JPS6037448B2 - Camera depth confirmation device - Google Patents

Description

[Detailed description of the invention] The present application relates to an improvement of a depth confirmation device for a camera.

In general, the driving force for the aperture control mechanism of a camera is a push method in which an energizing means on the camera body operates the aperture presetting means on the lens barrel and an aperture adjusting means on the camera body. There are two main types: an escape method that operates an aperture presetting means and an aperture adjusting means. The former push method is equipped with a biasing means that overcomes the biasing force of the aperture presetting means of the lens barrel, making it easy to check depth, but it has the disadvantage that the camera becomes larger and winding becomes heavier. It was something that I had. In addition, in the latter escape method, since the aperture presetting means and the aperture adjusting means are operated by the effort of the lens barrel, no force is required for winding, and the camera can be made more compact. Although this method is effective, it has the disadvantage that depth confirmation cannot be easily performed. Nowadays, it is very advantageous to adopt the escape method, especially as cameras are required to be made more compact.

However, in a camera depth confirmation device that employs this escape method, the aperture adjustment means can be operated by operating the depth confirmation lever, and the aperture presetting means can be set to a predetermined aperture by the biasing means on the lens barrel side. This is to check the depth of the aperture by stopping down to the desired value. When performing automatic exposure photography, it was necessary to release the depth confirmation lever, recharge the aperture recognition means, and store the force of the lens barrel's force means. For this reason, it was extremely troublesome for the operator. The present invention has been made in view of the above circumstances, and by inserting an intermediate member equipped with an energizing means between the aperture presetting means and the aperture adjusting means, no operation can be performed after the depth confirmation member is released. It is an object of the present invention to provide a depth confirmation device for a camera that enables the next automatic exposure photographing to be performed without the need for it.

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

FIG. 1 shows the internal mechanism of the camera, and shows a state in which film winding and shutter charging are completed. Reference numeral 1 denotes an aperture ring, and the aperture ring is engraved with an automatic aperture EE index and a manual aperture index, and is also provided with a protrusion la and a cam portion lb.

2 is an index for matching the automatic aperture E group index and the manual aperture index.

3 is an aperture preset ring, and this aperture preset ring 3 is urged to rotate clockwise by a spring 3a.
a protrusion 3b that can engage with the protrusion la of the aperture ring 1;
have.

Further, the aperture preset ring 3 is provided with an arm 3c, and the aperture preset ring 3 determines the rotation of the bell crank via an aperture setting cam ring (not shown) using a lever 3d with a value set. is for regulating the rotation of an aperture drive ring (not shown) and determining the opening degree of the aperture. Reference numeral 4 denotes a pin provided in the aperture drive ring, and the end of this pin 4 engages with an automatic aperture lever 5 which is biased to rotate counterclockwise by a spring 5a.

This automatic aperture lever 5 has a rising portion 5b and a falling portion 5c.
The movable piece of the hold switch S2 is engaged with this falling portion 5c. - Furthermore, a bifurcated automatic throttle accumulating lever 7 and an intermediate lever 8 are pivotally attached to the automatic throttle lever 5 on the same shaft 6. The automatic aperture accumulating lever 7 is rotated clockwise by a spring 7a, and a pin 9 is fixed to the center of one side of the lever 7, and this pin 9 is connected via a spring 10 to the joint lever 1
It is pivoted to 1. One end of this common lever 11 is engaged with the rising portion 5b of the automatic aperture lever 5. 1
Reference numeral 2 denotes a hoisting shaft of a hoisting bar (not shown). A hoisting cam 13 is fixed to this hoisting shaft 12, and a cutout disc 12a is provided at the bottom of the hoisting cam 13 for coupling with the hoisting shaft of an electric drive device. Fixed.

14 is a rotatable intermediate lever, and a pin 14a provided at one end of this intermediate lever 14 engages with the winding cam 13.

Further, a pin 14b is provided at the other end of the intermediate lever 14, and this pin 14b engages with one end of the intermediate lever 8. The other end of the intermediate lever 8 is engageable with a pin 15a provided at one end of a rotatable charge lever 15. The other end of the charge lever 15 is bifurcated into two and is urged to rotate counterclockwise by a spring 15d. Reference numeral 16 denotes a shirt button, and by pressing this button, the shutter magnet 1' and the EE magnet switch S are turned on.

