KR100309185B1 - Fly back transformer of focusunit - Google Patents

Abstract

PURPOSE: A focus unit of a flyback transformer is provided to certainly vary a screen voltage and a focus, and improve workability and productivity in assembling a focus unit. CONSTITUTION: A focus protrudes to the outside of a body of a focus unit. When the focus and a screen adjusting handle(3) are turned to vary a focus and a screen voltage of a cathode ray tube, a slider(5) which is installed on an upper side is integrally rotated by rotation of a rotary section(4) which is connected to the adjusting handle(3), whereby a process of varying the focus and the screen voltage is performed in a state that a contact point of a circuit pattern part which is printed on a substrate is contacted with a contact point(6) of the slider(5). An output is provided through an output pin(9). The body of the focus unit allows coupling sections(11) which are integrally formed with jaws(10) to be installed on both insides thereof. The jaws(10) of the coupling sections(11) are inserted into a coupling hole of the substrate which is installed inside the body, thereby fixing and supporting the substrate.

Description

Fly back transformer of focusunit

The present invention relates to a focus unit that is installed on one side of the FBT in a flyback transformer (hereinafter referred to as "FBT") that is a high voltage generator for supplying a high voltage to a CRT of a TV or a monitor. In particular, the engaging piece is formed integrally to both sides of the main body portion of the FBT focus unit is installed to be fixed and coupled to the substrate installed inside the main body portion, one each of the focus and the screen adjustment knob and the upper side of the rotating piece A slider, which is a contact point, is installed to contact the pattern portion of the substrate to vary the voltage, and a cover coupling step is formed inside the upper part of the main body to insulate the inside of the main body by the insulation cover and the ultrasonic welding. When manufacturing the unit, change the focus and screen voltage in the main body of the focus unit. The slider, which is a contact portion, is easily and easily installed, and the slider contacts a pattern portion of the substrate so that the focus and the screen voltage can be reliably changed, and the ultrasonic cover is ultrasonically fused to the upper portion of the main body. The present invention relates to a focus unit of FBT, which is not installed and does not need to mold a separate insulation resin for internal insulation of the focus unit, thereby further improving workability and productivity due to assembly of the focus unit.

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

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 change the focus and screen voltage in the CRT, The slider 55 rotates integrally with the pivoting piece 54 to vary the voltage. In this case, the slider 55 has two contacts 56 and 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 voltage. The variable and center contacts 57a and 57b are printed on the circuit pattern portion 57 of the substrate 58 so that the two contacts and the connection thereof become complicated, resulting in a complicated structure and a poor grounding of the contact portion. Is there.

In addition, after the conductors are separately printed on the substrate 58, the lower end of the output pin 59 is joined by the solder and placed in the state, and the substrate 58 has a focus unit (using an epoxy resin at the lower periphery). In order to install the main body 52 of the 51 and protect it, the complex structure of the focus unit 51 according to the filling and curing of the epoxy resin, which is a separate insulating resin, is provided on the upper side of the substrate 58 to improve the assembly and productivity. There are many problems such as extremely low.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the object thereof is that, when manufacturing the focus unit of the FBT, it is easy to install a slider which is a contact unit for varying the focus and screen voltage in the main unit of the focus unit. In particular, the slider having one contact point can be connected to one contact point of the circuit pattern part to reliably change the focus and screen voltages, as well as through a coupling piece placed inside the main body of the focus unit. The substrate is firmly bonded, and the upper insulating cover is installed by ultrasonic welding so that it is not necessary to mold a separate insulating resin for the internal insulation of the focus unit, further improving workability and productivity in assembling the focus unit. It is to provide a focus unit of FBT that can be improved.

1 is a front cross-sectional view showing the internal structure of a typical FBT focus unit.

2 is a view showing a circuit pattern of a substrate (PCB) installed in a conventional focus unit.

Figure 3 is a front cross-sectional view showing the internal structure of the FBT focus unit according to the present invention.

Figure 4 is a side cross-sectional structural view of the FBT focus unit of the present invention.

5 is a main structural diagram showing a slider coupling structure of the focus unit according to the present invention.

6 is a view showing a circuit pattern of a substrate installed inside the focus unit of the present invention.

* Description of the symbols for the main parts of the drawings *

1.Focus unit 2 ... Main unit

3.Adjusting knob 4 ... Rotating

5 ... slider 6 ... contact

7.circuit pattern part 8 ... substrate

9 ... output pin 10 ... jamming jaw

11 ... Joining piece 12 ... Joining hole

13 Cover mounting step 14 Insulation cover

15.Elastic coupling protrusion

As a technical configuration for achieving the above object, the present invention, the engaging piece is formed integrally with both sides of the main body portion of the FBT focus unit is installed to be fixed and coupled to the substrate installed inside the body portion, focus and screen adjustment A slider having one contact point is provided above the rotating piece that is spoken to the handle, and is connected to the circuit pattern part of the board to vary the voltage. A cover coupling step is formed inside the upper part of the main body to insulate the insulation cover and ultrasonic welding. By providing a focus unit of the FBT made of a configuration to insulate the inside of the main body portion.

