JPS63231887A - Attachment structure of coaxial cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a coaxial cable installation structure.

(Prior Art) For example, in communication equipment, coaxial cables can be used to electrically connect different printed wiring boards or to electrically connect different circuits formed on the same printed wiring board. be.

When using such a coaxial cable, since the coaxial cable cannot be removed once it is connected to the printed wiring board, it is generally expensive to connect the coaxial cable to the printed conductor formed on the printed wiring board. The core wire of the coaxial cable is directly connected and fixed to the printed conductor of the wiring board by soldering without using a connector.

Conventionally, in order to solder a coaxial cable to a printed conductor on a printed wiring board, a coaxial cable 1 is soldered as shown in FIG.
A printed conductor of a signal line in which the outer sheath 2 at the end of the signal line is peeled off to expose the outer conductor 3 and the insulator 4, and the core wire 5 is formed on the surface of the printed wiring board 6 while an operator holds the coaxial cable 1 in his hand. 7
Solder the connection and fix the connection, and also connect the coaxial cable 1.
The outer conductor 3 is pulled out and connected to a printed conductor 8 of an earth line formed on the surface of the printed wiring board 6 by soldering using solder 9.

(Problems to be Solved by the Invention) However, there are the following problems in connecting and fixing such a coaxial cable and a printed wiring board. That is, after the coaxial cable 1 and the printed wiring board 6 are connected, the coaxial cable 1 is supported only by the core wire 5 and the outer conductor 3 soldered to the printed conductor 7.8 of the printed wiring board 6. Therefore, the fixation of the coaxial cable 1 is uncertain, and the end of the coaxial cable 1 is in a state where it can move when an external force is applied. Therefore, when the coaxial cable 1 moves due to the application of an external force, the core wire 5 is also moved due to the external force, and an accident in which the core wire 5 breaks midway is likely to occur. In addition, when soldering the core wire 2 of the coaxial cable 1 to the printed conductor 7 of the printed wiring board 6, the coaxial cable 1 is held in hand, so the support of the coaxial cable is unstable and it is easy to move the solder. The attachment is difficult to work with. Also, coaxial cable 1
The same applies when soldering the outer conductor 3 to the printed conductor 8 of the printed wiring board 6. In particular, in order to minimize the impedance mismatch between the coaxial cable 1 and the printed conductor of the printed wiring board 6, the exposed length of the core wire 5 is made as short as possible. If the support is unstable, it will be difficult to solder the core wires 5.

The present invention has been made based on the above-mentioned circumstances, and provides work for reliably attaching a coaxial cable to a printed wiring board to prevent the occurrence of breakage of the core wire, and for connecting the coaxial cable and the printed conductor of the printed wiring board. Coaxial cable installation is intended to provide structure to facilitate the installation of coaxial cables.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the coaxial cable installation structure of the present invention includes a coaxial cable whose jacket is peeled off to expose the outer conductor, and a signal print. comprising a printed wiring board on which a conductor and a printed conductor for grounding are formed, and a fixing member made of a conductive metal crimped to the exposed outer conductor of the coaxial cable,
A receiving portion for receiving the fixing member is formed on the printed wiring board, and the fixing member is inserted into the receiving portion of the printed wiring board and connected and fixed to the grounding printed conductor by soldering, and is connected to the core wire of the coaxial cable. is characterized in that it is connected and fixed to the signal printed conductor of the printed wiring board by soldering.

(Function) The end of the coaxial cable is securely fixed by the fixing member and attached to the printed wiring board, and no external force is applied to the core wire of the coaxial cable. The wires can be soldered to printed conductors on a printed wiring board.

(Example) Embodiments of the present invention illustrated in the drawings will be described below.

1 to 4 show an embodiment of the coaxial cable installation structure of the present invention, and the same parts as in FIG. 6 are designated by the same reference numerals.

That is, numeral 1 in the figure is a coaxial cable, which is composed of a jacket 2, a net-like outer conductor 3, an insulator 4, and a core wire 5.

At the end of the coaxial cable 1, the jacket 2 is stripped off, and the core wire 5, the insulator 4, and the outer conductor 3 are exposed in stages. Reference numeral 6 denotes a printed wiring board, on one surface of which a printed conductor 7 of a signal line is formed.

A slit-shaped receiving portion 11 is formed in the printed wiring board 6 at a position close to the printed conductor 7 so as to penetrate from one surface to the other surface. The printed conductor 8 of the ground line is formed on one surface of the printed wiring board 6 and on the inner peripheral surface of the receiving portion 11.

12 is a fixing member made of conductive metal, and this fixing member 1
2 has a cylindrical shape with a diameter larger than that of the outer conductor 3 of the coaxial cable 1, as shown in Fig. 4, and is crimped onto the exposed part of the outer conductor 3 of the coaxial cable 1. installed. That is, the fixing member 12 is fitted into the exposed portion of the outer conductor 3 of the coaxial cable 1, and is deformed under pressure by an appropriate pressure device, so that the outer conductor 3
is crimped around the entire periphery of the outer conductor 3, and a portion thereof protrudes from the outer conductor 3 and is overlapped in a flat plate shape to form a tongue piece portion 12a. Note that the fixing member 12 has the same length as the length of the outer conductor 3 protruding from the outer sheath 2.

