JPH0514029A - Circuit module for automobile glass antenna - Google Patents

Abstract

(57) [Abstract] [Purpose] To mount electronic circuits compactly and with high productivity on automobile window glass plates. [Structure] A circuit board 9, an electronic component 10 mounted on the circuit board 9, a circuit connected to a circuit on the circuit board 9, and extending downward from the circuit board 9, and an extension portion thereof in the horizontal direction. The circuit board 9 is made of a bent metal plate-shaped or rod-shaped electrode 7 and is resin-molded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile glass antenna circuit module (hereinafter referred to as a circuit module) and the like.

[0002]

2. Description of the Related Art In a glass antenna for an automobile, as shown in Japanese Utility Model Publication No. 52-48681, "Antenna window glass", an antenna wire made of a metal wire is enclosed in a laminated glass plate and the periphery of the antenna is surrounded. It has been proposed to reduce the size of the laminated glass by mounting the circuit component on the notched portion of the peripheral edge of the laminated glass.

However, in this conventional example, when an antenna is installed on the rear glass of an automobile, for example, the circuit parts are smaller than the glass shape, so that the soldering work is difficult, or the rear glass is generally used. Since it is a curved glass in terms of body design, there are many problems in mounting components. Further, in the case of an antenna that receives a radio wave having a short wavelength, dimensional accuracy for soldering a component on a glass surface is strictly required. From an aesthetic point of view, it is not desirable to mount parts on the glass surface, and there is a drawback that productivity is poor.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to have a drawback that the prior art has, that is, the soldering work is difficult, and the mounting position accuracy is high in the case of an antenna for short wavelength or the like. It also eliminates aesthetically unpleasantness and there is no room for lower prices.

[0005]

The present invention has been made to solve the above-mentioned problems, and is connected to a circuit board, electronic components mounted on the circuit board, and circuits on the circuit board. And a metal plate-shaped or rod-shaped electrode that extends downward from the circuit board and has its extending portion bent in the horizontal direction, and the circuit board is resin-molded. The present invention provides a circuit module for an automobile glass antenna.

[0006]

[Function] Since the antenna peripheral circuit module is mounted adjacent to the antenna conductor and the defogger conductor on the glass plate surface, the wiring is electrically short, and the wiring is a pattern. Is always constant. Further, the antenna conductor and the circuit module of the present invention are integrated by connection such as soldering, so that electrical adjustment can be performed integrally. As the antenna peripheral circuit, in addition to the matching circuit and the anti-resonance circuit, the packaged top loading circuit module may be connected to one end of the glass face plate other than the feeding point.

[0007]

Embodiments Embodiments will be described below with reference to the drawings. Figure 1
Is a perspective view of the circuit module of the embodiment, and FIG. 2 is a side view of the circuit module.

A circuit board 9 made of resin or ceramics, an electronic component 10 such as a resistor, a condenser, a coil semiconductor, etc. which constitutes a matching circuit are mounted, and further metal fittings 7, 8 are mounted.
Is a leg, and the metal fitting 7 having a function as an electrode is connected to the feeding point of the antenna conductor on the glass plate surface, and the metal fitting 8 is connected to the dummy terminal on the glass surface 1 and further to the signal to the receiver. It is integrated with or connected to the connector 20 for transmission.

After mounting the electronic component 10, the circuit board 9 is made highly reliable by the transfer molding method of the resin 11. By adopting the transfer molding method, it is possible to reduce the resin thickness from the surface of the component, so that a compact module can be manufactured. The resin 11 is preferably epoxy.

L is the distance between the bending point of the metal fitting 7 and the resin 11. Alternatively, the circuit board 9 may be placed in a resin case and sealed with the resin 11. The resin case is preferably a cube and preferably has an opening on one surface thereof. The assembling method is to insert the component 1, the metal fittings 7 and 8 connected to the circuit board 9 by a method such as soldering, with the surface of the opening facing upward, into the resin case.

From the resin case, only the metal fittings 7 and 8 as the legs are projected. Then, from the surface of the opening, resin 1
Inject 1. This structure has better productivity than that of FIG. The resin 11 is preferably epoxy. The resin case may be a ceramic case or other materials. Further, the metal fittings 7 and 8 may be extended from any of the upper, lower and side surfaces of the resin case or the like, and it depends on the specifications to be mounted on the glass plate surface.

FIG. 3 is a front view showing that the circuit module of the embodiment is mounted on the glass plate of the rear window of the automobile. In FIG. 3, one end of the antenna conductor 2 formed of a linear strip having a predetermined pattern provided on the glass surface is used as a feeding point 5 for connecting an antenna cable, and a solderable terminal portion is provided at the feeding point 5. Then, the circuit module 4 of the embodiment is connected to the terminal portion by a method such as soldering. In order to ensure stable mounting of the circuit module of the embodiment, the other end of the module is soldered to the dummy terminal 6 on the glass surface,
At the same time, the terminal serves as a terminal portion for connecting to the receiver. 3 is a defogger conductor.

In FIG. 1, a resonance circuit is provided in the circuit module 4 to improve the receiving sensitivity.

FIG. 4 shows the circuit module 4 of the present invention shown in FIG.
Another usage mode is shown. An anti-resonance circuit was built in the circuit module 4. A solderable terminal portion is provided at one end of the antenna conductor 2 which is formed on the surface of the glass plate 1 and which has a linear pattern and which is closest to the defogger conductor 3, and at one end of the defogger conductor 3 which is closest to the antenna conductor 2. Then, the circuit module 4 is connected to the terminal portion by a method such as soldering.

Reference numeral 14 is a soldering terminal at the end of the antenna conductor 2, and 15 is a soldering terminal at the end of the defogger. In this case, since the circuit module 4 does not have a function of sending a reception signal to the receiver, the connector 2 as shown in FIG.
A protruding portion such as 0 is unnecessary.

[0016]

According to the present invention, by mounting the circuit module of the present invention on the glass surface, the connection from the antenna conductor to the circuit is shortened, so that the mixing of disturbance noise can be prevented.
In addition, the stray capacitance due to wiring is small. In the embodiment as shown in FIG. 3, when external force is applied by a cable or the like, the connector 20 exerts a force immediately on the surface of the glass 1, so that the substrate 9 can be protected and even if the connector 20 is broken. The possibility that the glass plate 1 and the substrate 9 are damaged is small because only the dummy terminal 6 is damaged.

When soldering the circuit module of the present invention onto the glass surface, it is possible to prevent the resin 11 from being damaged by the pressure in the legs by adjusting the thickness of the metal fitting and the length 16 of the metal fitting. .

[Brief description of drawings]

FIG. 1 is a perspective view of a circuit module according to an embodiment.

FIG. 2 is a side view of the circuit module shown in FIG.

3 is a front view showing that the circuit module of FIG. 1 is mounted on a glass plate of a rear window of an automobile.

FIG. 4 is a front view showing another mode of use of the circuit module of the present invention, which is different from FIG.

[Explanation of symbols]

7 metal fittings 8 metal fittings 9 circuit board 10 electronic components

Claims (2)

[Claims] 1. A circuit board, an electronic component mounted on the circuit board, a circuit connected to the circuit board, extending downward from the circuit board, and further extending in the horizontal direction. 1. A circuit module for an automobile glass antenna, which comprises a bent metal plate-shaped or rod-shaped electrode, and the circuit board is resin-molded. 2. An automobile glass antenna in which the circuit module for an automobile glass antenna according to claim 1 is mounted on a conductor pattern on a window glass plate of an automobile.