JPH01279227A - Motor-driven drive device for camera - Google Patents

Abstract

PURPOSE:To lower the volume of the operating sound of the title camera by providing a high-speed mode in which a film feeding motor is rotated at a high speed and a silent mode in which the motor is rotated at a low speed so as to lower the volume of film feeding sounds in a switchable state. CONSTITUTION:A variable-speed motor drive circuit 2 which can select the high-speed mode in which the film feeding motor 1 is rotated at a high speed or the silence mode in which the motor 1 is rotated at a low speed so as to lower the volume of film feeding sounds, a switch 3 for switching mode between the high-speed and silence modes, and mode switching means 4 which switches the mode between the high-speed and silence modes in accordance with the operation of the switch during a specific camera sequence are provided. The switch 3 is constituted of, for example, a slide switch set in such a way that the high-speed mode can be selected when the switch is at one-side operating position and the silence mode can be selected when the switch is at the other- side operating position. Therefore, the film feeding speed or film feeding sounds can be adjusted by a photographer himself in accordance with the photographing condition.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric drive device for a camera.
For example, it is used in a camera having an electric film winding and rewinding function.

[Prior Art] Conventionally, in a motor drive device that winds the film of a camera using electric drive, the frame speed is 5 frames/second, 3 frames/second,
A switchable speed such as 2 frames/second is known. This type of switching of the frame speed is done to determine the number of times the shutter release occurs per second, and is not intended to make the operating sound of the motor variable. Therefore, the method of switching the frame speed also depends on the motor. The drive speed itself is not changed, but only the waiting time at the end of the film winding sequence is changed.

[Problem to be solved by the invention] High speed is generally required for automatic film winding and automatic rewinding, and many efforts have been made to achieve this, but on the other hand, there is also a demand for quieter operation. There is something strong. In particular, the sound of cameras operating in places where silence is required, such as concert venues and wedding halls, is unpopular.

It is desirable to be fast and quiet, but it is very difficult to satisfy both at the same time. Therefore, it is thought that by making it possible to select either one preferentially depending on the shooting situation, it will be possible to alleviate many of the unpopular cases of loud operation noise that have conventionally been complained of.

The present invention has been made in view of these points, and an object of the present invention is to provide an electric drive device for a camera that can reduce camera operation noise as necessary.

[Means for Solving the Problems] In the present invention, in order to solve the above problems, the first
As shown in the figure, in a camera equipped with an electric film winding and/or rewinding device, there is a high-speed mode in which the film feeding motor 1 is rotated at high speed, and a noise reduction mode in which the film feeding motor 1 is rotated at a low speed to reduce film feeding noise. a variable-speed motor drive circuit 2 capable of selecting a mode, a switch 3 for switching between high-speed mode and silent mode, and switching between high-speed mode and silent mode according to the operation of switch 3 during a specific camera sequence section. The present invention is characterized in that a mode switching means 4 is provided.

Here, the switch 3 is made of, for example, a slide switch, and when it is in one operating position, the high speed mode is selected, and when it is in the other operating position, the silent mode is selected. Further, as the switch 3, a push switch that also serves as a rewind button can also be used. In the latter case, the silent mode is selected only during the period when the switch 3 is being operated, and the high speed mode is selected during the period when the switch 3 is not being operated. Or switch 3 is 1
The high speed mode and the silent mode may be switched each time the button is operated.

[Function] Hereinafter, the function of the present invention will be explained with reference to FIG. , and a mute mode in which the film is rotated at a low speed to reduce film feeding noise. Switching between the high speed mode and the silent mode is performed by the mode switching means 4 in accordance with the operation of the switching switch 3.

Therefore, if the photographer wants to feed the film at high speed even if the film feed sound is loud, select the high-speed mode, and if the photographer wants to reduce the film feed sound even if the film feed is slow, select the high-speed mode. By selecting the mode, it is possible to satisfy either the need for faster film feeding or quieter film feeding depending on the shooting situation.

[Example] Fig. 2(a) is a plan view showing the external appearance of a camera to which the present invention is applied, and Fig. 2(b) is a front view thereof.
SB is a shutter button, and when it is pushed halfway through its stroke, the photometry switch SWl, which will be described later, is turned on and the photometry circuit, which will be described later, starts operating.When it is pushed all the way, the release switch SW2, which will be described later, is turned on. the shutter is released. L
B is a silver lens exchanger, which is operated by pressing when removing an exchangeable lens. Other switch SW,
5W14oD day, 5WSELF, SWR4, sw, 7g
, 5WRc, electrical contacts 111 to 115, LCD panel 4
00 will be described later in the explanation from FIG. 3 onwards.

FIG. 3 is a diagram showing the overall circuit configuration of a camera to which the present invention is applied. 100 is a circuit inside the camera body, and CP
Contains U200 and its peripheral circuits. Reference numeral 110 denotes a group of electrical contacts provided on the mount portion of the camera body, and a group of electrical contacts 51 provided on the mount portion of the interchangeable lens 500.
make electrical contact with 0. The CPU 200 in the camera body circuit 100 connects these electrical contact groups 110 and 51.
0, information is transmitted to the interchangeable lens internal circuit 520. 120 is a battery, and the circuit 1 inside the camera body
00 and the circuit 520 inside the interchangeable lens. 130 is a power supply circuit, which supplies each circuit with a constant voltage obtained by stabilizing the battery voltage VEE output from the battery 120, and supplies a constant voltage VOO outputted at all times and a 0N1
The constantly output voltage VDD, which has two outputs of a constant voltage Vcc that is 0FF controlled, is used as an operating power source for the CPU 200. The ON10FF controlled voltage Vcc is used as an operating power source for other circuits. However, the motor drive circuit 262 is directly supplied with battery voltage VEE output from the battery 120. A power circuit control signal PWC is supplied from the CPU 200 to the power circuit 130. When this signal PWC is set to the "Low" level, the constant voltage Vcc is output from the power supply circuit 130, and when it is set to the "High" level, the constant voltage Vcc is cut off. Sometimes, this signal PWC is set to "Low" level.

The CPU 200 controls operations such as photometry, display, exposure, and film winding of the camera, and operates according to a program shown in a flowchart described later. 210 is C
This is a capacitor for PU reset, and the battery 12 is connected to the camera.
0 is loaded, the CPU 200 is initialized.

