JPH07301856A - Camera equipped with easy loading device - Google Patents

Abstract

PURPOSE:To provide a camera equipped with an easy loading device by which easy loading is surely executed. CONSTITUTION:This camera is equipped with an easy loading device 100 taking up film to a photographing feasible position in a state where a film leader part pulled out from a cartridge is pulled out to a position where it can be taken up to a take-up shaft; a loading detecting means 101 detecting that the cartridge is loaded in the camera; and a leader part detection means 102 detecting that the film leader part is pulled out to the position where it can be taken up. Then, it is also equipped with an easy loading driving control means 103 inhibiting winding the film by the device 100 when the detection means 101 detects the loading of the cartridge and the detection means 102 does not detect the film leader part, and executing winding the film by the device 100 when the means 102 at least detects the film leader part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera equipped with an easy loading device for automatically winding a film when the film is loaded so that the film can be photographed.

[0002]

2. Description of the Related Art The following two types of cameras are known as cameras equipped with a conventional easy loading device. (1) A patrone switch that is turned on when a film is loaded in the patrone chamber and a back lid switch that is turned on when the back lid is closed are provided, and the operation of the easy loading device is activated when the patrone switch is on and the back lid switch is on. What to allow. (2) A film presence / absence switch that is turned off when the leader portion of the film is pulled out by a predetermined length and a back lid switch that is turned on when the back lid is closed are provided, and the film presence / absence switch is off and the back lid switch is on. The one that allows the operation of the easy loading device.

[0003]

According to the method (1), the easy loading device starts to operate and the film winding motor is started even if the leader portion of the film is not sufficiently drawn out. Is not done and easy loading fails. Therefore, the battery is uselessly consumed. In addition, with this method, if the easy loading fails under the above conditions, there is a risk that it will start shooting because it thinks that it was easy loaded, so it is configured to warn that the easy loading could not be done. There is. Due to this warning, the photographer opens the back cover and reloads the film, but the film may be pulled out somewhat undesirably by the rotation of the winding motor.
When the case back is opened, that portion is exposed, and the number of frames that can be photographed thereafter decreases.

On the other hand, in the method (2), when the presence / absence switch is ON, the leader portion of the film is not fully pulled out. At this time, if the release button is operated, the camera side will take a blank picture. Upon recognition, the hoist motor rotates. In this case, since the film existence switch is not originally turned on, the camera does not recognize it as easy loading, and therefore the easy loading failure warning is not issued. Therefore, the photographer may be mistaken for easy loading and may start shooting.

It is an object of the present invention to provide a camera equipped with an easy loading device that ensures easy loading.

[0006]

The present invention will be described with reference to FIG. 1, which is a diagram corresponding to claims. According to the present invention, a film leader portion pulled out from a film cartridge loaded in a camera can be wound around a winding shaft. The present invention is applied to a camera equipped with an easy loading device 100 that winds a film to a photographic position while being pulled out to another position.
The above-described objects are as follows: a loading detection unit 101 that detects that the film cartridge has been loaded in the camera, a leader unit detection unit 102 that detects whether the film leader unit is pulled out to a position where it can be wound, and a loading detection unit. When the means 101 detects the loading of the film cartridge and the leader detecting means 102 does not detect the film leader, the easy loading device 100 prohibits film winding, and at least the leader detecting means 1
This is achieved by including the easy loading drive control means 103 for performing film winding by the easy loading device 100 when 02 detects the film leader section. In particular, the invention of claim 2 is a display means for displaying a warning, and a display means for displaying a warning when the loading detecting means detects loading of the film cartridge and the leader detecting means does not detect the film leader. And display control means for controlling. According to the invention of claim 3, the patrone mark and the film mark can be displayed, and when the loading detecting means detects the loading of the film cartridge and the leader detecting means does not detect the film leader, the patrone mark is used. A warning is displayed. Further, the invention of claim 4 makes it possible to display the cartridge mark and the film mark, and when the loading detection means detects the loading of the film cartridge and the leader detection means does not detect the film leader, the cartridge mark and the film mark are displayed. A warning is displayed by a film mark.

