JPS61156244A - Camera - Google Patents

Abstract

PURPOSE:To exactly grasp the operating condition of a camera, by displaying the success of initial feeding of a film without taking photographs by sending a signal to an indicator irrespectively of the state of a barrier switch when the initial feeding is successful. CONSTITUTION:When a barrier is closed and a barrier switch 4 is turned off and, as a result, a photographing-able condition is not set, an indicator 36 does not make any indication. When the initial feeding operation of a film without taking photographs is started and a counter 20 counts the operation of a sprocket switch 5 for the four frames of the film, the count value is displayed by the indicator 36 by means of the signal of a control circuit 36 irrespectively of the barrier. The display is erased after a prescribed time has passed from the termination of the initial feeding operation and displayed only when the barrier is opened. Since the display of the indicator 36 is automatically erased when the success of the initial feed operation is confirmed in such a way, useless consumption of a battery can be prevented while the operating condition of a camera is exactly grasped.

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention provides a camera that performs a jump feed operation when setting film, and when the jump feed operation fails, the failure is detected and the user is notified of the failure. Concerning the camera that informs.

<Prior art> The present applicant first provided a switch that is linked to the lens cover or barrier, etc., and when it is detected that the lens cover is attached or the barrier etc. is closed and photography is not possible, all indications on the display are turned off. We are proposing a camera that is designed to: However, in this case, even if the film is loaded with the barrier etc. closed and the frame is fed, the frame advance status of the film is not displayed on the display, so it is very inconvenient to not know whether or not the film has been successfully fed. It was something.

(Summary of the Invention) The present invention has been made in view of the above circumstances, and has a timer means that is reset by the running of the film, and when a failure in the film feed is detected by the output of the timer means, the release of the camera is activated. At the same time, regardless of the state of the prohibition means that prohibits the shooting operation, the failure of the empty feed is displayed, so that the display is turned off when a shooting prevention member such as a barrier or a lens cover is in operation. To provide a camera that allows a user to easily know whether or not a blank feed has failed even in a camera, and completely eliminates failures in photographing.

2 (Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, l is turned off when the back cover is closed using the back cover switch 4. 2 is a film presence/absence switch which is configured to turn off when film is loaded. 3 is a release switch which, when turned on, performs regular photography.

4 is a sprocket switch that detects the fixed length feed of the film, and this switch is turned off once, for example, and then turned off.
It is mechanically constructed so that it can detect that a - frame has been moved when n is reached. 5 is an and gate, 6 is an or gate,
7 is a resistor, 8 is a switching transistor (hereinafter referred to as T
9 is a winding motor, and the sprocket switch 4 is turned on and off in synchronization with the operation of the motor 9.

10. 33 is an inverter; 11 is a known exposure control circuit that performs photometry, etc. 1 opens the shutter according to the photometry value and takes a picture; 12 is a motor control that feeds the film by a fixed length after exposure control is completed It is a circuit. 13 is a counter for counting the number of on-off times of the sprocket switch 4, 14 is a Noah gate, 15.16.17
is an inverter, 18 is a D-type flip-flop (hereinafter abbreviated as D-FF), 19 is an AND gate, 20.21,
22, 23, 24 are Nantes Gate, especially (20, 21
)(23, 24) constitute a latch circuit. 25 is an and gate, 36°37.38 is an and gate, 39-4
1 constitutes a driver for the LCD panel 42 with an exhaustive orr. 43 is a control circuit that controls the display on the LCD panel 42. 28 is an oscillator, and 29 is a frequency divider. 5 is turned on when the barrier switch is used to open the barrier for photographing. 45 is an inverter,
49.50 is an AND gate, and 46 is an OR gate.

FIG. 2 shows another embodiment of the display section, in which 44 is an inverter;
6 is an LED, and 46 is a resistor. FIG. 3 is a timing chart of the circuit of FIG.

The operation of the above circuit will be explained below.

1) When the film is not loaded, the film left/right switch 2 is on, the output of the AND gate 34 is "L", and the output of the inverter 16 is "H".
The counter 13 is in a reset state. Therefore, QuQm, which is the output of the counter 13, becomes "Lo", and (Nando game) (20, 21) (24, 23)
The latch circuit is set to NAND 2 by an initial setting circuit (not shown).
The output of 0.23 is set to be "L". Since the film presence/absence switch 2 is onl, the output of the AND gate 5 is "L II". Also, the inverter lO
Since the output of is HII, AND gate 30 is selected. When the barrier changes from closed to open, the switch 51
is onl, and the output of the inverter 45 is "°°H".