A clock oscillation circuit 212 oscillates an operating clock for the CPU 200. 220 is a photometric circuit, and the CPU
When a photometry command is received from 200, the light from the subject that has passed through the photographic lens is measured, the measurement result is A/D converted, and is transmitted to the CPU 200 as subject brightness information. 230 is a DX contact, which is provided in the film chamber and reads the DX code provided on the film cartridge and transmits it to the CPU 200 as film sensitivity information. Reference numeral 240 denotes an aperture control circuit 1, which controls the aperture so that the aperture value is set by the CPU 200. 2
A shutter control circuit 50 controls the shutter so that the shutter speed is set by the CPU 200. Reference numeral 260 denotes a motor, which performs shutter charging and film winding in parallel by rotating in the normal direction, and rewinds the film by rotating in the reverse direction. A motor drive circuit 262 controls the motor 260 in accordance with a control signal from the CPU 200. 270 is a buzzer that sounds under the control of the CPU 200 when warning camera shake or when shooting with a self-timer.

Various switches are connected to the input port of the CPU 200. Each switch will be explained below.

SWM is the main switch. Main switch SWM
is a slide type automatic return type switch, and during normal operation (when not in operation), the main switch SW? ! is in the OFF state, and is turned ON by sliding the switch against the force of the return spring. Main switch SWM
When released, the force of the return spring automatically returns it to its original position, turning it into the OFF state. As stated in f &
The CPU 200 checks the status of the main switch S area periodically (for example, every 250 m5ec).
Each time the main switch SWM is turned on, the camera is alternately switched between the ON state and the LOCK state.

S W + is a photometry switch, which is turned on by pressing the shutter button SB one step. SW2 is a release switch, which is turned on by pressing the shutter button SB two steps. 5WRE is a halfway rewind switch, which is a push switch that is turned on when forcibly rewinding the film. 5WsP is a sprocket signal generating switch, which is provided to detect the rotation of the sprocket l- which rotates in conjunction with the running of the film, the details of which will be explained in detail with reference to FIG. SW is a winding detection switch, which is turned ON when winding of one frame of film is completed. 5WRc is the back cover opening/closing switch, and it turns ON10 F in conjunction with the opening/closing operation of the camera's back door.
F is given. SWMoDE is an exposure mode change-over switch, and is a push switch that is normally OFF and switches the camera's shooting mode each time it is turned ON. SW; ELF is a self-timer switch, which is normally OFF and is a push switch that switches between self-timer mode and normal shooting mode each time it is turned ON. SWH,s is a switch for switching between high speed mode and silent mode,
Consists of a slide switch.

One end of each of these switches is all grounded, and the other ends are all connected to the input port of the CPU 200 and pulled up inside the CPU 200. Therefore, the other end of each switch is at the "High" level when the switch is OFF, and is at the 'Lo11' level when the switch is ON, and by detecting this level, the CPU 200 determines whether each switch is 0N10FF. It is something that

Reference numeral 400 denotes an LCD panel, which is provided at the top of the camera body and is used to display the number of films, shooting mode, etc. Details of the display contents will be described later with reference to FIG. [, the common electrode of the CD panel 400 is the CPU
The segment electrode is connected to the segment terminal SEG of the CPU 200. Since the LCD panel 400 is driven by voltage divided into multiple stages, the bias voltage for this is applied to the CPU 2.
00, the bias voltage generation circuit 42Q
It is connected to PU200.

FIG. 4 illustrates a specific circuit configuration for switching the motor 260 between high speed mode and low speed mode. In the motor control circuit 262, a series circuit of transistors Tr, Tr, and a transistor Tr, are connected between the battery voltage VEE and the earth line GND.

Tr< series circuits are connected in parallel, and the connection point of transistors Tr, , Tr, and transistor Tr3゜T
A motor 260 is connected between the connection points of r<. Each transistor T r I-T r 4 has a motor 2
Sixty diodes for back electromotive force bypass are connected in antiparallel. The outputs of the buffer amplifiers AP and AP4 are input to the bases of the transistors T r + to Tr4, respectively.

The CPU 200 is provided with registers R1 to R5 for motor control. The outputs of registers R1 and R4 are NAND
The outputs of registers R2 and R3 are connected to one input of the gates hNA, , NA, and the outputs of the AND gates 1'' A N 2 ,
Connected to one input of AN3. The output of the register R5 is used as the control input of the pulse generator PG, and the oscillation output of the pulse generator PG is input to the NAND gates NA, , NA.
, and the other input of the AND gate AN2°AN3. NAND gate N A l, N A
The output of 4 is the buffer amplifier AP.

AP, PNP type transistor Tr1. Tr.

becomes the control signal for AND gate AN2. AN! The output becomes a control signal for NPN transistors T r , T r 2 via buffer amplifiers AP, , APj.

First, in high-speed mode, the output of register R5 is "High"
level, and at this time the output of the pulse generator PG is “H”.
Therefore, register R remains at “high” level.
Depending on the status of 1 to R4, the motor 260 rotates forward, reverse, or
Brake and stop control are performed. When operating the motor 260 in forward rotation, the outputs of registers R1 and R3 are
High” level, the outputs of registers R2 and R4 are “Lo” level.
w” level, and only transistors Tr, Tr3 are set to O.
When the motor 260 is set to N and the current flows in one direction to cause the motor 260 to operate in the reverse direction, registers R1 and R3 are set.
The output of transistor Tr2.T is set to "Low" level, the output of registers R2 and R4 is set to "HiFih" level, and
When applying the brakes to the motor 260 by turning on only R, and applying a brake to the motor 260, the outputs of the registers R2 and R3 are set to the 'High' level, and the outputs of the registers R1 and R4 are set to the 'Low' level. level, turn on only transistors Trz and Trz, short-circuit both ends of the motor 260 via the earth line GND, and
Apply braking to the inertial rotation of. When the motor 260 is stopped, all the outputs of registers R1 to R4 are set to 'L'.
ow” level, and the transistors T r + to T r
Turn off all 4.

Next, in the mute mode, the output of register R5 is “Loud”
level, and at this time the output of the pulse generator PG is 'H.
This is a pulse output that alternately repeats the "high" level and the "lowI+" level. Therefore, the effective value of the current flowing through the motor 260 during the above-mentioned normal rotation operation or reverse rotation operation is reduced, the motor 260 rotates at a low speed, and the noise level is reduced.

