JP3089488B2 - Camera control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a control device for a camera having an electrically rewritable nonvolatile memory E ² PROM.

[0002]

2. Description of the Related Art A first frame set in which a film of a patrone is pre-wound on a spool by loading the film, and the film is wound on the spool, and then the film is rewound to the patrone by a predetermined length in order to set the first photographing frame. In the so-called pre-winding type camera, the battery has been pulled out or pulled out for some reason during the pre-winding or the first frame setting, or the pre-winding operation or the first frame setting operation was stopped halfway due to the consumption of the battery. In such a case, when the battery is reloaded, the film in the middle of the preliminary winding or the first frame setting is rewound to the cartridge without continuing the preliminary winding operation or the first frame setting operation.

[0003]

As a result, the loaded film cannot be reused, and a new film must be loaded. This causes not only waste of the film but also operation such as reloading the film. Is required, and there is a trouble in operation.

[0004] The present invention has been made based on the above-described viewpoint, and an object of the present invention is to perform a pre-winding operation or a first frame setting when a battery is pulled out or pulled out during a pre-winding or a first frame set or when the battery is consumed. It is an object of the present invention to provide a camera control device capable of continuing the preliminary winding operation and the first frame setting operation by reloading the battery when the operation is stopped halfway, preventing the film from being wasted and eliminating the troublesome operation surface. .

[0005]

According to the present invention, preliminary winding of the patrone film on the spool is started while counting the number of photographic films that can be taken by closing the camera back cover, and the patrone film is wound on the spool. Preliminary winding means for ending the preliminary winding by completely winding up, and starting the first frame set for setting the first photographing frame at the end of the preliminary winding, and rewinding the film to the patrone by a predetermined length, thereby starting the first frame. First frame set means for ending the set,
An electrically rewritable nonvolatile memory E ² PROM,
The first rewriting means for writing the preliminary winding signal to the E ² PROM by the normal start of the preliminary winding and erasing the preliminary winding signal at the end of the preliminary winding; writing a second rewriting means for updating the write the number of recordable images per counting the number of sheets the E ² PROM, a Fast <br/> preparative frame set in the signal at the start of the first frame set to the E ² PROM ,
A third rewriting means for erasing the signal during the first frame set at the end thereof, and when the battery is exhausted during the preliminary winding or the first frame set and the battery is reloaded after the preliminary winding or the first frame set is stopped halfway. If the preliminary winding means does not hold the number of shootable images when the preliminary winding is stopped, the E ² PR
Using the number of recordable images stored in the OM, the pre-winding signal is kept written to drive the pre-winding means, and the first frame set signal is written By driving the first frame setting means, the above object is achieved by a camera control device having a control means for continuing the preliminary winding or the first frame setting when reloading the battery.

[0006]

When the preliminary winding is performed by the preliminary winding means,
When the pre-winding starts normally, the first rewriting means becomes E
With writing auxiliary wound in the signal to ² PROM, the second rewrite means for updating write number of recordable film in response to the count to the number of images by the preliminary winding means E ² PROM. The pre-winding means completes the pre-winding by completely winding the film of the cartridge on the spool, and at the end of the pre-winding, the first rewriting means erases the pre-winding signal written. The first frame set means starts the first frame set for setting the first photographing frame at the end of the preliminary winding, and ends the first frame set by rewinding the film on the cartridge by a predetermined length. Third rewrite means writes the first frame set in the signal in E ² PROM at the start of the first frame set, erases the first frame set in the signal written in the termination. If the battery is pulled out or pulled out during the preliminary winding or the first frame set, or if the battery is exhausted due to the exhaustion of the battery and the preliminary winding or the first frame set stops halfway,
The pre-winding signal or the first frame setting signal remains stored in the E ² PROM. When the battery is reloaded, the control unit determines that the number of images that can be taken when the preliminary winding is stopped is not held by the preliminary winding unit.
^{2 The} preliminary winding means is driven by using the number of recordable images stored in the PROM to keep the pre-winding signal written, and the signal during the first frame setting is kept written. By driving the first frame setting means, the preliminary winding or the first frame setting is continued.

[0007]

FIG. 2 is a block diagram showing an embodiment of the present invention.

In FIG. 2, reference numeral 1 denotes a microcomputer, which includes an on / off signal from a main switch 2, an on / off signal from a back cover switch 3, and a one-frame pulse from a one-frame pulse generating circuit 4. The battery check information from the battery check circuit 5 and the reset signal from the automatic reset circuit 6 are input, and the microcomputer 1 drives the battery check circuit 5, the film feed circuit 7, Rewritable nonvolatile memory E ² PRO
The rewriting / reading of M8 and the display device 9 are controlled. Reference numeral 10 denotes a camera battery which supplies power to the film feeding circuit 7 and the like, and a regulator 1
1 and microcomputer 1 and E ² PROM
8 is supplied with power.

