CN219677724U

CN219677724U - Coaxial connector with switch

Info

Publication number: CN219677724U
Application number: CN202190000699.5U
Authority: CN
Inventors: 常门陆宏
Original assignee: Murata Manufacturing Co Ltd
Current assignee: Murata Manufacturing Co Ltd
Priority date: 2020-08-20
Filing date: 2021-07-08
Publication date: 2023-09-12
Anticipated expiration: 2031-07-08
Also published as: WO2022038916A1

Abstract

The present utility model relates to a coaxial connector with a switch. The coaxial connector (10) is provided with a main body (12), a group of first fixed terminals (22A) and first movable terminals (20A), a group of second fixed terminals (22B) and second movable terminals (20B), and a shielding member (25). A group of first fixed terminals (22A) and first movable terminals (20A), and a group of second fixed terminals (22B) and second movable terminals (20B) are housed in the main body (12). The shielding member (25) is disposed between the group of the first fixed terminal (22A) and the first movable terminal (20A) and the group of the second fixed terminal (22B) and the second movable terminal (20B), and has conductivity.

Description

Coaxial connector with switch

Technical Field

The present utility model relates to a coaxial connector with a switch, and more particularly, to a coaxial connector having at least two sets of fixed terminals and movable terminals.

Background

The coaxial connector is mounted on a communication device such as a mobile phone. The coaxial connector includes a fixed terminal and a movable terminal, and is mounted on a circuit board. Hereinafter, such a coaxial connector having a fixed terminal and a movable terminal is also referred to as a coaxial connector with a switch.

In the coaxial connector with a switch, for example, an antenna is connected to a fixed terminal, and a transmitting/receiving circuit of a circuit board is connected to a movable terminal. In general, the movable terminal is connected to the fixed terminal by its own elastic force, and the transmitting/receiving circuit is connected to the antenna via the movable terminal and the fixed terminal. In this state the communication device is used.

On the other hand, at the time of manufacturing or maintenance of the communication device, the electrical characteristics of the transmitting/receiving circuit are checked. In this case, the target coaxial connector connected to the measuring instrument is connected to the coaxial connector with the switch. At this time, the probe of the objective coaxial connector contacts the movable terminal and presses the movable terminal. Thereby, the movable terminal is elastically deformed to be separated from the fixed terminal. Thus, the connection of the fixed terminal and the movable terminal is disconnected, and the probe is connected to the movable terminal. That is, the measuring instrument is connected to the transmitting/receiving circuit via the probe and the movable terminal. In this state, the electric characteristics of the transmitting/receiving circuit are checked.

Patent document 1 (international publication No. 2014/013834) discloses a coaxial connector including two sets of fixed terminals and movable terminals. The two movable terminals are respectively connected with two circuits on the circuit substrate. By connecting the coaxial connector of the measuring device to the coaxial connector with the switch, the electrical characteristics of the two circuits on the circuit board can be inspected.

Patent document 1: international publication No. 2014/0138234

In the coaxial connector of patent document 1, when a signal (current) flows through a signal path based on a set of fixed terminals and movable terminals, electromagnetic waves are radiated from the signal path. Due to this electromagnetic wave, noise is generated in a signal (current) flowing through the other set of the fixed terminal and the movable terminal. That is, the isolation characteristic between the two sets of fixed terminals and the movable terminal is low. In particular, coaxial connectors in recent years have a trend toward miniaturization. In this case, since one set of the fixed terminals and the movable terminals are close to the other set of the fixed terminals and the movable terminals, noise tends to be large.

Disclosure of Invention

The utility model provides a coaxial connector with a switch, which has high isolation property between two groups of fixed terminals and movable terminals.

A coaxial connector with a switch according to an embodiment of the present utility model includes a main body, a first fixed terminal and a first movable terminal group, a second fixed terminal and a second movable terminal group, and a shielding member. The body has an interior space. The main body is formed with a first hole and a second hole penetrating the upper portion of the main body in the vertical direction and communicating with the internal space. The first fixed terminal and the first movable terminal are provided in correspondence with the first hole. The first fixed terminal and the first movable terminal are accommodated in the main body. The first movable terminal has a first plate spring portion. The first plate spring portion is movable in the up-down direction and contacts the first fixed terminal in the internal space of the main body. The second fixed terminal and the second movable terminal are provided in correspondence with the second hole, and are arranged in parallel with the first fixed terminal and the first movable terminal. The second fixed terminal and the second movable terminal are accommodated in the main body. The second movable terminal has a second plate spring portion. The second plate spring portion is movable in the up-down direction and contacts the second fixed terminal in the internal space of the main body. The shielding member is disposed between the first fixed terminal and the first movable terminal and the second fixed terminal and the second movable terminal, and has conductivity. The shielding member does not overlap with any one of the first hole and the second hole when viewed in the up-down direction.

According to the coaxial connector with a switch of one embodiment of the present utility model, the isolation characteristics between the two sets of fixed terminals and the movable terminal are high.

Drawings

Fig. 1 is a perspective view of a coaxial connector according to an embodiment of the present utility model.

Fig. 2 is an exploded perspective view of the coaxial connector.

Fig. 3 is a longitudinal sectional view of the coaxial connector, and is a view showing a normal state.

Fig. 4 is a top view of the coaxial connector.

Fig. 5 is a cross-sectional view of the coaxial connector along the V-V cut line of fig. 1.

Fig. 6 is a bottom view of the coaxial connector.

Fig. 7 is a longitudinal sectional view of the coaxial connector, and is a diagram showing a state when the electrical characteristics of the circuit connected to the coaxial connector are inspected.

Fig. 8 is a schematic view of the right movable terminal, the right fixed terminal, and the shielding member when viewed in the left-right direction.

Fig. 9 is an exploded perspective view of a coaxial connector according to a modification.

Fig. 10 is a cross-sectional view of a coaxial connector according to a modification.

Fig. 11 is a schematic diagram of a coaxial connector for numerical simulation.

Fig. 12 is a graph showing the results of numerical simulation.

Detailed Description

Hereinafter, embodiments of the present utility model will be described. In the following description, embodiments of the present utility model will be described by way of example, but the present utility model is not limited to the examples described below. In the following description, specific numerical values and specific materials are sometimes exemplified, but the present utility model is not limited to these examples.

The coaxial connector of one embodiment includes a main body, a set of first fixed terminals and first movable terminals, a set of second fixed terminals and second movable terminals, and a shielding member. The body has an interior space. The main body is formed with a first hole and a second hole penetrating the upper portion of the main body in the vertical direction and communicating with the internal space. The first fixed terminal and the first movable terminal are provided in correspondence with the first hole. The first fixed terminal and the first movable terminal are accommodated in the main body. The first movable terminal has a first plate spring portion. The first plate spring portion is movable in the up-down direction and contacts the first fixed terminal in the internal space of the main body. The second fixed terminal and the second movable terminal are provided in correspondence with the second hole, and are arranged in parallel with the first fixed terminal and the first movable terminal. The second fixed terminal and the second movable terminal are accommodated in the main body. The second movable terminal has a second plate spring portion. The second plate spring portion is movable in the up-down direction and contacts the second fixed terminal in the internal space of the main body. The shielding member is disposed between the first fixed terminal and the first movable terminal and the second fixed terminal and the second movable terminal, and has conductivity. The shielding member does not overlap with any one of the first hole and the second hole when viewed in the vertical direction (first configuration).

The coaxial connector of the first configuration includes a group of the first fixed terminal and the first movable terminal, and a group of the second fixed terminal and the second movable terminal, and is thus a switch-equipped coaxial connector having two groups of switches. According to the coaxial connector of the first configuration, the shielding member is disposed between the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group. In this specification, the group of the first fixed terminal and the first movable terminal is also referred to as a first terminal assembly. The group of the second fixed terminal and the second movable terminal is also referred to as a second terminal assembly.