FIG. 5 is a diagram illustrating the structure of the sprocket signal generation switch 5WsP. 300 is a sprocket for feeding the film. 310 is a sprocket pawl that feeds the film by meshing with the perforations of the film. A sprocket signal contact base plate 320 is made of a conductive member connected to the ground line GND of the camera body circuit 100, and also serves as a bearing for the sprocket 300. 330 is a rotating board for sprocket signal generation, and a zero rotation board 3 that rotates in conjunction with the sprocket 300.
The radial conductive patterns of the 0-rotation board 330, on which conductive patterns and insulating patterns are alternately arranged radially on the surface of the board 330, are connected to the circuit 10 in the camera body via the contact base plate 320.
It is grounded to the ground line GND of 0. Reference numeral 340 denotes a brush for generating sprocket signals, which contacts the surface of the rotating board 330 for generating sprocket signals. 321.
322 is a boss for positioning the brush 340, the surface of which is coated with an insulating film. An insulating sheet 350 is interposed between the contact base plate 320 and the brush 340 in order to insulate the two. 360 is a suppressing member for fixing the brush 340 to the contact base plate 320, and is made of an insulating member. Brush 340 and insulation sheet 3
50 and the pressing member 360 are respectively provided with positioning holes 341, 342, 351, 352, 361, and 362 that are inserted into the positioning bosses 321, 322 of the contact base plate 320. The terminal 343 of the brush 340 is connected to the pressing member 3
60 is inserted into the elongated hole 363, and the CPU is connected via the lead wire.
Connected to 200 input ports. The pressing member 360 includes a six 364 into which a screw 370 is inserted, and this screw 370
The pressing member 360 is fastened to the contact base plate 320 by screwing it into the screw hole 324 of the contact base plate 320.

When the film is normally fed, the sprocket 300 and the rotating board 330 will rotate, and as a result, the brushes 340 will alternately contact the radial conductive pattern and the radial insulating pattern of the rotating board 330, and the ground line The tin rocket signal generation switch 5WsP is configured by 0 or more that repeats ○N10 FF F against.

6 to 8 are diagrams illustrating the display contents of the LCD panel 400. Reference numeral 401 is an ON display indicating that the power of the camera is ON, and in order to clearly distinguish it from other display segments, only this display segment has a negative pattern. 402 is a self-timer mark. Each time the self-timer switch 5Wset-p is pressed, the self-timer mark is displayed and erased repeatedly, and the camera operates in the self-timer mode only when the self-timer mark is displayed.

403 to 405 indicate the automatic exposure mode of the camera, and 40
3 indicates standard program mode P, 404 indicates high speed program mode PH1405 indicates low speed program mode PL, exposure mode changeover switch SWMO[
) Each time E is pressed, P, pH1P, and the like are selected and displayed in sequence. 406 is a film counter. 407 is a cartridge mark, which is displayed when a film cartridge is loaded. A film mark 408 is displayed when the film is loaded and wound normally.

FIG. 9 shows the CPU 200 in the camera body internal circuit 100.
and an interchangeable lens internal circuit 520 in the interchangeable lens 500.
The details of the communication circuit are shown.

The CPU 200 has a serial clock output terminal S for communicating with the circuit 520 inside the interchangeable lens. K, a serial input terminal SIN, and a chip select terminal CS. The serial clock output terminal ScK is a terminal that outputs a serial clock for serial communication between the CPU 200 and the interchangeable lens internal circuit 520. Serial data input terminal S
IN is a terminal for reading into the CPU 200 serial data transmitted from the interchangeable lens internal circuit 520 to the CPU 200 in synchronization with the serial clock. The chip select terminal C8 is a terminal through which the CPU 200 outputs a selection signal for serial communication with the circuit 520 inside the interchangeable lens. After this chip select terminal is set to "L, om" level, a serial clock is output from the serial clock output terminal SCK, and serial communication is performed. When the communication is completed, the chip select terminal C8 becomes “High”
level.

The electrical contact group 100 for signal communication provided on the mount of the camera body includes electrical contacts 111 to 1, 15, and the electrical contact group 510 for signal communication provided on the mount of the interchangeable lens 500 includes electrical contacts 111 to 1,15. including contacts 511 to 515;
111.511 is a contact point for supplying power from the camera body internal circuit] and OO to the interchangeable lens internal circuit 520. The electric contact 111 has a constant voltage ■DD of the power supply circuit 130.
is supplied via a current limiting resistor 134. This resistor 134 is for protection when the power supply contact 111 is short-circuited to another contact or a ground line externally. 1
12.512 is an electrical contact for transmitting the serial clock output from the serial clock output terminal SC'K. 113.513 is serial data input terminal S
This is an electrical contact for transmitting serial data input to IN. 114.514 is chip select terminal C8
The electrical contact 6115.515 for transmitting the selection signal output from the camera main body circuit 100 and the interchangeable lens circuit 520 is a common ground line.

Next, the configuration of the interchangeable lens circuit 520 will be described. 521 is a zoom encoder, and an interchangeable lens 500
is a zoom lens, the focal length information is converted into digital information in conjunction with the zoom ring and is transmitted to the address circuit 523. 522 is a decoder, and the CPU 20
The serial clock output from the zero serial clock output terminal Sc is counted and transmitted to the address circuit 523. The address circuit 523 is connected to the zoom encoder 52
1 and the output of the decoder 522, the address for accessing the data in the ROM 524 is designated. R.O.
M524 stores data specific to the interchangeable lens 500. 525 is a parallel-serial conversion circuit,
The 8-bit parallel signal read from the ROM 524 is converted into an 8-bit serial signal, and the serial data input terminal SIN of the CPU 200 is synchronized with the serial clock output from the serial clock output terminal Sc.
Send as serial data to

FIG. 10(a) is a circuit diagram of an input/output circuit for serial communication of the CPU 200, and FIG. 10(b) is an operating waveform diagram thereof. 5CKC is a serial clock control register. Serial clock control register 5C
When KC is set to the "High" level, the output of the inverter Gll becomes the "Low" level, and the N-channel MOS transistor Q in the output section is turned off.

At the same time, the output of inverter G12 becomes “High”.
level, and the output buffer BP becomes enabled. Serial clock control register SCK
When C is brought to the "Low" level, the N-channel MOS transistor Q in the output section goes into the N state, pulls down the serial clock output terminal Sc, and outputs the output buffer BP into a high impedance output state.

