JP5054492B2 - Multipole coaxial connector - Google Patents

Description

  The present invention relates to a multipolar coaxial connector.

  Conventionally, a connector as shown in, for example, Patent Document 1 is provided as a multipolar coaxial connector (see, for example, Patent Document 1).

  The multi-pole coaxial connector shown in the above-mentioned patent document is composed of a male terminal member on the receptacle side, a round bar-shaped male terminal, an insulator covering the male terminal, and a cylindrical receptacle shell surrounding the insulator. In addition, the female terminal member on the plug side includes a female terminal into which the male terminal is inserted and connected, an insulator that covers the female terminal, and a cylindrical plug that covers the insulator and is fitted and connected to the receptacle shell Since it is composed of shells, it is necessary to increase the arrangement pitch of the male terminal members and the female terminal members so that adjacent receptacle shells or adjacent plug shells do not interfere with each other.

  By the way, with the miniaturization of electronic equipment using such a multipolar coaxial connector, there is a demand for narrowing and thinning of the coaxial connector, and the applicant of the present application is as shown in FIGS. A small multipolar coaxial connector has been proposed (see Japanese Patent Application No. 2007-114794).

  This multipolar coaxial connector includes a plug 50 to which a plurality of coaxial cables 100 are connected, and a receptacle 60 that is mounted on a mounting board (not shown) and to which the plug 50 is detachably connected. .

  The plug 50 includes a horizontally long resin housing 51 having a horizontally long fitting hole 52 on the front surface in the insertion direction. The housing 51 is formed by punching and bending a sheet metal, and is coaxial. The signal post 54 that is electrically connected to the central conductor 101 of the cable 100, the resin molding portion 55 in which the signal post 54 is insert-molded, and the sheet metal are subjected to punching and bending processes. A plurality of coaxial cable blocks 53 that are electrically connected to the outer peripheral conductor 102 and provided with a GND post 56 that is caulked and fixed to the resin molding portion 55 are arranged side by side in the longitudinal direction.

  The resin molding portion 55 is provided with a prismatic columnar portion 55 a at a portion to be inserted into the fitting hole 52 of the housing 51. One of the upper and lower side surfaces of the columnar portion 55a is provided with a strip-like terminal plate portion 54a provided at the tip of the signal post 54, and the other is provided with a strip-like shape provided at the tip of the GND post 56. Terminal plate portion 56a is disposed.

On the other hand, the receptacle 60 includes a resin body 61 whose front side portion is inserted into the fitting hole 52 of the plug 50, and each cable block 53 held by the plug 50 is disposed on the front surface in the insertion direction of the body 61. The fitting holes 62 into which the columnar portions 55a are respectively inserted are opened. The rear end of each fitting hole 62 is open to the rear surface of the body 61, and inside each fitting hole 62 is a signal contact 63 electrically connected to the signal post 54 of the plug 50, and a GND. A GND contact 64 electrically connected to the post 56 is press-fitted and fixed from the rear opening of the fitting hole 62. Elastic contact springs 63a, 64a are provided on the tip ends of the contacts 63, 64, and are arranged on the upper and lower sides inside the fitting hole 62, respectively, and the terminal plate parts 54a, 54a arranged on the upper and lower sides of the columnar part 55a, Elastic contact with 56a is made from the outside in the vertical direction. At the tip of each elastic contact spring part 63a, 64a, a bent part that curves outward is provided so that the columnar part 55a can be inserted smoothly, and the terminal plate part 54a is provided on both upper and lower surfaces of the body 61. , 56a is formed so as to allow the bent portions at the tips of the elastic contact springs 63a and 64a to interfere with the inner surface of the body 61 when the elastic contact springs 63a and 64a are expanded. It is.
JP 2004-253178 A

  In the coaxial connector configured as described above, the signal contact 63 and the GND contact 64 of the receptacle 60 are elastically contacted from the outside in the vertical direction with respect to the signal post 54 and the GND post 56 of the plug 50, respectively. In some cases, the elastic contact springs 63 a and 64 a of the signal contact 63 and the GND contact 64 expand outward, and the bent portion at the tip is inserted into the escape hole 61 a of the housing 61.

  In the high-matching coaxial connector, it is preferable to cover the outer periphery with a metal shell in order to improve signal quality. However, the bent portions of the elastic contact spring portions 63a and 64a are inserted into the relief holes 61a of the housing 61 during insertion connection. Therefore, if the outer periphery of the housing 61 is directly covered with a metal shell, the elastic spring portions 63a and 64a may come into contact with the metal shell. Therefore, in the coaxial connector shown in FIGS. 13 to 15, cover portions 57 and 57 for covering the upper and lower side surfaces of the housing 61 are provided integrally with the housing 51 of the plug 50, and the receptacle 60 is formed by these cover portions 57 and 57. When the metal shell is required, the metal shell is disposed further outside the housing 51 of the plug 50, so that there is a problem that the thickness dimension of the coaxial connector is increased.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a multipolar coaxial connector that is further miniaturized.

