KR200194020Y1 - Fixing structure for ferrite core of fly back transformer - Google Patents

Abstract

The ferrite core fixing structure of the flyback transformer according to the present invention is a fixed structure of the upper and lower ferrite cores inserted into the low pressure bobbin of the flyback transformer, and is fixed to the center bottom surface of the upper ferrite core inserted into the low pressure bobbin. To prevent the deflection projections on the top surface of the FBT case to transmit the tension to maintain a constant distance between the FBT case and the upper ferrite core.

Here, the sag-preventing projections are characterized in that a plurality of protrusions corresponding to each other in the upward direction with a predetermined slope on the top surface of the FBT case.

According to the present invention, by preventing the deflection projections that can act as a tension to the FBT case, by supporting the bottom of the ferrite core to prevent the sag, while preventing the occurrence of flow due to gap adhesion failure of the ferrite core It is to reduce the deviation of the stable inductance value and the output voltage of the flyback transformer.

Description

Fixing structure for ferrite core of Fly Back Transformer

In the ferrite core fixing structure of the flyback transformer (FBT) according to the present invention, in order to prevent the flow of the ferrite core, in particular, the projection having a constant tension on the top of the FBT case to prevent the sagging of the ferrite core is FBT It relates to a ferrite core fixing structure for maintaining a constant distance between the case and the ferrite core.

In general, a flyback transformer is a device that applies various voltages to a high voltage and circuit board of 22KV to 30KV to a video display device (TV, monitor, etc.).

The structure of such a conventional flyback transformer is as shown in FIG.

FBT case 11 forming the appearance of a flyback transformer, a focus pack 12 for applying focus and screen voltage to the CRT, a high pressure bobbin 13 for winding a high pressure coil, and a low pressure for winding a low pressure coil. The gap between the upper and lower ferrite cores 15a and 15b coupled to the bobbin 14 and the low pressure bobbin 14 to serve as a magnetic circuit, and the upper and lower ferrite cores 15a and 15b. The core gap 16 for adjusting the configuration, and the core band 17 for giving elasticity to the outer side of the upper and lower ferrite cores (15a, 15b) coupled to the low-pressure bobbin (14).

The ferrite core fixing structure of the conventional flyback transformer configured as described above will be described with reference to the accompanying drawings.

First, the flyback transformer combines a low pressure bobbin 14 wound with a low pressure coil into a high pressure bobbin 13 wound with a high pressure coil, and forms an appearance outside the coupling of the low pressure and high pressure bobbin 13 and 14. The case 11 is coupled.

Then, the focus pack 12 for applying the voltage generated from the high-pressure bobbin 13 to the focus and screen voltage of the CRT is coupled to one side of the FBT case 11.

After the lower ferrite core 15b is coupled to the lower side of the low pressure bobbin 14, a core gap 16 is inserted into both end surfaces of the ferrite core 15b, and the upper ferrite core is opposed to the lower ferrite core 15b. Couple 15a to the upper side of the low pressure bobbin 14. And the upper and lower ferrite cores (15a) (15b) is fixed to the upper and lower ferrite cores (15a, 15b) by inserting a core band 17 having a certain elasticity to the outer portion.

However, since the sizes of the upper and lower ferrite cores 15a and 15b and the dimensions of the core gap 16 are different from model to model, the upper and lower ferrite cores 15a and 15b are combined to obtain a stable inductance value. The lower ferrite cores 15a and 15b are coupled to the low pressure bobbin 14 in close contact.

However, since the size of the upper and lower ferrite cores 15a and 15b and the size of the core gap 16 are not constant, the FBT case 11 and the upper ferrite cores are used to control the inductance of the flyback transformer. A constant interval c is required between the 15a.

When the upper ferrite core 15a is coupled, sagging and sagging of the upper ferrite core 15a occurs by the interval c, and thus, a stable inductance value cannot be obtained in the ferrite cores 15a and 15b. In addition, there is a problem that affects the output voltage deviation of the flyback transformer.

The present invention is derived to solve the above-mentioned conventional problems, by preventing the deflection of the ferrite core inserted into the low-pressure bobbin of the flyback transformer by the projection to prevent the deflection protrusions that can act on the FBT case It is an object of the present invention to provide a ferrite core fixing structure of a flyback transformer to prevent flow by tension of a sag preventing protrusion after assembling the ferrite core, regardless of the size of the ferrite core or the thickness of the core gap.

1 is an exploded perspective view for showing a ferrite core fixing structure of a conventional flyback transformer.

Figure 2 is a cross-sectional view of the AA 'by the conventional combination of FIG.

