JPS6321892Y2 - - Google Patents
Info
- Publication number
- JPS6321892Y2 JPS6321892Y2 JP14717582U JP14717582U JPS6321892Y2 JP S6321892 Y2 JPS6321892 Y2 JP S6321892Y2 JP 14717582 U JP14717582 U JP 14717582U JP 14717582 U JP14717582 U JP 14717582U JP S6321892 Y2 JPS6321892 Y2 JP S6321892Y2
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- cathode body
- enclosure
- metal cap
- support rod
- 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
- 239000011521 glass Substances 0.000 claims description 41
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000005388 borosilicate glass Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【考案の詳細な説明】
本考案は金属キヤツプ方式閃光放電灯に関する
ものである。[Detailed Description of the Invention] The present invention relates to a metal cap type flash discharge lamp.
一般に金属キヤツプ方式閃光放電灯はその全長
を小さくして小型化し得ることから例えばカメラ
本体に内蔵し得るフラツシユランプとして用いら
れている。 Metal cap type flash discharge lamps are generally used as flash lamps that can be built into camera bodies, for example, because they can be miniaturized by reducing their overall length.
従来の金属キヤツプ方式閃光放電灯は例えば第
１図に示すように、石英ガラス製の中央ガラス管
部分１１とその両端に気密に接続されたホウケイ
酸ガラス製の端部ガラス管部分１２，１３とより
成るガラス管１の両端部に金属キヤツプ２Ａ，２
Ｂを気密に接続して封体３を形成し、一方の金属
キヤツプ２Ａの内壁には、前記封体３内にその管
軸Ｐに沿つて突出して伸びるよう陰極体支持棒４
を接続して設け、この陰極体支持棒４の先端には
例えば焼結体より成る陰極体５を設け、他方の金
属キヤツプ２Ｂの内壁には前記封体３内にその管
軸Ｐに沿つて突出して伸びるよう陽極棒６を接続
して設けて構成されている。 A conventional metal cap type flash discharge lamp, for example, as shown in FIG. 1, has a central glass tube section 11 made of quartz glass, and end glass tube sections 12 and 13 made of borosilicate glass hermetically connected to both ends of the central glass tube section 11. Metal caps 2A, 2 are attached to both ends of the glass tube 1 made of
B are airtightly connected to form an enclosure 3, and a cathode support rod 4 is provided on the inner wall of one of the metal caps 2A so as to protrude and extend along the tube axis P into the enclosure 3.
A cathode body 5 made of, for example, a sintered body is provided at the tip of the cathode support rod 4, and a cathode body 5 made of, for example, a sintered body is provided within the enclosure 3 along the tube axis P of the other metal cap 2B. It is constructed by connecting anode rods 6 so as to protrude and extend.
しかしながら通常小型化を達成するために封体
３の内径を陰極体５の外径に近い値に設計するた
め、上述の構成では、陰極体５が封体３の管軸Ｐ
に沿つた中央部を必ずしも位置されると限らず、
封体３の内壁に局所的に片寄つて位置されて陰極
体５の前端部５１が内壁に接触する場合があり、
この場合には点灯時において陰極体５の前端部５
１から発生するアーク放電流によつて封体３の内
壁における陰極体５の前端部５１との接触部が損
傷されてクラツクが発生すること、或いはその損
傷された封体３の内壁から不純物ガスが発生して
アーク放電の放電状態に悪影響を及ぼすことなど
から、閃光放電灯の使用寿命を短縮する欠点があ
る。 However, in order to achieve miniaturization, the inner diameter of the envelope 3 is usually designed to be close to the outer diameter of the cathode body 5, so in the above configuration, the cathode body 5 is
It is not necessarily located in the center along the
There are cases where the front end 51 of the cathode body 5 contacts the inner wall of the enclosure 3 because it is locally offset from the inner wall of the enclosure 3;
In this case, the front end 5 of the cathode body 5 during lighting.
1, the inner wall of the enclosure 3 that contacts the front end 51 of the cathode body 5 may be damaged and cracks may occur, or impurity gas may be released from the damaged inner wall of the enclosure 3. This has the disadvantage of shortening the service life of the flash discharge lamp, since it adversely affects the discharge state of the arc discharge.
