JP2560295B2 - Camera with built-in flash - Google Patents

Description

The present invention relates to a camera with a built-in flash device to which an external flash device can be attached.

[Prior Art] Conventionally, a camera of this type has been proposed. However, in order to increase the light emission amount, when an external flash is attached and the internal flash is made to be capable of emitting light, both cameras are released. The flashlight was designed to emit light.

[Problems to be solved by the invention]

However, in the above-mentioned camera, there is a case where the attached external flash unit cannot control the light emission from the camera side. Therefore, if both the built-in flash unit and the external flash unit emit light, proper exposure cannot be obtained. There was an occasion. Also,
Since the built-in flash unit and the external flash unit are different even when the flash unit is completely charged, the display of charging completion becomes complicated.

The present invention has been made in view of the above points, and an object thereof is to eliminate the inconvenience caused when an external flash unit is attached to a flash unit built-in camera.

[Means for solving problems]

For the above-mentioned purpose, in the present invention, when the built-in flash unit emits light, the emission of the external flash unit is prohibited.

[Action]

In the present invention, when the built-in flash unit emits light, the emission of the external flash unit is prohibited, so that proper exposure can be obtained even if the emission of the external flash unit cannot be controlled by the camera. Further, the charging completion display need not be complicated because it may be displayed only in the case of the built-in flash device.

〔Example〕

FIG. 1 is a perspective view of a camera with a built-in flash device. Reference numeral 1 denotes a camera body, and a flash body 40 is integrally attached to a central portion of an upper portion of the camera body 1. 41 is a holding member,
The entire body is formed in a substantially U shape to form a flash body 40. The front surface of the flash body 40 is a light emitting surface F. 10 is an accessory shoe to which an external flash device can be attached. Although not shown in FIG. 1, the accessory shoe 10 is provided with a contact electrically connected to an external flash unit.

Reference numeral 5 denotes a slide type knob provided on the upper surface of the flash body 40, and the flash body 40 can be moved to a use position by sliding it to the rear of the camera body 1 in FIG.

FIG. 2 is a side view of the camera with a built-in flash device. In FIG. 2, reference numeral 11 is an external flash device, which is attached to the accessory shoe 10.

The flash device main body 40 uses the rotation center O as its rotation center.
It is possible to rotate between the storage position A and the use positions B ₁ and B ₂ .

Here, the use position B ₁ is a normal light emission position where the light emitting surface F faces the object, and the use position B ₂ is a bounce light emission position where the lower surface of the light emitting surface faces upward of the object.

FIG. 3 is a view showing a II cross section of FIG. 2. Third
In the figure, 20 is a top cover, a solid rotation shaft 21 is provided on one side surface thereof, and a hollow rotation shaft 22 is provided on the other side surface thereof so as to be coaxial with the solid rotation shaft 21. . A holding member 41 is axially supported by bearings 42 and 43 on the shafts 21 and 22, respectively. A light emitting portion 44 such as a xenon tube is provided in the holding member 41, and the lead wire connected to the light emitting portion 44 is a hollow rotating shaft.
It is connected to a circuit provided in the camera body 1 through an axis 30 of 22.

4 and 5 are sectional views taken along the line II-II of FIG. Using FIG. 3, FIG. 4 and FIG.
A method of holding and fixing the storage position A to the storage position A and a method of rotating the storage position A to the use position will be described. Here, FIGS. 3 and 4 show a state in which the flash body 40 is held and fixed at the storage position A,
FIG. 5 shows a state in which the slide knob 5 is operated to the rear of the camera and the flash body is rotated to the use positions B ₁ and B ₂ .

