JPS5818262Y2 - high frequency coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the storage of a tuning capacitor built into a small high frequency coil such as an intermediate frequency transformer or a transducer.

The tuning capacitor built into such a high-frequency coil is generally housed in a recess provided at the bottom of the base of the coil, and its lead wire is tied to a terminal pin and soldered. Since there is a process of attaching them to pins, this is disadvantageous in terms of mass production, and since the size is relatively large, the number that can be stored in the base is limited to about two.

In order to improve these drawbacks, it is desirable to use small, large-capacity chip capacitors as tuning capacitors from the viewpoint of product miniaturization and performance improvement. Since it only has electrodes exposed at both ends and does not have lead wires like normal ones, various ingenuity is required to connect it to the terminal pin of the high-frequency coil.

The present invention allows such chip capacitors to be easily temporarily attached between terminal pins before soldering, thereby improving the mass productivity of capacitor mounting work and stably attaching chip capacitors without lead wires. It is designed so that it can be installed on.

Hereinafter, the present invention will be explained with reference to the drawings.

In the figure, 1 indicates the base of the coil, and 2 indicates the terminal pin embedded in it. However, in the present invention, a part of the terminal pin 2 to which the capacitor is connected is processed by crushing, bending, etc. The chip capacitor 4 is directly sandwiched between the terminal pins by fitting the end of the chip capacitor 4 into the recess of the bump 3, and in this state, the electrode 7 of the chip capacitor and the terminal pin 2 are connected. It is soldered.

The chip capacitor 4 may be stored in the recess 5 provided on the bottom of the base 1 as shown in FIG. 1, or in the recess 5' (provided on the side surface of the base 1 as shown in FIG.
hole or groove).

However, since the chip capacitor is extremely small and thin, it is not necessarily necessary to store it in the recess, and for example, it can be attached directly to the bottom surface of the base 1.

Figures 3 to 5 show examples in which a portion of the terminal pin 2 is bent to form an uneven portion 3, and Figures 6 and 7 are examples in which a portion of the terminal pin 2 is bent to form an uneven portion 3. An example of creating part 3 is shown below.

Furthermore, one of the two terminal pins connecting both ends of the chip capacitor may be a normal terminal pin 2' as shown in FIG.

Even if the terminal pin 2 falls down, the end of the chip capacitor 4 can be easily fitted into the recess of the uneven part 3 of the terminal pin 2 and temporarily attached using the elasticity of the terminal pin 2. The process of temporarily attaching the capacitor can be omitted, and the capacitor mounting process can be carried out in mass production.

Another advantage is that the chip capacitor 4 without lead wires can be stably mounted.

In the figure, 6 represents the solder connecting the terminal pin and the chip capacitor, 8 represents the bobbin, and 9 represents the coil.

[Brief explanation of the drawing]

FIGS. 1 and 2 are front and side views illustrating a high-frequency coil according to the present invention, and FIGS. 3 to 8 are enlarged views of main parts. 1: Base, 2: Terminal pin, 3: Uneven part, 4: Chip capacitor.

Claims (1)

[Scope of utility model registration request] An uneven part 3 is provided on a part of the terminal pin 2 implanted in the base 1 of the coil, and the end of the chip capacitor 4 directly sandwiched between these terminal pins 2 is fitted into the recess of the uneven part 3. A high-frequency coil that is tightly soldered.