JP7334791B2 - Inspection connector and inspection unit - Google Patents

Description

The present invention relates to an inspection connector and an inspection unit.

As an invention relating to conventional inspection connectors and inspection units, for example, a probe described in Patent Document 1 is known. The probe described in Patent Document 1 is used for measuring high frequency signals. Therefore, the probe described in Patent Document 1 includes a coaxial cable, a probe pin and a plunger. A coaxial cable has an outer conductor and a center conductor. A probe pin is electrically connected to the center conductor. The plunger is electrically connected to the outer conductor.

In the probe described in Patent Document 1 as described above, it is required that the loss of the probe is small and that the coaxial cable can be flexibly deformed.

JP 2019-138768 A

By the way, among inspection connectors, in addition to probes for measuring high-frequency signals, there are inspection connectors for measuring DC signals (for example, power supplies) and signals having a relatively low frequency. In such an inspection connector, it is also required that the loss of the inspection connector, the cable, and the inspection unit including the connector is small, and that the cable can be flexibly deformed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inspection connector and an inspection unit in which the loss of the inspection unit is small and the coaxial line portion can be flexibly deformed.

A coaxial line section (coaxial cable) may not be used in a test connector for measuring DC signals or signals having a relatively low frequency. More specifically, in a test connector for measuring DC signals, the cable may have a structure in which the center conductor is sheathed and may not have an outer conductor. Also, for test connectors that measure signals having relatively low frequencies (e.g., high frequency signals having frequencies of 15 MHz or less), the cables have coated center conductors that transmit signals having relatively low frequencies. It is only necessary to include a first cable having a structure and a second cable having a structure in which a central conductor connected to a ground potential is covered. A cable having a structure in which the central conductor is covered is hereinafter referred to as a covered wire.

However, when a coated wire is used in an inspection connector, it is difficult to achieve both reduction in loss of the inspection unit and flexibility of the coated wire, as described below. More specifically, in order to reduce the loss of the inspection unit, it is conceivable to thicken the center conductor of the coated wire. When the central conductor of the covered wire becomes thick, it becomes difficult for the covered wire to flexibly deform.

As a result of further studies, the inventors of the present application came to the conclusion that the outer conductor of the coaxial line portion should be used for transmitting a DC signal or a signal having a relatively low frequency. More specifically, the coaxial line section includes a center conductor, an outer conductor and an insulator. In the cross section of the coaxial line portion, the outer conductor has a relatively large area. Therefore, if the outer conductor, which should normally be connected to the ground potential, is used for transmitting a DC signal or a signal having a relatively low frequency, the loss of the inspection unit can be reduced. Furthermore, the coaxial line portion has an insulator that insulates the central conductor from the outer conductor. This insulator is an elastic body. Therefore, the insulator helps the coaxial line portion to deform smoothly. Thus, the inventors of the present application have found that in a test connector for measuring a DC signal or a signal having a relatively low frequency, the outer conductor of the coaxial line portion is used to transmit a DC signal or a signal having a relatively low frequency. Then, I realized that it is possible to reduce the loss of the inspection unit and make the coaxial line flexible.

The connector for inspection according to the present invention includes:
An inspection connector connected to an end of a coaxial line portion comprising a central conductor, an outer conductor surrounding the central conductor, and a first insulator insulating the central conductor and the outer conductor ,
a plunger that holds the coaxial line portion in a state insulated from the outer conductor, the plunger having a through hole extending along the extension direction of the coaxial line portion;
a measuring pin supported by the plunger in a state of being insulated from the plunger, the measuring pin passing through the through hole;
and
The outer conductor of the coaxial line portion, wherein the measuring pin includes the central conductor, the outer conductor surrounding the central conductor, and the first insulator insulating the central conductor and the outer conductor. is electrically connected to

The inspection unit according to the present invention includes:
a coaxial line portion including a central conductor, an outer conductor surrounding the central conductor, and a first insulator insulating the central conductor and the outer conductor;
the inspection connector connected to the end of the coaxial line;
Prepare.

