KR102253613B1 - RF cable earthing apparatus and making method of the same - Google Patents

Abstract

The present invention is a grounding device for an RF cable and a method of manufacturing the same. In the present invention, in coupling the barrel part 19 of the external terminal 14 with the cable 30, the sleeve 40 surrounding the ground structure 36 of the cable 30 and the external insulation of the cable 30 The outer diameter of the layer 38 is set equal. In addition, the barrel part 19 has a close contact compression piece 20 surrounding the sleeve 40 and a through-engagement piece 24 penetrating the outer insulating layer 38 and contacting the ground structure 36 at the same time. It is equipped. When the sleeve 40 surrounds the ground structure 36 of the cable 30 and the barrel part 19 surrounds the outer insulating layer 38 of the sleeve 40 and the cable 30 The strength of the inner insulating layer 34 of the cable 30 does not change.

Description

RF cable earthing apparatus and making method of the same

The present invention relates to a grounding device for an RF cable and a manufacturing method thereof, and more particularly, to a grounding device for an RF cable that performs grounding in a connection between a cable and a terminal, and a manufacturing method thereof.

RF cables are used for signal transmission, and are made by surrounding the outer surface of a core wire with an inner insulating layer, a ground structure surrounding the inner insulating layer, and surrounding the ground structure with an outer insulating layer. In such an RF cable, the specifications of the core wire and the inner insulating layer have a great influence on the signal transmission characteristics.

In order to connect the RF cable to the terminal, a crimping process has to be performed. In this crimping process, when the characteristics of the core wire and the inner insulating layer are different, the impedance value changes and the signal transmission characteristics deteriorate.

Therefore, it is very important not to change the characteristics of the core wire and the inner insulating layer in the coupling between the RF cable and the barrel part of the terminal.

In addition, conventionally, in order not to affect the signal transmission characteristics of the RF cable, the crimp bonding area between the cable and the terminal has not been widened. Due to such structural characteristics, there is a problem that the grounding performance is deteriorated and the coupling force between the cable and the terminal is weakened.

Japanese Patent Publication No. 2013-206620

An object of the present invention is to solve the conventional problems as described above, and to minimize the change in characteristics of the cable when the cable and the terminal are crimped together.

Another object of the present invention is to perform ground bonding in a wider area in the combination of cables and terminals.

Another object of the present invention is to maximize the coupling force between a cable and a terminal.

According to the features of the present invention for achieving the above object, the present invention combines a terminal consisting of an inner terminal and an outer terminal, and a cable having a core wire inside and a grounding structure between the inner and outer insulating layers. In the grounding device for an RF cable, an external insulating layer is removed from the cable and installed to surround the grounding structure at a location where the grounding structure is exposed, and a sleeve made of a conductive material and provided on the barrel of the external terminal And a through-coupling piece provided on the barrel of the outer terminal and enclosing the outer insulating layer of the cable and penetrating the outer insulating layer and contacting the ground structure of the cable. The through-engagement piece may be formed such that the width of the tip protrusion formed at the tip becomes narrower toward the tip.

The diameter when the sleeve is installed to surround the ground structure and the diameter of the outer insulating layer of the cable are the same.

In the close contact compression piece, those at both ends of the barrel portion are alternately disposed to surround the outer surface of the sleeve to form a cylindrical shape.

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The through-engagement piece and the close contact compression piece are formed so that both sides of the barrel part protrude toward each other in the state in which the barrel portion is not compressed, and the close contact bonding piece protrudes in a direction orthogonal to the through-engagement piece. do.

According to another feature of the present invention, the present invention manufactures a grounding device for an RF cable that combines a terminal composed of an inner terminal and an outer terminal and a cable having a core wire inside and a grounding structure between the inner and outer insulating layers. In the method, the cable processing step of exposing the core wire and the ground structure of the cable by a predetermined length, the inner terminal coupling step of coupling the inner terminal to the core wire, and the ground structure in a state in which the inner terminal and the core wire are combined. A sleeve installation process surrounding the sleeve, and a barrel part crimping process in which the inner terminal is placed in an inner housing installed inside the outer terminal and the barrel part of the outer terminal is crimped to surround the sleeve and the outer insulating layer of the cable. It may include, and in the sleeve installation process surrounding the ground structure with the sleeve, the internal insulating layer may be crimped with a force such that no change in size of the inner insulating layer occurs, and in the barrel part crimping process of compressing the barrel part, the The inner insulating layer can be compressed with a force that does not change the dimensions of the barrel, and in the barrel pressing process, the sleeve is surrounded by a close compression piece of the barrel, and the outer insulating layer is compressed with the through-fitting piece of the barrel. While being enclosed and compressed, the tip protrusion of the through coupling piece may penetrate the outer insulating layer to contact the ground structure.