When the release switch 3 is turned on, the output of the inverter 33 becomes "H", the output of the anti-gate 30 becomes "H", the output of the OR gate 31 becomes "HII", and the exposure control circuit 11 is excited. After exposure is performed, the motor control circuit 12 is excited to output "HII" to the OR gate 6. 11 The time of HII is determined by a timer in the circuit 12. ° “Only during HII, the output of the OR gate 6 becomes “H” and turns on the transistor 8, onl, motor 9.
Rotate. When the timer expires, the output of the OR gate 6 becomes "L", the transistor 8 is turned off, and the motor 9 stops rotating.

On the other hand, since the output of the Nant gate 23 is "L II", the output of the AND gate 25 is "Lo".

Also, if the barrier is opened, the output of the AND gate 49 is "H", and the output of the OR gate 46 is "H".
AND gates 36-38 output the output of control circuit 43 as is, and drive LCD panel 42 by exhaustive ORs 39-41. However, when the barrier is closed, the output of the AND gate 49 becomes "L" and the output of the OR gate 46 becomes "L", so that the display disappears.

2) When the film is loaded When the film is loaded and the back cover is closed, switches 1 and 2 are turned off, so the output of the AND gate 34 becomes ``HII'', the output of the inverter 16 becomes ``L'', and the counter 13 reset is released and sprocket switch 4
Waiting for input from.

On the other hand, since the output of NAND game) 20.23 is "L", the output of NOAH game) 14 becomes "H", and the AND gate 5
The output of the OR gate 6 becomes "H", and the transistor 8 rotates the ONL motor 9 through the resistor 7. Accordingly, the sprocket switch 4 turns on and off.The counter 13 changes from OFF to ON. When the number is counted a certain number of times, for example, 4 times, the state of Qm changes from "L" to "H". This situation is shown in Figure 3. Since the output of the inverter 15 becomes "L", the state of Qm changes from "L" to "H". The output of the gate 20 is latched to HII, the output of the NOR gate 14 becomes "L", the output of the AND gate 5 becomes "L", the transistor 8 is turned off, the rotation of the motor 9 is stopped, and the idle feed is completed. At this time, since the output of the Nant gate 24 is always "H", the output of the AND gate 49 becomes "H" if the barrier is open, and since the OR gate 46 is "H", the display is the same as that of the control circuit 43. Depends on the output.

Next, a case where the jump feed fails will be explained.

As shown in FIG. 3, it is assumed that the sprocket switch 4 is turned on and off only once. One shot by 0-FF18 and Antogame)19, sprocket switch 4 goes from off to onl.

It resets the frequency divider 29.

In other words, if the time interval from when the sprocket switch 4 is turned on becomes longer, QD becomes "H",
4 times sprocket switch 4 is onl, then counter 13
All inputs to the Nant gate 22 become "H" before Qm becomes "H".

The output of the Nant gate 23 is latched to H''.

At that time, the output of the Nant gate 24 becomes "L", causing the output of the AND gate 32 to become "L".

At the same time, the output of the NOR game 114 also becomes "L", and by setting the output of the AND gate 5 to "L", the transistor 8 is turned off.
ffL, the rotation of the motor 9 is stopped. Nantes Gate 2
Since the output of the AND gate 32 becomes "L" even if the release switch 3 is turned on, the release is prohibited when a blank feed fails.At the same time, the AND gate 49 The output becomes “L°”,
The output of the AND gate 25 is the Qc output of the frequency divider 29 as it is, and it is passed through the OR gate 46 to the LCD panel 4.
The display of 2 blinks. In this case, the barrier switch 51
It does not matter whether it is on or off.

FIG. 2 is a circuit diagram showing another embodiment of the above display configuration. The AND gate 25 in FIG. 1 is used in common to cause an LED 27 to blink through a resistor 26 when a blank feed fails. In this case as well, the LED 27 blinks regardless of whether the barrier is opened or closed.

The barrier switch 5 in the above embodiment may be linked to the opening and closing of other photographic blocking members other than the barrier, such as a lens cover, a shirt release safety cover, etc.