Since the shielding member has conductivity, electromagnetic waves are blocked. Therefore, even if electromagnetic waves are radiated from the signal path based on one of the first terminal assembly and the second terminal assembly, the electromagnetic waves can be blocked by the shielding member. Thus, noise is less likely to be generated in the signal path based on the other terminal assembly. Therefore, the isolation characteristic between the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group is high. Namely, the isolation characteristic between the two sets of fixed terminals and the movable terminal is high.

The coaxial connector of the first configuration can be connected to a target coaxial connector connected to the measuring instrument. In this case, the subject coaxial connector includes two probes. In this specification, one of the two detectors is also referred to as a first detector, and the other is also referred to as a second detector.

When the coaxial connector of the first structure is connected to the coaxial connector of the object side, the first detector is inserted through the first hole, contacts the first movable terminal, and presses the first movable terminal. Thereby, the first movable terminal is separated from the first fixed terminal, the connection of the first movable terminal and the first fixed terminal is disconnected, and the first probe is connected to the first movable terminal. Similarly, the second probe is inserted through the second hole, contacts the second movable terminal, and presses the second movable terminal down. Thereby, the second movable terminal is separated from the second fixed terminal, the connection of the second movable terminal and the second fixed terminal is disconnected, and the second probe is connected to the second movable terminal.

In the coaxial connector of the first configuration, the shielding member does not overlap with any one of the first hole and the second hole when viewed in the vertical direction. Therefore, neither the first detector nor the second detector is in contact with the shielding member. This can suppress the short circuit between the first detector and the shielding member, and can suppress the short circuit between the second detector and the shielding member. Thus, the reliability of the measurement performed by each of the first probe and the second probe increases.

In the coaxial connector of the first structure, the shielding member is preferably a plate-like member (second structure). In this case, the width direction of the shielding member coincides with the up-down direction of the coaxial connector. That is, the thickness direction of the shielding member coincides with the arrangement direction of the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group. However, the shape of the shielding member is not particularly limited as long as the shielding member is disposed between the first terminal assembly and the second terminal assembly.

According to the coaxial connector of the second configuration, even in the case where the gap between the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group is small, the shielding member can be safely disposed.

In the coaxial connector of the first or second configuration, the shielding member preferably has a region in which the first plate spring portion moves and a region in which the second plate spring portion moves (third configuration) when viewed in the arrangement direction of the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group.

According to the coaxial connector of the third configuration, the shielding member is present between the first plate spring portion and the second plate spring portion regardless of the position of the first plate spring portion within the movement region thereof. In the same manner, no matter where the second plate spring portion is located in the movement region, a shielding member is present between the first plate spring portion and the second plate spring portion. Therefore, in both the normal use and the inspection, the isolation characteristics between the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group are improved.

In any of the first to third configurations, the main body may include an external terminal exposed to the outside of the coaxial connector. The shielding member is electrically connected to the external terminal (fourth configuration).

In the coaxial connector of the fourth configuration, the external terminal can be used for connection with an external conductor provided in the coaxial connector of the target side, for example. In this case, the external terminal can be set to the ground potential, and the shielding member can be set to the same ground potential as the external terminal. The shielding member at the ground potential further improves the isolation characteristics of the first terminal assembly and the second terminal assembly.

In the coaxial connector of the fourth structure, it is preferable that the external terminal includes an upper wall and two side walls. The upper wall is partially open corresponding to the first and second holes. Two side walls extend from the edge portion of the upper wall, and cover the first fixed terminal and the first movable terminal group and the second fixed terminal and the second movable terminal group from both sides (fifth configuration).

According to the coaxial connector of the fifth configuration, electromagnetic waves directed from the outside of the coaxial connector toward the first terminal assembly and the second terminal assembly (for example, electromagnetic waves radiated from a wiring or the like disposed outside the coaxial connector) are blocked by the upper wall and the side wall of the external terminal. Accordingly, the isolation characteristics of the first terminal assembly and the second terminal assembly are further improved.

In the coaxial connector of the fifth configuration, the shielding member may be electrically connected to the upper wall of the external terminal (sixth configuration). In this case, the shielding member and the external terminal can be electrically connected at a short distance.

In any of the coaxial connectors of the first to sixth configurations, the shielding member may be fitted into a holding recess formed in the bottom surface of the inner space in the main body (seventh configuration). According to the coaxial connector of the seventh configuration, the shielding member is fitted into and held in the holding recess. Therefore, the position of the shielding member with respect to the main body is stable.

In any of the coaxial connectors of the first to sixth configurations, the shielding member may be fitted into a holding hole (eighth configuration) penetrating the lower portion of the main body in the up-down direction. According to the coaxial connector of the eighth structure, the shielding member is fitted into and held by the holding hole. Therefore, the position of the shielding member with respect to the main body is stable.

In the coaxial connector according to the eighth aspect, the shielding member may have an exposed portion exposed on the lower surface of the main body. In this case, the exposed portion may be connected to a ground conductor provided on the board on which the coaxial connector is mounted (ninth configuration).

According to the coaxial connector of the ninth configuration, the exposed portion of the shielding member at the lower surface of the main body can be used for mounting the coaxial connector to the circuit substrate. In addition, by mounting the coaxial connector on the substrate, the shielding member can be set to the ground potential. The shielding member having the ground potential further improves the isolation characteristics of the first terminal assembly and the second terminal assembly.

Hereinafter, a coaxial connector according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

Coaxial connector

Fig. 1 is a perspective view of a coaxial connector 10 according to an embodiment of the present utility model. Fig. 2 is an exploded perspective view of the coaxial connector 10.

Referring to fig. 1 and 2, the coaxial connector 10 includes a main body 12, an inner conductor 19, and a shielding member 25. The main body 12 includes a lower case 18, an upper case 16, and external terminals 14. The external terminal 14 and the internal conductor 19 are made of metal, and have conductivity. The external terminal 14 and the internal conductor 19 are made of, for example, SUS301 (JIS standard) stainless steel.

The shielding member 25 has conductivity. The material of the shielding member 25 is not particularly limited as long as it is a material having conductivity, and is, for example, SUS301 (JIS standard) stainless steel. The lower case 18 and the upper case 16 are made of resin, and have electrical insulation. The shielding member 25 of the present embodiment is a plate-like member. The detailed structure of the shielding member 25 is described later.

The upper case 16 and the external terminals 14 are sequentially overlapped on the lower case 18. In the present specification, the direction in which the external terminals 14, the upper case 16, and the lower case 18 overlap, that is, the stacking direction is referred to as the up-down direction. The side of the lower case 18 where the external terminals 14 are arranged is referred to as upper side, and the side of the lower case 18 where the external terminals 14 are arranged is referred to as lower side.

The inner conductor 19 includes a right movable terminal 20A, a right fixed terminal 22A, a left movable terminal 20B, and a left fixed terminal 22B. For example, the right movable terminal 20A is a first movable terminal, and the right fixed terminal 22A is a first fixed terminal. In this case, the left movable terminal 20B is a second movable terminal, and the left fixed terminal 22B is a second fixed terminal. That is, the group of the right movable terminal 20A and the right fixed terminal 22A is a group of the first movable terminal and the first fixed terminal, and corresponds to the first terminal assembly. The group of the left movable terminal 20B and the left fixed terminal 22B is a group of the second movable terminal and the second fixed terminal, and corresponds to the second terminal assembly.

The group of the left movable terminal 20B and the left fixed terminal 22B is arranged in parallel with the group of the right movable terminal 20A and the right fixed terminal 22A.

The right movable terminal 20A and the right fixed terminal 22A are arranged in a predetermined direction when viewed in the up-down direction. The direction in which the right movable terminal 20A and the right fixed terminal 22A are aligned is taken as the front-rear direction when viewed in the up-down direction. The side where the right movable terminal 20A is arranged with respect to the right fixed terminal 22A is referred to as the rear side, and the side where the right fixed terminal 22A is arranged with respect to the right movable terminal 20A is referred to as the front side. The left movable terminal 20B and the left fixed terminal 22B are arranged in the front-rear direction as viewed in the up-down direction. The left movable terminal 20B is disposed on the rear side with respect to the left fixed terminal 22B.