When the sleeve is installed to surround the ground structure, the outer diameter of the sleeve is the same as the outer diameter of the outer insulating layer of the cable.

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The sleeve and barrel are made into a cylindrical shape after pressing.

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In the grounding device for an RF cable and a method of manufacturing the same according to the present invention, the following effects can be obtained.

In the present invention, the outer insulation layer of the cable is removed and the sleeve is installed at the exposed ground structure, so that the outer diameter of the part where the sleeve is installed and the outer diameter of the adjacent outer insulating layer are the same, and the barrel of the external terminal is crimped. do. Accordingly, since the outer diameter of the area of the cable to which the barrel portion is crimped is kept constant, there is an effect that the coupling force between the terminal and the cable is maintained above a certain level.

In the present invention, since the sleeve is made of a conductive material and is in close contact with the grounding structure and at the same time in close contact with the barrel portion of the external terminal, a wide area for grounding between the terminal and the cable is secured. In addition, since the through-coupling piece of the barrel part penetrates the outer insulating layer of the cable and contacts the grounding structure, the area for grounding is maximized, thereby maximizing the grounding performance.

In addition, in the present invention, since the through coupling piece in the barrel part of the outer terminal is installed through the outer insulating layer of the cable, the coupling force between the cable and the outer terminal becomes very large, so that the effect of a firm connection between the cable and the outer terminal is achieved. Have.

1 is an exploded perspective view showing a preferred embodiment of a grounding device for a cable according to the present invention.
2 is a perspective view showing a terminal and a cable to which an embodiment of the present invention is applied.
Figure 3 is an exploded perspective view showing the disassembled parts constituting the embodiment of the present invention.
Figure 4 is a cross-sectional perspective view showing the internal configuration of the embodiment of the present invention.
5 is a cross-sectional view taken along line 5-5 of FIG. 2;
6 is an explanatory diagram showing a procedure of a manufacturing method according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

In the drawings, a configuration for grounding between the terminal 10 and the cable 30 is shown. First, the terminal 10 is composed of an inner terminal 12 for signal transmission and an external terminal 14 for grounding. Insulation between the inner terminal 12 and the outer terminal 14 is performed by an inner housing 16 made of an insulating material. The inner terminal 12 is installed through the inner housing 16, and the outer terminal 14 surrounds the inner housing 16.

At the front end of the external terminal 14, there is a connection part 18 for contact with the other terminal, and at the rear end there is a barrel part 19 for coupling with the ground structure 36 of the cable 30. This is the inner terminal 12 has a similar configuration. That is, the inner terminal 12 has a connection part 18' at the front end, and a barrel part 19' at the rear end, so that it is combined with the core wire 32 of the cable 30.

The barrel part 19 of the external terminal 14 will be described in more detail. The barrel part 19 has different configurations of a front end and a rear end. At the front end of the barrel part 19, there is a close contact compression piece 20. The close contact compression piece 20 is compressed by mainly surrounding the area of the cable 30 to which the ground structure 36 is exposed. Of course, a portion of the tip of the outer insulating layer 38 covering the ground structure 36 may be covered. In this embodiment, as can be seen in FIG. 4, the close contact compression piece 20 surrounds the sleeve 40 surrounding the exposed ground structure 36 including a part of the front end of the outer insulating layer 38. Wrapped and squeezed.

The close compression pieces 20 are formed alternately with each other at both ends of the barrel part 19. In FIG. 1, there are two close compression pieces 29 on one side of the barrel part 19 and one close compression piece 29 on the other side, so that the close compression piece 29 on the other side is a close contact compression piece 29 on one side. Entering the position between the sleeve 40 and the outer insulating layer 38 is wrapped around and compressed. Most ideally, the pressing pieces 20 at both ends cooperate with each other to form a cylindrical shape.

The close contact compression piece 20 may have a shape that complements each other at both ends, so that the tip of the barrel part 19 as a whole may be made into a cylindrical shape. In the illustrated embodiment, one side has a trapezoid shape and the other side has a triangular shape, but both sides may have a square shape or a wave shape.

There are penetrating coupling pieces 22 on both sides of the rear end of the barrel part 19. The through coupling piece 22 penetrates the outer insulating layer 38 of the cable 30 to be described below and contacts the ground structure 36. The through coupling piece 22 has a pointed tip protrusion 24 at its tip. The tip protrusion 24 is configured to have a narrower width toward the tip so that the outer insulating layer 38 can be easily penetrated. The through-engagement pieces 22 are such that the ends of the protrusions 24 face each other on both sides. Compared to the close contact compression piece 20 protruding upwardly with reference to FIG. 1, the through-engaging pieces 22 extend so that the tip protrusion 24 at the tip faces. Therefore, there is a difference of 90 degrees between the extension direction of the close compression piece 20 and the through-engagement piece 22.

