WO2020162373A1

WO2020162373A1 - Connector

Info

Publication number: WO2020162373A1
Application number: PCT/JP2020/003804
Authority: WO
Inventors: 弘樹中村; 貴司舛永
Original assignee: 第一精工株式会社
Priority date: 2019-02-04
Filing date: 2020-01-31
Publication date: 2020-08-13
Also published as: CN113412558B; CN113412558A; JP7298628B2; TW202034596A; JPWO2020162373A1; TWI827795B

Abstract

In a plug connector 3, a signal contact conductor 40 includes a contact part 41 that contacts a signal contact conductor 20 of a mating connector, a connection part 42 to which a signal line SC1 of a coaxial cable SC is connected, and an intermediate part 43 located between the contact part 41 and the connection part 42. The area and/or the distance of the intermediate part 43 may vary in accordance with a position between the contact part 41 and the connection part 42, such that characteristic impedance variation, which is between the signal contact conductor 40 and the ground contact conductor 60 and is according to the position between the contact part 41 and the connection part 42, is suppressed.

Description

connector

The present disclosure relates to connectors.

Patent Document 1 discloses a coaxial connector that includes a contact connected to a center conductor of a coaxial cable, a resin body that houses the contact, and a metal shell that covers the body housing the contact.

JP, 2013-157113, A

In recent years, connectors are required to further improve reliability in high-frequency signal transmission. Therefore, the present disclosure provides a connector effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

A connector according to one aspect of the present disclosure is a coaxial cable that includes a signal line and a shield line, a dielectric layer interposed between the signal line and the shield line, and an insulating coating that covers the shield line. A signal contact conductor, which is attached to a terminal portion where the insulating coating is removed and the signal line and the shield line are partially exposed, and which is connected to a mating connector mounted on a wiring board and which is conductive with the signal line. And a ground contact conductor conducting with the shield wire, and an insulative housing interposed between the signal contact conductor and the ground contact conductor, wherein the signal contact conductor is the signal contact conductor of the mating connector. Depending on the position in the direction connecting the contact portion and the connection portion, the contact portion that contacts the contact line, the connection portion to which the signal line is connected, and the intermediate portion that connects the contact portion and the connection portion. In addition, at least one of the area and the distance of the signal contact conductor facing the ground contact conductor is changed so as to suppress the characteristic impedance change between the signal contact conductor and the ground contact conductor.

According to this connector, the change in characteristic impedance from the connecting portion to the contact portion is suppressed by at least one of the area and the distance of the signal contact conductor facing the ground contact conductor. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

The width of the intermediate portion may be changed according to the position in the direction connecting the contact portion and the connection portion. That is, a connector according to one aspect of the present disclosure is a coaxial cable having a signal line and a shield line, a dielectric layer interposed between the signal line and the shield line, and an insulating coat that covers the shield line. Is a connector which is attached to the terminal part where the signal line and the shielded wire are partially exposed and which is connected to the counterpart connector mounted on the wiring board, and which has a signal contact conductor conducting with the signal line, and a shielded wire. The signal contact conductor includes a conductive ground contact conductor and an insulating housing interposed between the signal contact conductor and the ground contact conductor. A characteristic impedance change between a signal contact conductor and a ground contact conductor according to a position in a direction connecting the contact portion and the connection portion, which has a connection portion to be connected and an intermediate portion connecting the contact portion and the connection portion. The width of the intermediate portion is changed according to the position in the direction so as to suppress.

According to this connector, the change in the characteristic impedance from the connection part to the contact part is suppressed by the width of the intermediate part. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

The ground contact conductor is a fitting part that fits into the ground contact conductor of the mating connector, a clamp part that holds the part of the coaxial cable where the insulation coating has been removed, and contacts the shield wire And a barrel portion for holding the housing between the clamp portion and the clamp portion, the contact portion is located in the fitting portion, the connection portion is located in the barrel portion, and between the fitting portion and the barrel portion. There is a gap in the intermediate portion, and the portion of the intermediate portion located in the gap is provided with a widened portion that is wider than both the portion of the intermediate portion located in the fitting portion and the portion of the intermediate portion located in the barrel portion. Good. Between the fitting portion and the barrel portion, the amount of metal on the ground contact conductor side is smaller than that in the barrel portion and the like. Therefore, the characteristic impedance between the signal contact conductor and the ground contact conductor tends to be higher than that in the barrel portion or the like. On the other hand, by providing the widened portion in the intermediate portion, it is possible to prevent the characteristic impedance from increasing in the path from the connection portion to the contact portion.

The width of the connecting portion may be larger than the width of the intermediate portion, and the housing may be configured to form a cavity between the connecting portion and the ground contact conductor. In this case, the workability of connecting the signal line to the connecting portion is improved by increasing the width of the connecting portion. On the other hand, when the width of the connection portion increases, the characteristic impedance in the connection portion decreases. On the other hand, when the housing forms a cavity between the connection portion and the ground contact conductor, the dielectric constant between the connection portion and the ground contact conductor is reduced. Therefore, the characteristic impedance is prevented from being lowered due to the increased width of the connection portion. Therefore, it is possible to achieve both workability of connection of the signal line and suppression of change in characteristic impedance.

The housing may have an opening for ultrasonically connecting the signal line to the connection portion, and at least a part of the cavity may be formed by the opening. In this case, the opening for ultrasonic bonding contributes to both suppression of change in characteristic impedance and improvement in workability of ultrasonic bonding. Therefore, both workability of connection of the signal line and suppression of change in characteristic impedance can be more reliably achieved.

　In the middle part, the distance from the ground contact conductor may change along the direction connecting the contact part and the connection part. In this case, the change in the characteristic impedance from the connecting portion to the contact portion is suppressed by the change in the distance between the intermediate portion and the ground contact conductor. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

▽The middle part may have a convex part whose distance to the ground contact conductor is shorter than the base part of the contact part. In this case, the characteristic impedance change from the connecting portion to the contact portion can be suppressed by using the convex portion, and the stability can be improved.

　The middle part may have a recess whose distance to the ground contact conductor is longer than that of the base of the contact part. In this case, it is possible to suppress the change in the characteristic impedance from the connecting portion to the contact portion by utilizing the recess, and it is possible to improve the stability.

The connection part may have a connection main surface for connecting the signal line, the intermediate part has an intermediate main surface continuous with the connection main surface, and the signal contact conductor has the connection main surface on the intermediate main surface. You may bend in the boundary part of an intermediate part and a connection part so that it may become hollow. In this case, the balance between the distance between the connection portion and the ground contact conductor and the distance between the signal line connected to the connection portion and the ground contact conductor can be adjusted to more reliably suppress the characteristic impedance change.

According to the present disclosure, it is possible to provide a connector that is effective in improving the stability of characteristic impedance in a transmission path of a high frequency signal.

FIG. 1 is a perspective view of a connector assembly according to an embodiment of the present disclosure. 2 is a perspective view of the receptacle connector included in the connector assembly of FIG. FIG. 3 is a cross-sectional view of the receptacle connector of FIG. 2 taken along the line III-III. FIG. 4 is a perspective view of the ground contact conductor included in the receptacle connector. 5A and 5B are views showing a signal contact conductor included in the receptacle connector. FIG. 5A is a perspective view, FIG. 5B is a right side view, and FIG. 5C is a left side view. FIG. 6 is a perspective view of a plug connector included in the connector assembly of FIG. FIG. 7 is a sectional view of the plug connector of FIG. 6 taken along line VII-VII. FIG. 8 is a bottom view of the plug connector of FIG. FIG. 9 is a perspective view of a signal contact conductor included in the plug connector. FIG. 10 is a perspective view of a housing included in the plug connector. 11 is a bottom view of the housing of FIG. FIG. 12 is a view for explaining the fitting state of the connector assembly, which is a cross-sectional view taken along the line XII-XII in FIG. FIG. 13 is a sectional view of a plug connector according to a modification. FIG. 14 is a perspective view of a signal contact conductor included in the plug connector according to the modification. FIG. 15 is a perspective view of a signal contact conductor included in the plug connector according to the modification. FIG. 16 is a perspective view of a signal contact conductor included in the plug connector according to the modification. FIG. 17 is a perspective view of a signal contact conductor included in the plug connector according to the modification. FIG. 18 is a perspective view of a signal contact conductor included in the plug connector according to the modification. FIG. 19 is a perspective view of a signal contact conductor included in the plug connector according to the modification.

The embodiments according to the present disclosure described below will be described, but the present disclosure should not be limited to the following contents. In the following description, the same elements will be denoted by the same reference symbols, without redundant description.

