CN1472588A - Camera flash - Google Patents
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- CN1472588A CN1472588A CNA031458246A CN03145824A CN1472588A CN 1472588 A CN1472588 A CN 1472588A CN A031458246 A CNA031458246 A CN A031458246A CN 03145824 A CN03145824 A CN 03145824A CN 1472588 A CN1472588 A CN 1472588A
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Abstract
Provided is an electronic flash device for camera which permits selection of a light emission source to be supplied to a discharge tube according to the shutter speed of a focal plane shutter in flat emission.The electronic flash device is characterize by having: a first light emitting means for allowing the discharge tube 12A to emit light by using a main capacitor 17; a second light emitting means for allowing the discharge tube 12A to emit light a plurality of times by using a battery 100 and an oscillation transformer 240; the focal plane shutter; and a control means 130 for performing control so as to allow the discharge tube 12A to emit light by using the first light emitting means when the exposure time for taking a photograph is longer than the electronic flash synchronization time of the focal plane shutter and to allow the discharge tube to emit light by using the second light emitting means when the exposure time is shorter than the electronic flash synchronization time.
Description
Technical field
The present invention relates to the camera flash unit, in more detail, relate to camera flash unit with common flashlamp lighting function and astigmatism (flat) lighting function.
Background technology
As everyone knows, in having the camera of focal-plane shutter, when using flashlamp, photograph the required time shutter when faster than the tuning period of above-mentioned focal-plane shutter (focal plane shutter) and flashlamp, emit on a small quantity intermittently by the energy that will put aside on capacitor, with the luminous lasting regular hour of Xe pipe (xenon discharge tube), irradiation is utilized so-called astigmatism luminous by photo-object.
But, the anterior shutter curtain of focal-plane shutter and back shutter curtain form simultaneously that the slit of exposure usefulness simultaneously moves during in, above-mentioned astigmatism is luminous, usually must continue repeatedly to carry out the luminous on a small quantity of fixed amount, but owing to use the energy of savings in capacitor, so in this capacitor, must put aside enough electric charges, for the charging (charge) of carrying out this electric charge needs the regular hour.Therefore, when waiting time that finishes to be charged, might lose best photo opporunity.
In addition, luminous by above-mentioned astigmatism, make guide number big, must add the capacity of large capacitor itself, the result can make camera maximize.
In order to address the above problem, first purpose of the present invention is, the flash unit that provides a kind of camera to use, described flash unit is in the time shutter when faster than the flashlamp tuning period of focal-plane shutter, can not use capacitor, but the flashlamp when only using the battery of mounting on camera to photograph is luminous.
Second purpose of the present invention is that a kind of camera flash unit that can be supplied to the luminous source of supply of discharge tube according to the shutter speed selection of focal-plane shutter is provided.
For arriving above-mentioned purpose, according to camera flash unit of the present invention, it is characterized by, it comprises: the discharge tube of the flashlamp light of being used by photo-object is shone in emission; The energy that utilization is put aside on the main capacitor makes the first luminous lighting means of above-mentioned discharge tube; Need not above-mentioned main capacitor, only utilize battery to make above-mentioned discharge tube carry out repeatedly the second luminous lighting means; And, the control gear of controlling by following mode, promptly, its control mode is, when photography is slower than the flashlamp tuning period of above-mentioned focal-plane shutter and flashlamp tuning period with the time shutter, utilize above-mentioned first lighting means to make above-mentioned discharge tube luminous, when photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, utilize above-mentioned second lighting means to make above-mentioned discharge tube luminous.
In addition, according to camera flash unit of the present invention, in having the camera of focal-plane shutter, it is characterized by, it comprises: oscillation transformer; And the discharge tube luminous with the cycle interlock of above-mentioned oscillation transformer; Wherein, when photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, during exposing, light emitting control is proceeded.
And then, according to camera flash unit of the present invention, in having the camera of focal-plane shutter, it is characterized by, it comprises: the discharge tube of the flashlamp light of being used by photo-object is shone in emission, make the first luminous lighting means of above-mentioned discharge tube, make the second luminous lighting means of above-mentioned discharge tube; When photography is slower than the flashlamp tuning period of above-mentioned focal-plane shutter and flashlamp tuning period with the time shutter, utilize above-mentioned first lighting means to carry out luminous, when photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, utilize above-mentioned second lighting means to carry out luminous, in addition, it is characterized by, above-mentioned first lighting means is that the energy of supply savings in capacitor carries out luminous mechanism, and above-mentioned second lighting means is the mechanism luminous with the cycle interlock of oscillation transformer.
