KR20020045939A - Device for prevent damp of fbt focusunit - Google Patents

Abstract

PURPOSE: A device for preventing moisture inflow into focus unit of FBT(Fly Back Transformer) is provided to cut off inflow of moisture into a focus unit of an FBT completely by injecting an insulation resin into a groove of a cover combination unit. CONSTITUTION: A focus case(120) includes a high voltage condenser and a bleeder resistor. A focus cover is combined with a partition wall of the focus case(120). A cover combination groove(150) is formed on the partition wall of the focus case(120). A resin injection hole(160) is punched on the cover combination groove(150) of the focus case(120). An insulation resin is injected into the focus case(120) through a resin injection hole(160).

Description

Focus unit moisture inflow prevention device of flyback transformer {DEVICE FOR PREVENT DAMP OF FBT FOCUSUNIT}

The present invention is a flyback transformer (hereinafter referred to as "FBT"), which is a high voltage generator for supplying high voltage to a CRT of a TV or a monitor, when the cover is coupled to a case of a focus unit installed to one side of the FBT. Insulation resin flows into the recess of the coupling part to completely block the inflow of moisture into the focus unit, and this is related to the FBT's focus unit moisture inflow prevention device to improve the product characteristics. A high pressure condenser and a breather resistor are installed inside the isolation wall to form a cover coupling groove formed at an upper edge of the isolation wall of the focus case which is molded and cured as an insulating resin, and a plurality of resin inflow holes are formed in the cover coupling groove. A coupling step is formed at an inner side of the focus cover coupled to the focus case, so that the cover coupling groove It is tightly inserted and fixed, and the insulating resin flows into the cover coupling groove of the focus case so that the molding hardens integrally with the coupling step of the focus cover, so that the insulating resin flows into the coupling portion between the case and the cover of the focus unit. The present invention relates to a FBT focus unit moisture inflow prevention device that hardens to completely prevent inflow of external moisture and the like into the gap between the coupling parts, and accordingly, further improves the electrical characteristics of the focus unit.

In general, the FBT focus unit is provided with a high-pressure condenser and a bleeder resistor installed therein through an isolation wall, and then molded and cured with an insulating resin. A groove is formed so that the coupling end of the focus cover is coupled to draw the focus and the screen voltage.

In the cover coupling structure of the conventional focus unit related to the above technique, as shown in FIG. 1, the inside of the focus case 20 in which the high-pressure condenser and the bleeder resistor and the like are installed through the isolation wall 10 is disposed. Molded and cured as an insulating resin, the cover coupling groove 50, which is a cover coupling portion 40 to which the focus cover 30 is coupled, is formed on the upper edge of the isolation wall 10 of the focus case 20, and the focus cover Coupling end portion (60) provided at the periphery of the (30) is made of a configuration that is inserted into the cover coupling groove (50) to engage.

Conventional focus unit cover having a coupling structure as described above, after the high-pressure capacitor and the bleeder resistance is built in the lower portion of the focus case 20 composed of the upper and lower portions through the isolation wall 10, the insulating resin, Is molded and cured, and a cover coupling groove 50 is formed at an upper circumference of the isolation wall 10 of the focus case 20 so that the peripheral coupling end portion 60 of the focus cover 30 on which a substrate is mounted is formed. It is installed and completes a focus unit.

However, as shown in FIG. 2, the focus cover 30 coupled to the isolation wall 10 of the focus case 20 is simply inserted into the cover coupling groove 50 by the coupling end portion 60, which is a peripheral portion thereof. The gap is easily generated due to the coupling, and accordingly there is a disadvantage in that external moisture or the like is easily introduced into the focus cover 30 installed inside the substrate (not shown).

Moisture introduced into the focus cover 30 and the focus case 20 causes a problem in varying the focus and screen voltage of the focus unit, and there are many problems such as deterioration of reliability of the product due to malfunction. will be.

The present invention has been made in order to improve the above conventional problems, the object is that the insulating resin is introduced into the coupling portion between the case and the cover of the focus unit inlet hardening to the outside moisture is introduced between the gap between the coupling portion. Not only to completely block, but also to stably protect the substrate installed inside the cover of the focus unit, and to provide a focus unit moisture inflow prevention device of the FBT that can further improve the electrical characteristics of the focus unit.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic exploded perspective view of a focus case of a general FBT focus unit and a focus cover installed above.

Figure 2 is a front cross-sectional structure of the coupling state of the focus cover coupled to the conventional focus case and its upper.

3 is a schematic exploded perspective view of a focus case of an FBT focus unit and a focus cover installed above the FBT focus unit according to the present invention;

Figure 4 is a main structure of the resin inlet hole formed in the cover coupling groove of the present invention focus case.

Explanation of symbols on the main parts of the drawings

100 ... focus unit 110 ... isolating wall

120 ... Focus case 130 ... Focus cover

140 ... Cover coupling 150 150 ...