The main switch 2 is linked to the opening and closing of a lens barrier, for example, a cover of a photographic lens, and sends an ON signal to the microcomputer 1 when the lens barrier is opened. The back cover switch 3 is linked with opening and closing of the back cover of the camera, and sends an ON signal to the microcomputer 1 when the back cover of the camera is closed. The one-frame pulse generation circuit 4 generates a one-frame pulse each time the film is fed for a predetermined length based on the detection of the perforation of the film, and supplies the pulse to the microcomputer 1. The battery check circuit 5
The battery 10 is connected in parallel to the battery 10 of the camera, and provides the microcomputer 1 with battery check information indicating whether or not the voltage of the battery 10 is higher than a predetermined voltage in response to a request from the microcomputer 1. The predetermined voltage is experimentally determined based on a voltage level at which film feeding cannot be performed normally. Automatic reset circuit 6
Is connected to the battery 10 via the regulator 11, and supplies a reset signal to the microcomputer 1 when the battery 10 is loaded. As is well known, when the battery 10 is removed, the microcomputer 1 is configured so that the power is backed up for a short time by a backup capacitor (not shown). If the battery 10 is reloaded within this time, the microcomputer 1 automatically operates. The reset signal is not supplied from the reset circuit 6. The film feed circuit 7 drives the film feed motor 12 forward / reverse under the control of the microcomputer 1.
The display device 9 displays the number of films under the control of the microcomputer 1.

The microcomputer 1 has a well-known function of controlling the preliminary winding and the first frame set, and also, as will be described later, a preliminary winding signal indicating that the preliminary winding is being performed and a signal indicating that the preliminary frame is being set. E ^{2 of the} signal during the first frame set
Programming / erasing to PROM 8, and the number of images of the film to be counted during the preparatory winding E ² PROM 8
The battery 10 is removed during the preliminary winding or the first frame set,
If the battery 0 is exhausted and the preliminary winding or the first frame set is stopped halfway, the battery 10 is re-inserted, so that the preliminary winding signal, the first frame setting signal, and the number of recordable images of the E ² PROM 8 are obtained. It has a function to continue the preliminary winding and the first frame set. That is, the microcomputer 1 writes the preliminary winding signal in the E ² PROM 8 at the start of the preliminary winding, and updates and writes the number of photographic films that can be counted during the preliminary winding in the E ² PROM 8. The microcomputer 1 ends the preliminary winding when the film of the cartridge is completely wound on the spool, and erases the preliminary winding signal written in the E ² PROM 8 when the preliminary winding is completed. If the battery 10 is pulled out during the preliminary winding or the battery 10 is exhausted and the preliminary winding stops halfway, the preliminary winding signal remains stored in the E ² PROM 8.
When the battery 10 is loaded, the microcomputer 1 reads the preliminary winding signal in the E ² PROM 8 and the number of images that can be taken when the preliminary winding is stopped, and uses the number of images that can be taken when the preliminary winding is stopped. Continue preliminary winding. The microcomputer 1 writes the first frame set signal in the E ² PROM 8 at the start of the first frame set, and erases the written first frame set signal at the end. If the battery 10 is pulled out during the first frame set or the battery 10 is exhausted and the first frame set is stopped halfway, a signal indicating that the first frame is being set is sent to the E ² PROM 8.
When the battery 10 is loaded, the microcomputer 1 reads the signal during the first frame setting in the E ² PROM 8 and continues the first frame setting.

FIGS. 3, 4, 5, and 6 are control flowcharts of the configuration of FIG. 2. FIG. 3 is a diagram showing the operation of the switch including the main switch 2 and the back cover switch 3 and the loading of the battery 10 during the backup time. FIG. 4 is a control flow of the first frame set, and FIG. 6 is a control flow of a power-on reset that starts up when the battery 10 is loaded after the backup time has elapsed. The terminals a, b,
c is connected to the terminals a, b, c of the same reference numerals in FIGS. 3 and 5, and terminal A of FIG. 4 is connected to the terminal A of the same reference numerals in FIG. Hereinafter, the operation of the configuration in FIG. 2 will be described with reference to FIGS.

