JPH0234368B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera in which camera setting information such as shutter speed or aperture value is input using a dial-shaped setting member.

Conventionally, when inputting photographing information into a camera, the photographing information is written on a member that rotates according to the shutter speed or aperture value, and a brush and a variable resistor linked to the member are used to input the photographing information to the variable resistor. There is a first method in which the information is converted into a resistance value and inputted, a second method in which a code plate is provided in place of the variable resistor to convert the shooting information into a digital value and inputted, and two switches and a display are provided. The third step is to input the photographing information shown on the display by stepping up or down by pressing the two switches depending on whether the photographing information shown on the display is made larger or smaller.
method is known.

However, all of the above-mentioned methods have major drawbacks. In other words, the first method uses a variable resistor, so if you want to improve accuracy, you will need a precise variable resistor, and if you use commercially available variable resistors, you will have to sort through and select a precise variable resistor. It also has the disadvantage that it is difficult to accurately mount a brush that precisely slides on a precision variable resistor, which increases the cost because the resistor for adjustment must be machined when used. In addition, in the second method, three or more bits are usually required when digitally inputting photographic information, and increasing the number of bits has the disadvantage that the electrode area of the code plate becomes larger. When inputting code board information to a computing unit normally made with an IC that calculates shooting information, multiple wires are required depending on the number of bits of each code board, and the number of pins on the IC increases. This makes it difficult to implement, making it undesirable for small devices such as cameras. Also, the first
In the second method, shooting information is written and displayed on a member that rotates according to the shutter speed or aperture value, so as the amount of shooting information to be set increases, the display becomes finer and less noticeable to the user. This has become a major drawback in devices such as cameras, where ease of use is a major factor in evaluation. Furthermore, the third method has a simple configuration because it consists of two switches and a display. However, if the display is in the camera's viewfinder, the user must press these setting buttons while looking at the viewfinder and pressing the metering start switch, and press the two buttons with two fingers of one hand. The downside was that it was difficult to press. In particular, for cameras with a mechanism where the above-mentioned metering start switch is turned on by pressing the first step of the release button and released by the second press, press the first step metering start switch with your index finger.
If you try to press the up button or down button with another finger, you will end up pressing the second shutter release and taking a picture while setting the shooting information. Techniques to eliminate these drawbacks are disclosed in Japanese Patent Application Laid-Open No. 58-639322 and
-Disclosed in Publication No. 63933. That is, the above-mentioned publication discloses a technique for detecting the driving direction of the photographing information setting member by determining the phases of two signals having mutually different phases, and increasing or decreasing the set value.

However, in the case of the technique disclosed in the above-mentioned publication, since there is no click in the information setting member, the information setting member does not move even a little, especially at the position where the pattern where one of the two signals changes changes. As a result, the set value of the photographic information changes, and if a release operation is performed at that point, there is a drawback that the film will not be exposed at the desired set value.

In particular, in cameras where the shutter speed and program mode are both selected using the same component, the shutter speed is generally set at the position where the longest shutter speed is set or the shortest shutter speed, as seen on the shutter speed setting dial. It has become common to have a position for setting the program mode adjacent to the setting position, so even if the program mode is set during shooting, if the information element moves slightly for some reason, Even though the program mode has been set in the setting component, the user's intention to switch the shutter speed to the longest or shortest shutter speed may be greatly different from that of the user's intentions, or the subject's brightness may be incorrect. In some cases, there was a fear that the subject would be overexposed or underexposed, making it impossible to photograph.

In view of this point, the present invention provides a click on the information setting member to prevent the setting value from being changed by accidentally touching the information setting member other than when setting the information, and to prevent the setting value from being changed by accidentally touching the information setting member. When there is a risk of changing the setting value by operating the
In other words, when manually operating the information setting member, unless the information setting member is in a stable state when the information setting member is clicked to stop, the release operation is performed even if the second stroke of the shutter button is pressed, and the film is not released. By prohibiting exposure, the information settings are always set reliably without changing regardless of the photographer's intentions during shooting, and the shooting is performed as intended by the photographer. The purpose is to provide a camera that is possible.