To achieve the above object, a first aspect of the invention, obtain Preparations a plug plurality of coaxial cables are connected, and a receptacle plug is mounted on the mounting board are connected removably inserted. Plug, a plurality of sets of signal terminals plate which is connected to the resin housing having an oblong fitting hole on the front of the insertion direction, respectively electrically to the central conductor and the outer conductor of the plurality of coaxial cables and obtain Bei the GND terminal plate. Face each other across each pair of signal terminals plate and GND terminal plate fitting hole, and the signal terminal plate and the GND terminal plate is arranged on the opposite side with respect to the fitting hole in adjacent pairs with each other In this way, a plurality of sets of signal terminal boards and GND terminal boards are arranged side by side in the longitudinal direction of the fitting hole , and the coaxial cables are staggered so that the positions of adjacent coaxial cables are shifted as seen from the longitudinal direction. Is arranged. The receptacle is formed to protrude toward the plug side and is inserted into the fitting hole of the housing, and is held by the columnar part, and the signal terminal board and the GND terminal board in each set. And a plurality of sets of signal elastic contact spring pieces and GND elastic contact spring pieces that are elastically contacted from the columnar portion side, and each set of signal elastic contact spring pieces and GND elastic contact spring pieces are for signal use. The position where the elastic contact piece elastically contacts the corresponding signal terminal plate and the position where the GND elastic contact piece elastically contacts the corresponding GND terminal plate are provided so as to be shifted in the plug insertion / extraction direction. Features.

  According to a second aspect of the present invention, in the first aspect of the invention, in the state where the columnar portion of the receptacle is inserted into the fitting hole of the plug, the receptacle is provided with a metal shell that covers the outer surface of the housing along the insertion / extraction direction. The shell is characterized in that a surface facing the mounting substrate is a flat soldering portion soldered to the conductive pattern of the mounting substrate.

According to a third aspect of the present invention, in the first aspect of the present invention, each time at least two sets of the signal terminal plate and the GND terminal plate are juxtaposed in the housing, a plurality of connecting side walls in the short direction of the fitting hole are connected. A reinforcing wall is formed, and a groove into which the reinforcing wall is inserted is formed in the columnar portion.

The invention of claim 4 is characterized in that, in the invention of claim 3 , in the longitudinal direction, the reinforcing wall is formed to be asymmetrical with respect to the center position of the housing in the longitudinal direction.

According to a fifth aspect of the present invention, in the first aspect of the invention, the plurality of sets of the signal elastic spring pieces and the GND elastic spring pieces are press-fitted and fixed to the body of the receptacle, respectively. It is characterized in that a capacitive coupling portion is provided on the GND spring contact spring piece so as to be opposed to each other with a slight gap and to reduce the high frequency impedance between the two spring contact spring pieces.

According to a sixth aspect of the present invention, in the first aspect of the invention, each signal terminal plate is insert-molded in a resin molded product, and a GND terminal plate is caulked and fixed to the resin molded product. The GND terminal plate is provided with a capacitive coupling portion for reducing the high-frequency impedance between the two terminal plates facing the portion of the signal terminal plate to be molded .

According to the first aspect of the present invention, with respect to the signal terminal plate and the GND terminal plate arranged side by side in the fitting holes provided in the housing of the plug, the signal elastic spring piece provided in the columnar portion of the receptacle and Since the GND elastic spring pieces are elastically contacted from the inside, the signal elastic spring pieces and the GND elastic spring pieces are bent inward in a state where the plug and the receptacle are connected. The conventional coaxial spring in which the signal elastic spring piece and the GND elastic spring piece are elastically contacted with the signal terminal plate and the GND terminal plate from the outside, respectively, and both elastic spring pieces are bent outward at the time of connection. In the connector, it is necessary to arrange an insulating member between the metal shell so that the signal elastic spring piece and the GND elastic spring piece deflected to the outside do not come into contact with the metal shell. Although the thickness dimension of the connector increases, according to the present invention, the signal elastic spring piece and the GND elastic spring piece are bent inward at the time of connection, so that the metal shell disposed outside the plug housing There is no need to dispose an insulating member between them, and as a result, the thickness of the coaxial connector can be reduced, and a small coaxial connector can be realized. Also, the position where the signal elastic spring piece elastically contacts the signal terminal board and the position where the GND elastic spring piece elastically contacts the GND terminal board are in the same position in the insertion / extraction direction. There is an effect that the distance between the elastic spring piece and the GND elastic spring piece can be further reduced to further reduce the thickness dimension.