In these drawings, a slide type knob 5 is provided on the upper wall 28 of the upper cover 20, and is connected to a lever 7 arranged on the inner surface of the upper wall 28 via a pin 6. In FIG. 3, both ends 71, 72 of the lever 7 are provided with claws 8a, 8b projecting forward of the top cover 20, respectively. Nails 8a, 8b
Is constantly urged forward of the camera by a torsion spring 9 provided on a pin 29 provided upright from the top cover 20. Since the holding member 41 is provided with engaging holes 413 and 414 facing the claws 8a and 8b, respectively, when the holding member 41 is at the storage position A, the two claws 8a and 8b are engaged with the engaging holes 413 and 413. Insert and engage with 414.
On the other hand, a torsion spring 46 is externally attached to the solid rotating shaft 21 and the bearing 42. Further, one end 461 of the torsion spring 46 is connected to the holding member 4
It is locked to a spring hooking pin 411 protruding from 1, and the other end 462
Is a spring hook ring 24 screwed to the rotary shaft 21 by a screw 23.
Are hung on. As a result, the holding member 41 is urged by the torsion spring 46 toward the use position (downward perpendicular to the plane of FIG. 3). The turning force of the holding member 41 by the torsion spring 46 is locked by fitting the claws 8a, 8b and the engaging holes 413, 414. That is, the flash body 40 is fixed at the storage position A.

Next, as shown in FIG. 5, when the slide type knob 5 is operated toward the rear of the camera against the torsion spring 9, the claws 8a and 8b retract from the engaging holes 413 and 414, and the force of the torsion spring 46 is applied. The holding member 41 rotates toward the use position. That is, the flash body 40 rotates toward the use position.

Next, a state in which the flash body 40 is held and fixed at the use positions B ₁ and B ₂ will be described with reference to FIGS. 3, 6, 7, and 8. Here, FIGS. 3 and 6 show the main body of the flash device.
40 is in the state of being fixed in the storage position A, FIG. 7 is a state in which the flash body 40 has been rotated to the use position B ₁ , and FIG. 8 is the state in which the flash body 40 has been rotated to the use position B ₂ . It has been moved.

In FIG. 3, a hole 25 is formed in the peripheral surface of the rotary shaft 21,
A spring 26 and a ball 27 are inserted in the hole 25, and the ball 27 is biased outward. On the other hand, on the inner peripheral surface of the bearing 42, the cam surface 421 and the cam groove 422 shown in FIG. 6, FIG. 7 and FIG.
And 423 are engraved respectively. At the retracted position A, the ball 27 is in contact with the cam surface 421 as shown in FIG.

When the slide type knob 5 shown in FIG. 3 is operated to the rear of the camera in the storage position A shown in FIG. 6,
The holding member 41 is rotated by the force of the torsion spring 46, and the ball 27
Engage with the cam groove 422, and as shown in FIG.
Is first held and fixed in the use position B ₁ .

Then, the user rotates the holding member 41 to change the use position B ₁
When the holding force is released by rotating the holding member 41 in the direction biased by the torsion spring 46, the ball 27
Engages with the cam groove 423, and as shown in FIG.
1 is held and fixed at the use position B ₂ .

When the holding member 41 in the use position B ₁ or B ₂ is manually rotated toward the storage position A, the side wall 415 of the holding member 41 surrounding the light emitting portion 44 shown in FIG. 2
Storage position A while pressing the claws 8a, 8b protruding from 0
To the claws 8a, 8b by the torsion spring 9 at the storage position A.
Is inserted into and engaged with the engagement holes 413 and 414, and the holding member 41 is held and fixed. That is, the flash body 40 is held and fixed in the storage position A.

Next, a detection switch that detects the position of the holding member 41 and a changeover switch that switches depending on the position of the holding member 41 will be described with reference to FIGS. 6, 7, 9, and 10.

In FIGS. 6 and 7, reference numerals 2 and 3 denote spring-type switch contact pieces fixed to the top cover 20. A detection pin 4 is provided at the tip of the switch contact piece 3, and the head of the detection pin 4 can be projected from the top cover 20 by the elasticity of the switch contact piece 3.

On the other hand, FIG. 9 and FIG. 10 are IV cross sections of FIG. In FIGS. 9 and 10, reference numerals 11, 12, and 13 denote spring-type switch contact pieces fixedly mounted on the top cover 20. A detection pin 14 is provided at the tip of the switch contact piece 13, and the head of the detection pin 14 can be projected from the top cover 20 by the elasticity of the switch contact piece 13.