Brief description of drawings
Fig. 1 is the stereoscopic figure that observes the camera with the flash unit shown in first kind of form of implementation of the present invention from right oblique upper;
Fig. 2 is the sectional view along II-II ' line of Fig. 1;
Fig. 3 is the simple perspective elevation of the inner structure of presentation graphs 1;
Fig. 4 is the sectional view of structure of illuminating part of the flashlamp of presentation graphs 3;
Fig. 5 is the circuit diagram of the illuminating circuit of the flash unit shown in expression first kind of form of implementation of the present invention;
Fig. 6 is the time diagram of action of each one of illuminating circuit shown in Figure 5;
Fig. 7 is the stereoscopic figure that observes the camera with the flash unit shown in second kind of form of implementation of the present invention from right oblique upper;
Fig. 8 is the sectional view along IX-IX ' line of Fig. 1;
Fig. 9 is the perspective elevation of overview of the inner structure of presentation graphs 7;
Figure 10 is the sectional view of structure of illuminating part of the flashlamp of presentation graphs 9;
Figure 11 is the circuit diagram of the illuminating circuit of the flash unit shown in expression second kind of form of implementation of the present invention;
Figure 12 is the time diagram of the main capacitor charging action of explanation in illuminating circuit shown in Figure 11;
Figure 13 is the time diagram of the astigmatic luminous action in the explanation illuminating circuit shown in Figure 11;
Figure 14 is the time diagram of the luminous action of basis in the explanation illuminating circuit shown in Figure 11.
The concrete form of implementation of invention
Below, with reference to description of drawings form of implementation of the present invention.
Fig. 1 is the stereographic map of the outward appearance seen when right oblique upper is observed the camera of the flash unit with expression first kind of form of implementation of the present invention, Fig. 2 is the sectional view along II-II ' line of Fig. 1, and Fig. 3 is the summary perspective elevation of the inner structure of presentation graphs 1.
The flash unit of the camera of this first kind of form of implementation is for reaching the form of implementation of first purpose of the present invention.
As shown in Figure 1, on the central portion of the front of the encapsulating housing 1 that constitutes camera body, configuration has the lens barrel 8 that is used for the photographic optical system of the usefulness of being made a video recording by photo-object, above it, dispose the view finder window 4 that optical observation is used by photo-object, and then at the right oblique upper of aforementioned lens barrel 8, configuration is mapped to the flashlamp light-emission window of being used on the photo-object 3 with the illumination of flashlamp.
In addition, left side at the upper surface of aforementioned camera encapsulating housing 1, set the button release 5 of the usefulness that begins to photograph, and then, in the back side of aforementioned camera encapsulating housing 1 left upper portion, be provided with and set for the zoom button 6 that the multiple of photographing is arbitrarily used by photo-object, and when the cameraman photographs, drive aforementioned lens barrel 8.
In addition, in this form of implementation, be " 1 " with the length legislations of the length direction of above-mentioned camera encapsulating housing 1.
As shown in Figure 2, in the inside of camera encapsulating housing 1,, can dispose aforementioned lens barrel 8 along optical axis O at central portion with moving freely, at its left, configuration film carrier chamber 9, in addition, right-hand at it, the spool chamber 7 that film is used is batched in configuration, and then, at its back side, configuration focal-plane shutter 10.
And then, as shown in Figure 3, above aforementioned lens barrel 8, configuration comprises the finder optical system 4a of view finder window 4, in addition, 4a is right-hand at this finder optical system, on the position of the front of aforementioned camera encapsulating housing 1 right upper portion, configuration comprises the flashlamp illuminating part 3a of aforementioned flashlamp light-emission window 3, and then, at the back side of this flashlamp illuminating part 3a, configuration is to the battery 11 of whole camera driver power supply.
As shown in Figure 4, aforementioned flashlamp illuminating part 3a, constitute by reflecting umbrella 15, glow discharge tube (below be referred to as the Xe pipe) 12, the electrode terminal 13 of this Xe pipe, the trigger electrode that on the outer wall of this Xe pipe 12, forms, above-mentioned reflecting umbrella 15 will reflect to the range of exposures of predesignating from the light of above-mentioned Xe pipe 12 emissions, in addition, above-mentioned Xe pipe 12 utilizes the next control signal of describing later of control circuit 30 (with reference to Fig. 5) to begin luminous.
In addition, in this first kind of form of implementation, be " m " with the length legislations of the length direction of above-mentioned Xe pipe.
Fig. 5 is the circuit diagram of the camera of expression first kind of form of implementation of the present invention with the illuminating circuit of flash unit, and Fig. 6 is the time diagram of each action of illuminating circuit shown in Figure 5.
