JPH0427091Y2 - - Google Patents
Info
- Publication number
- JPH0427091Y2 JPH0427091Y2 JP4555787U JP4555787U JPH0427091Y2 JP H0427091 Y2 JPH0427091 Y2 JP H0427091Y2 JP 4555787 U JP4555787 U JP 4555787U JP 4555787 U JP4555787 U JP 4555787U JP H0427091 Y2 JPH0427091 Y2 JP H0427091Y2
- Authority
- JP
- Japan
- Prior art keywords
- welded
- crimp
- molybdenum foil
- external lead
- filament
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 27
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 20
- 229910052750 molybdenum Inorganic materials 0.000 claims description 20
- 239000011733 molybdenum Substances 0.000 claims description 20
- 239000011888 foil Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 238000007789 sealing Methods 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、バルブの端部が圧着封止された白熱
電球に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an incandescent light bulb in which the end of the bulb is crimped and sealed.
例えば管形の圧着封止型白熱電球は、第１図に
示すように、石英ガラス製のバルブ１の両端に圧
着封止部１１が形成され、この圧着封止部１１に
モリブデン箔２が埋設されている。バルブ１の管
軸に沿つて配置されたタングステンフイラメント
３の両端より伸びる内部リード線４の端部がモリ
ブデン箔２の一端に溶接されており、外部リード
棒５は、モリブデンなどの高融点金属からなる
が、その端部がモリブデン箔２の他端に溶接さ
れ、圧着封止部１１から外に伸び出している。そ
して、両外部リード棒５間に通電すると、フイラ
メント３が発光する。
For example, in a tube-shaped crimp-sealed incandescent light bulb, as shown in FIG. has been done. The ends of an internal lead wire 4 extending from both ends of a tungsten filament 3 arranged along the tube axis of the valve 1 are welded to one end of the molybdenum foil 2, and the external lead rod 5 is made of a high melting point metal such as molybdenum. However, its end portion is welded to the other end of the molybdenum foil 2 and extends outward from the crimp sealing portion 11. When electricity is applied between both external lead rods 5, the filament 3 emits light.
かかる構成の圧着封止型白熱電球を製造する際
は、フイラメント３の両端より伸びる内部リード
線４と外部リード棒５の端部を予めモリブデン箔
２に溶接してフイラメント組立体を形成し、この
フイラメント組立体を管形のバルブ１内に管軸に
沿つて挿入する。そして、モリブデン箔２に対応
する部位のバルブ１を高温に加熱して軟化させ、
プレスして偏平な圧着封止部１１を形成し、その
内部にモリブデン箔２を埋設封止している。この
圧着封止部１１を形成するピンチシール工程にお
いて、石英ガラス製のバルブ１を軟化させるため
に、バーナーにて2500℃程度に加熱して数秒間保
持している。従つて、この高温度で保持している
間にバルブ１内部に位置する外部リード棒５も高
温になるが、更に、プレスしてピンチシールする
ときに、0.1秒程度の短時間ではあるが、軟化し
た高温の石英ガラスが大きな圧力で圧着した状態
で保持される。このため、外部リード棒５の先端
部分は1400℃程度までも温度が上がることがあ
り、外部リード棒５が石英ガラスに溶着すること
がある。そして、外部リード棒５が石英ガラスに
溶着すると、冷却時において、外部リード棒５を
構成するモリブデン等の高融点金属とバルブ１の
石英ガラスの熱収縮量の相違によつて、第２図に
示すように、圧着封止部１１にクラツク１２が発
生する。従つて、このクラツク１２のために、圧
着封止部１１の強度が著しく低下し、外部リード
棒５に少し外力が加わると破損してしまう問題点
がある。 When manufacturing a crimp-sealed incandescent lamp having such a configuration, the ends of the internal lead wire 4 and the external lead rod 5 extending from both ends of the filament 3 are welded to the molybdenum foil 2 in advance to form a filament assembly. The filament assembly is inserted into the tubular valve 1 along the tube axis. Then, the part of the bulb 1 corresponding to the molybdenum foil 2 is heated to a high temperature to soften it,
A flat crimp-sealed portion 11 is formed by pressing, and molybdenum foil 2 is embedded and sealed inside the flat crimp-sealed portion 11. In the pinch sealing process for forming the pressure-bonded sealing portion 11, the quartz glass bulb 1 is heated to about 2500° C. with a burner and held for several seconds in order to soften it. Therefore, while the temperature is maintained at this high temperature, the external lead rod 5 located inside the valve 1 also becomes high in temperature. The softened high-temperature quartz glass is held in a pressed state under great pressure. Therefore, the temperature at the tip of the external lead rod 5 may rise to about 1400° C., and the external lead rod 5 may be welded to the quartz glass. When the external lead rod 5 is welded to the quartz glass, during cooling, due to the difference in the amount of thermal contraction between the high melting point metal such as molybdenum that constitutes the external lead rod 5 and the quartz glass of the bulb 1, as shown in FIG. As shown, a crack 12 occurs in the crimp-sealed portion 11. Therefore, due to the crack 12, the strength of the crimp sealing portion 11 is significantly reduced, and there is a problem that the external lead rod 5 may be damaged if a slight external force is applied thereto.
