CN211238575U - Substrate mounting type coaxial connector - Google Patents

Abstract

A board-mounted coaxial connector includes: an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal, and mounted on the substrate via the internal terminal and the external terminal, the internal terminal including: a 1 st terminal part protruding to be inserted into a terminal of a counterpart connector; and a 2 nd terminal portion which extends from a base end portion of the 1 st terminal portion in a direction intersecting a protruding direction of the 1 st terminal portion and is attached to the substrate, wherein the 1 st terminal portion has a cylindrical portion extending in a cylindrical shape from the base end portion, and an outer diameter of the base end portion is set to be equal to or smaller than an outer diameter of the cylindrical portion except for the base end portion.

Description

Substrate mounting type coaxial connector

Technical Field

The utility model relates to a base plate installation type coaxial connector.

Background

Conventionally, there is known a board mount type coaxial connector used in a state of being mounted on a board (for example, see patent document 1).

The board mount type coaxial connector of patent document 1 includes: an inner terminal having a center conductor as a contact pin; an external terminal having a cylindrical external conductor disposed around the center conductor; and an insulating member disposed between the internal terminal and the external terminal. The coaxial connector is mounted on a substrate via an internal terminal and an external terminal. When a coaxial connector mounted on a board is connected to a connector on the other side, the center conductor of the inner terminal and the outer conductor of the outer terminal are fitted to the corresponding terminals of the connector on the other side.

In such a configuration, the center conductor of the inner terminal has a cylindrical shape formed by deep drawing, and a flange portion (diameter-enlarged portion) that is expanded in the radial direction is formed at the base end portion thereof. By disposing the insulating member so as to surround the flange portion, the flange portion functions as a retaining member for the internal terminal.

Patent document 1 Japanese patent No. 3161281

In recent years, multilayering of a substrate on which a coaxial connector is mounted has been advanced. A layer formed of a plurality of electrodes (ground electrode and signal electrode) is provided inside such a substrate. As the number of layers of the substrate increases, the distance between the layers of the plurality of electrodes and the distance between the terminal of the coaxial connector and the layer of the electrode also decrease. In particular, when the distance between the terminal of the coaxial connector and the electrode layer is short, capacitive coupling occurs between the terminal and the electrode layer, which may deteriorate the electrical characteristics of the mounting board. It is desired to perform a study to suppress deterioration of electrical characteristics even when the coaxial connector is mounted on a substrate when the design of the substrate cannot be changed.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to solve the above-described problems and provide a board mount type coaxial connector capable of suppressing deterioration of electrical characteristics.

In order to achieve the above object, the board mount type coaxial connector of the present invention includes: an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal, and mounted on a substrate via the internal terminal and the external terminal, wherein the internal terminal includes: a 1 st terminal part protruding to be inserted into a terminal of a counterpart connector; and a 2 nd terminal portion which extends from a base end portion of the 1 st terminal portion in a direction intersecting a protruding direction of the 1 st terminal portion and is attached to the substrate, wherein the 1 st terminal portion has a cylindrical portion extending in a cylindrical shape from the base end portion, and an outer diameter of the base end portion is set to be smaller than or equal to an outer diameter of the cylindrical portion except for the base end portion.

Further, an outer diameter of the base end portion of the 1 st terminal portion may be set to be the same as an outer diameter of the cylindrical portion excluding the base end portion.

Further, the 1 st terminal portion may be formed of a single plate-like member integrated with the 2 nd terminal portion, and the cylindrical portion of the 1 st terminal portion may include: the first and second portions are disposed so that distal ends of the first and second portions 1 and 2 are opposed to each other.

Further, the cylindrical portion of the 1 st terminal portion may have a through hole in a side surface thereof, and the insulating member may be disposed so as to pass through the through hole.

Further, the present invention provides a method of manufacturing a board mount coaxial connector, including: an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal, and mounted on a substrate via the internal terminal and the external terminal, wherein the method of manufacturing a substrate-mounted coaxial connector includes: preparing the internal terminal; preparing the external terminal; a step of holding the internal terminal and the external terminal at a distance from each other; and a step of insert-molding the insulating member between the internal terminal and the external terminal, the step of preparing the internal terminal including: a step of preparing a plate-like member having a 1 st terminal portion extending in a plate-like shape in a 1 st direction and a 2 nd terminal portion branched from a side of a central portion of the 1 st terminal portion and extending in a plate-like shape in a 2 nd direction orthogonal to the 1 st direction; bending the 1 st portion on one side and the 2 nd portion on the other side so that ends thereof face each other with reference to a center portion of the 1 st terminal portion in the 1 st direction; and bending the 1 st terminal portion or the 2 nd terminal portion at a connection portion between the 1 st terminal portion and the 2 nd terminal portion.

