JPS59219729A - Flash auto mechanism of camera - Google Patents

Abstract

PURPOSE:To expose properly at the time of close-up photographing by automatically switching a flash auto mehanism which is used at the time of normal flash photographing to close-up photographing in interlocking with the photographing mode when it is switched to the close-up mode. CONSTITUTION:The sliding operation of the frame body 41 of a flash device to the close-up photographing is executed in such a way that a close-up, lever 28 is moved leftward and a flash auto (FA) lever 21 is turned clockwise simultaneously to the movement of the close-up lever 28. When the FA lever 21 is turned, a cam section 21d contacting with the blade driving pin 3 of a rotor 1 is moved so as to control shutter blades 4 and 5 in such a way that the aperture goes to narrower than the case of flash photographing mode. Therefore, when a release button is depressed while the camera is directed to an object at a short distance, the shutter blades 4 and 5 are opened, but the aperture is made narrower by the quantity of the FA lever 21 turned clockwise. Therefore, the proper exposure is obtained at the time of close-up flash photographing.

Description

[Detailed description of the invention] The present invention relates to a camera flash auto mechanism.

BACKGROUND ART Conventionally, a method is known for close-up photography using a flash device, which narrows down the aperture to a large extent, deepens the depth of field of the lens, and achieves clear focus even at short distances.

However, when photographing a subject at a close distance, it is necessary to change the aperture value significantly according to changes in the subject distance, and unlike the conventional method, the photographing lens does not have to be extended to the subject distance. This is difficult to achieve with the conventional Francheaut mechanism, which is linked to the amount of lens extension and film sensitivity. To provide an easy-to-use camera francheaut mechanism that can optimize exposure during photographing and at the same time prevent malfunctions such as battery consumption caused by forgetting to switch a flash device.

Embodiments of the present invention will be described below based on the drawings.

1 and 2 are perspective views showing the appearance of an embodiment of the camera according to the present invention, and FIG. 1 shows the second embodiment in the normal shooting mode.
The figure shows the camera in the close-up photography mode, and FIG. 3 is an exploded perspective view showing the arrangement of its internal mechanisms, showing the state in the normal photography mode.

In FIG. 3, reference numeral 1 denotes a rotor, which is rotatably supported by a central hole 1a in a bin provided on the shutter base plate (not shown).
The spring 2 hooked to the hole 1b urges the spring 2 to rotate in the counterclockwise direction, and the third
It is stuck in the state shown in the figure. The rotor 1 further includes the -
A spiral conductive pattern 1C is formed on one side surface, and a braking portion 1d that comes into contact with the vertically bent portion 6b of the set plate 6 and a vertically bent portion 1 of the distance control lever 16 (to be described later) are formed around the other side.
AP (autofocus) claws 1e and i for stopping the operation of the distance control lever 16 by coming into contact with 6f';
f, 1g are fully formed, and the blade drive bin 3 is integrally caulked to the front surface thereof.

Then, in the state shown in FIG. 3, the conductive pattern 1C of the rotor 1
When the rotor 1 is energized by an electric circuit (not shown), the rotor 1 rotates clockwise against the biasing force of the spring 2 according to Fleming's left hand rule. The yoke is placed.

The blade drive pin 3 is fitted into cam grooves 4b and 5b of the shunter blades 4 and 5, and collides with a cam surface 21d of an FA lever 21, which will be described later, during flash photography.

The shunter blades 4 and 5 are rotatably supported by holes 4a and 5a, respectively, in pins provided on the shaft base plate, and when the rotor 1 rotates, the blade drive pin 3
The opening/closing operation of the blades is performed by this.

The set plate 6 is held slidably in the horizontal direction in the figure by fitting the pair of long grooves 5a, 5a with a pin 7.7 protruding from the shutter base plate, and is held by a spring 8 hung on the protrusion 6C. The spring 8 is biased to the left by a winding charging mechanism (not shown), and is slid to the right against the force of the spring 8, and is locked at the charging position (not shown) by a locking member (not shown). It has become. Further, as described above, the vertical bent portion 6b of the set plate 6 comes into contact with the braking portion 1d of the rotor 1, and when the rotor is energized, the set plate 6 serves to restrict the movement of the rotor 1. It meshes with a governor mechanism (not shown) to ensure uniformity of movement, and its vertically bent portion 6e is connected to a lens barrel connecting lever 15 (described later).
The plate 6 is designed to come into contact with the arm 15c of the camera, and further holds a contact piece (not shown) integrally and is set on the IC that controls the sequence of the camera using a circuit pattern (not shown).
The driving position of the vehicle is being input.

