JPH0643524A - Optical device - Google Patents

Abstract

PURPOSE:To improve quick photographing property and consective photographing speed by charging one capacitor and also charging the other capacitor. CONSTITUTION:A means which charges the capacitor 503(15) while charging the capacitor 15(503) is provided and the capacitor 15 and auxiliary capacitor 503 in a camera are charged alternately to emit light. Further, an accessory 500 is fitted to the camera body 600 and when the capacitor 15 and auxiliary capacitor 503 in the camera body 600 are connected and used, a voltage level for charging completion is lowered to perform control. The camera body 600 is provided with a detecting means 28 which detects the fitting of the accessory 500 and a switch means which cuts off connections between at least the high- voltage part 4 of a stroboscopic capacitor in the camera and camera-side connectors g1-g4; only when the accessory 500 is fitted to the camera body 600, the stroboscopic capacitor 15 in the camera and the camera-side connectors are electrically connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as an observation instrument and a camera, and more particularly to an optical device including a light emitting device such as a strobe device.

[0002]

2. Description of the Related Art In recent years, an increasing number of cameras have a built-in strobe device. With such a camera, it is possible to shoot using strobe light without having to carry an external strobe. The convenience of is greatly improved. However, the strobe device built into these devices is usually limited to a very small one due to the space limitation inside the camera, and when a certain amount of light is required, Even so, I had to use an external strobe. As a method of solving such a problem, the applicant of the present invention has proposed a camera configured so that an auxiliary capacitor is externally attached to a camera with a built-in strobe and the capacitor in the camera body and the auxiliary capacitor can be connected. . With this configuration, the size of the external unit is not as large as the external strobe, and since the charging capacity of the strobe device is increased, the amount of emitted light can be made comparable to that of the external strobe. It is possible.

[0003]

In order to put the above-mentioned camera system using an auxiliary capacitor into practical use, the following problems still have to be solved.

(I) In the above method, when the auxiliary capacitor is used in a state where it is connected to the camera body, a large-capacity capacitor is always used. The problem that the required time becomes long arises. For this reason, if a large amount of light emission is not required, the result is that the rapidity is impaired.

(Ii) In the above-mentioned method, since the high voltage portion of the strobe capacitor in the camera body communicates with the connection portion between the camera and the accessory, when the accessory device is not attached to the camera body, the camera alone is used. , There was a risk of electric shock if you accidentally touch the connection while the strobe capacitor is charged.

An object of the present invention is to provide a practical camera system (that is, an optical device) that solves the problems (i) and (ii) described above.

[0007]

[Means for Solving the Problems]

(A) An improved photographing apparatus according to the present invention, in order to solve the above-mentioned problems, means for selectively emitting and discharging either a capacitor in a camera body or an auxiliary capacitor,
By providing a means for charging one capacitor while the other capacitor is discharging, the in-camera capacitor and the auxiliary capacitor are alternately charged and emitted.

(B) In the improved photographing apparatus according to the present invention, when the accessory is attached to the camera body and the condenser and the auxiliary condenser in the camera body are connected and used, the voltage level for completion of charging is lowered and controlled. Configured to be able to.

(C) In the improved photographing apparatus according to the present invention, at least a connector for connecting the high voltage portion of the strobe capacitor in the camera body and the high voltage portion of the auxiliary capacitor in the accessory are provided in the camera body and the accessory, respectively. At the same time, the camera body is provided with detection means for detecting attachment of the accessory and switch means for disconnecting at least the high voltage part of the strobe capacitor in the camera and the connector on the camera side. The strobe capacitor in the camera and the connector on the camera side are electrically connected only when it is attached to the.

[0010]

[Action]

(A) Since the improved photographing apparatus according to the present invention is configured as described in (a) above, the capacity of the condenser used for one emission is the same as when the single camera with built-in flash is used. The time required for charging can be set to about the same as when using a single camera with a built-in strobe, and when one capacitor is emitting light, the other can be charged at the same time. Compared with the time, it is possible to greatly shorten the light emission interval, and it is possible to improve the quick shooting property and the continuous shooting speed.

(B) In the improved image pickup apparatus according to the present invention, by being configured as in the above (b), the charging completion level is lowered in the state where the condenser capacity is increased as compared with the case where the camera with a built-in strobe is used alone. Since it is possible to secure the same emission energy as when using a single camera with a built-in flash, the charging time can be shortened when a large amount of light is not required. Moreover, since the battery can be charged only by the required amount, the consumption of the battery can be suppressed and the running cost can be reduced.

(C) According to the photographing apparatus of the present invention configured as described above in (c), when the strobe of the camera is used without the camera body with built-in strobe attached, the camera is inadvertently used. There is no risk of electric shock even if you touch the connector of the main body, so you can use it with confidence.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

First, the mechanical structure of a photographing device as an embodiment of the optical device of the present invention will be described.

<Mechanical Structure of Photographing Apparatus as One Embodiment of Optical Apparatus of the Present Invention> FIGS. 7 to 12 show a single-lens reflex camera as one embodiment of the present invention. First, the structure of the camera will be described with reference to FIGS. 7 to 12, reference numeral 1 denotes a single-lens reflex camera body with a built-in strobe. 2 is an accessory attached to the camera body. The structure of the camera 1 will be described below with reference to FIGS. 7 and 9 and FIGS. 10 and 12. 1a is a grip portion, 1b is a mount for mounting a photographing lens (not shown), 1
c is a front cover.

