JPH0449764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high frequency coil housed in a shield case together with a variable magnetic core and a tuning capacitor.

(Prior art) This type of conventional high-frequency coil is shown in Fig. 1 A, B,
This will be explained using C. Reference numeral 1 denotes a drum-shaped core around which a coil 2 is wound, and is adhesively fixed to the upper surface of a terminal plate 3. Reference numeral 4 denotes a variable magnetic core, which is housed in the shield case 5 together with the drum-shaped core 1 and the terminal plate 3 so as to be movable up and down. 6a, 6b, 6c, 6d, 6e, 6
f is an L-shaped pin terminal on which the terminal board 3 is embedded, and the horizontal portions of the pin terminals 6a, 6b, 6c are exposed in a recess 7 formed on the bottom surface of the terminal board 3. Reference numeral 8 denotes a concave groove provided on the end surface of the terminal plate 3 that contacts the shield case 5, and the lead wire 9 of the coil 2 passes through this concave groove 8 and is wound around the upright portions of the pin terminals 6a to 6f and soldered. ing. 10 is a chip capacitor for tuning, and pin terminals 6a and 6b exposed in the recess 7
It is connected to the.

(Problem to be Solved by the Invention) By the way, in the above conventional structure, the chip capacitor 10 is attached between the pin terminals 6a and 6b or between the pin terminals 6a and 6b.
It is inconvenient in use because it is limited to between 6c and 6c, and the connection position of the chip capacitor 10 cannot be changed arbitrarily to widen the range of applications in terms of circuit configuration.

The present invention aims to eliminate this inconvenience, and is intended to provide a structure in which a chip capacitor can be freely attached between each terminal.

(Means for Solving the Problems) In order to achieve the above object, the high frequency coil of the present invention has a plurality of flat terminals implanted in a terminal board, an upright part inserted into a wiring board, and a terminal. It consists of a horizontal part exposed in a recess formed on the bottom of the plate, and an extension part provided at the tip of the horizontal part of the flat terminal located at both ends, and each of the horizontal part and extension part of the flat terminal is The tips are arranged close to each other such that one or more chip capacitors can be connected between any two of the horizontal portion and the extension portion, respectively.

(Function) According to the above configuration, there are no restrictions on the mounting position and number of chip capacitors for tuning, and it is possible to connect to the horizontal part of any flat terminal, thereby facilitating the design of the wiring board. In addition, since the chip capacitor can be connected through the recess formed on the bottom of the terminal board, it is possible to standardize the terminal board and improve the mass productivity of the terminal board.

(Example) Hereinafter, an example will be described in detail based on the drawings. FIGS. 2A, 2B, and 2C show an embodiment of the present invention. Reference numeral 11 denotes a drum-shaped core around which a coil 12 is wound, which is adhesively fixed to the upper surface of a terminal plate 13. FIG. Reference numeral 14 denotes a variable magnetic core, which is housed in a shield case 15 together with the drum-shaped core 11 and the terminal plate 13. This variable magnetic core 14 is screwed into the inner surface of the shield case 15, and by rotating the variable magnetic core 14, It is designed to move up and down with respect to the drum-shaped core 11. 16, 17, 18, 19, 2
Reference numerals 0 and 21 indicate flat terminals implanted in the bottom of the terminal board 13, which are exposed in upright parts 16a to 21a inserted into a wiring board (not shown) and in a recess 22 formed in the bottom of the terminal board 13. The tips of the horizontal parts 16b, 18b, 19b, and 21b of the flat terminals 16, 18, 19, and 21 located at both ends of the flat terminals 16 to 21 are arranged at right angles. bent extensions 16c, 18c,
19c, 21c, and their extensions 16c,
18c, 19c, 21c and the tips of the horizontal portions 17b, 20b of the other flat terminals are arranged close to each other, and the chip capacitor 23 is connected to the flat terminals 16, 1.
It is connected between the extension parts 16c and 18c of the horizontal part of 8. 24, the terminal board 13 is the shield case 15
The lead wire 25 of the coil 12 passes through this groove 24 and connects to the flat terminal 1.
It is wrapped around the upright portions 16a to 21a of Nos. 6 to 21 and soldered.

FIG. 3 shows the horizontal portion 16b of the flat terminals 16 to 21.
~21b or horizontal extensions 16c, 18c, 1
A state in which chip capacitors 23 are attached to 9c and 21c is shown. A is between the horizontal part 16b of the flat terminal 16 and the horizontal part 17b of the flat terminal 17, B is between the extension part 16c of the flat terminal 16 and the extension part 21c of the flat terminal 21, and C is between the flat terminal 18. extension 18 of
c and the extension part 19c of the flat terminal 19, and between the extension part 16c of the flat terminal 16 and the extension part 2 of the flat terminal 21.
A chip capacitor 23 is connected between each of the capacitors 1c.

FIG. 4 shows a high frequency coil in which a coil bobbin with a plurality of winding grooves and a terminal plate 13 are integrally formed, and it goes without saying that the flat terminal of the present invention can also be applied to this type of high frequency coil.

(Effect of the invention) As described above, the high frequency coil of the present invention has the following effects:
In a structure in which a coil is attached to a terminal board on which multiple flat terminals are embedded and housed in a shield case together with one or more chip capacitors for tuning, the multiple flat terminals are attached to the wiring board. It has an upright part to be inserted, a horizontal part exposed in a recess formed in the terminal board and the bottom, and an extension part provided at the tip of the horizontal part of the flat terminal located at both ends, one or more. Since the chip capacitors are connected to both the horizontal part and the extension part, there are no restrictions on the mounting position and number of chip capacitors for tuning, unlike in conventional high-frequency coils. ,
Since the design of the wiring board is facilitated, it has the effect of achieving the above-mentioned object of the present invention.

Furthermore, since the flat terminal of the present invention can be manufactured simultaneously by punching from a single thick plate,
It also has the advantage of being easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional high-frequency coil, in which A is a vertical sectional view, B is a bottom view, C is a wiring diagram, and FIG. 2 is a diagram showing a high-frequency coil according to an embodiment of the present invention. is a longitudinal sectional view, B is a bottom view, C is a wiring diagram, Fig. 3 is a layout diagram and wiring diagram of the flat terminal and chip capacitor of the present invention, and A, B, and C show different layouts of the chip capacitor. FIG. 4 is a diagram showing different terminal plates and coils in another embodiment of the present invention. 11...Drum-shaped core, 12...Coil, 13
...Terminal board, 14...Variable magnetic core, 15...Shield case, 16-21...Flat terminal, 16a-2
1a...Upright part, 16b-21b...Horizontal part, 1
6c, 18c, 19c, 21c...extension part, 22
... recessed part, 24 ... recessed groove.

Claims (1)

[Claims] 1. A coil is attached to a terminal board on which a plurality of flat terminals are embedded, and the coil is housed in a shield case together with one or more chip capacitors for tuning, and the plurality of flat terminals The terminal has an upright part inserted into the wiring board, a horizontal part exposed in a recess formed in the bottom of the terminal board, and an extension part provided at the tip of the horizontal part of the flat terminal located at both ends. , each tip of the horizontal part and the extension part of the flat terminal is
A high frequency coil arranged close to each other such that one or more chip capacitors can be respectively connected between any two of the horizontal part and the extension part.