JP4597361B2

JP4597361B2 - Light emitting device of strobe device

Info

Publication number: JP4597361B2
Application number: JP2000397692A
Authority: JP
Inventors: 博志済木
Original assignee: パナソニックフォト・ライティング株式会社
Priority date: 2000-12-27
Filing date: 2000-12-27
Publication date: 2010-12-15
Anticipated expiration: 2020-12-27
Also published as: JP2002196403A

Description

【０００１】
【発明の属する技術分野】
本発明は、写真撮影用の人工光源に有用されているストロボ装置の発光装置に関し、特に閃光放電管と反射傘との構造に関する。
【０００２】
【従来の技術】
周知のように写真撮影の際の人口光源としてストロボ装置は多用されており、近年小型、軽量及び低価格化が著しく、閃光放電管とこれを組込む反射傘との発光装置も簡素化されており、例えばその従来例のものとして特開平６‐１９４７２４号公報にみられるものがある。図３はその従来例において本発明と関わりのある発光装置だけを示したもので、一部を切欠いた断面図である。この従来の発光装置は、ガラスバルブ内に希ガスを封入し、そのガラスバルブ両端に主電極５、６を封止し、ガラスバルブ外表面の縦線の範囲内に導電性被膜のトリガー電極８を施してなる閃光放電管４を金属性の反射傘９に組込んでなる。閃光放電管４はトリガー電極８が反射傘９の内面１０に電気接触するように反射傘９に密接して組込まれ、図示しないトリガー回路からの高電圧が反射傘９を介してトリガー電極８に供給されるようになされている。
【０００３】
さて、ストロボ装置の発光回路は周知のものであり図示していないが、発光に際しては、トリガー回路の動作によって高周波のトリガー電圧が反射傘９を介してトリガー電極８に印加されて閃光放電管４は励起され、主放電コンデンサーに充電された発光エネルギーが主電極５、６間に供給されて閃光放電管４は瞬時に閃光を発するものである。
【０００４】
【発明が解決しようとする課題】
上記従来の発光装置では、トリガー電圧を反射傘９を介して閃光放電管４のトリガー電極８に供給するので、閃光放電管４の発光時にトリガー電極１０が接触している反射傘９との接触部分で温度差による熱衝撃が生じ、それがためにその接触部分のガラスバルブに微小なクラックが多数発生し、閃光放電管の発光回数の増加に伴って、クラックの程度がひどくなって最終的にリークが発生して閃光放電管が発光不良となる惧れがある。
【０００５】
したがって本発明は、かかる問題点を除去すべく成したもので反射傘を介さずにトリガー電極にトリガー電圧を印加し、クラックの発生を生じさせない発光装置を提供するものである。
【０００６】
【課題を解決するための手段】
本発明のストロボ装置の発光装置は金属材料で形成され前記閃光放電管を挿通して取付ける取付穴を有してなる反射傘と、前記閃光放電管を前記反射傘に接触させることなく前記取付穴に保持する弾力性を有した保持部材と前記反射傘の外側に取付けられ、前記閃光放電管の前記反射傘及び前記保持部材外側部の主電極近傍の前記トリガー電極に電気接触するとともに前記トリガー回路に電気接続される接触部材とからなるもので、閃光放電管を反射傘に密着させて、反射傘を介してトリガー電圧を印加するものでないので、閃光放電管のガラスバルブに微小なクラックの発生する惧れが全くない。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態について、図１及び図２とともに説明する。図１は、本発明のストロボ装置の発光装置において閃光放電管を取りつけていない状態を示す斜視図であり、図２は図１の発光装置の一部を切り欠いて示した断面図であり、従来例と同一符号のものは同一のものを示し、その説明は省略する。
【０００８】
図において、１は例えばアルミニウム材料が使用される反射傘、２は閃光放電管４の取付穴、３は反射傘１に一体的に形成されるか又は端部を反射傘にカシメて固定するかによって取付けられる金属材料の接触部材、７，７は反射傘１の取付穴２に取付けられ閃光放電管４を挿通することによって反射傘１に閃光放電管４を保持する弾性力のある保持部材である。
【０００９】
閃光放電管４の反射傘１への取付けに際しては、保持部材７，７を反射傘１の取付穴２に取り付けた後、閃光放電管４を保持部材７，７に挿通して図示のように取り付ける。なおその際、閃光放電管の主電極６の近傍に施されている部分のトリガー電極部が接触部材３に当接して電気接触するように閃光放電管４を保持部材７，７に保持することが必要である。なお、保持部材７，７には、たとえば弾性力のあるシリコンゴムが使用される。また、接触部材３は、保持部材７の弾性力によりトリガー電極８と完全に接触する寸法にするだけで良いが、その材料として弾性力のある金属を用いれば、トリガー電極８との電気接触をより強固なものにすることができる。
【００１０】
さて、以上よりなる発光装置は、前述した主放電コンデンサーに主電極５、６が電気接続され、トリガー回路と接触部材３間はリード線又は弾性のある電気切片を介して電気接続される。そして、トリガー回路の動作により出力されるトリガー電圧は、接触部材３を介してトリガー電極８に印加され、一方主放電コンデンサーに充電された発光エネルギーが主電極５、６を介して閃光放電管４に供給されて閃光放電管４は主放電コンデンサーの発光エネルギーを消費して発光する。
【００１１】
この様に本発明の発光装置は、閃光放電管のガラスバルブの主電極の封止近傍の殆ど熱衝撃の加わらない部分を介してトリガー電圧をトリガー電極に印加するので、ガラスバルブに微小なクラックが全く発生しない。
【００１２】
【発明の効果】
以上述べたように、本発明のストロボ装置の発光装置は、閃光放電管のガラスバルブを反射傘に密接させてトリガー電極と反射傘を電気接触して反射傘を介してトリガー電極にトリガー電圧を印加するものでないので、従来の発光装置のようにガラスバルブに微小なクラックが全く発生せずに、長期に亘って安定して発光使用することが出来る。
【図面の簡単な説明】
【図１】本発明のストロボ装置の発光装置の１実施形態で、閃光放電管を取りつけていない状態を示す斜視図
【図２】図１にかかる発光装置に閃光放電管を取付けた状態を一部切欠いて示した断面図
【図３】従来のストロボ装置の発光装置の一部切欠き断面図
【符号の説明】
１反射傘
２取付穴
３接触部材
４閃光放電管
５、６主電極
７保持部材
８トリガー電極[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light emitting device of a strobe device that is useful as an artificial light source for photographing, and more particularly to a structure of a flash discharge tube and a reflector.
[0002]
[Prior art]
As is well known, strobe devices are widely used as artificial light sources for taking pictures. In recent years, the size, weight, and cost of the flash devices have been remarkably reduced, and the light emitting device with a flash discharge tube and a reflector that incorporates it has been simplified. For example, a conventional example is found in Japanese Patent Application Laid-Open No. 6-194724. FIG. 3 shows only the light emitting device related to the present invention in the conventional example, and is a cross-sectional view with a part cut away. In this conventional light emitting device, a rare gas is sealed in a glass bulb, main electrodes 5 and 6 are sealed at both ends of the glass bulb, and a trigger electrode 8 having a conductive coating is within the vertical line on the outer surface of the glass bulb. The flash discharge tube 4 formed with the above is incorporated in a metallic reflector 9. The flash discharge tube 4 is assembled in close contact with the reflector 9 so that the trigger electrode 8 is in electrical contact with the inner surface 10 of the reflector 9, and a high voltage from a trigger circuit (not shown) is applied to the trigger electrode 8 through the reflector 9. It is made to be supplied.