Reference numeral 17 is a rotatable release lever, and at one end of this lever there is a magnet for release.
c is rotatably attached.

A pin 17a is mounted on the release lever 17, and one end of the automatic throttle engagement lever 18, which is engaged with one side of the automatic throttle accumulating lever 7, is locked to this pin 17a. One end of a rotatable EE locking bar 19 is engaged with the other end of the release lever 17. A pin 17b is provided on the other end of the lever 17, and this pin 17M locks one end of a lever bar 20 which is rotatable counterclockwise by a spring 20a. A pin 20b provided at the other end of this lever 20 is engaged with a movable twill piece of a memory retention switch S3. Also,
The movable piece of the switch S3 is also locked by the planting pin 22a of the lever 22 operated by the EE lock button 21. The other end of the lever 20 is engaged with one branch 15b of the charge lever 15. Reference numeral 23 denotes an EE sector gear rotated clockwise by a spring 23a, and this sector gear 23 is locked to the other end of the locking bar 19.

Gears 24a, 24b and a stop wheel 24c forming a speed regulating mechanism 24 mesh with the sector gear 23. Further, a slider Ra of a variable resistance Ra for determining a preset aperture value is attached to the sector gear 23. A gear 25 is attached to the ball 23b of this sector gear 23.
is attached to this gear 25, and EE charge gear 2 is attached to this gear 25.
6 are in mesh. A lever 27 is coaxially attached to this gear 26.
is fixed, and this lever 27 is connected to the charge lever 15.
It is in contact with the stepped portion of the other branch portion 15c. A pin 23c is installed in the sector gear 23, and this pin 23
The end face of c is a signal lever 29 pivotally connected to the support lever 28.
is fixed. Reference numeral 91 denotes a slide lever, which can be moved up and down by a guide pin 92 provided as a shield on the main body.

The bent portion 91a of the slide lever 91 locks the arm 3c of the aperture preset ring 3. Therefore, the sector gear 23 is strongly biased clockwise by the spring 3a against the spring 23a which is biased counterclockwise on the sector gear 28. 93 is the slide lever 91
This spring 93 is stretched between the signal lever 29 and the signal lever 29, and this spring 93 pulls the slide lever 91 in the direction of contacting the signal lever 29 with a force stronger than that of the spring 3a.

One end 91b on the slide lever 91 is in engagement with a lever bar 94 that is swingable about a shaft 94a. Reference numeral 95 denotes a depth confirmation aperture lever, and when it is moved in the direction of arrow A, its end 95a rotates the automatic aperture lever 5 clockwise, and the slide lever 91 is moved in the vertical direction in the drawing via the lever 94.

Mg, is a magnet for aperture control, and this magnet Mg
, is designed to be able to suction the iron piece 31 attached to the suction lever 301. This suction lever 30 has a spring 31
The lever 3 is rotated and biased counterclockwise by a.
One bent end of the 0 is capable of engaging with a stop wheel 24c of the telephoto mechanism 24. Further, one branched end of the charge lever 15 and one end of the manual clamp lever 32 are in contact with the end of the suction lever 30 . A pin 3 is attached to the other end of this clamp lever 32.
2a is provided, and this pin 32a engages with a concave portion at one end of the transmission lever 33. This transmission lever 33 is connected to a spring 33
The movable member of the manual switch S4 is energized to rotate in the counterclockwise direction by the pin 33b, which is planted therein. Such a transmission lever 33
The other bent end is locked to a lever bar 34. A pin 34' is installed on the lens side, and the end surface of this pin 34' abuts against the cam portion lb of the aperture ring 1.
35 is a mirror drive lever having a delay device (not shown);
The mirror drive lever 35 is rotated counterclockwise by a spring 35a, and has one end locked to the other side of the automatic aperture accumulating lever 7, and the other end to one end of the leading curtain tensioning lever 36. configured to engage.

