KR900005803B1 - Rounding insulating fixing method of cathode instructure - Google Patents

Rounding insulating fixing method of cathode instructure Download PDF

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KR900005803B1
KR900005803B1 KR1019860003492A KR860003492A KR900005803B1 KR 900005803 B1 KR900005803 B1 KR 900005803B1 KR 1019860003492 A KR1019860003492 A KR 1019860003492A KR 860003492 A KR860003492 A KR 860003492A KR 900005803 B1 KR900005803 B1 KR 900005803B1
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cathode
annular insulator
negative electrode
insulator
support
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KR1019860003492A
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Korean (ko)
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KR870011651A (en
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이경상
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주식회사 금성사
구자학
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/15Cathodes heated directly by an electric current
    • H01J1/18Supports; Vibration-damping arrangements

Abstract

The inner surface of the cylindrical insulator (2) is coated with a metal layer (20) which has a similar thermal expansion coefficient to the electrode supporter (1) and its material is mixture of Mn and Mo powders. After fixing the insulator to the top of the supporter, a binding alloy of Ag and Cu is coated between the outer surface of the supporter and inner surface of the metal layer, them heated at 850 degree under inert atmosphere to melt the both surfaces so that the insulator is fixed tightly on the supporter.

Description

음극구조체의 환상 절연체 고정방법How to fix annular insulator of cathode structure

제1도는 종래의 음극 구조체의 주변 구성을 보인 종단면도.1 is a longitudinal sectional view showing a peripheral configuration of a conventional cathode structure.

제2도는 종래의 환상 절연체의 구성을 보인 종단면도.2 is a longitudinal sectional view showing a configuration of a conventional annular insulator.

제3도는 본 발명에 따른 환상 절연체의 구성을 보인 분해 사시도.3 is an exploded perspective view showing the configuration of the annular insulator according to the present invention.

제4도는 제3도의 결합상태의 종단면도.4 is a longitudinal sectional view of the coupled state of FIG.

제5도는 본 발명에 따른 음극구조체의 주변 구성을 보인 종단면도.Figure 5 is a longitudinal cross-sectional view showing a peripheral configuration of the cathode structure according to the present invention.

제6도는 제5도의 음극주변 온도 분포도.6 is a temperature distribution diagram around the cathode of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 음극지지체 2 : 환상 절연체1: cathode support 2: annular insulator

2a : 금속막2a: metal film

본 발명은 음극선관내의 후방에 설치되어 전방의 형광스크린상에 전자빔을 발사하는 음극선관용 전자총에 있어서, 음극구조체를 지지하는 음극지지체에 환상 절연체를 고정하는 음극구조체의 환상 절연체 고정방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing an annular insulator of a cathode structure in which an electron gun for a cathode ray tube installed at a rear side of a cathode ray tube to emit an electron beam on a fluorescent screen in front of the cathode tube is fixed to a cathode support supporting a cathode structure.

일반적으로 사용되는 음극선관용 음극구조체의 주변 구성을 제1도에 의하여 설명하면, 하측단부가 음극홀더(3)에 지지되고 내부에 히이터(4)가 설치된 슬라이브(5)의 선단부에 전자방사물질인 산화물(6)이 도포된 캡(7)을 씌워서 된 음극구조체를 제2도에 도시한 바와같이 상부 일정부위에 걸림턱(1a)이 형성된 음극지지체(1)에 환상 절연체(2)를 삽입하고 음극지지체(1)의 선단부를 확개하여 고정시켜서 하측면이 음극홀더(3)의 외주면에 접촉하게 하여 전방에 전자빔 통과공(8a)이 형성된 제1전극(8)의 내측에 삽입 고정하도록 된 구조이다.Referring to FIG. 1, a peripheral configuration of a cathode structure for a cathode ray tube generally used is provided with an electron-emitting material at a tip end of a slave 5 having a lower end supported by a cathode holder 3 and a heater 4 installed therein. The annular insulator 2 is inserted into the negative electrode support 1 having the latching jaw 1a formed at a predetermined upper portion, as shown in FIG. 2, by covering the cap 7 coated with the phosphor oxide 6. And the front end of the cathode support 1 is extended and fixed so that the lower side is in contact with the outer circumferential surface of the cathode holder 3 so as to be inserted and fixed inside the first electrode 8 having the electron beam through hole 8a formed thereon. Structure.