[Outline of connector assembly]
An outline of the connector assembly will be described with reference to FIG. As shown in FIG. 1, the connector assembly 1 includes a receptacle connector 2 and a plug connector 3. The connector assembly 1 is a connector that electrically connects a cable-shaped signal transmission medium to an electric circuit of a wiring board, and is, for example, an RF (Radio Frequency) connector. The signal transmission medium is a medium that transmits signals of various electronic devices such as a mobile phone, and is, for example, a coaxial cable SC. The wiring board is, for example, the printed wiring board PB. That is, the connector assembly 1 of the present embodiment is a coaxial connector that electrically connects the coaxial cable SC to the electric circuit of the printed wiring board PB. In the connector assembly 1, the plug connector 3 attached to the terminal portion of the coaxial cable SC is fitted to the receptacle connector 2 mounted on the printed wiring board PB, whereby the coaxial cable SC and the printed wiring board PB are connected. It is electrically connected to an electric circuit (details will be described later).

In the following description, the axial direction of the coaxial cable SC is the “X direction”, and the mating direction of the receptacle connector 2 and the plug connector 3 when the receptacle connector 2 and the plug connector 3 are mated is the “Z direction”. , The direction orthogonal to the X and Z directions may be described as the “Y direction”. Further, in the Z direction, the plug connector 3 side in the state shown in FIG. 1 may be described as “upper” and the receptacle connector 2 side as “lower”, for example. Further, particularly in the description of the plug connector 3, with respect to the X direction, an end portion of the coaxial cable SC where the plug connector 3 is attached is referred to as a “front end” and an opposite end portion is referred to as a “rear end (base end)”. There is.

[Receptacle connector]
The details of the receptacle connector 2 will be described with reference to FIGS. 2 to 5. As shown in FIGS. 2 and 3, the receptacle connector 2 has a ground contact conductor 10, a signal contact conductor 20, and a housing 30. The receptacle connector 2 is mounted on the printed wiring board PB (see FIG. 1) by, for example, soldering.

(Ground contact conductor)
The ground contact conductor 10 is a member for grounding formed of, for example, a thin plate-shaped metal member. The ground contact conductor 10 is arranged so as to surround a contact portion 21 (details will be described later) of the signal contact conductor 20. As shown in FIG. 4, the ground contact conductor 10 includes a ground main body 11 (main body) formed in a cylindrical shape (cylindrical shape), and one end of the ground main body 11 in the Z direction (see FIG. 4 has an external terminal portion 12 extending outward from the lower end).

The gland body 11 is a cylindrical member and extends along the central axis C in the vertical direction (Z direction). That is, the central axis C direction of the ground main body 11 corresponds to the vertical direction (Z direction). The ground main body 11 is connected to a ground contact conductor (described later) of the plug connector 3 from the other edge (upper end in FIG. 4) in the Z direction. A groove 11a used for fitting with the plug connector 3 is provided on the outer peripheral surface of the gland body 11 along the circumferential direction.

The external terminal portion 12 is a flat plate-shaped member extending in the horizontal direction (XY direction) as shown in FIG. The external terminal portion 12 extends outward from the lower end portion of the ground body portion 11. The external terminal portion 12 is configured to include a pair of

terminal portions

121 and 122 provided so as to face each other in the Y direction with the central axis C of the ground main body portion 11 extending in the vertical direction interposed therebetween. Each of the pair of

terminal portions

121 and 122 projects outward so as to be separated from the central axis C. The

terminal portions

121 and 122 have substantially the same rectangular shape and are connected to the lower end of the ground main body portion 11 so that their longitudinal directions are along the X direction while being separated from each other with the central axis C therebetween. It Therefore, the facing surface 121a of the terminal portion 121 that faces the terminal portion 122 and the facing surface 122a of the terminal portion 122 that faces the terminal portion 121 extend in the X direction below the ground main body portion 11, respectively. .. A space S1 extending along the longitudinal direction (X direction) of the

terminal portions

121 and 122 is formed between the facing surface 121a and the facing surface 122a. The space S1 serves as a housing 30 which will be described later. Filled by members.

The facing surface 121a of the terminal portion 121 extends substantially in the vertical direction (Z direction), and an inclined portion 121b that is inclined with respect to the vertical direction is formed in a part thereof. The inclined portion 121b is inclined so that a part of the facing surface 121a of the terminal portion 121 is cut out to the upper surface 121u side. Similar to the inclined portion 121b, the opposed surface 122a of the terminal portion 122 is also formed with an inclined portion 122b that is inclined with respect to the vertical direction in a part thereof. The inclined portion 122b is inclined so that a part of the facing surface 122a of the terminal portion 122 is cut out toward the upper surface 122u. By providing the

inclined portions

121b and 122b, the adhesion between the ground contact conductor 10 and the housing 30 described later is enhanced. Details will be described later.

The above ground contact conductor 10 can be manufactured, for example, by pressing and bending a thin plate-shaped metal material, but it may be manufactured by a method different from them. Further, the ground contact conductor 10 is soldered to a ground conductive path (not shown) for ground connection formed on the printed wiring board PB (see FIG. 1).

(Signal contact conductor)
The signal contact conductor 20 is a signal transmission conductor formed of, for example, a thin plate-shaped metal member.

As shown in FIG. 5, the signal contact conductor 20 extends outward from a contact portion 21 formed in a cylindrical shape and a lower end which is one end edge of the contact portion 21 in the Z direction. And a conductor portion 22.

The contact portion 21 has a substantially cylindrical shape and extends in the vertical direction (Z direction) along the central axis C. The outer diameter of the contact portion 21 is smaller than the inner diameter of the ground body portion 11 of the ground contact conductor 10. Further, the contact portion 21 has a slit 211 extending along the extending direction of the central axis C (vertical direction: Z direction). The slits 211 extend to both ends of the tubular contact portion 21 in the Z direction. Therefore, the contact portion 21 has a substantially C-shape having the slit 211 in a plan view along a plane orthogonal to the central axis C. The contact portion 21 is connected to a signal contact conductor (described later) of the plug connector 3 from the other end edge (upper end in FIG. 5).

The conductor 22 is formed in a flat plate shape extending in the horizontal direction (XY direction). The conductor portion 22 extends outward from the lower end portion of the contact portion 21, that is, in the direction away from the central axis C. In the example shown in FIG. 5, the conductive wire portion 22 extends in the −X direction with respect to the central axis C such that the X direction is the longitudinal direction. The extending direction of the main surface of the conductor portion 22 is the horizontal direction, but it is not limited to the horizontal direction as long as it is a direction intersecting at least the central axis C.

In the conductor portion 22, a first region 221, a second region 222, and a third region 223 are arranged in this order from the portion near the contact portion 21 along the extending direction (X direction). The first area 221 is an area connected to the contact portion 21. In addition, the third region 223 is a region that includes an end portion of the conductive wire portion 22 that is opposite to the end portion near the contact portion 21. The second area 222 is an area sandwiched between the first area 221 and the third area 223.

The width (length along the Y direction) of the conductive wire portion 22 changes depending on the position in the extending direction of the longitudinal direction. Specifically, the widths of the first region 221, the second region 222, and the third region 223 are different from each other in the adjacent regions. Specifically, the first region 221 and the third region 223 have narrower widths than the second region 222. The first region 221 has two

regions

221a and 221b having different widths in order from the side closer to the contact portion 21. The region 221a is a region narrower in width than the region 221b, and is the smallest narrowest part in the conductor portion 22. In addition, the second region 222 includes the widest maximum portion of the conductive wire portion 22. As shown in FIG. 5A, from the widest maximum portion of the second region 222 toward the contact portion 21, that is, from the maximum portion of the second region 222 to the region 221b of the first region 221. , 221a, the width of the conductor portion 22 is gradually reduced. Further, the width of the conductive wire portion 22 also decreases from the widest maximum portion of the second region 222 toward the third region 223.

The change in width depending on the position in the lengthwise extending direction of the conductor portion 22 makes it possible to suppress a decrease in the characteristic impedance of the receptacle connector 2. In the high frequency range, impedance matching in the connector is required. In the receptacle connector 2, the characteristic impedance of each part changes depending on the shape of the ground contact conductor 10, the shape of the signal contact conductor 20, and the distance between the ground contact conductor 10 and the signal contact conductor 20. As described above, with the structure in which the width of the conductor portion changes depending on the position in the extending direction, it is possible to finely adjust the characteristic impedance and reduce the change in the characteristic impedance. Further, when the extending direction of the main surface of the conductor portion 22 is a direction intersecting with the central axis C, the characteristic impedance can be adjusted more suitably by changing the width. As described in the above embodiment, the change in the width of the conductive wire portion 22 along the longitudinal direction (X direction) may be stepwise. For example, the conductive wire portion 22 may be tapered and the width may be gradually increased. It may be configured to change.

A through hole 225 is provided in the second area 222 of the conductor portion 22. As shown in FIG. 5A, the through hole 225 extends along the extending direction (X direction) of the conductor portion 22. Further, the through hole 225 has a region 225a having a small hole diameter near the center along the extending direction. However, the shape of the through hole 225 is not particularly limited. The width (length along the Y direction) of the through hole 225 can be set to about 30% to 70% with respect to the width of the maximum portion in the second region 222, but can be appropriately changed. It should be noted that a part of the housing 30 described later enters the inside of the through hole 225. The through hole 225 is provided at a position overlapping the ground main body portion 11 of the ground contact conductor 10 when viewed from the direction along the central axis C (see FIG. 3 ). This suppresses the decrease in the characteristic impedance of the receptacle connector 2.