ADVANTAGE OF THE INVENTION According to this invention, the loss of an inspection unit can be reduced and a cable can be deform|transformed flexibly.

FIG. 1 is an external perspective view of an inspection unit 10. FIG. FIG. 2 is a cross-sectional view of the inspection connector 100. As shown in FIG. FIG. 3 is a cross-sectional view of the lower portion of the inspection connector 100. FIG. FIG. 4 is a cross-sectional view of the inspection connector 100 and the connector 300. FIG. FIG. 5 is a cross-sectional view of the lower portion of the inspection connector 100a of the inspection unit 10a. FIG. 6 is a cross-sectional view of the lower portion of an inspection connector 100b according to a modification.

(First embodiment)
[Structure of inspection unit]
The structure of the inspection unit 10 according to the first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of an inspection unit 10. FIG. FIG. 2 is a cross-sectional view of the inspection connector 100. As shown in FIG. FIG. 3 is a cross-sectional view of the lower portion of the inspection connector 100. FIG.

As shown in FIGS. 1 to 3, the up-down direction, the left-right direction and the front-rear direction are defined. However, the up-down direction, the left-right direction, and the front-rear direction are directions defined for explanation. Therefore, the vertical direction, the horizontal direction, and the front-back direction of the inspection unit 10 during actual use need not coincide with the vertical direction, the left-right direction, and the front-back direction in FIGS.

In this specification, shafts and members extending in the front-rear direction do not necessarily indicate only shafts and members parallel to the front-rear direction. A shaft or member extending in the front-rear direction is a shaft or member that is inclined within a range of ±45° with respect to the front-rear direction. Similarly, the vertically extending shafts and members refer to shafts and members that are inclined within a range of ±45° with respect to the vertical direction. A shaft or member extending in the left-right direction means a shaft or member that is inclined within a range of ±45° with respect to the left-right direction.

In this specification, the first member and the second member arranged in the front-rear direction indicate the following states. It is a state in which both the first member and the second member are arranged on an arbitrary straight line indicating the front-rear direction when the first member and the second member are viewed in a direction perpendicular to the front-rear direction. In this specification, the first member and the second member arranged in the front-rear direction when viewed in the vertical direction indicate the following states. Both the first member and the second member are arranged on an arbitrary straight line indicating the front-rear direction when the first member and the second member are viewed in the vertical direction. In this case, when the first member and the second member are viewed from the horizontal direction different from the vertical direction, either one of the first member and the second member may not be arranged on an arbitrary straight line indicating the front-rear direction. . In addition, the 1st member and the 2nd member may contact. The first member and the second member may be separated. A third member may be present between the first member and the second member. This definition also applies to directions other than the fore-and-aft direction. Note that the first to third members are part of the inspection unit.

In this specification, the first member being arranged in front of the second member refers to the following state. At least a portion of the first member is disposed within a region through which the second member translates forward. Thus, the first member may be contained within an area through which the second member translates forward, or protrude from an area through which the second member translates forward. good too. In this case, the first member and the second member are arranged in the front-rear direction. This definition also applies to directions other than the fore-and-aft direction.

In this specification, when viewed in the left-right direction, the first member is arranged in front of the second member refers to the following state. The first member and the second member are arranged in the front-rear direction when viewed in the left-right direction, and the portion of the first member facing the second member when viewed in the left-right direction is the portion of the second member. placed in front. In this definition, the first member and the second member may not be aligned in the front-rear direction in three dimensions. This definition also applies in directions other than the fore-and-aft direction.

In this specification, that the first member is arranged before the second member refers to the following state. The first member is positioned in front of a plane that passes through the front end of the second member and is perpendicular to the front-rear direction. In this case, the first member and the second member may or may not be aligned in the front-rear direction. This definition also applies to directions other than the fore-and-aft direction.