The serial counter 5CTR consists of a 3-bit counter, and receives a serial clock φ (32.8K Hz) from a clock pulse generator provided inside the CPU 200.
). When eight serial clocks Φ are counted, a carry pulse is generated and a serial interrupt is applied to the CPU.

This serial clock φ is input to the serial counter 5CTR at the same time as the serial clock output terminal S. It is sent to the external circuit (serial communication partner) through .

Serial register SRG performs a shift operation in synchronization with serial clock φ, takes in serial data d0 to d7 sent from an external circuit (serial communication partner), and transfers it to CP via serial data register SDR.
In contrast to the 0 output to the pass line of U200, CPU20
The parallel data set in the serial register SRG is sent from the pass line 0 to the external circuit (serial communication partner) in synchronization with the serial clock φ as serial data a0 to a.
, but the latter is not used for reading lens data.

FIG. 11 is a diagram illustrating program lines of three program modes P, PH, and PL used in this embodiment. As is well known, the program line has the aperture value Av expressed in apex value on the vertical axis and the exposure time Tv on the horizontal axis, and the aperture value Av and exposure time T for the exposure value Ev.
In the 0 diagram showing the combinations of v, FNO is F
It means the number, and S, S means the shutter speed. As is clear from FIG. 11, in the high-speed program mode PH, a higher shutter speed is selected than in the normal program mode P for the same exposure value Ev within the effective range of the program line. It is suitable for In addition, in the low-speed program mode Pl-, within the effective range of the program, a slower shutter speed is selected than in the normal program mode P for the same exposure value EV, and it is difficult to depict the moving subject. It is suitable for

FIG. 12 is a flowchart showing the main program of the CPU 200. The CPU 200 of this embodiment has a sleeve mode for power saving. When entering this sleep mode, the oscillation of the system clock of the CPU 200 is stopped and the contents of the memory are held.

From this sleep mode, a timer interrupt is applied to the CPU 200 to restart oscillation of the system clock and return to the normal mode.

A timer interrupt is applied to the CPU 200 approximately every 250 m5ec, and the CPU 200 starts operating in the normal mode from #2.

In #2, the state of the input port connected to the main switch SW is checked. #4 is the main switch SWM
It is determined whether or not is turned on.

If the main switch SWM is not turned on in #4, the flag F2 is determined in #6. Flag F2 is a main switch flag, which is set to 1 when the camera is set to the operable state by operating the main switch SWH.
Set to 0 when set to LOCK state.

If the flag F2 is O in #6, it means that it was in the LOCK state last time and the main switch SWM has not been operated this time, so it continues to be left in the L, OCK state. It is judged that. Therefore, in order to set the time for the sleeve mode without performing any processing, the interrupt timer T is set to 25 Om5ec in #20, and the interrupt timer T is started in #22 to enter the sleeve mode again. When not using the camera,
Process #2, #4, #6, #20, #22 for about 4 hours.
It will be repeated with z.

If the main switch flag F2 is 1 in #6, it means that it was in the ON state last time and the main switch SWM is not turned on this time, so it continues to be used in the ON state. It is judged as a thing. Therefore, in order to determine the state of the shutter forceps SB, #8
0N10FF of the photometry switch SWl is determined. #8
If the photometry switch S W + is turned on, the process moves to #34 in FIG. 13 to perform photometry operation. If the photometry switch SWl is turned off in #8, then in #10 it is determined whether the halfway rewind switch 5WRE is ○N10FF. At #10, halfway rewind switch 5WRE is turned on.
If so, in order to enter a forced rewind operation,
The process moves to #74 in FIG. If the midway rewind switch SWpew is OFF in #10, it is determined in #12 whether the camera back switch SW, c is ON/OFF. #1
If the back cover switch 5WRc is turned on in step 2, an operation related to opening the back cover is performed, but since this operation is not related to the present invention, a description thereof will be omitted. If the back cover switch 5WRc is turned off in #12, subroutine 5UB-9 is called in #14 to perform exposure mode setting processing, subroutine 5UB-7 is called in #16 to perform self-timer mode processing, At #18, subroutine 5UB-IA (or 5UB-IB) is called to perform lens attachment/detachment determination and display processing, and at #20 and #22, interrupt timer T is set and started, and the sleeve mode is entered.

Next, when the main switch SWM is turned on in #4, it means that the photographer intends to switch the camera between the ON state and the LOCK state. In order to determine this, the flag F2 is determined in #24. If the main switch flag F2 is 0 in #24, it means that it was in the LOCK state last time, so in order to make it in the ON state this time, the flag F2 is set to 1 in #26, and the LCD is turned off in #28.
ON display 401 and shooting mode display 403 on panel 400
~405 is displayed and the normal ON state operation starts from #8. If flag F2 is 1 in #24, it means that it was in the ON state last time, so this time it is LOC.
In order to enter the K state, set flag F2 to 0 in #30, and
Step 2 turns off the ON display 401 and the photographing mode displays 403 to 405 on the LCD panel 400, and enters the normal LOCK state operation from #20 onwards.

Note that in this embodiment, when the camera is in the LOCK state, the lens attachment/detaching determination and display are not performed, but #32 and #6
If the program is changed to move to #18, subroutine #18 (5OB-IA (or 5UB-IB)) will be executed even when the camera is in the LOCK state, and the lens attachment/detachment determination and display will be performed.

Now, when the photometry switch SW1 is turned on in #8 while the camera is in the ON state and continues to be used, the process starts from #34 in FIG. 13 to perform photometry operation. In #34, the brightness of the subject is measured. Specifically, CP
A photometry command is given from the photometry circuit 220 from the photometry circuit 200, and object brightness information sent back from the photometry circuit 220 to the CPU 200 is read. In #36, subroutine 5UB-6 for reading lens data is called, and serial data is read from the interchangeable lens internal circuit 520 in the interchangeable lens 500. Based on the read result, in #38, it is determined whether the lens is attached or detached. I do.

When it is determined in #38 that the lens is properly attached, the number of shots is displayed by the film counter 406 in #40.In #42, the subject brightness information obtained in #34 and the information obtained in #36 are displayed. The photometric value is calculated from the lens data obtained. In #44, the exposure value Ev is determined from the photometric value Bv obtained in #42 and the film sensitivity value SV obtained from the DX contact 230, and the shutter speed Tv and aperture are determined from the program diagram in the selected program mode. Determine the value Av.