(Effects of the Invention) As explained above, the present invention has a timer means that is reset by the running of the film, and when a failure in empty feed is detected by the output of the timer means, the release operation of the camera is prohibited, and Since the camera is designed to prevent the display of a blank feed failure regardless of the state of the prohibition means that prohibits the photographing operation, it is a camera that turns off the display when a photographing prevention member such as a barrier or a lens cover is in operation. In addition, the user can easily know whether or not the free feed has failed, and since the release is prohibited when the free feed fails, there is no possibility that the shooting will fail, and the release will be prohibited due to the failure of the free feed. Even if the camera fails, you can see that the feed has failed by looking at the display, so you won't be mistaken as thinking that the camera is malfunctioning, and this is extremely effective.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
FIG. 3 is a circuit diagram showing another embodiment of the display section in the figure, and FIG. 3 is the timing t yard of FIG. 1. i-111 Back cover switch 2-111 Film positioning switch 3-1--Release switch 4-111 Sui rocket switch 5-111 Barrier switch Patent applicant Canon Co., Ltd. Representative Marushima (Issuance of Procedural Amendment) July 1, 1985 1, Indication of the case 1982 Patent Application No. 276986 2, Title of invention Camera. 3. Relationship with the case of the person making the amendment Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
) Canon Co., Ltd. Representative Ryuzo Kaku
Part 4, Agent's residence 3-30-25 Shimomaruko, Ota-ku, Tokyo 148, Description and drawings subject to amendment 6, Contents of amendment (1) The entire text of the specification is amended as shown in the attached sheet. (2) Correct the □ side of all drawings as shown in the attached sheet. Amended Description 13 Title of the Invention Camera 2, Claims A signal generation circuit that outputs information necessary for photographing, a display circuit that displays the output of the signal generation circuit, the above-mentioned signal generation circuit and the above-mentioned display circuit a blocking circuit provided between the signal generation circuit and the blocking circuit for blocking the signal output from the signal generating circuit from being input to the display circuit; Even if the actuating switch and the lens protection member are in a state to protect the photographic lens, when the jump feed operation is successful, a jump feed success signal is input to the display circuit regardless of the state of the switch. A camera characterized in that it is provided with an empty feed success notification circuit that displays the status of successful feed. 3. Detailed Description of the Invention (Field of Application for Industry-F) The present invention relates to a camera that performs a film feed operation when loading a film, and particularly relates to a notification device when the film feed operation is successful. <Prior art> The present applicant previously disclosed in Japanese Patent Application No. 59-59342 that a display device for displaying photographing information is provided outside the camera body, and a lens protection member such as a lens cover or barrier is used to protect the front surface of the photographic lens. We have proposed a camera that allows you to easily know that the camera cannot take pictures by setting the display on the display device to a blank state when the camera is covered. However, even if the front surface of the photographic lens is covered with a lens protection member, the display on the display device will be erased in cameras that can perform a jump feed operation, so whether or not the jump feed operation was successful is not displayed on the display device. This had the disadvantage that it made the photographer uneasy. <Object of the Invention> The present invention has been made in view of the above circumstances, and includes: a signal generation circuit that outputs information necessary for photographing; a display circuit that displays the output of the signal generation circuit; A blocking circuit is provided between the circuit and the display circuit, and prevents the signal output from the signal generation circuit from being input to the display circuit, and a lens protection member is placed in a state for photographing, photographing, and protecting the lens. Even if the switch that activates the blocking circuit and the lens protection member are in a state to protect the photographic lens in conjunction with this, when the empty feed operation is successful, the empty feed success signal is generated regardless of the state of the switch. is input to the display circuit, and a jump feed success notification circuit is provided to display the state of successful jump feed, and when the lens protection member is in a state of protecting the photographing lens, the display is cleared to notify the photographer. To provide a camera that allows the camera to display this state exceptionally when the empty feed operation is successful, and allows the user to accurately grasp the operating state. <Example> ゛Hereinafter, an example of the present invention will be described based on the drawings. Fig. 1 shows a circuit diagram of a camera according to the present invention. In Fig. 1, l is a back cover switch that is turned off when the back cover is closed, and 2 is a film presence/absence switch that is turned off when film is loaded into the camera. . 3 is a release switch that starts the photographing operation when turned on; 4 is a barrier switch that is turned on when the barrier as a photographing lens protection member opens and the camera is ready to take a photograph; 5 is a release switch that is linked to the movement of the film, for example. A sprocket switch is turned on and off once each time the film is wound by one frame, and detects the winding of one frame of film. 6 is an AND gate, 7 is an AND gate,
