JPH0787287B2 - Manufacturing method of in-vehicle speaker integrated antenna - Google Patents

Description

The present invention relates to a method for manufacturing a one-body type antenna, and more particularly to a method for manufacturing a vehicle-mounted antenna which is mounted on an automobile and used for radio broadcasting, television broadcasting, car telephone and the like. Regarding

[Conventional technology]

In a typical prior art, a vehicle-mounted antenna is provided with a long rod-shaped antenna near the roof of a metal body of an automobile or in the vicinity of a rear trunk in order to receive radio broadcasts and to transmit and receive radio waves and car telephones. Was there.

[Problems to be solved by the invention]

Therefore, the antenna protrudes from the vehicle body, and the appearance is deteriorated, and wind noise is generated during traveling. Further, there is a problem that the installation work is troublesome, and when the waterproof structure is deteriorated, rainwater may enter the vehicle compartment along the power supply line during rain.

In other prior art, the antenna is formed by embedding it in the rear glass, so that the rear visibility is deteriorated, and the antenna must be formed for each type of rear glass when the type of vehicle is different. There was a point.

Moreover, recently, in addition to the reception of radio broadcasts, in addition to the transmission and reception of radio and car phones, but also the reception of TV broadcasts, the number of types of antennas that should be installed in one car has increased, and antennas for new applications There is also the problem that there is no extra space for installing the.

Therefore, in order to solve the above-mentioned problems, the present applicant does not impair aesthetics or rearward visibility, and does not require a special space for the antenna, and installs it by a simple operation. As an on-vehicle antenna designed to be able to do so, provide an antenna element on a member raised above the installation location in the vicinity of a window in the vehicle interior of a metal vehicle body or at a desired location in the vehicle interior of a vehicle body made of an insulating material. We have proposed an in-vehicle antenna featuring
No. 3,485). An example of such an antenna is a television broadcast receiving antenna attached to a speaker box for sound reproduction arranged on a rear tray near a rear glass in a vehicle compartment.

However, since a suitable place for mounting such an on-vehicle antenna is a place made of a plastic member and often includes a curved surface, it is not possible to firmly and beautifully mount the antenna element made of a conductor thereon. It's not always easy.

[Means for solving problems]

A method of manufacturing an in-vehicle speaker integrated antenna in which an in-vehicle speaker arranged on a rear tray of an automobile and an antenna are integrated, wherein a speaker box of the in-vehicle speaker is made of a plastic member, After carrying out conductor plating, a mask is applied to the antenna figure part including the curved surface of the conductor plating layer applied to the speaker box, and the conductor plating layer other than the mask part is selectively removed. The method is for manufacturing a speaker-integrated antenna.

In the antenna of the present invention, by integrating the vehicle-mounted antenna with the speaker, the problems of the conventional long rod-shaped antenna protruding from the vehicle body and the antenna embedded in the rear glass are solved, and the aesthetics and the rear view are not impaired. The effect that the antenna can be mounted by a simple work without requiring a special space for the antenna.

The plastic member is produced by the conventional molding method.
The material of the plastic is preferably a material on which plating can be applied, but such a plastic is known as acrylonitrile butadiene styrene (ABS) resin, ABS / polycarbonate resin and the like, and is put on the market. If the plastic can be plated, conductor plating can be applied by a so-called plastic plating method. However, even non-plating plastics can be plated by applying a conductive paint or a paint that can be plated on the surface.

Plastic plating is usually degreasing, cleaning, etching,
Neutralization, catalyst addition, activation, electroless plating, and if necessary, electrolytic plating are performed.

The plating layer may be a conductor, but copper plating is preferable from the viewpoint of low electric resistance and economy.

After conducting the conductor plating on the plastic member, the antenna figure portion is masked. For this mask, for example, knit-vinyl tape No. 21 may be attached to the antenna graphic portion.
Alternatively, if a masked plastic member is brushed with an acrylic modified two-component paint and immersed in a plating stripping solution, the plating layer other than the mask portion, that is, the antenna figure portion is removed. A conductor plating layer is obtained.