As shown in Figure 5, above-mentioned illuminating circuit is by constituting with the lower part: power-supply battery 20; Have the control circuit 30 of switch with lead-out terminal ST1, ST2, voltage determination terminal VB; The on-off element 40,50 that constitutes by FET etc.; The oscillation transformer 60 that first secondary coil 63 of Duoing by first primary coil 61, second primary coil 62, than the number of turn of above-mentioned primary coil, the number of turn of Duoing than the number of turn of the number of turn of above-mentioned primary coil 61,62 and first secondary coil 63 constitute as the second subprime coil 64 of trigger winding; Be coated with the above-mentioned Xe pipe of transparency electrode (trigger electrode) 71 from the teeth outwards.
The circuit that is connected in series of be connected in series circuit and above-mentioned second primary coil 62 and the above-mentioned on-off element 50 of above-mentioned first primary coil 61 and above-mentioned on-off element 40 is connected on the aforementioned power source battery 20 in parallel.
In addition, on the two ends of above-mentioned first secondary coil 63, connect to fill the above-mentioned Xe pipe 12 of xenon in parallel, and then the output terminal of second subprime coil 64 is connected on the trigger electrode 71 of outer wall of aforementioned Xe pipe 12.
And then above-mentioned control circuit 30, its lead-out terminal ST1 are connected on the control gate terminal of aforementioned switches element 40, and in addition, above-mentioned lead-out terminal ST2 is connected on the control gate terminal of aforementioned switches element 50.
Secondly, the astigmatic luminous action of the flashlamp illuminating circuit of such formation is described with the time diagram of Fig. 6.
At first, when the push action of the button release 5 that utilizes earlier figures 1 was input to not shown CPU with release signal, camera became photography state (with reference to Fig. 6-a).Meanwhile, by the lead-out terminal ST1 output connection signal " H " of as shown in Figure 5 aforementioned control circuit 30 (high) (with reference to Fig. 6-b), above-mentioned on-off element 40 conductings are flow through on-off element 40 from the electric current of aforementioned power-supply battery 20 by aforementioned first primary coil 61.
When electric current flows through the primary coil of above-mentioned transformer 60, on primary coil, produce electric energy, this electric energy is passed on the secondary coil 63 by the effect of electromagnetic induction.
Be passed to the magnetic energy on the secondary coil 63, be transformed into electric energy, from this secondary coil 63 to aforementioned second subprime coil 64 produce powers.At this moment, the voltage of the lower end 63a of above-mentioned first secondary coil 63 (in Fig. 5) becomes minimum, and the voltage of the upper end 64b of above-mentioned second subprime coil 64 (in Fig. 5) becomes the highest state.In addition, in this state, because electric current does not flow through aforementioned Xe pipe 12, so resistance value becomes infinity, the outgoing side of secondary coil 63 becomes high impedance status.
In addition, at this state, on secondary coil, produce and the electric energy that flows through the opposite current direction of primary coil 61, owing to be transformed into voltage, go up the generation high voltage at the upper end 63b of aforementioned first secondary coil (in Fig. 5), and then, go up the generation voltage higher at the upper end 64b of aforementioned second subprime coil (in Fig. 5) than the voltage on the upper end 63b that occurs in aforementioned first secondary coil.Thereby on the trigger electrode 71 of the outer wall of above-mentioned Xe pipe 12, applying high voltage excites aforementioned Xe pipe 12 (with reference to Fig. 6-d).
Here, owing to only can not excite aforementioned Xe pipe 12 with aforementioned switches element 40, so, (low) (, connection signal " H " is being outputed to above-mentioned lead-out terminal ST2 is going up (with reference to Fig. 6-c) with reference in Fig. 6-b) from aforementioned lead-out terminal ST1 output cut-off signal " L ".Like this, the electric current that flows through the on-off element 40 and first primary coil 61 is connected, above-mentioned on-off element 50 conductings, so, by aforementioned second primary coil 62, flow through on-off element 50 from the electric current of aforementioned battery 20.
When electric current flows through above-mentioned primary coil 62, on primary coil, produce electric energy, this electric energy is passed on the secondary coil 64 by the electromagnetic induction effect.
Be delivered to the magnetic energy on the secondary coil 64, be transformed into electric energy, to aforementioned second subprime coil 63 energy takes place from this secondary coil 64.Here, owing to flow through the electric current of aforementioned second primary coil 62 be and the above-mentioned opposite electric current of sense of current that flows through aforementioned first primary coil 61, so, when the energy on occurring in secondary coil 63,64 makes on above-mentioned lead-out terminal ST1 output connection signal, produce rightabout energy.Like this, when from aforementioned output action ST1 output connection signal, the opposite high voltage of extra symbol on the trigger electrode 17 of the outer wall of above-mentioned Xe pipe 12.(with reference to Fig. 6-d).
