JPS6266610A - High frequency coil - Google Patents

Abstract

PURPOSE:To improve the quality of a high frequency coil by forming a drum core holding hole in a terminal board, press-fitting the core to associate the core without an adhesive, thereby stabilizing the associating position and strength. CONSTITUTION:A plurality of terminal pins 9 are inserted to the lower surfaces of a terminal board 8 made of synthetic resin, and a drum core holder 12 for coating the periphery and the upper surface of a lower collar 11 of a drum core 10 is provided on the upper surface of the board 8. A cylindrical portion 15 and a ceiling 16 are formed in the holder 12, and a cutout 17 to which the collar 11 of the core 11 is press-fitted is formed in a part of the portion 15. Slits 18 to which the winding core 13 of the core 10 is inserted are formed from the peripheral edge toward the center on the ceiling 16. The collar 11 is press-fitted by utilizing the elasticity of the holder 12 from the cutout 17 at the side of the holder 12, and a coil 14 is wound on the outer periphery of the winding core 13 of the core 10 to improve the quality of a high frequency coil.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high frequency coil used in audio circuits and power supply peripheral circuits of video and audio equipment and various communication equipment.

Conventional Conventional Conventional High Frequency Coil As shown in FIG. 4, the upper surface of the terminal plate 2 in which the terminal pin 1 is implanted is provided with a recess 5 in which the lower end flange 4 of the drum core 3 is fitted. adhesive 6
The drum core 3 was fixed through the drum core 3, and the coil 7 was wound around the drum core 3.

Problems to be Solved and Attempted by the Invention With the above configuration, the drum core 3 may be installed at an angle or off-center due to the applicator of the adhesive 8 or work irregularities, or the adhesive may come off. ,
Characteristics 1: There were many problems in terms of quality.

Therefore, the present invention eliminates the above-mentioned conventional drawbacks, and allows a drum core to be assembled without using adhesive.
The aim is to provide a high-quality high-frequency coil with stable installation position and stable strength.

Means to Solve All Problems In order to achieve the above object, the high frequency coil of the present invention has the following features:
A drum core holding hole is provided in the terminal plate, and the drum core is press-fitted and fixed therein.

Function: With the above-described configuration, the drum core can be easily and reliably assembled into the terminal board.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 8 denotes a terminal plate molded from synthetic resin, and a plurality of terminal pins 9 are planted on the lower surface of the terminal plate 8.

Further, on the upper surface of this terminal plate 8, a lower end flange 1 of the drum core 10 is provided.
A drum core holding portion 12 is provided to cover the circumferential surface and top surface of the drum core 1. This drum core holding part 12 has a cylindrical part 15 and a ceiling surface 16, and a part of the cylindrical part 15 has a drum core 1o.
A notch 17 is provided so that 11 ft of the lower end flange can be press-fitted, and a slit 18 is provided in the ceiling surface 16 from the periphery to the center through which the winding core 13 of the drum core 10 is inserted. The lower end flange 11 of the drum core 10 is press-fitted and fixed through the side notch 17 of the drum core holder 12 by utilizing the elasticity of the drum core holder 12. A coil 14 is wound around the outer periphery of the winding core 13 of the drum core 10.

With the above configuration, the assembly is performed by press-fitting the lower end flange 11 of the drum core 10 through the notch 17 of the cylindrical portion 15 of the drum core holding portion 12 of the terminal plate 8. At this time, the lower end flange 11
Although the opening size of the notch 17 is smaller than the diameter of the drum core holder 12, the lower end flange 11 is press-fitted to spread the notch 17 due to the elasticity of the drum core holding part 12, and when it is completely housed in the cylindrical part 16, it becomes self-elastic. As a result, the notch 17 returns to its initial state, and the drum core 1o is coupled to the terminal plate 8 by elastic retention. Note that the winding core 13 of the drum core 1o passes through the slit 18 of the ceiling surface 16 and is located at the center of the ceiling surface 16. In this state, the winding core 13 of the drum core 10 is wound to form the coil 14. .

Since the terminal plate 8 and the drum core 1o are press-fitted together in this way, no connecting agent is required, and the drum core 10 can always be correctly assembled into the terminal plate 8.

Effects of the Invention As described above, the high-frequency coil of the present invention is configured so that the drum core can be assembled into the terminal board without using adhesive, and its installation is determined by the drum core holding part provided on the terminal board, preventing inclination or center deviation. Assembling work can be easily and reliably performed without causing any problems, and productivity can be improved, and quality can be significantly stabilized.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the high frequency coil of the present invention, Fig. 2 is a front view of the same terminal plate, Fig. 3 is an exploded perspective view of the same terminal plate and drum core, and Fig. 4 is a conventional high frequency coil. It is a sectional view of a coil. 8...Terminal board, 9...Terminal bin, 10
...Drum core, 11... Lower end flange of drum core, 12... Drum core holding part, 13.
...Winding center of drum core, 14...Coil, 16...Cylindrical part, 16...Ceiling surface, 17...Notch part, 18...Slit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A drum core holding part that covers the circumferential surface and top surface of the lower end flange of the drum core is provided on the terminal board in which the terminal pins are implanted, the drum core is press-fitted into this drum core holding part, and a coil is wound around this drum core. coil.