In this specification, unless otherwise specified, each part of the first member is defined as follows. By front of the first member is meant the front half of the first member. A rear portion of the first member means the rear half of the first member. The left portion of the first member means the left half of the first member. The right portion of the first member means the right half of the first member. By top of the first member is meant the top half of the first member. A lower portion of the first member means a lower half of the first member. The front end of the first member means the front end of the first member. The rear end of the first member means the rearward end of the first member. The left end of the first member means the left end of the first member. The right end of the first member means the right end of the first member. The upper end of the first member means the upper end of the first member. The lower end of the first member means the downward end of the first member. The front end of the first member means the front end of the first member and its vicinity. The rear end of the first member means the rear end of the first member and its vicinity. The left end of the first member means the left end of the first member and its vicinity. The right end of the first member means the right end of the first member and its vicinity. The upper end of the first member means the upper end of the first member and its vicinity. The lower end of the first member means the lower end of the first member and its vicinity.

If any two members in this specification are defined as a first member and a second member, the relationship between any two members has the following meaning. In this specification, the first member being supported by the second member means that the first member is attached to the second member so as not to move relative to the second member (that is, is fixed). and the case where the first member is attached to the second member so as to be movable relative to the second member. Further, the first member being supported by the second member means that the first member is directly attached to the second member, and that the first member is attached to the second member via the third member. includes both when

In this specification, the first member being supported by the second member means that the first member is attached to the second member so as not to move relative to the second member (that is, is fixed). It does not include the case where the first member is movably attached to the second member relative to the second member. Further, the first member is held by the second member means that the first member is directly attached to the second member, and that the first member is attached to the second member via the third member. includes both when

In this specification, "the first member and the second member are electrically connected" means that electricity is conducting between the first member and the second member. Therefore, the first member and the second member may be in contact with each other, or the first member and the second member may not be in contact with each other. When the first member and the second member are not in contact with each other, an electrically conductive third member is arranged between the first member and the second member.

The test unit 10 is used for measuring DC signals or signals with relatively low frequencies transmitted in electronic equipment. In this embodiment, the testing unit 10 is used for measuring signals with relatively low frequencies. The inspection unit 10 includes an inspection connector 100, external connectors 200a and 200b, and coaxial cables 202a and 202b (coaxial line portions). The external connectors 200a and 200b are connected to measuring equipment (not shown). Since the structure of the external connection connectors 200a and 200b is a general structure, description thereof is omitted.

The coaxial cable 202a electrically connects the inspection connector 100 and the external connection connector 200a. The coaxial cable 202b electrically connects the inspection connector 100 and the external connection connector 200b. Coaxial cables 202a and 202b have the same structure. The structure of the coaxial cable 202a will be described as an example.

The coaxial cable 202a includes a center conductor 204a, an outer conductor 206a, an insulator 208a (first insulator) and a coating 210a (second insulator). The central conductor 204a is the core wire of the coaxial cable 202a. Accordingly, center conductor 204a is located in the center of coaxial cable 202a. The central conductor 204a is made of a low resistance conductor. The center conductor 204a is made of copper, for example.

The outer conductor 206a surrounds the central conductor 204a. Therefore, the outer conductor 206a has an annular shape in a cross section perpendicular to the direction in which the coaxial cable 202a extends. Such an outer conductor 206a is produced, for example, by weaving thin wires. The outer conductor 206a is made of a low resistance conductor. The outer conductor 206a is made of copper, for example.

Insulator 208a insulates center conductor 204a and outer conductor 206a. An insulator 208a is located between the center conductor 204a and the outer conductor 206a. An insulator 208a surrounds the center conductor 204a. The insulator 208a is surrounded by an outer conductor 206a. The insulator 208a has an annular shape in a cross section perpendicular to the direction in which the coaxial cable 202a extends. The insulator 208a is made of an insulating resin. The insulator 208a is made of polyethylene, for example. Also, the insulator 208a is provided with a plurality of holes so that the coaxial cable 202a can be flexibly deformed.

