KR950009932B1 - Cathode heater of electron gun for crt - Google Patents
Cathode heater of electron gun for crt Download PDFInfo
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- KR950009932B1 KR950009932B1 KR1019930005029A KR930005029A KR950009932B1 KR 950009932 B1 KR950009932 B1 KR 950009932B1 KR 1019930005029 A KR1019930005029 A KR 1019930005029A KR 930005029 A KR930005029 A KR 930005029A KR 950009932 B1 KR950009932 B1 KR 950009932B1
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- heater
- tab
- cathode
- electron gun
- welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
Description
제1도는 종래의 히이터 탭에 히이터가 용접된 상태를 나타낸 정면도.1 is a front view showing a state in which a heater is welded to a conventional heater tab.
제2a, b도는 종래 히이터 탭에 히이터가 용접되는 상태를 나타낸 측단면도와 용접 완료된 상태의 평단면도.2A and 2B are side cross-sectional views showing a state in which a heater is welded to a conventional heater tab and a planar cross-sectional view in a welded state.
제3도는 본 발명에 따른 히이터 탭을 나타낸 사시도.3 is a perspective view showing a heater tab according to the present invention.
제4도는 본 발명 히이터 탭의 제작상태를 보이는 요부 발췌 사시도.Figure 4 is an excerpt perspective view showing the manufacturing state of the heater tab of the present invention.
제5도는 본 발명의 히이터 탭에 히이터가 용접된 상태를 보이는 요부 발췌 측단면도.Figure 5 is a side cross-sectional view showing the main portion extracted the heater welded to the heater tab of the present invention.
제6도는 제5도의 A-A선 단면도이다.6 is a cross-sectional view taken along the line A-A of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 히이터(heater) 12 : (히이터의) 레그(leg)11: heater 12: leg (of heater)
13 : 히이터 탭(heater tab) 14 : 돌출부(projection)13: heater tab 14: projection
본 발명은 음극선관(陰極線菅)제조에 관한 것으로서, 더 상세하게는 전자총 어셈블리(electron gun assembly)의 캐소드(cathode)를 가열하는 히이터(heater)에 관한 것이다.BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the manufacture of cathode ray tubes, and more particularly, to a heater for heating a cathode of an electron gun assembly.
전자총 어셈블리는 전자는 방출하는 캐소드(cathode)와 방출된 전자를 집속(集束) 및 가속(加速)시켜 스크린(screen)상에 랜딩(landing)시키는 복수의 전극들로 구성된다. 캐소드가 전자를 방출하기 위해서는 이를 소정온도로 가열해야 되는 바, 이의 가열원(加熱源)으로 통상 히이터가 사용된다. 히이터는 캐소드의 동작온도(약 1000℃~1300℃)를 충분히 견딜 수 있어야 되므로 고융점(高融點) 텅스턴(W)이 사용되며, 특히 작은 직경(예를 들어 약 40㎛)의 심선이 코일(coil)형태로 권선된 것이다. 이와같이 미세한 히이터는 커넥터(connector)등에 직접 접속되기가 곤란하므로 히이터탭에 접합 지지되어 캐소드의 슬리이브(sleeve)내에 삽입되는데, 이들의 접합 방법으로는 일반적으로 접합될 모재간의 접촉저항에 의해 접합시키는 저항용접(resistance welding)법이 사용된다.The electron gun assembly consists of a cathode for emitting electrons and a plurality of electrodes for focusing and accelerating the emitted electrons and landing on a screen. In order for the cathode to emit electrons, it must be heated to a predetermined temperature, and a heater is usually used as its heating source. Since the heater must be able to withstand the cathode's operating temperature (about 1000 ℃ ~ 1300 ℃), the high melting point tungsten (W) is used. Especially, a small diameter (for example, about 40㎛) core wire It is wound in the form of a coil. Since the minute heater is difficult to be directly connected to a connector or the like, the micro heater is joined to the heater tab and inserted into the sleeve of the cathode. In the joining method, the micro heater is connected by the contact resistance between the base materials to be joined. Resistance welding is used.