Like this, alternately export connection signal " H " by lead-out terminal ST1, ST2 arbitrary number of times from above-mentioned control circuit 30, (with reference to Fig. 6-b, c), the Xe gas of aforementioned Xe pipe 12 becomes excited state.Resistance value reduces.When resistance value reduced, the resistance value at the two ends of aforementioned first secondary coil 63 diminished, and managed 12 upper reaches excess current Ixe (with reference to Fig. 6-e) at aforementioned Xe.In addition, like this, because lead-out terminal ST1, the ST2 of above-mentioned control circuit 30 alternately export make-and-break signal repeatedly, so, flow through the electric current I xe of aforementioned Xe pipe 12, when aforementioned lead-out terminal was exported make-and-break signal at every turn, sense of current was also reversed (with reference to Fig. 6-e).
Simultaneously, along with the reduction of the resistance value of aforementioned Xe pipe 12, flow through electric current I xe from the two ends of above-mentioned first secondary coil 63, it is 12 luminous that aforementioned Xe manages.Because when aforementioned Xe manages 12 when luminous, the impedance reduction of the second coil side of aforementioned transformer 60 is so the electric current that flows through the primary side of aforementioned transformer 60 sharply increases.Thereby, when the electric current of aforementioned primary coil increases, the change in voltage of aforementioned power source battery.The VB of aforementioned control circuit 30 measures terminal and monitors this voltage, confirms luminous (with reference to Fig. 6-g), according to the voltage of aforementioned battery 20, changed in the output cycle of the make-and-break signal of aforementioned lead-out terminal ST1, ST2 lentamente (with reference to Fig. 6-b, c).
When such control flash lamp circuit, after the anterior shutter curtain of focal-plane shutter is opened, during the shutter curtain shading of back, can carry out repeatedly a certain amount of luminous (with reference to Fig. 6-e, f) from aforementioned Xe pipe 12.In addition, when the luminous beginning of aforementioned Xe pipe 12, when aforementioned control circuit 30 is exported light emission stop signals, make the output of aforementioned lead-out terminal ST1, the ST2 of aforementioned control circuit 30 disconnect (with reference to Fig. 6-b, c) simultaneously from not shown control device.Luminous stopping is (with reference to Fig. 6-e).
Like this, use in the flash unit at the camera shown in first kind of form of implementation of the present invention, owing to the luminous capacitor that do not use for the Xe pipe, so, can form little camera encapsulating housing, and, can reduce cost.
In addition, required time shutter of photography than the fast situation of the flashlamp tuning period of focal-plane shutter under owing to directly make the Xe pipe luminous via oscillation transformer from battery, so, can carry out uniform irradiation and be configured the astigmatic luminous of object.
Fig. 7 is the stereoscopic figure that sees when right oblique upper is observed the camera with the flash unit shown in second kind of form of implementation of the present invention, Fig. 8 is the sectional view along IX-IX ' line of Fig. 7, and Fig. 9 is the perspective elevation of overview of the inner structure of presentation graphs 7.
The flash unit of the camera of this second form of implementation is for reaching the form of implementation of the 2nd purpose of the present invention.
The flash unit of this second kind of form of implementation, its camera encapsulating housing, and the overview of the inner structure of camera, almost identical to first kind of form of implementation shown in Figure 4 with earlier figures 1, difference is, configuration flashlamp main capacitor in the camera encapsulating housing, and dispose and can select directly to supply the mechanism of luminous energy and after the main capacitor charging, supply the flash lamp circuit of luminous mechanism by capacitor to the Xe pipe to the Xe pipe from power-supply battery.Thereby, difference only is described below, the structural elements identical with first kind of form of implementation paid identical label, omits its explanation.
As Fig. 8 and shown in Figure 9, flashlamp is with main capacitance 17, is configured in the left of aforementioned film box office 9 of the inside of camera encapsulating housing 1.Thereby, when the aforementioned main capacitor 17 of configuration in above-mentioned camera encapsulating housing 1, the length of the length direction of above-mentioned camera encapsulating housing 1 becomes " 1 ' ", and it is long to become " 1 " than the length of the length direction of the aforementioned camera encapsulating housing of stipulating in first kind of form of implementation 1.
In addition, Figure 10 is the sectional view of structure of the flashlamp illuminating part 3a of presentation graphs 9, when the aforementioned flashlamp of configuration is used main capacitor 17, owing to can shine jumbo light quantity, so, the length " m " than the length direction of aforementioned aforementioned Xe pipe 12 shown in Figure 3 is long for " m ' " for the length of length direction that makes above-mentioned Xe pipe 12A, and the length of the length direction of flashlamp illuminating part 3a is elongated.