A built-in strobe light emitting portion 3 is provided on the upper portion of the main body 1.
Is provided. 7 and 8 show a state in which the light emitting unit 3 is popping up, and when not in use, it can be stored in a position (not shown) hidden behind the front cover 1c. Inside the light emitting section 3, a light emitting tube 3a and a light diffusing plate 3b are attached to the front surface thereof. Reference numeral 4 is a strobe circuit built in the camera body side. Reference numeral 4a is a main condenser for light emission, which is housed inside a film winding cylinder of a camera (not shown). Below the strobe circuit 4, a connector 4 for supplying electric charge to the camera and for communication is provided.
c is provided and is attached at a position retracted from the opening 1d provided at the bottom of the main body 1. Reference numeral 5 denotes a switch for identifying attachment of an accessory, which is provided at a position facing the opening 1e for accessory determination provided in the main body 1. 1f is a screw part for attaching an accessory or a tripod.

Next, the structure of the accessory 2 will be described with reference to FIGS. 8, 11 and 12.

The outer box 2a of the accessory 2 is provided with a discrimination pin 2b for transmitting the type of accessory to the camera body side. Inside the accessory 2, a sub-circuit 6 for supplementarily supplying electric charges to the strobe 3 incorporated in the camera body is incorporated. 6a is an auxiliary condenser for stroboscopic light emission. Reference numeral 7 denotes a mounting screw, which includes a screw portion 7a that engages with the camera body, a rotation operation portion 7b, and a shaft 7c.
The transmission gear 7d is integrally formed, and the movement in the axial direction is restricted by the base plate 8 and the retaining ring 7e, but the transmission gear 7d is rotatable. Reference numeral 9 denotes a friction first gear, which meshes with the rotation transmission gear 7d of the mounting screw 7.
Reference numeral 10 is a friction second gear, which is integrally formed with a gear portion 10a and a shaft 10b, and is rotatably sandwiched between a base plate 8 and an upper base plate 11. Reference numeral 12 denotes a friction spring, which is arranged between the stop ring 13 and the friction first gear 9 in a compressed state and transmits a compression force to the friction first gear 9. Further, the first gear 9 can transmit this compression force to the friction second gear 10, and can rotate integrally with the second gear due to the frictional force generated between the first gear 9 and the second gear 10. At the same time, it is possible to rotate around the second gear shaft 10b. Reference numeral 14 denotes a clutch gear, which is movable in the axial direction from a position where it meshes with the gear portion 14a and the gear portion 10a of the second gear to a position where it disengages.
It is designed to maintain meshing with (described later). The drive gear 15 is composed of a spur gear portion 15a and a worm gear portion 15b. The worm gear portion 15b meshes with the worm gear portion 16a of the connector 16. Also,
The connector 16 has a connection pin 16 for transmitting the electric charge of the auxiliary condenser 6a to the camera body side and for performing communication.
b is planted. The pin 16b is connected to the strobe circuit 6 by a lead wire 17. The outer periphery 16c of the connector 16 is fitted with a cylindrical wall 2c provided inside the outer box 2a. Reference numeral 16e is a groove for preventing rotation. Rotation of the connector 16 in the rotational direction is restricted by the groove 16e and a rib 2d provided in a part of the wall 2c, and the connector 16 can move only in the vertical direction.

Reference numeral 18 denotes an attachment / detachment detection pin, which can be moved up and down between a guide plate 19 attached to the side wall of the rib 2d and the outer box 2a. The upper end 18a of the detection pin 18 is usually the outer box 2a.
Protruding from. Reference numeral 20 is a lever, which is rotatable around a shaft 20a. Reference numeral 21 is a return spring, one end of which is a protruding bending portion 20b of the lever 20 on the protruding portion 8a of the base plate.
The other end of the lever is hung, and the lever 20 is biased clockwise. Since the upper left end 20c of the lever 20 is in contact with the lower end 18b of the detection pin 18 described above, the lever 20 always tries to push the detection pin 18 upward.

The lower left end 20d of the lever 20 is the lever 2
When 0 rotates counterclockwise, the attachment / detachment detection switch 22 is pushed down. Further, a leaf spring 23 is fixed to the arm portion of the lever 20, and the tip portion 23a has a shaft 14 of the clutch gear 14.
It is inserted into a groove 14c provided in b, and pushes the clutch gear 14 downward. Therefore, the transmission between the clutch gear 14 and the second gear 10 is separated. There is a notch 20e in the upper portion of the lever 20, and the drive portion 24b of the connector cover 24 is sandwiched between the notches 20e. The cover 24 is rotatable around the shaft 24b with respect to the outer box 2a.

A state in which the accessory 2 is attached to the camera body 1 in the above configuration will be described with reference to FIGS. 10 and 12.

