KR20080058601A - Coaxial cable connecter with the part for grounding - Google Patents

Coaxial cable connecter with the part for grounding Download PDF

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Publication number
KR20080058601A
KR20080058601A KR1020060132458A KR20060132458A KR20080058601A KR 20080058601 A KR20080058601 A KR 20080058601A KR 1020060132458 A KR1020060132458 A KR 1020060132458A KR 20060132458 A KR20060132458 A KR 20060132458A KR 20080058601 A KR20080058601 A KR 20080058601A
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South Korea
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coaxial cable
sleeve
connection
coupled
cable connector
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KR1020060132458A
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Korean (ko)
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KR101233308B1 (en
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황보근
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에스케이 텔레콤주식회사
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Priority to KR1020060132458A priority Critical patent/KR101233308B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0527—Connection to outer conductor by action of a resilient member, e.g. spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0512—Connections to an additional grounding conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

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  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

A coaxial cable connector added with a ground connection part is provided to connect a connector electrically with an external connector of a coaxial cable such as a feeder cable and connect a ground line to the connector to be connected to a ground copper rod, thereby reducing a time for grounding work and reducing a construction cost. In one end part of a sleeve(20), a locking protrusion(21) is formed. In the other end part, a cable insertion part(25) is formed. In a part of an outer circumference of the sleeve, a contact surface(29) for connection with a ground connection part(30) is formed. In a groove formed in an inner circumference of the locking protrusion, a unit for connection with an external conductor(43) of a coaxial cable is combined. A connection cap(10) is coupled with the locking protrusion of the sleeve and is for connection with an external connection terminal. One end part of the ground connection part is coupled with the contact surface of the sleeve.

Description

접지 연결부가 부가된 동축케이블 컨넥터 { Coaxial cable connecter with the part for grounding }Coaxial cable connector with the part for grounding}

도 1은 본 발명의 실시예에 따른 분해 사시도이다.1 is an exploded perspective view according to an embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 단면도이다.2 is a cross-sectional view according to an embodiment of the present invention.

도 3은 도 2의 A-B 선 단면도이다.3 is a cross-sectional view taken along the line A-B of FIG.

도 4는 본 발명의 실시예에 따른 접지 연결부 접촉면을 설명하기 위한 단면도이다.4 is a cross-sectional view for describing a ground connection contact surface according to an embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 텐션 스프링을 설명하기 위한 도면이다.5 is a view for explaining a tension spring according to an embodiment of the present invention.

도 6은 본 발명의 실시예에 따른 평면도이다.6 is a plan view according to an embodiment of the present invention.

< 도면의 주요부호에 대한 설명 ><Description of Major Symbols in Drawing>

10 : 연결캡 20 : 슬리브10: connecting cap 20: sleeve

30 : 접지연결부 40 : 동축케이블30: ground connection 40: coaxial cable

50 : 텐션스프링50: tension spring

본 발명은 동축케이블용 컨넥터에 관한 것이다. 좀 더 자세하게는 급전선을 외부접속단자에 접속하는 컨넥터에 있어서 동축케이블 형태를 갖는 급전선의 외부도체를 컨넥터 외부의 접지선과 연결하게 하는 접지연결부를 갖는 동축케이블 컨넥터에 관한 것이다.The present invention relates to a connector for a coaxial cable. More particularly, the present invention relates to a coaxial cable connector having a ground connection portion for connecting an outer conductor of a feed line having a coaxial cable type to a ground wire external to the connector in a connector for connecting the feed line to an external connection terminal.

종래에는 이동 전화 기지국 또는 중계기의 급전선을 접지하는 방법으로서 급전선 외피를 벗긴 후 급전선의 외부도체와 접지선을 연결하고 열 수축관을 사용하여 방수를 하여 접지선을 접지 동대까지 연결하도록 하는 것이었다.Conventionally, as a method of grounding a feeder line of a mobile phone base station or repeater, the outer conductor of the feeder line and the grounding line are connected after the feeder line is peeled off, and the grounding line is connected to the grounding band by waterproofing using a heat shrink tube.