The present invention will be explained in detail below using the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. In Figure 1, SPD is a light receiving element, OP1 is an operational amplifier that converts the current output by the light receiving element SP according to the subject brightness into a voltage logarithmically compressed by diode D1, that is, the apex value B _V of the subject brightness, and V _G1 is a constant voltage. The power supply is connected to a variable resistor V _R1 for inputting information according to the film sensitivity S _V. OP2 is an adder that adds the subject brightness B _V output by the operational amplifier OP1 and the film sensitivity S _V set by the variable resistor V _R1 and outputs the photometric value _EV . Comparator CP1 is an up-down counter CN3. Resistors R ₃ , R ₄ , R ₅ , R ₆ , R ₇ and adder
Configures AD converter I together with OP3. The CPU is a microcomputer and is hereinafter referred to as CPU.
CPU output port MO is a clock generator
It is connected to one terminal of an AND gate G1 provided between CG1 and the clock terminal of counter CN3. SWA and SWB are each composed of a code plate and a brush as shown in Figure 6, and each is a switch for detecting up mode and down mode.
Connected to CPU input ports I ₀ and I ₁ . SW5
is a switch that turns on when the camera's film has finished winding. SW6 is a mode switch that switches between shutter priority mode and aperture priority mode. It turns off when in aperture priority mode and turns on when in shutter priority mode. . DE1 is a binary-decimal decoder, and the CPU output port T ₀ ,
The shutter seconds information output from T ₁ and T ₂ is expanded and converted into actual shutter seconds. SW4 is the front curtain switch that turns on when the front shutter curtain starts running.
CG1 is a clock generator, CN1 is a counter that counts the clocks of the clock generator CG1 after the shutter front curtain switch SW4 is turned on.
MC1 is a magnitude comparator that compares the outputs of counter CN1 and decoder DE1, and FF1 is a magnitude comparator whose reset terminal R is
The set terminal is connected to the front curtain switch at the output end of MC1.
A flip-flop connected to SW4 controls the energization of the shutter rear curtain holding magnet MG3.
CN2 is a counter that calculates the pulse from the aperture switch SW3, which repeatedly turns on and off in conjunction with the aperture of the photographic lens and generates a pulse.
MC2 is a magnitude comparator that compares the aperture value information output from output ports A ₀ , A ₁ , and A ₂ of the CPU with the output of counter CN2, and FF2 is an aperture control that stops the aperture of the photographic lens when power is turned off. The second stroke of the release button is turned on by the flip-flop that controls the energization of the magnet MG1 of the CPU, and the camera is reset by a signal output from the terminal M1 until the camera's release operation begins. MG2 is the first tension release magnet, which is a mirror up magnet that starts the mechanical camera shooting sequence, and DD1 is the magnet for displaying the signals output to the CPU output ports L ₀ , L ₁ , and L ₂ . a decoding driver that converts data into
DI1 is a display device for displaying the signal of the decode driver DD1, and is provided outside the camera as described later. DD2 is the CPU output port F ₀ , F ₁ ,
DI2 is a decode driver that converts the signal output to _F2 into data for display, and DI2 is a display device for displaying the signal of decode driver DD2, which is provided inside the viewfinder of the camera as described later.

In this embodiment, the shutter speed value and the aperture value can be set in eight different ways, so each set value can be expressed in 3 bits, but the register that holds the shooting information is made up of 8 bits. Next, the appearance of a camera according to an embodiment of the present invention will be explained using FIG. 4.

FIG. 4 is an external view from above of a camera according to an embodiment of the present invention. In FIG. 4, 51 is a setting dial, 52 is a mode selection member that selects either shutter speed priority mode or aperture value priority mode in conjunction with the switch SW6, and 53 is a display provided with the indicator DI1. Department.

FIG. 5 is an enlarged view of the display device DI1. When the shutter time priority mode is selected by the mode selection member, Tv, two arrows, 1000, 30'', and shutter time are displayed on the display DI1 shown in FIG. Seven segments of the digit are activated, and the fifth segment is activated when aperture priority mode is selected.
Of the displays on the display DI1 shown in the figure, four-digit segments displaying Av, two arrows, 32, 14, and the aperture value are driven.

Next, the configuration of the switches SWA and SWB that are switched in conjunction with the setting dial 51 is shown in Figures 6 and 6.
This will be explained using Figure-1 and Figure 6-2.