Reference numeral 9 denotes a distance ring, whose inner diameter part 9a is rotatably fitted to a lens barrel base plate (not shown), and its outer peripheral surface has a charging protrusion 9b, a claw part 9c, a hook part 9d, and a gear part 9.
et, and is biased to rotate clockwise during the system by a spring 10 hung on the hook portion 9d, but a charging mechanism (not shown) resists the force of the spring 10 via the charging protrusion 9b. When the claw portion 9 is rotated counterclockwise, the claw portion 9
The claw portion 12b of the stop claw 12, which will be described later in C, is engaged and locked in the charging position, and the gear portion 9
e meshes with a gear part '14b of a stop wheel 14, which will be described later, and has three feeding cam parts 9f on the rear surface at equal intervals on the circumference. Three protrusions 11a provided on a part of the lens 11 are pushed and pushed by springs (not shown), so that the photographic lens is extended according to the amount of rotation of the distance ring 90.

The stop claw 12 is rotatably supported by the lens barrel base plate through a hole 12a, and is biased to rotate counterclockwise in the figure by a spring 13 hooked to the hook portion 12d. 1. As mentioned above, there is a drive pin 12ct outside the claw part 12b that locks the distance ring 9, and the drive pin 12 is stopped at the position shown in FIG.
When the center stopper 6 moves to a position to the left of the charge position shown in FIG. 3, it comes into contact with the left end of the set plate 6, and the stop claw 12b rotates clockwise, causing the stop claw 12b to rotate clockwise.
The distance ring 9 is disengaged from the claw portion 9C.

The stop wheel 14 is rotatably supported by a shaft 14a on a structural part (not shown) of the camera, and its gear part 14b
is the gear portion 9e of the distance ring 9 as described above.

The rotational movement of the distance ring 9 is caused by the stop wheel 14
, and long-distance claw 14C2 middle-distance claw 14
d and a short-distance pawl 14e are integrally provided, and a vertically bent portion 16g of a distance control lever 16, which will be described later, comes into contact with these pawls when the stop wheel 14 rotates.

The lens barrel connecting lever 15 is rotatably supported by the structural member through a hole 15a, and a vertically bent portion 15b at one end abuts a notch 16d of a distance control lever 16, which will be described later, and an arm portion 15C at the other end. is adapted to abut against the vertically bent portion 6e of the set plate 6 as described above.

The distance control lever 16 has a long groove 16a fitted with a shaft 50a protruding from the structural member, and a movable leno (-20) bin 20C to be described later. It is supported so as to be slidable and swingable, and is biased toward the right in the figure by a spring 17 hung on the hook portion 16e, and in the state shown in FIG.
b comes into contact with the shaft 50b to position the distance control lever 16, and the upper side 16c of the lever 16 is separated from the bin 20C. As described above, the distance control lever 16 has a cutout portion 16d and vertical bent portions 16f, 16f.
' and 16g, respectively.

Reference numeral 18 denotes a proximity reset lever, which is rotatably supported on the structural member through a hole 18a, and is rotated counterclockwise in the figure by a strong spring 19 applied to a hole 18e provided in one arm 18b. The arm portion 18b is urged to come into contact with a vertically bent portion 33c at the lower end of the reset lever 33 (described later), and in the state shown in FIG. The city is running into section 36C.

Further, the proximity reset lever 18 has an arm 18c that is separated from the end 6f of the set plate 6 by a small distance when the set plate 6 is charged as shown in FIG. It has a vertically bent portion 18d' that is in contact with it.

The movable lever 20 is rotatably supported by the structural member through the hole 20a, one end of the arm 20b is in contact with the proximity reset lever 18 as described above, and the other end is crimped with the bin 20C. The upper side 16c of the distance control lever 16 comes into contact with the bottle 20c during the distance adjustment operation, thereby stopping the distance ring 9 from rotating and controlling the amount by which the photographic lens is extended.

Reference numeral 21 denotes an FA (flash auto) lever, which is rotatably supported by the structural member through a hole 21a, and has an arm portion 2 that comes into contact with an upright bent portion 31c of a flash device detection lever 31, which will be described later.
1b, a cam groove 21C into which a pin 22c of a distance signal lever 22 (to be described later) fits, and a cam portion 21d that regulates the position of the drive pin 3 of the rotor 1 that drives the rotor blades 4 and 5.

However, in the state shown in FIG. 3, the cam portion 2
1d and the drive bin 3 are in a state of non-contact.

The distance signal lever 22 is connected to the hole 2 of the ISO switching lever 24.
The shaft 22a at one end is fitted into the shaft 22a at one end, and is urged to rotate counterclockwise in the figure by the spring 23 applied to the hole 22b, and the pin 22C at the other end is fitted into the cam groove of the Ii'' A lever 21 as described above. 21c, the bent vertically bent portion 22d contacts the vertically bent portion 16f of the distance control lever 16 and transmits the amount of displacement of the distance control lever 16 to the distance signal lever 22. , when the camera is not in flash photography mode, it is moved to a position where it does not come into contact with the distance control lever 16.