本考案は以上の如き欠点を除き、陰極体を封体
の管軸に沿つた中央部に確実に保持せしめること
ができて使用寿命の長い金属キヤツプ方式閃光放
電灯を提供することを目的とし、その特徴とする
ところは、中央ガラス管部分及びその端部に接続
された端部ガラス管部分より成るガラス管の両端
に金属キヤツプを気密に接続して成る封体と、前
記金属キヤツプから前記封体内に突出して伸びる
陰極体支持棒と、この陰極体支持棒の先端に設け
た陰極体と、前記封体における中央ガラス管部分
と端部ガラス管部分との接続部に形成した肉厚が
大きく内径の小さな狭隘部とを具えて成り、前記
陰極体の後端部がその外周面において前記狭隘部
に接触して支持される点にある。 The object of the present invention is to eliminate the above-mentioned drawbacks, and provide a metal cap type flash discharge lamp which can securely hold the cathode body in the center along the tube axis of the envelope and has a long service life. Its features include an enclosure consisting of a central glass tube section and end glass tube sections connected to the ends thereof, and a metal cap hermetically connected to both ends of the glass tube; A cathode body support rod that protrudes into the body, a cathode body provided at the tip of this cathode body support rod, and a connection portion between the central glass tube portion and the end glass tube portion of the enclosure have a large wall thickness. The cathode body has a narrow portion having a small inner diameter, and the rear end portion of the cathode body is supported in contact with the narrow portion on its outer peripheral surface.
以下図面によつて本考案の一実施例について説
明する。 An embodiment of the present invention will be described below with reference to the drawings.
本考案の一実施例においては、第２図及び第３
図にその要部を拡大して示すように、石英ガラス
製の中央ガラス管部分１１の一端にはホウケイ酸
ガラス製の端部ガラス管部分１２を気密に接続し
て設け、前記中央ガラス管部分１１の他端にはホ
ウケイ酸ガラス製の端部ガラス管部分１３を例え
ば次のようにして接続する。即ち、その接続すべ
き両者の端面を突き合せた状態において、これら
の外周面をロールに押し当てて当該ロールを回転
せしめながら、例えばバーナーなどで接続すべき
部分を加熱溶融せしめると共に接続部１４の肉厚
が大きくなるよう、中央ガラス管部分１１と端部
ガラス管部分１３の両者をその両側からその長さ
方向に沿つて接続部１４に力を加えて気密に融着
接続せしめて、その接続部１４に局所的に内径の
小さな狭隘部７を形成してガラス管１を構成す
る。そしてこのガラス管１の両端部にはそれぞれ
例えばモリブデン製の金属キヤツプ２Ａ，２Ｂを
気密に封着して封体３を形成するが、一方の金属
キヤツプ２Ａの内壁には前記封体３内にその管軸
Ｐに沿つて突出して伸びる陰極体支持棒４を接続
して設け、この陰極体支持棒４の先端には例えば
焼結体より成り、その外径が前記狭隘部７の内径
に適合する陰極体５を、当該陰極体５の後端部５
２の外周面が前記狭隘部７と接触した状態で位置
するよう設け、他方の金属キヤツプ２Ｂの内壁に
は前記封体３内にその管軸Ｐに沿つて突出して伸
びるよう陽極棒６を接続して設ける。２１Ａ及び
２１Ｂは金属キヤツプ２Ａ及び２Ｂにそれぞれ設
けた外部接続端子である。 In one embodiment of the present invention, FIGS.
As shown in the enlarged view of the main part, an end glass tube section 12 made of borosilicate glass is airtightly connected to one end of a central glass tube section 11 made of quartz glass. An end glass tube section 13 made of borosilicate glass is connected to the other end of the tube 11 in the following manner, for example. That is, in a state where the end surfaces of the two to be connected are abutted against each other, the outer circumferential surfaces of the two are pressed against a roll and the roll is rotated, and the part to be connected is heated and melted using, for example, a burner, and the connecting portion 14 is heated and melted. In order to increase the wall thickness, both the central glass tube section 11 and the end glass tube sections 13 are connected by applying force to the connection section 14 from both sides along their lengths to form an airtight fusion connection. The glass tube 1 is constructed by locally forming a narrow portion 7 having a small inner diameter in the portion 14. Metal caps 2A and 2B made of molybdenum, for example, are hermetically sealed to both ends of the glass tube 1 to form a seal 3. A cathode body support rod 4 that protrudes and extends along the tube axis P is connected to the cathode body support rod 4, and the tip of this cathode body support rod 4 is made of, for example, a sintered body, and its outer diameter matches the inner diameter of the narrow portion 7. The cathode body 5 is attached to the rear end 5 of the cathode body 5.