According to the substrate mounting type coaxial connector and the manufacturing method thereof of the present invention, deterioration of electrical characteristics can be suppressed.

Drawings

Fig. 1 is a perspective view showing a coaxial connector according to embodiment 1 (a view showing an insulating member with a solid line).

Fig. 2 is a perspective view showing a coaxial connector according to embodiment 1 (a view showing an insulating member by a broken line).

Fig. 3 is a schematic view of a state in which the coaxial connector is mounted on the substrate.

Fig. 4A is a side view of the internal terminal.

Fig. 4B is a rear view of the internal terminal.

Fig. 5A is a perspective view for explaining an example of a method of forming the internal terminal.

Fig. 5B is a perspective view for explaining an example of a method of forming the internal terminal.

Fig. 5C is a perspective view for explaining an example of a method of forming the internal terminal.

Fig. 6A is a perspective view showing an internal terminal of modification 1.

Fig. 6B is a perspective view showing an internal terminal of modification 1.

Fig. 6C is a perspective view showing an internal terminal of modification 1.

Fig. 7 is a perspective view showing an internal terminal according to modification 2.

Fig. 8A is a perspective view showing an internal terminal of modification 3.

Fig. 8B is a side view showing an internal terminal according to modification 3.

Fig. 9 is a perspective view showing an internal terminal used in the coaxial connector according to embodiment 2.

Fig. 10A is a perspective view for explaining an example of a method of forming the internal terminal shown in fig. 9.

Fig. 10B is a perspective view for explaining an example of a method of forming the internal terminal shown in fig. 9.

Fig. 10C is a perspective view for explaining an example of a method of forming the internal terminal shown in fig. 9.

Fig. 10D is a perspective view for explaining an example of a method of forming the internal terminal shown in fig. 9.

Detailed Description

According to the 1 st aspect of the present invention, there is provided a board mount type coaxial connector comprising an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal, and mounted on a board via the internal terminal and the external terminal, wherein the internal terminal comprises: a 1 st terminal part protruding to be inserted into a terminal of a counterpart connector; and a 2 nd terminal portion which extends from a base end portion of the 1 st terminal portion in a direction intersecting a protruding direction of the 1 st terminal portion and is attached to the substrate, wherein the 1 st terminal portion has a cylindrical portion extending in a cylindrical shape from the base end portion, and an outer diameter of the base end portion is set to be smaller than or equal to an outer diameter of the cylindrical portion excluding the base end portion.

According to such a configuration, since the base end portion of the 1 st terminal portion is not expanded, the facing area of the 1 st terminal portion facing the substrate is smaller than that in the case where the flange portion is provided by expanding the base end portion in the radial direction. This can suppress capacitive coupling between the 1 st terminal portion and the electrode of the substrate inner layer, and can suppress deterioration of the electrical characteristics of the substrate-mounted coaxial connector.

According to a second aspect of the present invention, there is provided the substrate-mounted coaxial connector according to the first aspect 1, wherein an outer diameter of the base end portion of the 1 st terminal portion is set to a length equal to an outer diameter of the cylindrical portion excluding the base end portion. With this configuration, the 1 st terminal portion can be formed easily by making the cylindrical portion of the 1 st terminal portion straight.

According to a 3 rd aspect of the present invention, there is provided the board mount coaxial connector according to the 1 st or 2 nd aspect, wherein the 1 st terminal portion is formed of one plate-like member integrated with the 2 nd terminal portion, and the cylindrical portion of the 1 st terminal portion includes: the first and second portions are arranged such that the 1 st portion and the 2 nd portion are disposed to face each other at their ends. According to this configuration, the 1 st terminal portion and the 2 nd terminal portion are formed by one plate-like member, and the internal terminal can be easily formed. Further, by forming the cylindrical portion of the 1 st terminal portion by dividing it into the 1 st portion and the 2 nd portion, the 1 st portion and the 2 nd portion can be formed only by bending the plate-like member, and the 1 st terminal portion can be formed easily.

According to the 4 th aspect of the present invention, there is provided the board mount type coaxial connector according to any one of the 1 st to 3 rd aspects, wherein the cylindrical portion of the 1 st terminal portion has a through hole in a side surface thereof, and the insulating member is disposed so as to pass through the through hole. According to such a configuration, by disposing the insulating member in the through hole, the 1 st terminal portion can be firmly held, and the strength of the 1 st terminal portion can be enhanced.