이와같은 구조를 갖는 음극구조체는 출하시간 즉, 히이터(4)에 전원이 인가되어 방출된 전자빔에 의하여 스크린상에 화상이 나타나게 되는데에 소요되는 시간을 단축시키기 위하여 슬라이브(5)의 재질은 니켈과 크롬의 합금을 사용하며 습식 수소로에서 흑화처리의 공정을 거치게 되는데 이때의 온도는 약 1,000℃에 달하게 된다.The cathode structure having such a structure is made of nickel 5 in order to shorten the shipping time, that is, the time required for the image to appear on the screen by the electron beam emitted by the heater 4. It uses an alloy of and chromium and undergoes a process of blackening in a wet hydrogen furnace, where the temperature reaches about 1,000 ° C.

음극지지체(1)에 환상 절연체(2)를 고정할 때에는 음극지지체(1)의 상부로부터 환상 절연체(2)를 삽입하여 일정부위에 형성된 걸림턱(1a)에 환상 절연체(2)가 걸리게 한 후 음극지지체(1)의 선단부에 압력을 가하여 확개를 시켜서 크램핑 작업으로 고정하였다. 그러나 이와같은 종래의 고정방법은 음극지지체(1)를 제작시 상부에 별도의 걸림턱(1a)을 형성하여야 하므로 그 제작공정이 복잡해지고, 환상 절연체(2)를 삽입하여 음극지지체(1)의 선단부에 압력을 가할시 환상 절연체(2)에 크랙이 발생할 가능성이 높을 뿐만 아니라, 또한 음극지지체(1)의 중심선(AA)과 환상절연체(2)의 평면(BB)사이에 정확히 유지되어야 할 직각도(R)에 편차가 발생하게 되어 음극선관의 전자방사특성에 열화를 가져온다.When fixing the annular insulator 2 to the negative electrode support 1, insert the annular insulator 2 from the upper part of the negative electrode support 1 so that the annular insulator 2 is caught by the latching jaw 1a formed at a predetermined position. Pressure was applied to the tip of the negative electrode support 1 to expand and fix it by clamping operation. However, in the conventional fixing method, a separate hooking jaw 1a must be formed on the upper part of the negative electrode support 1 during manufacture, and the manufacturing process is complicated, and the annular insulator 2 is inserted into the fixing method of the negative electrode support 1. When pressure is applied to the tip, not only the crack is likely to occur in the annular insulator 2, but also the right angle to be accurately maintained between the center line AA of the cathode support 1 and the plane BB of the annular insulator 2. Deviation occurs in the drawing (R), resulting in deterioration of the electron radiation characteristics of the cathode ray tube.

본 발명은 이와같은 종래 고정방법의 결합을 해소하기 위하여 창안한 것으로, 환상 절연체의 내주면에 몰리브덴(Mo)과 망간(Mn)의 혼합물질로 된 금속막을 형성하고 금속접합방법을 이용하여 음극지지체에 환상절연체를 고정할 수 있게 한 것이 본 발명의 특징이다.The present invention was devised to solve the combination of the conventional fixing method, and formed a metal film of a mixture of molybdenum (Mo) and manganese (Mn) on the inner circumferential surface of the annular insulator, and using a metal bonding method to the cathode support It is a feature of the invention that the annular insulator can be fixed.

이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.