FIG. 6 is a diagram showing the configuration of switches SWA and SWB provided below the setting dial 51 shown in FIG. 4. In FIG. 6, 61 is an electrode pattern section fixed to the camera, and 62 is a rotating section that rotates in conjunction with the rotation of the setting dial. 63
is an electrode provided on the electrode pattern section 61, and together with brushes 69 and 71, a lever 66, and a common electrode pattern section 65, which will be described later, constitutes a switch SWA.
Reference numeral 64 denotes an electrode provided on the electrode pattern section 61, and like the electrode 63, it is also used as a switch along with brushes 70, 71, a lever 62, and a common electrode pattern section 65, which will be described later.
It constitutes SWB. Note that 65 is an electrode pattern portion that is grounded and is always in contact with the brush 71. Reference numeral 66 denotes a conductor lever fixedly attached to the rotating portion 62, and the brushes 69, 70, 71 are provided thereon. Reference numeral 67 denotes a concave portion provided inside the pattern portion 61, and together with a leaf spring 68 provided on the rotating portion 62, constitutes a click.

Here, from the state where the setting dial is at the click position as shown in Figure 6, turn the switch in the UP direction as shown in Figure 6 until it reaches the next click.
Explain changes in the state of SWA and SWB. Initially, since the switch is at the click position, both switches SWA and SWB are grounded and become 0.0 as shown in a in Figure 6-1.

Next, when the setting dial is rotated in the UP direction, the rotating part 51 also rotates, and the brush 70 moves to the electrode 6.
4, the status of switches SWA and SWB becomes 0.1 as shown in Figure 6-1b. When the setting dial is further rotated in the UP direction, the brush 71 no longer comes into contact with the electrode 63, and the switch is turned off.
The status of SWA and SWB is as shown in Figure 6-1 c.
It becomes 1.1. When the setting dial is further rotated in the UP direction, the brush 70 comes into contact with the electrode 64 again, so the states of the switches SWA and SWB become 1.0 as shown in Figure 6-1 d.If the setting dial is continued to be rotated, the switches SWA and SWB become 1.0. The state of SWB becomes 0.0 again as shown in Figure 6-1 e(a). Similarly, when the setting dial is rotated in the opposite direction, the states of the switches SWA and SWB change as shown in FIG. 6-2.

The operation of one embodiment of the present invention constructed as described above will be explained using the flowcharts shown in FIGS. 2, 3, and 3-1.

In this embodiment, as mentioned above, the shutter speed value and the aperture value can each be set in 8 types, so the 8 types of setting values are 0, 1, 2, 3,
4, 5, 6, and 7 and are processed within the CPU. Here, when the first stroke is pressed and a power switch (not shown) is turned on, an intermediate value among the above-mentioned setting values is set as the initial setting of the photographing information.
Therefore, 3 is stored in the 8-bit register RA. This is shown in (1) of the flowchart. (Only the numbers are shown below.) Also, this initial setting value should be set to the highest value that is normally used.