제1도 및 제2도에는 이러한 종래 히이터와 히이터 탭과의 용접상태를 나타내 보였다. 즉 히이터 탭(3)의 일측면에 히이터(1)의 레크(leg ; 2)를 접촉시킨 다음 용접할 소정부위의 양측면에 각각 전극봉(4)을 위치시켜 가압과 동시에 전류를 통전시키면 히이터(1)의 레그(2)와 히이터 탭(3)과의 접촉부위에 접촉저항에 의한 열이 발생되고, 이 저항열에 의해 접합부가 용융되어 용접된다. 그런데 텅스텐 재질로 된 히이터(1)의 융점은 약 2800℃로 발생가능한 저항열, 1400℃보다 월등히 높기 때문에 히이터(1)의 레그(2)는 용융되지 않고 히이터 탭(3)만의 용융이 이루어진다. 결과적으로 제2도에 도시된 바와 같이 히이터(1)의 레그(2)가 히이터 탭(3)내로 인입(引入)된 형태로 히이터(1)와 히이터 탭(3)의 용접이 이루어지게 된다.1 and 2 show a welding state between the conventional heater and the heater tab. That is, when the leg 2 of the heater 1 is brought into contact with one side of the heater tab 3, the electrode rods 4 are placed on both sides of the predetermined portion to be welded, and the current is energized and simultaneously energized. Heat generated by contact resistance is generated at the contact portion between the leg 2 of the head 2 and the heater tab 3, and the joint is melted and welded by this resistance heat. However, since the melting point of the heater 1 made of tungsten material is much higher than the resistance heat that can be generated at about 2800 ° C. and 1400 ° C., the legs 2 of the heater 1 are not melted, but only the heater tab 3 is melted. As a result, as shown in FIG. 2, the welding of the heater 1 and the heater tab 3 is performed in such a manner that the leg 2 of the heater 1 is drawn into the heater tab 3.
이와같이 종래의 용접구조는 히이터(1)의 레그(2)가 히이터 탭(2)에 인입된 형태로 용접되므로 용접 거어드(welding girth)가 부족하여 충분한 용접강도를 발휘할 수 없게 된다. 이에 따라 히어터(1)가 작은 충격에도 쉽게 히이터 탭(3)으로부터 떨어져서 단락(short)이 발생되는 문제점이 야기되어 결과적으로 음극선관의 화질 및 신뢰성을 확보하지 못했다.As described above, in the conventional welding structure, the legs 2 of the heater 1 are welded into the heater tab 2 so that the welding girth is insufficient, so that sufficient welding strength cannot be exhibited. As a result, the heater 1 is easily separated from the heater tab 3 even with a small impact, causing short-circuit to occur, and as a result, image quality and reliability of the cathode ray tube cannot be secured.
본 발명의 목적은 상술한 종래의 문제점을 감안하여 히이터를 안정되고 견고하게 지지할 수 있는 음극선관용 전자총의 캐소드 히이터를 제공하는 것이다.DISCLOSURE OF THE INVENTION An object of the present invention is to provide a cathode heater of a cathode ray tube electron gun capable of stably and firmly supporting a heater in view of the above-described conventional problems.
이와같은 목적을 달성하기 위해 본 고안의 음극선관용 전자총은 히이터가 용접되는 히이터 탭의 용접부위에 돌출부가 형성되어 히이터와의 용접시 이 돌출부가 용융됨으로써 히이터의 레그를 감싸도록 된 것을 특징으로 한다.In order to achieve the above object, the electron gun for the cathode ray tube of the present invention is characterized in that a protrusion is formed at the welded portion of the heater tab to which the heater is welded to surround the leg of the heater by melting the protrusion when welding with the heater.
이에따라 본 발명에 의하면 히이터 탭의 돌출부에 의해 용접 거어드가 증가하게 되므로 히이터가 안정되고 견고하게 지지되어 충격등의 외부요인에 의해 단락되지 않게 되며, 결과적으로 음극선관의 화질 향상 및 신뢰성 향상에 크게 기여하게 된다.Accordingly, according to the present invention, since the welding gauze is increased by the protrusion of the heater tab, the heater is stably and firmly supported so that it is not short-circuited by external factors such as impact, and consequently, greatly improves the image quality and reliability of the cathode ray tube. Will contribute.
이하 첨부된 도면을 참조하여 본 발명의 한 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제3도에서 보는 바와 같이 본 발명에 따른 히이터 탭(13)은, 히이터(11)의 레그(12)가 용접되는 부위에 소정높이의 돌출부(14)가 형성되는데, 그 높이는 용접시 히이터(11)의 레그(12)를 감싸 용접거어드를 증가시킬 수 있는 적절한 높이가 되도록 선택된다. 또 이 돌출턱(14)의 형상은 사각단면을 가지도록 도시되어 있으나 원호형 단면 또는 그밖의 어떠한 형태라도 좋다.As shown in FIG. 3, the heater tab 13 according to the present invention has a protrusion 14 having a predetermined height formed at a portion to which the leg 12 of the heater 11 is welded, the height of which is the heater 11 during welding. The leg 12 is selected to have a suitable height to increase the welding girth. The shape of the protruding jaw 14 is shown to have a rectangular cross section, but may be an arcuate cross section or any other form.
