KR100305583B1 - Focus unit of fly back transformer - Google Patents

Abstract

The present invention relates to a focus volume slider of a focus unit. In particular, the ceramic substrate 150 is installed inside the rear surface of the cover 130 on which the operating knob 120 is installed, and thus the variable contact 172 of the slider 170 is installed. The main point is to be in contact with the resistor pattern 140 of the substrate to perform the volume adjustment operation.

Accordingly, the ceramic substrate printed with the resistor is installed inside the cover of the focus unit to be spaced apart from the FBT case in which the bobbin is installed.

Description

FOCUS UNIT OF FLY BACK TRANSFORMER

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 and a monitor, and is installed on one side of the FBT to a focus unit for adjusting the CRT and screen voltage of the CRT. In particular, a ceramic substrate having a resistive pattern formed therein is installed inside the cover on which the operating knob of the focus unit is installed, and a slider is installed at one end of the volume shaft which is communicated with the operating knob so that the center contact point of the slider is connected to the cover. In contact with the center terminal formed inside the case of the opposite side opposite, the variable contact of the slider is in contact with the upper side of the resistor pattern of the ceramic substrate to perform the volume adjustment operation, the resistor installed in the focus unit is printed Ceramic substrate attaches inside cover of focus unit Is and ever FBT case and spaced from the installation which is the bobbin is installed, yiettara relates to a focus of the unit FBT to be eliminates the need for filling and hardening the insulating resin in the interior of the focusing unit.

Conventionally known conventional FBT generates a high voltage through the high and low pressure bobbins installed therein, and supplies a high voltage to the CRT via an anode cable, wherein the focus unit installed on one side of the case of the FBT is located in the CRT. It is to change the focus voltage and the screen voltage through the volume slider.

In the structure of the conventional FBT focus unit associated with such a technique, as shown in FIG. 1, the pivoting piece 54 which is spoken with the focus and screen adjustment knob 53 into the main body portion 52 of the focus unit 51. ) And a slider 55 having two contacts on the upper side thereof is installed, and a circuit pattern portion in which the variable and center contacts 57a and 57b are printed so as to be connected to the contacts 56 and 56 'of the slider. A substrate 58 provided with 57 is installed, and an output pin 59 coupled to the substrate 58 is installed above the substrate 58 to mold the inside of the main body 52 as an insulating resin 60. Is done.

The conventional focus unit 51 having the above-described configuration, when turning the focus and screen adjustment knob 53 protruding out of the main body 52 to vary the focus and screen voltage in the CRT, The slider 55 is rotated integrally with the rotating piece 54 to change the voltage. At this time, the slider 55 has two contacts 56, 56 'formed therein and one contact 56. 2 is connected to the variable contact 57a of the circuit pattern portion 57 printed on the substrate 58 as shown in FIG. 2 to vary the focus and screen voltages, and the other contact 56 'is the center contact 57b. The output value is drawn out through the resistor.

However, the focus unit 51 as described above has the slider 55 having two contacts 56, 56 'at the end of the adjustment knob 53 in order to vary the focus and screen voltages. Since the variable and center contacts 57a and 57b are printed on the circuit pattern portion 57 of the substrate 58 so as to make contact with the two contacts, the structure becomes complicated and the disadvantage of causing a poor grounding of the contact portion is caused. It is.

In addition, the substrate 58, which is connected to the contacts 56 and 56 'of the slider 55 and the circuit pattern portion 57 is printed to vary the focus and screen voltages, is located on the back of the focus unit and is located inside. Since the bobbin which draws out the high pressure is installed in close proximity to the internal FBT case, the insulating property becomes extremely weak, and in order to overcome this problem, the epoxy resin, which is an insulating resin, is filled and cured so that the inside of the focus unit is integrated with the substrate 58. There was a problem to insulate.

The present invention has been made in order to solve the various problems of the prior art as described above, the object of which is a ceramic substrate printed with a resistor mounted on the inside of the focus unit is installed inside the cover of the focus unit, the bobbin is installed therein The FBT case is spaced apart from each other, and thus, the focus and screen voltage adjustment can be reliably performed while ensuring the effective insulation of the substrate without the need for filling and curing the insulating resin inside the focus unit. In addition, to provide a focus unit of the FBT that can be easily produced the focus unit.

