KR100650307B1 - a coxial contect probe - Google Patents

Abstract

The present invention relates to a coaxial contact probe, comprising: an inner plunger portion having a plunger elastically up and down disposed at a lower portion thereof and electrically connected to an internal conductor of a coaxial wire; An outer plunger portion having a ground plunger elastically floating up and down at a lower portion of the inner plunger portion, the outer plunger portion being electrically connected to an outer conductor of the coaxial wire; A cylindrical outer body surrounding the outer plunger portion, an outer head coupled to a lower portion of the outer plunger and having a plurality of expansion grooves formed in an axial direction at a lower end thereof, an outer spring fitted to the outer body outside the upper head, and the outer With the technical gist of the present invention, the electrical connection with the inspection object contact terminal can be made sequentially after the stable mounting of the inspection object housing is made. The present invention relates to a coaxial contact probe that can further improve inspection reliability, and that end portions of the plunger and the ground plunger are safely accommodated and protected in the outer cylinder to further improve device life and to be easily managed.

Coaxial Coaxial Probe Ground Plunger Impedance

Description

Coaxial Contact Probe

1-longitudinal section view of a coaxial contact probe assembly according to the prior art;

Figure 2-Longitudinal sectional view showing one embodiment of a coaxial contact probe according to the present invention.

3-bottom view of FIG.

4-A front view showing the installation on the object.

5 is a front view showing a state of use electrically connected to an object.

<Description of Major Symbols Used in Drawings>

10: housing 20: internal contact terminal

30: external contact terminal 40: coaxial wire

41: inner conductor 42: outer conductor

100: inner plunger 110: inner body

120: plunger 130: inner spring

140: internal terminal 200: external plunger

210: middle body 211: recessed groove

220: ground plunger 230: middle spring

240: external terminal 300: outer tube

310: outer body 311: through hole

320: external head 321: expansion groove

322: locking projection 330: outer spring

340: bush 350: fixed pin

400: insulator

The present invention relates to a coaxial contact probe, and more particularly, to a coaxial contact probe to electrically and stably connect the coaxial wire and the contact terminal of the inspection object to obtain a reliable test results.

The coaxial wire consists of a central conductor placed on the central axis, a plastic insulator on it, and a long cylindrical outer shield that confines the electrical and magnetic fields into the tube. The conductor and the inner conductor form concentric circles, and the concentric structure makes it possible to receive much less electrical interference than general electric wires.

The use of coaxial wires makes it possible to more reliably deliver the electrical information of inspection objects that require precise electrical and electronic information inspection, such as test equipment and analyzers, so that the coaxial wires can be stably connected to the contact terminals of the inspection objects. There has been a need for development of coaxial contact probes that can be used repeatedly and repeatedly.

As such a prior art, the electrical contact system of Korean Patent Application Publication No. 10-2001-7006465 will be briefly described. 1 is a longitudinal sectional view of the prior art.

The prior art provides a conductive inner contact assembly electrically connected to an inner signal conductor of a coaxial cable, a conductive ground plunger in which the inner contact assembly is disposed within a longitudinally extending aperture, and electrically connects the inner contact assembly and the ground plunger. And an interface element fixedly mounted on an outer ground conductor of the coaxial cable and electrically engaged with the ground plunger, wherein the interface element and the ground sleeve are disposed in an outer barrel. Is fixedly attached to the outer barrel, and the ground sleeve has a structure that is slidably received in the outer barrel.

However, in the probe, the interface element is fixedly attached to the outer barrel, so that if the outer barrel is brought close to the contact terminal of the inspection object while current flows through the coaxial cable, the probe may not be stably fixed at the designated position. The internal contact assembly and the ground plunger are first contacted with the contact terminals of the inspection object, resulting in unstable current flow. Therefore, if the inspection is to be performed stably, the current of the coaxial cable must be adjusted on and off for each inspection object. There was discomfort.

In addition, as the inner contact assembly and the ground plunger have an initial shape protruding out of the outer barrel, the lower ends of the inner contact plunger and the ground plunger, which may have a great influence on the inspection reliability, may be affected by the external load. There was a problem that can be easily bent or damaged.

In order to solve the problems described above, the present invention, the stable mounting on the inspection object housing and the electrical connection with the inspection object contact terminal can be made in sequence, the plunger and the ground directly connected to the inspection object An object of the present invention is to provide a coaxial contact probe having a structure capable of safely receiving and protecting an end of a plunger.