Figure 11 is the circuit diagram of the camera shown in expression second kind of form of implementation of the present invention with the illuminating part of flash unit, Figure 12 is the time diagram of explanation to the charging action of the main capacitor of illuminating circuit shown in Figure 11, Figure 13 is the time diagram of explanation to the astigmatic luminous action of illuminating circuit shown in Figure 11, and Figure 14 is the time diagram that utilize main capacitor luminous action of explanation to illuminating circuit shown in Figure 11.
As shown in figure 11, flashlamp illuminating circuit in this second kind of form of implementation, by constituting: power-supply battery 100 with the lower part, has lead-out terminal 140,150,160,170 control circuit 130, charging on-off element 200,230, by first primary coil 241, second primary coil 242, the oscillation transformer 240 that secondary coil 243 constitutes, commutation diode 250, luminous switching relay switch 260, resistance 110, illuminating on-off element 120, trigger capacitor 290, by primary coil 281, the trigger winding 280 that secondary coil 282 constitutes, flashlamp is with main capacitor 17, for luminous easily, be coated with the Xe pipe 12A of transparency electrode (trigger electrode) 301 from the teeth outwards.
Above-mentioned first primary coil 241 of above-mentioned oscillation transformer 240 and the circuit that is connected in series of above-mentioned charge switch element 200, and above-mentioned second primary coil 242 of above-mentioned oscillation transformer 240 and above-mentioned charging are with the circuit that is connected in series of on-off element 230.Be connected in parallel on the aforementioned power source battery 100.
In addition, aforementioned charging is connected on the above-mentioned output action 150 of aforementioned control circuit 130 with the control utmost point (the ゲ one ト) terminal of on-off element 200, and then, aforementioned charging is connected on the above-mentioned output action 140 of aforementioned control circuit 130 with the control gate terminal of on-off element 230, in addition, the two ends of the aforementioned secondary coil 243 of aforementioned oscillation transformer 240 are connected to the input end of above-mentioned commutation diode 250.
On the output terminal of above-mentioned commutation diode 250, be connected with aforementioned luminous switching in parallel with relay switch 260 and above-mentioned flashlamp series circuit with the secondary coil 281 of be connected in series circuit and aforementioned resistance 110 and the aforementioned triggering capacitor 290 and the aforementioned trigger winding 280 of the series circuit of main capacitor 17, aforementioned Xe pipe 12A and aforementioned illuminating switch and 120.
In addition, the above-mentioned luminous switching control terminal of relay switch 260, be connected on the lead-out terminal 160 of aforementioned control circuit 130, in addition, the control gate terminal of aforementioned illuminating on-off element 120 is connected on the lead-out terminal 170 of aforementioned control circuit 130, and then, on the tie point of aforementioned Xe pipe 12A and aforementioned illuminating on-off element 120, be connected with the tie point of aforementioned resistance 110 and aforementioned triggering capacitor 290.
Secondly, with the time diagram of Figure 11 and Figure 12, illustrate to have said structure the main capacitor of flashlamp illuminating circuit on the action of charging.
In original state.(with reference to Figure 12-b), aforementioned luminous switching can be to aforementioned main capacitor 17 chargings with relay switch 260 closures when with the above-mentioned lead-out terminal 160 output connection signals " H " of aforementioned control circuit 130.
Secondly, when the above-mentioned lead-out terminal 150 output connection signals " H " of aforementioned control circuit 130 (with reference to Figure 12-c), flow through electric current in the power supply primary coil 241 of above-mentioned oscillation transformer 240, aforementioned charging with on-off element 200 by aforementioned power source battery 100.
When aforementioned first primary coil 241 flows through electric current, on primary coil, produce electric energy, by the electromagnetic induction effect, with this electrical energy transfer to the secondary coil 243 of above-mentioned oscillation transformer 240, by this secondary coil 243 magnetic energy is transformed into electric energy, in secondary coil 243 upper reaches excess current.This electric current becomes DC current by commutation diode 250, as electric charge put aside on the aforementioned main capacitor 17 and above-mentioned triggering capacitor 290 on.
When the energy that is produced by aforementioned first primary coil 241 discharges and finishes, the connection signal of the lead-out terminal 150 of aforementioned control circuit 130 is disconnected (with reference to Figure 12-c), simultaneously, from the lead-out terminal 140 output connection signals of aforementioned control circuit 130 (with reference to Figure 12-d).