Next, it outputs 1 to the output port M0, opens the gate G1, inputs the clock pulse from the clock generator CG1 to the counter CN3, and starts the AD conversion operation. (2) Next, it is detected whether or not the film winding of the camera is completed based on the information from the input port _I3 connected to the switch SW5. (3) If it is detected from the information of input port _I3 that the film winding has been completed, the flow goes to (5), and if it is detected that the film winding is not completed, the flow goes to (7). branches. (4) When the film winding is completed, it is detected whether the second stroke of the release button is on or not based on information from the input port _I2 connected to the switch SW2. (5) If it is detected that the second stroke of the release button is not turned on based on the information of input port I _2, the flow branches to (18) if it is detected that the second stroke of the release button is turned on. do. (6) As shown in Figure 2, the contents of (7) are as follows: If the contents of input ports I ₁ and I ₀ are 0.0, the calculation is performed from the photometric value and the set value, the calculated value is obtained, and the set value is calculated. Display the value. If the contents of input ports I ₁ and I ₀ are not 0.0,
It detects which direction the setting dial is rotated, increases or decreases the setting value, calculates the set value and the measured value, displays the set value and the calculated value, and then turns the setting dial to the next click. If the setting is returned before it stops, the setting value is increased or returned to the setting value before being down, the setting value and the calculated value are displayed, and the setting dial is clicked, as is clear from the flow of judgment to end the setting. If you do not turn the shutter button to the next click, it will be determined that the setting is complete, and the loop of I ₁ and I ₀ IN will continue and the next flow will not be entered. (18) The process does not proceed to the flow below where the photographing operation is actually performed.
Next, the content of (7) will be explained in detail using FIG. It is detected from the information of input ports I ₁ and I ₀ whether the switches SWA and SWB are turned on. (7-1) When the signals at input ports I ₁ and I ₀ are both 0.0, the dial is in a stable state where it is clicked as shown in Figure 6-1, so go to (7-29).
If it is not 0.0, the flow branches to (7-3). (7-2) Input ports I ₁ and I ₀ are 1.0, that is, SWB is off,
Detect whether SWA is on. Since this is the up mode in which the dial is turned in the forward direction, the dial changes from state a to state b shown in Figure 6-1, so input ports I ₁ and I ₀
changes from 0.0 to 1.0. Therefore input port
When the states of I ₁ and I ₀ are 1.0, the flow branches to (7-5), and if the states of input ports I ₁ and I ₀ are not 1..0, the flow branches from state a shown in Figure 6-1. Turn the dial in the opposite direction to change to state d.
It is determined that the current mode is selected, and the flow branches at (7-6). (7-3) Add 1 to the contents of register RA. If the program starts from the start, (1) registers
Since the contents of RA are set to 3, register RA
The contents of are added by 1 to become 4. (7-5) Execute the display subroutine DISP. By executing DISP, the photometric value and the signal from mode changeover switch SW6 are displayed. This subroutine will be explained using FIG. 3-1. In (2)
Since the output port _M0 of the CPU is set to 1, the counter CN3 shown in FIG. 1 performs A/D conversion of the Ev value in response to the output of the comparator CP1. Therefore, A/D converter I is connected from input ports E ₀₁ to E3 of the CPU.
Take in the A/D converted value of. (8-1) Subtract the contents of the photographing information register R _A set by the dial operation from the A/D converted Ev value and store the result in the register R _B. (8-2) Take in information from the switch SW6, which sets the shutter speed value priority mode or the aperture value information priority mode, from the input port _I4 . (8-3) Based on the information of the input port _I4 , the flow branches to (8-5) when the shutter speed priority mode is set, and to (8-7) when the aperture value priority mode is set. (8-4) AND _the value of register R _A and 07 and store it in register R _C.
The 4th bit becomes 0. (8-5) OR _the value of register R _B with 08 and store it in register R _D.
The 4th bit becomes 1. (8-6) OR the value of register R _A with 08 and set the register
When stored in R _C , the 4th bit from the bottom of register R _A becomes 1. (7-7) When the value of register R _B is ANDed with 07 and stored in register R _D , the lower 4 bits of register R _B are
The number becomes 0. (8-8) That is, flows (12), (13) and (14), (15)
When the fourth bit of register R _A R _B is detected by executing , it is possible to determine whether the contents of the register indicate shutter time value information or aperture value information.

In addition, in this embodiment, shutter time value information and aperture value information are the lower 3 bits of each register.
Although it is expressed as , the value may be 3 bits or more depending on the result of the operation. Various countermeasures have been used for this purpose, but they are well known and are not related to the gist of the present invention, so their description will be omitted.

Next, the results obtained in (8-5) or (8-7) are output to output ports L0 to L3. Therefore, the display device DI1 is driven by the data driver DD1 shown in FIG. (8-9) Output the results obtained in (8-6) or (8-8) to output ports F0 to F3. Therefore, the data driver DD2 in Figure 1 enables the display device DI.
2 is driven. After executing the above instructions
Return to the original flow with the RETURN command. (8-10) This completes one sequence of information input → calculation → display, and the next sequence of information input is performed.
Return to step (3) and run the same program again, and the setting information and calculated shooting information according to dial operations will be displayed. Therefore, the photographer must switch between shutter speed priority mode and aperture value priority mode.
6, set the shooting information settings while looking at the display DI1 provided outside the camera, and then calculate the appropriate exposure value from the subject brightness and film sensitivity on the display provided inside the viewfinder.
This can be confirmed on DI2.

(7-7) The following flow will be described.

