JPS6238692B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a camera warning device that issues a warning each time a set value is changed when setting photographic information.
In recent years, efforts have been made to digitize cameras to improve their operability, simplify their mechanisms, and automate them. However, the majority of operating units for setting camera shooting information are still dial-type, which are manually set by the photographer. Setting photographic information using a dial is one of the obstacles to promoting electronic cameras. This is particularly noticeable in cameras that allow various shooting modes to be selectively set with a single camera. In order to solve these problems, the applicant has previously proposed a camera that allows setting of photographing information, including selection and setting of various photographing modes, by operating a switch. With such cameras, the value of the shooting information changes from moment to moment while the switch is being operated, and the display indicates when the changing shooting information value has reached the desired value. By ceasing the switch operation when confirmation is made, the value of the photographing information is set to the desired value. However, this type of shooting information setting method is inferior to the conventional mechanical setting method because the photographer does not feel a mechanical click when changing the shooting information, so it is inferior to the conventional mechanical setting method. be. The present invention has been developed in view of the above-mentioned circumstances, and it generates a pulse in response to the switch operation of an external operation switch, synchronizes with the timing when the content of the photographing information counter changes due to the pulse, and generates a warning sound every time the content changes. Therefore, it is an object of the present invention to provide a warning device for a camera that allows the user to confirm the change status of the set value of photographic information using sound. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the appearance of the camera body, and a winding lever 1 and a rewinding knob 2 are arranged at both ends of the upper surface of the camera. On the top of the camera on the winding lever 1 side, there is a release button 3,
Operation buttons 4 ₁ , 4 ₂ , 4 ₃ and display windows 5 ₁ , 5
₂ and 5 ₃ are arranged side by side, and a safety button 6 is provided on the top surface of the camera on the rewind knob 2 side. Also,
A card insertion slot 7 is provided on the front side wall of the camera body, and a program card 8 is inserted into this insertion slot 7.
It is now possible to insert . This program card 8 includes cards for shutter priority mode, aperture priority mode, shutter priority magic mode, aperture priority magic mode, and program shooting mode.
There are ₁ to 8 _{and 5} , and the photographer can select the one that best suits his or her preference. Card 8 selected for this insertion slot 7
When you insert the card, the camera's shooting mode will be fixed to the mode of the selected card. 9
is a set value shift knob as an operating member, and by operating this shift knob 9 and pressing a ready button 10 as a safety button, the set value can be shifted. The operation button ₄₁ is used to switch the shooting mode. When you remove the card 8 and press the operation button ₄₁ while pressing the safety button 6, the various shooting modes will change over time and the shooting mode will change. It can be visually recognized from the display window ₅₁ . The operation button 4 ₂ is used to set the film sensitivity, and while pressing the safety button 6, press the operation button 4 _2.
When is pressed, the film sensitivity changes over time, and at the same time, the film sensitivity can be visually checked from the display window ₅₂ . The operation button ₄₃ is used to set the number of sheets of film, and the number of sheets of film changes with the passage of time, and at the same time, the number of sheets of film can be visually checked from the display window ₅₃ . The shift knob 9 is used to set the setting values that should be prioritized, but when the preparation button 10 is pressed and the shift knob 9 is slid upward or downward, the set values change over time and at the same time. It is visible from the display window ₅₁ , and the shutter speed is set in shutter priority mode or its magic mode, the aperture value is set in aperture priority mode or its magic mode, and it is not set during program shooting. be. 59 is a warning control button. Here, _Fig . 2 shows the internal mechanism _of the camera shown in Fig. ₁ .
0 are the release button, operation button, safety button, and preparation button shown in FIG. 1, and 8 and 9 are the program card and shift knob, respectively. The figure shows the hoisting completed state. 101
is an aperture ring, and this aperture ring 101 is engraved with an automatic aperture AE index and a manual aperture index.
The aperture ring 101 is set for automatic exposure shooting by matching the AE index with the fixed index 102, and presses the AE signal pin 142 with the cam portion 101b to perform AE.
Rotate the switching lever 143 clockwise to select the contact piece 1.
60, and an auto/manual changeover switch _S6 formed from both is turned off. Reference numeral 103 denotes an aperture preset ring, which is rotated clockwise by a spring 103a and has a protrusion 10 that can engage with the protrusion 101a of the aperture ring 101.
3b. Also, aperture preset ring 1
03 is provided with an arm 103c, and furthermore, the aperture preset ring 103 is connected to the implanted lever 103.
d determines the amount of rotation of the bell crank via an aperture setting cam ring (not shown), and this bell crank determines the opening degree of the aperture by regulating the rotation of the aperture drive ring (not shown). 104 is a pin implanted in the aperture drive ring, and this pin 1
The end of 04 is engaged with an automatic aperture lever 105 which is biased to rotate counterclockwise by a spring 105a. This automatic aperture lever 105 has a rising portion 105.
It has c. Further, an intermediate lever 107 is pivotally attached to the automatic aperture lever 105 on the same shaft 106.
108 is a hoisting shaft of the hoisting lever 1 shown in FIG.
A hoisting cam 109 is fixed to the end surface of this hoisting shaft 108. 110 is a rotatable lever, and a pin 110 is provided at one end of this lever 110.
A is engaged with the hoisting cam 109. Further, a pin 110b is provided at the other end of the lever 110, and this pin 110b engages with one end of the intermediate lever 107, and also engages with one end 111a of the mirror drive lever 111. Also, a pin 110c provided on the lever 110 charges the first tensioning lever 113. The other end of the intermediate lever 107 can engage with a pin 112a provided at one end of a rotatable charge lever 112.
This charge lever 112 is urged to rotate counterclockwise by a spring 112d. Mg ₂ is an electromagnet with a permanent magnet for first tensioning, and is attached to the first tensioning lever 113.
The suction piece 113a at one end can be suctioned, and the pin 113b implanted at the other end of the lever 113 is engaged with one end 114a of the release lever 114.
This lever 113 is urged to rotate clockwise by a spring 113c. Also, when the lever 110 rotates clockwise, the pin 110c
The lever 113 is rotated counterclockwise by one end 113d of the lever 113 against the spring 113c. A pin 1 is attached to one end of the release lever 114.
14b is implanted, and this pin 114b has one end 115 of the mirror drive engagement lever 115 engaged with one side 111c of the mirror drive lever 111.
a is locked. And release lever 1
One end of a rotatable AE locking lever 116 is locked to the end portion 114d of 14. Further, the release lever 114 is urged to rotate clockwise by a spring 114f. Also, the spring 114f is the spring 1
This is a weaker spring than 13c. Reference numeral 118 denotes an AE sector gear, and this sector gear 118 is locked to the other end of the locking lever 116. A stop wheel 119c is meshed with this sector gear 118 via gears 119a and 119b among the gears forming a speed regulating mechanism. This gear 119a, 1
19b and 119c form a speed regulating mechanism. The sector gear 118 also includes a slider ₁₁ of a sieve-tooth switch S11 for determining the aperture preset value.
8b is attached. This slider 118b is capable of sliding on the comb-like contact piece 161. A gear 120 is attached to the shaft 118a of this sector gear 118, and this gear 120 has an AE
Charge gear 121 is in mesh. gear 121
A lever 127 is fixed coaxially, and this lever 1
27 is the other end 112 of the charge lever 112
It is in contact with e. A pin 118d is installed in the sector gear 118, and the end surface of the pin 118d is attached to the signal lever 1 which is pivotally connected to the support lever 128.
It is fixed at 29. The bent end of the signal lever 129 locks the arm 103c of the aperture preset ring 103. The AE sector gear 118 has a spring 11 rotated counterclockwise on the sector gear 118 by the spring 103a.
8c, it is strongly rotated clockwise. Mg ₁ is an aperture control magnet, and when this magnet Mg ₁ is not energized, no attraction force is applied. In addition, when the magnet Mg ₂ and the magnet Mg ₃ (described later) are magnets with permanent magnets and are energized, the magnetic force acts in the opposite direction to the magnetic force of the permanent magnet, resulting in a state where there is no attractive force as a whole. It is what it is. Therefore, when the magnet Mg ₁ is not energized, the magnet Mg 1 is biased by the spring 150a.
It is designed to be locked by a holding lever 150. The adsorption lever 130 of the magnet Mg ₁ is attached to the spring 1
It is rotationally biased counterclockwise by 31a,
One bent end of the lever 130 can engage with a stop wheel 119c of the speed regulating mechanism 119. Further, the other end step portion 112f of the charge lever 112 is in contact with the other end portion of the suction lever 130. 171 is a locking lever of the suction lever 130, and this locking lever 171 is biased clockwise by a spring 171a so as to interlock with the interlocking lever 170 biased counterclockwise by a spring 170a. This locking lever 171 locks the suction lever 130 via the interlocking lever 170 when the preset ring 103 is removed from AE and the switching lever 143 is rotated counterclockwise, and when set to AE. In this case, the suction lever 130 is not locked. The mirror drive lever 111 has a delay device (not shown), and the mirror drive lever 111 is rotated counterclockwise by a spring 11d, and one end of the mirror drive lever 111 is connected to the other end of the mirror drive engagement lever 115. 115b, and is arranged at a position where the other end can be engaged with one end of the leading curtain tensioning lever 133. The leading curtain tensioning lever 133 is biased to rotate counterclockwise by a spring 133a, and its tip engages with a planted pin 134a of the leading gear 134. Also, the pin 13 planted on the leading gear 134
4b, which is engaged with the count start switch _S10 . This front curtain gear 134 meshes with a front curtain pinion 135 of a front curtain drum (not shown).
Also, the rotation part 1 of the mirror drive lever 111
A mirror tensioning lever 136 is engaged with 11b. This tensioning lever 136 is rotated counterclockwise by a spring 136a stretched between mirror push-up levers 137. One end 137a of the push-up lever 137 is configured to be rotated clockwise by a mirror-up operation from the outside (not shown), so that the mirror can be raised independently. The other end of this push-up lever 137 is attached to a flip-up pin 1 provided on the mirror 138.
38a is locked. This mirror 138 is rotatable about a mirror shaft 138b. 138c is a mirror return spring. 1
Reference numeral 39 denotes a rear curtain gear coaxially provided separately from the front curtain gear 134, and this rear curtain gear 139 meshes with a rear curtain binion 139 for a rear curtain drum (not shown). Further, a pin 139a is installed on the trailing gear 139. 140 is a suction lever rotated by the pin 139a, and this suction lever 140
is adapted to be attracted by the iron piece 140a to the shutter control permanent magnet _Mg3 . This suction lever 140 is always held by a spring 140b so as to be rotatably held by the magnet _Mg3 . Reference numeral 141 denotes a trailing curtain signal lever that is rotated by the pin 139a, and this lever 141 is always rotatably held at the position of the locking pin 141b by a spring 141a. The mirror tension lever 1
The end portion 136b of 36 is connected to the trailing curtain signal lever 141.
