JP2024045909A - coaxial electrical connector - Google Patents

Abstract

To provide a coaxial electrical connector that can be easily and inexpensively manufactured, even if there is a design change regarding dimensions in a connector connection direction.SOLUTION: A coaxial electrical connector 1 relays mating coaxial connectors 2, 3 by connecting mating coaxial connectors 2, 3 one from each other's opposite side. The coaxial electrical connector 1 has a relay body 10 extending in the direction of connection with the mating coaxial connectors 2, 3 and shell members 20, 30 provided at respective ends of the relay body 10 in the direction of connection and capable of mating with the mating coaxial connectors 2, 3. The relay body 10 is a semi-rigid cable.SELECTED DRAWING: Figure 3

Description

The present invention relates to a coaxial electrical connector that connects mating coaxial connectors one by one from opposite sides and relays the mating coaxial connectors together.

As this type of coaxial electrical connector, a coaxial electrical connector to which one mating connector is connected from above and one from below is disclosed, for example, in Patent Document 1. This coaxial electrical connector includes a plurality of coaxial terminals extending in the connector connection direction (vertical direction) and a housing that holds these coaxial terminals. A coaxial terminal includes a substantially cylindrical metal outer conductor, an insulator disposed within the outer conductor, and a center conductor arranged concentrically with the outer conductor within the outer conductor and held by the insulator. have.

JP 2020-123483 A

In a connector to which mating connectors are connected from above and below, as disclosed in Patent Document 1, the distance between the mating connectors in the vertical direction is determined by the electrical distance in which the connector assembly (coaxial electrical connector and mating connector) is provided. It is set appropriately depending on the size and shape of the device. Further, the vertical dimension of the coaxial terminal is also set according to the above distance. In Patent Document 1, the outer conductor, center conductor, and insulator of the coaxial terminal are each configured as a single member extending in the vertical direction. Therefore, if there is a design change in the vertical dimension of a coaxial terminal, the outer conductor, center conductor, and insulator must be newly designed and manufactured according to the vertical dimension, and the coaxial terminal and coaxial It takes time and effort to manufacture the electrical connector, and the cost may increase.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a coaxial electrical connector that can be easily and inexpensively manufactured even if the dimensions in the connector connection direction are changed in design.

(1) In the coaxial electrical connector according to the present invention, the mating coaxial connectors are connected one by one from opposite sides to relay the mating coaxial connectors.

In this coaxial electrical connector, the present invention is characterized in that it has a relay body that extends in the connection direction with the mating coaxial connector, and a shell member that is provided at each end of the relay body in the connection direction and can be fitted into the mating coaxial connector, and the relay body is a semi-rigid cable.

In the present invention, the coaxial electrical connector has a relay body, which is a semi-rigid cable extending in the connection direction, and a shell member provided at each end of the relay body. When manufacturing a coaxial electrical connector, a semi-rigid cable having the required electrical characteristics is prepared in advance with a sufficient length, and this semi-rigid cable is cut to a set length to form a relay body, and a shell member is attached to each end of the relay body. Therefore, even if the dimensions of the coaxial connector in the connection direction are changed according to the size and shape of the electrical equipment, the relay body can be easily obtained by cutting the semi-rigid cable to a length according to the changed dimensions. In addition, even if the dimensions of the coaxial connector in the connection direction are changed, the shell member can be used the same as before the change, so there is no need to design it anew. Therefore, in the present invention, the coaxial electrical connector can be easily manufactured. In addition, since there is no need to newly design the relay body and the shell member, the increase in manufacturing costs can be suppressed.

(2) In the invention of (1), the shell member has a cylindrical shape with the connection direction being the axial direction, and has a fitting portion that can be fitted to the mating coaxial connector, and an outer portion at the end of the relay body. and a mounting part that is attached in an inserted state, and the mounting part may be attached to the end part by welding, adhesion with an adhesive, or plastic deformation in the radial direction. . In this way, if the mounting part can be attached to the end of the relay body by welding, adhesive bonding, or radial plastic deformation, it is possible to attach the shell member to the relay body when manufacturing coaxial electrical connectors. Easy to install.

(3) In the invention of (1) or (2), the mounting portion has an outer insertion portion formed with an inner diameter equal to or larger than the outer diameter of the relay and inserted onto the end of the relay, and a positioning portion formed with an inner diameter smaller than the outer diameter of the relay, the inner peripheral surface of the mounting portion has a step at the boundary between the outer insertion portion and the positioning portion, the relay is positioned by the end face of the relay's external conductor abutting against the step in the connection direction, the step is formed as a tapered surface with an abutment surface that abuts against the end face of the external conductor inclined with respect to the connection direction, and the end face of the external conductor may be formed as a tapered surface that can come into contact with the abutment surface.

