JPS6125302A - Antenna earth mounting structure on automobile - Google Patents

Abstract

PURPOSE:To decrease the path of earthing from a feeding point without destroying a rust proof treatment layer of a cabin panel by providing an earth wire between an upper mounting part formed in the vicinity of the feeding point and the cabin pannel. CONSTITUTION:An antenna terminal 23 and a cabin terminal 24 are connected to both ends of an earthing wire 22. Then the antenna terminal of the earthing wire 22 is fixed to the upper mounting part 7 formed in the vicinity of the feeding point 16. On the other hand, the cabin terminal 24 of the earthing wire 22 is fixed to a cabin inner panel 2 placed in the vicinity of the feeding point 16 by a screw 25. Since the earthing wire is provided, the path of earthing from the feeding point is decreased without destroying the rust proof treatment layer of the cabin panel.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an antenna ground mounting structure for an automobile.

An example of a conventional antenna mounting structure for an automobile is shown in "Nilasan Bluebird Maintenance Manual", pages 1-53, published by Nissan Motor Co., Ltd. on December 1, 1980. To explain this as shown in Fig. 5.6, L indicates the vehicle body outer panel of the rear fender section, 2 indicates the vehicle body inner panel of the rear fender section, and 3 indicates the telescopic type antenna body, which is disposed at the bottom of the antenna body 3. A bracket 5 as an upper mounting part of the drive unit 4 is fixed to the vehicle body inner panel 2 with screws 6, while a spacer 8 is attached to the upper mounting part 7 of the antenna main body 3, and a vibration-proofing rubber 9 is arranged overlappingly on the spacer 8. , the tip of the upper attachment part 7 that protrudes from the anti-erosion rubber 91 is formed on the outer panel 1 of the vehicle body, and inserted into the skin attachment hole 10 from the back side of the outer panel 1 of the vehicle body. Fit the waterproof rubber 11 on the outer periphery of the attachment part 7 and the nine base L overlapping the waterproof rubber 11, and tighten the nut 13 from above the base 12 to the screw s14 of the upper mounting 8 (s7) to attach the upper mounting. The part 7 is fixed to the vehicle body outer panel 1. The antenna rod 15 is installed in the antenna main body 3 and extends and contracts to the required length for the rotation of the output shaft of the drive part 5. The antenna 16 is installed near the upper part a7. 1ff outside of main body 3
17 is a stopper for preventing rotation of the spacer, which is provided in a protruding manner on the outer circumferential surface of the upper mounting portion 7 and formed in a notch in the spacer 8 and arranged in the locking groove 18; 19 is the outer periphery of the antenna body 3; This is the flange of the upper mounting portion 7 that protrudes from the surface and receives the spacer 8. The ground path of the antenna is the antenna body 3. A trap is formed to reach the one-tonne inner panel 2 via the casing of the drive unit 4 and the bracket 6.

Problem to be Solved by the Invention Therefore, as shown in FIG. 7, a ground terminal 21 having a protruding claw portion on the upper surface of the outer edge is interposed between the first spacer 8 and the vibration-proofing rubber 9. Although it is conceivable to shorten the ground path described above by biting the tip of this claw part into the flap of the vehicle body outer panel 1, the back side l1iilrK of the vehicle body outer panel 1 is formed due to the biting of the claw part. It is unfavorable in terms of rust prevention because it destroys a part of a certain rust prevention treatment layer.

Therefore, the present invention provides an antenna ground viewing structure for an automobile that can shorten the ground path from the power feeding point without damaging the rust-proof structure.

Means for Solving the Problems In the present invention, one end of the ground wire is connected to an upper mounting part formed near the feed point of the antenna body, and the other end of the ground wire is connected to a single unit near the feed point. It is fixed to the panel.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