It is locked to. Here, when talking about each switch and terminal, _S1 is a mode setting operation button ₄ as a movable contact piece, and a contact piece 1 as a fixed contact point.
The switch _S2 formed by 62 is a changeover switch that is changed over by the shift knob 9, and this changeover switch _S2 has a movable contact piece ₉₁ and a changeover contact a,
Formed by b and c. _S3 is a switch formed by a film sensitivity setting operation button ₄₂ as a movable contact piece and a contact piece 163 as a fixed contact;
_S4 is a switch formed by the film sensitivity setting operation button ₄₁ as a movable contact piece and a contact piece 164 as a fixed contact, and _S5 is a switch formed by a safety button 6 as a movable contact piece and a contact piece 165 as a fixed contact. The switches S ₅ ' are formed by the ready button 10 as a movable contact and the contact piece 168 as a fixed contact, S ₆ is the above-mentioned auto/manual changeover switch, and S ₇ is a switch for the rear curtain gear 139. A switch _S8 that is turned on by rotation is a switch that is turned on by the first stroke of the release button 3, and this switch _S8 is formed by the release button 3 as a movable contact piece and the contact piece 166 as a fixed contact. S ₉
is a switch that is turned on by the second stroke of the release button 3, and this switch _S9 is formed by the release button 3 and a contact piece 167 as a fixed contact. _S10 is a switch that is turned off when the front curtain gear 134 rotates, _S11 is the comb-shaped switch mentioned above, and _S12 is a switch that is turned off when the back cover is opened. S ₁₃ is button 59
and a contact piece 173, m ₁ to _{m 7}
are input terminals of the program card 8, and these input terminals _m1 to _m7 and the conductive portion of the card 8 function as a switch. 156 is the maximum aperture of the interchangeable lens.
Opening correction pins have different lengths depending on the value, 154 is an interlocking lever that is in contact with the correction pin 153 by a spring 154a, and n ₁ to _{n 4} are slides that slide on the code plate 168 according to the rotation of the interlocking lever 154. The switch N ₁ is made up of the sliders n ₁ to _{n 4} and the code plate 168.
Form ~ _N4 . Reference numeral 155 is a sounding element attached to the back cover of the camera body, and 156 is a contact point for sounding signals, which emits a warning sound when the number of remaining films falls below a predetermined number. 3 and 4 show the exposure control circuit of the camera shown in FIGS. 1 and 2, and FIG. 3 shows the exposure control circuit of the camera shown in FIGS.
This figure shows the input circuit, power supply circuit, release circuit, and external display circuit of each switch shown in the figure.
The diagram shows a part of the input circuit of each switch shown in Figure 1.
It shows a photometric calculation circuit and a finder display circuit. First, the circuit shown in FIG. 3 will be explained. In this figure, S ₁ to S ₉ and m ₁ to m ₇ are each switch and each terminal shown in FIG. 2. E is a power supply, the negative side of this power supply E is grounded, and the positive side is
It is mainly applied as VBAT to each circuit shown in FIG. 3, and is also applied mainly to each circuit shown in FIG. 4 as V _CC via the emitter-collector of transistor _Tr1 . This transistor Tr ₁ forms a constant voltage circuit 11 together with its bias resistors R ₁ and R ₂ . 12 is the program card input section,
This input section 12 has terminals m ₁ to _{m 7} arranged in parallel so that it can contact the program card 8. Among these, terminal _m7 is grounded, and when card 8 is inserted into this terminal _m7 , various settings are made depending on whether or not the other terminals _m1 to _m6 are connected. There is. That is, the conductive portion of the program card 8 is formed so that the potential of the terminal connected to the terminal _m7 is "0" and the potential of the terminal not connected to the terminal _m7 is "1". Therefore, various settings are made by combining the potentials of the terminals _m1 to _m6 , and these combinations will be described below. The terminals m ₁ to _{m 3} are used to set the shooting mode, and the combinations are as follows.

[Table] The terminal _m4 is for detecting the card 8. When it is 1, the card 8 is not inserted, and when it is 0, the card 8 is inserted. The terminal _m5 is for displaying the finder, and when it is 1, it is in the display state, and when it is 0, it is in the non-display state. The terminal _m6 is used to warn that the number of remaining films is less than a predetermined number, and when it is 1, a warning can be given, and when it is 0, no warning is given. The settings are as described above, and various setting operations are performed by various combinations of these settings, and various program cards 8 are prepared according to these settings. Therefore, in order to set the potential of each terminal m ₁ to _{m 6} to “1” or “0”, each terminal m ₁ to _{m 6} has a
VBAT is applied through six parallel-connected resistors (these resistors are referred to as the first pull-up resistor group 13), and the voltage at that time is applied to each part. Therefore, the voltages applied to the terminals m ₁ to _{m 3} are applied to the preset input terminals A, B, and C of the counter 14 with a preset input for mode switching whose output changes in a ring shape.
The voltage to the terminal _m4 is applied to the preset input receiving end of the counter 14 via the inverter 15, and the voltage to the terminal m5 is output as the signal DIO, and the voltage to the terminal _m5 is outputted as the signal DIO.
The voltage on m ₆ is applied to the first input of AND gate 17 via inverter 16 . 18 is a first switch group consisting of the switches S ₁ to _{S 5} , the movable contacts of each switch S ₁ to _{S 5} are collectively grounded, and includes the fixed contacts a and c of the changeover switch S ₂ . VBAT is applied to the fixed contacts of each switch _S1 to _S5 through six parallel-connected resistors (these resistors are called the second pull-up resistor group 19), and the current A voltage is applied to each part according to the switch operation. Therefore, the voltage applied to the fixed contact of the switch S ₁ is applied to the first input terminal of the NOR gate 20, and the voltage applied to the fixed contacts a and c of the switch S ₁ is applied via the first and second input terminals of the AND gate 21. The voltage applied to the first input terminal of the NOR gate 22 and further to the fixed contact C is applied to the input terminal U/D for up/down determination of the counter 23 with preset input for exposure setting value.
It is now being added to Also, switch
The voltage to the fixed contact of switch S ₃ is applied to the first input of NOR gate 24, the voltage to the fixed contact of switch S ₄ is applied to the first input of NOR gate 25, and the voltage to the fixed contact of switch S ₅ is applied to the first input of NOR gate 25. are applied to the first input terminal of the NAND gate 27 and the first input terminal of the OR gate 28 via the inverter 26, respectively. Reference numeral 29 denotes a second switch group consisting of the switches S ₆ to _{S 8} . The movable contacts of each switch S ₆ to _{S 8} are collectively grounded, and each switch S ₆
~VBAT is applied to the fixed contact of _S8 through three parallel-connected resistors (these resistors are called the third pull-up resistor group 30), and the voltage is applied to the fixed contact of S8 depending on the switch operation at that time. voltage is applied to each part. Therefore, the voltage applied to the fixed contact of the switch S ₆ is applied to the first input terminal of the NAND gate 31, and the voltage applied to the fixed contact of the switch S ₇ is applied to the trigger terminal T of the film counter 33 via the inverter 32. It's becoming like that. Further, the voltage applied to the fixed contact of switch S ₈ is applied to the second input terminal of OR gate 28 and is also applied to the first input terminal of NAND gate 35 via inverter 34 . Said switch
The voltage to _S6 is output as an A/M signal. The base of the transistor Tr ₁ of the constant voltage circuit 11 is connected to the connection point between the fixed contact of the switch S ₈ and the inverter 34 via a resistor R ₂ . 36 is a power-up clear circuit that generates a clear pulse when the power supply E is turned on. This clear circuit 36 consists of a resistor _R3 and a capacitor _C1 connected in series, a transistor _Tr2 whose base is connected between these, and this transistor. It consists of a transistor Tr ₃ having a collector resistor _{R 5 whose} base is connected between Tr 2 and a resistor R ₄ . A voltage corresponding to the switching operation of the transistor Tr ₃ is applied to the second input terminal of the NAND gate 31 and at the same time is applied via the inverter 37 to the preset input receiving terminal L of the set value counter 23 and the counter 39 with preset input for film sensitivity. Further, through an OR gate 46, a counter 38 for setting the number of film sheets and a counter 3 are added.
It is added to the reset end R of No.3. or gate 46
A switch _S12 which is turned off when the back cover is opened is connected to the switch _S12 , and when the switch S12 is turned off, VBAT is applied to the reset terminals of the counters 33 and 38 via the resistor _R11 or gate 46. The pulse generating circuit 40 includes a NAND gate 27, an inverter 41 connected to the output terminal of the gate 27, a capacitor C2 and a resistor _R6 connected in series between the output terminal of the inverter 41 and the second input terminal of the NAND gate 27. , and a resistor R ₇ connected between these connection points and the input end of the inverter 41. The output from the inverter 41 as the output of this pulse generating circuit 40 is connected to the NOR gates 20, 22, 24, 25. The outputs of the NOR gates 20, 22, 24, and 25 are applied to the trigger terminals of the counters 14, 23, 41, and 38, respectively. VBAT is applied to preset input terminals A and D of the counter 23, and input terminals C and D are grounded, setting the initial state of the counter 23 to "1, 0, 0, 1". The output of this counter 23 changes in a ring shape.
The set value is determined according to the output of this counter 23, and the combination of the output of this counter 23 and the set value is, for example, as follows. However, in the table below, the initial state of the counter 23 is "0, 0, 0,
0'' and TV and AV are the number of pulses added to the counter 23.

【table】

[Table] As above, the counter 23
If the initial state of is “1, 0, 0, 1”, then 1/
It is set to 500 seconds or F22.0, and when one pulse is generated, it becomes 1/1000 second or F32.0 when working as an up counter, and 1/250 second or F16 when working as a down counter. .0. The preset input terminals A and C of the counter 39 have
VBAT is applied, and input terminals B and D are grounded to set the initial state of the counter 39 to "1, 0, 1, 0". This counter 39 changes in a ring shape, and the film sensitivity is set according to the output of this counter 39. For example, the combination of the output of the counter 39 and the film sensitivity is as follows. However, the table below assumes that the initial state of the counter 39 is "0, 0, 0, 0",
SV is the number of pulses added to the counter 39.