When the inner diameter portion of the shell member is formed by cutting with a processing tool such as a drill, the stepped portion of the mounting portion is often formed with a tapered surface that follows the shape of the tip of the processing tool as the contact surface. . Therefore, by forming the end surface of the outer conductor that comes into contact with this stepped portion into a tapered surface so that the end surface can come into contact with the contact surface of the stepped portion, the outer conductor can be tapered while being positioned by the contact surface. Since the surfaces are in contact with each other, no gap is formed between the outer conductor and the shell member in the connection direction. Therefore, the impedance disturbance that occurs when the gap is present is suppressed, and the impedance is easily kept constant, resulting in improved electrical characteristics of the coaxial electrical connector.

The present invention provides a coaxial electrical connector that can be manufactured simply and inexpensively even if there are design changes to the dimensions in the connector connection direction.

1 is a perspective view showing a coaxial electrical connector according to an embodiment of the present invention together with a mating coaxial connector, in which (A) shows a state before connector fitting and connection, and (B) shows a state after connector fitting and connection. FIG. 2 is a perspective view showing each member of the coaxial electrical connector of FIG. 1 separated. 2A and 2B are cross-sectional views showing a cross section of the coaxial electrical connector and the mating coaxial connector of FIG. 1 taken along a plane including the axis thereof, in which FIG. 2A shows a state before the connectors are mated and connected, and FIG. 2B shows a state after the connectors are mated and connected. FIG. 3A is a partially enlarged sectional view of FIG. 3(A), showing an enlarged connection portion between the relay body and the lower shell member. 1A and 1B are perspective views showing coaxial electrical connectors according to modified embodiments of the present invention, where FIG. 1A shows a first modified coaxial electrical connector, and FIG. 1B shows a second modified coaxial electrical connector.

The following describes an embodiment of the present invention with reference to the attached drawings.

1(A) and (B) are perspective views showing a coaxial electrical connector 1 (hereinafter referred to as "coaxial connector 1") according to an embodiment of the present invention together with a mating coaxial connector 2. FIG. 1B shows the state before the connector is fitted and connected, and FIG. 1B shows the state after the connector is fitted and connected. FIG. 2 is a perspective view showing each member of the coaxial connector 1 shown in FIG. 1 separated. 3(A) and 3(B) are cross-sectional views showing the cross sections of the coaxial connector 1 and the mating coaxial connectors 2 and 3 in FIG. FIG. 3B shows the state before the connector is mated and connected, and FIG. 3B shows the state after the connector is mated and connected. FIG. 4 is an enlarged cross-sectional view of a part of FIG. 3(A), and shows an enlarged connection portion between a relay body 10 and a lower shell member 20, which will be described later.

The coaxial connector 1 is a connector for relaying mating coaxial connectors 2 and 3 mounted on respective two circuit boards (for example, an antenna circuit board and a radio circuit board) arranged facing each other. Specifically, the coaxial connector 1 is fitted and connected from below with a mating coaxial connector 2 mounted on a circuit board P1 (see FIGS. By fitting and connecting the mating coaxial connector 3 mounted on the connector 3 (see 3(A) and 3(B)) from above, the mating coaxial connector 2 and the mating coaxial connector 3 are relayed.

As shown in Figures 1(A), (B) and 3(A), (B), the coaxial connector 1 has a relay 10 that extends in the vertical direction, i.e., in the direction of connection with mating coaxial connectors 2, 3, a lower shell member 20 provided at the lower end of the relay 10, and an upper shell member 30 provided at the upper end of the relay 10. In this embodiment, when it is not necessary to distinguish between the lower shell member 20 and the upper shell member 30, they will be collectively referred to as "shell members 20, 30" for ease of explanation.

As shown in FIGS. 3A and 3B, the relay body 10 is composed of a semi-rigid cable cut to a predetermined length, and includes a metal center conductor 11 extending in the vertical direction, and a center conductor 11 extending in the vertical direction. A dielectric 12 made of an electrically insulating material such as resin covers the outer circumferential surface of the dielectric 11 and holds the center conductor 11, and an outer conductor 13 made of metal covers the outer circumferential surface of the dielectric 12 and holds the dielectric 12. are doing.