Next, when it is determined in #38 that the lens is not properly attached, a message indicating that the lens is not attached properly is displayed in #46.
In this embodiment, since a 7-segment type two-digit number display section is used as the film counter 406, only the center segment of each number display is displayed.
- is displayed to indicate that the lens is not attached properly.

Next, in #48, only the Tv value by actual aperture photometry is determined.

Proceeding from #44 or #48 to #50, it is determined whether the release switch SW is ON10FF. If the release switch SW2 is OFF in #50, it is determined in #52 whether the photometry switch SW is ON10FF. #52
If the photometry switch SW remains in the ON state, the process returns to #34 to repeat the photometry operation. If the photometry switch SWl is in the OFF state in #52, the interrupt timer T is set and started in #54 and #56, and the sleeve mode is entered. In this case, only the photometry operation was performed and no release operation was performed.

If release switch SW2 is turned on in #50,
In #58, flag FIO is determined. This flag F10 is a self-timer mode flag, which is 1 in the self-timer mode and 0 in the normal mode. #5
If the flag F10 is 1 at #8, it is the self-timer mode, so the self-timer (for example, 10 seconds) is set at #60.
After the timing operation is completed, the release operation of #62 is started. If the flag FIO is 0 in #58, it is the normal mode, so #60 is skipped and the release operation in #62 is immediately started. #62 has mirror control,
Performs release operations such as aperture control and shutter control. When the release operation is completed, the film counter 4 is
After incrementing the number of shots in 06 by one and calling subroutine 5UB-2 for shutter charging and film winding in #66, flag F5 is determined in #68. This flag F5 is a film winding end flag, which becomes 1 when the film reaches the final frame and a tensioned state of the film is detected, and becomes O when the film has not reached the final frame.

If the flag F5 is O in #68, the release switch SW and photometry switch SW1 are turned OFF in #70 and #72.
When both are turned off, #54 and #5
Step 6 sets and starts the interrupt timer T and enters the sleeve mode. If flag F5 is 1 in #68,
Since the film has reached the final frame and is in a tensioned state, in order to automatically rewind the film, subroutine 5 for film rewinding is executed in #74.
Call UB-3 and set interrupt timer T at #54 and #56.
Set and start, and enter sleeve mode.

Note that even if the film winding completion flag F5 is not determined to be 1 in #68, if it is determined that the halfway rewind switch SWR4 is ON in #10, as described above, the film rewinding flag F5 is set to 1 in #74. Subroutine 5U
B-3 is called and the film is rewound midway.

Next, each subroutine will be explained.

FIG. 14(a) is a subroutine 5UB-LA for lens attachment determination and display, and is #1 of the main program.
Called on 8. When this subroutine 5UB-IA is called, first, in #100, subroutine 5UB-6 for reading lens data is called, serial data is read from the interchangeable lens internal circuit 520 in the interchangeable lens 500, and the serial data is read. Depending on the result,
In steps #1 and 05, it is determined whether the lens is attached or detached. To determine whether the lens is incompletely attached, the CPU 200 checks the contents of the first data of the serial data read from the interchangeable lens 500 through serial communication, and determines whether the lens is properly attached or not. Check if communication has been made.

Among the multiple bytes of serial data sent from the lens, the first 8 bits are data for checking the lens attachment status, and are predetermined fixed data such as 0, which is expressed in binary code. te10
It is 101010. If the lens is attached correctly, the first data read should be 10101010, but if the lens is not attached or the connection is incomplete even if it is attached, the predetermined data will be 10101010. By detecting this, which is not accurate data, it is possible to detect incomplete attachment of the lens.

If it is determined in #105 that the lens is properly attached, the number of shots is displayed on the film counter 406 in #110, and the process returns (see FIG. 7(a)). If it is determined that the lens is not mounted properly, a display indicating that the lens is not mounted correctly is displayed in step #115, and the process returns (see FIG. 7(b)). As described above, since the numerical display section of 2 is used, only the center segment of each numerical display is displayed and "-1" is displayed to indicate a lens attachment failure.

FIG. 14(b) shows another subroutine 5UB-IB for lens attachment determination and display, which can be used in place of the above-mentioned subroutine 5OB-IA in #18 of the main program. This subroutine 5UB-I
When B is called, subroutine 5UB-6 for reading lens data is called in #100, serial data is read from the interchangeable lens internal circuit 520 in the interchangeable lens 500, and according to the read result,
In #105, it is determined whether the lens is attached or detached.If it is determined in #105 that the lens is attached normally, then in #11
At 0, the number of shots is displayed by the film counter 406 (see FIG. 8(a)), at #120 the flag F1 is set, at #125 the variable J is set to 8, and the process returns. Here, the flag F1 is a display switching flag when the lens is incompletely attached. When this flag F1 is 1, the film counter 406 indicates "-" when the lens is incompletely attached.
1" is displayed, and when the flag F1 is 0, the number of shots is displayed by the film counter 406 even if the lens is not fully attached. At #120, the flag F1 is set so that, although the lens is not currently in the incompletely attached state, the next time the lens becomes incompletely attached, "-1" is immediately displayed. Further, the variable J is a counter for determining the cycle at which the film counter 406 switches between displaying "-1" and displaying the number of shots when the lens is incompletely attached, and is initially set to J=8 here.

Now, if it is determined in #105 that the lens is not properly attached, then in #130 the display switching flag F1 is
Determine. If the flag F1 is set in #130, the film counter 406 indicates "--" in #135.
Display to notify the photographer that the lens is not properly attached. Then, in #140, the number of times counter J is decremented by one, and in #145, it is determined whether or not the number of times counter J has reached O. If the number counter J is not O in #145, the program returns and enters the sleeve mode in the main program. After that, if the lens continues to be incompletely attached, it will return from sleeve mode to normal mode every 250 m5ec and pass #135 and #140, passing #140 8 times. time, that is, when approximately 2 seconds have passed, the number counter J is set in #145.
It is determined that the value has become 0. At this time, the flag F1 for display switching is set to O in #150, the value of the number counter J is initialized to 8 in #125, and the process returns to the main program. Therefore, the next time the process passes through #130, it is determined that the flag F1 is O, so in #155, the film counter 406 displays the number of shots to notify the photographer of the number of shots. Then, in #160, the number of times counter J is decremented by one, and in #165, it is determined whether or not the number of times counter J has become 0. If the number counter J is not 0 in #165, the program returns and enters the sleeve mode in the main program. After that, if the lens continues to be incompletely attached, approximately 250 m5
Return to normal mode from three 1 mode every ec, #
155 and #160, and #160 is 8
When the #1
At 65, it is determined that the number of times counter J has become 0.