  According to the invention of claim 2, the mounting strength of the receptacle to the mounting board can be increased by soldering the soldering portion of the metal shell to the conductive pattern of the mounting board. Moreover, since the soldering part is formed in a flat plate shape and there is no opening or the like on the surface facing the mounting substrate, flux or the like adheres to the signal elastic spring part for signal or GND for soldering. There is also an effect that the reliability of the electrical connection can be prevented from being lowered.

According to the invention of claim 3 , the number of reinforcing walls can be reduced compared to the case where reinforcing walls are formed between each set of the signal terminal board and the GND terminal board, and the width in the left-right direction is correspondingly reduced. There is an effect that the size can be reduced.

According to the fourth aspect of the present invention, when the plug is rotated 180 degrees from the normal direction, the positions of the reinforcing wall and the groove are not aligned, so that an erroneous connection can be prevented.

According to the invention of claim 5 , by providing the capacitive coupling portion, the high frequency impedance between the signal elastic spring piece and the GND elastic spring piece is reduced, and the impedance can be adjusted to a desired impedance.

According to the invention of claim 6 , by providing the capacitive coupling portion, the high frequency impedance between the signal terminal plate and the GND terminal plate can be reduced and adjusted to a desired impedance.

  Embodiments of a coaxial connector according to the present invention will be described below with reference to FIGS. In the following description, unless otherwise specified, the vertical direction is defined in the direction shown in FIG. 7A, and the direction perpendicular to the paper surface of FIG.

  The coaxial connector of the present embodiment is a multipolar connector, and is mounted on a plug 10 to which a plurality of coaxial cables 100 are connected and a mounting board (not shown), so that the plug 10 is detachably connected. And receptacle 30. As shown in FIG. 4, the coaxial cable 100 includes a center conductor 101, a columnar insulator 103 covering the center conductor 101, an outer conductor 102 disposed on the outer periphery of the insulator 103, and an outer conductor 102. The outer cover 104 is made of an insulating synthetic resin.

  As shown in FIGS. 1 and 2, the plug 10 includes a housing 11 and a multi-pole coaxial cable block 20 held by the housing 11 as main components.

  The housing 11 is made of a flat, rectangular parallelepiped resin molded product, and a plurality of square hole fitting holes 12 are arranged in the left-right direction on the front surface of the housing 11. A plurality of mounting holes 13 into which the coaxial cable blocks 20 of the respective poles are inserted and held from the rear are opened in the left-right direction on the rear surface of the housing 11 (see FIGS. 7 and 9). A plurality (two or three in this embodiment) of mounting holes 13 communicate with each fitting hole 12, and a plurality of (two or three in this embodiment) coaxial cable blocks 20 are connected. On the other hand, one fitting hole 12 is provided. That is, two or three coaxial cable blocks 20 are disposed inside each fitting hole 12. Further, at the left and right side portions of the housing 11, the base portion of the lock piece 41 having the engagement claw 41 a at the tip is fixed by caulking.

  As shown in FIGS. 4A and 5, each coaxial cable block 20 includes a coaxial cable 100 and a signal post 21 (signal terminal plate) that is electrically connected to the central conductor 101 of the coaxial cable 100. The signal post 21 is insert-molded with the resin molded portion 22 and the outer peripheral conductor 102 of each coaxial cable 100 and is connected to the resin molded portion 22 by a GND post 23 (GND). Terminal board) as a main component.

  The signal post 21 is formed by punching and bending the hoop material 201 as shown in FIGS. 11A and 11B, and a resin molding portion 22 is insert-molded at the center of the signal post 21. Are integrally provided. The resin molding portion 22 has a rectangular column shape elongated in the front-rear direction (insertion / removal direction), and one end side of the signal post 21 is exposed from the front surface of the resin molding portion 22, and this exposed portion is a terminal that elastically contacts a signal contact 34 described later. It becomes the board part 21a. The other end side of the signal post 21 exposed from the rear surface of the resin molding portion 22 is substantially strip-shaped, and becomes a soldering terminal 21b to which the central conductor 101 of the coaxial cable 100 is soldered. On one surface, a V notch 21c is formed at a portion where the central conductor 101 is soldered.