According to the 5 th aspect of the present invention, there is provided a method of manufacturing a board mounted coaxial connector which includes an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal and which is mounted on a board via the internal terminal and the external terminal, the method comprising: preparing the internal terminal; preparing the external terminal; a step of holding the internal terminal and the external terminal at a distance from each other; and a step of insert-molding the insulating member between the internal terminal and the external terminal, the step of preparing the internal terminal including: a step of preparing one plate-like member having a 1 st terminal portion extending in a plate-like shape in a 1 st direction and a 2 nd terminal portion branched from a side of a central portion of the 1 st terminal portion and extending in a plate-like shape in a 2 nd direction orthogonal to the 1 st direction; bending the 1 st portion on one side and the 2 nd portion on the other side so that ends thereof face each other with reference to a center portion of the 1 st terminal portion in the 1 st direction; and bending the 1 st terminal portion or the 2 nd terminal portion at a connection portion between the 1 st terminal portion and the 2 nd terminal portion.

According to such a method, the 1 st terminal portion is formed in a shape in which the base end portion is not expanded, so that an opposing area of the 1 st terminal portion opposing the substrate is smaller than that in a form in which the base end portion is expanded. This can suppress capacitive coupling between the 1 st terminal portion and the electrode of the substrate inner layer, and can suppress deterioration of the electrical characteristics of the substrate-mounted coaxial connector. In addition, the 1 st terminal portion and the 2 nd terminal portion are formed by one plate-shaped member, so that the internal terminal can be easily formed. Further, the 1 st terminal portion can be formed only by bending the 1 st and 2 nd portions, and therefore, the 1 st terminal portion can be formed easily.

According to the 6 th aspect of the present invention, there is provided the method for manufacturing a board-mounted coaxial connector according to the 5 th aspect, wherein the step of preparing the one plate-shaped member includes: the step of preparing the plate-like member having a through hole formed in the 1 st terminal portion, and the step of forming the insulating member by insert molding includes the step of disposing the insulating member in the through hole of the 1 st terminal portion. According to this method, by disposing the insulating member in the through hole, the 1 st terminal portion can be firmly held by the insulating member.

Hereinafter, an exemplary embodiment of a board mount coaxial connector and a method of manufacturing the same according to the present invention will be described with reference to the drawings. The present invention is not limited to the specific configuration of the following embodiments, and the configuration based on the same technical idea is included in the present invention.

(embodiment mode 1)

Fig. 1 and 2 are perspective views showing a board-mounted coaxial connector (hereinafter referred to as a coaxial connector) 2 according to embodiment 1. The coaxial connector 2 shown in fig. 1 and 2 mainly includes an inner terminal 4, an outer terminal 6, and an insulating member 8. The insulating member 8 is shown by a solid line in fig. 1, and the insulating member 8 is shown by a broken line in fig. 2.

In the coaxial connector 2, the back sides of the internal terminal 4 and the external terminal 6 are mounted on a substrate (not shown), and the front sides of the internal terminal 4 and the external terminal 6 are connected to a counterpart connector (not shown). When the coaxial connector 2 is connected to the mating connector, the internal terminal 4 and the external terminal 6 are fitted to the respective terminals of the mating connector.

As shown in fig. 1 and 2, the inner terminal 4 includes a center conductor 10 and a mounting portion 12. The center conductor 10 is a terminal (1 st terminal portion) for electrically connecting the internal terminal 4 to the counterpart connector, and the mounting portion 12 is a terminal (2 nd terminal portion) for mounting the internal terminal 4 on the board and electrically connecting the same to the board.

The center conductor 10 is a member that projects in the a direction (insertion direction) to be inserted into a terminal of a counterpart connector. The center conductor 10 has a cylindrical shape (cylindrical shape in embodiment 1) extending cylindrically in the a direction. A through hole 14 penetrating in the a direction is formed in the center portion of the center conductor 10.

As shown in fig. 1 and 2, the center conductor 10 has a pin shape that can be inserted into a socket-shaped terminal (not shown) of the mating connector. The pin shape has a contact surface at an outer peripheral portion and the socket shape has a contact surface at an inner peripheral portion.

The mounting portion 12 is a plate-shaped member extending in the B direction from the base end portion 10a (fig. 2) of the central conductor 10. The B direction of embodiment 1 is orthogonal to the a direction. The mounting portion 12 is soldered and mounted to the substrate.