The ISO switching lever 24 is a close-up lever 28 which will be described later.
It is rotatably supported around a hole 24a' that fits into the shaft 28b of the lever, and has a hole 24b at one end into which the shaft 22a of the distance signal lever 22 fits, as described in MiJ, and at the other end. The arm 24C1 fitted into the recess 25d of the ISO switching knob 25? , respectively.

The ISO switching knob 25 includes an operation knob 25a protruding from the top surface of the camera body, an ND filter 25b for reducing the amount of light incident on the light receiving element 26 in conjunction with the ISO switching operation, and a click spring 21. A plurality of click grooves 25C for positioning and the recess 2 on the lower surface thereof.
5d, and is supported by known means so as to be slidable in the left and right directions in the figure, so that in the state of I80400, the filter part 25b is located in front of the light receiving element 26. .

The close-up lever 28 is supported slidably in the horizontal direction in the figure by fitting a shaft 29 provided in a part of the structural member into a pair of long grooves 28a, and has an ISO sensor at one end as described above.
a shaft 28b that fits into the hole 24a of the switching lever 24;
It has a stepped portion 28c that is in contact with an upright bent portion 36d of a flash device holding plate 36, which will be described later, and is biased to slide rightward in the figure by a spring 30 applied to a protruding portion 28d at the other end.

The flash device detection lever 31 is L-shaped and has a hole 31.
The spring hook is rotatably supported on the structural member by a hole 31b, and the spring hook is biased to rotate counterclockwise in the figure by a spring 32 hooked to a hole 31b. The edge i'fl131d and the lower cam edges 31e and 31f are formed so as to come into contact with a protrusion 41b on the lower surface of the flash device frame 41, which will be described later. As described above, the arm portion 21b of the fi'' A reno (-21) is in contact with the arm 21b of the fi'' A reno (-21).

The reset lever 33 is supported by a shaft 34 provided on a part of the structural member that is fitted into a pair of long grooves 33a so that the reset lever 33 can slide vertically in the figure.
The vertical bent portion 33c provided at the lower end is biased to slide downward by a weak spring 35 applied to b.
As mentioned above, the arm portion 18b of the proximity reset lever 18
contacts and is pushed upward by the counterclockwise rotating force of the spring 19 of the proximity reset lever 18.

Further, on the upper part of the reset lever 33, there is a distal end 33d pressed against the protruding part 36c of the flash device holding plate 36 in the state shown in FIG. It has a display section 33e that protrudes from the top to inform the photographer that it is in the close-up operation mode, and at the same time allows the close-up pot mode to be canceled by pressing this protruding section.

The flash device holding plate 36 is pivotally supported by the structural member mJ through a hole 36a, and can be rotated between stoppers 38 and 39, and the spring hook is rotated counterclockwise in the figure by a strong spring 37 applied to the part 36b. is biased to rotate in the direction. Further, the above-mentioned protrusion 36c on the flash device holding plate 36 comes into contact with the stopper 38.39 to limit its rotation, and the vertically bent portion 36d provided on the protrusion 36c is connected to the close-up lever 28. The close-up lever 28 is moved to the left in the figure in conjunction with the movement of a flash device frame 41, which will be described later, in the close-up photography mode, and is held there. A pair of shafts 36e protruding from the flash device frame 41 are fitted into guide grooves 41a, and a cam portion 44e on the lower surface of the finder block 44, which will be described later, is fitted into the guide groove 41a of the flash device frame 41.
, 44f and a protrusion 3 for interlocking the finder block 44 with the movement of the flash device holding plate 36.
6f and a flick spring 40.

The flash device frame 41 has a built-in reflector for the arc tube 2 (not shown), and as described above, the pair of shafts 36e of the flash device holding plate 36 are fitted into the guide grooves 41a, so that the flash device frame 41 is moved horizontally in the figure. The cam edge 31d of the flash device detection lever 31 is slidably held, and a protrusion 41b protruding from the lower surface thereof as described in v11.

31e and 31f to displace the flash device detection lever 31 according to the position of the flash device holding plate 41, and click spring 40 of the flash device holding plate 36.
click grooves 41e and 41df that engage with the click grooves 41e and 41df;
Similarly, the stepped portion 41G on one side can come into contact with the protrusion 36f.

Reference numeral 42 denotes a contact piece fixed to the lower surface of the flash device frame 41 with a hole 42a, an e-screw, etc., and the contact piece 42b is attached to the pattern 43a of the circuit board 43 as the flash device frame 41 moves.
43b, and informs an IC (not shown) of the camera of the camera's shooting mode. Further, the flash device frame 41 has a photoelectric contact piece (not shown), and a pattern 43a formed by the contact piece part 42.

