JP5055038B2 - Coaxial cable connector and assembly method thereof - Google Patents

Description

  The present invention relates to a coaxial cable connector used in an electronic device such as a mobile phone and an assembling method thereof.

Conventionally, coaxial cables have been widely used for electronic devices such as mobile phones (see Patent Documents 1 to 3).
FIG. 6 shows an example of a coaxial cable and a connector assembled at the tip thereof.
The connector 30 is assembled at the distal end portion of the coaxial cable 21 and includes a connector main body 31 and a metal cover shell 32 disposed to face the connector main body 31.
The connector main body 31 includes a connection portion 35 to which the central conductor 22 of the coaxial cable 21 is connected, and a metal connector shell 34. The connector shell 34 is connected to the cover shell 32 at a connection position (not shown).

In the coaxial cable 21, an insulating layer 23 is provided on the outer periphery of the center conductor 22, an outer conductor 24 (shield wire) is provided on the outer periphery thereof, and a jacket 25 is provided on the outer periphery thereof.
At the tip of the coaxial cable 21, the outer sheath 25 is removed to expose the outer conductor 24, and the center conductor 22 is exposed at the tip.
A plurality of coaxial cables 21 are arranged in parallel, and outer conductors 24 of the plurality of coaxial cables 21 are collectively sandwiched between ground bars 8 and 8 made of a metal plate and connected by soldering or pressure welding. Reference symbol P3 is a connection point between the outer conductor 24 and the ground bar 8.
The center conductor 22 is connected to the connection portion 35 of the connector 30 by soldering or pressure contact. Reference symbol P4 is a connection point between the central conductor 22 and the connection portion 35.

The ground bar 8 is disposed between the connector main body 31 and the cover shell 32, and is connected to the cover shell 32 by soldering or pressure contact. For this reason, the external conductor 24 is connected to the connector shell 34 via the ground bar 8 and the cover shell 32. Reference numeral P <b> 5 is a connection point between the ground bar 8 and the cover shell 32.
When the connector 30 is connected to a receiving connector (for example, a receptacle) (not shown), the connector shell 34 directly contacts the connecting portion of the receiving connector and is thereby connected to the ground. Hereinafter, the connection path from the external conductor 24 through the connector shell 34 to the connection portion of the receiving connector may be referred to as a ground line.

Next, an example of a method for assembling the connector 30 at the tip of the coaxial cable 21 will be described.
The outer sheath 25 at the tip of the coaxial cables 21 arranged in parallel is removed to expose the outer conductor 24 and lead out the center conductor 22.
The ground bars 8 and 8 and the external conductor 24 are soldered in a state where the external conductor 24 is sandwiched between the two ground bars 8 and 8 (connection point P3 in FIG. 6). The soldering between the ground bar 8 and the external conductor 24 is performed prior to the assembly of the connector 30.

As shown in FIG. 7, the coaxial cable 21 to which the ground bar 8 is fixed is placed on the connector main body 31, and the center conductor 22 is connected to the connection portion 35 by soldering (connection point P4 in FIG. 6).
Further, the cover shell 32 is disposed on the coaxial cable 21, and the cover shell 32 is connected to the ground bar 8 by soldering (connection point P5 in FIG. 6).

In the connector described in Patent Document 2, a ground plate having a concave groove into which an outer conductor is fitted is used in the ground line. The outer conductor and the ground plate are connected by fitting the outer conductor into the concave groove and press-contacting them. In this structure, work is easy because pressure welding is used instead of soldering.
JP 2001-307822 A JP 2004-179150 A JP 2006-147473 A

However, the connector 30 has a problem that the number of work steps is large and it takes time to manufacture.
Further, when pressure welding is adopted as the connection method of the external conductor in the ground line, there is an advantage that the work becomes easy, but the connection reliability may be insufficient.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coaxial cable connector and an assembling method thereof that can reduce the number of work steps and can improve connection reliability in a ground line.