The contact portion 21 and the conductive wire portion 22 are connected to each other by providing the first region 221 of the conductive wire portion 22 to the lower edge (−Z side) of the contact portion 21. Around the connecting portion 212 of the contact portion 21 with the conducting wire portion 22, two cutout portions 213 are provided so as to sandwich the connecting portion 212. The lower surface 21s of the contact portion 21 and the lower surface 22s of the conductor portion 22 are formed so as to be in the same plane (XY plane) as shown in FIGS. 3 and 5C. As shown in FIG. 5( c ), the cutout portion 213 defines the inside and outside of the contact portion 21 above the height position where the lower end face is provided in the vertical direction (Z direction) of the contact portion 21 and the conductor portion 22. The opening which connects is formed.

The above-mentioned signal contact conductor 20 can be formed by bending a metal plate, for example. A metal plate having a shape corresponding to the signal contact conductor 20 is prepared, the metal plate is bent at the connection portion 212 between the conductor portion 22 and the contact portion 21, and the region to be the contact portion 21 is bent into a cylindrical shape. Thus, the signal contact conductor 20 can be obtained.

As shown in FIGS. 2 and 3, the signal contact conductor 20 is arranged so that the contact portion 21 of the signal contact conductor 20 is inside the ground main body portion 11 of the ground contact conductor 10. At this time, the conductor portion 22 connected to the contact portion 21 of the signal contact conductor 20 is provided in the space S1 provided between the

terminal portions

121 and 122 of the ground contact conductor 10 and extending along the longitudinal direction (X direction). Will be placed. At this time, the

lower surfaces

121s and 122s of the

terminal portions

121 and 122 of the ground contact conductor 10, the lower surface 21s of the contact portion 21 of the signal contact conductor 20, and the lower surface 22s of the conductor portion 22 of the signal contact conductor 20 are flush with each other ( XY plane). By injecting an insulating resin, which will be described later, into the mold set in this state, the ground contact conductor 10 and the signal contact conductor 20 are integrated, and the housing 30 is formed.

The shapes of the contact portion 21 and the conductor portion 22 can be changed respectively. Further, the contact portion 21 and the conductive wire portion 22 do not have to be made of one metal plate, and may be configured by combining a plurality of members.

(housing)
The housing 30 serves as an insulating member placed on the printed wiring board PB.

As shown in FIGS. 2 and 3, the housing 30 is provided so as to fill the space S1 provided between the

terminal portions

121 and 122 included in the external terminal portion 12 of the ground contact conductor 10. As shown in FIG. 2, the upper surface 30u of the housing 30 provided between the

terminal portions

121 and 122 is substantially flush with the

upper surfaces

121u and 122u of the

terminal portions

121 and 122, and the lower surface 30s of the housing 30 is The

lower surfaces

121s and 122s of the

terminal portions

121 and 122 are substantially flush with the lower surface.

Further, as shown in FIG. 3, the housing 30 is also connected to the lower end of the ground body 11 of the ground contact conductor 10. As a result, both the ground body portion 11 and the external terminal portion 12 of the ground contact conductor 10 are connected to the housing 30. Further, the housing 30 is connected to the

inclined portions

121b and 122b provided on the facing

surfaces

121a and 122a of the

terminal portions

121 and 122, respectively. As a result, the contact area between the housing 30 and the

terminals

121 and 122 is increased, and the adhesion between the housing 30 and the ground contact conductor 10 is improved.

Further, as shown in FIGS. 2 and 3, the housing 30 is provided so as to contact the lower end of the contact portion 21 of the signal contact conductor 20 and to fill the periphery of the conductor portion 22 except the lower surface 22s. Has been. At this time, part of the housing 30 also enters the through hole 225 provided in the second region 222 of the conductor portion 22 and fills the through hole 225. As a result, the adhesion between the housing 30 and the signal contact conductor 20 is improved. The end of the conductor portion 22 of the signal contact conductor 20 opposite to the contact portion 21, that is, the end of the third region 223 is not covered with the housing 30 and is exposed to the outside.

The housing 30 is formed inside the contact portion 21 and also outside the contact portion 21 and inside the ground main body portion 11. The housing 30 is provided so as to cover the periphery of the connecting portion 212 with the contact portion 21 and the lower end of the contact portion 21. As shown in FIG. 3, the upper surface 31u of the housing 30 inside the ground body 11 of the ground contact conductor 10 and outside the contact portion 21 is the same as the upper surface 30u of the housing 30 provided between the

terminals

121 and 122. It is almost the same. On the other hand, the upper surface 32u of the housing 30 inside the contact portion 21 is lower in position (height) from the lower surface 30S in the vertical direction (Z direction) than the

upper surfaces

30u and 31u. That is, in the up-down direction (Z direction), the height of the upper surface 32u is located closer to the bottom surface (lower surface 30s) of the housing 30 facing the printed wiring board PB than the height of the

upper surfaces

30u and 31u. .. Thus, by making the height of the upper surface 32u of the housing 30 inside the contact portion 21 lower than the height of the

upper surfaces

30u and 31u, the insulating material remains particularly on the outer peripheral surface of the contact portion 21, and the mating connector It is possible to prevent a decrease in electrical connectivity when connecting with.

As shown in FIGS. 2 and 3, a part of the upper surface 31u of the housing 30 inside the ground main body 11 and outside the contact portion 21 of the ground contact conductor 10 has a position of a height higher than the upper surface 31u. Has a low concave portion 33. The recess 33 is formed in a region surrounding the slit 211 provided in the contact portion 21 of the signal contact conductor 20 and continuous with the slit 211. Further, the height of the surface of the recess 33 is the same as the height of the upper surface 32u of the housing 30 inside the contact portion 21. The shape and size of the recess 33 are not particularly limited. However, at least the height of the surface of the housing 30 around the slit 211 outside the contact portion 21 is substantially the same as the height of the upper surface 32u of the housing 30 inside the contact portion 21, so that the recess 33 is formed. The shape and size can be set. It is to be noted that the fact that the heights are the same is not limited to the case where they are exactly the same, and the difference in height between the upper surface 32u and the recess 33 is smaller than the difference in height between the upper surface 31u and the upper surface 32u. Including cases.

[Receptacle connector assembly process]
The process of assembling the receptacle connector 2 will be described. First, the ground contact conductor 10 and the signal contact conductor 20 are prepared. As described above, the ground contact conductor 10 and the signal contact conductor 20 can be produced by, for example, pressing and bending a plate material made of a metal material.

Next, after setting the ground contact conductor 10 and the signal contact conductor 20 in the mold, an insulating material (for example, an insulating resin) is injected into the mold and cooled and solidified. That is, the housing 30 is formed by insert molding, and thus the receptacle connector 2 in which the ground contact conductor 10, the signal contact conductor 20, and the housing 30 are integrally molded can be manufactured.

The insulating material injected into the mold fills the void S1 between the

terminal portions

121 and 122 of the ground contact conductor 10 and penetrates the conductor wire portion 22 of the signal contact conductor 20 arranged in the void S1. It also goes into the hole 225. Further, the signal contact conductor 20 also enters the inside of the contact portion 21 via the cutout portion 213 provided below the contact portion 21. As a result, the insulating material inside the contact portion 21 and the insulating material outside the contact portion 21 are molded in an integrated state.

When the receptacle connector 2 is manufactured, after the signal contact conductor 20 is set in the mold and the insulating material is injected, outside the slit 211 of the signal contact conductor 20, specifically, the recess 33 in the housing 30. The component in the mold can be brought into contact with the area. With such a configuration, the signal contact conductor 20 can be accurately positioned. Further, the injected insulating material is prevented from leaking from the position where the mold is in contact.

[Plug connector]
Next, details of the plug connector 3 will be described with reference to FIGS. 6 to 12. As shown in FIGS. 6 to 8, the plug connector 3 includes a signal contact conductor 40, a ground contact conductor 60, and an insulating housing 50. The plug connector 3 is attached to the terminal portion TP of the coaxial cable SC.

The coaxial cable SC is provided in a small terminal such as a mobile phone in order to transmit a high frequency signal between various signal processing elements (for example, an antenna, a control chip for controlling the antenna, a substrate, etc.) incorporated in the small terminal. Wiring used in. As shown in FIG. 7, the coaxial cable SC is interposed between the signal line SC1 made of a conductor, the shield line SC3 made of a conductor provided around the signal line SC1, and the signal line SC1 and the shield line SC3. And a dielectric layer SC2 that covers the shield line SC3.

