JPH06342726A - Coil bobbin for high voltage transformer - Google Patents

Abstract

PURPOSE:To obtain a coil bobbin for a small-sized high voltage transformer of high reliability wherein a coil generating a high voltage and a low voltage side coil are surely insulated, and a high output voltage can be obtained. CONSTITUTION:A base side coil cylinder 7 and a diaphragm 10 formed on a base 16 are engaged with an upper frange side coil cylinder 8 formed on an upper flange 9 and are fusion bonded. A high voltage side coil is wound around the base side coil cylinder 7. The high voltage side and the low voltage side are insulated by a diaphragm 10. A low voltage side coil is formed around the diaphragm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil bobbin for a high voltage transformer in a power supply device for lighting a cold cathode tube or the like.

[0002]

2. Description of the Related Art Conventionally, in this type of transformer, since the voltage generated in the secondary winding is a high voltage of 1000 to 2000 Vrms, a plurality of windings are wound around the winding cylinder as shown in FIG. The partition plate 5 was attached, and the winding was divided into windings so that the wire rods at the beginning and end of winding did not come close to each other.

As the cathode tube becomes shallower, the transformer is required to have a lower profile. Narrow the secondary reel 3 to make it low profile and take thousands of turns to obtain high pressure,
A structure is obtained in which the winding start position and the winding end position are spaced apart from each other, and the pressure resistance is obtained by coating the wire material without using the plurality of flanges. At that time, for the insulation from the primary side, a thin insulating tape or a thread having an insulating property was wound because the winding frame was narrow, but the workability was poor and the insulating property was low and the reliability was poor. There was also a drawback.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in a coil bobbin for obtaining a high-voltage transformer which is compact and which can obtain a high-voltage output voltage and which is highly reliable, a coil bobbin for generating a high voltage and a low-voltage side coil are provided. It is a technical subject to have a structure that can reliably insulate the winding.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a winding tube is provided in which terminals for high voltage and low voltage are mounted on both sides of a pedestal and a magnetic leg of a magnetic core is inserted in the center of the pedestal to wind a winding. Is mounted vertically on the surface of the pedestal, and a partition plate is also mounted vertically on the surface of the pedestal so that the reel can be housed in the reel of the pedestal. With the vertical coil bobbin formed, insert the magnetic leg of the magnetic core in the center of the pedestal,
A winding tube to be assembled, a partition plate for separating the primary side and the secondary side from the outer circumference of the winding tube, and a lead wire drawing groove for drawing out a lead wire are installed from the root of the winding tube to the high voltage side (secondary side) terminal portion, The upper collar side winding tube that enters the inside of the pedestal side winding tube has a structure in which the upper collar is integrally molded, and a jig of a length that does not cover the partition plate is installed on the pedestal winding tube and self-fusing After applying the secondary winding from the clearance of the jig using a wire, etc., fit the upper collar and the pedestal, and bond the partition that is in contact with the upper collar with ultrasonic waves or solvent. Then, the primary winding is provided on the partition plate to form a coil bobbin for high voltage.

[0006]

The coil bobbin of the present invention is composed of two parts, an upper collar and a pedestal, and an upper collar side winding cylinder (inner winding cylinder) is provided on this upper collar.
On the other hand, on the other hand, the pedestal is provided with a pedestal-side winding cylinder and a partition plate, and this pedestal-side winding cylinder has an upper flange-side winding cylinder (inner winding cylinder).
Is inserted and the upper collar and the pedestal are integrated. The secondary winding is wound around the pedestal-side winding tube, and the primary winding is wound across the partition plate to reliably insulate the high-voltage side and low-voltage side. The coil bobbin for a small vertical transformer having a pressure resistance characteristic.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a coil bobbin for a high voltage transformer according to the present invention. FIG. 1A is a perspective view of an exploded appearance, and FIG. 1B is a perspective view showing a state of being integrally assembled. FIG. 2 is a cross-sectional view of the coil bobbin shown in FIG. 1 taken along the line AA, illustrating a process for assembling the bobbin for the high-voltage transformer. FIG. 2A shows a secondary winding using a jig. Fig. 2 (b) shows the assembled upper collar, and Fig. 2 (c) shows the assembled state. As shown in FIG. 1A, the coil bobbin according to the present invention shown in FIG. 1 is composed of two parts, an upper collar 9 and a pedestal 16, and a through hole for inserting a magnetic leg of a magnetic core is provided at the center. , A first coil (secondary coil) having a size substantially equal to the outer circumference thereof
The upper flange-side winding tube 8 around which is wound is integrally formed of an insulating material of the same quality as the upper flange 9.

The pedestal 16 has a primary side and a secondary side on the outer circumference of the winding cylinder.
A cylindrical partition plate 10 that electrically insulates the secondary side is provided and extends from the center to the secondary side terminal, and the lead wire lead-out groove 1
1 is provided, and the secondary side terminals 13a are provided at opposite ends of the outer circumference.
And the primary side terminal 13b is arranged. In the embodiments of the present invention, the shapes of the winding cylinder, the partition plate, and the brim have been shown as circles, but it goes without saying that the present invention can be implemented even if the shapes are quadrangular or elliptical.

[0010]

EFFECT OF THE INVENTION A coil bobbin obtained by fitting and welding a winding cylinder provided on a pedestal, a partition plate, and a winding cylinder provided on an upper collar, in which a high voltage side winding is wound around the winding cylinder. A coil bobbin characterized by insulating the voltage side and the low voltage side with a partition plate, and winding the low voltage side around the partition plate. By using the coil bobbin according to the present invention, the coil bobbin is small in size and has high electrical insulation voltage. A vertical type high voltage transformer having characteristics has come to be obtained.

[Brief description of drawings]

1 is a perspective view of a transformer using a bobbin according to the present invention, FIG. 1 (a) is an exploded perspective view of a transformer using the bobbin of the present invention, and FIG. 1 (b) is a bobbin of the present invention. It is an external appearance perspective view of a transformer.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.
Next side winding process drawing, (b) is a cross-sectional view showing the upper flange fitting,
(C) is a cross-sectional view showing a completed state.

FIG. 3 is an external perspective view of a conventional coil bobbin.

[Explanation of symbols]

 1 Terminal 2 Bobbin 3 Secondary Side Winding Frame 4 Primary Side Winding Frame 5 Partition Plate 6 Magnetic Core 7 Base Side Winding Tube 8 Upper Collar Side Winding Tube (Inner Winding Tube) 9 Upper Flange 10 Partition Plate 11 Lead Wire Drawer Groove 12 Secondary side winding (high voltage side winding) 13a terminal (secondary side) 13b terminal (primary side) 14 Winding jig 15 Primary side winding (low voltage side winding) 16 pedestal

Claims (1)

[Claims] 1. A winding cylinder in which terminals are planted at both ends and a magnetic leg of a magnetic core is incorporated in the center and a winding is wound around the outer periphery of the magnetic leg, and a primary side and a secondary side are provided outside the winding cylinder. A pedestal having an insulating partition plate and a lead wire drawing groove provided in the terminal direction on the high voltage side from the winding tube, and an upper collar having an inner winding tube in which a magnetic leg of a magnetic core is incorporated in the center, A coil bobbin for a high-voltage transformer, characterized in that the inner bobbin provided on the upper collar is fitted and assembled in a bobbin provided on a pedestal.