그러나 이러한 시공은 접지 시공에 적지 않은 시간이 뒤따르고 접지 고장이 발생한 경우에 그 고장 수리에 불편함이 뒤따랐다.However, this construction was accompanied by a lot of time in the ground construction and inconvenient to repair the failure in the case of ground failure.

본 발명은 상기 문제점을 해결하기 위한 것으로서, 본 발명은 급전선 외부도체와 전기적으로 연결되는 외부접지 연결부를 갖는 컨넥터를 제공하여 접지 시공을 한결 간편하게 수행할 수 있도록 함에 목적이 있다.The present invention is to solve the above problems, an object of the present invention to provide a connector having an external ground connection that is electrically connected to the feeder outer conductor to make it easier to perform grounding construction.

상기 목적을 달성하기 위하여 본 발명에서는, 동축케이블의 전기적 접속을 위해 결합되는 동축케이블 컨넥터에 있어서,In the present invention to achieve the above object, in the coaxial cable connector coupled for electrical connection of the coaxial cable,

일단부에 걸림턱(21)이 형성되고, 다른 일단부는 동축케이블이 삽입되는 케이블 삽입부(25)가 형성되며, 외주면의 일부분에 접지 연결부와의 접속을 위한 접촉면(29)이 형성되고, 걸림턱 쪽 내주면에 형성된 홈(22)에 동축케이블의 외부 도체(43)와 접속하기 위한 수단(50)이 끼워지는 슬리브(20)와;A hooking jaw 21 is formed at one end, and a cable inserting portion 25 into which the coaxial cable is inserted is formed at the other end, and a contact surface 29 for connection with a ground connection is formed at a part of the outer circumferential surface. A sleeve 20 into which a groove 50 for connecting with the outer conductor 43 of the coaxial cable is fitted into the groove 22 formed on the inner peripheral surface of the jaw side;

상기 슬리브의 걸림턱(21)에 결합되어 외부 접속 단자와 연결하기 위한 연결캡(10)과;A connection cap 10 coupled to the catching jaw 21 of the sleeve to connect with an external connection terminal;

상기 슬리브의 접촉면(29)에 일단부가 결합되는 접지연결부(30)를 포함하는 것을 특징으로 하는 동축케이블 컨넥터가 제시된다.A coaxial cable connector is provided which comprises a ground connection portion 30 having one end coupled to a contact surface 29 of the sleeve.

이하에서는 첨부한 도면을 참조하면서 본 발명의 실시예에 대한 구성 및 작용을 상세하게 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the present invention.

도 1은 본 발명의 실시예에 따른 분해 사시도이다.1 is an exploded perspective view according to an embodiment of the present invention.

도 1에 도시된 바와 같이 그 구성은 외부 접속단자와 연결되는 연결캡(10), 동축케이블이 삽입되는 슬리브(20), 외부 접지선과 연결되는 접지 연결부(30) 및 슬리브에 삽입되는 동축케이블(40)로 이루어진다.As shown in FIG. 1, the configuration includes a connection cap 10 connected to an external connection terminal, a sleeve 20 into which a coaxial cable is inserted, a ground connection 30 connected to an external ground wire, and a coaxial cable inserted into a sleeve ( 40).

상기 동축케이블은 심선(41)을 중심으로 하여 절연층(42), 외부도체(43), 외피(44)의 순으로 환층을 형성하고 있다.The coaxial cable forms an annular layer in the order of the insulating layer 42, the outer conductor 43, and the outer shell 44 with the core wire 41 as the center.

도 2는 본 발명의 실시예에 따른 결합 측단면도이다.2 is a side cross-sectional view of the coupling according to an embodiment of the present invention.