Coating 210a surrounds outer conductor 206a. Therefore, the coating 210a has an annular shape in a cross section perpendicular to the extending direction of the coaxial cable 202a. Coating 210a is made of an insulating resin. Coating 210a is made of polyethylene, for example. However, coating 210 a does not have a plurality of holes or has fewer holes than insulator 208 . Therefore, the coating 210a is less deformable than the insulator 208a. Therefore, the Young's modulus of coating 210a is greater than that of insulator 208a. Also, the thickness of the coating 210a is smaller than the thickness of the insulator 208a.

At the lower end of coaxial cable 202a, outer conductor 206a, insulator 208a and coating 210a are removed to expose center conductor 204a within barrel 122a, which will be described later. Below, the part where the central conductor 204a is exposed is called the central conductor exposed part 205a. In addition, the outer conductor 206a is exposed by removing the film 210a on the portion adjacent to the exposed central conductor portion 205a on the exposed central conductor portion 205a. The portion where the outer conductor 206a is exposed is hereinafter referred to as an outer conductor exposed portion 207a.

The inspection connector 100 is connected to the ends of coaxial cables 202a and 202b. In this embodiment, the inspection connector 100 is connected to the lower ends of the coaxial cables 202a and 202b. The inspection connector 100 comprises a plunger 102, a housing 104, a flange 106, a spring 108, a spacer 110, measuring pins 120a, 120b, barrels 122a, 122b, bushings 124a, 124b, 126a, 126b (first insulating member). .

The plunger 102 is a cylindrical member extending vertically. The plunger 102 is provided with a through hole H1 extending in the vertical direction. The through hole H1 extends along the extending direction of the coaxial cable 202a. The through hole H1 extends through the plunger 102 from its upper end to its lower end. Plunger 102 holds coaxial cables 202a, 202b insulated from outer conductors 206a, 206b. A manner in which the plunger 102 holds the outer conductors 206a and 206b will be described later. Such plunger 102 is made of highly conductive metal. The plunger 102 is made of SUS, for example.

The housing 104 is a tubular member extending vertically. The housing 104 is provided with a vertically extending through hole H2. The through hole H2 extends through the housing 104 from the top end to the bottom end. The lower end of housing 104 is inserted into the upper portion of plunger 102 . As a result, the through holes H1 and H2 overlap when viewed downward. Such a housing 104 is made of highly conductive metal. The housing 104 is made of SUS, for example.

Spacer 110 is arranged between plunger 102 and housing 104 in the vertical direction. Spacer 110 has a disc shape. Two holes are provided near the center of the spacer 110 when viewed downward. Coaxial cables 202a and 202b pass vertically through these two holes. Thereby, the spacer 110 positions the coaxial cables 202a and 202b in the longitudinal direction and the lateral direction. Such a spacer 110 is made of highly conductive metal. The spacer 110 is made of SUS, for example.

The flange 106 is a plate-shaped member. Flange 106 has a rectangular shape when viewed downward. The flange 106 is arranged near the upper end of the housing 104 in the vertical direction. The flange 106 is provided with a through hole H3 extending in the vertical direction. The housing 104 extends vertically within the through hole H3. However, the diameter of the upper end of housing 104 is larger than the diameter of through hole H3 of flange 106 . Therefore, the housing 104 cannot pass downward through the through hole H3. Such a flange 106 is made of highly conductive metal. The flange 106 is made of SUS, for example.

A spring 108 pushes the flange 106 upward. A spring 108 pushes the plunger 102 downward. More specifically, the upper end of spring 108 is fixed to the lower surface of flange 106 . The lower end of spring 108 is fixed to the upper end of plunger 102 . Plunger 102 and housing 104 are integrated. Therefore, when the plunger 102 is pushed upward, the spring 108 is compressed and the plunger 102 and the housing 104 are displaced upward relative to the flange 106 .

