JPH0336084Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of an antenna mechanism mounted on the vehicle body.
Effectively grounding can be achieved without the need for special drilling on the car body surface or screwing of grounding metal fittings, and moreover, it can be stably and accurately attached to the car body surface without damaging the painted surface of the car body. This is how it was done.

It is well known that in order to mount an antenna on a car body, it is necessary to connect a ground between it and the car body. Generally, they are connected using screws, but this requires drilling screw holes in the vehicle body, which can lead to damage to the vehicle body. Therefore, it is conceivable to ground such an in-vehicle antenna using capacitance, but in this case, a grounding plate with a certain width is placed on the paint layer on the surface of the car body, and the ground plate is placed on the paint layer on the surface of the car body. There is a strong tendency to not be able to form a stable setting on curved surfaces. On the other hand, it is common to use a mechanical mounting structure to mount such antennas on the car body, but in order to achieve this mechanical mounting, a special mounting position such as a gutter part of the car body must be selected, and it is also special and complicated. It is essential to use suitable mounting hardware. Of course, it can also be attached to a flat surface of the vehicle body, but in this case, a plurality of holes or openings for attachment would be formed in the vehicle body, which would result in severe damage to the vehicle body. For this reason, various studies have been made to eliminate the need for drilling holes to install the antenna as described above, and proposals have been made to use magnets and suction cup structures, but these methods are theoretically impossible. Even if it appears to be attached, in practice, it is not possible to obtain a stable attachment relationship to the stacked antennas. Accurate installation is difficult to achieve without using mounting brackets or a strong adhesive. However, using adhesive in this way stains the beautifully finished painted surface of the car body, and especially when changing the mounting position, the painted surface may peel off or the adhesive may remain stuck to the car body surface. This leaves an unsightly trace. Of course, it is obvious that attachment cannot be accomplished unless the adhesive is specially prepared.

The present invention has been devised after repeated studies in view of the above-mentioned circumstances, and to explain its specific embodiment as shown in the attached drawings, the antenna mounting mechanism as shown in Figs. propose. That is, as shown in FIG. 1, the core portion 4a having the core wire 4a' of the insulated cable 4 is inserted into the base 2 on which a suitable antenna 1 is attached, and the coated wire 4b' of the cable 4 is inserted into the base metal fitting 6. A suction cup 12 made of rubber or soft synthetic resin is attached to the base body 2, a cap-shaped earth plate 3 is embedded in the suction cup 12, and the center of the earth plate 3 is An engaging part 3a provided at the base member 2 is screwed onto the base metal fitting 6, and a magnet 8 is installed inside an annular bent part 3b formed by bending the circumferential side of the ground plate 3. An insertion opening 5 is formed, the cable 4 is attached thereto, and the waterproof cap 10 is appropriately covered, and the bottom surface of the suction cup 12 is normally formed with a recessed part 12a with a sufficiently recessed central portion to form a suction surface. This is a well-known fact.

In the illustrated example, a ring-shaped magnet is used as the magnet 8, and a coating layer 9 is formed on the bottom surface of the opening.

According to the present invention as described above, the cap-shaped ground plate 3 is embedded in the suction cup 12, and since the magnet 8 is built in the ground plate 3, the ground plate 3 and the magnet 8 are In other words, it is possible to connect the vehicle body 20 to the vehicle body 20 without peeling off the paint or creating holes at any location on the vehicle body where the paint layer has been applied.
However, the ground plate 3 is buried in the suction cup 12 and is not exposed to the outside. Since it is made of a reasonably soft material and is formed to have a large joint surface with the vehicle body 20, it is possible not only to attach it using the vacuum attraction phenomenon as shown in FIG. Since the effect is also obtained, the installation becomes extremely stable. In particular, since the ground plate 3 is cap-shaped and covers the back side of the magnet 8, the direction of the magnetic field lines of the magnet 8 is directed toward the front side (inner surface of the suction cup 12, that is, toward the vehicle body surface 10 in FIG. 3).
The attraction force of the magnet 8 itself is increased (more than twice that of the case without such a cap-like magnetic material) by concentrating on the magnet 8.
Since a strong suction effect is obtained, an accurate suction relationship as shown in FIG. 3 of the suction cup 12 is ensured, and stable installation can be achieved over a long period of time. Therefore, even if the installation is performed using a single suction cup 12, it is possible to achieve an installation that does not substantially require adhesives, and since no adhesives are required, there is no possibility of staining or damaging the car body paint. Grounding can be achieved without the need for drilling or other processing on the vehicle body itself, and it is also possible to mount the antenna itself.

As described above, the device according to the present invention can achieve both grounding and antenna installation without damaging either the vehicle body or its paint.Moreover, its structure consists of a magnet 8 and a suction cup 1.
2 are integrated, and the ground plate 3 is also used as a magnetic field line converging member for the magnet 8, so it is very simple and compact, comparable to the conventional simple suction cup structure, and it is possible to paint the car body surface with good appearance. Since the suction cup 12 acts as a cushion when attracted by the magnet 8, it does not damage the painted surface of the vehicle body, and when removing the suction cup 12, a part of the suction cup 12 is peeled off to break the vacuum, which provides a large suction force. Not only can the antenna be removed by half, but also the peripheral part of the suction cup 12 conforms well to the curvature of the vehicle body surface, which together provide an easy-to-handle antenna mounting mechanism that is low cost and easy to handle. This is a highly effective idea in practical terms.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
FIG. 1 is a general side view of the antenna mechanism according to the present invention, FIG. 2 is a bottom view thereof, and FIG. 3 is an enlarged cross-sectional view showing the state in which the antenna mechanism is mounted on a vehicle body. However, in these drawings, 1 is an antenna,
2 is a base, 3 is a cap-shaped earth plate, 4 is a cable, 4a is its core wire, 4b is its covered wire, 8 is a magnet, and 12 is a suction cup.

Claims (1)

[Scope of utility model registration request] A suction cup is provided at the bottom of the base to which the antenna is attached, and a grounding plate is installed inside the suction cup to which the sheathed wire of the cable whose core wire is connected to the antenna is connected,
A magnet is provided in the ground plate, and a capacitive ground is established between the ground plate and the magnet and the vehicle body, and the attraction effect of the suction cup and the attraction effect of the magnet are used together to fix the vehicle body. A vehicle-mounted antenna mechanism featuring: