DE2351389C3

DE2351389C3 - Photo flash unit

Info

Publication number: DE2351389C3
Application number: DE19732351389
Authority: DE
Inventors: Iwata Hiroshi Osaka Misaki Satoru Toyonaka, (Japan)
Original assignee: West Electric Co Ltd, Osaka (Japan)
Priority date: 1972-10-13
Filing date: 1973-10-12
Publication date: 1977-08-04

Description

•»η Λ S in Reihe geschaltet werden. Es wird dann direkt ¹Xr .-,her ein Gleichstrom-Gleichstrom-Wandler 7 das ffironenblitzgerät gespeist.
ner Wandler 7 ist als Transistorwandlerschaltung .fifbaut Diese weist einen Schwingtransistor 10 auf, ü «!mi Basisvorspannung von der Basiswicklung 11 • f. Transformators erzeugt wird, der über die pTmllelschaltung eines Vorspannungswiderstandes 12 einem VoVspannungskondensator 13 an die ν ihenschaltung' der Sekundärbatterien 4 und 5 Sfossen wird. Der Leitfähigkeitszustand des Shwingtransistors 10 steuert die Aufladung des HauD tentladungskondensators 14 durch einen Strom-S R der über die Emitter-Kollektor-Strecke des crnwinetransistors 10 und durch eine Kollektorwickf 1 Se nes Transformators fließt.• »η Λ S can be connected in series. It is then directly Xr ¹ .-, produces a DC-DC converter 7 is fed the ffironenblitzgerät.
ner converter 7 is .fifbaut as a transistor converter circuit latter has an oscillating transistor 10, ü! "mi base bias voltage of the base winding 11 • f. the transformer is generated on the pTmllelschaltung a bias resistor 12 a VoVspannungskondensator 13 to the ν ihenschaltung 'of the secondary batteries 4, and 5 Sfossen. The conductivity state of the oscillating transistor 10 controls the charging of the HauD discharge capacitor 14 by a current S R which flows through the emitter-collector path of the crnwinetransistor 10 and through a collector winding 1 Se nes transformer.

nie erläuterte Funktionsweise wird nun durch eine 1 Vh meßschaltung 17 gesteuert, die wie das Elektro-Ägert indi! Kamera einbezogen ist. Im Falle der nnte chieitung eines vorbestimmten Wertes der A^ euch ung eines Aufnahmeobjektes, wird hierdurch ÄSdfs Elektronenblitzgerät in Betrieb genom-η! η H erfür ist die Lichtmeßschaltung 17 mit dem Ehen elektronischen Verschluß der Kamera gekopnP bzw mit einem Teil der Zeitkonstantenschaltung 5 « Verschlusses Trifft vom Aufnahmeobjekt reflek^dl ,e_S Licht 18 auf ein lichtempfindliches bzw. MoTe tend« Bauelement 19 auf und wird ein Schalter ÄS Niederdrücken des Auslösers der Kamera ^schlössen so wird an die Basis eines Transistors 21 SSetaenWidersund 22 eine Spannung gelegt. Der Transistor 21 wird damit leitend, falls die Beleuchtungs-ISe am fotoleitenden Bauelement 19 unter einem Stimmten Grenzwert liegt. 1st das der Fall, so wird dHkt oder über einen weiteren nachgeschaldium der Aufladung des Hauptentladungskondensators 14 fließt daher ein Primärstrom hoher Stromstärke durch die Kollektorwicklung 15. sowie die Emitter-Köllektor-Strecke des Transistors 10. Dieser Strom beträgt das Anfache der Stromstärke in der Basisschaltung, wenn A_ra den Stromverstärkungsfaktor angibt. Der üblicherweise zwischen den Batterien und dem Blitzgerät erforderliche Stromschalter zur Steuerung des Stromes hoher Stromstärke äst dabe. entbehrlich. Die ,o Betätigung des Schalters 26 in der Basisschaltung des Transistors 10, die nur einen Bruchteil d.eser Stromstarke aufweist, genügt hierfür völlig.Functionality never explained is now controlled by a 1 Vh measuring circuit 17, which like the Elektro-Aegert indi! Camera is involved. In the event that a predetermined value is determined for the object to be photographed, this means that the electronic flash device is put into operation! η H erfür is the light measuring circuit 17 electronic with the marriages shutter of the camera gekopnP or with part of the time constant circuit 5 "closure true from the receiving object reflectors ^dl, e _S light 18 onto a light sensitive or MoTe tend" device 19 and a switch AES Depressing the shutter release button of the camera ^ closed so a voltage is applied to the base of a transistor 21 SSetaenWidersund 22. The transistor 21 thus becomes conductive if the illumination ISe on the photoconductive component 19 is below a correct limit value. If this is the case, then a primary current of high current intensity flows through the collector winding 15 and the emitter-collector path of the transistor 10. This current is times the current in the base circuit if A _{ra is} the current gain factor. The current switch usually required between the batteries and the flash unit to control the current of high amperage is dabe. dispensable. The actuation of the switch 26 in the base circuit of the transistor 10, which has only a fraction of its current strength, is completely sufficient for this.

Eine Anpassung des Scha tvorgangs an den jeweil.-gen Schwingungszustand kann die Belastung der Bauelemente weiter vermindern. So ist »ⁿ.^MS·/ ^en* Ausführungsform gezeigt, bei der d.e Energ.ezufuhrung aus einer Stromquelle 29 erfolgt Zwischen Basis und Emitter des Transistors 10 ist dabe. ein gesteuerte Schaltelement 30 auf die in der F.gur geze.gte We.se m. seiner Anoden-Kathoden-Strecke geschal et W,e in derAn adaptation of the switching process to the respective vibration state can further reduce the load on the components. So is » ⁿ . ^M S · / ^en * embodiment shown in which the energy is supplied from a current source 29 between the base and emitter of the transistor 10 is there. a controlled switching element 30 on the way shown in the F.gur with its anode-cathode route connected to W, e in the

Figur zu erkennen, liegt *e Steuerelektrode des Stromschalters 30 über einen Widerstand 31 an einer Spannungsquelle V„ Das Schaltelement 30 ,st daher in leitenden Zustand Das hat zur Folge daß derTo see figure, lies * e control electrode of the Current switch 30 via a resistor 31 to a Voltage source V "The switching element 30 is therefore in conductive state This has the consequence that the

normalerweise nichtleitende Transistor 1° ™^J Basis und Emitter leitend ist, so daß der Trans, tor 10 nicht schwingen kann und die Energiezufuhr unterbroeher, ist. Liegt nun die Beleuchtungsstärke: em Aufnahmeobjektes unter e.nem ^^⁵'¹"¹^"^normally non-conductive transistor 1 ° ™ ^ J base and emitter is conductive, so that the transistor 10 cannot oscillate and the energy supply is interrupted. If the illuminance is now: em of the subject under e.nem ^^ ⁵ ' ¹ " ¹ ^" ^

so daß von der Lichtmeßschaltung 17^an' Em'tte^und Basis eines Transistors 32 über die klemmen e Signal gelegt wird, so wird dieser Trans'swr 32 eisend und damit der Stromschalter 30 ⁿ'^chtl^^e"^d _u°_d ^a^_m^^r _e ^d _r auch der Leitungszustand!zwischen Basis undI tnrucso that of the light measuring circuit 17 to ^ 'of a transistor 32 is placed on the clamp signal e ^ Em'tte and base, this will Eisend Trans'swr 32 and thus the current switch 30 ^n' ^CHTL ^ ^e _"u ^d _d ^a ° ^ _m ^ ^r _e ^d _r also the line status! between base and I tnruc

des Schwingtransistors 10 aufgehoben. De Schjngof the oscillating transistor 10 canceled. De Schjng