The measuring pin 120a is a terminal to which a signal having a relatively low frequency is applied. The measuring pin 120a is electrically connected to the outer conductor 206a of the coaxial cable 202a, which includes a center conductor 204a, an outer conductor 206a surrounding the center conductor 204a, and an insulator 208a insulating the center conductor 204a and the outer conductor 206a. It is connected to the. In this embodiment, the measuring pin 120a is electrically connected to the outer conductor 206a and the center conductor 204a of the coaxial cable 202a. The measuring pin 120a is a rod-shaped member that extends vertically. At least part of the measurement pin 120a extends vertically within the through hole H1. The measurement pin 120a is inserted through the through hole H1. In this embodiment, the lower end of the measuring pin 120a protrudes downward from the through hole H1.

The measuring pin 120a includes a tubular portion 1202a, a lower pin 1204a, an upper pin 1206a and a spring 1208a. The cylindrical portion 1202a has a cylindrical shape with a vertically extending central axis. However, the diameters of the upper and lower ends of the tubular portion 1202a are smaller than the diameter of the remainder of the tubular portion 1202a. That is, the tubular portion 1202a has a shape in which the upper end portion and the lower end portion of the tubular portion 1202a are slightly narrowed.

The lower pin 1204a is a rod-shaped member extending vertically. An upper portion of the lower pin 1204a is positioned within the cylindrical portion 1202a. A lower portion of the lower pin 1204a is positioned outside the tubular portion 1202a. However, the diameter of the top portion of the lower pin 1204a is larger than the diameter of the rest of the lower pin 1204a. As a result, the lower pin 1204a cannot pass downward through the cylindrical portion 1202a.

The upper pin 1206a is a bar-shaped member extending vertically. A lower portion of the upper pin 1206a is positioned within the tubular portion 1202a. An upper portion of the upper pin 1206a is positioned outside the cylindrical portion 1202a. However, the diameter of the lower portion of the upper pin 1206a is larger than the diameter of the remaining portion of the upper pin 1206a. As a result, the upper pin 1206a cannot pass upward through the cylindrical portion 1202a.

A spring 1208a is disposed within the tubular portion 1202a. The lower end of spring 1208a contacts the upper end of lower pin 1204a. The upper end of spring 1208a contacts the lower end of upper pin 1206a. As a result, the spring 1208a pushes the lower pin 1204a downward and pushes the upper pin 1206a upward. The measuring pin 120a having the structure described above can expand and contract in the vertical direction.

The measuring pin 120a as described above is made of brass, for example. The measuring pin 120a is supported by the plunger 102 while being insulated from the plunger 102, as will be described later.

Barrel 122a holds measuring pin 120a and outer conductor 206a. More specifically, barrel 122a is secured to the lower end of coaxial cable 202a. The barrel 122a has a cylindrical shape with a vertically extending central axis. However, a vertically extending hole H10 is provided in the lower portion of the barrel 122a. A part of the measuring pin 120a is arranged in the hole H10. The measuring pin 120a is soldered to the barrel 122a. Thereby, the measuring pin 120a and the barrel 122a are electrically connected. A lower end portion of the measuring pin 120a protrudes downward from the hole H10.

A vertically extending hole H11 is provided in the upper portion of the barrel 122a. The central conductor exposed portion 205a and the outer conductor exposed portion 207a are arranged in the hole H11. The central conductor exposed portion 205a and the outer conductor exposed portion 207a are fixed to the barrel 122a by soldering. Thereby, the central conductor 204a and the barrel 122a are electrically connected. The outer conductor 206a and the barrel 122a are electrically connected. With the above structure, the measuring pin 120a is electrically connected to the outer conductor 206a and the central conductor 204a through the barrel 122a. The barrel 122a having the above structure is made of brass, for example.

Bushing 124a is an insulating member that is retained on plunger 102 and retains barrel 122a. The bushing 124a has a cylindrical shape with a vertically extending central axis. The bushing 124a is provided with a vertically extending through hole H21. A lower portion of the barrel 122a is arranged in the through hole H21. The bushing 124a is arranged in the through hole H1. Bushing 124a thereby prevents contact between plunger 102 and barrel 122a. That is, bushing 124a provides insulation between plunger 102 and barrel 122a. A bushing 124 a insulates the measuring pin 120 a and the plunger 102 . The bushing 124a is made of insulating resin. The bushing 124a is made of epoxy resin, for example.