The direction orthogonal to the up-down direction and the front-rear direction is defined as the left-right direction. The direction rotated 90 ° clockwise from the front direction is regarded as the right and the direction rotated 90 ° counterclockwise from the front direction is regarded as the left, as viewed from the upper side. That is, the arrangement direction of the group of the right movable terminal 20A and the right fixed terminal 22A and the group of the left movable terminal 20B and the left fixed terminal 22B coincides with the left-right direction.

The up, down, front, rear, right and left, and up-down, front-rear, and left-right directions defined above are used for convenience of description only, regardless of the actual orientation of the coaxial connector of the present embodiment.

Referring to fig. 2, the lower case 18 is a plate-like member having a substantially rectangular shape in a plan view. The opposite sides of the lower case 18 are respectively along the front-rear direction and the left-right direction. A slit 53a extending in the front-rear direction is formed in the left-right direction center portion of the lower case 18. The slit 53a penetrates the lower case 18 in the thickness direction (up-down direction) of the lower case 18. A groove 53b extending over the entire length of the lower case 18 in the front-rear direction is formed in the center portion of the lower surface of the lower case 18 in the left-right direction. The groove 53b is connected to the slit 53a. As will be described later, the slit 53a and the groove 53b are used to fit the shielding member 25.

The right and left ends of the lower case 18 are formed with strip portions 52a and 52b, respectively. Each of the strip portions 52a, 52b protrudes upward from the upper surface of the lower case 18 and extends in the front-rear direction. A rectangular parallelepiped cutout 55a is formed at the left end of the right strip 52a in a region other than the front-rear end. A rectangular parallelepiped cutout 55b is formed at the right end of the left strip 52b in a region other than the front-rear end.

A pair of mesa portions 58a, 58b are formed on the front end side of the lower case 18 in the left-right direction. Each of the mesa portions 58a, 58b protrudes from the upper surface of the lower case 18. The right mesa portion 58a is disposed between the slit 53a and the right strip portion 52 a. A left mesa 58b is formed between the slit 53a and the left strip 52b. As will be described later, the mesa portions 58a and 58B are used to fix the right fixed terminal 22A and the left fixed terminal 22B to the main body 12, respectively.

Referring to fig. 2, the upper case 16 has a rail-like outline shape extending in the left-right direction when viewed in the up-down direction. Two holes 34A, 34B penetrating the upper case 16 in the up-down direction are formed in the upper case 16. Hole 34A is located to the right of hole 34B. The right hole 34A is a first hole and the left hole 34B is a second hole.

The central axis CA of the hole 34A and the central axis CB of the hole 34B are both along the up-down direction. In a cross section of the upper case 16 perpendicular to the up-down direction, the holes 34A, 34B are both circular. The upper portion of the hole 34A is in a basin shape having a larger cross-sectional area as the upper side opening is located, and the lower portion of the hole 34A is in a cylindrical shape having a substantially constant diameter in the vertical direction. Similarly, the upper portion of the hole 34B is in a basin shape having a larger cross-sectional area of the upper opening, and the lower portion of the hole 34B is in a cylindrical shape having a substantially constant diameter in the vertical direction.

A pair of rear plate portions 35a, 35b are provided in the left-right direction at the rear side of the lower surface of the upper case 16. The rear plate portions 35a and 35b protrude downward from the lower surface of the upper case 16, and are provided parallel to the lower surface of the upper case 16. The rear plate portion 35a is located on the right side of the rear plate portion 35b. A right front plate portion 36a is provided on the right front side of the lower surface of the upper case 16. The right front plate portion 36a protrudes downward from the lower surface of the upper case 16, and is provided parallel to the lower surface of the upper case 16. The right front plate portion 36a is thinner than the rear plate portion 35 a. The same plate portion (not shown; hereinafter referred to as "left front plate portion") as the right front plate portion 36a is provided on the left front side of the lower surface of the upper case 16 in parallel with the lower surface of the upper case 16. The left front plate portion is thinner than the rear plate portion 35b. The rear plate portions 35a, 35b, the right front plate portion 36a, and the left front plate portion each have a rectangular shape having two pairs of opposite sides along the front-rear direction and the left-right direction, respectively, when viewed in the up-down direction.

The rear plate portion 35a and the right front plate portion 36a are fitted into the cutout 55a formed in the right-side strip portion 52 a. The side surface near the right rear corner of the rear plate portion 35a is in contact with the inner surface near the right rear corner of the cutout 55a. The side surface near the right front corner of the right front plate portion 36a is in contact with the inner surface near the right front corner of the cutout 55a.

The rear plate portion 35b and the left front plate portion are fitted into the notch 55b formed in the left-side bar portion 52 b. The side surface near the left rear corner of the rear plate portion 35b is in contact with the inner surface near the left rear corner of the cutout 55b. The side surface near the left front corner of the left front plate portion is in contact with the inner surface near the left front corner of the cutout 55b. Thereby, the upper housing 16 is positioned relative to the lower housing 18.

Fig. 3 is a longitudinal cross-sectional view of coaxial connector 10. Fig. 3 shows a cross section through the central axis CA of the right hole 34A and along the front-rear direction. However, strictly speaking, the cross section does not include the contact portion between the contact portion 20Ac of the right movable terminal 20A and the contact portion 22Ab of the right fixed terminal 22A, but for convenience, the cross section of fig. 3 includes the contact portion. Referring to fig. 3, an inner space S is formed between the upper surface of the lower case 18 and the lower surface of the upper case 16.

The external terminal 14 is in contact with the outer conductor of the coaxial connector for inspection, and generally functions as a ground (ground) terminal. Referring to fig. 2, the external terminal 14 includes an upper wall 31, a cylindrical portion 32, and bent portions 33a and 33b. The external terminal 14 is constituted by a plate of stainless steel (for example, SUS 301), for example. The external terminal 14 is formed by subjecting a board to various processes such as punching, bending, and drawing. The outer surface of the external terminal 14 is plated (for example, ni (nickel) plated, au (gold) plated) as needed.

The upper wall 31 is plate-shaped and has a substantially rectangular outline when viewed in the vertical direction. The opposite sides of the upper wall 31 are respectively along the front-rear direction and the left-right direction. The bent portions 33a and 33b are connected to the right and left sides of the upper wall 31, respectively. The bent portions 33a and 33b extend over the entire length of the main body 12 in the front-rear direction. The bent portions 33a and 33b are formed by bending a plate-like body extending in the left-right direction from the upper wall 31. Specifically, as shown in fig. 1, the bent portions 33a and 33b are bent to wrap around the lower surface of the lower case 18. Thus, the external terminal 14, the upper case 16, and the lower case 18 are fixed to each other and integrated.

A cylindrical portion 32 protruding upward is provided in the central portion of the upper wall 31. The upper wall 31 is open at portions corresponding to the holes 34A, 34B of the upper case 16. The tube portion 32 extends upward from the opening edge portion. From another point of view, the upper wall 31 protrudes outward in a flange shape from the lower end of the tube portion 32. The cylindrical portion 32 has a rail-like shape extending in the left-right direction when viewed in the up-down direction. An outer conductor (not shown) of the coaxial connector for inspection is fitted around the cylindrical portion 32. The barrel 32 is fitted around the upper housing 16. Thus, the holes 34A, 34B penetrate the upper portion of the main body 12 in the up-down direction.

The holes 34A and 34B communicate with the internal space S (see fig. 3). As shown in fig. 2, through holes 31T penetrating the upper wall 31 in the vertical direction are formed in the front side and the rear side of the tubular portion 32, respectively. The through hole 31T is formed in the center portion of the upper wall 31 in the lateral direction. In fig. 2, only the through-hole 31T formed on the rear side of the tube 32 is shown, but the through-hole 31T is also formed on the front side of the tube 32. As will be described later, the upper rear upper protruding portion 25d and the upper front upper protruding portion 25e of the shielding member 25 are fitted into the through hole 31T.