An anode rod 6 is connected to the inner wall of the other metal cap 2B so as to protrude and extend along the tube axis P within the enclosure 3. and set it up. 21A and 21B are external connection terminals provided on the metal caps 2A and 2B, respectively.
以上のような構成によれば、ガラス管１におけ
る、中央ガラス管部分１１と端部ガラス管部分１
３との接続部１４に肉厚が大きく、当該ガラス管
１の他の部分に比して内径の小さな狭隘部７を設
けて、この狭隘部７にその後端部５２の外周面が
接触するよう陰極体５を位置せしめているため、
当該陰極体５を封体３の管軸Ｐに沿つた中央部に
確実に支持することができ、そして当該陰極体５
の前端部５１をガラス管１の内壁から確実に離間
した状態とすることができるので、点灯時におい
て陰極体５の前端部５１から発生するアーク放電
流によつてガラス管１の内壁が損傷されることが
抑制されると共に、このことから封体３内に不純
物ガスが混入されることがなくアーク放電の放電
状態を良好なものとすることができ、結局閃光放
電灯の使用寿命を長くすることができる。そして
狭隘部７により陰極体５をガラス管１の中央に確
実に位置せしめることができるため、閃光放電灯
の製造における歩留が向上する利点が得られ、製
造コストの低減化に寄与することができる。そし
て狭隘部７の形成において、中央ガラス管部分１
１と端部ガラス管部分１３との接続時にその接続
部１４に同時に形成することができるので、特別
に複雑な製造手段を用いずに簡単に形成すること
ができて製造上の利点が大きい。 According to the above configuration, in the glass tube 1, the central glass tube portion 11 and the end glass tube portion 1
A narrow part 7 having a large wall thickness and a smaller inner diameter than other parts of the glass tube 1 is provided at the connecting part 14 with the glass tube 1, so that the outer circumferential surface of the rear end part 52 comes into contact with this narrow part 7. Because the cathode body 5 is positioned,
The cathode body 5 can be reliably supported in the central part of the enclosure 3 along the tube axis P, and the cathode body 5 can be
Since the front end 51 of the cathode body 5 can be reliably separated from the inner wall of the glass tube 1, the inner wall of the glass tube 1 is not damaged by the arc discharge current generated from the front end 51 of the cathode body 5 during lighting. This prevents impurity gas from being mixed into the enclosure 3, making it possible to maintain a good arc discharge condition, and ultimately extending the service life of the flash discharge lamp. be able to. Since the narrow portion 7 allows the cathode body 5 to be reliably positioned at the center of the glass tube 1, the yield in manufacturing flash discharge lamps can be improved, contributing to a reduction in manufacturing costs. can. Then, in forming the narrow portion 7, the central glass tube portion 1
1 and the end glass tube portion 13 at the same time, the connecting portion 14 can be formed at the same time, and therefore can be easily formed without using particularly complicated manufacturing means, which is a great manufacturing advantage.
尚、陰極体５はその後端部５２において狭隘部
７により支持されるが、アーク放電流は陰極体５
の前端部５１から陽極棒６の先端部に流れて、後
端部５２からは流れないので当該後端部５２が狭
隘部７と接触していても当該狭隘部７を構成する
材質ガラスが損傷されることはない。 Incidentally, the cathode body 5 is supported by the narrow portion 7 at the rear end portion 52, but the arc discharge current is
The flow flows from the front end 51 of the anode rod 6 to the tip of the anode rod 6, but does not flow from the rear end 52, so even if the rear end 52 contacts the narrow part 7, the glass material forming the narrow part 7 will be damaged. It will not be done.