[0003]
Although the light emitting circuit of the strobe device is well known and not shown in the figure, when light is emitted, a high frequency trigger voltage is applied to the trigger electrode 8 via the reflector 9 by the operation of the trigger circuit, and the flash discharge tube 4 Is excited, the light emission energy charged in the main discharge capacitor is supplied between the main electrodes 5 and 6, and the flash discharge tube 4 instantaneously emits flash.
[0004]
[Problems to be solved by the invention]
In the above conventional light emitting device, the trigger voltage is supplied to the trigger electrode 8 of the flash discharge tube 4 through the reflector 9, so that the trigger electrode 10 is in contact with the reflector umbrella 9 when the flash discharge tube 4 emits light. A thermal shock due to a temperature difference occurs in the part, and as a result, many small cracks occur in the glass bulb at the contact part, and as the number of flash discharges increases, the degree of cracking becomes severe and eventually There is a risk that a flash discharge tube will cause a flash discharge failure.
[0005]
Therefore, the present invention has been made to eliminate such problems, and provides a light emitting device that does not cause cracks by applying a trigger voltage to a trigger electrode without using a reflector.
[0006]
[Means for Solving the Problems]
The light emitting device of the strobe device according to the present invention comprises a reflector having a mounting hole formed of a metal material and attached through the flash discharge tube, and the mounting hole without bringing the flash discharge tube into contact with the reflector. A holding member having elasticity to be held on the outside of the reflector, and the trigger circuit is in electrical contact with the reflector of the flash discharge tube and the trigger electrode in the vicinity of the main electrode on the outside of the holding member. Since the flash discharge tube is not in close contact with the reflector, and the trigger voltage is not applied through the reflector, micro cracks are generated in the glass bulb of the flash discharge tube. There is no fear.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a state where a flash discharge tube is not attached in the light emitting device of the strobe device of the present invention, FIG. 2 is a cross-sectional view showing a part of the light emitting device of FIG. The same reference numerals as those in the conventional example denote the same elements, and the description thereof is omitted.
[0008]
In the figure, reference numeral 1 is a reflector made of, for example, aluminum material, 2 is a mounting hole for the flash discharge tube 4, 3 is integrally formed with the reflector 1, or the end portion is caulked and fixed to the reflector Metal material contact members 7 and 7 are attached to the attachment hole 2 of the reflector 1 and are elastic holding members for holding the flash discharge tube 4 on the reflector 1 by inserting the flash discharge tube 4 through the contact member 7. is there.
[0009]
When attaching the flash discharge tube 4 to the reflector 1, after attaching the holding members 7, 7 to the attachment holes 2 of the reflector 1, the flash discharge tube 4 is inserted into the holding members 7, 7 as shown in the figure. Install. At this time, the flash discharge tube 4 is held by the holding members 7 and 7 so that the trigger electrode portion of the flash discharge tube in the vicinity of the main electrode 6 is in contact with the contact member 3 and makes electrical contact therewith. is required. For the holding members 7, 7, for example, elastic silicon rubber is used. Further, the contact member 3 only needs to be dimensioned so as to be completely in contact with the trigger electrode 8 by the elastic force of the holding member 7. However, if a metal having elastic force is used as the material, the electrical contact with the trigger electrode 8 can be prevented. It can be made stronger.