The external terminal 6 includes an external conductor 16 and a mounting portion 18. The external conductor 16 is a terminal (3 rd terminal portion) for electrically connecting the external terminal 6 to the counterpart connector, and the mounting portion 18 is a terminal (4 th terminal portion) for mounting the external terminal 6 on the board and electrically connecting the same. The center conductor 10 of the inner terminal 4 is disposed inside the outer conductor 16.

The outer conductor 16 is configured as a cylindrical (cylindrical in embodiment 1) member extending in the a direction, similarly to the above-described central conductor 10, for fitting to the terminal of the counterpart connector. A groove 16a for fitting the terminal of the mating connector is formed in the outer peripheral surface of the outer conductor 16.

The mounting portion 18 is a plate-shaped member extending laterally from the base end portion 16b (fig. 2) of the external conductor 16. The mounting portion 18 is soldered and mounted to the substrate. The mounting portion 18 is provided at 3 positions in embodiment 1.

The insulating member 8 is an insulating member disposed between the internal terminal 4 and the external terminal 6 to electrically insulate the internal terminal 4 from the external terminal 6. The insulating member 8 is made of, for example, resin.

As an example of a method of manufacturing the coaxial connector 2 having the above-described structure, first, the internal terminal 4 and the external terminal 6 are prepared separately. Specifically, the internal terminal 4 and the external terminal 6 having the shapes shown in fig. 1 and 2 are prepared. The internal terminal 4 and the external terminal 6 can be formed by processing a single metal plate, for example, by plating the surface of a copper alloy material with nickel or gold. The method for forming the internal terminal 4 will be described later in detail.

Thereafter, the internal terminal 4 and the external terminal 6 are held in a state of being spaced apart from each other using a mold or the like. In this state, a resin as a raw material of the insulating member 8 is insert-molded between the internal terminal 4 and the external terminal 6 to form the insulating member 8. Thereby, the coaxial connector 2 shown in fig. 1 and 2 can be manufactured.

Fig. 3 is a schematic view of a state in which the coaxial connector 2 having the above-described structure is mounted on a substrate.

Fig. 3 schematically shows the center conductor 10 of the inner terminal 4 in the coaxial connector 2, and the front-side ground electrode 22 and the back-side ground electrode 24 of the substrate 20. In the state shown in fig. 3, when a high-frequency signal flows through the coaxial connector 2, capacitive coupling occurs between the center conductor 10 and the front-side ground electrode 22 (arrow C) and between the center conductor 10 and the back-side ground electrode 24 (arrow D). In particular, when the capacitance generated between the center conductor 10 and the back-side ground electrode 24 shown by the arrow D becomes large, the electrical characteristics are often deteriorated.

In order to suppress such deterioration of the electrical characteristics, in the coaxial connector 2 according to embodiment 1, the shape of the central conductor 10 of the inner terminal 4 is studied. Specifically, the description will be made with reference to fig. 4A and 4B.

Fig. 4A is a side view of the internal terminal 4, and fig. 4B is a rear view of the internal terminal 4. As shown in fig. 4A and 4B, the center conductor 10 of embodiment 1 has a substantially cylindrical shape, and includes: a proximal end portion 10a to which the attachment portion 12 is connected, and a cylindrical portion 10b extending from the proximal end portion 10a in a cylindrical shape (cylindrical shape in embodiment 1) in the insertion direction a. The cylindrical portion 10b constitutes a terminal portion 10c of the center conductor 10.

In embodiment 1, particularly, the outer periphery is linearly configured from the proximal end portion 10a to the cylindrical portion 10b, and the outer diameter (diameter) D1 of the proximal end portion 10a and the outer diameter D2 of the cylindrical portion 10b are set to the same length. Thus, no flange portion extending in the radial direction is formed at the base end portion 10a of the center conductor 10. In embodiment 1, the width of the mounting portion 12 is also set to the same length as the width (outer diameter D1) of the proximal end portion 10a.

In contrast to the configuration of embodiment 1 described above, a configuration in which a flange portion having an expanded diameter is formed at the proximal end portion of the center conductor may be considered, as in the coaxial connector of patent document 1. In this aspect, a flange portion having an enlarged area is formed at a position closest to the substrate in the coaxial connector. Therefore, the facing area of the center conductor facing the substrate 20 is increased, and the capacitance generated between the center conductor and the back-side ground electrode 24 is increased, which may deteriorate the electrical characteristics of the coaxial connector.