As shown in FIG. 2, at both ends of the relay body 10 in the longitudinal direction (vertical direction), the dielectric 12 and the outer conductor 13 are cut at different positions in the vertical direction, and the center conductor 11 and the dielectric Each end of 12 is exposed. Specifically, the end of the dielectric 12 protrudes from the end face of the outer conductor 13, and the end of the center conductor 11 protrudes from the end face of the dielectric 12. The lower end of the center conductor 11 that protrudes from the lower end surface of the dielectric 12 forms an inner contact portion 11A for contacting with the mating coaxial connector 2, and the upper end of the center conductor 11 that protrudes from the upper end surface of the dielectric 12 forms an inner contact portion 11A for contacting the mating coaxial connector 2. , forming an inner contact portion 11B for contact with the mating coaxial connector 3. The inner contact portions 11A and 11B are pin-shaped male contact portions.

In this embodiment, the end face of the external conductor 13 is formed as a tapered surface that slopes upward and away from the tip of the central conductor 11 as it moves outward in the radial direction of the external conductor 13. Specifically, the lower end face 13A of the external conductor 13 is formed as a tapered surface that slopes upward as it moves outward in the radial direction of the external conductor 13 (see FIG. 4), and the upper end face 13B of the external conductor 13 is formed as a tapered surface that slopes downward as it moves outward in the radial direction of the external conductor 13 (see FIG. 2).

The lower shell member 20 is generally cylindrical with its axis extending vertically, and is made by cutting a cylindrical metal material. The lower shell member 20 has an attachment portion 21 at its upper part that is attached by being inserted onto the lower end of the relay 10, and a mating portion 22 at its lower part that can be mated with the mating coaxial connector 2.

The mounting portion 21 has a cylindrical shape, and has an inner diameter larger than the outer diameter of the outer conductor 13 of the relay body 10 as shown in FIG. 3(A). It has an extrapolation part 21A that is inserted into the outer part, and a positioning part 21B that is located below the extrapolation part 21A and has an inner diameter smaller than the outer diameter of the relay body 10. The attachment part 21 is attached to the lower end of the outer conductor 13 by fixing an outer insertion part 21A inserted to the lower end of the outer conductor 13 to the outer peripheral surface of the lower end.

Examples of methods for fixing the extrapolation portion 21A include welding, adhesive bonding, or plastic deformation in the radial direction. It can be attached to. Furthermore, examples of processing methods for plastically deforming the extrapolated portion 21A in the radial direction include punching and crimping. Here, punching means hitting the outer circumferential surface of the outer part 21A with a punch to partially deform it, thereby forming a protrusion projecting radially inward on the outer part 21A, and forming a protrusion on the outer conductor 13. This is a processing method in which it is fixed to the lower end of the Further, in the case of fixation due to plastic deformation in the radial direction, the lower end portion of the outer conductor 13 may or may not be deformed together with the outer insertion portion 21A.

As shown in FIG. 3A, the positioning portion 21B is fitted onto the lower end of the dielectric 12 that protrudes from the lower end of the outer conductor 13. As shown in FIG. The inner diameter of the positioning portion 21B is the same as or slightly larger than the outer diameter of the dielectric 12, and smaller than the inner diameter of the extrapolation portion 21A. Therefore, as shown in FIG. 4, the inner circumferential surface of the attachment part 21 has a step part 21C at the boundary between the extrapolation part 21A and the positioning part 21B. The step portion 21C has the same inclination angle as the lower end surface 13A of the outer conductor 13, and is formed as a tapered surface that slopes downward as it goes inward in the radial direction of the attachment portion 21. Therefore, the stepped portion 21C contacts the lower end surface 13A of the outer conductor 13 from below. In this embodiment, the stepped portion 21C as a tapered surface is formed along the tip shape of a processing tool (not shown) such as a drill when cutting the inner diameter portion of the attachment portion 21.

The fitting part 22 has a substantially cylindrical shape with an outer diameter larger than that of the mounting part 21, and includes a connecting part 22A connected to the positioning part 21B and a plurality of external contacts extending downward from the periphery of the lower end surface of the connecting part 22A. 22B. The connecting portion 22A has the same inner diameter as the positioning portion 21B, and is fitted onto the lower end of the dielectric 12. The plurality of external contact parts 22B are arranged at equal intervals in the circumferential direction of the fitting part 22, and form elastic pieces that can be elastically displaced in the radial direction of the fitting part 22. A contact protrusion 22B-1 that protrudes radially outward is formed at the lower end of the outer contact portion 22B, and the contact protrusion 22B-1 can contact the mating external conductor 40 of the mating coaxial connector 2. ing.