以上のように本考案金属キヤツプが方式閃光放
電灯は、中央ガラス管部分及びその端部に接続さ
れた端部ガラス管部分より成るガラス管の両端に
金属キヤツプを気密に接続して成る封体と、前記
金属キヤツプから前記封体内に突出して伸びる陰
極体支持棒と、この陰極体支持棒の先端に設けた
陰極体と、前記封体における中央ガラス管部分と
端部ガラス管部分との接続部に形成した肉厚が大
きく内径の小さな狭隘部とを具えて成り、前記陰
極体の後端部がその外周面において前記狭隘部に
接触して支持されることを特徴とする構成である
から、陰極体を封体の管軸に沿つた中央部に確実
に保持せしめることができて使用寿命を長くする
ことができる。 As described above, the metal cap type flash discharge lamp of the present invention is an enclosed body consisting of a central glass tube part and end glass tube parts connected to the ends of the glass tube, with metal caps hermetically connected to both ends of the glass tube. a cathode body support rod that protrudes and extends from the metal cap into the enclosure; a cathode body provided at the tip of the cathode body support rod; and a connection between a central glass tube portion and an end glass tube portion of the enclosure; and a narrow part with a large wall thickness and a small inner diameter, and the rear end part of the cathode body is supported by contacting the narrow part on its outer peripheral surface. Since the cathode body can be reliably held in the center of the enclosure along the tube axis, the service life can be extended.
第１図は従来の金属キヤツプ方式閃光放電灯の
一例を示す説明用断面図、第２図は本考案の一実
施例を示す説明用断面図、第３図は第２図の要部
を拡大して示す説明用断面図である。
１１……中央ガラス管部分、１２，１３……端
部ガラス管部分、１……ガラス管、２Ａ，２Ｂ…
…金属キヤツプ、３……封体、Ｐ……管軸、４…
…陰極体支持棒、５……陰極体、６……陽極棒、
５１……前端部、５２……後端部、１４……接続
部、７……狭隘部。
Figure 1 is an explanatory sectional view showing an example of a conventional metal cap type flash discharge lamp, Figure 2 is an explanatory sectional view showing an embodiment of the present invention, and Figure 3 is an enlarged view of the main part of Figure 2. FIG. 11...Central glass tube part, 12, 13...End glass tube part, 1...Glass tube, 2A, 2B...
...metal cap, 3...enclosure, P...tube shaft, 4...
...Cathode body support rod, 5...Cathode body, 6...Anode rod,
51... Front end portion, 52... Rear end portion, 14... Connection portion, 7... Narrow portion.
Claims (1)
部ガラス管部分より成るガラス管の両端に金属キ
ヤツプを気密に接続して成る封体と、前記金属キ
ヤツプから前記封体内に突出して伸びる陰極体支
持棒と、この陰極体支持棒の先端に設けた陰極体
と、前記封体における中央ガラス管部分と端部ガ
ラス管部分との接続部に形成した肉厚が大きく内
径の小さな狭隘部とを具えて成り、前記陰極体の
後端部がその外周面において前記狭隘部に接触し
て支持されることを特徴とする金属キヤツプ方式
閃光放電灯。 an enclosure comprising a central glass tube section and end glass tube sections connected to the ends thereof, and a metal cap hermetically connected to both ends of the glass tube; and a cathode body extending into the enclosure and protruding from the metal cap. A support rod, a cathode body provided at the tip of the cathode body support rod, and a narrow part with a large wall thickness and a small inner diameter formed at the connection part between the central glass tube part and the end glass tube part in the enclosure. A metal cap type flash discharge lamp, characterized in that a rear end portion of the cathode body is supported in contact with the narrow portion on its outer peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717582U JPS5952555U (en) | 1982-09-30 | 1982-09-30 | Metal cap type flash discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717582U JPS5952555U (en) | 1982-09-30 | 1982-09-30 | Metal cap type flash discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5952555U JPS5952555U (en) | 1984-04-06 |
| JPS6321892Y2 true JPS6321892Y2 (en) | 1988-06-16 |
Family
ID=30327364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14717582U Granted JPS5952555U (en) | 1982-09-30 | 1982-09-30 | Metal cap type flash discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952555U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6484564A (en) * | 1987-09-25 | 1989-03-29 | Kyoritsu Denki Kk | Extra-high pressure discharge lamp |
-
1982
- 1982-09-30 JP JP14717582U patent/JPS5952555U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5952555U (en) | 1984-04-06 |
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