JPS6335496Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention The invention relates to a grounding structure for a coaxial cable in a unit such as a wireless device, and in particular a coaxial cable with an L-shaped grounding fitting interposed between a coaxial plug and a unit. This relates to the cable grounding structure.

(b) Conventional Techniques and Problems In conventional radio equipment, input from an antenna is connected to a coaxial plug attached to a unit, and input is input to a coaxial cable connected to the coaxial plug. Figures 1 and 2 show side cross-sectional views of the grounding structure of the coaxial cable when the coaxial connector and coaxial cable are connected in this unit, and 1 shows the hole 11 for the coaxial connector 2. 3 is a tightening screw that fixes the coaxial plug 2 to unit 1, 4 is a lug terminal, and 5 is a lug terminal 4.
A tightening nut fixes the to the tightening screw 3, 6 is the core wire 6
1 is a coaxial cable consisting of an external conductor 62; 7 is a unit having a mounting hole 71 for the coaxial plug 2 and a lug terminal mounting hole 72; 8 is a mounting screw for the lug terminal 4.

After inserting the coaxial plug 2 into the coaxial plug mounting hole 11 or 71 drilled in the unit 1 or 7 and fixing it with the tightening screw 3, the tightening screw 3 is shown in FIG.
The lug terminal 4 is fitted into one of the terminals and tightened with the tightening nut 5 to form a ground terminal. In FIG. It is fixed with the mounting screw 8 and the tightening nut 5 to form a ground terminal, and the core wire 61 of the coaxial cable 6 is connected to the coaxial plug 1 by soldering or the like.
The outer conductors 62 were each connected to a ground terminal formed by the lug terminal 4 by soldering or the like. However, in either case, assembly efficiency is poor due to the provision of a ground terminal, and furthermore, since the bond between the core wire 61 and the outer conductor 62 separates, the lengths of the core wire 61 and the outer conductor 62 of the coaxial cable 6 are different, resulting in input signal characteristics. There was a problem in that the value decreased.

(c) Purpose of the invention In view of the above conventional problems, the present invention provides an L-shaped grounding fitting between the coaxial connector and the unit to connect the outer conductor of the coaxial cable as close as possible to the core wire. The purpose is to provide a grounding structure for coaxial cables.

(d) Structure of the invention In order to achieve the above-mentioned object, the present invention provides a grounding structure for a coaxial cable in a unit when an external input is connected to the coaxial cable in the unit via a coaxial connector, The grounding structure is connected to the coaxial plug and the L for grounding between the unit.
This is achieved by interposing a grounding fitting and forming a corresponding notch in the bent portion of the L-shaped grounding fitting in the mounting hole of the coaxial plug.

(e) Example of the invention An example of the earthing structure of the coaxial cable according to the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a diagram for explaining one embodiment of the present invention.
9 is a perspective view before assembly, b is a side sectional view of the main part, and the same parts as in the previous figure are given the same reference numerals.
10 is a unit having a coaxial plug insertion hole 91 and a notch 92, and 10 is an L-shaped grounding fitting that is interposed between the unit 9 and the coaxial plug 2 and has a bent portion 101.

First, insert an L-shaped plug into the coaxial plug mounting hole 91, which has a coaxial plug mounting hole 91 in the unit 9, and a notch 92 along the circumference of the mounting hole 91 through which the bent part 101 of the L-shaped grounding fitting 10 is inserted. The coaxial plug 2 is inserted into the coaxial plug mounting hole 91 with the grounding fitting 10 in contact with the L-shaped grounding fitting 10, so that both the L-shaped grounding fitting 10 and the coaxial fitting 2 can be connected to a plurality of pieces. When screwed together with the tightening screw 3, the center conductor of the coaxial plug 2 and the bent portion 101 of the L-shaped ground fitting 10, that is, the ground terminal, are placed close to each other. Thus, by bonding the center conductor of the coaxial plug 2 and the core wire 61 of the coaxial cable 6 and soldering the outer conductor 62 to the bent portion 101 of the L-shaped ground fitting 10, that is, the ground terminal, the core wire 61 There is no significant difference between the length of the bare wire and the length of the outer conductor 62.

Note that since the L-shaped grounding fitting 10 is used as a grounding terminal, depending on the surface finish of the unit 9,
In order to ensure good contact, it is preferable to interpose a chrysanthemum washer or the like between the L-shaped ground fitting 10 and the unit 9 and tighten them.

(f) Effect of the invention As is clear from the above explanation, the coaxial cable grounding structure according to the invention improves assembly work efficiency and improves input signal characteristics compared to the grounding structure using conventional lug terminals. It has the advantage of preventing deterioration.

[Brief explanation of drawings]

1 and 2 are side sectional views for explaining a conventional coaxial cable grounding structure, and FIG. 3 is a side sectional view for explaining an embodiment of a coaxial cable grounding structure according to the present invention. A perspective view, b is a side sectional view of a main part. In the figure, 1, 7 and 9 are units, 2 is a coaxial plug, 3 is a tightening screw, 4 is a lug terminal, 5 is a tightening nut, 6 is a coaxial cable, 8 is a lug terminal mounting screw, and 10 is an L-shaped 11, 71 and 91 are coaxial plug mounting holes, 61 is a core wire, 62 is an external conductor, 72 is a lug terminal mounting hole, and 101 is a bent portion, respectively.

Claims (1)

[Scope of utility model registration request] A grounding structure of a coaxial cable when an external input is connected to a coaxial cable in a unit via a coaxial connector, wherein the grounding structure of the coaxial cable is connected to an L for ground connection between the coaxial connector and the unit. In addition to interposing a shaped grounding metal fitting,
A grounding structure for a coaxial cable, characterized in that a notch corresponding to the bent portion of the L-shaped grounding fitting is formed in the mounting hole of the coaxial plug.