Now, assuming that the film is loaded and the camera back cover is closed and the back cover switch 3 gives an ON signal to the microcomputer 1, the microcomputer 1 starts the control of FIG. The pre-winding control shown in FIG. 4 is started after the presence / absence of a winding signal, the presence / absence of a first frame setting signal in step 21 and the state of the back cover switch 3 in step 22.

In step 23 of FIG. 4, the film feed motor 12 is driven to rotate forward to start winding the film from the cartridge to the spool, and in the next step 24, it is determined whether or not the preliminary winding has started normally. This determination is made based on whether or not a one-frame pulse is supplied from the one-frame pulse generation circuit 4 within a predetermined time after the start of the preliminary winding. After the film feed motor 12 is stopped, it enters the standby state. If one frame pulse is given, it is recognized that the preliminary winding has started normally, and the process proceeds to the next step 26. In step 26, a preliminary winding signal is written into the E ² PROM 8, and in the next step 27, a predetermined time is set in an internal timer and started. The predetermined time is set based on a time interval between the application of one frame pulse during the normal preliminary winding and the application of the next one frame pulse. In the next step 28, it is determined whether or not a predetermined time set in the internal timer has elapsed. If not, it is determined in the next step 29 whether or not one frame pulse has been given. If one frame pulse has not been given, the process returns from step 29 to step 28. If one frame pulse has been given, the internal timer is reset and started in the next step 30.
to go into. In step 31, it is determined whether or not the number of shootable images is zero. The number of shootable images is counted by an internal counter, and in this example, as described below, the number of shootable images is increased by giving x single-frame pulses from the single-frame pulse generation circuit 4 after the preliminary winding starts normally. Set to 1,
Thereafter, the number of shootable images is incremented by +1 each time y frame pulses are given. At the start of preliminary winding, the number of images that can be taken is 0, so the process proceeds from step 31 to step 32, where it is determined whether or not x one frame pulse has been supplied from the one frame pulse generation circuit 4. If the number of one-frame pulses has not reached x in step 32, the process returns to step 28, and if so, the next step 33 is entered. Then, after displaying on the display device 9 the current number of images in step 34, it returns the current number of images to E ² PROM 8 In the next step 35 writes, in step 28. When the number of recordable images is set to 1, the microcomputer 1
Goes through steps 28, 29, 30, 31 to step 36
, And it is determined whether or not y one frame pulse has been given. In step 36, if the number of one-frame pulses has not reached y, the process returns to step 28;
Step 7, the number of recordable images is incremented by +1 and the count of one frame pulse is reset.
The process returns to step 28 via 4,35. When the film is completely wound on the spool from the patrone, no one-frame pulse is given from the one-frame pulse generating circuit 4, so that the process proceeds from step 28 to step 38. In step 38, battery check information is fetched from the battery check circuit 5, and it is determined whether or not the battery 10 is at or above a predetermined voltage determined based on a voltage level at which film feeding cannot be performed normally. 10 enters the step 25 not more than the predetermined voltage, the predetermined voltage or more value, if the preparatory winding preliminary winding in written in E ² PROM 8 at step 26 enters step 39 recognizes that was successful After erasing the signal, the process proceeds to the first frame set in FIG. If the battery 10 is pulled out or pulled out during the preliminary winding, the preliminary winding signal is not erased in step 39, and if the preliminary winding is stopped during the preliminary winding due to the consumption of the battery 10, steps 28 and 3 are performed.
After going through steps 8 and 25, the standby state is established. Similarly, the erasing of the preliminary winding signal in step 39 is not performed.
When the preliminary winding is stopped halfway, the number of recordable images up to that point is stored in the E ² PROM 8.

