JP2000285990A - Coaxial cable fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial cable fixture capable of easily fixing a coaxial cable to an installing surface of a substrate for example, suppressing loss of the coaxial cable, and preventing the generation of wiring troubles. SOLUTION: A coaxial cable fixture for fixing a coaxial cable U to an installing surface Xa of a substrate for example has an outer conductor contact part 1 which is inserted from a slit formed in an insulating outer sheath U4 of the coaxial cable U and arranged between the insulating outer sheath U4 of the coaxial cable U and an outer conductor U3, and a fixing part 2 continuing to the outer conductor contact part 1 and fixed to the installing surface Xa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable fixing bracket for fixing a coaxial cable to an installation surface such as a substrate.

[0002]

2. Description of the Related Art As shown in FIG. 5, a coaxial cable U used for high-frequency signal transmission or television transmission has a transmission conductor U1 disposed at the center surrounded by an insulator U2.
Further, the periphery is covered with an external conductor U3 for noise shielding, and the whole is covered with an insulating outer skin U4. In order to sufficiently obtain the shield effect of the coaxial cable, generally, the insulating sheath U4 at the end is partially peeled off, and the outer conductor U3 is fixed by GND connection. That is, the insulating outer skin U4, the outer conductor U3, and the insulator U2 are peeled off in a stepwise manner, and the exposed outer conductor U3 is fixed by GND connection by the fixing bracket 20 or soldering.

[0003]

However, when the coaxial cable U is fixed as described above, the portion W of the transmission conductor U1 that is not covered with the outer conductor U3 becomes longer, and the frequency band of a signal to be transmitted is high. Another problem is that the loss (attenuation) increases. Further, when the entire length of the coaxial cable U is short, there is a possibility that only the insulating sheath U4 may shift in the axial direction and move.
It is necessary to take measures such as additionally attaching a fixture 21 for fixing the fixing member 4. Further, when the external conductor U3 is fixed by soldering, the insulator U2 and the insulating sheath U4 are often melted by the heat of the solder, and wiring problems are likely to occur.

[0004] The present invention has been made in view of such a problem, and can easily fix a coaxial cable to an installation surface such as a substrate, and can suppress loss of the coaxial cable. Further, it is another object of the present invention to provide a coaxial cable fixing bracket in which a wiring failure hardly occurs.

[0005]

According to a first aspect of the present invention, there is provided a coaxial cable fixing bracket for fixing a coaxial cable to an installation surface of a substrate or the like. Adopts a technology that has an external conductor contact portion inserted from the cut notch and arranged between the insulating sheath of the coaxial cable and the external conductor, and a fixing portion connected to the external conductor contact portion and fixed to the installation surface Is done. According to a second aspect of the present invention, in the coaxial cable fixing bracket of the first aspect, a technique is employed in which the outer conductor contact portion is formed to be curved so as to be in contact with the outer peripheral surface of the outer conductor of the coaxial cable. The invention according to claim 3 is the invention according to claim 1 or 2
In the above-mentioned coaxial cable fixing bracket, a technique is adopted in which the thickness of the outer conductor contact portion inserted into the coaxial cable at the end side is small. The invention according to claim 4 is the coaxial cable fixing bracket according to any one of claims 1 to 3,
The external conductor contact portion is formed to extend in one direction with a substantially C-shaped cross section, and the fixed portion is formed to extend in one direction with a substantially L-shaped cross section, A technique is employed in which one end edge of the external conductor contact portion and one end edge of the fixed portion are connected to each other. According to a third aspect of the present invention, in the coaxial cable fixing bracket according to any one of the first to fourth aspects, a technique is employed in which the fixing portion has a mounting surface to be soldered to the installation surface. With these techniques, the above-described problems can be solved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a perspective view showing the coaxial cable fixing fitting S according to the present invention. The fixing fitting S is formed of a metal plate member having good conductivity, and includes an external conductor contact portion 1 and a fixing portion 2. The surface of the fixture S is plated with silver or gold to enable soldering. The coaxial cable U fixed by the fixing bracket S is
The transmission conductor U1 at the center is surrounded by an insulator U2, the periphery thereof is covered with an external conductor U3 for noise shielding, and the whole is covered with an insulating sheath U4.