Enter I ₁ and I ₀ again. (7-7) Detect whether it is in the b state again, and if it is in the b state, return to (7-7), and as long as the b state persists, continue the loop of (7-7). Repeat. This is done to compensate for the speed of dial movement since the dial is moved manually. (7-8) Now, by further rotating the dial in the forward direction, the input ports I ₁ and I ₀ change from 1.0 to 1.1 as shown from state b to state c in FIG. 6-1. Therefore, whether the dial is rotated further in the forward direction is detected by determining whether the input ports I ₁ and I ₀ are 1.1. If you turn the dial in the opposite direction here, input ports I ₁ and I ₀ will be 1.0
Since it returns to 0.0 and does not become 1.1, the flow is (7
−16). If you turn the dial in the forward direction, the input port will become 1.1 and the flow will shift to (7-10). (7-9) Next, in (7-11) and (7-12), (7-7),
Similarly to (7-8), it is detected whether the dial has been rotated further. By further rotating the dial in the forward direction, the input ports I ₁ and I ₀ change from 1.1 to 0.1 as shown from state c to state b in FIG. 6-1. Therefore, whether the dial is rotated further in the forward direction is detected by determining whether the input ports I ₁ and I ₀ are 0.1. If you turn the dial backwards here, the input port will be 1.1
Since the value returns to 1.0, the process returns to step (7-7), which is the b state determination routine. When the dial is rotated in the forward direction, the input port changes from 1.1 to 0.1 and the flow shifts to (7-13). (7-12) Next, in (7-14) and (7-15), (7-10),
Similarly to (7-11), (7-7), and (7-8), it is detected whether the dial has been rotated.
By further rotating the dial in the forward direction and bringing the dial to the click position again, d in Figure 6-1 is reached.
As shown from state to e state, input ports I ₁ and I ₀ are 0.1
Changes from to 0.0. Therefore, input ports I ₁ , I ₀ determine whether the dial is further rotated in the forward direction.
Detected by determining whether or not is 0.0. If the dial is rotated in the reverse direction at this point, the input port returns from 0.1 to 1.1, so the process returns to the c-state determination routine (7-10). Rotating the dial in the forward direction changes the input port from 0.1 to 0.0 and moves to flow (2) with the GoTo(2) command. (7-15) In (7-9), if the input ports I ₁ and I ₀ are not 1.1, that is, the state c shown in Figure 6-1, the dial has been returned halfway (7-5) If 1 is added to the contents of register RA in
Since the contents of register RA are incorrect, execute the DECRA instruction to subtract 1 from the contents of register RA to restore the contents of register RA to its original state. (7-16) Similarly, (7-21) is (7-3) to (7-15)
Similar to the command (7-16) in the flow up to, if the dial is returned midway in the flow from (7-4) to (7-27), the command (7-4) is executed.
The DECRA instruction subtracts 1 from the contents of register RA, but since the contents of register RA are incorrect, execute the INCRA instruction that adds 1 to the contents of register RA to restore the contents of register RA to the original values.

(7-28) is a routine transferred from (7-2) and executes a subroutine DISP for calculation display similar to (7-6) and (7-17).

Also, in (7-3), if the input port is 1.0, that is, not in the b state shown in Figure 6-1, the dial is rotated in the opposite direction and becomes the d state, or the b state is jumped from the a state and the c state is reached. It is possible that the state is changed to state C, or the state is transferred from state A to state D and becomes state C. however
The CPU is very fast and the program is progressing,
No matter how fast you move the dial manually, no matter how fast the CPU runs the program shown in Figure 2,
There is little possibility that one state will jump from one state to the c state, and in (7-2) the input ports I ₁ and I ₀ will be
When input ports I ₁ and I ₀ are determined to be not 0.0 in the next sequence after being determined to be 0.0, the dial often changes from state a to state b or state d. Therefore, when it is determined in (7-3) that the input port is not in the b state, it is detected whether the input port is in the 0.1 state, that is, the d state. Here, if the dial is in the d state, the flow moves to (7-16), and if not in the d state, the flow moves to (7-15). The flow for detecting down mode from (7-16) to (7-24) is almost the same as the flow for detecting up mode from (7-5) to (7-14), Since only the discrimination command is different, a detailed explanation will be omitted. Therefore, unless the setting dial is rotated to the click position, the CPU will not be able to get out of the flow shown in FIG. 3 and will not move on to the next sequence. That is, even if the second stroke of the shutter button is pressed, the release operation is not performed and is prohibited.

By rotating the setting dial to the click position, you can escape from the flow shown in Figure 3 and enter the second
Move to the flow shown in (3) in the figure, and if the winding is not completed, repeat the flow of (3) → (4) → (7).
If winding is not completed and the second stroke of the release button is not pressed, (3) → (4) → (5)
→ Repeat the flow of (6) → (7). When the second stroke of the shutter button is pressed after film winding is completed, the flow branches to (18) at (6).