When the accessory 2 is attached to the camera body 1, the discrimination pin 2 is inserted into the body opening 1e, and the camera body 1 and the accessory 2 are positioned. At this time, the accessory discriminating switch 5 is pushed up to notify that the accessory is attached to the camera body side. At the same time, the upper end 18a of the attachment / detachment detection pin 18 is pushed down by the bottom of the camera body 1, and the lower end 18b of the left end 20 of the lever 20.
Press c down. Therefore, the lever 20 turns counterclockwise around the shaft 20a against the biasing force of the return spring 21. The lower left end 20d of the lever 20 pushes down the attachment / detachment detection switch 22 provided inside the accessory, and notifies the accessory side that it is in the attached state. Further, since the lever 20 moves the drive portion 24a of the connector cover 24 to the left, the cover 24 rotates clockwise around the rotation shaft 24b, and the connector 16 on the accessory side is exposed. The leaf spring 23 fixed to the lever 20 is used for the clutch gear 1
4 is moved up to a position where it meshes with the second friction gear 10. However, it remains in mesh with the drive gear 15.

Thereafter, by turning the tightening operation member 7b counterclockwise in FIG. 9, the attachment screw hole 1f on the camera body side is engaged with the attachment screw 7a on the accessory side. At this time, since the transmission gear 7d rotates counterclockwise integrally with the rotation operation portion 7b, the friction first gear 9 rotates clockwise. The friction second gear 10 is the first gear 9
Rotate clockwise due to friction with. Clutch gear 1
Since 4 is pushed upward by the leaf spring 23, it is in mesh with the second gear 10, and is rotated counterclockwise by the transmission of the second gear. Since the drive gear 15 is always in mesh with the clutch gear 14, the drive gear 15 rotates clockwise. Accordingly, the connector 16 has its worm gear portion 16
Since a and the worm gear portion of the drive gear mesh with each other, they ascend along the cylindrical wall 2c provided inside the accessory outer box and project from the accessory outer box 2a. Then, the connection pin 16b starts to be inserted into the connector 4c on the camera body side. After that, the stopper 16d hits the wall 2c, the further rise is stopped, and the connection of the connector is completed. However, since the stroke required for the tightening operation is set to be longer than the stroke required for connecting the connector, the rotation operating member 7b must be further rotated continuously.
Since the 0, 14, and 15 gears also stop rotating, the friction first gear 9 and the second gear 10 start to slip,
Therefore, the first gear idles, the tightening operation is completed without breaking other gears, and the accessory 2 is attached to the camera body 1.

On the contrary, when the accessory 2 is detached from the camera body 1, it is detached by the completely reverse operation described above, but the detaching stroke of the mounting screw 7a is longer than the stroke required for detaching the connector at this time as well. Since it is set to be,
After the removal of the connector is completed, the fastening screw 7a and the screw hole 1 are disengaged. After the engagement is released, the camera body 1 and the accessory 2 are disengaged, the lever 20 is rotated clockwise by the return spring 21, and the clutch gear 1 is released.
4 is pushed downward by the leaf spring 23, disengages from the friction second gear 10, and returns to the initial state.

The mechanical structure described above is common to several embodiments relating to the electrical structure of the optical device of the present invention described below.

In the following, an embodiment of the electrical structure of the optical device of the present invention including the structure that is the subject of the present invention will be described.

<Embodiment of Electrical Configuration of Optical Device of the Present Invention><FirstEmbodiment> FIG. 1 is a circuit block diagram showing a first embodiment of the present invention. In FIG. 1, 600 is a camera body,
Reference numeral 1 is a power switch, 2 is a power battery, 3 is a constant voltage source for generating a constant voltage _Vcc from the power battery 2, and 4 is a booster circuit for boosting a known battery voltage to a high voltage.

A high-voltage rectifying diode 5 rectifies the output of the booster circuit 4.

Reference numeral 15 is a main capacitor, which is a capacitor for storing light emission energy, and a diode 14 is connected to the main capacitor 15 for blocking current.

Reference numerals 6 and 7 are resistors for detecting the charging voltage of the main capacitor 15, 8 and 9 are capacitors of the charging voltage detecting circuit, and the divided voltage of the resistors 6 and 7 is output as the voltage detecting signal sen1 of the main capacitor. It

Reference numeral 100 is a voltage detecting section.

Reference numeral 10 is a diode, which rectifies the high voltage AC output voltage of the booster circuit 4, 11 and 12 are resistors for detecting the charging voltage of the auxiliary capacitor 503 in the accessory, and 13 is an AC of the charging voltage detecting circuit. It is a passing capacitor. The voltage division of the resistor 11 is input to the flash control circuit 33 described later as a voltage detection output of the capacitor 503.

Reference numeral 200 is a charging voltage detection circuit for the auxiliary capacitor 503 in the accessory.

Reference numeral 16 is a resistor, 17 is a light emitting thyristor, 1
The resistors 8 and 19 are connected to the gate of the thyristor 17 by resistors. Reference numeral 20 is a capacitor for triggering light emission, which is connected to the anode of the thyristor 17 and the resistor 16. Reference numeral 21 is a transformer for a light emission trigger, and the capacitor 20 is connected to the primary side.

Reference numeral 300 is a light emitting circuit section.

22 is a limiting coil, 23 is a flash discharge tube,
The limiting coil 22 is connected to the anode.

Reference numeral 24 is a subthyristor for stopping light emission, the anode is connected to the anode of the flash discharge tube 23, and the resistors 25 and 26 are connected to the gate. Reference numeral 400 is a light emission stop circuit unit.

29 is an SPD, 30 is a known dimming circuit,
When the ST signal input changes from a low level (abbreviated as LL below) to a high level (abbreviated as HL), charging of a photometric integration capacitor (not shown) for dimming is started, and when the proper exposure is reached, the SP signal output is HL. The change from LL to LL notifies the flash control circuit of the stop of light emission.

