JPH02198108A - Flyback transformer - Google Patents

Abstract

PURPOSE:To obtain a flyback transformer which is highly workable and has stable quality by using a film capacitor in a high-pressure capacitor and by using a parts holder capable of fixedly holding rectifying parts. CONSTITUTION:A film capacitor is used as a high-pressure capacitor, and the high-pressure capacitor is made in one piece. By using a parts holder having fixing frames 19a to 19d capable of accurately housing a high-pressure diode 20, high-pressure capacitors 21, 22, and a low-voltage rectifying diode 23 at a fixed position, housed parts are put together to be compact, and are assembled with the transformer section. Therefore, if a film capacitor having a dimensional stability is used in the high-pressure capacitor and all parts are formed in an engagement structure, they can be mounted easily. Thus, a flyback transformer which is highly workable and has stable quality can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flywheel transformer for supplying high voltage to a cathode ray tube.

Conventional Technique 7 In fiber transformers, a voltage doubler circuit is generally used as a voltage rectifier for downsizing and power saving. This circuit diagram is shown in FIG.

D1 to D are high voltage diodes, 01 to C3 are high voltage capacitors, and D4 is a low voltage rectifying diode.

The structure of a flyback transformer using this method is shown in the seventh section.
As shown in the figure. FIG. 8 is a top view thereof, and FIG. 9 is a side view thereof. A transformer section in which a core 1 is assembled using a fastening fitting 1o into a pobbin 2 in which a low-voltage coil and a high-voltage coil are wound and diodes for video voltage and focus voltage rectification are attached, a high-voltage diode 7 in a printed circuit board 3, and a high-voltage ceramic capacitor. 8. The rectifying section to which the high voltage lead wire 6 was attached was housed in an insulating case 4 covered with the same shield case 6, and the insulating case 4 was filled with a casting agent 9.

Problems to be Solved by the Invention However, high voltage diodes 7 and high voltage ceramic capacitors 8
In order to accommodate the rectifying section composed of the above on the printed circuit board 3, there is a large variation in the dimensions of the high voltage ceramic capacitor 8, and the printed circuit board 3 cannot be made large from the standpoint of miniaturization, and its position cannot be regulated. In addition, the diode 11 for video voltage and focus voltage rectification is connected to bobbin 2.
This was a major hindrance to increasing productivity, such as installing it in the gap above. It was also difficult to install the high-voltage capacitor C5 for improving image quality shown in FIG. 6 due to the circuit.

The present invention is intended to solve these problems, and is characterized by using a film capacitor as a high-voltage capacitor, and by using a parts holder that can securely hold rectifying parts, it has good workability. The purpose is to provide a flyback transformer with stable quality.

Means for Solving the Problem In order to solve this problem, the present invention uses a film capacitor as the high voltage capacitor, integrates the high voltage capacitor, and connects the high voltage diode, high voltage capacitor, high voltage lead wire, and even low voltage rectifier. By using a parts holder with a fixing frame that can accurately store the diode in a fixed position, the stored parts can be compactly assembled and combined with the transformer part.

Function: With the above configuration, the rectifying section of the flyback transformer can be compactly housed on the parts holder, and assembly work with the transformer section can be easily performed, eliminating the troublesome installation of diodes on the bobbin. This will greatly improve work efficiency and reduce the amount of secondary defects.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a front sectional view of the flyback transformer of the present invention;
FIG. 2, FIG. 3, and FIG. 4 are a plan sectional view, a left side sectional view, and a right side sectional view. FIG. 6 is a detailed sketch of the parts holder of the present invention, and FIG. 6 is a circuit diagram of the flyback transformer.

First, in Figures 1 to 4, 13 is a bobbin around which a low-voltage coil and a high-voltage coil are wound, 12 is a core that is assembled into the bobbin 13, 14 is a fastening fitting that fixes the core 12, and 16 is an insulator that houses these. A case 18 is a casting agent filled in the insulating case 16, 16 is a shield case attached to the outer periphery of the insulating case 16, and 19 is a high-voltage diode D1 to D3, a high-voltage capacitor C4 to C3, and a low voltage capacitor shown in FIG. The parts holder 117 in which the voltage rectifying diode D4 is incorporated is a high voltage lead wire for connecting the rectifier incorporated in the parts holder 19 and the cathode ray tube. 6th
The figure shows a sketch of the parts holder 19 and the parts to be assembled.

191L is a frame portion for fitting and fixing the high voltage diode 2o that integrates high voltage diodes D1 to D, 19b is a frame portion for fitting and fixing the high voltage capacitor 21, and 190 is a frame portion for fitting and fixing the high voltage lead wire 17. 19d is a cylindrical frame portion into which the low voltage diode 23 is fitted and fixed;
915 is a fitting hole for connecting the pin terminal provided in the transformer body and the parts holder 19, and a high voltage capacitor a2. a.

The integrated high-voltage capacitor 22 is attached to the parts holder 1
It is fixed by two elongated holes 19f provided in 9 and a flexible lead attachment part 19g.

Effects of the Invention As described above, according to the present invention, the high-voltage capacitor is a film capacitor with good dimensional stability, and all the parts have a fitting structure, so that it can be easily installed. This has the effect of making it possible to manufacture flyback transformers with stable quality.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the flyback transformer of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a left side view thereof, Fig. 4 is a right side view thereof, and Fig. 6 is a parts holder. Some detailed exploded views, Figure 6 is the electrical circuit diagram of the flyback transformer,
FIG. 7, FIG. 8, and FIG. 9 are a plan view, a front view, and a side view of a conventional flyback transformer. 12...Core, 13...Bobbin, 14
......Tightening metal fittings, 16... mark, insulation case, 16
......Shield case, 17...High voltage lead wire, 18...Pouring agent, 19...Parts holder, 191L...High voltage diode Frame for fixing, 19b... Frame for fixing high voltage capacitor, 190... Frame for fixing high voltage lead wire, 19 (1... Low voltage diode Fixing frame, 196... Fitting hole for bobbin pin terminal, 1
9f. 19g...High voltage capacitor mounting hole, 20...
...High voltage diode, 21...High voltage capacitor C1, 22...High voltage capacitor C2 & C3,
23...Low voltage rectifier diode.

Claims (1)

[Claims] It is equipped with a core and a bobbin wound with a coil housed in an insulating case, and can support and fix a high-voltage rectifier circuit using a film capacitor as a high-voltage capacitor and low-voltage rectifier components using a fixing frame. A flyback transformer consisting of a parts holder.