KR101153166B1 - Coaxial Cable Assembly Without Need to Use Connector - Google Patents

Abstract

The cable assembly according to the invention comprises at least one coaxial cable having a center conductor and an outer conductor having the same axis as the center conductor and a dielectric between the center conductor and the outer conductor, the first end of the coaxial cable being inserted into contact with the circuit board. And a substrate contact block having a connecting surface. The center conductor and the outer conductor of the coaxial cable are exposed on the connection surface of the board contact block. It is also possible to comprise a board | substrate contact block including a shaping | molding die, the shaping | molding resin part accommodated in this shaping | molding die, and an elastic connection part. Here, the elastic connection part may be implemented in a structure in which a conductor pattern or a fine gold wire is disposed on an elastic body such as silicone rubber.

Since the cable assembly of the present invention does not require a connector for electrically connecting to the circuit board, production costs are reduced, free from problems caused by damage or breakage of the connector, and no signal loss due to the connector, and multiple coaxial cables Even if it is necessary to connect to the circuit board at the same time, the connection work can be made very easy, there is no need to apply excessive force, and the arrangement density of the coaxial cable can be increased.

Description

Coaxial Cable Assembly Without Need to Use Connector

1 is a perspective view of a cable assembly according to a first embodiment of the invention.

Figure 2A is a cross-sectional view showing the process of mounting the cable in the upper and lower molds as a manufacturing process of the cable assembly according to the first embodiment of the present invention.

Figure 2B is a cross-sectional view showing a process of injecting a resin into the cavity of the upper and lower molds as a manufacturing process of the cable assembly according to the first embodiment of the present invention.

2C is a schematic perspective view showing a process of cutting a molded product separated from a mold as a manufacturing process of a cable assembly according to a first embodiment of the present invention;

3 is a perspective view of a cable assembly according to a second embodiment of the invention.

4A-4J illustrate a method of making a cable assembly according to a second embodiment of the present invention.

5A and 5B are plan views showing examples of patterns of circuit boards that can be electrically connected with the cable assemblies of the present invention.

6 is a cross-sectional view and a partially enlarged view showing the electrical connection between the cable assembly and the circuit board according to the second embodiment of the present invention.

7A and 7B are cross-sectional views showing the structure of a PCR suitable for use in the present invention.

8A-8I are perspective views showing the structure and method of manufacturing the cable assembly according to the third embodiment of the present invention.

9A and 9I are perspective views showing a structure and a manufacturing method of a cable assembly according to a fourth embodiment of the present invention.

The present invention relates to a coaxial cable assembly, and more particularly to a coaxial cable assembly of a novel structure that does not require a conventional connector for electrical connection with the circuit board.

To electrically connect the coaxial cable to the circuit board, connect a connector at one end of the coaxial cable, install a female connector for this connector on the circuit board, and then connect the connector and female connector of the coaxial cable to connect the electrical signal through the coaxial cable. Is usually provided to the wiring of the circuit board. As such, since the connector must be used in the related art, a cost as much as the connector is required and a process of connecting the cable is required, and signal loss due to the connection structure of the connector and the cable cannot be avoided.

On the other hand, when several strands of coaxial cable need to be connected to one circuit board at the same time, for example, when a plurality of signals for inspecting the electrical characteristics of a semiconductor device must be supplied to the circuit board through the coaxial cable, the coaxial cable with a large force Must be connected to the female connector on the circuit board. At this time, the wear of the connector may occur during the mechanical coupling process of the coaxial cable connector and the female connector, and if the correct alignment is not made, the connector may be damaged.

SUMMARY OF THE INVENTION The present invention provides a cable assembly of an entirely new structure that does not require the use of a connector in order to overcome the problems of the prior art of providing electrical connection of coaxial cables using connectors.

The cable assembly according to the invention comprises at least one coaxial cable having a center conductor and an outer conductor having the same axis as the center conductor and a dielectric between the center conductor and the outer conductor, the first end of the coaxial cable being inserted into contact with the circuit board. And a substrate contact block having a connecting surface. The center conductor and the outer conductor of the coaxial cable are exposed on the connection surface of the board contact block.

It is also possible to comprise a board | substrate contact block including a shaping | molding die, the shaping | molding resin part accommodated in this shaping | molding die, and an elastic connection part. Here, the elastic connection part may be implemented in a structure in which a conductor pattern or a fine gold wire is disposed on an elastic body such as silicone rubber.