상기 연결캡(10)은 외부 접속단자와 연결되는 부분으로서 육각 너트 형상이고, 내주면의 일단에는 외부 단자와 나사 결합하는 나사부(11)가, 다른 일단에는 걸림턱 홈(12)이 각각 형성되며, 이 홈(12)에 슬리브의 걸림턱(21)이 끼워져 연결캡(10)과 슬리브(20)가 서로 연결된 채로 상기 연결캡(10)이 회전할 수 있게 된다. 연결캡의 외면은 사용자의 편의에 따라 육각 너트 모양 외에도 널링 가공된 원통 모양 등의 다양한 형상으로 형성된다.The connection cap 10 has a hexagon nut shape as a part to be connected to the external connection terminal, one end of the inner peripheral surface is a screw portion 11 for screwing the outer terminal, the other end is formed with a locking step groove 12, The locking jaw 21 of the sleeve is fitted into the groove 12 so that the connection cap 10 can rotate while the connection cap 10 and the sleeve 20 are connected to each other. The outer surface of the connection cap is formed in various shapes such as a knurled cylindrical shape in addition to the hexagon nut shape according to the user's convenience.

상기 슬리브(20)는 동축케이블이 삽입되어 동축케이블의 외부 도체(43)를 외부 접지선과 전기적으로 연결되도록 하는 구성을 갖는다. The sleeve 20 has a configuration in which a coaxial cable is inserted to electrically connect the outer conductor 43 of the coaxial cable with an external ground line.

상기 슬리브(20)는 원통형상으로서 걸림턱(21), 몸통부(23), 케이블 삽입부(25)로 구성되고, 내부에 형성되어 있는 삽입공(26)으로 동축케이블이 삽입되고, 그 일단에는 내측을 향해 걸림턱(21)이 형성된다. 이 걸림턱(21)이 상기 연결캡(10)의 걸림턱 홈(12)에 끼워진다. The sleeve 20 has a cylindrical shape and includes a locking jaw 21, a body portion 23, and a cable insertion portion 25, and a coaxial cable is inserted into an insertion hole 26 formed therein. The locking jaw 21 is formed toward the inner side. The locking jaw 21 is fitted into the locking jaw groove 12 of the connection cap 10.

상기 슬리브의 걸림턱 쪽 부분에는 텐션스프링 홈(22)이 형성되어 이 홈(22)에 텐션스프링(50)이 끼워진다. 이때 링 모양의 텐션스프링의 직경이 상기 홈(22)의 직경보다 커 펼쳐지려는 복원력에 의해 상기 텐션스프링(50)이 상기 홈(22)의 원주면에 밀착된다. 스프링에 대하여는 도 5를 참조하면서 아래에서 상세히 설명하기로 한다. 이 텐션스프링의 탄성편(51)에 동축케이블의 외부 도체(43)가 접속된다. 이때 상기 각 탄성편의 최대 볼록 부분을 연결한 가상 원주의 직경(도 3의 d)이 삽입되는 동축케이블의 외부도체의 직경보다 작아 상기 탄성편의 탄성에 의해 상기 동축케이블의 외부도체(43)와 상기 슬리브(20)가 견고하게 접속된다.A tension spring groove 22 is formed at the engaging jaw side of the sleeve so that the tension spring 50 is fitted into the groove 22. At this time, the tension spring 50 is in close contact with the circumferential surface of the groove 22 by the restoring force to expand the diameter of the ring-shaped tension spring larger than the diameter of the groove 22. The spring will be described in detail below with reference to FIG. 5. The outer conductor 43 of the coaxial cable is connected to the elastic piece 51 of this tension spring. At this time, the diameter of the virtual circumference (d in FIG. 3) connecting the maximum convex portions of the elastic pieces is smaller than the diameter of the outer conductor of the coaxial cable into which the outer conductor 43 of the coaxial cable and the elastic cable are elastic. The sleeve 20 is firmly connected.