The plug connector 3 is attached to the terminal portion TP where the signal line SC1 and the shield line SC3 are partially exposed. More specifically, the plug connector 3 removes the insulating coating SC4, the shield line SC3, and the dielectric layer SC2 so that the exposed portion of the signal line SC1 and the exposed portion of the shield line SC3 are arranged in order from the tip. It is attached to the processed terminal portion TP. In the plug connector 3 attached to the terminal portion TP, the signal contact conductor 40 is electrically connected to the signal line SC1, the ground contact conductor 60 is electrically connected to the shield line SC3, and the housing 50 is connected to the signal contact conductor 40 and the ground contact conductor 60. Intervenes between.

The plug connector 3 attached to the terminal portion TP is connected to the receptacle connector 2 mounted on the printed wiring board PB. Specifically, the plug connector 3 is attached to the receptacle connector 2 along the thickness direction (Z direction) of the printed wiring board PB. When the plug connector 3 is mounted on the receptacle connector 2, the signal contact conductor 40 is electrically connected to the signal contact conductor 20 of the receptacle connector 2, and the ground contact conductor 60 is electrically connected to the ground contact conductor 10 of the receptacle connector 2. Connected. The plug connector 3 mounted on the receptacle connector 2 is removable from the receptacle connector 2 along the thickness direction (Z direction) of the printed wiring board PB.

Hereinafter, specific configurations of the ground contact conductor 60, the signal contact conductor 40, and the housing 50 will be described in order.

(Ground contact conductor)
As shown in FIG. 6, the ground contact conductor 60 is made of, for example, a thin plate-shaped metal material, and has a first portion 60A, a second portion 60B, and a connecting portion 60C. The first portion 60A has a fitting portion 61 and two arm portions 62. The fitting portion 61 is fitted to the ground contact conductor 10 of the receptacle connector 2. For example, the fitting portion 61 has a tubular shape (cylindrical shape) and fits on the outer circumference of the ground main body 11. The central axis of the fitting portion 61 is substantially orthogonal to the axial direction of the coaxial cable SC.

As shown in FIG. 7, a narrowed portion 611 having a partially reduced inner diameter is formed at one end (hereinafter referred to as “tip”) in the central axis direction of the fitting portion 61. The narrowed portion 611 fits into the groove 11a of the ground main body portion 11 of the ground contact conductor 10 of the receptacle connector 2 (see FIG. 12). As shown in FIG. 6, a plurality of notches 612 arranged in the circumferential direction of the fitting portion 61 are formed at the other end (hereinafter referred to as “base end”) of the fitting portion 61 in the central axis direction. .. Plural convex portions 512 (described later) of the housing 50 are fitted into the plural notch portions 612, respectively. The "cylindrical shape" is not necessarily limited to the cylindrical shape. For example, the “cylindrical shape” may be a polygonal cylindrical shape. Further, the “cylindrical shape” includes a semi-cylindrical shape with a part cut out in the circumferential direction. For example, the fitting portion 61 has a semi-cylindrical shape in which a portion near the coaxial cable SC is cut out.

The two arm portions 62 are respectively connected to both ends of the fitting portion 61 in the circumferential direction, and extend toward the outside of the fitting portion 61 while facing each other. Both of the two arm portions 62 are along the axial direction of the coaxial cable SC.

The second portion 60B has a lid portion 63, a clamp portion 64, and a barrel portion 65. The lid portion 63 closes the base end of the fitting portion 61 without overlapping the outer peripheral surface of the fitting portion 61. Specifically, the lid portion 63 is substantially flat plate-shaped over the entire area, and no folding or the like overlapping the fitting portion 61 is formed on the peripheral portion thereof. Hereinafter, a surface of the lid portion 63 that faces the base end of the fitting portion 61 is referred to as an “inner surface”, and a surface opposite to the inner surface is referred to as an “outer surface”.

As shown in FIG. 7, the clamp portion 64 holds and shields a portion of the terminal portion TP of the coaxial cable SC from which the insulating coating SC4 has been removed (hereinafter referred to as “holding portion of the terminal portion TP”). Touch line SC3. For example, the clamp portion 64 is aligned with the fitting portion 61 along the axial direction of the coaxial cable SC.

For example, the clamp part 64 includes a clamp base 641 and two clamp arms 642 as shown in FIG. The clamp base 641 is a plate-shaped portion that is continuous with the lid 63. It should be noted that the term “being connected” here includes not only the case of being directly connected but also the case of being connected through another portion.

The two clamp arms 642 are connected to both side surfaces of the clamp base 641 along the axial direction of the coaxial cable SC, and project from the inner surface of the clamp base 641 (the surface connected to the inner surface of the lid 63). The two clamp arms 642 face each other with the holding target portion of the terminal portion TP interposed therebetween, and are bent so as to wrap the holding target portion of the terminal portion TP between the clamp base 641 and the shield wire SC3. ing.

The clamp portion 64 is located at the farthest end from the fitting portion 61 in the ground contact conductor 60. More specifically, in the ground contact conductor 60, the two clamp arms 642 are located at the farthest end from the central axis of the fitting portion 61. In other words, the ground contact conductor 60 does not have a portion that comes into contact with the insulating coating SC4 at a position farther from the central axis of the fitting portion 61 than the two clamp arms 642.

The barrel portion 65 holds the housing 50 between the fitting portion 61 and the clamp portion 64. As will be described later, the housing 50 has a first portion 51 housed in the fitting portion 61 and a second portion 52 arranged between the two arm portions 62. The barrel portion 65 holds the second portion 52 together with the two arm portions 62.

For example, the barrel portion 65 includes a barrel base 651 and two barrel arms 652. The barrel base 651 is a plate-shaped portion that is interposed between the lid portion 63 and the clamp base 641 and connects them.

The two barrel arms 652 are respectively connected to both side surfaces of the peripheral edge of the barrel base 651 along the axial direction of the coaxial cable SC, and project from the inner surface of the barrel base 651 (the surface connected to the inner surface of the lid 63). The two barrel arms 652 face each other with the two arm portions 62 and the second portion 52 interposed therebetween, and are bent so as to wrap the two arm portions 62 and the second portion 52 between the barrel base 651. There is. Hereinafter, of the barrel arm 652, a portion between the bent portion and the barrel base 651 is referred to as a “base portion of the barrel arm 652”, and a tip side of the bent portion is referred to as a “tip portion of the barrel arm 652”. ..

As shown in FIG. 6, a contact claw portion 654 that protrudes inward is formed at the base of the barrel arm 652. The contact claw portion 654 presses the arm portion 62 toward the second portion 52. This strengthens the electrical connection between the barrel portion 65 and the arm portion 62.

The length of the barrel portion 65 (width of the barrel arm 652) in the axial direction of the coaxial cable SC may be set so that a gap GP1 is formed between the housing 50 and the clamp portion 64. In this case, the arm portion 62 may be configured to further hold the dielectric layer SC2 and the shield line SC3 between the housing 50 and the clamp portion 64 (gap GP1). In this case, the ground contact conductor 60 may further include a holding claw portion 653. The holding claw portion 653 protrudes inward from the barrel portion 65 between the housing 50 and the clamp portion 64 and presses the shield wire SC3 toward the dielectric layer SC2. The holding claw portion 653 may be located closer to the clamp portion 64 between the housing 50 and the clamp portion 64. In other words, the distance from the clamp part 64 to the holding claw 653 may be smaller than the distance from the housing 50 to the holding claw 653. For example, the holding claw portion 653 is formed at the tip of each barrel arm 652 (close to the base end of the coaxial cable SC).

The ground contact conductor 60 may have a gap GP2 between the fitting portion 61 and the barrel portion 65 (that is, between the fitting portion 61 and the barrel arm 652). Further, the ground contact conductor 60 may have a gap GP3 between the barrel portion 65 and the clamp portion 64 (that is, between the barrel arm 652 and the clamp arm 642).

The connecting portion 60C connects the first portion 60A and the second portion 60B. For example, the connecting portion 60C connects the base end of the fitting portion 61 and the lid 63 at the end portion in the extending direction (−X direction) of the coaxial cable SC. Before the plug connector 3 is assembled, the connecting portion 60C connects the first portion 60A and the second portion 60B with the lid 63 along the central axis of the fitting portion 61. During assembly of the plug connector 3, the connecting portion 60C is bent at a substantially right angle so that the lid portion 63 is orthogonal to the central axis of the fitting portion 61 and closes the base end of the fitting portion 61.

(Signal contact conductor)
As shown in FIG. 9, the signal contact conductor 40 is formed of, for example, a metal member on a thin plate, and is housed in the ground contact conductor 60. As shown in FIGS. 7 to 9, the signal contact conductor 40 has a contact portion 41, a connection portion 42, an intermediate portion 43, and

extension portions

44 and 45. The contact portion 41 is located inside the fitting portion 61 and contacts the signal contact conductor 20 of the receptacle connector 2.

For example, the contact part 41 includes a contact base 411 and two contact arms 412. The contact base 411 is arranged so as to be substantially orthogonal to the central axis of the fitting portion 61. The two contact arms 412 are connected to both side surfaces of the contact base 411 along the axial direction of the coaxial cable SC, and project toward the tip of the fitting portion 61. The two contact arms 412 face each other, and sandwich the contact portion 21 of the signal contact conductor 20 with the fitting portion 61 fitted to the ground main body portion 11 of the ground contact conductor 10 in the receptacle connector 2 (see FIG. 12). ).