【table】

[Table] As above, when the initial state of the counter 39 is "1, 0, 1, 0", it is set to ASA100, and when one pulse is generated, it becomes ASA200. The output of the NAND gate 31 is applied to the reset terminal R of the counter 14. Signals from output terminals a, b, and c of the mode switching counter 14 are outputs corresponding to the voltages applied to the terminals m ₁ , m ₂ , and m ₃ , and these outputs are sent to the external display circuit 43 via the decoder driver 42 . and the input terminals A, B, C of the decoder 44
has been added to. Signals from output terminals a, b, c, and d of the exposure value setting counter 23 are applied to input terminals A, B, C, and D of an up-down counter 47 with a preset input for shifting the exposure setting value, and are also applied to the decoder driver 42. Display circuit 43 via
added to. The decoder driver 42 and display circuit 43 are formed using known techniques and other means. The signals from the output terminals a, b, c, and d of the film sensitivity counter 39 are SV ₁ , SV ₂ , SV ₃ C,
It is output as an SV ₄ signal and is applied to the display circuit 43 via the decoder driver 42 .
Signals from output terminals a, b, c, d, e, f of a film number setting counter 38 whose output can be changed in a ring shape are applied to a display circuit 43 via a decoder driver 42 and a magnitude comparator 48. added to. In this comparator 48, signals applied to input terminals A ₁ , A ₂ , A ₃ , A ₄ , A ₅ , A ₆ are applied to input terminals B ₁ , B ₂ , B ₃ , B ₄ , B ₅ , B _{6 .} An output of "1" from the output terminal when the signal is larger than the signal is applied to the second input terminal of the AND gate 17. Output terminals a, b, c, d of the film counting counter 33 whose output can be varied in a ring shape;
The signals from e and f are applied to an external display circuit 43 via a decoder driver 42 and to input terminals A ₁ , A ₂ , A ₃ , A ₄ , A ₅ , and A ₆ of an adder 49. V _BAT is applied to input terminals B ₁ , B ₂ , B ₃ of this adder 49, and input terminals B ₄ , B ₅ ,
B ₆ is grounded. Signals from the output terminals S ₁ , S ₂ , S ₃ , S ₄ , S ₅ , S ₆ of this adder 49 are input to the input terminals A ₁ , A ₂ , A ₃ , A ₄ , A ₅ , A ₆ of the comparator 45. added to. Reference numeral 50 denotes a pulse generation circuit configured almost similarly to the pulse generation circuit 40, and this pulse generation circuit 50 includes a NAND gate 35 and an inverter 5.
1. It has resistors R ₈ , R ₉ and capacitor C ₃ ,
Since both input ends of the NAND gate 35 are connected to each other, an oscillation pulse is always output.
The output of inverter 51 as the output of pulse generating circuit 50 is applied to first input terminals of AND gates 52 and 56 and to a third input terminal of AND gate 17. The outputs of the AND gates 17 and 56 are applied to the warning sounding element 53 via an OR gate 57. The second input terminal of the AND gate 56 is grounded via the switch _S12 , and the output of the OR gate 58 is added to the third input terminal of the AND gate 56. , the fourth input terminal has a Noah gate 2
Outputs of 0, 22, 24, and 25 are added. Reference numeral 54 denotes an OR gate to which the U _M signal and the D _M signal are applied, and the output of this OR gate 54 is applied to the second input terminal of the AND gate 52 . The output of the AND gate 52 is applied to the trigger terminal T of the counter 47, the output of the OR gate 28 is applied to the preset acceptance terminal L, and the _UM signal is applied to the up/down terminal U/D. This counter a,
Signals SET ₁ , SET ₂ , SET ₃ , and SET ₄ are output from b, c, and d. Output terminal 0 of decoder 44,
From 1, 2, 3, 4: TP, FP, TPM, FPM,
The PRG signal is now output.
Reference numeral 55 denotes an electromagnetic release control circuit consisting of a known one-shot circuit, which causes a pulse current to flow through magnet Mg ₂ when switch S ₉ is turned on, thereby activating the internal mechanism of the camera. R ₁₀ and C ₄ are resistors and capacitors. In FIG. 4, 60 is a photometric circuit, and this photometric circuit 60 includes an operational amplifier 61 and an operational amplifier 61.
A light receiving element 62 connected between the inputs of and a log diode 6 connected between the input and output of the operational amplifier 61.
It consists of 3. The output of the amplifier 61 is passed through the A-D converter circuit 64 to the input terminal A ₁ of the adder circuit 65,
Added to A ₂ , A ₃ , A ₄ , and A ₅ respectively. 66 is a third switch group consisting of the switches N ₁ , N ₂ , N ₃ , and N ₄ , and the movable contact pieces of each switch N ₁ , N ₂ , N ₃ , and N ₄ are collectively grounded; V _CC is applied to the fixed contacts through four resistors connected in parallel (these resistors are referred to as the fourth pull-up resistor group 67), and each switch N ₁ , N ₂ , N A voltage corresponding to the switch operation of ₃ and N ₄ is applied to each part. Therefore, the voltages to the fixed contacts of each switch N ₁ , N ₂ , N ₃ , N ₄ are applied to the input terminals B ₁ , B ₂ , B ₃ , B ₄ of the subtracting circuit 68 and also to the input terminal of the adding circuit 65. B ₁ , B ₂ ,
Added to B ₃ and B ₄ . The outputs from the output terminals S ₁ , S ₂ , S ₃ , S ₄ , S ₅ of this adder circuit 65 are output from the adder circuit 69.
are added to the input terminals A ₁ , A ₂ , A ₃ , A ₄ , A ₅ , respectively, and the input terminals B ₁ , B ₂ , B ₃ , B ₄ of this adder circuit 69
The signals SV ₁ , SV ₂ , SV ₃ , and SV ₄ are respectively added to. The output terminals S ₁ , S ₂ , S ₃ ,
The outputs from S ₄ and S ₅ are input to the subtraction circuit 70 at the input terminal A ₁ ,
A ₂ , A ₃ , A ₄ , A ₅ and this subtraction circuit 70
The input terminals B ₁ , B ₂ , B ₃ , B ₄ have SET1, SET2,
SET3 and SET4 signals are now added. The input end _B5 of the subtraction circuit 70 and the input end _B5 of the addition circuits 65 and 69 are grounded.
71 and 72 are or gates, and this or gate 7
The TP and TPM signals are applied to the first and second input terminals of the OR gate 72, respectively, and the FP and TPM signals are applied to the first and second input terminals of the OR gate 72, respectively.
FPM signals are added to each. 73 is a program switching circuit, and this program switching circuit 73 includes AND gates 74 ₁ to 74
₁₂ , 75 ₁ ~ 75 ₁₂ and or gate 76 ₁ ~ 76
_{4,771 to 774 .} and,
The outputs from the output terminals S ₂ , S ₃ , S ₄ , and S ₅ of the adder circuit 69 are AND gates 74 ₁ and 75 ₁ , 74 ₄ and 7.
5 ₄ , 74 ₇ and 75 ₇ , 74 ₁₀ and 751 ₀ , respectively, and the outputs from the output terminals U ₁ , U ₂ , U ₃ , U ₄ of the subtraction circuit 70 are applied to the AND gates 74 ₂ and 75 ₂ , 74 ₅ and 75 ₅ , 74 ₈
and 75 ₈ , 74 ₁₁ and 75 ₁₁ , and the signals of SET1, SET2, SET3, SET4 are applied to the AND gates 74 ₃ and 75 ₃ , 74 ₆ and 75 ₆ , 74 ₉ and 75 ₉ , 74 ₁₂ and 75 to the first input terminal of ₁₂ . Furthermore, the PRG signal is connected to the AND gates 74 ₁ , 74 ₄ ,
74 ₇ , 74 ₁₀ , 75 ₁ , 75 ₄ , 75 ₇ , 75
₁₀ , and the output of the OR gate 72 is applied to the AND gates 74 ₂ , 74 ₅ , 74 ₈ , 74
₁₁ , 75 ₂ , 75 ₅ , 75 ₈ , 75 ₁₁ , and the output of the OR gate 71 is applied to the AND gates 74 ₃ , 74 ₆ , 74 ₉ , 74 ₁₂ , 75 ₃ ,
It is adapted to be applied to the second input terminals of 75 ₆ , 75 ₉ , and 75 ₁₂ . orgate76 _1,76
The outputs from the AND gates 74 ₁ to 74 ₁₂ are sequentially applied to the first, second, and third input terminals of the AND gates 2 , ₇₆ 3 , and 76 _{4 ,} and similarly, the OR gates 77 ₁ , 77 ₂ , 77 ₃ , 77 ₄ are adapted to receive outputs from AND gates 75 ₁ to 75 ₁₂ . The outputs of the OR gates 77 ₁ to 77 ₄ are applied to the finder display circuit 80 via the decoder driver 79 and are applied to the shutter seconds control circuit 8 via the shutter seconds extension circuit 81.
Added to 2. Also, or gate 76 ₁ ~ ~ 76
The output of ₄ is the magnitude comparator 83,8
4 input terminals A ₁ , A ₂ , A ₃ , A ₄ . The outputs of the OR gates 77 ₁ to 77 ₄ are applied to the finder display circuit 80 via the decoder driver 79, and the input terminals A ₁ , A ₂ , A ₃ ,
Added to A ₄ . Also, or gate 77 ₁ ~ 77
The output of ₄ is the magnitude comparator 85,8
6 input terminals A ₁ , A ₂ , A ₃ , and A ₄ . Input terminal of comparators 83 and 85
V _CC is applied to B ₁ , and input ends B ₂ , B ₃ , and B ₄ are grounded. Input terminal of comparator 84
Vcc is applied to B ₁ , B ₃ , and B ₄ , and input terminal B ₂ is grounded. In addition, the input terminal of the comparator 86
Vcc is applied to B ₂ and B ₄ , and input ends B ₁ and B ₃ are grounded. TP, FP, TPM, FPM, PRG,
The DIO and A/M signals are applied to the finder display circuit 80 via the decoder driver 79. _Mg3
is a shutter control magnet, R ₁₁ and C ₅
are resistors and capacitors, and _S10 is a count switch. 87 ₁ to 87 ₄ are AND gates, and the outputs of the comparators 83 _, 84 , 85 , and 86 are respectively applied to the first input terminals of the AND gates 87 _{1 to} 87 ₄ .
The FPM signal is applied to the _second input terminal of AND gate 87 3 and 87 4, and the FPM signal is applied to the second input terminal of AND gate 87 ₃ and 87 _4.