제3도 내지 제5도에 도시한 바와같이 공지 음극선관용 전자총의 음극지지체(1선단부에 환상 절연체(2)가 고정되는 것에 있어서, 상기 환상 절연체(2)의 내주면에 Mn(15-20%Wt%)의 분말(3㎛ 이하)과 Mo의 분말을 혼합하여 접착제로서 유기고착제를 혼합한 혼합물질로 급속막(두께 20-30㎛)(2a)을 형성한 다음 소각시켜 유기고착제를 제거하고, 금속막(2a)의 표면에 다시 Ni(두께 2-6㎛)을 입혀서 금속막(2a)의 산화를 보호하며, 이와같이 된 환상 절연체(2)를 음극지지체(1)의 선단부에 결합시키고 음극지지체(1)의 외주면과 환상절연체(2)의 금속막(2a)사이에 접합용 합금(72Wt.%Ag와 28Wt.% Cu의 합금)을 이용하여 환원성 불활성 분위기에서 약 850℃의 온도로 용융시켜 금속접합방법으로 고정할 수 있도록 한 것이다.As shown in FIGS. 3 to 5, the cathode support of a known cathode ray tube electron gun (in the case where the annular insulator 2 is fixed to the first end, Mn (15-20% Wt) on the inner circumferential surface of the annular insulator 2 %) Powder (3 μm or less) and Mo powder are mixed to form a rapid membrane (thickness 20-30 μm) (2a) with a mixture of organic adhesives as an adhesive, followed by incineration to remove organic binders, Ni (thickness 2-6 μm) is applied to the surface of the metal film 2a again to protect oxidation of the metal film 2a, and the annular insulator 2 thus bonded is joined to the tip of the negative electrode support 1 and the negative electrode support is supported. Between the outer circumferential surface of (1) and the metal film (2a) of the annular insulator (2) using a bonding alloy (alloy of 72 Wt.% Ag and 28Wt.% Cu) was melted at a temperature of about 850 ℃ in a reducing inert atmosphere It is to be fixed by metal bonding method.

이와같은 방법을 적용하는 경우에 음극지지체(1)의 재질은 항상 절연체(2)와 열팽창계수가 비슷한 재질(54Wt.% Fe와 29Wt.% Ni 및 17Wt.% Co의 합금)을 사용하는 것이 좋다.In this case, the material of the cathode support 1 should always be made of a material having a similar coefficient of thermal expansion to the insulator 2 (alloy of 54 Wt.% Fe and 29 Wt.% Ni and 17 Wt.% Co). .

또한 환상절연체(2)와 음극지지체(1)의 열팽창차이가 클 경우 고온 냉각시 접합부에서 균열이 발생되기 쉬우므로 상기 금속막(2a)은 열팽창계수가 음극지지체(1)의 열팽창계수와 거의 비슷한 것이 바람직하다.In addition, if the thermal expansion difference between the annular insulator 2 and the cathode support 1 is large, cracks are likely to occur at the junction during high temperature cooling, and thus the metal film 2a has a coefficient of thermal expansion almost similar to that of the cathode support 1. It is preferable.