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

3 and 4 are front and side cross-sectional structural views of the FBT focus unit according to the present invention, and FIG. 5 is a structural diagram of main parts of a slider having a single contact, which is inside the main body 2 of the focus unit 1. Rotating piece (4) which is addressed with focus and screen adjustment knob (3) is spoken, and slider (5) is installed on the upper side, and circuit pattern (7) is printed to connect and connect with contact (6) of the slider. The substrate 8 is installed, and the output pin 9 coupled to the substrate 8 is placed on the upper side of the substrate 8.

In addition, the coupling hole 11 of the substrate 8 installed inside the main body 2 is provided with a coupling piece 11 in which the locking jaw 10 is integrally formed at both sides of the main body 2 of the focus unit 1. 12, a slider 5 having one contact point 6 is provided above the pivoting piece 4, which is inclined to be inserted into and inserted into the focusing and screen adjusting knob 3, and the circuit pattern of the substrate 8, respectively. It is connected to the unit 7 so as to vary the voltage, and the cover coupling step 13 is formed inside the main body 2, the insulation cover 14 and the inside of the main body 2 by ultrasonic welding do.

In addition, the slider (5) having one contact point (6) has a plurality of elastic coupling protrusions (15) installed on the lower side thereof so as to be fixed to the lower end of the output pin (9) protruding above the insulation cover (14). It consists of a configuration.

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

As shown in Figs. 3 to 6, when the focus and screen voltage of the CRT are varied by turning the focus and screen adjustment knob 3 which protrudes out of the main body 2 of the focus unit 1, By the rotation of the rotating piece 4 which is extended to the adjustment knob 3, the slider 5 mounted on the upper side rotates integrally, and prints on the contact 6 of the slider 5 and the board | substrate 8. The focus and screen voltage varying operations are performed in the state where the contacts of the circuit pattern unit 7 are connected, and are outputted through the output pin 9 connected thereto.

In this case, the main body 2 of the focus unit 1 is provided with a coupling piece 11 having integrally formed locking jaws 10 at both sides thereof, and having a substrate 8 installed inside the main body 2. As the locking jaw 10 of the coupling piece 11 is inserted into the coupling hole 12 of the coupling hole 12, the substrate 8 is fixed and supported, and the locking jaw 10 is fixed into the main body 2 by the locking jaw 10. The substrate 8 is bonded in a solid state without the need for a separate coupling means.

Subsequently, a slider 5 having one contact point 6 is provided above the focusing and screen adjustment knob 3 and the pivoting piece 4 which is extended, and the circuit of the substrate 8 as shown in FIG. By being in contact with the pattern portion 7, the rotational trajectory of the contact 6 according to the rotation of the slider 5 is smoothed so as to reliably perform the variable operation of the focus and screen voltage.

In particular, the slider 5 having one contact point 6 has an output pin 9 protruding upward from the insulation cover 14 with a plurality of elastic coupling protrusions 15 installed below the slider 5 as shown in FIG. 5. In the state coupled with the lower end, the projection P protruding on the pivoting piece 4 is inserted into the fixing hole (not shown) formed at one side of the lower part of the slider 5 so as not to require a separate coupling means. The slider 5 is fixedly fixed to the pivoting piece 4 in a solid state.

On the other hand, as shown in Figures 3 and 4, the cover coupling step 13 is formed in the upper inside of the main body portion 2, when the end of the insulating cover 14 is in close contact with the insulating cover 14 and the main body ( 2) By welding between them by ultrasonic welding to insulate the inside of the main body 2, it is not necessary to mold an epoxy resin or the like which is an insulating resin in order to protect the substrate 8.

According to the focus unit of the FBT according to the present invention as described above, when manufacturing the focus unit of the FBT, the installation of the slider, which is a contact unit for varying the focus and screen voltage in the main unit of the focus unit is made easy and easy, especially one The slider having four contacts is connected to one contact point of the circuit board pattern part to reliably change the focus and screen voltages, and the board does not need any additional coupling means through a coupling piece placed inside the main body of the focus unit. Is firmly combined without flow, and the insulating cover is installed on the upper side of the substrate by ultrasonic welding, so that it is not necessary to mold a separate insulating resin for the internal insulation of the focus unit. There is an excellent effect to further improve.

Claims (1)

Inside the main body 2 of the focus unit 1, the pivoting piece 4 which is communicated with the focus and screen adjustment knob 3 is delivered, and a slider 5 having one contact point 6 is installed on the upper side thereof. The circuit pattern portion 7 is formed on the substrate 8 so that the contact 6 of the slider 5 is connected and connected, and an output pin 9 coupled thereto is placed above the substrate 8. The coupling hole 11 of the substrate 8 installed inside the main body 2 is provided with a coupling piece 11 having the locking jaw 10 integrally formed at both sides of the main body 2 of the focus unit 1. 12) In the focus unit of FBT, which is configured to be inserted into the insertion tube, A cover engaging step 13 is formed in the upper part of the main body 2 to insulate the inside of the main body 2 by the insulation cover 14 and the ultrasonic fusion, and the rotating piece that is extended to the adjusting knob 3. Projection (P) protrudes on the (4) to fix the slider (5), a plurality of elastic coupling projections 15 are installed below the slider (5) protruding output pin protruding above the insulating cover (14) (9) Focus unit of the FBT, characterized in that consisting of the configuration to be fixed to the lower end combined.