The present invention for achieving the above object is provided with a plunger which is elastically up and down in the lower portion, the inner plunger portion electrically connected to the inner conductor of the coaxial wire; An outer plunger portion having a ground plunger elastically floating up and down at a lower portion of the inner plunger portion, the outer plunger portion being electrically connected to an outer conductor of the coaxial wire; A cylindrical outer body surrounding the outer plunger portion, an outer head coupled to a lower portion of the outer plunger and having a plurality of expansion grooves formed in an axial direction at a lower end thereof, an outer spring fitted to an outer side of the outer body above the outer head, and the outer The coaxial contact probe comprising a; a cylindrical bush provided with a cylindrical bush fitted to the outer body at the top of the spring to the technical gist.

Here, the outer cylinder portion, the inner end is fixed to the upper portion of the outer plunger portion, through the through-hole formed in the outer body, the outer end portion is fixed to the restrained coupled to protrude out of the bush; The through hole formed in the outer body is preferably formed in a b-shape.

In addition, the lower end of the outer head, it is preferable that the lower end is formed with a protrusion of the upward inclined shape toward the outside.

The probe may include: an intermediate body spaced apart from the inner plunger portion with an insulator, and having a recessed groove formed on the outer circumference thereof to receive a protrusion formed on the ground plunger of the outer plunger portion to form a limit of movement upward and downward; It is preferable to include the embodiment configured to include.

The outer plunger portion may include: a ground plunger disposed between the intermediate body and the outer body in a cylindrical shape having a top and bottom open, and having a plurality of protrusions at a lower end thereof; An intermediate spring installed between the intermediate body and the outer body above the ground plunger; It is preferable to include an embodiment configured to include; an external terminal fixed to the intermediate body on the upper side of the intermediate spring, the outer terminal is coupled to the outer conductor of the coaxial wire.

In addition, the inner plunger portion, the inner body of the cylindrical upper and lower open; A plunger installed to protrude downward from the inner body and having a plurality of protrusions formed at a lower end thereof; An inner spring received in the inner body above the plunger; It comprises an embodiment comprising a; forming a top coincides with the intermediate body and fixed to the inner body upper portion, the receiving groove in which the inner conductor of the coaxial wire is received is formed at the top; desirable.

Therefore, after the stable mounting of the inspection object housing is made, the electrical contact with the inspection object contact terminal can be made in sequence, thereby improving the inspection reliability.

In addition, there is another advantage that the ends of the plunger and the ground plunger are securely accommodated and protected in the outer cylinder portion to further improve device life and to be easy to manage.

In addition, there is another advantage that the connection can be made every time at a constant contact pressure with a plurality of inspection objects by an operation of moving, stopping and returning the fixing pin.

In addition, there is another advantage that the connection between the coaxial wire in the internal terminal and the external terminal can be made clearly and easily.

The present invention having the configuration as described above will be described in detail with reference to the following drawings. Figure 2 is a longitudinal sectional view showing one embodiment of a coaxial contact probe according to the present invention, Figure 3 is a bottom view of Figure 2, Figure 4 is a front view showing the installation on the object, Figure 5 is electrically connected to the object It is a front view which shows the connected use state.

The coaxial contact probe according to the present invention is a contact-mediated assembly used to inspect an impedance of an object to be inspected using a coaxial wire having an inner signal conductor and an outer ground conductor. The plunger 120 elastically moves up and down. Is provided at the contact end with the inspection object and the other end is insulated outside the plunger 120 and the inner plunger part 100 electrically connected to the inner conductor 41 of the coaxial wire. In the probe comprising a ground plunger 220 elastically connected to the inspection object and the other end includes an outer plunger portion 200 electrically connected to the outer conductor 42 of the coaxial wire, the inner plunger The outer cylinder portion 300 accommodating the portion 100 and the outer plunger portion 200 is composed of an outer body 310, an outer head 320, an outer spring 330, and a bush 340 so that the housing 10 of the object to be inspected. See) It may be defined to be mounted, to one so that they have a performance test of uniform quality.

The outer body 310 surrounds the outside of the components of the outer plunger portion 200 in a cylindrical shape, prevents and restrains the outer body, and the outer plunger portion 200 is movable from inside to up and down. No bond is made.

The outer head 320 is a component seated and connected to the housing 10 of the inspection object, and the outer body 310 extends to the bottom of the plunger 120 of the inner plunger portion and the ground plunger 220 of the outer plunger portion. The outer body 310 is coupled to protrude to the lower side from the outside.

The outer spring 330 is fitted to the outer body 310 outside the outer head 320, the cylindrical bush 340 is fitted to the outer body 310 above the outer spring 330, The outer head 320 and the outer body 310 is in a state of being elastically connected to each other by the outer spring 300.

When the bush 340 is held close to the inspection object side, an impact force generated by a collision with the housing 10 at the moment when the lower end of the outer head 320 is connected and mounted on the housing 10 of the inspection object. The external spring 330 is elastically contracted to cancel and offset, it can be stably connected to the inspection object without damage even in repeated use.