TPM signals are now added. The output of AND gates 87 ₁ and 87 ₂ is OR gate 8
are added to the first input terminals of 8 ₁ and 88 ₂ , respectively,
The outputs of AND gates 87 ₃ and 87 ₄ are applied to second input terminals of OR gates 88 ₁ and 88 ₂ , respectively. This and gate 87 ₁ ~
87 ₄ and the OR gates 88 ₁ and 88 ₂ form a warning circuit 91 for high warning and low warning. or gate 8
DM and UM signals are output from ₈₁ and ₈₈₂ . The outputs of the comparators 83 and 85 are applied to the finder display circuit 80 via the OR gate ₈₉₁ and the decoder driver 79.
The outputs of 4 and 86 are applied to a finder display circuit 80 via an OR gate ₈₉₂ and a decoder driver 79. Signals from output terminals U ₁ , U ₂ , U ₃ and U ₄ of the subtraction circuit 68 are applied to an aperture control circuit 90 . Mg ₁ is an aperture control magnet, and S ₁₁ is a comb-shaped switch. S ₁₂ is a switch that is linked to the opening and closing of the back cover.
_S13 is a switch that determines whether or not to issue a warning each time the shooting information settings are changed.
_S12 is opened and closed by button 59. Next, the operation of the above configuration will be explained. When the power supply battery E is inserted into the battery box, a voltage V _BAT is applied to each circuit. Therefore, the output of the power up clear circuit 36 becomes "0" at that moment and a clear pulse is generated. This pulse causes the output of the NAND gate 31 to become "1" and reset the counter 14, making each output of the counter 14 "0". Further, the clear pulse is applied to the preset input terminals of the counters 23 and 39 via the inverter 37, setting the outputs of the output terminals a, b, c, and d of the counter 23 to "1, 0, 0, 1" and The outputs of output terminals a, b, c, and d of 39 are set to “1, 0,
At the same time, the counters 38, 33 are reset and each output of the counters 38, 33 is set to "0".In this way, the counters 14, 23,
39, 38, and 33 are set to the initial state. In the initial state, the output of the counter 14 is “0, 0,
Since the output of the counter 23 is "1, 0, 0, 1", the setting value (AV=TV) is 9, that is, the shutter speed is 1/500 seconds, and the aperture value is 0. F22. Also, since the output of the counter 39 is "1, 0, 1, 0", the SV is 5, that is, the film sensitivity is 100, and the outputs of the counters 38 and 33 are "0, 0, 0, 0,
0'', the film count setting value and film count value are both 0. Also, the pulse generation circuit 50 outputs an oscillation pulse, and this output is applied to the AND gates 17 and 56. In this state, the card The case where the program card 8 is inserted into the insertion slot 7 will be explained next, but first the case where the program card in the shutter priority mode is used will be explained. When the program card 8 ₁ is inserted into the insertion slot 7, the potentials of the terminals m ₁ to m ₆ of the program card 8 ₁ are set to “0,” respectively.
0, 0, 0, 1, 0'', the potential at the terminal _m4 is applied to the preset input receiving terminal L of the counter 14 via the inverter 15. Therefore, the counter 14 A, B,
C, and trigger terminal T
Mode switching is prohibited as it is impossible to accept signals. The potential at terminal _m5 is applied to the decoder driver 79 as a signal DIO to enable viewfinder display. The potential at terminal m ₆ is applied to AND gate 17 via inverter 16 . Therefore, the output of the comparator 48 is added to the sounding body 53, or the output of the NOR gate 20, 2 is applied to the sound generator 53.
It is designed to operate when outputs 2, 24, and 25 are applied. The potentials of the terminals m ₁ , m ₂ , m ₃ are "0, 0, 0", and these are applied to the input terminals A, B, C of the counter 14 to set the counter 14 to the shutter priority mode. This counter 14
The outputs "0, 0, 0" from the output terminals a, b, and c of are added to the decoder 44 and converted from binary to decimal, and a signal "1" is output as TP only from the output terminal 0 of the decoder 44. . Further, each output "0, 0, 0" of the counter 14 is inputted to an external display 43 via a decoder driver 42, and a TP mode is displayed as shown in FIG. 5, which is visually recognized from a display window 51. To set the film sensitivity, press the operation button ₄₂ while pressing the safety button 6, which turns on the switch _S5 and turns on the switch _S3 . Therefore, a signal of "0" is applied to the first input terminal of the NOR gate 24, and at the same time, a signal of "1" is applied to the pulse generation circuit 40 via the inverter 26.
An oscillation pulse is output from. Since this oscillation pulse is applied to the second input terminal of the NOR gate 24, a signal corresponding to the oscillation pulse is outputted from the NOR gate 24 and added to the counter 39, and the counter 59 is counted up. The signal corresponding to the oscillation pulse from the NOR gate 24 is also applied to the AND gate 56 via the OR gate 58, and the AND gate 56 performs an AND operation, and its output is applied to the sounding body 53 via the OR gate 57.
The sounding body 53 generates a sound every time the counter 39 counts up. In this way, buttons 6 and 4
While pressing 2, the counter 39 counts up while the sound generating unit 53 produces a sound. The output of this counter 39 is displayed on an external display 43 via a decoder driver 42 and viewed through a display window ₅₂ . When this display matches the film sensitivity of the film loaded in the camera, when at least one of the operation buttons ₄₂ and the safety button 6 is released, a signal of "1" is applied to one input terminal of the Noah gate 24. So,
The output of the NOR gate 24 becomes "0" and the counting operation of the counter 39 is stopped. This allows the film sensitivity of the film to be used to be adjusted to the counter 39.
At the same time, it is displayed by the external display circuit 43 and viewed from the display window ₅₃ as shown in FIG. However, if an ASA100 film is used at this time, the initial state of the counter 39 corresponds to ASA100, so the buttons ₄₂ and 6 are not required to be pressed. To set the number of sheets of film, by pressing the operation button ₄₃ while pressing the safety button 6, the switch _S5 is turned on and the switch _S4 is turned on. Therefore, a signal of "0" is applied to the first input terminal of the NOR gate 25, and at the same time, a signal of "1" is applied to the pulse generation circuit 40 via the inverter 26.
An oscillation pulse is output from. Since this oscillation pulse is applied to the second input terminal of the NOR gate 25, a signal corresponding to the oscillation pulse is outputted from the NOR gate 25 and added to the counter 38, and the counter 38 is counted up. The signal corresponding to the oscillation pulse from the NOR gate 25 is also applied to the AND gate 56 via the third gate 58, and the AND gate 56 performs an AND operation, and its output is applied to the sounding body 53 via the OR gate 57.
The sounding body 53 generates a sound every time the counter 38 counts up. In this way, buttons 6 and 4
While pressing ₃ , the counter 38 counts up while the sound generating unit 53 generates a sound. The output of this counter 38 is displayed on an external display 43 via a decoder driver 42 and viewed through a display window ₅₃ . When this display matches the number of films loaded in the camera, when at least one of the operation buttons ₄₃ and the safety button 6 is released, a signal of "1" is applied to one input terminal of the Noah gate 25. Therefore, the output of the NOR gate 25 becomes "0", the counting operation of the counter is stopped, the number of films to be used (for example, 36) is set in the counter 38, and the set number of films is displayed in the external display circuit 43.
is displayed and visually recognized from the display window ₅₃ as shown in FIG. To set the shutter speed value, press the ready button 10 and slide the shift knob 9 upwards or downwards to turn on the switch _S5 and turn on the switch S2 _.
is switched to the contact a side or the contact c side. switch
When S ₅ ' is turned on, the pulse generating circuit 40 applies an oscillation pulse to the NOR gate 22 and also applies a signal of "1" from the OR gate 28 to the L terminal of the counter 47. When the switch _S2 is switched from the contact point b to the a side, a signal of "1" is applied to the U/D terminal of the counter 23, causing the counter 23 to function as an up counter. A signal of "0" is added to the first input terminal to set the output of the AND circuit 21 to "0". The output of this AND circuit 21 is applied to the NOR gate 22, so a signal corresponding to the oscillation pulse is output from the NOR gate 22 and added to the counter 23.
The counter 23 is counted up. Further, when the switch _S2 is switched from the contact point b to the c side, a signal of "0" is applied to the U/D terminal of the counter 23, so that the counter 23 works as a down counter, and the AND circuit By adding a “0” signal to the second input terminal of 21, AND circuit 2
The output of 1 is set as "0". This AND circuit 2
Since the output of 1 is applied to the NOR gate 22, a signal corresponding to the oscillation pulse is outputted from the NOR gate 22 and added to the counter 23, so that the counter 23 counts down. The signal corresponding to the oscillation pulse from the NOR gate 22 is also applied to the AND gate 56 via the OR gate 58, and the AND gate 56 performs an AND operation, and its output is sent to the OR gate 57.
is added to the sounding body 53 via the sounding body 5.
3 is emitted every time the counter 23 counts up or down. While the button 10 is pressed and the knob 9 continues to be slid in this manner, the counter 23 counts up or down while the sound generating unit 53 generates a sound. The output of this counter 23 is the counter 47
At the same time, the signal is displayed on the external display circuit 43 via the decoder driver 42 and viewed through the display window ₅₁ . When the display matches the desired shutter time (for example, 1/250 second), if at least one of the knobs 9 and 10 is released, a signal of "1" is added to one input terminal of the AND circuit 21. Therefore, “1” is returned from AND gate 21.
A signal is applied to the NOR gate 22, and the output of the NOR gate 22 becomes "0" and the counting operation of the counter 23 is stopped. Therefore, the desired shutter time is set in the counter 23, and the set shutter time is displayed by the external display circuit 43 and viewed from the display window 51 as shown in FIG.
The set shutter time is also set in the counter 47 by the output of the counter 23. The counter 33 for film counting is a switch.
Since _S7 is not turned on, it is not counted up and each output remains at the initial state of "0", and the output is displayed on the external display 43 via the decoder driver 42 and displayed on the display window as shown in FIG. 5 Visible from ₃ . Further, the switches _N1 to _N4 are turned on and off, respectively, depending on the open F value of the photographic lens attached. When the release button 3 is pressed, the switch _S8 is turned on and _Vcc is applied from the constant voltage circuit 11 to each circuit. Therefore, the photometric circuit 60 outputs a signal according to the subject brightness, and the photometric circuit 60 outputs a signal according to the subject brightness.