The tip tensioning lever 36 is urged to rotate counterclockwise by a spring 36a, and its tip engages with a shield pin 37a of the tip gear 37. This leading gear 37 meshes with a leading pinion 38 of a leading drum (not shown). Further, a mirror tension lever 39 is pivotally attached to the protrusion 35b of the mirror drive lever 35. The mirror tensioning lever 39 is rotated clockwise by a spring 39a stretched between the mirror drive levers 35, and one end is engaged with the push-up lever 4 which is pivotally connected to the mirror drive lever 35. There is. This push-up lever 4 and mirror drive bar 3
It is rotated clockwise by a spring 40a stretched between the mirror levers 5 and 5, and the other end is locked to a shield pin 41a of a mirror flip-up lever 41. This mirror flip lever 4
The other end of 1 is a flip-up pin 42 provided on a mirror 42.
A is locked. This mirror 42 is rotatable around a mirror shaft 42b. 43 is the front curtain gear 37
This rear curtain gear 43 is provided separately and coaxially with the rear curtain gear 43.
is meshed with a trailing pinion 52 for a trailing drum (not shown).

Further, a pin 43a is provided on the rear curtain gear 43 as a shield. Reference numeral 44 denotes an attraction lever rotated by the pin 43a, and the attraction lever 44 is adapted to be attracted to the shutter control magnet Mg2 by the iron piece 44a.

Reference numeral 45 denotes a rear grave signal lever which is rotated by the pin 43a, and this lever 45 is always held by the locking pin 4 by a spring 45a.
It is rotatably held at position 5b. The switch S6 is a trailing curtain signal switch that is turned on when the trailing curtain signal lever rotates clockwise. 46 is a three-pronged lever, the first end of this lever 46 is fixed to the other end of the lever 45, the second end is fixed to the shield pin 39b of the mirror locking lever 39, The third end is the common lever 1
1 is locked at the other end.

The transmitted light of the photographic lens (not shown) is transmitted through a mirror 42, a focus plate 47, a condenser lens 48, and a vantaprism 49.
are visually recognized by the photographer through the eyepiece 50 in order. 51 is a light receiving element such as a silicon blue cell.

Here, FIG. 2 shows the exposure control circuit of the camera shown in FIG. 1, and the same parts as in FIG. 1 are designated by the same reference numerals and will be explained.