Then, when the holding member 41 is in the storage position A, as shown in FIGS. 6 and 9, the detection pins 4 and 14 are
Are retracted from the top cover 20 and switch contact pieces 2
And 3 are spaced apart, switch contacts 12 and 13 are also spaced apart, and switch contacts 11 and 13 are in contact.

Next, when the holding member 41 is held in the use position B ₁ or B ₂ , as shown in FIGS. 7 and 10, the detection pins 4 and 14 project from the upper surface cover 20 and are connected to the switch contact piece 2. 3 is in contact, switch contacts 12 and 13 are also in contact, and switch contacts 11 and 13 are spaced apart.

As described above, the detection switch composed of the switch contact pieces 2 and 3 detects the position of the holding member 41, that is, whether the flash body 40 is in the storage position A or the use position B ₁ or B _2. . Further, the position of the holding member 41, that is, when the flash body 40 is in the storage position A and the use position B ₁ or B ₂ is changed by the changeover switch composed of the switch contact pieces 11, 12 and 13. You can switch.

FIG. 11 is a circuit diagram of the present invention using the detection switch and the changeover switch described above. 101 is a holding member 4
1 is a switch interlocking with the position, SW1 is a detection switch composed of the switch contact pieces 2 and 3 of FIG. 6,
SW2 is a changeover switch composed of the switch contact pieces 11, 12 and 13 of FIG. One end of the detection switch SW1 is grounded, the other end is connected to the power supply V _CC (high level) via the resistor 102, and this terminal is input to the arithmetic circuit 103.

Middle indirect piece of changeover switch SW2 (switch contact piece 1 in Fig. 9
3) is connected to the X contact switch SW3, and contacts the switch contact piece 13 when the flash body 40 is in the storage position A. The switch contact piece 11 is the shoe contact point 104 provided inside the accessory shoe 10. The switch contact piece 11 that is connected to the contact point 104a and contacts the middle indirect piece (switch contact piece 13) when the flash body 40 is in the use position B ₁ or B ₂ is connected to the built-in flash light emitting circuit 105.

Here, the X-contact switch SW3 is a switch that interlocks with a shutter (not shown), one end of which is connected to the central indirect piece of the switch SW2, and the other end of which is grounded.

In the case of a focal plane shutter, the X contact switch SW2 is adapted to be closed when the traveling of the shutter front curtain is completed. Further, the built-in flash unit light emitting circuit 103 is adapted to cause the light emitting unit 44 shown in FIG. 3 to emit light when the X contact switch SW3 is closed when the flash unit 40 is in the use position B ₁ or B ₂ . Further, the built-in flashlight emission circuit 103 outputs a charge completion signal 201 to the arithmetic circuit 103 when charging for emission is completed, and stops emission when the emission stop signal 202 is input from the arithmetic circuit 103.

A film sensitivity setting unit 106 outputs the film sensitivity set by the film sensitivity signal 203 to the arithmetic circuit 103.

Reference numeral 107 denotes a light receiving means, and a light receiving integrated value i, which is a value obtained by time-integrating the light receiving value, is used as a light receiving integrated value signal 204 in the arithmetic circuit 103.
Output to. Here, in the case of a single-lens reflex camera, the light receiving means 107 is arranged so as to receive the light reflected by the film surface after passing through the taking lens when the mirror is in the up state, and the light receiving means 107 is arranged when the mirror is not up. It is designed not to receive light.

SW4 is a release switch that is closed by pressing a release button (not shown). Here, one end of the release switch SW4 is grounded, the other end is pulled up to the power supply V _CC (high level) via the resistor 108, and
It is input to one end of the NOR gate 109. Also, Noah Gate 1
The other end of 09 receives the release-disabled signal 205 input from the arithmetic circuit 103.

Here, the release-disabled signal 205 has a high level when release is impossible and has a low level when release is possible.

The output of the NOR gate 109 is input to the base terminal of the transistor 111 as the release signal 206 via the arithmetic circuit 103 and the resistor 110. Here, the release signal 206 has a high level when the release button is pressed when the release is possible, and has a low level otherwise.