そこで本考案は、圧着封止部を形成する際に、
外部リード棒が石英ガラスに溶着せず、寿命が長
くて圧着封止部の強度も大きい圧着封止型白熱電
球を提供することを目的とするものである。
Therefore, in the present invention, when forming the crimp sealing part,
It is an object of the present invention to provide a crimp-sealed incandescent light bulb in which an external lead rod is not welded to quartz glass, has a long life, and has a high strength crimp-sealed portion.
本考案の圧着封止型白熱電球は、フイラメント
と、このフイラメントより伸びる内部リード線に
一端が溶接されたモリブデン箔と、このモリブデ
ン箔の他端に溶接され、この溶接部に炭素粉末が
塗布された外部リード棒とよりなるフイラメント
組立体がバルブ内に挿入され、モリブデン箔に対
応する部位のバルブが圧着封止されてなることを
特徴とする。
The crimp-sealed incandescent light bulb of the present invention includes a filament, a molybdenum foil whose one end is welded to an internal lead wire extending from the filament, and a molybdenum foil welded to the other end of the molybdenum foil, and carbon powder is applied to this welded part. A filament assembly consisting of an external lead rod is inserted into the valve, and the portion of the valve corresponding to the molybdenum foil is crimped and sealed.
すなわち、外部リード棒のモリブデン箔に溶接
された溶接部に炭素粉末が塗布されているので、
ピンチシール工程において、外部リード棒が最も
高温になる該溶接部が石英ガラスに直接接触しな
い。従つて、外部リード棒が石英ガラスに溶着せ
ず、圧着封止部にクラツクが発生しない。 In other words, carbon powder is applied to the welded part of the external lead rod's molybdenum foil.
In the pinch sealing process, the welded part where the external lead rod reaches its highest temperature does not come into direct contact with the quartz glass. Therefore, the external lead rod will not be welded to the quartz glass, and no cracks will occur in the crimp-sealed portion.
以下に図面に示す実施例に基いて本考案を具体
的に説明する。
The present invention will be specifically described below based on embodiments shown in the drawings.
本実施例の基本構成は、第１図に示す通りであ
るが、フイラメント３の両端より伸びる内部リー
ド線４と外部リード棒５の端部を予めモリブデン
箔２に溶接されたフイラメント組立体をバルブ１
に挿入する前に、第３図と第４図に示すように、
外部リード棒５の外周面に炭素粉末が塗布され、
炭素粉末被膜６が形成されている。この炭素粉末
被膜６は、炭素の微粉末をバインダーを含んだ水
溶液に分散させ、この溶液を筆塗りや印刷などに
よつて塗布し、乾燥させたものであるが、膜厚は
1μm程度あればよい。また、炭素の微粉末は、燃
料の不完全燃焼により発生した「スス」であつて
もよい。そして、この炭素粉末被膜６が形成され
ている部位は、外部リード棒５の先端部であつ
て、モリブデン箔２に溶接された溶接部５１であ
り、ピンチシール工程において最も高温になる部
分である。なお、図示していないが、モリブデン
箔２の表面（外部リード棒５が溶接された面の裏
面）にも同様の炭素粉末被膜６を形成しておいて
もよい。 The basic configuration of this embodiment is as shown in FIG. 1, and a filament assembly is constructed by welding the ends of an internal lead wire 4 extending from both ends of a filament 3 and an external lead rod 5 to a molybdenum foil 2 in advance. 1
As shown in Figures 3 and 4, before inserting the
Carbon powder is applied to the outer peripheral surface of the external lead rod 5,
A carbon powder coating 6 is formed. This carbon powder coating 6 is made by dispersing fine carbon powder in an aqueous solution containing a binder, applying this solution by brush painting or printing, and drying it.