The connecting portion 42 is located inside the space surrounded by the barrel portion 65 and is connected to the signal line SC1. The connecting portion 42 is a flat plate-shaped portion arranged perpendicular to the central axis of the fitting portion 61. As shown in FIG. 7, the connecting portion 42 has a first main surface 421 facing the barrel base 651 of the barrel portion 65 and a second main surface 422 opposite to the first main surface 421. The signal line SC1 is connected to the first main surface 421 (connection main surface). Specific examples of the method of connecting the signal line SC1 include soldering, caulking, ultrasonic bonding, and the like. As an example, the signal line SC1 is connected to the first main surface 421 by ultrasonic bonding.

The intermediate portion 43 is a flat plate-shaped portion that connects the contact base 411 of the contact portion 41 and the connecting portion 42. As shown in FIG. 7, the intermediate portion 43 has a first main surface 431 facing the lid portion 63 and the barrel base 651, and a second main surface 432 opposite to the first main surface 431. The first main surface 431 (intermediate main surface) is continuous with the first main surface 421, and the second main surface 432 is continuous with the second main surface 422. The intermediate portion 43 extends from the inside of the fitting portion 61 to the inside of the barrel portion 65, that is, in the direction connecting the contact portion 41 and the connecting portion 42, and connects the contact base 411 and the connecting portion 42.

The width of the intermediate portion 43 changes according to the position in the direction (X direction) connecting the contact portion 41 and the connecting portion 42. The width here means the length in the direction (Y direction) orthogonal to the axial direction of the coaxial cable SC. The width of the intermediate portion 43 is set so as to suppress the characteristic impedance change between the signal contact conductor 40 and the ground contact conductor 60 depending on the position in the direction (X direction) connecting the contact portion 41 and the connection portion 42. ing. When the width of the intermediate portion 43 is constant, the characteristic impedance between the intermediate portion 43 and the ground contact conductor 60 changes according to the position in the direction (X direction) connecting the contact portion 41 and the connecting portion 42. For example, the characteristic impedance is low at a position close to the ground contact conductor 60. Further, the characteristic impedance is low even at a position surrounded by more metal of the ground contact conductor 60. Thus, at the position where the characteristic impedance is low due to the relationship with the ground contact conductor 60, the width of the intermediate portion 43 is larger than at the position where the characteristic impedance is high.

For example, in the gap GP2 (the gap between the fitting portion 61 and the barrel portion 65), the ground contact conductor 60 that surrounds the intermediate portion 43 as compared with the inside of the space surrounded by the barrel portion 65 and the like. Has a small amount of metal (for example, the amount of metal per unit length) (because the barrel arm 652 does not exist). Therefore, in the portion of the intermediate portion 43 located in the gap GP2, the widened portion 433 having a larger width than both of the portion of the intermediate portion 43 located in the barrel portion 65 and the portion of the intermediate portion 43 located in the fitting portion 61 is provided. It is provided.

The width of the connecting portion 42 is larger than the width of the intermediate portion 43. The width of the connecting portion 42 may be at least larger than the average value of the width of the intermediate portion 43, and may be larger than the maximum value of the width of the intermediate portion 43 (for example, the width of the widening portion 433). In order to accurately define the average value of the width of the intermediate portion 43, etc., it is necessary to identify the boundary between the contact portion 41 and the connecting portion 42 and the boundary between the connecting portion 42 and the intermediate portion 43. Since the contact portion 41, the connecting portion 42, and the intermediate portion 43 are formed of a single metal member, there is no visible boundary. Therefore, the edge 412a of the contact arm 412 close to the connecting portion 42 is set as the boundary between the contact portion 41 and the intermediate portion 43 (see FIG. 9). Further, the edge 42a near the contact portion 41 in the portion having the same width as the portion to which the signal line SC1 is connected is defined as the boundary between the intermediate portion 43 and the connecting portion 42. The portion having the same width includes a portion having chamfered corners.

In the signal contact conductor 40, the boundary portion between the intermediate portion 43 and the connection portion 42 (a portion near the boundary) so that the first main surface 421 (connection main surface) is recessed with respect to the first main surface 431 (intermediate main surface). May be bent at.

The extension portion 44 is a flat plate-shaped portion that projects in a direction opposite to the direction from the contact base 411 to the intermediate portion 43. The extension portion 45 is a flat plate-shaped portion that projects in a direction opposite to the direction from the connection portion 42 toward the intermediate portion 43. The

extension parts

44 and 45 function as a holding allowance by the housing 50.

(housing)
As shown in FIG. 7, the housing 50 holds the signal contact conductor 40 and is accommodated in the ground contact conductor 60. For example, the housing 50 has a first portion 51 and a second portion 52. The first portion 51 is housed in the fitting portion 61 and holds the contact portion 41 and a part of the intermediate portion 43 near the contact portion 41.

The first portion 51 has a recess 511 for exposing the contact portion 41 toward the tip of the fitting portion 61. As a result, the contact portion 41 can be brought into contact with the contact portion 21 of the signal contact conductor 20 of the receptacle connector 2. Further, the outer diameter of the tip portion of the first portion 51 (portion near the tip of the fitting portion 61) is smaller than the inner diameter of the fitting portion 61. As a result, the ground main body 11 of the ground contact conductor 10 can be introduced between the fitting portion 61 and the first portion 51.

The second portion 52 projects from the first portion 51 in a direction in which the two arm portions 62 extend (X direction), and holds the connection portion 42 and a part of the intermediate portion 43 located near the connection portion 42. To do. As described above, at least a part of the second portion 52 is held by the barrel portion 65 together with the two arm portions 62.

The second portion 52 may be configured to form a cavity between the connecting portion 42 and the ground contact conductor 60. The second portion 52 may have an opening for ultrasonically connecting the signal line to the connecting portion 42, and at least a part of the cavity may be formed by the opening. The second portion 52 may have openings on both the first main surface 421 side and the opposite side of the first main surface 421. The opening here means an opening that exposes at least a part of the first main surface 421 or the second main surface 422 of the connection portion 42 to the outside of the housing 50.

For example, the second portion 52 has a recess 521 that exposes the first main surface 421 toward the barrel base 651 (see FIG. 10). As a result, the opening OP1 that exposes a part of the first main surface 421 to the outside of the housing 50 is formed in the second portion 52 (see FIG. 7). The concave portion 521 is also opened in the second portion 52 on the opposite side of the first portion 51 (close to the proximal end of the coaxial cable SC). The opening OP1 is used to press the signal line SC1 against the first main surface 421 with a tool for ultrasonic bonding. The opening OP1 defines a cavity CC1 between the first main surface 421 and the barrel base 651.

Further, a through hole 523 for exposing the second main surface 422 toward the tip portion of the arm portion 62 is formed in a portion of the second portion 52 that constitutes the bottom surface of the recess 521 (see FIG. 11 ). .. As a result, the second portion 52 has an opening OP2 that exposes a part of the second main surface 422 to the outside of the housing 50. The opening OP2 is used to press the tool for supporting the connecting portion 42 against the second main surface 422 from the opposite side of the ultrasonic welding tool. The opening OP2 defines a cavity CC2 between the second main surface 422 and the tip of the barrel arm 652.

As shown in FIGS. 10 and 11, a plurality of convex portions 512 arranged in the circumferential direction are provided on the outer periphery of the base end portion of the first portion 51 (portion on the base end side of the fitting portion 61). As described above, the plurality of convex portions 512 are fitted into the plurality of cutout portions 612 of the fitting portion 61 (see FIG. 6 ). The convex portion 512 fitted in the cutout portion 612 may project outward from the peripheral edge of the lid portion 63 (see FIG. 12 ). In other words, the protruding amount of the lid portion 63 with respect to the outer circumference of the fitting portion 61 may be smaller than the protruding amount of the convex portion 512 with respect to the outer circumference of the fitting portion 61.

[Plug connector assembly process]
The assembly process of the plug connector 3 will be described. First, the signal contact conductor 40 is prepared, the signal contact conductor 40 is set in a mold, and then an insulating material (for example, an insulating resin) is injected into the mold to be cooled and solidified. That is, the housing 50 is formed by insert molding while holding the signal contact conductor 40. Next, the ground contact conductor 60 is prepared, and the housing 50 is set in the ground contact conductor 60 by fitting the plurality of convex portions 512 into the plurality of cutout portions 612 of the fitting portion 61, respectively. The signal contact conductor 40 and the ground contact conductor 60 can be formed by punching a metal member having a predetermined shape from a thin metal plate and subjecting the metal member to plastic working such as bending. As described above, the ground contact conductor 60 is in a state in which the first portion 60A and the second portion 60B are connected by the connecting portion 60C with the lid portion 63 along the central axis of the fitting portion 61. There is. Further, neither the two barrel arms 652 nor the two clamp arms 642 are bent.

