KR19980011423U - Low Pressure Bobbin for Flyback Transformer - Google Patents

Abstract

In order to provide a low pressure bobbin for a flyback transformer for securing the assembled state of the core insertion hole of the low pressure bobbin of the flyback transformer and the core installed over the exterior of the molding case, the core insertion hole (4) of the conventional low pressure bobbin (2) The core stopper 14 is integrally protruded from the base surface of the core holder 8 formed at one end of the core holder 8 at the same height as the gap generated by the difference in the dimensions of the core 6 and the core insertion hole 4. When the edge of one core 6 is chamfered, the core stopper 12 is formed to correspond to the outer circumference of the core 6 so that the core 6 is in the axial direction of the low pressure bobbin 2. It does not move the position to.

Description

Low pressure bobbin for flyback transformer.

The present invention relates to a low pressure bobbin of a flyback transformer, and more particularly, to a low pressure bobbin for a flyback transformer for firmly supporting a core insertion hole of a low pressure bobbin configured in a flyback transformer and a core mounted over an outer circumference of a molding case. It is about.

Flyback transformer is a device that generates high pressure by using pulses generated during the return period of horizontal deflection output in cathode ray tube, and its configuration is filled and sealed with epoxy resin by overlapping high pressure bobbin and low pressure bobbin inside the housing. In order to suppress power loss due to magnetization caused by the high pressure bobbin and the low pressure bobbin, which are overlapped as described above, a pair of cores are inserted from the core insertion hole of the low pressure bobbin over the outside of the molding case. In addition, a focus pack that can variably adjust the voltage required to adjust the screen focus of the cathode ray tube is arranged on one side of the housing of the flyback transformer.

5 is an exploded perspective view of a flyback transformer showing a conventional core support structure.

A core insertion hole 4 is integrally formed at the inner circumference of the low pressure bobbin 2 constituting the flyback transformer, and at one end of the core insertion hole 4 as the core insertion hole 4. The core holder 8 for preventing the left and right flow of the core 6 to be inserted is integrally formed.

The core 6 is formed in a 'c' shape in order to facilitate insertion into the core insertion hole 4, and as described above, the core (6) is firmly fixed in order to fix the core 6 formed in half. Guide groove 10 is formed on the outer periphery of 6), the clamp 12 made of steel wire to the guide groove 10 is forcibly fitted.

As shown in FIG. 6, a gap Gap occurs between the assembled core 6 and the core insertion hole 4 due to the dimensional difference between the core 6 and the core insertion hole 4. One core 6 is moved in the axial direction of the low pressure bobbin 2, which may result in an unstable assembly state.

Accordingly, an object of the present invention is to provide a low pressure bobbin for a flyback transformer in which a gap does not exist between the core insertion hole and the core of the low pressure bobbin.

The present invention for realizing the above object is a core stopper on the base surface of the core holder formed at one end of the core insertion hole formed in the conventional low pressure bobbin as much as a gap generated due to the difference in dimensions between the core and the core insertion hole. It is implemented in a configuration formed integrally projecting to the height of.

In this invention, since the core does not move in the axial direction of the low pressure bobbin by the core stopper, an unstable assembly state does not occur.

1 is an exploded perspective view of a flyback transformer showing a core support structure according to the present invention.

2 is a cross-sectional view taken along the line I-I of FIG.

3 is an exploded perspective view of a flyback transformer showing a core support structure according to the present invention.

4 is a cross-sectional view taken along the line II-II of FIG.

5 is an exploded perspective view of a flyback transformer showing a conventional core support structure.

6 is a sectional view taken along line III-III of FIG.

Explanation of symbols on the main parts of the drawings

2: low pressure bobbin 4: core insertion hole

6: core 8: core holder

14: core stopper

Preferred embodiments of the present invention configured as described above will be described in detail according to the accompanying drawings. In this embodiment, the same parts as those described with reference to FIG. 4 are denoted by the same reference numerals to avoid duplication of description.

1 is an exploded perspective view showing the core support structure of the flyback transformer according to the present invention.

A core insertion hole 4 is integrally formed at the inner circumference of the low pressure bobbin 2 constituting the flyback transformer, and the core insertion hole 4 is inserted into the core 6 having a bisected shape in a 'c' shape. do.

Since the core 6 is bisected, a guide groove 10 is formed on the outer circumference of the core 6 to fix the core 6, and the guide groove 10 is made of steel wire. Clamped clamp 12 is forcibly fitted.

As described above, the core holder 8 is integrally formed at one end of the core insertion hole 4 so as to prevent left and right flow of the core 6 inserted into the core insertion hole 4. As shown in FIG. 2, the core stopper 14 protrudes and forms the same height as the gap generate | occur | produced by the dimension difference of the core 6 and the core insertion hole 4 as shown in FIG.

3 is an exploded perspective view of a flyback transformer showing a core support structure according to the present invention.

When the edge of the core 6 is chamfered, as shown in FIG. 4, the core stopper 14 protrudes at the same height as the above gap so as to correspond to the outer circumference of the core 6 described above. Is formed.

Therefore, the core stopper 14 does not cause the core 6 to move in the axial direction of the low pressure bobbin 2, so that the assembled state of the core 6 is stabilized. .

As described above, according to the present invention, the axial position shift of the low pressure bobbin due to the gap between the core insertion hole of the low pressure bobbin and the core and the core insertion hole installed over the outside of the molding case does not occur by the core stopper. Since the core does not flow in the axial direction of the low-pressure bobbin, the assembly state of the core is stabilized, thereby greatly reducing the defective rate of the assembled product of the flyback transformer.

Claims (2)

A low pressure bobbin for a flyback transformer equipped with a core, Dimensional difference between the core 6 and the core insertion hole 4 in which the core stopper 14 is located at the base surface of the core holder 8 formed at one end of the core insertion hole 4 formed in the ordinary low pressure bobbin 4. Low pressure bobbin for a flyback transformer, characterized in that the protrusion formed at the same height as the gap generated by. The method of claim 1, The core stopper 14 has a shape corresponding to the outer circumference of the core 6 when the edge of the core 6 is chamfered, and is protruded to a predetermined height, characterized in that the low-pressure bobbin for the flyback transformer .