KR100243248B1 - Contact spring for inner shield of color cathode ray tube - Google Patents

Abstract

The present invention relates to a contact spring device using an inner shield for replacing a function of a contact spring by using an inner shield inside a color cathode ray tube. A frame welded by a shadow mask supported by the panel, an inner shield for shielding the geomagnetism on the upper part, and a portion of the body of the inner shield is cut and electrically connected to the internal graphite inside the funnel to fluoresce the fluorescence. In the color cathode ray tube provided with a bypass means for discharging electrons charged in the film to the anode, the bypass means is an inner shield clip fixing portion formed at the center of the short and short edge of the rectangular inner shield 38. (40) An arc-shaped incision surrounding the periphery is provided, and the cut arc-shaped connection piece 41 is formed inside the funnel 36. And arc-shaped connection pieces 41 electrically connected to the embedded graphite to discharge electrons charged in the fluorescent film to the anode.

Description

Color Cathode Ray Tube with Contact Spring Device Using Inner Shield

1 is a partial cross-sectional side view of a colored cathode ray tube.

2 is an exploded perspective view of a color cathode ray tube.

3 is an exploded perspective view of a conventional inner shield having a contact spring.

4 is a perspective view of an inner shield applied in the first embodiment of the present invention.

5 is a perspective view of the inner shield applied in the second embodiment of the present invention.

6 is a perspective view of an inner shield applied in a third embodiment of the present invention.

7 is a perspective view of an inner shield applied in the fourth embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1, 21: fluorescent film 2: electron shield

3, 25: frame 4, 24: shadow mask

5: deflection yoke 6: base

7: electron gun 8: getter

9, 35, 37, 41, 51, 61: inner shield

10: internal graphite 11, 36: funnel

12, 31, 37: contact spring 13, 23: stud pin

14, 22: Panel 15: Lug

16: band 17, 27: spring

18, 26: hook 28: spring coupling medium hole

30: contact spring coupling hole 32: inner shield clip

33, 38, 42, 52, 62: inner shield coupling hole

34, 39, 43, 53, 63: inner shield clip fixing part

36: funnel 40: cut arc-shaped connection piece

44: cut-out one piece connection piece 54: arc-shaped cut | disconnected bipartite piece

64: arc-shaped incision connection

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact spring device inside a color cathode ray tube, and more particularly, to an inner shield for replacing a function of a contact spring using an inner shield inside a color cathode ray tube. It relates to the contact spring device used.

For the main assembly parts used for sealing the panel and funnel of the color cathode ray tube, refer to the structural drawing of the color cathode ray tube shown in FIG. (諸 元) will be described as follows.

1. SHADOW MASK (4): Only the red fluorescent surface is visible at the deflection center of the red beam (BEAM), only the green fluorescent surface is visible at the deflection center of the green beam, and only the blue fluorescent surface is visible at the deflection center of the blue beam.

In this way, each of the corresponding fluorescent surfaces is covered by a mask, and the name is named for this reason. As one of the most important components of the color cathode ray tube, color discrimination that can be matched with the monochrome cathode ray tube (色 選 別; RED, GREEN, BLUE).

The flat plate shadow mask is a method of corrosion that uses photolithography to drill hundreds of thousands of holes on its surface to pass each electron beam through it, and the machined flat plate shadow mask is pressed to have its function. After a predetermined curvature processing, the assembly is completed and fixed to the stud pin (STUD PIN) 13 of the inner edge surface of the panel 14 by three to four springs.

The shadow mask 4 thus made has an electron beam transmittance of about 15 to 18% at the center of the hole, and the rest is lost as heat. And the cross-sectional shape of the hole is tapered (TAPER: both sides of the article are symmetrically inclined) to prevent the scattering of the electron beam, and the material is a rimmed steel, aluminum kill ALUMINUM KILLED STEEL, INVAR STEEL, etc. are used.

2. FRAME (3): The shadow mask (4) is fixed by welding to a certain frame so that the original shape can be maintained, the outside dimension or the burnout of the assembly as the role of the frame燒: There should be almost no morphological change after implementation to soften the metal material and remove internal stress.

After cold-rolled steel sheet is processed into a mold by a predetermined dimension in a press, it is finished by surface processing as a fine metal ball to remove the processing burr, etc. generated during processing. It is.

3. Hook (18): When power is applied to the color cathode ray tube, the shadow mask (4) assembly is thermally expanded by the kinetic energy of hot electrons which are dead from the electron gun from about 3 minutes to 90 minutes. (THERMAL DRIFT) causes convexity (so-called shadow mask doming phenomenon), and the landing of the electron beam (LANDING: the electron beam irradiates the respective fluorescent planes, precisely the purity of the ground color Improves), the thermal expansion rate of the shadow mask (4) is corrected by the hook (18) by the bi-metal (BI-METAL) action, the chemical composition of the high expansion portion Fe-Ni-Cr The low expansion portion is made of Fe-36% Ni.