The present invention is a method of assembling a connector at the tip of a coaxial cable in which an insulating layer is provided on the outer circumference of a central conductor, an outer conductor is provided on the outer circumference, and a jacket is provided on the outer circumference. Comprises a connecting portion to which the central conductor is connected, an insulating holding portion for holding the connecting portion, and a metal connector shell that is directly grounded to the receiving-side connector. Soldering the ground bar to the external conductor and the connector shell in a state where the metal ground bar placed in contact with the external conductor is in contact with the connector shell; and connecting the center conductor to the connection shell And a method of assembling a connector for a coaxial cable including a step of soldering to a portion .
In the present invention, the soldering can be performed in a state where the ground bar is overlaid on one surface of the connector shell .
In the present invention, the outer conductor can be sandwiched between two ground bars, and the soldering can be performed in a state where one of them is in contact with the connector shell .
In the present invention, a metal cover shell can be provided so as to face the connector shell across the coaxial cable .

The present invention is a connector assembled at the tip of a coaxial cable, in which an insulating layer is provided on the outer periphery of a center conductor, an outer conductor is provided on the outer periphery, and an outer cover is provided on the outer periphery. A metal that includes a connecting portion to be connected, an insulating holding portion that holds the connecting portion, and a metal connector shell that is directly grounded to the receiving connector, and that is in contact with the outer conductor of the coaxial cable A ground bar made of solder is integrally soldered to the outer conductor and the connector shell in contact with the inner surface of the connector shell, and the connection portion is the same as the connector shell side when viewed from the coaxial cable. A coaxial cable connector is provided which is connected to the central conductor from the side, and the central conductor is soldered to the connecting portion .
The coaxial cable connector of the present invention may be configured such that a metal cover shell is provided so as to face the connector shell with the coaxial cable interposed therebetween .

According to the present invention, the ground bar is soldered to the external conductor and the connector shell and the center conductor is soldered to the connecting portion in a state where the ground bar is in contact with the outer shell of the coaxial cable. Therefore, these soldering operations can be performed in a series of operations.
Therefore, compared to the conventional method of fixing the ground bar to the coaxial cable prior to incorporation into the connector, the number of work steps can be reduced and the efficiency of assembly work can be improved.

Since the outer conductor, the ground bar, and the connector shell are connected by soldering, the electrical resistance between the outer conductor and the connector shell can be lowered. For this reason, it is excellent in connection reliability of the ground line as compared with the method in which the external conductor is connected to the connector shell via the cover shell.
Further, since the external conductor, the ground bar, and the connector shell are directly connected by soldering, it is not necessary to connect the cover shell and the ground bar. For this reason, the number of work processes can be reduced, and the efficiency of assembly work can be improved.

1 to 4 show an example of a coaxial cable connector according to the present invention. FIG. 1 is a cross-sectional view showing a coaxial cable connector 10 (hereinafter simply referred to as a connector 10). FIG. 2 is a plan view of the connector 10 as viewed from the cover shell 2 side. FIG. 3 is a front view showing the connector 10. FIG. 4 is a plan view of the connector 10 as viewed from the connector shell 4 side.
In the following description, the front end direction of the coaxial cable 21 may be referred to as the front, and the opposite direction may be referred to as the rear.

As shown in FIG. 1, the connector 10 is assembled at the distal end portion of the coaxial cable 21, and includes a connector main body 1 and a cover shell 2 disposed to face the connector main body 1.
The connector main body 1 includes a connecting portion 5 to which the central conductor 22 of the coaxial cable 21 is connected, a holding portion 3 that holds the connecting portion 5, and a connector shell provided on the outer surface side (lower surface in FIG. 1) of the holding portion 3. 4 is provided.
The holding part 3 is made of an insulating material such as resin, and includes a main body part 6 and a protruding part 7 that protrudes forward from the main body part 6. The protrusion 7 is inserted into a fitting hole (not shown) of the receiving connector when the connector 10 is connected to a receiving connector (for example, a receptacle) (not shown).

The connector shell 4 is made of a metal plate, is attached to the outer surface 6 a (lower surface in FIG. 1) of the main body 6, and is formed to extend rearward from the rear end of the main body 6. This rearward extension portion is referred to as an extension portion 4a.
When the connector 10 is connected to a receiving connector (not shown), the connector shell 4 is directly grounded to the connection portion of the receiving connector. That is, it directly contacts the connection part of the receiving connector and is thereby connected to the ground. Hereinafter, the connection path from the external conductor 24 through the connector shell 4 to the connection portion of the receiving connector may be referred to as a ground line.