In the coaxial connector 2 according to embodiment 1, as described above, the flange portion is not formed at the base end portion 10a of the center conductor 10, and the outer peripheral portion is linear in the a direction as the insertion direction. With such a configuration, since the facing area of the center conductor 10 and the substrate 20 can be reduced, the capacitance generated between the center conductor 10 and the back-side ground electrode 24 can be reduced, and deterioration of the electrical characteristics of the coaxial connector 2 can be suppressed.

An example of a method of forming the internal terminal 4 having the above-described structure will be described with reference to fig. 5A to 5C.

First, one plate-like member 26 is prepared (step S1). Specifically, as shown in fig. 5A, a conductive plate-like member 26 having the 1 st terminal portion 28 and the 2 nd terminal portion 30 integrally therewith is prepared.

As shown in fig. 5A, the 1 st terminal portion 28 is a plate-like portion extending in the 1 st direction E. The 2 nd terminal portion 30 is a plate-like portion extending in the 2 nd direction F orthogonal to the 1 st direction E. The 1 st terminal portion 28 and the 2 nd terminal portion 30 are integrally formed to extend along the same plane. As shown in fig. 5A, the 1 st terminal portion 28 and the 2 nd terminal portion 30 are connected to each other by a connection line 31. The 2 nd terminal portion 30 is branched laterally from the central portion of the 1 st terminal portion 28 in the E direction.

Next, the 1 st terminal portion 28 is bent (step S2). Specifically, as shown in fig. 5A, the 1 st portion 28a on one side and the 2 nd portion 28b on the other side are bent with reference to the center line 29, which is the center position of the 1 st terminal portion 28 in the 1 st direction E.

As shown in FIG. 5B, the 1 st segment 28a curves in the circumferential direction R1, and the 2 nd segment 28B curves in the circumferential direction R2 opposite the circumferential direction R1. The end 28c of the 1 st segment 28a and the end 28d of the 2 nd segment 28b are disposed to face each other. The ends 28c and 28d may or may not be in contact.

The 1 st terminal portion 28 thus bent is formed in a cylindrical shape extending linearly in the axial direction without unevenness in the outer peripheral portion.

Next, the 1 st terminal portion 28 is bent (step S3). Specifically, the 1 st terminal portion 28 is bent by about 90 degrees with reference to the connection line 31 as a connection portion between the 1 st terminal portion 28 and the 2 nd terminal portion 30 shown in fig. 5B.

When the 1 st terminal portion 28 is bent, it has a shape as shown in fig. 5C. In the plate-like member 26 shown in fig. 5C, the 1 st terminal portion 28 constitutes the central conductor 10, and the 2 nd terminal portion 30 constitutes the inner terminal 4 of the mounting portion 12.

According to the method of forming the inner terminal 4, the center conductor 10 can be formed in a cylindrical shape in which the outer peripheral portion having no flange portion at the base end portion is formed linearly. Therefore, compared to the form having the flange portion at the base end portion of the center conductor, the facing area of the substrate 20 facing the back side ground electrode 24 can be made smaller, the capacitance generated between the substrate and the back side ground electrode 24 can be suppressed, and the deterioration of the electrical characteristics of the coaxial connector 2 can be suppressed.

Since deterioration of the electrical characteristics of the coaxial connector 2 can be suppressed in this way, even when a plurality of electrode layers are provided without reducing the number of electrode layers in the inner layer of the substrate 20, the capacitance coupling between the center conductor 10 of the inner terminal 4 and the electrode of the substrate 20 can be reduced to obtain desired electrical characteristics. This can reduce the design constraint of the substrate 20.

Furthermore, according to the above method, the center conductor 10 and the mounting portion 12 can be formed by one plate-like member 26, and therefore the inner terminal 4 can be formed by a simple method. Further, the center conductor 10 can be formed only by bending the 1 st and 2 nd portions 28a and 28b of the 1 st terminal portion 28, and therefore the 1 st terminal portion 28 can be formed by a simple method.

The shape of the inner terminal 4 used in the coaxial connector 2 according to embodiment 1 has been described in detail above, but various modifications are possible. A specific modification will be described with reference to fig. 6A to 10D. In the following modifications, differences from embodiment 1 will be mainly described, and redundant description will not be given. The same or equivalent structures will be described with the same reference numerals.

(modification 1)

Fig. 6A to 6C show an internal terminal 40 of modification 1. The inner terminal 40 shown in fig. 6A to 6C includes a center conductor 42 and a mounting portion 43.