The transistor 111 has a grounded emitter and has a release means 112 as a collector load. The release means 112 operates by being supplied with the power supply V _CC when the transistor 111 is turned on. Here, the release means 112 is composed of a magnet, a motor or the like for starting the camera, and does not operate when the transistor 111 is off because the power supply V _CC is not supplied.

When the release-disabled signal 205 is at a high level,
The release signal 207, which is the output of the NOR gate 109, becomes low level regardless of the output of the release switch SW4, which is the other input of the NOR gate 109. That is, since the release signal 206 is at a low level regardless of whether or not the release button is pressed, the transistor 111 is off and the release means 1
12 does not work and the camera does not start. In other words, it becomes a release lock.

When the release-disabled signal 205 is at a low level, the output of the release switch SW4 is at a high level, that is, unless the release button is pressed, the release signal 206, which is the output of the NOR gate 109, is at a low level, the transistor 111 is off, and the release means is released. 112 does not work and the camera does not start. Release switch SW4 when release-disabled signal 205 is at low level
Output is low level, that is, when the release button is pressed, the release signal 206 which is the output of the NOR gate 109 becomes high level, the transistor 111 is turned on, the release means 112 is activated, and the camera is activated.

Next, a light emitting diode 115 is displayed in the viewfinder, and emits light when charging for the built-in flash device is completed, or when charging of an external flash device is completed. The light emitting diode 115 has an anode terminal connected to the power supply V _CC via the resistor 116 and a cathode terminal connected to the collector terminal of the transistor 111. The transistor 111 has a grounded emitter, and inputs the charging completion display signal 207 output from the arithmetic circuit 103 from the base terminal via the resistor 113. Here, the charge completion display signal 207 is at a high level when the built-in flash unit is fully charged or when the external flash unit is completely charged, and is kept at a low level in other cases.

When the external flash is attached to the accessory shoe 10 shown in FIG. 1, the shoe contacts 104 are adapted to connect with the corresponding contacts of the external flash.
The shoe contact 104b transmits the light emission stop signal 208 output from the arithmetic circuit 103 to an external flash unit.

The shoe contact 104c transmits the charge completion signal 209 output from the external flash device to the arithmetic circuit 103.

The shoe contact 104d is a TT output from an external flash device.
A flash unit identification signal 210 indicating whether or not it is an L dimming flash unit is transmitted to the arithmetic circuit 103. The shoe contact 104e is grounded.

The arithmetic circuit 103 is composed of a microcomputer and will be described with reference to the flowchart of FIG.

First, the program starts when the power of the camera is turned on or when shooting is completed.

In step S1, the film sensitivity set by the film sensitivity setting means 106 is input as the film sensitivity signal 203.

Next, in the film S2, from the input film sensitivity, a proper received light integrated value I is calculated as a value that becomes appropriate when the total amount of received light, that is, the amount of received light, which is a proper exposure when the flashlight is emitted is time-integrated. To do.

In step S3, the output of the detection switch SW1 is input to determine whether the built-in flash unit is in the use position B ₁ or B ₂ or the storage position A. That is, when the output of the detection switch SW1 is at the low level, the built-in flash is in the use position B ₁ or B ₂ , and when the output of the detection switch SW1 is at the high level, the built-in flash is in the storage position A.

When the built-in flash is in the use position A, the process proceeds to step S4. Built-in flashlight emission circuit 10 in step S4
The charge completion signal 201 output from 5 is input to determine whether the charge is completed. If it is determined that the charging is completed, the process proceeds to step S5.

In step S5, the release disable signal 205 is reset to low level.

Next, in step S6, the charging completion display signal 207 is output to the base terminal of the transistor 114 via the resistor 113.

In step S7, the release signal 206 output from the NOR gate 109 is input, and the release means 112 operates to determine whether or not the camera has been activated and released.

 If it is determined that the release has been performed, the process proceeds to step S8.