The external conductor contact portion 1 has a substantially C-shaped cross section and is formed to extend in one direction, and one end is connected to one end of the fixed portion 2. Furthermore, the plate thickness is gradually reduced from the connected one end edge to the opposite other end edge, and the edge is formed sharp. The outer conductor contact portion 1 is formed to be curved with a predetermined inner diameter according to the outer shape of the outer conductor U3 so that the inner surface 1a is in contact with the outer peripheral surface of the outer conductor U3 of the coaxial cable.

The fixing portion 2 has a substantially L-shaped cross section and is formed to extend in one direction, and is connected to the joint surface 2 in contact with the installation surface Xa.
a. Further, a mounting surface 2b to be soldered to the installation surface Xa is formed near the end edge opposite to the side connected to the external conductor contact portion 1 so as to be substantially perpendicular to the installation surface Xa. I have.

In such a coaxial cable fixing bracket S, as shown in FIG. 3, the outer conductor contact portion 1 is inserted between the insulating outer cover U4 of the coaxial cable U and the outer conductor U3 to fix the coaxial cable U. . That is, a cut is formed in the insulating outer skin U4 in the axial direction, and the outer conductor contact portion 1 of the fixture S is inserted in the circumferential direction from the cut. Thereby, the inner surface 1a of the outer conductor contact portion 1 comes into contact with the outer peripheral surface of the outer conductor U3. At this time, the outer conductor contact portion 1 is pressed against the outer conductor U3 by the elastic force of the insulating sheath U4, and the outer conductor contact portion 1 and the insulating sheath U4
A large frictional resistance acts between the external conductor contact portion 1 and the external conductor U3. Therefore, the outer conductor contact portion 1 is hardly displaced inside the coaxial cable U, and the coaxial cable U
Then, the fixture S is firmly inserted. At this time, if the outer conductor contact portion 1 is caulked with pliers or the like from the outside of the insulating outer skin U4, the above-mentioned inserted state is further strengthened.

The fixing member S is fixed by setting the joint surface 2a of the fixing portion 2 on an installation surface Xa of a substrate or the like, and soldering the mounting surface 2b to a ground surface. At this time, there is no need to solder the coaxial cable itself,
It is unlikely that a part of the coaxial cable is melted. Further, by soldering the fixing metal S in contact with the external conductor U3 at the external conductor contact portion 1 to the ground surface, the coaxial cable is GND-connected, and a sufficient shielding effect can be obtained. Further, since the fixing bracket S connects the coaxial cable U to GND without peeling off the insulating sheath U4,
The portion of the transmission conductor U1 that is not covered with the outer conductor U3 is short, and loss (attenuation) of a transmitted signal can be suppressed.

FIG. 4 is a perspective view showing a coaxial cable fixing bracket T according to another embodiment of the present invention. In the fixing bracket T of the present embodiment, the joining surface 2a shown in the above-described embodiment is formed relatively wide, and the mounting surface 2
A mounting hole 2c for fixing with a bolt or the like instead of b is formed. While the above-described embodiment is effective when a relatively thin coaxial cable U is installed in a narrow space, in the present embodiment, a relatively thick coaxial cable U is used.
Can be easily installed without soldering.

[0012]

As described above, according to the present invention, the following effects can be obtained. The coaxial cable fixing bracket according to claim 1 includes an external conductor contact portion that is inserted from a cut formed in the insulating outer sheath of the coaxial cable and is disposed between the insulating outer sheath of the coaxial cable and the outer conductor. The coaxial cable can be easily GND connected and fixed without peeling off the insulating sheath of the coaxial cable. In addition, since the coaxial cable can be connected to GND without stripping the insulating sheath, the portion of the transmission conductor that is not covered with the outer conductor can be shortened, and loss (attenuation) can be suppressed. Furthermore, the outer conductor contact portion is pressed against the outer conductor by the elastic force of the insulating sheath, and a large frictional resistance acts between the outer conductor contact portion and the insulating sheath and between the outer conductor contact portion and the outer conductor. Therefore, the outer conductor contact portion is less likely to shift inside the coaxial cable. For this reason, the fixing bracket is firmly inserted into the coaxial cable, and a wiring failure hardly occurs.

According to the second aspect of the present invention, the outer conductor contact portion is formed so as to be curved so as to be in contact with the outer peripheral surface of the outer conductor of the coaxial cable. GND connection can be performed by more reliably contacting the outer peripheral surface of the conductor. Further, the outer conductor contact portion can be easily inserted into the coaxial cable along the outer peripheral surface of the outer conductor.