Reference numeral 31 is a display circuit, which displays a charge display and accessory connection. 32 is an X contact (not shown). Three
A flash control circuit 3 detects the charging voltage of the main capacitor 15 and the auxiliary capacitor 503, controls the charging, controls the emission and stop of emission of the flash discharge tube 23, and outputs the display circuit.
Performs X-contact detection and accessory mounting detection. 33 also includes a microcomputer and a latch circuit. The flash control circuit 33 is connected to the booster circuit 4 through the OSC output terminal and boosts the voltage at the OSC terminal HL. A constant voltage _Vcc is input from the constant voltage circuit 3 to serve as a power source.

The flash control circuit 33 detects the charging state by taking in the divided voltage value of the voltage drop of the resistors 6 and 7 of the charging detection unit 100 at the sen1 terminal.

Further, from the STCR terminal, the light emitting circuit section 300
The thyristor 17 is turned on by being connected to the gate of the light emitting thyristor 17 via the resistor 19 and outputting a pulse waveform from the SPCR terminal of the flash control circuit 33.

The SPCR terminal of the flash control circuit 33 is connected to the gate of the light emission stopping thyristor 24 via the resistance 26 of the light emission stopping circuit section 400, and the thyristor 24 is turned on by outputting a pulse waveform from the SPCR terminal. ing.

The ST and SP signals of the flash control circuit 33 are connected to the light control circuit 30 to start and stop the light control (stop light emission). The SG signal terminal is V _cc when the accessory with built-in auxiliary capacitor is not connected, and HL is input when the accessory with built-in auxiliary capacitor is connected to the detection signal terminal where HL is input via the resistor 27. Recognize that 503 is connected.

Reference numeral 500 denotes the accessory that is detachably attached to the camera body, and the accessory 500 is attachable to and detachable from the camera body by the structure described above. Connector G ₁ ~G ₄ for electrically connecting the electronic flash circuit in the camera main body is provided on the accessory 500, the connector G ₁ ~G ₄ is connected to the connector g ₁ to g ₄ of the camera body It An auxiliary capacitor 503, a diode 501 for controlling charging / discharging of the capacitor 503, and a thyristor 504 are provided in the accessory 500, and the anode side of the diode 501 is connected to the cathode of the diode 10 in the camera body.

Reference numeral 504 denotes a discharge control thyristor for the auxiliary capacitor 503, and the gate 50 of the thyristor 504.
A one-shot circuit 520 is connected to the gate of the thyristor 504 for controlling the gate of the thyristor 504. The thyristor 5
04 is turned on by a one-shot pulse applied to the gate from the one-shot circuit 520, and starts discharging the auxiliary capacitor 503.

The circuit components of the one-shot circuit 520 will be described below. 505 is a resistor, 506 is a capacitor, 507 and 508 are resistors, 509 is a bidirectional thyristor, 510 and 511 are resistors, and the gate of the bidirectional thyristor 509 is inside the camera body via connectors G ₃ and g ₃ . Is connected to the CTR terminal of the flash control circuit 33, and a one-shot pulse is generated by the ON output of the CTR terminal.

Next, the operation will be described.

FIG. 2 shows a flowchart regarding the operation. I will explain based on this.

When the power switch SW1 of No. 1 is turned on, the power battery 2 is connected to the constant voltage circuit 3, and the constant voltage circuit 3 outputs the constant voltage circuit _Vcc . As a result, power is supplied to the _Vcc terminal of the control circuit 33. Then, the latch circuit of the control circuit 33 is reset to the initial state. <Steps # 1 and # 2> Next, it is determined whether or not the switch 28 for determining whether the accessory having the built-in auxiliary capacitor is attached is turned on. <Step # 3> When the switch 28 is off, the control circuit 33 is turned on. Step # 6 because HL is input to the GS terminal of
If it is turned on, LL is input to the GS terminal of the control circuit 33, and the GE bit indicating that the power grip is attached is set to "1". <Step # 4> (Holding by Latch Circuit in Control Circuit 33) A signal is sent from the DP terminal of the control circuit 33 and the display circuit 31 indicates that the accessory is attached. <Step # 5> When a continuous shooting mode for performing continuous shooting is input (camera setting means (not shown) <step # 5-2>, proceed to step # 5-3, set MODE1 and set continuous shooting. If it is not in the photographing mode, proceed to step # 6, and after setting MODE1 in step # 5-3, proceed to step # 6.

Next, the voltage detection unit 100 detects the charging voltage charged in the main capacitor 15 and the capacitor 503 from sen1 of the control circuit 33 and detects the first voltage required for light emission.
It is determined whether the charging completion level (charging completion level 1) has been reached. <Step # 6> If the voltage is equal to or lower than the first charge completion voltage required for light emission (when uncharged), proceed to Step # 7.
Go to 8.

In step # 7, HL is output from the OSC terminal of the control circuit 33 to the booster circuit 4 to perform a boosting operation, and the main capacitor 15 and the capacitor 503 are charged via the diode 5 and the diode 14. <Step #
7> Then return to step # 6.