In step S8, the received light integrated value signal 207 output from the light receiving means 107 is input and set as the received light integrated value i.

Then, in step S9, the received light integrated value i is compared with the appropriate received light integrated value I.

If it is determined that the received light integrated value i is smaller than the proper received light integrated value I, the process returns to step 8. When the received light integrated value i is smaller than the appropriate received light integrated value I, step S8 and step
Repeat the S9 loop. When it is determined that the received light integrated value i is equal to or larger than the proper received light integrated value I, the process proceeds to step S10.

In step S10, the light emission stop signal 202 is output to the built-in flash device light emitting circuit 105, and the flow is ended.

If it is determined in step S7 that the release is not desired, the process returns to step S1 and the flow is repeated.

If it is determined in step S4 that charging is not completed, the process jumps to step S11.

In step S11, the release disable signal 205 is set to high level and output to the NOR gate 109. Then, the process returns to step S1 and the flow is repeated.

In step S3, if the output of the detection switch SW1 is input and it is determined that the storage position A is present, the process jumps to step S12.

In step S12, the release-disabled signal 205 and the charge completion display signal 207 are reset to low level.

Next, in step S13, the flash device identification signal 210 is input from the shoe contact 104d to determine whether the external flash device is a TTL dimming flash device. When it is determined that the flash is a TTL light control flash, the process proceeds to step S14.

In step S14, charge completion signal 209 from shoe contact 104c
Is input to determine whether or not the external flash unit is fully charged.

When it is determined that the charging is completed, step S15
Go to.

In step S15, the charging completion display signal 207 is set to a high level and output to the base terminal of the transistor 114 via the resistor 113.

Next, in step S16, the release signal 206 output from the NOR gate 109 is input to determine whether or not the release has been performed. When the shutter is released, the process proceeds to step S17.

In step S17, the received light integrated value signal 204 output from the light receiving means 107 is input and set as the received light integrated value i.

Next, in step S18, the received light integrated value i and the appropriate received light integrated value I are compared. The received light integrated value i is a proper received light integrated value I
If it is determined to be smaller, the process returns to step 17. When the received light integrated value i is smaller than the appropriate received light integrated value I, the loop of steps S17 and S18 is repeated.

When the received light integrated value i is equal to or larger than the proper received light integrated value I, the process proceeds to step S19.

In step S19, the light emission stop signal 208 is sent to the shoe contact 104b.
Output to an external flash device via.

 Then, the flow ends.

If it is determined in step S16 that the release has not been made, the process jumps to step S20.

In step S20, the output of the detection switch SW1 is input to determine whether the built-in flash is in the use position B ₁ or B ₂ or the storage position A.
To determine if. When it is determined that the built-in flash is in the use position B ₁ or B ₂ , the flow returns to step S1 and the flow is repeated. When it is determined that the built-in flash is in the storage position A, the flow returns to step S13 and repeats.

If it is determined in step S14 that charging has not been completed, the flow returns to step S1 and the flow is repeated.

If it is determined in step S13 that the external flash unit is not the TTL dimming flash unit, the process jumps to step S21.

In step S21, charge completion signal 209 from shoe contact 104c
Is input to determine whether or not the external flash unit is fully charged.

When it is determined that the charging is completed, the process proceeds to step S22. In step S22, the charging completion display signal 207 is set to the resistance 11
It outputs to the base terminal of the transistor 111 via 3. Next, in step S23, the release signal 206 output from the NOR gate 109 is input, and it is determined whether or not the release means 112 is activated to activate the camera and release is performed. Then, when it is determined that the release has been performed, the flow ends. Step S2
If it is determined that the release has not been made in step 3, the process jumps to step S24.

In step S24, the output of the detection switch SW1 is input to determine whether the built-in flash is in the use position B ₁ or B ₂ or the storage position A.
To determine if. When it is determined that the storage position A is present, the process returns to step S13 to repeat the flow, and the use position B
_If it is determined to be ₁ or B ₂ , the process returns to step S1 and the flow is repeated.

If it is determined in step S21 that charging has not been completed, the process returns to step S1 and the flow is repeated.