Bushing 126a is an insulating member that is retained on plunger 102 and retains barrel 122a. The bushing 126a has a cylindrical shape with a vertically extending central axis. The bushing 126a is provided with a vertically extending through hole H22. The upper portion of the barrel 122a is arranged within the through hole H22. The bushing 124a is arranged in the through hole H1. Bushing 126a thereby prevents contact between plunger 102 and barrel 122a. That is, bushing 126a provides insulation between plunger 102 and barrel 122a. Bushing 126a insulates measurement pin 120a and plunger 102 . The bushing 126a is made of insulating resin. The bushing 126a is made of epoxy resin, for example.

Measuring pin 120b, barrel 122b and bushings 124b and 126b are positioned to the right of measuring pin 120a, barrel 122a and bushings 124a and 126a. The measurement pin 120b is a terminal connected to ground potential. However, the structure of the measuring pin 120b, the barrel 122b, and the bushings 124b, 126b is the same as the structure of the measuring pin 120a, the barrel 122a, and the bushings 124a, 126a, so the description thereof will be omitted.

[How to use the inspection unit]
Next, how to use the inspection unit 10 according to the first embodiment will be described with reference to the drawings. FIG. 4 is a cross-sectional view of the inspection connector 100 and the connector 300. FIG.

The connector 300 is mounted on the circuit board of the electronic device. Connector 300 includes a plurality of terminals 302a-302d. A signal having a relatively low frequency is output from the terminal 302a. Terminal 302c is connected to the ground potential.

The inspection connector 100 is set on the connector 300 . Then, the inspection connector 100 is lowered. This brings the measuring pin 120a into contact with the terminal 302a. That is, a signal having a relatively low frequency is applied to the measuring pin 120a. At this time, the measuring pin 120a is pushed upward by the terminal 302a. Therefore, the measuring pin 120 a is displaced upward with respect to the plunger 102 . Measuring pin 120b contacts terminal 302c. That is, the measurement pin 120b is connected to ground potential. At this time, the measuring pin 120b is pushed upward by the terminal 302c. Therefore, the measuring pin 120b is displaced upward with respect to the plunger 102 . By the operation described above, the measuring device connected to the inspection connector 100 can measure a signal having a relatively low frequency.

[effect]
According to the inspection unit 10 and the inspection connector 100, the loss of the inspection unit 10 is small and the coaxial cable 202a can be flexibly deformed. More specifically, coaxial cable 202a includes a center conductor 204a, an outer conductor 206a and an insulator 208a. In the cross section of coaxial cable 202a, outer conductor 206a has a relatively large area. Therefore, in the inspection connector 100, the external conductor 206a is used to transmit a DC signal or a signal having a relatively low frequency, thereby reducing the loss of the inspection unit 10. FIG. In addition, coaxial cable 202a includes an insulator 208a that insulates center conductor 204a and outer conductor 206a. This insulator 208a is an elastic body. Therefore, the insulator 208a helps the coaxial cable 202a to flexibly deform. Thus, in the test connector 100 for measuring a DC signal or a signal having a relatively low frequency, if the outer conductor 206a of the coaxial cable 202a is used for transmitting a DC signal or a signal having a relatively low frequency, Both reduction in loss of the inspection unit 10 and flexibility of the coaxial cable 202a can be achieved.

According to the inspection unit 10 and the inspection connector 100, the loss of the inspection unit 10 can be further reduced. More specifically, measurement pin 120a is electrically connected to outer conductor 206a and center conductor 204a. This allows the center conductor 204a in addition to the outer conductor 206a to be used to transmit a DC signal or a signal having a relatively low frequency. As a result, according to the inspection unit 10 and the inspection connector 100, the loss of the inspection unit 10 can be further reduced.