또한, 음극선관 제조시 음극의 온도의 가장 높은 공정은 음극활성화 공정으로 히이터(4)의 상부의 온도가 약 1,000℃에 달하게 된다. 이때 음극표면의 최고온도는 400℃정도가 되며 환상 절연체에 미치는 온도는 음극과 음극지지체간의 간격이 0.8-1.2mm로 유지되기 때문에 음극표면의 온도 400℃보다 낮게 되며, 따라서 환상절연체(2)와 음극지지체(1)의 접합 작업온도가 850℃이상이 되어야 하는 점을 고려해 본다면 활성화시에 환상 절연체에는 영향을 미치지 아니한다. 즉, 이것을 그래프로 표현하면 첨부 도면의 제6도와 같이 도시되며, 이는 음극의 주변에 발생되는 온도분포도를 나타낸 것으로, 도표에서 a는 제5도를 기준으로 하여 정상적으로 히이터의 가동시 음극표면의 온도분포를 나타낸 것이며, b는 음극활성화시 음극표면의 온도분포를 나타낸 것이다.In addition, the highest temperature of the cathode temperature during the cathode ray tube manufacturing process is a cathode activation process so that the temperature of the upper portion of the heater 4 reaches about 1,000 ° C. At this time, the maximum temperature of the negative electrode surface is about 400 ℃ and the temperature on the annular insulator is lower than the temperature of the negative electrode surface 400 ℃ because the distance between the negative electrode and the negative electrode support is maintained at 0.8-1.2mm, thus the annular insulator (2) and Considering that the junction working temperature of the negative electrode support 1 should be 850 ° C. or higher, it does not affect the annular insulator upon activation. In other words, this is shown in a graph as shown in FIG. 6 of the accompanying drawings, which shows a temperature distribution generated around the cathode, where a is the temperature of the cathode surface when the heater is normally operated on the basis of FIG. B shows the temperature distribution of the surface of the cathode when the cathode is activated.

이와같이 본 발명의 고정방법을 사용하여 음극지지체에 환상 절연체를 고정하게 되면 음극지지체의 선단부에 별도의 걸림턱을 형성할 필요가 없게되어 음극지지체의 제조공정을 단순화할 수 있고 크램핑작업으로 인하여 환상절연체에 발생할 수 있는 크랙의 발생염려가 없을 뿐만 아니라 음극지지체의 중심선(AA)과 환상 절연체의 평면(BB)사이에 유지되어야 하는 직각도(R')를 정화히 조정할 수 있게 되어 전자방사 특성의 영향을 기할 수 있게 되는 이점이 있다.As described above, when the annular insulator is fixed to the cathode support by using the fixing method of the present invention, it is not necessary to form a separate latching jaw at the tip of the cathode support, which simplifies the manufacturing process of the anode support and is annular due to the clamping operation. In addition to the possibility of cracks occurring in the insulator, the squareness (R ') that must be maintained between the center line (AA) of the cathode support and the plane (BB) of the annular insulator can be adjusted cleanly so that the effect of the electromagnetic radiation characteristics There is an advantage to be able to.

Claims (1)

음극지지체(1)의 선단부에 환상 절연체(2)를 고정시키는 음극 구조체의 환상 절연체 고정방법에 있어서, 상기 환상 절연체(2)의 내주면에 Mn의 분말과 Mo의 분말로 혼합구성됨과 아울러 열팽창계수가 음극지지체(1)와 비슷한 금속막(2a)을 형성하고, 상기 환상절연체(2)를 음극지지체(1)의 선단부에 결합시킨 상태에서 음극지지체(1)의 외주면과 환상절연체(2)의 금속막(23)의 사이에 Ag와 Cu합금으로된 접합용 합금을 이용, 환원성 불활성 분위기에서 850℃의 용융온도로 금속접합고정함을 특징으로 하는 음극 구조체의 환상 절연체 고정방법.In the method of fixing the annular insulator of the negative electrode structure to fix the annular insulator 2 to the distal end of the anode support 1, the inner circumferential surface of the annular insulator 2 is mixed with Mn powder and Mo powder and the coefficient of thermal expansion A metal film 2a similar to the negative electrode support 1 is formed, and the outer circumferential surface of the negative electrode support 1 and the metal of the annular insulator 2 are formed while the annular insulator 2 is coupled to the distal end of the negative electrode support 1. A method of fixing an annular insulator for a negative electrode structure, characterized in that a metal alloy is fixed at a melting temperature of 850 ° C. in a reducing inert atmosphere by using a joining alloy made of Ag and Cu alloy between the films 23.
KR1019860003492A 1986-05-03 1986-05-03 Rounding insulating fixing method of cathode instructure KR900005803B1 (en)

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KR900005803B1 true KR900005803B1 (en) 1990-08-11

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