160 ... Resin inlet hole 170 ... Joint step

As a technical means for achieving the above object, the present invention, the inside of the focus case, the high-pressure condenser, the bleeder resistor and the like is formed through the isolation wall is molded and cured as an insulating resin, the isolation wall of the focus case In the focus unit of the FBT to be coupled to the focus cover on which the substrate is installed on the upper side,

A cover coupling groove formed around the isolation wall upper side of the focus case;

A resin inlet hole formed in a plurality of cover coupling grooves of the focus case such that an insulating resin molded under the isolation wall of the focus case is introduced;

And a coupling step protruding to the inner side of the focus cover coupled to the focus case to be tightly inserted into and fixed to the cover coupling groove, and an insulating resin flows into the cover coupling groove of the focus case to couple the coupling step of the focus cover. It is by providing a focus unit moisture inflow prevention device of the FBT, characterized in that the molding is cured integrally with the.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a schematic exploded perspective view of the focus case and the focus cover of the FBT focus unit according to the present invention installed on the upper side, Figure 4 is a structural diagram of the main portion of the resin inlet hole formed in the cover coupling groove of the present invention, the isolation wall An internal portion of the focus case 120 having a high pressure capacitor and a bleeder resistor (not shown) installed therein is installed to be molded and cured as an insulating resin through the 110, and an isolation wall of the focus case 120 is formed. 110, a cover coupling part 140 to which the focus cover 130 is coupled is provided at an upper circumference thereof, and the focus cover 130 is installed to be fixed to the upper side of the focus case 120.

In addition, a cover coupling groove 150 is formed at the upper periphery of the isolation wall 110 of the focus case 120, and the insulating resin filled in the lower side of the isolation wall 110 of the focus case 120 is introduced therein. A plurality of resin inlet holes 160 are installed in the cover coupling groove 150 of the focus case 120.

In addition, the inner edge of the focus cover 130 coupled to the focus case 120, the coupling step 170 is protruded and the coupling step 170 is tightly inserted and fixed to the cover coupling groove 150, It consists of a configuration that is installed to be integrally molded by the insulating resin flows.

Reference numeral 100 in the figure denotes a focus unit of the FBT.

Referring to the operation and effect of the present invention made of such a configuration as follows.

3 and 4, after the high-pressure condenser and the bleeder resistor (not shown) are installed therein through the isolation wall 110, the focus case is injected and cured of epoxy resin, which is an insulating resin ( On the upper periphery of the isolation wall 110 of the 120, a cover coupling part 140 is provided to couple the focus cover 130 into which the substrate (not shown) is embedded, so that the focus cover 130 of the focus case 120 is formed. The coupling is fixed upward.

At this time, the cover coupling portion 140 provided on the upper peripheral edge of the isolation wall 110 of the focus case 120 in a state where the cover coupling groove 150 is formed, the isolation wall 110 of the focus case 120. A plurality of resin inlet holes 160 are formed in the cover coupling groove 150 of the focus case 120 so that a small amount of the insulating resin filled in the lower side may flow into the cover coupling groove 150.

The focus cover 130 coupled to the focus case 120 continues to protrude and install a coupling step 170 at an inner circumference thereof to closely insert the coupling step 170 into the cover coupling groove 150. When fixed, the insulating resin flowing through the resin inlet hole 160 of the cover coupling groove 150 is molded integrally with the coupling step 170 to be coupled.

Accordingly, the coupling step 170 of the focus cover 130 is integrally molded by curing of the epoxy resin in the cover coupling part 140 formed around the isolation wall 110 of the focus case 120. Penetration of moisture, etc. can be completely blocked.

As described above, according to the FBT focus unit moisture inflow prevention device of the present invention, the insulating resin is introduced into the coupling portion between the case and the cover of the focus unit to completely block the inflow of external moisture and the like into the gap between the coupling portions. Of course, according to this there is an excellent effect to stably protect the substrate installed inside the cover of the focus unit, and further improve the electrical characteristics of the focus unit.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (2)

The inside of the focus case 120 in which the high-pressure condenser and the bleeder resistor, etc. are installed through the isolation wall 110 is molded and cured as an insulating resin, and the inside of the focus wall 120 is disposed above the isolation wall 110. In the focus unit of the FBT to which the focus cover 130 on which the substrate is installed is coupled, A cover coupling groove 150 formed at an upper edge of the isolation wall 110 of the focus case 120; A resin inlet hole 160 formed in a plurality of cover coupling grooves 150 of the focus case 120 such that an insulating resin molded under the isolation wall 110 of the focus case 120 is introduced; FBT protruding into an inner side of the focus cover 130 coupled to the focus case 120 and including a coupling step 170 installed to be tightly inserted into the cover coupling groove 150. Focus unit moisture ingress prevention device. 2. The apparatus of claim 1, wherein an insulating resin flows into the cover coupling groove of the focus case so as to be molded and hardened integrally with the coupling step of the focus cover.