The space surrounded by the multiple outer contact portions 22B forms a receiving space 22C that can receive the support portion 52 (described later) of the mating coaxial connector 2 from below, and is formed with an inner diameter larger than the inner diameter of the connecting portion 22A. The inner contact portion 11A of the central conductor 11 is located at the center of this receiving space 22C.

The upper shell member 30 has the same shape as the lower shell member 20, and is attached to the upper end of the relay 10 in a state in which it is upside down relative to the lower shell member 20. The upper shell member 30 is given the same reference numerals as the respective parts of the lower shell member 20, but the explanation thereof will be omitted and "10" will be added.

The coaxial connector 1 is manufactured in the following manner. First, a sufficient length of a semi-rigid cable having the electrical characteristics required for the coaxial connector 1 is prepared in advance, and this semi-rigid cable is cut to a set length. Next, the dielectric 12 and the outer conductor 13 are cut off at both longitudinal ends of the cut semi-rigid cable to expose the center conductor 11 and the dielectric 12, thereby obtaining the relay body 10. Further, at this time, the lower end surface 13A and the upper end surface 13B of the outer conductor 13 are made into tapered surfaces by cutting, crushing, or the like.

Next, the mounting portion 21 of the lower shell member 20 is fitted onto the lower end of the relay body 10 from below. At this time, the lower shell member 20 is positioned by the stepped portion 21C coming into contact with the lower end surface 13A of the outer conductor 13, as shown in FIG. The lower shell member 20 is attached to the lower end of the relay body 10 by fixing the outer insertion portion 21A to the lower end of the outer conductor 13. Further, in the same manner as the lower shell member 20 is attached, the upper shell member 30 is attached to the upper end of the relay body 10. In this way, the shell members 20 and 30 are attached to each end of the relay body 10, thereby completing the coaxial connector 1.

As shown in FIG. 4, in this embodiment, the lower end surface 13A of the external conductor 13 and the step portion 21C of the lower shell member 20 are formed as tapered surfaces with the same inclination angle and are in contact with each other, so that no gap is formed in the vertical direction between the external conductor 13 and the lower shell member 20. Similarly, no gap is formed in the vertical direction between the external conductor 13 and the upper shell member 30. Therefore, when a signal is transmitted through the coaxial connector 1, the occurrence of impedance disturbances that occur when the above-mentioned gap exists is suppressed, making it easier to keep the impedance constant. As a result, the electrical characteristics of the coaxial connector 1 are improved.

In this embodiment, as described above, the relay 10 of the coaxial connector 1 is made by cutting a semi-rigid cable prepared in advance to a set length. Therefore, even if the dimensions of the coaxial connector 1 in the vertical direction are changed according to the size and shape of the electrical device, the relay 10 can be easily obtained by cutting the semi-rigid cable to a length according to the changed dimensions. In addition, even if the dimensions of the coaxial connector 1 in the vertical direction are changed, the shell members 20 and 30 can be used the same as before the change, so there is no need to newly design them. Therefore, in this embodiment, the coaxial connector 1 can be easily manufactured. In addition, since there is no need to newly design the relay 10 and the shell members 20 and 30, an increase in manufacturing costs can be suppressed. Therefore, the coaxial electrical connector 1 having a short relay 10 as shown in FIG. 5(A) and the coaxial electrical connector 1 having a long relay 10 as shown in FIG. 5(B) can also be easily and inexpensively manufactured. In addition, the semi-rigid cable may be a commercially available product, in which case the coaxial electrical connector 1 can be manufactured even more simply and inexpensively.

Next, the configuration of the mating coaxial connector 2 will be explained based on FIGS. 1(A) and 3(B) and FIGS. 3(A) and 3(B).

The mating coaxial connector 2 has a mating outer conductor 40 made of metal, a mating dielectric 50 made of an electrically insulating material such as resin that is housed and held in the mating outer conductor 40, and a mating central conductor 60 made of metal that is housed and held in the mating dielectric 50. The mating outer conductor 40, mating dielectric 50, and mating central conductor 60 are arranged concentrically.