In the first frame set shown in FIG. 5, first, at step 40, the film feed motor 12 is driven to rotate in the reverse direction to start the first frame set.
At step 1, the first frame setting signal is written into the E ² PROM 8, and at step 42, a predetermined time is set in the internal timer and the operation is started. In the next step 43, it is determined whether or not a predetermined time set in the internal timer has elapsed,
If it has not elapsed, it is determined in step 44 whether or not a one-frame pulse has been given. If the one-frame pulse has not been given, the process returns from step 44 to step 43. If the one-frame pulse has been given, the internal timer is reset and started in step 45, and then, step 46 is entered. Step 4
In step 6, it is determined whether or not z one-frame pulses have been given. If the number of one-frame pulses has not reached z, the process returns to step 43. To stop. Next, in step 48, the number of recordable images is displayed on the display device 9, and the next step 4
After erasing the signal during the first frame setting of the E ² PROM 8 in 9 , the standby state is set. If no one-frame pulse is given for a predetermined time or more, the process proceeds from step 43 to step 50, where the battery check information is fetched from the battery check circuit 5, and it is determined whether or not the battery 10 is at or above a predetermined voltage. If the battery 10 is at or below the predetermined voltage, the process proceeds from step 50 to step 51, in which the reverse drive of the film feed motor 12 is stopped, and then the standby state is set. If the voltage of the battery 10 is equal to or higher than the predetermined voltage, the process proceeds from step 50 to step 52 to stop the reverse rotation of the film feed motor 12, to display a feed error on the display device 9 in the next step 53 to prompt for repair, and
After erasing the first frame set in the signal of ² PROM 8, the standby state. Off § over strike frame middle battery 10 set is not performed erased first frame set in the signal of step 49 when or missing or unplugged, also when stopping in the middle of a first frame set by depletion of the battery 10 step 43,
After going through steps 50 and 51, the standby state is established. Similarly, the signal is not erased during the first frame set in step 49. The reason why the signal during the first frame set is erased in the case of a feeding error in step 53 is to prevent the camera system from starting from the first frame setting after repairing the feeding error.

Here, it is assumed that the preliminary winding is stopped halfway due to the battery 10 being pulled out during the preliminary winding, and the battery 10 is reloaded. If the battery 10 is loaded during the time when the power is backed up by the backup capacitor described above, the microcomputer 1
Is started, the presence / absence of a pre-winding signal is determined at step 20. Since the pre-winding signal is still being written in the E ² PROM 8, the process proceeds from step 20 to step 54 in FIG. . In step 54, after the film feed motor 12 is driven to rotate forward, the process proceeds to step 27 to continue the preliminary winding. In this case, since the battery 10 is loaded within the backup time, the number of images that can be taken when the preliminary winding is stopped halfway is maintained, and there is no problem. If the battery 10 is loaded after the elapse of the backup time, a reset signal is given from the automatic reset circuit 6 to the microcomputer 1 to start the power-on reset control of FIG. 6, and the initialization processing in step 55 of FIG. Through the setting process of the number of recordable images stored in the E ² PROM 8 in step 5
7, the presence / absence of the preliminary winding signal is entered. Since the preliminary winding signal is still written in the E ² PROM 8,
From step 57, the process proceeds to step 54 in FIG. 4 to continue the preliminary winding.

On the other hand, it is assumed that the first frame set is stopped halfway, such as when the battery 10 is removed during the first frame set, and the battery 10 is newly loaded. The microcomputer 1 starts the control of FIG. 3 when the battery 10 is loaded within the time when the power is backed up by the backup capacitor described above,
The flow proceeds to step 20 to determine whether or not there is a signal during the first frame set in step 21. Since the signal during the first frame set is still written in the EEPROM ^{2, the} process proceeds from step 21 to step 58 in FIG. . In step 58, after the film feed motor 12 is driven to rotate in the reverse direction, the flow advances to step 47 to continue the first frame setting. If the battery 10 is loaded after the elapse of the backup time, a reset signal is given from the automatic reset circuit 6 to the microcomputer 1 to start the power-on reset control of FIG. 6, and the initialization processing in step 55 of FIG. E ² PRO in Japan
After the setting process of the number of recordable images stored in M8 and the determination of the presence or absence of a signal during preliminary winding in step 57, the presence / absence of a signal during first frame setting is entered in step 59, and the signal during first frame setting is written into the E ² PROM8. Step 5
9 to step 58 in FIG. 5 to continue the first frame set.

When the main switch 2 is operated, an input process of an operation switch such as a release switch is performed in step 61 through the on / off determination of the main switch 2 in steps 20, 21, 22 and step 60 of FIG. After that, it enters the standby state. If the back cover of the camera is closed, the back cover switch 3 remains on and there is no change. Therefore, the process goes from step 22 to step 60, where the back cover of the camera is opened and the back cover switch 3 is turned off. Then, the process goes from step 22 to a well-known back cover opening process (not shown) to enter a standby state. When the main switch 2 is turned off, a standby state is established through a well-known main switch off process (not shown). If the preliminary winding signal or the first frame setting signal has not been written in the E ² PROM 8 by the power-on reset shown in FIG.
After going to 7, 59, it is determined whether or not the number of shootable images is 0 in step 62. If the number of shootable images is 0, step 63 is executed.
To perform power-on reset display, and to perform conventional power-on reset processing such as film roll-in processing that rolls up the film in the patrone. Then, power-on reset ends immediately if the number of recordable images is not zero. I do.