25 err._gl und dadurch _ein Sch.her 26 ₄o »^ 26 liegt in der oben erlau._er,_e„ de, Schalters 6 zu25 err. _gl and thereby _e in Sch.her 26 ₄ o »^ 26 lies in the above erlau. _e r, _e "de, switch 6 closed

Lndler im strichpunktiert angedeuteten E,ek„onen- „ ^^, Sr^nVSe 36 <i.r|«.«.Uer LageLndler in the dash-dotted E, ek "on-" ^^, Sr ^ nVSe 36 <i.r | «.«. Uer location

des Verschlußauslösers 34 ein mit einer Relaisspule 39 und einer Stromquelle in Reihe liegender Unterbrecher 40 geschlossen wird. Über das Schließen des Unterbrechers 40 kann so indirekt der Schalter 6 und damit die Art der Schaltung der Sekundärbatterien 4 und 5 beeinflußt werden.of the shutter release 34 with a relay coil 39 and a current source in series breakers 40 is closed. About closing the breaker 40, the switch 6 and thus the type of switching of the secondary batteries 4 and 5 can be used indirectly to be influenced.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims

AS 12 06 516), in which the closing of the base currentl d SÄ & d closing patent claims: ES of an oscillating transistor is switched. α fa «h-the invention is a device of the opening

1. With a camera connected electronic flash ^Au tga ° - Stalten _{s0 exodus.} that advises with corresponding. the energy source is a primary battery and 5 S ™% X _c ^A _htungsv receives Nissen which has at least one of these to be loaded Sekunda Aa- der.Bete "cn S _{onenblitzgerat} automatically in Betneb terie in the camera, the parallele- to the primary ^battery 8 ^e ° """. _{d The SOLUTION of} this task is that in the chahefut and vo.lge.aden a clamping tension _{can be} seen which is smaller than that of the Pnniarbat. ^ P ^ Refinements are in the Unteranterie, as well as with a main discharge condenser- io f ™haben ^B _denotes ichnet.

IEM converter and a flash lamp, DA ™ P ^s f _h ^K cherish _the design advantages achieved

terie, as well as with a main _discharge cond.

goal. a transducer and a flash lamp, DA ™ P ^s _r f _h ^K _these. Cherish the benefits achieved by the conception

durch - / ge ke η az eic hη et. that a first _ The> Juan ^ _electronic lock is only

Switch (6). the .st formed as a changeover switch and controlled au ^ erschlußöffnungszeit the η _V, the

the battery with the. Energy source. optional. m ^ f ₀ free-hand blurring friction-parallel or series connection with which «5 ^ ³ J _1n ^ _{6n can} . moreover, it is automatic

Shutter release (34) of the camera actuation mechanism; ^rs 5 ™ _blitz put into operation so that the

Big is coupled and after switching it over, the elephant does _{not exist} , _{for d} , _e

Btterien switched in series in that a second switch ^ acklung 8 _Recordin meobjektes the electron

Big is coupled and after its reversal it _switches batteries in series that a second switch ^ acklung 8 _recording object of the electron (20) in a ^{light measuring circuit (17) with the ^ e} ™ _he ? _the d is. Especially for laymen b _ei of the shutter release (34) zo activity coupled bhtz.emsc and _{Not before Operation} after its switching, the Lichtmeßschal · Operatin, ^ _{are t df Wlrd} tung in operation increases, and that in a through J ™ ""™ considerable operating simplification er-light measuring circuit (17) detected undershot dadurcei _{itself is understood} i" h, the flash unit below a predetermined illuminance of an JdWJ be _{taken ieb} when its receiving object, the discharge circuit of the Blitt- «^ J ^ J. _an illumination of the desired Auflampe (23) enabled by actuating a switch (26) range. In this case it was closed. _{U υ}

2. Device according to claim 1. characterized gekennze.ch- _{but the} photography does not see through the dß dt switch (6) one with the Zj » ⁿ ^ _{ll b} ütt It is thus through the