The output of 0 is added to the adder circuit 65 via the A/D conversion circuit 64 as B _VO1 to B _VO5 signals. A _VO1 to A _VO4 signals corresponding to on/off of switches N ₁ to _{N 4} are added to this adder circuit 65 , and the adder circuit 6
5 adds these B _VO1 to B _VO5 signals and A _VO1 to A _VO4 signals, and adds the B _V1 to B _V5 signals to the adder circuit 69 at the next stage. The S _V1 to S _V4 signals of the counter 39 which set the film sensitivity are added to this adder circuit 69, and the adder circuit 69 receives these B _V1 to B _{V5 signals} .
The signal and the S _V1 to B _V4 signals are added to output the E _V1 to _{E V5} signals. This is the output of the counter 47 which has set the _EV1 to _EV5 signals and the shutter time value.
The SET ₁ to SET ₄ signals are subtracted by a subtraction circuit 70, and the subtraction circuit 70 outputs A _V1 as a calculated value.
~A _V4 signal is output. Program switching circuit 7
Since the TP signal from the decoder 44 is applied to 3 through the OR gate 71, the AND gates 74 ₃ , 74 ₆ , 74 ₉ , 74 ₁₂ , 75 ₂ , 7
A signal of "1" is added to 5 ₅ , 75 ₈ , and 75 ₁₁ . Therefore, A _V1 ~A from the subtraction circuit 70
_{The V4} signal is an AND gate 75 ₂ , 75 ₅ , 75 ₈ ,
75 ₁₁ to the or gates _{77 1} to 77 ₄ , and _A
V1 to A _V4 signals are output. Also, the SET ₁ to SET ₄ signals are processed by AND gates 74 ₃ , 74 ₄ , 74 ₉ , 74
₁₂ to the OR gates 76 ₁ to 76 ₄ , and the _TV1 to _TV4 signals are output from the OR gates 76 ₁ to ₇₆₄ . These T _V1 to _{T V4} signals are inputted to a display circuit 80 via a decoder driver 79 to display the shutter seconds in a viewfinder, and are also applied to a shutter seconds control circuit 82 via a shutter seconds expansion circuit 81. The A _V1 to _{A V4} signals are input to a display circuit 80 via a decoder driver 79, and the aperture value is displayed in the viewfinder. Also, A _V1 ~A
The _V4 signal is applied to subtraction circuit 68. Subtraction circuit 6
At step 8, the A _VO1 -A _VO4 signals are subtracted from the A _V1 -A _V4 signals, and step number aperture value signals ΔA _V1 -ΔA _V4 are added to the aperture control circuit 90. Also, or gate 77 ₁ ~ 77
A _V1 to _{A V4} signals from ₄ are sent to comparators 85 and 8.
6 has been added. The comparator 85 outputs a signal of "1" when the outputs of the OR gates 77 ₁ to 77 ₄ are smaller than their set values. This output is applied to the decoder driver 79 via an OR gate ₈₉₁ , and a display circuit 80 issues an under warning with an arrow. That is, a warning is given when the exposure calculation results in a need for an aperture larger than the maximum aperture of the lens. Therefore, when this warning display appears, the shutter speed is reset to the long time side by operating the button 10 and knob 9 until the warning disappears. The comparator 86 outputs a signal of "1" when the outputs of the OR gates 77 ₁ to 77 ₄ are larger than their set values. This output is applied to the decoder driver 79 via the OR gate ₈₉₂ , and displays an over warning on the display circuit 80 with an arrow. That is, a warning is given when the exposure calculation results in a need for a diaphragm with an aperture smaller than the minimum aperture diaphragm of the lens.
Therefore, when this warning display appears, the shutter speed is reset to a shorter time by operating the button 10 and knob 9 until the warning disappears. Also, the TP signal is the decoder driver 79
The signal is applied to the display circuit 80 via the shutter mode to indicate that the shutter priority mode is in effect. Then, when the release button 3 is further pressed, the switch _S9 is turned on. Therefore, the electromagnetic release control circuit 55
is activated, a pulse current is supplied to the release magnet Mg ₂ , and the magnet Mg ₂ is excited. Therefore, the magnetic force of the permanent magnet and the magnetic force of the electromagnet cancel each other out, and the first tension lever 113 is rotated clockwise by the spring 113c, and the release lever 114 is rotated counterclockwise against the spring 114f. let
As a result, the release lever 114 rotates counterclockwise to rotate the locking lever 116 counterclockwise to release the engagement with the sector gear 118.
At the same time, the holding lever 150 is rotated counterclockwise to release the engagement with the suction lever 130. Therefore, the sector gear 118 is rotated clockwise by the spring pressure of the spring 103a of the aperture preset ring 103, which is transmitted through the arm 103c, the signal lever 129, and the pin 118. For this reason, the speed regulating mechanism 11
Gears 119a, 119b, 11 forming 9
9c rotates, and the last stage stop wheel is rotated counterclockwise. At the same time, the comb-like switch S ₁₁
The slider 118b of this switch S ₁₁ is slid.
The pulses generated by this are applied to the aperture control circuit 90. Therefore, in the aperture control circuit 90, the switch
The number of pulses generated by _S11 and the outputs ΔA _V1 to ΔA _V4 of the subtraction circuit 68 are compared, and when the difference reaches a predetermined value, the energization to the diaphragm control magnet Mg ₁ is cut off. As a result, the iron piece 131 is not attracted, and the suction lever 130 is rotated counterclockwise by the spring 131a, and its bent portion engages with the stop wheel 119c.
Stop the rotation of c. As a result, sector gear 11
When the rotation of 8 is stopped, the aperture preset ring 1
03 also stops rotating, and the position of the bell crank is determined accordingly. That is, the stop position of the aperture presetting ring 103 is determined in accordance with the aperture value determined by information from the light receiving element 62 and photographic information such as the set shutter speed and film sensitivity. At the same time, the automatic aperture mechanism and mirror drive mechanism also operate. That is, when the release lever 114 is rotated counterclockwise, the mirror drive engagement lever 115 is rotated clockwise and is disengaged from the mirror drive lever 111. Therefore, the mirror drive lever 111 is rotated counterclockwise by the spring 111d. At this time, the claw portion 111b of the mirror drive lever 111 and the tension lever 136 are in a locked state, so the push-up lever 137 that pivotally supports the tension lever 136 rotates counterclockwise. This rotation of the lever 137 causes the automatic aperture drive lever 105 to rotate clockwise. This automatic aperture drive lever 105 narrows down the aperture according to the preset position of the bell crank via a pin 104. Also, by rotating the push-up lever 137 counterclockwise, the flip-up pin 138a of the mirror 138 is pushed up, and the mirror 138 is lifted up.
Perform a hopping. A delay device (not shown) operates together with this flip-up operation of the mirror 138, and after a delay time of the delay device, the front curtain lever 133 is rotated clockwise by the mirror drive lever 111. The delay time provided by this delay device is for starting the shutter after the time has elapsed from the maximum aperture to the minimum aperture. For this reason, the front curtain gear 134
begins to rotate and causes the leading curtain to travel via the leading curtain pinion 135. As the leading curtain runs, the count switch _S10 is turned off in a known manner. For this reason, the shutter control circuit 82 applies a pulse to the shutter control magnet Mg ₃ after a time determined according to the set shutter time. Therefore, the magnetic force of the permanent magnet and the magnetic force of the electromagnet cancel each other out, and the magnet Mg ₃ loses its attractive force. As a result, the lock on the trailing gear 139 by the suction lever 140 is released, so the trailing gear 139 begins to rotate and causes the trailing curtain to travel via the trailing pinion 139'. Further, since the film count switch _S7 is turned on by the rotation of the rear curtain gear 139, a signal of "1" is applied to the trigger terminal T to the counter 33 via the inverter 32. Therefore, the counter 33 is incremented by one, and the output of the counter 33 is applied to an external display circuit 43 via a decoder driver 42 to display the film count value, which can be viewed through the display window ₅₃ . At the same time, the output of the counter 33 is applied to the input terminals A ₁ to _{A 5} of the adder circuit 49. This adder circuit 49 adds the input signals of input terminals A ₁ to A ₅ and B ₁ to B ₅ and applies the added output to the comparator 48 . The comparator 48 compares the output of the counter 38 and the output of the adder circuit 49, and
If the output of
A signal is output to the AND gate 17. Assume that a signal corresponding to, for example, seven films is applied to the input terminal of the adder circuit 49. Then, at the end of rotation of the trailing gear 139, the pin 139a of the trailing gear 139 rotates the trailing signal lever 141 counterclockwise to rotate the mirror tensioning lever 136 clockwise. By rotating this mirror tensioning lever 136, the mirror drive lever 11
Release the engagement with 1. For this reason, the push-up lever 137 is moved by the spring 105a to the automatic aperture lever 10.
5, and the mirror 138 is returned to its original position by a return spring 138c. At the same time, the automatic aperture lever 105 is rotated counterclockwise by the spring 105a, and the planted pin 104 of the aperture drive ring is rotated counterclockwise by the spring 105a.
is restored and the diaphragm returns to its original open state. Then, by hoisting the hoisting lever 1, the hoisting shaft 1
When 08 is rotated, film winding and shutter charging are performed, and the intermediate lever 1
The charge lever 112 is charged via the levers 10 and 107, and the automatic diaphragm mechanism and mirror mechanism are also charged, and the portions disengaged by the release operation are reengaged and returned to the state shown in the drawing. This completes one cycle of photography in the shutter priority mode. Next, a case will be described in which a program card in the aperture priority mode is used, but a description of parts that operate in the same way as in the shutter priority mode will be omitted. When the program card ₈₂ is inserted into the insertion slot 7, this program card ₈₂ connects each terminal _m1 to _m6.
The potentials are set to be "1, 0, 0, 0, 1, 0", respectively. The potentials of terminals m ₄ to _{m 6} act on each part in the same way as in the case of shutter priority.
The potentials of the terminals m ₁ , m ₂ , m ₃ are "1, 0, 0", and these are applied to the input terminals A, B, C of the counter 14 to set the counter 14 to the aperture priority mode. The outputs "1, 0, 0" of the output terminals a, b, c of the counter 14 are applied to the decoder 44 and converted from binary to decimal.
A signal of "1" is outputted as FP only from output terminal 1 of. In addition, each output of the counter 14 is “1,
0, 0'' is input to the external display circuit 43 via the decoder driver 42, and the FP mode is displayed as shown in _FIG . Setting operations are performed in the same way as in the shutter priority mode, and the film sensitivity (e.g.