8 is or gate, 9 is resistance. 10 is a switching transistor, 11 is a film winding motor, 12 is a battery as a driving source for the motor 11, and 13 and 14 are inverters. 15 is an AND gate; 16 is an exposure control circuit for performing automatic exposure control according to the brightness of the subject; and 17 is a drive control circuit for controlling the motor 11 after the exposure operation by the exposure control circuit 16 has been completed, and transfers one frame of the photographed film. , a motor control circuit for automatic winding, 18 an inverter, 19 an OR gate. 20 counts the number of on/off times of the sprocket switch 5, and outputs a high level (hereinafter abbreviated as "H") from the output Q when it is detected that the film has been wound by 4 frames. Counter, 2.1 is an inverter, 22.
23 is a NAND game that constitutes the latch circuit F1), 24
．． 25 is a Nant gate, 26.27 is a Nant gate forming the latch circuit F2, and 28 is an AND gate. 29 is an or gate, 30-32 is an and gate. Reference numerals 33 to 35 are exhaustive or, and 36 is a display device such as a liquid crystal panel provided outside the camera. 37 is a control circuit for outputting a signal to be displayed on the display 36, 38 is an inverter, 39 is a D type flip-flop, 40 is an AND gate, and the D type flip 39 and AND gate 40 constitute a one-shot circuit S. 41 is an oscillator, 42 divides the output of the oscillator 41,
This is a frequency divider that outputs frequency divided outputs QA and Q days. Next, the operation of the above circuit will be explained. When the film is loaded and the back cover is closed, the back cover switch 1.
Both film presence/absence switches 2 are turned off. Therefore, the output of AND gate 6 is °l HII. The output of the inverter 18 becomes a low level (hereinafter abbreviated as "L11"), and the output of the OR game) 19 becomes "II L", and the reset state of the counter 20 is released. On the other hand, the counter 20 is in the AND gate 6 until the film is loaded and the back cover is closed.
The output of inverter 11 is I L 11, and the output of inverter 18 is HII
Since it was, the output of (or game) 19 is “H11,
It is in a reset state, and the output Q is "L'. Therefore, II HII is input from the inverter 21 to the Nantes gate 22 of the latch circuit F1. Since the back cover switch l is on when the back cover is opened, L'' is input to the Nantes gate 23, and in the latch circuit F1, the output of the Nantes gate 22 is latched to II L 11, and the output of the Nantes gate 23 is latched to HII.This state is maintained even after the back cover is opened. Therefore, the output of "Hoo" is inputted from the Nantes gate 23 to one input terminal of the AND gate 7, and when a film is loaded, the back cover is closed, and both the back cover switch 1 and the film presence/absence switch 2 are turned off, and gate 7
The output of becomes H°' and is passed through resistor 9 to transistor 1.
Turn on 0. Then, the motor 11 rotates and the film starts to be fed. As the film moves, the sprocket switch 5 repeats on/off. The counter 20 counts the number of times the sprocket switch 5 is turned on and off, and when the number of times reaches a value equivalent to four frames of film, the output Q becomes "L1".
When the Q output of the counter 20 changes from "L11" to "H", the output of the inverter 21 becomes LII, so the Nant gate 23 is latched to "L'', and the AND gate The output of 7 is set to "l L 1'. Therefore, the transistor IO is turned off, the motor 9 stops rotating, and the idle feeding operation is completed. On the other hand, in the display 36, when the OR gate 29 outputs "H", the AND gates 30 to 32 can output the signal from the control circuit 37. When the signal from the control circuit 37 is output from the AND gates 30 to 32, this signal
5 is displayed on the display 36. Until the empty feed operation is completed, the output of the Nant gate 22 is latched at "L°", so the output of the AND gate 28 is "L", when the barrier is open and the barrier switch 4 is on. Only then, the inverter 14 outputs H'' and the display 36 enters the display state. In other words, until the empty feed operation is completed, the barrier is closed and the display on the display 36 is also erased to notify that the camera is not in a shooting ready state. During the free feed operation, the signal from sprocket 5 is sent to inverter 3.
By inputting to the one-shot circuit S via 8,
In conjunction with the on/off of sprocket switch≠5, one-shot circuit S momentarily outputs 1j HII. During the idle feed operation, the output of the NAND gate 22 is "L"', so the output of the NAND gate 24 is lHI', and the output of the NAND gate 23 is H11, so the one-shot circuit S outputs HII. Every time Nantes Gate 25