If the data of one frame pulse is further written in the E ² PROM 8, the control of the continuation of the preliminary winding and the first frame set can be performed with higher accuracy. Also, for an automatic rewind or auto rewind camera, a rewind signal is output at the start of rewind to E ^2.
It can be easily applied by writing to the PROM, erasing the rewinding signal at the end of the PROM, and continuing rewinding when the battery is removed during rewinding and then reloaded. it can.

[0019]

As described above, according to the present invention, the preliminary winding signal, the first frame setting signal, and the number of films that can be counted during the preliminary winding are set to E ²
Since the battery is depleted in the middle of the preliminary winding or the first frame set after writing to the PROM and the battery is reloaded after the preliminary winding or the first frame set is stopped halfway, the preliminary winding or the first frame setting is continued. Even if the battery is pulled out or pulled out during the pre-winding or the first frame setting, or the pre-winding operation or the first frame setting operation is stopped halfway due to the exhaustion of the battery, the re-loading of the battery causes the pre-winding operation or the first frame. It is possible to provide a camera control device that has an effect of continuing the setting operation, preventing the film from being wasted, and eliminating the trouble of the operation surface.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a configuration diagram showing one embodiment of the present invention.

FIG. 3 is a control flowchart of the configuration of FIG. 2, which is a control flowchart for starting up by operating a switch including a main switch and a back cover switch and loading a battery within a backup time.

FIG. 4 is a control flowchart of the configuration of FIG. 2 and is a control flowchart of a preliminary winding.

FIG. 5 is a control flowchart of the configuration of FIG. 2 and is a control flowchart of a first frame set.

FIG. 6 is a control flowchart of the configuration of FIG. 2, which is a control flow of a power-on reset that starts up when a battery is loaded after a backup time has elapsed.

[Explanation of symbols]

1 microcomputer 2 main switch 3 rear cover switch 4 one frame pulse generating circuit 5 the battery check circuit 6 automatic reset circuit 7 film feed circuit 8 E ² PROM 12 film feed motor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-201636 (JP, A) JP-A-62-257738 (JP, A) JP-A-1-113738 (JP, A) JP-A-2- 278244 (JP, A) JP-A-1-202729 (JP, A) JP-A-54-38121 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 17/00 G03B 1 / 60

Claims (4)

(57) [Claims] 1. Preliminary winding by winding a patrone film on a spool while counting the number of photographic films that can be taken by closing a camera back cover, and fully winding the patrone film on a spool. And a first frame set for starting a first frame set for setting a first photographing frame at the end of the preliminary winding, and ending the first frame set by rewinding the film to the cartridge by a predetermined length. Means, an electrically rewritable nonvolatile memory E ² PROM, and a preliminary winding signal is written into the E ² PROM when the preliminary winding starts normally, and the preliminary winding signal is written when the preliminary winding ends. First rewriting means for erasing the number of photographable images each time the preliminary winding means counts the number of photographable images. A first updating write on the ^E 2 PROM 2
Rewriting means for writing a signal during the first frame set into the E ² PROM at the start of the first frame set, and erasing the signal during the first frame set at the end of the first frame set; and loading the battery into the camera. In response to the E ² PROM
When the preliminary winding signal is left, if the battery is loaded within the power supply backup time, the retained number of shots is used. with number of recordable images stored in the E ² PROM, a first control means for continuing the preparatory winding by driving the auxiliary wound means, responsive to the loading of the battery to the camera, the E ² PROM
If the signal during the first frame setting is left, and if the battery is loaded within the power supply backup time, the number of shots that are retained is used, and if the battery is loaded after the power supply backup time has elapsed. The E ² P
A second control unit that continues the first frame setting by driving the first frame setting unit using the number of recordable images stored in the ROM. 2. The method according to claim 1, wherein the first rewriting means is configured to start the preliminary winding when a one-frame pulse given based on the detection of the perforation of the film is not given within a predetermined time and the battery voltage is higher than a predetermined voltage. 2. The camera control device according to claim 1, wherein the pre-winding signal is deleted upon recognition that the pre-winding operation has been completed. 3. The third rewriting means recognizes that the first frame set is completed by giving a predetermined number of one-frame pulses based on the detection of film perforation after the start of the first frame set. 2. The camera control device according to claim 1, wherein the signal during the first frame set is erased. 4. The method according to claim 1, wherein the third rewriting means does not provide a one-frame pulse given based on the detection of film perforation during a first frame set within a predetermined time, and the battery voltage is higher than a predetermined voltage. In case,
2. The camera control device according to claim 1, wherein the signal during the first frame setting is deleted upon recognition of a film feeding abnormality.