상기 슬리브의 몸통부(23)의 외면의 일부분은 상기 접지연결부를 접촉시킬 소정 길이와 폭을 갖는 평면으로 이루어진 접지연결부 접촉면(29)으로 이루어지고, 상기 접촉면의 길이 방향의 중심선 상의 소정 위치에 나사 홈이 두 개 형성되어 있다.A portion of the outer surface of the body portion 23 of the sleeve is composed of a ground connection contact surface 29 made of a plane having a predetermined length and width to contact the ground connection, and screwed at a predetermined position on the center line in the longitudinal direction of the contact surface. Two grooves are formed.

상기 접촉면(29)은 도 4의 (a)처럼 몸통부 외주면의 일부분을 깎아 형성된 침식형 또는 도 4의 (b)처럼 몸통부 외주면의 일부분에 외주면의 반지름보다 크게 형성된 돌출형이 될 수 있다. 접속나사(33,34)의 길이를 고려할 때 돌출형이 더 바람직하다.The contact surface 29 may be an erosion type formed by shaving a portion of the outer peripheral surface of the body as shown in FIG. 4A or a protrusion formed larger than the radius of the outer peripheral surface on a portion of the outer peripheral surface of the body as shown in FIG. In view of the length of the connecting screws 33 and 34, the protruding type is more preferable.

상기 슬리브(20)의 케이블 삽입부(25)는 동축 케이블이 삽입되는 곳으로서 경우에 따라서는 외주면과 내주면 사이의 두께를 얇게 형성하여 동축케이블과 결합시 상기 삽입부를 압착하여 동축케이블과 결합할 수 있도록 구성할 수 있다.The cable inserting portion 25 of the sleeve 20 is a place where the coaxial cable is inserted, and in some cases, the thickness between the outer circumferential surface and the inner circumferential surface is thin so that the inserting portion can be compressed and combined with the coaxial cable. Can be configured to

상기 접지연결부(30)는 얇은 평판 형상으로 형성되어 상기 몸통부의 접지연결부 접촉면(29)과 접속나사(33,34)에 의해 접속되는 슬리브 접속단(31)과 외부 접지전선이 끼워지는 반원기둥 모양의 접지 전선 접속단(32)으로 구성된다.The ground connection part 30 is formed in a thin plate shape and has a semi-cylindrical shape into which a sleeve connection end 31 and an external ground wire are fitted, which are connected by a ground connection part contact surface 29 and connection screws 33 and 34 of the body part. It is composed of a ground wire connecting end 32.

도 5는 본 발명의 실시예에 따른 텐션 스프링을 설명하기 위한 도면이다.5 is a view for explaining a tension spring according to an embodiment of the present invention.

도 5(a)는 링 형상의 텐션스프링을 나타낸다. (a)와 같이 상기 텐션스프링은 링 형상으로서 복원력에 의해 오므라들거나 펼쳐질 수 있도록 양단부(54)를 가지며, 이러한 텐션스프링은 양단부(54)가 형성되어 있어 링 형상으로 상기 텐션스프링 홈(22)에 끼워질 때 지름의 크기를 선택적으로 조절할 수 있다. 내측벽에 돌출되게 형성된 각 탄성편(51)은 도 5(b)의 A-B쪽에서 본 단면도인 도 5의(c)와 같이 내측벽으로 오목한 형태로 만곡되게 돌출되어 내측벽 쪽으로의 압력에 대하여 반대 방향으로 탄성력을 가지며, 그 최대의 오목한 부분이 결합되는 동축케이블의 외부 도체와 밀착하게 된다.5 (a) shows a ring-shaped tension spring. As shown in (a), the tension spring has both ends 54 so as to be retracted or unfolded by a restoring force as a ring shape, and such tension springs have both ends 54 formed therein so as to have a ring shape in the tension spring groove 22. You can optionally adjust the size of the diameter when it is fitted. Each of the elastic pieces 51 formed to protrude on the inner wall is projected in a concave shape to the inner wall as shown in FIG. 5 (c) which is a cross-sectional view seen from the AB side of FIG. 5 (b) to oppose the pressure toward the inner wall. The elastic force in the direction, the largest concave portion is in close contact with the outer conductor of the coaxial cable.