When the voltage of sen1 reaches the charge completion level 1 suitable for light emission, the latch circuit in the control circuit 33 sets s
"1" is stored in the bit CHG1 indicating the completion of charging of en1. <Step # 8> Next, it is determined whether or not the accessory is attached / detached. If GE = “1”, proceed to step # 102. If no accessory is attached, proceed to step # 12. <Step # 10
1> It is determined whether the voltage of sen2 (the voltage of the capacitor 503 in the accessory) has reached a certain voltage capable of emitting light <Step # 102> When it reaches a certain level or higher, the latch circuit in the control circuit 33 charges the sen2. "1" is stored in the completion bit CHG3. <Step # 10
3> In step # 12, the control circuit 33 determines whether the SWX (32) is pressed <step # 12>.

Next, the voltage detection unit 100 detects the charging voltage charged in the main capacitor and the auxiliary capacitor 503 by the sen1 of the control circuit 33, and determines whether the second charging completion level 2 which is the full charging level has been reached. <Step # 9>. When the charge completion level 2 has not been reached, the process returns to step # 7, and when it has reached the level, step # 17.
Go to. When the charge completion level 2 is reached Control circuit 3
The second charge completion of sen1 is latched by the latch circuit in 3 and "1" is stored in the CHG2 bit <Step #
10> Next, the OSC signal of the control circuit 33 is changed from HL to LL, and the operation of the booster circuit 4 is stopped. <Step # 11> When the SWX 32 is not pressed and the SW1 is pressed, the process returns to step # 3, and ends when the switch is off <step # 13>.

When the SWX 32 is pressed in step # 12, the light emitting / light adjusting operation of the next step is proceeded to.

When X is turned on, the charge detection latch of the control circuit 33 is first reset. <Step # 14> It is determined whether or not the continuous shooting mode is set. <Step # 104> If the continuous shooting mode is not set, the process proceeds to step # 201. If the continuous shooting mode is set, the process proceeds to step # 105.

The GE (accessory attachment / detachment flag) is reversed. <Step # 105> (Alternatively emits light) Oscillation is continued (OSC: HL) <Step # 105> When the charge completion level 1 of sen1 is equal to or higher than the level, go to step # 201. Proceed to step # 106. <Step # 107> Determine whether or not an accessory is attached and GE = 1
If so, proceed to step # 202. If GE = 0, proceed to step # 15. <Step # 201> The CTR terminal of the control circuit 33 outputs LL → HL, a gate pulse is applied from the one-shot pulse circuit 520 to the gate of the thyristor 504 via the connectors g ₃ and G ₃ , and the thyristor 504 is turned on. . <Step # 202> As a result, the main capacitor 15 and the auxiliary capacitor 503 are connected via the thyristor 504.

In the one-shot circuit 520, the CT
The bidirectional thyristor 509 is turned on via the resistor 510 by the R terminal output, and the thyristor 504 is turned on by the capacitor 506 and the resistor 507.

Next, S of the control circuit 33 which is a dimming start signal.
The T signal is changed from LL to HL to start dimming. <Step # 15> The light emission start signal is output as a pulse from the STCR terminal of the control circuit 33. <Step # 16> As a result, the thyristor 17 is turned on through the resistor 19, the charge of the capacitor 20 charged at the time of boosting is discharged, and the pulse is input to the primary side of the transformer 21, and the high voltage pulse is further input to the secondary side of the transformer. Occurs, the internal light discharge tube 23 is triggered to emit light. <Step # 17> The emitted light is reflected by the subject (not shown) and the light is SP
As a result of receiving the light at D29, it is determined whether or not the light amount has reached an appropriate amount <Step # 18> When it is determined to be appropriate, the SP signal output which is the light emission stop signal from the light control circuit 30 is HL.
Changes to LL, and the control circuit 33 stops emitting light.
<Step # 19> Next, a pulse was output from the SPCR terminal of the control circuit 33 to stop the light emission. <Step # 20> When the thyristor 24 is turned on via the resistor 26, the charges emitted from the main capacitor 15 and the capacitor 503 are bypassed, and the light emission is stopped. <Step # 21> It is determined whether the continuous shooting mode is set <Step # 22>. If the continuous shooting mode is selected, the process proceeds to step # 12. If the continuous shooting mode is not set, the process returns to step # 1.

<Second Embodiment> FIG. 2 shows a second embodiment of the electrical construction of the image pickup apparatus of the present invention. This embodiment is different from the first embodiment only in that the lens information detection circuit 34 is connected to the input / output port of the flash control circuit 33 in the circuit configuration of the first embodiment. Therefore, description of components other than the circuit 34 will be omitted.

The lens information detection circuit 34 exchanges information unique to the interchangeable lens mounted on the camera body and information (focal length and zoom lens position) of the optical system (focusing lens and zoom lens) in the interchangeable lens. It is a circuit that receives from a detector or memory in the lens or detects necessary information, and includes a control circuit in the interchangeable lens.

In the present embodiment, the output of the lens information detection circuit 34 is input as input information to the flash control circuit 33, and the flash control circuit 33 also performs flash control by also referring to the lens information. Most of the functions and operations are the same as those of the first embodiment shown in FIG. 1, but the entire functions and operations are different from those of the first embodiment.

The functions and operations in the configuration of this embodiment are shown in FIG.
This will be described below with reference to the flowchart shown in FIG.