As with the internal terminal 4 of embodiment 1, the base end portion 42a of the center conductor 42 does not have a flange portion that expands in the radial direction, and is set to an outer diameter that is the same as the outer diameter of the cylindrical portion 42b. Accordingly, since the facing area of the center conductor 42 facing the substrate 20 can be reduced, deterioration of the electrical characteristics of the coaxial connector using the inner terminal 40 can be suppressed, as in the coaxial connector 2 of embodiment 1.

In the center conductor 42 of modification 1, the distal end portion 42c at a position facing the proximal end portion 42a is tapered so as to be narrower in the radial direction from the cylindrical portion 42b. That is, the outer diameter of the distal end portion 42c is smaller than the outer diameter of the tube portion 42b, and is configured to be gradually smaller toward the distal end side. By making the distal end portion 42c tapered so as to have a narrow distal end side, the insertion can be easily performed when the terminal of the mating connector is inserted.

In the center conductor 42 of modification 1, a notch 44 is further provided at the base end portion 42a. The insulating member 8 (fig. 1) is disposed in the notch 44. By disposing the insulating member 8 in the notch 44, the center conductor 42 can be firmly fixed by the insulating member 8. By providing the notch 44 in this manner, even when the flange portion is not provided at the base end portion 42a of the center conductor 42 and the stopper function by the insulating member 8 is not provided, the strength of the center conductor 42 can be enhanced.

In order to form the internal terminal 40 as shown in fig. 6A to 6C, a structure in which the notch 44 is formed in advance in the plate-like member 26 shown in fig. 5A may be used, and the same method as that shown in fig. 5A to 5C may be performed.

(modification 2)

Next, the internal terminal 50 of modification 2 is shown in fig. 7. The inner terminal 50 shown in fig. 7 includes a center conductor 52 and a mounting portion 43. The central conductor 52 includes a base end portion 52a, a cylindrical portion 42b, and a distal end portion 42c.

The internal terminal 50 shown in fig. 7 is different from the internal terminal 40 of modification 1 in that a notch 55 is formed in addition to the notch 44 in the base end portion 52a of the central conductor 52.

Such a notch 55 is provided, and the insulating member 8 is disposed in the notch 55. This allows the insulating member 8 to more firmly fix the center conductor 52, thereby enhancing the strength of the center conductor 52.

In order to form the internal terminal 50 as shown in fig. 7, the plate-like member 26 shown in fig. 5A may be formed with the notch 44 and the notch 55 in advance, and the same method as that shown in fig. 5A to 5C may be performed.

(modification 3)

Next, the internal terminal 60 of modification 3 is shown in fig. 8A and 8B. The inner terminal 60 shown in fig. 8A and 8B includes a center conductor 62 and a mounting portion 43. The center conductor 62 includes a base end portion 62a, a cylindrical portion 62b, and a distal end portion 42c.

The internal terminal 60 shown in fig. 8A and 8B is different from the internal terminal 40 of modification 1 in that a through hole 64 is formed in a side surface of the cylindrical portion 62B of the center conductor 62.

The insulating member 8 (not shown) is disposed in the through hole 64. The insulating member 8 is disposed so as to surround the outer peripheral portion and the inner peripheral portion of the center conductor 62 through the through hole 64, and is disposed so as not to expose the through hole 64 in a completed state of the coaxial connector 2 as shown in fig. 1.

By disposing the insulating member 8 in the through hole 64 in this manner, a wedge-shaped structure can be achieved, and the center conductor 62 can be fixed more firmly. Further, the insulating member 8 suppresses the central conductor 62 from coming off and rotating, thereby suppressing deterioration of the electrical characteristics of the coaxial connector 2. Further, since the directionality of the central conductor 62 and the mounting portion 43 is uniquely determined by the insulating member 8 and does not move, the electrical/mechanical performance is not deteriorated due to the rotation of the central conductor 62 when the coaxial connector 2 is mounted on the substrate 20.

In order to form the internal terminal 60 shown in fig. 8A and 8B, the plate-like member 26 shown in fig. 5A may be formed with the notch 44 and the through hole 64 in advance, and the same method as that shown in fig. 5A to 5C may be performed.

(embodiment mode 2)

An internal terminal used in the coaxial connector according to embodiment 2 of the present invention will be described. In embodiment 2, the difference from embodiment 1 will be mainly described. In embodiment 2, the same or equivalent configurations as those in embodiment 1 will be described with the same reference numerals. In embodiment 2, description overlapping with embodiment 1 is omitted.

In embodiment 1, the internal terminal 4 is formed by bending, but this is not the case. Embodiment 2 is different from embodiment 1 in that an internal terminal is formed by deep drawing.