도 5의 (b)는 텐션스프링(50)이 펼쳐진 상태를 보인 전개도 도면이다. 이와 같이 펼쳐진 텐션스프링(50)은 박판의 형상을 가지며, 몸체(53)의 폭방향으로 형성된 관통공(52)이 탄성편(51) 사이에 병렬로 배치되어 있다.5 (b) is an exploded view showing the state in which the tension spring 50 is unfolded. The unfolded tension spring 50 has a thin plate shape, and through holes 52 formed in the width direction of the body 53 are disposed in parallel between the elastic pieces 51.

도 6은 본 발명의 실시예에 따른 동축케이블 컨넥터의 평면도이다.6 is a plan view of a coaxial cable connector according to an embodiment of the present invention.

상기 접지연결부(30)의 슬리브 접촉단(31)과 상기 슬리브의 접지연결 접촉 면(29)이 연결 나사(33,34)에 의하여 결합된 형태이다.The sleeve contact end 31 of the ground connection part 30 and the ground connection contact surface 29 of the sleeve are coupled to each other by connecting screws 33 and 34.

상기한 본 발명의 실시예에 따른 각 구성요소는 금속성의 전도성 소재로서 구성된다.Each component according to the embodiment of the present invention described above is configured as a metallic conductive material.

본 발명에 의하면, 급전선 등의 동축케이블의 외부 도체와 컨넥터는 전기적으로 연결되어 있으므로 컨넥터에 접지선을 연결하여 접지 동대에 연결하게 함으로써 접지 시공에 필요한 시간을 단축할 뿐만 아니라 공사비용을 절감할 수 있다. 또한 접지 불량이 발생한 경우에도 간단하게 수리할 수 있는 이점이 있다.According to the present invention, since the outer conductor and the connector of the coaxial cable such as the feeder are electrically connected, the ground wire is connected to the connector to be connected to the grounding cord, thereby reducing the time required for grounding and reducing the construction cost. . In addition, there is an advantage that can be easily repaired even when a ground fault occurs.

Claims (9)