The light emitting capacitor of the flash device is configured to start charging in synchronization with the on-off timing of the flash device 43b.

The finder block 44 is rotatably held on the structural member by a pair of shafts 44a, and a spring hook is attached to a portion 44b.
It is biased to rotate counterclockwise in the figure by a spring 45 applied to it, and an autofocus light-receiving window 44c and a finder window 44d are arranged side by side on its front surface, and cam parts 44e and 44f are provided on its lower surface. As described above, the cam portion 44e comes into contact with the protrusion 36f of the flash device holding plate 36, and in the normal shooting mode shown in FIG.
is in contact with.

Next, the operation of this embodiment having the above configuration will be explained.

First, to explain the normal shooting mode, the set plate 6 slides to the right against the force of the spring 8 by the unillustrated winding charge mechanism, and the locking part (not shown) is disengaged, as shown in FIG. At the same time, the distance ring 9 is rotated counterclockwise against the force of the spring 10, and its claw portion 9C engages with the claw portion 12b of the stop claw 12, and the charging position is stopped. Locked in position. FIG. 4 is a front view showing the main parts of the focus adjusting section including the distance ring 9 in the charged state.

Therefore, when you hold the camera facing the subject and press the release button (not shown) with the first stroke, the distance to the subject is stored in the camera's iC by a known distance measuring means, and then the release button is pressed with the first stroke. When pushed to the second stroke, the center plate 6 is unlocked and the set plate 6 starts running at a constant speed in the left direction by the force of the barb 8 and the operation of a governor mechanism (not shown).

The start signal of the set plate 6 is input to the IC by sliding a contact piece (not shown) on the circuit pattern, and the distance adjustment operation is started.

Here, when the subject is far away, the start signal of the center plate 6 cannot energize the conductive pattern 1C of the rotor 1, so the rotor 1 is placed in the position shown in FIGS. 3 and 4. At rest.

On the other hand, as the set plate 6 travels, the distance control lever 16 begins to move at a constant speed diagonally upward to the right from the state shown in FIG. and the pawl 1e of the rotor 1 come into contact with each other and stop in the state shown in FIG. At this time, the contact direction of the vertically bent portion 16f' of the distance control lever 16 with respect to the contact surface of the claw 1e of the rotor 1 is oriented in the rotational axis direction of the rotor 1, so that the rotor 1 is It never rotates.

The cent plate 6 travels further than the state shown in FIG. The stop pawl 12 gold is rotated clockwise to disengage the pawl 12b of the stop pawl 12 from the pawl portion 9c of the distance ring 9, and the distance ring 9 is rotated clockwise by the force of the spring 10. , the stop wheel 14 gear-coupled with this rotates counterclockwise, and the long-distance pawl 14c of the stop wheel 14 hooks the vertically bent portion 16g' of the distance control lever 16, causing the distance control lever 16 to rotate. is rotated counterclockwise about the shaft 50ak until its upper side 16c comes into contact with the pin 20c of the movable lever 20, and is stopped in the state shown in FIG. Therefore, in this state, the shadow lens barrel 11 is extended by the cam portion 9f of the distance ring 9 and set at a long distance position. In the state shown in FIG. 6, the vertical bending portion 1 of the distance control lever 16 is
6f' and the claw 1e of the rotor 1 are no longer in contact with each other.

Next, when the set plate 6 further travels to the left from the state shown in FIG. 6, a rotor energization signal is output to the IC by the contact piece (not shown), and the rotor 1 resists the force of the spring 2 and moves to the left as shown in FIG. It rotates clockwise, and its braking portion 1d comes into contact with the vertically bent portion 6b of the set plate 6, and the clockwise rotation continues completely following the travel of the set plate 6. However, at the time when the rotor 1 and the set plate 6 come into contact, the opening of the shutter blades 4 and 5 has not yet started.

Thereafter, the set plate 6 further travels, and the blade drive bin 3 of the rotor 1 opens the blades 4 and 5, and after the proper exposure amount to the film is detected by a known photometric means using the light receiving element 26, the rotor The power to 1 is cut off,
The rotor 1 is rotated counterclockwise by the force of the spring 2, and /
Close the blades 4 and 5.

Then, the set plate 6 continues to run, and stops when the hoisting motor energization switch (not shown) is switched to the motor energization side.

As a result, the camera winds one frame of film using the built-in winding motor and the well-known winding mechanism, and at the same time charges the set plate 6 and distance ring 9, and returns to the state shown in FIGS. 3 and 4. becomes.