[0010]
In the light emitting device configured as described above, the main electrodes 5 and 6 are electrically connected to the above-described main discharge capacitor, and the trigger circuit and the contact member 3 are electrically connected via a lead wire or an elastic electrical piece. The trigger voltage output by the operation of the trigger circuit is applied to the trigger electrode 8 through the contact member 3, while the emission energy charged in the main discharge capacitor is flashed through the main electrodes 5 and 6 to the flash discharge tube 4. The flash discharge tube 4 emits light by consuming the light emission energy of the main discharge capacitor.
[0011]
As described above, the light emitting device of the present invention applies a trigger voltage to the trigger electrode through a portion near the seal of the main electrode of the glass bulb of the flash discharge tube to which the thermal shock is hardly applied. Does not occur at all.
[0012]
【The invention's effect】
As described above, the light emitting device of the strobe device according to the present invention has the glass bulb of the flash discharge tube brought into close contact with the reflector, and the trigger electrode and the reflector are in electrical contact, and the trigger voltage is applied to the trigger electrode through the reflector. Since it is not what is applied, the glass bulb does not generate any micro cracks as in the conventional light emitting device, and the light can be used stably over a long period of time.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a flash discharge tube is not attached in an embodiment of a light emitting device of a strobe device according to the present invention. FIG. 2 shows a state in which a flash discharge tube is attached to the light emitting device according to FIG. Sectional view with part cut away [FIG. 3] Partially cutaway sectional view of a light emitting device of a conventional strobe device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reflecting umbrella 2 Mounting hole 3 Contact member 4 Flash discharge tube 5, 6 Main electrode 7 Holding member 8 Trigger electrode

Claims

A flash discharge tube in which a rare gas is sealed inside a glass bulb, a pair of main electrodes are sealed at both ends of the glass bulb, and a trigger electrode of a conductive film is formed on the outer surface of the glass bulb; A light emitting device of a strobe device comprising: a main discharge capacitor that supplies light emission energy to the flash discharge tube; and a trigger circuit that applies a high-frequency trigger voltage to a trigger electrode formed on an outer surface of the glass bulb. The flash discharge tube, a reflector made of a metal material and having a mounting hole for inserting and mounting the flash discharge tube, and the flash discharge tube held in the mounting hole without contacting the reflector wherein a holding member having elasticity is mounted on the outside of the reflector, the trigger electrode of the main electrode near the reflector and the holding member outer portion of the flash discharge tube The light emitting device of the flash device comprising a contact member which is electrically connected to the trigger circuit as well as electrical contact.

The light emitting device of the strobe device according to claim 1, wherein the holding member is made of a silicon rubber material.

The light emitting device of the strobe device according to claim 1, wherein the contact member is made of an elastic metal material.