In addition, when the plurality of expansion grooves 321 having a length in the axial direction at the lower end of the outer head 320 is formed, the width of the expansion grooves 321 and the outer head by pressing the outer head 320 from the outside (320) It can be easily introduced into the housing 10 by reducing the outer diameter of the end, the lower end of the outer head 320 is introduced into the housing 10, the lower end surface is obliquely upwards toward the outside Forming the group 322 may smoothly slide downwards even when the end is in contact with the housing 10 during introduction into the housing 10.

After the introduction of the outer head 320 into the housing 10, the expansion groove 321 is returned and expanded as shown in FIG. 4 by releasing the pressing force that pressurizes the outer head 320 from the outside. As the outer diameter of the outer head 320 is matched with the through diameter of the housing 10, and the upper end of the locking projection 322 is held in the inner end of the housing 10, the outer It can be stably mounted on the housing 10 by an operation of releasing the pressure after approaching the inspection object side while pressing the circumference of the head 320.

When the outside of the housing 10 is separated, the external head 320 is urged again so that the outer diameter of the locking protrusion 322 is smaller than the penetration diameter of the housing 10 so that the expansion groove 321 and the outside are outside. The head 320 may be pulled out while the diameter of the head 320 is reduced.

If the through body 311 is formed in the outer body 310, and the fixing pin 350 for connecting the bushing 240 and the outer plunger portion 200 across the through hole 311, In the state in which the outer head 320 is seated on the housing 10, the up and down movement and stop of the outer plunger portion 200 may be adjusted using the bushing 340 or the fixing pin 350.

Upper components of the bushing 340 and the outer plunger portion 200 are respectively constrained to the outer and inner end portions of the fixing pin 350, so that the outer body through-hole 311 is formed at the outermost side. As the bushing 340 positioned is moved and rotated, the upper component of the outer plunger 200 is also moved and rotated with the same displacement.

When the fixing pin 350 is installed to protrude to the outside of the bush 340, pressure adjustment of the protrusion of the fixing pin 350 is required without adjusting the pressing force directly to the bush 340. The upper component of the outer plunger portion 200 can be easily moved and adjusted.

When the through-hole 311 of the outer body is formed in a b-shape, the outer plunger portion is moved by a predetermined distance to the lower end of the through-hole 311 as shown in FIG. (200) and the like can be connected to the contact terminals (20, 30) of the inspection object at a constant contact pressure, and if moved to the lateral direction and stopped, the contact pressure is kept as it is without constantly applying a downward pressure to the fixing pin (350) The retaining pin 350 may be easily adjusted to be separated from the inspection object by returning the fixing pin 350 to the upper end of the through hole 311.

In the coaxial contact probe according to the present invention, the mounting on the inspection object housing 10 is first stabilized by the elastic structure of the outer cylinder portion 300 or the outer diameter stretching structure of the outer head 320, and then the bush 340. By moving the fixing pin 350 to) the electrical contact with the test object contact terminals 20 and 30 can be made sequentially, the inner plunger portion 100, the outer plunger portion 200, the outer cylinder portion 300 As the impact force generated at each contact end is absorbed and canceled by the elastic element, inspection reliability and device life can be further improved.

In the embodiment of the present invention shown in Figure 2 between the inner plunger 100 and the outer plunger 200 is provided with a cylindrical intermediate body 210, the intermediate body 210 is the inner plunger ( 100 is electrically disconnected from the inner plunger portion 100 but is structurally connected to the components of the inner plunger portion 100 so that the insulator 400 is moved and stopped at the same displacement. do.

On the outer circumference of the intermediate body 210, a recessed groove 211 is formed to receive a protrusion formed in the ground plunger 220 of the outer plunger portion to form a limit of movement of the ground plunger 220 up and down. While providing a binding margin to the plunger 220, the moving margin corresponding to the height of the recessed groove 211 is provided.

In the embodiment, the outer plunger portion 200 is confined between the intermediate body 210 and the outer body 310 from the lower side to the ground plunger 220, the intermediate spring 230, the external terminal 240 The inner plunger part 100 has a cylindrical inner body 110 having an upper and lower openings connected to the intermediate body 210 with the insulator 400 and constrained to the inner body 110. It has a configuration consisting of the plunger 120, the inner spring 130, the inner terminal 140 from the lower side.

The ground plunger 220 of the outer plunger portion is a component that makes direct contact with the external contact terminal 30 of the inspection object, and a plurality of protrusions are formed at the lower end thereof, and the outer terminal 240 is the intermediate spring 230. The coupling between the ground body and the ground plunger 220 is fixed to the intermediate body 210, the outer conductor 42 of the coaxial wire 40 is received on the inner peripheral surface.