  Similarly to the signal post 21, the GND post 23 is formed by punching and bending the hoop material, and is disposed so as to face the terminal plate portion 21 a of the signal post 21, and a GND contact 35 described later. Are elastically contacted with the terminal plate portion 23a, a pair of caulking pieces 23b and 23b formed to protrude upward from the left and right side edges on the rear side of the terminal plate portion 23a, and the rear end edge of the terminal plate portion 23a. A soldering terminal 23c extending downward and extending substantially parallel to the terminal plate 23a from its rear edge, and extending in a direction perpendicular to the soldering terminal 23c from one side edge of the base of the soldering terminal 23c And a sandwiching piece 23e that is integrally connected to the soldering terminal 23c through the connecting piece 23d and that has a tip portion disposed opposite to the soldering terminal 23c. The soldering terminal 23c and the sandwiching piece 23e are disposed to face each other with an interval slightly smaller than the outer diameter of the outer peripheral conductor 102 of the coaxial cable 100, and the coaxial cable is disposed between the soldering terminal 23c and the sandwiching piece 23e. 100 outer peripheral conductors 102 are elastically sandwiched. Bending portions 23f and 23f bent in a direction approaching each other are provided on one side edges of the soldering terminal 23c and the holding piece 23e, and the outer peripheral conductor of the coaxial cable 100 is provided between the soldering terminal 23c and the holding piece 23e. When the bent portion 102f is sandwiched, the bent portions 23f and 23f abut against the peripheral surface of the outer conductor 102 so that the coaxial cable 100 can be prevented from coming off.

  Next, the receptacle 30 will be described. As shown in FIGS. 1 and 3, the receptacle 30 includes a body 31 made of a resin molded product, a plurality of sets of signal contacts 34 (signal elastic spring pieces) and GND contacts 35 ( A grounding spring piece for GND) and a metal shell 36 covering the outer periphery of the body 31 are provided as main components.

  The body 31 has a horizontally long rectangular parallelepiped shape, and a columnar portion 32 is formed on the front surface thereof so as to protrude toward the plug 10 and is inserted into the fitting hole 12 of the housing 11. On the rear surface of the body 31, as shown in FIGS. 7 and 10, press-fitting holes 33 into which the signal contacts 34 and the GND contacts 35 are press-fitted from the rear are opened in two rows. In addition, a plurality of engaging projections 39 are provided on the rear edge of the upper and lower side surfaces of the body 31 at the center and both left and right sides, and the left and right sides of each projection 31b are locked on the upper surface of the body 31. A plurality of claws 40 are provided.

  As shown in FIGS. 4B and 4C, the signal contact 34 and the GND contact 35 are respectively press-fitted pieces 34a and 35a that are press-fitted into the press-fitting holes 33 of the body 31, and the press-fitted pieces 34a, Elastic contact spring portions 34b, 35b formed to extend forward from the front edge of 35a, and solder terminals 34c, 35c having a substantially L shape in side view extending downward from the rear edges of the press-fitting pieces 34a, 35a; Is integrated. Here, openings 37 and 37 are formed on both the upper and lower side surfaces of the columnar portion 32 to expose the elastic contact portions 34b and 35b of the signal contact 34 and the GND contact 35 that are press-fitted and fixed to the body 31. 4 (see FIG. 4 and FIG. 7), the elastic contact spring portions 34b and 35b are elastically contacted with the corresponding terminal plate portions 21a and 23a from the inside through the openings 37 and 37. Since one columnar portion 32 is provided for a plurality of sets (two or three sets in this embodiment) of contacts 34 and 35, each pair of contacts is provided on both upper and lower side surfaces of the columnar portion 32. A plurality of openings 37 exposing the spring contact portions 34b and 35b of 34 and 35 are opened (see FIG. 3).

  As shown in FIG. 6, the metal shell 36 bends the left and right side portions of the belt-shaped sheet metal in one direction, folds the tip side further inward, and butts the concavo-convex portion provided in the butt portion 36a. By laser welding the portion 36a, a flat rectangular parallelepiped shape having an open front surface and a rear surface is formed. On the lower surface of this metal shell 36 (ie, the surface facing the mounting substrate), at least the position where the plug 10 is inserted is a flat soldering portion 36e in which no through hole is formed. Solder terminals 36b for soldering to the ground pattern of the mounting substrate are formed at the edge by cutting and raising a part of the side wall. A recess 36 c is formed in a portion corresponding to the engagement protrusion 39 of the body 31 on the rear edge of both the upper and lower sides of the metal shell 36, and the locking claw 40 of the body 31 is formed on the upper surface of the metal shell 36. A locking hole 36d for locking the locking claw 40 is provided at a corresponding position. In addition, lock holes 42 are formed in the left and right side walls of the metal shell 36 to engage the engagement claws 41a of the lock piece 41 described above.