Next, when the subject is at a medium distance, when you press the release button in the charged state as shown in Figure 4, the distance to the subject is first stored in the camera's IC, as in the case of long distances, and then The set plate 6 is unlatched and the center plate 6
The start signal is input to the IC when the contact piece slides on the circuit pattern.

Then, the IC immediately issues a rotor energization signal based on the distance signal and the start signal, and the rotor 1 is energized by known circuit means, and the braking section 1d of the rotor 1 is moved to the set plate 6.
Rotate clockwise until it abuts against the vertically bent portion 6b. At this time, the vertically bent portion 16f' of the distance control lever 16 is in a positional relationship shown in FIG.

In this state, as the set plate 6 travels, the distance control lever 1
6 slides diagonally upward to the right in the figure, and its vertical bent portion 16
In the vicinity where f' exceeds the pawl 1e of the rotor 1, an ICE intermediate signal is input from the circuit pattern on which the contact piece of the set plate 6 is sliding. Then, the IC outputs a rotor energization off signal based on the distance signal and the intermediate signal, and the rotor 1 is de-energized by a known circuit means, and the rotor 1 is turned off by the spring 2.
It returns to its original position due to the force of. After that, the vertically bent portion 16 of the distance control lever 16 further slides diagonally upward to the right.
f' and the claw 1f of the rotor 1 come into contact with each other, resulting in the state shown in FIG.

The set plate 6 continues to travel, rotates the stop claw 12 clockwise in the same way as in the case of long distance, releases the lock from the distance ring 9, and rotates the distance ring 9 to set the stop wheel 14. When rotated counterclockwise, the intermediate distance pawl 14d of the stop wheel 14 is connected to the vertically bent portion 16g of the distance control lever 16.
(e) and rotate the lever 16 counterclockwise about the shaft 50a until it stops in the state shown in FIG. 9. At this time, the photographing lens barrel 11 is set at the middle distance position by the distance ring 9. After this, the exposure operation is performed in the same manner as in the case of long distance, and the state returns to the charging state shown in FIG. 3 again.

In addition, when the subject is at a short distance, the distance control lever 16 is moved at the vertical position f portion 16f during the release operation.
' is in contact with the pawl 1g of the rotor 1, and its vertical bent portion 16
g comes into contact with the short-distance pawl 14e of the stop wheel 149, and the other operations are the same as in the case of long-distance or middle-distance described above.

Therefore, the o-evening energization timing chart for each of these distances has a waveform shown in FIG. 17(a).

Next, the operation of switching to flash photography mode and the photography operation thereof will be explained.

In the normal shooting mode shown in FIGS. 1 and 3, when you put your finger on the top of the flash device frame 41 and push it toward the right in the figure,
As shown in FIG. 10, the flash device frame 41 has a click groove 4.
1d and the click spring 40 are disengaged, the guide groove 41a slides along the shaft 36e of the flash device holding plate 36, and the click spring is released at the position where the left end of the guide groove 4ia and the left shaft 36e come into contact. 40 engages with the click groove 41C and stops.

At this time, the high cam edge 31d of the flash device detection lever 31
Since the protrusion 41b of the flash device frame 41 that was in contact with the flash device frame 41 also moves to the right of the lower cam edge 31ellU, the flash device detection lever 31 is rotated counterclockwise by the force of the spring 32, and its vertical position is FA lever 2 that was in contact with the bent part 31C
1 is also biased via the distance signal lever 22;
The distance signal lever 22 is rotated clockwise by the force of 3.
vertically bent portion 22d and vertically bent portion 16 of distance control lever 16
It stops when it comes into contact with f. On the other hand, as the flash device frame 41 moves, a charging contact (not shown) closes, and charge is supplied from the power source to the main capacitor for light emission, and at the same time, the contact contact 42 notifies the IC that the camera is in flash photography mode. .

In this state, when you point the camera at the subject and press the release button, a distance measurement device (not shown) will measure the distance to the subject, just as in the normal shooting mode described above.
After the distance signal is stored in C, the set plate 6 is unlocked and starts moving to the left, and the contact piece provided on the center plate 6 slides on the circuit pattern to start the movement. A signal is input, and in conjunction with the movement of the center plate 6, the distance control lever 16 also moves diagonally upward to the right.

Then, based on the distance signal from the distance measuring device and the position signal of the distance control lever 16 output from the set plate 6,
The rotor 1 is energized and turned off as shown in the timing chart of FIG. During the flash photography mode, the vertically bent portion 22d of the distance signal lever 22 is in contact with the vertically bent portion 16f of the distance signal lever 22, so that the distance is adjusted in conjunction with the movement of the distance control lever 16 diagonally upward to the right. The signal lever 22 rotates counterclockwise around the shaft 22a'e, and at the same time, the FA lever 21 rotates in the direction of rotation, so that its cam portion 21d is within the locus of movement of the blade drive pin 3 of the rotor 1. Coming in.