When the first power switch SW1 is turned on, the power battery 2 is connected to the constant voltage circuit 3, and the constant voltage circuit 3 outputs the constant voltage circuit _Vcc . As a result, power is supplied to the _Vcc terminal of the control circuit 33. Then, the latch circuit of the control circuit 33 is reset to the initial state. <Steps # 1 and # 2> Next, the accessory 5 in which the capacitor 503 is incorporated.
It is determined whether the switch 28 for determining whether 00 is attached or not is turned on. <Step # 3> When the switch is turned off, HL is input to the GS terminal of the control circuit 33, and therefore the process proceeds to step # 6 and is turned on. When it is, LL is input to the GS terminal of the control circuit 33, and the GE bit indicating that the accessory 500 is attached is set to "1". <Step # 4> (Holding by Latch Circuit in Control Circuit 33) A signal is sent from the DP terminal of the control circuit 33 and the display circuit 31 indicates that the accessory is attached. <Step # 5> Next, the reference potential at the charge completion level is changed (lowered) <Step # 5-2>, and then the process proceeds to Step # 6. (The charge level is changed for both sen1 and sen2) Next, the control circuit 3 controls the charge voltage charged in the main capacitor 15 and the capacitor 503 by the voltage detector 100.
It is detected from sen1 of 3 and it is judged whether or not it has reached the first charge completion level (charge completion level 1) required for light emission.
<Step # 6> If the voltage is equal to or lower than the first charge completion voltage required for light emission (when uncharged), proceed to Step # 7, and if charge is completed, Step # 8
Go ahead.

At step # 7, the OSC of the control circuit 33 is
HL is output from the terminal to the booster circuit 4 to perform a boosting operation, and the main capacitor 15 and the capacitor 503 are charged via the diode 5 and the diode 14. <Step # 7> Then return to Step # 6.

When the voltage of sen1 reaches the charge completion level 1 suitable for light emission, the latch circuit in the control circuit 33 sets s
"1" is stored in the bit CHG1 indicating the completion of charging of en1. <Step # 8> Next, it is judged whether or not the accessory is attached / detached, and if GE = "1", proceed to step # 102. If the accessory is not attached, proceed to step # 9. <Step # 101> It is judged whether or not the voltage of sen2 (voltage of the capacitor 503 in the accessory) has reached a certain voltage capable of emitting light. <Step # 102> When it reaches a certain level or more, the latch circuit in the control circuit 33 is used. “1” is stored in the charge completion bit CHG3 of sen2. <Step # 10
3> Next, the charging voltage charged in the main capacitor 15 and the capacitor 503 by the voltage detection unit 100 is controlled by the control circuit 3
It is further detected from sen1 of 3 and it is judged whether or not it has reached the second charge completion level (charge completion level 2) which is the full charge level. <Step # 9> Step # 12 when the charge completion level 2 is not reached
If it has reached, proceed to step # 10. When the charge completion level 2 is reached, the latch circuit in the control circuit 33 latches the second charge completion of sen1 and CHG2
Store "1" in the bit. <Step # 10> Next, the OSC signal of the control circuit 33 is changed from HL to LL, and the operation of the booster circuit 4 is stopped. <Step # 11> Next, the control circuit 33 determines whether the SWX 32 is pressed <Step # 12>.

When SWX32 is not pressed, SW
When 1 is pressed, the process proceeds to step # 3, and when it is off, the process ends. <Step # 13> If the SWX 32 is pressed in step # 12, the next step of light emission / dimming operation is performed.

When X is turned on, the charge detection latch of the control circuit 33 is first reset. <Step # 14> Determine whether or not accessories are attached and GE = 1
, Go to step # 202, if GE = 0, no accessories, go to step # 15, <step # 201> The CTR terminal of the control circuit 33 outputs LL → HL, and the connectors g ₃ and G ₃ are output. Then, a gate pulse is input from the one-shot pulse circuit 520 to the gate of the thyristor 504, and the thyristor 504 is turned on. <Step # 202> As a result, the main capacitor 15 and the auxiliary capacitor 503 are connected.

Next, S of the control circuit 33 which is a dimming start signal.
The T signal is changed from LL to HL to start dimming. <Step # 15> The light emission start signal is output as a pulse from the STCR terminal of the control circuit 33. <Step # 16> As a result, the thyristor 17 is turned on via the resistor 19, the charge of the capacitor 20 charged at the time of boosting is discharged, and the pulse is input to the primary side of the transformer 21, and the high voltage pulse is further input to the secondary side of the transformer. Is generated, the internal light discharge tube 23 is triggered to emit light. <Step # 17> The emitted light is reflected by the subject (not shown) and the light is SP
As a result of the light reception at D29, it is judged whether or not the light quantity has reached an appropriate amount <Step # 18> When it is judged to be proper, the SP signal output which is the light emission stop signal from the light control circuit 30 changes from HL to LL and the light emission to the control circuit 33 is stopped. <Step # 19> Next, in order to stop the light emission, a pulse is output from the SPCR terminal of the control circuit 33, and <Step # 20> the thyristor 24 is turned on via the resistor 26 to turn on the main capacitor 15 and the capacitor 503. Voltage is bypassed and light emission stops. <Step # 21> Then, return to Step # 1.

<Third Embodiment> Next, with reference to FIGS. 5 and 6, a third embodiment of the electrical construction of the photographing apparatus of the present invention will be described.