E is a power supply, and this power supply B is connected to a side light circuit 70, a release circuit 71a, and an aperture control circuit 71 via a power switch So.
, an electronic shutter control circuit 72 is connected, and an aperture display circuit 73 is connected between the side light circuit 70 and the aperture control circuit 71. In the lead circuit 71a, a delay circuit 86 is connected in series with the switch S and the lead magnet Mgo. The delay circuit 86 delays the timing of excitation of the release magnet Mgo so that the shirt release is performed after the magnet Mg is excited. Note that if this delay time can be created by a delay time of mechanical operation, a delay circuit is not necessary. In the side optical circuit 701, 74 is an amplifier connected between the power supply E, and a light receiving element 51 is connected between the first input terminal and the second input terminal of this amplifier 74, and
A compressor diode 75 is connected between the output terminal of the amplifier 74 and the second input terminal. The output signal of the amplifier 74 is then sent to an arithmetic unit 76 that performs an abex operation.
It is adapted to be applied to the first input terminal of. Further, a shirt speed setting circuit 7 is connected to the second input terminal of the calculator 76.
A shutter speed setting signal from 7, a film sensitivity setting signal from a film sensitivity setting circuit 78, and an exposure correction information signal from an exposure correction information circuit 79 are applied. Further, a resistor 80 is connected between the second input terminal and the output terminal of the arithmetic unit 76. The output signal of this arithmetic unit 76 is then added to a terminal 67 as an aperture display circuit 73. Further, the output signal of the arithmetic unit 76 is supplied to the aperture control circuit 71 and applied to the capacitor 81 and the first input terminal of the comparator 82 via the switch S3. Manual switch S4 is connected to this comparator 82.
, a switch S having a hold switch S2 connected in parallel, and the power switch So are connected to a power source E in series. Further, a second input terminal of the comparator 82 is connected to a connection point between the constant current circuit 85 and the variable resistor ka. Furthermore, the output signal of the comparator 82 is applied to the magnet Mg. Excitation control is performed. In the electronic shirt control circuit 72, 83 is a Schmitt circuit connected to the power source E, Rs is a variable resistor whose resistance value changes according to the shirt speed setting signal of the shirt speed setting circuit 77,
This variable resistor Rs has a start switch S5 connected in parallel and a capacitor 84 connected in series to form a time constant circuit. A connection point between the variable resistor Rs and the capacitor 84 is connected to a first input terminal of a Schmitt circuit 83, and a second input terminal of the Schmitt circuit 83 is grounded. The output signal of this Schmitt circuit 83 controls the shirt starter control magnet Mg2. Next, the operation of the above configuration will be explained. First, a case will be described in which photographing is performed using the shutter-first EE. First squeeze ring EE
When the index is aligned with index 2 as shown, the cam portion l
Since the lever 33 is pushed due to the contact relationship between the pin 34a and the transmission lever 33, the transmission lever 33 rotates clockwise, turning on the manual switch S4 and turning on the clamp lever.
32 is rotated in all directions to release the clamp of the suction lever 30. Then, when the power switch So is turned on, the crossover optical circuit 70 becomes operational. That is, the transmitted light of the photographic lens is incident on the light receiving element 51. Therefore, the output corresponding to the brightness from the light receiving element 51 is output to the amplifier 74.
and is supplied to the first input terminal of the arithmetic unit 76 via the log diode 75. Further, the second input terminal of the calculator 76 receives a shirt speed setting signal from a shirt speed setting circuit 77, a film sensitivity setting signal from a film sensitivity setting circuit 78, and exposure correction information from an exposure correction information setting circuit 79. A signal is provided. The arithmetic unit 76 performs abex calculation based on these supplied signals. The output signal of the arithmetic unit 76 is supplied to the meter 67 of the aperture value display circuit 73 to display the aperture value, and the capacitor 81 is charged and supplied to the first input terminal of the comparator 82. Then, when the shirt button 16 is pressed down, the switch S,
turns on. As a result, the comparator 82 uses its output to energize the magnet Mg, and the Schmitt circuit 83 uses its output to energize the magnet Mg2 and lock the rearward gear 43. Switch S. After turning on, the lead magnet M is energized after a certain period of time in the delay circuit 86, and the lead lever 17 is rotated counterclockwise by attracting the iron piece 17c. As a result, the lever 20 rotates in the clockwise direction, and the switch S
3 is turned off and the charging voltage of the capacitor 81 is stored and held. Also, when the lever 20 rotates, the charge lever 1
5, the charge lever 15 rotates in the direction of the rebound indicator and retreats from the rotation blocking position of the suction lever 30 and lever 27. Further, as the shutter release lever 17 rotates counterclockwise, the stop lever 19 rotates counterclockwise to release the engagement with the sector gear 23. As a result, the sector gear 23 is rotated clockwise by the spring 23a and the preset ring spring 3a. Therefore, the gears 24a, 24b, and 24c forming the logical speed mechanism 24 rotate, and the stop wheel at the final stage is rotated counterclockwise. In addition, the rotation of the sector gear 23 causes the variable resistance Ra to
The slider Rai is slid. This change in resistance value is detected by the comparator 82, and when it reaches a predetermined level, the comparator 82
The output of the magnet Mg becomes 0, and the magnet Mg is de-energized.
For this reason, the suction lever is rotated in the rebound direction by the spring 31a, and its bent portion engages with the stop wheel 24c to stop the rotation of the stop wheel 24c. Therefore, the position of sector gear 23 is determined. Further, the rotation of the sector gear 23 is controlled by the signal lever 29 via the pin 23c.
is moved downward, so the aperture preset ring 3 with the arm 3c locked to the signal lever 29 rotates clockwise while being followed by the spring 3a and is stopped. Therefore, when the rotation of the sector gear 23 stops as described above, the aperture reset ring 3 is rotated to the position of the appropriate aperture value.
This determines the position of the bellcrank. In other words,
The stop position of the aperture preset ring 3 is an aperture value determined based on information from the light receiving element 51 that receives side light through the photographic lens, set photographic speed, film sensitivity, and exposure correction information. On the other hand, the automatic throttle mechanism also starts substantially parallel to the start of such EE operation. That is, when the release magnet Mgo is excited and the release lever 17 is rotated counterclockwise, the automatic aperture engagement lever 18 is rotated counterclockwise by the pin 17a. Therefore, the automatic throttling energy storage lever 7 rotates clockwise. Therefore, the common lever 11 is also rotated clockwise to rotate the automatic aperture lever 5 clockwise. For this purpose, the hold switch S2 is turned on and a pin 4 provided in the aperture drive ring is operated to narrow down the aperture according to the preset position of the bell crank. Further, by the clockwise rotation of the automatic aperture accumulating lever 7, the mirror drive lever 35 is rotated counterclockwise by the spring 35a. Therefore, the mirror flip-up lever 41 is rotated counterclockwise by the coaxial push-up lever 401. This causes the mirror 42 to be flipped up.
Along with this flip-up operation of the mirror 42, a delay device (not shown) operates, and after the delay time of the delay device, the front curtain tensioning lever 36 is rotated clockwise by the mirror drive lever 35. The purpose of this delay time is to start the shutter after the time elapses from the maximum aperture to the minimum aperture, as shown in FIG. As a result, the leading gear 37 starts to rotate and causes the leading curtain to travel via the leading pinion 38. As the leading curtain runs, the start switch S5 is turned off in a known manner, and after a time period determined by the variable resistor Rs and the capacitor 84, which has a resistance value according to the set temperature, the Schmitt circuit 83 is turned off and the magnet M& is turned off. Make it in an excited state. For this reason, the suction lever 4
4 is released, the trailing gear 43 begins to rotate and causes the trailing curtain to travel via the trailing pinion 52. Also, at the end of trailing curtain travel, the trailing curtain gear 43
As a result of the rotation, the rear curtain signal lever 45 is rotated clockwise by the pin 43a, and the three-pronged lever 46 is rotated counterclockwise, and the switch S6 is turned on. This three-pronged lever 4
6, the mirror tensioning lever 39 is pushed down and rotated counterclockwise to release the engagement with the push-up lever 40. Therefore, the push-up lever 4 is rotated clockwise by the spring 40a, and the mirror flip-up lever 41 and mirror 42 are returned to their original positions by a return spring (not shown). Also, by rotating the three-pronged lever 46, the common lever 1
1 rotates clockwise to the rising part 5 of the automatic aperture lever 5.
Evacuate from b. Therefore, the automatic aperture lever 5 is operated by the spring 5a.
As a result, the rebound meter rotates in all directions, and the shield pin 4 of the aperture drive ring returns to its original open state. When the winding operation is performed by the winding shaft 12, film winding and shirt charge are performed, and the intermediate lever 12
The charge lever 15 is charged through the levers 4 and 8, and the automatic diaphragm mechanism and mirror mechanism are charged, and the portions that were disengaged due to the release operation are re-engaged and returned to the state shown in the figure. be. Furthermore, since the switch S2 is always turned off via the lever 22 by pressing the EE lock button 21, subsequent imaging can be performed using the value stored in the first capacitor 81.