Apparatus according to claim 1, characterized g _Photograph not Rafie you

net that the first switch (6) uses one with the Zj » ⁿ ^ _if used. He is thus through the

bd Gltkontakt 30 B ^ ^er "fh tllt h

net that the first switch (6) one with j ^ _if used. He is thus through the

Closure trigger (34) sliding contact 30 B ^ ^he "f _{no FaHe} connected worse, having a very (35). _{Υ u..} J £ _F! Cases but in the production of useful

¹¹

3 Apparatus according to claim 1, characterized gekennze.ch- many hunt them _umerstützt erufsfotogra- _{For the B}

net. that the light measuring circuit (17), a relay _device BiklerJi S _{"te mk electronically} controlled having its relay contacts 26) f the switch" ^ e ^ g _Sonderfä, _{gee len,} _gnet. m this d Eldtkreises the Bl.tz- 35 Ve 'c «Iiius _{hd Bfsfo} tograf through

has, whose relay contacts the scarf) ^ ^ _{Special cases} , _{len gee} , _gnet . m this

_{The professional photographer also carried out the} operation of the discharge circuit of the Bl.tz- 35 Ve "c" iiius ^ ^

lamp (23) and its Rela.sspule (25) Acidification with ^ ^ndertai ". _Ste of the Inbetr.ebnahme

an indicator lamp (24) for falling below the the ^ itself a g

predetermined illuminance in series overall ⁰¹¹ J ^ J ¹ _drawing, the invention is for example

is switched. ... _λ illustrates, namely shows

4. Device according to one of claims 1 to 3, 40 · ^ver _F ^a . ⁿ fidie circuit of an embodiment, characterized in that the discharge circuit Mg. _{Modification of} the embodiment according to a direct current-direct current converter (7) e.nen r g-

Oscillating transistor (10), a transformer (11.15) ig. '. _and partly as a block circuit

and a power switch (30) which is indicated by the M & _{ktion <and}

Light measuring circuit (17) can be controlled. ⁴ⁱ Pi ' ₄ another modification of the one shown

5. Apparatus according to claim 4, characterized gekennze.ch- F g. 4 '™ ^e

net that the power switch (30) with the Lichtmeß- ^Α ™haben ^η 8 ^ _ηβ primary battery 1, to which several

circuit (17) via a control circuit from J'JjJ J f _{erien 4j} 5 to that shown in the figure

dd (31) d a control transistor ^^^^ d Bi d Scundarbatte

circuit (17) via a control circuit JJjJ J f _{erien 4j} 5 to that shown in the figure

a resistor (31) and a control transistor ^^^^ are. At the secondary battery (32) connected is. rien can be nickel-cadmium batteries

act A conventional SrSn battery is used as the primary battery. When using

such batteries do not need to be between

j. Primary battery and ^^^ ™ J ^ £ ™

The invention relates to a camera ^Auft ™ j; ^e ^ from the

connected electronic flash device after the Oberbclic \ largely discharged Pr.mar-

handle of claim 1. Such devices known sinc sec ™ ^a tt ^ _{compound of lJrimarbatte.}

(DT-AS 10 05 141). The camera indicates that ^eL ° ^at ^ _s ^e _ekundärbaUe rie switched on. Light measuring circuit on, as in particular / ur «o" ^e "" J ^ ™ ^a ; _Fi , _far he has a switch 6, which is intended for use with electronic shutters ^ n recognnnh ^ ^ ^ _{primärbaUeri}

is. From this light measuring circuit w.rd not only »^ g _{a or mk d} contact b

electric lock controlled, but the user "^ this embodiment is concerned

made about an indicator light also M.tte.lung if a binding ^ ^ gg in _{One ork nnt} _because ß

the electronic lock a so long locks Ff- 05 itself ^^ ¹ _{d Sch} ^H _{akers 6 from} contact a to

The time must be selected so that the risk of blurring in the case of a _row .