The inner conductors 19, i.e., the right movable terminal 20A, the right fixed terminal 22A, the left movable terminal 20B, and the left fixed terminal 22B are all plate-like members made of metal. Any of the internal conductors 19 is formed by performing various processes such as punching and bending on a flat metal plate. The inner conductor 19 is housed in the main body 12. As shown in fig. 3, the main portions of the right movable terminal 20A and the right fixed terminal 22A are disposed in the internal space S. Similarly, the main portions of the left movable terminal 20B and the left fixed terminal 22B are disposed in the internal space S.

Referring to fig. 2 and 3, a group of right fixed terminals 22A and right movable terminals 20A (hereinafter, referred to as "right terminal assembly 23A") is provided corresponding to the hole 34A. Specifically, the center axis CA of the hole 34A intersects the right movable terminal 20A. As will be described later, the right movable terminal 20A contacts the right fixed terminal 22A by its own elastic force. The group of the left fixed terminal 22B and the left movable terminal 20B (hereinafter referred to as "left terminal assembly 23B") is provided corresponding to the hole 34B. Specifically, the center axis CB of the hole 34B intersects the left movable terminal 20B, and the left movable terminal 20B contacts the left fixed terminal 22B as described later.

Referring to fig. 2, the right fixed terminal 22A includes a base 22Aa and a contact portion 22Ab. The base 22Aa is sandwiched between the mesa portion 58a of the lower case 18 and the right front plate portion 36a of the upper case 16. Thereby, the right fixed terminal 22A is fixed to the main body 12. In the right fixed terminal 22A, a portion (tip portion 22 AF) on the front side of the base portion 22Aa is exposed to the outside of the main body 12. The contact portion 22Ab is a portion connected to the rear side of the base portion 22Aa, and extends in the left-right direction. Referring to fig. 3, the contact portion 22Ab protrudes from the base portion 22Aa into the internal space S of the main body 12. The mesa portion 58a protrudes from the upper surface of the lower case 18, and thereby the contact portion 22Ab is separated from the upper surface of the lower case 18.

Referring to fig. 2, the right movable terminal 20A is a plate-like member having spring property (elasticity). The right movable terminal 20A includes a base portion 20Aa and a plate spring portion 20Ab. The base 20Aa is a portion near the rear end 20AR of the right movable terminal 20A. The base 20Aa is sandwiched between the upper surface of the lower case 18 and the rear plate portion 35a of the upper case 16. Thereby, the right movable terminal 20A is fixed to the main body 12. In the right movable terminal 20A, a portion (rear end portion 20 AR) on the rear end side of the base portion 20Aa is exposed to the outside of the main body 12.

Referring to fig. 3, the plate spring portion 20Ab protrudes from the base portion 20Aa toward the internal space S of the main body 12, and extends in the front-rear direction toward the contact portion 22Ab of the right fixed terminal 22A. The right movable terminal 20A is slightly bent such that the plate spring portion 20Ab is separated from the upper surface of the lower case 18. The plate spring portion 20Ab is substantially parallel to the upper surface of the lower case 18. The front end of the leaf spring portion 20Ab is bifurcated into two parts, and serves as a contact portion 20Ac of the right movable terminal 20A. The contact portion 20Ac is overlapped under the contact portion 22Ab of the right fixed terminal 22A. The contact portion 20Ac contacts the lower surface of the contact portion 22Ab of the right fixed terminal 22A from below by the upward elastic force of the plate spring portion 20Ab. The plate spring portion 20Ab extends in the front-rear direction, which is the direction from the base portion 20Aa toward the contact portion 22Ab of the right fixed terminal 22A, and thus has a sufficiently large elastic force. Further, as long as the contact portion 20Ac can contact the lower surface of the contact portion 22Ab, the front end portion of the plate spring portion 20Ab may not be bifurcated.

The left fixed terminal 22B has the same structure as the right fixed terminal 22A. Specifically, the following is described. Referring to fig. 2, the left fixed terminal 22B includes a base portion 22Ba and a contact portion 22Bb. The base 22Ba is sandwiched between the mesa portion 58b of the lower case 18 and the left front plate portion of the upper case 16. Thereby, the left fixing terminal 22B is fixed to the main body 12. In the left fixed terminal 22B, a portion (front end portion 22 BF) on the front side of the base portion 22Ba is exposed to the outside of the main body 12. The contact portion 22Bb is a portion connected to the rear side of the base portion 22Ba, and extends in the left-right direction. The contact portion 22Bb protrudes from the base portion 22Ba into the internal space S of the main body 12. The mesa portion 58b protrudes from the upper surface of the lower case 18, whereby the contact portion 22Bb is separated from the upper surface of the lower case 18.

The left movable terminal 20B is a plate-like member having a spring property. The left movable terminal 20B includes a base 20Ba and a plate spring portion 20Bb. The base 20Ba is a portion near the rear end portion 20BR of the left movable terminal 20B. The base 20Ba is sandwiched between the upper surface of the lower case 18 and the rear plate portion 35b of the upper case 16. Thereby, the left movable terminal 20B is fixed to the main body 12. In the left movable terminal 20B, a portion (rear end portion 20 BR) on the rear end side of the base portion 20Ba is exposed to the outside of the main body 12.

The plate spring portion 20Bb protrudes from the base portion 20Ba toward the internal space S of the main body 12, and extends in the front-rear direction toward the contact portion 22Bb of the left fixed terminal 22B. The left movable terminal 20B is slightly bent such that the plate spring portion 20Bb is separated from the upper surface of the lower case 18. The plate spring portion 20Bb is substantially parallel to the upper surface of the lower case 18. The front end of the plate spring portion 20Bb is bifurcated into two portions, and serves as a contact portion 20Bc of the left movable terminal 20B. The contact portion 20Bc is overlapped under the contact portion 22Bb of the left fixed terminal 22B. The contact portion 20Bc is brought into contact with the lower surface of the contact portion 22Bb of the left fixed terminal 22B from below by the upward elastic force of the plate spring portion 20 Bb. The plate spring portion 20Bb extends in the front-rear direction, which is the direction from the base portion 20Ba toward the contact portion 22Bb of the left fixed terminal 22B, thereby having a sufficiently large elastic force. Further, as long as the contact portion 20Bc can contact the lower surface of the contact portion 22Bb, the front end portion of the plate spring portion 20Bb may not be bifurcated.

Referring to fig. 2, the right terminal assembly 23A and the left terminal assembly 23B are arranged in parallel. The right and left terminal assemblies 23A and 23B extend in the front-rear direction as viewed in the up-down direction.

Fig. 4 is a top view of coaxial connector 10. The center axis CA of the right hole 34A intersects the leaf spring portion 20Ab at the right movable terminal 20A. Similarly, the center axis CB of the left hole 34B intersects the leaf spring portion 20Bb at the left movable terminal 20B.

Fig. 5 is a cross-sectional view of the coaxial connector 10 along the V-V cut line of fig. 1. In fig. 5, the lower case 18 and the upper case 16 are not shown. The bent portions 33a and 33B cover the right movable terminal 20A and the left movable terminal 20B from both sides in the left-right direction, particularly, along the vertical direction as side walls. More specifically, a portion of the right movable terminal 20A other than the vicinity of the rear end portion 20AR and a portion of the left movable terminal 20B other than the vicinity of the rear end portion 20BR are present between the bent portions 33a and 33B.

Similarly, the bent portions 33a and 33B cover the right fixed terminal 22A and the left fixed terminal 22B from both sides in the left-right direction, particularly, along the vertical direction, as side walls. More specifically, a portion of the right fixed terminal 22A other than the vicinity of the front end portion 22AF and a portion of the left fixed terminal 22B other than the vicinity of the front end portion 22BF are present between the bent portions 33a and 33B. As described above, the bent portions 33A and 33B cover most of the entire right and left terminal assemblies 23A and 23B from both sides in the left-right direction.