At this time, the flag F1 for display switching is set to 1 in #170, the value of the number counter J is initialized to 8 in #125, and the process returns to the main program. Thereafter, the same operation is repeated, and the film counter 406 displays "--" and the number of shots taken alternately at a cycle of about 2 seconds (see Fig. 8).
b) Therefore, the photographer can know the number of shots even when the lenses are not fully installed.

FIG. 15 shows a subroutine 5UB-2 for shutter charging and film winding, which is called at #66 of the main program. This subroutine 5UB-
When 2 is called, first, at #200, the motor 260 is energized to rotate normally, and shutter charging and film winding are started. As described above, this motor 260 is mechanically configured to perform normal rotation to charge the shutter and wind the film in parallel. #205
Now, reset the timer and start it.

This timer is a timer that determines the detection period of the sub bloget signal. At #210, it is detected whether or not a sprocket signal is generated from the sprocket signal detection switch 5Wsp. When the sprocket signal is not generated, the process proceeds to #215, and it is determined whether the timer reset and started in #205 has reached a time-up state. If there is no time-up condition, #21
Return to 0 judgment. When no sprocket signal is generated, the determinations in #210 and #215 are repeated.

If a time-up condition occurs at #215 without a sprocket signal being generated, it is determined that the film has been wound to the end or that there is some abnormality in the film feeding, and the motor 260 is stopped at #220, and the motor 260 is stopped at #220.
5, the flag F5 is set to 1 and the process returns. This flag F
5 is the film winding end flag as mentioned above,
It is set to 0 while the film is being fed normally, and set to 1 when the film is no longer being fed.

When #210 and #215 are repeated, before the time-up condition occurs in #215, #210
When it is determined that a sprocket signal has occurred,
At #230, the timer that determines the sprocket signal detection cycle is reset and started again. And #235
○N10FF of the winding detection switch SWw is determined. At #235, the winding detection switch S is turned OFF.
When it is determined that it is F, it is determined that the winding for one frame has not been completed yet, and the winding is performed at tJ! To continue, return to the determination in #210. When it is determined in 9235 that the winding detection switch SWv is ON, 1
It is determined that the film has been wound for one frame, the motor 260 is stopped in #240, and the film winding end flag F5 is set to 0 and the return is made in #245. Sprocket signals are to be generated, #210, #23o, #235
After passing through the loop eight times, the process proceeds to #24o and #245.

Figure 16 shows subroutine 5U for rewinding the film.
B-3 and is called at #74 of the main program. When this subroutine 5UB-3 is called, first, in #300, the motor 260 is energized to rotate in reverse,
Begin film rewind. As described above, this motor 260 is mechanically configured to rewind the film in the reverse direction. Next, in #305, the film winding end flag F5 is determined. If flag F5 is 1 in #305, it is determined that the film has been wound to the end or that there is some abnormality in the film feeding, and #
At 310, the automatic rewind timer is reset and started. Also, if flag F5 is O in #305,
Although the film is being wound in the middle, it is determined that the halfway rewind switch SW, A has been operated, and the timer for halfway rewinding is reset and started at #330. The time measured by the timer for automatic rewinding is set shorter than the time measured by the timer for rewinding in the middle. this is,
During automatic rewinding, the film is under tension, so as soon as you start rewinding the film, the sprocket 300 rotates in conjunction with the sprocket signal, which generates a sprocket signal. This is because it is short. On the other hand, when rewinding halfway, the film is not in a tense state, but is likely to be in a relaxed state inside the film cartridge.
Even after starting to rewind the film, the film continues to be wound tightly inside the film cartridge for a while, and then the film outside the film cartridge is wound into the film cartridge. Therefore, in the case of midway rewinding, even if film rewinding is started, a sprocket signal is not necessarily generated immediately, and it becomes necessary to lengthen the sprocket signal detection cycle.

#315 has sprocket signal generation switch 5Wsp
Detects whether or not a sprocket signal is generated. #320 when sprocket signal is not generated
The process proceeds to #310 or #330 to determine whether the timer reset and started has reached a time-up state. If the time is not up, #315
Return to the judgment. When the sprocket signal is not generated, #315 repeats the determination of #315 and #320.
When it is determined that a sprocket signal has occurred,
Returning to #305, the timer that determines the detection period of the sprocket signal is reset and started again in #310 or #330 depending on the value of the flag F5. If the sprocket signal is not generated and a time-up condition occurs at #320, it is determined that the film has been rewound to the end or that there is some abnormality in the film feeding, and the system returns to #325.
Stop the motor 260 and return.

Figure 17 shows a subroutine 5U for resetting and starting a timer that determines the sprocket signal detection cycle during automatic film winding or automatic film rewinding.
B-4, #205 and #230 in subroutine 5UB-2 for film winding, or # in subroutine 5UB-3 for film rewinding.
Called at 310. When this subroutine 5UB-4 is called, first in #400, the setting state of the high speed mode/silence mode changeover switch SWH/s is determined. When this selector switch 5W)(, 's is set to high-speed mode, the motor 260 rotates in high-speed mode, so the sprocket signal generation interval becomes shorter, and accordingly, the sprocket signal detection period needs to be set shorter. When the selector switch SWH/s is set to silent mode, the motor 260 rotates quietly in low speed mode, so the sprocket signal generation interval becomes longer.
Accordingly, it is necessary to set the detection period of the sprocket signal to be long.

Therefore, when the selector switch 5W)l,'s is set to high speed mode in #400, a short detection period Δb+ (for example, 300 m5ec) is initialized to the timer in #405, and the motor 260 is set to high speed in #410. Set to mode. When the selector switch SWH/s is set to the silent mode in #400, a long detection period ΔLs (for example, 15ec) is initially set in the timer in #415,
At #420, the motor 260 is set to low speed mode. In either case, a timer is started in #425 and the process returns.

FIG. 18 shows a subroutine 5UB-5 for resetting and starting a timer that determines the detection period of the sprocket signal when rewinding the film halfway, and is called at #330 in the film rewinding subroutine 5UB-3. # in this subroutine 5UB-5
Steps 500 to #525 are subroutine 5UB-
The same processing as steps #400 to #425 in Step 4 is performed. However, the detection periods ΔtH' and Δ1s'' set in #505 and #515 are
The period is six times (α>1, for example, α=3) longer than the detection periods ΔtH and Δ1s set in step 415.

