portion (72) that contacts the mating ground terminal (161) of the mating connector (101) in the tongue-shaped portion (50c). A featured coaxial multipolar connector. The coaxial multipolar connector according to claim 6, wherein the open sides of the semi-cylindrical portions (50b) are arranged to face each other.

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