In the flowchart shown in Fig. 12, the position of the built-in flash unit is confirmed until it is released. Therefore, change the built-in flash unit from the storage position to the use position or from the use position to the storage position on the way. But there is no problem.

Next, the operation of the present invention will be described mainly with reference to FIG.

[I] When the built-in flash unit is set to the use position B ₁ or B ₂ At this time, the detection switch SW1 is closed and the changeover switch SW2
Is connected to the built-in flashlight emission circuit 105. Then, the low level output of the detection switch SW1 is input to the arithmetic circuit 103, and it is determined that the built-in flashlight is in the use position B ₁ or B ₂ .

Here, if the built-in flashlight emission circuit 105 does not output the charge completion signal 201 to the arithmetic circuit 103, the release-disabled signal 205 (high level) is output from the arithmetic circuit 103. Since the release-disabled signal 205 is input to the NOR gate 109, the release signal 206, which is the output of the NOR gate 109, has a low level regardless of the output of the release switch SW4, that is, whether or not the release button is pressed. Therefore, the transistor 111 is in the off state, the release means 112 does not operate, and the camera does not start. That is, the release lock state is set. At this time, since the camera does not start and the shutter does not operate, the X contact switch SW3 is not closed and the built-in flash light emitting circuit 105 does not emit light.

When the built-in flashlight emission circuit 105 has completed charging, it outputs a charging completion signal 201 to the arithmetic circuit 103. Then, the arithmetic circuit 103 outputs the charging completion display signal 207 at a high level and outputs the transistor 114 so that the transistor 114 is turned on.
15 lights up and the viewfinder shows that charging is complete. When the charging is completed, the release-disabled signal 205 is reset to the low level. Then, when the release button SW is pressed to close the release switch SW4, the two inputs of the NOR gate 109 are at the low level, so the release signal 20 which is the output thereof.
6 is a high level. Therefore, the transistor 111 is turned on, the release means 112 is activated, and the camera is activated. When the camera is started and the front curtain of the shutter is completed running, the X contact switch SW4 is closed and connected to the built-in flash light emitting circuit 105, so that the built-in flash light emitting circuit 105 causes the light emitting portion to emit light. Then, the arithmetic circuit 103 compares the received light integrated value i, which is the received light integrated value signal 204 output from the light receiving means 107, with the proper received light integrated value I which is calculated in advance as the received light integrated value for proper exposure based on the film sensitivity, and compares i When ≧ I, the light emission stop signal 202 is output to the built-in flash device light emitting circuit 105 to stop the light emission.

The shooting may end with i <I here, but in that case, a large emission capacity is required because the subject is far and the aperture size is small, but when the emission capacity of the built-in flash is smaller than that. Is.

[II] When the built-in flash is set to the storage position A (a) When the external flash is a TTL dimming flash.

At this time, the detection switch SW1 opens and the changeover switch SW2
Are connected to shoe contacts 104a. And the arithmetic circuit 103
The high level output of the detection switch SW1 is input to, and it is determined that the built-in flash unit is in the storage position A.

Here, when the external flash device is fully charged, the charging completion signal 209 is input from the external flash device to the arithmetic circuit 103 via the shoe contact 104c, and the arithmetic circuit 103 outputs the charging completion display signal 207 to emit light. The diode 115 lights up.

When the built-in flash is in the storage position A, the release-disabled signal 205 is reset, that is, the release-disabled signal 205 is kept at a low level, so the output of the NOR gate 109 reflects the output of the release switch SW4. Will be done. The release signal 206 which is the output of the NOR gate 109 becomes high level when the output of the release switch SW4 is low level, that is, when the release button is pressed. Then, the transistor 111 is turned on, the release means 112 is activated, and the camera is activated. Then, when the camera is activated and the front curtain of the shutter is completed, the X contact switch
Since SW3 is closed and connected to the external flash device via the shoe contact 104a, the external flash device emits light.