Approximately 1 μm is sufficient. Further, the fine carbon powder may be "soot" generated by incomplete combustion of fuel. The part where this carbon powder coating 6 is formed is the tip of the external lead rod 5, which is the welded part 51 welded to the molybdenum foil 2, and is the part that becomes the highest temperature in the pinch sealing process. . Although not shown, a similar carbon powder coating 6 may also be formed on the surface of the molybdenum foil 2 (the back surface of the surface to which the external lead rod 5 is welded).
しかして、かかる構成のフイラメント組立体が
バルブ１の軸線に沿つて挿入され、前述のとお
り、ピンチシール工程によつて圧着封止部１１が
形成されるが、外部リード棒５が高温の石英ガラ
スに圧着する際に炭素粉末被膜６が介在し、直接
接触しないので、石英ガラスに溶着せず、圧着封
止部１１にクラツク１２が発生しない。 The filament assembly having such a configuration is inserted along the axis of the bulb 1, and the crimp sealing part 11 is formed by the pinch sealing process as described above. Since the carbon powder coating 6 is interposed and there is no direct contact when crimping the quartz glass, no cracks 12 are generated in the crimped sealing portion 11 without being welded to the quartz glass.
以上説明したように、本考案の圧着封止型白熱
電球は、ピンチシール工程の前に、外部リード棒
の端部であつて、モリブデン箔に溶接された溶接
部に炭素粉末が塗布されているので、ピンチシー
ル工程において、外部リード棒が石英ガラスに溶
着してクラツクが発生せず、寿命が長くて圧着封
止部の強度も大きい圧着封止型白熱電球とするこ
とができる。
As explained above, in the crimp-sealed incandescent light bulb of the present invention, carbon powder is applied to the end of the external lead rod, which is welded to the molybdenum foil, before the pinch sealing process. Therefore, in the pinch sealing process, a crimp-sealed incandescent lamp that does not cause cracks due to welding of the external lead rod to the quartz glass, has a long life, and has a strong crimp-sealed portion can be obtained.
第１図は圧着封止型白熱電球の平面図、第２図
は従来例の断面図、第３図と第４図は本考案実施
例の要部断面図である。
１……バルブ、１１……圧着封止部、１２……
クラツク、２……モリブデン箔、３……フイラメ
ント、４……内部リード線、５……外部リード
棒、５１……溶接部、６……炭素粉末被膜。
FIG. 1 is a plan view of a crimp-sealed incandescent light bulb, FIG. 2 is a sectional view of a conventional example, and FIGS. 3 and 4 are sectional views of essential parts of an embodiment of the present invention. 1...Valve, 11...Crimp sealing part, 12...
crack, 2... molybdenum foil, 3... filament, 4... internal lead wire, 5... external lead rod, 51... welded part, 6... carbon powder coating.
Claims (1)
内部リード線に一端が溶接されたモリブデン箔
と、このモリブデン箔の他端に溶接され、この溶
接部に炭素粉末が塗布された外部リード棒とより
なるフイラメント組立体がバルブ内に挿入され、
モリブデン箔に対応する部位のバルブが圧着封止
されてなる圧着封止型白熱電球。 A filament assembly consists of a filament, a molybdenum foil whose one end is welded to an internal lead wire extending from the filament, and an external lead rod welded to the other end of the molybdenum foil and whose welded part is coated with carbon powder. inserted into the valve,
A crimp-sealed incandescent light bulb in which the bulb in the corresponding part of the molybdenum foil is crimped and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4555787U JPH0427091Y2 (en) | 1987-03-30 | 1987-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4555787U JPH0427091Y2 (en) | 1987-03-30 | 1987-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153471U JPS63153471U (en) | 1988-10-07 |
| JPH0427091Y2 true JPH0427091Y2 (en) | 1992-06-29 |
Family
ID=30864399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4555787U Expired JPH0427091Y2 (en) | 1987-03-30 | 1987-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0427091Y2 (en) |
-
1987
- 1987-03-30 JP JP4555787U patent/JPH0427091Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153471U (en) | 1988-10-07 |
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