  Next, the assembly procedure of the coaxial connector of this embodiment will be described. First, assembly of the coaxial cable block 20 and the plug 10 will be described. As shown in FIGS. 11A and 11B, the signal post 21 and the GND post 23 are formed by punching and bending the hoop materials 201 and 211, respectively, so that the transport holes 203 and 213 are equal. It is formed in a state where it is connected to feed parts 202 and 212 provided at intervals via connecting parts 204 and 214. After the hoop material 201 is processed and the signal post 21 is formed, the signal post 21 is separated from the hoop material 201 after the resin molding portion 22 is simultaneously formed on the signal post 21 by insert molding. Then, the resin molding portion 22 insert-molded on the signal post 21 is inserted between the two left and right caulking pieces 23b, 23b of the GND post 23 connected to the hoop material 211 via the connecting portion 214. The resin-molded portion 22 is held by the GND post 23 by bending the tip portions of the caulking pieces 23b and 23b inward. At this time, positioning protrusions 22a formed to protrude from the upper surface of the resin molding portion 22 are sandwiched between the two caulking pieces 23b and 23b provided on the left and right side edges of the terminal plate portion 23a at intervals in the front-rear direction. Thus, the resin molding portion 22 and the signal post 21 are positioned in the front-rear direction. The outer peripheral conductor 102 of the coaxial cable 100 is sandwiched between the soldering terminal 23c of the GND post 23 and the sandwiching piece 23e, and the central conductor 101 of the coaxial cable 100 is provided on the soldering terminal 21b of the signal post 21. With the center conductor 101 being soldered to the soldering terminal 21b and the outer peripheral conductor 102 being soldered to the soldering terminal 23c and the sandwiching piece 23e, respectively, the coaxial cable 100 is connected to the signal post 21 and the V-notch 21c. Electrical connection to the GND post 23 completes the assembly of the coaxial cable block 20.

  Thereafter, when the coaxial cable block 20 is inserted into the mounting hole 13 opened on the rear surface of the housing 11 with the terminal plate portions 21a and 23a facing forward and pushed into a predetermined mounting position, the outer surface of the resin molding portion 22 is inserted. Is in contact with the inner wall of the mounting hole 13 so that the resin molding portion 22 is positioned in the vertical and horizontal directions, and the front ends of the signal post 21 and the GND post 23 are in contact with the inner wall of the housing 11 and beyond. The forward movement is restricted, and a locking piece 23g formed by cutting and raising a part of the GND post 23 is locked in the locking hole 14 provided in the housing 11, whereby the coaxial cable block 20 The disconnection is prevented and the housing 11 is fixed.

  As shown in FIG. 9, the coaxial cable blocks 20 having multiple poles are alternately arranged so that the adjacent coaxial cable blocks 20 are turned upside down and the coaxial cables 100 connected to the adjacent coaxial cable blocks 20 are displaced in the vertical direction. Therefore, the arrangement pitch P of the coaxial cable blocks 20 can be narrowed compared to the case where the coaxial cable blocks 20 are arranged so that the plurality of coaxial cables 100 are arranged at the same height (narrow pitch). The width dimension of the coaxial connector can be reduced.

  Further, each time at least two sets of signal posts 21 and GND posts 23 are juxtaposed on the housing 11, a reinforcing wall 15 that connects both side walls (upper side wall and lower side wall) of the fitting hole 12 in the short direction is formed. In addition, a groove 32a into which the reinforcing wall 15 is inserted is formed in the columnar portion 32. In the case of a multipolar coaxial connector, when the longitudinal dimension of the fitting hole 12 is increased, the strength of the upper and lower walls of the housing 11 may be reduced. Since the plurality of reinforcing walls 15 connecting the side walls are formed integrally with the housing 11, the strength of the housing 11 can be sufficiently secured even in the case of a multipolar coaxial connector. In addition, the number of reinforcing walls 15 can be reduced compared to the case where the reinforcing walls 15 are formed between the pairs of signal posts 21 and GND posts 23, and the width dimension in the left-right direction can be reduced accordingly. effective.

  Furthermore, in this embodiment, the columnar portion 32 located at the right end in FIG. 3A is formed wider than the other columnar portions 32, and three sets of contacts 34 and 35 are arranged on the wider columnar portion 32. Two sets of contacts 34 and 35 are disposed in the columnar portion 32 of the first and second fitting holes 12 corresponding to the wide columnar portion 32 (the fitting hole 12 at the left end in FIG. 2A) is replaced with another fitting hole. It is formed wider than 12. Therefore, the formation position of the reinforcing wall 15 formed between the adjacent fitting holes 12 is asymmetrical with respect to the center position of the housing 11 in the longitudinal direction, and the direction of the plug 10 is rotated 180 degrees from the normal direction. Since the positions of the reinforcing wall 15 and the groove 32a are not aligned, erroneous connection can be prevented.