Then, the arithmetic circuit 103 compares the received light integrated value i, which is the received light integrated value signal 204 output from the light receiving means 107, with the appropriate received light integrated value I which is calculated in advance as the received light integrated value for proper exposure based on the film sensitivity. When i ≧ I, the light emission stop signal 208 is output to the external flash unit through the shoe contact 104b to stop the light emission.

(B) If the external flash is not a TTL dimming flash, or if the external flash cannot be installed.

At this time, the detection switch SW1 opens and the changeover switch SW2
Are connected to shoe contacts 104a. And the arithmetic circuit 10
The high level output of the detection switch SW1 is input to 3 and it is determined that the built-in flash unit is in the storage position A.

Here, when the external flash unit is attached and charging is completed, the charging completion signal 209 is input from the external flash unit to the arithmetic circuit 103 via the shoe contact 104c, and the charging completion display signal 207 is output from the arithmetic circuit 103. It is output and the light emitting diode 115 lights up.

When the built-in flash is in the storage position A, the release-disabled signal 205 is reset, that is, the release-disabled signal 205 is kept at a low level, so the output of the NOR gate 109 is the output of the release switch SW4. To reflect. The release signal 206 output from the NOR gate 109 becomes high level when the output of the release switch SW4 is low level, that is, when the release button is pressed. Then, the transistor 111 is turned on, and the release means 1
12 is activated and the camera is activated. Then, when the camera is activated and the shutter front curtain has completed running, the X contact switch SW3 is closed, and if an external flash is attached, it is connected to the external flash via the shoe contact 104a, and the external flash is attached. Emits light. Since the external flash unit is not a TTL dimming flash unit, the light emission amount is determined by the external flash unit.

〔The invention's effect〕

As described above, according to the present invention, when the second flash device is mounted in addition to the first flash device built in the camera, and the first flash device is in the use position, the second flash device is used. Since the second flash device does not inadvertently emit light and does not result in improper exposure,
Since it is sufficient to confirm the position of the first flash device itself to determine whether the first flash device or the second flash device can be used, the user can intuitively check the other switches and displays without checking. It is possible to determine which flash device can be used.

Further, according to the second invention, since the display of the built-in flash device and the display of the flash device mounted outside is a single display, it is possible to save the space for mounting the display and the cost of the display. In addition to the above effects.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera with a built-in flash device, FIG. 2 is a side view when an external flash device is attached to the camera with a built-in flash device, and FIG. 3 is a sectional view taken along the line I-I of FIG. 4 is a sectional view taken along the line II-II of FIG. 3 in which the internal flash is in the retracted position, and FIG. 5 is a sectional view taken along the line II-II of FIG. 3 in which the internal flash is in the used position.
FIGS. 7 and 8 are sectional views taken along the line III-III in FIG. 3, FIGS. 9 and 10 are sectional views taken along the line IV-IV in FIG. 3, and FIG. 11 is a circuit diagram of the present invention. FIG. 12 shows a flowchart. [Explanation of symbols of main parts] SW1 …… Detection switch, SW2 …… Changeover switch, 104 ……
Accessory shoe, 103 ... Arithmetic circuit

Claims (2)

(57) [Claims] 1. A flash that has a built-in first flash means that is movable between a use position and a storage position, and that can be externally equipped with a second flash means other than the first flash means. In the camera with a built-in device, a determination unit that determines whether the first flash unit is in a use position or a storage position; and if the determination unit determines that the first flash unit is in a use position A flash device built-in camera, comprising: a light emission prohibiting unit that prohibits light emission of the second flashing unit. 2. A flashlight in which a first flash means movable between a use position and a storage position is built in, and a second flash means different from the first flash means can be mounted on the outside. In the camera with a built-in device, a determination unit that determines whether the first flash unit is in a use position or a storage position; and if the determination unit detects that the first flash unit is in a use position. , A light emission prohibiting means for prohibiting light emission of the second flashing means, and displaying the charge state of the first flashing means when the determining means determines that the first flashing means is in a use position, A camera with a built-in flash device, comprising: a single display means for displaying the charge state of the second flash means when it is determined that the first flash means is in the storage position.