By the way, as described in the operation in the normal jar mode, the distance control lever 16 has a stopping position that differs depending on the subject distance, so the cam surface of the cam portion 21d of the FA lever 21 adjusts the cam surface of the flash device accordingly. Guide number (G
In order to obtain an appropriate aperture value according to No. 1, the aperture of the nyasota blades is formed to vary.

Therefore, by the stop setting operation of the stop car 14 and the distance control lever 16 according to the subject distance, the FA lever 21
is stopped at the corresponding position, and the set plate 6 further travels, and the rotor 1 rotates clockwise due to the energization. The shutter blades 4 and 5 are opened, and the shutter blades 4 and 5 are held at the opening diameter. Next, the camera's IC closes the shutter either when the amount of light measured by the light receiving element 26 reaches the appropriate exposure for the film, or even if the exposure has not yet reached the appropriate exposure, after the preset maximum opening time has elapsed. A signal is issued, and at the same time the power to the rotor 1 is cut off by a known circuit means, the arc tube of the flash device frame 41 emits light.

In this way, in the same way as in the normal image manipulation mode, appropriate exposure can be obtained during flash photography by changing the aperture of the shutter blade depending on the subject distance and causing the flash device to emit light.

Next, the operation of switching to the closest shadow mode and the photographing operation thereof will be described.

To switch the camera from the normal shooting mode shown in FIGS. 1 and 3 to the close-up shooting mode shown in FIGS. 2 and 12, the flash device frame 41 is pushed to the left. As a result, the flash device holding plate 36 has its protrusion 36f pushed by the flash device frame 41, rotates clockwise around the hole 36a, and stops at the position where its protrusion 36c contacts the stopper 39. At this time, the tip 33d of the reset lever 33 is moved upward in the figure by the force of the spring 19 of the proximity reset lever 18, with its tip 33d separating from the contact with the protrusion 36c, and the spring of the flash device holding plate 36 The return rotation in the counterclockwise direction due to the force of 37 is stopped. Also, at this time, the flash device frame 4
1 rotates clockwise about the hole 35a''f5 integrally with the holding plate 36, and makes the illumination direction suitable for close-up photography.

Then, as the flash device frame 41 rotates clockwise,
The flash device detection lever 31 is connected to the protrusion 41 of the flash device frame 41.
The contact surface with b is from the high cam edge 31d to the low cam bottom 3.
By moving to the 1f side, the FA lever 21 and the distance signal lever 22 are released from the FA lever 21 and the distance signal lever 22 by rotating counterclockwise in the same way as in the flash photography mode described above. On the other hand, when the flash device holding plate 36 is rotated in the first direction, the protrusion 36f moves from the cam part 44e of the finder block 44 to the lower cam part 4.
4f, the finder block 44 is rotated about the shaft 44a by the force of the spring 45 in the counterclockwise direction, that is, toward the optical axis of the photographic lens. Regarding the distance measuring system used in
As shown in the figure, the light from the light emitting element 46 is imaged onto the subject by the light emitting lens B, and the light reflected from the subject is imaged onto the light receiving element 4γ by the light receiving lens C to measure the distance. This is a triangulation method, and in the normal 4@shadow mode shown in FIG. 11(a), the distance measurement zones are distances 7, 1, 2, . With L3 as a reference, each long distance zone Z1. Medium distance zone 77.
However, as described in mI, when the finder block 440 rotates, that is, the light receiving element 4γ side rotates to switch to the close-range shadow mode, the distance measurement zone becomes distance zone Z3. No2. , and the long-distance zone Z'1. Medium distance zone Z'2. The close distance zone I3 and the far distance zone Z/ are set to overlap with the short distance zone Z3 in the normal shooting mode. Fortunately, the viewfinder field of view also rotates by the same amount as the distance measurement system, making it easier to correct short distances.

As described above, the flash device frame 41 itself also rotates clockwise in the figure with the hole 368 t = center of the flash device holding plate 36 as described above, and the amount of rotation also corrects the short distance of the light emission direction of the flash device. It is supposed to match the quantity.

Furthermore, the upward movement of the reset lever 33, that is, the counterclockwise rotation of the proximity reset lever 18, is performed by releasing the restraint on the movable lever 20 as shown in FIG. Since the position of the bin 20C of the movable lever 20 is moved northward from the position in the normal shooting mode, the distance control lever 16 is also moved upward according to the position. As a result, the amount of rotation of the distance ring 9, that is, the amount of extension and extension of the photographic lens, is increased to the near-distance side compared to the normal @ and shadow mode.

