JPS60127708A - High-frequency coil - Google Patents

Abstract

PURPOSE:To prevent the generation of fitting backlashes due to micro-oscillation by fitting L-shaped projections at the corners of a sealed case in L-shaped through holes on a terminal plate having a winding part with pressure-contact completely. CONSTITUTION:L-shaped through holes 2a directed to the upper and lower surfaces of a terminal plate 2 is arranged between terminals 6 and the peripheral parts of corners of the terminal plate 2. Next, a winding part composed of a drum core 1 on which a coil 3 is wound is stuck and fixed to the terminal plate 2. The terminal plate 2 comprising the winding part thus composed is provided with L-shaped projections 4a which are inserted and fitted to the through holes 2a on the lower end of a sealed case 4 supported by a cap core 5 engaged spirally inside thereof. The projection 4a has the size 4b slightly larger than a length 2b of the through hole 2a and the projections are fitted with pressure contact and are fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high frequency coil used in consumer machines such as televisions, videos, and radio-cassette players.

Conventional configuration and problems thereof Conventional high-frequency coils of this type have been configured as shown in FIGS. 1 and 2. That is, a drum core 1 having a winding portion and a terminal plate 2 are adhesively fixed, a coil 3 is wound around this drum core 1, a cap core 6 is fitted into a shield case 4, and a cap core 6 is assembled. The shield case 4 fitted with the drum core 1 was fitted onto the terminal plate 2 having the drum core 1. In this case, drum core 1
The fixing of the terminal plate 2 with the shield case 4 on the outer periphery is as follows:
A recess 2a on the side surface of the terminal board 2 and a dowel 4 of the shield case 4.
b, and due to variations in the shape and size of the dowel 4b and the protrusions protruding from the inner surface of the shield case 4, when slight vibration is applied, the recess 2a of the terminal plate 2 and the dowel of the shield case 4 may 4b is in point contact, causing fitting play, and the clearance between the camp core 5 and the drum core 1, which are magnetically configured, changes, resulting in a frequency shift in terms of electrical performance. As a result of this countermeasure, conventional fitting methods cannot be said to have good looseness.

OBJECT OF THE INVENTION The present invention eliminates such conventional drawbacks, and is intended to prevent mating rattling due to minute vibrations of the shield case holding the terminal plate having the winding portion and the cap core, and to improve the mating work. The purpose is to improve the workability of the machine.

Structure of the Invention In order to achieve this object, the present invention provides an L-shaped through hole in the outer periphery of a terminal plate having a winding portion, facing toward the upper and lower flat portions, and in this through hole. An L-shaped protrusion protruding from the lower corner of the shield case holding the cap core is press-fitted.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In FIGS. 3 to 6, the same parts as in FIGS. 1 and 2 are designated by the same numbers. Figure 3~
In FIG. 5, the outer periphery of each corner of the terminal plate 2 and the terminal 6
An L-shaped through hole 2a is provided between the two faces and the bottom face of the terminal plate 2.

Next, a winding portion made of the drum core 1 around which the coil 3 is wound is adhesively fixed to the terminal plate 2. The winding portion configured as described above is inserted into the through hole 2a of the terminal plate 2 and inserted into the lower end of the shield case 4 holding the cap core 6 screwed inside the terminal plate 2. An L-shaped protrusion 4a is provided at each corner. The protruding piece 4a has a dimension 4b that is slightly larger than the length 2b of the L-shaped through hole 2a of the terminal plate 2, and the high-frequency coil is fixed by press-fitting the protruding piece 4N. It is. Note that there is a concave groove 2 on the side surface of the terminal board 2 into which the grounding piece 4C of the shield case 4 is fitted.
C is formed.

Effects of the Invention As described above, according to the high frequency coil of the present invention, the terminal plate having the winding portion and the shield case are arranged so that the L-shaped protrusion at the corner of the shield case is connected to the L-shaped protrusion of the terminal plate. Since it is completely press-fitted into the through hole, it is possible to eliminate looseness in the fitting due to micro vibrations.

[Brief explanation of the drawing]

1 is a sectional view showing a conventional high frequency coil, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of a high frequency coil according to an embodiment of the present invention, FIG. 4 is a sectional view of the same, and FIG. The figure is an exploded perspective view. 1...Drum core, 2-...Terminal board, 2a.
・-Through hole, 3- Coil, 4・ Shield case, 4
a Projection piece, 5 - cap core, 6... terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure"" ,

Claims (1)

[Claims] An L-shaped through hole was provided on the outer periphery of the terminal plate having the winding portion toward the upper and lower flat surfaces, and a through hole protruded into the lower part of the corner of the shield case holding the cap core. A high-frequency coil made by press-fitting L-shaped protrusions.