After that, it is washed and dried, and if necessary, clear coating or anticorrosion treatment is applied.

[Work]

By providing an in-vehicle speaker integrated antenna and performing a special plating treatment, a durable antenna can be formed beautifully and easily on a plastic surface including a curved surface.

〔Example〕

In the following embodiments, a television broadcast receiving antenna is formed in a sound reproducing speaker box arranged on the rear tray near the rear window. The antenna was formed only on the top cover of the speaker box. Figure 1 (a)
(A) and (c) are the upper cover 11 with this antenna 12, respectively.
A plan view, a front view, a side view, and FIG. 2 are developed views of only the antenna 12. The maximum size of the speaker box top cover is 300mm x 230mm x 60mm, while the antenna lengths are 570mm, 250mm, 125mm and 215mm respectively.

Plating type ABS resin (Denka A manufactured by Denki Kagaku Kogyo)
The upper cover 11 was manufactured by injection molding with BS CME). The upper cover was plated with plastic as follows.

First, cover the top cover with sodium borate 20g /, sodium phosphate
40 ~ 6 using a cleaning solution consisting of 20g /, surfactant 2g /
Degrease and wash at 0 ° C for 3-5 minutes. After washing with water, chromic acid 400
Etching is performed at 65 to 70 ° C. for 5 to 15 minutes using an etchant of g /, sulfuric acid 400 g /, and washed with water. Concentrated hydrochloric acid (50 ml /
), And after washing with water, a solution of 0.2 g of palladium chloride, 5 to 20 g of stannous chloride and 100 to 200 ml of hydrochloric acid is added to the solution.
Immerse for about 5 minutes to attach a catalyst to the antenna graphic portion, and wash with water. After activation with sulfuric acid (80-150g /, 30-50 ° C),
Electroless nickel plating is performed under the following conditions.

Bath composition: Nickel sulfate 30g / Sodium hypophosphite 20g / Ammonium citrate 50g / pH 8 to 9.5 Bath temperature 30 to 40 ° C Time 5 to 10 minutes After washing with water, electroless copper plating is performed under the following conditions 20μ
m copper plating layer is created.

Bath composition: Copper sulfate 15g / Ethylenediaminetetraacetic acid 45g / P-formaldehyde 15g / Sodium hydroxide pH12.5 Dipyridyl 10mg / Nickel potassium cyanide 15mg / Bath temperature 60 ℃ 36 after masking with knit vinyl tape No. 21
20% in 500 ml of 50% hydrochloric acid, 500 ml of water and 50 ml of 30% hydrogen peroxide
It was immersed at 15 ° C for 15 to 30 minutes to remove the plating other than the mask portion. Then, after washing with water and drying, clear coating was performed.

〔The invention's effect〕

According to the present invention, by adopting the special plating method, a durable antenna figure conductor layer can be beautifully formed on a plastic surface including a three-dimensional curved surface, and as a result, aesthetics and rear view are not impaired. Therefore, it becomes possible to industrially manufacture an in-vehicle speaker integrated antenna that does not require a special space for the antenna.

[Brief description of drawings]

FIG. 1 is a three-sided view showing an upper cover of a speaker box in which a television antenna is formed in the embodiment, and FIG. 2 is a development view of the television antenna. 11 …… Speaker box top cover, 12 …… antenna part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-23603 (JP, A) JP 61-183950 (JP, A) JP 61-12881 (JP, A) JP 58- 92291 (JP, A) Actual opening Sho 53-147707 (JP, U) Actual opening Sho 60-163809 (JP, U) Actual opening Sho 61-62412 (JP, U)

Claims (1)

[Claims] 1. A method of manufacturing an in-vehicle speaker integrated antenna in which an in-vehicle speaker arranged on a rear tray of an automobile and an antenna are integrated, wherein a speaker box of the in-vehicle speaker is made of a plastic member. After conducting the conductor plating on the speaker box, mask the antenna figure portion including the curved surface of the conductor plating layer applied on the speaker box, and selectively remove the conductor plating layer other than the mask portion. A method for manufacturing an in-vehicle speaker integrated antenna, which is a feature.