First embodiment

1 is a perspective view of a cable assembly according to a first embodiment of the present invention.

The cable assembly 10 of the present invention includes a plurality of coaxial cables 20 and a substrate contact block 30. The coaxial cable 20 is composed of a sheath 22 forming an outer appearance of the cable, an outer conductor 24, a dielectric 26, and a center conductor 28. The center conductor 28 is a signaling conductor and the outer conductor 24 is a grounding conductor. The first end 25 of the coaxial cable 20 is inserted into the substrate contact block 30 and a connector 40 is connected to the second end 27 opposite the first end 25. Although FIG. 1 shows that the connector 40 is connected to the second end 27, it is also possible to insert the second end 27 into another substrate contact block. That is, in the structure shown in FIG. 1, the first end 25 of the cable assembly 10 is electrically connected to the outside in a manner according to the invention, and the second end 27 is electrically connected to the outside in a conventional manner. It is a structure.

The substrate contact block 30 is, for example, an insulator made of epoxy resin. It is also possible to construct the substrate contact block 30 from a material having elasticity. Although the substrate contact block 30 having a rectangular parallelepiped shape is shown in FIG. 1, the substrate contact block 30 is not necessarily configured as such a shape, and the substrate contact block 30 may be implemented in various shapes. The substrate contact block 30 includes a connecting surface 32 which wraps around the first end 25 of the various coaxial cables 20 and exposes the end surface of the first end 25. The connecting face 32 must be flat, so that the exposed end faces of the various coaxial cables 25 lie in the same plane.

In the cable assembly 10 according to the first embodiment of the present invention, since the ground conductor 24 and the center conductor 28 of the coaxial cable 20 are exposed on the connection surface 32 of the substrate contact block 30. The coaxial cable can be electrically connected to the circuit board by contacting the connection surface 32 with the signal pattern surface of the circuit board (not shown). The ground conductor 24 and the center conductor 28 exposed through the connection surface 32 of the substrate contact block 30 are surface plated with a metal having excellent electrical conductivity, for example, gold.

The manufacturing process of the cable assembly 10 according to the first embodiment will be described with reference to FIGS. 2A-2C. Shown in FIGS. 2A-2C is a method of manufacturing cable assembly 10 by insert molding.

Referring to FIG. 2A, a plurality of coaxial cables 20 are aligned between the lower mold 60 and the upper mold 70. The lower mold 60 and the upper mold 70 are connected by clamping rods 62 for vertical vertical movement. The lower mold 60 is provided with a plurality of lower cavities 65, and the upper mold 70 is provided with an upper cavity 75 which is paired with the lower cavity 65. An injection part 72 is connected to the upper mold 70, and the injection part 72 is connected to an injection path 74 connected to each upper cavity 75.

The clamping rod 62 is raised to separate the upper and lower molds 60 and 70, and then the plurality of coaxial cables 20 are aligned on the upper surface of the lower mold 60. At this time, the coaxial cable 20 should be aligned so that the coaxial cable 20 passes through the lower cavity 65.

Referring to FIG. 2B, the clamping rod 62 is lowered to engage the lower mold 60 and the upper mold 70, and then the injection portion 72 and the injection into the cavity 65/75 in the closed space. The resin 30a is injected through the furnace 74. The resin 30a is injected into the cavities 65 and 75 in a high temperature molten state to surround the coaxial cable 20 passing through the cavity.

Referring to FIG. 2C, the resin 30a is cured and then separated from the upper and lower molds 60 and 70 to form the substrate contact block 30, and the cutting line 82 is formed using, for example, a wheel 80 rotating at high speed. The substrate contact block 30 and the coaxial cable 20 are cut along the substrate contact block 10 shown in FIG.

Second embodiment

3 is a perspective view of a cable assembly according to a second embodiment of the invention.

The cable assembly 100 according to the second embodiment includes a plurality of coaxial cables 20 and a substrate contact block 180 into which the first end 25 of the coaxial cable 20 is inserted.

Since the configuration of the coaxial cable 20 is the same as in the first embodiment, the same reference numerals are used and detailed description thereof will be omitted.

The substrate contact block 180 includes a molding die 110, a molding resin portion 130 and an elastic connecting portion 160 accommodated in the molding die 110. The elastic connecting portion 160 is composed of a base 140 and the elastic block 150.