Next, the case of performing it manually will be explained. First, when the desired aperture value of the aperture ring 1 is matched with the index 2, the pin 34a is removed from the cam part lb, so the transmission lever 33 is rotated counterclockwise and the manual switch S4
is turned off and the clamp lever 32 is rotated clockwise to clamp the suction lever 30. Then, when the power switch So is turned on, the side light circuit 70 becomes operational as in the case of shirt starter priority. When the shirt button 16 is pressed down, the switch S is turned on, so that the Schmitt circuit 83 uses its output to excite the magnet Mg2 and lock the rear curtain gear 43. At this time, the aperture control circuit 71 is not in an operating state because the switch S4 is off. Further, when the switch S is turned on, the release magnet is excited after a certain period of time by the delay circuit 86, and the iron piece 17c is attracted, so that the release lever 17 is rotated counterclockwise. As a result, the lever 20 rotates clockwise and disengages from the charge lever 15, so that the charge lever 15 rotates counterclockwise and retreats from the rotation blocking position of the lever 27. Further, when the release lever 17 is rotated counterclockwise, the locking bar 19 is rotated counterclockwise to release the engagement with the sector gear 23. Therefore, sector gear 23
is rotated clockwise by the spring 23a, so the pin 23c
The signal lever 29 is moved downward via the . Therefore, the aperture preset ring 3 with the arm 3c locked to the signal lever 29 is rotated by the spring 3a to the position of the protrusion la of the aperture ring. As a result, the aperture preset ring 3 is rotated to the position of the set aperture value, thereby determining the position of the bell crank. Furthermore, by rotating the release lever 17 counterclockwise, the automatic aperture mechanism also starts.