According to the inspection unit 10 and the inspection connector 100, the loss of the inspection unit 10 can be further reduced. More specifically, measurement pin 120a is electrically connected to outer conductor 206a through barrel 122a. Thus, when the barrel 122a is used, it is easy to increase the contact area between the measuring pin 120a and the barrel 122a. Also, it is easy to increase the contact area between the outer conductor 206a and the barrel 122a. As a result, the resistance between the measuring pin 120a and the outer conductor 206a is reduced. Therefore, according to the inspection unit 10 and the inspection connector 100, the loss of the inspection unit 10 can be further reduced.

In the inspection unit 10 and the inspection connector 100, the coaxial cable 202a has a central conductor. A coaxial cable 202a with a center conductor 204a has a more stable outer conductor 206a surface profile than a cable with an outer conductor and no center conductor. As a result, it is possible to suppress unnecessary changes in the capacitive coupling that occurs between the outer conductor 206a and other conductor members. As a result, stable measurement by the inspection unit 10 and the inspection connector 100 can be achieved.

In the inspection unit 10 and the inspection connector 100 , when the plunger 102 is pushed upward, the spring 108 contracts and the plunger 102 and housing 104 are displaced upward relative to the flange 106 . As a result, the vertical position of the measuring pin 120 a can be adjusted while the plunger 102 is connected to the connector 300 . As a result, the measurement pin 120a and the terminal 302a of the connector 300 can be brought into contact more reliably.

(Second embodiment)
[Structure of inspection unit]
The structure of the inspection unit 10a according to the second embodiment of the present invention will be described below with reference to the drawings. FIG. 5 is a cross-sectional view of the lower portion of the inspection connector 100a of the inspection unit 10a.

In the inspection connector 100, the plunger 102 and the measuring pin 120a are insulated by insulating the plunger 102 and the barrel 122a. On the other hand, in the inspection connector 100a, the plunger 102 and the measuring pin 120a are insulated by insulating the measuring pin 120a and the barrel 122a. The structure of the inspection connector 100a will be described below, focusing on this difference.

Test connector 100a includes plunger 102, housing 104, flange 106 (not shown in FIG. 5), spring 108 (not shown in FIG. 5), measuring pin 120a, barrel 122a, bushing 128a (second insulating member) and A bushing 130a (third insulating member) is provided. The plunger 102, housing 104, flange 106, spring 108 and measuring pin 120a of the test connector 100a are the same as the plunger 102, housing 104, flange 106, spring 108 and measuring pin 120a of the test connector 100, respectively. omitted.

Barrel 122 a is retained on plunger 102 . More specifically, the barrel 122a is arranged within the through hole H1. Barrel 122 a also contacts plunger 102 . The barrel 122a has a cylindrical shape with a vertically extending central axis. The barrel 122a is provided with a vertically extending through hole H30. The through hole H30 penetrates from the top end to the bottom end of the barrel 122a.

The measuring pin 120a is arranged in the through hole H30 of the barrel 122a. However, the measuring pin 120a and the barrel 122a are insulated. Specifically, bushing 128a is retained in barrel 122a and retains measuring pin 120a.

Bushing 130a is also retained in barrel 122a and retains outer conductor 206a. Thereby, the outer conductor 206a and the barrel 122a are insulated.

Also, the upper end of the measuring pin 120a is in contact with the lower end of the central conductor 204a. Also, the central conductor 204a and the outer conductor 206a are electrically connected by a connecting member 212a. Therefore, the measuring pin 120a is electrically connected to the center conductor 204a and the outer conductor 206a of the coaxial cable 202a.

According to the inspection connector 100a, for the same reason as the inspection connector 100, the loss of the inspection unit 10 is small and the coaxial cable 202a can be flexibly deformed.

By the way, FIG. 6 is a cross-sectional view of the lower portion of an inspection connector 100b according to a modification. As shown in FIG. 6, the measurement pin 120a does not have to be electrically connected to the center conductor 204a as long as it is electrically connected to the outer conductor 206a.

(Other embodiments)
Note that the configurations of the inspection connectors 100, 100a, and 100b may be combined arbitrarily.