이와같이 히이터 탭(13)에 돌출부(14)를 형성하는 방법은 여러가지가 사용될 수 있는데, 제4도를 참조하여 본 발명 히이터 탭(13)의 돌출부(14)를 형성하는 한 바람직한 방법을 살펴보면, 소정형상으로 1차 가공된 히이터 탭(13')을 성형 프레스(도시안됨)로 히이터(11)와 용접될 부위를 제외한 양측 접촉면을 가압한다. 동시에 용접될 부위의 양측면을 가압하면 소정높이의 돌축턱(14)이 형성된다.As described above, various methods of forming the protrusion 14 on the heater tab 13 may be used. Referring to FIG. 4, one preferred method of forming the protrusion 14 of the heater tab 13 of the present invention will be described. The heater tab 13 'primarily processed into a shape is pressurized on both contact surfaces except for a portion to be welded with the heater 11 by a molding press (not shown). At the same time, pressing both sides of the portion to be welded to form a projection step 14 of the predetermined height.
이와같은 구조적 특징를 가지는 본 발명의 히이터 탭(13)에 히이터(11)를 용접하는 과정을 제5도를 참조하여 살펴보면 다음과 같다.The process of welding the heater 11 to the heater tab 13 of the present invention having such a structural feature will be described with reference to FIG. 5.
먼저 히이터 탭(13)의 돌출부(14)상에 히이터(11)의 레그(12)를 접촉시킨 다음 이들의 양측에서 각각 전극봉(15)으로 가압함과 동시에 통전시키면 이들의 접촉부에서 접촉저항에 의한 열이 발생된다. 이에 따라 상대적으로 융점이 낮은 히이터 탭(13)의 돌출부(14) 부분이 용융되어 히이터(11)의 레그(12)가 그 돌출부(14)내로 인입되어 접합된다. 이와같이 용접완료된 히이터(11)는 제6도에서 보는 바와 같이 그 레그(12)가 히이터 탭(13)의 돌출부(14)에 의해 감싸이게 되어 충분한 용접거어드가 형성된다.First, the legs 12 of the heaters 11 are brought into contact with the protrusions 14 of the heater tabs 13, and then pressurized with the electrode rods 15 at both sides thereof and energized at the same time. Heat is generated. As a result, a portion of the protrusion 14 of the heater tab 13 having a relatively low melting point is melted so that the leg 12 of the heater 11 is drawn into the protrusion 14 and joined. As shown in FIG. 6, the welded heater 11 has a leg 12 enclosed by the protrusion 14 of the heater tab 13 to form a sufficient welding girder.
이상과 같이 본 발명에 의하면, 히이터가 히이터 탭의 돌출부에 의해 견고하고 안정되게 지지되므로 충격 등의 외부요인에 의해 용접부가 단락되는 불량이 발생되지 않아 용접품위가 향상된다.According to the present invention as described above, since the heater is firmly and stably supported by the protrusions of the heater tabs, a defect in which the welded portion is short-circuited by external factors such as impact does not occur, thereby improving the welding quality.
따라서 본 발명은 완성된 음극선관의 화질향상 및 신뢰성 향상에 큰 효과를 발휘하게 된다.Therefore, the present invention has a great effect on improving the image quality and reliability of the finished cathode ray tube.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930005029A KR950009932B1 (en) | 1993-03-30 | 1993-03-30 | Cathode heater of electron gun for crt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930005029A KR950009932B1 (en) | 1993-03-30 | 1993-03-30 | Cathode heater of electron gun for crt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940022625A KR940022625A (en) | 1994-10-21 |
| KR950009932B1 true KR950009932B1 (en) | 1995-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019930005029A KR950009932B1 (en) | 1993-03-30 | 1993-03-30 | Cathode heater of electron gun for crt |
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| Country | Link |
|---|---|
| KR (1) | KR950009932B1 (en) |
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1993
- 1993-03-30 KR KR1019930005029A patent/KR950009932B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR940022625A (en) | 1994-10-21 |
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