Next, in the opening OP1 of the housing 50, the signal line SC1 is ultrasonically bonded to the first main surface 421 of the connecting portion 42. Specifically, a tool for supporting the connecting portion 42 is inserted into the opening OP2 and pressed against the second main surface 422, and a tool for ultrasonic bonding is inserted into the opening OP1 to connect the signal line SC1 to the first main surface. Press on the surface 421. In this state, ultrasonic waves are applied to the signal line SC1 by an ultrasonic bonding tool to cause melting of the plating or the like to bond the signal line SC1 to the first main surface 421.

Next, the connecting portion 60C is bent and the lid 63 closes the base end of the fitting portion 61. At this time, the two arm portions 62 and the second portion 52 of the housing 50 are accommodated in the two barrel arms 652, and the holding target portion of the terminal portion TP is accommodated in the two clamp arms 642.

Next, the two clamp arms 642 are bent so that the holding target portion of the terminal portion TP is wrapped between the clamp base 641 and the two arm portions 62 and the second portion 52 are wrapped between the barrel base 651. Bend the two barrel arms 652. This completes the assembly process of the plug connector 3.

[Effect]
Next, the function and effect of the connector assembly 1 described above will be described.

(Receptacle connector)
In the receptacle connector 2 included in the connector assembly 1, the ground contact conductor 10 includes a cylindrical ground main body 11 extending along a central axis C that is a predetermined axis, and a central body C of the ground main body 11 in the direction of the central axis C. And an external terminal portion 12 provided at one of the end edges. Further, in the receptacle connector 2, the signal contact conductor 20 extends inwardly of the ground body 11 in the direction of the central axis C, and contacts with the signal contact conductor of the plug connector 3 (contact conductor of the mating connector) 21. An extending direction that intersects with the central axis C direction from one end edge of the contact portion 21 in the central axis C direction (edge on the same side as the side on which the external terminal portion 12 is provided in the ground body portion 11). And a substantially flat plate-shaped conductor portion 22 that extends to the. Then, the conductive wire portion 22 has a pair of main surfaces that intersect and extend in the central axis C direction, and the width thereof changes depending on the position in the extending direction. In the high frequency range, highly accurate impedance matching in the connector is required. With the structure in which the width of the conductor portion 22 changes depending on the position in the extending direction like the receptacle connector 2 described above, the characteristic impedance can be finely adjusted and the change in the characteristic impedance can be reduced. .. Further, since the pair of main surfaces intersects and extends in the axial direction, the height reduction of the receptacle connector 2 is realized. Then, the characteristic impedance can be suitably adjusted by changing the width of the conductive wire portion 22 extending in the axial direction so that the pair of main surfaces intersects with each other in the axial direction.

In addition, a region 221a that is the smallest portion having the smallest width of the conductor portion 22 is provided at a position closest to the contact portion 21 of the conductor portion 22, and the conductor portion 22 is located at a position apart from the smallest portion in the extending direction. Is provided with a second region 222 including the maximum portion having the maximum width. The width of the conductive wire portion 22 gradually increases from the minimum portion to the maximum portion. When the width of the conductor portion 22 of the conductor portion 22 closest to the contact portion 21 is increased, the characteristic impedance is reduced due to the influence of the ground contact conductor 10, and thus the change width of the characteristic impedance may be increased. There is. On the other hand, by minimizing the width of the conductor portion 22 in the area as described above, it is possible to reduce the change in the characteristic impedance with respect to the contact portion 21. Further, the maximum portion where the width of the conductor portion 22 is maximum is provided separately from the minimum portion, and the width is gradually changed, so that the change of the characteristic impedance due to the change of the width of the conductor portion 22 is reduced. You can Note that the change in width for achieving the above effect may be stepwise or gradual.

Also, a through hole 225 is provided in the largest part of the above-mentioned conducting wire portion 22, and a part of the housing 30 is inserted inside the through hole 225. It is conceivable that the characteristic impedance may be reduced in the wide area of the conductor portion 22. On the other hand, since the through hole 225 is provided in the widest maximum portion, the decrease in the characteristic impedance in the region is suppressed. Furthermore, since a part of the housing 30 is inserted inside the through hole 225, the adhesion between the housing 30 and the signal contact conductor 20 is enhanced.

Further, the through hole 225 is provided at a position overlapping the ground body 11 of the ground contact conductor 10 when viewed from the central axis C direction. Since the position where the ground main body portion 11 of the ground contact conductor 10 and the conductor wire portion 22 of the signal contact conductor 20 overlap each other is a region in which they are close to each other, there is a possibility that the characteristic impedance may decrease. On the other hand, by providing the through hole 225 in the conductor portion 22, it is possible to reduce the number of signal contact conductors 20 that are close to the ground main body portion 11 of the ground contact conductor 10, so that the characteristic impedance is suppressed from decreasing. ..

Further, the receptacle connector 2 has a signal contact conductor 20 and a ground contact conductor 10, and a housing 30 that insulates the signal contact conductor 20 and the ground contact conductor 10 while integrating them. The ground contact conductor 10 includes a cylindrical ground main body 11 extending along a predetermined center axis C, and an external terminal portion 12 provided on one end of the ground main body 11 in the central axis C direction. ,have. The signal contact conductor 20 has a substantially tubular shape that extends inwardly of the ground main body 11 in the central axis C direction and has a slit 211 extending in the central axis C direction. The signal contact conductor 20 is a signal contact for the plug connector 3 (counterpart connector). From the contact portion 21 in contact with the conductor 40 and one end edge of the contact portion 21 in the central axis C direction (the end edge on the same side of the ground main body portion 11 as the side on which the external terminal portion 12 is provided), the central axis C And a conducting wire portion 22 extending in the extending direction intersecting the direction. The housing 30 comes into contact with the edge of the contact portion 21 of the signal contact conductor 20 where the conductor wire portion 22 is provided, and also between the contact portion 21 and the ground main body portion 11 and inside the contact portion 21. The height of the surface inside the contact portion 21 along the central axis C direction inside the contact portion 21 is larger than the height of the surface between the contact portion 21 and the ground main body portion 11 along the central axis C direction. It is located closer to the bottom surface facing the printed wiring board PB. With the above configuration, when the housing 30 is formed by the insert molding as described above, even if a burr or the like due to the material forming the housing 30 occurs, the burr affects the contact with the counterpart contact conductor. The risk given can be reduced. Therefore, it is possible to suppress the occurrence of connection failure due to the molding of the housing 30.

Further, in at least a part of the area between the contact portion 21 and the ground body portion 11 that is continuous from the slit 211, the height of the surface of the housing 30 along the central axis C direction is the center inside the contact portion 21. The height may be the same as the height of the surface along the direction of the axis C. When the housing 30 is formed by insert molding, a material forming the housing, such as a resin material, moves inside and outside the slit 211 during molding. Therefore, burrs and the like may occur due to the material that moves inside and outside the slit 211. As in the above-described configuration, the height of the housing 30 in the region continuous from the slit 211 is set to the same height as the inside of the contact portion 21, so that even if burrs or the like occur around the slit 211, the burrs will plug into the plug. It is possible to reduce the risk of affecting the contact of the connector 3 with the signal contact conductor 40 (counterpart signal contact conductor). Therefore, it is possible to further suppress the occurrence of connection failure due to the molding of the housing 30. Further, when manufacturing the receptacle connector 2, the signal contact conductor 20 is set in the mold, and then a component in the mold is brought into contact with the outside of the slit 211 at the time of injecting the insulating material, so that a signal is generated in the mold. The contact conductor 20 can be accurately positioned. Furthermore, since the component in the mold contacts the outside of the slit 211, it is possible to prevent the insulating material from leaking out from the relevant portion.

Further, a cutout portion 213 is provided continuously to the conductive wire portion 22 at an end edge of the contact portion 21 of the signal contact conductor 20 where the conductive wire portion 22 is provided. In the cutout portion 213, the contact portion 21 and the ground main body portion 11 are connected. The housing 30 in between and the housing 30 inside the contact portion 21 are continuous. Since the housing 30 is continuous between the contact portion 21 and the ground main body portion 11 and inside the contact portion 21 via the cutout portion 213, the housing 30, the ground contact conductor 10, and the signal contact conductor 20 are connected to each other. The adhesion of is improved. Therefore, damage to the receptacle connector 2 can be prevented.