When by above-mentioned lead-out terminal 140 output connection signals " H ", by aforementioned battery 100 at second primary coil 242 of above-mentioned oscillation transformer 240, aforementioned charging with on-off element 230 upper reaches excess current.
When electric current flows through aforementioned second primary coil 242, on primary coil, produce electric energy, utilize electromagnetic induction this electrical energy transfer to be given the secondary coil 243 of above-mentioned oscillation transformer 240, with this secondary coil 243 magnetic energy is transformed into electric energy, in secondary coil 243 upper reaches excess current, this electric current is put aside electric charge on aforementioned main capacitor 17 and above-mentioned triggering capacitor 290 via aforementioned commutation diode 250.
Like this, by with the above-mentioned lead-out terminal 150,140 of above-mentioned control circuit 130 break-make alternately, above-mentioned charging alternately break-make (with reference to Figure 12-c, d) of on-off element 200,230 is charged to the electric charge savings on aforementioned main capacitor 17 and the above-mentioned triggering capacitor 290.Then, when the charging voltage (V) of aforementioned main capacitor 17 reaches the voltage (Va) of regulation (with reference to Figure 12-e), stop from the output of aforementioned control circuit 130.Then, by the lead-out terminal 160 output cut-off signals " L " of aforementioned control circuit 130 (with reference to Figure 12-b), above-mentioned luminous switching is disconnected, the charging release with relay switch 260.In addition, the lead-out terminal 170 of aforementioned control circuit 130 keep to disconnect between charge period (with reference to Figure 12-a).
Secondly, use Figure 11, and the time diagram of Figure 13 illustrates the astigmatic luminous action (needing the luminous action of a spot of light quantity) of the flashlamp in second kind of form of implementation of the present invention.
When illustrated in fig. 12 after capacitor charging finishes, the pressing operation of the button release 5 of earlier figures 7, when release signal is input to not shown CPU (with reference to Figure 13-a), the lead-out terminal 160 of aforementioned control circuit 130 keeps disconnecting (with reference to Figure 13-b), by lead-out terminal 170 output connection signals (with reference to Figure 13-e), receive this connection signal, aforementioned illuminating on-off element 120 is connected.Like this, the flow of charge of savings on aforementioned main capacitor 290 crossed illuminating on-off element 120, the primary coil 281 of aforementioned trigger winding 280.
When electric current flows through the primary coil 281 of aforementioned trigger winding 280, on this primary coil 281, produce electric energy, by the electromagnetic induction effect, transfer energy to the secondary coil 282 of above-mentioned trigger winding 280, be transformed into voltage.This secondary coil 282, be connected on the trigger electrode 301 of outer wall of above-mentioned Xe pipe 12A, because aforementioned Xe pipe 12A becomes very high resistance value, so, the electric energy that is delivered on the secondary coil 282 of aforementioned trigger winding 280 is transformed into voltage, high voltage is applied on the outer wall 301 of aforementioned Xe pipe 12A.
When on the trigger electrode 301 of the outer wall that high voltage is applied to aforementioned Xe pipe 12A, the inner xenon of Xe pipe is excited, and insulation resistance diminishes, and flows through electric current.At this moment, when by the lead-out terminal 150 output connection signals of aforementioned control circuit 130 (with reference to Figure 13-c), as mentioned above, produce power on first primary coil 241 of aforementioned oscillation transformer 240, transfer energy on the secondary coil 243, electric current I xe flows through aforementioned Xe pipe 12A (with reference to Figure 13-f) via aforementioned commutation diode 250.When electric current flow through this Xe pipe 12A, aforementioned X pipe 12A was luminous.
Because the energy that produces on first primary coil 241 of aforementioned oscillation transformer 240 is little, so, the fluorescent lifetime short (with reference to Figure 13-c, f) of aforementioned Xe pipe 12A.
Therefore, when disconnecting,, current by aforementioned lead-out terminal 140 output connection signals (with reference to Figure 13-c, d) with the lead-out terminal 150 that makes aforementioned control circuit 130, produce power on second primary coil 242 of aforementioned oscillation transformer 240 transfers energy on the aforementioned secondary coil 243.
Like this, by lead-out terminal 150,140 break-makes that alternately make above-mentioned control circuit 130, first primary coil 241 of above-mentioned oscillation transformer 240, second primary coil 242 be produce power (with reference to Figure 13-c, d) alternately repeatedly, electric current I xe flows through aforementioned Xe pipe 12A, (with reference to Figure 13-f), after the anterior shutter curtain of focal-plane shutter is opened during the shutter curtain shading of back (with reference to Figure 13-g, h), can manage 12A from aforementioned Xe and carry out for many times quantitative astigmatic luminous.