The internal terminal 70 of embodiment 2 is shown in fig. 9. The inner terminal 70 shown in fig. 9 includes a center conductor 72 and a mounting portion 74.

The center conductor 72 is formed in a substantially cylindrical shape, and includes a base end portion 72a, a cylindrical portion 72b, and a distal end portion 72c.

While the through-hole 14 is formed through the center of the center conductor 10 in embodiment 1, the through-hole is not formed and is closed in embodiment 2, and the terminal portion 72c is formed in a dome shape. A through hole 76 that opens in a rectangular shape is formed in a side surface of the tube portion 72b.

The internal terminal 70 shown in fig. 9 can be formed by deep drawing one plate-like member 80 as shown in fig. 10A.

Specifically, the plate-like member 80 shown in fig. 10A includes a 1 st plate portion 82 and a 2 nd plate portion 84. The width D3 of the 1 st plate portion 82 is constant. The 2 nd plate portion 84 continuous from the 1 st plate portion 82 includes: a base end portion 84a formed to increase in width D3 to a width D4, a central portion 84b extending constantly from the base end portion 84a with a width D4, and a tip end portion 84c smoothly narrowing from the central portion 84b toward the tip end.

In order to form the internal terminal 70, the 2 nd plate portion 84 having a width larger than that of the 1 st plate portion 82 is subjected to deep drawing using a punch or the like. Thereby, an intermediate 86 shown in fig. 10B is formed.

The intermediate body 86 has a cylindrical portion 88 formed in the 2 nd plate portion 84 so as to protrude in the a direction orthogonal to the width direction. Since the cylindrical portion 88 is formed by deep drawing, a through hole penetrating the center portion is not formed.

In the 2 nd plate portion 84 shown in fig. 10B, a flange portion 89 having a diameter larger than the outer diameter of the cylindrical portion 88 is formed at the base end portion. In order to form the cylindrical portion 88 by deep drawing, an enlarged diameter portion having a diameter enlarged like the flange portion 89 is required.

Next, a side surface of the cylindrical portion 88 of the intermediate body 86 shown in fig. 10B is subjected to a cutting process. Thereby, the through-hole 90 is formed as shown in fig. 10C.

Next, in the intermediate body 86 shown in fig. 10C, the flange portion 89 is cut. Thereby, the internal terminal 70 (fig. 9) as shown in fig. 10D can be formed. In the internal terminal 70 shown in fig. 10D, the cylindrical portion 88 corresponds to the central conductor 72, and the 1 st plate portion 82 corresponds to the mounting portion 74.

In the internal terminal 70 shown in fig. 9 and 10D, the base end portion 72a of the center conductor 72 does not have a flange portion that expands in the radial direction, and is set to the same outer diameter as the cylindrical portion 72b. With such a configuration, similarly to the internal terminal 4 of embodiment 1, deterioration of the electrical characteristics of the coaxial connector using the internal terminal 70 can be suppressed.

In the case of forming the internal terminal 70 according to embodiment 2 by the above-described method, it may be difficult to form the other portions of the intermediate body 86 in the cutting step of forming the through hole 90 or the cutting step of cutting the flange portion 89. In contrast to the method of forming the internal terminal 70 by deep drawing, the method of forming the internal terminal 4 by bending as in embodiment 1 does not require a step such as cutting or cutting. Therefore, the internal terminals 4 can be formed with high accuracy and simply.

The present invention has been described above by referring to the above embodiments 1 and 2 and the modification, but the present invention is not limited to the above embodiments 1 and 2 and the modification. For example, in embodiment 1, a case has been described in which the outer diameter of the base end portion 10a of the center conductor 10 is the same as the outer diameter of the cylindrical portion 10b excluding the base end portion 10a, but the present invention is not limited to this case, and may be a length shorter than the outer diameter of the cylindrical portion 10b. Even in such a case, since the facing area of the center conductor 10 and the substrate 20 can be reduced, deterioration of the electrical characteristics of the coaxial connector 2 can be suppressed. In this way, if the outer diameter of the proximal end portion 10a is set to be equal to or smaller than the outer diameter of the cylindrical portion 10b excluding the proximal end portion 10a, deterioration of the electrical characteristics of the coaxial connector 2 can be suppressed.