(Plug connector)
In the plug connector 3, the ground contact conductor 60 holds the fitting portion 61 that fits into the ground contact conductor 10 of the receptacle connector 2 and the portion of the terminal portion TP of the coaxial cable SC from which the insulating coating SC4 has been removed. The clamp portion 64 is in contact with the shield wire SC3, and the clamp portion 64 is located at the farthest end from the fitting portion 61 in the ground contact conductor 60. When a part of the ground contact conductor 60 faces the shield wire SC3 via the insulating coating SC4, the stability of the characteristic impedance in the transmission path of the high frequency signal is lowered due to the electrostatic capacity of the part. On the other hand, according to the plug connector 3, since the clamp portion 64 that comes into contact with the shield wire SC3 is located at the farthest end from the fitting portion 61, in the ground contact conductor 60, the shield wire SC3 is provided via the insulating coating SC4. The part facing is reduced. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

The ground contact conductor 60 may further include a barrel portion 65 that holds the housing 50 between the fitting portion 61 and the clamp portion 64, and the barrel portion 65 further includes the dielectric layer SC2 and the shield line SC3. It may be configured to hold. In the configuration in which the clamp portion 64 is located at the farthest end from the fitting portion 61, it is difficult to separately provide a portion that holds the coaxial cable SC from the outside of the insulating coating SC4 (hereinafter, referred to as “outer skin clamp”). On the other hand, according to the configuration in which the barrel portion 65 further holds the dielectric layer SC2 and the shield wire SC3 between the housing 50 and the clamp portion 64, the ground contact conductor 60 is provided by the barrel portion 65 instead of the outer cover clamp. It is possible to reinforce the connection between the cable and the coaxial cable SC.

The ground contact conductor 60 may further include a holding claw portion 653 that protrudes inward from the barrel portion 65 and pushes the coaxial cable SC toward the dielectric layer SC2. In this case, the reinforcing effect of the barrel portion 65 at the connecting portion between the ground contact conductor 60 and the coaxial cable SC can be further enhanced. Further, the barrel portion 65 and the shield wire SC3 can be electrically connected more firmly, and the characteristic impedance can be further improved.

The holding claw portion 653 may be located closer to the clamp portion 64 between the housing 50 and the clamp portion 64. In this case, the reinforcing effect can be further enhanced by the holding claw portion 653, and the barrel portion 65 and the shield wire SC3 can be more firmly connected to each other.

The housing 50 may have openings OP1 and OP2 for ultrasonically connecting the signal line SC1 to the connecting portion 42. According to the configuration in which the signal line SC1 is ultrasonically joined to the connection portion 42, the posture of the signal line SC1 after joining is stable as compared with solder joining or the like, so that the stability of the characteristic impedance can be further improved. is there. Further, since the thermal damage to the dielectric layer SC2 at the time of joining is small as compared with solder joining or the like, it is possible to shorten the exposed length of the signal line SC1 and bring the tip of the dielectric layer SC2 closer to the connecting portion 42. it can. Therefore, the holding margin of the dielectric layer SC2 and the shield line SC3 by the barrel portion 65 can be lengthened, and the reinforcing effect of the barrel portion 65 can be further enhanced.

The ground contact conductor 60 may further include a lid portion 63 that closes one end of the fitting portion 61 without overlapping the outer peripheral surface of the fitting portion 61. In this case, the structure in which the lid portion 63 does not overlap the outer peripheral surface of the fitting portion 61 further reduces the number of locations where capacitance is likely to occur. Therefore, it is more effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

In the signal contact conductor 40, the contact portion 41 and the connection portion are arranged so as to suppress the characteristic impedance change between the signal contact conductor 40 and the ground contact conductor 60 depending on the position between the contact portion 41 and the connection portion 42. The width of the intermediate portion 43 may be changed depending on the position between the

intermediate portion

43 and 42. In this case, the change in the characteristic impedance from the connecting portion 42 to the contact portion 41 is suppressed by the width of the intermediate portion 43. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

In the portion of the intermediate portion 43 located in the gap GP2 between the fitting portion 61 and the barrel portion 65, there are a portion of the intermediate portion 43 located in the fitting portion 61 and a portion of the intermediate portion 43 located in the barrel portion 65. The widened portion 433 having a width larger than any of the above may be provided. Between the fitting portion 61 and the barrel portion 65, the amount of metal on the side of the ground contact conductor 60 is smaller than that in the barrel portion 65 or the like. Therefore, the characteristic impedance between the signal contact conductor 40 and the ground contact conductor 60 tends to be higher than that in the barrel portion 65 or the like. On the other hand, by providing the widened portion 433 in the intermediate portion 43, it is possible to prevent the characteristic impedance from increasing in the path from the connection portion 42 to the contact base 411.

The width of the connecting portion 42 is larger than the width of the intermediate portion 43, and the housing 50 may be configured to form cavities CC1 and CC2 between the connecting portion 42 and the ground contact conductor 60. In this case, the workability of connecting the signal line SC1 to the connecting portion 42 is improved by increasing the width of the connecting portion 42. On the other hand, when the width of the connecting portion 42 increases, the characteristic impedance of the connecting portion 42 decreases. On the other hand, since the housing 50 forms the cavities CC1 and CC2 between the connecting portion 42 and the ground contact conductor 60, the permittivity between the connecting portion 42 and the ground contact conductor 60 becomes low. Therefore, the characteristic impedance is prevented from being lowered due to the increased width of the connection portion 42. Therefore, both workability of connection of the signal line SC1 and suppression of change in characteristic impedance can be achieved.

At least a part of the cavities CC1 and CC2 may be formed by the openings OP1 and OP2 for ultrasonically bonding the signal line SC1 to the connecting portion 42. In this case, the openings OP1 and OP2 contribute to both suppressing the characteristic impedance change and improving the workability of ultrasonic bonding. Therefore, compatibility between workability of connection of the signal line SC1 and suppression of change in characteristic impedance can be more reliably achieved.

The connection portion 42 has a first main surface 421 for connecting the signal line SC1, the intermediate portion 43 has a first main surface 431 that is continuous with the first main surface 421, and the signal contact conductor 40 has a first The first main surface 421 may be bent at the boundary between the intermediate portion 43 and the connecting portion 42 so as to be recessed with respect to the first main surface 431. In this case, the balance between the distance between the connecting portion 42 and the ground contact conductor 60 and the distance between the signal line SC1 connected to the connecting portion 42 and the ground contact conductor 60 is adjusted, so that the characteristic impedance change is more reliably performed. Can be suppressed.

(Modification of plug connector)
A plug connector 3A according to a modification will be described with reference to FIGS. 13 and 14.

As shown in FIG. 13, the plug connector 3A includes a signal contact conductor 40A, a ground contact conductor 60, and an insulating housing 50. The plug connector 3A is different from the plug connector 3 in the shape of the signal contact conductor 40A. Similarly to the plug connector 3, the plug connector 3A is attached to the terminal portion TP where the signal line SC1 and the shield line SC3 are partially exposed. Also in the plug connector 3A attached to the terminal portion TP, the signal contact conductor 40A is electrically connected to the signal line SC1.

Like the signal contact conductor 40, the signal contact conductor 40A of the plug connector 3A has a contact portion 41, a connection portion 42, an intermediate portion 43, and extension portions 44 and 45 (see FIG. 14). The shape of the contact portion 41, the connecting portion 42, and the

extension portions

44 and 45 in the signal contact conductor 40A is the same as that of the signal contact conductor 40, but the shape of the intermediate portion 43 is different from that of the signal contact conductor 40.

As shown in FIG. 13, the intermediate portion 43 of the signal contact conductor 40A has a first main surface 431 and a second main surface 432 opposite to the first main surface 431 in the Z direction. Further, in the intermediate portion 43, the distance in the Z direction from the ground contact conductor 60 changes along the direction (X direction) connecting the contact portion 41 and the connection portion 42. Specifically, the intermediate portion 43 has a convex portion 435 such that the first main surface 431 has a convex shape along the direction (X direction) connecting the contact portion 41 and the connecting portion 42. The convex portion 435 is shaped so as to have a concave shape on the second main surface 432. As a result, as shown in FIG. 13, the signal contact conductor 40A has a shorter distance in the Z direction from the ground contact conductor 60 than the contact base 411 that is the base of the contact portion 41 in the convex portion 435. The convex portion 435 is opposed to a region that connects the lid portion 63 of the ground contact conductor 60 and the barrel base 651 of the barrel portion 65. The distance between the facing surface 69 of the ground contact conductor 60 and the first main surface 431 of the protrusion 435 of the signal contact conductor 40A is shorter than that of the contact base 411 that is the base of the contact portion 41. The convex portion 435 is not provided with irregularities or the like in the width direction (Y direction) of the intermediate portion 43, and the distance from the ground contact conductor 60 in the Y direction is uniform.

The convex portion 435 of the intermediate portion 43 suppresses the characteristic impedance change between the signal contact conductor 40A and the ground contact conductor 60 depending on the position in the direction (X direction) connecting the contact portion 41 and the connection portion 42. It is set. When the distance in the Z direction between the intermediate portion 43 and the ground contact conductor 60 is constant, the characteristic impedance between the intermediate portion 43 and the ground contact conductor 60 is the direction connecting the contact portion 41 and the connecting portion 42 (X direction). ) Can vary depending on the position. With respect to this point, in the signal contact conductor 40 of the plug connector 3 described in the above embodiment, the width of the intermediate portion 43 (the length along the Y direction) is changed to suppress the change in the characteristic impedance. On the other hand, in the plug connector 3A according to the modification, the change in the characteristic impedance is suppressed by adjusting the distance in the Z direction between the intermediate portion of the signal contact conductor 40A and the ground contact conductor 60. As an example, at the position where the characteristic impedance becomes high due to the relationship with the ground contact conductor 60, the first main surface 431 of the intermediate portion 43 and the ground contact are compared with the position where the characteristic impedance becomes low by providing the convex portion 435. The characteristic impedance is adjusted to be low by reducing the distance in the Z direction from the conductor 60.