In addition, because the luminous electric charge that is charged in the aforementioned main capacitor 17 that do not use of this astigmatism so luminous quantity is few, is defined as " n " with this luminous quantity.
When astigmatism is luminous when reaching official hour, the lead-out terminal 150,140 of aforementioned control circuit is disconnected, make luminous stopping (with reference to Figure 13-c, d, f).In addition, lead-out terminal 160 keeps off-state (with reference to Figure 13-b) between astigmatic light emission period.
Secondly, use Figure 11, and the time diagram of Figure 14 illustrates in the flashlamp illuminating circuit of this second kind of form of implementation the luminous action when big light quantity is luminous.
After charging illustrated in fig. 12 finishes, when the push action of the button release 5 by earlier figures 7 is input to not shown CPU with release signal (with reference to Figure 14-a), by the lead-out terminal 160 output connection signals of aforementioned control circuit 130 (with reference to Figure 14-b), by connecting luminous switching release-push 260, aforementioned main capacitor 17 becomes conducting state with above-mentioned Xe pipe.
At this state, when by aforementioned lead-out terminal 170 output signals (with reference to Figure 14-e), receive this connection signal, aforementioned illuminating on-off element 120 is connected, the electric charge of savings on aforementioned triggering capacitor 290 flows on the primary coil 281 of illuminating on-off element 120, aforementioned trigger winding 280.
When electric current flows through the primary coil 281 of aforementioned trigger winding 280, the electric energy of this primary coil 281 is passed on the secondary coil 282 of trigger winding 280, this secondary coil 282 is connected on the trigger electrode 301 of outer wall of above-mentioned Xe pipe 12A, because the resistance value of aforementioned Xe pipe 12A is very high, so, the electric energy that is delivered on the secondary coil 282 of aforementioned trigger winding 280 is transformed into voltage, high voltage is applied on the trigger electrode 301 of outer wall of aforementioned Xe pipe 12A.
When on the trigger electrode 301 of the outside that high voltage is applied to aforementioned Xe pipe 12A, the inner xenon of Xe pipe is excited, insulation resistance diminishes, and the electric charge of savings on aforementioned main capacitor 17 flows through (with reference to Figure 14-f) as electric current I xe via illuminating on-off element 120 by aforementioned Xe pipe 12A.When electric current flow through this Xe pipe 12A, aforementioned Xe pipe 12A was luminous.
Like this, after focal-plane shutter is opened, during shading in (with reference to Figure 14-g), can carry out the luminous of big light quantity from aforementioned Xe pipe.
In addition, because above-mentioned big light quantity luminous utilizes the electric charge that is charged in the aforementioned main capacitor 17 luminous, so when this luminous quantity is defined as n ' time, the n ' luminous quantity n (with reference to Figure 13) more luminous than aforementioned astigmatism is big, luminous quantity is many.
When this big light quantity luminous reaches official hour, the lead-out terminal 170 of aforementioned control circuit 130 is disconnected, make luminous stopping (with reference to Figure 14 e, f).In addition, the lead-out terminal 150,140 of aforementioned control circuit 130 keeps disconnecting (with reference to Figure 14-c, d) between this light emission period.
Like this, in the flash unit of second kind of form of implementation of the present invention, switch with the break-make of relay switch 260 by luminous switching, in required time shutter of photography when faster than the flashlamp tuning period of above-mentioned focal-plane shutter, it is luminous to make it to carry out astigmatism, does not use main capacitor 17, when the required time shutter of photography is identical and slower than flashlamp tuning period with the flashlamp tuning period of above-mentioned focal-plane shutter, use main capacitor 17, can carry out optionally luminous.In addition, prior to this luminous carry out astigmatism luminous after, owing to the electric charge of main capacitor does not reduce, so, can carry out the luminous of big light quantity.
In addition, in second kind of form of implementation of the present invention, provide a kind of in required time shutter of photography when faster than the flashlamp tuning period of above-mentioned focal-plane shutter, do not use main capacitor, it is luminous to make it to carry out astigmatism, but it is self-evident, in required time shutter of photography when identical and slower than flashlamp tuning period with the flashlamp tuning period of above-mentioned focal-plane shutter, carry out the luminous occasion of astigmatism, it is luminous also can to carry out astigmatism with main capacitor, can be according to the shutter speed of focal-plane shutter, selection is supplied to the camera flash unit of the luminous source of supply of discharge tube.
In addition, when as mentioned above, the shutter time shutter is when slower than flashlamp tuning period, and it is luminous to carry out astigmatism, there is no need to wait for the duration of charging.