ASA100) and the number of film sheets (for example, 36) are visible from the display windows ₅₂ and ₅₃ as shown in Fig. 5.The aperture value is set in the same way as the shutter speed setting in the shutter priority mode. It can be done. In this case, the output of the counter 23 is the same as in the shutter priority mode, but the output terminal a of the counter 14 is
Since the signal "1" from the aperture is applied to the decoder driver 42, the decoder driver 42 is switched to be able to display the aperture value. Therefore, the output of the counter 14 is applied to the counter 47 and displayed on the external display circuit 43 via the decoder driver 42, so that the desired aperture value (for example, F16) can be visually recognized from the display window ₅₁ as shown in FIG. . The state of the film count counter 33 and the states of the switches _N1 to _N4 are the same as in the shutter priority case. Then, when the release button 3 is pressed, photometry calculation and display are performed in the same way as in the case of shutter priority, but the calculation circuit 70 outputs the EV ₁ to EV ₅ signals and the output of the counter 47 which has set the aperture value.
Subtraction with the SET ₁ to SET ₄ signals is performed, and the subtraction circuit 70 outputs the TV ₁ to _{TV 4} signals as calculated values. The program switching circuit 73 has a decoder 4
Since the FP signal from 4 is applied via the OR gate 72, the AND gates 74 ₂ , 74 ₅ ,
74 ₈ , 74 ₁₁ , 75 ₃ , 75 ₆ , 75 ₉ , 75
A signal “1” is added to ₁₂ . Therefore, the TV ₁ to TV ₄ signals from the subtraction circuit 70 are applied to the OR gates 76 1 to 76 ₄ via the AND gates 74 ₂ , 74 ₅ , 74 ₈ , and 74 ₁₁ , and the TV ₁ signals from the OR gates 76 ₁ to 76 4 are applied to the OR gates 76 ₁ to 76 ₄ . ~TV ₄ signals are output. Also, the SET ₁ to SET ₄ signals are connected to the AND gate 75.
₃ , 75 ₆ , 75 ₉ , 75 ₁₂ to the OR gates 77 ₁ to _{77 4} , and these OR gates 7
AV ₁ to AV ₄ signals are output from 7 ₁ to 77 ₄ .
These AV ₁ to _{AV 4} signals are input to a display circuit 80 via a decoder driver 79, and the aperture value is displayed in the viewfinder. In addition, the AV ₁ to AV ₄ signals are sent to the subtraction circuit 68.
The subtraction circuit 68 subtracts the A _VO1 to A _VO4 signals from the AV ₁ to AV ₄ signals to obtain the stage number aperture value signal △
Add AV ₁ to △AV ₄ to the aperture control circuit. TV ₁ ～
The TV ₄ signal is input to a display circuit 80 via a decoder driver 79 to display the shutter seconds in a viewfinder, and is also applied to a shutter seconds control circuit 82 via a shutter seconds expansion circuit 81. Furthermore, the TV ₁ to _{TV 4} signals from the OR gates 76 ₁ to 76 ₄ are applied to comparators 83 and 84.
The comparator 83 outputs a signal of "1" when the outputs of the OR gates 76 ₁ to 76 ₄ are smaller than their set values. This output is applied to the decoder driver 79 via the OR gate ₈₉₁ and is applied to the display circuit 80.
An under warning is given with an arrow. That is,
A warning is given if the exposure calculation results in a shutter time longer than the maximum shutter time of the camera. Therefore, when this warning display appears, the aperture value is reset to the maximum aperture side by operating the button 10 and knob 9 until the display disappears. The comparator 84 outputs a signal of "1" when the outputs of the OR gates 76 ₁ to 76 ₄ are larger than their set values. This output is applied to the decoder driver 79 via the OR gate ₈₉₂ , and an over warning is given to the display circuit 80 with an arrow. That is, a warning is given if the exposure calculation results in a shutter speed faster than the maximum shutter speed of the camera. Therefore,
When this warning display appears, the user operates the button 10 and knob 9 until the display disappears to reset the aperture value to a smaller aperture. Also, the FP signal is the decoder driver 7
9 to the display circuit 80 to display the aperture priority mode in the viewfinder. When the release button 3 is further pressed, the camera is released and the aperture preset control operation is performed in the same manner as in the shutter priority mode. Therefore, the stop position of the aperture preset ring 103 is determined, and this stop position of the aperture preset ring 103 is determined in accordance with the preset aperture value. At the same time, the automatic aperture mechanism and mirror drive mechanism operate in the same manner as in the shutter priority mode. Then, the leading curtain runs in the same manner as in the shutter priority mode. The count switch is activated by a known method due to the running of this first curtain.
_S10 is turned off. For this reason, the shutter control circuit 8
2 applies a pulse to the shutter control magnet Mg ₃ after a time determined according to the shutter speed obtained as a result of calculation. That is, the shutter speed obtained as a result of the calculation is determined by information from the light receiving element 62 and photographing information such as the set aperture value and film sensitivity. After the magnet Mg ₃ is energized, the trailing curtain travels in the same manner as in the shutter priority mode, a film count is performed, and the mirror and aperture are restored. The hoisting operation will be performed in the same manner as in the case of shutter priority. Next, a case will be described in which a program card in the shutter priority magic mode is used, but a description of parts that operate in the same manner as in the shutter priority mode will be omitted. When the program card ₈₃ is inserted into the insertion slot 7, this program card ₈₃ connects each terminal _m1 to _m6.
The potentials are set to be "0, 1, 0, 0, 1, 0", respectively. The potentials of terminals m ₄ to _{m 6} act on each part in the same way as in the case of shutter priority.
The potentials at terminals m ₁ , m ₂ , and m ₃ are "0, 1, 0", and these are applied to input terminals A, B, and C of the counter 14 to set the counter 14 to the shutter priority magic mode. The outputs "0, 1, 0" of the output terminals a, b, c of this counter 14 are outputted to the decoder 44.
, the binary signal is converted into a decimal signal, and a “1” signal is output from only the output terminal 2 of the decoder 44 as TPM. Also counter 1
The respective outputs "0, 1, 0" of 4 are input to an external display circuit 43 via a decoder driver 42, and a mode called TPM is displayed as shown in FIG. 5, which is visually recognized from a display window ₅₁ . The shutter speed setting, film sensitivity setting, and film number setting operations are performed in the same manner as in the shutter priority mode, and the shutter speed setting (e.g. 1/250 seconds) and film sensitivity (e.g.
ASA100) and the number of films (for example, 36) can be visually recognized from the display windows 5 ₁ , 5 ₂ , 5 ₃ as shown in FIG. Further, the state of the film count counter 33 and the states of the switches _N1 to _N4 are the same as in the shutter priority mode. When the release button 3 is pressed, each circuit operates in the same manner as in the shutter priority mode. At this time, as a result of the photometric calculation, AV ₁ to AV ₄ signals are obtained from the OR gates 77 ₁ to 77 ₄ , but if these AV ₁ to _{AV 4} signals are smaller than the reference value of the comparator 85, the comparator 85 is set to "1".
The signal becomes OR gate 89 ₁ and AND gate 8
7 Add to ₃ . Therefore, the output of the OR gate ₈₉₁ is applied to the decoder driver 79 and the display circuit 8
An under warning is given with an arrow at 0. Since the TPM signal is applied to the AND gate ₈₇₃ , the AND gate ₈₇₃ performs an AND operation, and its output is outputted as a DM signal via the OR gate ₈₈₁ . This DM signal is not applied to the l/d terminal of the counter 47, making the counter 47 a down counter. The DM signal is applied to AND gate 52 via OR gate 54. This and gate 5
Since the oscillation pulse from the pulse generation circuit 50 is applied to the counter 47, a signal corresponding to the oscillation pulse is applied to the trigger terminal T of the counter 47, and the counter 47 counts down. In other words, the shutter speed is shifted to the long speed side.
This countdown operation is performed while the DM signal is applied. That is, the counter 47 counts down every time a pulse is applied, but the counter 47 always outputs the SET ₁ to SET ₄ signals and performs the calculation as described above, and the OR gates 77 ₁ to 77 ₄ output the AV ₁ to SET 4 signals. The AV ₄ signal is output and the comparator 85 compares it with the reference value AV ₁ ~
Comparing with AV ₄ signal. For this reason, the reference value and
When the AV ₁ to AV ₄ signals match, the comparator 85
Since outputs a signal of "0", the AND gate ₈₁₃ no longer performs an AND operation, the countdown operation of the counter 47 is stopped, and the reset operation of the shutter seconds value is completed. At the same time comparator 8
Since the signal changing from 5 to "1" is no longer applied to the OR gate ₈₉₁ , the warning display on the display circuit 80 is no longer displayed, and it can be confirmed that the reset of the shutter time has been completed. Furthermore, when the AV ₁ to AV ₄ signals are larger than the reference value of the comparator 86, the comparator 86 sends a signal of "1" to the OR gate 8.
Add to 9 ₂ and AND gate 87 ₄ . Therefore, the output of the OR gate ₈₉₂ is the decoder driver 7
9 to issue an over warning on the display circuit 80 with an arrow. Since the TPM signal is applied to the AND gate _87-4 , the AND gate _87-4 can perform an AND operation, and its output is passed through the OR gate _88-2 .
Output as UM signal. This UM signal is added to the u/d terminal of the counter 47 and
is the up counter, and the or gate 5
4 to AND gate 52. Since the oscillation pulse from the pulse generation circuit 50 is applied to the AND gate 52, the counter 47
A signal corresponding to the oscillation pulse is applied to the trigger terminal T of the trigger terminal T, and the counter 47 is counted up. In other words, the shutter speed is shifted to the high speed speed side. This countdown operation
This is done while the DM signal is applied. That is, the counter 47 is counted up every time a pulse is added, but the counter 47 always outputs the SET ₁ to SET ₄ signals and the calculations are performed as described above, and the OR gates 77 ₁ to 77 _{4 output the SET 1 to SET 4} signals.
The AV ₁ to AV ₄ signals are output, and a comparator 86 compares the reference value with the AV ₁ to AV ₄ signals. Therefore, when the reference value and the AV ₁ to AV ₄ signals match, the comparator 86 outputs a signal of "0", so the AND gate ₈₇₄ cannot perform an AND operation, and the count-up operation of the counter 47 is stopped. The shutter seconds value resetting operation ends. At the same time, since the signal "1" from the comparator 86 is no longer applied to the OR gate ₈₉₂ , the warning display on the display circuit 80 is no longer displayed, and it can be confirmed that the reset of the shutter time has been completed. Since these reset shutter seconds are always output from the counter 47 as the SET ₁ to SET ₄ signals, they are displayed in the finder by the display circuit 80 in the same manner as in the case of shutter priority. When the release button 3 is further pressed, the camera is released and the aperture preset control operation is performed in the same manner as in the shutter priority mode, and at the same time, the automatic aperture mechanism and mirror drive mechanism are also activated. Shutter control is performed in the same manner as in the shutter priority mode, and then the mirror and aperture are restored. The winding operation is performed in exactly the same way as in the case of shutter priority. In this way, the shutter priority magic mode determines the aperture value according to the set shutter speed and shooting information, and if this aperture value exceeds the maximum or minimum aperture of the lens, the aperture is set to the maximum or minimum aperture of the lens. Based on this, the preset shutter speed can be reset to obtain proper exposure. Next, a case will be explained in which a program card for the aperture priority magic mode is used, but a description of parts that operate in the same way as in the aperture priority mode will be omitted. When the program card ₈₄ is inserted into the insertion slot 7, the program card ₈₄ connects each terminal _m1 to _m6.