That is, by rotating the release lever 17, the automatic aperture engagement lever 18 is rotated counterclockwise, the aperture is narrowed down in the same way as when priority is given to the shutter, the mirror 42 is raised, and the shutter is started. It is something. Even after this shirt starter control, the mirror 42 and the automatic aperture lever 5 are restored in the same manner as in the case of shirt evening priority. Next, the case where depth confirmation is performed will be explained.

When the desired aperture value of the aperture ring 1 matches the index 2 and the depth confirmation aperture lever 95 is moved in the direction of arrow A, the lever 94 rotates clockwise and the slide lever 91
is moved downward against the spring 93, so the aperture preset ring 3 is rotated by the spring 3a to the position of the protrusion la of the aperture ring 1. As a result, the aperture preset ring 3 is rotated to the position of the set aperture value, and the position of the bell crank is determined. At the same time, the automatic aperture lever 5 is rotated clockwise by the aperture lever 95, and the pin 4 mounted on the aperture drive ring is actuated to narrow down the aperture according to the preset position of the bell crank. When the depth confirmation aperture lever 95 is released from being pushed in the direction of arrow A, the slide lever 91 moves upward by the spring force of the spring 93 against the spring pressure of the spring 3a, and returns to its original position along with the lever 94 and the aperture preset ring. It returns to the position. At the same time, the automatic aperture lever 5 is rotated counterclockwise by the spring 5a, and the shield pin 4 of the aperture drive ring returns to its original open state. FIG. 3 shows a second embodiment of the present invention.
Components that are the same as those in the figures are designated by the same reference numerals, and their explanations will be omitted.

Reference numeral 101 denotes a swinging lever coaxially connected to the sector gear 23. A spring 102 is stretched between the swinging lever 101 and the sector gear 23, and the arm 3c is engaged with the end of the swinging lever 101. A signal lever 29 is pivotally mounted.

When this signal lever 29 is pushed by the aperture lever 95 for depth confirmation, the signal lever 29 rotates counterclockwise against the spring 102, so the aperture preset ring 3 is rotated to the position of the set aperture value, and at the same time the aperture preset ring 3 is rotated to the position of the set aperture value. The aperture lever 5 is rotated to narrow down the aperture. When the pressure on the depth confirmation aperture lever 95 is released, the spring pressure of the spring 102 is transmitted to the signal lever 29 via the swing lever 101, and the signal lever 29 rotates clockwise, causing the aperture preset ring 3 returns to its original position and the diaphragm returns to its original open state. FIG. 4 shows a third embodiment of the present invention, in which the same parts as in FIG. 1 are denoted by the same reference numerals and their explanation will be omitted.

111 is a rack corresponding to the sector gear in FIG. 1, and a swing lever 112 as an intermediate member is provided between this rack 111 and the arm 3c.
The arm 3c is locked to the protrusion 112a, and a spring 113 is stretched between the swing lever 112 and the rack 111.

This swinging lever 112 is connected to the aperture lever 95 for depth confirmation.
When the aperture preset ring 3 is pushed in the direction of the arrow shown in the figure, the aperture preset ring 3 is rotated by the spring 3a to the position of the set aperture value, and the aperture is narrowed down. When the pressure on the aperture lever 95 is released, the swing lever 111 moves upward due to the spring force of the spring 113, the aperture preset ring 3 returns to its original position, and the aperture returns to its original open state. be. FIG. 5 shows a fourth embodiment of the present invention.
Components that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

121 is a drum coaxially fixed to the sector gear 23, and between this drum 121 and the roller 122 is a movable pulley 12.
3 and fixed pulleys 124 and 125, a thin strip 126 is spanned therebetween.