This applies both in high speed mode and in silent mode.
When rewinding the film midway, the film is not in a tensioned state, but is likely to be in a relaxed state inside the film cartridge, so as mentioned above, compared to the case of automatic film rewinding, This is because it is necessary to lengthen the detection cycle.

FIG. 19(a) is a subroutine 5UB-6 for reading lens data, which is #36 of the main program or subroutine 5UB-IA (or 5OB-IB).
It is called at #100.

When this subroutine 5UB-6 is called, first,
At #600, set the address pointer M of the RAM in the CPU 200 to the starting address of serial data storage - 3.
Next, flag F4 is reset in #605. This flag F4 is a serial communication completion flag, and the CPU 200
It becomes 1 when serial communication with the inner path 520 for one byte is completed, and becomes O when serial communication is not completed.

At #610, the serial counter 5CTR is set to an initial value of 8 in order to count one byte worth of clocks. #615 sets the chip select terminal C8 to “Low”
'' level. As a result, the interchangeable lens internal circuit 520
is selected, 8-bit parallel data is read from the ROM 524, converted into serial data by the parallel-serial conversion circuit 525, and output to the serial clock output terminal S. Every time the serial clock is input from K, it is read into the CPU 200 as serial data bit by bit and stored in the serial register SRG in the CPU. In #620, serial clock control register 5CKC is set to 1.

As a result, a serial clock is output from the serial clock terminal SO. In #625, the serial communication completion flag F4 is determined. Serial communication completion flag F4 is 1
Otherwise, the determination in #625 is repeated. Immediately after starting serial communication, the flag F4 is O, so the determination in #625 is repeated until the flag F4 becomes 1. The CPU 200 has a built-in serial counter 5CTR that counts the number of serial clocks given to the circuit 520 inside the interchangeable lens.
Decrement CTR by one.

This serial counter 5CTR has an initial value of 8 in #610.
8 in the interchangeable lens internal circuit 520.
If we give 5 serial clocks, the serial counter 5
The value of CTR becomes zero. At this time, a serial interrupt is applied to the CPU 200.

The contents of this serial interrupt are shown in FIG. 19(b) and will be explained. First, in order to stop outputting the serial clock at #650, the serial clock control register 5CK is
Let C be O. At #655, the 8-bit serial data accumulated in the serial register SRG is sent to the CPU 20.
Next, #6 is transferred as parallel data to the address specified by the address pointer M in the RAM in 0.
60, the address pointer is incremented by one, the serial communication completion flag F4 is set to 1, and the serial counter 5 is incremented.
The initial value 8 is set in CTR again, and the process returns to the step where the serial interrupt occurred, that is, #625.

Since the serial communication completion flag F1 is 1 in #625, the process advances to #630 and the serial data counter N is
Decrement by one. The serial data counter N is a counter for specifying how many pieces of 1 byte of serial data are to be read, and is set in advance before subroutine 5UB-6 is called. Subroutine 5UB-IA (or 5UB-IB) 4 for lens attachment detection
In step #100, only the first byte of data needs to be read, so N=1 is initialized and subroutine 5OB-6 is called.

Also, in #36 of the main program, the following #42
Since various lens data are used in this step, the number of data required for the serial data counter N is initially set and subroutine 5UB-6 is called.

In #635, it is determined whether the serial data counter N has reached 0 or not. If the serial data counter N is not 0, set flag F4 to 0 in #636 and #620.
If the serial data counter N is 0 in #635, it means that the required number of bytes of serial data has been read, so the chip is read in in #640. Select terminal C
8 to the "High" level, communication with the interchangeable lens internal circuit 520 is terminated and the process returns.

FIG. 20 shows subroutine 5UB-7 for self-timer mode setting processing, and is #16 of the main program.
is called. When this subroutine 5UB-7 is called, first in #700 the self-timer switch SW is
Determine ON10 FF of LP on day s. If the self-timer switch 5WsaLy- is turned off in #700, the process returns with the flag F9 set to 0 in #705.

The flag F9 is a self-timer switch flag, and becomes 1 if the self-timer switch SWs LF is in the ON state, and becomes O if the self-timer switch SWs LF is in the OFF state. If the self-timer switch SWs LF is turned on in #700, the flag F9 is determined in #710. If flag F9 is 1 in #710, the self-timer switch is 5WsF both last time and this time! Since LF is ON8:[, the process returns without switching between self-timer mode and normal mode. #710 flag F9
If is O, the previous self-timer switch 5WsE
Since LF was in the OFF state, #7
15, the flag F9 is set to 1. Further, the flag FIO is inverted in #720. This flag FIO is a photographing mode switching flag, and becomes 1 in the self-timer mode and 0 in the normal mode. In #725, flag FIO is determined. If the flag FIO is 1 in #725, it is the self-timer mode, and the process returns with the self-timer mark 402 on the LCD panel 400 in the display state in #730. #725 flag FIO
If is 0, it is the normal mode, so in step #735 the self-timer mark 402 on the LCD panel 400 is turned off and the process returns.

Figure 21 shows subroutine 5 for exposure mode setting processing.
This is UB-9 and is called in #14 of the main program. When this subroutine 5UB-9 is called,
First, in #900, ON10FF of ooE is determined for the exposure mode changeover switch SW.

#900 turns on the exposure mode switch SWMoD
If so, in step #905, the mode counter I is incremented by one (it cycles as 1→2→3→1, etc.).

If the mode counter I=1 in #910, it is determined that the normal program mode is selected, and the process proceeds to #91.
At step 5, the normal program mode display 403 on the LCD panel 400 is returned to the display state. If the mode counter ■≠1 in #910, it is determined that either the high-speed program mode or the low-speed program mode is selected.2 If the mode counter I = 2 in #920, the high-speed program mode is selected. It is determined that this is the case, and the process returns with the high speed program mode display 404 on the LCD panel 400 in the display state in step #925. #
If the mode counter I=3 at 920, it is determined that the low speed program mode is selected, and the L is set at #930.
Slow program mode display 405 on CD panel 400
Returns as the display state.

Note that in #44 of the main program, the mode counter I is read to determine the currently selected program mode.