Referring to fig. 2, the shielding member 25 is a plate-like member. The thickness direction of the shielding member 25 is the left-right direction, that is, the arrangement direction of the right terminal assembly 23A and the left terminal assembly 23B. The shielding member 25 has a rectangular portion 25a, a lower rear protruding portion 25b, a lower front protruding portion 25c, an upper rear upper protruding portion 25d, and an upper front upper protruding portion 25e. The rectangular portion 25a has a rectangular shape extending in the front-rear direction when viewed in the left-right direction. The lower rear protruding portion 25b protrudes rearward from a lower portion of the rear end of the rectangular portion 25 a. The lower front protruding portion 25c protrudes forward from the lower portion of the front end of the rectangular portion 25 a. The upper rear upper protruding portion 25d protrudes upward from the rear portion of the upper end of the rectangular portion 25 a. The upper front upper protruding portion 25e protrudes upward from the front of the upper end of the rectangular portion 25 a.

The shielding member 25 is fitted into the slit 53a and the groove 53b. The lower portion of the shielding member 25 has a shape complementary to the slit 53a and the groove 53b. Therefore, the lower portion of the shielding member 25 fits into the slit 53a and the groove 53b, and fills the slit 53a and the groove 53b. The lower rear protruding portion 25b and the lower front protruding portion 25c are fitted into the groove 53b. An upper portion of the shielding member 25 protrudes upward from the upper surface of the lower case 18.

The rectangular portion 25a extends in the up-down direction of the internal space S. Referring to fig. 4, the shielding member 25 is disposed between the right terminal assembly 23A and the left terminal assembly 23B. The shielding member 25 is separated from the right terminal assembly 23A and the left terminal assembly 23B. The shielding member 25 does not overlap with any of the holes 34A, 34B when viewed in the up-down direction. Specifically, the shielding member 25 is disposed between the outer edge of the hole 34A and the outer edge of the hole 34B when viewed in the up-down direction. Referring to fig. 2, the upper rear upper protruding portion 25d and the upper front upper protruding portion 25e are fitted into the through hole 31T formed in the upper wall 31 of the external terminal 14. Thereby, the external terminal 14 is electrically connected to the shielding member 25.

Fig. 6 is a bottom view of coaxial connector 10. The shielding member 25 and the bent portions 33a and 33b of the external terminal 14 are exposed on the bottom surface of the coaxial connector 10. The lower surfaces of the shielding member 25 and the bent portions 33a, 33b of the external terminal 14 are substantially flush with the lower surface of the lower case 18. The front end 22AF of the right fixed terminal 22A and the front end 22BF of the left fixed terminal 22B protrude forward from the front end of the lower case 18. The rear end portion 20AR of the right movable terminal 20A and the rear end portion 22BR of the left movable terminal 20B protrude rearward from the rear end portion of the lower case 18. The lower surfaces of the front end portions 22AF, 22BF and the lower surfaces of the rear end portions 20AR, 20BR are substantially flush with the lower surface of the lower case 18.

The coaxial connector 10 is mounted on a circuit board and used. At this time, the shield member 25, the bent portions 33a and 33b of the external terminal 14, the front end portions 22AF and 22BF, and the rear end portions 20AR and 20BR are connected to the wiring of the circuit board. The shield member 25 and the bent portions 33a and 33b of the external terminal 14 are connected to, for example, a ground conductor on the circuit board. The front end portions 22AF, 22BF and the rear end portions 20AR, 20BR are connected to, for example, signal wiring of a circuit board. In this case, the bent portions 33a and 33b of the shielding member 25 and the external terminal 14 can be set to the same potential (ground potential) and can be set to a reference potential with respect to the potential of each signal wiring.

Assembling method of coaxial connector

The coaxial connector 10 is assembled as follows, for example. At the time of starting assembly, the bent portions 33a, 33b of the external terminal 14 are not bent, but extend in the same plane as the upper wall 31.

First, the lower case 18 in which the shielding member 25 has been fitted into the slit 53a and the groove 53b is prepared. At this time, the shielding member 25 and the lower case 18 formed with the slit 53a and the groove 53b may be prepared separately, and the shielding member 25 may be fitted into the slit 53a and the groove 53b. The lower case 18 in which the shield member 25 is fitted into the slit 53a and the groove 53b may be directly formed by in-mold molding.

Then, the right fixed terminal 22A and the left fixed terminal 22B are mounted to the upper case 16. At this time, the base portions 22Aa, 22Ba are aligned with the right front plate portion 36a and the left front plate portion, respectively. Next, the right movable terminal 20A and the left movable terminal 20B are mounted to the upper case 16. At this time, the base portions 20Aa and 20Ba are aligned with the rear plate portions 35a and 35b, respectively. In this state, the contact portion 20Ac of the right movable terminal 20A is located below the contact portion 22Ab of the right fixed terminal 22A, and the contact portion 20Bc of the left movable terminal 20B is located below the contact portion 22Bb of the left fixed terminal 22B. Here, the lower sides of the contact portions 22Ab, 22Bb refer to the sides opposite to the upper case 16 with respect to the contact portions 22Ab, 22 Bb. The right fixed terminal 22A, the left fixed terminal 22B, the right movable terminal 20A, and the left movable terminal 20B may be attached to the upper case 16 such that the lower surface of the lower case 18 faces upward (on the side opposite to the direction of gravity).

Next, the external terminal 14 is mounted from above with respect to the upper case 16. Thus, in the upper case 16, most of the rear plate portions 35a and 35b, the right front plate portion 36a, and the left front plate portion are accommodated in the tube portion 32. Then, the upper case 16 and the external terminals 14 are laminated on the lower case 18. At this time, the right mesa portion 58a is brought into contact with the base portion 22Aa of the right fixed terminal 22A. The left mesa portion 58B is brought into contact with the base 22Ba of the left fixed terminal 22B. The base 20Aa of the right movable terminal 20A and the base 20Ba of the left movable terminal 20B are brought into contact with the upper surface of the lower case 18. Further, the upper rear upper protruding portion 25d and the upper front upper protruding portion 25e of the shielding member 25 are fitted into the two through holes 31T of the external terminal 14, respectively.

Finally, the bent portions 33a, 33b of the external terminal 14 are bent to be wound around the lower surface of the lower case 18. Thereby, the coaxial connector 10 having the configuration shown in fig. 1 is obtained.

Action of coaxial connector

Next, the operation of the coaxial connector 10 will be described. The coaxial connector 10 is mounted on a circuit board. At the time of manufacturing or maintenance of a device provided with the circuit board, the electrical characteristics of the circuit included in the circuit board are checked. A dedicated measuring instrument was used for the examination. The following describes the circuit as a transceiver circuit. The different transceiver circuits are connected to the right movable terminal 20A and the left movable terminal 20B of the coaxial connector 10. The right fixed terminal 22A and the left fixed terminal 22B of the coaxial connector 10 are connected to the same or different antennas.

Fig. 7 is a longitudinal sectional view of the coaxial connector, and is a diagram showing a state when the electrical characteristics of the circuit connected to the coaxial connector 10 are inspected. Fig. 7 shows a cross section through the central axis CA of the right hole 34A and along the front-rear direction. Therefore, in this cross section, the left hole 34B, the left fixed terminal 22B, and the left movable terminal 20B are not shown. Hereinafter, a method of measuring the electrical characteristics of the transmitting/receiving circuit connected to the right movable terminal 20A will be described. The same procedure is also adopted for measuring the electrical characteristics of the transmitting/receiving circuit connected to the left movable terminal 20B.

When the electrical characteristics of the transmitting/receiving circuit connected to the coaxial connector 10 are checked, the probe 130 of the target coaxial connector connected to the measuring device is inserted into the hole 34A of the coaxial connector 10 from above. In fig. 7, the outer conductor of the coaxial connector is not shown. In addition, at the time of inspection, one of the two probes is inserted into the hole 34A on the right side, while the other probe is inserted into the hole 34B on the left side. However, the probe may be inserted into only one of the right hole 34A and the left hole 34B.