동축케이블의 전기적 접속을 위해 결합되는 동축케이블 컨넥터에 있어서,In the coaxial cable connector coupled for electrical connection of the coaxial cable, 일단부에 걸림턱(21)이 형성되고, 다른 일단부는 동축케이블이 삽입되는 케이블 삽입부(25)가 형성되며, 외주면의 일부분에 접지 연결부와의 접속을 위한 접촉면(29)이 형성되고, 걸림턱 쪽 내주면에 형성된 홈(22)에 동축케이블의 외부 도체(43)와 접속하기 위한 수단(50)이 결속되는 슬리브(20)와;A hooking jaw 21 is formed at one end, and a cable inserting portion 25 into which the coaxial cable is inserted is formed at the other end, and a contact surface 29 for connection with a ground connection is formed at a part of the outer circumferential surface. A sleeve 20 to which a means 50 for connecting the outer conductor 43 of the coaxial cable is connected to the groove 22 formed on the inner peripheral surface of the jaw side; 상기 슬리브의 걸림턱(21)에 결합되어 외부 접속 단자와 연결하기 위한 연결캡(10)과;A connection cap 10 coupled to the catching jaw 21 of the sleeve to connect with an external connection terminal; 상기 슬리브의 접촉면(29)에 일단부가 결합되는 접지연결부(30)를 포함하는 것을 특징으로 하는 동축케이블 컨넥터.And a ground connection part (30) having one end coupled to the contact surface (29) of the sleeve. 청구항 1에 있어서,The method according to claim 1, 상기 외부 도체와 접속하기 위한 수단(50)은 두 개의 끝단을 갖는 링 모양의 텐션스프링인 것을 특징으로 하는 동축케이블 컨넥터.And means (50) for connecting with said outer conductor is a ring-shaped tension spring having two ends. 청구항 2에 있어서,The method according to claim 2, 상기 텐션스프링은 슬리브의 내측으로 볼록하게 돌출된 복수의 탄성편(51)을 구비하는 것을 특징으로 하는 동축케이블 컨넥터.The tension spring is a coaxial cable connector, characterized in that it comprises a plurality of elastic pieces (51) protruding convexly into the sleeve. 청구항 3에 있어서,The method according to claim 3, 상기 복수의 탄성편(51)의 최고 볼록부분을 연결한 가상 원주의 직경(d)이 결합되는 상기 동축케이블의 외부도체의 외주면 직경보다 작은 것을 특징으로 하는 동축케이블 컨넥터.Coaxial cable connector, characterized in that the diameter (d) of the virtual circumference connecting the most convex portions of the plurality of elastic pieces (51) is smaller than the outer peripheral surface diameter of the outer conductor of the coaxial cable coupled. 청구항 1 내지 4중 어느 하나에 있어서,The method according to any one of claims 1 to 4, 상기 접촉면(29)은 평면 형태이고, 그 형상이 침식형 또는 돌출형인 것을 특징으로 하는 동축케이블 컨넥터.The contact surface 29 is a planar shape, the shape of the coaxial cable connector characterized in that the eroded or protruding shape. 청구항 1 내지 4중 어느 하나에 있어서,The method according to any one of claims 1 to 4, 상기 접지연결부(30)는 일단부가 평판 형태로 상기 슬리브의 접촉면(29)에 결합되고, 타단부가 반원 막대 모양으로 외부 전선과 연결되는 것을 특징으로 하는 동축케이블 컨넥터.The ground connection portion 30 is coaxial cable connector, characterized in that one end is coupled to the contact surface 29 of the sleeve in the form of a flat plate, the other end is connected to the external wire in the shape of a semi-circular rod. 청구항 1 내지 4중 어느 하나에 있어서,The method according to any one of claims 1 to 4, 상기 슬리브의 접촉면(29)과 상기 접지연결부(30)는 나사에 의해 결합되는 것을 특징으로 하는 동축케이블 컨넥터.Coaxial cable connector, characterized in that the contact surface 29 and the ground connection portion 30 of the sleeve are coupled by a screw. 청구항 1 내지 4중 어느 하나에 있어서,The method according to any one of claims 1 to 4, 상기 연결캡(10)의 내주면 일단에는 암나사가 형성되어 있는 것을 특징으로 하는 동축케이블 컨넥터.Coaxial cable connector, characterized in that the female thread is formed on one end of the inner peripheral surface of the connection cap (10). 청구항 1 내지 4중 어느 하나에 있어서,The method according to any one of claims 1 to 4, 상기 케이블 삽입부(25)는 내주면과 외주면의 두께가 얇아 압착에 의하여 동축케이블과 결합되는 것을 특징으로 하는 동축케이블 컨넥터.The cable insertion portion 25 is a coaxial cable connector, characterized in that the thickness of the inner circumferential surface and the outer circumferential surface is coupled with the coaxial cable by compression.
KR1020060132458A 2006-12-22 2006-12-22 Coaxial cable connecter with the part for grounding KR101233308B1 (en)

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KR102172557B1 (en) * 2020-06-03 2020-11-02 (주)유원건축사사무소 structure of the coaxial cable connector for Building

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KR102084016B1 (en) 2018-12-11 2020-03-03 염채화 Connector for coaxial cable

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KR20110008445A (en) * 2009-07-20 2011-01-27 백일선 Connector having a portion for grounding

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102172557B1 (en) * 2020-06-03 2020-11-02 (주)유원건축사사무소 structure of the coaxial cable connector for Building

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