The effect of invention:
According to the present invention described above, can provide a kind of when the time for exposure than focal-plane shutter When the flash lamp tuning period is fast, can not need the main capacitance device in charging interval, only Yong the power supply electricity The pond also can the luminous flash unit of astigmatism, can reduce losing the best camera can possibility The property.
Symbol description
10 ... focal-plane shutter
20,100 ... battery (second lighting means)
30,130 ... control circuit (controlling organization)
60,240 ... oscillation transformer
12,12A ... glow discharge tube (Xe pipe)
17 ... main capacitance device (first lighting means)
Claims (4)
1, the flash unit used of a kind of camera, it has emission and is used to shine discharge tube by the flash light of photo-object, it is characterized by to comprise:
The energy that utilization is put aside on the main capacitor makes the first luminous illuminating part of above-mentioned discharge tube;
Need not above-mentioned main capacitor and only utilize battery to make above-mentioned discharge tube carry out repeatedly the second luminous illuminating part;
Focal-plane shutter; And
Control part, the control mode of described control part is, when photography is slower than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, utilize above-mentioned first illuminating part to make above-mentioned discharge tube luminous, when photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, utilize above-mentioned second illuminating part to make above-mentioned discharge tube luminous.
2, the flash unit used of a kind of camera in having the camera of focal-plane shutter, is characterized by and comprises:
Oscillation transformer;
The luminous discharge tube with the cycle interlock of above-mentioned oscillation transformer; And
Control part, described control part during exposing, proceeds the luminous of above-mentioned oscillation transformer when photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter.
3, the flash unit used of a kind of camera in having the camera of focal-plane shutter, is characterized by and comprises:
Emission is used to shine the discharge tube by the flash light of photo-object,
Make the first luminous illuminating part of above-mentioned discharge tube,
Make the second luminous illuminating part of above-mentioned discharge tube; And
Control part, described control part is controlled, and makes
When photography with the time shutter when slower than the flashlamp tuning period of above-mentioned focal-plane shutter, undertaken by above-mentioned first illuminating part luminous,
When photography is faster than the flashlamp tuning period of above-mentioned focal-plane shutter with the time shutter, undertaken luminous by above-mentioned second illuminating part.
4, the flash unit used of camera as claimed in claim 3 is characterized by, above-mentioned first illuminating part be make supply with savings in capacitor energy and carry out luminously, above-mentioned second illuminating part is to make to carry out luminous with the cycle interlock of oscillation transformer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002204367A JP2004045864A (en) | 2002-07-12 | 2002-07-12 | Electronic flash device for camera |
| JP204367/2002 | 2002-07-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1472588A true CN1472588A (en) | 2004-02-04 |
| CN100356265C CN100356265C (en) | 2007-12-19 |
Family
ID=30437386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031458246A Expired - Fee Related CN100356265C (en) | 2002-07-12 | 2003-07-11 | Camera flash |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004045864A (en) |
| CN (1) | CN100356265C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860685A (en) * | 2009-04-09 | 2010-10-13 | 奥林巴斯映像株式会社 | Camera head |
| CN102595749A (en) * | 2012-01-06 | 2012-07-18 | 中国科学院上海光学精密机械研究所 | Pulse continuous dual-purpose high-speed photography lighting device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3127405B2 (en) * | 1991-03-19 | 2001-01-22 | 株式会社キジマ | Converter |
| KR100340942B1 (en) * | 1995-01-06 | 2002-11-30 | 삼성테크윈 주식회사 | Flash device charged within short time |
| JPH09320785A (en) * | 1996-05-29 | 1997-12-12 | Minolta Co Ltd | Flash charger |
| JPH10153814A (en) * | 1996-09-30 | 1998-06-09 | Fuji Photo Film Co Ltd | Stroboscopic circuit |
| JP2001174882A (en) * | 1999-12-14 | 2001-06-29 | Canon Inc | Flashing device and camera provided with the device |
-
2002
- 2002-07-12 JP JP2002204367A patent/JP2004045864A/en not_active Withdrawn
-
2003
- 2003-07-11 CN CNB031458246A patent/CN100356265C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860685A (en) * | 2009-04-09 | 2010-10-13 | 奥林巴斯映像株式会社 | Camera head |
| CN101860685B (en) * | 2009-04-09 | 2012-07-18 | 奥林巴斯映像株式会社 | Camera device |
| CN102595749A (en) * | 2012-01-06 | 2012-07-18 | 中国科学院上海光学精密机械研究所 | Pulse continuous dual-purpose high-speed photography lighting device |
| CN102595749B (en) * | 2012-01-06 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Pulse continuous dual-purpose high-speed photography lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100356265C (en) | 2007-12-19 |
| JP2004045864A (en) | 2004-02-12 |
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