  Next, assembly of the receptacle 30 will be described. First, when the body 31 is inserted from the rear side of the metal shell 36 in the vertical and horizontal directions and the body 31 is moved to a predetermined position, the front edges of the engaging protrusions 39 provided on the upper and lower side surfaces of the body 31 are the metal shell. The body 31 is in contact with the recesses 36c on both the upper and lower surfaces of the body 36 to restrict further forward movement of the body 31, and the outer peripheral surface of the body 31 is in contact with the inner surface of the metal shell 36. 36, and the locking claw 40 of the body 31 is locked in the locking hole 36d of the metal shell 36, thereby preventing the body 31 from coming off. Next, the signal contact 34 and the GND contact 35 are respectively inserted into the plurality of press-fitting holes 33 opened in two upper and lower rows on the rear surface of the body 31 from the rear with the elastic contact portions 34b and 35b facing the front side. By press-fitting the press-fitting pieces 34 a and 35 a of the respective contacts 34 and 35 into the press-fitting hole 33, a plurality of sets of contacts 34 and 35 are fixed to the body 31, and the assembly of the receptacle 30 is completed. Here, each pair of contacts 34 and 35 is attached to the body 31 so that the elastic spring portions 34b and 35b face each other in the vertical direction, and is adjacent to each other as shown in FIGS. 7 (a) and 7 (b). The pairs of contacts 34 and 35 are alternately arranged so that the positions of the signal contacts 34 and the GND contacts 35 are staggered.

  The receptacle 30 assembled as described above is mounted on a mounting board (not shown), and a plurality of signal contacts 34 and soldering terminals 34c of the GND contact 35 are used as wiring patterns of the mounting board, and a metal shell. The receptacle 30 is fixed to the mounting board by soldering the 36 soldering terminals 36b and the soldering portion 36e to the ground pattern of the mounting board. In the conventional coaxial connector shown in FIGS. 13 to 15, when the outside of the housing 61 is directly covered with a metal shell, the elastic contact spring portions 63 a and 64 a of the signal contact 63 and the GND contact 64 that are expanded are used as the metal shell. It is necessary to form a relief hole in the metal shell so as not to contact and short-circuit, and if a relief hole is formed on the surface of the metal shell that faces the mounting board, it will be removed from the relief hole when this opposing surface is soldered. Since the solder flux that has entered may adhere to the signal contact 34 or the GND contact 35 and the reliability of the electrical connection may decrease, the opposing surface of the metal shell is soldered to the ground pattern of the mounting board. I couldn't. Therefore, in the conventional coaxial connector, the receptacle 60 is solder-connected to the mounting board only by the soldering terminals of the signal contact 63 and the GND contact 64, and when an external force is applied to the receptacle 60 by inserting or removing the plug 50, the signal There is a possibility that the soldering terminals of the contact 63 for GND and the contact 64 for GND are detached from the mounting substrate. On the other hand, in this embodiment, the opposing surface of the metal shell 36 facing the mounting board is a flat soldering part 36e in which no through hole is formed, and the entire soldering part 36e is soldered to the mounting board. Therefore, the attachment strength of the receptacle 30 to the mounting board is increased, and the signal contact 34 and the GND contact 35 can be prevented from coming off.

  Then, when the plug 10 is inserted into the front opening of the receptacle 30 fixed to the mounting substrate with the vertical and horizontal orientations aligned, the columnar portion 32 on the front surface 0 of the receptacle 30 is inserted into the fitting hole 12 on the front surface of the plug 10. The signal contact 34 exposed on the upper and lower surfaces of the columnar portion 32 and the elastic contact spring portions 34b and 35b of the GND contact 35 are for the signal posts 21 and GND disposed on the upper and lower side surfaces inside the fitting hole 12, respectively. The signal contact 34 and the GND contact 35 are electrically connected to the central conductor 101 and the outer peripheral conductor 102 of the coaxial cable 100 by elastically contacting the terminal plate portions 21a and 23a of the post 23 from the inside, respectively. When the plug 10 is connected to the receptacle 30, the engagement claw 41 a at the tip of the lock piece 41 engages with the lock hole 42 of the metal shell 36, thereby preventing the plug 10 from coming off. .

  On the other hand, when the plug 10 is removed from the receptacle 30, the left and right lock pieces 41 are bent inward to release the engagement state between the engagement claws 41a and the lock holes 42, and then the plug 10 is pulled backward. The plug 10 can be easily pulled out from the receptacle 30.