The connecting portion 5 is made of a metal plate and is formed from the inner surface side (upper surface in FIG. 1) of the main body portion 6 to the protruding portion 7.
The cover shell 2 is made of a metal plate and is provided to face the connector shell 4 with the coaxial cable 21 interposed therebetween. The cover shell 2 can protect the soldered portion. The cover shell 2 may be connected to the connector shell 4 at a connection position (not shown).

Next, the configuration of the coaxial cable 21 will be described.
The coaxial cable 21 is provided with an insulating layer 23 on the outer periphery of a central conductor 22 made of copper wire or the like, and an outer conductor 24 (shield wire) made of a plurality of conducting wires (copper wires or the like) on the outer periphery thereof. An outer jacket 25 is provided on the outer side.
At the tip of the coaxial cable 21, the outer sheath 25 is removed to expose the outer conductor 24, and the center conductor 22 is exposed at the tip.
The center conductor 22 is connected to the connection portion 5 of the connector body 1 by soldering. A reference symbol P <b> 1 in FIG. 1 is a connection point between the central conductor 22 and the connection portion 5.

A plurality of coaxial cables 21 are arranged in parallel, and the outer conductors 24 of the plurality of coaxial cables 21 are collectively fixed to the ground bars 8 and 8 and are electrically connected.
The ground bars 8 and 8 are formed of a plate made of a metal such as a copper alloy or stainless steel, are disposed to face each other with the coaxial cable 21 in between, and are soldered to the external conductor 24 while being in contact with the external conductor 24 on the inner surface. It is fixed.
Hereinafter, of the two ground bars 8, the ground bar 8 on the cover shell 2 side (upper side in FIG. 1) is referred to as a ground bar 8A, and the ground bar 8 on the connector shell 4 side (lower side in FIG. 1) is the ground bar. It may be 8B.
The ground bar 8B is preferably soldered in a state of being overlapped with the inner surface 4b (upper surface in FIG. 1) of the extending portion 4a of the connector shell 4. Thereby, the connection reliability and joint strength between the ground bar 8B and the connector shell 4 are improved.

Thus, the outer conductor 24, the ground bar 8, and the connector shell 4 are integrally connected by soldering. Reference symbol P <b> 2 in FIG. 1 is a connection location of the external conductor 24, the ground bar 8, and the connector shell 4.
The coaxial cable 21 may be configured in such a manner that the jackets 25 are connected to each other by a tape-like connecting member 27 in a parallel state (see FIG. 5).

Next, a method for assembling the coaxial cable connector 10 at the tip of the coaxial cable 21 will be described.
The outer sheath 25 at the tip of the coaxial cables 21 arranged in parallel is removed to expose the outer conductor 24 and lead out the center conductor 22.

As shown in FIG. 5, the ground bar 8 </ b> B is placed on the connector shell 4. The ground bar 8B is preferably placed in a state of being overlapped with the inner surface 4b of the extending portion 4a.
The coaxial cable 21 is disposed on the ground bar 8B. At this time, the outer conductor 24 is brought into contact with the ground bar 8B.
The center conductor 22 is disposed in contact with the connection portion 5 and the center conductor 22 is soldered to the connection portion 5 (connection point P1 in FIG. 1).

Further, the ground bar 8A is disposed on the coaxial cable 21, the outer conductor 24 is sandwiched between the ground bars 8A and 8B, the ground bars 8A and 8B and the outer conductor 24 are soldered, and the ground bar 8B is connected to the connector. Solder to the shell 4.
As a result, the ground bar 8, the outer conductor 24, and the connector shell 4 are integrally connected by soldering (connection point P2 in FIG. 1).
Note that the order of the soldering operations at the connection points P1 and P2 may be any first. The soldering of the ground bar 8 to the external conductor 24 and the soldering of the ground bar 8 to the connector shell 4 may be performed simultaneously or separately.

This assembly method includes a step of soldering the ground bar 8 to the outer conductor 24 and the connector shell 4 in a state where the ground bar 8 brought into contact with the outer conductor 24 of the coaxial cable 21 is brought into contact with the connector shell 4; A process of soldering the central conductor 22 to the connection portion 5 is provided. These soldering operations can be performed by a series of operations.
Therefore, compared to the conventional method of fixing the ground bar 8 to the coaxial cable 21 prior to incorporation into the connector 10, the number of work steps can be reduced and the assembly work can be made more efficient.