Furthermore, when the reset lever 33 is moved in the "=" direction, the display section 33e protrudes outward from the camera, as shown in FIG.
At the same time as informing the user that the camera is in the close-up photography mode, the tip 3 of the reset lever 33 is pushed in against the force of the spring 19.
3d and the projection 36c of the flash device holding plate 36 are disengaged, and the flash device holding plate 36 is rotated counterclockwise by the force of the spring 3T to return to the normal shooting mode position shown in FIG. It also has the role of letting you know.

The slide operation of the flash device frame 41 to the close-up shooting mode is performed by touching the contact piece 42b of the contact piece part 42 and the M circuit board 4.
3 on the patterns 43a and 43b, and at the same time informs the IC that it is in flash photography mode, the main capacitor for light emission is photoelectronized.
6d contacts the stepped portion 28c of the close-up lens <-28 and slides it to the left against the force of the spring 30, and the shaft 28b of the close-up lens/C-28 moves the ISO switching lever 2.
4 is rotated in the opening direction approximately around the end of the arm portion 24c, and in order to displace the position of the hole 24b, which is the ISO signal output portion, to the left in FIG.
The distance signal lever 22 to which a is fitted also controls the distance.The vertically bent portion 22d is in contact with the vertically bent portion 16f of the lever 16.
It rotates counterclockwise in the figure approximately around the center. As a result, the bin 22C of the distance signal lever 22 moves to the right in the figure, causing the FA lever 21 fitted therewith to rotate clockwise, causing the shutter blade 4 to move further than in the flash photography mode.
The cam portion 21d that comes into contact with the blade drive pin 3 of the rotor 1 moves so as to control the blades and 5 to a small aperture.

With the above settings in place, when you point the camera at the subject at a close distance as shown in Figure 13 and press the release button, the rangefinder & C rangefinder will operate in the same way as in the normal shooting mode described above. When the set plate 6 is unlocked and the seven-piece plate 6 starts running, the vertically bent portion 22d of the distance signal lever 22 also follows the movement of the vertically bent portion 16f of the distance control lever 16. Move to the right.

By the way, when the subject is in zone Z'1 shown in Fig. 11(b), that is, when the subject is in a relatively far zone in the close-up shooting zone on the near side, the baseline of the distance measuring system Since the angle α between B and C is mechanically corrected to β in the close-up photography mode, a distance measurement signal is input to the camera's distance measurement device as if the subject were very far away.

Therefore, the focus adjustment operation section of the camera operates in the same way as when the subject is far away in the normal shooting mode.

That is, even if the start signal of the set plate 6 is input to the IC, only one rotor is energized, so the vertically bent portion 16f' of the distance control lever 16 comes into contact with the long-distance claw 1e of the rotor 1, and as shown in FIG. Distance control lever 160 in the state shown
Running stops. Thereafter, the set plate 6 further travels and disengages the distance ring 9 and the stop pawl 12. As a result, the distance ring 9 is rotated in the counterclockwise direction by the force of the spring 10, and the stop wheel 14 that is gear-coupled with the distance ring 9 is rotated counterclockwise. Is the vertically bent portion 16g of the distance control lever 16? : When hooked, the distance control lever 16 rotates counterclockwise around the shaft 50a k, and as shown in FIG.
' is disengaged from the pawl 1e of the rotor 1, and it rotates further and stops when it comes into contact with the bin 20c of the movable lever 20, as shown in FIG. 16, and the feeding of the pot-shaped lens is stopped.

The amount of movement of the bin 20C is determined so that the extended position of the photographing lens at this time is the closest shadow position of the close-up shot 4 in the range shown in FIG. 11(b).

After that, the set plate 6 further travels, a rotor energization signal is output to the IC, the rotor 1 rotates clockwise, the shutter blades 4 and 5 open, and the blade drive bin 3 and the cam portion 21d of the FA lever 21 The aperture of the shank blade stops at that position and the film is exposed, but the position of contact is the same as that in the flash photography mode by the amount that the close-up lever 28 has moved to the left as described above, i.e. As the FA lever 21 rotates clockwise, the diaphragm aperture becomes smaller, so that proper exposure can be obtained when flash photography is performed on a subject at a close distance.

Then, the camera turns off the power to the rotor 1 in response to an abort signal after a preset opening time, and at the same time the flash device emits light, the shutter blades 4 and 5 also close, and the film exposure operation ends.