The manufacturing method of the cable assembly 100 according to the second embodiment will be described with reference to FIGS. 4A to 4J.

The plurality of cables 20 are aligned with the mold 110 (FIG. 4A). The cavity 112 through which the cable 20 passes is formed in the center portion of the mold 110. The cavity 112 is then filled with the molding liquid such that the molding liquid surrounds the plurality of coaxial cables 20 passing through the cavity 112. At this time, the molding liquid is preferably filled in the cavity 112 so that the upper surface of the molding liquid coincides with the upper surface of the molding die 110. The molding liquid 112 is cured to form the molding resin portion 130 (FIG. 4B). For example, the mold 110 and the molded resin part 130 are cut by the wheel 80 traveling in the direction of the arrow of FIG. 4C while rotating at a high speed. In this way, two molds / molding resin parts 110/130 may be made of one mold 110, and terminal surfaces 135 are formed at one end of each structure 100/130.

Apart from the process of FIGS. 4A-4C, the base 140 of the structure shown in FIG. 4D is prepared. The through part 142 is formed at the center of the base 140. And the elastic block 150 shown in FIG. 4E is prepared. A plurality of conductive patterns 154 and 158 are formed on the first surface 152 of the elastic block 150, and the opposite surface of the first surface 152 is fitted to the through part 142 of the base 140. It becomes the structure that becomes. As shown in FIG. 4F, when the base 140 and the elastic block 150 are aligned and combined, the elastic connecting portion 160 shown in FIG. 4G is formed.

The elastic connecting portion 160 and the structure 170 are coupled to each other such that the first surface 152 of the elastic connecting portion 160 and the terminal surface 135 of the molding frame / molding resin portion structure 170 face the same direction (FIG. 4H) completes the cable assembly 100 as shown in FIG. 4I.

The process of connecting the cable assembly 100 with the circuit board 90 is as shown in FIG. 4J. The pattern surface 95 of the circuit board 90 and the terminal surface 135 of the structure 170 and the first surface 152 of the elastic connecting portion 160 are aligned so as to face each other.

The signal line patterns 92 and 94 of the circuit board 90 are as shown in FIG. 5A or 5B. The example shown in FIG. 5A is a case where the signal line pattern of the circuit board is not on the substrate surface but in the inner layer, and the pattern shown in FIG. 5B is a case where the signal line pattern is exposed on the surface of the circuit board.

6 is a partially enlarged cross-sectional view illustrating the electrical connection between the cable assembly 100 and the circuit board 90.

As shown in FIG. 6, the jig 190 is used to engage the cable assembly 100 and the circuit board 90. The elastic block 150 of the elastic connecting portion 160 is pressed by the engagement force of the jig 190, and as a result, the first conductor pattern 154 and the second conductor pattern 158 protrude upward and downward. The protruding first conductor pattern 154 electrically connects the outer conductor 24 of the coaxial cable 20 and the grounding pattern 92 of the circuit board 90, and the second conductor pattern 158 is the coaxial cable. The center conductor 28 of 20 and the signal pattern 94 of the circuit board are electrically connected.

7A and 7B show the internal structure of an elastomer block 150 suitable for use in the cable assembly 100 according to the second embodiment of the present invention.

7A is a cross-sectional view of the elastic block 150 applied to FIG. 6. For example, the conductor pattern layers 154 and 158 are formed by arranging a conductor (for example, gold powder) in a predetermined region on the silicon rubber layer 152. Structure.

The elastic body block 150A shown in FIG. 7B has a structure in which the fine gold wire 150 is arranged at a predetermined interval d1 on the silicon rubber layer 152A. The fine gold wire 150 is disposed in an inclined structure between the top surface and the bottom surface of the silicon rubber layer 152A, in which case the inclination distance d2 should be smaller than the distance a between the pattern layers of FIG. 7A. On the other hand, it is also possible to arrange the fine gold wire 150 in a vertical structure rather than inclined structure. When the elastic block 150A including the fine gold wire is used as shown in FIG. 7B, when the elastic connecting portion 160 and the circuit board 90 are aligned, the alignment operation for matching the conductor pattern with the corresponding signal pattern is easy.

Third embodiment

8A to 8I are perspective views showing a structure and a manufacturing method of a cable assembly according to a third embodiment of the present invention.

