JPS62213215A - Flyback transformer - Google Patents

Abstract

PURPOSE:To realize engagement at the position determined in the stage of design and makes easy improvement of workability and access to the automatic assembling by providing a stepped portion to the projected part at the engaging region. CONSTITUTION:A projected part 7 having the stepped part for engagement is provided to the internal wall of high voltage bobbin 6. In the same way, a projected part 9 is provided to the external wall of low voltage bobbin 8 for the engagement with the projected part 7 of high voltage bobbin 5 considering the core engaging part 10. As a result, engagement can be realized without considering the inserting position and these are further provided with the UU type ferrite core in order to form a flyback transformer. Moreover, in case the stepped part is provided to the projected parts 7, 9 for engagement, restriction in the rotating direction is only required and in case the stepped portions of projected parts 7, 9 for engagement are provided alternately, restriction in the rotating direction can also be eliminated. Provision of two stepped portions doubles the degree of freedom and results in the expectation for the similar effect.

Description

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

BACKGROUND ART In a conventional flyback transformer, the fitting of a high-voltage coil and a low-voltage coil is shown in FIG. 6, as shown in Utility Model Registration No. 1307170.

The construction was as shown in Figure 7. That is, the high pressure bobbin 1 and the low pressure bobbin 3 are provided at a constant height.
The fitting protrusion 2 of the low pressure bobbin 3 and the fitting protrusion 4 of the low pressure bobbin 3 are used for fitting and fixing.

Problems to be Solved by the Invention However, with such a structure, there is a restriction on the position of the core insertion part 6 provided in the low voltage bobbin 3 and the fitting part of the high voltage coil 1. The position of insertion into the bobbin 1 is naturally restricted, requiring caution during assembly, and hindering automatic assembly.

Means for Solving the Problems Accordingly, the means of the present invention for solving the above-mentioned problems is to provide steps on the fitting protrusion, and these steps may be all or alternate.

Effect The effect of this means is as follows. That is, by providing a step in the fitting portion, the fitting position of each fitting protrusion is regulated, which not only improves work efficiency but also facilitates automation.

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

In FIGS. 1 and 2, a fitting protrusion 7 with a step is provided on the inner wall of the high-pressure bobbin 6. Similarly, low pressure bobbin 8
The core fitting part 1o is taken into consideration on the outer wall of the high pressure bobbin θ.
A fitting protrusion 9 is provided so as to be combined with the fitting protrusion 7 .

As a result, they can be fitted without worrying about the insertion position. A UU type ferrite core is incorporated into these to form a flyback transformer.

In the embodiment shown in FIG. 3, the steps of the fitting protrusions 7.9 are provided on all sides, so it is only necessary to regulate the direction of rotation after insertion, and the steps of the fitting protrusions 7.9 are provided alternately. If you use the shape shown in Figure 4, you can work without worrying about the direction of rotation. Although there is a two-step difference in Figure 4, the degree of freedom is twice that of the current system, and similar effects can be expected.

Further, in FIG. 5, the fitting protrusion 7 of the high-pressure bobbin 6 is provided with a recess 12 into which the protrusion 11 at the tip of the fitting protrusion 9 of the low-pressure bobbin 8 is fitted, thereby enabling positioning and fitting.

Effects of the Invention According to the present invention, by providing a step on the protrusion of the fitting portion, fitting can be performed only at a position determined at the time of design, and work efficiency can be improved and efforts toward automation can be facilitated.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main parts of an embodiment of the flyback transformer of the present invention, Fig. 2 is a sectional view when mated, and Figs. 3 to 6 are the shapes of the fitting protrusions and their positional relationships. A plan development view of
FIG. 6 is a sketch of a conventional flyback transformer, and FIG. 7 is a side view of the conventional flyback transformer when fitted. 6... High pressure bobbin, 7... Fitting protrusion, 8... Low pressure bobbin, 9... Fitting protrusion, 1o... Core Fitting portion.

Claims (1)

[Claims] It has a low-voltage bobbin around which a low-voltage coil is wound, and a high-voltage bobbin around which a high-voltage coil is wound, and a ferrite core is incorporated into the low-voltage coil and the high-voltage coil, and the outer circumference of the low-voltage bobbin and the inner circumference of the high-voltage bobbin are formed. A flyback transformer characterized in that each has a mating protrusion with a step.