Therefore, the output of the latch circuit F2 is set to H. When the idle feed operation is completed and the output Q of the counter 20 becomes "HII" and the Nant gate 22 outputs "L11", the output of the AND gate 28 becomes "H°", and the fact that the idle feed is completed is outputted to the control circuit 37. At the same time, the output of the OR gate 29 is set to "H" regardless of whether the barrier is opened or closed. Therefore, even if the barrier is closed when the jump feed is successful, that is, even if the display 36 is in the erased state and indicates that shooting is not possible, exceptionally the number of shooting frames is 11111.
is displayed to inform the user that the jump feed operation was successful. During idle feeding, the frequency divider 42 is set to HI of the one-shot circuit S.
It is reset by the I output, but after the end of the idle feed, HII is no longer output from the one-shot circuit S, so after a predetermined time has elapsed after the end of the idle feed, the output 9 of the frequency divider
The output Q of the 0 frequency divider 42 when the day changes from L°゛ to HII
When B changes from L° to "H°", the output of the Nant gate 24 becomes "Lo" because the output of the Nant gate 22 becomes "H°" due to the completion of the empty feed operation.
The output of the latch circuit F2 is set to L II, and the output of the AND gate 28 is set to "L". Therefore, when the barrier is closed, the display on the display 36 is erased after a predetermined period of time has passed since the end of the empty feed operation, and the display 36 is displayed again only when the barrier is opened. After confirming the success of the empty feed operation in this way, the display 36
Since the display is automatically erased, this is an extremely effective power-saving measure for cameras that only have small-capacity batteries, and it is also extremely effective because it is possible to once again know whether the barrier is open or closed based on the presence or absence of the display. Note that while the barrier is open, the display state of the display 36 is maintained as it is. After that, when the release switch 3 is turned on with the barrier opened and the barrier switch 4 turned on, the inverter 13.
Both outputs of 14 become H++, and the output of AND gate 15 becomes "H", exciting the exposure control circuit 16 and starting the exposure operation. When the exposure operation is completed, the motor control circuit 17 turns on the transistor IO. Then, the motor 11 is driven to wind one frame of the film.In the above embodiment, the barrier switch is a member other than the barrier, such as a lens cover, a shirt release safety cover, etc., which makes the camera substantially unable to take pictures. The present invention can be achieved by linking with whatever device there is.Also, by placing the display 36 near the finder window on the back of the camera or on the top of the camera, it is possible to confirm that the camera is not in a shooting-ready state. In this embodiment, the control circuit 37 is the signal generating circuit of the present invention, the display 36 is the display circuit, the antgame) 30,
31 and 32 correspond to a blocking circuit, barrier switch 4 corresponds to a switch, and counter 2° corresponds to an idle feed success notification circuit, respectively. <Effects of the Invention> As explained above, according to the present invention, there is a signal generation circuit that outputs information necessary for photographing, a display circuit that displays the output of the signal generation circuit, and a connection between the signal generation circuit and the display circuit. a blocking circuit that is provided to prevent the signal output from the signal generating circuit from being input to the display circuit; and a blocking circuit that operates in conjunction with the lens protection member being in a state where it protects the photographic lens. Even if the switch and the above-mentioned lens protection member are in a state to protect the photographic lens,
When the jump feed operation is successful, a jump feed success signal is input to the display circuit regardless of the state of the switch, and the camera is provided with a jump feed success notification circuit that displays the status of the jump feed success, and the lens protection member When the camera is in a state to protect the photographic lens, the display is cleared to let the photographer know, and this state is exceptionally displayed when the camera performs a successful free feed operation. Because of this, even the above-mentioned camera can accurately grasp the operating state, and its effectiveness is extremely high. 4. Brief Description of the Drawings FIG. 1 is a circuit diagram showing an embodiment of the camera circuit according to the present invention. 1-1-- Back cover switch. There are 2-11 films available. 3---Release switch. 4-111 barrier switch. 5-11 sprocket switch. 20---Ichiriki Tsunta, 3B---Display device.

Claims (1)

[Claims] It has a timer means that is reset by the running of the film, and when a failure in jump feed is detected by the output of the timer means, the release operation of the camera is prohibited and the jump feed is disabled regardless of the state of the prohibition means that prohibits the shooting operation. A camera characterized by displaying failures.