[0007]

When the loading of the film cartridge is detected and it is detected that the film leader portion is not fully pulled out, the film winding by the easy loading device 100 is prohibited. Further, when it is detected that at least the film leader portion is sufficiently pulled out, the film winding by the easy loading device 100 is executed.

[0008]

FIG. 2 is a block diagram of an embodiment of a control system of a camera provided with an easy loading device according to the present invention. Reference numeral 10 denotes a control circuit including a microcomputer. This control system is mainly composed of a control circuit 10 (hereinafter referred to as MCU 10), a DX code reading section 11, a photometry section 1
2, EEPROM 13, LCD display unit 14, aperture control unit 15, shutter control unit 16, motor 17, release switch SW1, back cover switch SW2, film presence / absence switch SW3.

FIG. 3 is a rear view of the camera according to the present invention. Reference numeral 21 denotes a DX contact, which is connected to the DX code reading unit 11 in FIG. 2 and enables the DX code of the Patrone to be read through the DX contact 21. This D
As shown in FIG. 4, the X code is a DX code pattern DP formed by patterning a part of the cartridge P with a conductor and a nonconductor.
When the film is loaded, the DX contact 21 comes into contact with the DX code pattern DP and the DX code is read. Reference numeral 22 denotes a film presence / absence detecting member, which is retracted when pushed according to the loading of the film, turns off the film presence / absence switch SW3 in FIG. 2, and turns on the film presence / absence switch SW3 in a state where it is not pushed.

Reference numeral 23 is a mark that serves as a guide for pulling out the leading end of the film, and reference numeral 24 is a back cover.
When 4 is opened, the back cover switch SW2 is turned off, and when closed, the back cover switch SW2 is turned on. Therefore, when the back lid 24 is closed with the leader portion of the film pulled up to the mark 23 and set, the back lid switch SW2 is turned on and the film presence / absence switch SW3 is turned off, and the film leader portion is set by the microcomputer. Can be detected. On the other hand, when the leader portion of the film is not pulled out to the mark 23, the film presence / absence switch SW3 remains on, so that the microcomputer can detect that the film leader portion is not correctly set.

Reference numeral 25 is a sprocket and 26 is a spool. The spool 26 is driven by a motor 17. The film presence / absence detection member 22 is a sprocket 25.
The film can be wound as long as the film presence / absence switch SW3 is off. The LCD display unit 14 can display the feeding state of the film, and the feeding display is as shown in FIG.
It is composed of two divided film leader marks b, c and d.

The display contents are shown in the following table.

[Table 1] Column 0 of this table shows a state in which none of the marks a, b, c, and d are lit and a film is not loaded. The first column shows a state in which the marks a, b, and c are lit and winding is in progress. Two
The columns indicate the completed winding state with the marks a, b, c and d lit. The third column shows a state where the marks a, c, and d are lit and the film is being rewound. In column 4, only the mark a lights up and the rewinding completion state is shown. Column 5 shows a state where the marks a and b are blinking and the film leader is not sufficiently pulled out. An easy loading failure warning in step S104 of FIG. 6 described later is given by the display in column 5 of the above table. If the number of types of display is reduced, the display in four columns may be used.

FIG. 6 shows a flow chart of the timer interrupt processing routine of the MCU 10. The MCU 10 calls this routine at fixed time intervals. Step S1
On / off of the back cover switch SW2 is identified by 01, and if it is off, the process returns as it is, and if it is on, step S10.
Go to 2. In step S102, the presence / absence of a film is discriminated from the on / off state of the film presence / absence switch SW3. If it is discriminated that there is no film, the process proceeds to step S103, and if it is discriminated that the film is present, the process proceeds to step S105. In step S103, the information from the DX contact 21 is read and it is discriminated whether or not the information indicates a DX code. If the loaded film is a DX film, one of the contacts of the DX contact 21 turns on.
If it is not the X film, all the contacts are turned off, so that the DX film can be identified.