4. Spring (17): It serves to secure the assembly of the shadow mask (4) and the frame (3) to the stud pin (12) inside the panel (14), recently in the function of the spring (17) Further, spring characteristics after assembly are important, and the machining accuracy of the spring (e.g., concentricity and dimensional accuracy, drag on the machined hole contact surface, bent height, etc.) is more strictly required.

The processing of the spring 17 is completed by forming a 18 Cr-8 Ni stainless steel plate by pressing and then surface treatment, the material is made of SUS 304.

5. INNER SHIELD (9): In the color cathode ray tube, an electron beam shifts and diffuse reflection occurs due to the influence of geomagnetism. A thin metal plate is attached inside the color cathode ray tube to reduce the influence of geomagnetism. do. The inner shield 9 used at this time is made of Fe-P.

6. ELECTRON SHIELD (2): Since the overscan is 105 to 107% while the color cathode ray tube is applied, the electron beam enters the outside of the frame 3 and the fluorescent film 1 ) there is a light emitting tasaek (他色) in which, and for the purpose of blocking the outer electron, and the chemical composition a ₂ P ₃ - is 0.

7. Contact Spring (CONTACT SPRING) 12: The electron beam arriving at the fluorescent film 1 emits the phosphor. The remaining electrons at this time interfere with the landing of the normal electron beam, that is, the charging of the remaining electron beams on the fluorescent film 1 interferes with the landing of the subsequent electron beams. To the outside of the color cathode ray tube (ANODE), the material is a stainless steel plate, the movement of the electron is screen → black matrix (BLACK MATRIX) → deposited graphite → stud pin → frame → contact spring → funnel built-in graphite → ANODE.

8. INNER SHIELD CLIP 32: The inner shield 9 and the contact spring 12 are fixed to the frame 3.

The process of joining and assembling the panel member and the funnel member of the color cathode ray tube using the components as described above is as follows.

As shown in FIG. 2, a fluorescent film 21 is applied, and a shadow mask 24 is introduced into a panel 22 having three stud pins 23 provided on a rectangular inner edge surface thereof. The welded frame 25 is inserted at a predetermined distance (Q VALUE: 5 to 20 mm) from the fluorescent film 21, where the stud pins 23 are formed on the outer edge surface of the rectangular frame 25. Three hooks 26 and springs 27 corresponding to the spring are integrally welded together so that the stud pins 23 in the frame 25 and the panel 22 are provided through the coupling holes 28 of the springs 27. ) Is assembled.

Subsequently, the four frame coupling holes 29 provided in the center of each long and short edge of the upper surface of the rectangular frame 25 and the rectangular inner shield 35 assembled on the upper portion of the lower surface of the rectangular frame 25 are provided. Through the inner shield coupling holes 33 provided at the center of each short and long edge edge, the inner shield clip 32 couples the frame 25 and the inner shield 35, where 1 to 3 is typically used. Two contact springs 31 are inserted between the inner shield coupling hole 33 and the frame coupling hole 29 using the coupling holes 30 thereof, resulting in the frame 25, the contact spring 31 and the inner. Shield 34 will be combined together in order. At this time, the contact spring 31 is electrically connected to the internal graphite in the funnel 36 by the elastic force.

After the above assembly is completed, the panel and the funnel are finally sealed to form a bulb BULB.

At this time, in the conventional bulb manufacturing process as described above, in order to discharge the electrons charged in the fluorescent film 21 to the outside it is necessary to make a separate manufacturing of the contact spring 31, which is the addition of the component assembly process and There was a problem that the increase in cost.

An inner shield of a conventional color cathode ray tube with a contact spring to solve this problem is shown in FIG.

Referring to FIG. 3, the inner shield of the conventional color cathode ray tube having a contact spring is formed by cutting a portion of the body of the inner shield 35 to protrude from the inner shield 35 so as to protrude from the inner shield 35. 37) is prepared.

However, as described above, providing a contact spring by cutting and protruding any portion of the inner shield body brings about a non-uniform shielding of the geomagnetic field, which causes a problem in that image reproducibility of the color cathode ray tube becomes difficult.

SUMMARY OF THE INVENTION In order to solve such a problem, an object of the present invention is to provide a color cathode ray tube having a contact spring device using an inner shield that can uniformly shield the geomagnetic and maintain image reproducibility of the color cathode ray tube.

In order to achieve the above object, the present invention provides a panel to which a fluorescent film is applied, a frame on which a shadow mask supported by the panel is maintained at a predetermined distance from the fluorescent film, and an inner for shielding the geomagnets thereon. A color cathode ray tube comprising a shield and a bypass means for cutting a portion of the body of the inner shield and electrically connecting the internal graphite inside the funnel to discharge electrons charged in the fluorescent film to an anode. The bypass means provides an arc-shaped cutout that wraps around the inner shield clip fixing portion formed at the center of the long edge side of the rectangular inner shield, and the arc-shaped connecting piece cut out. It includes an arc-shaped connecting piece electrically connected to the internal graphite inside the funnel and discharged to the electron anode filled in the fluorescent film It characterized.