In FIGS. 1 to 3, the bracket 5 of the drive unit 4 is fixed to the vehicle body inner panel 2 with screws 6, while the earth @, which will be described later, is connected between the collar 19 of the upper mounting part 7 and the single outer panel 1.
9 antenna side terminal B coupled to one end of 22, 9 spacer 8 superimposed on this antenna side terminal n, and this spacer 8
Insert the upper mounting part 7 into the mounting hole 10 of the single outer panel L with the overlapping vibration-proofing rubber 9 interposed therebetween, and attach the waterproof rubber 11 and the waterproof rubber 11 to the outer periphery of the upper mounting part 7 that protrudes from the outer surface of the vehicle body outer panel 1. By fitting the polymerized base 12 onto the waterproof rubber 11 and screwing the nut 13 into the threaded portion 14, the anti-vibration rubber 9 is brought into close contact with the back surface of the vehicle body outer panel 1 and the upper end surface of the spacer 8. At the same time, the upper mounting portion 7 is fixed to the vehicle body outer panel IK by bringing the waterproof rubber 9 into close contact with the outer surface of the single outer panel L and the lower end surface of the base 12. n indicates a ground wire, an antenna side terminal is fixed to one end of this ground wire n, a unit side terminal is fixed to another end of the ground wire n, and this vehicle body side ground terminal is placed near the feed point 16. It is fixed to the vehicle body inner panel 2 with screws 6. A through hole 3 is fitted into the outer periphery of the upper mounting portion 7 by passing through a stopper 17 for the antenna side terminal.
, and a positioning protrusion n protruding from the lower opening of the locking groove 18 of the spacer 8 is formed at the negative part of the hole edge of the through hole.
has been established.

According to the above embodiment structure, before inserting the claw body outer panel 1 into the mounting hole 10, the antenna side terminal field is fitted into the upper mounting part 7, and the positioning protrusion 4 is arranged directly below the stopper 17. , insert the spacer 8 into the upper mounting part 7, insert the stopper 17 into the locking groove 18, and insert the positioning protrusion s.
27 is also positioned at the opening of the locking groove 18, so that the antenna side terminal field can be placed close to the feeding point 16. In addition, the electric body III terminals can be fixed to the vehicle body inner panel 2 near the power supply point 16 with screws without damaging the anti-rust layer on the sono panel surface with the claws. Child illusion.

The ground 1Is22 can be shortened by arranging the ground 1Is22 close to each other. Furthermore, by locating the positioning protrusion n in the locking groove 18, the connecting part of the antenna side terminal B to the ground wire 4 can be directed toward the skin part of the car body inner panel 2 where the car body side terminal part is attached. In addition, since the direction of the antenna side terminal B is regulated, the length of the ground wire n can be minimized.

In the above embodiment, the positioning part n for closing the antenna side terminal is erected from the edge of the through hole 3, but as shown in FIG. Even if the positioning portion 27A is formed to protrude across the radial direction of the annular portion of the antenna side terminal field, the same effect can be obtained.

Furthermore, depending on the case, it may be possible to configure the antenna side terminal % in a U-shape, form a positioning part on one of the contact pieces, and fit it into the upper mounting part 7 from the radial direction.

Note that the antenna main body 2 may be attached to a portion other than the rear fender portion, and antennas other than the telescopic type may be used.

Effects of the Invention As described above, according to the present invention, one end of the ground wire is connected to the upper mounting part formed near the power feeding point, and the other end of the grounding wire is fixed to a single piece (flannel) near the feeding point. So,
The length of the ground wire can be shortened without destroying the anti-rust layer of the vehicle body panel, which has the practical effect of improving the sensitivity of the antenna to FM.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, FIG. 2 is an exploded perspective view of the same embodiment, FIG. 3 is an enlarged cross-sectional view showing the main parts of the same 1ffAflI, and FIG. FIG. 5 is a sectional view showing a conventional antenna mounting structure, FIG. 6 is an enlarged sectional view of the main part of the antenna mounting structure, and FIG. 7 is a different conventional example. FIG. 7 is a cross-sectional view similar to FIG. 6 shown in FIG. 1... Vehicle body outer panel, 2... Vehicle body inner panel, 3... Antenna body, 5... Bracket, 7...
・Upper mounting part, η...Ground wire, Ru...Antenna side terminal, Sae...Vehicle side terminal. Figure 1 Figure 3 Figure 2 Figure 4 Figure 6 Figure 5 Figure 7

Claims (1)

[Claims] The antenna main body is fixed to the vehicle body panel at its upper and lower mounting parts, and a power feeding point is formed near the upper mounting part of the antenna main body, one end of a ground wire is connected to the upper mounting part, and the ground wire is connected to the upper mounting part. An antenna ground mounting structure for an automobile, characterized in that the other end is fixed to a vehicle body panel near the feeding point.