According to the third aspect of the present invention, since the outer conductor contact portion inserted into the coaxial cable has a small thickness on the edge side, the external conductor contact portion is formed in the cut formed in the coaxial cable. Can be more easily inserted.

According to a fourth aspect of the present invention, the outer conductor contact portion has a substantially C-shaped cross section and extends in one direction, and the fixed portion has a substantially L-shaped cross section. The one end edge of the external conductor contact portion and the one end edge of the fixing portion are connected to each other, so that they can be easily formed by a plate-like member.

According to the fifth aspect of the present invention, since the mounting surface to be soldered is formed on the installation surface, there is no need to solder the coaxial cable itself.
It is unlikely that a part of the coaxial cable is melted, and wiring defects are less likely to occur.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a coaxial cable is fixed using an embodiment of a coaxial cable fixing bracket according to the present invention.

FIG. 2 is a perspective view showing one embodiment of a coaxial cable fixing bracket according to the present invention.

FIG. 3 is a view as viewed in the direction of the arrow A shown in FIG. 1;

FIG. 4 is a perspective view showing another embodiment of the coaxial cable fixing bracket according to the present invention.

FIG. 5 is a side view showing a state in which a coaxial cable is fixed using a conventional fixing bracket.

[Explanation of symbols]

 S, T Coaxial cable fixing bracket U Coaxial cable U1 Transmission conductor U2 Insulator U3 Outer conductor U4 Insulation sheath 1 Outer conductor contact part 1a Inner surface 2 Fixed part 2a Joint surface 2b Mounting surface Xa Installation surface

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[Procedure amendment]

[Submission date] January 13, 2000 (2000.1.1)
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

According to a first aspect of the present invention, there is provided a coaxial cable fixing bracket for fixing a coaxial cable to an installation surface of a substrate or the like. An outer conductor contact portion that is inserted in the circumferential direction from the cut notch and that is disposed between the insulating sheath and the outer conductor of the coaxial cable, and a fixing that is connected to the outer conductor contact portion and fixed to the installation surface And a technology comprising a unit. According to a second aspect of the present invention, in the coaxial cable fixing bracket of the first aspect, the outer conductor contact portion has an inner surface with a coaxial cable.
A technique that is formed so as to be in contact with the outer peripheral surface of the outer conductor of the cable is adopted. The invention according to claim 3 is
According to the first or second aspect of the present invention, a technique is employed in which the outer conductor contact portion inserted into the coaxial cable has a small thickness on the edge side. According to a fourth aspect of the present invention, in the coaxial cable fixing bracket according to any one of the first to third aspects, the outer conductor contact portion is formed to have a substantially C-shaped cross section and to extend in one direction and to be fixed. The portion is formed so as to have a substantially L-shaped cross section and extend in one direction, and a technique is adopted in which one end edge of the external conductor contact portion and one end edge of the fixed portion are connected to each other. The invention according to claim 5 is
5. The mounting bracket according to claim 1, wherein the fixing portion has a mounting surface to be soldered to the mounting surface.
A technology that is formed so as to be substantially perpendicular to the mounting surface is employed. With these techniques, the above-described problems can be solved.

Claims (5)

[Claims] 1. A coaxial cable fixing bracket for fixing a coaxial cable to an installation surface such as a substrate, wherein the metal fitting is inserted from a cut formed in an insulating sheath of the coaxial cable, and is provided between an insulating sheath of the coaxial cable and an external conductor. A coaxial cable fixing fitting, comprising: an external conductor contact portion disposed therebetween; and a fixing portion connected to the external conductor contact portion and fixed to the installation surface. 2. The coaxial cable fixing bracket according to claim 1, wherein the outer conductor contact portion is formed so as to be curved so as to contact an outer peripheral surface of an outer conductor of the coaxial cable. 3. The coaxial cable fixing bracket according to claim 1, wherein the outer conductor contact portion is formed such that a thickness of an edge side to be inserted into the coaxial cable is thin. 4. The external conductor contact portion has a substantially C-shaped cross section and is formed to extend in one direction, and the fixing portion has a substantially L-shaped cross section and extends in one direction. The coaxial cable fixing bracket according to any one of claims 1 to 3, which is formed so as to extend, and one end edge of the outer conductor contact portion and one end edge of the fixing portion are connected to each other. 5. The coaxial cable fixing bracket according to claim 1, wherein the fixing portion has a mounting surface to be soldered to the installation surface.