Thereafter, the set plate 6 is roughly moved, and the motor energization switch is switched to the motor energization side by a known means, and at the same time, the film stopper is removed. As a result, the camera winds the film and charges the shutter and photographing lens barrel operating system, and at the overcharge position, which is the final stage of the charging operation, the end 6f of the set plate 6 moves to the arm 18c of the proximity reset lever 18. The proximity reset lever comes into contact with the
-18 is rotated significantly clockwise against the force of the spring 19, and as a result, the reset lever 33 slides downward due to the force of the spring 35, causing its tip 33d and the flash device holding plate 36 to protrude. In order to release the lock from the section 36C, the flash device holding plate 36 is rotated counterclockwise by the force of the spring 37, returning to the normal photographing mode position shown in FIGS. 1 and 3. At this time, finder block 44. Needless to say, the flash device frame 41 and the parts for the FA (flash auto) mechanism also return to their normal photographing mode positions.

Then, the FiJ overcharge is over, and the cent board is 6
returns to the charge locking position and enters the normal photographing mode shown in FIG.

As explained above, the present invention automatically switches the Franche-auto mechanism normally used for flash photography to the close-up mode in conjunction with the switching operation to the close-up photography mode, thereby making it possible to use the flash device properly during close-up photography. It is possible to take photographs with accurate exposure, and the conventional flat rate automatic addition mechanism can be made compact without complicating it. Furthermore, it has the effect of making it easier to operate, such as preventing forgetting to switch the camera's photographing mode.

[Brief explanation of the drawing]

1 and 2 are perspective views showing the external appearance of the camera according to the present invention, in which FIG. 1 shows the normal arcuate mode, FIG. 2 shows the close-up shooting mode, and FIG. 3 shows the normal shooting mode. The interior of the time (an exploded perspective view of several main parts; Figures 4 to 9 are also explanatory diagrams of the operation of the focus adjustment operation section, and the charging position is in the middle of long-distance adjustment, the end of long-distance adjustment, and middle distance). The states are shown during the adjustment, also during the middle distance adjustment, and after the end of the middle distance adjustment. Fig. 10 is an exploded perspective view of the main parts of the internal mechanism in the flash pot shape state in the normal shooting mode, and Fig. 1I is the shooting mode. 12 is an explanatory diagram of the distance measurement zone by switching the rangefinder in conjunction with the switching of the distance measurement device. (a) shows the normal shooting mode, (b) shows the close-up shooting mode, and Fig. 12 shows the internal mechanism in the close-up shooting mode. Exploded perspective views of the main parts of, Figures 13 to 16
The figure is also an explanatory diagram of the operation of the focus adjustment operation section, showing in order the charging position, the middle of long distance thermal adjustment, the middle of long distance adjustment, and the end of long distance adjustment. This is an operation waveform diagram showing the timing of energization to the rotor that controls (aJ is in the normal shooting mode, (b) is also in the same flash operation, and (c) is in the close-up shooting mode.
Each is shown below. 1... Rotor, 4, 5... Shutter blade, 6...
Set plate, 9...Distance ring, 11.Photographing lens barrel, 12.Stop claw, 14.2 tosog wheel, 15
... Lens barrel connection lever, 16 ... Distance control lever, 1
8... Proximity reset lever, 20... Movable lever, 2
1...F'A lever, 22...distance 1ta (I lever, 24...ISO switching lever, 25...IS
O switching knob, 26... Light receiving element, 28... Close-up lever, 31... Flash device detection lever, 33... Reset lever, 36... Flash device holding plate, 38.39...
Stopper, 41...Flash device frame, 44...Finder block Figure 5 Figure 6 Figure 7 Figure 13 Figure 14 Figure 16 Procedural amendment March 16, 1981 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1. Indication of the incident 1982 Patent Application No. 93364 2. Name of the invention Camera flash auto mechanism 3.
Relationship with the case of the person making the amendment Patent applicant (1-6, 3-30-2, Shimomaruko, Ota-ku, Tokyo, Japan) (1) (100) Representative of Canon Co., Ltd. Ryu Sanbe 4, Agent: 105 6. Number of inventions increased by amendment None 7. Subject of amendment (1) [Claw portion 12b K
J corrects it as "the claw part 12b". (2) As shown in the attached sheet, the code 1f in Figures 5 and 6 of the drawings will be corrected to 1e and the ministry code 1et1f, respectively. Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] l Flash photography is possible using a dedicated flash device,
Additionally, some cameras have a built-in flash auto mechanism that determines the aperture value of the camera according to the film sensitivity and subject distance, and have a normal flash photography mode and a close-up flash photography mode, and film sensitivity information is not displayed in the normal flash photography mode. and a fixed axis of an addition mechanism that adds up all of the subject distance information is displaced so that the aperture value control member 1 of the flash auto mechanism is set to a small aperture in conjunction with the switching operation of the close flash operation mode. Flash auto mechanism. 2. The automatic flash mechanism according to claim 1, wherein the close-up flash photography mode automatically returns to the normal photography mode in conjunction with the winding and charging operation of the shutter or the lens extending device.