  The coaxial connector of the present embodiment has the above-described configuration, and the signal post 21 and the terminal plate portion 21a of the GND post 23 arranged side by side in the fitting hole 12 provided in the housing 11 of the plug 10, Since the signal contact 34 provided on the columnar portion 32 of the receptacle 30 and the elastic contact spring portions 34b and 35b of the GND contact 35 are elastically contacted from the inside with respect to 23a, the plug 10 and the receptacle 30 are connected. Then, both the elastic contact spring portions 34b and 35b are bent inward. Conventional coaxials in which the elastic contact springs of the signal contact and the GND contact are elastically contacted from the outside with respect to the terminal plates of the signal post and the GND post, respectively, and the elastic contact spring is bent outward at the time of connection. In the connector, since it is necessary to arrange a member for insulation between the metal shell so that the elastic spring part bent outward is not in contact with the metal shell, the thickness dimension of the coaxial connector increases. According to the coaxial connector of the present invention, the elastic spring portions 34b and 35b are bent inward at the time of connection, and therefore it is necessary to dispose an insulating member between the metal shell 36 disposed outside the housing 11 of the plug 10. As a result, the thickness dimension of the coaxial connector can be reduced, and a small coaxial connector can be realized.

  Further, in the present embodiment, as shown in FIG. 8, the position where the elastic contact spring portion 34 b of the signal contact 34 elastically contacts the terminal plate portion 21 a of the signal post 21 and the GND plate on the terminal plate portion 23 a of the GND post 23. Since the position of the elastic contact spring portion 35b of the contact 35 is shifted in the insertion / extraction direction, the position of the elastic contact spring portion 34b elastically contacting the terminal plate portion 21a and the position of the terminal plate portion 23a as shown in FIG. Compared with the case where the contact spring portion 35b is in elastic contact with the same position in the insertion / removal direction, the distance between the signal contact 34 and the GND contact 35 in the vertical direction is reduced to further reduce the thickness dimension. Can do.

  Further, in the coaxial connector of the present embodiment, the elastic contact portions 34b and 34b of the signal contact 34 and the GND contact 35 provided on the plug 10 are the terminal plates of the signal post 21 and the GND post 23 provided on the receptacle 30. Since the elastic contact portion is elastically contacted with the portions 21a and 23a from the inside, the interval between the press-fit pieces 34a and 35b of the contacts 34 and 35 can be made narrower than the case where the elastic contact spring portion is elastically contacted with the terminal plate portion from the outside. The high frequency impedance between 34a and 35b can be reduced. Further, if the thickness dimension of the housing 31 is the same, the distance between the press-fitting pieces 34a and 35b of the contacts 34 and 35 is narrowed to increase the distance from the bottom face of the housing 31 to the lower press-fitting piece 34a or 35b. As a result, the capacitive coupling portions 34d and 35d which are formed wider than the soldering portions at the hanging portions of the L-shaped soldering pieces 34c and 35c and are opposed to each other with a slight gap in the front-rear direction. It became possible to provide (refer FIG. 10). As described above, the capacitive coupling portions 34d and 35d provided on the respective contacts 34 and 35 are arranged to face each other with a slight space therebetween, and the press-fit portions 34a and 35a are also arranged to face each other with the columnar portion 32 therebetween. The high frequency impedance between the contacts 34 and 35 can be reduced and adjusted to a desired impedance.

In the coaxial connector of this embodiment, as shown in FIGS. 5A and 5B, the coaxial cable block 20 is opposed to the embedded portion 21d of the signal post 21 that is insert-molded in the resin molding portion 22. The side wall 23h is erected from one side edge of the terminal plate portion 23a of the GND post 23, and the side wall 23h of the GND post, the caulking pieces 23b, 23b, and the bases of the caulking pieces 23b, 23b are connected to each other. Since the piece 23j is disposed opposite to the embedded portion 21d of the signal post 21 through a minute gap, the high frequency impedance between the posts 21 and 23 can be reduced and adjusted to a desired impedance. .
By the way, it is also preferable that the position where the signal elastic spring piece elastically contacts the signal terminal plate and the position where the GND elastic spring piece elastically contacts the GND terminal plate are shifted in the insertion / extraction direction. . As a result, the position where the signal elastic spring piece elastically contacts the signal terminal board and the position where the GND elastic spring piece elastically contacts the GND terminal board are the same as in the insertion / extraction direction. There is an effect that the distance between the elastic contact spring piece for GND and the elastic spring piece for GND can be further reduced to further reduce the thickness dimension.