The mating external conductor 40 has a substantially cylindrical shape with an axis extending in the vertical direction, and the space that opens upward is an outer receiving space that receives the fitting portion 22 of the lower shell member 20 of the coaxial connector 1 from above. 41. As shown in FIG. 3A, the mating external conductor 40 includes an annular bottom portion 42 extending at right angles to the axis, and a peripheral wall portion as a mating external contact portion that stands upward from the periphery of the bottom portion 42. 43, and an external connection portion 44 protruding from the bottom surface of the bottom portion 42.

A guide portion 43A is formed at the upper end of the peripheral wall portion 43 and gradually expands radially outward as it goes upward. 22 to the proper fitting position. Two external connecting portions 44 are provided extending in an arc shape along the periphery of the bottom surface of the bottom portion 42 (see the mating coaxial connector 3 shown in FIG. 1(A)). The external connection portion 44 is configured to come into contact with a ground circuit portion (not shown) of the circuit board P1 from above when the mating coaxial connector 2 is placed on the mounting surface of the circuit board P1 (see FIG. 3(A)).

The mating dielectric 50 has a cylindrical shape and has a base 51 held on the bottom 42 of the mating external conductor 40 and a support part 52 extending upward from the base 51, and has a mating central conductor in the internal space. It accommodates 60 people. The support portion 52 supports a mating internal contact portion 42, which will be described later, of the mating center conductor 60 from the outside in the radial direction.

The mating center conductor 60 includes a held part 61 held by the base 51 of the mating dielectric 50 , a plurality of mating internal contact parts 62 extending upward from the held part 61 , and a downward direction from the lower end of the held part 61 . It has an inner connecting portion 63 that protrudes toward. The plurality of mating internal contact portions 62 are arranged at regular intervals in the circumferential direction of the mating central conductor 60, and form elastic pieces that can be elastically displaced in the radial direction of the mating central conductor 60. In other words, the plurality of mating internal contact parts 62 constitute a female contact part.

The internal space surrounded by the plurality of mating internal contact parts 62 and opening upward forms a receiving space 64 for receiving the internal contact part 11A of the coaxial connector 1; It is formed with an inner diameter slightly smaller than the outer diameter of 11A. The inner connection portion 63 is configured to come into contact with the signal circuit portion (not shown) of the circuit board P1 from above when the mating coaxial connector 2 is placed on the mounting surface of the circuit board P1 (see FIG. 3(A)).

In this embodiment, the mating internal contact portion 62 is supported from the radially outward direction in contact with the inner peripheral surface of the support portion 52 of the mating dielectric 50 in the free state. Therefore, when the mating internal contact portion 62 comes into contact with the inner contact portion 11A of the coaxial connector 1 and is slightly elastically deformed radially outward in the connector mating state, it receives a reaction force from the support portion 52 in the radially inward direction. As a result, the contact pressure between the inner contact portion 11A and the mating internal contact portion 62 is increased, ensuring a good contact state. Note that the elastic deformation of the inner contact portion 11A in the radially outward direction is permitted by the support portion 52 itself being slightly elastically deformed.

The configuration of the mating coaxial connector 3 is exactly the same as that of the mating coaxial connector 2, so the same reference numerals are used for each part of the mating coaxial connector 2 and the explanation is omitted.

Next, the connector connection operation between the coaxial connector 1 and the mating coaxial connectors 2, 3 will be described. First, as shown in FIG. 3(A), the coaxial connector 1 is positioned above the mating coaxial connector 2 mounted on the circuit board P1, and the mating portion 22 of the lower shell member 20 of the coaxial connector 1 is made to face the mating coaxial connector 2. Next, the coaxial connector 1 is moved downward, and the mating portion 22 is mated with the mating coaxial connector 2 from above. Specifically, the outer contact portion 22B of the mating portion 22 enters the outer receiving space 41 of the mating coaxial connector 2, and is guided radially toward the normal mating position while sliding against the guide portion 43A. Then, when the outer contact portion 22B enters the annular space between the peripheral wall portion 43 of the mating outer conductor 40 and the support portion 52 of the mating dielectric 50, the contact protrusion 22B-1 of the outer contact portion 22B is pressed against the inner peripheral surface of the peripheral wall portion 43, and the outer contact portion 22B is elastically deformed radially inward. Even when the mating portion 22 is fully mated, the elastic deformation state of the outer contact portion 22B is maintained, and a contact state with contact pressure between the contact protrusion 22B-1 and the peripheral wall portion 43 is ensured. As a result, the lower shell member 20 and the mating outer conductor 40 are electrically conductive.

