JPH0132393Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a terminal structure of a shield case, and particularly to a terminal structure in which a terminal for adjusting and inspecting a conductive pattern for leading out inside the case is added.

Conventional technology In high-frequency electronic equipment such as high-frequency tuners,
A metal shield case consists of a frame base and a shield cover, and the frame base is usually made by bending metal members. In this case, a large number of lead-out pins are implanted to provide a group of lead-out terminals on the side wall surface of one side of the frame base. However, for miniaturization, a terminal structure using a conductive pattern on a printed circuit board instead of the lead-out pin has been proposed. For example, one side wall surface of the shield case is sometimes made into a printed circuit board (Utility Model Application No. 59-74792). Here, the printed circuit board has lead-out terminals formed from conductive patterns inside the case, and board legs are attached to the printed circuit board, and the printed circuit board is mounted on another main printed board.

Problems that the invention aims to solve However, in electronic equipment with a shield case structure in which the lead-out pattern formed on the inner surface of the printed circuit board serves as a terminal, it is difficult to determine the terminal position during the equipment adjustment and inspection process prior to mounting on the main printed circuit board. Unfortunately, it is difficult to detect, resulting in decreased work efficiency and measurement errors. For example, the high frequency tuner shown in FIG. 4 and FIG. It is formed by fitting shield covers 5 and 6. In order to lead out the wiring body 2, a conductive land 7 is formed on the inner surface of the double-sided printed circuit board 4, and is extended on the inner surface of the leg part 8 of the printed circuit board to be used as a lead-out terminal. However, when testing or adjusting the characteristics of the tuner circuit in such a case, the signal supplied from the lead-out terminal is connected to the probe or jig pin of the adjustment device of the measuring instrument from the inner surface of the leg 8 of the printed circuit board 4. This will be done by making contact. That is,
Adjustment and inspection signals must be supplied from the side shown by arrow A in FIG. 3, and therefore troubles due to contact errors of the probe and jig pins are likely to occur during the tuner adjustment and inspection process. In addition, the narrow space on the back side can also cause problems in terms of work.

Therefore, the present invention has been proposed in view of the above, and aims to provide a new and improved printed circuit board terminal structure that facilitates adjustment and inspection in the manufacturing process of high frequency equipment. Preferably, one side wall of the shield case frame base is made of a double-sided printed circuit board and a conductive pattern is formed on the inner surface to form a terminal board, in which a detection terminal is attached to the outer surface of the printed circuit board. This is what we propose.

Means for Solving the Problems According to the present invention, a double-sided printed circuit board is used on at least one side surface of a frame base for a shield case of high frequency equipment, and a conductive pattern for a terminal is formed on the inner surface side. The printed circuit board has a ground land for shielding formed on the outer surface, and a detection island is provided on the outer surface corresponding to the conductive pattern on the inner surface, and the conductor interposed in the through hole of the printed circuit board connects the conductive pattern for the inner surface and the outer surface. This is a terminal structure for high frequency equipment, characterized in that it is electrically coupled to a side detection island. That is, in a terminal structure of a shield case in which a double-sided printed circuit board with a ground land on the outside surface and a conductive pattern for the terminal formed on the inside surface is used as a terminal as one side wall of the frame base, the conductive pattern for the terminal and the conductive pattern for the terminal are formed in the ground land on the outside surface. Discloses that an electrically connected independent island is provided and used as a detection terminal.

Function The independent island provided on the outer surface of the printed circuit board is directly connected to the lead-out conductive pattern, so it serves as a detection terminal during adjustment and inspection. It is very suitable for the position and makes the work easier.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show a terminal structure for high-frequency equipment according to the present invention, in which a wiring body 11 of a high-frequency tuner circuit is housed in a shield case 15 consisting of a frame base 12 and frame covers 13 and 14, and a high-frequency Configure the equipment. frame base 12
The side wall on one side consists of a double-sided printed circuit board 16,
On the outer surface, a ground land 17 and detection terminals of a number of independent islands 18 insulated from the earth land 17 are formed. A large number of terminal leg portions 19 are attached to the printed circuit board 16, and a lead-out conductive pattern 20 formed on the inner surface thereof constitutes an input/output terminal for signals of the wiring body 12.

Here, the detection terminal, which is a feature of the present invention, is formed by an island 18 independent of the earth land 17 on the outer surface, and this detection terminal is electrically coupled to the lead-out conductive pattern 20 on the inner surface of the printed circuit board 16. . That is, the conductive patterns 20 on the inner and outer surfaces are electrically connected by a conductor 22 such as solder interposed in the through hole 21 of the printed circuit board 16,
Configure the detection terminal. Such an island 18 on the outer surface side can be used with a probe or jig pin from outside the shield case as shown by arrow B, and it is possible to obtain accurate, reliable, and work-effective contact. This will improve the work efficiency of adjustment and inspection.

Effects of the idea: An independent island is provided on the outside of the conductive pattern for leading out from the inside of the double-sided printed circuit board, insulated from the ground pattern, and the two are electrically connected by a conductor interposed in a through hole that penetrates the printed circuit board. Therefore, each terminal of the lead-out terminal can be detected very easily by using the island on the outer surface side as a detection terminal. In particular, it guarantees ease and accuracy in operation, which helps improve work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main parts of a high-frequency device using the terminal structure according to the present invention, Fig. 2 is a side view of the printed circuit board side of Fig. 1, and Fig. 3 is an enlarged view of the main parts of Fig. 1. , FIG. 4 is a sectional view of the conventional device, and FIG. 5 is a perspective view of FIG. 4. 11... Wiring body, 12... Frame base, 1
5...Shield case, 16...Double-sided printed board, 17...Earth land, 18...Detection terminal (island), 19...Legs, 20...Leading land, 23...Detection land.

Claims (1)

[Scope of utility model registration request] In a high-frequency device consisting of a frame base that houses a predetermined printed wiring body and a shield cover that covers the opening thereof, the frame base has one side wall that has a conductive pattern for leading out on the inner surface and a conductive ground land and an island on the outer surface. It is composed of a double-sided printed circuit board on which a land is formed, and the printed circuit board has a through hole through which a conductor is inserted to electrically connect the conductive pattern and the island, and the island is used as a detection terminal. Terminal structure for high frequency equipment.