The through coupling pieces 22 face each other and are pressed against the cable 30 to pass through the outer insulating layer 38 of the cable 30 to contact the ground structure 36. At this time, the through coupling pieces 22 on both sides pass through the outer insulating layer 38 in parallel with each other and contact the ground structure 36. This is well illustrated in FIG. 5.

The cable 30 is for high voltage, more precisely, an RF cable. There is a core wire 32 at the center of the innermost side. The core wire 32 is for signal transmission and is made of a conductive material. There is an inner insulating layer 34 surrounding the core wire 32. The inner insulating layer 34 is for insulating the core wire 32 from the outside.

There is a ground structure 36 surrounding the inner insulating layer 34. The ground structure 36 is in the form of a mesh made of a conductive material. There is an external insulating layer 38 surrounding the ground structure 36. The outer insulating layer 38 is also made of an insulating material. The outer insulating layer 38, like the inner insulating layer 34, is for insulating from the outside.

Meanwhile, a cylindrical sleeve 40 is positioned in an area where the ground structure 36 is exposed by removing the outer insulating layer 38 from the tip of the cable 30. That is, a cylindrical sleeve 40 surrounds the exposed ground structure 36. The sleeve 40 serves to protect the core wire 32 and the inner insulating layer 34 of the cable 30. The sleeve 40 is made of a conductive material and also serves to increase an area for grounding. The sleeve 40 has an inner surface in contact with the ground structure 36 and an outer surface in contact with the barrel portion 19 of the outer terminal 14 to electrically connect the outer terminal 14 and the ground structure 36 to each other. Connect.

For reference, the sleeve 40 allows the barrel part 19 of the external terminal 14 to be crimped while the exposed ground structure 36 is wrapped, so that the core wire 32 is crimped when the barrel part 19 is crimped. Make sure that no partial impedance change occurs.

Hereinafter, it will be described in detail that the grounding device for an RF cable according to the present invention having the above-described configuration is made.

In the present invention, connecting the terminal 10 and the cable 30 proceeds in the order shown in FIG. 6. First, the inner insulating layer 34, the outer insulating layer 38, and the ground structure 36 are removed from the ends of the cable 30 by different lengths. Through this process, as shown in (a) of FIG. 6, the core wire 32 is exposed at the leading end of a predetermined length, and then the inner insulating layer 34 is exposed by a predetermined length. In addition, the ground structure 36 surrounding the inner insulating layer 34 is exposed by a predetermined length. This process can be performed in a single process using an automated device.

Next, the barrel part 19 ′ of the inner terminal 12 is coupled to the core wire 32. This state is shown in Fig. 6B. A portion of the core wire 32 exposed to the outside is inserted into the barrel part 19' of the inner terminal 12, and the end of the inner insulating layer 34 is in contact with the end of the barrel part 19'. Becomes.

The sleeve 40 is installed on the cable 30 while the inner terminal 12 and the core wire 32 are connected. The sleeve 40 surrounds the ground structure 36 exposed to the outside. The sleeve 40 is made of a conductive material and is electrically connected to the ground structure 35.

The sleeve 40 is crimped to surround the ground structure 36 in a state in which the cross section is in a'U' shape. When the sleeve 40 is compressed, it is compressed with a force such that no change in diameter of the inner insulating layer 34 occurs. Since the sleeve 40 is installed to surround the ground structure 36, the diameter of the portion where the sleeve 40 is installed and the diameter of the cable 30 at the portion where the outer insulating layer 38 is located are Will be the same. This state is shown in Fig. 6C.

Next, as shown in (d) of FIG. 6, the inner terminal 12 is inserted into the inner housing 16 installed in the outer terminal 14 while the inner terminal 12 and the core wire 32 are connected. . In the state where the inner terminal 12 is inserted into the inner housing 16, the rear end of the sleeve 40 is located at a position corresponding to the close contact compression piece 20 of the barrel portion 19 of the outer terminal 14. To be there. Accordingly, the through coupling piece 22 is positioned at a position corresponding to the outer insulating layer 38.

Next, a process of compressing the barrel part 19 of the external terminal 14 is performed. Through a pressing process for the barrel part 19 of the external terminal 14, the close compression piece 20 is compressed by wrapping around the outer surface of the sleeve 40, and the through-engagement piece 22 is a cable 30 ) Through the outer insulating layer 38, as shown in FIG. 5, the tip protrusion 24 is in contact with the ground structure 36.