As described above, in the middle portion 43 of the signal contact conductor 40A of the plug connector 3A, the distance in the Z direction from the ground contact conductor changes along the direction (X direction) connecting the contact portion 41 and the connection portion 42. Good. With such a configuration, the characteristic impedance change from the contact portion 41 to the connection portion 42 is caused by the change in the Z direction distance between the intermediate portion 43 (particularly the first main surface 431) and the ground contact conductor 60. Suppressed. Therefore, it is effective for improving the stability of the characteristic impedance in the transmission path of the high frequency signal.

Further, when the convex portion 435 having a shorter distance in the Z direction from the ground contact conductor 60 than the base portion of the contact portion 41 is provided, the convex portion 435 can lower the characteristic impedance. Therefore, the convex portion 435 is effective for adjustment for the purpose of reducing the characteristic impedance.

Contrary to the convex portion 435, the first main surface 431 has a concave shape and the second main surface 432 has a convex shape along the direction (X direction) connecting the contact portion 41 and the connecting portion 42. Providing a recess is also effective for adjusting the characteristic impedance. The signal contact conductor 40B shown in FIG. 15 has a concave portion 436 between the convex portion 435 and the connecting portion 42. In the recess 436, the distance in the Z direction between the first main surface 431 and the ground contact conductor 60 is longer than that of the contact base 411 that is the base of the contact portion 41. As described above, when the recess 436 is longer than the base of the contact portion 41 in the Z direction with respect to the ground contact conductor 60, the recess 436 can increase the characteristic impedance. Therefore, the recess 436 is effective for adjustment for the purpose of increasing the characteristic impedance.

In the signal contact conductor 40C shown in FIG. 16, only the recess 436 is provided in the intermediate portion 43. In this way, only the recess 436 may be provided to suppress the change in the characteristic impedance.

Further, in the signal contact conductors 40A to 40C, the width (length along the Y direction) of the intermediate portion 43 is uniform along the direction (X direction) connecting the contact portion 41 and the connecting portion 42, The convex portion 435 or the concave portion 436 makes it possible to adjust the distance in the Z direction from the ground contact conductor 60. As described above, in the signal contact conductors 40A to 40C, the characteristic impedance can be adjusted without changing the width of the intermediate portion 43.

On the other hand, like the plug connector 3 described in the above embodiment, by adjusting the characteristic impedance by changing the width (length along the Y direction) of the intermediate portion 43, and by providing the convex portion 435 or the concave portion 436. You may combine with characteristic impedance. In the signal contact conductor 40D shown in FIG. 17, a convex portion 435 is provided on the intermediate portion 43. Further, in the intermediate portion 43, the widened portion 433 having a width (length along the Y direction) larger than both the portion of the intermediate portion 43 located in the barrel portion 65 and the portion of the fitting portion 61. Is provided. In the signal contact conductor 40D, since the widened portion 433 and the convex portion 435 overlap each other, the convex portion 435 has a so-called wide shape.

In the signal contact conductor 40E shown in FIG. 18, the intermediate portion 43 is provided with the convex portion 435 and the concave portion 436. Further, the intermediate portion 43 is provided with a widened portion 433, and the widened portion 433 overlaps the convex portion 435 and the concave portion 436. Therefore, in the signal contact conductor 40E, both the convex portion 435 and the concave portion 436 have a so-called wide shape. Furthermore, in the signal contact conductor 40F shown in FIG. 19, a recess 436 is provided in the intermediate portion 43. Further, the widened portion 433 is provided in the intermediate portion 43, and the widened portion 433 overlaps with the concave portion 436. Therefore, in the signal contact conductor 40F, both the convex portion 435 and the concave portion 436 have a so-called wide shape.

As described above, the characteristic impedance is adjusted by changing the width (the length along the Y direction) by providing the widened portion 433 and the distance in the Z direction from the ground contact conductor 60 by providing the convex portion 435 or the concave portion 436. Can be used together with the characteristic impedance due to the change of. That is, in order to suppress the characteristic impedance change between the signal contact conductor 40 and the ground contact conductor 60 depending on the position between the contact portion 41 and the connection portion 42, the contact impedance between the contact portion 41 and the connection portion 42 is suppressed. With the configuration in which at least one of the area and the distance of the signal contact conductor facing the ground contact conductor 60 changes depending on the position, the stability of the characteristic impedance in the transmission path of the high frequency signal can be improved.

The positions where the convex portion 435 and the concave portion 436 are provided can be changed as appropriate in consideration of the change in the characteristic impedance. Further, regarding the convex portion 435 and the concave portion 436, the distance in the Z direction from the ground contact conductor 60 when compared with the contact base 411 which is the base portion of the contact portion 41 or when compared with the main portion of the intermediate portion 43. The difference can be changed appropriately. Further, the length of the convex portion 435 and the concave portion 436 along the direction (X direction) connecting the contact portion 41 and the connecting portion 42, and the length of the convex portion 435 and the concave portion 436 in the Z direction. It is also possible to appropriately change how much is set. Also, the positional relationship with the widened portion 433 can be appropriately changed.

DESCRIPTION OF SYMBOLS 1... Connector assembly, 2... Receptacle connector, 3, 3A... Plug connector, 10... Ground contact conductor, 11... Ground main body part, 12... External terminal part, 20... Signal contact conductor, 21... Contact part, 22... Conductor wire Part, 30... Housing, 33... Recess, 40, 40A-40F... Signal contact conductor, 41... Contact part, 42... Connection part, 43... Intermediate part, 50... Housing, 60... Ground contact conductor, 61... Fitting part , 63... Lid portion, 64... Clamping portion, 65... Barrel portion, 421, 431... First main surface, 433... Widened portion, CC1, CC2... Cavity, OP1, OP2... Opening, SC... Coaxial cable, SC1... Signal Wire, SC3... Shielded wire, SC2... Dielectric layer, SC4... Insulating coating, TP... Terminal portion.

Claims

In a coaxial cable having a signal wire and a shield wire, a dielectric layer interposed between the signal wire and the shield wire, and an insulating coating covering the shield wire, the insulating coating is removed, and the signal wire and the A connector in which a shield wire is attached to a partially exposed terminal portion and is connected to a mating connector mounted on a wiring board,
A signal contact conductor conducting with the signal line;
A ground contact conductor that conducts with the shield wire,
An insulating housing interposed between the signal contact conductor and the ground contact conductor,
The signal contact conductor is
A contact portion that comes into contact with the signal contact conductor of the counterpart connector,
A connection portion to which the signal line is connected,
An intermediate portion connecting the contact portion and the connection portion,
To suppress the characteristic impedance change between the signal contact conductor and the ground contact conductor according to the position in the direction connecting the contact portion and the connection portion, the signal contact conductor facing the ground contact conductor is suppressed. A connector in which at least one of area and distance is changing.
The connector according to claim 1, wherein the intermediate portion has a width that varies depending on a position in a direction connecting the contact portion and the connection portion.
The ground contact conductor is
A mating portion that mates with the ground contact conductor of the mating connector,
A clamp part that holds the part of the coaxial cable at which the insulating coating is removed and is in contact with the shielded wire,
A barrel portion that holds the housing between the fitting portion and the clamp portion,
The contact portion is located in the fitting portion, the connection portion is located in the barrel portion,
There is a gap between the fitting portion and the barrel portion, and a portion of the intermediate portion located in the gap is located in the fitting portion of the intermediate portion and in the barrel portion. The connector according to claim 2, wherein a widened portion having a width larger than any of the portions to be formed is provided.
The width of the connecting portion is larger than the width of the intermediate portion,
The connector according to claim 3, wherein the housing is configured to form a cavity between the connecting portion and the ground contact conductor.
The connector according to claim 4, wherein the housing has an opening for ultrasonically bonding a signal line to the connection portion, and at least a part of the cavity is formed by the opening.
The connector according to claim 1, wherein a distance between the intermediate portion and the ground contact conductor changes along a direction connecting the contact portion and the connection portion.
The connector according to claim 6, wherein the intermediate portion has a convex portion having a shorter distance from the ground contact conductor than the base portion of the contact portion.
The connector according to claim 6, wherein the intermediate portion has a concave portion that is longer than the base portion of the contact portion with the ground contact conductor.
The connection portion has a connection main surface for connecting the signal line,
The intermediate portion has an intermediate main surface continuous with the connection main surface,
9. The connector according to claim 1, wherein the signal contact conductor is bent at a boundary portion between the intermediate portion and the connection portion such that the connection main surface is recessed with respect to the intermediate main surface. ..