The detector 130 of the target coaxial connector enters the coaxial connector 10 from above the plate spring portion 20Ab of the right movable terminal 20A toward the plate spring portion 20Ab. Then, the detector 130 contacts the plate spring portion 20Ab, and presses the plate spring portion 20Ab as it is. As a result, as shown in fig. 7, the contact portion 20Ac, which is the tip end portion of the plate spring portion 20Ab, is separated from the contact portion 22Ab of the right fixed terminal 22A. As a result, the detector 130 is electrically connected to the right movable terminal 20A, and the electrical connection between the right movable terminal 20A and the right fixed terminal 22A is disconnected. At the same time, the outer conductor of the coaxial connector is fitted in the cylindrical portion 32 of the external terminal 14, and the outer conductor is electrically connected to the external terminal 14. This causes the measuring instrument to be connected to the transmitting/receiving circuit via the probe 130 and the right movable terminal 20A. In this state, the electric characteristics of the transmitting/receiving circuit are checked. In this case, the detector 130 and the right movable terminal 20A become signal paths.

After the inspection, when the coaxial connector to be inspected is removed from the coaxial connector 10, the contact portion 20Ac is returned to the upper side in the vertical direction by the upward elastic force of the plate spring portion 20Ab (see fig. 3). Thereby, the contact portion 20Ac of the right movable terminal 20A contacts the contact portion 22Ab of the right fixed terminal 22A. As a result, the right movable terminal 20A is electrically connected again to the right fixed terminal 22A, and the electrical connection between the detector 130 and the right movable terminal 20A is disconnected. This causes the transmitting/receiving circuit to be connected to the antenna via the right movable terminal 20A and the right fixed terminal 22A. That is, the communication device becomes usable. In this case, the right movable terminal 20A and the right fixed terminal 22A become signal paths.

Fig. 8 is a schematic view of the right movable terminal 20A, the right fixed terminal 22A, and the shielding member 25 when viewed in the left-right direction. In fig. 8, the plate spring portion 20Ab in a normal state, that is, in a state connected to the right fixed terminal 22A is shown by a solid line, and the plate spring portion 20Ab in a state when the electrical characteristics of the circuit connected to the coaxial connector 10 are checked is shown by a two-dot chain line.

Referring to fig. 8, the area where the shielding member 25 is present includes the entire moving area of the leaf spring portion 20Ab of the right movable terminal 20A, as viewed in the left-right direction, i.e., the arrangement direction of the right and left terminal assemblies 23A and 23B. The movement area of the plate spring portion 20Bb of the left movable terminal 20B is substantially the same as the movement area of the plate spring portion 20Ab of the right movable terminal 20A when viewed in the left-right direction. Therefore, the existing region of the shielding member 25 includes the entire moving region of the leaf spring portion 20Bb of the left movable terminal 20B as viewed in the left-right direction.

Effect(s)

Effects of the coaxial connector 10 according to the present embodiment will be described below. A shielding member 25 is present between the right terminal assembly 23A and the left terminal assembly 23B. Since the shielding member 25 has conductivity, electromagnetic waves are blocked. Therefore, even if electromagnetic waves are radiated from the signal path based on the right terminal assembly 23A, the electromagnetic waves can be blocked by the shielding member 25. Thus, noise is less likely to be generated in the signal path based on the left terminal assembly 23B. In addition, even if electromagnetic waves are radiated from the signal path based on the left terminal assembly 23B, the electromagnetic waves can be blocked by the shielding member 25. Thus, noise is less likely to be generated in the signal path based on the right terminal assembly 23A. Therefore, the isolation characteristic between the right terminal assembly 23A and the left terminal assembly 23B is high.

In the above example, when the coaxial connector 10 is viewed in the left-right direction, the existing region of the shielding member 25 includes the entire moving region of the leaf spring portion 20Ab of the right movable terminal 20A and the entire moving region of the leaf spring portion 20Bb of the left movable terminal 20B. Therefore, when the respective leaf spring portions 20Ab, 20Bb are located at any position within the movement region, the shielding member 25 is present between the leaf spring portions 20Ab and 20 Bb. Therefore, in both the normal use and the inspection, the electromagnetic wave from the signal path based on the right terminal assembly 23A toward the left terminal assembly 23B and the electromagnetic wave from the signal path based on the left terminal assembly 23B toward the right terminal assembly 23A can be blocked by the shielding member 25. Accordingly, the isolation characteristic between the right terminal assembly 23A and the left terminal assembly 23B improves.

The following describes the existence region of the shielding member in detail. The leaf spring portion 20Ab of the right movable terminal 20A includes a contact portion 20Ac that is a contact portion with the contact portion 22Ab of the right fixed terminal 22A, and a contact portion with the tip end of the probe 130. In normal use, the contact portion 20Ac of the leaf spring portion 20Ab of the right movable terminal 20A contacts the contact portion 22Ab of the right fixed terminal 22A, and the detector 130 does not contact the leaf spring portion 20Ab of the right movable terminal 20A. That is, in normal use, the right movable terminal 20A is in contact with the right fixed terminal 22A. On the other hand, during inspection, the probe 130 is in contact with the plate spring portion 20Ab of the right movable terminal 20A, and the contact portion 20Ac of the plate spring portion 20Ab of the right movable terminal 20A is not in contact with the contact portion 22Ab of the right fixed terminal 22A. That is, at the time of inspection, the probe 130 is in contact with the right movable terminal 20A.

In normal use, strong electromagnetic waves may be generated from the contact portion of the right movable terminal 20A and the right fixed terminal 22A. This is because mismatch in impedance is likely to occur in the contact portion. At the time of inspection, strong electromagnetic waves may be generated from the contact portion of the right movable terminal 20A and the probe 130. This is because mismatch in impedance is likely to occur in the contact portion. Then, in the case where the shielding member 25 is not present in these contact portions, particularly large noise may be generated in the plate spring portion 20Bb of the left movable terminal 20B.

However, when viewed in the left-right direction, the region where the shielding member 25 is present includes the moving region of the plate spring portions 20Ab, 20Bb, whereby such noise is sufficiently reduced. The same can be said for noise that may be generated in the plate spring portion 20Ab of the right movable terminal 20A due to the left movable terminal 20B.

In the above example, when the coaxial connector 10 is viewed in the left-right direction, the existing region of the shielding member 25 includes the entire moving region of the leaf spring portion 20Ab of the right movable terminal 20A. However, instead of the shield member 25, a shield member smaller than the shield member 25 (hereinafter, referred to as a "miniaturized shield member") may be provided. In the case of providing a miniaturized shielding member, it is preferable that the miniaturized shielding member is sized and arranged so as to be at least effective in blocking the strong electromagnetic wave. The specific mode is as follows.

The area where the miniaturized shielding member is present in the plate spring portion 20Ab when the coaxial connector 10 is viewed in the left-right direction preferably includes at least the following (a), more preferably includes the following (b).

(a) A contact portion between the right movable terminal 20A and the right fixed terminal 22A (contact portion 20Ac of the leaf spring portion 20Ab of the right movable terminal 20A) at the time of normal use, and a contact portion between the right movable terminal 20A and the probe 130 at the time of inspection

(b) A region from a contact portion between the right movable terminal 20A and the right fixed terminal 22A in normal use to a contact portion between the right movable terminal 20A and the probe 130 in inspection

For example, when the miniaturized shielding member includes the above (a), the miniaturized shielding member may include only the contact portion between the right movable terminal 20A and the right fixed terminal 22A (the contact portion 20Ac of the leaf spring portion 20Ab of the right movable terminal 20A) at the time of normal use and the contact portion between the right movable terminal 20A and the probe 130 at the time of inspection, when the coaxial connector 10 is viewed in the left-right direction. However, the shield member 25 including the entire moving region of the plate spring portion 20Ab is more preferable for improving the isolation characteristic than the miniaturized shield member when the coaxial connector 10 is viewed in the left-right direction as shown in fig. 8. The present area of the miniaturized shielding member can be the same as above for the left movable terminal 20B.