The flow from (18) to (27) will be explained below.

When the second stroke of the shutter button is turned on, the CPU inverts the signal output to the output port MO from 1 to 0, closes the AND gate G1, and stops the clock input to the counter CN3. The outputs of the terminals _Q0 to _Q3 , that is, the A/D converted value of the photometric value EV, are latched. Therefore, during shooting, the mirror is raised and the light receiving element is
Since no light enters the SPD, operational amplifier OP1
Even if you want to display it immediately after shooting when the output of
3, so there will be no erroneous display. (18) In the case of shutter time priority mode, the fourth bit from the bottom of the result register RC in (12) is 0,
In the case of aperture value priority mode, use the fact that 1 is stored in the fourth bit from the bottom of the result register RC in (14) to determine the fourth bit from the bottom of the register RC. Accordingly, the flow is branched to (20) in the case of the shutter speed priority mode and to (21) in the case of the aperture value priority mode. (19) If shutter time priority mode is detected in (19), the register calculated in (12)
The contents of RC, that is, the set shutter speed information, are output to output ports T ₀ to _{T 2} , and the contents of register RD calculated in (13), that is, the aperture value information that is calculated from the photometric value EV and the shutter speed information. is output to output ports _A0 to _A2 . (20) If the aperture priority mode is detected in (19), the contents of register RC are output to output ports A ₀ to A ₂ , contrary to (20), and the contents of register RC are Output to output ports _T0 to _T2 . (21) The CPU outputs 1 to the output port M2, the counter CN2 is reset, and the RS flip-flop FF2 is set. Therefore, the aperture control magnet MG1 is energized, and the aperture lever (not shown) is unlocked. (22) The CPU inverts the signal at the output port M1 from 1 to 0 and releases the reset of the counter CN2. R.S.
The output of the flip-flop FF2 does not change, and the aperture control magnet MG1 continues to be energized. (23) The CPU outputs 1 to the output port M2, the first clamping magnet MG2 is energized via the inverter G2, and at the same time as the camera mechanism (not shown) starts to raise the mirror, the aperture of the photographic lens starts. Ru. (24) The CPU inverts the signal at the output port M2 from 1 to 0 and de-energizes the first clamping magnet MG2. (25) The switch SW3, which is composed of a brush linked to the aperture lever of the photographic lens and a comb-like electrode (not shown), repeatedly turns on and off as the photographic lens is apertured, generating pulses, and the number of pulses is calculated by the counter CN2. is counted. The aperture value information output from the output ports _A0 to _A2 of the CPU is compared with the aperture information output from the counter CN2, and when they match, the magnitude comparator MC2 outputs 1, and the RS flip-flop FF2 is reset and the output becomes 1,
The MG1 is de-energized, a not-shown narrowing lever is locked, and the narrowing down operation is completed. After mirror up and aperture are completed, the camera mechanism automatically starts running the front curtain of the shutter and turns on switch SW4.

In addition, before switch SW4 is turned on, the counter
Both CN1 and RS flip-flop FF1 have been reset. After the switch SW4 is turned on, the counter CN1 counts the output pulses of the clock generator CG1. CPU output port T ₀ ,
When the shutter time information output from T ₁ and T ₂ and the time measurement information output from the counter CN1 match, the magnitude comparator MC1 outputs 1 and the RS flip-flop FF1 is reset. Therefore, the output becomes 0,
The shutter rear curtain holding magnet is energized,
The rear curtain of the shutter starts running, and when the rear curtain of the shutter completes running, the switch SW5 is turned off and the camera exposure control ends.

Whether or not the film has been wound is determined by detecting information from the input port _I3 to which the signal from the switch SW5 is input. (26) If the film winding has not finished, the information on the input port _I3 is detected again, and if the film winding has finished, the flow moves to (2). (27) In this embodiment, the display devices DI1 and DI2
are placed on the top of the camera and inside the viewfinder, respectively, but they may be placed near the setting dial 51 so that both the setting value and the calculated value can be seen from the outside of the camera, or both may be placed inside the viewfinder. good. In addition to the display shown in Figure 5, when displaying shutter seconds by one step under or one step over the numerical value displayed in 7 segments of 4 digits, the position of 1000, 30'' should be used. When displaying the aperture value, it may be displayed at the 32 and 14 positions.In that case, the decode driver
This can be easily realized by changing DD1 and DD2 and changing the display member. Further, in this embodiment, an input device for shutter or aperture information is shown, but the present invention is not limited to this, and can be used, for example, to set the number of sheets of film and data for a data imprinting device. Further, in this embodiment, the rotation of the setting dial is detected using electrodes and brushes, but the rotation of the setting dial may be detected optically or magnetically by providing a photointerrupter or a magnetoresistive element.