The plunger 120 of the inner plunger part is a component that makes direct contact with the internal contact terminal 20 of the inspection object, and has a plurality of protrusions provided at a lower end thereof to protrude downward from the inner body 110. The terminal 140 is fixedly coupled to the upper portion of the inner body 110 from the upper side of the plunger 120 with the inner spring 130 therebetween, and the inner conductor 41 of the coaxial wire 40 is formed on the inner circumferential surface thereof. It is receptive to

The inner terminal 140 forms an upper end coinciding with the intermediate body 200 and the insulator 400 and is coupled to an inner circumference of the outer terminal 240, and an inner circumferential surface of the outer terminal 240 and an intermediate body. The upper portion of the insulator 400 and the inner circumferential surface of the inner terminal 140 form a space portion in which two cylinders of different diameters are coaxially communicated with each other, and thus, the inner conductor of the inner portion is formed. The connection with the coaxial wire 40 in which the 41 is protruded from the outer conductor 42 on the outer side is clearly made.

When the front end of the coaxial wire 40 is received and coupled to the inside of the cylinder formed by the outer terminal 240 and the terminal 140 from the inside, the inner conductor 41 and the outer conductor 42 of the coaxial wire are the inside. Independently connected to the terminal 140 and the external terminal 24, the inner plunger portion 100 is in the inner conductor 41 of the coaxial wire, the outer plunger portion 200 is outside the coaxial wire Each of these is related to the electrical connection with the conductor 41.

Since the inner terminal 140 and the outer terminal 240 are insulated from each other by the insulator 400 but are structurally connected integrally, the outer terminal using the bush 304 to the fixing pin 350 is provided. When the movement of the 240 is adjusted, the terminal 140 is also moved in the same displacement and is operated in cooperation with each other.

According to the present invention having the above-described configuration, after the stable mounting of the inspection object housing is made, electrical connection with the inspection object contact terminal can be made sequentially, thereby improving the inspection reliability.

In addition, there is another effect that the ends of the plunger and the ground plunger are safely accommodated and protected in the outer cylinder portion to further improve the life of the apparatus and to facilitate the management.

And, there is another effect that the connection can be made every time at a constant contact pressure with a plurality of inspection objects by the operation of moving, stopping, returning the fixing pin.

In addition, there is another effect that the connection between the coaxial wire in the internal terminal and the external terminal can be made clearly and easily.

Claims (7)

An inner plunger portion having a plunger elastically up and down disposed at a lower portion thereof and electrically connected to an inner conductor of the coaxial wire; An outer plunger portion having a ground plunger elastically floating up and down at a lower portion of the inner plunger portion, the outer plunger portion being electrically connected to an outer conductor of the coaxial wire; A cylindrical outer body surrounding the outer plunger portion, an outer head coupled downwardly to the outer body to receive the lower portion of the inner plunger portion and the outer plunger portion, and fitted to the outer body outside from the outer head side; And an outer cylinder having an outer spring and a cylindrical bush fitted to the outer body at an upper side of the outer spring. The method of claim 1, wherein the outer cylinder portion, And a fixing pin having an inner end fixed to an upper portion of the outer plunger portion and penetrating through a through hole formed in the outer body, the outer pin being restrained to protrude to the outside of the bush. The method of claim 2, wherein the through hole formed in the outer body, Coaxial contact probe, characterized in that formed in the shape. The method of claim 1, wherein the outer head, A plurality of expansion grooves are formed in the lower end in the axial direction, coaxial contact probe, characterized in that the bottom surface is formed with a protrusion of the upward inclined shape toward the outside. The method of claim 1, wherein the probe, A middle body spaced apart from the inner plunger portion with an insulator, and having recessed grooves formed therein, the upper and lower recesses receiving protrusions formed on the ground plunger of the outer plunger portion to form upper and lower movement limits; Coaxial contact probe. The method of claim 5, wherein the outer plunger portion, A ground plunger installed between the intermediate body and the outer body in a cylindrical shape having a top and bottom open, and having a plurality of protrusions formed at a lower end thereof; An intermediate spring installed between the intermediate body and the outer body above the ground plunger; And an external terminal fixedly coupled to the intermediate body at the upper side of the intermediate spring, the external terminal receiving and coupling the external conductor of the coaxial wire. The method of claim 5 or 6, wherein the inner plunger portion, A cylindrical inner body with an upper and lower opening; A plunger installed to protrude downward from the inner body and having a plurality of protrusions formed at a lower end thereof; An inner spring received in the inner body above the plunger; Coaxial contact probe characterized in that it comprises a; forming a top coincides with the intermediate body and fixed to the upper portion of the inner body, the inner groove is formed on the upper end of the receiving groove to accommodate the inner conductor of the coaxial wire; .

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