The bent portions 33A, 33B of the external terminal 14 cover most of the right and left terminal assemblies 23A, 23B from both sides in the left-right direction, thereby obtaining the following effects. There is a bent portion 33A on the right of the right terminal assembly 23A. There is a bent portion 33B in the left side of the left terminal assembly 23B. An upper wall 31 of the external terminal 14 is present above the right and left terminal assemblies 23A and 23B. Accordingly, electromagnetic waves directed from the outside of the coaxial connector 10 toward the right and left terminal assemblies 23A, 23B are blocked by the upper wall 31 and the bent portions 33A, 33B of the external terminal 14. The electromagnetic wave from the outside of the coaxial connector 10 is, for example, an electromagnetic wave emitted from a wiring or the like disposed outside the coaxial connector 10. Accordingly, the isolation characteristics of each of the right and left terminal assemblies 23A and 23B are further improved.

The plate spring portion 20Ab of the right movable terminal 20A and the plate spring portion 20Bb of the left movable terminal 20B extend in the front-rear direction. That is, the right movable terminal 20A and the left movable terminal 20B exist widely in the front-rear direction. Therefore, in the coaxial connector 10 mounted on the circuit board, the right movable terminal 20A and the left movable terminal 20B easily receive electromagnetic waves from the outside of the coaxial connector 10 from the left-right direction. Therefore, if the bending portion is provided at either one of the end portion in the left-right direction and the end portion in the front-rear direction of the external terminal 14, providing the bending portion at the end portion in the left-right direction makes it easier to improve the isolation characteristics of the right terminal assembly 23A and the left terminal assembly 23B.

When the coaxial connector 10 is viewed in the vertical direction, the shielding member 25 does not overlap with any one of the holes 34A and 34B, thereby obtaining the following effects. The coaxial connector on the object side is provided with a first detector and a second detector. At the time of inspection, the first probe is not interfered with the shielding member 25, but is brought into contact with the plate spring portion 20Ab of the right movable terminal 20A, and presses the plate spring portion 20Ab down. The second probe does not interfere with the shielding member 25, but contacts the plate spring portion 20Bb of the left movable terminal 20B, and presses the plate spring portion 20Bb down. In this case, neither the first detector nor the second detector is in contact with the shielding member 25. This can suppress the short circuit between the first detector and the shielding member 25, and can suppress the short circuit between the second detector and the shielding member 25. Therefore, the reliability of the measurement performed by each of the first probe and the second probe increases.

As shown in fig. 4, in the present embodiment, when the coaxial connector 10 is viewed in the vertical direction, the shielding member 25 does not overlap the portion of the holes 34A, 34B having the largest opening cross-sectional area. However, in order to achieve the above-described effect of avoiding interference and short-circuiting, the shielding member 25 may overlap with a portion having the largest opening cross-sectional area, as long as it does not overlap with a portion having the smallest opening cross-sectional area of the holes 34A and 34B, when viewed in the vertical direction.

The thickness direction of the shielding member 25 coincides with the arrangement direction of the right and left terminal assemblies 23A and 23B. By making the plate-shaped shielding member 25 sufficiently thin, the shielding member 25 can be arranged between the right terminal assembly 23A and the left terminal assembly 23B even in the case where the interval between the right terminal assembly 23A and the left terminal assembly 23B is small.

The shielding member 25 is held by the main body 12 including the lower case 18 by fitting into the slit 53a and the groove 53b of the lower case 18. Therefore, the position of the shielding member 25 with respect to the main body 12 is stable. Then, the shielding member 25 does not accidentally come into contact with the right fixed terminal 22A, the right movable terminal 20A, the left fixed terminal 22B, and the left movable terminal 20B.

Further, the upper rear upper protruding portion 25d and the upper front upper protruding portion 25e of the shielding member 25 are fitted into the through hole 31T of the external terminal 14, whereby the following effects are obtained. The shielding member 25 can be electrically connected to the external terminal 14 at a short distance. If the external terminal 14 is connected to the external conductor of the coaxial connector for inspection, the external terminal 14 can be set to the ground potential, and the shielding member 25 can be set to the same ground potential as the external terminal 14. The shielding member 25 at the ground potential further improves the isolation characteristics of each of the right terminal assembly 23A and the left terminal assembly 23B. In addition, the position of the shielding member 25 with respect to the external terminal 14 is stable.

The shielding member 25 is exposed to the lower surface of the lower case 18, thereby achieving the following effects. When the coaxial connector 10 is mounted on a circuit board, the exposed portion of the shielding member 25 can be connected to a ground conductor on the circuit board. In this case, the shielding member 25 can be set to the ground potential. The shielding member 25 having the ground potential further improves the isolation characteristics of each of the right terminal assembly 23A and the left terminal assembly 23B.

Modified example

Fig. 9 is an exploded perspective view of a coaxial connector 10A according to a modification of the coaxial connector 10. Fig. 10 is a cross-sectional view of the coaxial connector 10A, showing a cross-section corresponding to the cross-section of fig. 5. The coaxial connector 10A includes a shielding member 25A instead of the shielding member 25 included in the coaxial connector 10. The length of the shielding member 25A in the up-down direction is shorter than the shielding member 25. The upper end of the shielding member 25A is flat. That is, the shielding member 25A does not include the upper rear upper protruding portion 25d and the upper front upper protruding portion 25e shown in fig. 2. In response, the through hole 31T shown in fig. 2 is not formed in the upper wall 31 of the external terminal 14.

As shown in fig. 10, the shielding member 25A is separated from the upper wall 31 of the external terminal 14. Therefore, the shielding member 25A is not electrically connected to the external terminal 14. For example, when there is an extending projection of the upper case 16 between the shield member 25A and the external terminal 14, or the like, and it is difficult to bring the shield member 25A into contact with the external terminal 14, such a structure can be adopted. Even in this case, as long as the shielding member 25A is exposed on the lower surface of the lower case 18, the exposed portion of the shielding member 25 can be connected to the ground conductor on the circuit board. This makes it possible to set the shielding member 25A to the ground potential.

Examples

In order to confirm the effect of the present utility model, numerical simulation was performed. In the simulation, the influence of the signal (current) flowing through the left terminal assembly (second terminal assembly) on the signal (current) flowing through the right terminal assembly (first terminal assembly) was examined. In this investigation, S parameter S21 (hereinafter, simply referred to as "S21") was evaluated.

Fig. 11 is a schematic view of a coaxial connector for numerical simulation (hereinafter, referred to as "virtual coaxial connector"). Fig. 11 is a perspective view of a conductive member. The member having conductivity includes an external terminal 14A, a right terminal assembly 23C, and a left terminal assembly 23D. In the simulation, members other than the members having conductivity are omitted, for example, members having insulation similar to those of the lower case 18 and the upper case 16 shown in fig. 2 are omitted.

The external terminal 14A provided in the virtual coaxial connector includes 6 bending portions 33g, 33h, 33i, 33j, 33k, and 33l. The bent portions 33g, 33h, 33i are provided at the left, center, and right, respectively, of the front portion of the external terminal 14A. The bent portions 33j, 33k, 33l are provided at the left, center, and right, respectively, of the rear portion of the external terminal 14A. The bent portions 33g, 33j extend from the left end of the upper wall 31A. The bent portions 33i, 33l extend from the right end of the upper wall 31A. The bent portion 33h extends from the front end of the upper wall 31A. The bent portion 33k extends from the rear end of the upper wall 31A. The distal end portions of the bent portions 33g, 33h, 33i, 33j, 33k, 33l are bent inward of the external terminal 14 when viewed in the up-down direction.

The shielding member 25B is provided only at a portion corresponding to the bent portion 33k in the front-rear direction. That is, the shielding member 25B is provided only at the rear of the external terminal 14A, and is not provided at the front of the external terminal 14A. The shielding member 25B spans between the upper wall 31A and the lower end portion of the bent portion 33k in the up-down direction.