The roller 122 moves the fixing member 12 while locking the arm 3c.
7 is movable. A string 130 is stretched between the movable pulley 123 and the slide lever 128 via a fixed pulley 129. This slide lever 128
is locked to the depth confirmation lever 95 and biased by a spring 130. However, when the depth confirmation lever 95 is not operated, the drum 121 rotates in accordance with the rotation of the sector gear 23 in the illustrated state, and the position of the roller 121 is determined. When rotated,
The slide lever 128 is moved to the position of the stopper 31 by the spring pressure of the spring 130. For this reason, the string 129 becomes loose and the arm 3c is moved by the spring 3 of the aperture preset ring 3.
a pushes the roller 121 downward, the aperture preset ring 3 is rotated to the position of the set aperture value, and the aperture is narrowed down. Then, when the slide lever 128 is pressed against the spring 129, the slack in the narrow strip 126 is removed, the roller 121 moves upward, the aperture preset ring 3 returns to its original position, and the aperture returns to its original open state. This is the result. Here, 132 is a fine 12 when checking the depth.
This is a spring that prevents excessive loosening of 6. Also, as shown by the dotted line, if the protrusion 128a of the slide lever 128 is pushed with the depth confirmation lever 95', and the spring 130' is biased in the opposite direction, the depth can be confirmed when the depth confirmation lever 95' is pushed. If the pressure is released, it will return to its original state. As described in detail above, according to the present invention, an intermediate member equipped with a biasing means is inserted between the aperture presetting means and the aperture adjusting means in the depth confirmation bag of a camera employing the escape method. By doing so, you can take the next auto-exposure shot without having to perform any operations after the depth confirmation member is released, which eliminates the hassle of conventional methods and is extremely effective in conjunction with the shift to 4-inch cameras. It is possible to provide a camera depth confirmation device.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the internal mechanism of a camera according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the camera shown in FIG. 1, and FIG.
The figure is a block diagram of main parts showing a second embodiment of the present invention, FIG. 4 is a block diagram of main parts showing a third embodiment of the present invention, and FIG. 5 is a block diagram of main parts showing a fourth embodiment of the present invention. It is a main part configuration diagram. 1... Aperture ring, 3... Aperture preset ring, 3c
...Aperture preset ring arm, 4...Aperture drive ring shield pin, 5...Automatic aperture lever,
23...Sector gear, 29...Signal lever, 91...Slide lever, 93...Spring, 9
5... Depth confirmation aperture lever, 101/...
... Swinging lever, 102 ... Spring, 111.
．．・．． ．．・Hook, 112... Swing lever, 1
13...Spring, 121...Drum, 12
2...Roller, 126...Thin, 128...Slide lever, 130. ．．・．． ．． ·Spring,. Festival/Fig. 2 Fig. 3 Fig. 4 Hair drawing

Claims (1)

[Scope of Claims] 1. Both the aperture presetting means and the aperture adjusting means on the camera body side can be operated by the first urging means provided in the lens barrel, and the aperture adjusting means can be operated. The locking means locks at the initial position to bring the urging force of the first urging means into an active state, and the locking of the locking means is released by the release operation of the camera, thereby increasing the urging force of the first urging means. In the camera, the aperture adjusting means is actuated by the applied force, and the aperture presetting means narrows the aperture to a predetermined aperture value by interposing an intermediate member between the aperture presetting means and the aperture adjusting means. At the same time, a second biasing means having a stronger biasing force than the first biasing means is provided between the intermediate member and the aperture adjusting means, and the intermediate member is inserted by operating the depth confirmation member. By pressing against the urging force of the second urging means, the aperture preset means is narrowed down to a predetermined aperture value, and when the depth confirmation member is released, the aperture is set by the urging force of the second urging means. A depth confirmation device characterized by returning a preset means to its original position. 2. The depth confirmation device for a camera according to claim 1, wherein the first and second biasing means are springs.