1 is a front sectional structural view showing an internal structure of a focus unit for explaining a general FBT focus volume slider.

2 is a schematic structural diagram of a volume slider installed in a conventional focus unit.

3 is a front sectional structural view showing the internal structure of the focus unit for explaining the focus volume slider of the FBT according to the present invention.

4 is a view showing a mounting structure of a slider provided on a substrate on which a resist pattern according to the present invention is printed.

5 is a planar structural diagram of a slider installed in the focus unit of the present invention.

6 is a main structural view showing a coupling structure of the step portion and the slider of the volume shaft according to the present invention.

Explanation of symbols on the main parts of the drawings

110 ... Focus unit 120 ... Operating knob

130 ... cover 140 ... resistor pattern

150 ... ceramic substrate 160 ... volume shaft

161 ... step 163 ... coupling hole

164 ... Elastic mating pieces 170 ... Slider

171 Center contact 172 Variable contact

180 ... case 190 ... center terminal

200 ... Slider support 210 ... Guide groove

As a technical configuration for achieving the above object, the present invention provides a cover of a focus unit in which a shaft through hole is formed so that the operating knob protrudes,

A volume shaft which is integral with the operating knob and is inserted into the shaft through hole of the cover;

And a substrate installed inside the rear surface of the cover and having a resistor pattern formed on an upper surface thereof.

A slider which is installed at one end of the volume shaft and has a variable contact configured to perform a volume adjustment operation by contacting a dozen contact and a resistor pattern of a substrate;

By providing a focus unit of the FBT comprising a case in which the center contact point of the slider is provided inside the contact so that the center terminal is located opposite to the cover.

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

3 is a front sectional front view showing the internal structure of the focus unit for explaining the focus unit substrate and the slider of the FBT according to the present invention, Figure 4 is a mounting structure of the slider provided on the substrate printed with the resistor pattern of the present invention As shown in FIG. 3, the volume shaft 160 is integrally formed with the operating knob 120 into the cover 130 of the focus unit 110 in which the shaft through hole 131 is formed so that the operating knob 120 protrudes outward. ) Is introduced into the shaft through hole 131 of the cover 130, and a substrate 150 is formed on the upper surface of the cover 130 to form a resistor pattern 140 on an upper surface thereof.

In addition, a middle contact 171 is installed at one end of the slider 170 installed at one end of the operation knob 120 and the volume shaft 160, and the resistive pattern 140 of the substrate 150 is opposite to the opposing side. ) And a variable contact 172 is provided to contact each other and perform volume adjustment.

In this case, the center contact point 171 of the slider 170 is in contact with the center terminal 190 installed in the case 180 positioned on the opposite side of the cover 130 to output a variable voltage. .

The slider support piece 200 is integrally bent at the circumference of the operating knob 120 and the volume shaft 160, and is guided and rotated in the guide groove 210 of the cover 130.

In addition, a coupling hole 163 is formed in the center of the slider 170 coupled to one end of the volume shaft 160 so that the stepped portion 161 of the volume shaft 160 can be inserted into and inserted into the coupling hole 163. In the configuration, the stepped portion 161 of the volume shaft 160 is elastically supported and the elastic coupling piece 164 is fixedly installed to be integrally inclined.

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

3 to 6, the focus unit 110 installed on one side of the FBT case has a resistor pattern 140 formed inside the cover 130 in which the operation knob 120 protrudes outward. In a state where the ceramic substrate 150 is positioned and installed integrally on the rear surface of the cover 130, the slider 170 is mounted on one end of the volume shaft 160 that is extended from the operating knob 120.

Accordingly, the operating knob 120 is rotated to vary the focus and screen voltage, and the center contact point 171 of the slider 170 is formed inside the case 180 opposite to the cover 130. Contact with the central terminal 190, and the variable contact 172 of the slider 170 rotates in contact with the resistor pattern 140 of the ceramic substrate 150 mounted on the rear surface of the cover 130. You will be doing focus and screen volume adjustments.