A high-frequency signal having a relatively low frequency (a high-frequency signal having a frequency of 15 MHz or less) is applied to the measuring pins 120a of the inspection connectors 100, 100a, and 100b. However, a DC signal may be applied to the measurement pins 120a of the inspection connectors 100, 100a, 100b.

In addition, in the inspection unit 10 and the inspection connector 100, the measurement pins 120a are connected to the terminals 302a of the connector 300 while projecting downward. However, after the plunger 102 is connected to the connector 300, the measuring pin 120a may protrude downward.

10, 10a: inspection units 100, 100a, 100b: inspection connector 102: plunger 104: housing 106: flanges 108, 1208a: spring 110: spacers 120a, 120b: measuring pins 122a, 122b: barrels 124a, 124b, 126a, 126b, 128a, 130a: bushings 200a, 200b: external connectors 202a, 202b: coaxial cable 204a: center conductor 205a: center conductor exposed portion 206a, 206b: outer conductor 207a: outer conductor exposed portion 208a: insulator 210a: coating 212a: Connection member 300: Connectors 302a to 302d: Terminal 1202a: Cylindrical portion 1204a: Lower pin 1206a: Upper pin

Claims (11)

An inspection connector connected to an end of a coaxial line portion comprising a central conductor, an outer conductor surrounding the central conductor, and a first insulator insulating the central conductor and the outer conductor ,
a plunger made of metal that holds the coaxial line portion in a state of being insulated from the outer conductor, the plunger having a through hole extending along the extending direction of the coaxial line portion;
a measuring pin that is insulated from the plunger and supported by the plunger, the measuring pin being inserted through the through hole;
with
The outer conductor of the coaxial line portion, wherein the measuring pin includes the central conductor, the outer conductor surrounding the central conductor, and the first insulator insulating the central conductor and the outer conductor. is electrically connected to
a barrel retained by the plunger;
a second insulating member retained on the barrel and retaining the measuring pin;
a third insulating member held by the barrel and holding the outer conductor;
further comprising
Inspection connector. An inspection connector connected to an end of a coaxial line portion comprising a central conductor, an outer conductor surrounding the central conductor, and a first insulator insulating the central conductor and the outer conductor ,
a plunger made of metal that holds the coaxial line portion in a state of being insulated from the outer conductor, the plunger having a through hole extending along the extending direction of the coaxial line portion;
a measuring pin that is insulated from the plunger and supported by the plunger, the measuring pin being inserted through the through hole;
with
The outer conductor of the coaxial line portion, wherein the measuring pin includes the central conductor, the outer conductor surrounding the central conductor, and the first insulator insulating the central conductor and the outer conductor. is electrically connected to
a barrel holding the measuring pin and the outer conductor;
further prepared,
the measurement pin is electrically connected to the outer conductor through the barrel;
Inspection connector. A high-frequency signal having a frequency of 15 MHz or less is applied to the measurement pin,
The inspection connector according to claim 1 or 2 . The measurement pin is a terminal to which a DC signal is applied,
The inspection connector according to claim 1 or 2 . The measurement pin is a terminal electrically connected to the outer conductor and the central conductor,
The inspection connector according to any one of claims 1 to 4 . The barrel is a cylindrical conductor,
the barrel is provided with a hole;
The connector for inspection according to claim 2 . The inspection connector is
a first insulating member retained by the plunger and retaining the barrel;
further prepare,
The inspection connector according to claim 2 or 6 . The coaxial line portion further comprises a second insulator surrounding the outer conductor,
Young's modulus of the second insulator is greater than Young's modulus of the first insulator,
The inspection connector according to any one of claims 1 to 7 . The measuring pin has a bar shape,
The inspection connector according to any one of claims 1 to 8 . A signal is applied to the outer conductor,
The inspection connector according to any one of claims 1 to 9 . a coaxial line portion including a central conductor, an outer conductor surrounding the central conductor, and a first insulator insulating the central conductor and the outer conductor;
an inspection connector according to any one of claims 1 to 10 , which is connected to an end portion of the coaxial line portion;
comprising
inspection unit.

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