A plurality of coaxial cables 20 are mounted in the cavity 112 of the molding die 110 (FIG. 8A), and the molded resin portion 130 is formed (FIG. 8B). The molding die 110 and the molding resin part 130 are cut first (FIG. 8C), and the molding die 110 and the molding resin part 130 are cut secondly in a direction perpendicular to the primary cutting direction. 137) (FIG. 8D). As shown in FIG. 8D, the coaxial cable 20 has a long exposed outer conductor 24 and a center conductor 28 through the second cut molded resin portion 130.

An elastic connecting portion 260 having a conductor pattern 262 corresponding to the exposed outer conductor 24 and the center conductor 28 is attached to the secondary cut surface of the molded resin portion 130 (FIG. 8F), and the housing 270 ) To complete the cable assembly according to the third embodiment.

The cable assembly shown in FIG. 8F may be contacted with the circuit board to electrically connect the coaxial cable to the circuit board. On the other hand, two cable assemblies having the same structure as shown in Figs. 8G to 8I may be combined and a circuit board may be inserted therebetween.

Fourth embodiment

9A to 9I are perspective views showing a structure and a manufacturing method of the cable assembly according to the fourth embodiment.

Referring to FIG. 9A, the coaxial cable 300 is bent 180 degrees or 90 degrees and then the coaxial cable 300 is cut at the bent portion 303. The outer conductor 304 and center conductor 308 of the coaxial cable 300 are exposed through the cut first end 305.

The two coaxial cables 300 thus prepared are inserted into the cavity 312 of the molding die 310 (FIG. 9B), and molding resin is injected into the cavity 312 to form the resin molding portion 330 (FIG. 9C). ). Then, the mold 310 and the resin molding 330 are first cut as shown in FIG. 9D to obtain two structures 340A and 340B. The step 345 is formed by second cutting the mold 310 and the resin molding 330 in the direction perpendicular to the first cut of the structure 340A. The center conductor 308 and the outer conductor 304 of the coaxial cable 300 are exposed through the resin molded portion 330 cut secondary. An elastic connecting portion 350 having a first conductor pattern 354 and a second conductor pattern 358 is coupled to the secondary cut structure 340A as shown in FIG. 9F.

After preparing the base 360 having the receiving portion 362, the cable penetration portion 364, and the spring 366 (FIG. 9G), the structure 340A to which the elastic connecting portion 350 is coupled is mounted on the base 360. To complete the cable assembly 370A (FIG. 9H).

One cable assembly 370A may be connected to the circuit board 390. The circuit board 390 may be inserted between the pair of cable assemblies 370A and 370B as shown in FIG. 9I to connect the coaxial cable 300 to the circuit board. 390 may be connected.

Variation Embodiment

Although the substrate contact block has been described above as being formed of a molding resin, the substrate contact block cannot be made of only the molding resin. For example, the substrate contact block may be made of an insertion portion into which a coaxial cable can be inserted and a structure in which the insertion portion can be opened and closed. When the coaxial cable is inserted into the insertion part with the insertion part open, and then the insertion part is pinched to fix the coaxial cable, the same effect as that of the coaxial cable is inserted into the molding resin.

In addition, although the drawing shows a cable assembly including a plurality of coaxial cables, it is also possible to apply the spirit of the present invention to a single coaxial cable, which is included in the technical scope of the present invention.

Since the cable assembly according to the present invention does not require a connector for electrically connecting with the circuit board, production costs are reduced, free from problems due to damage or breakage of the connector, and no signal loss due to the connector occurs. In addition, even when several coaxial cables must be connected to the circuit board at the same time, the connection work can be made very easy and there is no need to apply excessive force. And since there is no need to configure a connector in the cable assembly, the arrangement density of the coaxial cable can be increased.

Claims (3)

Cable assembly, At least one coaxial cable having a center conductor and an outer conductor having the same axis as the center conductor and a dielectric between the center conductor and the outer conductor, A substrate contact block into which the first end of the coaxial cable is inserted and having a contact surface in contact with the circuit board, The center and outer conductors of the coaxial cable are exposed on the connection surface, And the substrate contact block includes a molding die, a molding resin portion and an elastic connecting portion accommodated in the molding die. In claim 1, And the substrate contact block is formed of an epoxy resin. delete

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