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

Example 1

Figure 4 shows a contact spring device using the inner shield according to the present invention, which is formed in the inner shield clip fixing portion 40 and the inner shield coupling hole (center) formed in the center of each short side edge of the lower surface of the rectangular inner shield 38 ( 39) and the connecting piece 41 of the arc-shaped cutout which wraps around the said rectangular inner shield clip fixing part 40. As shown in FIG.

The operation of the color cathode ray tube having the contact spring device using the inner shield according to the present invention configured as described above is as follows.

The arc-shaped connecting piece 41 provided at the arc-shaped cutout portion surrounding the inner shield clip fixing part 40 formed at the center of each short and short edge of the lower surface of the rectangular inner shield 38 is elastically embedded in the internal graphite inside the funnel. The upper end of the cut arc-shaped connecting piece 41 is bent at a predetermined angle so as to be connected and connected.

In this way, the cut arc-shaped connecting piece 41 is electrically connected and connected to the embedded graphite inside the funnel.

Thus, the cut arc-shaped connection piece 41 is provided around the inner shield clip fixing part 40 to uniformly shield the geomagnetism, thereby effectively preventing movement and diffuse reflection of the electron beam emitted from the electron gun to maintain image reproducibility. A charged electron beam that arrives at the fluorescent film, emits the phosphor, and then remains and interferes with the normal landing of the subsequent electron beam, which is the shape of the fluorescent film → black matrix → deposited graphite → stud pin → frame → inner shield. It is discharged to the outside of the color cathode ray tube along the path of the connecting piece → the internal graphite inside the funnel → the anode.

Example 2

5 shows a contact spring device using the inner shield according to the present embodiment, which is a predetermined portion surrounding the inner shield clip fixing part 44 formed at the center of each short and short edge of the lower surface of the rectangular inner shield 42. It is characterized in that it is provided as an integral connection piece 45 in which the incision is integrally formed, the function and action are the same as in the first embodiment.

Example 3

6 shows a contact spring device using the inner shield according to the present embodiment, which splits the upper end of the arc-shaped connection piece 41 cut in the first embodiment to the internal graphite inside the funnel. As the binary connection piece 54 connected, the electron moving passage is divided, and its function and action are the same as those of the first embodiment.

Example 4

7 shows a contact spring device using an inner shield according to the present embodiment, which cuts one end of the cut arc-shaped connecting piece 41 in the first embodiment and pulls it in one direction. It is characterized in that the straight connection piece 64 extending the length of the arc-shaped connection piece by twisting (TWIST), which is used when the distance between the inner shield 61 and the internal graphite inside the funnel is large, Functions and actions are the same as in Example 1.

The present invention is not limited to the incision of some quadrangles surrounding the inner shield clip fixing portion formed at the center of each short and short edge of the rectangular inner shield as in the above embodiment, and can be applied to a partial incision of the entire quadrilateral.

As described above, the present invention provides a color cathode ray tube having a contact spring device using an inner shield that can uniformly shield the geomagnetic and maintain image reproducibility of the color cathode ray tube.

Claims (4)

A panel coated with a fluorescent film, a frame welded with a shadow mask supported by the panel at a predetermined distance from the fluorescent film, an inner shield for shielding the geomagnetism thereon, and a portion of the body of the inner shield is cut out. In the color cathode ray tube which is processed and electrically connected to the internal graphite inside the funnel to discharge the electrons charged in the fluorescent film to the anode, the bypass means is the rectangular inner shield ( An arc-shaped cutout is formed around the inner shield clip fixing part 40 formed at the center of the long-edge edge of 38), and the cut arc-shaped connecting piece 41 is electrically connected to the internal graphite inside the funnel 36 to form a fluorescent film. A contact spring using an inner shield comprising an arc-shaped connection piece 41 for discharging electrons charged in the anode; Color cathode ray tube having value. The contact spring device using an inner shield according to claim 1, wherein the arc-shaped cutout portion is formed of an integral connection piece 45 in which a predetermined portion surrounding the inner shield clip fixing portion 44 is integrally cut. Having a color cathode ray tube. The inner shield as set forth in claim 1, wherein the arc-shaped cutout portion is formed of a bisecting connecting portion 54 dividing an upper end of the cut arc connecting piece of the rectangular inner shield 51 and dividing an electron moving passage. Color cathode ray tube with contact spring device used. The straight connection piece 64 according to claim 1, wherein the arc-shaped cutout portion cuts one end of the cut arc-shaped connection piece of the rectangular inner shield 61, pulls it out in one direction, and twists it to extend the length of the arc-shaped connection piece. Color cathode ray tube having a contact spring device using an inner shield, characterized in that provided.