When performing the volume adjustment operation through the slider 170 spoken with the volume shaft 160, the variable contact 172 of the slider 170 is a ceramic that is installed on the back of the cover 130, as shown in FIG. In contact with the resistor pattern 140 of the substrate 150, and is separated from the FBT case generating a high voltage by a predetermined distance, without the need for a separate insulating resin filling and curing work inside the focus unit 110 As the insulation property of the ceramic substrate 150 can be effectively ensured, the focus and the screen voltage adjustment through the slider 170 can be reliably performed.

On the other hand, in the volume shaft 160 on which the slider 170 is mounted, the stepped portion 161 of the volume shaft 160 is inserted into the coupling hole 163 formed at the center of the slider 170 coupled to one end thereof. In the coupled state, as shown in FIG. 6, the elastic coupling piece 164 protrudes inclined to both sides of the coupling hole 163 of the slider 170 so that the stepped portion 161 of the volume shaft 160 is elastic. The coupling piece 164 is elastically coupled and fixed.

When the step 161 of the volume shaft 160 is fixed to the elastic coupling piece 164 of the slider 170, the stepped portion 161 of the square shape is also a coupling hole of the slider of the square shape. In the state of being closely inserted in the 163, the inclined end of the elastic coupling piece 164 is opened, the end of the elastic coupling piece 164 is completed when the stepped portion 161 is completed insertion to a certain depth The wedge shape is fixed in a state in which both sides of the stepped portion 161 are press-fitted so that the stepped portion 161 of the volume shaft 160 does not come off from the slider 170 at all.

Subsequently, the volume shaft 160 spoken with the actuating knob 120 is configured to secure a constant torque to the slider 170 spoken with the volume shaft 160 by the actuating knob 120. At the periphery of the volume shaft 160, the slider support piece 200 integrally formed therewith is bent vertically, thereby inserting the slider support piece 200 into the guide groove 210 of the cover 130, thereby providing the slider. The rotation torque of the 170 is adjusted by the slider support 200, and at this time, the grease G is applied to the inside of the guide groove 210 of the cover 130 that contacts the end of the slider support 200. Make sure you get the desired rotation.

According to the focus unit of the FBT according to the present invention as described above, the ceramic substrate installed inside the focus unit is installed inside the cover of the focus unit, so as to be spaced apart from the FBT case in which the bobbin is installed therein. It is possible to effectively secure the insulation of the substrate without the need for additional filling and curing of the insulating resin inside the unit, and it is possible to reliably perform the focus and screen voltage adjustment through the slider of the focus unit. Of course, there is an excellent effect that the production of the focus unit can be easily made.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the following claims. Those of ordinary skill will want to know easily.

Claims (5)

In the focus unit of the FBT, The cover 130 of the focus unit 110, the shaft through hole 131 is formed so that the operating knob 120 protrudes, A volume shaft 160 which is integrally communicated with the operation knob 120 and inserted into the shaft through hole 131 of the cover 130; And a substrate 150 installed inside the rear surface of the cover 130 and having a resistor pattern 140 formed on an upper surface thereof. A slider 170 mounted to one end of the volume shaft 160 and having a variable contact 172 for contacting the dozen contact 171 and the resistor pattern 140 of the substrate 150 to perform a volume adjustment operation; , The center terminal 190 is installed therein so that the center contact 171 of the slider 170 is in contact with the case 180, which is configured to be positioned on the opposite side facing the cover 130. Focus unit. According to claim 1, Slider support piece 200 is formed integrally bent at the periphery of the volume knob 160 and the operation knob 120, the guide knob 210 of the cover 130 is rotated Focus unit of FBT characterized in that it is made. The focus unit of claim 2, wherein a grease (G) is coated inside the guide groove (210) for adjusting the torque of the slider by inserting the slider support (200) of the volume shaft (160). The method of claim 1, wherein the coupling hole 163 is formed in the center of the slider 170, which is installed on one end of the volume shaft 160, the stepped portion 161 of the volume shaft 160 is inserted into the insertion shaft. FBT focus unit. The method of claim 4, wherein both sides of the coupling hole 163, characterized in that the elastic coupling piece 164 protruding integrally protruding integrally to the stepped portion 161 of the volume shaft 160 is fixed integrally. FBT focus unit.