If the film is a DX film, the process advances to step S104 to display a warning and then returns. On the other hand, if the film is not a DX film, the process proceeds to step S105.
In step S105, it is checked whether or not the release switch SW1 is on. If it is off, the process returns, and if it is on, the process proceeds to step S106. In step S106, the contents of a frame counter (not shown) are discriminated, and if the film winding is completed and "1" to "99" are displayed, the process proceeds to step S108, and the film is wound. If there is no "E" displayed, the process proceeds to step S107.

In step S107, the presence / absence of a film is determined by identifying whether the film presence switch SW3 is on or off. If there is no film, the process proceeds to step S108, and if there is a film, the process proceeds to step S109.

In step S108, a normal release sequence process is performed. That is, the motor 17
Aperture control unit 15 with the start of driving
Then, the shutter control unit 16 performs shutter control. Further, shutter charging and film winding are performed in the mirror down process. On the other hand, if the process proceeds to step S109, the easy loading process is performed. That is, the motor 17 is drive-controlled to repeat film winding three times, and the film is spooled 26.
The exposed part that was pulled out when the film was loaded is completely wound up.

Next, the operation according to the difference in the film loading state will be described. First, with the back cover 24 open,
Since the process returns in the determination of step S101 in FIG. 6, neither normal release nor easy loading can be executed.

Next, the case where the back cover 24 is closed and the release button is operated without loading the film will be described. In this case, steps S101 to S1
The process proceeds to step 02, but since no film is loaded, the process proceeds from step S102 to step S103. Step S10
When the state of the DX contact is read in 3, the film is not loaded, and therefore the process proceeds from step S103 to step S105. In step S105, the release switch S
When W1 is detected to be turned on, the process proceeds to step S106. When the number of frames is determined in step S106, the number of frames before execution of easy loading displays "E", so the process proceeds to step S107. In step S107,
Since there is no film, it is determined that the film presence / absence switch SW3 is on, and the process proceeds to step S108 to perform a normal release process. In this way, aerial photography is possible. During this period, the feeding display on the LCD display unit 14 remains the 0th column in the above table.

Next, the film is loaded and the mark 2 in FIG.
A case where the leader portion of the film is pulled out to the position 3 and the release button is operated will be described. In this case,
When the process proceeds from step S101 to step S102,
Since the presence / absence of a film can be identified by turning off the film presence / absence switch SW3 interlocking with the film presence / absence detection member 22 of FIG. 2, the process proceeds to step S105. In step S105, when it is detected that the release switch SW1 is turned on, the process proceeds to step S106. When the number of frames is determined in step S106, the number of frames before execution of easy loading displays "E", so the process proceeds to step S107. In step S107, the film presence switch S
It is determined whether W3 is on or off. However, since there is a film and the switch SW3 is off, the process proceeds to step S109,
Perform easy loading process. In this easy loading processing routine, winding is performed for three frames in the display state of the first column in the above table, and when the winding is completed, the second column is displayed and the total number of frames is set to "1".

Therefore, in the subsequent release button operation, the process similarly proceeds from step S101 to step S106, and in step S106, since the frame number counter is now "1" and not "E", step S10.
8, the normal release processing is performed.

Next, the case where the release button is operated while the leader of the DX film is pulled out insufficiently will be described. When the film is loaded and set in the camera and the leader portion is not sufficiently pulled out, the film presence / absence switch SW3 interlocking with the film presence / absence detection member 22 in FIG. 3 remains ON. Therefore, in this case, the process proceeds from step S102 to step S103 in FIG. Step S10
3, the DX film is discriminated, but since the film cartridge is at the position of the DX contact 21, the MCU 10 detects the DX code by the DX code reading unit 11 and proceeds to step S104. In step S104, the display in the 5th column of the above table blinks and the process returns. Therefore, neither the release process nor the easy loading process is executed, even though the release switch SW1 is turned on. As a result, before the release, a warning of a setting error that the film leader portion is not sufficiently pulled out is issued. When the photographer opens the back cover by this warning, the warning display is terminated.