Figure 3 is a front view for showing a ferrite core fixing structure of the flyback transformer according to the present invention.

Figure 4 is a cross-sectional view of B-B 'by the combination of Figure 3 according to the present invention.

<Explanation of symbols for the main parts of the drawings>

11,21 ... FBT Case 12,22 ... Focus Pack

13,23 ... High Pressure Bobbin 14,24 ... Low Pressure Bobbin

15a, 15b, 25a, 25b ... ferrite core 16,26 ... core gap

17.CORE BAND 11a

To achieve the above object, the ferrite core fixing structure of the flyback transformer according to the present invention,

In the fixed structure of the upper and lower ferrite cores inserted into the low pressure bobbin of the flyback transformer,

It is characterized in that to maintain a constant gap between the FBT case and the upper ferrite core by projecting a deflection prevention projection on the top surface of the FBT case to deliver a constant tension to the center bottom of the upper ferrite core inserted into the low-pressure bobbin. do.

Here, the sag-preventing projections are characterized in that a plurality of protrusions corresponding to each other in the upward direction with a predetermined slope on the top surface of the FBT case.

Hereinafter, with reference to the accompanying drawings as follows.

Figure 3 is a front view for showing the ferrite core fixing structure of the flyback transformer according to the present invention, Figure 4 is a side cross-sectional view of BB 'by the combination of FIG.

3 and 4, the FBT case 21 forming the appearance of the flyback transformer, the focus pack 22 applying the focus and screen voltage to the CRT, and the high pressure bobbin winding the high pressure coil 23. ), A low pressure bobbin 24 winding the low pressure coil, upper and lower ferrite cores 25a and 25b coupled to the low pressure bobbin 24 to serve as a magnetic circuit, and the ferritious core 25a. Core gap 26 for adjusting the interval of the (25b) and the sag to transfer a predetermined tension to the center bottom surface of the upper ferrite core (25a) so that the upper ferrite core (25a) is spaced apart from the FBT case at regular intervals. The prevention protrusion 21a is a structure which protrudes on the upper surface of the FBT case 21.

Here, the sag-preventing protrusions 21a are plural on the top surface of the FBT case 21 and have a predetermined inclination so as to transfer a predetermined tension to the center bottom surface of the upper ferrite core 25a.

The ferrite core fixing structure of the flyback transformer according to the present invention configured as described above will be described with reference to the accompanying drawings.

First, inside the FBT case 21, the high pressure bobbin 23 and the low pressure bobbin 24 are assembled and coupled, and the upper and lower ferrite cores 25a and 25b serving as magnetic circuits to the low pressure bobbin 24. ) Is inserted, and the gap is adjusted by combining the core gap 26 between the upper and lower ferrite cores (25a, 25b).

At this time, when the upper ferrite core 25a is inserted into the low pressure bobbin 24, a plurality of plunges on the top surface of the FBT case 21 correspond to each other and the deflection preventing protrusion 21a protruded upwards has a predetermined tension. As a result, the bottom surface of the central portion of the upper ferrite core 25a is supported.

The deflection preventing protrusion 21a is formed on the upper surface of the FBT case 21 and transmits a predetermined tension to both sides of the central bottom surface of the upper ferrite core 25b coupled to the upper portion of the low pressure bobbin 24 so as to transmit the FBT case 21. The upper surface and the upper ferrite core (25b) is spaced at a predetermined interval ('c') to prevent the sag.

In addition, due to the tension of the deflection preventing protrusion 21a, it is possible to maintain a constant gap even after assembling regardless of the size of the ferrite core or the thickness of the core gap 26 and the deflection of the ferrite cores 25a and 25b. Can prevent the flow.

As described above, the ferrite core fixing structure of the flyback transformer according to the present invention is to support the central bottom surface of the ferrite core to prevent the sag by protruding the projection to prevent the deflection can act on the FBT case. On the other hand, by preventing the occurrence of flow due to the gap adhesion failure of the ferrite core has the effect of reducing the deviation of the stable inductance value and the output voltage of the flyback transformer.

Claims (2)

In the fixed structure of the upper and lower ferrite cores inserted into the low pressure bobbin of the flyback transformer, It is characterized in that to maintain a constant gap between the FBT case and the upper ferrite core by projecting a deflection prevention projection on the top surface of the FBT case to deliver a constant tension to the center bottom of the upper ferrite core inserted into the low-pressure bobbin. Ferrite core fixation structure of the flyback transformer. The method of claim 1, The sag-preventing projection has a predetermined slope on the top surface of the FBT case ferrite core fixing structure of the flyback transformer, characterized in that the plurality of protrusions corresponding to each other in the upward direction.