Even in the process of compressing the barrel part 19, the diameter of the inner insulating layer 34 is not changed. In this process, since the diameter of the portion of the cable 30 wrapped by the barrel portion 19 and the diameter of the portion of the sleeve 40 are the same, the pressing operation for the barrel portion 19 can be performed relatively simply. .

Since the barrel part 19 is crimped, that is, the sleeve 40 and the outer insulating layer 38 of the cable 30 have the same diameter, the overall constant is uniform by the crimping of the barrel 19. You will have a bonding force. In particular, since the through coupling piece 22 penetrates and is coupled to the outer insulating layer 38, the coupling force between the terminal 10 and the cable 30 is very strong.

When the terminal 10 and the cable 30 are connected in this way, the core wire 32 and the inner terminal 12 are responsible for signal connection, and the external terminal 14 is the ground structure 36 of the cable 30. It is connected to and is in charge of grounding so that noise does not occur in signal transmission through the core wire 32 and the inner terminal 12.

The sleeve 40 surrounds the ground structure 36 and is compressed, and the through coupling piece 22 of the external terminal 14 is in contact with the ground structure 36, so that the connection area for grounding is relatively large. The grounding performance can be maximized.

In the above, even if all the constituent elements constituting the embodiments of the present invention have been described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: Terminal 12: Inner terminal
14: external terminal 16: internal housing
17: fixing hooks 18,18': connection
19,19': barrel part 20: close compression piece
22: through coupling piece 24: tip protrusion
30: cable 32: core wire
34: inner insulating layer 36: ground structure
38: outer insulating layer 40: sleeve

Claims (11)

In the grounding device for RF cables that combines a terminal composed of an inner terminal and an outer terminal and a cable having an inner core wire and a grounding structure between the inner and outer insulating layers,
A sleeve made of a conductive material and installed to surround the ground structure at a location where the ground structure is exposed by removing the outer insulating layer from the cable;
A close contact compression piece provided in the barrel portion of the external terminal and surrounding the sleeve,
It is provided in the barrel portion of the outer terminal and surrounds the outer insulating layer of the cable and includes a through coupling piece that penetrates the outer insulating layer and comes into contact with the ground structure of the cable,
The through-coupled piece is a grounding device for an RF cable in which the width of the tip protrusion formed at the tip becomes narrower toward the tip.
The grounding device for an RF cable according to claim 1, wherein a diameter in a state in which the sleeve is installed to surround the ground structure and a diameter of an outer insulating layer of the cable are the same.
The grounding device for an RF cable according to claim 2, wherein the close contact crimping pieces are arranged alternately at both ends of the barrel portion to surround the outer surface of the sleeve to form a cylindrical shape.
delete The method according to any one of claims 1 to 3, wherein the through-engagement piece and the close-contact compression piece are formed so that both sides of the barrel part protrude toward each other in a state in which the barrel part is not compressed. The crimp piece is a grounding device for an RF cable protruding in a direction orthogonal to the through-coupled piece.
In the method of manufacturing a grounding device for an RF cable that combines a terminal consisting of an inner terminal and an outer terminal and a cable having a core wire inside and a grounding structure between the inner and outer insulating layers,
A cable processing process of exposing the core wire and ground structure of the cable by a predetermined length,
An inner terminal coupling process of coupling an inner terminal to the core wire,
A sleeve installation process surrounding the ground structure with a sleeve in a state in which the inner terminal and the core wire are combined,
And a barrel part crimping step of placing the inner terminal in an inner housing installed inside the outer terminal and compressing the barrel part of the outer terminal so as to surround the outer insulating layer of the sleeve and the cable,
In the sleeve installation process surrounding the ground structure with the sleeve, the internal insulating layer is compressed with a force such that no change in size occurs,
In the barrel part pressing process of compressing the barrel part, the internal insulating layer is compressed with a force such that no change in size occurs,
In the barrel part crimping process, the sleeve is compressed by enclosing and compressing the sleeve by the close compression piece of the barrel part, and the outer insulating layer is surrounded by the through-fitting piece of the barrel part and compressed, while the tip protrusion of the through-engaging piece penetrates the outer insulating layer to form a grounding structure. Method of manufacturing a grounding device for an RF cable that contacts with.
The method of claim 6, wherein the outer diameter of the sleeve is the same as the outer diameter of the outer insulating layer of the cable while the sleeve is installed to surround the earthing structure.
delete delete The method of claim 6, wherein the sleeve and the barrel part are made into a cylindrical shape after compression.
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