Since the outer conductor 24, the ground bar 8, and the connector shell 4 are connected by soldering, the electrical resistance between the outer conductor 24 and the connector shell 4 can be reduced. For this reason, it is excellent in terms of connection reliability of the ground line as compared with the method in which the external conductor 24 is connected to the connector shell 4 through the cover shell 2.
Further, since the external conductor 24, the ground bar 8, and the connector shell 4 are directly connected by soldering, it is not necessary to connect the cover shell 2 and the ground bar 8. For this reason, the number of work processes can be reduced, and the efficiency of assembly work can be improved.
Furthermore, since soldering is adopted as a connection method in the ground line, connection reliability can be improved as compared with a case where connection by pressure welding is adopted.
Moreover, since the connection strength of the coaxial cable 21 to the ground bar 8 can be increased by adopting soldering, the connection strength of the coaxial cable 21 to the connector 10 can be increased.

It is sectional drawing which shows an example of the connector for coaxial cables which concerns on this invention. It is the top view which looked at the connector for coaxial cables shown in FIG. 1 from the cover shell side. It is a front view of the connector for coaxial cables shown in FIG. It is the top view which looked at the connector for coaxial cables shown in FIG. 1 from the connector shell side. It is explanatory drawing for demonstrating the assembly process of the connector for coaxial cables shown in FIG. It is sectional drawing which shows the connection state of the coaxial cable to an example of the conventional connector for coaxial cables. It is explanatory drawing for demonstrating the assembly process of the connector for coaxial cables shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connector main body, 2 ... Cover shell, 3 ... Holding part, 4 ... Connector shell, 4a ... Extension part, 4b ... Inner surface, 5 ... Connection part, 8 ... Ground bar, 10 ... Connector for coaxial cable, 21 ... Coaxial cable, 22 ... Center conductor, 23 ... Insulating layer, 24 ... External conductor, 25 ... Coat.

Claims (6)

An insulating layer (23) is provided on the outer periphery of the central conductor (22), an outer conductor (24) is provided on the outer periphery thereof, and the outer end of the coaxial cable (21) provided with a jacket (25) on the outer periphery thereof. A method of assembling the connector,
The connector includes a connecting portion (5) to which the central conductor is connected, an insulating holding portion (3) that holds the connecting portion, and a metal connector shell that is directly grounded to the receiving connector. (4)
Soldering the ground bar to the external conductor and the connector shell in a state where the metal ground bar (8) placed in contact with the external conductor of the coaxial cable is in contact with the connector shell; And a step of soldering the center conductor to the connecting portion.   2. The method for assembling a coaxial cable connector according to claim 1, wherein the soldering is performed with the ground bar overlaid on one surface of the connector shell.   The coaxial cable connector according to claim 1 or 2, wherein the outer conductor is sandwiched between two ground bars, and the soldering is performed in a state where one of the outer conductors is in contact with the connector shell. Assembly method.   The method for assembling a coaxial cable connector according to any one of claims 1 to 3, wherein a metal cover shell is provided so as to face the connector shell with the coaxial cable interposed therebetween. An insulating layer (23) is provided on the outer periphery of the central conductor (22), an outer conductor (24) is provided on the outer periphery thereof, and the outer end of the coaxial cable (21) provided with a jacket (25) on the outer periphery thereof. A connector assembled,
A connecting portion (5) to which the central conductor is connected, an insulating holding portion (3) for holding the connecting portion, and a metal connector shell (4) directly connected to the receiving side connector for grounding With
A metal ground bar (8) that contacts the outer conductor of the coaxial cable is in contact with the inner surface (4b) of the connector shell and is integrally soldered to the outer conductor and the connector shell,
The connecting portion is connected to the central conductor from the same side as the connector shell side when viewed from the coaxial cable,
A coaxial cable connector, wherein the central conductor is soldered to the connecting portion.   A connector for a coaxial cable, wherein a metal cover shell is provided so as to face the connector shell across the coaxial cable.

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