The potentials are set to be "1, 1, 0, 0, 1, 0", respectively. The potentials of terminals m ₄ to _{m 6} act on each part in the same way as in the case of aperture priority. terminal
The potentials of m ₁ , m ₂ , and m ₃ are "1, 1, 0", and these are applied to input terminals A, B, and C of the counter 14 to set the counter 14 to the aperture priority magic mode. The outputs "1, 1, 0" of the output terminals a, b, c of the counter 14 are applied to the decoder 44, where they are converted from binary to decimal.
A signal of "1" is output as FPM only from the output terminal 3 of 4. Further, each output "1, 1, 0" of the counter 14 is inputted to an external display 43 via a decoder driver 42 as shown in FIG.
A mode called FPM is displayed and visually recognized from the display window ₅₁ . The aperture value setting, film sensitivity setting, and film number setting operations are performed in the same way as in the aperture priority mode.
The number of films (for example, 36) is displayed in the display window 5 ₁ , 5
₂ and 5 ₃ as shown in FIG. Further, the state of the film counting counter 33 and the states of the switches _N1 to _N4 are the same as in the aperture priority mode. When the release button 3 is pressed, each circuit operates in the same manner as in the aperture priority mode. At this time, as a result of photometric calculation, OR gate 76
TV ₁ -TV ₄ signals are obtained from ₁ - 76 _4. If the TV ₁ - _{TV 4} signals are smaller than the reference value of the comparator 83, the comparator 83 sends a signal of "1" to the OR gate 89 ₁ and the AND gate 87 ₁ . Add to. For this reason, the output of the OR gate ₈₉₁ is applied to the decoder driver 79, and an under warning is given to the display circuit 80 by an arrow. and gate 87 ₁
Since the FPM signal is added to , the AND gate ₈₇₁ performs an AND operation, and its output is outputted as a DM signal via the OR gate ₈₈₁ . This DM signal is not applied to the u/d terminal of the counter 47, making the counter 47 a down counter. The DM signal is applied to AND gate 52 via OR gate 54. Since the oscillation pulse from the pulse generation circuit 50 is applied to the AND gate 52, a signal corresponding to the oscillation pulse is applied to the trigger terminal T of the counter 47, and the counter 47 counts down. That is,
The aperture value will be shifted to the maximum aperture side. This countdown operation takes place while the DM signal is applied. That is, the counter 47
is counted down every time a pulse is added, but the counter 47 always reads SET ₁ to SET ₄ .
The signals are output and the calculations are performed as described above, and the OR gates 76 ₁ to 76 ₄ output the TV ₁ to TV ₄ signals, and the comparator 83 converts the reference value and TV ₁ to TV 4 signals.
Comparing with TV ₄ signal. Therefore, the reference value and
When the TV ₁ to TV ₄ signals match, comparator 8
3 outputs a signal of "0", AND gate 81 ₁ cannot be ANDed, and counter 47
The countdown operation is stopped, and the aperture value resetting operation is completed. At the same time, since the signal "1" from the comparator 83 is no longer applied to the OR gate 891, the warning display on the display circuit ₈₀ is no longer displayed, and it can be confirmed that the resetting of the aperture value has been completed. Moreover, if the TV ₁ to TV ₄ signals are larger than the reference value of the comparator 84, the comparator 8
4 applies a signal of "1" to the OR gate ₈₉₂ and the AND gate ₈₇₂ . For this reason, or gate 8
The output of ₉₂ is applied to the decoder driver 79 and displays an over warning on the display circuit 80 with an arrow. Since the FPM signal is applied to the AND gate ₈₇₂ , the AND gate ₈₇₂ performs the AND operation, and its output is outputted as the UM signal via the OR gate ₈₈₂ . This UM signal is applied to the u/d terminal of the counter 47 to make the counter 47 an up counter, and is applied to the AND gate 52 via the OR gate 54. Since the oscillation pulse from the pulse generation circuit 50 is applied to this AND gate 52, a signal corresponding to the oscillation pulse is applied to the trigger terminal T of the counter 47.
The counter 47 is counted up. In other words, the aperture value is shifted toward the minimum aperture. This countdown operation is performed while the DM signal is being applied. That is, the counter 47 is counted up every time a pulse is added, but the counter 47 always outputs SET _1.
The ~SET ₄ signal is output, the calculation is performed as described above, and the OR gates 76 ₁ ~ 76 ₄ output TV ₁ ~ _{TV 4.}
A signal is output and a comparator 84 compares the reference value with the TV ₁ to _{TV 4} signals. Therefore, when the reference value and the TV ₁ to _{TV 4} signals match, the comparator 84 outputs a signal of "0", so the AND gate ₈₉₂ cannot perform an AND operation, and the count-up operation of the counter 47 is stopped. The aperture value reset operation ends. At the same time, a signal of "1" from the comparator 84 is output to the OR gate 8.
₉₂ , the warning display on the display circuit 80 is no longer displayed, and it can be confirmed that the resetting of the aperture value has been completed. These reset aperture values are always sent from the counter 47 to SET ₁ ~
Since it is output as the SET ₄ signal, it is displayed in the viewfinder by the display circuit 80 in the same way as in the case of aperture priority. When the release button 3 is further pressed, the camera is released in the same manner as in the aperture priority mode, and the aperture preset control operation is performed, and at the same time, the automatic aperture mechanism and mirror drive mechanism are also activated. Then, shutter control is performed in the same manner as in the aperture priority mode, and then the mirror and aperture are restored. The winding operation is performed in exactly the same way as in the case of shutter priority. In this way, the aperture priority magic mode determines the shutter speed value according to the set shutter speed and shooting information, and if this shutter speed value exceeds the camera's fastest shutter speed or slowest shutter speed, In addition, a preset aperture value is reset based on the camera's fastest shutter speed or slowest shutter speed to obtain proper exposure. Next, a case will be described in which a program card in the program photography mode is used, but a description of parts that operate in the same way as in the shutter priority mode will be omitted. When the program card ₈₅ is inserted into the insertion slot 7, this program card ₈₅ connects each terminal _m1 to _m6.
The potentials are set to be "0, 0, 1, 0, 1, 0", respectively. The potentials of terminals m ₄ to _{m 6} act on each part in the same way as in the case of shutter priority.
The potentials of the terminals m ₁ , m ₂ , m ₃ are "0, 0, 1", and these are applied to the input terminals A, B, C of the counter 14 to set the counter 14 to the program photography mode. Output terminals a, b of this counter 14,
The output “0, 0, 1” of c is applied to the decoder 44 and converted from binary to decimal, and a signal “1” is output only from the output terminal 4 of the decoder 44.
Output as PRG. Further, each output "0, 0, 1" of the counter 14 is inputted to an external display circuit 43 via a decoder driver 42, and a mode display called PRG is performed as shown in _FIG .
Visible from. The film sensitivity setting operation and the film number setting operation are performed in the same manner as in the shutter priority mode, and the film sensitivity (for example,
ASA100) and the number of films (for example, 36) are visually recognized from the display windows ₅₂ and ₅₃ as shown in FIG.
Since the shutter speed or aperture value is set in program photography, it is not necessary to manipulate the shutter speed or aperture value, and even if the set value is manipulated, it does not affect the exposure calculation. The state of the film count counter 33 and the states of the switches _N1 to _N4 are the same as in the shutter priority case. Then, when _the release button ₃ is pressed, the photometry operation _is performed in the same manner as in the case _of shutter priority, but the PRG signals _are
4 ,75 ₇ ,75 Since it is added to ₁₀ , SET ₁
~SET ₄ signal and the output of the subtraction circuit 70 are not taken out from the program switching circuit 73, but are sent to the addition circuit 6.
The output from 9 is taken out from the program switching circuit 73. That is, the output of the adder circuit 69 is shifted by one bit and taken out as AV=AV=1/2EV. The signals from the output terminals S ₂ to _{S 4} of the adder circuit 69 are connected to AND gates 74 ₁ , 74 ₄ , 74 ₇ ,
In addition to the gates 74 ₁₀ and 75 ₁ , 75 ₄ , 75 ₇ , 75 ₁₀ , AND gates 74 ₁ , 74 ₄ , 74
The outputs of _AND gates 75 1 , 74 ₁₀ are taken out as TV ₁ to TV ₄ signals through OR gates 76 _{1 to 76 4, and the outputs of AND gates 75 1 , 75 4} , 75 ₇ , 75 ₁₀ are taken out through OR gates 77 ₁ to 77 _4. It is extracted as AV ₁ to _{AV 4} signals. The AV ₁ to AV ₄ signals outputted from the OR gates 77 ₁ to 77 ₄ are input to the display circuit 80 via the decoder driver 79 to display the aperture value in the viewfinder. In addition, the AV ₁ to AV ₄ signals are sent to the subtraction circuit 68.
The subtraction circuit 68 subtracts the AV ₀₁ to AV ₀₄ signals from the AV ₁ to _{AV 4} signals to obtain the stage number aperture value signal △
Add AV ₁ to △AV ₄ to the aperture control circuit. The TV ₁ to TV ₄ signals output from the OR gates 76 ₁ to 76 ₄ are sent to the display circuit 80 via the decoder driver 79.