The "cylindrical shape" in the present specification includes not only a completely cylindrical shape but also a cylindrical shape in which the outer diameter does not change constantly, and a shape (substantially cylindrical shape, nearly cylindrical shape, substantially cylindrical shape, etc.) in which irregularities, notches, protrusions, etc. are provided in the cylindrical shape. The "outer diameter" in the present specification means the length of the longest portion in a cross section perpendicular to the protruding direction (insertion direction a) of the center conductor 10. The term "cylindrical shape" as used herein includes not only a complete cylindrical shape but also a cylindrical shape having an outer diameter that does not change constantly, and a shape (substantially cylindrical shape, approximately cylindrical shape, etc.) having a cylindrical shape with irregularities, notches, protrusions, etc. provided thereon.

In embodiment 1, a case where the internal terminal 4 is formed by bending one plate-like member 26 has been described, but the present invention is not limited to this case. The internal terminal 4 may be formed by performing a process other than bending such as deep drawing on a plurality of members. Further, by bending one plate-shaped member 26 to form the internal terminal 4, the internal terminal 4 can be formed more accurately and easily.

In embodiment 1, as described with reference to fig. 5B and 5C, the case where the 1 st terminal portion 28 is bent with respect to the 2 nd terminal portion 30 in the plate-like member 26 is described, but the present invention is not limited to this case. Instead of the 1 st terminal portion 28, the 2 nd terminal portion 30 may be bent with respect to the 1 st terminal portion 28. That is, either the 1 st terminal portion 28 or the 2 nd terminal portion 30 may be bent.

In modification 3, the case where the through hole 64 is provided in the center conductor 62 to function as the stopper prevention means has been described, but the present invention is not limited to this case. For example, the insulating member 8 may be disposed by providing a protrusion or a groove on a side surface of the central conductor 62, thereby functioning as a stopper prevention mechanism. Since the thickness of the center conductor 62 is relatively small, it is easier to process the through-hole 64 instead of the projection or the groove.

The present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, but various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the present disclosure as set forth in the appended claims. In addition, changes in the combination and order of elements in each embodiment may be made without departing from the scope and spirit of the disclosure.

In addition, any of the various embodiments and modifications described above or modifications may be appropriately combined to provide the respective effects.

Industrial applicability of the invention

The present invention can be applied to any substrate-mounted coaxial connector and its manufacturing method.

Description of the reference numerals

A coaxial connector (substrate mounting type coaxial connector); an internal terminal; an external terminal; an insulative member; 10.. a center conductor (1 st terminal portion); a proximal end portion; a barrel portion; a tip portion; a mounting portion (2 nd terminal portion); a through hole; an outer conductor (3 rd terminal portion); a slot; a basal end; a mounting portion (4 th terminal portion); a substrate; a surface-side ground electrode; a back side ground electrode; a plate member; 1 st terminal portion; part 1; part 2; a tip; a tip; a centerline; 2 nd terminal part; a connecting wire; an internal terminal; a center conductor; a proximal end portion; a barrel portion; a tip portion; an installation portion; a notch; an internal terminal; a center conductor; a proximal end portion; a notch; an internal terminal; a center conductor; a proximal end portion; a barrel portion; a through hole; an internal terminal; a proximal end portion; a barrel portion; a tip portion; a mounting portion; 76.. through holes; 80.. a plate-like member; 82... 1 st panel portion; a 2 nd plate portion; a proximal end; a central portion; a tip portion; 86.. an intermediate; 88.. a barrel portion; 89.. a flange portion; 90..

Claims (3)

1. A board-mounted coaxial connector which includes an internal terminal, an external terminal, and an insulating member disposed between the internal terminal and the external terminal, and which is mounted on a board via the internal terminal and the external terminal, the board-mounted coaxial connector being characterized in that,

the internal terminal has: a 1 st terminal part protruding to be inserted into a terminal of a counterpart connector; and a 2 nd terminal portion extending from a base end portion of the 1 st terminal portion in a direction intersecting a protruding direction of the 1 st terminal portion and mounted on the substrate,

the 1 st terminal portion has a cylindrical portion extending in a cylindrical shape from the base end portion, an outer diameter of the base end portion is set to be smaller than or equal to an outer diameter of the cylindrical portion excluding the base end portion,

the outer diameter of the base end portion of the 1 st terminal portion is set to be the same as the outer diameter of the cylindrical portion excluding the base end portion.

2. The board-mounted coaxial connector according to claim 1,

the 1 st terminal portion is formed of one plate-shaped member integrated with the 2 nd terminal portion,

the cylindrical portion of the 1 st terminal portion includes: the first and second portions are disposed so that distal ends of the first and second portions 1 and 2 are opposed to each other.

3. The board-mounted coaxial connector according to claim 1 or 2,

the cylindrical portion of the 1 st terminal portion has a through hole in a side surface thereof, and the insulating member is disposed so as to pass through the through hole.

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