According to the above embodiment, when it is detected that the film cartridge is loaded in the cartridge chamber and that the film leader is not fully pulled out, an easy loading failure warning is issued. Is prohibited, and the easy loading device is allowed to be driven at least when it is detected that the film leader portion is sufficiently pulled out. Therefore, the easy loading device is not driven in the film set state where the easy loading is not surely performed, so that the undesired driving of the motor is prevented and the wasteful consumption of the battery is avoided. In the case of a conventional device that allows easy loading when the loading of film is detected by turning on the Patrone switch, even if the leader is not pulled out sufficiently, if the Patrone switch is turned on, the winding motor rotates and the film leader section is pulled out slightly. Sometimes, the number of film frames exposed when opening the case back increased. However, as in this embodiment, if the hoisting motor is not started from the beginning when easy loading cannot be performed even if the leader portion is not sufficiently pulled out, such a problem can be prevented.

In the above description, whether or not the film is loaded is detected by the signal from the DX contact 21. However, a special identification switch may be provided. The same control as is possible.

In the configuration of the above embodiment, the control circuit 1
0 is the loading detection means 101 and the reader part detection means 102.
And an easy loading drive control means 103, respectively.

[0025]

According to the present invention, when it is detected that the film cartridge is loaded and the film leader portion is not sufficiently pulled out, the easy loading device is prohibited from starting, and at least the film leader portion is When it is detected that the film has been sufficiently drawn out, the driving of the easy loading device is permitted, so that it is possible to prevent unnecessary consumption of the battery and undesired exposure of the film. In particular, if a warning is displayed when it is detected that the film cartridge is loaded and the film leader is not fully pulled out, the photographer is notified that easy loading is prohibited. Therefore, it is possible to prevent the inconvenience that the photographer mistakenly thinks that the easy loading has been performed and starts photographing.

[Brief description of drawings]

FIG. 1 is a complaint correspondence diagram.

FIG. 2 is a block diagram showing an embodiment.

FIG. 3 is a perspective view of the camera as seen from the back side.

FIG. 4 is a diagram showing a DX code pattern of a film cartridge.

FIG. 5 is a diagram showing a display state of a display unit.

FIG. 6 is a flowchart showing an example of a processing procedure.

[Explanation of symbols]

 10 Control Circuit 11 DX Code Reading Part 14 LCD Display Part 21 DX Contact 22 Film Presence / Absence Detection Member 23 Mark 24 Back Lid SW1 Release Switch SW2 Back Lid Switch SW3 Film Presence / Absence Switch 100 Easy Loading Device 101 Loading Detection Means 102 Reader Section Detection Means 103 Easy loading drive control means

Claims (4)

[Claims] 1. An easy loading device for winding a film to a photographing position in a state where a film leader portion pulled out from a film cartridge loaded in a camera is pulled out to a winding position on a winding shaft. In the camera, a loading detection unit that detects that the film cartridge is loaded in the camera, a leader unit detection unit that detects whether the film leader unit is pulled out to the winding position, and the loading detection unit are When the loading of the film cartridge is detected and the leader detecting means does not detect the film leader, the easy loading device prohibits the film winding, and at least the leader detecting means detects the film leader. When using the easy loading device A camera equipped with an easy loading device, comprising: an easy loading drive control means for performing hoisting. 2. Display means for displaying a warning, and said display means for displaying a warning when said loading detecting means detects loading of a film cartridge and said leader detecting means does not detect a film leader. A camera provided with the easy loading device according to claim 1, further comprising display control means for controlling the. 3. The display means is capable of displaying a patrone mark and a film mark, the display control means detects the loading of the film patrone in the display control means, and the leader section detection means in the film reader. 3. The camera with an easy loading device according to claim 2, wherein the display means is controlled to display a warning by the patrone mark when no part is detected. 4. The display means is capable of displaying a cartridge mark and a film mark, the display control means detects the loading of the film cartridge by the loading detection means, and the reader section detection means detects the film reader. 3. The camera with an easy loading apparatus according to claim 2, wherein the display means is controlled to display a warning by the patrone mark and the film mark when no part is detected.