The inner contact portion 11A of the central conductor 11 of the coaxial connector 1 enters the internal space of the mating inner contact portion 62 from above, pushing the mating inner contact portion 62 radially outward, causing it to undergo slight elastic deformation. At this time, the mating inner contact portion 62 receives a reaction force directed radially inward from the support portion 52 of the mating dielectric 50. Therefore, the mating inner contact portion 62 comes into contact with the outer peripheral surface of the inner contact portion 11A with contact pressure, ensuring good contact. As a result, the central conductor 11 and the mating central conductor 60 are electrically conductive.

In this embodiment, the mating internal contact portion 62 is supported from the radially outward side in contact with the inner peripheral surface of the support portion 52 of the mating dielectric 50 in a free state. Alternatively, for example, when the mating internal contact portion 62 is in a free state, a slight radial gap may be formed between the mating internal contact portion 62 and the support portion 52. In this case, when the connector is connected, the mating internal contact portion 62 elastically deforms radially outward to come into contact with the inner peripheral surface of the support portion 52 and is supported by the support portion 52, and receives a reaction force from the support portion 52 in the radially inward direction.

The upper shell member 30 of the coaxial connector 1 is then mated with the mating coaxial connector 3 mounted on the circuit board P2. This mating connection operation is performed in the same manner as the mating connection operation between the lower shell member 20 and the mating coaxial connector 2 described above. When the upper shell member 30 and the mating coaxial connector 3 are mated, the upper shell member 30 and the mating outer conductor 40, and the center conductor 11 and the mating center conductor 60 are each electrically conductive with each other. In this way, the coaxial connector 1 and the mating coaxial connectors 2 and 3 are connected, completing the connector connection operation.

In this embodiment, only one mating coaxial connector 2, 3 is mounted on each of the circuit boards P1, P2, and this mating coaxial connector 2, 3 is relayed by the coaxial connector 1, but instead, for example, it is possible to mount multiple mating coaxial connectors 2, 3 on the circuit boards P1, P2, and relay each pair of the mating coaxial connector 2 and the mating coaxial connector 3 by the coaxial connector 1. In that case, when connecting the connectors, the coaxial connector 1 is connected to each of the multiple mating coaxial connectors 2 arranged on the circuit board P1, and then the multiple mating coaxial connectors 3 arranged on the circuit board P2 are simultaneously connected to the corresponding coaxial connectors 1.

In this embodiment, after the coaxial connector 1 is connected to the mating coaxial connector 2 mounted on the circuit board P1, the mating coaxial connector 3 mounted on the circuit board P2 is connected to the coaxial connector 1. The order is not limited to this, for example, after connecting the coaxial connector 1 to the mating coaxial connector 3 mounted on the circuit board P2, the mating coaxial connector 2 mounted on the circuit board P1 is connected to the coaxial connector 1. Good too.

1. Coaxial connector (coaxial electrical connector)
2 Mating coaxial connector 3 Mating coaxial connector 10 Relay body 20 Lower shell member (shell member)
30 Upper shell member (shell member)

Claims (3)

A coaxial electrical connector in which mating coaxial connectors are connected one by one from opposite sides and relaying the mating coaxial connectors,
a relay body extending in the connection direction with the mating coaxial connector;
a shell member provided at each end of the relay body in the connection direction and capable of fitting into the mating coaxial connector;
A coaxial electrical connector, wherein the relay body is a semi-rigid cable. the shell member has a cylindrical shape with the connection direction being the axial direction, and has a fitting portion that can be fitted into the mating coaxial connector, and an attachment portion that is attached in a state of being inserted onto an end portion of the relay body,
2. The coaxial electrical connector of claim 1, wherein the mounting portion is attached to the end portion by welding, gluing with an adhesive, or by plastic deformation in a radial direction. The mounting part includes an outer part formed with an inner diameter larger than the outer diameter of the relay body and inserted onto the end of the relay body, and a positioning part formed with an inner diameter smaller than the outer diameter of the relay body. have,
The inner peripheral surface of the attachment part has a stepped part at a boundary position between the extrapolation part and the positioning part,
The relay body is positioned by an end surface of an outer conductor of the relay body abutting the step portion in the connection direction,
The stepped portion is formed as a tapered surface whose contact surface that contacts the end surface of the external conductor is inclined with respect to the connection direction,
3. The coaxial electrical connector according to claim 1, wherein the end surface of the outer conductor is formed as a tapered surface that can come into contact with the abutment surface.