The shutter seconds are input to the shutter seconds and displayed in the finder, and are also applied to the shutter seconds control circuit 82 via the shutter seconds expansion circuit 81. Also,
The PRG signal is applied to the display circuit 80 via the decoder driver 79, and the program photography mode is displayed in the viewfinder. When the release button 3 is further pressed, the camera is released and the aperture preset control operation is performed in the same manner as in the shutter priority mode. Therefore, the stop position of the aperture preset ring 103 is determined, and the stop position of the aperture preset ring 103 is determined in accordance with the aperture value obtained as a result of calculation. At the same time, the automatic aperture mechanism and mirror drive mechanism operate in the same manner as in the shutter priority mode. Then, the leading curtain runs in the same manner as in the shutter priority mode. By running this first curtain, the count switch S ₁₀ is set in a known manner.
is turned off. This shutter control circuit 82 applies a pulse to the shutter control magnet Mg ₃ after a time determined according to the shutter time obtained as a result of calculation. After the magnet Mg ₃ is energized, the trailing curtain travels in the same manner as in the shutter priority mode, the film is counted, and the mirror and aperture are restored. The hoisting operation will be performed in the same manner as in the case of shutter priority. Shooting is repeated by selecting the various shooting modes as described above by exchanging cards, and when 30 shots have been taken, the counter 33 outputs a signal equivalent to 30 pulses, which is added to the adding circuit 49. It will be done. Therefore, from the adder circuit 49, the film 37
Since a signal corresponding to the number of sheets is output, the adder circuit 49
The output of is larger than the output of the counter 38,
Comparator 48 applies a signal of "1" to AND gate 17. Therefore, when the switch S ₈ is turned on for the next shooting, the AND gate 17 is cleared by the output of the pulse generating circuit 50 and activates the sounding element 53 to warn that the number of remaining sheets of film is decreasing. It is something to do. Next, a case where the program card 8 is not inserted into the card insertion slot 7 will be explained. In this case, you want to shoot in a shooting mode other than the one fixed by the program card 8 due to a change in shooting conditions, but if you do not have a suitable program card 8, or if you have lost the program card 8 and want to shoot in a shooting mode using the program card 8. If the setting becomes impossible, the photographing mode can be switched using the operation button ₄₁ . That is, remove the program card 8 and release the fixation of the shooting mode.
When the operation button ₄₁ is pressed while the safety button 6 is pressed, the photographing mode changes over time while these buttons are held down. At this time, since the program card 8 is not inserted, the potentials of each terminal _m1 to _m6 are all "1, 1, 1,
1, 1, 1". Therefore, since the potential of the terminal _m4 is "1", the input terminal L of the counter 14 is "0", and the input terminals A, B, C of the counter 14 are
It prohibits the reception of signals to the trigger terminal T, and allows the reception of signals to the trigger terminal T, thereby enabling mode switching. The potential at terminal _m5 is applied to the decoder driver 79 as a signal DIO to enable finder display. Since the potential of terminal _m6 is “1”,
A signal of "0" is applied to the AND gate 17, and the sounding element 53 is rendered inoperable for warning of the number of remaining films. The potentials of terminals m ₁ , m ₂ , m ₃ are “1, 1, 1”, but these are
Since acceptance of the input terminals A, B, and C of is prohibited, the data will not be added to the counter 14. When the safety button 6 and the operation button ₄₁ are pressed down, switch _S5 is turned on and switch _S1 is turned on, a signal of "0" is applied to the first input terminal of the NOR gate 20, and at the same time a pulse is generated via the inverter 26. A signal "1" is applied to the circuit 40, and the pulse generating circuit 40 outputs an oscillation pulse. Since this oscillation pulse is applied to the second input terminal of the NOR gate 20, a signal corresponding to the oscillation pulse is outputted from the NOR gate 20 and added to the counter 14, and the counter 14 is counted up. The signal corresponding to the oscillation pulse from the NOR gate 20 is also applied to the AND gate 56 via the OR gate 58, and the AND gate 56 performs an AND operation and its output is applied to the sounding element 53 via the OR gate 57. 53 generates a sound every time the counter 14 counts up. The output of the counter 14 is “0, 0, 0”, “1, 0, 0”, “0, 1,
0'', ``1, 1, 0'', and ``0, 0, 1'', and various shooting modes can be selected using buttons 6 and 4 _1.
While the key is pressed, the sound source 53 continues to produce sounds while switching. The sequentially changed output of the counter 14 is applied to an external display circuit 43 via a decoder driver 42 and visually recognized through a display window ₅₁ . Then, when the shooting mode matches the desired shooting mode, operation buttons 4 ₁ and safety button 6
When at least one of the presses is released, counter 1
4, a signal corresponding to the oscillation pulse is no longer applied via the NOR gate 20, the count-up of the counter 14 is stopped, and a signal corresponding to the desired shooting mode is output from the counter 14, and the desired shooting mode is set to the camera. is set to The subsequent operations are performed in accordance with the output of the counter 14 in exactly the same manner as in the various photographing modes when the program card 8 described above is inserted. However, no warning is given regarding the number of remaining sheets of film. In all cases above, the aperture preset ring is 10.
This is a case where the AE index of 1 is matched with the fixed index, but the case where the AE index of the aperture preset ring 101 is removed from the fixed index 102 and matched with the desired aperture value will be described next. When the aperture preset ring 101 is set to the desired aperture value, the cam portion 101b comes off from the signal pin 142, so
The switching lever 143 is rotated counterclockwise by the spring 143a and comes into contact with the contact piece 160 to turn on the switch _S6 . At the same time, the interlocking lever 170
0a, it rotates counterclockwise following the rotation of the switching lever 143. For this reason, the locking lever 171
is rotated clockwise by the spring 171a to bring the suction lever 130 into the locked state. In addition, when the switch S ₆ is closed, the NAND gate 31 is set to “0”.
Since the signal "1" is inputted, the NAND gate 31 outputs a signal "1" and is applied to the reset terminal R of the counter 14. Therefore, the counter 14 is set to an initial state, and the shutter priority mode is automatically set regardless of whether or not the card 8 is inserted. That is, the outputs of the output terminals a, b, and c of the counter 14 are "0, 0, 0".
This output is applied to the decoder 44 to convert from binary to decimal, and the output is applied to the decoder 44 to convert from binary to decimal
A signal of "1" is output as TP only from the output terminal O of. In addition, each output of the counter 14 is “0,
0, 0'' is input to the external display 43 via the decoder driver 42, and the mode TP is displayed as shown in FIG. 5, which is visually recognized from the display window ₅₁ . The second time setting operation is performed as explained in the shutter priority mode, and the set value is displayed on the display windows 5 ₁ , 5 ₂
Visible from. When the release button 3 is pressed, photometric calculation is performed as explained in the shutter priority mode. And then release button 3
When is pressed, the aperture preset control operation is performed as explained in the shutter priority mode, and at the same time the automatic aperture mechanism and mirror drive mechanism are also activated.At this time, in the aperture preset control operation,
Since the suction lever 130 is locked to the lock lever 171, the stop wheel 119C cannot be stopped even if the aperture control circuit 90 cuts off the power to the aperture control magnet _Mg1 , and the aperture preset ring 103 cannot be stopped. rotates to the set aperture value and then stops. Therefore, the aperture is determined according to the set aperture value. Thereafter, shutter control is performed as explained in the shutter priority mode, and then the mirror and aperture are restored. The winding operation is performed in exactly the same manner as in the shutter priority mode. When switching from auto to manual in this way, the aperture is controlled according to the set aperture value, and the shutter is controlled according to the set shutter speed. The other operations are exactly the same as those in the shutter priority mode, so a detailed explanation thereof will be omitted. When the back cover of the camera is opened, the switch 12 is turned off when the camera back is opened, such as when taking out the film after rewinding the film after photographing the number of sheets of film, or when loading the film. For this reason V
Since _BAT is applied to the reset terminals of counters 33 and 38 via resistor _R11 and OR gate 46,
The film count setting counter 38 and the film count counter 33 are set to an initial state. Although the above embodiment has been described in which the button 59 is not pressed, there may be cases where it is not desirable to output a warning sound depending on the shooting situation. In this case, when the button 59 is pressed, the switch _S13 is closed and one input terminal of the AND gate 56 is grounded, so that the AND gate 56 cannot perform an AND operation and no sound is generated due to a change in the set value. In this embodiment, the sounding body 53 is used as a warning device.
Although the present invention is not limited to this, it goes without saying that a known or other warning circuit may be used. As described in detail above, according to the present invention, when setting shooting information including shooting mode selection settings electrically, a warning is given every time the setting value is changed, so the photographer can confirm that the setting value is changed. To provide a warning device for a camera that allows users to confirm with their ears that the camera is being used, has no inferiority in operation feel compared to conventional mechanical systems, and takes into account the psychological problems of photographers.

[Brief explanation of the drawing]

Figure 1 is an external view of a camera showing an embodiment of the present invention, Figure 2 is a configuration diagram of the internal mechanism of the camera shown in Figure 1, and Figures 3 and 4 are similar to Figures 1 and 2. 3 is a circuit diagram for setting the shooting mode and shooting information, etc.; FIG. 4 is a circuit diagram for photometry calculations and switching shooting modes; and FIG. d and e are diagrams showing the external display state of the camera shown in FIG. 1, respectively, and FIG.
is a diagram showing the external display in shutter priority mode,
Figure 5b shows the external display in aperture priority mode, Figure 5c shows the external display in shutter priority magic mode, and Figure 5d shows the external display in aperture priority magic mode. , FIG. 5e is a diagram showing the external display in the program shooting mode. 3... Release button, 4 ₁ , 4 ₂ , 4 ₃ ... Operation button, 5 ₁ , 5 ₂ , 5 ₃ ... Display window, 6... Safety button, 7... Card insertion slot, 8... Program card, 9... Shift knob, 10...Ready button, 12
...Program card input section, 14, 23, 33,
38, 39... Counter, 17, 56... AND gate, 57, 58... OR gate, 43... External display circuit, 44... Decoder, 47... Counter, 48... Comparator, 49... Adder, 53... Sound generator, 59
...Warning control button, 60...Photometry circuit, 65,6
9... Addition circuit, 68, 70... Subtraction circuit, 73... Program switching circuit, 71, 72... OR gate, 8
0...Finder display circuit, 82...Shutter control circuit, 83, 84, 85, 86...Comparator, 9
1...Magic mode switching circuit, _S1 to _S13 ...switch, _m1 to _m7 ...terminal, _N1 to _N4 ...switch.

Claims (1)

[Claims] 1. A camera in which numerical values of photographing information such as shutter speed and aperture value are changed by changing the contents of a photographing information counter by operating an external operation switch,
a photographing information input means for generating a pulse in response to a switch operation of the external operation switch and inputting the pulse to the photographing information counter to perform variable setting of photographing information; and timing for changing contents of the photographing information counter by the pulse. A sound generation signal forming means for generating a sound generation signal every time the content is changed in synchronization with the content, and an alarm sound generation means for generating a warning sound in response to the sound generation signal from the sound generation signal forming means. Camera warning device.