Further, the arrangement of the click positions and the electrode pattern positions shown in FIG. 6 is not limited to the present embodiment shown in FIG. 7, but may be arranged as shown in FIG. FIG. 7 is a diagram showing the arrangement of click positions and electrode pattern positions, and in FIG. 7, △ indicates the click position.

To arrange the clicks as shown in FIG. 7, the order of the programs shown in the flowchart of FIG. 3 may be changed in accordance with changes in the states of the switches SWA and SWB. Also,
In the case shown in Fig. 7, in Fig. 7, ,
In the case shown in , the set value was changed by providing a click every four times the state of the switch SWA, SWB changed, whereas the setting value of the switch SWA, SWB
Each time the state changes twice, a click is provided to change the set value. In this case as well, the program shown in the flowchart in Figure 3 is the switch SWA,
Switch SWA, SWB was a program that changed the setting value after determining SWB four times.
The setting value may be changed after performing the determination twice.

Further, in this embodiment, since the release operation is prohibited when the photographing information setting member is at the click position, the display of the set photographing information is changed by only a slight operation of the setting member. Therefore, when setting shooting information, the user can immediately detect whether the shooting information is being stepped up or down by just a small operation of the setting member. Even when the setting member is operated to step down when it should be stepped up, the user can immediately recognize the erroneous operation.

As described above, according to the present invention, by providing a click on the information setting member, it is possible to prevent the setting value from being changed by accidentally touching and operating the information setting member other than when setting the information, and to prevent the setting value from being changed. When manually operating a member, the release operation is performed and film exposure is performed even if the second stroke of the shutter button is pressed, unless the information setting member is in a stable state where the information setting member stops with one click. This prevents the shooting information settings from changing during shooting regardless of the photographer's intention, resulting in a photo that does not match the photographer's intention, and prevents the setting values from changing during manual shooting. As a result, it is possible to realize a camera that can always take pictures as intended by the photographer without obtaining underexposed or overexposed photographs, which is highly effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
The figure is a flowchart of the microcomputer shown in Figure 1. Figure 3 is a flowchart showing a part of the flowchart shown in Figure 2 in detail.
Figure 1 is a flowchart explaining the display subroutine DISP, Figure 4 is an external view of a camera according to an embodiment of the present invention seen from above, and Figure 5 is an enlarged view of the display device DI1 shown in Figure 4. , Figure 6 shows the switch installed at the bottom of the setting dial shown in Figure 4.
Figure 6-1 is a diagram showing the configuration of SWA and SWB, and Figure 6-2 is a diagram showing changes in the status of switches SWA and SWB shown in Figure 5 when the setting dial is rotated in UP mode. The switch shown in Figure 5 when the setting dial is turned in down mode.
FIG. 7 is a diagram showing changes in the states of SWA and SWB, and is a diagram showing the arrangement of click positions and electrode pattern positions. CPU...microcomputer, 62...rotating part, 67...recess, 68...plate spring.

Claims (1)

[Claims] 1. A rotary operating member, a first pattern portion that forms a repetitive pulse in conjunction with the operation of the rotary operating member, and a pulse that has a predetermined phase shift with respect to the pulse formed by the first pattern portion. detecting a combination of pulses from the first and second pattern portions formed by operating the rotation operating member;
a determination circuit that determines that the combination of pulses has transitioned from a first specific combination state to the first specific combination state via a plurality of predetermined combination states in a predetermined order; , a photographing information setting circuit that updates photographing information each time the determination circuit detects a transition from the first specific combination state to the first specific combination state via the above combination state; and the combination of the pulses is the first
a click member that performs a click action on the rotary operation member at a position that indicates a first specific combination state; and when the determination circuit determines that the combination of the pulses indicates a first specific combination state; A camera characterized in that it is provided with a release control circuit that allows the release circuit to respond to an operation of a release member.