It is an external appearance perspective view which fractures | ruptures partially explaining the state before the connection of the coaxial connector of this embodiment. (A) (b) is an external appearance perspective view of the plug used for the same. (A) (b) is an external appearance perspective view of the receptacle used for the same as the above. (A) is explanatory drawing of the coaxial cable block and receptacle used for the above, (b) (c) is a perspective view of the signal contact and the GND contact used for the above. (A) is a perspective view of the signal post and the GND post used in the above, and (b) is an enlarged view of the A part. It is a perspective view of the metal shell used for the same as the above. (A) (b) is a sectional side view which shows the connection state same as the above. It is a perspective view which fractures | ruptures partially the receptacle used for the same as the above. It is a rear view of the plug used for the same as the above. It is the perspective view which expanded the principal part of the receptacle used for the same as the above. (A) (b) is explanatory drawing explaining the manufacturing process of the coaxial cable block used for the same as the above. It is principal part sectional drawing which shows the other form same as the above. It is an external appearance perspective view which demonstrates the state before the connection of the conventional coaxial connector, and is partially broken. (A) is explanatory drawing of the coaxial cable block and receptacle used for the same as the above, (b) is a perspective view of a signal contact and a GND contact. It is sectional drawing which shows a connection state same as the above.

Explanation of symbols

10 Plug 11 Housing 12 Fitting hole 21 Signal post 21a Terminal board (signal terminal board)
23 GND post 23a Terminal board (GND terminal board)
30 Receptacle 32 Column-shaped part 34 Signal contact 34b Elastic contact spring part (Signal elastic contact piece)
35 GND contact 35b Elastic spring portion (GND elastic spring piece)
100 Coaxial cable 101 Center conductor 102 Outer conductor

Claims (6)

A plug in which a plurality of coaxial cables are connected, and a receptacle that is mounted on a mounting board and connected to the plug so as to be freely inserted and removed;
The plug includes a resin housing having a horizontally long fitting hole on the front surface in the insertion direction, and a plurality of sets of signal terminal plates that are electrically connected to the central conductor and the outer peripheral conductor of the plurality of coaxial cables, respectively. And a terminal board for GND,
The signal terminal board and the GND terminal board of each set face each other across the fitting hole, and the signal terminal board and the GND terminal board are adjacent to the fitting hole in adjacent groups. said coaxial with the so that disposed opposite a plurality of sets of said signal terminal plate and the GND terminal plate is arranged in the longitudinal direction of the fitting hole, and, adjacent when viewed from the longitudinal Te The coaxial cables are alternately arranged so that the positions of the cables are shifted,
The receptacles are formed in a protruding manner toward the plug side and inserted into the fitting holes of the housing, and are held in the columnar parts, respectively, and the signal terminal plates and the sets of the respective sets A plurality of sets of signal elastic contact spring pieces and GND elastic contact spring pieces that are in elastic contact with the GND terminal plate from the columnar part side,
The signal elastic contact spring piece and the GND elastic spring piece of each set correspond to the position where the signal elastic spring piece elastically contacts the corresponding signal terminal plate and the GND elastic spring piece. A multipolar coaxial connector, characterized in that a position where it makes an elastic contact with the GND terminal plate is shifted in the plug insertion / removal direction.   In the state where the columnar portion of the receptacle is inserted into the fitting hole of the plug, the receptacle is provided with a metal shell covering the outer surface of the housing along the insertion / extraction direction, and the metal shell is connected to the mounting substrate. 2. The multipolar coaxial connector according to claim 1, wherein the opposing surface is a flat soldering portion soldered to the conductive pattern of the mounting substrate.   In the housing, each time at least two sets of the signal terminal plate and the GND terminal plate are juxtaposed, a plurality of reinforcing walls that connect both side walls in the short direction of the fitting hole are formed, and the columnar portion The multipolar coaxial connector according to claim 1, wherein a groove into which the reinforcing wall is inserted is formed.   4. The multipolar coaxial connector according to claim 3, wherein, in the longitudinal direction, a position where the reinforcing wall is formed is asymmetrical with respect to a center position of the housing in the longitudinal direction.   A plurality of sets of the signal elastic contact spring pieces and the GND elastic contact spring pieces are press-fitted and fixed to the body of the receptacle, respectively, and the signal elastic contact spring pieces and the GND elastic spring pieces of each set are slightly 2. The multipolar coaxial connector according to claim 1, further comprising a capacitive coupling portion arranged to face each other with a small space between them to reduce high-frequency impedance between both elastic contact spring pieces. Each of the signal terminal plates is insert-molded in a resin molded product, the GND terminal plate is caulked and fixed to the resin molded product, and the signal terminal plate is insert-molded in the resin molded product. 2. The multipolar coaxial connector according to claim 1, wherein a capacitive coupling portion for reducing a high-frequency impedance between the two terminal plates is provided on the GND terminal plate .

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