In this embodiment, as can be seen from FIG. 5, no circuit element other than the auxiliary capacitor 503 is provided in the accessory 500, and the strobe control circuit in the camera body does not include the auxiliary capacitor 503. Charging diode (diode 10 shown in FIG. 1) and charging voltage detection circuit (resistors 11 and 12 and capacitor 1 shown in FIG. 1)
3) is not provided either.

Further, since the circuit for charging and discharging the auxiliary capacitor 503 is shared, only _two connectors, g ₂ and g ₄ , on the accessory mounting surface of the camera body are used. There are only _two connectors on the mounting surface, G ₂ and G ₄ .

Since all the other constituent elements are the same as those described in the above embodiment, the description thereof will be omitted.

Next, the operation of the flash control circuit 33 in the circuit configuration of this embodiment and the function of the configuration of this embodiment will be described below with reference to the flowchart of FIG.

When the power switch SW1 of 1 is turned on, the power battery 2 is connected to the constant voltage circuit 3 and the constant voltage circuit 3 outputs the constant voltage circuit _Vcc . As a result, V of the control circuit 33
Power is supplied to the _cc pin. Then, the latch circuit of the control circuit 33 is reset to the initial state. <Step #
1, # 2> Next, it is determined whether or not the switch 28 for determining whether or not the accessory is attached is on. <Step # 3> When it is off, HL is input to the GS terminal of the control circuit 33. Proceed to step # 6, and if it is on, HL is input to the GS terminal of the control circuit 33, so proceed to step # 6, and if it is on, GS of the control circuit 33.
LL is input to the terminal and the GE bit indicating that the accessory is attached is set to "1". <Step # 4>
(Holding by Latch Circuit in Control Circuit 33) A signal is sent from the DP terminal of the control circuit 33 and the display circuit 31 indicates that the accessory is attached. <Step # 5> Next, the charging voltage charged in the main capacitor 15 and the capacitor 503 by the voltage detection unit 100 is controlled by the control circuit 3
It is detected from sen1 of 3 and it is judged whether or not it has reached the first charge completion level (charge completion level 1) required for light emission.
<Step # 6> When the voltage is equal to or lower than the first charge completion voltage required for light emission (when uncharged), the process proceeds to step # 17, and when the charge is completed, step # 6
Go to 8.

In # 7, HL is output from the OSC terminal of the control circuit 33 to the booster circuit 4 to perform the boosting operation, and the main capacitor 1 is passed through the diode 5 and the diode 14.
5, the capacitor 503 is charged. <Step # 7>
Then, return to step # 6. When the voltage of sen1 reaches the charge completion level 1 suitable for light emission, "1" is stored in the charge completion bit CHG1 of sen1 by the latch circuit in the control circuit 33. <Step # 8> Next, the charging voltage charged in the main capacitor 15 and the capacitor 503 by the voltage detection unit 100 is controlled by the control circuit 3
It is further detected from sen1 of 3 and it is judged whether or not it has reached the second charge completion level (charge completion level 2) which is the full charge level. <Step # 9> Step # 12 when the charge completion level 2 is not reached
If it has reached, proceed to step # 10. When the charge completion level 2 is reached, the latch circuit in the control circuit 33 latches the second charge completion of sen1 and CHG2
Store "1" in the bit. <Step # 10> Next, the OSC signal of the control circuit 33 is changed from HL to LL, and the operation of the booster circuit 4 is stopped. <Step # 11> Next, the control circuit 33 determines whether or not the SWX32 is pressed. <Step # 12> If the SWX32 is not pressed and the SW1 is pressed, the process proceeds to step # 3. To do.
<Step # 13> If the SWX 32 is pressed in step # 12, the next step of light emission / dimming operation is performed. When X is turned on, the charge detection latch of the control circuit 33 is first reset.
<Step # 14> Next, the ST signal of the control circuit 33, which is the dimming start signal, is set to LL.
→ Set to HL and start dimming. <Step # 15> The light emission start signal is output as a pulse from the STCR terminal of the control circuit 33. <Step # 16> As a result, the thyristor 17 is turned on via the resistor 19, the charge of the capacitor 20 charged at the time of boosting is discharged, and the pulse is input to the primary side of the transformer 21, and the high voltage pulse is further input to the secondary side of the transformer. Is generated, the internal light discharge tube 23 is triggered to emit light. <Step # 17> The emitted light is reflected by the subject (not shown) and the light is SP
As a result of the light reception at D29, it is judged whether or not the light quantity has reached an appropriate amount <Step # 18> When it is judged to be proper, the SP signal output which is the light emission stop signal from the light control circuit 30 changes from HL to LL and the light emission to the control circuit 33 is stopped. <Step # 19> Next, in order to stop the light emission, a pulse is output from the SPCR terminal of the control circuit 33, and <Step # 20> the thyristor 24 is turned on via the resistor 26 to turn on the main capacitor 15 and the capacitor 503. Voltage is bypassed and light emission stops. <Step # 21> Then, return to Step # 1.

[0076]

【The invention's effect】

(A) In the improved photographing apparatus according to the present invention, since the capacity of the condenser used for one light emission is the same as that when the camera with a built-in strobe is used alone, since it is configured as shown in FIG. 1 and FIG. The time required for charging can be set to about the same as when using a single camera with a built-in strobe, and when one capacitor is emitting light, the other can be charged at the same time. Compared to the time, the light emission interval can be made much shorter,
It is possible to improve the quick shooting property and the continuous shooting speed.