In order to attach the coaxial cable 1 to the printed wiring board 6 using this fixing member 12, the position is set so that the core wire 5 faces the printed conductor 7 of the printed wiring board 6, as shown in FIG. Then, the coaxial cable 1 is placed on one surface of the printed wiring board 6, and the tongue part 12a of the fixing member 12 attached to the coaxial cable 1 is inserted into the receiving part 11 of the printed wiring board 6.

Then, the tongue portion 12a of the fixing member 12 inserted into the receiving portion 11 of the printed wiring board 6 is soldered using the solder 13, and the tongue portion 12a is connected to the printed conductor 8 of the printed wiring board 6. In this case, the tongue portion 12a of the fixing member 12
is inserted into the receiving portion 11, which is a through hole, and soldered, so that it is securely fixed to the printed wiring board C. As a result, the coaxial cable 12 is connected to the printed wiring board 6 by the fixing member 12.
The installation is fixed. Further, the fixing member 12 electrically connects the outer conductor 3 of the coaxial cable 1 and the printed conductor 8 for the earth line of the printed wiring board 6. Furthermore, coaxial cable 1
The core wire 5 is applied to the printed conductor 7 for the signal line of the printed wiring board 6 and soldered using solder 14 to connect and fix the printed conductor 7.

Therefore, in the structure in which the coaxial cable 1 is attached to the printed wiring board 6, the end of the coaxial cable 1 is attached to the fixing member 1.
2, the coaxial cable 1 is securely fixed at a fixed position with respect to the printed wiring board 6, and does not move even if an external force is applied to the coaxial cable 1.

That is, the fixing member 12 receives the external force applied to the coaxial cable 1 and prevents it from being applied to the core wire 5. Therefore, even if an external force is applied to the coaxial cable 1, the core wire 5 of the coaxial cable 1 will not move and break due to the external force.

Further, when soldering the core wire 5 of the coaxial cable 1 to the printed conductor 7 of the printed wiring board 5, the coaxial cable 1 is fixed to the printed wiring board 5 by the fixing member 12 and stably supported so as not to move. This allows the core wire 5 to be placed stationary on the printed conductor 7 and the soldering work to be carried out easily. Furthermore, by inserting the fixing member 12 into the receiving portion 11 of the printed wiring board 5 and connecting it to the printed conductor 8, the coaxial cable 1 can be connected to the ground line of the printed wiring board 6 at the same time. In addition, the fixing member 12
The structure is simple and small, and the mounting on the printed wiring board 6 does not require a large space.

FIG. 5 shows another embodiment. In this embodiment, a window hole 15 is formed in a part of the fixing member 12, and the outer conductor 3 of the coaxial cable 1 to which the fixing member 12 is crimped is exposed to the outside through the window hole 15 of the fixing member 12. The fixation between the outer conductor 3 and the fixing member 12 is further ensured by soldering.

In the above embodiment, a cylindrical fixing member is used, and the fixing member with this configuration is suitable for attaching a coaxial cable to a printed wiring board, but it is not limited to this and can be used with other configurations. Can be used. For example, the flat plate may be crimped onto the outer conductor of the coaxial cable.

The receiving portion formed on the printed wiring board is not limited to a hole penetrating the printed wiring board, but may also be formed as a recessed portion for receiving the tongue portion of the fixing member.

[Effects of the Invention] As explained above, according to the structure of the coaxial cable installation of the present invention, the coaxial cable is securely fixed to the printed wiring board with a simple structure using a fixing member, so that the core wire of the coaxial cable can be easily fixed. It is possible to connect a coaxial cable to a printed wiring board with high reliability by preventing the occurrence of an accident in which the coaxial cable is bent.

Further, when soldering the core wire of the coaxial cable to the printed conductor of the printed wiring board, the coaxial cable can be stably supported by the fixing member and the soldering work can be easily performed.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention.
The figure is an exploded perspective view, Figure 2 is a cross-sectional view along the line ■--■ in Figure 1, Figure 3 is a cross-sectional view along the line ■-■ in Figure 1, and Figure 4 is fixed to the coaxial cable. FIG. 5 is a perspective view showing a state before the members are attached; FIG. 5 is a perspective view showing another embodiment; FIG.
The figure shows a conventional coaxial cable housing wiring board, 7.8...
Printed conductor, /11... Receiving portion, 12... Fixing member. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 4 Figure 5 Figure 6

Claims (3)

[Claims] (1) A coaxial cable whose jacket has been peeled off to expose the outer conductor,
The printed wiring board includes a printed wiring board on which a printed signal conductor and a printed grounding conductor are formed, and a fixing member made of conductive metal that is crimped to the exposed outer conductor of the coaxial cable, and the printed wiring board has A receiving portion for receiving a member is formed, the fixing member is inserted into the receiving portion of the printed wiring board and connected and fixed to the grounding printed conductor by soldering, and the core wire of the coaxial cable is connected to the signal wire of the printed wiring board. A coaxial cable installation structure characterized by being connected and fixed to a printed conductor by soldering. (2) The coaxial cable mounting structure according to claim 1, wherein the receiving portion is a through hole. (3) The coaxial cable mounting structure according to claim 1, wherein the fixing member is soldered to the outer conductor of the coaxial cable.