The right terminal assembly 23C and the left terminal assembly 23D are each a continuous strip-shaped conductor having a constant width and thickness. That is, in this simulation, the fixed terminal and the movable terminal are integrated in each of the right terminal assembly 23C and the left terminal assembly 23D. The right terminal assembly 23C and the left terminal assembly 23D are arranged parallel to the upper wall 31A. In the left-right direction, the right terminal assembly 23C is inserted between the side walls of the bent portions 33i, 33l and the bent portions 33h, 33 k. In the left-right direction, the left terminal assembly 23D is inserted between the side walls of the bent portions 33g, 33j and the bent portions 33h, 33 k. The right terminal assembly 23C and the left terminal assembly 23D are arranged at the upper surface of the upper wall 31A and at the center of the lower surfaces of the bent portions 33g, 33h, 33i, 33j, 33k, 33l in the up-down direction.

The conditions for the simulation are as follows.

Length of the external terminal 14A in the front-rear direction: 1.70mm

Length of the external terminal 14A in the left-right direction: 2.05mm

Intervals between the upper surface of the upper wall 31A and the lower surfaces of the bent portions 33g, 33h, 33i, 33j, 33k, 33 l: 0.8mm

Spacing between the center axis of the right terminal assembly 23C and the center axis of the left terminal assembly 23D: 1.0mm

The above virtual coaxial connector and the connector from which the shield member 25B was removed from the virtual coaxial connector were simulated. The relationship between the frequency of the signal flowing through the left terminal assembly 23D and S21 was found by simulation.

Fig. 12 is a graph showing the results of numerical simulation. In fig. 12, the relationship of the frequency of the signal flowing through the left terminal assembly 23D and S21 (S parameter) is shown. In fig. 12, a solid line indicates a result in the case where the shielding member 25B is provided, and a broken line indicates a result in the case where the shielding member is not provided. It is seen that S21 is reduced by about 3dB in the case where the shielding member 25B is provided, compared with the case where the shielding member 25B is not provided. That is, by providing the shielding member 25B, the isolation characteristic between the right terminal assembly 23C and the left terminal assembly 23D can be improved.

Further, as is clear from the above results, even if the shielding member 25B is provided only at the rear portion in the front-rear direction of the external terminal 14A, the effect of improving the isolation characteristic can be obtained. That is, if the shielding member is provided at a part of the front-rear direction of the external terminal 14A, an effect of improving the isolation characteristic can be obtained.

As described above, the coaxial connector of the present embodiment has been described. However, the above embodiments are merely examples for implementing the present utility model. Therefore, the present utility model is not limited to the above-described embodiments, and can be implemented by appropriately changing the above-described embodiments within a range not departing from the gist thereof.

For example, in the lower case 18, a groove-like recess may be formed in the upper surface (bottom surface of the internal space S) of the lower case 18 instead of the slit 53a and the groove 53b. The recess does not penetrate the lower case 18 in the up-down direction. In this case, the shielding members 25, 25A are held to the main body 12 including the lower case 18 by being fitted into the grooves of the lower case 18. Therefore, the positions of the shielding members 25, 25A with respect to the main body 12 are stable.

Between the right terminal assembly 23A and the left terminal assembly 23B, a shielding member can be provided in an arbitrary region. For example, the existence region of the shielding member 25 may include only a part of the movement region of the leaf spring portion 20Ab of the right movable terminal 20A and the leaf spring portion 20Bb of the left movable terminal 20B, as viewed in the left-right direction, that is, the arrangement direction of the right terminal assembly 23A and the left terminal assembly 23B. As long as the isolation characteristic between the right terminal assembly 23A and the left terminal assembly 23B can be improved, the size, shape, and arrangement of the shielding member can be appropriately set.

For example, in the portions where the right terminal assembly 23A and the left terminal assembly 23B are closest, i.e., the contact portions 20Ac, 20Bc, noise is likely to be generated in the signal flowing through one terminal assembly due to the signal flowing through the other terminal assembly. Therefore, the shielding member may be provided only between and in the vicinity of the contact portion 20Ac and the contact portion 20 Bc.

In the above embodiment, the external terminal 14 has one cylindrical portion 32 with respect to the two holes 34A, 34B. However, the external terminal 14 may have one cylindrical portion with respect to each of the holes 34A, 34B.

The coaxial connector may include 3 or more sets of fixed terminals and movable terminals. For example, the coaxial connectors 10 and 10A may further include a set of fixed terminals and movable terminals (hereinafter referred to as a "third terminal assembly") on the right side of the right terminal assembly 23A. In this case, the same shielding members as the shielding members 25 and 25A are preferably disposed between the right terminal assembly 23A and the third terminal assembly. Thereby, the isolation characteristic between the third terminal assembly and the right terminal assembly 23A improves.

In this case, a third hole similar to the holes 34A and 34B is provided corresponding to the third terminal assembly. It is preferable that none of the shielding members overlap any of the holes 34A, 34B and the third hole when the coaxial connector is viewed in the up-down direction. Thus, the same effects as described above are obtained.

Industrial applicability

As described above, the present utility model is useful for a coaxial connector with a switch including at least two sets of fixed terminals and movable terminals.

Description of the reference numerals

10. Coaxial connector; main body; external terminals; upper housing; lower housing; inner conductor; right movable terminal; leaf spring part; left movable terminal; leaf spring part; right fixed terminal; left fixed terminal; right terminal assembly; 23B, 23d. left terminal assembly; 25. 25A, 25b. shielding members; upper wall; cylinder part; 33a, 33b, 33g, 33h, 33i, 33j, 33k, 33 l; 34A, 34B. Slits; grooves; detector.

Claims

1. A coaxial connector with a switch, comprising:

a main body having an inner space, and formed with a first hole and a second hole penetrating an upper portion of the main body in a vertical direction and communicating with the inner space;

a first fixed terminal and a first movable terminal group provided in correspondence with the first hole and accommodated in the main body, the first movable terminal having a first leaf spring portion movable in the up-down direction and contacting the first fixed terminal in the internal space;

A second fixed terminal and a second movable terminal group provided in correspondence with the second hole, arranged in parallel with the first fixed terminal and the first movable terminal group, and housed in the main body, the second movable terminal having a second leaf spring portion movable in the up-down direction and contacting the second fixed terminal in the internal space; and

and a shielding member disposed between the group of the first fixed terminal and the first movable terminal and the group of the second fixed terminal and the second movable terminal, and having conductivity, the shielding member not overlapping with any one of the first hole and the second hole when viewed in the vertical direction.

2. The coaxial connector with switch of claim 1,

the shielding member is a plate-like member standing up in the up-down direction.

3. The coaxial connector with switch of claim 1,

the shielding member includes a moving region of the first plate spring portion and a moving region of the second plate spring portion, as viewed in an arrangement direction of the first fixed terminal and the group of the first movable terminal and the group of the second fixed terminal and the second movable terminal.

4. A coaxial connector with switch according to any one of claims 1-3,

the main body is provided with an external terminal exposed outside the coaxial connector with the switch,

the shielding member is electrically connected to the external terminal.

5. The coaxial connector with switch of claim 4,

the external terminal includes:

an upper wall that is partially opened corresponding to the first hole and the second hole; and

two side walls extending from edge portions of the upper wall and covering the group of the first fixed terminal and the first movable terminal and the group of the second fixed terminal and the second movable terminal from both sides.

6. The coaxial connector with switch of claim 5,

the shielding member is electrically connected with the upper wall of the external terminal.

7. A coaxial connector with switch according to any one of claims 1-3,

the shielding member is fitted into a holding recess formed in the main body at a bottom surface of the internal space.

8. A coaxial connector with switch according to any one of claims 1-3,

The shielding member is fitted into a holding hole penetrating a lower portion of the main body in an up-down direction.

9. The coaxial connector with switch of claim 8,

the shielding member has an exposed portion exposed from a lower surface of the main body,

the exposed portion is connected to a ground conductor provided on a substrate on which the coaxial connector with switch is mounted.