In this embodiment, since a flag for storing the state of the exposure mode switch SWMoDE is not used, if the exposure mode switch SWMoDE is held down, approximately 250
The exposure mode is switched in the above order every m5ec. Of course, the above subroutine 5UB-7
It is also possible to provide a flag similar to the flag F9 in , so that the mode is switched once each time ooE is pressed on the changeover switch SW.

Next, two modified examples of the subroutine 5UB-3 for rewinding the film will be illustrated. In the following modification, it is assumed that there is no switch SWH/ for switching between high speed mode and silent mode.

Figure 22 shows subroutine 5UB- for rewinding the film.
3A, and can be used in place of subroutine 5UB-3. In this subroutine 5UB-3A, #310 in subroutine 5UB-3 is replaced with
Steps 311 to #313 are used, and steps #331 to #333 are used in place of #330.

In #311, turn on the rewind switch 5WRP:w
10 Determine FF. If the midway rewind switch 5WRE is turned off in #311, subroutine SUB-4A is called in #312 to automatically rewind the film in high-speed mode, and the midway rewind switch SWRεW is turned on in #311. If so, subroutine 5UB-4B is called in #313 to automatically rewind the film in the silent mode.

#331 to #333 are similar to #311 to #313, and in #331, the rewind switch 5WREW is set to 0N1.
Determine 0FF, and if it is OFF, call subroutine 5tJB-5A in #332 and rewind the film midway in high-speed mode; if ON, call subroutine 5UB-5B in #333 and rewind the film midway in silent mode. Perform rewind.

Therefore, when this subroutine 5UB-3A is used, the rewind switch S
W, E! , the film is rewound in the silent mode only during the period of the ON operation.

Next, FIG. 23 shows subroutine 5 for film rewinding.
This is UB-3B and can be used in place of subroutine 5OB-3. In this subroutine 5UB-3B, steps #371 to #373 are used in place of #310 in subroutine 5UB-3, and steps #330
Steps #381 to #383 are used instead. Comparing with the above-mentioned subroutine 5UB-3A, instead of steps #311 and #331 for determining ○N10 F F of the rewind switch SWR A, flag F is used.
The difference is that steps #371 and #381 for determining 6 are provided. In addition, the rewind switch 5
Steps #340 to #360 of inverting the flag F6 each time WREW is turned ON are performed from #315 to #305.
The difference is that it is inserted in the loop that returns to .

In #340, the midway rewind switch SWREw is 0N1.
Determine 0FF. #340 halfway rewind switch S
If the WR signal is in the OFF state, the flag F7 is set to O in #345. This flag F7 is an intermediate rewind switch flag, and is an intermediate rewind switch 5WRI! w is ON
It is set to 1 if it is in the state, and set to O if it is in the OFF state. If the halfway rewind switch 5WRE is in the ON state in #340, the flag F7 is determined in #350. #35
0 and flag F7 is 1, halfway rewind switch S
Since WR i continues to be in the ON state, the film rewind mode is not switched. #3
If the flag F7 is 0 at step 50, it means that the midway rewind switch 5WRa was in the OFF state last time and is now in the ON state. Set to 1. Flag F6 is a film rewind mode flag, #371 or #
381 is used to switch between high speed mode (#372 or #382) and silent mode (#373 or #383).

When the flag F6 is 0, the high speed mode is selected, and when the flag F6 is 1, the silent mode is selected. This subroutine 5UB
When -3B is called, flag F6 and flag F7 are first set to 0 in #302, so when film rewinding starts, the film is rewound in high speed mode at first, but if the photographer Rewind switch SWR
When Ew is turned ON once, it switches to the mute mode, and when it is turned ON again, it switches back to the high-speed mode, and in the same way, each time the halfway rewind switch SW□ is turned ON. The film rewind mode alternately switches between high-speed mode and silent mode.

[Effects of the Invention] As described above, the present invention provides electric film winding and/or
Or, for cameras equipped with an electric rewind device, it is now possible to switch between high-speed mode and silent mode, so the photographer can manually increase the film feeding speed or adjust the film feeding speed depending on the shooting situation. It is possible to reduce noise, and has the effect of satisfying either the need for faster film feeding or quieter film feeding depending on the shooting situation.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the basic configuration of the present invention, Figure 2 (
a) is a plan view of a camera as an embodiment of the present invention, figure <b> is a front view of the same as above, FIG. A circuit diagram of the motor drive circuit used in the camera, Fig. 5 is an exploded perspective view of the switch for generating a subrogate signal used in the above camera, Fig. 6 is a front view of the LCD panel used in the above camera, Fig. 7 (a) , (b) and Figure 8 (a), (b)
is an explanatory diagram showing the display contents on the same LCD panel as above,
Figure 9 is a block circuit diagram of the communication circuit between the camera and the interchangeable lens, Figure 10 (a) is a circuit diagram of the signal input/output circuit of the CPU used in the above, and Figure 10 (b) is an operating waveform diagram of the same. , FIG. 11 is a program diagram showing program lines used in the above camera, and FIGS. 12 to 23 are flow charts showing the operation of the same camera. 1 is a motor, 2 is a motor drive circuit, 3 is a switch, and 4 is a mode switching means.

Claims (4)

[Claims] (1) In a camera equipped with an electric film winding and/or rewinding device, select a high-speed mode in which the film feeding motor rotates at high speed, or a silent mode in which it rotates at a low speed to reduce film feeding noise. A camera characterized in that it is provided with a variable speed motor drive circuit, a switch for switching between high speed mode and silent mode, and mode switching means for switching between high speed mode and silent mode according to the operation of the switch. Electric drive. (2) The switch for switching between the high speed mode and the silent mode is a slide switch, and the mode switching means switches between the high speed mode and the silent mode according to the operating position of the slide switch during the film winding and/or film rewinding sequence section. The electric drive device for a camera according to claim 1, characterized in that it is means for selecting. (3) The switch for switching between the high-speed mode and the silent mode is a push switch that also serves as a rewind button, and the mode switching means is operated while the rewind button operation output is being obtained during the film rewind sequence section. 2. The electric drive device for a camera according to claim 1, further comprising a means for selecting a silent mode only when the camera is in use, and selecting a high speed mode during normal times. (4) The switch for switching between the high speed mode and the silent mode is a push switch that also functions as a rewind button, and the mode switching means mutes the sound every time the rewind button operation output is obtained during the film rewinding sequence section. 2. The electric drive device for a camera according to claim 1, further comprising means for switching between a mode and a high speed mode.