(B) In the improved photographing apparatus according to the present invention, the constitution as shown in FIG. 3 and FIG. 4 makes it possible to lower the charge completion level in the state where the condenser capacity is increased, as compared with the case where the built-in flash camera is used alone. Even if the flash built-in camera is used alone, the same light emission energy can be secured, so that the charging time can be shortened when a large amount of light is not required. Moreover, since the battery can be charged only by the required amount, the consumption of the battery can be suppressed and the running cost can be reduced.

(C) According to the photographing apparatus of the present invention configured as shown in FIGS. 7 to 12, when the strobe of the camera is used without the accessory attached to the camera body with the strobe, the caretaker is inadvertently used. Even if a finger is touched on the connector of the camera, there is no fear of electric shock, and therefore the camera can be used with peace of mind.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the electrical configuration of an optical device of the present invention.

2 is a flowchart showing functions and operations in the configuration of FIG.

FIG. 3 is a diagram showing a second embodiment of the electrical configuration of the optical device.

4 is a flowchart showing functions and operations in the configuration of FIG.

FIG. 5 is a diagram showing a third embodiment of the electrical configuration of the optical device.

FIG. 6 is a flowchart showing functions and operations in the configuration of FIG.

FIG. 7 is a partially cutaway front view of a strobe built-in single lens reflex camera as an optical device of the present invention.

FIG. 8 is a partially cutaway front view of an accessory as a part of the optical device of the present invention.

FIG. 9 is a partially cutaway top view of the accessory when the accessory is not attached to the single-lens reflex camera.

FIG. 10 is a partially cutaway top view of the accessory in a state where the accessory is attached to the single-lens reflex camera.

FIG. 11: Connector of the accessory (electrical connection terminal)
The figure which showed the structure of a part.

FIG. 12 is a partially cutaway front view showing a state where the accessory is attached to the camera.

[Explanation of symbols]

(FIGS. 1, 3, and 5) 1 ... Power switch 2 ... Power supply 3 ... Constant voltage circuit 4 ... Booster circuit 5, 14 ... Diodes 6, 7, 11, 12
... Voltage detecting resistors 8, 9, 13 ... Voltage detecting capacitor 15 ... Main capacitor 17 ... Light emission starting thyristor 21 ... Light emitting tube trigger transformer 23 ... Light emitting tube 24 ... Light emission stopping thyristor 28 ... Accessory mounting detection switch 29 ... photometry photodiode 30 ... light control circuit 31 ... display circuit 32 ... flash switch 33 ... flash control circuit 34 ... lens information detection circuit _{g 1 ~g 4, G 1 ~G} 4 ... connector 500 ... accessories 501 ... diodes 503 ... auxiliary Capacitor 504 ... Thyristor 509 ... Bidirectional thyristor 520 ... One shot circuit (gate drive circuit of thyristor 504) 600 ... Camera body (FIGS. 7-12) 1 ... Camera 2 ... Accessory 2a ... Accessory outer box 2b ... Pin 3 ... Strobe Light emitting part 3a ... Arc tube 3b ... Light spread Board 4 ... Strobe circuit 4a ... Main capacitor 4c ... Connector 5 ... Accessory discrimination switch 6 ... Sub circuit 6a ... Auxiliary capacitor 7 ... Mounting screw 9, 10, 15 ... Gear 14 ... Clutch gear 16 ... Connector 16b ... Connection pin 18 ... Accessory Attachment / detachment detection pin 20 ... Lever 21 ... Return spring 22 ... Accessory attachment / detachment detection switch 23 ... Leaf spring 24 ... Connector cover

Claims (3)

[Claims] 1. An optical device body containing a light emitting device body including a light emitting tube and a main capacitor for supplying electric charge to the light emitting tube, and an auxiliary capacitor connected to the light emitting device body and the optical device body. In an optical device having an accessory configured to be attachable to and detachable from an apparatus main body, a charge state detection unit that detects a charge state of the main capacitor and the auxiliary capacitor, and the accessory is attached to the optical device main body. In the state, when the light emitting device body is used, a capacitor control means for discharging one of the capacitors and charging the other capacitor according to the detection result of the charge state of the both capacitors is provided. An optical device characterized in that 2. An optical device body containing a light emitting device body including a light emitting tube and a main capacitor for supplying electric charge to the light emitting tube, and an auxiliary capacitor connected to the light emitting device body, and the optical device body. An optical device having an accessory configured to be attachable to and detachable from an apparatus main body, when the accessory is attached to the optical apparatus main body and the main condenser and the auxiliary condenser are connected, a use state of the optical apparatus And a charge completion level changing means for changing the charge completion level of at least one of the capacitors according to the above. 3. An optical device body containing a light emitting device body including a light emitting tube and a main capacitor for supplying electric charge to the light emitting tube, and an auxiliary capacitor connected to the light emitting device body, and the optical device body. In an optical device having an accessory configured to be attachable to and detachable from the device body, the optical device body is provided with a connector for connecting the light emitting device body and the main capacitor and the auxiliary capacitor, An optical device, characterized in that a switching means is provided for electrically connecting the main capacitor and the connector only when the accessory is attached to the optical device body.